File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/net/openvswitch/Kconfig b/net/openvswitch/Kconfig
new file mode 100644
index 0000000..d143aa9
--- /dev/null
+++ b/net/openvswitch/Kconfig
@@ -0,0 +1,69 @@
+#
+# Open vSwitch
+#
+
+config OPENVSWITCH
+ tristate "Open vSwitch"
+ depends on INET
+ depends on !NF_CONNTRACK || \
+ (NF_CONNTRACK && (!NF_DEFRAG_IPV6 || NF_DEFRAG_IPV6))
+ select LIBCRC32C
+ select MPLS
+ select NET_MPLS_GSO
+ ---help---
+ Open vSwitch is a multilayer Ethernet switch targeted at virtualized
+ environments. In addition to supporting a variety of features
+ expected in a traditional hardware switch, it enables fine-grained
+ programmatic extension and flow-based control of the network. This
+ control is useful in a wide variety of applications but is
+ particularly important in multi-server virtualization deployments,
+ which are often characterized by highly dynamic endpoints and the
+ need to maintain logical abstractions for multiple tenants.
+
+ The Open vSwitch datapath provides an in-kernel fast path for packet
+ forwarding. It is complemented by a userspace daemon, ovs-vswitchd,
+ which is able to accept configuration from a variety of sources and
+ translate it into packet processing rules.
+
+ See http://openvswitch.org for more information and userspace
+ utilities.
+
+ To compile this code as a module, choose M here: the module will be
+ called openvswitch.
+
+ If unsure, say N.
+
+config OPENVSWITCH_GRE
+ tristate "Open vSwitch GRE tunneling support"
+ depends on OPENVSWITCH
+ depends on NET_IPGRE
+ default OPENVSWITCH
+ ---help---
+ If you say Y here, then the Open vSwitch will be able create GRE
+ vport.
+
+ Say N to exclude this support and reduce the binary size.
+
+ If unsure, say Y.
+
+config OPENVSWITCH_VXLAN
+ tristate "Open vSwitch VXLAN tunneling support"
+ depends on OPENVSWITCH
+ depends on VXLAN
+ default OPENVSWITCH
+ ---help---
+ If you say Y here, then the Open vSwitch will be able create vxlan vport.
+
+ Say N to exclude this support and reduce the binary size.
+
+ If unsure, say Y.
+
+config OPENVSWITCH_GENEVE
+ tristate "Open vSwitch Geneve tunneling support"
+ depends on OPENVSWITCH
+ depends on GENEVE
+ default OPENVSWITCH
+ ---help---
+ If you say Y here, then the Open vSwitch will be able create geneve vport.
+
+ Say N to exclude this support and reduce the binary size.
diff --git a/net/openvswitch/Makefile b/net/openvswitch/Makefile
new file mode 100644
index 0000000..60f8090
--- /dev/null
+++ b/net/openvswitch/Makefile
@@ -0,0 +1,24 @@
+#
+# Makefile for Open vSwitch.
+#
+
+obj-$(CONFIG_OPENVSWITCH) += openvswitch.o
+
+openvswitch-y := \
+ actions.o \
+ datapath.o \
+ dp_notify.o \
+ flow.o \
+ flow_netlink.o \
+ flow_table.o \
+ vport.o \
+ vport-internal_dev.o \
+ vport-netdev.o
+
+ifneq ($(CONFIG_NF_CONNTRACK),)
+openvswitch-y += conntrack.o
+endif
+
+obj-$(CONFIG_OPENVSWITCH_VXLAN)+= vport-vxlan.o
+obj-$(CONFIG_OPENVSWITCH_GENEVE)+= vport-geneve.o
+obj-$(CONFIG_OPENVSWITCH_GRE) += vport-gre.o
diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c
new file mode 100644
index 0000000..7cb8184
--- /dev/null
+++ b/net/openvswitch/actions.c
@@ -0,0 +1,1187 @@
+/*
+ * Copyright (c) 2007-2014 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/skbuff.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/openvswitch.h>
+#include <linux/netfilter_ipv6.h>
+#include <linux/sctp.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/in6.h>
+#include <linux/if_arp.h>
+#include <linux/if_vlan.h>
+
+#include <net/dst.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/ip6_fib.h>
+#include <net/checksum.h>
+#include <net/dsfield.h>
+#include <net/mpls.h>
+#include <net/sctp/checksum.h>
+
+#include "datapath.h"
+#include "flow.h"
+#include "conntrack.h"
+#include "vport.h"
+
+static int do_execute_actions(struct datapath *dp, struct sk_buff *skb,
+ struct sw_flow_key *key,
+ const struct nlattr *attr, int len);
+
+struct deferred_action {
+ struct sk_buff *skb;
+ const struct nlattr *actions;
+
+ /* Store pkt_key clone when creating deferred action. */
+ struct sw_flow_key pkt_key;
+};
+
+#define MAX_L2_LEN (VLAN_ETH_HLEN + 3 * MPLS_HLEN)
+struct ovs_frag_data {
+ unsigned long dst;
+ struct vport *vport;
+ struct ovs_skb_cb cb;
+ __be16 inner_protocol;
+ __u16 vlan_tci;
+ __be16 vlan_proto;
+ unsigned int l2_len;
+ u8 l2_data[MAX_L2_LEN];
+};
+
+static DEFINE_PER_CPU(struct ovs_frag_data, ovs_frag_data_storage);
+
+#define DEFERRED_ACTION_FIFO_SIZE 10
+struct action_fifo {
+ int head;
+ int tail;
+ /* Deferred action fifo queue storage. */
+ struct deferred_action fifo[DEFERRED_ACTION_FIFO_SIZE];
+};
+
+static struct action_fifo __percpu *action_fifos;
+static DEFINE_PER_CPU(int, exec_actions_level);
+
+static void action_fifo_init(struct action_fifo *fifo)
+{
+ fifo->head = 0;
+ fifo->tail = 0;
+}
+
+static bool action_fifo_is_empty(const struct action_fifo *fifo)
+{
+ return (fifo->head == fifo->tail);
+}
+
+static struct deferred_action *action_fifo_get(struct action_fifo *fifo)
+{
+ if (action_fifo_is_empty(fifo))
+ return NULL;
+
+ return &fifo->fifo[fifo->tail++];
+}
+
+static struct deferred_action *action_fifo_put(struct action_fifo *fifo)
+{
+ if (fifo->head >= DEFERRED_ACTION_FIFO_SIZE - 1)
+ return NULL;
+
+ return &fifo->fifo[fifo->head++];
+}
+
+/* Return true if fifo is not full */
+static struct deferred_action *add_deferred_actions(struct sk_buff *skb,
+ const struct sw_flow_key *key,
+ const struct nlattr *attr)
+{
+ struct action_fifo *fifo;
+ struct deferred_action *da;
+
+ fifo = this_cpu_ptr(action_fifos);
+ da = action_fifo_put(fifo);
+ if (da) {
+ da->skb = skb;
+ da->actions = attr;
+ da->pkt_key = *key;
+ }
+
+ return da;
+}
+
+static void invalidate_flow_key(struct sw_flow_key *key)
+{
+ key->eth.type = htons(0);
+}
+
+static bool is_flow_key_valid(const struct sw_flow_key *key)
+{
+ return !!key->eth.type;
+}
+
+static int push_mpls(struct sk_buff *skb, struct sw_flow_key *key,
+ const struct ovs_action_push_mpls *mpls)
+{
+ __be32 *new_mpls_lse;
+ struct ethhdr *hdr;
+
+ /* Networking stack do not allow simultaneous Tunnel and MPLS GSO. */
+ if (skb->encapsulation)
+ return -ENOTSUPP;
+
+ if (skb_cow_head(skb, MPLS_HLEN) < 0)
+ return -ENOMEM;
+
+ skb_push(skb, MPLS_HLEN);
+ memmove(skb_mac_header(skb) - MPLS_HLEN, skb_mac_header(skb),
+ skb->mac_len);
+ skb_reset_mac_header(skb);
+
+ new_mpls_lse = (__be32 *)skb_mpls_header(skb);
+ *new_mpls_lse = mpls->mpls_lse;
+
+ skb_postpush_rcsum(skb, new_mpls_lse, MPLS_HLEN);
+
+ hdr = eth_hdr(skb);
+ hdr->h_proto = mpls->mpls_ethertype;
+
+ if (!skb->inner_protocol)
+ skb_set_inner_protocol(skb, skb->protocol);
+ skb->protocol = mpls->mpls_ethertype;
+
+ invalidate_flow_key(key);
+ return 0;
+}
+
+static int pop_mpls(struct sk_buff *skb, struct sw_flow_key *key,
+ const __be16 ethertype)
+{
+ struct ethhdr *hdr;
+ int err;
+
+ err = skb_ensure_writable(skb, skb->mac_len + MPLS_HLEN);
+ if (unlikely(err))
+ return err;
+
+ skb_postpull_rcsum(skb, skb_mpls_header(skb), MPLS_HLEN);
+
+ memmove(skb_mac_header(skb) + MPLS_HLEN, skb_mac_header(skb),
+ skb->mac_len);
+
+ __skb_pull(skb, MPLS_HLEN);
+ skb_reset_mac_header(skb);
+
+ /* skb_mpls_header() is used to locate the ethertype
+ * field correctly in the presence of VLAN tags.
+ */
+ hdr = (struct ethhdr *)(skb_mpls_header(skb) - ETH_HLEN);
+ hdr->h_proto = ethertype;
+ if (eth_p_mpls(skb->protocol))
+ skb->protocol = ethertype;
+
+ invalidate_flow_key(key);
+ return 0;
+}
+
+static int set_mpls(struct sk_buff *skb, struct sw_flow_key *flow_key,
+ const __be32 *mpls_lse, const __be32 *mask)
+{
+ __be32 *stack;
+ __be32 lse;
+ int err;
+
+ err = skb_ensure_writable(skb, skb->mac_len + MPLS_HLEN);
+ if (unlikely(err))
+ return err;
+
+ stack = (__be32 *)skb_mpls_header(skb);
+ lse = OVS_MASKED(*stack, *mpls_lse, *mask);
+ if (skb->ip_summed == CHECKSUM_COMPLETE) {
+ __be32 diff[] = { ~(*stack), lse };
+
+ skb->csum = ~csum_partial((char *)diff, sizeof(diff),
+ ~skb->csum);
+ }
+
+ *stack = lse;
+ flow_key->mpls.top_lse = lse;
+ return 0;
+}
+
+static int pop_vlan(struct sk_buff *skb, struct sw_flow_key *key)
+{
+ int err;
+
+ err = skb_vlan_pop(skb);
+ if (skb_vlan_tag_present(skb))
+ invalidate_flow_key(key);
+ else
+ key->eth.tci = 0;
+ return err;
+}
+
+static int push_vlan(struct sk_buff *skb, struct sw_flow_key *key,
+ const struct ovs_action_push_vlan *vlan)
+{
+ if (skb_vlan_tag_present(skb))
+ invalidate_flow_key(key);
+ else
+ key->eth.tci = vlan->vlan_tci;
+ return skb_vlan_push(skb, vlan->vlan_tpid,
+ ntohs(vlan->vlan_tci) & ~VLAN_TAG_PRESENT);
+}
+
+/* 'src' is already properly masked. */
+static void ether_addr_copy_masked(u8 *dst_, const u8 *src_, const u8 *mask_)
+{
+ u16 *dst = (u16 *)dst_;
+ const u16 *src = (const u16 *)src_;
+ const u16 *mask = (const u16 *)mask_;
+
+ OVS_SET_MASKED(dst[0], src[0], mask[0]);
+ OVS_SET_MASKED(dst[1], src[1], mask[1]);
+ OVS_SET_MASKED(dst[2], src[2], mask[2]);
+}
+
+static int set_eth_addr(struct sk_buff *skb, struct sw_flow_key *flow_key,
+ const struct ovs_key_ethernet *key,
+ const struct ovs_key_ethernet *mask)
+{
+ int err;
+
+ err = skb_ensure_writable(skb, ETH_HLEN);
+ if (unlikely(err))
+ return err;
+
+ skb_postpull_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2);
+
+ ether_addr_copy_masked(eth_hdr(skb)->h_source, key->eth_src,
+ mask->eth_src);
+ ether_addr_copy_masked(eth_hdr(skb)->h_dest, key->eth_dst,
+ mask->eth_dst);
+
+ skb_postpush_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2);
+
+ ether_addr_copy(flow_key->eth.src, eth_hdr(skb)->h_source);
+ ether_addr_copy(flow_key->eth.dst, eth_hdr(skb)->h_dest);
+ return 0;
+}
+
+static void update_ip_l4_checksum(struct sk_buff *skb, struct iphdr *nh,
+ __be32 addr, __be32 new_addr)
+{
+ int transport_len = skb->len - skb_transport_offset(skb);
+
+ if (nh->frag_off & htons(IP_OFFSET))
+ return;
+
+ if (nh->protocol == IPPROTO_TCP) {
+ if (likely(transport_len >= sizeof(struct tcphdr)))
+ inet_proto_csum_replace4(&tcp_hdr(skb)->check, skb,
+ addr, new_addr, true);
+ } else if (nh->protocol == IPPROTO_UDP) {
+ if (likely(transport_len >= sizeof(struct udphdr))) {
+ struct udphdr *uh = udp_hdr(skb);
+
+ if (uh->check || skb->ip_summed == CHECKSUM_PARTIAL) {
+ inet_proto_csum_replace4(&uh->check, skb,
+ addr, new_addr, true);
+ if (!uh->check)
+ uh->check = CSUM_MANGLED_0;
+ }
+ }
+ }
+}
+
+static void set_ip_addr(struct sk_buff *skb, struct iphdr *nh,
+ __be32 *addr, __be32 new_addr)
+{
+ update_ip_l4_checksum(skb, nh, *addr, new_addr);
+ csum_replace4(&nh->check, *addr, new_addr);
+ skb_clear_hash(skb);
+ *addr = new_addr;
+}
+
+static void update_ipv6_checksum(struct sk_buff *skb, u8 l4_proto,
+ __be32 addr[4], const __be32 new_addr[4])
+{
+ int transport_len = skb->len - skb_transport_offset(skb);
+
+ if (l4_proto == NEXTHDR_TCP) {
+ if (likely(transport_len >= sizeof(struct tcphdr)))
+ inet_proto_csum_replace16(&tcp_hdr(skb)->check, skb,
+ addr, new_addr, true);
+ } else if (l4_proto == NEXTHDR_UDP) {
+ if (likely(transport_len >= sizeof(struct udphdr))) {
+ struct udphdr *uh = udp_hdr(skb);
+
+ if (uh->check || skb->ip_summed == CHECKSUM_PARTIAL) {
+ inet_proto_csum_replace16(&uh->check, skb,
+ addr, new_addr, true);
+ if (!uh->check)
+ uh->check = CSUM_MANGLED_0;
+ }
+ }
+ } else if (l4_proto == NEXTHDR_ICMP) {
+ if (likely(transport_len >= sizeof(struct icmp6hdr)))
+ inet_proto_csum_replace16(&icmp6_hdr(skb)->icmp6_cksum,
+ skb, addr, new_addr, true);
+ }
+}
+
+static void mask_ipv6_addr(const __be32 old[4], const __be32 addr[4],
+ const __be32 mask[4], __be32 masked[4])
+{
+ masked[0] = OVS_MASKED(old[0], addr[0], mask[0]);
+ masked[1] = OVS_MASKED(old[1], addr[1], mask[1]);
+ masked[2] = OVS_MASKED(old[2], addr[2], mask[2]);
+ masked[3] = OVS_MASKED(old[3], addr[3], mask[3]);
+}
+
+static void set_ipv6_addr(struct sk_buff *skb, u8 l4_proto,
+ __be32 addr[4], const __be32 new_addr[4],
+ bool recalculate_csum)
+{
+ if (recalculate_csum)
+ update_ipv6_checksum(skb, l4_proto, addr, new_addr);
+
+ skb_clear_hash(skb);
+ memcpy(addr, new_addr, sizeof(__be32[4]));
+}
+
+static void set_ipv6_fl(struct ipv6hdr *nh, u32 fl, u32 mask)
+{
+ /* Bits 21-24 are always unmasked, so this retains their values. */
+ OVS_SET_MASKED(nh->flow_lbl[0], (u8)(fl >> 16), (u8)(mask >> 16));
+ OVS_SET_MASKED(nh->flow_lbl[1], (u8)(fl >> 8), (u8)(mask >> 8));
+ OVS_SET_MASKED(nh->flow_lbl[2], (u8)fl, (u8)mask);
+}
+
+static void set_ip_ttl(struct sk_buff *skb, struct iphdr *nh, u8 new_ttl,
+ u8 mask)
+{
+ new_ttl = OVS_MASKED(nh->ttl, new_ttl, mask);
+
+ csum_replace2(&nh->check, htons(nh->ttl << 8), htons(new_ttl << 8));
+ nh->ttl = new_ttl;
+}
+
+static int set_ipv4(struct sk_buff *skb, struct sw_flow_key *flow_key,
+ const struct ovs_key_ipv4 *key,
+ const struct ovs_key_ipv4 *mask)
+{
+ struct iphdr *nh;
+ __be32 new_addr;
+ int err;
+
+ err = skb_ensure_writable(skb, skb_network_offset(skb) +
+ sizeof(struct iphdr));
+ if (unlikely(err))
+ return err;
+
+ nh = ip_hdr(skb);
+
+ /* Setting an IP addresses is typically only a side effect of
+ * matching on them in the current userspace implementation, so it
+ * makes sense to check if the value actually changed.
+ */
+ if (mask->ipv4_src) {
+ new_addr = OVS_MASKED(nh->saddr, key->ipv4_src, mask->ipv4_src);
+
+ if (unlikely(new_addr != nh->saddr)) {
+ set_ip_addr(skb, nh, &nh->saddr, new_addr);
+ flow_key->ipv4.addr.src = new_addr;
+ }
+ }
+ if (mask->ipv4_dst) {
+ new_addr = OVS_MASKED(nh->daddr, key->ipv4_dst, mask->ipv4_dst);
+
+ if (unlikely(new_addr != nh->daddr)) {
+ set_ip_addr(skb, nh, &nh->daddr, new_addr);
+ flow_key->ipv4.addr.dst = new_addr;
+ }
+ }
+ if (mask->ipv4_tos) {
+ ipv4_change_dsfield(nh, ~mask->ipv4_tos, key->ipv4_tos);
+ flow_key->ip.tos = nh->tos;
+ }
+ if (mask->ipv4_ttl) {
+ set_ip_ttl(skb, nh, key->ipv4_ttl, mask->ipv4_ttl);
+ flow_key->ip.ttl = nh->ttl;
+ }
+
+ return 0;
+}
+
+static bool is_ipv6_mask_nonzero(const __be32 addr[4])
+{
+ return !!(addr[0] | addr[1] | addr[2] | addr[3]);
+}
+
+static int set_ipv6(struct sk_buff *skb, struct sw_flow_key *flow_key,
+ const struct ovs_key_ipv6 *key,
+ const struct ovs_key_ipv6 *mask)
+{
+ struct ipv6hdr *nh;
+ int err;
+
+ err = skb_ensure_writable(skb, skb_network_offset(skb) +
+ sizeof(struct ipv6hdr));
+ if (unlikely(err))
+ return err;
+
+ nh = ipv6_hdr(skb);
+
+ /* Setting an IP addresses is typically only a side effect of
+ * matching on them in the current userspace implementation, so it
+ * makes sense to check if the value actually changed.
+ */
+ if (is_ipv6_mask_nonzero(mask->ipv6_src)) {
+ __be32 *saddr = (__be32 *)&nh->saddr;
+ __be32 masked[4];
+
+ mask_ipv6_addr(saddr, key->ipv6_src, mask->ipv6_src, masked);
+
+ if (unlikely(memcmp(saddr, masked, sizeof(masked)))) {
+ set_ipv6_addr(skb, flow_key->ip.proto, saddr, masked,
+ true);
+ memcpy(&flow_key->ipv6.addr.src, masked,
+ sizeof(flow_key->ipv6.addr.src));
+ }
+ }
+ if (is_ipv6_mask_nonzero(mask->ipv6_dst)) {
+ unsigned int offset = 0;
+ int flags = IP6_FH_F_SKIP_RH;
+ bool recalc_csum = true;
+ __be32 *daddr = (__be32 *)&nh->daddr;
+ __be32 masked[4];
+
+ mask_ipv6_addr(daddr, key->ipv6_dst, mask->ipv6_dst, masked);
+
+ if (unlikely(memcmp(daddr, masked, sizeof(masked)))) {
+ if (ipv6_ext_hdr(nh->nexthdr))
+ recalc_csum = (ipv6_find_hdr(skb, &offset,
+ NEXTHDR_ROUTING,
+ NULL, &flags)
+ != NEXTHDR_ROUTING);
+
+ set_ipv6_addr(skb, flow_key->ip.proto, daddr, masked,
+ recalc_csum);
+ memcpy(&flow_key->ipv6.addr.dst, masked,
+ sizeof(flow_key->ipv6.addr.dst));
+ }
+ }
+ if (mask->ipv6_tclass) {
+ ipv6_change_dsfield(nh, ~mask->ipv6_tclass, key->ipv6_tclass);
+ flow_key->ip.tos = ipv6_get_dsfield(nh);
+ }
+ if (mask->ipv6_label) {
+ set_ipv6_fl(nh, ntohl(key->ipv6_label),
+ ntohl(mask->ipv6_label));
+ flow_key->ipv6.label =
+ *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL);
+ }
+ if (mask->ipv6_hlimit) {
+ OVS_SET_MASKED(nh->hop_limit, key->ipv6_hlimit,
+ mask->ipv6_hlimit);
+ flow_key->ip.ttl = nh->hop_limit;
+ }
+ return 0;
+}
+
+/* Must follow skb_ensure_writable() since that can move the skb data. */
+static void set_tp_port(struct sk_buff *skb, __be16 *port,
+ __be16 new_port, __sum16 *check)
+{
+ inet_proto_csum_replace2(check, skb, *port, new_port, false);
+ *port = new_port;
+}
+
+static int set_udp(struct sk_buff *skb, struct sw_flow_key *flow_key,
+ const struct ovs_key_udp *key,
+ const struct ovs_key_udp *mask)
+{
+ struct udphdr *uh;
+ __be16 src, dst;
+ int err;
+
+ err = skb_ensure_writable(skb, skb_transport_offset(skb) +
+ sizeof(struct udphdr));
+ if (unlikely(err))
+ return err;
+
+ uh = udp_hdr(skb);
+ /* Either of the masks is non-zero, so do not bother checking them. */
+ src = OVS_MASKED(uh->source, key->udp_src, mask->udp_src);
+ dst = OVS_MASKED(uh->dest, key->udp_dst, mask->udp_dst);
+
+ if (uh->check && skb->ip_summed != CHECKSUM_PARTIAL) {
+ if (likely(src != uh->source)) {
+ set_tp_port(skb, &uh->source, src, &uh->check);
+ flow_key->tp.src = src;
+ }
+ if (likely(dst != uh->dest)) {
+ set_tp_port(skb, &uh->dest, dst, &uh->check);
+ flow_key->tp.dst = dst;
+ }
+
+ if (unlikely(!uh->check))
+ uh->check = CSUM_MANGLED_0;
+ } else {
+ uh->source = src;
+ uh->dest = dst;
+ flow_key->tp.src = src;
+ flow_key->tp.dst = dst;
+ }
+
+ skb_clear_hash(skb);
+
+ return 0;
+}
+
+static int set_tcp(struct sk_buff *skb, struct sw_flow_key *flow_key,
+ const struct ovs_key_tcp *key,
+ const struct ovs_key_tcp *mask)
+{
+ struct tcphdr *th;
+ __be16 src, dst;
+ int err;
+
+ err = skb_ensure_writable(skb, skb_transport_offset(skb) +
+ sizeof(struct tcphdr));
+ if (unlikely(err))
+ return err;
+
+ th = tcp_hdr(skb);
+ src = OVS_MASKED(th->source, key->tcp_src, mask->tcp_src);
+ if (likely(src != th->source)) {
+ set_tp_port(skb, &th->source, src, &th->check);
+ flow_key->tp.src = src;
+ }
+ dst = OVS_MASKED(th->dest, key->tcp_dst, mask->tcp_dst);
+ if (likely(dst != th->dest)) {
+ set_tp_port(skb, &th->dest, dst, &th->check);
+ flow_key->tp.dst = dst;
+ }
+ skb_clear_hash(skb);
+
+ return 0;
+}
+
+static int set_sctp(struct sk_buff *skb, struct sw_flow_key *flow_key,
+ const struct ovs_key_sctp *key,
+ const struct ovs_key_sctp *mask)
+{
+ unsigned int sctphoff = skb_transport_offset(skb);
+ struct sctphdr *sh;
+ __le32 old_correct_csum, new_csum, old_csum;
+ int err;
+
+ err = skb_ensure_writable(skb, sctphoff + sizeof(struct sctphdr));
+ if (unlikely(err))
+ return err;
+
+ sh = sctp_hdr(skb);
+ old_csum = sh->checksum;
+ old_correct_csum = sctp_compute_cksum(skb, sctphoff);
+
+ sh->source = OVS_MASKED(sh->source, key->sctp_src, mask->sctp_src);
+ sh->dest = OVS_MASKED(sh->dest, key->sctp_dst, mask->sctp_dst);
+
+ new_csum = sctp_compute_cksum(skb, sctphoff);
+
+ /* Carry any checksum errors through. */
+ sh->checksum = old_csum ^ old_correct_csum ^ new_csum;
+
+ skb_clear_hash(skb);
+ flow_key->tp.src = sh->source;
+ flow_key->tp.dst = sh->dest;
+
+ return 0;
+}
+
+static int ovs_vport_output(struct net *net, struct sock *sk, struct sk_buff *skb)
+{
+ struct ovs_frag_data *data = this_cpu_ptr(&ovs_frag_data_storage);
+ struct vport *vport = data->vport;
+
+ if (skb_cow_head(skb, data->l2_len) < 0) {
+ kfree_skb(skb);
+ return -ENOMEM;
+ }
+
+ __skb_dst_copy(skb, data->dst);
+ *OVS_CB(skb) = data->cb;
+ skb->inner_protocol = data->inner_protocol;
+ skb->vlan_tci = data->vlan_tci;
+ skb->vlan_proto = data->vlan_proto;
+
+ /* Reconstruct the MAC header. */
+ skb_push(skb, data->l2_len);
+ memcpy(skb->data, &data->l2_data, data->l2_len);
+ skb_postpush_rcsum(skb, skb->data, data->l2_len);
+ skb_reset_mac_header(skb);
+
+ ovs_vport_send(vport, skb);
+ return 0;
+}
+
+static unsigned int
+ovs_dst_get_mtu(const struct dst_entry *dst)
+{
+ return dst->dev->mtu;
+}
+
+static struct dst_ops ovs_dst_ops = {
+ .family = AF_UNSPEC,
+ .mtu = ovs_dst_get_mtu,
+};
+
+/* prepare_frag() is called once per (larger-than-MTU) frame; its inverse is
+ * ovs_vport_output(), which is called once per fragmented packet.
+ */
+static void prepare_frag(struct vport *vport, struct sk_buff *skb)
+{
+ unsigned int hlen = skb_network_offset(skb);
+ struct ovs_frag_data *data;
+
+ data = this_cpu_ptr(&ovs_frag_data_storage);
+ data->dst = skb->_skb_refdst;
+ data->vport = vport;
+ data->cb = *OVS_CB(skb);
+ data->inner_protocol = skb->inner_protocol;
+ data->vlan_tci = skb->vlan_tci;
+ data->vlan_proto = skb->vlan_proto;
+ data->l2_len = hlen;
+ memcpy(&data->l2_data, skb->data, hlen);
+
+ memset(IPCB(skb), 0, sizeof(struct inet_skb_parm));
+ skb_pull(skb, hlen);
+}
+
+static void ovs_fragment(struct net *net, struct vport *vport,
+ struct sk_buff *skb, u16 mru, __be16 ethertype)
+{
+ if (skb_network_offset(skb) > MAX_L2_LEN) {
+ OVS_NLERR(1, "L2 header too long to fragment");
+ goto err;
+ }
+
+ if (ethertype == htons(ETH_P_IP)) {
+ struct dst_entry ovs_dst;
+ unsigned long orig_dst;
+
+ prepare_frag(vport, skb);
+ dst_init(&ovs_dst, &ovs_dst_ops, NULL, 1,
+ DST_OBSOLETE_NONE, DST_NOCOUNT);
+ ovs_dst.dev = vport->dev;
+
+ orig_dst = skb->_skb_refdst;
+ skb_dst_set_noref(skb, &ovs_dst);
+ IPCB(skb)->frag_max_size = mru;
+
+ ip_do_fragment(net, skb->sk, skb, ovs_vport_output);
+ refdst_drop(orig_dst);
+ } else if (ethertype == htons(ETH_P_IPV6)) {
+ const struct nf_ipv6_ops *v6ops = nf_get_ipv6_ops();
+ unsigned long orig_dst;
+ struct rt6_info ovs_rt;
+
+ if (!v6ops) {
+ goto err;
+ }
+
+ prepare_frag(vport, skb);
+ memset(&ovs_rt, 0, sizeof(ovs_rt));
+ dst_init(&ovs_rt.dst, &ovs_dst_ops, NULL, 1,
+ DST_OBSOLETE_NONE, DST_NOCOUNT);
+ ovs_rt.dst.dev = vport->dev;
+
+ orig_dst = skb->_skb_refdst;
+ skb_dst_set_noref(skb, &ovs_rt.dst);
+ IP6CB(skb)->frag_max_size = mru;
+
+ v6ops->fragment(net, skb->sk, skb, ovs_vport_output);
+ refdst_drop(orig_dst);
+ } else {
+ WARN_ONCE(1, "Failed fragment ->%s: eth=%04x, MRU=%d, MTU=%d.",
+ ovs_vport_name(vport), ntohs(ethertype), mru,
+ vport->dev->mtu);
+ goto err;
+ }
+
+ return;
+err:
+ kfree_skb(skb);
+}
+
+static void do_output(struct datapath *dp, struct sk_buff *skb, int out_port,
+ struct sw_flow_key *key)
+{
+ struct vport *vport = ovs_vport_rcu(dp, out_port);
+
+ if (likely(vport)) {
+ u16 mru = OVS_CB(skb)->mru;
+
+ if (likely(!mru || (skb->len <= mru + ETH_HLEN))) {
+ ovs_vport_send(vport, skb);
+ } else if (mru <= vport->dev->mtu) {
+ struct net *net = read_pnet(&dp->net);
+ __be16 ethertype = key->eth.type;
+
+ if (!is_flow_key_valid(key)) {
+ if (eth_p_mpls(skb->protocol))
+ ethertype = skb->inner_protocol;
+ else
+ ethertype = vlan_get_protocol(skb);
+ }
+
+ ovs_fragment(net, vport, skb, mru, ethertype);
+ } else {
+ kfree_skb(skb);
+ }
+ } else {
+ kfree_skb(skb);
+ }
+}
+
+static int output_userspace(struct datapath *dp, struct sk_buff *skb,
+ struct sw_flow_key *key, const struct nlattr *attr,
+ const struct nlattr *actions, int actions_len)
+{
+ struct dp_upcall_info upcall;
+ const struct nlattr *a;
+ int rem;
+
+ memset(&upcall, 0, sizeof(upcall));
+ upcall.cmd = OVS_PACKET_CMD_ACTION;
+ upcall.mru = OVS_CB(skb)->mru;
+
+ for (a = nla_data(attr), rem = nla_len(attr); rem > 0;
+ a = nla_next(a, &rem)) {
+ switch (nla_type(a)) {
+ case OVS_USERSPACE_ATTR_USERDATA:
+ upcall.userdata = a;
+ break;
+
+ case OVS_USERSPACE_ATTR_PID:
+ upcall.portid = nla_get_u32(a);
+ break;
+
+ case OVS_USERSPACE_ATTR_EGRESS_TUN_PORT: {
+ /* Get out tunnel info. */
+ struct vport *vport;
+
+ vport = ovs_vport_rcu(dp, nla_get_u32(a));
+ if (vport) {
+ int err;
+
+ err = dev_fill_metadata_dst(vport->dev, skb);
+ if (!err)
+ upcall.egress_tun_info = skb_tunnel_info(skb);
+ }
+
+ break;
+ }
+
+ case OVS_USERSPACE_ATTR_ACTIONS: {
+ /* Include actions. */
+ upcall.actions = actions;
+ upcall.actions_len = actions_len;
+ break;
+ }
+
+ } /* End of switch. */
+ }
+
+ return ovs_dp_upcall(dp, skb, key, &upcall);
+}
+
+static int sample(struct datapath *dp, struct sk_buff *skb,
+ struct sw_flow_key *key, const struct nlattr *attr,
+ const struct nlattr *actions, int actions_len)
+{
+ const struct nlattr *acts_list = NULL;
+ const struct nlattr *a;
+ int rem;
+
+ for (a = nla_data(attr), rem = nla_len(attr); rem > 0;
+ a = nla_next(a, &rem)) {
+ u32 probability;
+
+ switch (nla_type(a)) {
+ case OVS_SAMPLE_ATTR_PROBABILITY:
+ probability = nla_get_u32(a);
+ if (!probability || prandom_u32() > probability)
+ return 0;
+ break;
+
+ case OVS_SAMPLE_ATTR_ACTIONS:
+ acts_list = a;
+ break;
+ }
+ }
+
+ rem = nla_len(acts_list);
+ a = nla_data(acts_list);
+
+ /* Actions list is empty, do nothing */
+ if (unlikely(!rem))
+ return 0;
+
+ /* The only known usage of sample action is having a single user-space
+ * action. Treat this usage as a special case.
+ * The output_userspace() should clone the skb to be sent to the
+ * user space. This skb will be consumed by its caller.
+ */
+ if (likely(nla_type(a) == OVS_ACTION_ATTR_USERSPACE &&
+ nla_is_last(a, rem)))
+ return output_userspace(dp, skb, key, a, actions, actions_len);
+
+ skb = skb_clone(skb, GFP_ATOMIC);
+ if (!skb)
+ /* Skip the sample action when out of memory. */
+ return 0;
+
+ if (!add_deferred_actions(skb, key, a)) {
+ if (net_ratelimit())
+ pr_warn("%s: deferred actions limit reached, dropping sample action\n",
+ ovs_dp_name(dp));
+
+ kfree_skb(skb);
+ }
+ return 0;
+}
+
+static void execute_hash(struct sk_buff *skb, struct sw_flow_key *key,
+ const struct nlattr *attr)
+{
+ struct ovs_action_hash *hash_act = nla_data(attr);
+ u32 hash = 0;
+
+ /* OVS_HASH_ALG_L4 is the only possible hash algorithm. */
+ hash = skb_get_hash(skb);
+ hash = jhash_1word(hash, hash_act->hash_basis);
+ if (!hash)
+ hash = 0x1;
+
+ key->ovs_flow_hash = hash;
+}
+
+static int execute_set_action(struct sk_buff *skb,
+ struct sw_flow_key *flow_key,
+ const struct nlattr *a)
+{
+ /* Only tunnel set execution is supported without a mask. */
+ if (nla_type(a) == OVS_KEY_ATTR_TUNNEL_INFO) {
+ struct ovs_tunnel_info *tun = nla_data(a);
+
+ skb_dst_drop(skb);
+ dst_hold((struct dst_entry *)tun->tun_dst);
+ skb_dst_set(skb, (struct dst_entry *)tun->tun_dst);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+/* Mask is at the midpoint of the data. */
+#define get_mask(a, type) ((const type)nla_data(a) + 1)
+
+static int execute_masked_set_action(struct sk_buff *skb,
+ struct sw_flow_key *flow_key,
+ const struct nlattr *a)
+{
+ int err = 0;
+
+ switch (nla_type(a)) {
+ case OVS_KEY_ATTR_PRIORITY:
+ OVS_SET_MASKED(skb->priority, nla_get_u32(a),
+ *get_mask(a, u32 *));
+ flow_key->phy.priority = skb->priority;
+ break;
+
+ case OVS_KEY_ATTR_SKB_MARK:
+ OVS_SET_MASKED(skb->mark, nla_get_u32(a), *get_mask(a, u32 *));
+ flow_key->phy.skb_mark = skb->mark;
+ break;
+
+ case OVS_KEY_ATTR_TUNNEL_INFO:
+ /* Masked data not supported for tunnel. */
+ err = -EINVAL;
+ break;
+
+ case OVS_KEY_ATTR_ETHERNET:
+ err = set_eth_addr(skb, flow_key, nla_data(a),
+ get_mask(a, struct ovs_key_ethernet *));
+ break;
+
+ case OVS_KEY_ATTR_IPV4:
+ err = set_ipv4(skb, flow_key, nla_data(a),
+ get_mask(a, struct ovs_key_ipv4 *));
+ break;
+
+ case OVS_KEY_ATTR_IPV6:
+ err = set_ipv6(skb, flow_key, nla_data(a),
+ get_mask(a, struct ovs_key_ipv6 *));
+ break;
+
+ case OVS_KEY_ATTR_TCP:
+ err = set_tcp(skb, flow_key, nla_data(a),
+ get_mask(a, struct ovs_key_tcp *));
+ break;
+
+ case OVS_KEY_ATTR_UDP:
+ err = set_udp(skb, flow_key, nla_data(a),
+ get_mask(a, struct ovs_key_udp *));
+ break;
+
+ case OVS_KEY_ATTR_SCTP:
+ err = set_sctp(skb, flow_key, nla_data(a),
+ get_mask(a, struct ovs_key_sctp *));
+ break;
+
+ case OVS_KEY_ATTR_MPLS:
+ err = set_mpls(skb, flow_key, nla_data(a), get_mask(a,
+ __be32 *));
+ break;
+
+ case OVS_KEY_ATTR_CT_STATE:
+ case OVS_KEY_ATTR_CT_ZONE:
+ case OVS_KEY_ATTR_CT_MARK:
+ case OVS_KEY_ATTR_CT_LABELS:
+ err = -EINVAL;
+ break;
+ }
+
+ return err;
+}
+
+static int execute_recirc(struct datapath *dp, struct sk_buff *skb,
+ struct sw_flow_key *key,
+ const struct nlattr *a, int rem)
+{
+ struct deferred_action *da;
+
+ if (!is_flow_key_valid(key)) {
+ int err;
+
+ err = ovs_flow_key_update(skb, key);
+ if (err)
+ return err;
+ }
+ BUG_ON(!is_flow_key_valid(key));
+
+ if (!nla_is_last(a, rem)) {
+ /* Recirc action is the not the last action
+ * of the action list, need to clone the skb.
+ */
+ skb = skb_clone(skb, GFP_ATOMIC);
+
+ /* Skip the recirc action when out of memory, but
+ * continue on with the rest of the action list.
+ */
+ if (!skb)
+ return 0;
+ }
+
+ da = add_deferred_actions(skb, key, NULL);
+ if (da) {
+ da->pkt_key.recirc_id = nla_get_u32(a);
+ } else {
+ kfree_skb(skb);
+
+ if (net_ratelimit())
+ pr_warn("%s: deferred action limit reached, drop recirc action\n",
+ ovs_dp_name(dp));
+ }
+
+ return 0;
+}
+
+/* Execute a list of actions against 'skb'. */
+static int do_execute_actions(struct datapath *dp, struct sk_buff *skb,
+ struct sw_flow_key *key,
+ const struct nlattr *attr, int len)
+{
+ /* Every output action needs a separate clone of 'skb', but the common
+ * case is just a single output action, so that doing a clone and
+ * then freeing the original skbuff is wasteful. So the following code
+ * is slightly obscure just to avoid that.
+ */
+ int prev_port = -1;
+ const struct nlattr *a;
+ int rem;
+
+ for (a = attr, rem = len; rem > 0;
+ a = nla_next(a, &rem)) {
+ int err = 0;
+
+ if (unlikely(prev_port != -1)) {
+ struct sk_buff *out_skb = skb_clone(skb, GFP_ATOMIC);
+
+ if (out_skb)
+ do_output(dp, out_skb, prev_port, key);
+
+ prev_port = -1;
+ }
+
+ switch (nla_type(a)) {
+ case OVS_ACTION_ATTR_OUTPUT:
+ prev_port = nla_get_u32(a);
+ break;
+
+ case OVS_ACTION_ATTR_USERSPACE:
+ output_userspace(dp, skb, key, a, attr, len);
+ break;
+
+ case OVS_ACTION_ATTR_HASH:
+ execute_hash(skb, key, a);
+ break;
+
+ case OVS_ACTION_ATTR_PUSH_MPLS:
+ err = push_mpls(skb, key, nla_data(a));
+ break;
+
+ case OVS_ACTION_ATTR_POP_MPLS:
+ err = pop_mpls(skb, key, nla_get_be16(a));
+ break;
+
+ case OVS_ACTION_ATTR_PUSH_VLAN:
+ err = push_vlan(skb, key, nla_data(a));
+ break;
+
+ case OVS_ACTION_ATTR_POP_VLAN:
+ err = pop_vlan(skb, key);
+ break;
+
+ case OVS_ACTION_ATTR_RECIRC:
+ err = execute_recirc(dp, skb, key, a, rem);
+ if (nla_is_last(a, rem)) {
+ /* If this is the last action, the skb has
+ * been consumed or freed.
