vhost: Add multi-versioning support
It also refactors the vhost code which was in one big file vhost-user.c.
Receive side code is in vhost_user_input.c and
Transmit side code is in vhost_user_output.c
Change-Id: I1b539b5008685889723e228265786a2a3e9f3a78
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
diff --git a/src/vnet/devices/virtio/vhost-user.c b/src/vnet/devices/virtio/vhost-user.c
deleted file mode 100644
index f6406d4..0000000
--- a/src/vnet/devices/virtio/vhost-user.c
+++ /dev/null
@@ -1,3758 +0,0 @@
-/*
- *------------------------------------------------------------------
- * vhost.c - vhost-user
- *
- * Copyright (c) 2014 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *------------------------------------------------------------------
- */
-
-#include <fcntl.h> /* for open */
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/uio.h> /* for iovec */
-#include <netinet/in.h>
-#include <sys/vfs.h>
-
-#include <linux/if_arp.h>
-#include <linux/if_tun.h>
-
-#include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
-
-#include <vnet/ip/ip.h>
-
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/devices/devices.h>
-#include <vnet/feature/feature.h>
-
-#include <vnet/devices/virtio/vhost-user.h>
-
-/**
- * @file
- * @brief vHost User Device Driver.
- *
- * This file contains the source code for vHost User interface.
- */
-
-
-#define VHOST_DEBUG_VQ 0
-
-#define DBG_SOCK(args...) \
- { \
- vhost_user_main_t *_vum = &vhost_user_main; \
- if (_vum->debug) \
- clib_warning(args); \
- };
-
-#if VHOST_DEBUG_VQ == 1
-#define DBG_VQ(args...) clib_warning(args);
-#else
-#define DBG_VQ(args...)
-#endif
-
-/*
- * When an RX queue is down but active, received packets
- * must be discarded. This value controls up to how many
- * packets will be discarded during each round.
- */
-#define VHOST_USER_DOWN_DISCARD_COUNT 256
-
-/*
- * When the number of available buffers gets under this threshold,
- * RX node will start discarding packets.
- */
-#define VHOST_USER_RX_BUFFER_STARVATION 32
-
-/*
- * On the receive side, the host should free descriptors as soon
- * as possible in order to avoid TX drop in the VM.
- * This value controls the number of copy operations that are stacked
- * before copy is done for all and descriptors are given back to
- * the guest.
- * The value 64 was obtained by testing (48 and 128 were not as good).
- */
-#define VHOST_USER_RX_COPY_THRESHOLD 64
-/*
- * On the transmit side, we keep processing the buffers from vlib in the while
- * loop and prepare the copy order to be executed later. However, the static
- * array which we keep the copy order is limited to VHOST_USER_COPY_ARRAY_N
- * entries. In order to not corrupt memory, we have to do the copy when the
- * static array reaches the copy threshold. We subtract 40 in case the code
- * goes into the inner loop for a maximum of 64k frames which may require
- * more array entries.
- */
-#define VHOST_USER_TX_COPY_THRESHOLD (VHOST_USER_COPY_ARRAY_N - 40)
-
-#define UNIX_GET_FD(unixfd_idx) ({ \
- typeof(unixfd_idx) __unixfd_idx = (unixfd_idx); \
- (__unixfd_idx != ~0) ? \
- pool_elt_at_index (file_main.file_pool, \
- __unixfd_idx)->file_descriptor : -1; })
-
-#define foreach_virtio_trace_flags \
- _ (SIMPLE_CHAINED, 0, "Simple descriptor chaining") \
- _ (SINGLE_DESC, 1, "Single descriptor packet") \
- _ (INDIRECT, 2, "Indirect descriptor") \
- _ (MAP_ERROR, 4, "Memory mapping error")
-
-typedef enum
-{
-#define _(n,i,s) VIRTIO_TRACE_F_##n,
- foreach_virtio_trace_flags
-#undef _
-} virtio_trace_flag_t;
-
-vlib_node_registration_t vhost_user_input_node;
-
-#define foreach_vhost_user_tx_func_error \
- _(NONE, "no error") \
- _(NOT_READY, "vhost vring not ready") \
- _(DOWN, "vhost interface is down") \
- _(PKT_DROP_NOBUF, "tx packet drops (no available descriptors)") \
- _(PKT_DROP_NOMRG, "tx packet drops (cannot merge descriptors)") \
- _(MMAP_FAIL, "mmap failure") \
- _(INDIRECT_OVERFLOW, "indirect descriptor table overflow")
-
-typedef enum
-{
-#define _(f,s) VHOST_USER_TX_FUNC_ERROR_##f,
- foreach_vhost_user_tx_func_error
-#undef _
- VHOST_USER_TX_FUNC_N_ERROR,
-} vhost_user_tx_func_error_t;
-
-static char *vhost_user_tx_func_error_strings[] = {
-#define _(n,s) s,
- foreach_vhost_user_tx_func_error
-#undef _
-};
-
-#define foreach_vhost_user_input_func_error \
- _(NO_ERROR, "no error") \
- _(NO_BUFFER, "no available buffer") \
- _(MMAP_FAIL, "mmap failure") \
- _(INDIRECT_OVERFLOW, "indirect descriptor overflows table") \
- _(UNDERSIZED_FRAME, "undersized ethernet frame received (< 14 bytes)") \
- _(FULL_RX_QUEUE, "full rx queue (possible driver tx drop)")
-
-typedef enum
-{
-#define _(f,s) VHOST_USER_INPUT_FUNC_ERROR_##f,
- foreach_vhost_user_input_func_error
-#undef _
- VHOST_USER_INPUT_FUNC_N_ERROR,
-} vhost_user_input_func_error_t;
-
-static char *vhost_user_input_func_error_strings[] = {
-#define _(n,s) s,
- foreach_vhost_user_input_func_error
-#undef _
-};
-
-/* *INDENT-OFF* */
-static vhost_user_main_t vhost_user_main = {
- .mtu_bytes = 1518,
-};
-
-VNET_HW_INTERFACE_CLASS (vhost_interface_class, static) = {
- .name = "vhost-user",
-};
-/* *INDENT-ON* */
-
-static u8 *
-format_vhost_user_interface_name (u8 * s, va_list * args)
-{
- u32 i = va_arg (*args, u32);
- u32 show_dev_instance = ~0;
- vhost_user_main_t *vum = &vhost_user_main;
-
- if (i < vec_len (vum->show_dev_instance_by_real_dev_instance))
- show_dev_instance = vum->show_dev_instance_by_real_dev_instance[i];
-
- if (show_dev_instance != ~0)
- i = show_dev_instance;
-
- s = format (s, "VirtualEthernet0/0/%d", i);
- return s;
-}
-
-static int
-vhost_user_name_renumber (vnet_hw_interface_t * hi, u32 new_dev_instance)
-{
- // FIXME: check if the new dev instance is already used
- vhost_user_main_t *vum = &vhost_user_main;
- vec_validate_init_empty (vum->show_dev_instance_by_real_dev_instance,
- hi->dev_instance, ~0);
-
- vum->show_dev_instance_by_real_dev_instance[hi->dev_instance] =
- new_dev_instance;
-
- DBG_SOCK ("renumbered vhost-user interface dev_instance %d to %d",
- hi->dev_instance, new_dev_instance);
-
- return 0;
-}
-
-static_always_inline void *
-map_guest_mem (vhost_user_intf_t * vui, uword addr, u32 * hint)
-{
- int i = *hint;
- if (PREDICT_TRUE ((vui->regions[i].guest_phys_addr <= addr) &&
- ((vui->regions[i].guest_phys_addr +
- vui->regions[i].memory_size) > addr)))
- {
- return (void *) (vui->region_mmap_addr[i] + addr -
- vui->regions[i].guest_phys_addr);
- }
-#if __SSE4_2__
- __m128i rl, rh, al, ah, r;
- al = _mm_set1_epi64x (addr + 1);
- ah = _mm_set1_epi64x (addr);
-
- rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[0]);
- rl = _mm_cmpgt_epi64 (al, rl);
- rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[0]);
- rh = _mm_cmpgt_epi64 (rh, ah);
- r = _mm_and_si128 (rl, rh);
-
- rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[2]);
- rl = _mm_cmpgt_epi64 (al, rl);
- rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[2]);
- rh = _mm_cmpgt_epi64 (rh, ah);
- r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x22);
-
- rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[4]);
- rl = _mm_cmpgt_epi64 (al, rl);
- rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[4]);
- rh = _mm_cmpgt_epi64 (rh, ah);
- r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x44);
-
- rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[6]);
- rl = _mm_cmpgt_epi64 (al, rl);
- rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[6]);
- rh = _mm_cmpgt_epi64 (rh, ah);
- r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x88);
-
- r = _mm_shuffle_epi8 (r, _mm_set_epi64x (0, 0x0e060c040a020800));
- i = count_trailing_zeros (_mm_movemask_epi8 (r) |
- (1 << VHOST_MEMORY_MAX_NREGIONS));
-
- if (i < vui->nregions)
- {
- *hint = i;
- return (void *) (vui->region_mmap_addr[i] + addr -
- vui->regions[i].guest_phys_addr);
- }
-#elif __aarch64__ && __ARM_NEON
- uint64x2_t al, ah, rl, rh, r;
- uint32_t u32 = 0;
-
- al = vdupq_n_u64 (addr + 1);
- ah = vdupq_n_u64 (addr);
-
- /*First Iteration */
- rl = vld1q_u64 (&vui->region_guest_addr_lo[0]);
- rl = vcgtq_u64 (al, rl);
- rh = vld1q_u64 (&vui->region_guest_addr_hi[0]);
- rh = vcgtq_u64 (rh, ah);
- r = vandq_u64 (rl, rh);
- u32 |= (vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 0) & 0x1);
- u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 8) & 0x1) << 1);
-
- if (u32)
- {
- i = count_trailing_zeros (u32);
- goto vhost_map_guest_mem_done;
- }
-
- /*Second Iteration */
- rl = vld1q_u64 (&vui->region_guest_addr_lo[2]);
- rl = vcgtq_u64 (al, rl);
- rh = vld1q_u64 (&vui->region_guest_addr_hi[2]);
- rh = vcgtq_u64 (rh, ah);
- r = vandq_u64 (rl, rh);
- u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 0) & 0x1) << 2);
- u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 8) & 0x1) << 3);
-
- if (u32)
- {
- i = count_trailing_zeros (u32);
- goto vhost_map_guest_mem_done;
- }
-
- /*Third Iteration */
- rl = vld1q_u64 (&vui->region_guest_addr_lo[4]);
- rl = vcgtq_u64 (al, rl);
- rh = vld1q_u64 (&vui->region_guest_addr_hi[4]);
- rh = vcgtq_u64 (rh, ah);
- r = vandq_u64 (rl, rh);
- u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 0) & 0x1) << 4);
- u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 8) & 0x1) << 5);
-
- if (u32)
- {
- i = count_trailing_zeros (u32);
- goto vhost_map_guest_mem_done;
- }
-
- /*Fourth Iteration */
- rl = vld1q_u64 (&vui->region_guest_addr_lo[6]);
- rl = vcgtq_u64 (al, rl);
- rh = vld1q_u64 (&vui->region_guest_addr_hi[6]);
- rh = vcgtq_u64 (rh, ah);
- r = vandq_u64 (rl, rh);
- u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 0) & 0x1) << 6);
- u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 8) & 0x1) << 7);
-
- i = count_trailing_zeros (u32 | (1 << VHOST_MEMORY_MAX_NREGIONS));
-
-vhost_map_guest_mem_done:
- if (i < vui->nregions)
- {
- *hint = i;
- return (void *) (vui->region_mmap_addr[i] + addr -
- vui->regions[i].guest_phys_addr);
- }
-#else
- for (i = 0; i < vui->nregions; i++)
- {
- if ((vui->regions[i].guest_phys_addr <= addr) &&
- ((vui->regions[i].guest_phys_addr + vui->regions[i].memory_size) >
- addr))
- {
- *hint = i;
- return (void *) (vui->region_mmap_addr[i] + addr -
- vui->regions[i].guest_phys_addr);
- }
- }
-#endif
- DBG_VQ ("failed to map guest mem addr %llx", addr);
- *hint = 0;
- return 0;
-}
-
-static inline void *
-map_user_mem (vhost_user_intf_t * vui, uword addr)
-{
- int i;
- for (i = 0; i < vui->nregions; i++)
- {
- if ((vui->regions[i].userspace_addr <= addr) &&
- ((vui->regions[i].userspace_addr + vui->regions[i].memory_size) >
- addr))
- {
- return (void *) (vui->region_mmap_addr[i] + addr -
- vui->regions[i].userspace_addr);
- }
- }
- return 0;
-}
-
-static long
-get_huge_page_size (int fd)
-{
- struct statfs s;
- fstatfs (fd, &s);
- return s.f_bsize;
-}
-
-static void
-unmap_all_mem_regions (vhost_user_intf_t * vui)
-{
- int i, r;
- for (i = 0; i < vui->nregions; i++)
- {
- if (vui->region_mmap_addr[i] != MAP_FAILED)
- {
-
- long page_sz = get_huge_page_size (vui->region_mmap_fd[i]);
-
- ssize_t map_sz = (vui->regions[i].memory_size +
- vui->regions[i].mmap_offset +
- page_sz - 1) & ~(page_sz - 1);
-
- r =
- munmap (vui->region_mmap_addr[i] - vui->regions[i].mmap_offset,
- map_sz);
-
- DBG_SOCK
- ("unmap memory region %d addr 0x%lx len 0x%lx page_sz 0x%x", i,
- vui->region_mmap_addr[i], map_sz, page_sz);
-
- vui->region_mmap_addr[i] = MAP_FAILED;
-
- if (r == -1)
- {
- clib_warning ("failed to unmap memory region (errno %d)",
- errno);
- }
- close (vui->region_mmap_fd[i]);
- }
- }
- vui->nregions = 0;
-}
-
-static void
-vhost_user_tx_thread_placement (vhost_user_intf_t * vui)
-{
- //Let's try to assign one queue to each thread
- u32 qid = 0;
- u32 thread_index = 0;
- vui->use_tx_spinlock = 0;
- while (1)
- {
- for (qid = 0; qid < VHOST_VRING_MAX_N / 2; qid++)
- {
- vhost_user_vring_t *rxvq = &vui->vrings[VHOST_VRING_IDX_RX (qid)];
- if (!rxvq->started || !rxvq->enabled)
- continue;
-
- vui->per_cpu_tx_qid[thread_index] = qid;
- thread_index++;
- if (thread_index == vlib_get_thread_main ()->n_vlib_mains)
- return;
- }
- //We need to loop, meaning the spinlock has to be used
- vui->use_tx_spinlock = 1;
- if (thread_index == 0)
- {
- //Could not find a single valid one
- for (thread_index = 0;
- thread_index < vlib_get_thread_main ()->n_vlib_mains;
- thread_index++)
- {
- vui->per_cpu_tx_qid[thread_index] = 0;
- }
- return;
- }
- }
-}
-
-/**
- * @brief Unassign existing interface/queue to thread mappings and re-assign
- * new interface/queue to thread mappings
- */
-static void
-vhost_user_rx_thread_placement ()
-{
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
- vhost_user_vring_t *txvq;
- vnet_main_t *vnm = vnet_get_main ();
- u32 qid;
- int rv;
- u16 *queue;
-
- // Scrap all existing mappings for all interfaces/queues
- /* *INDENT-OFF* */
- pool_foreach (vui, vum->vhost_user_interfaces, {
- vec_foreach (queue, vui->rx_queues)
- {
- rv = vnet_hw_interface_unassign_rx_thread (vnm, vui->hw_if_index,
- *queue);
- if (rv)
- clib_warning ("Warning: unable to unassign interface %d, "
- "queue %d: rc=%d", vui->hw_if_index, *queue, rv);
- }
- vec_reset_length (vui->rx_queues);
- });
- /* *INDENT-ON* */
-
- // Create the rx_queues for all interfaces
- /* *INDENT-OFF* */
- pool_foreach (vui, vum->vhost_user_interfaces, {
- for (qid = 0; qid < VHOST_VRING_MAX_N / 2; qid++)
- {
- txvq = &vui->vrings[VHOST_VRING_IDX_TX (qid)];
- if (txvq->started)
- {
- if (txvq->mode == VNET_HW_INTERFACE_RX_MODE_UNKNOWN)
- /* Set polling as the default */
- txvq->mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
- vec_add1 (vui->rx_queues, qid);
- }
- }
- });
- /* *INDENT-ON* */
-
- // Assign new mappings for all interfaces/queues
- /* *INDENT-OFF* */
- pool_foreach (vui, vum->vhost_user_interfaces, {
- vnet_hw_interface_set_input_node (vnm, vui->hw_if_index,
- vhost_user_input_node.index);
- vec_foreach (queue, vui->rx_queues)
- {
- vnet_hw_interface_assign_rx_thread (vnm, vui->hw_if_index, *queue,
- ~0);
- txvq = &vui->vrings[VHOST_VRING_IDX_TX (*queue)];
- rv = vnet_hw_interface_set_rx_mode (vnm, vui->hw_if_index, *queue,
- txvq->mode);
- if (rv)
- clib_warning ("Warning: unable to set rx mode for interface %d, "
- "queue %d: rc=%d", vui->hw_if_index, *queue, rv);
- }
- });
- /* *INDENT-ON* */
-}
-
-/** @brief Returns whether at least one TX and one RX vring are enabled */
-int
-vhost_user_intf_ready (vhost_user_intf_t * vui)
-{
- int i, found[2] = { }; //RX + TX
-
- for (i = 0; i < VHOST_VRING_MAX_N; i++)
- if (vui->vrings[i].started && vui->vrings[i].enabled)
- found[i & 1] = 1;
-
- return found[0] && found[1];
-}
-
-static void
-vhost_user_update_iface_state (vhost_user_intf_t * vui)
-{
- /* if we have pointers to descriptor table, go up */
- int is_up = vhost_user_intf_ready (vui);
- if (is_up != vui->is_up)
- {
- DBG_SOCK ("interface %d %s", vui->sw_if_index,
- is_up ? "ready" : "down");
- vnet_hw_interface_set_flags (vnet_get_main (), vui->hw_if_index,
- is_up ? VNET_HW_INTERFACE_FLAG_LINK_UP :
- 0);
- vui->is_up = is_up;
- }
- vhost_user_rx_thread_placement ();
- vhost_user_tx_thread_placement (vui);
-}
-
-static void
-vhost_user_set_interrupt_pending (vhost_user_intf_t * vui, u32 ifq)
-{
- u32 qid;
- vnet_main_t *vnm = vnet_get_main ();
-
- qid = ifq & 0xff;
- if ((qid & 1) == 0)
- /* Only care about the odd number, or TX, virtqueue */
- return;
-
- if (vhost_user_intf_ready (vui))
- // qid >> 1 is to convert virtqueue number to vring queue index
- vnet_device_input_set_interrupt_pending (vnm, vui->hw_if_index, qid >> 1);
-}
-
-static clib_error_t *
-vhost_user_callfd_read_ready (clib_file_t * uf)
-{
- __attribute__ ((unused)) int n;
- u8 buff[8];
-
- n = read (uf->file_descriptor, ((char *) &buff), 8);
-
- return 0;
-}
-
-static clib_error_t *
-vhost_user_kickfd_read_ready (clib_file_t * uf)
-{
- __attribute__ ((unused)) int n;
- u8 buff[8];
- vhost_user_intf_t *vui =
- pool_elt_at_index (vhost_user_main.vhost_user_interfaces,
- uf->private_data >> 8);
- u32 qid = uf->private_data & 0xff;
-
- n = read (uf->file_descriptor, ((char *) &buff), 8);
- DBG_SOCK ("if %d KICK queue %d", uf->private_data >> 8, qid);
- if (!vui->vrings[qid].started ||
- (vhost_user_intf_ready (vui) != vui->is_up))
- {
- vlib_worker_thread_barrier_sync (vlib_get_main ());
- vui->vrings[qid].started = 1;
- vhost_user_update_iface_state (vui);
- vlib_worker_thread_barrier_release (vlib_get_main ());
- }
-
- vhost_user_set_interrupt_pending (vui, uf->private_data);
- return 0;
-}
-
-/**
- * @brief Try once to lock the vring
- * @return 0 on success, non-zero on failure.
- */
-static inline int
-vhost_user_vring_try_lock (vhost_user_intf_t * vui, u32 qid)
-{
- return __sync_lock_test_and_set (vui->vring_locks[qid], 1);
-}
-
-/**
- * @brief Spin until the vring is successfully locked
- */
-static inline void
-vhost_user_vring_lock (vhost_user_intf_t * vui, u32 qid)
-{
- while (vhost_user_vring_try_lock (vui, qid))
- ;
-}
-
-/**
- * @brief Unlock the vring lock
- */
-static inline void
-vhost_user_vring_unlock (vhost_user_intf_t * vui, u32 qid)
-{
- *vui->vring_locks[qid] = 0;
-}
-
-static inline void
-vhost_user_vring_init (vhost_user_intf_t * vui, u32 qid)
-{
- vhost_user_vring_t *vring = &vui->vrings[qid];
- memset (vring, 0, sizeof (*vring));
- vring->kickfd_idx = ~0;
- vring->callfd_idx = ~0;
- vring->errfd = -1;
-
- /*
- * We have a bug with some qemu 2.5, and this may be a fix.
- * Feel like interpretation holy text, but this is from vhost-user.txt.
- * "
- * One queue pair is enabled initially. More queues are enabled
- * dynamically, by sending message VHOST_USER_SET_VRING_ENABLE.
- * "
- * Don't know who's right, but this is what DPDK does.