+ * Return immediately.
+ */
+ return err;
+ }
+ break;
+
+ case OVS_ACTION_ATTR_SET:
+ err = execute_set_action(skb, key, nla_data(a));
+ break;
+
+ case OVS_ACTION_ATTR_SET_MASKED:
+ case OVS_ACTION_ATTR_SET_TO_MASKED:
+ err = execute_masked_set_action(skb, key, nla_data(a));
+ break;
+
+ case OVS_ACTION_ATTR_SAMPLE:
+ err = sample(dp, skb, key, a, attr, len);
+ break;
+
+ case OVS_ACTION_ATTR_CT:
+ if (!is_flow_key_valid(key)) {
+ err = ovs_flow_key_update(skb, key);
+ if (err)
+ return err;
+ }
+
+ err = ovs_ct_execute(ovs_dp_get_net(dp), skb, key,
+ nla_data(a));
+
+ /* Hide stolen IP fragments from user space. */
+ if (err)
+ return err == -EINPROGRESS ? 0 : err;
+ break;
+ }
+
+ if (unlikely(err)) {
+ kfree_skb(skb);
+ return err;
+ }
+ }
+
+ if (prev_port != -1)
+ do_output(dp, skb, prev_port, key);
+ else
+ consume_skb(skb);
+
+ return 0;
+}
+
+static void process_deferred_actions(struct datapath *dp)
+{
+ struct action_fifo *fifo = this_cpu_ptr(action_fifos);
+
+ /* Do not touch the FIFO in case there is no deferred actions. */
+ if (action_fifo_is_empty(fifo))
+ return;
+
+ /* Finishing executing all deferred actions. */
+ do {
+ struct deferred_action *da = action_fifo_get(fifo);
+ struct sk_buff *skb = da->skb;
+ struct sw_flow_key *key = &da->pkt_key;
+ const struct nlattr *actions = da->actions;
+
+ if (actions)
+ do_execute_actions(dp, skb, key, actions,
+ nla_len(actions));
+ else
+ ovs_dp_process_packet(skb, key);
+ } while (!action_fifo_is_empty(fifo));
+
+ /* Reset FIFO for the next packet. */
+ action_fifo_init(fifo);
+}
+
+/* Execute a list of actions against 'skb'. */
+int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb,
+ const struct sw_flow_actions *acts,
+ struct sw_flow_key *key)
+{
+ int level = this_cpu_read(exec_actions_level);
+ int err;
+
+ this_cpu_inc(exec_actions_level);
+ err = do_execute_actions(dp, skb, key,
+ acts->actions, acts->actions_len);
+
+ if (!level)
+ process_deferred_actions(dp);
+
+ this_cpu_dec(exec_actions_level);
+ return err;
+}
+
+int action_fifos_init(void)
+{
+ action_fifos = alloc_percpu(struct action_fifo);
+ if (!action_fifos)
+ return -ENOMEM;
+
+ return 0;
+}
+
+void action_fifos_exit(void)
+{
+ free_percpu(action_fifos);
+}
diff --git a/net/openvswitch/conntrack.c b/net/openvswitch/conntrack.c
new file mode 100644
index 0000000..6a2507f
--- /dev/null
+++ b/net/openvswitch/conntrack.c
@@ -0,0 +1,794 @@
+/*
+ * Copyright (c) 2015 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/openvswitch.h>
+#include <net/ip.h>
+#include <net/netfilter/nf_conntrack_core.h>
+#include <net/netfilter/nf_conntrack_helper.h>
+#include <net/netfilter/nf_conntrack_labels.h>
+#include <net/netfilter/nf_conntrack_zones.h>
+#include <net/netfilter/ipv6/nf_defrag_ipv6.h>
+
+#include "datapath.h"
+#include "conntrack.h"
+#include "flow.h"
+#include "flow_netlink.h"
+
+struct ovs_ct_len_tbl {
+ size_t maxlen;
+ size_t minlen;
+};
+
+/* Metadata mark for masked write to conntrack mark */
+struct md_mark {
+ u32 value;
+ u32 mask;
+};
+
+/* Metadata label for masked write to conntrack label. */
+struct md_labels {
+ struct ovs_key_ct_labels value;
+ struct ovs_key_ct_labels mask;
+};
+
+/* Conntrack action context for execution. */
+struct ovs_conntrack_info {
+ struct nf_conntrack_helper *helper;
+ struct nf_conntrack_zone zone;
+ struct nf_conn *ct;
+ u8 commit : 1;
+ u16 family;
+ struct md_mark mark;
+ struct md_labels labels;
+};
+
+static void __ovs_ct_free_action(struct ovs_conntrack_info *ct_info);
+
+static u16 key_to_nfproto(const struct sw_flow_key *key)
+{
+ switch (ntohs(key->eth.type)) {
+ case ETH_P_IP:
+ return NFPROTO_IPV4;
+ case ETH_P_IPV6:
+ return NFPROTO_IPV6;
+ default:
+ return NFPROTO_UNSPEC;
+ }
+}
+
+/* Map SKB connection state into the values used by flow definition. */
+static u8 ovs_ct_get_state(enum ip_conntrack_info ctinfo)
+{
+ u8 ct_state = OVS_CS_F_TRACKED;
+
+ switch (ctinfo) {
+ case IP_CT_ESTABLISHED_REPLY:
+ case IP_CT_RELATED_REPLY:
+ case IP_CT_NEW_REPLY:
+ ct_state |= OVS_CS_F_REPLY_DIR;
+ break;
+ default:
+ break;
+ }
+
+ switch (ctinfo) {
+ case IP_CT_ESTABLISHED:
+ case IP_CT_ESTABLISHED_REPLY:
+ ct_state |= OVS_CS_F_ESTABLISHED;
+ break;
+ case IP_CT_RELATED:
+ case IP_CT_RELATED_REPLY:
+ ct_state |= OVS_CS_F_RELATED;
+ break;
+ case IP_CT_NEW:
+ case IP_CT_NEW_REPLY:
+ ct_state |= OVS_CS_F_NEW;
+ break;
+ default:
+ break;
+ }
+
+ return ct_state;
+}
+
+static u32 ovs_ct_get_mark(const struct nf_conn *ct)
+{
+#if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)
+ return ct ? ct->mark : 0;
+#else
+ return 0;
+#endif
+}
+
+static void ovs_ct_get_labels(const struct nf_conn *ct,
+ struct ovs_key_ct_labels *labels)
+{
+ struct nf_conn_labels *cl = ct ? nf_ct_labels_find(ct) : NULL;
+
+ if (cl) {
+ size_t len = cl->words * sizeof(long);
+
+ if (len > OVS_CT_LABELS_LEN)
+ len = OVS_CT_LABELS_LEN;
+ else if (len < OVS_CT_LABELS_LEN)
+ memset(labels, 0, OVS_CT_LABELS_LEN);
+ memcpy(labels, cl->bits, len);
+ } else {
+ memset(labels, 0, OVS_CT_LABELS_LEN);
+ }
+}
+
+static void __ovs_ct_update_key(struct sw_flow_key *key, u8 state,
+ const struct nf_conntrack_zone *zone,
+ const struct nf_conn *ct)
+{
+ key->ct.state = state;
+ key->ct.zone = zone->id;
+ key->ct.mark = ovs_ct_get_mark(ct);
+ ovs_ct_get_labels(ct, &key->ct.labels);
+}
+
+/* Update 'key' based on skb->nfct. If 'post_ct' is true, then OVS has
+ * previously sent the packet to conntrack via the ct action.
+ */
+static void ovs_ct_update_key(const struct sk_buff *skb,
+ const struct ovs_conntrack_info *info,
+ struct sw_flow_key *key, bool post_ct)
+{
+ const struct nf_conntrack_zone *zone = &nf_ct_zone_dflt;
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct;
+ u8 state = 0;
+
+ ct = nf_ct_get(skb, &ctinfo);
+ if (ct) {
+ state = ovs_ct_get_state(ctinfo);
+ if (!nf_ct_is_confirmed(ct))
+ state |= OVS_CS_F_NEW;
+ if (ct->master)
+ state |= OVS_CS_F_RELATED;
+ zone = nf_ct_zone(ct);
+ } else if (post_ct) {
+ state = OVS_CS_F_TRACKED | OVS_CS_F_INVALID;
+ if (info)
+ zone = &info->zone;
+ }
+ __ovs_ct_update_key(key, state, zone, ct);
+}
+
+void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key)
+{
+ ovs_ct_update_key(skb, NULL, key, false);
+}
+
+int ovs_ct_put_key(const struct sw_flow_key *key, struct sk_buff *skb)
+{
+ if (nla_put_u32(skb, OVS_KEY_ATTR_CT_STATE, key->ct.state))
+ return -EMSGSIZE;
+
+ if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
+ nla_put_u16(skb, OVS_KEY_ATTR_CT_ZONE, key->ct.zone))
+ return -EMSGSIZE;
+
+ if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
+ nla_put_u32(skb, OVS_KEY_ATTR_CT_MARK, key->ct.mark))
+ return -EMSGSIZE;
+
+ if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
+ nla_put(skb, OVS_KEY_ATTR_CT_LABELS, sizeof(key->ct.labels),
+ &key->ct.labels))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+static int ovs_ct_set_mark(struct sk_buff *skb, struct sw_flow_key *key,
+ u32 ct_mark, u32 mask)
+{
+#if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct;
+ u32 new_mark;
+
+
+ /* The connection could be invalid, in which case set_mark is no-op. */
+ ct = nf_ct_get(skb, &ctinfo);
+ if (!ct)
+ return 0;
+
+ new_mark = ct_mark | (ct->mark & ~(mask));
+ if (ct->mark != new_mark) {
+ ct->mark = new_mark;
+ nf_conntrack_event_cache(IPCT_MARK, ct);
+ key->ct.mark = new_mark;
+ }
+
+ return 0;
+#else
+ return -ENOTSUPP;
+#endif
+}
+
+static int ovs_ct_set_labels(struct sk_buff *skb, struct sw_flow_key *key,
+ const struct ovs_key_ct_labels *labels,
+ const struct ovs_key_ct_labels *mask)
+{
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn_labels *cl;
+ struct nf_conn *ct;
+ int err;
+
+ /* The connection could be invalid, in which case set_label is no-op.*/
+ ct = nf_ct_get(skb, &ctinfo);
+ if (!ct)
+ return 0;
+
+ cl = nf_ct_labels_find(ct);
+ if (!cl) {
+ nf_ct_labels_ext_add(ct);
+ cl = nf_ct_labels_find(ct);
+ }
+ if (!cl || cl->words * sizeof(long) < OVS_CT_LABELS_LEN)
+ return -ENOSPC;
+
+ err = nf_connlabels_replace(ct, (u32 *)labels, (u32 *)mask,
+ OVS_CT_LABELS_LEN / sizeof(u32));
+ if (err)
+ return err;
+
+ ovs_ct_get_labels(ct, &key->ct.labels);
+ return 0;
+}
+
+/* 'skb' should already be pulled to nh_ofs. */
+static int ovs_ct_helper(struct sk_buff *skb, u16 proto)
+{
+ const struct nf_conntrack_helper *helper;
+ const struct nf_conn_help *help;
+ enum ip_conntrack_info ctinfo;
+ unsigned int protoff;
+ struct nf_conn *ct;
+
+ ct = nf_ct_get(skb, &ctinfo);
+ if (!ct || ctinfo == IP_CT_RELATED_REPLY)
+ return NF_ACCEPT;
+
+ help = nfct_help(ct);
+ if (!help)
+ return NF_ACCEPT;
+
+ helper = rcu_dereference(help->helper);
+ if (!helper)
+ return NF_ACCEPT;
+
+ switch (proto) {
+ case NFPROTO_IPV4:
+ protoff = ip_hdrlen(skb);
+ break;
+ case NFPROTO_IPV6: {
+ u8 nexthdr = ipv6_hdr(skb)->nexthdr;
+ __be16 frag_off;
+ int ofs;
+
+ ofs = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &nexthdr,
+ &frag_off);
+ if (ofs < 0 || (frag_off & htons(~0x7)) != 0) {
+ pr_debug("proto header not found\n");
+ return NF_ACCEPT;
+ }
+ protoff = ofs;
+ break;
+ }
+ default:
+ WARN_ONCE(1, "helper invoked on non-IP family!");
+ return NF_DROP;
+ }
+
+ return helper->help(skb, protoff, ct, ctinfo);
+}
+
+/* Returns 0 on success, -EINPROGRESS if 'skb' is stolen, or other nonzero
+ * value if 'skb' is freed.
+ */
+static int handle_fragments(struct net *net, struct sw_flow_key *key,
+ u16 zone, struct sk_buff *skb)
+{
+ struct ovs_skb_cb ovs_cb = *OVS_CB(skb);
+
+ if (key->eth.type == htons(ETH_P_IP)) {
+ enum ip_defrag_users user = IP_DEFRAG_CONNTRACK_IN + zone;
+ int err;
+
+ memset(IPCB(skb), 0, sizeof(struct inet_skb_parm));
+ err = ip_defrag(net, skb, user);
+ if (err)
+ return err;
+
+ ovs_cb.mru = IPCB(skb)->frag_max_size;
+#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
+ } else if (key->eth.type == htons(ETH_P_IPV6)) {
+ enum ip6_defrag_users user = IP6_DEFRAG_CONNTRACK_IN + zone;
+ struct sk_buff *reasm;
+
+ memset(IP6CB(skb), 0, sizeof(struct inet6_skb_parm));
+ reasm = nf_ct_frag6_gather(net, skb, user);
+ if (!reasm)
+ return -EINPROGRESS;
+
+ if (skb == reasm) {
+ kfree_skb(skb);
+ return -EINVAL;
+ }
+
+ /* Don't free 'skb' even though it is one of the original
+ * fragments, as we're going to morph it into the head.
+ */
+ skb_get(skb);
+ nf_ct_frag6_consume_orig(reasm);
+
+ key->ip.proto = ipv6_hdr(reasm)->nexthdr;
+ skb_morph(skb, reasm);
+ skb->next = reasm->next;
+ consume_skb(reasm);
+ ovs_cb.mru = IP6CB(skb)->frag_max_size;
+#endif
+ } else {
+ kfree_skb(skb);
+ return -EPFNOSUPPORT;
+ }
+
+ key->ip.frag = OVS_FRAG_TYPE_NONE;
+ skb_clear_hash(skb);
+ skb->ignore_df = 1;
+ *OVS_CB(skb) = ovs_cb;
+
+ return 0;
+}
+
+static struct nf_conntrack_expect *
+ovs_ct_expect_find(struct net *net, const struct nf_conntrack_zone *zone,
+ u16 proto, const struct sk_buff *skb)
+{
+ struct nf_conntrack_tuple tuple;
+
+ if (!nf_ct_get_tuplepr(skb, skb_network_offset(skb), proto, net, &tuple))
+ return NULL;
+ return __nf_ct_expect_find(net, zone, &tuple);
+}
+
+/* Determine whether skb->nfct is equal to the result of conntrack lookup. */
+static bool skb_nfct_cached(const struct net *net, const struct sk_buff *skb,
+ const struct ovs_conntrack_info *info)
+{
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct;
+
+ ct = nf_ct_get(skb, &ctinfo);
+ if (!ct)
+ return false;
+ if (!net_eq(net, read_pnet(&ct->ct_net)))
+ return false;
+ if (!nf_ct_zone_equal_any(info->ct, nf_ct_zone(ct)))
+ return false;
+ if (info->helper) {
+ struct nf_conn_help *help;
+
+ help = nf_ct_ext_find(ct, NF_CT_EXT_HELPER);
+ if (help && rcu_access_pointer(help->helper) != info->helper)
+ return false;
+ }
+
+ return true;
+}
+
+static int __ovs_ct_lookup(struct net *net, struct sw_flow_key *key,
+ const struct ovs_conntrack_info *info,
+ struct sk_buff *skb)
+{
+ /* If we are recirculating packets to match on conntrack fields and
+ * committing with a separate conntrack action, then we don't need to
+ * actually run the packet through conntrack twice unless it's for a
+ * different zone.
+ */
+ if (!skb_nfct_cached(net, skb, info)) {
+ struct nf_conn *tmpl = info->ct;
+
+ /* Associate skb with specified zone. */
+ if (tmpl) {
+ if (skb->nfct)
+ nf_conntrack_put(skb->nfct);
+ nf_conntrack_get(&tmpl->ct_general);
+ skb->nfct = &tmpl->ct_general;
+ skb->nfctinfo = IP_CT_NEW;
+ }
+
+ if (nf_conntrack_in(net, info->family, NF_INET_PRE_ROUTING,
+ skb) != NF_ACCEPT)
+ return -ENOENT;
+
+ if (ovs_ct_helper(skb, info->family) != NF_ACCEPT) {
+ WARN_ONCE(1, "helper rejected packet");
+ return -EINVAL;
+ }
+ }
+
+ ovs_ct_update_key(skb, info, key, true);
+
+ return 0;
+}
+
+/* Lookup connection and read fields into key. */
+static int ovs_ct_lookup(struct net *net, struct sw_flow_key *key,
+ const struct ovs_conntrack_info *info,
+ struct sk_buff *skb)
+{
+ struct nf_conntrack_expect *exp;
+
+ exp = ovs_ct_expect_find(net, &info->zone, info->family, skb);
+ if (exp) {
+ u8 state;
+
+ state = OVS_CS_F_TRACKED | OVS_CS_F_NEW | OVS_CS_F_RELATED;
+ __ovs_ct_update_key(key, state, &info->zone, exp->master);
+ } else {
+ int err;
+
+ err = __ovs_ct_lookup(net, key, info, skb);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+/* Lookup connection and confirm if unconfirmed. */
+static int ovs_ct_commit(struct net *net, struct sw_flow_key *key,
+ const struct ovs_conntrack_info *info,
+ struct sk_buff *skb)
+{
+ u8 state;
+ int err;
+
+ state = key->ct.state;
+ if (key->ct.zone == info->zone.id &&
+ ((state & OVS_CS_F_TRACKED) && !(state & OVS_CS_F_NEW))) {
+ /* Previous lookup has shown that this connection is already
+ * tracked and committed. Skip committing.
+ */
+ return 0;
+ }
+
+ err = __ovs_ct_lookup(net, key, info, skb);
+ if (err)
+ return err;
+ if (nf_conntrack_confirm(skb) != NF_ACCEPT)
+ return -EINVAL;
+
+ return 0;
+}
+
+static bool labels_nonzero(const struct ovs_key_ct_labels *labels)
+{
+ size_t i;
+
+ for (i = 0; i < sizeof(*labels); i++)
+ if (labels->ct_labels[i])
+ return true;
+
+ return false;
+}
+
+/* Returns 0 on success, -EINPROGRESS if 'skb' is stolen, or other nonzero
+ * value if 'skb' is freed.
+ */
+int ovs_ct_execute(struct net *net, struct sk_buff *skb,
+ struct sw_flow_key *key,
+ const struct ovs_conntrack_info *info)
+{
+ int nh_ofs;
+ int err;
+
+ /* The conntrack module expects to be working at L3. */
+ nh_ofs = skb_network_offset(skb);
+ skb_pull_rcsum(skb, nh_ofs);
+
+ if (key->ip.frag != OVS_FRAG_TYPE_NONE) {
+ err = handle_fragments(net, key, info->zone.id, skb);
+ if (err)
+ return err;
+ }
+
+ if (info->commit)
+ err = ovs_ct_commit(net, key, info, skb);
+ else
+ err = ovs_ct_lookup(net, key, info, skb);
+ if (err)
+ goto err;
+
+ if (info->mark.mask) {
+ err = ovs_ct_set_mark(skb, key, info->mark.value,
+ info->mark.mask);
+ if (err)
+ goto err;
+ }
+ if (labels_nonzero(&info->labels.mask))
+ err = ovs_ct_set_labels(skb, key, &info->labels.value,
+ &info->labels.mask);
+err:
+ skb_push(skb, nh_ofs);
+ skb_postpush_rcsum(skb, skb->data, nh_ofs);
+ if (err)
+ kfree_skb(skb);
+ return err;
+}
+
+static int ovs_ct_add_helper(struct ovs_conntrack_info *info, const char *name,
+ const struct sw_flow_key *key, bool log)
+{
+ struct nf_conntrack_helper *helper;
+ struct nf_conn_help *help;
+
+ helper = nf_conntrack_helper_try_module_get(name, info->family,
+ key->ip.proto);
+ if (!helper) {
+ OVS_NLERR(log, "Unknown helper \"%s\"", name);
+ return -EINVAL;
+ }
+
+ help = nf_ct_helper_ext_add(info->ct, helper, GFP_KERNEL);
+ if (!help) {
+ module_put(helper->me);
+ return -ENOMEM;
+ }
+
+ rcu_assign_pointer(help->helper, helper);
+ info->helper = helper;
+ return 0;
+}
+
+static const struct ovs_ct_len_tbl ovs_ct_attr_lens[OVS_CT_ATTR_MAX + 1] = {
+ [OVS_CT_ATTR_COMMIT] = { .minlen = 0, .maxlen = 0 },
+ [OVS_CT_ATTR_ZONE] = { .minlen = sizeof(u16),
+ .maxlen = sizeof(u16) },
+ [OVS_CT_ATTR_MARK] = { .minlen = sizeof(struct md_mark),
+ .maxlen = sizeof(struct md_mark) },
+ [OVS_CT_ATTR_LABELS] = { .minlen = sizeof(struct md_labels),
+ .maxlen = sizeof(struct md_labels) },
+ [OVS_CT_ATTR_HELPER] = { .minlen = 1,
+ .maxlen = NF_CT_HELPER_NAME_LEN }
+};
+
+static int parse_ct(const struct nlattr *attr, struct ovs_conntrack_info *info,
+ const char **helper, bool log)
+{
+ struct nlattr *a;
+ int rem;
+
+ nla_for_each_nested(a, attr, rem) {
+ int type = nla_type(a);
+ int maxlen;
+ int minlen;
+
+ if (type > OVS_CT_ATTR_MAX) {
+ OVS_NLERR(log,
+ "Unknown conntrack attr (type=%d, max=%d)",
+ type, OVS_CT_ATTR_MAX);
+ return -EINVAL;
+ }
+
+ maxlen = ovs_ct_attr_lens[type].maxlen;
+ minlen = ovs_ct_attr_lens[type].minlen;
+ if (nla_len(a) < minlen || nla_len(a) > maxlen) {
+ OVS_NLERR(log,
+ "Conntrack attr type has unexpected length (type=%d, length=%d, expected=%d)",
+ type, nla_len(a), maxlen);
+ return -EINVAL;
+ }
+
+ switch (type) {
+ case OVS_CT_ATTR_COMMIT:
+ info->commit = true;
+ break;
+#ifdef CONFIG_NF_CONNTRACK_ZONES
+ case OVS_CT_ATTR_ZONE:
+ info->zone.id = nla_get_u16(a);
+ break;
+#endif
+#ifdef CONFIG_NF_CONNTRACK_MARK
+ case OVS_CT_ATTR_MARK: {
+ struct md_mark *mark = nla_data(a);
+
+ if (!mark->mask) {
+ OVS_NLERR(log, "ct_mark mask cannot be 0");
+ return -EINVAL;
+ }
+ info->mark = *mark;
+ break;
+ }
+#endif
+#ifdef CONFIG_NF_CONNTRACK_LABELS
+ case OVS_CT_ATTR_LABELS: {
+ struct md_labels *labels = nla_data(a);
+
+ if (!labels_nonzero(&labels->mask)) {
+ OVS_NLERR(log, "ct_labels mask cannot be 0");
+ return -EINVAL;
+ }
+ info->labels = *labels;
+ break;
+ }
+#endif
+ case OVS_CT_ATTR_HELPER:
+ *helper = nla_data(a);
+ if (!memchr(*helper, '\0', nla_len(a))) {
+ OVS_NLERR(log, "Invalid conntrack helper");
+ return -EINVAL;
+ }
+ break;
+ default:
+ OVS_NLERR(log, "Unknown conntrack attr (%d)",
+ type);
+ return -EINVAL;
+ }
+ }
+
+ if (rem > 0) {
+ OVS_NLERR(log, "Conntrack attr has %d unknown bytes", rem);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+bool ovs_ct_verify(struct net *net, enum ovs_key_attr attr)
+{
+ if (attr == OVS_KEY_ATTR_CT_STATE)
+ return true;
+ if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
+ attr == OVS_KEY_ATTR_CT_ZONE)
+ return true;
+ if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
+ attr == OVS_KEY_ATTR_CT_MARK)
+ return true;
+ if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
+ attr == OVS_KEY_ATTR_CT_LABELS) {
+ struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
+
+ return ovs_net->xt_label;
+ }
+
+ return false;
+}
+
+int ovs_ct_copy_action(struct net *net, const struct nlattr *attr,
+ const struct sw_flow_key *key,
+ struct sw_flow_actions **sfa, bool log)
+{
+ struct ovs_conntrack_info ct_info;
+ const char *helper = NULL;
+ u16 family;
+ int err;
+
+ family = key_to_nfproto(key);
+ if (family == NFPROTO_UNSPEC) {
+ OVS_NLERR(log, "ct family unspecified");
+ return -EINVAL;
+ }
+
+ memset(&ct_info, 0, sizeof(ct_info));
+ ct_info.family = family;
+
+ nf_ct_zone_init(&ct_info.zone, NF_CT_DEFAULT_ZONE_ID,
+ NF_CT_DEFAULT_ZONE_DIR, 0);
+
+ err = parse_ct(attr, &ct_info, &helper, log);
+ if (err)
+ return err;
+
+ /* Set up template for tracking connections in specific zones. */
+ ct_info.ct = nf_ct_tmpl_alloc(net, &ct_info.zone, GFP_KERNEL);
+ if (!ct_info.ct) {
+ OVS_NLERR(log, "Failed to allocate conntrack template");
+ return -ENOMEM;
+ }
+
+ __set_bit(IPS_CONFIRMED_BIT, &ct_info.ct->status);
+ nf_conntrack_get(&ct_info.ct->ct_general);
+
+ if (helper) {
+ err = ovs_ct_add_helper(&ct_info, helper, key, log);
+ if (err)
+ goto err_free_ct;
+ }
+
+ err = ovs_nla_add_action(sfa, OVS_ACTION_ATTR_CT, &ct_info,
+ sizeof(ct_info), log);
+ if (err)
+ goto err_free_ct;
+
+ return 0;
+err_free_ct:
+ __ovs_ct_free_action(&ct_info);
+ return err;
+}
+
+int ovs_ct_action_to_attr(const struct ovs_conntrack_info *ct_info,
+ struct sk_buff *skb)
+{
+ struct nlattr *start;
+
+ start = nla_nest_start(skb, OVS_ACTION_ATTR_CT);
+ if (!start)
+ return -EMSGSIZE;
+
+ if (ct_info->commit && nla_put_flag(skb, OVS_CT_ATTR_COMMIT))
+ return -EMSGSIZE;
+ if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
+ nla_put_u16(skb, OVS_CT_ATTR_ZONE, ct_info->zone.id))
+ return -EMSGSIZE;
+ if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && ct_info->mark.mask &&
+ nla_put(skb, OVS_CT_ATTR_MARK, sizeof(ct_info->mark),
+ &ct_info->mark))
+ return -EMSGSIZE;
+ if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
+ labels_nonzero(&ct_info->labels.mask) &&
+ nla_put(skb, OVS_CT_ATTR_LABELS, sizeof(ct_info->labels),
+ &ct_info->labels))
+ return -EMSGSIZE;
+ if (ct_info->helper) {
+ if (nla_put_string(skb, OVS_CT_ATTR_HELPER,
+ ct_info->helper->name))
+ return -EMSGSIZE;
+ }
+
+ nla_nest_end(skb, start);
+
+ return 0;
+}
+
+void ovs_ct_free_action(const struct nlattr *a)
+{
+ struct ovs_conntrack_info *ct_info = nla_data(a);
+
+ __ovs_ct_free_action(ct_info);
+}
+
+static void __ovs_ct_free_action(struct ovs_conntrack_info *ct_info)
+{
+ if (ct_info->helper)
+ module_put(ct_info->helper->me);
+ if (ct_info->ct)
+ nf_ct_put(ct_info->ct);
+}
+
+void ovs_ct_init(struct net *net)
+{
+ unsigned int n_bits = sizeof(struct ovs_key_ct_labels) * BITS_PER_BYTE;
+ struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
+
+ if (nf_connlabels_get(net, n_bits)) {
+ ovs_net->xt_label = false;
+ OVS_NLERR(true, "Failed to set connlabel length");
+ } else {
+ ovs_net->xt_label = true;
+ }
+}
+
+void ovs_ct_exit(struct net *net)
+{
+ struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
+
+ if (ovs_net->xt_label)
+ nf_connlabels_put(net);
+}
diff --git a/net/openvswitch/conntrack.h b/net/openvswitch/conntrack.h
new file mode 100644
index 0000000..a7544f4
--- /dev/null
+++ b/net/openvswitch/conntrack.h
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2015 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+
+#ifndef OVS_CONNTRACK_H
+#define OVS_CONNTRACK_H 1
+
+#include "flow.h"
+
+struct ovs_conntrack_info;
+enum ovs_key_attr;
+
+#if IS_ENABLED(CONFIG_NF_CONNTRACK)
+void ovs_ct_init(struct net *);
+void ovs_ct_exit(struct net *);
+bool ovs_ct_verify(struct net *, enum ovs_key_attr attr);
+int ovs_ct_copy_action(struct net *, const struct nlattr *,
+ const struct sw_flow_key *, struct sw_flow_actions **,
+ bool log);
+int ovs_ct_action_to_attr(const struct ovs_conntrack_info *, struct sk_buff *);
+
+int ovs_ct_execute(struct net *, struct sk_buff *, struct sw_flow_key *,
+ const struct ovs_conntrack_info *);
+
+void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key);
+int ovs_ct_put_key(const struct sw_flow_key *key, struct sk_buff *skb);
+void ovs_ct_free_action(const struct nlattr *a);
+
+#define CT_SUPPORTED_MASK (OVS_CS_F_NEW | OVS_CS_F_ESTABLISHED | \
+ OVS_CS_F_RELATED | OVS_CS_F_REPLY_DIR | \
+ OVS_CS_F_INVALID | OVS_CS_F_TRACKED)
+#else
+#include <linux/errno.h>
+
+static inline void ovs_ct_init(struct net *net) { }
+
+static inline void ovs_ct_exit(struct net *net) { }
+
+static inline bool ovs_ct_verify(struct net *net, int attr)
+{
+ return false;
+}
+
+static inline int ovs_ct_copy_action(struct net *net, const struct nlattr *nla,
+ const struct sw_flow_key *key,
+ struct sw_flow_actions **acts, bool log)
+{
+ return -ENOTSUPP;
+}
+
+static inline int ovs_ct_action_to_attr(const struct ovs_conntrack_info *info,
+ struct sk_buff *skb)
+{
+ return -ENOTSUPP;
+}
+
+static inline int ovs_ct_execute(struct net *net, struct sk_buff *skb,
+ struct sw_flow_key *key,
+ const struct ovs_conntrack_info *info)
+{
+ kfree_skb(skb);
+ return -ENOTSUPP;
+}
+
+static inline void ovs_ct_fill_key(const struct sk_buff *skb,
+ struct sw_flow_key *key)
+{
+ key->ct.state = 0;
+ key->ct.zone = 0;
+ key->ct.mark = 0;
+ memset(&key->ct.labels, 0, sizeof(key->ct.labels));
+}
+
+static inline int ovs_ct_put_key(const struct sw_flow_key *key,
+ struct sk_buff *skb)
+{
+ return 0;
+}
+
+static inline void ovs_ct_free_action(const struct nlattr *a) { }
+
+#define CT_SUPPORTED_MASK 0
+#endif /* CONFIG_NF_CONNTRACK */
+#endif /* ovs_conntrack.h */
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
new file mode 100644
index 0000000..deadfda
--- /dev/null
+++ b/net/openvswitch/datapath.c
@@ -0,0 +1,2377 @@
+/*
+ * Copyright (c) 2007-2014 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/if_arp.h>
+#include <linux/if_vlan.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/jhash.h>
+#include <linux/delay.h>
+#include <linux/time.h>
+#include <linux/etherdevice.h>
+#include <linux/genetlink.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/mutex.h>
+#include <linux/percpu.h>
+#include <linux/rcupdate.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/ethtool.h>
+#include <linux/wait.h>
+#include <asm/div64.h>
+#include <linux/highmem.h>
+#include <linux/netfilter_bridge.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/inetdevice.h>
+#include <linux/list.h>
+#include <linux/openvswitch.h>
+#include <linux/rculist.h>
+#include <linux/dmi.h>
+#include <net/genetlink.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+
+#include "datapath.h"
+#include "flow.h"
+#include "flow_table.h"
+#include "flow_netlink.h"
+#include "vport-internal_dev.h"
+#include "vport-netdev.h"
+
+int ovs_net_id __read_mostly;
+EXPORT_SYMBOL_GPL(ovs_net_id);
+
+static struct genl_family dp_packet_genl_family;
+static struct genl_family dp_flow_genl_family;
+static struct genl_family dp_datapath_genl_family;
+
+static const struct nla_policy flow_policy[];
+
+static const struct genl_multicast_group ovs_dp_flow_multicast_group = {
+ .name = OVS_FLOW_MCGROUP,
+};
+
+static const struct genl_multicast_group ovs_dp_datapath_multicast_group = {
+ .name = OVS_DATAPATH_MCGROUP,
+};
+
+static const struct genl_multicast_group ovs_dp_vport_multicast_group = {
+ .name = OVS_VPORT_MCGROUP,
+};
+
+/* Check if need to build a reply message.
+ * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */
+static bool ovs_must_notify(struct genl_family *family, struct genl_info *info,
+ unsigned int group)
+{
+ return info->nlhdr->nlmsg_flags & NLM_F_ECHO ||
+ genl_has_listeners(family, genl_info_net(info), group);
+}
+
+static void ovs_notify(struct genl_family *family,
+ struct sk_buff *skb, struct genl_info *info)
+{
+ genl_notify(family, skb, info, 0, GFP_KERNEL);
+}
+
+/**
+ * DOC: Locking:
+ *
+ * All writes e.g. Writes to device state (add/remove datapath, port, set
+ * operations on vports, etc.), Writes to other state (flow table
+ * modifications, set miscellaneous datapath parameters, etc.) are protected
+ * by ovs_lock.
+ *
+ * Reads are protected by RCU.
+ *
+ * There are a few special cases (mostly stats) that have their own
+ * synchronization but they nest under all of above and don't interact with
+ * each other.
+ *
+ * The RTNL lock nests inside ovs_mutex.
+ */
+
+static DEFINE_MUTEX(ovs_mutex);
+
+void ovs_lock(void)
+{
+ mutex_lock(&ovs_mutex);
+}
+
+void ovs_unlock(void)
+{
+ mutex_unlock(&ovs_mutex);
+}
+
+#ifdef CONFIG_LOCKDEP
+int lockdep_ovsl_is_held(void)
+{
+ if (debug_locks)
+ return lockdep_is_held(&ovs_mutex);
+ else
+ return 1;
+}
+EXPORT_SYMBOL_GPL(lockdep_ovsl_is_held);
+#endif
+
+static struct vport *new_vport(const struct vport_parms *);
+static int queue_gso_packets(struct datapath *dp, struct sk_buff *,
+ const struct sw_flow_key *,
+ const struct dp_upcall_info *);
+static int queue_userspace_packet(struct datapath *dp, struct sk_buff *,
+ const struct sw_flow_key *,
+ const struct dp_upcall_info *);
+
+/* Must be called with rcu_read_lock. */
+static struct datapath *get_dp_rcu(struct net *net, int dp_ifindex)
+{
+ struct net_device *dev = dev_get_by_index_rcu(net, dp_ifindex);
+
+ if (dev) {
+ struct vport *vport = ovs_internal_dev_get_vport(dev);
+ if (vport)
+ return vport->dp;
+ }
+
+ return NULL;
+}
+
+/* The caller must hold either ovs_mutex or rcu_read_lock to keep the
+ * returned dp pointer valid.
+ */
+static inline struct datapath *get_dp(struct net *net, int dp_ifindex)
+{
+ struct datapath *dp;
+
+ WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held());
+ rcu_read_lock();
+ dp = get_dp_rcu(net, dp_ifindex);
+ rcu_read_unlock();
+
+ return dp;
+}
+
+/* Must be called with rcu_read_lock or ovs_mutex. */
+const char *ovs_dp_name(const struct datapath *dp)
+{
+ struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL);
+ return ovs_vport_name(vport);
+}
+
+static int get_dpifindex(const struct datapath *dp)
+{
+ struct vport *local;
+ int ifindex;
+
+ rcu_read_lock();
+
+ local = ovs_vport_rcu(dp, OVSP_LOCAL);
+ if (local)
+ ifindex = local->dev->ifindex;
+ else
+ ifindex = 0;
+
+ rcu_read_unlock();
+
+ return ifindex;
+}
+
+static void destroy_dp_rcu(struct rcu_head *rcu)
+{
+ struct datapath *dp = container_of(rcu, struct datapath, rcu);
+
+ ovs_flow_tbl_destroy(&dp->table);
+ free_percpu(dp->stats_percpu);
+ kfree(dp->ports);
+ kfree(dp);
+}
+
+static struct hlist_head *vport_hash_bucket(const struct datapath *dp,
+ u16 port_no)
+{
+ return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)];
+}
+
+/* Called with ovs_mutex or RCU read lock. */
+struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no)
+{
+ struct vport *vport;
+ struct hlist_head *head;
+
+ head = vport_hash_bucket(dp, port_no);
+ hlist_for_each_entry_rcu(vport, head, dp_hash_node) {
+ if (vport->port_no == port_no)
+ return vport;
+ }
+ return NULL;
+}
+
+/* Called with ovs_mutex. */
+static struct vport *new_vport(const struct vport_parms *parms)
+{
+ struct vport *vport;
+
+ vport = ovs_vport_add(parms);
+ if (!IS_ERR(vport)) {
+ struct datapath *dp = parms->dp;
+ struct hlist_head *head = vport_hash_bucket(dp, vport->port_no);
+
+ hlist_add_head_rcu(&vport->dp_hash_node, head);
+ }
+ return vport;
+}
+
+void ovs_dp_detach_port(struct vport *p)
+{
+ ASSERT_OVSL();
+
+ /* First drop references to device. */
+ hlist_del_rcu(&p->dp_hash_node);
+
+ /* Then destroy it. */
+ ovs_vport_del(p);
+}
+
+/* Must be called with rcu_read_lock. */
+void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key)
+{
+ const struct vport *p = OVS_CB(skb)->input_vport;
+ struct datapath *dp = p->dp;
+ struct sw_flow *flow;
+ struct sw_flow_actions *sf_acts;
+ struct dp_stats_percpu *stats;
+ u64 *stats_counter;
+ u32 n_mask_hit;
+
+ stats = this_cpu_ptr(dp->stats_percpu);
+
+ /* Look up flow. */
+ flow = ovs_flow_tbl_lookup_stats(&dp->table, key, &n_mask_hit);
+ if (unlikely(!flow)) {
+ struct dp_upcall_info upcall;
+ int error;
+
+ memset(&upcall, 0, sizeof(upcall));
+ upcall.cmd = OVS_PACKET_CMD_MISS;
+ upcall.portid = ovs_vport_find_upcall_portid(p, skb);
+ upcall.mru = OVS_CB(skb)->mru;
+ error = ovs_dp_upcall(dp, skb, key, &upcall);
+ if (unlikely(error))
+ kfree_skb(skb);
+ else
+ consume_skb(skb);
+ stats_counter = &stats->n_missed;
+ goto out;
+ }
+
+ ovs_flow_stats_update(flow, key->tp.flags, skb);
+ sf_acts = rcu_dereference(flow->sf_acts);
+ ovs_execute_actions(dp, skb, sf_acts, key);
+
+ stats_counter = &stats->n_hit;
+
+out:
+ /* Update datapath statistics. */
+ u64_stats_update_begin(&stats->syncp);
+ (*stats_counter)++;
+ stats->n_mask_hit += n_mask_hit;
+ u64_stats_update_end(&stats->syncp);
+}
+
+int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
+ const struct sw_flow_key *key,
+ const struct dp_upcall_info *upcall_info)
+{
+ struct dp_stats_percpu *stats;
+ int err;
+
+ if (upcall_info->portid == 0) {
+ err = -ENOTCONN;
+ goto err;
+ }
+
+ if (!skb_is_gso(skb))
+ err = queue_userspace_packet(dp, skb, key, upcall_info);
+ else
+ err = queue_gso_packets(dp, skb, key, upcall_info);
+ if (err)
+ goto err;
+
+ return 0;
+
+err:
+ stats = this_cpu_ptr(dp->stats_percpu);
+
+ u64_stats_update_begin(&stats->syncp);
+ stats->n_lost++;
+ u64_stats_update_end(&stats->syncp);
+
+ return err;
+}
+
+static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb,
+ const struct sw_flow_key *key,
+ const struct dp_upcall_info *upcall_info)
+{
+ unsigned short gso_type = skb_shinfo(skb)->gso_type;
+ struct sw_flow_key later_key;
+ struct sk_buff *segs, *nskb;
+ int err;
+
+ BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_SGO_CB_OFFSET);
+ segs = __skb_gso_segment(skb, NETIF_F_SG, false);
+ if (IS_ERR(segs))
+ return PTR_ERR(segs);
+ if (segs == NULL)
+ return -EINVAL;
+
+ if (gso_type & SKB_GSO_UDP) {
+ /* The initial flow key extracted by ovs_flow_key_extract()
+ * in this case is for a first fragment, so we need to
+ * properly mark later fragments.
+ */
+ later_key = *key;
+ later_key.ip.frag = OVS_FRAG_TYPE_LATER;
+ }
+
+ /* Queue all of the segments. */
+ skb = segs;
+ do {
+ if (gso_type & SKB_GSO_UDP && skb != segs)
+ key = &later_key;
+
+ err = queue_userspace_packet(dp, skb, key, upcall_info);
+ if (err)
+ break;
+
+ } while ((skb = skb->next));
+
+ /* Free all of the segments. */
+ skb = segs;
+ do {
+ nskb = skb->next;
+ if (err)
+ kfree_skb(skb);
+ else
+ consume_skb(skb);
+ } while ((skb = nskb));
+ return err;
+}
+
+static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info,
+ unsigned int hdrlen)
+{
+ size_t size = NLMSG_ALIGN(sizeof(struct ovs_header))
+ + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */
+ + nla_total_size(ovs_key_attr_size()); /* OVS_PACKET_ATTR_KEY */
+
+ /* OVS_PACKET_ATTR_USERDATA */
+ if (upcall_info->userdata)
+ size += NLA_ALIGN(upcall_info->userdata->nla_len);
+
+ /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */
+ if (upcall_info->egress_tun_info)
+ size += nla_total_size(ovs_tun_key_attr_size());
+
+ /* OVS_PACKET_ATTR_ACTIONS */
+ if (upcall_info->actions_len)
+ size += nla_total_size(upcall_info->actions_len);
+
+ /* OVS_PACKET_ATTR_MRU */
+ if (upcall_info->mru)
+ size += nla_total_size(sizeof(upcall_info->mru));
+
+ return size;
+}
+
+static void pad_packet(struct datapath *dp, struct sk_buff *skb)
+{
+ if (!(dp->user_features & OVS_DP_F_UNALIGNED)) {
+ size_t plen = NLA_ALIGN(skb->len) - skb->len;
+
+ if (plen > 0)
+ memset(skb_put(skb, plen), 0, plen);
+ }
+}
+
+static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
+ const struct sw_flow_key *key,
+ const struct dp_upcall_info *upcall_info)
+{
+ struct ovs_header *upcall;
+ struct sk_buff *nskb = NULL;
+ struct sk_buff *user_skb = NULL; /* to be queued to userspace */
+ struct nlattr *nla;
+ struct genl_info info = {
+ .dst_sk = ovs_dp_get_net(dp)->genl_sock,
+ .snd_portid = upcall_info->portid,
+ };
+ size_t len;
+ unsigned int hlen;
+ int err, dp_ifindex;
+
+ dp_ifindex = get_dpifindex(dp);
+ if (!dp_ifindex)
+ return -ENODEV;
+
+ if (skb_vlan_tag_present(skb)) {
+ nskb = skb_clone(skb, GFP_ATOMIC);
+ if (!nskb)
+ return -ENOMEM;
+
+ nskb = __vlan_hwaccel_push_inside(nskb);
+ if (!nskb)
+ return -ENOMEM;
+
+ skb = nskb;
+ }
+
+ if (nla_attr_size(skb->len) > USHRT_MAX) {
+ err = -EFBIG;
+ goto out;
+ }
+
+ /* Complete checksum if needed */
+ if (skb->ip_summed == CHECKSUM_PARTIAL &&
+ (err = skb_checksum_help(skb)))
+ goto out;
+
+ /* Older versions of OVS user space enforce alignment of the last
+ * Netlink attribute to NLA_ALIGNTO which would require extensive
+ * padding logic. Only perform zerocopy if padding is not required.
+ */
+ if (dp->user_features & OVS_DP_F_UNALIGNED)
+ hlen = skb_zerocopy_headlen(skb);
+ else
+ hlen = skb->len;
+
+ len = upcall_msg_size(upcall_info, hlen);
+ user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC);
+ if (!user_skb) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
+ 0, upcall_info->cmd);
+ upcall->dp_ifindex = dp_ifindex;
+
+ err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb);
+ BUG_ON(err);
+
+ if (upcall_info->userdata)
+ __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA,
+ nla_len(upcall_info->userdata),
+ nla_data(upcall_info->userdata));
+
+ if (upcall_info->egress_tun_info) {
+ nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY);
+ err = ovs_nla_put_tunnel_info(user_skb,
+ upcall_info->egress_tun_info);
+ BUG_ON(err);
+ nla_nest_end(user_skb, nla);
+ }
+
+ if (upcall_info->actions_len) {
+ nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_ACTIONS);
+ err = ovs_nla_put_actions(upcall_info->actions,
+ upcall_info->actions_len,
+ user_skb);
+ if (!err)
+ nla_nest_end(user_skb, nla);
+ else
+ nla_nest_cancel(user_skb, nla);
+ }
+
+ /* Add OVS_PACKET_ATTR_MRU */
+ if (upcall_info->mru) {
+ if (nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU,
+ upcall_info->mru)) {
+ err = -ENOBUFS;
+ goto out;
+ }
+ pad_packet(dp, user_skb);
+ }
+
+ /* Only reserve room for attribute header, packet data is added
+ * in skb_zerocopy() */
+ if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) {
+ err = -ENOBUFS;
+ goto out;
+ }
+ nla->nla_len = nla_attr_size(skb->len);
+
+ err = skb_zerocopy(user_skb, skb, skb->len, hlen);
+ if (err)
+ goto out;
+
+ /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
+ pad_packet(dp, user_skb);
+
+ ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len;
+
+ err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid);
+ user_skb = NULL;
+out:
+ if (err)
+ skb_tx_error(skb);
+ kfree_skb(user_skb);
+ kfree_skb(nskb);
+ return err;
+}
+
+static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
+{
+ struct ovs_header *ovs_header = info->userhdr;
+ struct net *net = sock_net(skb->sk);
+ struct nlattr **a = info->attrs;
+ struct sw_flow_actions *acts;
+ struct sk_buff *packet;
+ struct sw_flow *flow;
+ struct sw_flow_actions *sf_acts;
+ struct datapath *dp;
+ struct ethhdr *eth;
+ struct vport *input_vport;
+ u16 mru = 0;
+ int len;
+ int err;
+ bool log = !a[OVS_PACKET_ATTR_PROBE];
+
+ err = -EINVAL;
+ if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
+ !a[OVS_PACKET_ATTR_ACTIONS])
+ goto err;
+
+ len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
+ packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
+ err = -ENOMEM;
+ if (!packet)
+ goto err;
+ skb_reserve(packet, NET_IP_ALIGN);
+
+ nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len);
+
+ skb_reset_mac_header(packet);
+ eth = eth_hdr(packet);
+
+ /* Normally, setting the skb 'protocol' field would be handled by a
+ * call to eth_type_trans(), but it assumes there's a sending
+ * device, which we may not have. */
+ if (eth_proto_is_802_3(eth->h_proto))
+ packet->protocol = eth->h_proto;
+ else
+ packet->protocol = htons(ETH_P_802_2);
+
+ /* Set packet's mru */
+ if (a[OVS_PACKET_ATTR_MRU]) {
+ mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]);
+ packet->ignore_df = 1;
+ }
+ OVS_CB(packet)->mru = mru;
+
+ /* Build an sw_flow for sending this packet. */
+ flow = ovs_flow_alloc();
+ err = PTR_ERR(flow);
+ if (IS_ERR(flow))
+ goto err_kfree_skb;
+
+ err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY],
+ packet, &flow->key, log);
+ if (err)
+ goto err_flow_free;
+
+ err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS],
+ &flow->key, &acts, log);
+ if (err)
+ goto err_flow_free;
+
+ rcu_assign_pointer(flow->sf_acts, acts);
+ packet->priority = flow->key.phy.priority;
+ packet->mark = flow->key.phy.skb_mark;
+
+ rcu_read_lock();
+ dp = get_dp_rcu(net, ovs_header->dp_ifindex);
+ err = -ENODEV;
+ if (!dp)
+ goto err_unlock;
+
+ input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port);
+ if (!input_vport)
+ input_vport = ovs_vport_rcu(dp, OVSP_LOCAL);
+
+ if (!input_vport)
+ goto err_unlock;
+
+ packet->dev = input_vport->dev;
+ OVS_CB(packet)->input_vport = input_vport;
+ sf_acts = rcu_dereference(flow->sf_acts);
+
+ local_bh_disable();
+ err = ovs_execute_actions(dp, packet, sf_acts, &flow->key);
+ local_bh_enable();
+ rcu_read_unlock();
+
+ ovs_flow_free(flow, false);
+ return err;
+
+err_unlock:
+ rcu_read_unlock();
+err_flow_free:
+ ovs_flow_free(flow, false);
+err_kfree_skb:
+ kfree_skb(packet);
+err:
+ return err;
+}
+
+static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
+ [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN },
+ [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
+ [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
+ [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG },
+ [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 },
+};
+
+static const struct genl_ops dp_packet_genl_ops[] = {
+ { .cmd = OVS_PACKET_CMD_EXECUTE,
+ .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
+ .policy = packet_policy,
+ .doit = ovs_packet_cmd_execute
+ }
+};
+
+static struct genl_family dp_packet_genl_family = {
+ .id = GENL_ID_GENERATE,
+ .hdrsize = sizeof(struct ovs_header),
+ .name = OVS_PACKET_FAMILY,
+ .version = OVS_PACKET_VERSION,
+ .maxattr = OVS_PACKET_ATTR_MAX,
+ .netnsok = true,
+ .parallel_ops = true,
+ .ops = dp_packet_genl_ops,
+ .n_ops = ARRAY_SIZE(dp_packet_genl_ops),
+};
+
+static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats,
+ struct ovs_dp_megaflow_stats *mega_stats)
+{
+ int i;
+
+ memset(mega_stats, 0, sizeof(*mega_stats));
+
+ stats->n_flows = ovs_flow_tbl_count(&dp->table);
+ mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table);
+
+ stats->n_hit = stats->n_missed = stats->n_lost = 0;
+
+ for_each_possible_cpu(i) {
+ const struct dp_stats_percpu *percpu_stats;
+ struct dp_stats_percpu local_stats;
+ unsigned int start;
+
+ percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
+
+ do {
+ start = u64_stats_fetch_begin_irq(&percpu_stats->syncp);
+ local_stats = *percpu_stats;
+ } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start));
+
+ stats->n_hit += local_stats.n_hit;
+ stats->n_missed += local_stats.n_missed;
+ stats->n_lost += local_stats.n_lost;
+ mega_stats->n_mask_hit += local_stats.n_mask_hit;
+ }
+}
+
+static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags)
+{
+ return ovs_identifier_is_ufid(sfid) &&
+ !(ufid_flags & OVS_UFID_F_OMIT_KEY);
+}
+
+static bool should_fill_mask(uint32_t ufid_flags)
+{
+ return !(ufid_flags & OVS_UFID_F_OMIT_MASK);
+}
+
+static bool should_fill_actions(uint32_t ufid_flags)
+{
+ return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS);
+}
+
+static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts,
+ const struct sw_flow_id *sfid,
+ uint32_t ufid_flags)
+{
+ size_t len = NLMSG_ALIGN(sizeof(struct ovs_header));
+
+ /* OVS_FLOW_ATTR_UFID */
+ if (sfid && ovs_identifier_is_ufid(sfid))
+ len += nla_total_size(sfid->ufid_len);
+
+ /* OVS_FLOW_ATTR_KEY */
+ if (!sfid || should_fill_key(sfid, ufid_flags))
+ len += nla_total_size(ovs_key_attr_size());
+
+ /* OVS_FLOW_ATTR_MASK */
+ if (should_fill_mask(ufid_flags))
+ len += nla_total_size(ovs_key_attr_size());
+
+ /* OVS_FLOW_ATTR_ACTIONS */
+ if (should_fill_actions(ufid_flags))
+ len += nla_total_size(acts->orig_len);
+
+ return len
+ + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */
+ + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
+ + nla_total_size(8); /* OVS_FLOW_ATTR_USED */
+}
+
+/* Called with ovs_mutex or RCU read lock. */
+static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow,
+ struct sk_buff *skb)
+{
+ struct ovs_flow_stats stats;
+ __be16 tcp_flags;
+ unsigned long used;
+
+ ovs_flow_stats_get(flow, &stats, &used, &tcp_flags);
+
+ if (used &&
+ nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used)))
+ return -EMSGSIZE;
+
+ if (stats.n_packets &&
+ nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats))
+ return -EMSGSIZE;
+
+ if ((u8)ntohs(tcp_flags) &&
+ nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags)))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+/* Called with ovs_mutex or RCU read lock. */
+static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow,
+ struct sk_buff *skb, int skb_orig_len)
+{
+ struct nlattr *start;
+ int err;
+
+ /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
+ * this is the first flow to be dumped into 'skb'. This is unusual for
+ * Netlink but individual action lists can be longer than
+ * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
+ * The userspace caller can always fetch the actions separately if it
+ * really wants them. (Most userspace callers in fact don't care.)
+ *
+ * This can only fail for dump operations because the skb is always
+ * properly sized for single flows.
+ */
+ start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS);
+ if (start) {
+ const struct sw_flow_actions *sf_acts;
+
+ sf_acts = rcu_dereference_ovsl(flow->sf_acts);
+ err = ovs_nla_put_actions(sf_acts->actions,
+ sf_acts->actions_len, skb);
+
+ if (!err)
+ nla_nest_end(skb, start);
+ else {
+ if (skb_orig_len)
+ return err;
+
+ nla_nest_cancel(skb, start);
+ }
+ } else if (skb_orig_len) {
+ return -EMSGSIZE;
+ }
+
+ return 0;
+}
+
+/* Called with ovs_mutex or RCU read lock. */
+static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex,
+ struct sk_buff *skb, u32 portid,
+ u32 seq, u32 flags, u8 cmd, u32 ufid_flags)
+{
+ const int skb_orig_len = skb->len;
+ struct ovs_header *ovs_header;
+ int err;
+
+ ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family,
+ flags, cmd);
+ if (!ovs_header)
+ return -EMSGSIZE;
+
+ ovs_header->dp_ifindex = dp_ifindex;
+
+ err = ovs_nla_put_identifier(flow, skb);
+ if (err)
+ goto error;
+
+ if (should_fill_key(&flow->id, ufid_flags)) {
+ err = ovs_nla_put_masked_key(flow, skb);
+ if (err)
+ goto error;
+ }
+
+ if (should_fill_mask(ufid_flags)) {
+ err = ovs_nla_put_mask(flow, skb);
+ if (err)
+ goto error;
+ }
+
+ err = ovs_flow_cmd_fill_stats(flow, skb);
+ if (err)
+ goto error;
+
+ if (should_fill_actions(ufid_flags)) {
+ err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len);
+ if (err)
+ goto error;
+ }
+
+ genlmsg_end(skb, ovs_header);
+ return 0;
+
+error:
+ genlmsg_cancel(skb, ovs_header);
+ return err;
+}
+
+/* May not be called with RCU read lock. */
+static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts,
+ const struct sw_flow_id *sfid,
+ struct genl_info *info,
+ bool always,
+ uint32_t ufid_flags)
+{
+ struct sk_buff *skb;
+ size_t len;
+
+ if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0))
+ return NULL;
+
+ len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags);
+ skb = genlmsg_new_unicast(len, info, GFP_KERNEL);
+ if (!skb)
+ return ERR_PTR(-ENOMEM);
+
+ return skb;
+}
+
+/* Called with ovs_mutex. */
+static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow,
+ int dp_ifindex,
+ struct genl_info *info, u8 cmd,
+ bool always, u32 ufid_flags)
+{
+ struct sk_buff *skb;
+ int retval;
+
+ skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts),
+ &flow->id, info, always, ufid_flags);
+ if (IS_ERR_OR_NULL(skb))
+ return skb;
+
+ retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb,
+ info->snd_portid, info->snd_seq, 0,
+ cmd, ufid_flags);
+ BUG_ON(retval < 0);
+ return skb;
+}
+
+static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info)
+{
+ struct net *net = sock_net(skb->sk);
+ struct nlattr **a = info->attrs;
+ struct ovs_header *ovs_header = info->userhdr;
+ struct sw_flow *flow = NULL, *new_flow;
+ struct sw_flow_mask mask;
+ struct sk_buff *reply;
+ struct datapath *dp;
+ struct sw_flow_key key;
+ struct sw_flow_actions *acts;
+ struct sw_flow_match match;
+ u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]);
+ int error;
+ bool log = !a[OVS_FLOW_ATTR_PROBE];
+
+ /* Must have key and actions. */
+ error = -EINVAL;
+ if (!a[OVS_FLOW_ATTR_KEY]) {
+ OVS_NLERR(log, "Flow key attr not present in new flow.");
+ goto error;
+ }
+ if (!a[OVS_FLOW_ATTR_ACTIONS]) {
+ OVS_NLERR(log, "Flow actions attr not present in new flow.");
+ goto error;
+ }
+
+ /* Most of the time we need to allocate a new flow, do it before
+ * locking.
+ */
+ new_flow = ovs_flow_alloc();
+ if (IS_ERR(new_flow)) {
+ error = PTR_ERR(new_flow);
+ goto error;
+ }
+
+ /* Extract key. */
+ ovs_match_init(&match, &key, &mask);
+ error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY],
+ a[OVS_FLOW_ATTR_MASK], log);
+ if (error)
+ goto err_kfree_flow;
+
+ ovs_flow_mask_key(&new_flow->key, &key, true, &mask);
+
+ /* Extract flow identifier. */
+ error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID],
+ &key, log);
+ if (error)
+ goto err_kfree_flow;
+
+ /* Validate actions. */
+ error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS],
+ &new_flow->key, &acts, log);
+ if (error) {
+ OVS_NLERR(log, "Flow actions may not be safe on all matching packets.");
+ goto err_kfree_flow;
+ }
+
+ reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false,
+ ufid_flags);
+ if (IS_ERR(reply)) {
+ error = PTR_ERR(reply);
+ goto err_kfree_acts;
+ }
+
+ ovs_lock();
+ dp = get_dp(net, ovs_header->dp_ifindex);
+ if (unlikely(!dp)) {
+ error = -ENODEV;
+ goto err_unlock_ovs;
+ }
+
+ /* Check if this is a duplicate flow */
+ if (ovs_identifier_is_ufid(&new_flow->id))
+ flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id);
+ if (!flow)
+ flow = ovs_flow_tbl_lookup(&dp->table, &key);
+ if (likely(!flow)) {
+ rcu_assign_pointer(new_flow->sf_acts, acts);
+
+ /* Put flow in bucket. */
+ error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask);
+ if (unlikely(error)) {
+ acts = NULL;
+ goto err_unlock_ovs;
+ }
+
+ if (unlikely(reply)) {
+ error = ovs_flow_cmd_fill_info(new_flow,
+ ovs_header->dp_ifindex,
+ reply, info->snd_portid,
+ info->snd_seq, 0,
+ OVS_FLOW_CMD_NEW,
+ ufid_flags);
+ BUG_ON(error < 0);
+ }
+ ovs_unlock();
+ } else {
+ struct sw_flow_actions *old_acts;
+
+ /* Bail out if we're not allowed to modify an existing flow.
+ * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
+ * because Generic Netlink treats the latter as a dump
+ * request. We also accept NLM_F_EXCL in case that bug ever
+ * gets fixed.
+ */
+ if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE
+ | NLM_F_EXCL))) {
+ error = -EEXIST;
+ goto err_unlock_ovs;
+ }
+ /* The flow identifier has to be the same for flow updates.
+ * Look for any overlapping flow.
+ */
+ if (unlikely(!ovs_flow_cmp(flow, &match))) {
+ if (ovs_identifier_is_key(&flow->id))
+ flow = ovs_flow_tbl_lookup_exact(&dp->table,
+ &match);
+ else /* UFID matches but key is different */
+ flow = NULL;
+ if (!flow) {
+ error = -ENOENT;
+ goto err_unlock_ovs;
+ }
+ }
+ /* Update actions. */
+ old_acts = ovsl_dereference(flow->sf_acts);
+ rcu_assign_pointer(flow->sf_acts, acts);
+
+ if (unlikely(reply)) {
+ error = ovs_flow_cmd_fill_info(flow,
+ ovs_header->dp_ifindex,
+ reply, info->snd_portid,
+ info->snd_seq, 0,
+ OVS_FLOW_CMD_NEW,
+ ufid_flags);
+ BUG_ON(error < 0);
+ }
+ ovs_unlock();
+
+ ovs_nla_free_flow_actions_rcu(old_acts);
+ ovs_flow_free(new_flow, false);
+ }
+
+ if (reply)
+ ovs_notify(&dp_flow_genl_family, reply, info);
+ return 0;
+
+err_unlock_ovs:
+ ovs_unlock();
+ kfree_skb(reply);
+err_kfree_acts:
+ ovs_nla_free_flow_actions(acts);
+err_kfree_flow:
+ ovs_flow_free(new_flow, false);
+error:
+ return error;
+}
+
+/* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */
+static struct sw_flow_actions *get_flow_actions(struct net *net,
+ const struct nlattr *a,
+ const struct sw_flow_key *key,
+ const struct sw_flow_mask *mask,
+ bool log)
+{
+ struct sw_flow_actions *acts;
+ struct sw_flow_key masked_key;
+ int error;
+
+ ovs_flow_mask_key(&masked_key, key, true, mask);
+ error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log);
+ if (error) {
+ OVS_NLERR(log,
+ "Actions may not be safe on all matching packets");
+ return ERR_PTR(error);
+ }
+
+ return acts;
+}
+
+static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info)
+{
+ struct net *net = sock_net(skb->sk);
+ struct nlattr **a = info->attrs;
+ struct ovs_header *ovs_header = info->userhdr;
+ struct sw_flow_key key;
+ struct sw_flow *flow;
+ struct sw_flow_mask mask;
+ struct sk_buff *reply = NULL;
+ struct datapath *dp;
+ struct sw_flow_actions *old_acts = NULL, *acts = NULL;
+ struct sw_flow_match match;
+ struct sw_flow_id sfid;
+ u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]);
+ int error;
+ bool log = !a[OVS_FLOW_ATTR_PROBE];
+ bool ufid_present;
+
+ /* Extract key. */
+ error = -EINVAL;
+ if (!a[OVS_FLOW_ATTR_KEY]) {
+ OVS_NLERR(log, "Flow key attribute not present in set flow.");
+ goto error;
+ }
+
+ ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log);
+ ovs_match_init(&match, &key, &mask);
+ error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY],
+ a[OVS_FLOW_ATTR_MASK], log);
+ if (error)
+ goto error;
+
+ /* Validate actions. */
+ if (a[OVS_FLOW_ATTR_ACTIONS]) {
+ acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], &key,
+ &mask, log);
+ if (IS_ERR(acts)) {
+ error = PTR_ERR(acts);
+ goto error;
+ }
+
+ /* Can allocate before locking if have acts. */
+ reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false,
+ ufid_flags);
+ if (IS_ERR(reply)) {
+ error = PTR_ERR(reply);
+ goto err_kfree_acts;
+ }
+ }
+
+ ovs_lock();
+ dp = get_dp(net, ovs_header->dp_ifindex);
+ if (unlikely(!dp)) {
+ error = -ENODEV;
+ goto err_unlock_ovs;
+ }
+ /* Check that the flow exists. */
+ if (ufid_present)
+ flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid);
+ else
+ flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
+ if (unlikely(!flow)) {
+ error = -ENOENT;
+ goto err_unlock_ovs;
+ }
+
+ /* Update actions, if present. */
+ if (likely(acts)) {
+ old_acts = ovsl_dereference(flow->sf_acts);
+ rcu_assign_pointer(flow->sf_acts, acts);
+
+ if (unlikely(reply)) {
+ error = ovs_flow_cmd_fill_info(flow,
+ ovs_header->dp_ifindex,
+ reply, info->snd_portid,
+ info->snd_seq, 0,
+ OVS_FLOW_CMD_NEW,
+ ufid_flags);
+ BUG_ON(error < 0);
+ }
+ } else {
+ /* Could not alloc without acts before locking. */
+ reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex,
+ info, OVS_FLOW_CMD_NEW, false,
+ ufid_flags);
+
+ if (IS_ERR(reply)) {
+ error = PTR_ERR(reply);
+ goto err_unlock_ovs;
+ }
+ }
+
+ /* Clear stats. */
+ if (a[OVS_FLOW_ATTR_CLEAR])
+ ovs_flow_stats_clear(flow);
+ ovs_unlock();
+
+ if (reply)
+ ovs_notify(&dp_flow_genl_family, reply, info);
+ if (old_acts)
+ ovs_nla_free_flow_actions_rcu(old_acts);
+
+ return 0;
+
+err_unlock_ovs:
+ ovs_unlock();
+ kfree_skb(reply);
+err_kfree_acts:
+ ovs_nla_free_flow_actions(acts);
+error:
+ return error;
+}
+
+static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr **a = info->attrs;
+ struct ovs_header *ovs_header = info->userhdr;
+ struct net *net = sock_net(skb->sk);
+ struct sw_flow_key key;
+ struct sk_buff *reply;
+ struct sw_flow *flow;
+ struct datapath *dp;
+ struct sw_flow_match match;
+ struct sw_flow_id ufid;
+ u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]);
+ int err = 0;
+ bool log = !a[OVS_FLOW_ATTR_PROBE];
+ bool ufid_present;
+
+ ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log);
+ if (a[OVS_FLOW_ATTR_KEY]) {
+ ovs_match_init(&match, &key, NULL);
+ err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL,
+ log);
+ } else if (!ufid_present) {
+ OVS_NLERR(log,
+ "Flow get message rejected, Key attribute missing.");
+ err = -EINVAL;
+ }
+ if (err)
+ return err;
+
+ ovs_lock();
+ dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
+ if (!dp) {
+ err = -ENODEV;
+ goto unlock;
+ }
+
+ if (ufid_present)
+ flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid);
+ else
+ flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
+ if (!flow) {
+ err = -ENOENT;
+ goto unlock;
+ }
+
+ reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info,
+ OVS_FLOW_CMD_NEW, true, ufid_flags);
+ if (IS_ERR(reply)) {
+ err = PTR_ERR(reply);
+ goto unlock;
+ }
+
+ ovs_unlock();
+ return genlmsg_reply(reply, info);
+unlock:
+ ovs_unlock();
+ return err;
+}
+
+static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr **a = info->attrs;
+ struct ovs_header *ovs_header = info->userhdr;
+ struct net *net = sock_net(skb->sk);
+ struct sw_flow_key key;
+ struct sk_buff *reply;
+ struct sw_flow *flow = NULL;
+ struct datapath *dp;
+ struct sw_flow_match match;
+ struct sw_flow_id ufid;
+ u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]);
+ int err;
+ bool log = !a[OVS_FLOW_ATTR_PROBE];
+ bool ufid_present;
+
+ ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log);
+ if (a[OVS_FLOW_ATTR_KEY]) {
+ ovs_match_init(&match, &key, NULL);
+ err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY],
+ NULL, log);
+ if (unlikely(err))
+ return err;
+ }
+
+ ovs_lock();
+ dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
+ if (unlikely(!dp)) {
+ err = -ENODEV;
+ goto unlock;
+ }
+
+ if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) {
+ err = ovs_flow_tbl_flush(&dp->table);
+ goto unlock;
+ }
+
+ if (ufid_present)
+ flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid);
+ else
+ flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
+ if (unlikely(!flow)) {
+ err = -ENOENT;
+ goto unlock;
+ }
+
+ ovs_flow_tbl_remove(&dp->table, flow);
+ ovs_unlock();
+
+ reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts,
+ &flow->id, info, false, ufid_flags);
+ if (likely(reply)) {
+ if (likely(!IS_ERR(reply))) {
+ rcu_read_lock(); /*To keep RCU checker happy. */
+ err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex,
+ reply, info->snd_portid,
+ info->snd_seq, 0,
+ OVS_FLOW_CMD_DEL,
+ ufid_flags);
+ rcu_read_unlock();
+ BUG_ON(err < 0);
+
+ ovs_notify(&dp_flow_genl_family, reply, info);
+ } else {
+ netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply));
+ }
+ }
+
+ ovs_flow_free(flow, true);
+ return 0;
+unlock:
+ ovs_unlock();
+ return err;
+}
+
+static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct nlattr *a[__OVS_FLOW_ATTR_MAX];
+ struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
+ struct table_instance *ti;
+ struct datapath *dp;
+ u32 ufid_flags;
+ int err;
+
+ err = genlmsg_parse(cb->nlh, &dp_flow_genl_family, a,
+ OVS_FLOW_ATTR_MAX, flow_policy);
+ if (err)
+ return err;
+ ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]);
+
+ rcu_read_lock();
+ dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex);
+ if (!dp) {
+ rcu_read_unlock();
+ return -ENODEV;
+ }
+
+ ti = rcu_dereference(dp->table.ti);
+ for (;;) {
+ struct sw_flow *flow;
+ u32 bucket, obj;
+
+ bucket = cb->args[0];
+ obj = cb->args[1];
+ flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj);
+ if (!flow)
+ break;
+
+ if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, NLM_F_MULTI,
+ OVS_FLOW_CMD_NEW, ufid_flags) < 0)
+ break;
+
+ cb->args[0] = bucket;
+ cb->args[1] = obj;
+ }
+ rcu_read_unlock();
+ return skb->len;
+}
+
+static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
+ [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
+ [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED },
+ [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
+ [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
+ [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG },
+ [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 },
+ [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 },
+};
+
+static const struct genl_ops dp_flow_genl_ops[] = {
+ { .cmd = OVS_FLOW_CMD_NEW,
+ .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
+ .policy = flow_policy,
+ .doit = ovs_flow_cmd_new
+ },
+ { .cmd = OVS_FLOW_CMD_DEL,
+ .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
+ .policy = flow_policy,
+ .doit = ovs_flow_cmd_del
+ },
+ { .cmd = OVS_FLOW_CMD_GET,
+ .flags = 0, /* OK for unprivileged users. */
+ .policy = flow_policy,
+ .doit = ovs_flow_cmd_get,
+ .dumpit = ovs_flow_cmd_dump
+ },
+ { .cmd = OVS_FLOW_CMD_SET,
+ .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
+ .policy = flow_policy,
+ .doit = ovs_flow_cmd_set,
+ },
+};
+
+static struct genl_family dp_flow_genl_family = {
+ .id = GENL_ID_GENERATE,
+ .hdrsize = sizeof(struct ovs_header),
+ .name = OVS_FLOW_FAMILY,
+ .version = OVS_FLOW_VERSION,
+ .maxattr = OVS_FLOW_ATTR_MAX,
+ .netnsok = true,
+ .parallel_ops = true,
+ .ops = dp_flow_genl_ops,
+ .n_ops = ARRAY_SIZE(dp_flow_genl_ops),
+ .mcgrps = &ovs_dp_flow_multicast_group,
+ .n_mcgrps = 1,
+};
+
+static size_t ovs_dp_cmd_msg_size(void)
+{
+ size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header));
+
+ msgsize += nla_total_size(IFNAMSIZ);
+ msgsize += nla_total_size(sizeof(struct ovs_dp_stats));
+ msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats));
+ msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */
+
+ return msgsize;
+}
+
+/* Called with ovs_mutex. */
+static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
+ u32 portid, u32 seq, u32 flags, u8 cmd)
+{
+ struct ovs_header *ovs_header;
+ struct ovs_dp_stats dp_stats;
+ struct ovs_dp_megaflow_stats dp_megaflow_stats;
+ int err;
+
+ ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family,
+ flags, cmd);
+ if (!ovs_header)
+ goto error;
+
+ ovs_header->dp_ifindex = get_dpifindex(dp);
+
+ err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp));
+ if (err)
+ goto nla_put_failure;
+
+ get_dp_stats(dp, &dp_stats, &dp_megaflow_stats);
+ if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats),
+ &dp_stats))
+ goto nla_put_failure;
+
+ if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS,
+ sizeof(struct ovs_dp_megaflow_stats),
+ &dp_megaflow_stats))
+ goto nla_put_failure;
+
+ if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features))
+ goto nla_put_failure;
+
+ genlmsg_end(skb, ovs_header);
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(skb, ovs_header);
+error:
+ return -EMSGSIZE;
+}
+
+static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info)
+{
+ return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL);
+}
+
+/* Called with rcu_read_lock or ovs_mutex. */
+static struct datapath *lookup_datapath(struct net *net,
+ const struct ovs_header *ovs_header,
+ struct nlattr *a[OVS_DP_ATTR_MAX + 1])
+{
+ struct datapath *dp;
+
+ if (!a[OVS_DP_ATTR_NAME])
+ dp = get_dp(net, ovs_header->dp_ifindex);
+ else {
+ struct vport *vport;
+
+ vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME]));
+ dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
+ }
+ return dp ? dp : ERR_PTR(-ENODEV);
+}
+
+static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info)
+{
+ struct datapath *dp;
+
+ dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
+ if (IS_ERR(dp))
+ return;
+
+ WARN(dp->user_features, "Dropping previously announced user features\n");
+ dp->user_features = 0;
+}
+
+static void ovs_dp_change(struct datapath *dp, struct nlattr *a[])
+{
+ if (a[OVS_DP_ATTR_USER_FEATURES])
+ dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]);
+}
+
+static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr **a = info->attrs;
+ struct vport_parms parms;
+ struct sk_buff *reply;
+ struct datapath *dp;
+ struct vport *vport;
+ struct ovs_net *ovs_net;
+ int err, i;
+
+ err = -EINVAL;
+ if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
+ goto err;
+
+ reply = ovs_dp_cmd_alloc_info(info);
+ if (!reply)
+ return -ENOMEM;
+
+ err = -ENOMEM;
+ dp = kzalloc(sizeof(*dp), GFP_KERNEL);
+ if (dp == NULL)
+ goto err_free_reply;
+
+ ovs_dp_set_net(dp, sock_net(skb->sk));
+
+ /* Allocate table. */
+ err = ovs_flow_tbl_init(&dp->table);
+ if (err)
+ goto err_free_dp;
+
+ dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu);
+ if (!dp->stats_percpu) {
+ err = -ENOMEM;
+ goto err_destroy_table;
+ }
+
+ dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
+ GFP_KERNEL);
+ if (!dp->ports) {
+ err = -ENOMEM;
+ goto err_destroy_percpu;
+ }
+
+ for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
+ INIT_HLIST_HEAD(&dp->ports[i]);
+
+ /* Set up our datapath device. */
+ parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
+ parms.type = OVS_VPORT_TYPE_INTERNAL;
+ parms.options = NULL;
+ parms.dp = dp;
+ parms.port_no = OVSP_LOCAL;
+ parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID];
+
+ ovs_dp_change(dp, a);
+
+ /* So far only local changes have been made, now need the lock. */
+ ovs_lock();
+
+ vport = new_vport(&parms);
+ if (IS_ERR(vport)) {
+ err = PTR_ERR(vport);
+ if (err == -EBUSY)
+ err = -EEXIST;
+
+ if (err == -EEXIST) {
+ /* An outdated user space instance that does not understand
+ * the concept of user_features has attempted to create a new
+ * datapath and is likely to reuse it. Drop all user features.
+ */
+ if (info->genlhdr->version < OVS_DP_VER_FEATURES)
+ ovs_dp_reset_user_features(skb, info);
+ }
+
+ goto err_destroy_ports_array;
+ }
+
+ err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
+ info->snd_seq, 0, OVS_DP_CMD_NEW);
+ BUG_ON(err < 0);
+
+ ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id);
+ list_add_tail_rcu(&dp->list_node, &ovs_net->dps);
+
+ ovs_unlock();
+
+ ovs_notify(&dp_datapath_genl_family, reply, info);
+ return 0;
+
+err_destroy_ports_array:
+ ovs_unlock();
+ kfree(dp->ports);
+err_destroy_percpu:
+ free_percpu(dp->stats_percpu);
+err_destroy_table:
+ ovs_flow_tbl_destroy(&dp->table);
+err_free_dp:
+ kfree(dp);
+err_free_reply:
+ kfree_skb(reply);
+err:
+ return err;
+}
+
+/* Called with ovs_mutex. */
+static void __dp_destroy(struct datapath *dp)
+{
+ int i;
+
+ for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
+ struct vport *vport;
+ struct hlist_node *n;
+
+ hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node)
+ if (vport->port_no != OVSP_LOCAL)
+ ovs_dp_detach_port(vport);
+ }
+
+ list_del_rcu(&dp->list_node);
+
+ /* OVSP_LOCAL is datapath internal port. We need to make sure that
+ * all ports in datapath are destroyed first before freeing datapath.