- */
- if (qid == 0 || qid == 1)
- vring->enabled = 1;
-}
-
-static inline void
-vhost_user_vring_close (vhost_user_intf_t * vui, u32 qid)
-{
- vhost_user_vring_t *vring = &vui->vrings[qid];
- if (vring->kickfd_idx != ~0)
- {
- clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
- vring->kickfd_idx);
- clib_file_del (&file_main, uf);
- vring->kickfd_idx = ~0;
- }
- if (vring->callfd_idx != ~0)
- {
- clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
- vring->callfd_idx);
- clib_file_del (&file_main, uf);
- vring->callfd_idx = ~0;
- }
- if (vring->errfd != -1)
- {
- close (vring->errfd);
- vring->errfd = -1;
- }
- vhost_user_vring_init (vui, qid);
-}
-
-static inline void
-vhost_user_if_disconnect (vhost_user_intf_t * vui)
-{
- vnet_main_t *vnm = vnet_get_main ();
- int q;
-
- vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
-
- if (vui->clib_file_index != ~0)
- {
- clib_file_del (&file_main, file_main.file_pool + vui->clib_file_index);
- vui->clib_file_index = ~0;
- }
-
- vui->is_up = 0;
-
- for (q = 0; q < VHOST_VRING_MAX_N; q++)
- vhost_user_vring_close (vui, q);
-
- unmap_all_mem_regions (vui);
- DBG_SOCK ("interface ifindex %d disconnected", vui->sw_if_index);
-}
-
-#define VHOST_LOG_PAGE 0x1000
-static_always_inline void
-vhost_user_log_dirty_pages_2 (vhost_user_intf_t * vui,
- u64 addr, u64 len, u8 is_host_address)
-{
- if (PREDICT_TRUE (vui->log_base_addr == 0
- || !(vui->features & (1 << FEAT_VHOST_F_LOG_ALL))))
- {
- return;
- }
- if (is_host_address)
- {
- addr = pointer_to_uword (map_user_mem (vui, (uword) addr));
- }
- if (PREDICT_FALSE ((addr + len - 1) / VHOST_LOG_PAGE / 8 >= vui->log_size))
- {
- DBG_SOCK ("vhost_user_log_dirty_pages(): out of range\n");
- return;
- }
-
- CLIB_MEMORY_BARRIER ();
- u64 page = addr / VHOST_LOG_PAGE;
- while (page * VHOST_LOG_PAGE < addr + len)
- {
- ((u8 *) vui->log_base_addr)[page / 8] |= 1 << page % 8;
- page++;
- }
-}
-
-static_always_inline void
-vhost_user_log_dirty_pages (vhost_user_intf_t * vui, u64 addr, u64 len)
-{
- vhost_user_log_dirty_pages_2 (vui, addr, len, 0);
-}
-
-#define vhost_user_log_dirty_ring(vui, vq, member) \
- if (PREDICT_FALSE(vq->log_used)) { \
- vhost_user_log_dirty_pages(vui, vq->log_guest_addr + STRUCT_OFFSET_OF(vring_used_t, member), \
- sizeof(vq->used->member)); \
- }
-
-static clib_error_t *
-vhost_user_socket_read (clib_file_t * uf)
-{
- int n, i;
- int fd, number_of_fds = 0;
- int fds[VHOST_MEMORY_MAX_NREGIONS];
- vhost_user_msg_t msg;
- struct msghdr mh;
- struct iovec iov[1];
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
- struct cmsghdr *cmsg;
- u8 q;
- clib_file_t template = { 0 };
- vnet_main_t *vnm = vnet_get_main ();
-
- vui = pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data);
-
- char control[CMSG_SPACE (VHOST_MEMORY_MAX_NREGIONS * sizeof (int))];
-
- memset (&mh, 0, sizeof (mh));
- memset (control, 0, sizeof (control));
-
- for (i = 0; i < VHOST_MEMORY_MAX_NREGIONS; i++)
- fds[i] = -1;
-
- /* set the payload */
- iov[0].iov_base = (void *) &msg;
- iov[0].iov_len = VHOST_USER_MSG_HDR_SZ;
-
- mh.msg_iov = iov;
- mh.msg_iovlen = 1;
- mh.msg_control = control;
- mh.msg_controllen = sizeof (control);
-
- n = recvmsg (uf->file_descriptor, &mh, 0);
-
- /* Stop workers to avoid end of the world */
- vlib_worker_thread_barrier_sync (vlib_get_main ());
-
- if (n != VHOST_USER_MSG_HDR_SZ)
- {
- if (n == -1)
- {
- DBG_SOCK ("recvmsg returned error %d %s", errno, strerror (errno));
- }
- else
- {
- DBG_SOCK ("n (%d) != VHOST_USER_MSG_HDR_SZ (%d)",
- n, VHOST_USER_MSG_HDR_SZ);
- }
- goto close_socket;
- }
-
- if (mh.msg_flags & MSG_CTRUNC)
- {
- DBG_SOCK ("MSG_CTRUNC is set");
- goto close_socket;
- }
-
- cmsg = CMSG_FIRSTHDR (&mh);
-
- if (cmsg && (cmsg->cmsg_len > 0) && (cmsg->cmsg_level == SOL_SOCKET) &&
- (cmsg->cmsg_type == SCM_RIGHTS) &&
- (cmsg->cmsg_len - CMSG_LEN (0) <=
- VHOST_MEMORY_MAX_NREGIONS * sizeof (int)))
- {
- number_of_fds = (cmsg->cmsg_len - CMSG_LEN (0)) / sizeof (int);
- clib_memcpy (fds, CMSG_DATA (cmsg), number_of_fds * sizeof (int));
- }
-
- /* version 1, no reply bit set */
- if ((msg.flags & 7) != 1)
- {
- DBG_SOCK ("malformed message received. closing socket");
- goto close_socket;
- }
-
- {
- int rv;
- rv =
- read (uf->file_descriptor, ((char *) &msg) + VHOST_USER_MSG_HDR_SZ,
- msg.size);
- if (rv < 0)
- {
- DBG_SOCK ("read failed %s", strerror (errno));
- goto close_socket;
- }
- else if (rv != msg.size)
- {
- DBG_SOCK ("message too short (read %dB should be %dB)", rv, msg.size);
- goto close_socket;
- }
- }
-
- switch (msg.request)
- {
- case VHOST_USER_GET_FEATURES:
- msg.flags |= 4;
- msg.u64 = (1ULL << FEAT_VIRTIO_NET_F_MRG_RXBUF) |
- (1ULL << FEAT_VIRTIO_NET_F_CTRL_VQ) |
- (1ULL << FEAT_VIRTIO_F_ANY_LAYOUT) |
- (1ULL << FEAT_VIRTIO_F_INDIRECT_DESC) |
- (1ULL << FEAT_VHOST_F_LOG_ALL) |
- (1ULL << FEAT_VIRTIO_NET_F_GUEST_ANNOUNCE) |
- (1ULL << FEAT_VIRTIO_NET_F_MQ) |
- (1ULL << FEAT_VHOST_USER_F_PROTOCOL_FEATURES) |
- (1ULL << FEAT_VIRTIO_F_VERSION_1);
- msg.u64 &= vui->feature_mask;
- msg.size = sizeof (msg.u64);
- DBG_SOCK ("if %d msg VHOST_USER_GET_FEATURES - reply 0x%016llx",
- vui->hw_if_index, msg.u64);
- break;
-
- case VHOST_USER_SET_FEATURES:
- DBG_SOCK ("if %d msg VHOST_USER_SET_FEATURES features 0x%016llx",
- vui->hw_if_index, msg.u64);
-
- vui->features = msg.u64;
-
- if (vui->features &
- ((1 << FEAT_VIRTIO_NET_F_MRG_RXBUF) |
- (1ULL << FEAT_VIRTIO_F_VERSION_1)))
- vui->virtio_net_hdr_sz = 12;
- else
- vui->virtio_net_hdr_sz = 10;
-
- vui->is_any_layout =
- (vui->features & (1 << FEAT_VIRTIO_F_ANY_LAYOUT)) ? 1 : 0;
-
- ASSERT (vui->virtio_net_hdr_sz < VLIB_BUFFER_PRE_DATA_SIZE);
- vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
- vui->is_up = 0;
-
- /*for (q = 0; q < VHOST_VRING_MAX_N; q++)
- vhost_user_vring_close(&vui->vrings[q]); */
-
- break;
-
- case VHOST_USER_SET_MEM_TABLE:
- DBG_SOCK ("if %d msg VHOST_USER_SET_MEM_TABLE nregions %d",
- vui->hw_if_index, msg.memory.nregions);
-
- if ((msg.memory.nregions < 1) ||
- (msg.memory.nregions > VHOST_MEMORY_MAX_NREGIONS))
- {
-
- DBG_SOCK ("number of mem regions must be between 1 and %i",
- VHOST_MEMORY_MAX_NREGIONS);
-
- goto close_socket;
- }
-
- if (msg.memory.nregions != number_of_fds)
- {
- DBG_SOCK ("each memory region must have FD");
- goto close_socket;
- }
- unmap_all_mem_regions (vui);
- for (i = 0; i < msg.memory.nregions; i++)
- {
- clib_memcpy (&(vui->regions[i]), &msg.memory.regions[i],
- sizeof (vhost_user_memory_region_t));
-
- long page_sz = get_huge_page_size (fds[i]);
-
- /* align size to page */
- ssize_t map_sz = (vui->regions[i].memory_size +
- vui->regions[i].mmap_offset +
- page_sz - 1) & ~(page_sz - 1);
-
- vui->region_mmap_addr[i] = mmap (0, map_sz, PROT_READ | PROT_WRITE,
- MAP_SHARED, fds[i], 0);
- vui->region_guest_addr_lo[i] = vui->regions[i].guest_phys_addr;
- vui->region_guest_addr_hi[i] = vui->regions[i].guest_phys_addr +
- vui->regions[i].memory_size;
-
- DBG_SOCK
- ("map memory region %d addr 0 len 0x%lx fd %d mapped 0x%lx "
- "page_sz 0x%x", i, map_sz, fds[i], vui->region_mmap_addr[i],
- page_sz);
-
- if (vui->region_mmap_addr[i] == MAP_FAILED)
- {
- clib_warning ("failed to map memory. errno is %d", errno);
- goto close_socket;
- }
- vui->region_mmap_addr[i] += vui->regions[i].mmap_offset;
- vui->region_mmap_fd[i] = fds[i];
-
- vui->nregions++;
- }
- break;
-
- case VHOST_USER_SET_VRING_NUM:
- DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_NUM idx %d num %d",
- vui->hw_if_index, msg.state.index, msg.state.num);
-
- if ((msg.state.num > 32768) || /* maximum ring size is 32768 */
- (msg.state.num == 0) || /* it cannot be zero */
- ((msg.state.num - 1) & msg.state.num)) /* must be power of 2 */
- goto close_socket;
- vui->vrings[msg.state.index].qsz_mask = msg.state.num - 1;
- break;
-
- case VHOST_USER_SET_VRING_ADDR:
- DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_ADDR idx %d",
- vui->hw_if_index, msg.state.index);
-
- if (msg.state.index >= VHOST_VRING_MAX_N)
- {
- DBG_SOCK ("invalid vring index VHOST_USER_SET_VRING_ADDR:"
- " %d >= %d", msg.state.index, VHOST_VRING_MAX_N);
- goto close_socket;
- }
-
- if (msg.size < sizeof (msg.addr))
- {
- DBG_SOCK ("vhost message is too short (%d < %d)",
- msg.size, sizeof (msg.addr));
- goto close_socket;
- }
-
- vui->vrings[msg.state.index].desc = (vring_desc_t *)
- map_user_mem (vui, msg.addr.desc_user_addr);
- vui->vrings[msg.state.index].used = (vring_used_t *)
- map_user_mem (vui, msg.addr.used_user_addr);
- vui->vrings[msg.state.index].avail = (vring_avail_t *)
- map_user_mem (vui, msg.addr.avail_user_addr);
-
- if ((vui->vrings[msg.state.index].desc == NULL) ||
- (vui->vrings[msg.state.index].used == NULL) ||
- (vui->vrings[msg.state.index].avail == NULL))
- {
- DBG_SOCK ("failed to map user memory for hw_if_index %d",
- vui->hw_if_index);
- goto close_socket;
- }
-
- vui->vrings[msg.state.index].log_guest_addr = msg.addr.log_guest_addr;
- vui->vrings[msg.state.index].log_used =
- (msg.addr.flags & (1 << VHOST_VRING_F_LOG)) ? 1 : 0;
-
- /* Spec says: If VHOST_USER_F_PROTOCOL_FEATURES has not been negotiated,
- the ring is initialized in an enabled state. */
- if (!(vui->features & (1 << FEAT_VHOST_USER_F_PROTOCOL_FEATURES)))
- {
- vui->vrings[msg.state.index].enabled = 1;
- }
-
- vui->vrings[msg.state.index].last_used_idx =
- vui->vrings[msg.state.index].last_avail_idx =
- vui->vrings[msg.state.index].used->idx;
-
- /* tell driver that we don't want interrupts */
- vui->vrings[msg.state.index].used->flags = VRING_USED_F_NO_NOTIFY;
- break;
-
- case VHOST_USER_SET_OWNER:
- DBG_SOCK ("if %d msg VHOST_USER_SET_OWNER", vui->hw_if_index);
- break;
-
- case VHOST_USER_RESET_OWNER:
- DBG_SOCK ("if %d msg VHOST_USER_RESET_OWNER", vui->hw_if_index);
- break;
-
- case VHOST_USER_SET_VRING_CALL:
- DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_CALL %d",
- vui->hw_if_index, msg.u64);
-
- q = (u8) (msg.u64 & 0xFF);
-
- /* if there is old fd, delete and close it */
- if (vui->vrings[q].callfd_idx != ~0)
- {
- clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
- vui->vrings[q].callfd_idx);
- clib_file_del (&file_main, uf);
- vui->vrings[q].callfd_idx = ~0;
- }
-
- if (!(msg.u64 & VHOST_USER_VRING_NOFD_MASK))
- {
- if (number_of_fds != 1)
- {
- DBG_SOCK ("More than one fd received !");
- goto close_socket;
- }
-
- template.read_function = vhost_user_callfd_read_ready;
- template.file_descriptor = fds[0];
- template.private_data =
- ((vui - vhost_user_main.vhost_user_interfaces) << 8) + q;
- vui->vrings[q].callfd_idx = clib_file_add (&file_main, &template);
- }
- else
- vui->vrings[q].callfd_idx = ~0;
- break;
-
- case VHOST_USER_SET_VRING_KICK:
- DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_KICK %d",
- vui->hw_if_index, msg.u64);
-
- q = (u8) (msg.u64 & 0xFF);
-
- if (vui->vrings[q].kickfd_idx != ~0)
- {
- clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
- vui->vrings[q].kickfd_idx);
- clib_file_del (&file_main, uf);
- vui->vrings[q].kickfd_idx = ~0;
- }
-
- if (!(msg.u64 & VHOST_USER_VRING_NOFD_MASK))
- {
- if (number_of_fds != 1)
- {
- DBG_SOCK ("More than one fd received !");
- goto close_socket;
- }
-
- template.read_function = vhost_user_kickfd_read_ready;
- template.file_descriptor = fds[0];
- template.private_data =
- (((uword) (vui - vhost_user_main.vhost_user_interfaces)) << 8) +
- q;
- vui->vrings[q].kickfd_idx = clib_file_add (&file_main, &template);
- }
- else
- {
- //When no kickfd is set, the queue is initialized as started
- vui->vrings[q].kickfd_idx = ~0;
- vui->vrings[q].started = 1;
- }
-
- break;
-
- case VHOST_USER_SET_VRING_ERR:
- DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_ERR %d",
- vui->hw_if_index, msg.u64);
-
- q = (u8) (msg.u64 & 0xFF);
-
- if (vui->vrings[q].errfd != -1)
- close (vui->vrings[q].errfd);
-
- if (!(msg.u64 & VHOST_USER_VRING_NOFD_MASK))
- {
- if (number_of_fds != 1)
- goto close_socket;
-
- vui->vrings[q].errfd = fds[0];
- }
- else
- vui->vrings[q].errfd = -1;
-
- break;
-
- case VHOST_USER_SET_VRING_BASE:
- DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_BASE idx %d num %d",
- vui->hw_if_index, msg.state.index, msg.state.num);
-
- vui->vrings[msg.state.index].last_avail_idx = msg.state.num;
- break;
-
- case VHOST_USER_GET_VRING_BASE:
- if (msg.state.index >= VHOST_VRING_MAX_N)
- {
- DBG_SOCK ("invalid vring index VHOST_USER_GET_VRING_BASE:"
- " %d >= %d", msg.state.index, VHOST_VRING_MAX_N);
- goto close_socket;
- }
-
- /*
- * Copy last_avail_idx from the vring before closing it because
- * closing the vring also initializes the vring last_avail_idx
- */
- msg.state.num = vui->vrings[msg.state.index].last_avail_idx;
- msg.flags |= 4;
- msg.size = sizeof (msg.state);
-
- /* Spec says: Client must [...] stop ring upon receiving VHOST_USER_GET_VRING_BASE. */
- vhost_user_vring_close (vui, msg.state.index);
- DBG_SOCK ("if %d msg VHOST_USER_GET_VRING_BASE idx %d num %d",
- vui->hw_if_index, msg.state.index, msg.state.num);
- break;
-
- case VHOST_USER_NONE:
- DBG_SOCK ("if %d msg VHOST_USER_NONE", vui->hw_if_index);
-
- break;
-
- case VHOST_USER_SET_LOG_BASE:
- {
- DBG_SOCK ("if %d msg VHOST_USER_SET_LOG_BASE", vui->hw_if_index);
-
- if (msg.size != sizeof (msg.log))
- {
- DBG_SOCK
- ("invalid msg size for VHOST_USER_SET_LOG_BASE: %d instead of %d",
- msg.size, sizeof (msg.log));
- goto close_socket;
- }
-
- if (!
- (vui->protocol_features & (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD)))
- {
- DBG_SOCK
- ("VHOST_USER_PROTOCOL_F_LOG_SHMFD not set but VHOST_USER_SET_LOG_BASE received");
- goto close_socket;
- }
-
- fd = fds[0];
- /* align size to page */
- long page_sz = get_huge_page_size (fd);
- ssize_t map_sz =
- (msg.log.size + msg.log.offset + page_sz - 1) & ~(page_sz - 1);
-
- vui->log_base_addr = mmap (0, map_sz, PROT_READ | PROT_WRITE,
- MAP_SHARED, fd, 0);
-
- DBG_SOCK
- ("map log region addr 0 len 0x%lx off 0x%lx fd %d mapped 0x%lx",
- map_sz, msg.log.offset, fd, vui->log_base_addr);
-
- if (vui->log_base_addr == MAP_FAILED)
- {
- clib_warning ("failed to map memory. errno is %d", errno);
- goto close_socket;
- }
-
- vui->log_base_addr += msg.log.offset;
- vui->log_size = msg.log.size;
-
- msg.flags |= 4;
- msg.size = sizeof (msg.u64);
-
- break;
- }
-
- case VHOST_USER_SET_LOG_FD:
- DBG_SOCK ("if %d msg VHOST_USER_SET_LOG_FD", vui->hw_if_index);
-
- break;
-
- case VHOST_USER_GET_PROTOCOL_FEATURES:
- msg.flags |= 4;
- msg.u64 = (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD) |
- (1 << VHOST_USER_PROTOCOL_F_MQ);
- msg.size = sizeof (msg.u64);
- DBG_SOCK
- ("if %d msg VHOST_USER_GET_PROTOCOL_FEATURES - reply 0x%016llx",
- vui->hw_if_index, msg.u64);
- break;
-
- case VHOST_USER_SET_PROTOCOL_FEATURES:
- DBG_SOCK
- ("if %d msg VHOST_USER_SET_PROTOCOL_FEATURES features 0x%016llx",
- vui->hw_if_index, msg.u64);
-
- vui->protocol_features = msg.u64;
-
- break;
-
- case VHOST_USER_GET_QUEUE_NUM:
- msg.flags |= 4;
- msg.u64 = VHOST_VRING_MAX_N;
- msg.size = sizeof (msg.u64);
- DBG_SOCK ("if %d msg VHOST_USER_GET_QUEUE_NUM - reply %d",
- vui->hw_if_index, msg.u64);
- break;
-
- case VHOST_USER_SET_VRING_ENABLE:
- DBG_SOCK ("if %d VHOST_USER_SET_VRING_ENABLE: %s queue %d",
- vui->hw_if_index, msg.state.num ? "enable" : "disable",
- msg.state.index);
- if (msg.state.index >= VHOST_VRING_MAX_N)
- {
- DBG_SOCK ("invalid vring index VHOST_USER_SET_VRING_ENABLE:"
- " %d >= %d", msg.state.index, VHOST_VRING_MAX_N);
- goto close_socket;
- }
-
- vui->vrings[msg.state.index].enabled = msg.state.num;
- break;
-
- default:
- DBG_SOCK ("unknown vhost-user message %d received. closing socket",
- msg.request);
- goto close_socket;
- }
-
- /* if we need to reply */
- if (msg.flags & 4)
- {
- n =
- send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
- if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
- {
- DBG_SOCK ("could not send message response");
- goto close_socket;
- }
- }
-
- vhost_user_update_iface_state (vui);
- vlib_worker_thread_barrier_release (vlib_get_main ());
- return 0;
-
-close_socket:
- vhost_user_if_disconnect (vui);
- vhost_user_update_iface_state (vui);
- vlib_worker_thread_barrier_release (vlib_get_main ());
- return 0;
-}
-
-static clib_error_t *
-vhost_user_socket_error (clib_file_t * uf)
-{
- vlib_main_t *vm = vlib_get_main ();
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui =
- pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data);
-
- DBG_SOCK ("socket error on if %d", vui->sw_if_index);
- vlib_worker_thread_barrier_sync (vm);
- vhost_user_if_disconnect (vui);
- vhost_user_rx_thread_placement ();
- vlib_worker_thread_barrier_release (vm);
- return 0;
-}
-
-static clib_error_t *
-vhost_user_socksvr_accept_ready (clib_file_t * uf)
-{
- int client_fd, client_len;
- struct sockaddr_un client;
- clib_file_t template = { 0 };
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
-
- vui = pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data);
-
- client_len = sizeof (client);
- client_fd = accept (uf->file_descriptor,
- (struct sockaddr *) &client,
- (socklen_t *) & client_len);
-
- if (client_fd < 0)
- return clib_error_return_unix (0, "accept");
-
- if (vui->clib_file_index != ~0)
- {
- DBG_SOCK ("Close client socket for vhost interface %d, fd %d",
- vui->sw_if_index, UNIX_GET_FD (vui->clib_file_index));
- clib_file_del (&file_main, file_main.file_pool + vui->clib_file_index);
- }
-
- DBG_SOCK ("New client socket for vhost interface %d, fd %d",
- vui->sw_if_index, client_fd);
- template.read_function = vhost_user_socket_read;
- template.error_function = vhost_user_socket_error;
- template.file_descriptor = client_fd;
- template.private_data = vui - vhost_user_main.vhost_user_interfaces;
- vui->clib_file_index = clib_file_add (&file_main, &template);
- return 0;
-}
-
-static clib_error_t *
-vhost_user_init (vlib_main_t * vm)
-{
- clib_error_t *error;
- vhost_user_main_t *vum = &vhost_user_main;
- vlib_thread_main_t *tm = vlib_get_thread_main ();
-
- error = vlib_call_init_function (vm, ip4_init);
- if (error)
- return error;
-
- vum->coalesce_frames = 32;
- vum->coalesce_time = 1e-3;
-
- vec_validate (vum->cpus, tm->n_vlib_mains - 1);
-
- vhost_cpu_t *cpu;
- vec_foreach (cpu, vum->cpus)
- {
- /* This is actually not necessary as validate already zeroes it
- * Just keeping the loop here for later because I am lazy. */
- cpu->rx_buffers_len = 0;
- }
-
- vum->random = random_default_seed ();
-
- mhash_init_c_string (&vum->if_index_by_sock_name, sizeof (uword));
-
- return 0;
-}
-
-VLIB_INIT_FUNCTION (vhost_user_init);
-
-static u8 *
-format_vhost_trace (u8 * s, va_list * va)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
- CLIB_UNUSED (vnet_main_t * vnm) = vnet_get_main ();
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_trace_t *t = va_arg (*va, vhost_trace_t *);
- vhost_user_intf_t *vui = pool_elt_at_index (vum->vhost_user_interfaces,
- t->device_index);
-
- vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, vui->sw_if_index);
-
- u32 indent = format_get_indent (s);
-
- s = format (s, "%U %U queue %d\n", format_white_space, indent,
- format_vnet_sw_interface_name, vnm, sw, t->qid);
-
- s = format (s, "%U virtio flags:\n", format_white_space, indent);
-#define _(n,i,st) \
- if (t->virtio_ring_flags & (1 << VIRTIO_TRACE_F_##n)) \
- s = format (s, "%U %s %s\n", format_white_space, indent, #n, st);
- foreach_virtio_trace_flags
-#undef _
- s = format (s, "%U virtio_net_hdr first_desc_len %u\n",
- format_white_space, indent, t->first_desc_len);
-
- s = format (s, "%U flags 0x%02x gso_type %u\n",
- format_white_space, indent,
- t->hdr.hdr.flags, t->hdr.hdr.gso_type);
-
- if (vui->virtio_net_hdr_sz == 12)
- s = format (s, "%U num_buff %u",
- format_white_space, indent, t->hdr.num_buffers);
-
- return s;
-}
-
-void
-vhost_user_rx_trace (vhost_trace_t * t,
- vhost_user_intf_t * vui, u16 qid,
- vlib_buffer_t * b, vhost_user_vring_t * txvq)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- u32 last_avail_idx = txvq->last_avail_idx;
- u32 desc_current = txvq->avail->ring[last_avail_idx & txvq->qsz_mask];
- vring_desc_t *hdr_desc = 0;
- virtio_net_hdr_mrg_rxbuf_t *hdr;
- u32 hint = 0;
-
- memset (t, 0, sizeof (*t));
- t->device_index = vui - vum->vhost_user_interfaces;
- t->qid = qid;
-
- hdr_desc = &txvq->desc[desc_current];
- if (txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_INDIRECT;
- /* Header is the first here */
- hdr_desc = map_guest_mem (vui, txvq->desc[desc_current].addr, &hint);
- }
- if (txvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT)
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SIMPLE_CHAINED;
- }
- if (!(txvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT) &&
- !(txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT))
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SINGLE_DESC;
- }
-
- t->first_desc_len = hdr_desc ? hdr_desc->len : 0;
-
- if (!hdr_desc || !(hdr = map_guest_mem (vui, hdr_desc->addr, &hint)))
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_MAP_ERROR;
- }
- else
- {
- u32 len = vui->virtio_net_hdr_sz;
- memcpy (&t->hdr, hdr, len > hdr_desc->len ? hdr_desc->len : len);
- }
-}
-
-static inline void
-vhost_user_send_call (vlib_main_t * vm, vhost_user_vring_t * vq)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- u64 x = 1;
- int fd = UNIX_GET_FD (vq->callfd_idx);
- int rv;
-
- rv = write (fd, &x, sizeof (x));
- if (rv <= 0)
- {
- clib_unix_warning
- ("Error: Could not write to unix socket for callfd %d", fd);
- return;
- }
-
- vq->n_since_last_int = 0;
- vq->int_deadline = vlib_time_now (vm) + vum->coalesce_time;
-}
-
-static_always_inline u32
-vhost_user_input_copy (vhost_user_intf_t * vui, vhost_copy_t * cpy,
- u16 copy_len, u32 * map_hint)
-{
- void *src0, *src1, *src2, *src3;
- if (PREDICT_TRUE (copy_len >= 4))
- {
- if (PREDICT_FALSE (!(src2 = map_guest_mem (vui, cpy[0].src, map_hint))))
- return 1;
- if (PREDICT_FALSE (!(src3 = map_guest_mem (vui, cpy[1].src, map_hint))))
- return 1;
-
- while (PREDICT_TRUE (copy_len >= 4))
- {
- src0 = src2;
- src1 = src3;
-
- if (PREDICT_FALSE
- (!(src2 = map_guest_mem (vui, cpy[2].src, map_hint))))
- return 1;
- if (PREDICT_FALSE
- (!(src3 = map_guest_mem (vui, cpy[3].src, map_hint))))
- return 1;
-
- CLIB_PREFETCH (src2, 64, LOAD);
- CLIB_PREFETCH (src3, 64, LOAD);
-
- clib_memcpy ((void *) cpy[0].dst, src0, cpy[0].len);
- clib_memcpy ((void *) cpy[1].dst, src1, cpy[1].len);
- copy_len -= 2;
- cpy += 2;
- }
- }
- while (copy_len)
- {
- if (PREDICT_FALSE (!(src0 = map_guest_mem (vui, cpy->src, map_hint))))
- return 1;
- clib_memcpy ((void *) cpy->dst, src0, cpy->len);
- copy_len -= 1;
- cpy += 1;
- }
- return 0;
-}
-
-/**
- * Try to discard packets from the tx ring (VPP RX path).
- * Returns the number of discarded packets.
- */
-u32
-vhost_user_rx_discard_packet (vlib_main_t * vm,
- vhost_user_intf_t * vui,
- vhost_user_vring_t * txvq, u32 discard_max)
-{
- /*
- * On the RX side, each packet corresponds to one descriptor
- * (it is the same whether it is a shallow descriptor, chained, or indirect).
- * Therefore, discarding a packet is like discarding a descriptor.
- */
- u32 discarded_packets = 0;
- u32 avail_idx = txvq->avail->idx;
- while (discarded_packets != discard_max)
- {
- if (avail_idx == txvq->last_avail_idx)
- goto out;
-
- u16 desc_chain_head =
- txvq->avail->ring[txvq->last_avail_idx & txvq->qsz_mask];
- txvq->last_avail_idx++;
- txvq->used->ring[txvq->last_used_idx & txvq->qsz_mask].id =
- desc_chain_head;
- txvq->used->ring[txvq->last_used_idx & txvq->qsz_mask].len = 0;
- vhost_user_log_dirty_ring (vui, txvq,
- ring[txvq->last_used_idx & txvq->qsz_mask]);
- txvq->last_used_idx++;
- discarded_packets++;
- }
-
-out:
- CLIB_MEMORY_BARRIER ();
- txvq->used->idx = txvq->last_used_idx;
- vhost_user_log_dirty_ring (vui, txvq, idx);
- return discarded_packets;
-}
-
-/*
- * In case of overflow, we need to rewind the array of allocated buffers.
- */
-static void
-vhost_user_input_rewind_buffers (vlib_main_t * vm,
- vhost_cpu_t * cpu, vlib_buffer_t * b_head)
-{
- u32 bi_current = cpu->rx_buffers[cpu->rx_buffers_len];
- vlib_buffer_t *b_current = vlib_get_buffer (vm, bi_current);
- b_current->current_length = 0;
- b_current->flags = 0;
- while (b_current != b_head)
- {
- cpu->rx_buffers_len++;
- bi_current = cpu->rx_buffers[cpu->rx_buffers_len];
- b_current = vlib_get_buffer (vm, bi_current);
- b_current->current_length = 0;
- b_current->flags = 0;
- }
- cpu->rx_buffers_len++;
-}
-
-static u32
-vhost_user_if_input (vlib_main_t * vm,
- vhost_user_main_t * vum,
- vhost_user_intf_t * vui,
- u16 qid, vlib_node_runtime_t * node,
- vnet_hw_interface_rx_mode mode)
-{
- vhost_user_vring_t *txvq = &vui->vrings[VHOST_VRING_IDX_TX (qid)];
- u16 n_rx_packets = 0;
- u32 n_rx_bytes = 0;
- u16 n_left;
- u32 n_left_to_next, *to_next;
- u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
- u32 n_trace = vlib_get_trace_count (vm, node);
- u32 map_hint = 0;
- u16 thread_index = vlib_get_thread_index ();
- u16 copy_len = 0;
-
- {
- /* do we have pending interrupts ? */
- vhost_user_vring_t *rxvq = &vui->vrings[VHOST_VRING_IDX_RX (qid)];
- f64 now = vlib_time_now (vm);
-
- if ((txvq->n_since_last_int) && (txvq->int_deadline < now))
- vhost_user_send_call (vm, txvq);
-
- if ((rxvq->n_since_last_int) && (rxvq->int_deadline < now))
- vhost_user_send_call (vm, rxvq);
- }
-
- /*
- * For adaptive mode, it is optimized to reduce interrupts.
- * If the scheduler switches the input node to polling due
- * to burst of traffic, we tell the driver no interrupt.
- * When the traffic subsides, the scheduler switches the node back to
- * interrupt mode. We must tell the driver we want interrupt.