+ */
+ ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL));
+
+ /* RCU destroy the flow table */
+ call_rcu(&dp->rcu, destroy_dp_rcu);
+}
+
+static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
+{
+ struct sk_buff *reply;
+ struct datapath *dp;
+ int err;
+
+ reply = ovs_dp_cmd_alloc_info(info);
+ if (!reply)
+ return -ENOMEM;
+
+ ovs_lock();
+ dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
+ err = PTR_ERR(dp);
+ if (IS_ERR(dp))
+ goto err_unlock_free;
+
+ err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
+ info->snd_seq, 0, OVS_DP_CMD_DEL);
+ BUG_ON(err < 0);
+
+ __dp_destroy(dp);
+ ovs_unlock();
+
+ ovs_notify(&dp_datapath_genl_family, reply, info);
+
+ return 0;
+
+err_unlock_free:
+ ovs_unlock();
+ kfree_skb(reply);
+ return err;
+}
+
+static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
+{
+ struct sk_buff *reply;
+ struct datapath *dp;
+ int err;
+
+ reply = ovs_dp_cmd_alloc_info(info);
+ if (!reply)
+ return -ENOMEM;
+
+ ovs_lock();
+ dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
+ err = PTR_ERR(dp);
+ if (IS_ERR(dp))
+ goto err_unlock_free;
+
+ ovs_dp_change(dp, info->attrs);
+
+ err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
+ info->snd_seq, 0, OVS_DP_CMD_NEW);
+ BUG_ON(err < 0);
+
+ ovs_unlock();
+ ovs_notify(&dp_datapath_genl_family, reply, info);
+
+ return 0;
+
+err_unlock_free:
+ ovs_unlock();
+ kfree_skb(reply);
+ return err;
+}
+
+static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
+{
+ struct sk_buff *reply;
+ struct datapath *dp;
+ int err;
+
+ reply = ovs_dp_cmd_alloc_info(info);
+ if (!reply)
+ return -ENOMEM;
+
+ ovs_lock();
+ dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
+ if (IS_ERR(dp)) {
+ err = PTR_ERR(dp);
+ goto err_unlock_free;
+ }
+ err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
+ info->snd_seq, 0, OVS_DP_CMD_NEW);
+ BUG_ON(err < 0);
+ ovs_unlock();
+
+ return genlmsg_reply(reply, info);
+
+err_unlock_free:
+ ovs_unlock();
+ kfree_skb(reply);
+ return err;
+}
+
+static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id);
+ struct datapath *dp;
+ int skip = cb->args[0];
+ int i = 0;
+
+ ovs_lock();
+ list_for_each_entry(dp, &ovs_net->dps, list_node) {
+ if (i >= skip &&
+ ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, NLM_F_MULTI,
+ OVS_DP_CMD_NEW) < 0)
+ break;
+ i++;
+ }
+ ovs_unlock();
+
+ cb->args[0] = i;
+
+ return skb->len;
+}
+
+static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
+ [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
+ [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
+ [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 },
+};
+
+static const struct genl_ops dp_datapath_genl_ops[] = {
+ { .cmd = OVS_DP_CMD_NEW,
+ .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
+ .policy = datapath_policy,
+ .doit = ovs_dp_cmd_new
+ },
+ { .cmd = OVS_DP_CMD_DEL,
+ .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
+ .policy = datapath_policy,
+ .doit = ovs_dp_cmd_del
+ },
+ { .cmd = OVS_DP_CMD_GET,
+ .flags = 0, /* OK for unprivileged users. */
+ .policy = datapath_policy,
+ .doit = ovs_dp_cmd_get,
+ .dumpit = ovs_dp_cmd_dump
+ },
+ { .cmd = OVS_DP_CMD_SET,
+ .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
+ .policy = datapath_policy,
+ .doit = ovs_dp_cmd_set,
+ },
+};
+
+static struct genl_family dp_datapath_genl_family = {
+ .id = GENL_ID_GENERATE,
+ .hdrsize = sizeof(struct ovs_header),
+ .name = OVS_DATAPATH_FAMILY,
+ .version = OVS_DATAPATH_VERSION,
+ .maxattr = OVS_DP_ATTR_MAX,
+ .netnsok = true,
+ .parallel_ops = true,
+ .ops = dp_datapath_genl_ops,
+ .n_ops = ARRAY_SIZE(dp_datapath_genl_ops),
+ .mcgrps = &ovs_dp_datapath_multicast_group,
+ .n_mcgrps = 1,
+};
+
+/* Called with ovs_mutex or RCU read lock. */
+static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
+ u32 portid, u32 seq, u32 flags, u8 cmd)
+{
+ struct ovs_header *ovs_header;
+ struct ovs_vport_stats vport_stats;
+ int err;
+
+ ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family,
+ flags, cmd);
+ if (!ovs_header)
+ return -EMSGSIZE;
+
+ ovs_header->dp_ifindex = get_dpifindex(vport->dp);
+
+ if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) ||
+ nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) ||
+ nla_put_string(skb, OVS_VPORT_ATTR_NAME,
+ ovs_vport_name(vport)))
+ goto nla_put_failure;
+
+ ovs_vport_get_stats(vport, &vport_stats);
+ if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats),
+ &vport_stats))
+ goto nla_put_failure;
+
+ if (ovs_vport_get_upcall_portids(vport, skb))
+ goto nla_put_failure;
+
+ err = ovs_vport_get_options(vport, skb);
+ if (err == -EMSGSIZE)
+ goto error;
+
+ genlmsg_end(skb, ovs_header);
+ return 0;
+
+nla_put_failure:
+ err = -EMSGSIZE;
+error:
+ genlmsg_cancel(skb, ovs_header);
+ return err;
+}
+
+static struct sk_buff *ovs_vport_cmd_alloc_info(void)
+{
+ return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+}
+
+/* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
+struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid,
+ u32 seq, u8 cmd)
+{
+ struct sk_buff *skb;
+ int retval;
+
+ skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
+ if (!skb)
+ return ERR_PTR(-ENOMEM);
+
+ retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd);
+ BUG_ON(retval < 0);
+
+ return skb;
+}
+
+/* Called with ovs_mutex or RCU read lock. */
+static struct vport *lookup_vport(struct net *net,
+ const struct ovs_header *ovs_header,
+ struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
+{
+ struct datapath *dp;
+ struct vport *vport;
+
+ if (a[OVS_VPORT_ATTR_NAME]) {
+ vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME]));
+ if (!vport)
+ return ERR_PTR(-ENODEV);
+ if (ovs_header->dp_ifindex &&
+ ovs_header->dp_ifindex != get_dpifindex(vport->dp))
+ return ERR_PTR(-ENODEV);
+ return vport;
+ } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
+ u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
+
+ if (port_no >= DP_MAX_PORTS)
+ return ERR_PTR(-EFBIG);
+
+ dp = get_dp(net, ovs_header->dp_ifindex);
+ if (!dp)
+ return ERR_PTR(-ENODEV);
+
+ vport = ovs_vport_ovsl_rcu(dp, port_no);
+ if (!vport)
+ return ERR_PTR(-ENODEV);
+ return vport;
+ } else
+ return ERR_PTR(-EINVAL);
+}
+
+static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr **a = info->attrs;
+ struct ovs_header *ovs_header = info->userhdr;
+ struct vport_parms parms;
+ struct sk_buff *reply;
+ struct vport *vport;
+ struct datapath *dp;
+ u32 port_no;
+ int err;
+
+ if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
+ !a[OVS_VPORT_ATTR_UPCALL_PID])
+ return -EINVAL;
+
+ port_no = a[OVS_VPORT_ATTR_PORT_NO]
+ ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0;
+ if (port_no >= DP_MAX_PORTS)
+ return -EFBIG;
+
+ reply = ovs_vport_cmd_alloc_info();
+ if (!reply)
+ return -ENOMEM;
+
+ ovs_lock();
+restart:
+ dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
+ err = -ENODEV;
+ if (!dp)
+ goto exit_unlock_free;
+
+ if (port_no) {
+ vport = ovs_vport_ovsl(dp, port_no);
+ err = -EBUSY;
+ if (vport)
+ goto exit_unlock_free;
+ } else {
+ for (port_no = 1; ; port_no++) {
+ if (port_no >= DP_MAX_PORTS) {
+ err = -EFBIG;
+ goto exit_unlock_free;
+ }
+ vport = ovs_vport_ovsl(dp, port_no);
+ if (!vport)
+ break;
+ }
+ }
+
+ parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
+ parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
+ parms.options = a[OVS_VPORT_ATTR_OPTIONS];
+ parms.dp = dp;
+ parms.port_no = port_no;
+ parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID];
+
+ vport = new_vport(&parms);
+ err = PTR_ERR(vport);
+ if (IS_ERR(vport)) {
+ if (err == -EAGAIN)
+ goto restart;
+ goto exit_unlock_free;
+ }
+
+ err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
+ info->snd_seq, 0, OVS_VPORT_CMD_NEW);
+ BUG_ON(err < 0);
+ ovs_unlock();
+
+ ovs_notify(&dp_vport_genl_family, reply, info);
+ return 0;
+
+exit_unlock_free:
+ ovs_unlock();
+ kfree_skb(reply);
+ return err;
+}
+
+static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr **a = info->attrs;
+ struct sk_buff *reply;
+ struct vport *vport;
+ int err;
+
+ reply = ovs_vport_cmd_alloc_info();
+ if (!reply)
+ return -ENOMEM;
+
+ ovs_lock();
+ vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
+ err = PTR_ERR(vport);
+ if (IS_ERR(vport))
+ goto exit_unlock_free;
+
+ if (a[OVS_VPORT_ATTR_TYPE] &&
+ nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) {
+ err = -EINVAL;
+ goto exit_unlock_free;
+ }
+
+ if (a[OVS_VPORT_ATTR_OPTIONS]) {
+ err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
+ if (err)
+ goto exit_unlock_free;
+ }
+
+
+ if (a[OVS_VPORT_ATTR_UPCALL_PID]) {
+ struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID];
+
+ err = ovs_vport_set_upcall_portids(vport, ids);
+ if (err)
+ goto exit_unlock_free;
+ }
+
+ err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
+ info->snd_seq, 0, OVS_VPORT_CMD_NEW);
+ BUG_ON(err < 0);
+
+ ovs_unlock();
+ ovs_notify(&dp_vport_genl_family, reply, info);
+ return 0;
+
+exit_unlock_free:
+ ovs_unlock();
+ kfree_skb(reply);
+ return err;
+}
+
+static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr **a = info->attrs;
+ struct sk_buff *reply;
+ struct vport *vport;
+ int err;
+
+ reply = ovs_vport_cmd_alloc_info();
+ if (!reply)
+ return -ENOMEM;
+
+ ovs_lock();
+ vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
+ err = PTR_ERR(vport);
+ if (IS_ERR(vport))
+ goto exit_unlock_free;
+
+ if (vport->port_no == OVSP_LOCAL) {
+ err = -EINVAL;
+ goto exit_unlock_free;
+ }
+
+ err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
+ info->snd_seq, 0, OVS_VPORT_CMD_DEL);
+ BUG_ON(err < 0);
+ ovs_dp_detach_port(vport);
+ ovs_unlock();
+
+ ovs_notify(&dp_vport_genl_family, reply, info);
+ return 0;
+
+exit_unlock_free:
+ ovs_unlock();
+ kfree_skb(reply);
+ return err;
+}
+
+static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr **a = info->attrs;
+ struct ovs_header *ovs_header = info->userhdr;
+ struct sk_buff *reply;
+ struct vport *vport;
+ int err;
+
+ reply = ovs_vport_cmd_alloc_info();
+ if (!reply)
+ return -ENOMEM;
+
+ rcu_read_lock();
+ vport = lookup_vport(sock_net(skb->sk), ovs_header, a);
+ err = PTR_ERR(vport);
+ if (IS_ERR(vport))
+ goto exit_unlock_free;
+ err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
+ info->snd_seq, 0, OVS_VPORT_CMD_NEW);
+ BUG_ON(err < 0);
+ rcu_read_unlock();
+
+ return genlmsg_reply(reply, info);
+
+exit_unlock_free:
+ rcu_read_unlock();
+ kfree_skb(reply);
+ return err;
+}
+
+static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
+ struct datapath *dp;
+ int bucket = cb->args[0], skip = cb->args[1];
+ int i, j = 0;
+
+ rcu_read_lock();
+ dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex);
+ if (!dp) {
+ rcu_read_unlock();
+ return -ENODEV;
+ }
+ for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
+ struct vport *vport;
+
+ j = 0;
+ hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) {
+ if (j >= skip &&
+ ovs_vport_cmd_fill_info(vport, skb,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq,
+ NLM_F_MULTI,
+ OVS_VPORT_CMD_NEW) < 0)
+ goto out;
+
+ j++;
+ }
+ skip = 0;
+ }
+out:
+ rcu_read_unlock();
+
+ cb->args[0] = i;
+ cb->args[1] = j;
+
+ return skb->len;
+}
+
+static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
+ [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
+ [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
+ [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
+ [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
+ [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 },
+ [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
+};
+
+static const struct genl_ops dp_vport_genl_ops[] = {
+ { .cmd = OVS_VPORT_CMD_NEW,
+ .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
+ .policy = vport_policy,
+ .doit = ovs_vport_cmd_new
+ },
+ { .cmd = OVS_VPORT_CMD_DEL,
+ .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
+ .policy = vport_policy,
+ .doit = ovs_vport_cmd_del
+ },
+ { .cmd = OVS_VPORT_CMD_GET,
+ .flags = 0, /* OK for unprivileged users. */
+ .policy = vport_policy,
+ .doit = ovs_vport_cmd_get,
+ .dumpit = ovs_vport_cmd_dump
+ },
+ { .cmd = OVS_VPORT_CMD_SET,
+ .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
+ .policy = vport_policy,
+ .doit = ovs_vport_cmd_set,
+ },
+};
+
+struct genl_family dp_vport_genl_family = {
+ .id = GENL_ID_GENERATE,
+ .hdrsize = sizeof(struct ovs_header),
+ .name = OVS_VPORT_FAMILY,
+ .version = OVS_VPORT_VERSION,
+ .maxattr = OVS_VPORT_ATTR_MAX,
+ .netnsok = true,
+ .parallel_ops = true,
+ .ops = dp_vport_genl_ops,
+ .n_ops = ARRAY_SIZE(dp_vport_genl_ops),
+ .mcgrps = &ovs_dp_vport_multicast_group,
+ .n_mcgrps = 1,
+};
+
+static struct genl_family * const dp_genl_families[] = {
+ &dp_datapath_genl_family,
+ &dp_vport_genl_family,
+ &dp_flow_genl_family,
+ &dp_packet_genl_family,
+};
+
+static void dp_unregister_genl(int n_families)
+{
+ int i;
+
+ for (i = 0; i < n_families; i++)
+ genl_unregister_family(dp_genl_families[i]);
+}
+
+static int dp_register_genl(void)
+{
+ int err;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
+
+ err = genl_register_family(dp_genl_families[i]);
+ if (err)
+ goto error;
+ }
+
+ return 0;
+
+error:
+ dp_unregister_genl(i);
+ return err;
+}
+
+static int __net_init ovs_init_net(struct net *net)
+{
+ struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
+
+ INIT_LIST_HEAD(&ovs_net->dps);
+ INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq);
+ ovs_ct_init(net);
+ return 0;
+}
+
+static void __net_exit list_vports_from_net(struct net *net, struct net *dnet,
+ struct list_head *head)
+{
+ struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
+ struct datapath *dp;
+
+ list_for_each_entry(dp, &ovs_net->dps, list_node) {
+ int i;
+
+ for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
+ struct vport *vport;
+
+ hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) {
+ if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL)
+ continue;
+
+ if (dev_net(vport->dev) == dnet)
+ list_add(&vport->detach_list, head);
+ }
+ }
+ }
+}
+
+static void __net_exit ovs_exit_net(struct net *dnet)
+{
+ struct datapath *dp, *dp_next;
+ struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id);
+ struct vport *vport, *vport_next;
+ struct net *net;
+ LIST_HEAD(head);
+
+ ovs_ct_exit(dnet);
+ ovs_lock();
+ list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node)
+ __dp_destroy(dp);
+
+ rtnl_lock();
+ for_each_net(net)
+ list_vports_from_net(net, dnet, &head);
+ rtnl_unlock();
+
+ /* Detach all vports from given namespace. */
+ list_for_each_entry_safe(vport, vport_next, &head, detach_list) {
+ list_del(&vport->detach_list);
+ ovs_dp_detach_port(vport);
+ }
+
+ ovs_unlock();
+
+ cancel_work_sync(&ovs_net->dp_notify_work);
+}
+
+static struct pernet_operations ovs_net_ops = {
+ .init = ovs_init_net,
+ .exit = ovs_exit_net,
+ .id = &ovs_net_id,
+ .size = sizeof(struct ovs_net),
+};
+
+static int __init dp_init(void)
+{
+ int err;
+
+ BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
+
+ pr_info("Open vSwitch switching datapath\n");
+
+ err = action_fifos_init();
+ if (err)
+ goto error;
+
+ err = ovs_internal_dev_rtnl_link_register();
+ if (err)
+ goto error_action_fifos_exit;
+
+ err = ovs_flow_init();
+ if (err)
+ goto error_unreg_rtnl_link;
+
+ err = ovs_vport_init();
+ if (err)
+ goto error_flow_exit;
+
+ err = register_pernet_device(&ovs_net_ops);
+ if (err)
+ goto error_vport_exit;
+
+ err = register_netdevice_notifier(&ovs_dp_device_notifier);
+ if (err)
+ goto error_netns_exit;
+
+ err = ovs_netdev_init();
+ if (err)
+ goto error_unreg_notifier;
+
+ err = dp_register_genl();
+ if (err < 0)
+ goto error_unreg_netdev;
+
+ return 0;
+
+error_unreg_netdev:
+ ovs_netdev_exit();
+error_unreg_notifier:
+ unregister_netdevice_notifier(&ovs_dp_device_notifier);
+error_netns_exit:
+ unregister_pernet_device(&ovs_net_ops);
+error_vport_exit:
+ ovs_vport_exit();
+error_flow_exit:
+ ovs_flow_exit();
+error_unreg_rtnl_link:
+ ovs_internal_dev_rtnl_link_unregister();
+error_action_fifos_exit:
+ action_fifos_exit();
+error:
+ return err;
+}
+
+static void dp_cleanup(void)
+{
+ dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
+ ovs_netdev_exit();
+ unregister_netdevice_notifier(&ovs_dp_device_notifier);
+ unregister_pernet_device(&ovs_net_ops);
+ rcu_barrier();
+ ovs_vport_exit();
+ ovs_flow_exit();
+ ovs_internal_dev_rtnl_link_unregister();
+ action_fifos_exit();
+}
+
+module_init(dp_init);
+module_exit(dp_cleanup);
+
+MODULE_DESCRIPTION("Open vSwitch switching datapath");
+MODULE_LICENSE("GPL");
diff --git a/net/openvswitch/datapath.h b/net/openvswitch/datapath.h
new file mode 100644
index 0000000..67bdecd
--- /dev/null
+++ b/net/openvswitch/datapath.h
@@ -0,0 +1,216 @@
+/*
+ * Copyright (c) 2007-2014 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifndef DATAPATH_H
+#define DATAPATH_H 1
+
+#include <asm/page.h>
+#include <linux/kernel.h>
+#include <linux/mutex.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/u64_stats_sync.h>
+#include <net/ip_tunnels.h>
+
+#include "conntrack.h"
+#include "flow.h"
+#include "flow_table.h"
+
+#define DP_MAX_PORTS USHRT_MAX
+#define DP_VPORT_HASH_BUCKETS 1024
+
+#define SAMPLE_ACTION_DEPTH 3
+
+/**
+ * struct dp_stats_percpu - per-cpu packet processing statistics for a given
+ * datapath.
+ * @n_hit: Number of received packets for which a matching flow was found in
+ * the flow table.
+ * @n_miss: Number of received packets that had no matching flow in the flow
+ * table. The sum of @n_hit and @n_miss is the number of packets that have
+ * been received by the datapath.
+ * @n_lost: Number of received packets that had no matching flow in the flow
+ * table that could not be sent to userspace (normally due to an overflow in
+ * one of the datapath's queues).
+ * @n_mask_hit: Number of masks looked up for flow match.
+ * @n_mask_hit / (@n_hit + @n_missed) will be the average masks looked
+ * up per packet.
+ */
+struct dp_stats_percpu {
+ u64 n_hit;
+ u64 n_missed;
+ u64 n_lost;
+ u64 n_mask_hit;
+ struct u64_stats_sync syncp;
+};
+
+/**
+ * struct datapath - datapath for flow-based packet switching
+ * @rcu: RCU callback head for deferred destruction.
+ * @list_node: Element in global 'dps' list.
+ * @table: flow table.
+ * @ports: Hash table for ports. %OVSP_LOCAL port always exists. Protected by
+ * ovs_mutex and RCU.
+ * @stats_percpu: Per-CPU datapath statistics.
+ * @net: Reference to net namespace.
+ *
+ * Context: See the comment on locking at the top of datapath.c for additional
+ * locking information.
+ */
+struct datapath {
+ struct rcu_head rcu;
+ struct list_head list_node;
+
+ /* Flow table. */
+ struct flow_table table;
+
+ /* Switch ports. */
+ struct hlist_head *ports;
+
+ /* Stats. */
+ struct dp_stats_percpu __percpu *stats_percpu;
+
+ /* Network namespace ref. */
+ possible_net_t net;
+
+ u32 user_features;
+};
+
+/**
+ * struct ovs_skb_cb - OVS data in skb CB
+ * @input_vport: The original vport packet came in on. This value is cached
+ * when a packet is received by OVS.
+ * @mru: The maximum received fragement size; 0 if the packet is not
+ * fragmented.
+ */
+struct ovs_skb_cb {
+ struct vport *input_vport;
+ u16 mru;
+};
+#define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb)
+
+/**
+ * struct dp_upcall - metadata to include with a packet to send to userspace
+ * @cmd: One of %OVS_PACKET_CMD_*.
+ * @userdata: If nonnull, its variable-length value is passed to userspace as
+ * %OVS_PACKET_ATTR_USERDATA.
+ * @portid: Netlink portid to which packet should be sent. If @portid is 0
+ * then no packet is sent and the packet is accounted in the datapath's @n_lost
+ * counter.
+ * @egress_tun_info: If nonnull, becomes %OVS_PACKET_ATTR_EGRESS_TUN_KEY.
+ * @mru: If not zero, Maximum received IP fragment size.
+ */
+struct dp_upcall_info {
+ struct ip_tunnel_info *egress_tun_info;
+ const struct nlattr *userdata;
+ const struct nlattr *actions;
+ int actions_len;
+ u32 portid;
+ u8 cmd;
+ u16 mru;
+};
+
+/**
+ * struct ovs_net - Per net-namespace data for ovs.
+ * @dps: List of datapaths to enable dumping them all out.
+ * Protected by genl_mutex.
+ */
+struct ovs_net {
+ struct list_head dps;
+ struct work_struct dp_notify_work;
+
+ /* Module reference for configuring conntrack. */
+ bool xt_label;
+};
+
+extern int ovs_net_id;
+void ovs_lock(void);
+void ovs_unlock(void);
+
+#ifdef CONFIG_LOCKDEP
+int lockdep_ovsl_is_held(void);
+#else
+#define lockdep_ovsl_is_held() 1
+#endif
+
+#define ASSERT_OVSL() WARN_ON(!lockdep_ovsl_is_held())
+#define ovsl_dereference(p) \
+ rcu_dereference_protected(p, lockdep_ovsl_is_held())
+#define rcu_dereference_ovsl(p) \
+ rcu_dereference_check(p, lockdep_ovsl_is_held())
+
+static inline struct net *ovs_dp_get_net(const struct datapath *dp)
+{
+ return read_pnet(&dp->net);
+}
+
+static inline void ovs_dp_set_net(struct datapath *dp, struct net *net)
+{
+ write_pnet(&dp->net, net);
+}
+
+struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no);
+
+static inline struct vport *ovs_vport_rcu(const struct datapath *dp, int port_no)
+{
+ WARN_ON_ONCE(!rcu_read_lock_held());
+ return ovs_lookup_vport(dp, port_no);
+}
+
+static inline struct vport *ovs_vport_ovsl_rcu(const struct datapath *dp, int port_no)
+{
+ WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held());
+ return ovs_lookup_vport(dp, port_no);
+}
+
+static inline struct vport *ovs_vport_ovsl(const struct datapath *dp, int port_no)
+{
+ ASSERT_OVSL();
+ return ovs_lookup_vport(dp, port_no);
+}
+
+extern struct notifier_block ovs_dp_device_notifier;
+extern struct genl_family dp_vport_genl_family;
+
+void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key);
+void ovs_dp_detach_port(struct vport *);
+int ovs_dp_upcall(struct datapath *, struct sk_buff *,
+ const struct sw_flow_key *, const struct dp_upcall_info *);
+
+const char *ovs_dp_name(const struct datapath *dp);
+struct sk_buff *ovs_vport_cmd_build_info(struct vport *, u32 pid, u32 seq,
+ u8 cmd);
+
+int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb,
+ const struct sw_flow_actions *, struct sw_flow_key *);
+
+void ovs_dp_notify_wq(struct work_struct *work);
+
+int action_fifos_init(void);
+void action_fifos_exit(void);
+
+/* 'KEY' must not have any bits set outside of the 'MASK' */
+#define OVS_MASKED(OLD, KEY, MASK) ((KEY) | ((OLD) & ~(MASK)))
+#define OVS_SET_MASKED(OLD, KEY, MASK) ((OLD) = OVS_MASKED(OLD, KEY, MASK))
+
+#define OVS_NLERR(logging_allowed, fmt, ...) \
+do { \
+ if (logging_allowed && net_ratelimit()) \
+ pr_info("netlink: " fmt "\n", ##__VA_ARGS__); \
+} while (0)
+#endif /* datapath.h */
diff --git a/net/openvswitch/dp_notify.c b/net/openvswitch/dp_notify.c
new file mode 100644
index 0000000..653d073
--- /dev/null
+++ b/net/openvswitch/dp_notify.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2007-2012 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#include <linux/netdevice.h>
+#include <net/genetlink.h>
+#include <net/netns/generic.h>
+
+#include "datapath.h"
+#include "vport-internal_dev.h"
+#include "vport-netdev.h"
+
+static void dp_detach_port_notify(struct vport *vport)
+{
+ struct sk_buff *notify;
+ struct datapath *dp;
+
+ dp = vport->dp;
+ notify = ovs_vport_cmd_build_info(vport, 0, 0,
+ OVS_VPORT_CMD_DEL);
+ ovs_dp_detach_port(vport);
+ if (IS_ERR(notify)) {
+ genl_set_err(&dp_vport_genl_family, ovs_dp_get_net(dp), 0,
+ 0, PTR_ERR(notify));
+ return;
+ }
+
+ genlmsg_multicast_netns(&dp_vport_genl_family,
+ ovs_dp_get_net(dp), notify, 0,
+ 0, GFP_KERNEL);
+}
+
+void ovs_dp_notify_wq(struct work_struct *work)
+{
+ struct ovs_net *ovs_net = container_of(work, struct ovs_net, dp_notify_work);
+ struct datapath *dp;
+
+ ovs_lock();
+ list_for_each_entry(dp, &ovs_net->dps, list_node) {
+ int i;
+
+ for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
+ struct vport *vport;
+ struct hlist_node *n;
+
+ hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) {
+ if (vport->ops->type == OVS_VPORT_TYPE_INTERNAL)
+ continue;
+
+ if (!(vport->dev->priv_flags & IFF_OVS_DATAPATH))
+ dp_detach_port_notify(vport);
+ }
+ }
+ }
+ ovs_unlock();
+}
+
+static int dp_device_event(struct notifier_block *unused, unsigned long event,
+ void *ptr)
+{
+ struct ovs_net *ovs_net;
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+ struct vport *vport = NULL;
+
+ if (!ovs_is_internal_dev(dev))
+ vport = ovs_netdev_get_vport(dev);
+
+ if (!vport)
+ return NOTIFY_DONE;
+
+ if (event == NETDEV_UNREGISTER) {
+ /* upper_dev_unlink and decrement promisc immediately */
+ ovs_netdev_detach_dev(vport);
+
+ /* schedule vport destroy, dev_put and genl notification */
+ ovs_net = net_generic(dev_net(dev), ovs_net_id);
+ queue_work(system_wq, &ovs_net->dp_notify_work);
+ }
+
+ return NOTIFY_DONE;
+}
+
+struct notifier_block ovs_dp_device_notifier = {
+ .notifier_call = dp_device_event
+};
diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c
new file mode 100644
index 0000000..0ea128e
--- /dev/null
+++ b/net/openvswitch/flow.c
@@ -0,0 +1,745 @@
+/*
+ * Copyright (c) 2007-2014 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#include <linux/uaccess.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <net/llc_pdu.h>
+#include <linux/kernel.h>
+#include <linux/jhash.h>
+#include <linux/jiffies.h>
+#include <linux/llc.h>
+#include <linux/module.h>
+#include <linux/in.h>
+#include <linux/rcupdate.h>
+#include <linux/if_arp.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/mpls.h>
+#include <linux/sctp.h>
+#include <linux/smp.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/icmp.h>
+#include <linux/icmpv6.h>
+#include <linux/rculist.h>
+#include <net/ip.h>
+#include <net/ip_tunnels.h>
+#include <net/ipv6.h>
+#include <net/mpls.h>
+#include <net/ndisc.h>
+
+#include "conntrack.h"
+#include "datapath.h"
+#include "flow.h"
+#include "flow_netlink.h"
+#include "vport.h"
+
+u64 ovs_flow_used_time(unsigned long flow_jiffies)
+{
+ struct timespec cur_ts;
+ u64 cur_ms, idle_ms;
+
+ ktime_get_ts(&cur_ts);
+ idle_ms = jiffies_to_msecs(jiffies - flow_jiffies);
+ cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC +
+ cur_ts.tv_nsec / NSEC_PER_MSEC;
+
+ return cur_ms - idle_ms;
+}
+
+#define TCP_FLAGS_BE16(tp) (*(__be16 *)&tcp_flag_word(tp) & htons(0x0FFF))
+
+void ovs_flow_stats_update(struct sw_flow *flow, __be16 tcp_flags,
+ const struct sk_buff *skb)
+{
+ struct flow_stats *stats;
+ int node = numa_node_id();
+ int len = skb->len + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
+
+ stats = rcu_dereference(flow->stats[node]);
+
+ /* Check if already have node-specific stats. */
+ if (likely(stats)) {
+ spin_lock(&stats->lock);
+ /* Mark if we write on the pre-allocated stats. */
+ if (node == 0 && unlikely(flow->stats_last_writer != node))
+ flow->stats_last_writer = node;
+ } else {
+ stats = rcu_dereference(flow->stats[0]); /* Pre-allocated. */
+ spin_lock(&stats->lock);
+
+ /* If the current NUMA-node is the only writer on the
+ * pre-allocated stats keep using them.
+ */
+ if (unlikely(flow->stats_last_writer != node)) {
+ /* A previous locker may have already allocated the
+ * stats, so we need to check again. If node-specific
+ * stats were already allocated, we update the pre-
+ * allocated stats as we have already locked them.
+ */
+ if (likely(flow->stats_last_writer != NUMA_NO_NODE)
+ && likely(!rcu_access_pointer(flow->stats[node]))) {
+ /* Try to allocate node-specific stats. */
+ struct flow_stats *new_stats;
+
+ new_stats =
+ kmem_cache_alloc_node(flow_stats_cache,
+ GFP_NOWAIT |
+ __GFP_THISNODE |
+ __GFP_NOWARN |
+ __GFP_NOMEMALLOC,
+ node);
+ if (likely(new_stats)) {
+ new_stats->used = jiffies;
+ new_stats->packet_count = 1;
+ new_stats->byte_count = len;
+ new_stats->tcp_flags = tcp_flags;
+ spin_lock_init(&new_stats->lock);
+
+ rcu_assign_pointer(flow->stats[node],
+ new_stats);
+ goto unlock;
+ }
+ }
+ flow->stats_last_writer = node;
+ }
+ }
+
+ stats->used = jiffies;
+ stats->packet_count++;
+ stats->byte_count += len;
+ stats->tcp_flags |= tcp_flags;
+unlock:
+ spin_unlock(&stats->lock);
+}
+
+/* Must be called with rcu_read_lock or ovs_mutex. */
+void ovs_flow_stats_get(const struct sw_flow *flow,
+ struct ovs_flow_stats *ovs_stats,
+ unsigned long *used, __be16 *tcp_flags)
+{
+ int node;
+
+ *used = 0;
+ *tcp_flags = 0;
+ memset(ovs_stats, 0, sizeof(*ovs_stats));
+
+ for_each_node(node) {
+ struct flow_stats *stats = rcu_dereference_ovsl(flow->stats[node]);
+
+ if (stats) {
+ /* Local CPU may write on non-local stats, so we must
+ * block bottom-halves here.
+ */
+ spin_lock_bh(&stats->lock);
+ if (!*used || time_after(stats->used, *used))
+ *used = stats->used;
+ *tcp_flags |= stats->tcp_flags;
+ ovs_stats->n_packets += stats->packet_count;
+ ovs_stats->n_bytes += stats->byte_count;
+ spin_unlock_bh(&stats->lock);
+ }
+ }
+}
+
+/* Called with ovs_mutex. */
+void ovs_flow_stats_clear(struct sw_flow *flow)
+{
+ int node;
+
+ for_each_node(node) {
+ struct flow_stats *stats = ovsl_dereference(flow->stats[node]);
+
+ if (stats) {
+ spin_lock_bh(&stats->lock);
+ stats->used = 0;
+ stats->packet_count = 0;
+ stats->byte_count = 0;
+ stats->tcp_flags = 0;
+ spin_unlock_bh(&stats->lock);
+ }
+ }
+}
+
+static int check_header(struct sk_buff *skb, int len)
+{
+ if (unlikely(skb->len < len))
+ return -EINVAL;
+ if (unlikely(!pskb_may_pull(skb, len)))
+ return -ENOMEM;
+ return 0;
+}
+
+static bool arphdr_ok(struct sk_buff *skb)
+{
+ return pskb_may_pull(skb, skb_network_offset(skb) +
+ sizeof(struct arp_eth_header));
+}
+
+static int check_iphdr(struct sk_buff *skb)
+{
+ unsigned int nh_ofs = skb_network_offset(skb);
+ unsigned int ip_len;
+ int err;
+
+ err = check_header(skb, nh_ofs + sizeof(struct iphdr));
+ if (unlikely(err))
+ return err;
+
+ ip_len = ip_hdrlen(skb);
+ if (unlikely(ip_len < sizeof(struct iphdr) ||
+ skb->len < nh_ofs + ip_len))
+ return -EINVAL;
+
+ skb_set_transport_header(skb, nh_ofs + ip_len);
+ return 0;
+}
+
+static bool tcphdr_ok(struct sk_buff *skb)
+{
+ int th_ofs = skb_transport_offset(skb);
+ int tcp_len;
+
+ if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr))))
+ return false;
+
+ tcp_len = tcp_hdrlen(skb);
+ if (unlikely(tcp_len < sizeof(struct tcphdr) ||
+ skb->len < th_ofs + tcp_len))
+ return false;
+
+ return true;
+}
+
+static bool udphdr_ok(struct sk_buff *skb)
+{
+ return pskb_may_pull(skb, skb_transport_offset(skb) +
+ sizeof(struct udphdr));
+}
+
+static bool sctphdr_ok(struct sk_buff *skb)
+{
+ return pskb_may_pull(skb, skb_transport_offset(skb) +
+ sizeof(struct sctphdr));
+}
+
+static bool icmphdr_ok(struct sk_buff *skb)
+{
+ return pskb_may_pull(skb, skb_transport_offset(skb) +
+ sizeof(struct icmphdr));
+}
+
+static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
+{
+ unsigned int nh_ofs = skb_network_offset(skb);
+ unsigned int nh_len;
+ int payload_ofs;
+ struct ipv6hdr *nh;
+ uint8_t nexthdr;
+ __be16 frag_off;
+ int err;
+
+ err = check_header(skb, nh_ofs + sizeof(*nh));
+ if (unlikely(err))
+ return err;
+
+ nh = ipv6_hdr(skb);
+ nexthdr = nh->nexthdr;
+ payload_ofs = (u8 *)(nh + 1) - skb->data;
+
+ key->ip.proto = NEXTHDR_NONE;
+ key->ip.tos = ipv6_get_dsfield(nh);
+ key->ip.ttl = nh->hop_limit;
+ key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL);
+ key->ipv6.addr.src = nh->saddr;
+ key->ipv6.addr.dst = nh->daddr;
+
+ payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off);
+
+ if (frag_off) {
+ if (frag_off & htons(~0x7))
+ key->ip.frag = OVS_FRAG_TYPE_LATER;
+ else
+ key->ip.frag = OVS_FRAG_TYPE_FIRST;
+ } else {
+ key->ip.frag = OVS_FRAG_TYPE_NONE;
+ }
+
+ /* Delayed handling of error in ipv6_skip_exthdr() as it
+ * always sets frag_off to a valid value which may be
+ * used to set key->ip.frag above.
+ */
+ if (unlikely(payload_ofs < 0))
+ return -EPROTO;
+
+ nh_len = payload_ofs - nh_ofs;
+ skb_set_transport_header(skb, nh_ofs + nh_len);
+ key->ip.proto = nexthdr;
+ return nh_len;
+}
+
+static bool icmp6hdr_ok(struct sk_buff *skb)
+{
+ return pskb_may_pull(skb, skb_transport_offset(skb) +
+ sizeof(struct icmp6hdr));
+}
+
+static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
+{
+ struct qtag_prefix {
+ __be16 eth_type; /* ETH_P_8021Q */
+ __be16 tci;
+ };
+ struct qtag_prefix *qp;
+
+ if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16)))
+ return 0;
+
+ if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) +
+ sizeof(__be16))))
+ return -ENOMEM;
+
+ qp = (struct qtag_prefix *) skb->data;
+ key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT);
+ __skb_pull(skb, sizeof(struct qtag_prefix));
+
+ return 0;
+}
+
+static __be16 parse_ethertype(struct sk_buff *skb)
+{
+ struct llc_snap_hdr {
+ u8 dsap; /* Always 0xAA */
+ u8 ssap; /* Always 0xAA */
+ u8 ctrl;
+ u8 oui[3];
+ __be16 ethertype;
+ };
+ struct llc_snap_hdr *llc;
+ __be16 proto;
+
+ proto = *(__be16 *) skb->data;
+ __skb_pull(skb, sizeof(__be16));
+
+ if (eth_proto_is_802_3(proto))
+ return proto;
+
+ if (skb->len < sizeof(struct llc_snap_hdr))
+ return htons(ETH_P_802_2);
+
+ if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr))))
+ return htons(0);
+
+ llc = (struct llc_snap_hdr *) skb->data;
+ if (llc->dsap != LLC_SAP_SNAP ||
+ llc->ssap != LLC_SAP_SNAP ||
+ (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0)
+ return htons(ETH_P_802_2);
+
+ __skb_pull(skb, sizeof(struct llc_snap_hdr));
+
+ if (eth_proto_is_802_3(llc->ethertype))
+ return llc->ethertype;
+
+ return htons(ETH_P_802_2);
+}
+
+static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key,
+ int nh_len)
+{
+ struct icmp6hdr *icmp = icmp6_hdr(skb);
+
+ /* The ICMPv6 type and code fields use the 16-bit transport port
+ * fields, so we need to store them in 16-bit network byte order.
+ */
+ key->tp.src = htons(icmp->icmp6_type);
+ key->tp.dst = htons(icmp->icmp6_code);
+ memset(&key->ipv6.nd, 0, sizeof(key->ipv6.nd));
+
+ if (icmp->icmp6_code == 0 &&
+ (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION ||
+ icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) {
+ int icmp_len = skb->len - skb_transport_offset(skb);
+ struct nd_msg *nd;
+ int offset;
+
+ /* In order to process neighbor discovery options, we need the
+ * entire packet.
+ */
+ if (unlikely(icmp_len < sizeof(*nd)))
+ return 0;
+
+ if (unlikely(skb_linearize(skb)))
+ return -ENOMEM;
+
+ nd = (struct nd_msg *)skb_transport_header(skb);
+ key->ipv6.nd.target = nd->target;
+
+ icmp_len -= sizeof(*nd);
+ offset = 0;
+ while (icmp_len >= 8) {
+ struct nd_opt_hdr *nd_opt =
+ (struct nd_opt_hdr *)(nd->opt + offset);
+ int opt_len = nd_opt->nd_opt_len * 8;
+
+ if (unlikely(!opt_len || opt_len > icmp_len))
+ return 0;
+
+ /* Store the link layer address if the appropriate
+ * option is provided. It is considered an error if
+ * the same link layer option is specified twice.
+ */
+ if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR
+ && opt_len == 8) {
+ if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll)))
+ goto invalid;
+ ether_addr_copy(key->ipv6.nd.sll,
+ &nd->opt[offset+sizeof(*nd_opt)]);
+ } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR
+ && opt_len == 8) {
+ if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll)))
+ goto invalid;
+ ether_addr_copy(key->ipv6.nd.tll,
+ &nd->opt[offset+sizeof(*nd_opt)]);
+ }
+
+ icmp_len -= opt_len;
+ offset += opt_len;
+ }
+ }
+
+ return 0;
+
+invalid:
+ memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target));
+ memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll));
+ memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll));
+
+ return 0;
+}
+
+/**
+ * key_extract - extracts a flow key from an Ethernet frame.
+ * @skb: sk_buff that contains the frame, with skb->data pointing to the
+ * Ethernet header
+ * @key: output flow key
+ *
+ * The caller must ensure that skb->len >= ETH_HLEN.
+ *
+ * Returns 0 if successful, otherwise a negative errno value.
+ *
+ * Initializes @skb header pointers as follows:
+ *
+ * - skb->mac_header: the Ethernet header.
+ *
+ * - skb->network_header: just past the Ethernet header, or just past the
+ * VLAN header, to the first byte of the Ethernet payload.
+ *
+ * - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6
+ * on output, then just past the IP header, if one is present and
+ * of a correct length, otherwise the same as skb->network_header.
+ * For other key->eth.type values it is left untouched.
+ */
+static int key_extract(struct sk_buff *skb, struct sw_flow_key *key)
+{
+ int error;
+ struct ethhdr *eth;
+
+ /* Flags are always used as part of stats */
+ key->tp.flags = 0;
+
+ skb_reset_mac_header(skb);
+
+ /* Link layer. We are guaranteed to have at least the 14 byte Ethernet
+ * header in the linear data area.
+ */
+ eth = eth_hdr(skb);
+ ether_addr_copy(key->eth.src, eth->h_source);
+ ether_addr_copy(key->eth.dst, eth->h_dest);
+
+ __skb_pull(skb, 2 * ETH_ALEN);
+ /* We are going to push all headers that we pull, so no need to
+ * update skb->csum here.
+ */
+
+ key->eth.tci = 0;
+ if (skb_vlan_tag_present(skb))
+ key->eth.tci = htons(skb->vlan_tci);
+ else if (eth->h_proto == htons(ETH_P_8021Q))
+ if (unlikely(parse_vlan(skb, key)))
+ return -ENOMEM;
+
+ key->eth.type = parse_ethertype(skb);
+ if (unlikely(key->eth.type == htons(0)))
+ return -ENOMEM;
+
+ skb_reset_network_header(skb);
+ skb_reset_mac_len(skb);
+ __skb_push(skb, skb->data - skb_mac_header(skb));
+
+ /* Network layer. */
+ if (key->eth.type == htons(ETH_P_IP)) {
+ struct iphdr *nh;
+ __be16 offset;
+
+ error = check_iphdr(skb);
+ if (unlikely(error)) {
+ memset(&key->ip, 0, sizeof(key->ip));
+ memset(&key->ipv4, 0, sizeof(key->ipv4));
+ if (error == -EINVAL) {
+ skb->transport_header = skb->network_header;
+ error = 0;
+ }
+ return error;
+ }
+
+ nh = ip_hdr(skb);
+ key->ipv4.addr.src = nh->saddr;
+ key->ipv4.addr.dst = nh->daddr;
+
+ key->ip.proto = nh->protocol;
+ key->ip.tos = nh->tos;
+ key->ip.ttl = nh->ttl;
+
+ offset = nh->frag_off & htons(IP_OFFSET);
+ if (offset) {
+ key->ip.frag = OVS_FRAG_TYPE_LATER;
+ return 0;
+ }
+ if (nh->frag_off & htons(IP_MF) ||
+ skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
+ key->ip.frag = OVS_FRAG_TYPE_FIRST;
+ else
+ key->ip.frag = OVS_FRAG_TYPE_NONE;
+
+ /* Transport layer. */
+ if (key->ip.proto == IPPROTO_TCP) {
+ if (tcphdr_ok(skb)) {
+ struct tcphdr *tcp = tcp_hdr(skb);
+ key->tp.src = tcp->source;
+ key->tp.dst = tcp->dest;
+ key->tp.flags = TCP_FLAGS_BE16(tcp);
+ } else {
+ memset(&key->tp, 0, sizeof(key->tp));
+ }
+
+ } else if (key->ip.proto == IPPROTO_UDP) {
+ if (udphdr_ok(skb)) {
+ struct udphdr *udp = udp_hdr(skb);
+ key->tp.src = udp->source;
+ key->tp.dst = udp->dest;
+ } else {
+ memset(&key->tp, 0, sizeof(key->tp));
+ }
+ } else if (key->ip.proto == IPPROTO_SCTP) {
+ if (sctphdr_ok(skb)) {
+ struct sctphdr *sctp = sctp_hdr(skb);
+ key->tp.src = sctp->source;
+ key->tp.dst = sctp->dest;
+ } else {
+ memset(&key->tp, 0, sizeof(key->tp));
+ }
+ } else if (key->ip.proto == IPPROTO_ICMP) {
+ if (icmphdr_ok(skb)) {
+ struct icmphdr *icmp = icmp_hdr(skb);
+ /* The ICMP type and code fields use the 16-bit
+ * transport port fields, so we need to store
+ * them in 16-bit network byte order. */
+ key->tp.src = htons(icmp->type);
+ key->tp.dst = htons(icmp->code);
+ } else {
+ memset(&key->tp, 0, sizeof(key->tp));
+ }
+ }
+
+ } else if (key->eth.type == htons(ETH_P_ARP) ||
+ key->eth.type == htons(ETH_P_RARP)) {
+ struct arp_eth_header *arp;
+ bool arp_available = arphdr_ok(skb);
+
+ arp = (struct arp_eth_header *)skb_network_header(skb);
+
+ if (arp_available &&
+ arp->ar_hrd == htons(ARPHRD_ETHER) &&
+ arp->ar_pro == htons(ETH_P_IP) &&
+ arp->ar_hln == ETH_ALEN &&
+ arp->ar_pln == 4) {
+
+ /* We only match on the lower 8 bits of the opcode. */
+ if (ntohs(arp->ar_op) <= 0xff)
+ key->ip.proto = ntohs(arp->ar_op);
+ else
+ key->ip.proto = 0;
+
+ memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src));
+ memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst));
+ ether_addr_copy(key->ipv4.arp.sha, arp->ar_sha);
+ ether_addr_copy(key->ipv4.arp.tha, arp->ar_tha);
+ } else {
+ memset(&key->ip, 0, sizeof(key->ip));
+ memset(&key->ipv4, 0, sizeof(key->ipv4));
+ }
+ } else if (eth_p_mpls(key->eth.type)) {
+ size_t stack_len = MPLS_HLEN;
+
+ /* In the presence of an MPLS label stack the end of the L2
+ * header and the beginning of the L3 header differ.
+ *
+ * Advance network_header to the beginning of the L3
+ * header. mac_len corresponds to the end of the L2 header.
+ */
+ while (1) {
+ __be32 lse;
+
+ error = check_header(skb, skb->mac_len + stack_len);
+ if (unlikely(error))
+ return 0;
+
+ memcpy(&lse, skb_network_header(skb), MPLS_HLEN);
+
+ if (stack_len == MPLS_HLEN)
+ memcpy(&key->mpls.top_lse, &lse, MPLS_HLEN);
+
+ skb_set_network_header(skb, skb->mac_len + stack_len);
+ if (lse & htonl(MPLS_LS_S_MASK))
+ break;
+
+ stack_len += MPLS_HLEN;
+ }
+ } else if (key->eth.type == htons(ETH_P_IPV6)) {
+ int nh_len; /* IPv6 Header + Extensions */
+
+ nh_len = parse_ipv6hdr(skb, key);
+ if (unlikely(nh_len < 0)) {
+ switch (nh_len) {
+ case -EINVAL:
+ memset(&key->ip, 0, sizeof(key->ip));
+ memset(&key->ipv6.addr, 0, sizeof(key->ipv6.addr));
+ /* fall-through */
+ case -EPROTO:
+ skb->transport_header = skb->network_header;
+ error = 0;
+ break;
+ default:
+ error = nh_len;
+ }
+ return error;
+ }
+
+ if (key->ip.frag == OVS_FRAG_TYPE_LATER)
+ return 0;
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
+ key->ip.frag = OVS_FRAG_TYPE_FIRST;
+
+ /* Transport layer. */
+ if (key->ip.proto == NEXTHDR_TCP) {
+ if (tcphdr_ok(skb)) {
+ struct tcphdr *tcp = tcp_hdr(skb);
+ key->tp.src = tcp->source;
+ key->tp.dst = tcp->dest;
+ key->tp.flags = TCP_FLAGS_BE16(tcp);
+ } else {
+ memset(&key->tp, 0, sizeof(key->tp));
+ }
+ } else if (key->ip.proto == NEXTHDR_UDP) {
+ if (udphdr_ok(skb)) {
+ struct udphdr *udp = udp_hdr(skb);
+ key->tp.src = udp->source;
+ key->tp.dst = udp->dest;
+ } else {
+ memset(&key->tp, 0, sizeof(key->tp));
+ }
+ } else if (key->ip.proto == NEXTHDR_SCTP) {
+ if (sctphdr_ok(skb)) {
+ struct sctphdr *sctp = sctp_hdr(skb);
+ key->tp.src = sctp->source;
+ key->tp.dst = sctp->dest;
+ } else {
+ memset(&key->tp, 0, sizeof(key->tp));
+ }
+ } else if (key->ip.proto == NEXTHDR_ICMP) {
+ if (icmp6hdr_ok(skb)) {
+ error = parse_icmpv6(skb, key, nh_len);
+ if (error)
+ return error;
+ } else {
+ memset(&key->tp, 0, sizeof(key->tp));
+ }
+ }
+ }
+ return 0;
+}
+
+int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key)
+{
+ return key_extract(skb, key);
+}
+
+int ovs_flow_key_extract(const struct ip_tunnel_info *tun_info,
+ struct sk_buff *skb, struct sw_flow_key *key)
+{
+ /* Extract metadata from packet. */
+ if (tun_info) {
+ key->tun_proto = ip_tunnel_info_af(tun_info);
+ memcpy(&key->tun_key, &tun_info->key, sizeof(key->tun_key));
+
+ if (tun_info->options_len) {
+ BUILD_BUG_ON((1 << (sizeof(tun_info->options_len) *
+ 8)) - 1
+ > sizeof(key->tun_opts));
+
+ ip_tunnel_info_opts_get(TUN_METADATA_OPTS(key, tun_info->options_len),
+ tun_info);
+ key->tun_opts_len = tun_info->options_len;
+ } else {
+ key->tun_opts_len = 0;
+ }
+ } else {
+ key->tun_proto = 0;
+ key->tun_opts_len = 0;
+ memset(&key->tun_key, 0, sizeof(key->tun_key));
+ }
+
+ key->phy.priority = skb->priority;
+ key->phy.in_port = OVS_CB(skb)->input_vport->port_no;
+ key->phy.skb_mark = skb->mark;
+ ovs_ct_fill_key(skb, key);
+ key->ovs_flow_hash = 0;
+ key->recirc_id = 0;
+
+ return key_extract(skb, key);
+}
+
+int ovs_flow_key_extract_userspace(struct net *net, const struct nlattr *attr,
+ struct sk_buff *skb,
+ struct sw_flow_key *key, bool log)
+{
+ int err;
+
+ memset(key, 0, OVS_SW_FLOW_KEY_METADATA_SIZE);
+
+ /* Extract metadata from netlink attributes. */
+ err = ovs_nla_get_flow_metadata(net, attr, key, log);
+ if (err)
+ return err;
+
+ return key_extract(skb, key);
+}
diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h
new file mode 100644
index 0000000..1d055c5
--- /dev/null
+++ b/net/openvswitch/flow.h
@@ -0,0 +1,229 @@
+/*
+ * Copyright (c) 2007-2014 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifndef FLOW_H
+#define FLOW_H 1
+
+#include <linux/cache.h>
+#include <linux/kernel.h>
+#include <linux/netlink.h>
+#include <linux/openvswitch.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/rcupdate.h>
+#include <linux/if_ether.h>
+#include <linux/in6.h>
+#include <linux/jiffies.h>
+#include <linux/time.h>
+#include <linux/flex_array.h>
+#include <net/inet_ecn.h>
+#include <net/ip_tunnels.h>
+#include <net/dst_metadata.h>
+
+struct sk_buff;
+
+/* Store options at the end of the array if they are less than the
+ * maximum size. This allows us to get the benefits of variable length
+ * matching for small options.
+ */
+#define TUN_METADATA_OFFSET(opt_len) \
+ (FIELD_SIZEOF(struct sw_flow_key, tun_opts) - opt_len)
+#define TUN_METADATA_OPTS(flow_key, opt_len) \
+ ((void *)((flow_key)->tun_opts + TUN_METADATA_OFFSET(opt_len)))
+
+struct ovs_tunnel_info {
+ struct metadata_dst *tun_dst;
+};
+
+#define OVS_SW_FLOW_KEY_METADATA_SIZE \
+ (offsetof(struct sw_flow_key, recirc_id) + \
+ FIELD_SIZEOF(struct sw_flow_key, recirc_id))
+
+struct sw_flow_key {
+ u8 tun_opts[255];
+ u8 tun_opts_len;
+ struct ip_tunnel_key tun_key; /* Encapsulating tunnel key. */
+ struct {
+ u32 priority; /* Packet QoS priority. */
+ u32 skb_mark; /* SKB mark. */
+ u16 in_port; /* Input switch port (or DP_MAX_PORTS). */
+ } __packed phy; /* Safe when right after 'tun_key'. */
+ u8 tun_proto; /* Protocol of encapsulating tunnel. */
+ u32 ovs_flow_hash; /* Datapath computed hash value. */
+ u32 recirc_id; /* Recirculation ID. */
+ struct {
+ u8 src[ETH_ALEN]; /* Ethernet source address. */
+ u8 dst[ETH_ALEN]; /* Ethernet destination address. */
+ __be16 tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */
+ __be16 type; /* Ethernet frame type. */
+ } eth;
+ union {
+ struct {
+ __be32 top_lse; /* top label stack entry */
+ } mpls;
+ struct {
+ u8 proto; /* IP protocol or lower 8 bits of ARP opcode. */
+ u8 tos; /* IP ToS. */
+ u8 ttl; /* IP TTL/hop limit. */
+ u8 frag; /* One of OVS_FRAG_TYPE_*. */
+ } ip;
+ };
+ struct {
+ __be16 src; /* TCP/UDP/SCTP source port. */
+ __be16 dst; /* TCP/UDP/SCTP destination port. */
+ __be16 flags; /* TCP flags. */
+ } tp;
+ union {
+ struct {
+ struct {
+ __be32 src; /* IP source address. */
+ __be32 dst; /* IP destination address. */
+ } addr;
+ struct {
+ u8 sha[ETH_ALEN]; /* ARP source hardware address. */
+ u8 tha[ETH_ALEN]; /* ARP target hardware address. */
+ } arp;
+ } ipv4;
+ struct {
+ struct {
+ struct in6_addr src; /* IPv6 source address. */
+ struct in6_addr dst; /* IPv6 destination address. */
+ } addr;
+ __be32 label; /* IPv6 flow label. */
+ struct {
+ struct in6_addr target; /* ND target address. */
+ u8 sll[ETH_ALEN]; /* ND source link layer address. */
+ u8 tll[ETH_ALEN]; /* ND target link layer address. */
+ } nd;
+ } ipv6;
+ };
+ struct {
+ /* Connection tracking fields. */
+ u16 zone;
+ u32 mark;
+ u8 state;
+ struct ovs_key_ct_labels labels;
+ } ct;
+
+} __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */
+
+struct sw_flow_key_range {
+ unsigned short int start;
+ unsigned short int end;
+};
+
+struct sw_flow_mask {
+ int ref_count;
+ struct rcu_head rcu;
+ struct list_head list;
+ struct sw_flow_key_range range;
+ struct sw_flow_key key;
+};
+
+struct sw_flow_match {
+ struct sw_flow_key *key;
+ struct sw_flow_key_range range;
+ struct sw_flow_mask *mask;
+};
+
+#define MAX_UFID_LENGTH 16 /* 128 bits */
+
+struct sw_flow_id {
+ u32 ufid_len;
+ union {
+ u32 ufid[MAX_UFID_LENGTH / 4];
+ struct sw_flow_key *unmasked_key;
+ };
+};
+
+struct sw_flow_actions {
+ struct rcu_head rcu;
+ size_t orig_len; /* From flow_cmd_new netlink actions size */
+ u32 actions_len;
+ struct nlattr actions[];
+};
+
+struct flow_stats {
+ u64 packet_count; /* Number of packets matched. */
+ u64 byte_count; /* Number of bytes matched. */
+ unsigned long used; /* Last used time (in jiffies). */
+ spinlock_t lock; /* Lock for atomic stats update. */
+ __be16 tcp_flags; /* Union of seen TCP flags. */
+};
+
+struct sw_flow {
+ struct rcu_head rcu;
+ struct {
+ struct hlist_node node[2];
+ u32 hash;
+ } flow_table, ufid_table;
+ int stats_last_writer; /* NUMA-node id of the last writer on
+ * 'stats[0]'.
+ */
+ struct sw_flow_key key;
+ struct sw_flow_id id;
+ struct sw_flow_mask *mask;
+ struct sw_flow_actions __rcu *sf_acts;
+ struct flow_stats __rcu *stats[]; /* One for each NUMA node. First one
+ * is allocated at flow creation time,
+ * the rest are allocated on demand
+ * while holding the 'stats[0].lock'.
+ */
+};
+
+struct arp_eth_header {
+ __be16 ar_hrd; /* format of hardware address */
+ __be16 ar_pro; /* format of protocol address */
+ unsigned char ar_hln; /* length of hardware address */
+ unsigned char ar_pln; /* length of protocol address */
+ __be16 ar_op; /* ARP opcode (command) */
+
+ /* Ethernet+IPv4 specific members. */
+ unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
+ unsigned char ar_sip[4]; /* sender IP address */
+ unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
+ unsigned char ar_tip[4]; /* target IP address */
+} __packed;
+
+static inline bool ovs_identifier_is_ufid(const struct sw_flow_id *sfid)
+{
+ return sfid->ufid_len;
+}
+
+static inline bool ovs_identifier_is_key(const struct sw_flow_id *sfid)
+{
+ return !ovs_identifier_is_ufid(sfid);
+}
+
+void ovs_flow_stats_update(struct sw_flow *, __be16 tcp_flags,
+ const struct sk_buff *);
+void ovs_flow_stats_get(const struct sw_flow *, struct ovs_flow_stats *,
+ unsigned long *used, __be16 *tcp_flags);
+void ovs_flow_stats_clear(struct sw_flow *);
+u64 ovs_flow_used_time(unsigned long flow_jiffies);
+
+int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key);
+int ovs_flow_key_extract(const struct ip_tunnel_info *tun_info,
+ struct sk_buff *skb,
+ struct sw_flow_key *key);
+/* Extract key from packet coming from userspace. */
+int ovs_flow_key_extract_userspace(struct net *net, const struct nlattr *attr,
+ struct sk_buff *skb,
+ struct sw_flow_key *key, bool log);
+
+#endif /* flow.h */
diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c
new file mode 100644
index 0000000..d26b28d
--- /dev/null
+++ b/net/openvswitch/flow_netlink.c
@@ -0,0 +1,2517 @@
+/*
+ * Copyright (c) 2007-2014 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include "flow.h"
+#include "datapath.h"
+#include <linux/uaccess.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <net/llc_pdu.h>
+#include <linux/kernel.h>
+#include <linux/jhash.h>
+#include <linux/jiffies.h>
+#include <linux/llc.h>
+#include <linux/module.h>
+#include <linux/in.h>
+#include <linux/rcupdate.h>
+#include <linux/if_arp.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/sctp.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/icmp.h>
+#include <linux/icmpv6.h>
+#include <linux/rculist.h>
+#include <net/geneve.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/ndisc.h>
+#include <net/mpls.h>
+#include <net/vxlan.h>
+
+#include "flow_netlink.h"
+
+struct ovs_len_tbl {
+ int len;
+ const struct ovs_len_tbl *next;
+};
+
+#define OVS_ATTR_NESTED -1
+#define OVS_ATTR_VARIABLE -2
+
+static void update_range(struct sw_flow_match *match,
+ size_t offset, size_t size, bool is_mask)
+{
+ struct sw_flow_key_range *range;
+ size_t start = rounddown(offset, sizeof(long));
+ size_t end = roundup(offset + size, sizeof(long));
+
+ if (!is_mask)
+ range = &match->range;
+ else
+ range = &match->mask->range;
+
+ if (range->start == range->end) {
+ range->start = start;
+ range->end = end;
+ return;
+ }
+
+ if (range->start > start)
+ range->start = start;
+
+ if (range->end < end)
+ range->end = end;
+}
+
+#define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
+ do { \
+ update_range(match, offsetof(struct sw_flow_key, field), \
+ sizeof((match)->key->field), is_mask); \
+ if (is_mask) \
+ (match)->mask->key.field = value; \
+ else \
+ (match)->key->field = value; \
+ } while (0)
+
+#define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
+ do { \
+ update_range(match, offset, len, is_mask); \
+ if (is_mask) \
+ memcpy((u8 *)&(match)->mask->key + offset, value_p, \
+ len); \
+ else \
+ memcpy((u8 *)(match)->key + offset, value_p, len); \
+ } while (0)
+
+#define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
+ SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \
+ value_p, len, is_mask)
+
+#define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \
+ do { \
+ update_range(match, offsetof(struct sw_flow_key, field), \
+ sizeof((match)->key->field), is_mask); \
+ if (is_mask) \
+ memset((u8 *)&(match)->mask->key.field, value, \
+ sizeof((match)->mask->key.field)); \
+ else \
+ memset((u8 *)&(match)->key->field, value, \
+ sizeof((match)->key->field)); \
+ } while (0)
+
+static bool match_validate(const struct sw_flow_match *match,
+ u64 key_attrs, u64 mask_attrs, bool log)
+{
+ u64 key_expected = 1 << OVS_KEY_ATTR_ETHERNET;
+ u64 mask_allowed = key_attrs; /* At most allow all key attributes */
+
+ /* The following mask attributes allowed only if they
+ * pass the validation tests. */
+ mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4)
+ | (1 << OVS_KEY_ATTR_IPV6)
+ | (1 << OVS_KEY_ATTR_TCP)
+ | (1 << OVS_KEY_ATTR_TCP_FLAGS)
+ | (1 << OVS_KEY_ATTR_UDP)
+ | (1 << OVS_KEY_ATTR_SCTP)
+ | (1 << OVS_KEY_ATTR_ICMP)
+ | (1 << OVS_KEY_ATTR_ICMPV6)
+ | (1 << OVS_KEY_ATTR_ARP)
+ | (1 << OVS_KEY_ATTR_ND)
+ | (1 << OVS_KEY_ATTR_MPLS));
+
+ /* Always allowed mask fields. */
+ mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
+ | (1 << OVS_KEY_ATTR_IN_PORT)
+ | (1 << OVS_KEY_ATTR_ETHERTYPE));
+
+ /* Check key attributes. */
+ if (match->key->eth.type == htons(ETH_P_ARP)
+ || match->key->eth.type == htons(ETH_P_RARP)) {
+ key_expected |= 1 << OVS_KEY_ATTR_ARP;
+ if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
+ mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
+ }
+
+ if (eth_p_mpls(match->key->eth.type)) {
+ key_expected |= 1 << OVS_KEY_ATTR_MPLS;
+ if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
+ mask_allowed |= 1 << OVS_KEY_ATTR_MPLS;
+ }
+
+ if (match->key->eth.type == htons(ETH_P_IP)) {
+ key_expected |= 1 << OVS_KEY_ATTR_IPV4;
+ if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
+ mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
+
+ if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
+ if (match->key->ip.proto == IPPROTO_UDP) {
+ key_expected |= 1 << OVS_KEY_ATTR_UDP;
+ if (match->mask && (match->mask->key.ip.proto == 0xff))
+ mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
+ }
+
+ if (match->key->ip.proto == IPPROTO_SCTP) {
+ key_expected |= 1 << OVS_KEY_ATTR_SCTP;
+ if (match->mask && (match->mask->key.ip.proto == 0xff))
+ mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
+ }
+
+ if (match->key->ip.proto == IPPROTO_TCP) {
+ key_expected |= 1 << OVS_KEY_ATTR_TCP;
+ key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
+ if (match->mask && (match->mask->key.ip.proto == 0xff)) {
+ mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
+ mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
+ }
+ }
+
+ if (match->key->ip.proto == IPPROTO_ICMP) {
+ key_expected |= 1 << OVS_KEY_ATTR_ICMP;
+ if (match->mask && (match->mask->key.ip.proto == 0xff))
+ mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
+ }
+ }
+ }
+
+ if (match->key->eth.type == htons(ETH_P_IPV6)) {
+ key_expected |= 1 << OVS_KEY_ATTR_IPV6;
+ if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
+ mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
+
+ if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
+ if (match->key->ip.proto == IPPROTO_UDP) {
+ key_expected |= 1 << OVS_KEY_ATTR_UDP;
+ if (match->mask && (match->mask->key.ip.proto == 0xff))
+ mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
+ }
+
+ if (match->key->ip.proto == IPPROTO_SCTP) {
+ key_expected |= 1 << OVS_KEY_ATTR_SCTP;
+ if (match->mask && (match->mask->key.ip.proto == 0xff))
+ mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
+ }
+
+ if (match->key->ip.proto == IPPROTO_TCP) {
+ key_expected |= 1 << OVS_KEY_ATTR_TCP;
+ key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
+ if (match->mask && (match->mask->key.ip.proto == 0xff)) {
+ mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
+ mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
+ }
+ }
+
+ if (match->key->ip.proto == IPPROTO_ICMPV6) {
+ key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
+ if (match->mask && (match->mask->key.ip.proto == 0xff))
+ mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
+
+ if (match->key->tp.src ==
+ htons(NDISC_NEIGHBOUR_SOLICITATION) ||
+ match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
+ key_expected |= 1 << OVS_KEY_ATTR_ND;
+ if (match->mask && (match->mask->key.tp.src == htons(0xff)))
+ mask_allowed |= 1 << OVS_KEY_ATTR_ND;
+ }
+ }
+ }
+ }
+
+ if ((key_attrs & key_expected) != key_expected) {
+ /* Key attributes check failed. */
+ OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)",
+ (unsigned long long)key_attrs,
+ (unsigned long long)key_expected);
+ return false;
+ }
+
+ if ((mask_attrs & mask_allowed) != mask_attrs) {
+ /* Mask attributes check failed. */
+ OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)",
+ (unsigned long long)mask_attrs,
+ (unsigned long long)mask_allowed);
+ return false;
+ }
+
+ return true;
+}
+
+size_t ovs_tun_key_attr_size(void)
+{
+ /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider
+ * updating this function.
+ */
+ return nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */
+ + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_SRC */
+ + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_DST */
+ + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
+ + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
+ + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
+ + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
+ + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */
+ + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */
+ /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS is mutually exclusive with
+ * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
+ */
+ + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
+ + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */
+}
+
+size_t ovs_key_attr_size(void)
+{
+ /* Whenever adding new OVS_KEY_ FIELDS, we should consider
+ * updating this function.
+ */
+ BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 26);
+
+ return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
+ + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
+ + ovs_tun_key_attr_size()
+ + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
+ + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
+ + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */
+ + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */
+ + nla_total_size(4) /* OVS_KEY_ATTR_CT_STATE */
+ + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */
+ + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */
+ + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABELS */
+ + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
+ + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
+ + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */
+ + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
+ + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
+ + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
+ + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
+ + nla_total_size(28); /* OVS_KEY_ATTR_ND */
+}
+
+static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = {
+ [OVS_VXLAN_EXT_GBP] = { .len = sizeof(u32) },
+};
+
+static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
+ [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) },
+ [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) },
+ [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) },
+ [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 },
+ [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 },
+ [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
+ [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 },
+ [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) },
+ [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) },
+ [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 },
+ [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_VARIABLE },
+ [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED,
+ .next = ovs_vxlan_ext_key_lens },
+ [OVS_TUNNEL_KEY_ATTR_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
+ [OVS_TUNNEL_KEY_ATTR_IPV6_DST] = { .len = sizeof(struct in6_addr) },
+};
+
+/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
+static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
+ [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED },
+ [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) },
+ [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) },
+ [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) },
+ [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) },
+ [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) },
+ [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) },
+ [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) },
+ [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) },
+ [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) },
+ [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) },
+ [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) },
+ [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) },
+ [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) },
+ [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) },
+ [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) },
+ [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) },
+ [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) },
+ [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) },
+ [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED,
+ .next = ovs_tunnel_key_lens, },
+ [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) },
+ [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u32) },
+ [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) },
+ [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) },
+ [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) },
+};
+
+static bool check_attr_len(unsigned int attr_len, unsigned int expected_len)
+{
+ return expected_len == attr_len ||
+ expected_len == OVS_ATTR_NESTED ||
+ expected_len == OVS_ATTR_VARIABLE;
+}
+
+static bool is_all_zero(const u8 *fp, size_t size)
+{
+ int i;
+
+ if (!fp)
+ return false;
+
+ for (i = 0; i < size; i++)
+ if (fp[i])
+ return false;
+
+ return true;
+}
+
+static int __parse_flow_nlattrs(const struct nlattr *attr,
+ const struct nlattr *a[],
+ u64 *attrsp, bool log, bool nz)
+{
+ const struct nlattr *nla;
+ u64 attrs;
+ int rem;
+
+ attrs = *attrsp;
+ nla_for_each_nested(nla, attr, rem) {
+ u16 type = nla_type(nla);
+ int expected_len;
+
+ if (type > OVS_KEY_ATTR_MAX) {
+ OVS_NLERR(log, "Key type %d is out of range max %d",
+ type, OVS_KEY_ATTR_MAX);
+ return -EINVAL;
+ }
+
+ if (attrs & (1 << type)) {
+ OVS_NLERR(log, "Duplicate key (type %d).", type);
+ return -EINVAL;
+ }
+
+ expected_len = ovs_key_lens[type].len;
+ if (!check_attr_len(nla_len(nla), expected_len)) {
+ OVS_NLERR(log, "Key %d has unexpected len %d expected %d",
+ type, nla_len(nla), expected_len);
+ return -EINVAL;
+ }
+
+ if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
+ attrs |= 1 << type;
+ a[type] = nla;
+ }
+ }
+ if (rem) {
+ OVS_NLERR(log, "Message has %d unknown bytes.", rem);
+ return -EINVAL;
+ }
+
+ *attrsp = attrs;
+ return 0;
+}
+
+static int parse_flow_mask_nlattrs(const struct nlattr *attr,
+ const struct nlattr *a[], u64 *attrsp,
+ bool log)
+{
+ return __parse_flow_nlattrs(attr, a, attrsp, log, true);
+}
+
+static int parse_flow_nlattrs(const struct nlattr *attr,
+ const struct nlattr *a[], u64 *attrsp,
+ bool log)
+{
+ return __parse_flow_nlattrs(attr, a, attrsp, log, false);
+}
+
+static int genev_tun_opt_from_nlattr(const struct nlattr *a,
+ struct sw_flow_match *match, bool is_mask,
+ bool log)
+{
+ unsigned long opt_key_offset;
+
+ if (nla_len(a) > sizeof(match->key->tun_opts)) {
+ OVS_NLERR(log, "Geneve option length err (len %d, max %zu).",
+ nla_len(a), sizeof(match->key->tun_opts));
+ return -EINVAL;
+ }
+
+ if (nla_len(a) % 4 != 0) {
+ OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.",
+ nla_len(a));
+ return -EINVAL;
+ }
+
+ /* We need to record the length of the options passed
+ * down, otherwise packets with the same format but
+ * additional options will be silently matched.
+ */
+ if (!is_mask) {
+ SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
+ false);
+ } else {
+ /* This is somewhat unusual because it looks at
+ * both the key and mask while parsing the
+ * attributes (and by extension assumes the key
+ * is parsed first). Normally, we would verify
+ * that each is the correct length and that the
+ * attributes line up in the validate function.
+ * However, that is difficult because this is
+ * variable length and we won't have the
+ * information later.
+ */
+ if (match->key->tun_opts_len != nla_len(a)) {
+ OVS_NLERR(log, "Geneve option len %d != mask len %d",
+ match->key->tun_opts_len, nla_len(a));
+ return -EINVAL;
+ }
+
+ SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
+ }
+
+ opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
+ SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
+ nla_len(a), is_mask);
+ return 0;
+}
+
+static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr,
+ struct sw_flow_match *match, bool is_mask,
+ bool log)
+{
+ struct nlattr *a;
+ int rem;
+ unsigned long opt_key_offset;
+ struct vxlan_metadata opts;
+
+ BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
+
+ memset(&opts, 0, sizeof(opts));
+ nla_for_each_nested(a, attr, rem) {
+ int type = nla_type(a);
+
+ if (type > OVS_VXLAN_EXT_MAX) {
+ OVS_NLERR(log, "VXLAN extension %d out of range max %d",
+ type, OVS_VXLAN_EXT_MAX);
+ return -EINVAL;
+ }
+
+ if (!check_attr_len(nla_len(a),
+ ovs_vxlan_ext_key_lens[type].len)) {
+ OVS_NLERR(log, "VXLAN extension %d has unexpected len %d expected %d",
+ type, nla_len(a),
+ ovs_vxlan_ext_key_lens[type].len);
+ return -EINVAL;
+ }
+
+ switch (type) {
+ case OVS_VXLAN_EXT_GBP:
+ opts.gbp = nla_get_u32(a);
+ break;
+ default:
+ OVS_NLERR(log, "Unknown VXLAN extension attribute %d",
+ type);
+ return -EINVAL;
+ }
+ }
+ if (rem) {
+ OVS_NLERR(log, "VXLAN extension message has %d unknown bytes.",
+ rem);
+ return -EINVAL;
+ }
+
+ if (!is_mask)
+ SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false);
+ else
+ SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
+
+ opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts));
+ SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts),
+ is_mask);
+ return 0;
+}
+
+static int ip_tun_from_nlattr(const struct nlattr *attr,
+ struct sw_flow_match *match, bool is_mask,
+ bool log)
+{
+ bool ttl = false, ipv4 = false, ipv6 = false;
+ __be16 tun_flags = 0;
+ int opts_type = 0;
+ struct nlattr *a;
+ int rem;
+
+ nla_for_each_nested(a, attr, rem) {
+ int type = nla_type(a);
+ int err;
+
+ if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
+ OVS_NLERR(log, "Tunnel attr %d out of range max %d",
+ type, OVS_TUNNEL_KEY_ATTR_MAX);
+ return -EINVAL;
+ }
+
+ if (!check_attr_len(nla_len(a),
+ ovs_tunnel_key_lens[type].len)) {
+ OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d",
+ type, nla_len(a), ovs_tunnel_key_lens[type].len);
+ return -EINVAL;
+ }
+
+ switch (type) {
+ case OVS_TUNNEL_KEY_ATTR_ID:
+ SW_FLOW_KEY_PUT(match, tun_key.tun_id,
+ nla_get_be64(a), is_mask);
+ tun_flags |= TUNNEL_KEY;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
+ SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src,
+ nla_get_in_addr(a), is_mask);
+ ipv4 = true;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
+ SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst,
+ nla_get_in_addr(a), is_mask);
+ ipv4 = true;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_IPV6_SRC:
+ SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.src,
+ nla_get_in6_addr(a), is_mask);
+ ipv6 = true;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_IPV6_DST:
+ SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst,
+ nla_get_in6_addr(a), is_mask);
+ ipv6 = true;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_TOS:
+ SW_FLOW_KEY_PUT(match, tun_key.tos,
+ nla_get_u8(a), is_mask);
+ break;
+ case OVS_TUNNEL_KEY_ATTR_TTL:
+ SW_FLOW_KEY_PUT(match, tun_key.ttl,
+ nla_get_u8(a), is_mask);
+ ttl = true;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
+ tun_flags |= TUNNEL_DONT_FRAGMENT;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_CSUM:
+ tun_flags |= TUNNEL_CSUM;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_TP_SRC:
+ SW_FLOW_KEY_PUT(match, tun_key.tp_src,
+ nla_get_be16(a), is_mask);
+ break;
+ case OVS_TUNNEL_KEY_ATTR_TP_DST:
+ SW_FLOW_KEY_PUT(match, tun_key.tp_dst,
+ nla_get_be16(a), is_mask);
+ break;
+ case OVS_TUNNEL_KEY_ATTR_OAM:
+ tun_flags |= TUNNEL_OAM;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
+ if (opts_type) {
+ OVS_NLERR(log, "Multiple metadata blocks provided");
+ return -EINVAL;
+ }
+
+ err = genev_tun_opt_from_nlattr(a, match, is_mask, log);
+ if (err)
+ return err;
+
+ tun_flags |= TUNNEL_GENEVE_OPT;
+ opts_type = type;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
+ if (opts_type) {
+ OVS_NLERR(log, "Multiple metadata blocks provided");
+ return -EINVAL;
+ }
+
+ err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log);
+ if (err)
+ return err;
+
+ tun_flags |= TUNNEL_VXLAN_OPT;
+ opts_type = type;
+ break;
+ default:
+ OVS_NLERR(log, "Unknown IP tunnel attribute %d",
+ type);
+ return -EINVAL;
+ }
+ }
+
+ SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
+ if (is_mask)
+ SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true);
+ else
+ SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET,
+ false);
+
+ if (rem > 0) {
+ OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.",
+ rem);
+ return -EINVAL;
+ }
+
+ if (ipv4 && ipv6) {
+ OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes");
+ return -EINVAL;
+ }
+
+ if (!is_mask) {
+ if (!ipv4 && !ipv6) {
+ OVS_NLERR(log, "IP tunnel dst address not specified");
+ return -EINVAL;
+ }
+ if (ipv4 && !match->key->tun_key.u.ipv4.dst) {
+ OVS_NLERR(log, "IPv4 tunnel dst address is zero");
+ return -EINVAL;
+ }
+ if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) {
+ OVS_NLERR(log, "IPv6 tunnel dst address is zero");
+ return -EINVAL;
+ }
+
+ if (!ttl) {
+ OVS_NLERR(log, "IP tunnel TTL not specified.");
+ return -EINVAL;
+ }
+ }
+
+ return opts_type;
+}
+
+static int vxlan_opt_to_nlattr(struct sk_buff *skb,
+ const void *tun_opts, int swkey_tun_opts_len)
+{
+ const struct vxlan_metadata *opts = tun_opts;
+ struct nlattr *nla;
+
+ nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
+ if (!nla)
+ return -EMSGSIZE;
+
+ if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0)
+ return -EMSGSIZE;
+
+ nla_nest_end(skb, nla);
+ return 0;
+}
+
+static int __ip_tun_to_nlattr(struct sk_buff *skb,
+ const struct ip_tunnel_key *output,
+ const void *tun_opts, int swkey_tun_opts_len,
+ unsigned short tun_proto)
+{
+ if (output->tun_flags & TUNNEL_KEY &&
+ nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id))
+ return -EMSGSIZE;
+ switch (tun_proto) {
+ case AF_INET:
+ if (output->u.ipv4.src &&
+ nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
+ output->u.ipv4.src))
+ return -EMSGSIZE;
+ if (output->u.ipv4.dst &&
+ nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
+ output->u.ipv4.dst))
+ return -EMSGSIZE;
+ break;
+ case AF_INET6:
+ if (!ipv6_addr_any(&output->u.ipv6.src) &&
+ nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_SRC,
+ &output->u.ipv6.src))
+ return -EMSGSIZE;
+ if (!ipv6_addr_any(&output->u.ipv6.dst) &&
+ nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_DST,
+ &output->u.ipv6.dst))
+ return -EMSGSIZE;
+ break;
+ }
+ if (output->tos &&
+ nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos))
+ return -EMSGSIZE;
+ if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl))
+ return -EMSGSIZE;
+ if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
+ nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
+ return -EMSGSIZE;
+ if ((output->tun_flags & TUNNEL_CSUM) &&
+ nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
+ return -EMSGSIZE;
+ if (output->tp_src &&
+ nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src))
+ return -EMSGSIZE;
+ if (output->tp_dst &&
+ nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst))
+ return -EMSGSIZE;
+ if ((output->tun_flags & TUNNEL_OAM) &&
+ nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
+ return -EMSGSIZE;
+ if (swkey_tun_opts_len) {
+ if (output->tun_flags & TUNNEL_GENEVE_OPT &&
+ nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
+ swkey_tun_opts_len, tun_opts))
+ return -EMSGSIZE;
+ else if (output->tun_flags & TUNNEL_VXLAN_OPT &&
+ vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len))
+ return -EMSGSIZE;
+ }
+
+ return 0;
+}
+
+static int ip_tun_to_nlattr(struct sk_buff *skb,
+ const struct ip_tunnel_key *output,
+ const void *tun_opts, int swkey_tun_opts_len,
+ unsigned short tun_proto)
+{
+ struct nlattr *nla;
+ int err;
+
+ nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
+ if (!nla)
+ return -EMSGSIZE;
+
+ err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len,
+ tun_proto);
+ if (err)
+ return err;
+
+ nla_nest_end(skb, nla);
+ return 0;
+}
+
+int ovs_nla_put_tunnel_info(struct sk_buff *skb,
+ struct ip_tunnel_info *tun_info)
+{
+ return __ip_tun_to_nlattr(skb, &tun_info->key,
+ ip_tunnel_info_opts(tun_info),
+ tun_info->options_len,
+ ip_tunnel_info_af(tun_info));
+}
+
+static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match,
+ u64 *attrs, const struct nlattr **a,
+ bool is_mask, bool log)
+{
+ if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
+ u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
+
+ SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
+ *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
+ }
+
+ if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
+ u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
+
+ SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
+ *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
+ }
+
+ if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
+ SW_FLOW_KEY_PUT(match, phy.priority,
+ nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
+ *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
+ }
+
+ if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
+ u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
+
+ if (is_mask) {
+ in_port = 0xffffffff; /* Always exact match in_port. */
+ } else if (in_port >= DP_MAX_PORTS) {
+ OVS_NLERR(log, "Port %d exceeds max allowable %d",
+ in_port, DP_MAX_PORTS);
+ return -EINVAL;
+ }
+
+ SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
+ *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
+ } else if (!is_mask) {
+ SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
+ }
+
+ if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
+ uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
+
+ SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
+ *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
+ }
+ if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
+ if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
+ is_mask, log) < 0)
+ return -EINVAL;
+ *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
+ }
+
+ if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
+ ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) {
+ u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]);
+
+ if (ct_state & ~CT_SUPPORTED_MASK) {
+ OVS_NLERR(log, "ct_state flags %08x unsupported",
+ ct_state);
+ return -EINVAL;
+ }
+
+ SW_FLOW_KEY_PUT(match, ct.state, ct_state, is_mask);
+ *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
+ }
+ if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
+ ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) {
+ u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
+
+ SW_FLOW_KEY_PUT(match, ct.zone, ct_zone, is_mask);
+ *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
+ }
+ if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
+ ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) {
+ u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]);
+
+ SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask);
+ *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK);
+ }
+ if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) &&
+ ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) {
+ const struct ovs_key_ct_labels *cl;
+
+ cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]);
+ SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels,
+ sizeof(*cl), is_mask);
+ *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS);
+ }
+ return 0;
+}
+
+static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
+ u64 attrs, const struct nlattr **a,
+ bool is_mask, bool log)
+{
+ int err;
+
+ err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log);
+ if (err)
+ return err;
+
+ if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
+ const struct ovs_key_ethernet *eth_key;
+
+ eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
+ SW_FLOW_KEY_MEMCPY(match, eth.src,
+ eth_key->eth_src, ETH_ALEN, is_mask);
+ SW_FLOW_KEY_MEMCPY(match, eth.dst,
+ eth_key->eth_dst, ETH_ALEN, is_mask);
+ attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
+ }
+
+ if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
+ __be16 tci;
+
+ tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
+ if (!(tci & htons(VLAN_TAG_PRESENT))) {
+ if (is_mask)
+ OVS_NLERR(log, "VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.");
+ else
+ OVS_NLERR(log, "VLAN TCI does not have VLAN_TAG_PRESENT bit set.");
+
+ return -EINVAL;
+ }
+
+ SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask);
+ attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
+ }
+
+ if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
+ __be16 eth_type;
+
+ eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
+ if (is_mask) {
+ /* Always exact match EtherType. */
+ eth_type = htons(0xffff);
+ } else if (!eth_proto_is_802_3(eth_type)) {
+ OVS_NLERR(log, "EtherType %x is less than min %x",
+ ntohs(eth_type), ETH_P_802_3_MIN);
+ return -EINVAL;
+ }
+
+ SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
+ attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
+ } else if (!is_mask) {
+ SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
+ }
+
+ if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
+ const struct ovs_key_ipv4 *ipv4_key;
+
+ ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
+ if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
+ OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
+ ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
+ return -EINVAL;
+ }
+ SW_FLOW_KEY_PUT(match, ip.proto,
+ ipv4_key->ipv4_proto, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.tos,
+ ipv4_key->ipv4_tos, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.ttl,
+ ipv4_key->ipv4_ttl, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.frag,
+ ipv4_key->ipv4_frag, is_mask);
+ SW_FLOW_KEY_PUT(match, ipv4.addr.src,
+ ipv4_key->ipv4_src, is_mask);
+ SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
+ ipv4_key->ipv4_dst, is_mask);
+ attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
+ }
+
+ if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
+ const struct ovs_key_ipv6 *ipv6_key;
+
+ ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
+ if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
+ OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
+ ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
+ return -EINVAL;
+ }
+
+ if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
+ OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x).\n",
+ ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
+ return -EINVAL;
+ }
+
+ SW_FLOW_KEY_PUT(match, ipv6.label,
+ ipv6_key->ipv6_label, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.proto,
+ ipv6_key->ipv6_proto, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.tos,
+ ipv6_key->ipv6_tclass, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.ttl,
+ ipv6_key->ipv6_hlimit, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.frag,
+ ipv6_key->ipv6_frag, is_mask);
+ SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
+ ipv6_key->ipv6_src,
+ sizeof(match->key->ipv6.addr.src),
+ is_mask);
+ SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
+ ipv6_key->ipv6_dst,
+ sizeof(match->key->ipv6.addr.dst),
+ is_mask);
+
+ attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
+ }
+
+ if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
+ const struct ovs_key_arp *arp_key;
+
+ arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
+ if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
+ OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
+ arp_key->arp_op);
+ return -EINVAL;
+ }
+
+ SW_FLOW_KEY_PUT(match, ipv4.addr.src,
+ arp_key->arp_sip, is_mask);
+ SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
+ arp_key->arp_tip, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.proto,
+ ntohs(arp_key->arp_op), is_mask);
+ SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
+ arp_key->arp_sha, ETH_ALEN, is_mask);
+ SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
+ arp_key->arp_tha, ETH_ALEN, is_mask);
+
+ attrs &= ~(1 << OVS_KEY_ATTR_ARP);
+ }
+
+ if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
+ const struct ovs_key_mpls *mpls_key;
+
+ mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
+ SW_FLOW_KEY_PUT(match, mpls.top_lse,
+ mpls_key->mpls_lse, is_mask);
+
+ attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
+ }
+
+ if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
+ const struct ovs_key_tcp *tcp_key;
+
+ tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
+ SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
+ SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
+ attrs &= ~(1 << OVS_KEY_ATTR_TCP);
+ }
+
+ if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
+ SW_FLOW_KEY_PUT(match, tp.flags,
+ nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
+ is_mask);
+ attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
+ }
+
+ if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
+ const struct ovs_key_udp *udp_key;
+
+ udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
+ SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
+ SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
+ attrs &= ~(1 << OVS_KEY_ATTR_UDP);
+ }
+
+ if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
+ const struct ovs_key_sctp *sctp_key;
+
+ sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
+ SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
+ SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
+ attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
+ }
+
+ if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
+ const struct ovs_key_icmp *icmp_key;
+
+ icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
+ SW_FLOW_KEY_PUT(match, tp.src,
+ htons(icmp_key->icmp_type), is_mask);
+ SW_FLOW_KEY_PUT(match, tp.dst,
+ htons(icmp_key->icmp_code), is_mask);
+ attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
+ }
+
+ if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
+ const struct ovs_key_icmpv6 *icmpv6_key;
+
+ icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
+ SW_FLOW_KEY_PUT(match, tp.src,
+ htons(icmpv6_key->icmpv6_type), is_mask);
+ SW_FLOW_KEY_PUT(match, tp.dst,
+ htons(icmpv6_key->icmpv6_code), is_mask);
+ attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
+ }
+
+ if (attrs & (1 << OVS_KEY_ATTR_ND)) {
+ const struct ovs_key_nd *nd_key;
+
+ nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
+ SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
+ nd_key->nd_target,
+ sizeof(match->key->ipv6.nd.target),
+ is_mask);
+ SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
+ nd_key->nd_sll, ETH_ALEN, is_mask);
+ SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
+ nd_key->nd_tll, ETH_ALEN, is_mask);
+ attrs &= ~(1 << OVS_KEY_ATTR_ND);
+ }
+
+ if (attrs != 0) {
+ OVS_NLERR(log, "Unknown key attributes %llx",
+ (unsigned long long)attrs);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void nlattr_set(struct nlattr *attr, u8 val,
+ const struct ovs_len_tbl *tbl)
+{
+ struct nlattr *nla;
+ int rem;
+
+ /* The nlattr stream should already have been validated */
+ nla_for_each_nested(nla, attr, rem) {
+ if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED) {
+ if (tbl[nla_type(nla)].next)
+ tbl = tbl[nla_type(nla)].next;
+ nlattr_set(nla, val, tbl);
+ } else {
+ memset(nla_data(nla), val, nla_len(nla));
+ }
+
+ if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE)
+ *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK;
+ }
+}
+
+static void mask_set_nlattr(struct nlattr *attr, u8 val)
+{
+ nlattr_set(attr, val, ovs_key_lens);
+}
+
+/**
+ * ovs_nla_get_match - parses Netlink attributes into a flow key and
+ * mask. In case the 'mask' is NULL, the flow is treated as exact match
+ * flow. Otherwise, it is treated as a wildcarded flow, except the mask
+ * does not include any don't care bit.