- */
- if (PREDICT_FALSE (mode == VNET_HW_INTERFACE_RX_MODE_ADAPTIVE))
- {
- if ((node->flags &
- VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE) ||
- !(node->flags &
- VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE))
- /* Tell driver we want notification */
- txvq->used->flags = 0;
- else
- /* Tell driver we don't want notification */
- txvq->used->flags = VRING_USED_F_NO_NOTIFY;
- }
-
- if (PREDICT_FALSE (txvq->avail->flags & 0xFFFE))
- return 0;
-
- n_left = (u16) (txvq->avail->idx - txvq->last_avail_idx);
-
- /* nothing to do */
- if (PREDICT_FALSE (n_left == 0))
- return 0;
-
- if (PREDICT_FALSE (!vui->admin_up || !(txvq->enabled)))
- {
- /*
- * Discard input packet if interface is admin down or vring is not
- * enabled.
- * "For example, for a networking device, in the disabled state
- * client must not supply any new RX packets, but must process
- * and discard any TX packets."
- */
- vhost_user_rx_discard_packet (vm, vui, txvq,
- VHOST_USER_DOWN_DISCARD_COUNT);
- return 0;
- }
-
- if (PREDICT_FALSE (n_left == (txvq->qsz_mask + 1)))
- {
- /*
- * Informational error logging when VPP is not
- * receiving packets fast enough.
- */
- vlib_error_count (vm, node->node_index,
- VHOST_USER_INPUT_FUNC_ERROR_FULL_RX_QUEUE, 1);
- }
-
- if (n_left > VLIB_FRAME_SIZE)
- n_left = VLIB_FRAME_SIZE;
-
- /*
- * For small packets (<2kB), we will not need more than one vlib buffer
- * per packet. In case packets are bigger, we will just yeld at some point
- * in the loop and come back later. This is not an issue as for big packet,
- * processing cost really comes from the memory copy.
- * The assumption is that big packets will fit in 40 buffers.
- */
- if (PREDICT_FALSE (vum->cpus[thread_index].rx_buffers_len < n_left + 1 ||
- vum->cpus[thread_index].rx_buffers_len < 40))
- {
- u32 curr_len = vum->cpus[thread_index].rx_buffers_len;
- vum->cpus[thread_index].rx_buffers_len +=
- vlib_buffer_alloc_from_free_list (vm,
- vum->cpus[thread_index].rx_buffers +
- curr_len,
- VHOST_USER_RX_BUFFERS_N - curr_len,
- VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
-
- if (PREDICT_FALSE
- (vum->cpus[thread_index].rx_buffers_len <
- VHOST_USER_RX_BUFFER_STARVATION))
- {
- /* In case of buffer starvation, discard some packets from the queue
- * and log the event.
- * We keep doing best effort for the remaining packets. */
- u32 flush = (n_left + 1 > vum->cpus[thread_index].rx_buffers_len) ?
- n_left + 1 - vum->cpus[thread_index].rx_buffers_len : 1;
- flush = vhost_user_rx_discard_packet (vm, vui, txvq, flush);
-
- n_left -= flush;
- vlib_increment_simple_counter (vnet_main.
- interface_main.sw_if_counters +
- VNET_INTERFACE_COUNTER_DROP,
- vlib_get_thread_index (),
- vui->sw_if_index, flush);
-
- vlib_error_count (vm, vhost_user_input_node.index,
- VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER, flush);
- }
- }
-
- while (n_left > 0)
- {
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left > 0 && n_left_to_next > 0)
- {
- vlib_buffer_t *b_head, *b_current;
- u32 bi_current;
- u16 desc_current;
- u32 desc_data_offset;
- vring_desc_t *desc_table = txvq->desc;
-
- if (PREDICT_FALSE (vum->cpus[thread_index].rx_buffers_len <= 1))
- {
- /* Not enough rx_buffers
- * Note: We yeld on 1 so we don't need to do an additional
- * check for the next buffer prefetch.
- */
- n_left = 0;
- break;
- }
-
- desc_current =
- txvq->avail->ring[txvq->last_avail_idx & txvq->qsz_mask];
- vum->cpus[thread_index].rx_buffers_len--;
- bi_current = (vum->cpus[thread_index].rx_buffers)
- [vum->cpus[thread_index].rx_buffers_len];
- b_head = b_current = vlib_get_buffer (vm, bi_current);
- to_next[0] = bi_current; //We do that now so we can forget about bi_current
- to_next++;
- n_left_to_next--;
-
- vlib_prefetch_buffer_with_index (vm,
- (vum->
- cpus[thread_index].rx_buffers)
- [vum->cpus[thread_index].
- rx_buffers_len - 1], LOAD);
-
- /* Just preset the used descriptor id and length for later */
- txvq->used->ring[txvq->last_used_idx & txvq->qsz_mask].id =
- desc_current;
- txvq->used->ring[txvq->last_used_idx & txvq->qsz_mask].len = 0;
- vhost_user_log_dirty_ring (vui, txvq,
- ring[txvq->last_used_idx &
- txvq->qsz_mask]);
-
- /* The buffer should already be initialized */
- b_head->total_length_not_including_first_buffer = 0;
- b_head->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
-
- if (PREDICT_FALSE (n_trace))
- {
- //TODO: next_index is not exactly known at that point
- vlib_trace_buffer (vm, node, next_index, b_head,
- /* follow_chain */ 0);
- vhost_trace_t *t0 =
- vlib_add_trace (vm, node, b_head, sizeof (t0[0]));
- vhost_user_rx_trace (t0, vui, qid, b_head, txvq);
- n_trace--;
- vlib_set_trace_count (vm, node, n_trace);
- }
-
- /* This depends on the setup but is very consistent
- * So I think the CPU branch predictor will make a pretty good job
- * at optimizing the decision. */
- if (txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)
- {
- desc_table = map_guest_mem (vui, txvq->desc[desc_current].addr,
- &map_hint);
- desc_current = 0;
- if (PREDICT_FALSE (desc_table == 0))
- {
- vlib_error_count (vm, node->node_index,
- VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL, 1);
- goto out;
- }
- }
-
- if (PREDICT_TRUE (vui->is_any_layout) ||
- (!(desc_table[desc_current].flags & VIRTQ_DESC_F_NEXT)))
- {
- /* ANYLAYOUT or single buffer */
- desc_data_offset = vui->virtio_net_hdr_sz;
- }
- else
- {
- /* CSR case without ANYLAYOUT, skip 1st buffer */
- desc_data_offset = desc_table[desc_current].len;
- }
-
- while (1)
- {
- /* Get more input if necessary. Or end of packet. */
- if (desc_data_offset == desc_table[desc_current].len)
- {
- if (PREDICT_FALSE (desc_table[desc_current].flags &
- VIRTQ_DESC_F_NEXT))
- {
- desc_current = desc_table[desc_current].next;
- desc_data_offset = 0;
- }
- else
- {
- goto out;
- }
- }
-
- /* Get more output if necessary. Or end of packet. */
- if (PREDICT_FALSE
- (b_current->current_length == VLIB_BUFFER_DATA_SIZE))
- {
- if (PREDICT_FALSE
- (vum->cpus[thread_index].rx_buffers_len == 0))
- {
- /* Cancel speculation */
- to_next--;
- n_left_to_next++;
-
- /*
- * Checking if there are some left buffers.
- * If not, just rewind the used buffers and stop.
- * Note: Scheduled copies are not cancelled. This is
- * not an issue as they would still be valid. Useless,
- * but valid.
- */
- vhost_user_input_rewind_buffers (vm,
- &vum->cpus
- [thread_index],
- b_head);
- n_left = 0;
- goto stop;
- }
-
- /* Get next output */
- vum->cpus[thread_index].rx_buffers_len--;
- u32 bi_next =
- (vum->cpus[thread_index].rx_buffers)[vum->cpus
- [thread_index].rx_buffers_len];
- b_current->next_buffer = bi_next;
- b_current->flags |= VLIB_BUFFER_NEXT_PRESENT;
- bi_current = bi_next;
- b_current = vlib_get_buffer (vm, bi_current);
- }
-
- /* Prepare a copy order executed later for the data */
- vhost_copy_t *cpy = &vum->cpus[thread_index].copy[copy_len];
- copy_len++;
- u32 desc_data_l =
- desc_table[desc_current].len - desc_data_offset;
- cpy->len = VLIB_BUFFER_DATA_SIZE - b_current->current_length;
- cpy->len = (cpy->len > desc_data_l) ? desc_data_l : cpy->len;
- cpy->dst = (uword) (vlib_buffer_get_current (b_current) +
- b_current->current_length);
- cpy->src = desc_table[desc_current].addr + desc_data_offset;
-
- desc_data_offset += cpy->len;
-
- b_current->current_length += cpy->len;
- b_head->total_length_not_including_first_buffer += cpy->len;
- }
-
- out:
- CLIB_PREFETCH (&n_left, sizeof (n_left), LOAD);
-
- n_rx_bytes += b_head->total_length_not_including_first_buffer;
- n_rx_packets++;
-
- b_head->total_length_not_including_first_buffer -=
- b_head->current_length;
-
- /* consume the descriptor and return it as used */
- txvq->last_avail_idx++;
- txvq->last_used_idx++;
-
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b_head);
-
- vnet_buffer (b_head)->sw_if_index[VLIB_RX] = vui->sw_if_index;
- vnet_buffer (b_head)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- b_head->error = 0;
-
- {
- u32 next0 = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
-
- /* redirect if feature path enabled */
- vnet_feature_start_device_input_x1 (vui->sw_if_index, &next0,
- b_head);
-
- u32 bi = to_next[-1]; //Cannot use to_next[-1] in the macro
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi, next0);
- }
-
- n_left--;
-
- /*
- * Although separating memory copies from virtio ring parsing
- * is beneficial, we can offer to perform the copies from time
- * to time in order to free some space in the ring.
- */
- if (PREDICT_FALSE (copy_len >= VHOST_USER_RX_COPY_THRESHOLD))
- {
- if (PREDICT_FALSE
- (vhost_user_input_copy (vui, vum->cpus[thread_index].copy,
- copy_len, &map_hint)))
- {
- vlib_error_count (vm, node->node_index,
- VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL, 1);
- }
- copy_len = 0;
-
- /* give buffers back to driver */
- CLIB_MEMORY_BARRIER ();
- txvq->used->idx = txvq->last_used_idx;
- vhost_user_log_dirty_ring (vui, txvq, idx);
- }
- }
- stop:
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- /* Do the memory copies */
- if (PREDICT_FALSE
- (vhost_user_input_copy (vui, vum->cpus[thread_index].copy,
- copy_len, &map_hint)))
- {
- vlib_error_count (vm, node->node_index,
- VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL, 1);
- }
-
- /* give buffers back to driver */
- CLIB_MEMORY_BARRIER ();
- txvq->used->idx = txvq->last_used_idx;
- vhost_user_log_dirty_ring (vui, txvq, idx);
-
- /* interrupt (call) handling */
- if ((txvq->callfd_idx != ~0) &&
- !(txvq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
- {
- txvq->n_since_last_int += n_rx_packets;
-
- if (txvq->n_since_last_int > vum->coalesce_frames)
- vhost_user_send_call (vm, txvq);
- }
-
- /* increase rx counters */
- vlib_increment_combined_counter
- (vnet_main.interface_main.combined_sw_if_counters
- + VNET_INTERFACE_COUNTER_RX,
- vlib_get_thread_index (), vui->sw_if_index, n_rx_packets, n_rx_bytes);
-
- vnet_device_increment_rx_packets (thread_index, n_rx_packets);
-
- return n_rx_packets;
-}
-
-static uword
-vhost_user_input (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * f)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- uword n_rx_packets = 0;
- vhost_user_intf_t *vui;
- vnet_device_input_runtime_t *rt =
- (vnet_device_input_runtime_t *) node->runtime_data;
- vnet_device_and_queue_t *dq;
-
- vec_foreach (dq, rt->devices_and_queues)
- {
- if (clib_smp_swap (&dq->interrupt_pending, 0) ||
- (node->state == VLIB_NODE_STATE_POLLING))
- {
- vui =
- pool_elt_at_index (vum->vhost_user_interfaces, dq->dev_instance);
- n_rx_packets = vhost_user_if_input (vm, vum, vui, dq->queue_id, node,
- dq->mode);
- }
- }
-
- return n_rx_packets;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (vhost_user_input_node) = {
- .function = vhost_user_input,
- .type = VLIB_NODE_TYPE_INPUT,
- .name = "vhost-user-input",
- .sibling_of = "device-input",
-
- /* Will be enabled if/when hardware is detected. */
- .state = VLIB_NODE_STATE_DISABLED,
-
- .format_buffer = format_ethernet_header_with_length,
- .format_trace = format_vhost_trace,
-
- .n_errors = VHOST_USER_INPUT_FUNC_N_ERROR,
- .error_strings = vhost_user_input_func_error_strings,
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (vhost_user_input_node, vhost_user_input)
-/* *INDENT-ON* */
-
-
-void
-vhost_user_tx_trace (vhost_trace_t * t,
- vhost_user_intf_t * vui, u16 qid,
- vlib_buffer_t * b, vhost_user_vring_t * rxvq)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- u32 last_avail_idx = rxvq->last_avail_idx;
- u32 desc_current = rxvq->avail->ring[last_avail_idx & rxvq->qsz_mask];
- vring_desc_t *hdr_desc = 0;
- u32 hint = 0;
-
- memset (t, 0, sizeof (*t));
- t->device_index = vui - vum->vhost_user_interfaces;
- t->qid = qid;
-
- hdr_desc = &rxvq->desc[desc_current];
- if (rxvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_INDIRECT;
- /* Header is the first here */
- hdr_desc = map_guest_mem (vui, rxvq->desc[desc_current].addr, &hint);
- }
- if (rxvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT)
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SIMPLE_CHAINED;
- }
- if (!(rxvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT) &&
- !(rxvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT))
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SINGLE_DESC;
- }
-
- t->first_desc_len = hdr_desc ? hdr_desc->len : 0;
-}
-
-static_always_inline u32
-vhost_user_tx_copy (vhost_user_intf_t * vui, vhost_copy_t * cpy,
- u16 copy_len, u32 * map_hint)
-{
- void *dst0, *dst1, *dst2, *dst3;
- if (PREDICT_TRUE (copy_len >= 4))
- {
- if (PREDICT_FALSE (!(dst2 = map_guest_mem (vui, cpy[0].dst, map_hint))))
- return 1;
- if (PREDICT_FALSE (!(dst3 = map_guest_mem (vui, cpy[1].dst, map_hint))))
- return 1;
- while (PREDICT_TRUE (copy_len >= 4))
- {
- dst0 = dst2;
- dst1 = dst3;
-
- if (PREDICT_FALSE
- (!(dst2 = map_guest_mem (vui, cpy[2].dst, map_hint))))
- return 1;
- if (PREDICT_FALSE
- (!(dst3 = map_guest_mem (vui, cpy[3].dst, map_hint))))
- return 1;
-
- CLIB_PREFETCH ((void *) cpy[2].src, 64, LOAD);
- CLIB_PREFETCH ((void *) cpy[3].src, 64, LOAD);
-
- clib_memcpy (dst0, (void *) cpy[0].src, cpy[0].len);
- clib_memcpy (dst1, (void *) cpy[1].src, cpy[1].len);
-
- vhost_user_log_dirty_pages_2 (vui, cpy[0].dst, cpy[0].len, 1);
- vhost_user_log_dirty_pages_2 (vui, cpy[1].dst, cpy[1].len, 1);
- copy_len -= 2;
- cpy += 2;
- }
- }
- while (copy_len)
- {
- if (PREDICT_FALSE (!(dst0 = map_guest_mem (vui, cpy->dst, map_hint))))
- return 1;
- clib_memcpy (dst0, (void *) cpy->src, cpy->len);
- vhost_user_log_dirty_pages_2 (vui, cpy->dst, cpy->len, 1);
- copy_len -= 1;
- cpy += 1;
- }
- return 0;
-}
-
-
-static uword
-vhost_user_tx (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
- u32 *buffers = vlib_frame_args (frame);
- u32 n_left = frame->n_vectors;
- vhost_user_main_t *vum = &vhost_user_main;
- vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
- vhost_user_intf_t *vui =
- pool_elt_at_index (vum->vhost_user_interfaces, rd->dev_instance);
- u32 qid = ~0;
- vhost_user_vring_t *rxvq;
- u8 error;
- u32 thread_index = vlib_get_thread_index ();
- u32 map_hint = 0;
- u8 retry = 8;
- u16 copy_len;
- u16 tx_headers_len;
-
- if (PREDICT_FALSE (!vui->admin_up))
- {
- error = VHOST_USER_TX_FUNC_ERROR_DOWN;
- goto done3;
- }
-
- if (PREDICT_FALSE (!vui->is_up))
- {
- error = VHOST_USER_TX_FUNC_ERROR_NOT_READY;
- goto done3;
- }
-
- qid =
- VHOST_VRING_IDX_RX (*vec_elt_at_index
- (vui->per_cpu_tx_qid, thread_index));
- rxvq = &vui->vrings[qid];
- if (PREDICT_FALSE (vui->use_tx_spinlock))
- vhost_user_vring_lock (vui, qid);
-
-retry:
- error = VHOST_USER_TX_FUNC_ERROR_NONE;
- tx_headers_len = 0;
- copy_len = 0;
- while (n_left > 0)
- {
- vlib_buffer_t *b0, *current_b0;
- u16 desc_head, desc_index, desc_len;
- vring_desc_t *desc_table;
- uword buffer_map_addr;
- u32 buffer_len;
- u16 bytes_left;
-
- if (PREDICT_TRUE (n_left > 1))
- vlib_prefetch_buffer_with_index (vm, buffers[1], LOAD);
-
- b0 = vlib_get_buffer (vm, buffers[0]);
-
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- vum->cpus[thread_index].current_trace =
- vlib_add_trace (vm, node, b0,
- sizeof (*vum->cpus[thread_index].current_trace));
- vhost_user_tx_trace (vum->cpus[thread_index].current_trace,
- vui, qid / 2, b0, rxvq);
- }
-
- if (PREDICT_FALSE (rxvq->last_avail_idx == rxvq->avail->idx))
- {
- error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
- goto done;
- }
-
- desc_table = rxvq->desc;
- desc_head = desc_index =
- rxvq->avail->ring[rxvq->last_avail_idx & rxvq->qsz_mask];
-
- /* Go deeper in case of indirect descriptor
- * I don't know of any driver providing indirect for RX. */
- if (PREDICT_FALSE (rxvq->desc[desc_head].flags & VIRTQ_DESC_F_INDIRECT))
- {
- if (PREDICT_FALSE
- (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
- {
- error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
- goto done;
- }
- if (PREDICT_FALSE
- (!(desc_table =
- map_guest_mem (vui, rxvq->desc[desc_index].addr,
- &map_hint))))
- {
- error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
- goto done;
- }
- desc_index = 0;
- }
-
- desc_len = vui->virtio_net_hdr_sz;
- buffer_map_addr = desc_table[desc_index].addr;
- buffer_len = desc_table[desc_index].len;
-
- {
- // Get a header from the header array
- virtio_net_hdr_mrg_rxbuf_t *hdr =
- &vum->cpus[thread_index].tx_headers[tx_headers_len];
- tx_headers_len++;
- hdr->hdr.flags = 0;
- hdr->hdr.gso_type = 0;
- hdr->num_buffers = 1; //This is local, no need to check
-
- // Prepare a copy order executed later for the header
- vhost_copy_t *cpy = &vum->cpus[thread_index].copy[copy_len];
- copy_len++;
- cpy->len = vui->virtio_net_hdr_sz;
- cpy->dst = buffer_map_addr;
- cpy->src = (uword) hdr;
- }
-
- buffer_map_addr += vui->virtio_net_hdr_sz;
- buffer_len -= vui->virtio_net_hdr_sz;
- bytes_left = b0->current_length;
- current_b0 = b0;
- while (1)
- {
- if (buffer_len == 0)
- { //Get new output
- if (desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT)
- {
- //Next one is chained
- desc_index = desc_table[desc_index].next;
- buffer_map_addr = desc_table[desc_index].addr;
- buffer_len = desc_table[desc_index].len;
- }
- else if (vui->virtio_net_hdr_sz == 12) //MRG is available
- {
- virtio_net_hdr_mrg_rxbuf_t *hdr =
- &vum->cpus[thread_index].tx_headers[tx_headers_len - 1];
-
- //Move from available to used buffer
- rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].id =
- desc_head;
- rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].len =
- desc_len;
- vhost_user_log_dirty_ring (vui, rxvq,
- ring[rxvq->last_used_idx &
- rxvq->qsz_mask]);
-
- rxvq->last_avail_idx++;
- rxvq->last_used_idx++;
- hdr->num_buffers++;
- desc_len = 0;
-
- if (PREDICT_FALSE
- (rxvq->last_avail_idx == rxvq->avail->idx))
- {
- //Dequeue queued descriptors for this packet
- rxvq->last_used_idx -= hdr->num_buffers - 1;
- rxvq->last_avail_idx -= hdr->num_buffers - 1;
- error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
- goto done;
- }
-
- desc_table = rxvq->desc;
- desc_head = desc_index =
- rxvq->avail->ring[rxvq->last_avail_idx & rxvq->qsz_mask];
- if (PREDICT_FALSE
- (rxvq->desc[desc_head].flags & VIRTQ_DESC_F_INDIRECT))
- {
- //It is seriously unlikely that a driver will put indirect descriptor
- //after non-indirect descriptor.
- if (PREDICT_FALSE
- (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
- {
- error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
- goto done;
- }
- if (PREDICT_FALSE
- (!(desc_table =
- map_guest_mem (vui,
- rxvq->desc[desc_index].addr,
- &map_hint))))
- {
- error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
- goto done;
- }
- desc_index = 0;
- }
- buffer_map_addr = desc_table[desc_index].addr;
- buffer_len = desc_table[desc_index].len;
- }
- else
- {
- error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOMRG;
- goto done;
- }
- }
-
- {
- vhost_copy_t *cpy = &vum->cpus[thread_index].copy[copy_len];
- copy_len++;
- cpy->len = bytes_left;
- cpy->len = (cpy->len > buffer_len) ? buffer_len : cpy->len;
- cpy->dst = buffer_map_addr;
- cpy->src = (uword) vlib_buffer_get_current (current_b0) +
- current_b0->current_length - bytes_left;
-
- bytes_left -= cpy->len;
- buffer_len -= cpy->len;
- buffer_map_addr += cpy->len;
- desc_len += cpy->len;
-
- CLIB_PREFETCH (&rxvq->desc, CLIB_CACHE_LINE_BYTES, LOAD);
- }
-
- // Check if vlib buffer has more data. If not, get more or break.
- if (PREDICT_TRUE (!bytes_left))
- {
- if (PREDICT_FALSE
- (current_b0->flags & VLIB_BUFFER_NEXT_PRESENT))
- {
- current_b0 = vlib_get_buffer (vm, current_b0->next_buffer);
- bytes_left = current_b0->current_length;
- }
- else
- {
- //End of packet
- break;
- }
- }
- }
-
- //Move from available to used ring
- rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].id = desc_head;
- rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].len = desc_len;
- vhost_user_log_dirty_ring (vui, rxvq,
- ring[rxvq->last_used_idx & rxvq->qsz_mask]);
- rxvq->last_avail_idx++;
- rxvq->last_used_idx++;
-
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- vum->cpus[thread_index].current_trace->hdr =
- vum->cpus[thread_index].tx_headers[tx_headers_len - 1];
- }
-
- n_left--; //At the end for error counting when 'goto done' is invoked
-
- /*
- * Do the copy periodically to prevent
- * vum->cpus[thread_index].copy array overflow and corrupt memory
- */
- if (PREDICT_FALSE (copy_len >= VHOST_USER_TX_COPY_THRESHOLD))
- {
- if (PREDICT_FALSE
- (vhost_user_tx_copy (vui, vum->cpus[thread_index].copy,
- copy_len, &map_hint)))
- {
- vlib_error_count (vm, node->node_index,
- VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL, 1);
- }
- copy_len = 0;
-
- /* give buffers back to driver */
- CLIB_MEMORY_BARRIER ();
- rxvq->used->idx = rxvq->last_used_idx;
- vhost_user_log_dirty_ring (vui, rxvq, idx);
- }
- buffers++;
- }
-
-done:
- //Do the memory copies
- if (PREDICT_FALSE
- (vhost_user_tx_copy (vui, vum->cpus[thread_index].copy,
- copy_len, &map_hint)))
- {
- vlib_error_count (vm, node->node_index,
- VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL, 1);
- }
-
- CLIB_MEMORY_BARRIER ();
- rxvq->used->idx = rxvq->last_used_idx;
- vhost_user_log_dirty_ring (vui, rxvq, idx);
-
- /*
- * When n_left is set, error is always set to something too.
- * In case error is due to lack of remaining buffers, we go back up and
- * retry.
- * The idea is that it is better to waste some time on packets
- * that have been processed already than dropping them and get
- * more fresh packets with a good likelyhood that they will be dropped too.
- * This technique also gives more time to VM driver to pick-up packets.
- * In case the traffic flows from physical to virtual interfaces, this
- * technique will end-up leveraging the physical NIC buffer in order to
- * absorb the VM's CPU jitter.
- */
- if (n_left && (error == VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF) && retry)
- {
- retry--;
- goto retry;
- }
-
- /* interrupt (call) handling */
- if ((rxvq->callfd_idx != ~0) &&
- !(rxvq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
- {
- rxvq->n_since_last_int += frame->n_vectors - n_left;
-
- if (rxvq->n_since_last_int > vum->coalesce_frames)
- vhost_user_send_call (vm, rxvq);
- }
-
- vhost_user_vring_unlock (vui, qid);
-
-done3:
- if (PREDICT_FALSE (n_left && error != VHOST_USER_TX_FUNC_ERROR_NONE))
- {
- vlib_error_count (vm, node->node_index, error, n_left);
- vlib_increment_simple_counter
- (vnet_main.interface_main.sw_if_counters
- + VNET_INTERFACE_COUNTER_DROP,
- thread_index, vui->sw_if_index, n_left);
- }
-
- vlib_buffer_free (vm, vlib_frame_args (frame), frame->n_vectors);
- return frame->n_vectors;
-}
-
-static uword
-vhost_user_send_interrupt_process (vlib_main_t * vm,
- vlib_node_runtime_t * rt, vlib_frame_t * f)
-{
- vhost_user_intf_t *vui;
- f64 timeout = 3153600000.0 /* 100 years */ ;
- uword event_type, *event_data = 0;
- vhost_user_main_t *vum = &vhost_user_main;
- u16 *queue;
- f64 now, poll_time_remaining;
- f64 next_timeout;
- u8 stop_timer = 0;
-
- while (1)
- {
- poll_time_remaining =
- vlib_process_wait_for_event_or_clock (vm, timeout);
- event_type = vlib_process_get_events (vm, &event_data);
- vec_reset_length (event_data);
-
- /*
- * Use the remaining timeout if it is less than coalesce time to avoid
- * resetting the existing timer in the middle of expiration
- */
- timeout = poll_time_remaining;
- if (vlib_process_suspend_time_is_zero (timeout) ||
- (timeout > vum->coalesce_time))
- timeout = vum->coalesce_time;
-
- now = vlib_time_now (vm);
- switch (event_type)
- {
- case VHOST_USER_EVENT_STOP_TIMER:
- stop_timer = 1;
- break;
-
- case VHOST_USER_EVENT_START_TIMER:
- stop_timer = 0;
- if (!vlib_process_suspend_time_is_zero (poll_time_remaining))
- break;
- /* fall through */
-
- case ~0:
- /* *INDENT-OFF* */
- pool_foreach (vui, vum->vhost_user_interfaces, {
- next_timeout = timeout;
- vec_foreach (queue, vui->rx_queues)
- {
- vhost_user_vring_t *rxvq =
- &vui->vrings[VHOST_VRING_IDX_RX (*queue)];
- vhost_user_vring_t *txvq =
- &vui->vrings[VHOST_VRING_IDX_TX (*queue)];
-
- if (txvq->n_since_last_int)
- {
- if (now >= txvq->int_deadline)
- vhost_user_send_call (vm, txvq);
- else
- next_timeout = txvq->int_deadline - now;
- }
-
- if (rxvq->n_since_last_int)
- {
- if (now >= rxvq->int_deadline)
- vhost_user_send_call (vm, rxvq);
- else
- next_timeout = rxvq->int_deadline - now;
- }
-
- if ((next_timeout < timeout) && (next_timeout > 0.0))
- timeout = next_timeout;
- }
- });
- /* *INDENT-ON* */
- break;
-
- default:
- clib_warning ("BUG: unhandled event type %d", event_type);
- break;
- }
- /* No less than 1 millisecond */
- if (timeout < 1e-3)
- timeout = 1e-3;
- if (stop_timer)
- timeout = 3153600000.0;
- }
- return 0;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (vhost_user_send_interrupt_node,static) = {
- .function = vhost_user_send_interrupt_process,
- .type = VLIB_NODE_TYPE_PROCESS,
- .name = "vhost-user-send-interrupt-process",
-};
-/* *INDENT-ON* */
-
-static clib_error_t *
-vhost_user_interface_rx_mode_change (vnet_main_t * vnm, u32 hw_if_index,
- u32 qid, vnet_hw_interface_rx_mode mode)
-{
- vlib_main_t *vm = vnm->vlib_main;
- vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index);
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui =
- pool_elt_at_index (vum->vhost_user_interfaces, hif->dev_instance);
- vhost_user_vring_t *txvq = &vui->vrings[VHOST_VRING_IDX_TX (qid)];
-
- if ((mode == VNET_HW_INTERFACE_RX_MODE_INTERRUPT) ||
- (mode == VNET_HW_INTERFACE_RX_MODE_ADAPTIVE))
- {
- if (txvq->kickfd_idx == ~0)
- {
- // We cannot support interrupt mode if the driver opts out
- return clib_error_return (0, "Driver does not support interrupt");
- }
- if (txvq->mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
- {
- vum->ifq_count++;
- // Start the timer if this is the first encounter on interrupt
- // interface/queue
- if ((vum->ifq_count == 1) &&
- (vum->coalesce_time > 0.0) && (vum->coalesce_frames > 0))
- vlib_process_signal_event (vm,
- vhost_user_send_interrupt_node.index,
- VHOST_USER_EVENT_START_TIMER, 0);
- }
- }
- else if (mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
- {
- if (((txvq->mode == VNET_HW_INTERFACE_RX_MODE_INTERRUPT) ||
- (txvq->mode == VNET_HW_INTERFACE_RX_MODE_ADAPTIVE)) &&
- vum->ifq_count)
- {
- vum->ifq_count--;
- // Stop the timer if there is no more interrupt interface/queue
- if ((vum->ifq_count == 0) &&
- (vum->coalesce_time > 0.0) && (vum->coalesce_frames > 0))
- vlib_process_signal_event (vm,
- vhost_user_send_interrupt_node.index,
- VHOST_USER_EVENT_STOP_TIMER, 0);
- }
- }
-
- txvq->mode = mode;
- if (mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
- txvq->used->flags = VRING_USED_F_NO_NOTIFY;
- else if ((mode == VNET_HW_INTERFACE_RX_MODE_ADAPTIVE) ||
- (mode == VNET_HW_INTERFACE_RX_MODE_INTERRUPT))
- txvq->used->flags = 0;
- else
- {
- clib_warning ("BUG: unhandled mode %d changed for if %d queue %d", mode,
- hw_if_index, qid);
- return clib_error_return (0, "unsupported");
- }
-
- return 0;
-}
-
-static clib_error_t *
-vhost_user_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
- u32 flags)
-{
- vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index);
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui =
- pool_elt_at_index (vum->vhost_user_interfaces, hif->dev_instance);
- u32 hw_flags = 0;
- vui->admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
- hw_flags = vui->admin_up ? VNET_HW_INTERFACE_FLAG_LINK_UP : 0;
-
- vnet_hw_interface_set_flags (vnm, vui->hw_if_index, hw_flags);
-
- return /* no error */ 0;
-}
-
-/* *INDENT-OFF* */
-VNET_DEVICE_CLASS (vhost_user_dev_class,static) = {
- .name = "vhost-user",
- .tx_function = vhost_user_tx,
- .tx_function_n_errors = VHOST_USER_TX_FUNC_N_ERROR,
- .tx_function_error_strings = vhost_user_tx_func_error_strings,
- .format_device_name = format_vhost_user_interface_name,
- .name_renumber = vhost_user_name_renumber,
- .admin_up_down_function = vhost_user_interface_admin_up_down,
- .rx_mode_change_function = vhost_user_interface_rx_mode_change,
- .format_tx_trace = format_vhost_trace,
-};
-
-VLIB_DEVICE_TX_FUNCTION_MULTIARCH (vhost_user_dev_class,
- vhost_user_tx)
-/* *INDENT-ON* */
-
-static uword
-vhost_user_process (vlib_main_t * vm,
- vlib_node_runtime_t * rt, vlib_frame_t * f)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
- struct sockaddr_un sun;
- int sockfd;
- clib_file_t template = { 0 };
- f64 timeout = 3153600000.0 /* 100 years */ ;
- uword *event_data = 0;
-
- sockfd = -1;
- sun.sun_family = AF_UNIX;
- template.read_function = vhost_user_socket_read;
- template.error_function = vhost_user_socket_error;
-
- while (1)
- {
- vlib_process_wait_for_event_or_clock (vm, timeout);
- vlib_process_get_events (vm, &event_data);
- vec_reset_length (event_data);
-
- timeout = 3.0;
-
- /* *INDENT-OFF* */
- pool_foreach (vui, vum->vhost_user_interfaces, {
-
- if (vui->unix_server_index == ~0) { //Nothing to do for server sockets
- if (vui->clib_file_index == ~0)
- {
- if ((sockfd < 0) &&
- ((sockfd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0))
- {
- /*
- * 1st time error or new error for this interface,
- * spit out the message and record the error
- */
- if (!vui->sock_errno || (vui->sock_errno != errno))
- {
- clib_unix_warning
- ("Error: Could not open unix socket for %s",
- vui->sock_filename);
- vui->sock_errno = errno;
- }
- continue;
- }
-
- /* try to connect */
- strncpy (sun.sun_path, (char *) vui->sock_filename,
- sizeof (sun.sun_path) - 1);
-
- /* Avoid hanging VPP if the other end does not accept */
- if (fcntl(sockfd, F_SETFL, O_NONBLOCK) < 0)
- clib_unix_warning ("fcntl");
-
- if (connect (sockfd, (struct sockaddr *) &sun,
- sizeof (struct sockaddr_un)) == 0)
- {
- /* Set the socket to blocking as it was before */
- if (fcntl(sockfd, F_SETFL, 0) < 0)
- clib_unix_warning ("fcntl2");
-
- vui->sock_errno = 0;
- template.file_descriptor = sockfd;
- template.private_data =
- vui - vhost_user_main.vhost_user_interfaces;
- vui->clib_file_index = clib_file_add (&file_main, &template);
-
- /* This sockfd is considered consumed */
- sockfd = -1;
- }
- else
- {
- vui->sock_errno = errno;
- }
- }
- else
- {
- /* check if socket is alive */
- int error = 0;
- socklen_t len = sizeof (error);
- int fd = UNIX_GET_FD(vui->clib_file_index);
- int retval =
- getsockopt (fd, SOL_SOCKET, SO_ERROR, &error, &len);
-
- if (retval)
- {
- DBG_SOCK ("getsockopt returned %d", retval);
- vhost_user_if_disconnect (vui);
- }
- }
- }
- });
- /* *INDENT-ON* */
- }
- return 0;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (vhost_user_process_node,static) = {
- .function = vhost_user_process,
- .type = VLIB_NODE_TYPE_PROCESS,
- .name = "vhost-user-process",
-};
-/* *INDENT-ON* */
-
-/**
- * Disables and reset interface structure.
- * It can then be either init again, or removed from used interfaces.
- */
-static void
-vhost_user_term_if (vhost_user_intf_t * vui)
-{
- int q;
- vhost_user_main_t *vum = &vhost_user_main;
-
- // disconnect interface sockets
- vhost_user_if_disconnect (vui);
- vhost_user_update_iface_state (vui);
-
- for (q = 0; q < VHOST_VRING_MAX_N; q++)
- {
- clib_mem_free ((void *) vui->vring_locks[q]);
- }
-
- if (vui->unix_server_index != ~0)
- {
- //Close server socket
- clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
- vui->unix_server_index);
- clib_file_del (&file_main, uf);
- vui->unix_server_index = ~0;
- unlink (vui->sock_filename);
- }
-
- mhash_unset (&vum->if_index_by_sock_name, vui->sock_filename,
- &vui->if_index);
-}
-
-int
-vhost_user_delete_if (vnet_main_t * vnm, vlib_main_t * vm, u32 sw_if_index)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
- int rv = 0;
- vnet_hw_interface_t *hwif;
- u16 *queue;
-
- if (!(hwif = vnet_get_sup_hw_interface (vnm, sw_if_index)) ||
- hwif->dev_class_index != vhost_user_dev_class.index)
- return VNET_API_ERROR_INVALID_SW_IF_INDEX;
-
- DBG_SOCK ("Deleting vhost-user interface %s (instance %d)",
- hwif->name, hwif->dev_instance);
-
- vui = pool_elt_at_index (vum->vhost_user_interfaces, hwif->dev_instance);
-
- vec_foreach (queue, vui->rx_queues)
- {
- vhost_user_vring_t *txvq;
-
- txvq = &vui->vrings[VHOST_VRING_IDX_TX (*queue)];
- if ((vum->ifq_count > 0) &&
- ((txvq->mode == VNET_HW_INTERFACE_RX_MODE_INTERRUPT) ||
- (txvq->mode == VNET_HW_INTERFACE_RX_MODE_ADAPTIVE)))
- {
- vum->ifq_count--;
- // Stop the timer if there is no more interrupt interface/queue
- if ((vum->ifq_count == 0) &&
- (vum->coalesce_time > 0.0) && (vum->coalesce_frames > 0))
- {
- vlib_process_signal_event (vm,
- vhost_user_send_interrupt_node.index,
- VHOST_USER_EVENT_STOP_TIMER, 0);
- break;
- }
- }
- }
-
- // Disable and reset interface
- vhost_user_term_if (vui);
-
- // Reset renumbered iface
- if (hwif->dev_instance <
- vec_len (vum->show_dev_instance_by_real_dev_instance))
- vum->show_dev_instance_by_real_dev_instance[hwif->dev_instance] = ~0;
-
- // Delete ethernet interface
- ethernet_delete_interface (vnm, vui->hw_if_index);
-
- // Back to pool
- pool_put (vum->vhost_user_interfaces, vui);
-
- return rv;
-}
-
-static clib_error_t *
-vhost_user_exit (vlib_main_t * vm)
-{
- vnet_main_t *vnm = vnet_get_main ();
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
-
- vlib_worker_thread_barrier_sync (vlib_get_main ());
- /* *INDENT-OFF* */
- pool_foreach (vui, vum->vhost_user_interfaces, {
- vhost_user_delete_if (vnm, vm, vui->sw_if_index);
- });
- /* *INDENT-ON* */
- vlib_worker_thread_barrier_release (vlib_get_main ());
- return 0;
-}
-
-VLIB_MAIN_LOOP_EXIT_FUNCTION (vhost_user_exit);
-
-/**
- * Open server unix socket on specified sock_filename.
- */
-static int
-vhost_user_init_server_sock (const char *sock_filename, int *sock_fd)
-{
- int rv = 0;
- struct sockaddr_un un = { };
- int fd;
- /* create listening socket */
- if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
- return VNET_API_ERROR_SYSCALL_ERROR_1;
-
- un.sun_family = AF_UNIX;
- strncpy ((char *) un.sun_path, (char *) sock_filename,
- sizeof (un.sun_path) - 1);
-
- /* remove if exists */
- unlink ((char *) sock_filename);
-
- if (bind (fd, (struct sockaddr *) &un, sizeof (un)) == -1)
- {
- rv = VNET_API_ERROR_SYSCALL_ERROR_2;
- goto error;
- }
-
- if (listen (fd, 1) == -1)
- {
- rv = VNET_API_ERROR_SYSCALL_ERROR_3;
- goto error;
- }
-
- *sock_fd = fd;
- return 0;
-
-error:
- close (fd);
- return rv;
-}
-
-/**
- * Create ethernet interface for vhost user interface.
- */
-static void
-vhost_user_create_ethernet (vnet_main_t * vnm, vlib_main_t * vm,
- vhost_user_intf_t * vui, u8 * hwaddress)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- u8 hwaddr[6];
- clib_error_t *error;
-
- /* create hw and sw interface */
- if (hwaddress)
- {
- clib_memcpy (hwaddr, hwaddress, 6);
- }
- else
- {
- random_u32 (&vum->random);
- clib_memcpy (hwaddr + 2, &vum->random, sizeof (vum->random));
- hwaddr[0] = 2;
- hwaddr[1] = 0xfe;
- }
-
- error = ethernet_register_interface
- (vnm,
- vhost_user_dev_class.index,
- vui - vum->vhost_user_interfaces /* device instance */ ,
- hwaddr /* ethernet address */ ,
- &vui->hw_if_index, 0 /* flag change */ );
-
- if (error)
- clib_error_report (error);
-
- vnet_sw_interface_set_mtu (vnm, vui->sw_if_index, 9000);
-}
-
-/*
- * Initialize vui with specified attributes
- */
-static void
-vhost_user_vui_init (vnet_main_t * vnm,
- vhost_user_intf_t * vui,
- int server_sock_fd,
- const char *sock_filename,
- u64 feature_mask, u32 * sw_if_index)
-{
- vnet_sw_interface_t *sw;
- int q;
- vhost_user_main_t *vum = &vhost_user_main;
- vnet_hw_interface_t *hw;
-
- hw = vnet_get_hw_interface (vnm, vui->hw_if_index);
- sw = vnet_get_hw_sw_interface (vnm, vui->hw_if_index);
- if (server_sock_fd != -1)
- {
- clib_file_t template = { 0 };
- template.read_function = vhost_user_socksvr_accept_ready;
- template.file_descriptor = server_sock_fd;
- template.private_data = vui - vum->vhost_user_interfaces; //hw index
- vui->unix_server_index = clib_file_add (&file_main, &template);
- }
- else
- {
- vui->unix_server_index = ~0;
- }
-
- vui->sw_if_index = sw->sw_if_index;
- strncpy (vui->sock_filename, sock_filename,
- ARRAY_LEN (vui->sock_filename) - 1);
- vui->sock_errno = 0;
- vui->is_up = 0;
- vui->feature_mask = feature_mask;
- vui->clib_file_index = ~0;
- vui->log_base_addr = 0;
- vui->if_index = vui - vum->vhost_user_interfaces;
- mhash_set_mem (&vum->if_index_by_sock_name, vui->sock_filename,
- &vui->if_index, 0);
-
- for (q = 0; q < VHOST_VRING_MAX_N; q++)
- vhost_user_vring_init (vui, q);
-
- hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
- vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
-
- if (sw_if_index)
- *sw_if_index = vui->sw_if_index;
-
- for (q = 0; q < VHOST_VRING_MAX_N; q++)
- {
- vui->vring_locks[q] = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
- CLIB_CACHE_LINE_BYTES);
- memset ((void *) vui->vring_locks[q], 0, CLIB_CACHE_LINE_BYTES);
- }
-
- vec_validate (vui->per_cpu_tx_qid,
- vlib_get_thread_main ()->n_vlib_mains - 1);
- vhost_user_tx_thread_placement (vui);
-}
-
-int
-vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm,
- const char *sock_filename,
- u8 is_server,
- u32 * sw_if_index,
- u64 feature_mask,
- u8 renumber, u32 custom_dev_instance, u8 * hwaddr)
-{
- vhost_user_intf_t *vui = NULL;
- u32 sw_if_idx = ~0;
- int rv = 0;
- int server_sock_fd = -1;
- vhost_user_main_t *vum = &vhost_user_main;
- uword *if_index;
-
- if (sock_filename == NULL || !(strlen (sock_filename) > 0))
- {
- return VNET_API_ERROR_INVALID_ARGUMENT;
- }
-
- if_index = mhash_get (&vum->if_index_by_sock_name, (void *) sock_filename);
- if (if_index)
- {
- if (sw_if_index)
- {
- vui = &vum->vhost_user_interfaces[*if_index];
- *sw_if_index = vui->sw_if_index;
- }
- return VNET_API_ERROR_IF_ALREADY_EXISTS;
- }
-
- if (is_server)
- {
- if ((rv =
- vhost_user_init_server_sock (sock_filename, &server_sock_fd)) != 0)
- {
- return rv;
- }
- }
-
- pool_get (vhost_user_main.vhost_user_interfaces, vui);
-
- vhost_user_create_ethernet (vnm, vm, vui, hwaddr);
- vhost_user_vui_init (vnm, vui, server_sock_fd, sock_filename,
- feature_mask, &sw_if_idx);
-
- if (renumber)
- vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
-
- if (sw_if_index)
- *sw_if_index = sw_if_idx;
-
- // Process node must connect
- vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
-
- return rv;
-}
-
-int
-vhost_user_modify_if (vnet_main_t * vnm, vlib_main_t * vm,
- const char *sock_filename,
- u8 is_server,
- u32 sw_if_index,
- u64 feature_mask, u8 renumber, u32 custom_dev_instance)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui = NULL;
- u32 sw_if_idx = ~0;
- int server_sock_fd = -1;
- int rv = 0;
- vnet_hw_interface_t *hwif;
- uword *if_index;
-
- if (!(hwif = vnet_get_sup_hw_interface (vnm, sw_if_index)) ||
- hwif->dev_class_index != vhost_user_dev_class.index)
- return VNET_API_ERROR_INVALID_SW_IF_INDEX;
-
- if (sock_filename == NULL || !(strlen (sock_filename) > 0))
- return VNET_API_ERROR_INVALID_ARGUMENT;
-
- vui = vec_elt_at_index (vum->vhost_user_interfaces, hwif->dev_instance);
-
- /*
- * Disallow changing the interface to have the same path name
- * as other interface
- */
- if_index = mhash_get (&vum->if_index_by_sock_name, (void *) sock_filename);
- if (if_index && (*if_index != vui->if_index))
- return VNET_API_ERROR_IF_ALREADY_EXISTS;
-
- // First try to open server socket
- if (is_server)
- if ((rv = vhost_user_init_server_sock (sock_filename,
- &server_sock_fd)) != 0)
- return rv;
-
- vhost_user_term_if (vui);
- vhost_user_vui_init (vnm, vui, server_sock_fd,
- sock_filename, feature_mask, &sw_if_idx);
-
- if (renumber)
- vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
-
- // Process node must connect
- vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
-
- return rv;
-}
-
-clib_error_t *
-vhost_user_connect_command_fn (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
-{
- unformat_input_t _line_input, *line_input = &_line_input;
- u8 *sock_filename = NULL;
- u32 sw_if_index;
- u8 is_server = 0;
- u64 feature_mask = (u64) ~ (0ULL);
- u8 renumber = 0;
- u32 custom_dev_instance = ~0;
- u8 hwaddr[6];
- u8 *hw = NULL;
- clib_error_t *error = NULL;
-
- /* Get a line of input. */
- if (!unformat_user (input, unformat_line_input, line_input))
- return 0;
-
- while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat (line_input, "socket %s", &sock_filename))
- ;
- else if (unformat (line_input, "server"))
- is_server = 1;
- else if (unformat (line_input, "feature-mask 0x%llx", &feature_mask))
- ;
- else
- if (unformat
- (line_input, "hwaddr %U", unformat_ethernet_address, hwaddr))
- hw = hwaddr;
- else if (unformat (line_input, "renumber %d", &custom_dev_instance))
- {
- renumber = 1;
- }
- else
- {
- error = clib_error_return (0, "unknown input `%U'",
- format_unformat_error, line_input);
- goto done;
- }
- }
-
- vnet_main_t *vnm = vnet_get_main ();
-
- int rv;
- if ((rv = vhost_user_create_if (vnm, vm, (char *) sock_filename,
- is_server, &sw_if_index, feature_mask,
- renumber, custom_dev_instance, hw)))
- {
- error = clib_error_return (0, "vhost_user_create_if returned %d", rv);
- goto done;
- }
-
- vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
- sw_if_index);
-
-done:
- vec_free (sock_filename);
- unformat_free (line_input);
-
- return error;
-}
-
-clib_error_t *
-vhost_user_delete_command_fn (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
-{
- unformat_input_t _line_input, *line_input = &_line_input;
- u32 sw_if_index = ~0;
- vnet_main_t *vnm = vnet_get_main ();
- clib_error_t *error = NULL;
-
- /* Get a line of input. */
- if (!unformat_user (input, unformat_line_input, line_input))
- return 0;
-
- while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat (line_input, "sw_if_index %d", &sw_if_index))
- ;
- else if (unformat
- (line_input, "%U", unformat_vnet_sw_interface, vnm,
- &sw_if_index))
- {
- vnet_hw_interface_t *hwif =
- vnet_get_sup_hw_interface (vnm, sw_if_index);
- if (hwif == NULL ||
- vhost_user_dev_class.index != hwif->dev_class_index)
- {
- error = clib_error_return (0, "Not a vhost interface");
- goto done;
- }
- }
- else
- {
- error = clib_error_return (0, "unknown input `%U'",
- format_unformat_error, line_input);
- goto done;
- }
- }
-
- vhost_user_delete_if (vnm, vm, sw_if_index);
-
-done:
- unformat_free (line_input);
-
- return error;
-}
-
-int
-vhost_user_dump_ifs (vnet_main_t * vnm, vlib_main_t * vm,
- vhost_user_intf_details_t ** out_vuids)
-{
- int rv = 0;
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
- vhost_user_intf_details_t *r_vuids = NULL;
- vhost_user_intf_details_t *vuid = NULL;
- u32 *hw_if_indices = 0;
- vnet_hw_interface_t *hi;
- u8 *s = NULL;
- int i;
-
- if (!out_vuids)
- return -1;
-
- pool_foreach (vui, vum->vhost_user_interfaces,
- vec_add1 (hw_if_indices, vui->hw_if_index);
- );
-
- for (i = 0; i < vec_len (hw_if_indices); i++)
- {
- hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
- vui = pool_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
-
- vec_add2 (r_vuids, vuid, 1);
- vuid->sw_if_index = vui->sw_if_index;
- vuid->virtio_net_hdr_sz = vui->virtio_net_hdr_sz;
- vuid->features = vui->features;
- vuid->num_regions = vui->nregions;
- vuid->is_server = vui->unix_server_index != ~0;
- vuid->sock_errno = vui->sock_errno;
- strncpy ((char *) vuid->sock_filename, (char *) vui->sock_filename,
- sizeof (vuid->sock_filename));
- vuid->sock_filename[ARRAY_LEN (vuid->sock_filename) - 1] = '\0';
- s = format (s, "%v%c", hi->name, 0);
-
- strncpy ((char *) vuid->if_name, (char *) s,
- ARRAY_LEN (vuid->if_name) - 1);
- _vec_len (s) = 0;
- }
-
- vec_free (s);
- vec_free (hw_if_indices);
-
- *out_vuids = r_vuids;
-
- return rv;
-}
-
-clib_error_t *
-show_vhost_user_command_fn (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
-{
- clib_error_t *error = 0;
- vnet_main_t *vnm = vnet_get_main ();
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
- u32 hw_if_index, *hw_if_indices = 0;
- vnet_hw_interface_t *hi;
- u16 *queue;
- u32 ci;
- int i, j, q;
- int show_descr = 0;
- struct feat_struct
- {
- u8 bit;
- char *str;
- };
- struct feat_struct *feat_entry;
-
- static struct feat_struct feat_array[] = {
-#define _(s,b) { .str = #s, .bit = b, },
- foreach_virtio_net_feature
-#undef _
- {.str = NULL}
- };
-
-#define foreach_protocol_feature \
- _(VHOST_USER_PROTOCOL_F_MQ) \
- _(VHOST_USER_PROTOCOL_F_LOG_SHMFD)
-
- static struct feat_struct proto_feat_array[] = {
-#define _(s) { .str = #s, .bit = s},
- foreach_protocol_feature
-#undef _
- {.str = NULL}
- };
-
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat
- (input, "%U", unformat_vnet_hw_interface, vnm, &hw_if_index))
- {
- hi = vnet_get_hw_interface (vnm, hw_if_index);
- if (vhost_user_dev_class.index != hi->dev_class_index)
- {
- error = clib_error_return (0, "unknown input `%U'",
- format_unformat_error, input);
- goto done;
- }
- vec_add1 (hw_if_indices, hw_if_index);
- }
- else if (unformat (input, "descriptors") || unformat (input, "desc"))
- show_descr = 1;
- else
- {
- error = clib_error_return (0, "unknown input `%U'",
- format_unformat_error, input);
- goto done;
- }
- }
- if (vec_len (hw_if_indices) == 0)
- {
- pool_foreach (vui, vum->vhost_user_interfaces,
- vec_add1 (hw_if_indices, vui->hw_if_index);
- );
- }
- vlib_cli_output (vm, "Virtio vhost-user interfaces");
- vlib_cli_output (vm, "Global:\n coalesce frames %d time %e",
- vum->coalesce_frames, vum->coalesce_time);
- vlib_cli_output (vm, " number of rx virtqueues in interrupt mode: %d",
- vum->ifq_count);
-
- for (i = 0; i < vec_len (hw_if_indices); i++)
- {
- hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
- vui = pool_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
- vlib_cli_output (vm, "Interface: %s (ifindex %d)",
- hi->name, hw_if_indices[i]);
-
- vlib_cli_output (vm, "virtio_net_hdr_sz %d\n"
- " features mask (0x%llx): \n"
- " features (0x%llx): \n",
- vui->virtio_net_hdr_sz, vui->feature_mask,
- vui->features);
-
- feat_entry = (struct feat_struct *) &feat_array;
- while (feat_entry->str)
- {
- if (vui->features & (1ULL << feat_entry->bit))
- vlib_cli_output (vm, " %s (%d)", feat_entry->str,
- feat_entry->bit);
- feat_entry++;
- }
-
- vlib_cli_output (vm, " protocol features (0x%llx)",
- vui->protocol_features);
- feat_entry = (struct feat_struct *) &proto_feat_array;
- while (feat_entry->str)
- {
- if (vui->protocol_features & (1ULL << feat_entry->bit))
- vlib_cli_output (vm, " %s (%d)", feat_entry->str,
- feat_entry->bit);
- feat_entry++;
- }
-
- vlib_cli_output (vm, "\n");
-
- vlib_cli_output (vm, " socket filename %s type %s errno \"%s\"\n\n",
- vui->sock_filename,
- (vui->unix_server_index != ~0) ? "server" : "client",
- strerror (vui->sock_errno));
-
- vlib_cli_output (vm, " rx placement: ");
-
- vec_foreach (queue, vui->rx_queues)
- {
- vnet_main_t *vnm = vnet_get_main ();
- uword thread_index;
- vnet_hw_interface_rx_mode mode;
-
- thread_index = vnet_get_device_input_thread_index (vnm,
- vui->hw_if_index,
- *queue);
- vnet_hw_interface_get_rx_mode (vnm, vui->hw_if_index, *queue, &mode);
- vlib_cli_output (vm, " thread %d on vring %d, %U\n",
- thread_index, VHOST_VRING_IDX_TX (*queue),
- format_vnet_hw_interface_rx_mode, mode);
- }
-
- vlib_cli_output (vm, " tx placement: %s\n",
- vui->use_tx_spinlock ? "spin-lock" : "lock-free");
-
- vec_foreach_index (ci, vui->per_cpu_tx_qid)
- {
- vlib_cli_output (vm, " thread %d on vring %d\n", ci,
- VHOST_VRING_IDX_RX (vui->per_cpu_tx_qid[ci]));
- }
-
- vlib_cli_output (vm, "\n");
-
- vlib_cli_output (vm, " Memory regions (total %d)\n", vui->nregions);
-
- if (vui->nregions)
- {
- vlib_cli_output (vm,
- " region fd guest_phys_addr memory_size userspace_addr mmap_offset mmap_addr\n");
- vlib_cli_output (vm,
- " ====== ===== ================== ================== ================== ================== ==================\n");
- }
- for (j = 0; j < vui->nregions; j++)
- {
- vlib_cli_output (vm,
- " %d %-5d 0x%016lx 0x%016lx 0x%016lx 0x%016lx 0x%016lx\n",
- j, vui->region_mmap_fd[j],
- vui->regions[j].guest_phys_addr,
- vui->regions[j].memory_size,
- vui->regions[j].userspace_addr,
- vui->regions[j].mmap_offset,
- pointer_to_uword (vui->region_mmap_addr[j]));
- }
- for (q = 0; q < VHOST_VRING_MAX_N; q++)
- {
- if (!vui->vrings[q].started)
- continue;
-
- vlib_cli_output (vm, "\n Virtqueue %d (%s%s)\n", q,
- (q & 1) ? "RX" : "TX",
- vui->vrings[q].enabled ? "" : " disabled");
-
- vlib_cli_output (vm,
- " qsz %d last_avail_idx %d last_used_idx %d\n",
- vui->vrings[q].qsz_mask + 1,
- vui->vrings[q].last_avail_idx,
- vui->vrings[q].last_used_idx);
-
- if (vui->vrings[q].avail && vui->vrings[q].used)
- vlib_cli_output (vm,
- " avail.flags %x avail.idx %d used.flags %x used.idx %d\n",
- vui->vrings[q].avail->flags,
- vui->vrings[q].avail->idx,
- vui->vrings[q].used->flags,
- vui->vrings[q].used->idx);
-
- int kickfd = UNIX_GET_FD (vui->vrings[q].kickfd_idx);
- int callfd = UNIX_GET_FD (vui->vrings[q].callfd_idx);
- vlib_cli_output (vm, " kickfd %d callfd %d errfd %d\n",
- kickfd, callfd, vui->vrings[q].errfd);
-
- if (show_descr)
- {
- vlib_cli_output (vm, "\n descriptor table:\n");
- vlib_cli_output (vm,
- " id addr len flags next user_addr\n");
- vlib_cli_output (vm,
- " ===== ================== ===== ====== ===== ==================\n");
- for (j = 0; j < vui->vrings[q].qsz_mask + 1; j++)
- {
- u32 mem_hint = 0;
- vlib_cli_output (vm,
- " %-5d 0x%016lx %-5d 0x%04x %-5d 0x%016lx\n",
- j, vui->vrings[q].desc[j].addr,
- vui->vrings[q].desc[j].len,
- vui->vrings[q].desc[j].flags,
- vui->vrings[q].desc[j].next,
- pointer_to_uword (map_guest_mem
- (vui,
- vui->vrings[q].desc[j].