+ * @net: Used to determine per-namespace field support.
+ * @match: receives the extracted flow match information.
+ * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
+ * sequence. The fields should of the packet that triggered the creation
+ * of this flow.
+ * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
+ * attribute specifies the mask field of the wildcarded flow.
+ * @log: Boolean to allow kernel error logging. Normally true, but when
+ * probing for feature compatibility this should be passed in as false to
+ * suppress unnecessary error logging.
+ */
+int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
+ const struct nlattr *nla_key,
+ const struct nlattr *nla_mask,
+ bool log)
+{
+ const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
+ const struct nlattr *encap;
+ struct nlattr *newmask = NULL;
+ u64 key_attrs = 0;
+ u64 mask_attrs = 0;
+ bool encap_valid = false;
+ int err;
+
+ err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
+ if (err)
+ return err;
+
+ if ((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
+ (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
+ (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) {
+ __be16 tci;
+
+ if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
+ (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
+ OVS_NLERR(log, "Invalid Vlan frame.");
+ return -EINVAL;
+ }
+
+ key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
+ tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
+ encap = a[OVS_KEY_ATTR_ENCAP];
+ key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
+ encap_valid = true;
+
+ if (tci & htons(VLAN_TAG_PRESENT)) {
+ err = parse_flow_nlattrs(encap, a, &key_attrs, log);
+ if (err)
+ return err;
+ } else if (!tci) {
+ /* Corner case for truncated 802.1Q header. */
+ if (nla_len(encap)) {
+ OVS_NLERR(log, "Truncated 802.1Q header has non-zero encap attribute.");
+ return -EINVAL;
+ }
+ } else {
+ OVS_NLERR(log, "Encap attr is set for non-VLAN frame");
+ return -EINVAL;
+ }
+ }
+
+ err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
+ if (err)
+ return err;
+
+ if (match->mask) {
+ if (!nla_mask) {
+ /* Create an exact match mask. We need to set to 0xff
+ * all the 'match->mask' fields that have been touched
+ * in 'match->key'. We cannot simply memset
+ * 'match->mask', because padding bytes and fields not
+ * specified in 'match->key' should be left to 0.
+ * Instead, we use a stream of netlink attributes,
+ * copied from 'key' and set to 0xff.
+ * ovs_key_from_nlattrs() will take care of filling
+ * 'match->mask' appropriately.
+ */
+ newmask = kmemdup(nla_key,
+ nla_total_size(nla_len(nla_key)),
+ GFP_KERNEL);
+ if (!newmask)
+ return -ENOMEM;
+
+ mask_set_nlattr(newmask, 0xff);
+
+ /* The userspace does not send tunnel attributes that
+ * are 0, but we should not wildcard them nonetheless.
+ */
+ if (match->key->tun_proto)
+ SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
+ 0xff, true);
+
+ nla_mask = newmask;
+ }
+
+ err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
+ if (err)
+ goto free_newmask;
+
+ /* Always match on tci. */
+ SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true);
+
+ if (mask_attrs & 1 << OVS_KEY_ATTR_ENCAP) {
+ __be16 eth_type = 0;
+ __be16 tci = 0;
+
+ if (!encap_valid) {
+ OVS_NLERR(log, "Encap mask attribute is set for non-VLAN frame.");
+ err = -EINVAL;
+ goto free_newmask;
+ }
+
+ mask_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
+ if (a[OVS_KEY_ATTR_ETHERTYPE])
+ eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
+
+ if (eth_type == htons(0xffff)) {
+ mask_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
+ encap = a[OVS_KEY_ATTR_ENCAP];
+ err = parse_flow_mask_nlattrs(encap, a,
+ &mask_attrs, log);
+ if (err)
+ goto free_newmask;
+ } else {
+ OVS_NLERR(log, "VLAN frames must have an exact match on the TPID (mask=%x).",
+ ntohs(eth_type));
+ err = -EINVAL;
+ goto free_newmask;
+ }
+
+ if (a[OVS_KEY_ATTR_VLAN])
+ tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
+
+ if (!(tci & htons(VLAN_TAG_PRESENT))) {
+ OVS_NLERR(log, "VLAN tag present bit must have an exact match (tci_mask=%x).",
+ ntohs(tci));
+ err = -EINVAL;
+ goto free_newmask;
+ }
+ }
+
+ err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
+ log);
+ if (err)
+ goto free_newmask;
+ }
+
+ if (!match_validate(match, key_attrs, mask_attrs, log))
+ err = -EINVAL;
+
+free_newmask:
+ kfree(newmask);
+ return err;
+}
+
+static size_t get_ufid_len(const struct nlattr *attr, bool log)
+{
+ size_t len;
+
+ if (!attr)
+ return 0;
+
+ len = nla_len(attr);
+ if (len < 1 || len > MAX_UFID_LENGTH) {
+ OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
+ nla_len(attr), MAX_UFID_LENGTH);
+ return 0;
+ }
+
+ return len;
+}
+
+/* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
+ * or false otherwise.
+ */
+bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
+ bool log)
+{
+ sfid->ufid_len = get_ufid_len(attr, log);
+ if (sfid->ufid_len)
+ memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
+
+ return sfid->ufid_len;
+}
+
+int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
+ const struct sw_flow_key *key, bool log)
+{
+ struct sw_flow_key *new_key;
+
+ if (ovs_nla_get_ufid(sfid, ufid, log))
+ return 0;
+
+ /* If UFID was not provided, use unmasked key. */
+ new_key = kmalloc(sizeof(*new_key), GFP_KERNEL);
+ if (!new_key)
+ return -ENOMEM;
+ memcpy(new_key, key, sizeof(*key));
+ sfid->unmasked_key = new_key;
+
+ return 0;
+}
+
+u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
+{
+ return attr ? nla_get_u32(attr) : 0;
+}
+
+/**
+ * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
+ * @key: Receives extracted in_port, priority, tun_key and skb_mark.
+ * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
+ * sequence.
+ * @log: Boolean to allow kernel error logging. Normally true, but when
+ * probing for feature compatibility this should be passed in as false to
+ * suppress unnecessary error logging.
+ *
+ * This parses a series of Netlink attributes that form a flow key, which must
+ * take the same form accepted by flow_from_nlattrs(), but only enough of it to
+ * get the metadata, that is, the parts of the flow key that cannot be
+ * extracted from the packet itself.
+ */
+
+int ovs_nla_get_flow_metadata(struct net *net, const struct nlattr *attr,
+ struct sw_flow_key *key,
+ bool log)
+{
+ const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
+ struct sw_flow_match match;
+ u64 attrs = 0;
+ int err;
+
+ err = parse_flow_nlattrs(attr, a, &attrs, log);
+ if (err)
+ return -EINVAL;
+
+ memset(&match, 0, sizeof(match));
+ match.key = key;
+
+ memset(&key->ct, 0, sizeof(key->ct));
+ key->phy.in_port = DP_MAX_PORTS;
+
+ return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
+}
+
+static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
+ const struct sw_flow_key *output, bool is_mask,
+ struct sk_buff *skb)
+{
+ struct ovs_key_ethernet *eth_key;
+ struct nlattr *nla, *encap;
+
+ if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
+ goto nla_put_failure;
+
+ if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
+ goto nla_put_failure;
+
+ if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
+ goto nla_put_failure;
+
+ if ((swkey->tun_proto || is_mask)) {
+ const void *opts = NULL;
+
+ if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
+ opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
+
+ if (ip_tun_to_nlattr(skb, &output->tun_key, opts,
+ swkey->tun_opts_len, swkey->tun_proto))
+ goto nla_put_failure;
+ }
+
+ if (swkey->phy.in_port == DP_MAX_PORTS) {
+ if (is_mask && (output->phy.in_port == 0xffff))
+ if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
+ goto nla_put_failure;
+ } else {
+ u16 upper_u16;
+ upper_u16 = !is_mask ? 0 : 0xffff;
+
+ if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
+ (upper_u16 << 16) | output->phy.in_port))
+ goto nla_put_failure;
+ }
+
+ if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
+ goto nla_put_failure;
+
+ if (ovs_ct_put_key(output, skb))
+ goto nla_put_failure;
+
+ nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
+ if (!nla)
+ goto nla_put_failure;
+
+ eth_key = nla_data(nla);
+ ether_addr_copy(eth_key->eth_src, output->eth.src);
+ ether_addr_copy(eth_key->eth_dst, output->eth.dst);
+
+ if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) {
+ __be16 eth_type;
+ eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff);
+ if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
+ nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci))
+ goto nla_put_failure;
+ encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
+ if (!swkey->eth.tci)
+ goto unencap;
+ } else
+ encap = NULL;
+
+ if (swkey->eth.type == htons(ETH_P_802_2)) {
+ /*
+ * Ethertype 802.2 is represented in the netlink with omitted
+ * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
+ * 0xffff in the mask attribute. Ethertype can also
+ * be wildcarded.
+ */
+ if (is_mask && output->eth.type)
+ if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
+ output->eth.type))
+ goto nla_put_failure;
+ goto unencap;
+ }
+
+ if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
+ goto nla_put_failure;
+
+ if (swkey->eth.type == htons(ETH_P_IP)) {
+ struct ovs_key_ipv4 *ipv4_key;
+
+ nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
+ if (!nla)
+ goto nla_put_failure;
+ ipv4_key = nla_data(nla);
+ ipv4_key->ipv4_src = output->ipv4.addr.src;
+ ipv4_key->ipv4_dst = output->ipv4.addr.dst;
+ ipv4_key->ipv4_proto = output->ip.proto;
+ ipv4_key->ipv4_tos = output->ip.tos;
+ ipv4_key->ipv4_ttl = output->ip.ttl;
+ ipv4_key->ipv4_frag = output->ip.frag;
+ } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
+ struct ovs_key_ipv6 *ipv6_key;
+
+ nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
+ if (!nla)
+ goto nla_put_failure;
+ ipv6_key = nla_data(nla);
+ memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
+ sizeof(ipv6_key->ipv6_src));
+ memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
+ sizeof(ipv6_key->ipv6_dst));
+ ipv6_key->ipv6_label = output->ipv6.label;
+ ipv6_key->ipv6_proto = output->ip.proto;
+ ipv6_key->ipv6_tclass = output->ip.tos;
+ ipv6_key->ipv6_hlimit = output->ip.ttl;
+ ipv6_key->ipv6_frag = output->ip.frag;
+ } else if (swkey->eth.type == htons(ETH_P_ARP) ||
+ swkey->eth.type == htons(ETH_P_RARP)) {
+ struct ovs_key_arp *arp_key;
+
+ nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
+ if (!nla)
+ goto nla_put_failure;
+ arp_key = nla_data(nla);
+ memset(arp_key, 0, sizeof(struct ovs_key_arp));
+ arp_key->arp_sip = output->ipv4.addr.src;
+ arp_key->arp_tip = output->ipv4.addr.dst;
+ arp_key->arp_op = htons(output->ip.proto);
+ ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
+ ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
+ } else if (eth_p_mpls(swkey->eth.type)) {
+ struct ovs_key_mpls *mpls_key;
+
+ nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key));
+ if (!nla)
+ goto nla_put_failure;
+ mpls_key = nla_data(nla);
+ mpls_key->mpls_lse = output->mpls.top_lse;
+ }
+
+ if ((swkey->eth.type == htons(ETH_P_IP) ||
+ swkey->eth.type == htons(ETH_P_IPV6)) &&
+ swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
+
+ if (swkey->ip.proto == IPPROTO_TCP) {
+ struct ovs_key_tcp *tcp_key;
+
+ nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
+ if (!nla)
+ goto nla_put_failure;
+ tcp_key = nla_data(nla);
+ tcp_key->tcp_src = output->tp.src;
+ tcp_key->tcp_dst = output->tp.dst;
+ if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
+ output->tp.flags))
+ goto nla_put_failure;
+ } else if (swkey->ip.proto == IPPROTO_UDP) {
+ struct ovs_key_udp *udp_key;
+
+ nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
+ if (!nla)
+ goto nla_put_failure;
+ udp_key = nla_data(nla);
+ udp_key->udp_src = output->tp.src;
+ udp_key->udp_dst = output->tp.dst;
+ } else if (swkey->ip.proto == IPPROTO_SCTP) {
+ struct ovs_key_sctp *sctp_key;
+
+ nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
+ if (!nla)
+ goto nla_put_failure;
+ sctp_key = nla_data(nla);
+ sctp_key->sctp_src = output->tp.src;
+ sctp_key->sctp_dst = output->tp.dst;
+ } else if (swkey->eth.type == htons(ETH_P_IP) &&
+ swkey->ip.proto == IPPROTO_ICMP) {
+ struct ovs_key_icmp *icmp_key;
+
+ nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
+ if (!nla)
+ goto nla_put_failure;
+ icmp_key = nla_data(nla);
+ icmp_key->icmp_type = ntohs(output->tp.src);
+ icmp_key->icmp_code = ntohs(output->tp.dst);
+ } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
+ swkey->ip.proto == IPPROTO_ICMPV6) {
+ struct ovs_key_icmpv6 *icmpv6_key;
+
+ nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
+ sizeof(*icmpv6_key));
+ if (!nla)
+ goto nla_put_failure;
+ icmpv6_key = nla_data(nla);
+ icmpv6_key->icmpv6_type = ntohs(output->tp.src);
+ icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
+
+ if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
+ icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
+ struct ovs_key_nd *nd_key;
+
+ nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
+ if (!nla)
+ goto nla_put_failure;
+ nd_key = nla_data(nla);
+ memcpy(nd_key->nd_target, &output->ipv6.nd.target,
+ sizeof(nd_key->nd_target));
+ ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
+ ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
+ }
+ }
+ }
+
+unencap:
+ if (encap)
+ nla_nest_end(skb, encap);
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+int ovs_nla_put_key(const struct sw_flow_key *swkey,
+ const struct sw_flow_key *output, int attr, bool is_mask,
+ struct sk_buff *skb)
+{
+ int err;
+ struct nlattr *nla;
+
+ nla = nla_nest_start(skb, attr);
+ if (!nla)
+ return -EMSGSIZE;
+ err = __ovs_nla_put_key(swkey, output, is_mask, skb);
+ if (err)
+ return err;
+ nla_nest_end(skb, nla);
+
+ return 0;
+}
+
+/* Called with ovs_mutex or RCU read lock. */
+int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
+{
+ if (ovs_identifier_is_ufid(&flow->id))
+ return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
+ flow->id.ufid);
+
+ return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
+ OVS_FLOW_ATTR_KEY, false, skb);
+}
+
+/* Called with ovs_mutex or RCU read lock. */
+int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
+{
+ return ovs_nla_put_key(&flow->key, &flow->key,
+ OVS_FLOW_ATTR_KEY, false, skb);
+}
+
+/* Called with ovs_mutex or RCU read lock. */
+int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
+{
+ return ovs_nla_put_key(&flow->key, &flow->mask->key,
+ OVS_FLOW_ATTR_MASK, true, skb);
+}
+
+#define MAX_ACTIONS_BUFSIZE (32 * 1024)
+
+static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log)
+{
+ struct sw_flow_actions *sfa;
+
+ if (size > MAX_ACTIONS_BUFSIZE) {
+ OVS_NLERR(log, "Flow action size %u bytes exceeds max", size);
+ return ERR_PTR(-EINVAL);
+ }
+
+ sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
+ if (!sfa)
+ return ERR_PTR(-ENOMEM);
+
+ sfa->actions_len = 0;
+ return sfa;
+}
+
+static void ovs_nla_free_set_action(const struct nlattr *a)
+{
+ const struct nlattr *ovs_key = nla_data(a);
+ struct ovs_tunnel_info *ovs_tun;
+
+ switch (nla_type(ovs_key)) {
+ case OVS_KEY_ATTR_TUNNEL_INFO:
+ ovs_tun = nla_data(ovs_key);
+ dst_release((struct dst_entry *)ovs_tun->tun_dst);
+ break;
+ }
+}
+
+void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
+{
+ const struct nlattr *a;
+ int rem;
+
+ if (!sf_acts)
+ return;
+
+ nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) {
+ switch (nla_type(a)) {
+ case OVS_ACTION_ATTR_SET:
+ ovs_nla_free_set_action(a);
+ break;
+ case OVS_ACTION_ATTR_CT:
+ ovs_ct_free_action(a);
+ break;
+ }
+ }
+
+ kfree(sf_acts);
+}
+
+static void __ovs_nla_free_flow_actions(struct rcu_head *head)
+{
+ ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
+}
+
+/* Schedules 'sf_acts' to be freed after the next RCU grace period.
+ * The caller must hold rcu_read_lock for this to be sensible. */
+void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
+{
+ call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
+}
+
+static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
+ int attr_len, bool log)
+{
+
+ struct sw_flow_actions *acts;
+ int new_acts_size;
+ int req_size = NLA_ALIGN(attr_len);
+ int next_offset = offsetof(struct sw_flow_actions, actions) +
+ (*sfa)->actions_len;
+
+ if (req_size <= (ksize(*sfa) - next_offset))
+ goto out;
+
+ new_acts_size = ksize(*sfa) * 2;
+
+ if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
+ if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size)
+ return ERR_PTR(-EMSGSIZE);
+ new_acts_size = MAX_ACTIONS_BUFSIZE;
+ }
+
+ acts = nla_alloc_flow_actions(new_acts_size, log);
+ if (IS_ERR(acts))
+ return (void *)acts;
+
+ memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
+ acts->actions_len = (*sfa)->actions_len;
+ acts->orig_len = (*sfa)->orig_len;
+ kfree(*sfa);
+ *sfa = acts;
+
+out:
+ (*sfa)->actions_len += req_size;
+ return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
+}
+
+static struct nlattr *__add_action(struct sw_flow_actions **sfa,
+ int attrtype, void *data, int len, bool log)
+{
+ struct nlattr *a;
+
+ a = reserve_sfa_size(sfa, nla_attr_size(len), log);
+ if (IS_ERR(a))
+ return a;
+
+ a->nla_type = attrtype;
+ a->nla_len = nla_attr_size(len);
+
+ if (data)
+ memcpy(nla_data(a), data, len);
+ memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
+
+ return a;
+}
+
+int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
+ int len, bool log)
+{
+ struct nlattr *a;
+
+ a = __add_action(sfa, attrtype, data, len, log);
+
+ return PTR_ERR_OR_ZERO(a);
+}
+
+static inline int add_nested_action_start(struct sw_flow_actions **sfa,
+ int attrtype, bool log)
+{
+ int used = (*sfa)->actions_len;
+ int err;
+
+ err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
+ if (err)
+ return err;
+
+ return used;
+}
+
+static inline void add_nested_action_end(struct sw_flow_actions *sfa,
+ int st_offset)
+{
+ struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
+ st_offset);
+
+ a->nla_len = sfa->actions_len - st_offset;
+}
+
+static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
+ const struct sw_flow_key *key,
+ int depth, struct sw_flow_actions **sfa,
+ __be16 eth_type, __be16 vlan_tci, bool log);
+
+static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
+ const struct sw_flow_key *key, int depth,
+ struct sw_flow_actions **sfa,
+ __be16 eth_type, __be16 vlan_tci, bool log)
+{
+ const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
+ const struct nlattr *probability, *actions;
+ const struct nlattr *a;
+ int rem, start, err, st_acts;
+
+ memset(attrs, 0, sizeof(attrs));
+ nla_for_each_nested(a, attr, rem) {
+ int type = nla_type(a);
+ if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
+ return -EINVAL;
+ attrs[type] = a;
+ }
+ if (rem)
+ return -EINVAL;
+
+ probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
+ if (!probability || nla_len(probability) != sizeof(u32))
+ return -EINVAL;
+
+ actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
+ if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
+ return -EINVAL;
+
+ /* validation done, copy sample action. */
+ start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
+ if (start < 0)
+ return start;
+ err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY,
+ nla_data(probability), sizeof(u32), log);
+ if (err)
+ return err;
+ st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log);
+ if (st_acts < 0)
+ return st_acts;
+
+ err = __ovs_nla_copy_actions(net, actions, key, depth + 1, sfa,
+ eth_type, vlan_tci, log);
+ if (err)
+ return err;
+
+ add_nested_action_end(*sfa, st_acts);
+ add_nested_action_end(*sfa, start);
+
+ return 0;
+}
+
+void ovs_match_init(struct sw_flow_match *match,
+ struct sw_flow_key *key,
+ struct sw_flow_mask *mask)
+{
+ memset(match, 0, sizeof(*match));
+ match->key = key;
+ match->mask = mask;
+
+ memset(key, 0, sizeof(*key));
+
+ if (mask) {
+ memset(&mask->key, 0, sizeof(mask->key));
+ mask->range.start = mask->range.end = 0;
+ }
+}
+
+static int validate_geneve_opts(struct sw_flow_key *key)
+{
+ struct geneve_opt *option;
+ int opts_len = key->tun_opts_len;
+ bool crit_opt = false;
+
+ option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
+ while (opts_len > 0) {
+ int len;
+
+ if (opts_len < sizeof(*option))
+ return -EINVAL;
+
+ len = sizeof(*option) + option->length * 4;
+ if (len > opts_len)
+ return -EINVAL;
+
+ crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
+
+ option = (struct geneve_opt *)((u8 *)option + len);
+ opts_len -= len;
+ };
+
+ key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
+
+ return 0;
+}
+
+static int validate_and_copy_set_tun(const struct nlattr *attr,
+ struct sw_flow_actions **sfa, bool log)
+{
+ struct sw_flow_match match;
+ struct sw_flow_key key;
+ struct metadata_dst *tun_dst;
+ struct ip_tunnel_info *tun_info;
+ struct ovs_tunnel_info *ovs_tun;
+ struct nlattr *a;
+ int err = 0, start, opts_type;
+
+ ovs_match_init(&match, &key, NULL);
+ opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log);
+ if (opts_type < 0)
+ return opts_type;
+
+ if (key.tun_opts_len) {
+ switch (opts_type) {
+ case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
+ err = validate_geneve_opts(&key);
+ if (err < 0)
+ return err;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
+ break;
+ }
+ };
+
+ start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
+ if (start < 0)
+ return start;
+
+ tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL);
+ if (!tun_dst)
+ return -ENOMEM;
+
+ a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
+ sizeof(*ovs_tun), log);
+ if (IS_ERR(a)) {
+ dst_release((struct dst_entry *)tun_dst);
+ return PTR_ERR(a);
+ }
+
+ ovs_tun = nla_data(a);
+ ovs_tun->tun_dst = tun_dst;
+
+ tun_info = &tun_dst->u.tun_info;
+ tun_info->mode = IP_TUNNEL_INFO_TX;
+ if (key.tun_proto == AF_INET6)
+ tun_info->mode |= IP_TUNNEL_INFO_IPV6;
+ tun_info->key = key.tun_key;
+
+ /* We need to store the options in the action itself since
+ * everything else will go away after flow setup. We can append
+ * it to tun_info and then point there.
+ */
+ ip_tunnel_info_opts_set(tun_info,
+ TUN_METADATA_OPTS(&key, key.tun_opts_len),
+ key.tun_opts_len);
+ add_nested_action_end(*sfa, start);
+
+ return err;
+}
+
+/* Return false if there are any non-masked bits set.
+ * Mask follows data immediately, before any netlink padding.
+ */
+static bool validate_masked(u8 *data, int len)
+{
+ u8 *mask = data + len;
+
+ while (len--)
+ if (*data++ & ~*mask++)
+ return false;
+
+ return true;
+}
+
+static int validate_set(const struct nlattr *a,
+ const struct sw_flow_key *flow_key,
+ struct sw_flow_actions **sfa,
+ bool *skip_copy, __be16 eth_type, bool masked, bool log)
+{
+ const struct nlattr *ovs_key = nla_data(a);
+ int key_type = nla_type(ovs_key);
+ size_t key_len;
+
+ /* There can be only one key in a action */
+ if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
+ return -EINVAL;
+
+ key_len = nla_len(ovs_key);
+ if (masked)
+ key_len /= 2;
+
+ if (key_type > OVS_KEY_ATTR_MAX ||
+ !check_attr_len(key_len, ovs_key_lens[key_type].len))
+ return -EINVAL;
+
+ if (masked && !validate_masked(nla_data(ovs_key), key_len))
+ return -EINVAL;
+
+ switch (key_type) {
+ const struct ovs_key_ipv4 *ipv4_key;
+ const struct ovs_key_ipv6 *ipv6_key;
+ int err;
+
+ case OVS_KEY_ATTR_PRIORITY:
+ case OVS_KEY_ATTR_SKB_MARK:
+ case OVS_KEY_ATTR_CT_MARK:
+ case OVS_KEY_ATTR_CT_LABELS:
+ case OVS_KEY_ATTR_ETHERNET:
+ break;
+
+ case OVS_KEY_ATTR_TUNNEL:
+ if (eth_p_mpls(eth_type))
+ return -EINVAL;
+
+ if (masked)
+ return -EINVAL; /* Masked tunnel set not supported. */
+
+ *skip_copy = true;
+ err = validate_and_copy_set_tun(a, sfa, log);
+ if (err)
+ return err;
+ break;
+
+ case OVS_KEY_ATTR_IPV4:
+ if (eth_type != htons(ETH_P_IP))
+ return -EINVAL;
+
+ ipv4_key = nla_data(ovs_key);
+
+ if (masked) {
+ const struct ovs_key_ipv4 *mask = ipv4_key + 1;
+
+ /* Non-writeable fields. */
+ if (mask->ipv4_proto || mask->ipv4_frag)
+ return -EINVAL;
+ } else {
+ if (ipv4_key->ipv4_proto != flow_key->ip.proto)
+ return -EINVAL;
+
+ if (ipv4_key->ipv4_frag != flow_key->ip.frag)
+ return -EINVAL;
+ }
+ break;
+
+ case OVS_KEY_ATTR_IPV6:
+ if (eth_type != htons(ETH_P_IPV6))
+ return -EINVAL;
+
+ ipv6_key = nla_data(ovs_key);
+
+ if (masked) {
+ const struct ovs_key_ipv6 *mask = ipv6_key + 1;
+
+ /* Non-writeable fields. */
+ if (mask->ipv6_proto || mask->ipv6_frag)
+ return -EINVAL;
+
+ /* Invalid bits in the flow label mask? */
+ if (ntohl(mask->ipv6_label) & 0xFFF00000)
+ return -EINVAL;
+ } else {
+ if (ipv6_key->ipv6_proto != flow_key->ip.proto)
+ return -EINVAL;
+
+ if (ipv6_key->ipv6_frag != flow_key->ip.frag)
+ return -EINVAL;
+ }
+ if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
+ return -EINVAL;
+
+ break;
+
+ case OVS_KEY_ATTR_TCP:
+ if ((eth_type != htons(ETH_P_IP) &&
+ eth_type != htons(ETH_P_IPV6)) ||
+ flow_key->ip.proto != IPPROTO_TCP)
+ return -EINVAL;
+
+ break;
+
+ case OVS_KEY_ATTR_UDP:
+ if ((eth_type != htons(ETH_P_IP) &&
+ eth_type != htons(ETH_P_IPV6)) ||
+ flow_key->ip.proto != IPPROTO_UDP)
+ return -EINVAL;
+
+ break;
+
+ case OVS_KEY_ATTR_MPLS:
+ if (!eth_p_mpls(eth_type))
+ return -EINVAL;
+ break;
+
+ case OVS_KEY_ATTR_SCTP:
+ if ((eth_type != htons(ETH_P_IP) &&
+ eth_type != htons(ETH_P_IPV6)) ||
+ flow_key->ip.proto != IPPROTO_SCTP)
+ return -EINVAL;
+
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ /* Convert non-masked non-tunnel set actions to masked set actions. */
+ if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
+ int start, len = key_len * 2;
+ struct nlattr *at;
+
+ *skip_copy = true;
+
+ start = add_nested_action_start(sfa,
+ OVS_ACTION_ATTR_SET_TO_MASKED,
+ log);
+ if (start < 0)
+ return start;
+
+ at = __add_action(sfa, key_type, NULL, len, log);
+ if (IS_ERR(at))
+ return PTR_ERR(at);
+
+ memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
+ memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */
+ /* Clear non-writeable bits from otherwise writeable fields. */
+ if (key_type == OVS_KEY_ATTR_IPV6) {
+ struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
+
+ mask->ipv6_label &= htonl(0x000FFFFF);
+ }
+ add_nested_action_end(*sfa, start);
+ }
+
+ return 0;
+}
+
+static int validate_userspace(const struct nlattr *attr)
+{
+ static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
+ [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
+ [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
+ [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
+ };
+ struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
+ int error;
+
+ error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
+ attr, userspace_policy);
+ if (error)
+ return error;
+
+ if (!a[OVS_USERSPACE_ATTR_PID] ||
+ !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int copy_action(const struct nlattr *from,
+ struct sw_flow_actions **sfa, bool log)
+{
+ int totlen = NLA_ALIGN(from->nla_len);
+ struct nlattr *to;
+
+ to = reserve_sfa_size(sfa, from->nla_len, log);
+ if (IS_ERR(to))
+ return PTR_ERR(to);
+
+ memcpy(to, from, totlen);
+ return 0;
+}
+
+static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
+ const struct sw_flow_key *key,
+ int depth, struct sw_flow_actions **sfa,
+ __be16 eth_type, __be16 vlan_tci, bool log)
+{
+ const struct nlattr *a;
+ int rem, err;
+
+ if (depth >= SAMPLE_ACTION_DEPTH)
+ return -EOVERFLOW;
+
+ nla_for_each_nested(a, attr, rem) {
+ /* Expected argument lengths, (u32)-1 for variable length. */
+ static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
+ [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
+ [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
+ [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
+ [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
+ [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
+ [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
+ [OVS_ACTION_ATTR_POP_VLAN] = 0,
+ [OVS_ACTION_ATTR_SET] = (u32)-1,
+ [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
+ [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
+ [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
+ [OVS_ACTION_ATTR_CT] = (u32)-1,
+ };
+ const struct ovs_action_push_vlan *vlan;
+ int type = nla_type(a);
+ bool skip_copy;
+
+ if (type > OVS_ACTION_ATTR_MAX ||
+ (action_lens[type] != nla_len(a) &&
+ action_lens[type] != (u32)-1))
+ return -EINVAL;
+
+ skip_copy = false;
+ switch (type) {
+ case OVS_ACTION_ATTR_UNSPEC:
+ return -EINVAL;
+
+ case OVS_ACTION_ATTR_USERSPACE:
+ err = validate_userspace(a);
+ if (err)
+ return err;
+ break;
+
+ case OVS_ACTION_ATTR_OUTPUT:
+ if (nla_get_u32(a) >= DP_MAX_PORTS)
+ return -EINVAL;
+ break;
+
+ case OVS_ACTION_ATTR_HASH: {
+ const struct ovs_action_hash *act_hash = nla_data(a);
+
+ switch (act_hash->hash_alg) {
+ case OVS_HASH_ALG_L4:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ break;
+ }
+
+ case OVS_ACTION_ATTR_POP_VLAN:
+ vlan_tci = htons(0);
+ break;
+
+ case OVS_ACTION_ATTR_PUSH_VLAN:
+ vlan = nla_data(a);
+ if (vlan->vlan_tpid != htons(ETH_P_8021Q))
+ return -EINVAL;
+ if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
+ return -EINVAL;
+ vlan_tci = vlan->vlan_tci;
+ break;
+
+ case OVS_ACTION_ATTR_RECIRC:
+ break;
+
+ case OVS_ACTION_ATTR_PUSH_MPLS: {
+ const struct ovs_action_push_mpls *mpls = nla_data(a);
+
+ if (!eth_p_mpls(mpls->mpls_ethertype))
+ return -EINVAL;
+ /* Prohibit push MPLS other than to a white list
+ * for packets that have a known tag order.
+ */
+ if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
+ (eth_type != htons(ETH_P_IP) &&
+ eth_type != htons(ETH_P_IPV6) &&
+ eth_type != htons(ETH_P_ARP) &&
+ eth_type != htons(ETH_P_RARP) &&
+ !eth_p_mpls(eth_type)))
+ return -EINVAL;
+ eth_type = mpls->mpls_ethertype;
+ break;
+ }
+
+ case OVS_ACTION_ATTR_POP_MPLS:
+ if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
+ !eth_p_mpls(eth_type))
+ return -EINVAL;
+
+ /* Disallow subsequent L2.5+ set and mpls_pop actions
+ * as there is no check here to ensure that the new
+ * eth_type is valid and thus set actions could
+ * write off the end of the packet or otherwise
+ * corrupt it.
+ *
+ * Support for these actions is planned using packet
+ * recirculation.
+ */
+ eth_type = htons(0);
+ break;
+
+ case OVS_ACTION_ATTR_SET:
+ err = validate_set(a, key, sfa,
+ &skip_copy, eth_type, false, log);
+ if (err)
+ return err;
+ break;
+
+ case OVS_ACTION_ATTR_SET_MASKED:
+ err = validate_set(a, key, sfa,
+ &skip_copy, eth_type, true, log);
+ if (err)
+ return err;
+ break;
+
+ case OVS_ACTION_ATTR_SAMPLE:
+ err = validate_and_copy_sample(net, a, key, depth, sfa,
+ eth_type, vlan_tci, log);
+ if (err)
+ return err;
+ skip_copy = true;
+ break;
+
+ case OVS_ACTION_ATTR_CT:
+ err = ovs_ct_copy_action(net, a, key, sfa, log);
+ if (err)
+ return err;
+ skip_copy = true;
+ break;
+
+ default:
+ OVS_NLERR(log, "Unknown Action type %d", type);
+ return -EINVAL;
+ }
+ if (!skip_copy) {
+ err = copy_action(a, sfa, log);
+ if (err)
+ return err;
+ }
+ }
+
+ if (rem > 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+/* 'key' must be the masked key. */
+int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
+ const struct sw_flow_key *key,
+ struct sw_flow_actions **sfa, bool log)
+{
+ int err;
+
+ *sfa = nla_alloc_flow_actions(nla_len(attr), log);
+ if (IS_ERR(*sfa))
+ return PTR_ERR(*sfa);
+
+ (*sfa)->orig_len = nla_len(attr);
+ err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type,
+ key->eth.tci, log);
+ if (err)
+ ovs_nla_free_flow_actions(*sfa);
+
+ return err;
+}
+
+static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
+{
+ const struct nlattr *a;
+ struct nlattr *start;
+ int err = 0, rem;
+
+ start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
+ if (!start)
+ return -EMSGSIZE;
+
+ nla_for_each_nested(a, attr, rem) {
+ int type = nla_type(a);
+ struct nlattr *st_sample;
+
+ switch (type) {
+ case OVS_SAMPLE_ATTR_PROBABILITY:
+ if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY,
+ sizeof(u32), nla_data(a)))
+ return -EMSGSIZE;
+ break;
+ case OVS_SAMPLE_ATTR_ACTIONS:
+ st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
+ if (!st_sample)
+ return -EMSGSIZE;
+ err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
+ if (err)
+ return err;
+ nla_nest_end(skb, st_sample);
+ break;
+ }
+ }
+
+ nla_nest_end(skb, start);
+ return err;
+}
+
+static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
+{
+ const struct nlattr *ovs_key = nla_data(a);
+ int key_type = nla_type(ovs_key);
+ struct nlattr *start;
+ int err;
+
+ switch (key_type) {
+ case OVS_KEY_ATTR_TUNNEL_INFO: {
+ struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
+ struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
+
+ start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
+ if (!start)
+ return -EMSGSIZE;
+
+ err = ip_tun_to_nlattr(skb, &tun_info->key,
+ ip_tunnel_info_opts(tun_info),
+ tun_info->options_len,
+ ip_tunnel_info_af(tun_info));
+ if (err)
+ return err;
+ nla_nest_end(skb, start);
+ break;
+ }
+ default:
+ if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
+ return -EMSGSIZE;
+ break;
+ }
+
+ return 0;
+}
+
+static int masked_set_action_to_set_action_attr(const struct nlattr *a,
+ struct sk_buff *skb)
+{
+ const struct nlattr *ovs_key = nla_data(a);
+ struct nlattr *nla;
+ size_t key_len = nla_len(ovs_key) / 2;
+
+ /* Revert the conversion we did from a non-masked set action to
+ * masked set action.
+ */
+ nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
+ if (!nla)
+ return -EMSGSIZE;
+
+ if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
+ return -EMSGSIZE;
+
+ nla_nest_end(skb, nla);
+ return 0;
+}
+
+int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
+{
+ const struct nlattr *a;
+ int rem, err;
+
+ nla_for_each_attr(a, attr, len, rem) {
+ int type = nla_type(a);
+
+ switch (type) {
+ case OVS_ACTION_ATTR_SET:
+ err = set_action_to_attr(a, skb);
+ if (err)
+ return err;
+ break;
+
+ case OVS_ACTION_ATTR_SET_TO_MASKED:
+ err = masked_set_action_to_set_action_attr(a, skb);
+ if (err)
+ return err;
+ break;
+
+ case OVS_ACTION_ATTR_SAMPLE:
+ err = sample_action_to_attr(a, skb);
+ if (err)
+ return err;
+ break;
+
+ case OVS_ACTION_ATTR_CT:
+ err = ovs_ct_action_to_attr(nla_data(a), skb);
+ if (err)
+ return err;
+ break;
+
+ default:
+ if (nla_put(skb, type, nla_len(a), nla_data(a)))
+ return -EMSGSIZE;
+ break;
+ }
+ }
+
+ return 0;
+}
diff --git a/net/openvswitch/flow_netlink.h b/net/openvswitch/flow_netlink.h
new file mode 100644
index 0000000..47dd142
--- /dev/null
+++ b/net/openvswitch/flow_netlink.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2007-2013 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+
+#ifndef FLOW_NETLINK_H
+#define FLOW_NETLINK_H 1
+
+#include <linux/kernel.h>
+#include <linux/netlink.h>
+#include <linux/openvswitch.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/rcupdate.h>
+#include <linux/if_ether.h>
+#include <linux/in6.h>
+#include <linux/jiffies.h>
+#include <linux/time.h>
+#include <linux/flex_array.h>
+
+#include <net/inet_ecn.h>
+#include <net/ip_tunnels.h>
+
+#include "flow.h"
+
+size_t ovs_tun_key_attr_size(void);
+size_t ovs_key_attr_size(void);
+
+void ovs_match_init(struct sw_flow_match *match,
+ struct sw_flow_key *key, struct sw_flow_mask *mask);
+
+int ovs_nla_put_key(const struct sw_flow_key *, const struct sw_flow_key *,
+ int attr, bool is_mask, struct sk_buff *);
+int ovs_nla_get_flow_metadata(struct net *, const struct nlattr *,
+ struct sw_flow_key *, bool log);
+
+int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb);
+int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb);
+int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb);
+
+int ovs_nla_get_match(struct net *, struct sw_flow_match *,
+ const struct nlattr *key, const struct nlattr *mask,
+ bool log);
+
+int ovs_nla_put_tunnel_info(struct sk_buff *skb,
+ struct ip_tunnel_info *tun_info);
+
+bool ovs_nla_get_ufid(struct sw_flow_id *, const struct nlattr *, bool log);
+int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
+ const struct sw_flow_key *key, bool log);
+u32 ovs_nla_get_ufid_flags(const struct nlattr *attr);
+
+int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
+ const struct sw_flow_key *key,
+ struct sw_flow_actions **sfa, bool log);
+int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype,
+ void *data, int len, bool log);
+int ovs_nla_put_actions(const struct nlattr *attr,
+ int len, struct sk_buff *skb);
+
+void ovs_nla_free_flow_actions(struct sw_flow_actions *);
+void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *);
+
+#endif /* flow_netlink.h */
diff --git a/net/openvswitch/flow_table.c b/net/openvswitch/flow_table.c
new file mode 100644
index 0000000..d073fff
--- /dev/null
+++ b/net/openvswitch/flow_table.c
@@ -0,0 +1,782 @@
+/*
+ * Copyright (c) 2007-2014 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#include "flow.h"
+#include "datapath.h"
+#include "flow_netlink.h"
+#include <linux/uaccess.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <net/llc_pdu.h>
+#include <linux/kernel.h>
+#include <linux/jhash.h>
+#include <linux/jiffies.h>
+#include <linux/llc.h>
+#include <linux/module.h>
+#include <linux/in.h>
+#include <linux/rcupdate.h>
+#include <linux/if_arp.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/sctp.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/icmp.h>
+#include <linux/icmpv6.h>
+#include <linux/rculist.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/ndisc.h>
+
+#define TBL_MIN_BUCKETS 1024
+#define REHASH_INTERVAL (10 * 60 * HZ)
+
+static struct kmem_cache *flow_cache;
+struct kmem_cache *flow_stats_cache __read_mostly;
+
+static u16 range_n_bytes(const struct sw_flow_key_range *range)
+{
+ return range->end - range->start;
+}
+
+void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src,
+ bool full, const struct sw_flow_mask *mask)
+{
+ int start = full ? 0 : mask->range.start;
+ int len = full ? sizeof *dst : range_n_bytes(&mask->range);
+ const long *m = (const long *)((const u8 *)&mask->key + start);
+ const long *s = (const long *)((const u8 *)src + start);
+ long *d = (long *)((u8 *)dst + start);
+ int i;
+
+ /* If 'full' is true then all of 'dst' is fully initialized. Otherwise,
+ * if 'full' is false the memory outside of the 'mask->range' is left
+ * uninitialized. This can be used as an optimization when further
+ * operations on 'dst' only use contents within 'mask->range'.
+ */
+ for (i = 0; i < len; i += sizeof(long))
+ *d++ = *s++ & *m++;
+}
+
+struct sw_flow *ovs_flow_alloc(void)
+{
+ struct sw_flow *flow;
+ struct flow_stats *stats;
+ int node;
+
+ flow = kmem_cache_alloc(flow_cache, GFP_KERNEL);
+ if (!flow)
+ return ERR_PTR(-ENOMEM);
+
+ flow->sf_acts = NULL;
+ flow->mask = NULL;
+ flow->id.unmasked_key = NULL;
+ flow->id.ufid_len = 0;
+ flow->stats_last_writer = NUMA_NO_NODE;
+
+ /* Initialize the default stat node. */
+ stats = kmem_cache_alloc_node(flow_stats_cache,
+ GFP_KERNEL | __GFP_ZERO,
+ node_online(0) ? 0 : NUMA_NO_NODE);
+ if (!stats)
+ goto err;
+
+ spin_lock_init(&stats->lock);
+
+ RCU_INIT_POINTER(flow->stats[0], stats);
+
+ for_each_node(node)
+ if (node != 0)
+ RCU_INIT_POINTER(flow->stats[node], NULL);
+
+ return flow;
+err:
+ kmem_cache_free(flow_cache, flow);
+ return ERR_PTR(-ENOMEM);
+}
+
+int ovs_flow_tbl_count(const struct flow_table *table)
+{
+ return table->count;
+}
+
+static struct flex_array *alloc_buckets(unsigned int n_buckets)
+{
+ struct flex_array *buckets;
+ int i, err;
+
+ buckets = flex_array_alloc(sizeof(struct hlist_head),
+ n_buckets, GFP_KERNEL);
+ if (!buckets)
+ return NULL;
+
+ err = flex_array_prealloc(buckets, 0, n_buckets, GFP_KERNEL);
+ if (err) {
+ flex_array_free(buckets);
+ return NULL;
+ }
+
+ for (i = 0; i < n_buckets; i++)
+ INIT_HLIST_HEAD((struct hlist_head *)
+ flex_array_get(buckets, i));
+
+ return buckets;
+}
+
+static void flow_free(struct sw_flow *flow)
+{
+ int node;
+
+ if (ovs_identifier_is_key(&flow->id))
+ kfree(flow->id.unmasked_key);
+ if (flow->sf_acts)
+ ovs_nla_free_flow_actions((struct sw_flow_actions __force *)flow->sf_acts);
+ for_each_node(node)
+ if (flow->stats[node])
+ kmem_cache_free(flow_stats_cache,
+ (struct flow_stats __force *)flow->stats[node]);
+ kmem_cache_free(flow_cache, flow);
+}
+
+static void rcu_free_flow_callback(struct rcu_head *rcu)
+{
+ struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu);
+
+ flow_free(flow);
+}
+
+void ovs_flow_free(struct sw_flow *flow, bool deferred)
+{
+ if (!flow)
+ return;
+
+ if (deferred)
+ call_rcu(&flow->rcu, rcu_free_flow_callback);
+ else
+ flow_free(flow);
+}
+
+static void free_buckets(struct flex_array *buckets)
+{
+ flex_array_free(buckets);
+}
+
+
+static void __table_instance_destroy(struct table_instance *ti)
+{
+ free_buckets(ti->buckets);
+ kfree(ti);
+}
+
+static struct table_instance *table_instance_alloc(int new_size)
+{
+ struct table_instance *ti = kmalloc(sizeof(*ti), GFP_KERNEL);
+
+ if (!ti)
+ return NULL;
+
+ ti->buckets = alloc_buckets(new_size);
+
+ if (!ti->buckets) {
+ kfree(ti);
+ return NULL;
+ }
+ ti->n_buckets = new_size;
+ ti->node_ver = 0;
+ ti->keep_flows = false;
+ get_random_bytes(&ti->hash_seed, sizeof(u32));
+
+ return ti;
+}
+
+int ovs_flow_tbl_init(struct flow_table *table)
+{
+ struct table_instance *ti, *ufid_ti;
+
+ ti = table_instance_alloc(TBL_MIN_BUCKETS);
+
+ if (!ti)
+ return -ENOMEM;
+
+ ufid_ti = table_instance_alloc(TBL_MIN_BUCKETS);
+ if (!ufid_ti)
+ goto free_ti;
+
+ rcu_assign_pointer(table->ti, ti);
+ rcu_assign_pointer(table->ufid_ti, ufid_ti);
+ INIT_LIST_HEAD(&table->mask_list);
+ table->last_rehash = jiffies;
+ table->count = 0;
+ table->ufid_count = 0;
+ return 0;
+
+free_ti:
+ __table_instance_destroy(ti);
+ return -ENOMEM;
+}
+
+static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu)
+{
+ struct table_instance *ti = container_of(rcu, struct table_instance, rcu);
+
+ __table_instance_destroy(ti);
+}
+
+static void table_instance_destroy(struct table_instance *ti,
+ struct table_instance *ufid_ti,
+ bool deferred)
+{
+ int i;
+
+ if (!ti)
+ return;
+
+ BUG_ON(!ufid_ti);
+ if (ti->keep_flows)
+ goto skip_flows;
+
+ for (i = 0; i < ti->n_buckets; i++) {
+ struct sw_flow *flow;
+ struct hlist_head *head = flex_array_get(ti->buckets, i);
+ struct hlist_node *n;
+ int ver = ti->node_ver;
+ int ufid_ver = ufid_ti->node_ver;
+
+ hlist_for_each_entry_safe(flow, n, head, flow_table.node[ver]) {
+ hlist_del_rcu(&flow->flow_table.node[ver]);
+ if (ovs_identifier_is_ufid(&flow->id))
+ hlist_del_rcu(&flow->ufid_table.node[ufid_ver]);
+ ovs_flow_free(flow, deferred);
+ }
+ }
+
+skip_flows:
+ if (deferred) {
+ call_rcu(&ti->rcu, flow_tbl_destroy_rcu_cb);
+ call_rcu(&ufid_ti->rcu, flow_tbl_destroy_rcu_cb);
+ } else {
+ __table_instance_destroy(ti);
+ __table_instance_destroy(ufid_ti);
+ }
+}
+
+/* No need for locking this function is called from RCU callback or
+ * error path.
+ */
+void ovs_flow_tbl_destroy(struct flow_table *table)
+{
+ struct table_instance *ti = rcu_dereference_raw(table->ti);
+ struct table_instance *ufid_ti = rcu_dereference_raw(table->ufid_ti);
+
+ table_instance_destroy(ti, ufid_ti, false);
+}
+
+struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *ti,
+ u32 *bucket, u32 *last)
+{
+ struct sw_flow *flow;
+ struct hlist_head *head;
+ int ver;
+ int i;
+
+ ver = ti->node_ver;
+ while (*bucket < ti->n_buckets) {
+ i = 0;
+ head = flex_array_get(ti->buckets, *bucket);
+ hlist_for_each_entry_rcu(flow, head, flow_table.node[ver]) {
+ if (i < *last) {
+ i++;
+ continue;
+ }
+ *last = i + 1;
+ return flow;
+ }
+ (*bucket)++;
+ *last = 0;
+ }
+
+ return NULL;
+}
+
+static struct hlist_head *find_bucket(struct table_instance *ti, u32 hash)
+{
+ hash = jhash_1word(hash, ti->hash_seed);
+ return flex_array_get(ti->buckets,
+ (hash & (ti->n_buckets - 1)));
+}
+
+static void table_instance_insert(struct table_instance *ti,
+ struct sw_flow *flow)
+{
+ struct hlist_head *head;
+
+ head = find_bucket(ti, flow->flow_table.hash);
+ hlist_add_head_rcu(&flow->flow_table.node[ti->node_ver], head);
+}
+
+static void ufid_table_instance_insert(struct table_instance *ti,
+ struct sw_flow *flow)
+{
+ struct hlist_head *head;
+
+ head = find_bucket(ti, flow->ufid_table.hash);
+ hlist_add_head_rcu(&flow->ufid_table.node[ti->node_ver], head);
+}
+
+static void flow_table_copy_flows(struct table_instance *old,
+ struct table_instance *new, bool ufid)
+{
+ int old_ver;
+ int i;
+
+ old_ver = old->node_ver;
+ new->node_ver = !old_ver;
+
+ /* Insert in new table. */
+ for (i = 0; i < old->n_buckets; i++) {
+ struct sw_flow *flow;
+ struct hlist_head *head;
+
+ head = flex_array_get(old->buckets, i);
+
+ if (ufid)
+ hlist_for_each_entry(flow, head,
+ ufid_table.node[old_ver])
+ ufid_table_instance_insert(new, flow);
+ else
+ hlist_for_each_entry(flow, head,
+ flow_table.node[old_ver])
+ table_instance_insert(new, flow);
+ }
+
+ old->keep_flows = true;
+}
+
+static struct table_instance *table_instance_rehash(struct table_instance *ti,
+ int n_buckets, bool ufid)
+{
+ struct table_instance *new_ti;
+
+ new_ti = table_instance_alloc(n_buckets);
+ if (!new_ti)
+ return NULL;
+
+ flow_table_copy_flows(ti, new_ti, ufid);
+
+ return new_ti;
+}
+
+int ovs_flow_tbl_flush(struct flow_table *flow_table)
+{
+ struct table_instance *old_ti, *new_ti;
+ struct table_instance *old_ufid_ti, *new_ufid_ti;
+
+ new_ti = table_instance_alloc(TBL_MIN_BUCKETS);
+ if (!new_ti)
+ return -ENOMEM;
+ new_ufid_ti = table_instance_alloc(TBL_MIN_BUCKETS);
+ if (!new_ufid_ti)
+ goto err_free_ti;
+
+ old_ti = ovsl_dereference(flow_table->ti);
+ old_ufid_ti = ovsl_dereference(flow_table->ufid_ti);
+
+ rcu_assign_pointer(flow_table->ti, new_ti);
+ rcu_assign_pointer(flow_table->ufid_ti, new_ufid_ti);
+ flow_table->last_rehash = jiffies;
+ flow_table->count = 0;
+ flow_table->ufid_count = 0;
+
+ table_instance_destroy(old_ti, old_ufid_ti, true);
+ return 0;
+
+err_free_ti:
+ __table_instance_destroy(new_ti);
+ return -ENOMEM;
+}
+
+static u32 flow_hash(const struct sw_flow_key *key,
+ const struct sw_flow_key_range *range)
+{
+ int key_start = range->start;
+ int key_end = range->end;
+ const u32 *hash_key = (const u32 *)((const u8 *)key + key_start);
+ int hash_u32s = (key_end - key_start) >> 2;
+
+ /* Make sure number of hash bytes are multiple of u32. */
+ BUILD_BUG_ON(sizeof(long) % sizeof(u32));
+
+ return jhash2(hash_key, hash_u32s, 0);
+}
+
+static int flow_key_start(const struct sw_flow_key *key)
+{
+ if (key->tun_proto)
+ return 0;
+ else
+ return rounddown(offsetof(struct sw_flow_key, phy),
+ sizeof(long));
+}
+
+static bool cmp_key(const struct sw_flow_key *key1,
+ const struct sw_flow_key *key2,
+ int key_start, int key_end)
+{
+ const long *cp1 = (const long *)((const u8 *)key1 + key_start);
+ const long *cp2 = (const long *)((const u8 *)key2 + key_start);
+ long diffs = 0;
+ int i;
+
+ for (i = key_start; i < key_end; i += sizeof(long))
+ diffs |= *cp1++ ^ *cp2++;
+
+ return diffs == 0;
+}
+
+static bool flow_cmp_masked_key(const struct sw_flow *flow,
+ const struct sw_flow_key *key,
+ const struct sw_flow_key_range *range)
+{
+ return cmp_key(&flow->key, key, range->start, range->end);
+}
+
+static bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow,
+ const struct sw_flow_match *match)
+{
+ struct sw_flow_key *key = match->key;
+ int key_start = flow_key_start(key);
+ int key_end = match->range.end;
+
+ BUG_ON(ovs_identifier_is_ufid(&flow->id));
+ return cmp_key(flow->id.unmasked_key, key, key_start, key_end);
+}
+
+static struct sw_flow *masked_flow_lookup(struct table_instance *ti,
+ const struct sw_flow_key *unmasked,
+ const struct sw_flow_mask *mask)
+{
+ struct sw_flow *flow;
+ struct hlist_head *head;
+ u32 hash;
+ struct sw_flow_key masked_key;
+
+ ovs_flow_mask_key(&masked_key, unmasked, false, mask);
+ hash = flow_hash(&masked_key, &mask->range);
+ head = find_bucket(ti, hash);
+ hlist_for_each_entry_rcu(flow, head, flow_table.node[ti->node_ver]) {
+ if (flow->mask == mask && flow->flow_table.hash == hash &&
+ flow_cmp_masked_key(flow, &masked_key, &mask->range))
+ return flow;
+ }
+ return NULL;
+}
+
+struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *tbl,
+ const struct sw_flow_key *key,
+ u32 *n_mask_hit)
+{
+ struct table_instance *ti = rcu_dereference_ovsl(tbl->ti);
+ struct sw_flow_mask *mask;
+ struct sw_flow *flow;
+
+ *n_mask_hit = 0;
+ list_for_each_entry_rcu(mask, &tbl->mask_list, list) {
+ (*n_mask_hit)++;
+ flow = masked_flow_lookup(ti, key, mask);
+ if (flow) /* Found */
+ return flow;
+ }
+ return NULL;
+}
+
+struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *tbl,
+ const struct sw_flow_key *key)
+{
+ u32 __always_unused n_mask_hit;
+
+ return ovs_flow_tbl_lookup_stats(tbl, key, &n_mask_hit);
+}
+
+struct sw_flow *ovs_flow_tbl_lookup_exact(struct flow_table *tbl,
+ const struct sw_flow_match *match)
+{
+ struct table_instance *ti = rcu_dereference_ovsl(tbl->ti);
+ struct sw_flow_mask *mask;
+ struct sw_flow *flow;
+
+ /* Always called under ovs-mutex. */
+ list_for_each_entry(mask, &tbl->mask_list, list) {
+ flow = masked_flow_lookup(ti, match->key, mask);
+ if (flow && ovs_identifier_is_key(&flow->id) &&
+ ovs_flow_cmp_unmasked_key(flow, match))
+ return flow;
+ }
+ return NULL;
+}
+
+static u32 ufid_hash(const struct sw_flow_id *sfid)
+{
+ return jhash(sfid->ufid, sfid->ufid_len, 0);
+}
+
+static bool ovs_flow_cmp_ufid(const struct sw_flow *flow,
+ const struct sw_flow_id *sfid)
+{
+ if (flow->id.ufid_len != sfid->ufid_len)
+ return false;
+
+ return !memcmp(flow->id.ufid, sfid->ufid, sfid->ufid_len);
+}
+
+bool ovs_flow_cmp(const struct sw_flow *flow, const struct sw_flow_match *match)
+{
+ if (ovs_identifier_is_ufid(&flow->id))
+ return flow_cmp_masked_key(flow, match->key, &match->range);
+
+ return ovs_flow_cmp_unmasked_key(flow, match);
+}
+
+struct sw_flow *ovs_flow_tbl_lookup_ufid(struct flow_table *tbl,
+ const struct sw_flow_id *ufid)
+{
+ struct table_instance *ti = rcu_dereference_ovsl(tbl->ufid_ti);
+ struct sw_flow *flow;
+ struct hlist_head *head;
+ u32 hash;
+
+ hash = ufid_hash(ufid);
+ head = find_bucket(ti, hash);
+ hlist_for_each_entry_rcu(flow, head, ufid_table.node[ti->node_ver]) {
+ if (flow->ufid_table.hash == hash &&
+ ovs_flow_cmp_ufid(flow, ufid))
+ return flow;
+ }
+ return NULL;
+}
+
+int ovs_flow_tbl_num_masks(const struct flow_table *table)
+{
+ struct sw_flow_mask *mask;
+ int num = 0;
+
+ list_for_each_entry(mask, &table->mask_list, list)
+ num++;
+
+ return num;
+}
+
+static struct table_instance *table_instance_expand(struct table_instance *ti,
+ bool ufid)
+{
+ return table_instance_rehash(ti, ti->n_buckets * 2, ufid);
+}
+
+/* Remove 'mask' from the mask list, if it is not needed any more. */
+static void flow_mask_remove(struct flow_table *tbl, struct sw_flow_mask *mask)
+{
+ if (mask) {
+ /* ovs-lock is required to protect mask-refcount and
+ * mask list.
+ */
+ ASSERT_OVSL();
+ BUG_ON(!mask->ref_count);
+ mask->ref_count--;
+
+ if (!mask->ref_count) {
+ list_del_rcu(&mask->list);
+ kfree_rcu(mask, rcu);
+ }
+ }
+}
+
+/* Must be called with OVS mutex held. */
+void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow)
+{
+ struct table_instance *ti = ovsl_dereference(table->ti);
+ struct table_instance *ufid_ti = ovsl_dereference(table->ufid_ti);
+
+ BUG_ON(table->count == 0);
+ hlist_del_rcu(&flow->flow_table.node[ti->node_ver]);
+ table->count--;
+ if (ovs_identifier_is_ufid(&flow->id)) {
+ hlist_del_rcu(&flow->ufid_table.node[ufid_ti->node_ver]);
+ table->ufid_count--;
+ }
+
+ /* RCU delete the mask. 'flow->mask' is not NULLed, as it should be
+ * accessible as long as the RCU read lock is held.
+ */
+ flow_mask_remove(table, flow->mask);
+}
+
+static struct sw_flow_mask *mask_alloc(void)
+{
+ struct sw_flow_mask *mask;
+
+ mask = kmalloc(sizeof(*mask), GFP_KERNEL);
+ if (mask)
+ mask->ref_count = 1;
+
+ return mask;
+}
+
+static bool mask_equal(const struct sw_flow_mask *a,
+ const struct sw_flow_mask *b)
+{
+ const u8 *a_ = (const u8 *)&a->key + a->range.start;
+ const u8 *b_ = (const u8 *)&b->key + b->range.start;
+
+ return (a->range.end == b->range.end)
+ && (a->range.start == b->range.start)
+ && (memcmp(a_, b_, range_n_bytes(&a->range)) == 0);
+}
+
+static struct sw_flow_mask *flow_mask_find(const struct flow_table *tbl,
+ const struct sw_flow_mask *mask)
+{
+ struct list_head *ml;
+
+ list_for_each(ml, &tbl->mask_list) {
+ struct sw_flow_mask *m;
+ m = container_of(ml, struct sw_flow_mask, list);
+ if (mask_equal(mask, m))
+ return m;
+ }
+
+ return NULL;
+}
+
+/* Add 'mask' into the mask list, if it is not already there. */
+static int flow_mask_insert(struct flow_table *tbl, struct sw_flow *flow,
+ const struct sw_flow_mask *new)
+{
+ struct sw_flow_mask *mask;
+ mask = flow_mask_find(tbl, new);
+ if (!mask) {
+ /* Allocate a new mask if none exsits. */
+ mask = mask_alloc();
+ if (!mask)
+ return -ENOMEM;
+ mask->key = new->key;
+ mask->range = new->range;
+ list_add_rcu(&mask->list, &tbl->mask_list);
+ } else {
+ BUG_ON(!mask->ref_count);
+ mask->ref_count++;
+ }
+
+ flow->mask = mask;
+ return 0;
+}
+
+/* Must be called with OVS mutex held. */
+static void flow_key_insert(struct flow_table *table, struct sw_flow *flow)
+{
+ struct table_instance *new_ti = NULL;
+ struct table_instance *ti;
+
+ flow->flow_table.hash = flow_hash(&flow->key, &flow->mask->range);
+ ti = ovsl_dereference(table->ti);
+ table_instance_insert(ti, flow);
+ table->count++;
+
+ /* Expand table, if necessary, to make room. */
+ if (table->count > ti->n_buckets)
+ new_ti = table_instance_expand(ti, false);
+ else if (time_after(jiffies, table->last_rehash + REHASH_INTERVAL))
+ new_ti = table_instance_rehash(ti, ti->n_buckets, false);
+
+ if (new_ti) {
+ rcu_assign_pointer(table->ti, new_ti);
+ call_rcu(&ti->rcu, flow_tbl_destroy_rcu_cb);
+ table->last_rehash = jiffies;
+ }
+}
+
+/* Must be called with OVS mutex held. */
+static void flow_ufid_insert(struct flow_table *table, struct sw_flow *flow)
+{
+ struct table_instance *ti;
+
+ flow->ufid_table.hash = ufid_hash(&flow->id);
+ ti = ovsl_dereference(table->ufid_ti);
+ ufid_table_instance_insert(ti, flow);
+ table->ufid_count++;
+
+ /* Expand table, if necessary, to make room. */
+ if (table->ufid_count > ti->n_buckets) {
+ struct table_instance *new_ti;
+
+ new_ti = table_instance_expand(ti, true);
+ if (new_ti) {
+ rcu_assign_pointer(table->ufid_ti, new_ti);
+ call_rcu(&ti->rcu, flow_tbl_destroy_rcu_cb);
+ }
+ }
+}
+
+/* Must be called with OVS mutex held. */
+int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow,
+ const struct sw_flow_mask *mask)
+{
+ int err;
+
+ err = flow_mask_insert(table, flow, mask);
+ if (err)
+ return err;
+ flow_key_insert(table, flow);
+ if (ovs_identifier_is_ufid(&flow->id))
+ flow_ufid_insert(table, flow);
+
+ return 0;
+}
+
+/* Initializes the flow module.
+ * Returns zero if successful or a negative error code. */
+int ovs_flow_init(void)
+{
+ BUILD_BUG_ON(__alignof__(struct sw_flow_key) % __alignof__(long));
+ BUILD_BUG_ON(sizeof(struct sw_flow_key) % sizeof(long));
+
+ flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow)
+ + (nr_node_ids
+ * sizeof(struct flow_stats *)),
+ 0, 0, NULL);
+ if (flow_cache == NULL)
+ return -ENOMEM;
+
+ flow_stats_cache
+ = kmem_cache_create("sw_flow_stats", sizeof(struct flow_stats),
+ 0, SLAB_HWCACHE_ALIGN, NULL);
+ if (flow_stats_cache == NULL) {
+ kmem_cache_destroy(flow_cache);
+ flow_cache = NULL;
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+/* Uninitializes the flow module. */
+void ovs_flow_exit(void)
+{
+ kmem_cache_destroy(flow_stats_cache);
+ kmem_cache_destroy(flow_cache);
+}
diff --git a/net/openvswitch/flow_table.h b/net/openvswitch/flow_table.h
new file mode 100644
index 0000000..2dd9900
--- /dev/null
+++ b/net/openvswitch/flow_table.h
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2007-2013 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifndef FLOW_TABLE_H
+#define FLOW_TABLE_H 1
+
+#include <linux/kernel.h>
+#include <linux/netlink.h>
+#include <linux/openvswitch.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/rcupdate.h>
+#include <linux/if_ether.h>
+#include <linux/in6.h>
+#include <linux/jiffies.h>
+#include <linux/time.h>
+#include <linux/flex_array.h>
+
+#include <net/inet_ecn.h>
+#include <net/ip_tunnels.h>
+
+#include "flow.h"
+
+struct table_instance {
+ struct flex_array *buckets;
+ unsigned int n_buckets;
+ struct rcu_head rcu;
+ int node_ver;
+ u32 hash_seed;
+ bool keep_flows;
+};
+
+struct flow_table {
+ struct table_instance __rcu *ti;
+ struct table_instance __rcu *ufid_ti;
+ struct list_head mask_list;
+ unsigned long last_rehash;
+ unsigned int count;
+ unsigned int ufid_count;
+};
+
+extern struct kmem_cache *flow_stats_cache;
+
+int ovs_flow_init(void);
+void ovs_flow_exit(void);
+
+struct sw_flow *ovs_flow_alloc(void);
+void ovs_flow_free(struct sw_flow *, bool deferred);
+
+int ovs_flow_tbl_init(struct flow_table *);
+int ovs_flow_tbl_count(const struct flow_table *table);
+void ovs_flow_tbl_destroy(struct flow_table *table);
+int ovs_flow_tbl_flush(struct flow_table *flow_table);
+
+int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow,
+ const struct sw_flow_mask *mask);
+void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow);
+int ovs_flow_tbl_num_masks(const struct flow_table *table);
+struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *table,
+ u32 *bucket, u32 *idx);
+struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *,
+ const struct sw_flow_key *,
+ u32 *n_mask_hit);
+struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *,
+ const struct sw_flow_key *);
+struct sw_flow *ovs_flow_tbl_lookup_exact(struct flow_table *tbl,
+ const struct sw_flow_match *match);
+struct sw_flow *ovs_flow_tbl_lookup_ufid(struct flow_table *,
+ const struct sw_flow_id *);
+
+bool ovs_flow_cmp(const struct sw_flow *, const struct sw_flow_match *);
+
+void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src,
+ bool full, const struct sw_flow_mask *mask);
+#endif /* flow_table.h */
diff --git a/net/openvswitch/vport-geneve.c b/net/openvswitch/vport-geneve.c
new file mode 100644
index 0000000..e41cd12
--- /dev/null
+++ b/net/openvswitch/vport-geneve.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 2014 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/net.h>
+#include <linux/rculist.h>
+#include <linux/udp.h>
+#include <linux/if_vlan.h>
+#include <linux/module.h>
+
+#include <net/geneve.h>
+#include <net/icmp.h>
+#include <net/ip.h>
+#include <net/route.h>
+#include <net/udp.h>
+#include <net/xfrm.h>
+
+#include "datapath.h"
+#include "vport.h"
+#include "vport-netdev.h"
+
+static struct vport_ops ovs_geneve_vport_ops;
+/**
+ * struct geneve_port - Keeps track of open UDP ports
+ * @dst_port: destination port.
+ */
+struct geneve_port {
+ u16 port_no;
+};
+
+static inline struct geneve_port *geneve_vport(const struct vport *vport)
+{
+ return vport_priv(vport);
+}
+
+static int geneve_get_options(const struct vport *vport,
+ struct sk_buff *skb)
+{
+ struct geneve_port *geneve_port = geneve_vport(vport);
+
+ if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, geneve_port->port_no))
+ return -EMSGSIZE;
+ return 0;
+}
+
+static struct vport *geneve_tnl_create(const struct vport_parms *parms)
+{
+ struct net *net = ovs_dp_get_net(parms->dp);
+ struct nlattr *options = parms->options;
+ struct geneve_port *geneve_port;
+ struct net_device *dev;
+ struct vport *vport;
+ struct nlattr *a;
+ u16 dst_port;
+ int err;
+
+ if (!options) {
+ err = -EINVAL;
+ goto error;
+ }
+
+ a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
+ if (a && nla_len(a) == sizeof(u16)) {
+ dst_port = nla_get_u16(a);
+ } else {
+ /* Require destination port from userspace. */
+ err = -EINVAL;
+ goto error;
+ }
+
+ vport = ovs_vport_alloc(sizeof(struct geneve_port),
+ &ovs_geneve_vport_ops, parms);
+ if (IS_ERR(vport))
+ return vport;
+
+ geneve_port = geneve_vport(vport);
+ geneve_port->port_no = dst_port;
+
+ rtnl_lock();
+ dev = geneve_dev_create_fb(net, parms->name, NET_NAME_USER, dst_port);
+ if (IS_ERR(dev)) {
+ rtnl_unlock();
+ ovs_vport_free(vport);
+ return ERR_CAST(dev);
+ }
+
+ dev_change_flags(dev, dev->flags | IFF_UP);
+ rtnl_unlock();
+ return vport;
+error:
+ return ERR_PTR(err);
+}
+
+static struct vport *geneve_create(const struct vport_parms *parms)
+{
+ struct vport *vport;
+
+ vport = geneve_tnl_create(parms);
+ if (IS_ERR(vport))
+ return vport;
+
+ return ovs_netdev_link(vport, parms->name);
+}
+
+static struct vport_ops ovs_geneve_vport_ops = {
+ .type = OVS_VPORT_TYPE_GENEVE,
+ .create = geneve_create,
+ .destroy = ovs_netdev_tunnel_destroy,
+ .get_options = geneve_get_options,
+ .send = dev_queue_xmit,
+};
+
+static int __init ovs_geneve_tnl_init(void)
+{
+ return ovs_vport_ops_register(&ovs_geneve_vport_ops);
+}
+
+static void __exit ovs_geneve_tnl_exit(void)
+{
+ ovs_vport_ops_unregister(&ovs_geneve_vport_ops);
+}
+
+module_init(ovs_geneve_tnl_init);
+module_exit(ovs_geneve_tnl_exit);
+
+MODULE_DESCRIPTION("OVS: Geneve swiching port");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("vport-type-5");
diff --git a/net/openvswitch/vport-gre.c b/net/openvswitch/vport-gre.c
new file mode 100644
index 0000000..7f8897f
--- /dev/null
+++ b/net/openvswitch/vport-gre.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2007-2014 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/if.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <linux/if_tunnel.h>
+#include <linux/if_vlan.h>
+#include <linux/in.h>
+#include <linux/in_route.h>
+#include <linux/inetdevice.h>
+#include <linux/jhash.h>
+#include <linux/list.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/workqueue.h>
+#include <linux/rculist.h>
+#include <net/route.h>
+#include <net/xfrm.h>
+
+#include <net/icmp.h>
+#include <net/ip.h>
+#include <net/ip_tunnels.h>
+#include <net/gre.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include <net/protocol.h>
+
+#include "datapath.h"
+#include "vport.h"
+#include "vport-netdev.h"
+
+static struct vport_ops ovs_gre_vport_ops;
+
+static struct vport *gre_tnl_create(const struct vport_parms *parms)
+{
+ struct net *net = ovs_dp_get_net(parms->dp);
+ struct net_device *dev;
+ struct vport *vport;
+
+ vport = ovs_vport_alloc(0, &ovs_gre_vport_ops, parms);
+ if (IS_ERR(vport))
+ return vport;
+
+ rtnl_lock();
+ dev = gretap_fb_dev_create(net, parms->name, NET_NAME_USER);
+ if (IS_ERR(dev)) {
+ rtnl_unlock();
+ ovs_vport_free(vport);
+ return ERR_CAST(dev);
+ }
+
+ dev_change_flags(dev, dev->flags | IFF_UP);
+ rtnl_unlock();
+
+ return vport;
+}
+
+static struct vport *gre_create(const struct vport_parms *parms)
+{
+ struct vport *vport;
+
+ vport = gre_tnl_create(parms);
+ if (IS_ERR(vport))
+ return vport;
+
+ return ovs_netdev_link(vport, parms->name);
+}
+
+static struct vport_ops ovs_gre_vport_ops = {
+ .type = OVS_VPORT_TYPE_GRE,
+ .create = gre_create,
+ .send = dev_queue_xmit,
+ .destroy = ovs_netdev_tunnel_destroy,
+};
+
+static int __init ovs_gre_tnl_init(void)
+{
+ return ovs_vport_ops_register(&ovs_gre_vport_ops);
+}
+
+static void __exit ovs_gre_tnl_exit(void)
+{
+ ovs_vport_ops_unregister(&ovs_gre_vport_ops);
+}
+
+module_init(ovs_gre_tnl_init);
+module_exit(ovs_gre_tnl_exit);
+
+MODULE_DESCRIPTION("OVS: GRE switching port");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("vport-type-3");
diff --git a/net/openvswitch/vport-internal_dev.c b/net/openvswitch/vport-internal_dev.c
new file mode 100644
index 0000000..ec76398
--- /dev/null
+++ b/net/openvswitch/vport-internal_dev.c
@@ -0,0 +1,313 @@
+/*
+ * Copyright (c) 2007-2012 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#include <linux/hardirq.h>
+#include <linux/if_vlan.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/skbuff.h>
+
+#include <net/dst.h>
+#include <net/xfrm.h>
+#include <net/rtnetlink.h>
+
+#include "datapath.h"
+#include "vport-internal_dev.h"
+#include "vport-netdev.h"
+
+struct internal_dev {
+ struct vport *vport;
+};
+
+static struct vport_ops ovs_internal_vport_ops;
+
+static struct internal_dev *internal_dev_priv(struct net_device *netdev)
+{
+ return netdev_priv(netdev);
+}
+
+/* Called with rcu_read_lock_bh. */
+static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+ int len, err;
+
+ len = skb->len;
+ rcu_read_lock();
+ err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
+ rcu_read_unlock();
+
+ if (likely(!err)) {
+ struct pcpu_sw_netstats *tstats = this_cpu_ptr(netdev->tstats);
+
+ u64_stats_update_begin(&tstats->syncp);
+ tstats->tx_bytes += len;
+ tstats->tx_packets++;
+ u64_stats_update_end(&tstats->syncp);
+ } else {
+ netdev->stats.tx_errors++;
+ }
+ return 0;
+}
+
+static int internal_dev_open(struct net_device *netdev)
+{
+ netif_start_queue(netdev);
+ return 0;
+}
+
+static int internal_dev_stop(struct net_device *netdev)
+{
+ netif_stop_queue(netdev);
+ return 0;
+}
+
+static void internal_dev_getinfo(struct net_device *netdev,
+ struct ethtool_drvinfo *info)
+{
+ strlcpy(info->driver, "openvswitch", sizeof(info->driver));
+}
+
+static const struct ethtool_ops internal_dev_ethtool_ops = {
+ .get_drvinfo = internal_dev_getinfo,
+ .get_link = ethtool_op_get_link,
+};
+
+static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
+{
+ if (new_mtu < 68)
+ return -EINVAL;
+
+ netdev->mtu = new_mtu;
+ return 0;
+}
+
+static void internal_dev_destructor(struct net_device *dev)
+{
+ struct vport *vport = ovs_internal_dev_get_vport(dev);
+
+ ovs_vport_free(vport);
+ free_netdev(dev);
+}
+
+static struct rtnl_link_stats64 *
+internal_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats)
+{
+ int i;
+
+ memset(stats, 0, sizeof(*stats));
+ stats->rx_errors = dev->stats.rx_errors;
+ stats->tx_errors = dev->stats.tx_errors;
+ stats->tx_dropped = dev->stats.tx_dropped;
+ stats->rx_dropped = dev->stats.rx_dropped;
+
+ for_each_possible_cpu(i) {
+ const struct pcpu_sw_netstats *percpu_stats;
+ struct pcpu_sw_netstats local_stats;
+ unsigned int start;
+
+ percpu_stats = per_cpu_ptr(dev->tstats, i);
+
+ do {
+ start = u64_stats_fetch_begin_irq(&percpu_stats->syncp);
+ local_stats = *percpu_stats;
+ } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start));
+
+ stats->rx_bytes += local_stats.rx_bytes;
+ stats->rx_packets += local_stats.rx_packets;
+ stats->tx_bytes += local_stats.tx_bytes;
+ stats->tx_packets += local_stats.tx_packets;
+ }
+
+ return stats;
+}
+
+static const struct net_device_ops internal_dev_netdev_ops = {
+ .ndo_open = internal_dev_open,
+ .ndo_stop = internal_dev_stop,
+ .ndo_start_xmit = internal_dev_xmit,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_change_mtu = internal_dev_change_mtu,
+ .ndo_get_stats64 = internal_get_stats,
+};
+
+static struct rtnl_link_ops internal_dev_link_ops __read_mostly = {
+ .kind = "openvswitch",
+};
+
+static void do_setup(struct net_device *netdev)
+{
+ ether_setup(netdev);
+
+ netdev->netdev_ops = &internal_dev_netdev_ops;
+
+ netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
+ netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_OPENVSWITCH;
+ netdev->destructor = internal_dev_destructor;
+ netdev->ethtool_ops = &internal_dev_ethtool_ops;
+ netdev->rtnl_link_ops = &internal_dev_link_ops;
+ netdev->tx_queue_len = 0;
+
+ netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
+ NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
+ NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL;
+
+ netdev->vlan_features = netdev->features;
+ netdev->hw_enc_features = netdev->features;
+ netdev->features |= NETIF_F_HW_VLAN_CTAG_TX;
+ netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
+
+ eth_hw_addr_random(netdev);
+}
+
+static struct vport *internal_dev_create(const struct vport_parms *parms)
+{
+ struct vport *vport;
+ struct internal_dev *internal_dev;
+ int err;
+
+ vport = ovs_vport_alloc(0, &ovs_internal_vport_ops, parms);
+ if (IS_ERR(vport)) {
+ err = PTR_ERR(vport);
+ goto error;
+ }
+
+ vport->dev = alloc_netdev(sizeof(struct internal_dev),
+ parms->name, NET_NAME_UNKNOWN, do_setup);
+ if (!vport->dev) {
+ err = -ENOMEM;
+ goto error_free_vport;
+ }
+ vport->dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
+ if (!vport->dev->tstats) {
+ err = -ENOMEM;
+ goto error_free_netdev;
+ }
+
+ dev_net_set(vport->dev, ovs_dp_get_net(vport->dp));
+ internal_dev = internal_dev_priv(vport->dev);
+ internal_dev->vport = vport;
+
+ /* Restrict bridge port to current netns. */
+ if (vport->port_no == OVSP_LOCAL)
+ vport->dev->features |= NETIF_F_NETNS_LOCAL;
+
+ rtnl_lock();
+ err = register_netdevice(vport->dev);
+ if (err)
+ goto error_unlock;
+
+ dev_set_promiscuity(vport->dev, 1);
+ rtnl_unlock();
+ netif_start_queue(vport->dev);
+
+ return vport;
+
+error_unlock:
+ rtnl_unlock();
+ free_percpu(vport->dev->tstats);
+error_free_netdev:
+ free_netdev(vport->dev);
+error_free_vport:
+ ovs_vport_free(vport);
+error:
+ return ERR_PTR(err);
+}
+
+static void internal_dev_destroy(struct vport *vport)
+{
+ netif_stop_queue(vport->dev);
+ rtnl_lock();
+ dev_set_promiscuity(vport->dev, -1);
+
+ /* unregister_netdevice() waits for an RCU grace period. */
+ unregister_netdevice(vport->dev);
+ free_percpu(vport->dev->tstats);
+ rtnl_unlock();
+}
+
+static netdev_tx_t internal_dev_recv(struct sk_buff *skb)
+{
+ struct net_device *netdev = skb->dev;
+ struct pcpu_sw_netstats *stats;
+
+ if (unlikely(!(netdev->flags & IFF_UP))) {
+ kfree_skb(skb);
+ netdev->stats.rx_dropped++;
+ return NETDEV_TX_OK;
+ }
+
+ skb_dst_drop(skb);
+ nf_reset(skb);
+ secpath_reset(skb);
+
+ skb->pkt_type = PACKET_HOST;
+ skb->protocol = eth_type_trans(skb, netdev);
+ skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
+
+ stats = this_cpu_ptr(netdev->tstats);
+ u64_stats_update_begin(&stats->syncp);
+ stats->rx_packets++;
+ stats->rx_bytes += skb->len;
+ u64_stats_update_end(&stats->syncp);
+
+ netif_rx(skb);
+ return NETDEV_TX_OK;
+}
+
+static struct vport_ops ovs_internal_vport_ops = {
+ .type = OVS_VPORT_TYPE_INTERNAL,
+ .create = internal_dev_create,
+ .destroy = internal_dev_destroy,
+ .send = internal_dev_recv,
+};
+
+int ovs_is_internal_dev(const struct net_device *netdev)
+{
+ return netdev->netdev_ops == &internal_dev_netdev_ops;
+}
+
+struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
+{
+ if (!ovs_is_internal_dev(netdev))
+ return NULL;
+
+ return internal_dev_priv(netdev)->vport;
+}
+
+int ovs_internal_dev_rtnl_link_register(void)
+{
+ int err;
+
+ err = rtnl_link_register(&internal_dev_link_ops);
+ if (err < 0)
+ return err;
+
+ err = ovs_vport_ops_register(&ovs_internal_vport_ops);
+ if (err < 0)
+ rtnl_link_unregister(&internal_dev_link_ops);
+
+ return err;
+}
+
+void ovs_internal_dev_rtnl_link_unregister(void)
+{
+ ovs_vport_ops_unregister(&ovs_internal_vport_ops);
+ rtnl_link_unregister(&internal_dev_link_ops);
+}
diff --git a/net/openvswitch/vport-internal_dev.h b/net/openvswitch/vport-internal_dev.h
new file mode 100644
index 0000000..1b179a1
--- /dev/null
+++ b/net/openvswitch/vport-internal_dev.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2007-2011 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifndef VPORT_INTERNAL_DEV_H
+#define VPORT_INTERNAL_DEV_H 1
+
+#include "datapath.h"
+#include "vport.h"
+
+int ovs_is_internal_dev(const struct net_device *);
+struct vport *ovs_internal_dev_get_vport(struct net_device *);
+int ovs_internal_dev_rtnl_link_register(void);
+void ovs_internal_dev_rtnl_link_unregister(void);
+
+#endif /* vport-internal_dev.h */
diff --git a/net/openvswitch/vport-netdev.c b/net/openvswitch/vport-netdev.c
new file mode 100644
index 0000000..76fcaf1
--- /dev/null
+++ b/net/openvswitch/vport-netdev.c
@@ -0,0 +1,222 @@
+/*
+ * Copyright (c) 2007-2012 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/if_arp.h>
+#include <linux/if_bridge.h>
+#include <linux/if_vlan.h>
+#include <linux/kernel.h>
+#include <linux/llc.h>
+#include <linux/rtnetlink.h>
+#include <linux/skbuff.h>
+#include <linux/openvswitch.h>
+#include <linux/export.h>
+
+#include <net/ip_tunnels.h>
+#include <net/rtnetlink.h>
+
+#include "datapath.h"
+#include "vport.h"
+#include "vport-internal_dev.h"
+#include "vport-netdev.h"
+
+static struct vport_ops ovs_netdev_vport_ops;
+
+/* Must be called with rcu_read_lock. */
+static void netdev_port_receive(struct sk_buff *skb)
+{
+ struct vport *vport;
+
+ vport = ovs_netdev_get_vport(skb->dev);
+ if (unlikely(!vport))
+ goto error;
+
+ if (unlikely(skb_warn_if_lro(skb)))
+ goto error;
+
+ /* Make our own copy of the packet. Otherwise we will mangle the
+ * packet for anyone who came before us (e.g. tcpdump via AF_PACKET).