- addr, &mem_hint)));
- }
- }
- }
- vlib_cli_output (vm, "\n");
- }
-done:
- vec_free (hw_if_indices);
- return error;
-}
-
-/*
- * CLI functions
- */
-
-/*?
- * Create a vHost User interface. Once created, a new virtual interface
- * will exist with the name '<em>VirtualEthernet0/0/x</em>', where '<em>x</em>'
- * is the next free index.
- *
- * There are several parameters associated with a vHost interface:
- *
- * - <b>socket <socket-filename></b> - Name of the linux socket used by hypervisor
- * and VPP to manage the vHost interface. If in '<em>server</em>' mode, VPP will
- * create the socket if it does not already exist. If in '<em>client</em>' mode,
- * hypervisor will create the socket if it does not already exist. The VPP code
- * is indifferent to the file location. However, if SELinux is enabled, then the
- * socket needs to be created in '<em>/var/run/vpp/</em>'.
- *
- * - <b>server</b> - Optional flag to indicate that VPP should be the server for
- * the linux socket. If not provided, VPP will be the client. In '<em>server</em>'
- * mode, the VM can be reset without tearing down the vHost Interface. In
- * '<em>client</em>' mode, VPP can be reset without bringing down the VM and
- * tearing down the vHost Interface.
- *
- * - <b>feature-mask <hex></b> - Optional virtio/vhost feature set negotiated at
- * startup. <b>This is intended for degugging only.</b> It is recommended that this
- * parameter not be used except by experienced users. By default, all supported
- * features will be advertised. Otherwise, provide the set of features desired.
- * - 0x000008000 (15) - VIRTIO_NET_F_MRG_RXBUF
- * - 0x000020000 (17) - VIRTIO_NET_F_CTRL_VQ
- * - 0x000200000 (21) - VIRTIO_NET_F_GUEST_ANNOUNCE
- * - 0x000400000 (22) - VIRTIO_NET_F_MQ
- * - 0x004000000 (26) - VHOST_F_LOG_ALL
- * - 0x008000000 (27) - VIRTIO_F_ANY_LAYOUT
- * - 0x010000000 (28) - VIRTIO_F_INDIRECT_DESC
- * - 0x040000000 (30) - VHOST_USER_F_PROTOCOL_FEATURES
- * - 0x100000000 (32) - VIRTIO_F_VERSION_1
- *
- * - <b>hwaddr <mac-addr></b> - Optional ethernet address, can be in either
- * X:X:X:X:X:X unix or X.X.X cisco format.
- *
- * - <b>renumber <dev_instance></b> - Optional parameter which allows the instance
- * in the name to be specified. If instance already exists, name will be used
- * anyway and multiple instances will have the same name. Use with caution.
- *
- * @cliexpar
- * Example of how to create a vhost interface with VPP as the client and all features enabled:
- * @cliexstart{create vhost-user socket /var/run/vpp/vhost1.sock}
- * VirtualEthernet0/0/0
- * @cliexend
- * Example of how to create a vhost interface with VPP as the server and with just
- * multiple queues enabled:
- * @cliexstart{create vhost-user socket /var/run/vpp/vhost2.sock server feature-mask 0x40400000}
- * VirtualEthernet0/0/1
- * @cliexend
- * Once the vHost interface is created, enable the interface using:
- * @cliexcmd{set interface state VirtualEthernet0/0/0 up}
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (vhost_user_connect_command, static) = {
- .path = "create vhost-user",
- .short_help = "create vhost-user socket <socket-filename> [server] "
- "[feature-mask <hex>] [hwaddr <mac-addr>] [renumber <dev_instance>] ",
- .function = vhost_user_connect_command_fn,
-};
-/* *INDENT-ON* */
-
-/*?
- * Delete a vHost User interface using the interface name or the
- * software interface index. Use the '<em>show interface</em>'
- * command to determine the software interface index. On deletion,
- * the linux socket will not be deleted.
- *
- * @cliexpar
- * Example of how to delete a vhost interface by name:
- * @cliexcmd{delete vhost-user VirtualEthernet0/0/1}
- * Example of how to delete a vhost interface by software interface index:
- * @cliexcmd{delete vhost-user sw_if_index 1}
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (vhost_user_delete_command, static) = {
- .path = "delete vhost-user",
- .short_help = "delete vhost-user {<interface> | sw_if_index <sw_idx>}",
- .function = vhost_user_delete_command_fn,
-};
-
-/*?
- * Display the attributes of a single vHost User interface (provide interface
- * name), multiple vHost User interfaces (provide a list of interface names seperated
- * by spaces) or all Vhost User interfaces (omit an interface name to display all
- * vHost interfaces).
- *
- * @cliexpar
- * @parblock
- * Example of how to display a vhost interface:
- * @cliexstart{show vhost-user VirtualEthernet0/0/0}
- * Virtio vhost-user interfaces
- * Global:
- * coalesce frames 32 time 1e-3
- * Interface: VirtualEthernet0/0/0 (ifindex 1)
- * virtio_net_hdr_sz 12
- * features mask (0xffffffffffffffff):
- * features (0x50408000):
- * VIRTIO_NET_F_MRG_RXBUF (15)
- * VIRTIO_NET_F_MQ (22)
- * VIRTIO_F_INDIRECT_DESC (28)
- * VHOST_USER_F_PROTOCOL_FEATURES (30)
- * protocol features (0x3)
- * VHOST_USER_PROTOCOL_F_MQ (0)
- * VHOST_USER_PROTOCOL_F_LOG_SHMFD (1)
- *
- * socket filename /var/run/vpp/vhost1.sock type client errno "Success"
- *
- * rx placement:
- * thread 1 on vring 1
- * thread 1 on vring 5
- * thread 2 on vring 3
- * thread 2 on vring 7
- * tx placement: spin-lock
- * thread 0 on vring 0
- * thread 1 on vring 2
- * thread 2 on vring 0
- *
- * Memory regions (total 2)
- * region fd guest_phys_addr memory_size userspace_addr mmap_offset mmap_addr
- * ====== ===== ================== ================== ================== ================== ==================
- * 0 60 0x0000000000000000 0x00000000000a0000 0x00002aaaaac00000 0x0000000000000000 0x00002aab2b400000
- * 1 61 0x00000000000c0000 0x000000003ff40000 0x00002aaaaacc0000 0x00000000000c0000 0x00002aababcc0000
- *
- * Virtqueue 0 (TX)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 128 used.flags 1 used.idx 0
- * kickfd 62 callfd 64 errfd -1
- *
- * Virtqueue 1 (RX)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
- * kickfd 65 callfd 66 errfd -1
- *
- * Virtqueue 2 (TX)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 128 used.flags 1 used.idx 0
- * kickfd 63 callfd 70 errfd -1
- *
- * Virtqueue 3 (RX)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
- * kickfd 72 callfd 74 errfd -1
- *
- * Virtqueue 4 (TX disabled)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
- * kickfd 76 callfd 78 errfd -1
- *
- * Virtqueue 5 (RX disabled)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
- * kickfd 80 callfd 82 errfd -1
- *
- * Virtqueue 6 (TX disabled)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
- * kickfd 84 callfd 86 errfd -1
- *
- * Virtqueue 7 (RX disabled)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
- * kickfd 88 callfd 90 errfd -1
- *
- * @cliexend
- *
- * The optional '<em>descriptors</em>' parameter will display the same output as
- * the previous example but will include the descriptor table for each queue.
- * The output is truncated below:
- * @cliexstart{show vhost-user VirtualEthernet0/0/0 descriptors}
- * Virtio vhost-user interfaces
- * Global:
- * coalesce frames 32 time 1e-3
- * Interface: VirtualEthernet0/0/0 (ifindex 1)
- * virtio_net_hdr_sz 12
- * features mask (0xffffffffffffffff):
- * features (0x50408000):
- * VIRTIO_NET_F_MRG_RXBUF (15)
- * VIRTIO_NET_F_MQ (22)
- * :
- * Virtqueue 0 (TX)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 128 used.flags 1 used.idx 0
- * kickfd 62 callfd 64 errfd -1
- *
- * descriptor table:
- * id addr len flags next user_addr
- * ===== ================== ===== ====== ===== ==================
- * 0 0x0000000010b6e974 2060 0x0002 1 0x00002aabbc76e974
- * 1 0x0000000010b6e034 2060 0x0002 2 0x00002aabbc76e034
- * 2 0x0000000010b6d6f4 2060 0x0002 3 0x00002aabbc76d6f4
- * 3 0x0000000010b6cdb4 2060 0x0002 4 0x00002aabbc76cdb4
- * 4 0x0000000010b6c474 2060 0x0002 5 0x00002aabbc76c474
- * 5 0x0000000010b6bb34 2060 0x0002 6 0x00002aabbc76bb34
- * 6 0x0000000010b6b1f4 2060 0x0002 7 0x00002aabbc76b1f4
- * 7 0x0000000010b6a8b4 2060 0x0002 8 0x00002aabbc76a8b4
- * 8 0x0000000010b69f74 2060 0x0002 9 0x00002aabbc769f74
- * 9 0x0000000010b69634 2060 0x0002 10 0x00002aabbc769634
- * 10 0x0000000010b68cf4 2060 0x0002 11 0x00002aabbc768cf4
- * :
- * 249 0x0000000000000000 0 0x0000 250 0x00002aab2b400000
- * 250 0x0000000000000000 0 0x0000 251 0x00002aab2b400000
- * 251 0x0000000000000000 0 0x0000 252 0x00002aab2b400000
- * 252 0x0000000000000000 0 0x0000 253 0x00002aab2b400000
- * 253 0x0000000000000000 0 0x0000 254 0x00002aab2b400000
- * 254 0x0000000000000000 0 0x0000 255 0x00002aab2b400000
- * 255 0x0000000000000000 0 0x0000 32768 0x00002aab2b400000
- *
- * Virtqueue 1 (RX)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * :
- * @cliexend
- * @endparblock
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (show_vhost_user_command, static) = {
- .path = "show vhost-user",
- .short_help = "show vhost-user [<interface> [<interface> [..]]] [descriptors]",
- .function = show_vhost_user_command_fn,
-};
-/* *INDENT-ON* */
-
-clib_error_t *
-debug_vhost_user_command_fn (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
-{
- unformat_input_t _line_input, *line_input = &_line_input;
- clib_error_t *error = NULL;
- vhost_user_main_t *vum = &vhost_user_main;
- u8 onoff = 0;
- u8 input_found = 0;
-
- /* Get a line of input. */
- if (!unformat_user (input, unformat_line_input, line_input))
- return clib_error_return (0, "missing argument");
-
- while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
- {
- if (input_found)
- {
- error = clib_error_return (0, "unknown input `%U'",
- format_unformat_error, line_input);
- goto done;
- }
-
- if (unformat (line_input, "on"))
- {
- input_found = 1;
- onoff = 1;
- }
- else if (unformat (line_input, "off"))
- {
- input_found = 1;
- onoff = 0;
- }
- else
- {
- error = clib_error_return (0, "unknown input `%U'",
- format_unformat_error, line_input);
- goto done;
- }
- }
-
- vum->debug = onoff;
-
-done:
- unformat_free (line_input);
-
- return error;
-}
-
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (debug_vhost_user_command, static) = {
- .path = "debug vhost-user",
- .short_help = "debug vhost-user <on | off>",
- .function = debug_vhost_user_command_fn,
-};
-/* *INDENT-ON* */
-
-static clib_error_t *
-vhost_user_config (vlib_main_t * vm, unformat_input_t * input)
-{
- vhost_user_main_t *vum = &vhost_user_main;
-
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat (input, "coalesce-frames %d", &vum->coalesce_frames))
- ;
- else if (unformat (input, "coalesce-time %f", &vum->coalesce_time))
- ;
- else if (unformat (input, "dont-dump-memory"))
- vum->dont_dump_vhost_user_memory = 1;
- else
- return clib_error_return (0, "unknown input `%U'",
- format_unformat_error, input);
- }
-
- return 0;
-}
-
-/* vhost-user { ... } configuration. */
-VLIB_CONFIG_FUNCTION (vhost_user_config, "vhost-user");
-
-void
-vhost_user_unmap_all (void)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
-
- if (vum->dont_dump_vhost_user_memory)
- {
- pool_foreach (vui, vum->vhost_user_interfaces,
- unmap_all_mem_regions (vui);
- );
- }
-}
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
diff --git a/src/vnet/devices/virtio/vhost_user.c b/src/vnet/devices/virtio/vhost_user.c
new file mode 100644
index 0000000..a8a7ae8
--- /dev/null
+++ b/src/vnet/devices/virtio/vhost_user.c
@@ -0,0 +1,2242 @@
+/*
+ *------------------------------------------------------------------
+ * vhost.c - vhost-user
+ *
+ * Copyright (c) 2014-2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <fcntl.h> /* for open */
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/uio.h> /* for iovec */
+#include <netinet/in.h>
+#include <sys/vfs.h>
+
+#include <linux/if_arp.h>
+#include <linux/if_tun.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+
+#include <vnet/ip/ip.h>
+
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/devices/devices.h>
+#include <vnet/feature/feature.h>
+
+#include <vnet/devices/virtio/vhost_user.h>
+#include <vnet/devices/virtio/vhost_user_inline.h>
+
+/**
+ * @file
+ * @brief vHost User Device Driver.
+ *
+ * This file contains the source code for vHost User interface.
+ */
+
+
+vlib_node_registration_t vhost_user_send_interrupt_node;
+
+/* *INDENT-OFF* */
+vhost_user_main_t vhost_user_main = {
+ .mtu_bytes = 1518,
+};
+
+VNET_HW_INTERFACE_CLASS (vhost_interface_class, static) = {
+ .name = "vhost-user",
+};
+/* *INDENT-ON* */
+
+static long
+get_huge_page_size (int fd)
+{
+ struct statfs s;
+ fstatfs (fd, &s);
+ return s.f_bsize;
+}
+
+static void
+unmap_all_mem_regions (vhost_user_intf_t * vui)
+{
+ int i, r;
+ for (i = 0; i < vui->nregions; i++)
+ {
+ if (vui->region_mmap_addr[i] != MAP_FAILED)
+ {
+
+ long page_sz = get_huge_page_size (vui->region_mmap_fd[i]);
+
+ ssize_t map_sz = (vui->regions[i].memory_size +
+ vui->regions[i].mmap_offset +
+ page_sz - 1) & ~(page_sz - 1);
+
+ r =
+ munmap (vui->region_mmap_addr[i] - vui->regions[i].mmap_offset,
+ map_sz);
+
+ DBG_SOCK
+ ("unmap memory region %d addr 0x%lx len 0x%lx page_sz 0x%x", i,
+ vui->region_mmap_addr[i], map_sz, page_sz);
+
+ vui->region_mmap_addr[i] = MAP_FAILED;
+
+ if (r == -1)
+ {
+ clib_warning ("failed to unmap memory region (errno %d)",
+ errno);
+ }
+ close (vui->region_mmap_fd[i]);
+ }
+ }
+ vui->nregions = 0;
+}
+
+static void
+vhost_user_tx_thread_placement (vhost_user_intf_t * vui)
+{
+ //Let's try to assign one queue to each thread
+ u32 qid = 0;
+ u32 thread_index = 0;
+ vui->use_tx_spinlock = 0;
+ while (1)
+ {
+ for (qid = 0; qid < VHOST_VRING_MAX_N / 2; qid++)
+ {
+ vhost_user_vring_t *rxvq = &vui->vrings[VHOST_VRING_IDX_RX (qid)];
+ if (!rxvq->started || !rxvq->enabled)
+ continue;
+
+ vui->per_cpu_tx_qid[thread_index] = qid;
+ thread_index++;
+ if (thread_index == vlib_get_thread_main ()->n_vlib_mains)
+ return;
+ }
+ //We need to loop, meaning the spinlock has to be used
+ vui->use_tx_spinlock = 1;
+ if (thread_index == 0)
+ {
+ //Could not find a single valid one
+ for (thread_index = 0;
+ thread_index < vlib_get_thread_main ()->n_vlib_mains;
+ thread_index++)
+ {
+ vui->per_cpu_tx_qid[thread_index] = 0;
+ }
+ return;
+ }
+ }
+}
+
+/**
+ * @brief Unassign existing interface/queue to thread mappings and re-assign
+ * new interface/queue to thread mappings
+ */
+static void
+vhost_user_rx_thread_placement ()
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_user_intf_t *vui;
+ vhost_user_vring_t *txvq;
+ vnet_main_t *vnm = vnet_get_main ();
+ u32 qid;
+ int rv;
+ u16 *queue;
+
+ // Scrap all existing mappings for all interfaces/queues
+ /* *INDENT-OFF* */
+ pool_foreach (vui, vum->vhost_user_interfaces, {
+ vec_foreach (queue, vui->rx_queues)
+ {
+ rv = vnet_hw_interface_unassign_rx_thread (vnm, vui->hw_if_index,
+ *queue);
+ if (rv)
+ clib_warning ("Warning: unable to unassign interface %d, "
+ "queue %d: rc=%d", vui->hw_if_index, *queue, rv);
+ }
+ vec_reset_length (vui->rx_queues);
+ });
+ /* *INDENT-ON* */
+
+ // Create the rx_queues for all interfaces
+ /* *INDENT-OFF* */
+ pool_foreach (vui, vum->vhost_user_interfaces, {
+ for (qid = 0; qid < VHOST_VRING_MAX_N / 2; qid++)
+ {
+ txvq = &vui->vrings[VHOST_VRING_IDX_TX (qid)];
+ if (txvq->started)
+ {
+ if (txvq->mode == VNET_HW_INTERFACE_RX_MODE_UNKNOWN)
+ /* Set polling as the default */
+ txvq->mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
+ vec_add1 (vui->rx_queues, qid);
+ }
+ }
+ });
+ /* *INDENT-ON* */
+
+ // Assign new mappings for all interfaces/queues
+ /* *INDENT-OFF* */
+ pool_foreach (vui, vum->vhost_user_interfaces, {
+ vnet_hw_interface_set_input_node (vnm, vui->hw_if_index,
+ vhost_user_input_node.index);
+ vec_foreach (queue, vui->rx_queues)
+ {
+ vnet_hw_interface_assign_rx_thread (vnm, vui->hw_if_index, *queue,
+ ~0);
+ txvq = &vui->vrings[VHOST_VRING_IDX_TX (*queue)];
+ rv = vnet_hw_interface_set_rx_mode (vnm, vui->hw_if_index, *queue,
+ txvq->mode);
+ if (rv)
+ clib_warning ("Warning: unable to set rx mode for interface %d, "
+ "queue %d: rc=%d", vui->hw_if_index, *queue, rv);
+ }
+ });
+ /* *INDENT-ON* */
+}
+
+/** @brief Returns whether at least one TX and one RX vring are enabled */
+static_always_inline int
+vhost_user_intf_ready (vhost_user_intf_t * vui)
+{
+ int i, found[2] = { }; //RX + TX
+
+ for (i = 0; i < VHOST_VRING_MAX_N; i++)
+ if (vui->vrings[i].started && vui->vrings[i].enabled)
+ found[i & 1] = 1;
+
+ return found[0] && found[1];
+}
+
+static void
+vhost_user_update_iface_state (vhost_user_intf_t * vui)
+{
+ /* if we have pointers to descriptor table, go up */
+ int is_up = vhost_user_intf_ready (vui);
+ if (is_up != vui->is_up)
+ {
+ DBG_SOCK ("interface %d %s", vui->sw_if_index,
+ is_up ? "ready" : "down");
+ vnet_hw_interface_set_flags (vnet_get_main (), vui->hw_if_index,
+ is_up ? VNET_HW_INTERFACE_FLAG_LINK_UP :
+ 0);
+ vui->is_up = is_up;
+ }
+ vhost_user_rx_thread_placement ();
+ vhost_user_tx_thread_placement (vui);
+}
+
+static void
+vhost_user_set_interrupt_pending (vhost_user_intf_t * vui, u32 ifq)
+{
+ u32 qid;
+ vnet_main_t *vnm = vnet_get_main ();
+
+ qid = ifq & 0xff;
+ if ((qid & 1) == 0)
+ /* Only care about the odd number, or TX, virtqueue */
+ return;
+
+ if (vhost_user_intf_ready (vui))
+ // qid >> 1 is to convert virtqueue number to vring queue index
+ vnet_device_input_set_interrupt_pending (vnm, vui->hw_if_index, qid >> 1);
+}
+
+static clib_error_t *
+vhost_user_callfd_read_ready (clib_file_t * uf)
+{
+ __attribute__ ((unused)) int n;
+ u8 buff[8];
+
+ n = read (uf->file_descriptor, ((char *) &buff), 8);
+
+ return 0;
+}
+
+static clib_error_t *
+vhost_user_kickfd_read_ready (clib_file_t * uf)
+{
+ __attribute__ ((unused)) int n;
+ u8 buff[8];
+ vhost_user_intf_t *vui =
+ pool_elt_at_index (vhost_user_main.vhost_user_interfaces,
+ uf->private_data >> 8);
+ u32 qid = uf->private_data & 0xff;
+
+ n = read (uf->file_descriptor, ((char *) &buff), 8);
+ DBG_SOCK ("if %d KICK queue %d", uf->private_data >> 8, qid);
+ if (!vui->vrings[qid].started ||
+ (vhost_user_intf_ready (vui) != vui->is_up))
+ {
+ vlib_worker_thread_barrier_sync (vlib_get_main ());
+ vui->vrings[qid].started = 1;
+ vhost_user_update_iface_state (vui);
+ vlib_worker_thread_barrier_release (vlib_get_main ());
+ }
+
+ vhost_user_set_interrupt_pending (vui, uf->private_data);
+ return 0;
+}
+
+static_always_inline void
+vhost_user_vring_init (vhost_user_intf_t * vui, u32 qid)
+{
+ vhost_user_vring_t *vring = &vui->vrings[qid];
+ memset (vring, 0, sizeof (*vring));
+ vring->kickfd_idx = ~0;
+ vring->callfd_idx = ~0;
+ vring->errfd = -1;
+
+ /*
+ * We have a bug with some qemu 2.5, and this may be a fix.
+ * Feel like interpretation holy text, but this is from vhost-user.txt.
+ * "
+ * One queue pair is enabled initially. More queues are enabled
+ * dynamically, by sending message VHOST_USER_SET_VRING_ENABLE.
+ * "
+ * Don't know who's right, but this is what DPDK does.
+ */
+ if (qid == 0 || qid == 1)
+ vring->enabled = 1;
+}
+
+static_always_inline void
+vhost_user_vring_close (vhost_user_intf_t * vui, u32 qid)
+{
+ vhost_user_vring_t *vring = &vui->vrings[qid];
+ if (vring->kickfd_idx != ~0)
+ {
+ clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
+ vring->kickfd_idx);
+ clib_file_del (&file_main, uf);
+ vring->kickfd_idx = ~0;
+ }
+ if (vring->callfd_idx != ~0)
+ {
+ clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
+ vring->callfd_idx);
+ clib_file_del (&file_main, uf);
+ vring->callfd_idx = ~0;
+ }
+ if (vring->errfd != -1)
+ {
+ close (vring->errfd);
+ vring->errfd = -1;
+ }
+ vhost_user_vring_init (vui, qid);
+}
+
+static_always_inline void
+vhost_user_if_disconnect (vhost_user_intf_t * vui)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ int q;
+
+ vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
+
+ if (vui->clib_file_index != ~0)
+ {
+ clib_file_del (&file_main, file_main.file_pool + vui->clib_file_index);
+ vui->clib_file_index = ~0;
+ }
+
+ vui->is_up = 0;
+
+ for (q = 0; q < VHOST_VRING_MAX_N; q++)
+ vhost_user_vring_close (vui, q);
+
+ unmap_all_mem_regions (vui);
+ DBG_SOCK ("interface ifindex %d disconnected", vui->sw_if_index);
+}
+
+static clib_error_t *
+vhost_user_socket_read (clib_file_t * uf)
+{
+ int n, i;
+ int fd, number_of_fds = 0;
+ int fds[VHOST_MEMORY_MAX_NREGIONS];
+ vhost_user_msg_t msg;
+ struct msghdr mh;
+ struct iovec iov[1];
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_user_intf_t *vui;
+ struct cmsghdr *cmsg;
+ u8 q;
+ clib_file_t template = { 0 };
+ vnet_main_t *vnm = vnet_get_main ();
+
+ vui = pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data);
+
+ char control[CMSG_SPACE (VHOST_MEMORY_MAX_NREGIONS * sizeof (int))];
+
+ memset (&mh, 0, sizeof (mh));
+ memset (control, 0, sizeof (control));
+
+ for (i = 0; i < VHOST_MEMORY_MAX_NREGIONS; i++)
+ fds[i] = -1;
+
+ /* set the payload */
+ iov[0].iov_base = (void *) &msg;
+ iov[0].iov_len = VHOST_USER_MSG_HDR_SZ;
+
+ mh.msg_iov = iov;
+ mh.msg_iovlen = 1;
+ mh.msg_control = control;
+ mh.msg_controllen = sizeof (control);
+
+ n = recvmsg (uf->file_descriptor, &mh, 0);
+
+ /* Stop workers to avoid end of the world */
+ vlib_worker_thread_barrier_sync (vlib_get_main ());
+
+ if (n != VHOST_USER_MSG_HDR_SZ)
+ {
+ if (n == -1)
+ {
+ DBG_SOCK ("recvmsg returned error %d %s", errno, strerror (errno));
+ }
+ else
+ {
+ DBG_SOCK ("n (%d) != VHOST_USER_MSG_HDR_SZ (%d)",
+ n, VHOST_USER_MSG_HDR_SZ);
+ }
+ goto close_socket;
+ }
+
+ if (mh.msg_flags & MSG_CTRUNC)
+ {
+ DBG_SOCK ("MSG_CTRUNC is set");
+ goto close_socket;
+ }
+
+ cmsg = CMSG_FIRSTHDR (&mh);
+
+ if (cmsg && (cmsg->cmsg_len > 0) && (cmsg->cmsg_level == SOL_SOCKET) &&
+ (cmsg->cmsg_type == SCM_RIGHTS) &&
+ (cmsg->cmsg_len - CMSG_LEN (0) <=
+ VHOST_MEMORY_MAX_NREGIONS * sizeof (int)))
+ {
+ number_of_fds = (cmsg->cmsg_len - CMSG_LEN (0)) / sizeof (int);
+ clib_memcpy (fds, CMSG_DATA (cmsg), number_of_fds * sizeof (int));
+ }
+
+ /* version 1, no reply bit set */
+ if ((msg.flags & 7) != 1)
+ {
+ DBG_SOCK ("malformed message received. closing socket");
+ goto close_socket;
+ }
+
+ {
+ int rv;
+ rv =
+ read (uf->file_descriptor, ((char *) &msg) + VHOST_USER_MSG_HDR_SZ,
+ msg.size);
+ if (rv < 0)
+ {
+ DBG_SOCK ("read failed %s", strerror (errno));
+ goto close_socket;
+ }
+ else if (rv != msg.size)
+ {
+ DBG_SOCK ("message too short (read %dB should be %dB)", rv, msg.size);
+ goto close_socket;
+ }
+ }
+
+ switch (msg.request)
+ {
+ case VHOST_USER_GET_FEATURES:
+ msg.flags |= 4;
+ msg.u64 = (1ULL << FEAT_VIRTIO_NET_F_MRG_RXBUF) |
+ (1ULL << FEAT_VIRTIO_NET_F_CTRL_VQ) |
+ (1ULL << FEAT_VIRTIO_F_ANY_LAYOUT) |
+ (1ULL << FEAT_VIRTIO_F_INDIRECT_DESC) |
+ (1ULL << FEAT_VHOST_F_LOG_ALL) |
+ (1ULL << FEAT_VIRTIO_NET_F_GUEST_ANNOUNCE) |
+ (1ULL << FEAT_VIRTIO_NET_F_MQ) |
+ (1ULL << FEAT_VHOST_USER_F_PROTOCOL_FEATURES) |
+ (1ULL << FEAT_VIRTIO_F_VERSION_1);
+ msg.u64 &= vui->feature_mask;
+ msg.size = sizeof (msg.u64);
+ DBG_SOCK ("if %d msg VHOST_USER_GET_FEATURES - reply 0x%016llx",
+ vui->hw_if_index, msg.u64);
+ break;
+
+ case VHOST_USER_SET_FEATURES:
+ DBG_SOCK ("if %d msg VHOST_USER_SET_FEATURES features 0x%016llx",
+ vui->hw_if_index, msg.u64);
+
+ vui->features = msg.u64;
+
+ if (vui->features &
+ ((1 << FEAT_VIRTIO_NET_F_MRG_RXBUF) |
+ (1ULL << FEAT_VIRTIO_F_VERSION_1)))
+ vui->virtio_net_hdr_sz = 12;
+ else
+ vui->virtio_net_hdr_sz = 10;
+
+ vui->is_any_layout =
+ (vui->features & (1 << FEAT_VIRTIO_F_ANY_LAYOUT)) ? 1 : 0;
+
+ ASSERT (vui->virtio_net_hdr_sz < VLIB_BUFFER_PRE_DATA_SIZE);
+ vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
+ vui->is_up = 0;
+
+ /*for (q = 0; q < VHOST_VRING_MAX_N; q++)
+ vhost_user_vring_close(&vui->vrings[q]); */
+
+ break;
+
+ case VHOST_USER_SET_MEM_TABLE:
+ DBG_SOCK ("if %d msg VHOST_USER_SET_MEM_TABLE nregions %d",
+ vui->hw_if_index, msg.memory.nregions);
+
+ if ((msg.memory.nregions < 1) ||
+ (msg.memory.nregions > VHOST_MEMORY_MAX_NREGIONS))
+ {
+
+ DBG_SOCK ("number of mem regions must be between 1 and %i",
+ VHOST_MEMORY_MAX_NREGIONS);
+
+ goto close_socket;
+ }
+
+ if (msg.memory.nregions != number_of_fds)
+ {
+ DBG_SOCK ("each memory region must have FD");
+ goto close_socket;
+ }
+ unmap_all_mem_regions (vui);
+ for (i = 0; i < msg.memory.nregions; i++)
+ {
+ clib_memcpy (&(vui->regions[i]), &msg.memory.regions[i],
+ sizeof (vhost_user_memory_region_t));
+
+ long page_sz = get_huge_page_size (fds[i]);
+
+ /* align size to page */
+ ssize_t map_sz = (vui->regions[i].memory_size +
+ vui->regions[i].mmap_offset +
+ page_sz - 1) & ~(page_sz - 1);
+
+ vui->region_mmap_addr[i] = mmap (0, map_sz, PROT_READ | PROT_WRITE,
+ MAP_SHARED, fds[i], 0);
+ vui->region_guest_addr_lo[i] = vui->regions[i].guest_phys_addr;
+ vui->region_guest_addr_hi[i] = vui->regions[i].guest_phys_addr +
+ vui->regions[i].memory_size;
+
+ DBG_SOCK
+ ("map memory region %d addr 0 len 0x%lx fd %d mapped 0x%lx "
+ "page_sz 0x%x", i, map_sz, fds[i], vui->region_mmap_addr[i],
+ page_sz);
+
+ if (vui->region_mmap_addr[i] == MAP_FAILED)
+ {
+ clib_warning ("failed to map memory. errno is %d", errno);
+ goto close_socket;
+ }
+ vui->region_mmap_addr[i] += vui->regions[i].mmap_offset;
+ vui->region_mmap_fd[i] = fds[i];
+
+ vui->nregions++;
+ }
+ break;
+
+ case VHOST_USER_SET_VRING_NUM:
+ DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_NUM idx %d num %d",
+ vui->hw_if_index, msg.state.index, msg.state.num);
+
+ if ((msg.state.num > 32768) || /* maximum ring size is 32768 */
+ (msg.state.num == 0) || /* it cannot be zero */
+ ((msg.state.num - 1) & msg.state.num)) /* must be power of 2 */
+ goto close_socket;
+ vui->vrings[msg.state.index].qsz_mask = msg.state.num - 1;
+ break;
+
+ case VHOST_USER_SET_VRING_ADDR:
+ DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_ADDR idx %d",
+ vui->hw_if_index, msg.state.index);
+
+ if (msg.state.index >= VHOST_VRING_MAX_N)
+ {
+ DBG_SOCK ("invalid vring index VHOST_USER_SET_VRING_ADDR:"
+ " %d >= %d", msg.state.index, VHOST_VRING_MAX_N);
+ goto close_socket;
+ }
+
+ if (msg.size < sizeof (msg.addr))
+ {
+ DBG_SOCK ("vhost message is too short (%d < %d)",
+ msg.size, sizeof (msg.addr));
+ goto close_socket;
+ }
+
+ vui->vrings[msg.state.index].desc = (vring_desc_t *)
+ map_user_mem (vui, msg.addr.desc_user_addr);
+ vui->vrings[msg.state.index].used = (vring_used_t *)
+ map_user_mem (vui, msg.addr.used_user_addr);
+ vui->vrings[msg.state.index].avail = (vring_avail_t *)
+ map_user_mem (vui, msg.addr.avail_user_addr);
+
+ if ((vui->vrings[msg.state.index].desc == NULL) ||
+ (vui->vrings[msg.state.index].used == NULL) ||
+ (vui->vrings[msg.state.index].avail == NULL))
+ {
+ DBG_SOCK ("failed to map user memory for hw_if_index %d",
+ vui->hw_if_index);
+ goto close_socket;
+ }
+
+ vui->vrings[msg.state.index].log_guest_addr = msg.addr.log_guest_addr;
+ vui->vrings[msg.state.index].log_used =
+ (msg.addr.flags & (1 << VHOST_VRING_F_LOG)) ? 1 : 0;
+
+ /* Spec says: If VHOST_USER_F_PROTOCOL_FEATURES has not been negotiated,
+ the ring is initialized in an enabled state. */
+ if (!(vui->features & (1 << FEAT_VHOST_USER_F_PROTOCOL_FEATURES)))
+ {
+ vui->vrings[msg.state.index].enabled = 1;
+ }
+
+ vui->vrings[msg.state.index].last_used_idx =
+ vui->vrings[msg.state.index].last_avail_idx =
+ vui->vrings[msg.state.index].used->idx;
+
+ /* tell driver that we don't want interrupts */
+ vui->vrings[msg.state.index].used->flags = VRING_USED_F_NO_NOTIFY;
+ break;
+
+ case VHOST_USER_SET_OWNER:
+ DBG_SOCK ("if %d msg VHOST_USER_SET_OWNER", vui->hw_if_index);
+ break;
+
+ case VHOST_USER_RESET_OWNER:
+ DBG_SOCK ("if %d msg VHOST_USER_RESET_OWNER", vui->hw_if_index);
+ break;
+
+ case VHOST_USER_SET_VRING_CALL:
+ DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_CALL %d",
+ vui->hw_if_index, msg.u64);
+
+ q = (u8) (msg.u64 & 0xFF);
+
+ /* if there is old fd, delete and close it */
+ if (vui->vrings[q].callfd_idx != ~0)
+ {
+ clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
+ vui->vrings[q].callfd_idx);
+ clib_file_del (&file_main, uf);
+ vui->vrings[q].callfd_idx = ~0;
+ }
+
+ if (!(msg.u64 & VHOST_USER_VRING_NOFD_MASK))
+ {
+ if (number_of_fds != 1)
+ {
+ DBG_SOCK ("More than one fd received !");
+ goto close_socket;
+ }
+
+ template.read_function = vhost_user_callfd_read_ready;
+ template.file_descriptor = fds[0];
+ template.private_data =
+ ((vui - vhost_user_main.vhost_user_interfaces) << 8) + q;
+ vui->vrings[q].callfd_idx = clib_file_add (&file_main, &template);
+ }
+ else
+ vui->vrings[q].callfd_idx = ~0;
+ break;
+
+ case VHOST_USER_SET_VRING_KICK:
+ DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_KICK %d",
+ vui->hw_if_index, msg.u64);
+
+ q = (u8) (msg.u64 & 0xFF);
+
+ if (vui->vrings[q].kickfd_idx != ~0)
+ {
+ clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
+ vui->vrings[q].kickfd_idx);
+ clib_file_del (&file_main, uf);
+ vui->vrings[q].kickfd_idx = ~0;
+ }
+
+ if (!(msg.u64 & VHOST_USER_VRING_NOFD_MASK))
+ {
+ if (number_of_fds != 1)
+ {
+ DBG_SOCK ("More than one fd received !");
+ goto close_socket;
+ }
+
+ template.read_function = vhost_user_kickfd_read_ready;
+ template.file_descriptor = fds[0];
+ template.private_data =
+ (((uword) (vui - vhost_user_main.vhost_user_interfaces)) << 8) +
+ q;
+ vui->vrings[q].kickfd_idx = clib_file_add (&file_main, &template);
+ }
+ else
+ {
+ //When no kickfd is set, the queue is initialized as started
+ vui->vrings[q].kickfd_idx = ~0;
+ vui->vrings[q].started = 1;
+ }
+
+ break;
+
+ case VHOST_USER_SET_VRING_ERR:
+ DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_ERR %d",
+ vui->hw_if_index, msg.u64);
+
+ q = (u8) (msg.u64 & 0xFF);
+
+ if (vui->vrings[q].errfd != -1)
+ close (vui->vrings[q].errfd);
+
+ if (!(msg.u64 & VHOST_USER_VRING_NOFD_MASK))
+ {
+ if (number_of_fds != 1)
+ goto close_socket;
+
+ vui->vrings[q].errfd = fds[0];
+ }
+ else
+ vui->vrings[q].errfd = -1;
+
+ break;
+
+ case VHOST_USER_SET_VRING_BASE:
+ DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_BASE idx %d num %d",
+ vui->hw_if_index, msg.state.index, msg.state.num);
+
+ vui->vrings[msg.state.index].last_avail_idx = msg.state.num;
+ break;
+
+ case VHOST_USER_GET_VRING_BASE:
+ if (msg.state.index >= VHOST_VRING_MAX_N)
+ {
+ DBG_SOCK ("invalid vring index VHOST_USER_GET_VRING_BASE:"
+ " %d >= %d", msg.state.index, VHOST_VRING_MAX_N);
+ goto close_socket;
+ }
+
+ /*
+ * Copy last_avail_idx from the vring before closing it because
+ * closing the vring also initializes the vring last_avail_idx
+ */
+ msg.state.num = vui->vrings[msg.state.index].last_avail_idx;
+ msg.flags |= 4;
+ msg.size = sizeof (msg.state);
+
+ /* Spec says: Client must [...] stop ring upon receiving VHOST_USER_GET_VRING_BASE. */
+ vhost_user_vring_close (vui, msg.state.index);
+ DBG_SOCK ("if %d msg VHOST_USER_GET_VRING_BASE idx %d num %d",
+ vui->hw_if_index, msg.state.index, msg.state.num);
+ break;
+
+ case VHOST_USER_NONE:
+ DBG_SOCK ("if %d msg VHOST_USER_NONE", vui->hw_if_index);
+
+ break;
+
+ case VHOST_USER_SET_LOG_BASE:
+ {
+ DBG_SOCK ("if %d msg VHOST_USER_SET_LOG_BASE", vui->hw_if_index);
+
+ if (msg.size != sizeof (msg.log))
+ {
+ DBG_SOCK
+ ("invalid msg size for VHOST_USER_SET_LOG_BASE: %d instead of %d",
+ msg.size, sizeof (msg.log));
+ goto close_socket;
+ }
+
+ if (!
+ (vui->protocol_features & (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD)))
+ {
+ DBG_SOCK
+ ("VHOST_USER_PROTOCOL_F_LOG_SHMFD not set but VHOST_USER_SET_LOG_BASE received");
+ goto close_socket;
+ }
+
+ fd = fds[0];
+ /* align size to page */
+ long page_sz = get_huge_page_size (fd);
+ ssize_t map_sz =
+ (msg.log.size + msg.log.offset + page_sz - 1) & ~(page_sz - 1);
+
+ vui->log_base_addr = mmap (0, map_sz, PROT_READ | PROT_WRITE,
+ MAP_SHARED, fd, 0);
+
+ DBG_SOCK
+ ("map log region addr 0 len 0x%lx off 0x%lx fd %d mapped 0x%lx",
+ map_sz, msg.log.offset, fd, vui->log_base_addr);
+
+ if (vui->log_base_addr == MAP_FAILED)
+ {
+ clib_warning ("failed to map memory. errno is %d", errno);
+ goto close_socket;
+ }
+
+ vui->log_base_addr += msg.log.offset;
+ vui->log_size = msg.log.size;
+
+ msg.flags |= 4;
+ msg.size = sizeof (msg.u64);
+
+ break;
+ }
+
+ case VHOST_USER_SET_LOG_FD:
+ DBG_SOCK ("if %d msg VHOST_USER_SET_LOG_FD", vui->hw_if_index);
+
+ break;
+
+ case VHOST_USER_GET_PROTOCOL_FEATURES:
+ msg.flags |= 4;
+ msg.u64 = (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD) |
+ (1 << VHOST_USER_PROTOCOL_F_MQ);
+ msg.size = sizeof (msg.u64);
+ DBG_SOCK
+ ("if %d msg VHOST_USER_GET_PROTOCOL_FEATURES - reply 0x%016llx",
+ vui->hw_if_index, msg.u64);
+ break;
+
+ case VHOST_USER_SET_PROTOCOL_FEATURES:
+ DBG_SOCK
+ ("if %d msg VHOST_USER_SET_PROTOCOL_FEATURES features 0x%016llx",
+ vui->hw_if_index, msg.u64);
+
+ vui->protocol_features = msg.u64;
+
+ break;
+
+ case VHOST_USER_GET_QUEUE_NUM:
+ msg.flags |= 4;
+ msg.u64 = VHOST_VRING_MAX_N;
+ msg.size = sizeof (msg.u64);
+ DBG_SOCK ("if %d msg VHOST_USER_GET_QUEUE_NUM - reply %d",
+ vui->hw_if_index, msg.u64);
+ break;
+
+ case VHOST_USER_SET_VRING_ENABLE:
+ DBG_SOCK ("if %d VHOST_USER_SET_VRING_ENABLE: %s queue %d",
+ vui->hw_if_index, msg.state.num ? "enable" : "disable",
+ msg.state.index);
+ if (msg.state.index >= VHOST_VRING_MAX_N)
+ {
+ DBG_SOCK ("invalid vring index VHOST_USER_SET_VRING_ENABLE:"
+ " %d >= %d", msg.state.index, VHOST_VRING_MAX_N);
+ goto close_socket;
+ }
+
+ vui->vrings[msg.state.index].enabled = msg.state.num;
+ break;
+
+ default:
+ DBG_SOCK ("unknown vhost-user message %d received. closing socket",
+ msg.request);
+ goto close_socket;
+ }
+
+ /* if we need to reply */
+ if (msg.flags & 4)
+ {
+ n =
+ send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
+ if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
+ {
+ DBG_SOCK ("could not send message response");
+ goto close_socket;
+ }
+ }
+
+ vhost_user_update_iface_state (vui);
+ vlib_worker_thread_barrier_release (vlib_get_main ());
+ return 0;
+
+close_socket:
+ vhost_user_if_disconnect (vui);
+ vhost_user_update_iface_state (vui);
+ vlib_worker_thread_barrier_release (vlib_get_main ());
+ return 0;
+}
+
+static clib_error_t *
+vhost_user_socket_error (clib_file_t * uf)
+{
+ vlib_main_t *vm = vlib_get_main ();
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_user_intf_t *vui =
+ pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data);
+
+ DBG_SOCK ("socket error on if %d", vui->sw_if_index);
+ vlib_worker_thread_barrier_sync (vm);
+ vhost_user_if_disconnect (vui);
+ vhost_user_rx_thread_placement ();
+ vlib_worker_thread_barrier_release (vm);
+ return 0;
+}
+
+static clib_error_t *
+vhost_user_socksvr_accept_ready (clib_file_t * uf)
+{
+ int client_fd, client_len;
+ struct sockaddr_un client;
+ clib_file_t template = { 0 };
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_user_intf_t *vui;
+
+ vui = pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data);
+
+ client_len = sizeof (client);
+ client_fd = accept (uf->file_descriptor,
+ (struct sockaddr *) &client,
+ (socklen_t *) & client_len);
+
+ if (client_fd < 0)
+ return clib_error_return_unix (0, "accept");
+
+ if (vui->clib_file_index != ~0)
+ {
+ DBG_SOCK ("Close client socket for vhost interface %d, fd %d",
+ vui->sw_if_index, UNIX_GET_FD (vui->clib_file_index));
+ clib_file_del (&file_main, file_main.file_pool + vui->clib_file_index);
+ }
+
+ DBG_SOCK ("New client socket for vhost interface %d, fd %d",
+ vui->sw_if_index, client_fd);
+ template.read_function = vhost_user_socket_read;
+ template.error_function = vhost_user_socket_error;
+ template.file_descriptor = client_fd;
+ template.private_data = vui - vhost_user_main.vhost_user_interfaces;
+ vui->clib_file_index = clib_file_add (&file_main, &template);
+ return 0;
+}
+
+static clib_error_t *
+vhost_user_init (vlib_main_t * vm)
+{
+ clib_error_t *error;
+ vhost_user_main_t *vum = &vhost_user_main;
+ vlib_thread_main_t *tm = vlib_get_thread_main ();
+
+ error = vlib_call_init_function (vm, ip4_init);
+ if (error)
+ return error;
+
+ vum->coalesce_frames = 32;
+ vum->coalesce_time = 1e-3;
+
+ vec_validate (vum->cpus, tm->n_vlib_mains - 1);
+
+ vhost_cpu_t *cpu;
+ vec_foreach (cpu, vum->cpus)
+ {
+ /* This is actually not necessary as validate already zeroes it
+ * Just keeping the loop here for later because I am lazy. */
+ cpu->rx_buffers_len = 0;
+ }
+
+ vum->random = random_default_seed ();
+
+ mhash_init_c_string (&vum->if_index_by_sock_name, sizeof (uword));
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (vhost_user_init);
+
+static uword
+vhost_user_send_interrupt_process (vlib_main_t * vm,
+ vlib_node_runtime_t * rt, vlib_frame_t * f)
+{
+ vhost_user_intf_t *vui;
+ f64 timeout = 3153600000.0 /* 100 years */ ;
+ uword event_type, *event_data = 0;
+ vhost_user_main_t *vum = &vhost_user_main;
+ u16 *queue;
+ f64 now, poll_time_remaining;
+ f64 next_timeout;
+ u8 stop_timer = 0;
+
+ while (1)
+ {
+ poll_time_remaining =
+ vlib_process_wait_for_event_or_clock (vm, timeout);
+ event_type = vlib_process_get_events (vm, &event_data);
+ vec_reset_length (event_data);
+
+ /*
+ * Use the remaining timeout if it is less than coalesce time to avoid
+ * resetting the existing timer in the middle of expiration
+ */
+ timeout = poll_time_remaining;
+ if (vlib_process_suspend_time_is_zero (timeout) ||
+ (timeout > vum->coalesce_time))
+ timeout = vum->coalesce_time;
+
+ now = vlib_time_now (vm);
+ switch (event_type)
+ {
+ case VHOST_USER_EVENT_STOP_TIMER:
+ stop_timer = 1;
+ break;
+
+ case VHOST_USER_EVENT_START_TIMER:
+ stop_timer = 0;
+ if (!vlib_process_suspend_time_is_zero (poll_time_remaining))
+ break;
+ /* fall through */
+
+ case ~0:
+ /* *INDENT-OFF* */
+ pool_foreach (vui, vum->vhost_user_interfaces, {
+ next_timeout = timeout;
+ vec_foreach (queue, vui->rx_queues)
+ {
+ vhost_user_vring_t *rxvq =
+ &vui->vrings[VHOST_VRING_IDX_RX (*queue)];
+ vhost_user_vring_t *txvq =
+ &vui->vrings[VHOST_VRING_IDX_TX (*queue)];
+
+ if (txvq->n_since_last_int)
+ {
+ if (now >= txvq->int_deadline)
+ vhost_user_send_call (vm, txvq);
+ else
+ next_timeout = txvq->int_deadline - now;
+ }
+
+ if (rxvq->n_since_last_int)
+ {
+ if (now >= rxvq->int_deadline)
+ vhost_user_send_call (vm, rxvq);
+ else
+ next_timeout = rxvq->int_deadline - now;
+ }
+
+ if ((next_timeout < timeout) && (next_timeout > 0.0))
+ timeout = next_timeout;
+ }
+ });
+ /* *INDENT-ON* */
+ break;
+
+ default:
+ clib_warning ("BUG: unhandled event type %d", event_type);
+ break;
+ }
+ /* No less than 1 millisecond */
+ if (timeout < 1e-3)
+ timeout = 1e-3;
+ if (stop_timer)
+ timeout = 3153600000.0;
+ }
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (vhost_user_send_interrupt_node) = {
+ .function = vhost_user_send_interrupt_process,
+ .type = VLIB_NODE_TYPE_PROCESS,
+ .name = "vhost-user-send-interrupt-process",
+};
+/* *INDENT-ON* */
+
+static uword
+vhost_user_process (vlib_main_t * vm,
+ vlib_node_runtime_t * rt, vlib_frame_t * f)
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_user_intf_t *vui;
+ struct sockaddr_un sun;
+ int sockfd;
+ clib_file_t template = { 0 };
+ f64 timeout = 3153600000.0 /* 100 years */ ;
+ uword *event_data = 0;
+
+ sockfd = -1;
+ sun.sun_family = AF_UNIX;
+ template.read_function = vhost_user_socket_read;
+ template.error_function = vhost_user_socket_error;
+
+ while (1)
+ {
+ vlib_process_wait_for_event_or_clock (vm, timeout);
+ vlib_process_get_events (vm, &event_data);
+ vec_reset_length (event_data);
+
+ timeout = 3.0;
+
+ /* *INDENT-OFF* */
+ pool_foreach (vui, vum->vhost_user_interfaces, {
+
+ if (vui->unix_server_index == ~0) { //Nothing to do for server sockets
+ if (vui->clib_file_index == ~0)
+ {
+ if ((sockfd < 0) &&
+ ((sockfd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0))
+ {
+ /*
+ * 1st time error or new error for this interface,
+ * spit out the message and record the error
+ */
+ if (!vui->sock_errno || (vui->sock_errno != errno))
+ {
+ clib_unix_warning
+ ("Error: Could not open unix socket for %s",
+ vui->sock_filename);
+ vui->sock_errno = errno;
+ }
+ continue;
+ }
+
+ /* try to connect */
+ strncpy (sun.sun_path, (char *) vui->sock_filename,
+ sizeof (sun.sun_path) - 1);
+
+ /* Avoid hanging VPP if the other end does not accept */
+ if (fcntl(sockfd, F_SETFL, O_NONBLOCK) < 0)
+ clib_unix_warning ("fcntl");
+
+ if (connect (sockfd, (struct sockaddr *) &sun,
+ sizeof (struct sockaddr_un)) == 0)
+ {
+ /* Set the socket to blocking as it was before */
+ if (fcntl(sockfd, F_SETFL, 0) < 0)
+ clib_unix_warning ("fcntl2");
+
+ vui->sock_errno = 0;
+ template.file_descriptor = sockfd;
+ template.private_data =
+ vui - vhost_user_main.vhost_user_interfaces;
+ vui->clib_file_index = clib_file_add (&file_main, &template);
+
+ /* This sockfd is considered consumed */
+ sockfd = -1;
+ }
+ else
+ {
+ vui->sock_errno = errno;
+ }
+ }
+ else
+ {
+ /* check if socket is alive */
+ int error = 0;
+ socklen_t len = sizeof (error);
+ int fd = UNIX_GET_FD(vui->clib_file_index);
+ int retval =
+ getsockopt (fd, SOL_SOCKET, SO_ERROR, &error, &len);
+
+ if (retval)
+ {
+ DBG_SOCK ("getsockopt returned %d", retval);
+ vhost_user_if_disconnect (vui);
+ }
+ }
+ }
+ });
+ /* *INDENT-ON* */
+ }
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (vhost_user_process_node,static) = {
+ .function = vhost_user_process,
+ .type = VLIB_NODE_TYPE_PROCESS,
+ .name = "vhost-user-process",
+};
+/* *INDENT-ON* */
+
+/**
+ * Disables and reset interface structure.