+ */
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (unlikely(!skb))
+ return;
+
+ skb_push(skb, ETH_HLEN);
+ skb_postpush_rcsum(skb, skb->data, ETH_HLEN);
+ ovs_vport_receive(vport, skb, skb_tunnel_info(skb));
+ return;
+error:
+ kfree_skb(skb);
+}
+
+/* Called with rcu_read_lock and bottom-halves disabled. */
+static rx_handler_result_t netdev_frame_hook(struct sk_buff **pskb)
+{
+ struct sk_buff *skb = *pskb;
+
+ if (unlikely(skb->pkt_type == PACKET_LOOPBACK))
+ return RX_HANDLER_PASS;
+
+ netdev_port_receive(skb);
+ return RX_HANDLER_CONSUMED;
+}
+
+static struct net_device *get_dpdev(const struct datapath *dp)
+{
+ struct vport *local;
+
+ local = ovs_vport_ovsl(dp, OVSP_LOCAL);
+ BUG_ON(!local);
+ return local->dev;
+}
+
+struct vport *ovs_netdev_link(struct vport *vport, const char *name)
+{
+ int err;
+
+ vport->dev = dev_get_by_name(ovs_dp_get_net(vport->dp), name);
+ if (!vport->dev) {
+ err = -ENODEV;
+ goto error_free_vport;
+ }
+
+ if (vport->dev->flags & IFF_LOOPBACK ||
+ vport->dev->type != ARPHRD_ETHER ||
+ ovs_is_internal_dev(vport->dev)) {
+ err = -EINVAL;
+ goto error_put;
+ }
+
+ rtnl_lock();
+ err = netdev_master_upper_dev_link(vport->dev,
+ get_dpdev(vport->dp));
+ if (err)
+ goto error_unlock;
+
+ err = netdev_rx_handler_register(vport->dev, netdev_frame_hook,
+ vport);
+ if (err)
+ goto error_master_upper_dev_unlink;
+
+ dev_disable_lro(vport->dev);
+ dev_set_promiscuity(vport->dev, 1);
+ vport->dev->priv_flags |= IFF_OVS_DATAPATH;
+ rtnl_unlock();
+
+ return vport;
+
+error_master_upper_dev_unlink:
+ netdev_upper_dev_unlink(vport->dev, get_dpdev(vport->dp));
+error_unlock:
+ rtnl_unlock();
+error_put:
+ dev_put(vport->dev);
+error_free_vport:
+ ovs_vport_free(vport);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(ovs_netdev_link);
+
+static struct vport *netdev_create(const struct vport_parms *parms)
+{
+ struct vport *vport;
+
+ vport = ovs_vport_alloc(0, &ovs_netdev_vport_ops, parms);
+ if (IS_ERR(vport))
+ return vport;
+
+ return ovs_netdev_link(vport, parms->name);
+}
+
+static void vport_netdev_free(struct rcu_head *rcu)
+{
+ struct vport *vport = container_of(rcu, struct vport, rcu);
+
+ if (vport->dev)
+ dev_put(vport->dev);
+ ovs_vport_free(vport);
+}
+
+void ovs_netdev_detach_dev(struct vport *vport)
+{
+ ASSERT_RTNL();
+ vport->dev->priv_flags &= ~IFF_OVS_DATAPATH;
+ netdev_rx_handler_unregister(vport->dev);
+ netdev_upper_dev_unlink(vport->dev,
+ netdev_master_upper_dev_get(vport->dev));
+ dev_set_promiscuity(vport->dev, -1);
+}
+EXPORT_SYMBOL_GPL(ovs_netdev_detach_dev);
+
+static void netdev_destroy(struct vport *vport)
+{
+ rtnl_lock();
+ if (vport->dev->priv_flags & IFF_OVS_DATAPATH)
+ ovs_netdev_detach_dev(vport);
+ rtnl_unlock();
+
+ call_rcu(&vport->rcu, vport_netdev_free);
+}
+
+void ovs_netdev_tunnel_destroy(struct vport *vport)
+{
+ rtnl_lock();
+ if (vport->dev->priv_flags & IFF_OVS_DATAPATH)
+ ovs_netdev_detach_dev(vport);
+
+ /* We can be invoked by both explicit vport deletion and
+ * underlying netdev deregistration; delete the link only
+ * if it's not already shutting down.
+ */
+ if (vport->dev->reg_state == NETREG_REGISTERED)
+ rtnl_delete_link(vport->dev);
+ dev_put(vport->dev);
+ vport->dev = NULL;
+ rtnl_unlock();
+
+ call_rcu(&vport->rcu, vport_netdev_free);
+}
+EXPORT_SYMBOL_GPL(ovs_netdev_tunnel_destroy);
+
+/* Returns null if this device is not attached to a datapath. */
+struct vport *ovs_netdev_get_vport(struct net_device *dev)
+{
+ if (likely(dev->priv_flags & IFF_OVS_DATAPATH))
+ return (struct vport *)
+ rcu_dereference_rtnl(dev->rx_handler_data);
+ else
+ return NULL;
+}
+
+static struct vport_ops ovs_netdev_vport_ops = {
+ .type = OVS_VPORT_TYPE_NETDEV,
+ .create = netdev_create,
+ .destroy = netdev_destroy,
+ .send = dev_queue_xmit,
+};
+
+int __init ovs_netdev_init(void)
+{
+ return ovs_vport_ops_register(&ovs_netdev_vport_ops);
+}
+
+void ovs_netdev_exit(void)
+{
+ ovs_vport_ops_unregister(&ovs_netdev_vport_ops);
+}
diff --git a/net/openvswitch/vport-netdev.h b/net/openvswitch/vport-netdev.h
new file mode 100644
index 0000000..19e29c1
--- /dev/null
+++ b/net/openvswitch/vport-netdev.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2007-2011 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifndef VPORT_NETDEV_H
+#define VPORT_NETDEV_H 1
+
+#include <linux/netdevice.h>
+#include <linux/rcupdate.h>
+
+#include "vport.h"
+
+struct vport *ovs_netdev_get_vport(struct net_device *dev);
+
+struct vport *ovs_netdev_link(struct vport *vport, const char *name);
+void ovs_netdev_detach_dev(struct vport *);
+
+int __init ovs_netdev_init(void);
+void ovs_netdev_exit(void);
+
+void ovs_netdev_tunnel_destroy(struct vport *vport);
+#endif /* vport_netdev.h */
diff --git a/net/openvswitch/vport-vxlan.c b/net/openvswitch/vport-vxlan.c
new file mode 100644
index 0000000..5eb7694
--- /dev/null
+++ b/net/openvswitch/vport-vxlan.c
@@ -0,0 +1,174 @@
+/*
+ * Copyright (c) 2014 Nicira, Inc.
+ * Copyright (c) 2013 Cisco Systems, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/openvswitch.h>
+#include <linux/module.h>
+#include <net/udp.h>
+#include <net/ip_tunnels.h>
+#include <net/rtnetlink.h>
+#include <net/vxlan.h>
+
+#include "datapath.h"
+#include "vport.h"
+#include "vport-netdev.h"
+
+static struct vport_ops ovs_vxlan_netdev_vport_ops;
+
+static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb)
+{
+ struct vxlan_dev *vxlan = netdev_priv(vport->dev);
+ __be16 dst_port = vxlan->cfg.dst_port;
+
+ if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port)))
+ return -EMSGSIZE;
+
+ if (vxlan->flags & VXLAN_F_GBP) {
+ struct nlattr *exts;
+
+ exts = nla_nest_start(skb, OVS_TUNNEL_ATTR_EXTENSION);
+ if (!exts)
+ return -EMSGSIZE;
+
+ if (vxlan->flags & VXLAN_F_GBP &&
+ nla_put_flag(skb, OVS_VXLAN_EXT_GBP))
+ return -EMSGSIZE;
+
+ nla_nest_end(skb, exts);
+ }
+
+ return 0;
+}
+
+static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = {
+ [OVS_VXLAN_EXT_GBP] = { .type = NLA_FLAG, },
+};
+
+static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr,
+ struct vxlan_config *conf)
+{
+ struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1];
+ int err;
+
+ if (nla_len(attr) < sizeof(struct nlattr))
+ return -EINVAL;
+
+ err = nla_parse_nested(exts, OVS_VXLAN_EXT_MAX, attr, exts_policy);
+ if (err < 0)
+ return err;
+
+ if (exts[OVS_VXLAN_EXT_GBP])
+ conf->flags |= VXLAN_F_GBP;
+
+ return 0;
+}
+
+static struct vport *vxlan_tnl_create(const struct vport_parms *parms)
+{
+ struct net *net = ovs_dp_get_net(parms->dp);
+ struct nlattr *options = parms->options;
+ struct net_device *dev;
+ struct vport *vport;
+ struct nlattr *a;
+ int err;
+ struct vxlan_config conf = {
+ .no_share = true,
+ .flags = VXLAN_F_COLLECT_METADATA | VXLAN_F_UDP_ZERO_CSUM6_RX,
+ /* Don't restrict the packets that can be sent by MTU */
+ .mtu = IP_MAX_MTU,
+ };
+
+ if (!options) {
+ err = -EINVAL;
+ goto error;
+ }
+
+ a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
+ if (a && nla_len(a) == sizeof(u16)) {
+ conf.dst_port = htons(nla_get_u16(a));
+ } else {
+ /* Require destination port from userspace. */
+ err = -EINVAL;
+ goto error;
+ }
+
+ vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms);
+ if (IS_ERR(vport))
+ return vport;
+
+ a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION);
+ if (a) {
+ err = vxlan_configure_exts(vport, a, &conf);
+ if (err) {
+ ovs_vport_free(vport);
+ goto error;
+ }
+ }
+
+ rtnl_lock();
+ dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf);
+ if (IS_ERR(dev)) {
+ rtnl_unlock();
+ ovs_vport_free(vport);
+ return ERR_CAST(dev);
+ }
+
+ dev_change_flags(dev, dev->flags | IFF_UP);
+ rtnl_unlock();
+ return vport;
+error:
+ return ERR_PTR(err);
+}
+
+static struct vport *vxlan_create(const struct vport_parms *parms)
+{
+ struct vport *vport;
+
+ vport = vxlan_tnl_create(parms);
+ if (IS_ERR(vport))
+ return vport;
+
+ return ovs_netdev_link(vport, parms->name);
+}
+
+static struct vport_ops ovs_vxlan_netdev_vport_ops = {
+ .type = OVS_VPORT_TYPE_VXLAN,
+ .create = vxlan_create,
+ .destroy = ovs_netdev_tunnel_destroy,
+ .get_options = vxlan_get_options,
+ .send = dev_queue_xmit,
+};
+
+static int __init ovs_vxlan_tnl_init(void)
+{
+ return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops);
+}
+
+static void __exit ovs_vxlan_tnl_exit(void)
+{
+ ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops);
+}
+
+module_init(ovs_vxlan_tnl_init);
+module_exit(ovs_vxlan_tnl_exit);
+
+MODULE_DESCRIPTION("OVS: VXLAN switching port");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("vport-type-4");
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
new file mode 100644
index 0000000..31cbc8c
--- /dev/null
+++ b/net/openvswitch/vport.c
@@ -0,0 +1,511 @@
+/*
+ * Copyright (c) 2007-2014 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/if.h>
+#include <linux/if_vlan.h>
+#include <linux/jhash.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/percpu.h>
+#include <linux/rcupdate.h>
+#include <linux/rtnetlink.h>
+#include <linux/compat.h>
+#include <net/net_namespace.h>
+#include <linux/module.h>
+
+#include "datapath.h"
+#include "vport.h"
+#include "vport-internal_dev.h"
+
+static LIST_HEAD(vport_ops_list);
+
+/* Protected by RCU read lock for reading, ovs_mutex for writing. */
+static struct hlist_head *dev_table;
+#define VPORT_HASH_BUCKETS 1024
+
+/**
+ * ovs_vport_init - initialize vport subsystem
+ *
+ * Called at module load time to initialize the vport subsystem.
+ */
+int ovs_vport_init(void)
+{
+ dev_table = kzalloc(VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
+ GFP_KERNEL);
+ if (!dev_table)
+ return -ENOMEM;
+
+ return 0;
+}
+
+/**
+ * ovs_vport_exit - shutdown vport subsystem
+ *
+ * Called at module exit time to shutdown the vport subsystem.
+ */
+void ovs_vport_exit(void)
+{
+ kfree(dev_table);
+}
+
+static struct hlist_head *hash_bucket(const struct net *net, const char *name)
+{
+ unsigned int hash = jhash(name, strlen(name), (unsigned long) net);
+ return &dev_table[hash & (VPORT_HASH_BUCKETS - 1)];
+}
+
+int __ovs_vport_ops_register(struct vport_ops *ops)
+{
+ int err = -EEXIST;
+ struct vport_ops *o;
+
+ ovs_lock();
+ list_for_each_entry(o, &vport_ops_list, list)
+ if (ops->type == o->type)
+ goto errout;
+
+ list_add_tail(&ops->list, &vport_ops_list);
+ err = 0;
+errout:
+ ovs_unlock();
+ return err;
+}
+EXPORT_SYMBOL_GPL(__ovs_vport_ops_register);
+
+void ovs_vport_ops_unregister(struct vport_ops *ops)
+{
+ ovs_lock();
+ list_del(&ops->list);
+ ovs_unlock();
+}
+EXPORT_SYMBOL_GPL(ovs_vport_ops_unregister);
+
+/**
+ * ovs_vport_locate - find a port that has already been created
+ *
+ * @name: name of port to find
+ *
+ * Must be called with ovs or RCU read lock.
+ */
+struct vport *ovs_vport_locate(const struct net *net, const char *name)
+{
+ struct hlist_head *bucket = hash_bucket(net, name);
+ struct vport *vport;
+
+ hlist_for_each_entry_rcu(vport, bucket, hash_node)
+ if (!strcmp(name, ovs_vport_name(vport)) &&
+ net_eq(ovs_dp_get_net(vport->dp), net))
+ return vport;
+
+ return NULL;
+}
+
+/**
+ * ovs_vport_alloc - allocate and initialize new vport
+ *
+ * @priv_size: Size of private data area to allocate.
+ * @ops: vport device ops
+ *
+ * Allocate and initialize a new vport defined by @ops. The vport will contain
+ * a private data area of size @priv_size that can be accessed using
+ * vport_priv(). vports that are no longer needed should be released with
+ * vport_free().
+ */
+struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops,
+ const struct vport_parms *parms)
+{
+ struct vport *vport;
+ size_t alloc_size;
+
+ alloc_size = sizeof(struct vport);
+ if (priv_size) {
+ alloc_size = ALIGN(alloc_size, VPORT_ALIGN);
+ alloc_size += priv_size;
+ }
+
+ vport = kzalloc(alloc_size, GFP_KERNEL);
+ if (!vport)
+ return ERR_PTR(-ENOMEM);
+
+ vport->dp = parms->dp;
+ vport->port_no = parms->port_no;
+ vport->ops = ops;
+ INIT_HLIST_NODE(&vport->dp_hash_node);
+
+ if (ovs_vport_set_upcall_portids(vport, parms->upcall_portids)) {
+ kfree(vport);
+ return ERR_PTR(-EINVAL);
+ }
+
+ return vport;
+}
+EXPORT_SYMBOL_GPL(ovs_vport_alloc);
+
+/**
+ * ovs_vport_free - uninitialize and free vport
+ *
+ * @vport: vport to free
+ *
+ * Frees a vport allocated with vport_alloc() when it is no longer needed.
+ *
+ * The caller must ensure that an RCU grace period has passed since the last
+ * time @vport was in a datapath.
+ */
+void ovs_vport_free(struct vport *vport)
+{
+ /* vport is freed from RCU callback or error path, Therefore
+ * it is safe to use raw dereference.
+ */
+ kfree(rcu_dereference_raw(vport->upcall_portids));
+ kfree(vport);
+}
+EXPORT_SYMBOL_GPL(ovs_vport_free);
+
+static struct vport_ops *ovs_vport_lookup(const struct vport_parms *parms)
+{
+ struct vport_ops *ops;
+
+ list_for_each_entry(ops, &vport_ops_list, list)
+ if (ops->type == parms->type)
+ return ops;
+
+ return NULL;
+}
+
+/**
+ * ovs_vport_add - add vport device (for kernel callers)
+ *
+ * @parms: Information about new vport.
+ *
+ * Creates a new vport with the specified configuration (which is dependent on
+ * device type). ovs_mutex must be held.
+ */
+struct vport *ovs_vport_add(const struct vport_parms *parms)
+{
+ struct vport_ops *ops;
+ struct vport *vport;
+
+ ops = ovs_vport_lookup(parms);
+ if (ops) {
+ struct hlist_head *bucket;
+
+ if (!try_module_get(ops->owner))
+ return ERR_PTR(-EAFNOSUPPORT);
+
+ vport = ops->create(parms);
+ if (IS_ERR(vport)) {
+ module_put(ops->owner);
+ return vport;
+ }
+
+ bucket = hash_bucket(ovs_dp_get_net(vport->dp),
+ ovs_vport_name(vport));
+ hlist_add_head_rcu(&vport->hash_node, bucket);
+ return vport;
+ }
+
+ /* Unlock to attempt module load and return -EAGAIN if load
+ * was successful as we need to restart the port addition
+ * workflow.
+ */
+ ovs_unlock();
+ request_module("vport-type-%d", parms->type);
+ ovs_lock();
+
+ if (!ovs_vport_lookup(parms))
+ return ERR_PTR(-EAFNOSUPPORT);
+ else
+ return ERR_PTR(-EAGAIN);
+}
+
+/**
+ * ovs_vport_set_options - modify existing vport device (for kernel callers)
+ *
+ * @vport: vport to modify.
+ * @options: New configuration.
+ *
+ * Modifies an existing device with the specified configuration (which is
+ * dependent on device type). ovs_mutex must be held.
+ */
+int ovs_vport_set_options(struct vport *vport, struct nlattr *options)
+{
+ if (!vport->ops->set_options)
+ return -EOPNOTSUPP;
+ return vport->ops->set_options(vport, options);
+}
+
+/**
+ * ovs_vport_del - delete existing vport device
+ *
+ * @vport: vport to delete.
+ *
+ * Detaches @vport from its datapath and destroys it. ovs_mutex must
+ * be held.
+ */
+void ovs_vport_del(struct vport *vport)
+{
+ ASSERT_OVSL();
+
+ hlist_del_rcu(&vport->hash_node);
+ module_put(vport->ops->owner);
+ vport->ops->destroy(vport);
+}
+
+/**
+ * ovs_vport_get_stats - retrieve device stats
+ *
+ * @vport: vport from which to retrieve the stats
+ * @stats: location to store stats
+ *
+ * Retrieves transmit, receive, and error stats for the given device.
+ *
+ * Must be called with ovs_mutex or rcu_read_lock.
+ */
+void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats)
+{
+ const struct rtnl_link_stats64 *dev_stats;
+ struct rtnl_link_stats64 temp;
+
+ dev_stats = dev_get_stats(vport->dev, &temp);
+ stats->rx_errors = dev_stats->rx_errors;
+ stats->tx_errors = dev_stats->tx_errors;
+ stats->tx_dropped = dev_stats->tx_dropped;
+ stats->rx_dropped = dev_stats->rx_dropped;
+
+ stats->rx_bytes = dev_stats->rx_bytes;
+ stats->rx_packets = dev_stats->rx_packets;
+ stats->tx_bytes = dev_stats->tx_bytes;
+ stats->tx_packets = dev_stats->tx_packets;
+}
+
+/**
+ * ovs_vport_get_options - retrieve device options
+ *
+ * @vport: vport from which to retrieve the options.
+ * @skb: sk_buff where options should be appended.
+ *
+ * Retrieves the configuration of the given device, appending an
+ * %OVS_VPORT_ATTR_OPTIONS attribute that in turn contains nested
+ * vport-specific attributes to @skb.
+ *
+ * Returns 0 if successful, -EMSGSIZE if @skb has insufficient room, or another
+ * negative error code if a real error occurred. If an error occurs, @skb is
+ * left unmodified.
+ *
+ * Must be called with ovs_mutex or rcu_read_lock.
+ */
+int ovs_vport_get_options(const struct vport *vport, struct sk_buff *skb)
+{
+ struct nlattr *nla;
+ int err;
+
+ if (!vport->ops->get_options)
+ return 0;
+
+ nla = nla_nest_start(skb, OVS_VPORT_ATTR_OPTIONS);
+ if (!nla)
+ return -EMSGSIZE;
+
+ err = vport->ops->get_options(vport, skb);
+ if (err) {
+ nla_nest_cancel(skb, nla);
+ return err;
+ }
+
+ nla_nest_end(skb, nla);
+ return 0;
+}
+
+/**
+ * ovs_vport_set_upcall_portids - set upcall portids of @vport.
+ *
+ * @vport: vport to modify.
+ * @ids: new configuration, an array of port ids.
+ *
+ * Sets the vport's upcall_portids to @ids.
+ *
+ * Returns 0 if successful, -EINVAL if @ids is zero length or cannot be parsed
+ * as an array of U32.
+ *
+ * Must be called with ovs_mutex.
+ */
+int ovs_vport_set_upcall_portids(struct vport *vport, const struct nlattr *ids)
+{
+ struct vport_portids *old, *vport_portids;
+
+ if (!nla_len(ids) || nla_len(ids) % sizeof(u32))
+ return -EINVAL;
+
+ old = ovsl_dereference(vport->upcall_portids);
+
+ vport_portids = kmalloc(sizeof(*vport_portids) + nla_len(ids),
+ GFP_KERNEL);
+ if (!vport_portids)
+ return -ENOMEM;
+
+ vport_portids->n_ids = nla_len(ids) / sizeof(u32);
+ vport_portids->rn_ids = reciprocal_value(vport_portids->n_ids);
+ nla_memcpy(vport_portids->ids, ids, nla_len(ids));
+
+ rcu_assign_pointer(vport->upcall_portids, vport_portids);
+
+ if (old)
+ kfree_rcu(old, rcu);
+ return 0;
+}
+
+/**
+ * ovs_vport_get_upcall_portids - get the upcall_portids of @vport.
+ *
+ * @vport: vport from which to retrieve the portids.
+ * @skb: sk_buff where portids should be appended.
+ *
+ * Retrieves the configuration of the given vport, appending the
+ * %OVS_VPORT_ATTR_UPCALL_PID attribute which is the array of upcall
+ * portids to @skb.
+ *
+ * Returns 0 if successful, -EMSGSIZE if @skb has insufficient room.
+ * If an error occurs, @skb is left unmodified. Must be called with
+ * ovs_mutex or rcu_read_lock.
+ */
+int ovs_vport_get_upcall_portids(const struct vport *vport,
+ struct sk_buff *skb)
+{
+ struct vport_portids *ids;
+
+ ids = rcu_dereference_ovsl(vport->upcall_portids);
+
+ if (vport->dp->user_features & OVS_DP_F_VPORT_PIDS)
+ return nla_put(skb, OVS_VPORT_ATTR_UPCALL_PID,
+ ids->n_ids * sizeof(u32), (void *)ids->ids);
+ else
+ return nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, ids->ids[0]);
+}
+
+/**
+ * ovs_vport_find_upcall_portid - find the upcall portid to send upcall.
+ *
+ * @vport: vport from which the missed packet is received.
+ * @skb: skb that the missed packet was received.
+ *
+ * Uses the skb_get_hash() to select the upcall portid to send the
+ * upcall.
+ *
+ * Returns the portid of the target socket. Must be called with rcu_read_lock.
+ */
+u32 ovs_vport_find_upcall_portid(const struct vport *vport, struct sk_buff *skb)
+{
+ struct vport_portids *ids;
+ u32 ids_index;
+ u32 hash;
+
+ ids = rcu_dereference(vport->upcall_portids);
+
+ if (ids->n_ids == 1 && ids->ids[0] == 0)
+ return 0;
+
+ hash = skb_get_hash(skb);
+ ids_index = hash - ids->n_ids * reciprocal_divide(hash, ids->rn_ids);
+ return ids->ids[ids_index];
+}
+
+/**
+ * ovs_vport_receive - pass up received packet to the datapath for processing
+ *
+ * @vport: vport that received the packet
+ * @skb: skb that was received
+ * @tun_key: tunnel (if any) that carried packet
+ *
+ * Must be called with rcu_read_lock. The packet cannot be shared and
+ * skb->data should point to the Ethernet header.
+ */
+int ovs_vport_receive(struct vport *vport, struct sk_buff *skb,
+ const struct ip_tunnel_info *tun_info)
+{
+ struct sw_flow_key key;
+ int error;
+
+ OVS_CB(skb)->input_vport = vport;
+ OVS_CB(skb)->mru = 0;
+ if (unlikely(dev_net(skb->dev) != ovs_dp_get_net(vport->dp))) {
+ u32 mark;
+
+ mark = skb->mark;
+ skb_scrub_packet(skb, true);
+ skb->mark = mark;
+ tun_info = NULL;
+ }
+
+ /* Extract flow from 'skb' into 'key'. */
+ error = ovs_flow_key_extract(tun_info, skb, &key);
+ if (unlikely(error)) {
+ kfree_skb(skb);
+ return error;
+ }
+ ovs_dp_process_packet(skb, &key);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ovs_vport_receive);
+
+static void free_vport_rcu(struct rcu_head *rcu)
+{
+ struct vport *vport = container_of(rcu, struct vport, rcu);
+
+ ovs_vport_free(vport);
+}
+
+void ovs_vport_deferred_free(struct vport *vport)
+{
+ if (!vport)
+ return;
+
+ call_rcu(&vport->rcu, free_vport_rcu);
+}
+EXPORT_SYMBOL_GPL(ovs_vport_deferred_free);
+
+static unsigned int packet_length(const struct sk_buff *skb)
+{
+ unsigned int length = skb->len - ETH_HLEN;
+
+ if (skb->protocol == htons(ETH_P_8021Q))
+ length -= VLAN_HLEN;
+
+ return length;
+}
+
+void ovs_vport_send(struct vport *vport, struct sk_buff *skb)
+{
+ int mtu = vport->dev->mtu;
+
+ if (unlikely(packet_length(skb) > mtu && !skb_is_gso(skb))) {
+ net_warn_ratelimited("%s: dropped over-mtu packet: %d > %d\n",
+ vport->dev->name,
+ packet_length(skb), mtu);
+ vport->dev->stats.tx_errors++;
+ goto drop;
+ }
+
+ skb->dev = vport->dev;
+ vport->ops->send(skb);
+ return;
+
+drop:
+ kfree_skb(skb);
+}
diff --git a/net/openvswitch/vport.h b/net/openvswitch/vport.h
new file mode 100644
index 0000000..6e2b62f
--- /dev/null
+++ b/net/openvswitch/vport.h
@@ -0,0 +1,222 @@
+/*
+ * Copyright (c) 2007-2012 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifndef VPORT_H
+#define VPORT_H 1
+
+#include <linux/if_tunnel.h>
+#include <linux/list.h>
+#include <linux/netlink.h>
+#include <linux/openvswitch.h>
+#include <linux/reciprocal_div.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/u64_stats_sync.h>
+
+#include "datapath.h"
+
+struct vport;
+struct vport_parms;
+
+/* The following definitions are for users of the vport subsytem: */
+
+int ovs_vport_init(void);
+void ovs_vport_exit(void);
+
+struct vport *ovs_vport_add(const struct vport_parms *);
+void ovs_vport_del(struct vport *);
+
+struct vport *ovs_vport_locate(const struct net *net, const char *name);
+
+void ovs_vport_get_stats(struct vport *, struct ovs_vport_stats *);
+
+int ovs_vport_set_options(struct vport *, struct nlattr *options);
+int ovs_vport_get_options(const struct vport *, struct sk_buff *);
+
+int ovs_vport_set_upcall_portids(struct vport *, const struct nlattr *pids);
+int ovs_vport_get_upcall_portids(const struct vport *, struct sk_buff *);
+u32 ovs_vport_find_upcall_portid(const struct vport *, struct sk_buff *);
+
+/**
+ * struct vport_portids - array of netlink portids of a vport.
+ * must be protected by rcu.
+ * @rn_ids: The reciprocal value of @n_ids.
+ * @rcu: RCU callback head for deferred destruction.
+ * @n_ids: Size of @ids array.
+ * @ids: Array storing the Netlink socket pids to be used for packets received
+ * on this port that miss the flow table.
+ */
+struct vport_portids {
+ struct reciprocal_value rn_ids;
+ struct rcu_head rcu;
+ u32 n_ids;
+ u32 ids[];
+};
+
+/**
+ * struct vport - one port within a datapath
+ * @rcu: RCU callback head for deferred destruction.
+ * @dp: Datapath to which this port belongs.
+ * @upcall_portids: RCU protected 'struct vport_portids'.
+ * @port_no: Index into @dp's @ports array.
+ * @hash_node: Element in @dev_table hash table in vport.c.
+ * @dp_hash_node: Element in @datapath->ports hash table in datapath.c.
+ * @ops: Class structure.
+ * @detach_list: list used for detaching vport in net-exit call.
+ */
+struct vport {
+ struct net_device *dev;
+ struct datapath *dp;
+ struct vport_portids __rcu *upcall_portids;
+ u16 port_no;
+
+ struct hlist_node hash_node;
+ struct hlist_node dp_hash_node;
+ const struct vport_ops *ops;
+
+ struct list_head detach_list;
+ struct rcu_head rcu;
+};
+
+/**
+ * struct vport_parms - parameters for creating a new vport
+ *
+ * @name: New vport's name.
+ * @type: New vport's type.
+ * @options: %OVS_VPORT_ATTR_OPTIONS attribute from Netlink message, %NULL if
+ * none was supplied.
+ * @dp: New vport's datapath.
+ * @port_no: New vport's port number.
+ */
+struct vport_parms {
+ const char *name;
+ enum ovs_vport_type type;
+ struct nlattr *options;
+
+ /* For ovs_vport_alloc(). */
+ struct datapath *dp;
+ u16 port_no;
+ struct nlattr *upcall_portids;
+};
+
+/**
+ * struct vport_ops - definition of a type of virtual port
+ *
+ * @type: %OVS_VPORT_TYPE_* value for this type of virtual port.
+ * @create: Create a new vport configured as specified. On success returns
+ * a new vport allocated with ovs_vport_alloc(), otherwise an ERR_PTR() value.
+ * @destroy: Destroys a vport. Must call vport_free() on the vport but not
+ * before an RCU grace period has elapsed.
+ * @set_options: Modify the configuration of an existing vport. May be %NULL
+ * if modification is not supported.
+ * @get_options: Appends vport-specific attributes for the configuration of an
+ * existing vport to a &struct sk_buff. May be %NULL for a vport that does not
+ * have any configuration.
+ * @send: Send a packet on the device.
+ * zero for dropped packets or negative for error.
+ */
+struct vport_ops {
+ enum ovs_vport_type type;
+
+ /* Called with ovs_mutex. */
+ struct vport *(*create)(const struct vport_parms *);
+ void (*destroy)(struct vport *);
+
+ int (*set_options)(struct vport *, struct nlattr *);
+ int (*get_options)(const struct vport *, struct sk_buff *);
+
+ netdev_tx_t (*send) (struct sk_buff *skb);
+ struct module *owner;
+ struct list_head list;
+};
+
+struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *,
+ const struct vport_parms *);
+void ovs_vport_free(struct vport *);
+void ovs_vport_deferred_free(struct vport *vport);
+
+#define VPORT_ALIGN 8
+
+/**
+ * vport_priv - access private data area of vport
+ *
+ * @vport: vport to access
+ *
+ * If a nonzero size was passed in priv_size of vport_alloc() a private data
+ * area was allocated on creation. This allows that area to be accessed and
+ * used for any purpose needed by the vport implementer.
+ */
+static inline void *vport_priv(const struct vport *vport)
+{
+ return (u8 *)(uintptr_t)vport + ALIGN(sizeof(struct vport), VPORT_ALIGN);
+}
+
+/**
+ * vport_from_priv - lookup vport from private data pointer
+ *
+ * @priv: Start of private data area.
+ *
+ * It is sometimes useful to translate from a pointer to the private data
+ * area to the vport, such as in the case where the private data pointer is
+ * the result of a hash table lookup. @priv must point to the start of the
+ * private data area.
+ */
+static inline struct vport *vport_from_priv(void *priv)
+{
+ return (struct vport *)((u8 *)priv - ALIGN(sizeof(struct vport), VPORT_ALIGN));
+}
+
+int ovs_vport_receive(struct vport *, struct sk_buff *,
+ const struct ip_tunnel_info *);
+
+static inline const char *ovs_vport_name(struct vport *vport)
+{
+ return vport->dev->name;
+}
+
+int __ovs_vport_ops_register(struct vport_ops *ops);
+#define ovs_vport_ops_register(ops) \
+ ({ \
+ (ops)->owner = THIS_MODULE; \
+ __ovs_vport_ops_register(ops); \
+ })
+
+void ovs_vport_ops_unregister(struct vport_ops *ops);
+
+static inline struct rtable *ovs_tunnel_route_lookup(struct net *net,
+ const struct ip_tunnel_key *key,
+ u32 mark,
+ struct flowi4 *fl,
+ u8 protocol)
+{
+ struct rtable *rt;
+
+ memset(fl, 0, sizeof(*fl));
+ fl->daddr = key->u.ipv4.dst;
+ fl->saddr = key->u.ipv4.src;
+ fl->flowi4_tos = RT_TOS(key->tos);
+ fl->flowi4_mark = mark;
+ fl->flowi4_proto = protocol;
+
+ rt = ip_route_output_key(net, fl);
+ return rt;
+}
+
+void ovs_vport_send(struct vport *vport, struct sk_buff *skb);
+
+#endif /* vport.h */