+ * It can then be either init again, or removed from used interfaces.
+ */
+static void
+vhost_user_term_if (vhost_user_intf_t * vui)
+{
+ int q;
+ vhost_user_main_t *vum = &vhost_user_main;
+
+ // disconnect interface sockets
+ vhost_user_if_disconnect (vui);
+ vhost_user_update_iface_state (vui);
+
+ for (q = 0; q < VHOST_VRING_MAX_N; q++)
+ {
+ clib_mem_free ((void *) vui->vring_locks[q]);
+ }
+
+ if (vui->unix_server_index != ~0)
+ {
+ //Close server socket
+ clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
+ vui->unix_server_index);
+ clib_file_del (&file_main, uf);
+ vui->unix_server_index = ~0;
+ unlink (vui->sock_filename);
+ }
+
+ mhash_unset (&vum->if_index_by_sock_name, vui->sock_filename,
+ &vui->if_index);
+}
+
+int
+vhost_user_delete_if (vnet_main_t * vnm, vlib_main_t * vm, u32 sw_if_index)
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_user_intf_t *vui;
+ int rv = 0;
+ vnet_hw_interface_t *hwif;
+ u16 *queue;
+
+ if (!(hwif = vnet_get_sup_hw_interface (vnm, sw_if_index)) ||
+ hwif->dev_class_index != vhost_user_device_class.index)
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ DBG_SOCK ("Deleting vhost-user interface %s (instance %d)",
+ hwif->name, hwif->dev_instance);
+
+ vui = pool_elt_at_index (vum->vhost_user_interfaces, hwif->dev_instance);
+
+ vec_foreach (queue, vui->rx_queues)
+ {
+ vhost_user_vring_t *txvq;
+
+ txvq = &vui->vrings[VHOST_VRING_IDX_TX (*queue)];
+ if ((vum->ifq_count > 0) &&
+ ((txvq->mode == VNET_HW_INTERFACE_RX_MODE_INTERRUPT) ||
+ (txvq->mode == VNET_HW_INTERFACE_RX_MODE_ADAPTIVE)))
+ {
+ vum->ifq_count--;
+ // Stop the timer if there is no more interrupt interface/queue
+ if ((vum->ifq_count == 0) &&
+ (vum->coalesce_time > 0.0) && (vum->coalesce_frames > 0))
+ {
+ vlib_process_signal_event (vm,
+ vhost_user_send_interrupt_node.index,
+ VHOST_USER_EVENT_STOP_TIMER, 0);
+ break;
+ }
+ }
+ }
+
+ // Disable and reset interface
+ vhost_user_term_if (vui);
+
+ // Reset renumbered iface
+ if (hwif->dev_instance <
+ vec_len (vum->show_dev_instance_by_real_dev_instance))
+ vum->show_dev_instance_by_real_dev_instance[hwif->dev_instance] = ~0;
+
+ // Delete ethernet interface
+ ethernet_delete_interface (vnm, vui->hw_if_index);
+
+ // Back to pool
+ pool_put (vum->vhost_user_interfaces, vui);
+
+ return rv;
+}
+
+static clib_error_t *
+vhost_user_exit (vlib_main_t * vm)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_user_intf_t *vui;
+
+ vlib_worker_thread_barrier_sync (vlib_get_main ());
+ /* *INDENT-OFF* */
+ pool_foreach (vui, vum->vhost_user_interfaces, {
+ vhost_user_delete_if (vnm, vm, vui->sw_if_index);
+ });
+ /* *INDENT-ON* */
+ vlib_worker_thread_barrier_release (vlib_get_main ());
+ return 0;
+}
+
+VLIB_MAIN_LOOP_EXIT_FUNCTION (vhost_user_exit);
+
+/**
+ * Open server unix socket on specified sock_filename.
+ */
+static int
+vhost_user_init_server_sock (const char *sock_filename, int *sock_fd)
+{
+ int rv = 0;
+ struct sockaddr_un un = { };
+ int fd;
+ /* create listening socket */
+ if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
+ return VNET_API_ERROR_SYSCALL_ERROR_1;
+
+ un.sun_family = AF_UNIX;
+ strncpy ((char *) un.sun_path, (char *) sock_filename,
+ sizeof (un.sun_path) - 1);
+
+ /* remove if exists */
+ unlink ((char *) sock_filename);
+
+ if (bind (fd, (struct sockaddr *) &un, sizeof (un)) == -1)
+ {
+ rv = VNET_API_ERROR_SYSCALL_ERROR_2;
+ goto error;
+ }
+
+ if (listen (fd, 1) == -1)
+ {
+ rv = VNET_API_ERROR_SYSCALL_ERROR_3;
+ goto error;
+ }
+
+ *sock_fd = fd;
+ return 0;
+
+error:
+ close (fd);
+ return rv;
+}
+
+/**
+ * Create ethernet interface for vhost user interface.
+ */
+static void
+vhost_user_create_ethernet (vnet_main_t * vnm, vlib_main_t * vm,
+ vhost_user_intf_t * vui, u8 * hwaddress)
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+ u8 hwaddr[6];
+ clib_error_t *error;
+
+ /* create hw and sw interface */
+ if (hwaddress)
+ {
+ clib_memcpy (hwaddr, hwaddress, 6);
+ }
+ else
+ {
+ random_u32 (&vum->random);
+ clib_memcpy (hwaddr + 2, &vum->random, sizeof (vum->random));
+ hwaddr[0] = 2;
+ hwaddr[1] = 0xfe;
+ }
+
+ error = ethernet_register_interface
+ (vnm,
+ vhost_user_device_class.index,
+ vui - vum->vhost_user_interfaces /* device instance */ ,
+ hwaddr /* ethernet address */ ,
+ &vui->hw_if_index, 0 /* flag change */ );
+
+ if (error)
+ clib_error_report (error);
+
+ vnet_sw_interface_set_mtu (vnm, vui->sw_if_index, 9000);
+}
+
+/*
+ * Initialize vui with specified attributes
+ */
+static void
+vhost_user_vui_init (vnet_main_t * vnm,
+ vhost_user_intf_t * vui,
+ int server_sock_fd,
+ const char *sock_filename,
+ u64 feature_mask, u32 * sw_if_index)
+{
+ vnet_sw_interface_t *sw;
+ int q;
+ vhost_user_main_t *vum = &vhost_user_main;
+ vnet_hw_interface_t *hw;
+
+ hw = vnet_get_hw_interface (vnm, vui->hw_if_index);
+ sw = vnet_get_hw_sw_interface (vnm, vui->hw_if_index);
+ if (server_sock_fd != -1)
+ {
+ clib_file_t template = { 0 };
+ template.read_function = vhost_user_socksvr_accept_ready;
+ template.file_descriptor = server_sock_fd;
+ template.private_data = vui - vum->vhost_user_interfaces; //hw index
+ vui->unix_server_index = clib_file_add (&file_main, &template);
+ }
+ else
+ {
+ vui->unix_server_index = ~0;
+ }
+
+ vui->sw_if_index = sw->sw_if_index;
+ strncpy (vui->sock_filename, sock_filename,
+ ARRAY_LEN (vui->sock_filename) - 1);
+ vui->sock_errno = 0;
+ vui->is_up = 0;
+ vui->feature_mask = feature_mask;
+ vui->clib_file_index = ~0;
+ vui->log_base_addr = 0;
+ vui->if_index = vui - vum->vhost_user_interfaces;
+ mhash_set_mem (&vum->if_index_by_sock_name, vui->sock_filename,
+ &vui->if_index, 0);
+
+ for (q = 0; q < VHOST_VRING_MAX_N; q++)
+ vhost_user_vring_init (vui, q);
+
+ hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
+ vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
+
+ if (sw_if_index)
+ *sw_if_index = vui->sw_if_index;
+
+ for (q = 0; q < VHOST_VRING_MAX_N; q++)
+ {
+ vui->vring_locks[q] = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
+ CLIB_CACHE_LINE_BYTES);
+ memset ((void *) vui->vring_locks[q], 0, CLIB_CACHE_LINE_BYTES);
+ }
+
+ vec_validate (vui->per_cpu_tx_qid,
+ vlib_get_thread_main ()->n_vlib_mains - 1);
+ vhost_user_tx_thread_placement (vui);
+}
+
+int
+vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm,
+ const char *sock_filename,
+ u8 is_server,
+ u32 * sw_if_index,
+ u64 feature_mask,
+ u8 renumber, u32 custom_dev_instance, u8 * hwaddr)
+{
+ vhost_user_intf_t *vui = NULL;
+ u32 sw_if_idx = ~0;
+ int rv = 0;
+ int server_sock_fd = -1;
+ vhost_user_main_t *vum = &vhost_user_main;
+ uword *if_index;
+
+ if (sock_filename == NULL || !(strlen (sock_filename) > 0))
+ {
+ return VNET_API_ERROR_INVALID_ARGUMENT;
+ }
+
+ if_index = mhash_get (&vum->if_index_by_sock_name, (void *) sock_filename);
+ if (if_index)
+ {
+ if (sw_if_index)
+ {
+ vui = &vum->vhost_user_interfaces[*if_index];
+ *sw_if_index = vui->sw_if_index;
+ }
+ return VNET_API_ERROR_IF_ALREADY_EXISTS;
+ }
+
+ if (is_server)
+ {
+ if ((rv =
+ vhost_user_init_server_sock (sock_filename, &server_sock_fd)) != 0)
+ {
+ return rv;
+ }
+ }
+
+ pool_get (vhost_user_main.vhost_user_interfaces, vui);
+
+ vhost_user_create_ethernet (vnm, vm, vui, hwaddr);
+ vhost_user_vui_init (vnm, vui, server_sock_fd, sock_filename,
+ feature_mask, &sw_if_idx);
+
+ if (renumber)
+ vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
+
+ if (sw_if_index)
+ *sw_if_index = sw_if_idx;
+
+ // Process node must connect
+ vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
+
+ return rv;
+}
+
+int
+vhost_user_modify_if (vnet_main_t * vnm, vlib_main_t * vm,
+ const char *sock_filename,
+ u8 is_server,
+ u32 sw_if_index,
+ u64 feature_mask, u8 renumber, u32 custom_dev_instance)
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_user_intf_t *vui = NULL;
+ u32 sw_if_idx = ~0;
+ int server_sock_fd = -1;
+ int rv = 0;
+ vnet_hw_interface_t *hwif;
+ uword *if_index;
+
+ if (!(hwif = vnet_get_sup_hw_interface (vnm, sw_if_index)) ||
+ hwif->dev_class_index != vhost_user_device_class.index)
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ if (sock_filename == NULL || !(strlen (sock_filename) > 0))
+ return VNET_API_ERROR_INVALID_ARGUMENT;
+
+ vui = vec_elt_at_index (vum->vhost_user_interfaces, hwif->dev_instance);
+
+ /*
+ * Disallow changing the interface to have the same path name
+ * as other interface
+ */
+ if_index = mhash_get (&vum->if_index_by_sock_name, (void *) sock_filename);
+ if (if_index && (*if_index != vui->if_index))
+ return VNET_API_ERROR_IF_ALREADY_EXISTS;
+
+ // First try to open server socket
+ if (is_server)
+ if ((rv = vhost_user_init_server_sock (sock_filename,
+ &server_sock_fd)) != 0)
+ return rv;
+
+ vhost_user_term_if (vui);
+ vhost_user_vui_init (vnm, vui, server_sock_fd,
+ sock_filename, feature_mask, &sw_if_idx);
+
+ if (renumber)
+ vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
+
+ // Process node must connect
+ vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
+
+ return rv;
+}
+
+clib_error_t *
+vhost_user_connect_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ u8 *sock_filename = NULL;
+ u32 sw_if_index;
+ u8 is_server = 0;
+ u64 feature_mask = (u64) ~ (0ULL);
+ u8 renumber = 0;
+ u32 custom_dev_instance = ~0;
+ u8 hwaddr[6];
+ u8 *hw = NULL;
+ clib_error_t *error = NULL;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "socket %s", &sock_filename))
+ ;
+ else if (unformat (line_input, "server"))
+ is_server = 1;
+ else if (unformat (line_input, "feature-mask 0x%llx", &feature_mask))
+ ;
+ else
+ if (unformat
+ (line_input, "hwaddr %U", unformat_ethernet_address, hwaddr))
+ hw = hwaddr;
+ else if (unformat (line_input, "renumber %d", &custom_dev_instance))
+ {
+ renumber = 1;
+ }
+ else
+ {
+ error = clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ vnet_main_t *vnm = vnet_get_main ();
+
+ int rv;
+ if ((rv = vhost_user_create_if (vnm, vm, (char *) sock_filename,
+ is_server, &sw_if_index, feature_mask,
+ renumber, custom_dev_instance, hw)))
+ {
+ error = clib_error_return (0, "vhost_user_create_if returned %d", rv);
+ goto done;
+ }
+
+ vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
+ sw_if_index);
+
+done:
+ vec_free (sock_filename);
+ unformat_free (line_input);
+
+ return error;
+}
+
+clib_error_t *
+vhost_user_delete_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ u32 sw_if_index = ~0;
+ vnet_main_t *vnm = vnet_get_main ();
+ clib_error_t *error = NULL;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "sw_if_index %d", &sw_if_index))
+ ;
+ else if (unformat
+ (line_input, "%U", unformat_vnet_sw_interface, vnm,
+ &sw_if_index))
+ {
+ vnet_hw_interface_t *hwif =
+ vnet_get_sup_hw_interface (vnm, sw_if_index);
+ if (hwif == NULL ||
+ vhost_user_device_class.index != hwif->dev_class_index)
+ {
+ error = clib_error_return (0, "Not a vhost interface");
+ goto done;
+ }
+ }
+ else
+ {
+ error = clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ vhost_user_delete_if (vnm, vm, sw_if_index);
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+int
+vhost_user_dump_ifs (vnet_main_t * vnm, vlib_main_t * vm,
+ vhost_user_intf_details_t ** out_vuids)
+{
+ int rv = 0;
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_user_intf_t *vui;
+ vhost_user_intf_details_t *r_vuids = NULL;
+ vhost_user_intf_details_t *vuid = NULL;
+ u32 *hw_if_indices = 0;
+ vnet_hw_interface_t *hi;
+ u8 *s = NULL;
+ int i;
+
+ if (!out_vuids)
+ return -1;
+
+ pool_foreach (vui, vum->vhost_user_interfaces,
+ vec_add1 (hw_if_indices, vui->hw_if_index);
+ );
+
+ for (i = 0; i < vec_len (hw_if_indices); i++)
+ {
+ hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
+ vui = pool_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
+
+ vec_add2 (r_vuids, vuid, 1);
+ vuid->sw_if_index = vui->sw_if_index;
+ vuid->virtio_net_hdr_sz = vui->virtio_net_hdr_sz;
+ vuid->features = vui->features;
+ vuid->num_regions = vui->nregions;
+ vuid->is_server = vui->unix_server_index != ~0;
+ vuid->sock_errno = vui->sock_errno;
+ strncpy ((char *) vuid->sock_filename, (char *) vui->sock_filename,
+ sizeof (vuid->sock_filename));
+ vuid->sock_filename[ARRAY_LEN (vuid->sock_filename) - 1] = '\0';
+ s = format (s, "%v%c", hi->name, 0);
+
+ strncpy ((char *) vuid->if_name, (char *) s,
+ ARRAY_LEN (vuid->if_name) - 1);
+ _vec_len (s) = 0;
+ }
+
+ vec_free (s);
+ vec_free (hw_if_indices);
+
+ *out_vuids = r_vuids;
+
+ return rv;
+}
+
+clib_error_t *
+show_vhost_user_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ clib_error_t *error = 0;
+ vnet_main_t *vnm = vnet_get_main ();
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_user_intf_t *vui;
+ u32 hw_if_index, *hw_if_indices = 0;
+ vnet_hw_interface_t *hi;
+ u16 *queue;
+ u32 ci;
+ int i, j, q;
+ int show_descr = 0;
+ struct feat_struct
+ {
+ u8 bit;
+ char *str;
+ };
+ struct feat_struct *feat_entry;
+
+ static struct feat_struct feat_array[] = {
+#define _(s,b) { .str = #s, .bit = b, },
+ foreach_virtio_net_feature
+#undef _
+ {.str = NULL}
+ };
+
+#define foreach_protocol_feature \
+ _(VHOST_USER_PROTOCOL_F_MQ) \
+ _(VHOST_USER_PROTOCOL_F_LOG_SHMFD)
+
+ static struct feat_struct proto_feat_array[] = {
+#define _(s) { .str = #s, .bit = s},
+ foreach_protocol_feature
+#undef _
+ {.str = NULL}
+ };
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat
+ (input, "%U", unformat_vnet_hw_interface, vnm, &hw_if_index))
+ {
+ hi = vnet_get_hw_interface (vnm, hw_if_index);
+ if (vhost_user_device_class.index != hi->dev_class_index)
+ {
+ error = clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ goto done;
+ }
+ vec_add1 (hw_if_indices, hw_if_index);
+ }
+ else if (unformat (input, "descriptors") || unformat (input, "desc"))
+ show_descr = 1;
+ else
+ {
+ error = clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ goto done;
+ }
+ }
+ if (vec_len (hw_if_indices) == 0)
+ {
+ pool_foreach (vui, vum->vhost_user_interfaces,
+ vec_add1 (hw_if_indices, vui->hw_if_index);
+ );
+ }
+ vlib_cli_output (vm, "Virtio vhost-user interfaces");
+ vlib_cli_output (vm, "Global:\n coalesce frames %d time %e",
+ vum->coalesce_frames, vum->coalesce_time);
+ vlib_cli_output (vm, " number of rx virtqueues in interrupt mode: %d",
+ vum->ifq_count);
+
+ for (i = 0; i < vec_len (hw_if_indices); i++)
+ {
+ hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
+ vui = pool_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
+ vlib_cli_output (vm, "Interface: %s (ifindex %d)",
+ hi->name, hw_if_indices[i]);
+
+ vlib_cli_output (vm, "virtio_net_hdr_sz %d\n"
+ " features mask (0x%llx): \n"
+ " features (0x%llx): \n",
+ vui->virtio_net_hdr_sz, vui->feature_mask,
+ vui->features);
+
+ feat_entry = (struct feat_struct *) &feat_array;
+ while (feat_entry->str)
+ {
+ if (vui->features & (1ULL << feat_entry->bit))
+ vlib_cli_output (vm, " %s (%d)", feat_entry->str,
+ feat_entry->bit);
+ feat_entry++;
+ }
+
+ vlib_cli_output (vm, " protocol features (0x%llx)",
+ vui->protocol_features);
+ feat_entry = (struct feat_struct *) &proto_feat_array;
+ while (feat_entry->str)
+ {
+ if (vui->protocol_features & (1ULL << feat_entry->bit))
+ vlib_cli_output (vm, " %s (%d)", feat_entry->str,
+ feat_entry->bit);
+ feat_entry++;
+ }
+
+ vlib_cli_output (vm, "\n");
+
+ vlib_cli_output (vm, " socket filename %s type %s errno \"%s\"\n\n",
+ vui->sock_filename,
+ (vui->unix_server_index != ~0) ? "server" : "client",
+ strerror (vui->sock_errno));
+
+ vlib_cli_output (vm, " rx placement: ");
+
+ vec_foreach (queue, vui->rx_queues)
+ {
+ vnet_main_t *vnm = vnet_get_main ();
+ uword thread_index;
+ vnet_hw_interface_rx_mode mode;
+
+ thread_index = vnet_get_device_input_thread_index (vnm,
+ vui->hw_if_index,
+ *queue);
+ vnet_hw_interface_get_rx_mode (vnm, vui->hw_if_index, *queue, &mode);
+ vlib_cli_output (vm, " thread %d on vring %d, %U\n",
+ thread_index, VHOST_VRING_IDX_TX (*queue),
+ format_vnet_hw_interface_rx_mode, mode);
+ }
+
+ vlib_cli_output (vm, " tx placement: %s\n",
+ vui->use_tx_spinlock ? "spin-lock" : "lock-free");
+
+ vec_foreach_index (ci, vui->per_cpu_tx_qid)
+ {
+ vlib_cli_output (vm, " thread %d on vring %d\n", ci,
+ VHOST_VRING_IDX_RX (vui->per_cpu_tx_qid[ci]));
+ }
+
+ vlib_cli_output (vm, "\n");
+
+ vlib_cli_output (vm, " Memory regions (total %d)\n", vui->nregions);
+
+ if (vui->nregions)
+ {
+ vlib_cli_output (vm,
+ " region fd guest_phys_addr memory_size userspace_addr mmap_offset mmap_addr\n");
+ vlib_cli_output (vm,
+ " ====== ===== ================== ================== ================== ================== ==================\n");
+ }
+ for (j = 0; j < vui->nregions; j++)
+ {
+ vlib_cli_output (vm,
+ " %d %-5d 0x%016lx 0x%016lx 0x%016lx 0x%016lx 0x%016lx\n",
+ j, vui->region_mmap_fd[j],
+ vui->regions[j].guest_phys_addr,
+ vui->regions[j].memory_size,
+ vui->regions[j].userspace_addr,
+ vui->regions[j].mmap_offset,
+ pointer_to_uword (vui->region_mmap_addr[j]));
+ }
+ for (q = 0; q < VHOST_VRING_MAX_N; q++)
+ {
+ if (!vui->vrings[q].started)
+ continue;
+
+ vlib_cli_output (vm, "\n Virtqueue %d (%s%s)\n", q,
+ (q & 1) ? "RX" : "TX",
+ vui->vrings[q].enabled ? "" : " disabled");
+
+ vlib_cli_output (vm,
+ " qsz %d last_avail_idx %d last_used_idx %d\n",
+ vui->vrings[q].qsz_mask + 1,
+ vui->vrings[q].last_avail_idx,
+ vui->vrings[q].last_used_idx);
+
+ if (vui->vrings[q].avail && vui->vrings[q].used)
+ vlib_cli_output (vm,
+ " avail.flags %x avail.idx %d used.flags %x used.idx %d\n",
+ vui->vrings[q].avail->flags,
+ vui->vrings[q].avail->idx,
+ vui->vrings[q].used->flags,
+ vui->vrings[q].used->idx);
+
+ int kickfd = UNIX_GET_FD (vui->vrings[q].kickfd_idx);
+ int callfd = UNIX_GET_FD (vui->vrings[q].callfd_idx);
+ vlib_cli_output (vm, " kickfd %d callfd %d errfd %d\n",
+ kickfd, callfd, vui->vrings[q].errfd);
+
+ if (show_descr)
+ {
+ vlib_cli_output (vm, "\n descriptor table:\n");
+ vlib_cli_output (vm,
+ " id addr len flags next user_addr\n");
+ vlib_cli_output (vm,
+ " ===== ================== ===== ====== ===== ==================\n");
+ for (j = 0; j < vui->vrings[q].qsz_mask + 1; j++)
+ {
+ u32 mem_hint = 0;
+ vlib_cli_output (vm,
+ " %-5d 0x%016lx %-5d 0x%04x %-5d 0x%016lx\n",
+ j, vui->vrings[q].desc[j].addr,
+ vui->vrings[q].desc[j].len,
+ vui->vrings[q].desc[j].flags,
+ vui->vrings[q].desc[j].next,
+ pointer_to_uword (map_guest_mem
+ (vui,
+ vui->vrings[q].desc[j].
+ addr, &mem_hint)));
+ }
+ }
+ }
+ vlib_cli_output (vm, "\n");
+ }
+done:
+ vec_free (hw_if_indices);
+ return error;
+}
+
+/*
+ * CLI functions
+ */
+
+/*?
+ * Create a vHost User interface. Once created, a new virtual interface
+ * will exist with the name '<em>VirtualEthernet0/0/x</em>', where '<em>x</em>'
+ * is the next free index.
+ *
+ * There are several parameters associated with a vHost interface:
+ *
+ * - <b>socket <socket-filename></b> - Name of the linux socket used by hypervisor
+ * and VPP to manage the vHost interface. If in '<em>server</em>' mode, VPP will
+ * create the socket if it does not already exist. If in '<em>client</em>' mode,
+ * hypervisor will create the socket if it does not already exist. The VPP code
+ * is indifferent to the file location. However, if SELinux is enabled, then the
+ * socket needs to be created in '<em>/var/run/vpp/</em>'.
+ *
+ * - <b>server</b> - Optional flag to indicate that VPP should be the server for
+ * the linux socket. If not provided, VPP will be the client. In '<em>server</em>'
+ * mode, the VM can be reset without tearing down the vHost Interface. In
+ * '<em>client</em>' mode, VPP can be reset without bringing down the VM and
+ * tearing down the vHost Interface.
+ *
+ * - <b>feature-mask <hex></b> - Optional virtio/vhost feature set negotiated at
+ * startup. <b>This is intended for degugging only.</b> It is recommended that this
+ * parameter not be used except by experienced users. By default, all supported
+ * features will be advertised. Otherwise, provide the set of features desired.
+ * - 0x000008000 (15) - VIRTIO_NET_F_MRG_RXBUF
+ * - 0x000020000 (17) - VIRTIO_NET_F_CTRL_VQ
+ * - 0x000200000 (21) - VIRTIO_NET_F_GUEST_ANNOUNCE
+ * - 0x000400000 (22) - VIRTIO_NET_F_MQ
+ * - 0x004000000 (26) - VHOST_F_LOG_ALL
+ * - 0x008000000 (27) - VIRTIO_F_ANY_LAYOUT
+ * - 0x010000000 (28) - VIRTIO_F_INDIRECT_DESC
+ * - 0x040000000 (30) - VHOST_USER_F_PROTOCOL_FEATURES
+ * - 0x100000000 (32) - VIRTIO_F_VERSION_1
+ *
+ * - <b>hwaddr <mac-addr></b> - Optional ethernet address, can be in either
+ * X:X:X:X:X:X unix or X.X.X cisco format.
+ *
+ * - <b>renumber <dev_instance></b> - Optional parameter which allows the instance
+ * in the name to be specified. If instance already exists, name will be used
+ * anyway and multiple instances will have the same name. Use with caution.
+ *
+ * @cliexpar
+ * Example of how to create a vhost interface with VPP as the client and all features enabled:
+ * @cliexstart{create vhost-user socket /var/run/vpp/vhost1.sock}
+ * VirtualEthernet0/0/0
+ * @cliexend
+ * Example of how to create a vhost interface with VPP as the server and with just
+ * multiple queues enabled:
+ * @cliexstart{create vhost-user socket /var/run/vpp/vhost2.sock server feature-mask 0x40400000}
+ * VirtualEthernet0/0/1
+ * @cliexend
+ * Once the vHost interface is created, enable the interface using:
+ * @cliexcmd{set interface state VirtualEthernet0/0/0 up}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (vhost_user_connect_command, static) = {
+ .path = "create vhost-user",
+ .short_help = "create vhost-user socket <socket-filename> [server] "
+ "[feature-mask <hex>] [hwaddr <mac-addr>] [renumber <dev_instance>] ",
+ .function = vhost_user_connect_command_fn,
+};
+/* *INDENT-ON* */
+
+/*?
+ * Delete a vHost User interface using the interface name or the
+ * software interface index. Use the '<em>show interface</em>'
+ * command to determine the software interface index. On deletion,
+ * the linux socket will not be deleted.
+ *
+ * @cliexpar
+ * Example of how to delete a vhost interface by name:
+ * @cliexcmd{delete vhost-user VirtualEthernet0/0/1}
+ * Example of how to delete a vhost interface by software interface index:
+ * @cliexcmd{delete vhost-user sw_if_index 1}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (vhost_user_delete_command, static) = {
+ .path = "delete vhost-user",
+ .short_help = "delete vhost-user {<interface> | sw_if_index <sw_idx>}",
+ .function = vhost_user_delete_command_fn,
+};
+
+/*?
+ * Display the attributes of a single vHost User interface (provide interface
+ * name), multiple vHost User interfaces (provide a list of interface names seperated
+ * by spaces) or all Vhost User interfaces (omit an interface name to display all
+ * vHost interfaces).
+ *
+ * @cliexpar
+ * @parblock
+ * Example of how to display a vhost interface:
+ * @cliexstart{show vhost-user VirtualEthernet0/0/0}
+ * Virtio vhost-user interfaces
+ * Global:
+ * coalesce frames 32 time 1e-3
+ * Interface: VirtualEthernet0/0/0 (ifindex 1)
+ * virtio_net_hdr_sz 12
+ * features mask (0xffffffffffffffff):
+ * features (0x50408000):
+ * VIRTIO_NET_F_MRG_RXBUF (15)
+ * VIRTIO_NET_F_MQ (22)
+ * VIRTIO_F_INDIRECT_DESC (28)
+ * VHOST_USER_F_PROTOCOL_FEATURES (30)
+ * protocol features (0x3)
+ * VHOST_USER_PROTOCOL_F_MQ (0)
+ * VHOST_USER_PROTOCOL_F_LOG_SHMFD (1)
+ *
+ * socket filename /var/run/vpp/vhost1.sock type client errno "Success"
+ *
+ * rx placement:
+ * thread 1 on vring 1
+ * thread 1 on vring 5
+ * thread 2 on vring 3
+ * thread 2 on vring 7
+ * tx placement: spin-lock
+ * thread 0 on vring 0
+ * thread 1 on vring 2
+ * thread 2 on vring 0
+ *
+ * Memory regions (total 2)
+ * region fd guest_phys_addr memory_size userspace_addr mmap_offset mmap_addr
+ * ====== ===== ================== ================== ================== ================== ==================
+ * 0 60 0x0000000000000000 0x00000000000a0000 0x00002aaaaac00000 0x0000000000000000 0x00002aab2b400000
+ * 1 61 0x00000000000c0000 0x000000003ff40000 0x00002aaaaacc0000 0x00000000000c0000 0x00002aababcc0000
+ *
+ * Virtqueue 0 (TX)
+ * qsz 256 last_avail_idx 0 last_used_idx 0
+ * avail.flags 1 avail.idx 128 used.flags 1 used.idx 0
+ * kickfd 62 callfd 64 errfd -1
+ *
+ * Virtqueue 1 (RX)
+ * qsz 256 last_avail_idx 0 last_used_idx 0
+ * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
+ * kickfd 65 callfd 66 errfd -1
+ *
+ * Virtqueue 2 (TX)
+ * qsz 256 last_avail_idx 0 last_used_idx 0
+ * avail.flags 1 avail.idx 128 used.flags 1 used.idx 0
+ * kickfd 63 callfd 70 errfd -1
+ *
+ * Virtqueue 3 (RX)
+ * qsz 256 last_avail_idx 0 last_used_idx 0
+ * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
+ * kickfd 72 callfd 74 errfd -1
+ *
+ * Virtqueue 4 (TX disabled)
+ * qsz 256 last_avail_idx 0 last_used_idx 0
+ * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
+ * kickfd 76 callfd 78 errfd -1
+ *
+ * Virtqueue 5 (RX disabled)
+ * qsz 256 last_avail_idx 0 last_used_idx 0
+ * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
+ * kickfd 80 callfd 82 errfd -1
+ *
+ * Virtqueue 6 (TX disabled)
+ * qsz 256 last_avail_idx 0 last_used_idx 0
+ * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
+ * kickfd 84 callfd 86 errfd -1
+ *
+ * Virtqueue 7 (RX disabled)
+ * qsz 256 last_avail_idx 0 last_used_idx 0
+ * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
+ * kickfd 88 callfd 90 errfd -1
+ *
+ * @cliexend
+ *
+ * The optional '<em>descriptors</em>' parameter will display the same output as
+ * the previous example but will include the descriptor table for each queue.
+ * The output is truncated below:
+ * @cliexstart{show vhost-user VirtualEthernet0/0/0 descriptors}
+ * Virtio vhost-user interfaces
+ * Global:
+ * coalesce frames 32 time 1e-3
+ * Interface: VirtualEthernet0/0/0 (ifindex 1)
+ * virtio_net_hdr_sz 12
+ * features mask (0xffffffffffffffff):
+ * features (0x50408000):
+ * VIRTIO_NET_F_MRG_RXBUF (15)
+ * VIRTIO_NET_F_MQ (22)
+ * :
+ * Virtqueue 0 (TX)
+ * qsz 256 last_avail_idx 0 last_used_idx 0
+ * avail.flags 1 avail.idx 128 used.flags 1 used.idx 0
+ * kickfd 62 callfd 64 errfd -1
+ *
+ * descriptor table:
+ * id addr len flags next user_addr
+ * ===== ================== ===== ====== ===== ==================
+ * 0 0x0000000010b6e974 2060 0x0002 1 0x00002aabbc76e974
+ * 1 0x0000000010b6e034 2060 0x0002 2 0x00002aabbc76e034
+ * 2 0x0000000010b6d6f4 2060 0x0002 3 0x00002aabbc76d6f4
+ * 3 0x0000000010b6cdb4 2060 0x0002 4 0x00002aabbc76cdb4
+ * 4 0x0000000010b6c474 2060 0x0002 5 0x00002aabbc76c474
+ * 5 0x0000000010b6bb34 2060 0x0002 6 0x00002aabbc76bb34
+ * 6 0x0000000010b6b1f4 2060 0x0002 7 0x00002aabbc76b1f4
+ * 7 0x0000000010b6a8b4 2060 0x0002 8 0x00002aabbc76a8b4
+ * 8 0x0000000010b69f74 2060 0x0002 9 0x00002aabbc769f74
+ * 9 0x0000000010b69634 2060 0x0002 10 0x00002aabbc769634
+ * 10 0x0000000010b68cf4 2060 0x0002 11 0x00002aabbc768cf4
+ * :
+ * 249 0x0000000000000000 0 0x0000 250 0x00002aab2b400000
+ * 250 0x0000000000000000 0 0x0000 251 0x00002aab2b400000
+ * 251 0x0000000000000000 0 0x0000 252 0x00002aab2b400000
+ * 252 0x0000000000000000 0 0x0000 253 0x00002aab2b400000
+ * 253 0x0000000000000000 0 0x0000 254 0x00002aab2b400000
+ * 254 0x0000000000000000 0 0x0000 255 0x00002aab2b400000
+ * 255 0x0000000000000000 0 0x0000 32768 0x00002aab2b400000
+ *
+ * Virtqueue 1 (RX)
+ * qsz 256 last_avail_idx 0 last_used_idx 0
+ * :
+ * @cliexend
+ * @endparblock
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (show_vhost_user_command, static) = {
+ .path = "show vhost-user",
+ .short_help = "show vhost-user [<interface> [<interface> [..]]] [descriptors]",
+ .function = show_vhost_user_command_fn,
+};
+/* *INDENT-ON* */
+
+clib_error_t *
+debug_vhost_user_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ clib_error_t *error = NULL;
+ vhost_user_main_t *vum = &vhost_user_main;
+ u8 onoff = 0;
+ u8 input_found = 0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return clib_error_return (0, "missing argument");
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (input_found)
+ {
+ error = clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+
+ if (unformat (line_input, "on"))
+ {
+ input_found = 1;
+ onoff = 1;
+ }
+ else if (unformat (line_input, "off"))
+ {
+ input_found = 1;
+ onoff = 0;
+ }
+ else
+ {
+ error = clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ vum->debug = onoff;
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (debug_vhost_user_command, static) = {
+ .path = "debug vhost-user",
+ .short_help = "debug vhost-user <on | off>",
+ .function = debug_vhost_user_command_fn,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+vhost_user_config (vlib_main_t * vm, unformat_input_t * input)
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "coalesce-frames %d", &vum->coalesce_frames))
+ ;
+ else if (unformat (input, "coalesce-time %f", &vum->coalesce_time))
+ ;
+ else if (unformat (input, "dont-dump-memory"))
+ vum->dont_dump_vhost_user_memory = 1;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ }
+
+ return 0;
+}
+
+
+/* vhost-user { ... } configuration. */
+VLIB_CONFIG_FUNCTION (vhost_user_config, "vhost-user");
+
+void
+vhost_user_unmap_all (void)
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_user_intf_t *vui;
+
+ if (vum->dont_dump_vhost_user_memory)
+ {
+ pool_foreach (vui, vum->vhost_user_interfaces,
+ unmap_all_mem_regions (vui);
+ );
+ }
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/devices/virtio/vhost-user.h b/src/vnet/devices/virtio/vhost_user.h
similarity index 87%
rename from src/vnet/devices/virtio/vhost-user.h
rename to src/vnet/devices/virtio/vhost_user.h
index 105b92b..ff06695 100644
--- a/src/vnet/devices/virtio/vhost-user.h
+++ b/src/vnet/devices/virtio/vhost_user.h
@@ -45,6 +45,40 @@
#define VRING_USED_F_NO_NOTIFY 1
#define VRING_AVAIL_F_NO_INTERRUPT 1
+#define DBG_SOCK(args...) \
+ { \
+ vhost_user_main_t *_vum = &vhost_user_main; \
+ if (_vum->debug) \
+ clib_warning(args); \
+ };
+
+#define VHOST_DEBUG_VQ 0
+
+#if VHOST_DEBUG_VQ == 1
+#define DBG_VQ(args...) clib_warning(args);
+#else
+#define DBG_VQ(args...)
+#endif
+
+#define UNIX_GET_FD(unixfd_idx) ({ \
+ typeof(unixfd_idx) __unixfd_idx = (unixfd_idx); \
+ (__unixfd_idx != ~0) ? \
+ pool_elt_at_index (file_main.file_pool, \
+ __unixfd_idx)->file_descriptor : -1; })
+
+#define foreach_virtio_trace_flags \
+ _ (SIMPLE_CHAINED, 0, "Simple descriptor chaining") \
+ _ (SINGLE_DESC, 1, "Single descriptor packet") \
+ _ (INDIRECT, 2, "Indirect descriptor") \
+ _ (MAP_ERROR, 4, "Memory mapping error")
+
+typedef enum
+{
+#define _(n,i,s) VIRTIO_TRACE_F_##n,
+ foreach_virtio_trace_flags
+#undef _
+} virtio_trace_flag_t;
+
#define foreach_virtio_net_feature \
_ (VIRTIO_NET_F_MRG_RXBUF, 15) \
_ (VIRTIO_NET_F_CTRL_VQ, 17) \
@@ -56,7 +90,6 @@
_ (VHOST_USER_F_PROTOCOL_FEATURES, 30) \
_ (VIRTIO_F_VERSION_1, 32)
-
typedef enum
{
#define _(f,n) FEAT_##f = (n),
@@ -331,6 +364,11 @@
int vhost_user_dump_ifs (vnet_main_t * vnm, vlib_main_t * vm,
vhost_user_intf_details_t ** out_vuids);
+extern vlib_node_registration_t vhost_user_send_interrupt_node;
+extern vnet_device_class_t vhost_user_device_class;
+extern vlib_node_registration_t vhost_user_input_node;
+extern vhost_user_main_t vhost_user_main;
+
#endif
/*
diff --git a/src/vnet/devices/virtio/vhost_user_api.c b/src/vnet/devices/virtio/vhost_user_api.c
index 442d914..59dba25 100644
--- a/src/vnet/devices/virtio/vhost_user_api.c
+++ b/src/vnet/devices/virtio/vhost_user_api.c
@@ -22,7 +22,7 @@
#include <vnet/interface.h>
#include <vnet/api_errno.h>
-#include <vnet/devices/virtio/vhost-user.h>
+#include <vnet/devices/virtio/vhost_user.h>
#include <vnet/vnet_msg_enum.h>
diff --git a/src/vnet/devices/virtio/vhost_user_inline.h b/src/vnet/devices/virtio/vhost_user_inline.h
new file mode 100644
index 0000000..9f61351
--- /dev/null
+++ b/src/vnet/devices/virtio/vhost_user_inline.h
@@ -0,0 +1,262 @@
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef __VIRTIO_VHOST_USER_INLINE_H__
+#define __VIRTIO_VHOST_USER_INLINE_H__
+/* vhost-user inline functions */
+
+static_always_inline void *
+map_guest_mem (vhost_user_intf_t * vui, uword addr, u32 * hint)
+{
+ int i = *hint;
+ if (PREDICT_TRUE ((vui->regions[i].guest_phys_addr <= addr) &&
+ ((vui->regions[i].guest_phys_addr +
+ vui->regions[i].memory_size) > addr)))
+ {
+ return (void *) (vui->region_mmap_addr[i] + addr -
+ vui->regions[i].guest_phys_addr);
+ }
+#if __SSE4_2__
+ __m128i rl, rh, al, ah, r;
+ al = _mm_set1_epi64x (addr + 1);
+ ah = _mm_set1_epi64x (addr);
+
+ rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[0]);
+ rl = _mm_cmpgt_epi64 (al, rl);
+ rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[0]);
+ rh = _mm_cmpgt_epi64 (rh, ah);
+ r = _mm_and_si128 (rl, rh);
+
+ rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[2]);
+ rl = _mm_cmpgt_epi64 (al, rl);
+ rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[2]);
+ rh = _mm_cmpgt_epi64 (rh, ah);
+ r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x22);
+
+ rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[4]);
+ rl = _mm_cmpgt_epi64 (al, rl);
+ rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[4]);
+ rh = _mm_cmpgt_epi64 (rh, ah);
+ r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x44);
+
+ rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[6]);
+ rl = _mm_cmpgt_epi64 (al, rl);
+ rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[6]);
+ rh = _mm_cmpgt_epi64 (rh, ah);
+ r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x88);
+
+ r = _mm_shuffle_epi8 (r, _mm_set_epi64x (0, 0x0e060c040a020800));
+ i = count_trailing_zeros (_mm_movemask_epi8 (r) |
+ (1 << VHOST_MEMORY_MAX_NREGIONS));
+
+ if (i < vui->nregions)
+ {
+ *hint = i;
+ return (void *) (vui->region_mmap_addr[i] + addr -
+ vui->regions[i].guest_phys_addr);
+ }
+#elif __aarch64__ && __ARM_NEON
+ uint64x2_t al, ah, rl, rh, r;
+ uint32_t u32 = 0;
+
+ al = vdupq_n_u64 (addr + 1);
+ ah = vdupq_n_u64 (addr);
+
+ /*First Iteration */
+ rl = vld1q_u64 (&vui->region_guest_addr_lo[0]);
+ rl = vcgtq_u64 (al, rl);
+ rh = vld1q_u64 (&vui->region_guest_addr_hi[0]);
+ rh = vcgtq_u64 (rh, ah);
+ r = vandq_u64 (rl, rh);
+ u32 |= (vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 0) & 0x1);
+ u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 8) & 0x1) << 1);
+
+ if (u32)
+ {
+ i = count_trailing_zeros (u32);
+ goto vhost_map_guest_mem_done;
+ }
+
+ /*Second Iteration */
+ rl = vld1q_u64 (&vui->region_guest_addr_lo[2]);
+ rl = vcgtq_u64 (al, rl);
+ rh = vld1q_u64 (&vui->region_guest_addr_hi[2]);
+ rh = vcgtq_u64 (rh, ah);
+ r = vandq_u64 (rl, rh);
+ u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 0) & 0x1) << 2);
+ u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 8) & 0x1) << 3);
+
+ if (u32)
+ {
+ i = count_trailing_zeros (u32);
+ goto vhost_map_guest_mem_done;
+ }
+
+ /*Third Iteration */
+ rl = vld1q_u64 (&vui->region_guest_addr_lo[4]);
+ rl = vcgtq_u64 (al, rl);
+ rh = vld1q_u64 (&vui->region_guest_addr_hi[4]);
+ rh = vcgtq_u64 (rh, ah);
+ r = vandq_u64 (rl, rh);
+ u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 0) & 0x1) << 6);
+ u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 8) & 0x1) << 7);
+
+ i = count_trailing_zeros (u32 | (1 << VHOST_MEMORY_MAX_NREGIONS));
+
+vhost_map_guest_mem_done:
+ if (i < vui->nregions)
+ {
+ *hint = i;
+ return (void *) (vui->region_mmap_addr[i] + addr -
+ vui->regions[i].guest_phys_addr);
+ }
+#else
+ for (i = 0; i < vui->nregions; i++)
+ {
+ if ((vui->regions[i].guest_phys_addr <= addr) &&
+ ((vui->regions[i].guest_phys_addr + vui->regions[i].memory_size) >
+ addr))
+ {
+ *hint = i;
+ return (void *) (vui->region_mmap_addr[i] + addr -
+ vui->regions[i].guest_phys_addr);
+ }
+ }
+#endif
+ DBG_VQ ("failed to map guest mem addr %llx", addr);
+ *hint = 0;
+ return 0;
+}
+
+static_always_inline void *
+map_user_mem (vhost_user_intf_t * vui, uword addr)
+{
+ int i;
+ for (i = 0; i < vui->nregions; i++)
+ {
+ if ((vui->regions[i].userspace_addr <= addr) &&
+ ((vui->regions[i].userspace_addr + vui->regions[i].memory_size) >
+ addr))
+ {
+ return (void *) (vui->region_mmap_addr[i] + addr -
+ vui->regions[i].userspace_addr);
+ }
+ }
+ return 0;
+}
+
+#define VHOST_LOG_PAGE 0x1000
+
+static_always_inline void
+vhost_user_log_dirty_pages_2 (vhost_user_intf_t * vui,
+ u64 addr, u64 len, u8 is_host_address)
+{
+ if (PREDICT_TRUE (vui->log_base_addr == 0
+ || !(vui->features & (1 << FEAT_VHOST_F_LOG_ALL))))
+ {
+ return;
+ }
+ if (is_host_address)
+ {
+ addr = pointer_to_uword (map_user_mem (vui, (uword) addr));
+ }
+ if (PREDICT_FALSE ((addr + len - 1) / VHOST_LOG_PAGE / 8 >= vui->log_size))
+ {
+ DBG_SOCK ("vhost_user_log_dirty_pages(): out of range\n");
+ return;
+ }
+
+ CLIB_MEMORY_BARRIER ();
+ u64 page = addr / VHOST_LOG_PAGE;
+ while (page * VHOST_LOG_PAGE < addr + len)
+ {
+ ((u8 *) vui->log_base_addr)[page / 8] |= 1 << page % 8;
+ page++;
+ }
+}
+
+
+#define vhost_user_log_dirty_ring(vui, vq, member) \
+ if (PREDICT_FALSE(vq->log_used)) { \
+ vhost_user_log_dirty_pages_2(vui, vq->log_guest_addr + STRUCT_OFFSET_OF(vring_used_t, member), \
+ sizeof(vq->used->member), 0); \
+ }
+
+static_always_inline u8 *
+format_vhost_trace (u8 * s, va_list * va)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
+ CLIB_UNUSED (vnet_main_t * vnm) = vnet_get_main ();
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_trace_t *t = va_arg (*va, vhost_trace_t *);
+ vhost_user_intf_t *vui = pool_elt_at_index (vum->vhost_user_interfaces,
+ t->device_index);
+
+ vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, vui->sw_if_index);
+
+ u32 indent = format_get_indent (s);
+
+ s = format (s, "%U %U queue %d\n", format_white_space, indent,
+ format_vnet_sw_interface_name, vnm, sw, t->qid);
+
+ s = format (s, "%U virtio flags:\n", format_white_space, indent);
+#define _(n,i,st) \
+ if (t->virtio_ring_flags & (1 << VIRTIO_TRACE_F_##n)) \
+ s = format (s, "%U %s %s\n", format_white_space, indent, #n, st);
+ foreach_virtio_trace_flags
+#undef _
+ s = format (s, "%U virtio_net_hdr first_desc_len %u\n",
+ format_white_space, indent, t->first_desc_len);
+
+ s = format (s, "%U flags 0x%02x gso_type %u\n",
+ format_white_space, indent,
+ t->hdr.hdr.flags, t->hdr.hdr.gso_type);
+
+ if (vui->virtio_net_hdr_sz == 12)
+ s = format (s, "%U num_buff %u",
+ format_white_space, indent, t->hdr.num_buffers);
+
+ return s;
+}
+
+static_always_inline void
+vhost_user_send_call (vlib_main_t * vm, vhost_user_vring_t * vq)
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+ u64 x = 1;
+ int fd = UNIX_GET_FD (vq->callfd_idx);
+ int rv;
+
+ rv = write (fd, &x, sizeof (x));
+ if (rv <= 0)
+ {
+ clib_unix_warning
+ ("Error: Could not write to unix socket for callfd %d", fd);
+ return;
+ }
+
+ vq->n_since_last_int = 0;
+ vq->int_deadline = vlib_time_now (vm) + vum->coalesce_time;
+}
+
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/devices/virtio/vhost_user_input.c b/src/vnet/devices/virtio/vhost_user_input.c
new file mode 100644
index 0000000..3db4473
--- /dev/null
+++ b/src/vnet/devices/virtio/vhost_user_input.c
@@ -0,0 +1,678 @@
+/*
+ *------------------------------------------------------------------
+ * vhost-user-input
+ *
+ * Copyright (c) 2014-2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <fcntl.h> /* for open */
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/uio.h> /* for iovec */
+#include <netinet/in.h>
+#include <sys/vfs.h>
+
+#include <linux/if_arp.h>
+#include <linux/if_tun.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+
+#include <vnet/ip/ip.h>
+
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/devices/devices.h>
+#include <vnet/feature/feature.h>
+
+#include <vnet/devices/virtio/vhost_user.h>
+#include <vnet/devices/virtio/vhost_user_inline.h>
+
+/*
+ * When an RX queue is down but active, received packets
+ * must be discarded. This value controls up to how many
+ * packets will be discarded during each round.
+ */
+#define VHOST_USER_DOWN_DISCARD_COUNT 256
+
+/*
+ * When the number of available buffers gets under this threshold,
+ * RX node will start discarding packets.
+ */
+#define VHOST_USER_RX_BUFFER_STARVATION 32
+
+/*
+ * On the receive side, the host should free descriptors as soon
+ * as possible in order to avoid TX drop in the VM.
+ * This value controls the number of copy operations that are stacked
+ * before copy is done for all and descriptors are given back to
+ * the guest.
+ * The value 64 was obtained by testing (48 and 128 were not as good).
+ */
+#define VHOST_USER_RX_COPY_THRESHOLD 64
+
+vlib_node_registration_t vhost_user_input_node;
+
+#define foreach_vhost_user_input_func_error \
+ _(NO_ERROR, "no error") \
+ _(NO_BUFFER, "no available buffer") \
+ _(MMAP_FAIL, "mmap failure") \
+ _(INDIRECT_OVERFLOW, "indirect descriptor overflows table") \
+ _(UNDERSIZED_FRAME, "undersized ethernet frame received (< 14 bytes)") \
+ _(FULL_RX_QUEUE, "full rx queue (possible driver tx drop)")
+
+typedef enum
+{
+#define _(f,s) VHOST_USER_INPUT_FUNC_ERROR_##f,
+ foreach_vhost_user_input_func_error
+#undef _
+ VHOST_USER_INPUT_FUNC_N_ERROR,
+} vhost_user_input_func_error_t;
+
+static __clib_unused char *vhost_user_input_func_error_strings[] = {
+#define _(n,s) s,
+ foreach_vhost_user_input_func_error
+#undef _
+};
+
+static_always_inline void
+vhost_user_rx_trace (vhost_trace_t * t,
+ vhost_user_intf_t * vui, u16 qid,
+ vlib_buffer_t * b, vhost_user_vring_t * txvq)
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+ u32 last_avail_idx = txvq->last_avail_idx;
+ u32 desc_current = txvq->avail->ring[last_avail_idx & txvq->qsz_mask];
+ vring_desc_t *hdr_desc = 0;
+ virtio_net_hdr_mrg_rxbuf_t *hdr;
+ u32 hint = 0;
+
+ memset (t, 0, sizeof (*t));
+ t->device_index = vui - vum->vhost_user_interfaces;
+ t->qid = qid;
+
+ hdr_desc = &txvq->desc[desc_current];
+ if (txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)
+ {
+ t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_INDIRECT;
+ /* Header is the first here */
+ hdr_desc = map_guest_mem (vui, txvq->desc[desc_current].addr, &hint);
+ }
+ if (txvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT)
+ {
+ t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SIMPLE_CHAINED;
+ }
+ if (!(txvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT) &&
+ !(txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT))
+ {
+ t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SINGLE_DESC;
+ }
+
+ t->first_desc_len = hdr_desc ? hdr_desc->len : 0;
+
+ if (!hdr_desc || !(hdr = map_guest_mem (vui, hdr_desc->addr, &hint)))
+ {
+ t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_MAP_ERROR;
+ }
+ else
+ {
+ u32 len = vui->virtio_net_hdr_sz;
+ memcpy (&t->hdr, hdr, len > hdr_desc->len ? hdr_desc->len : len);
+ }
+}
+
+static_always_inline u32
+vhost_user_input_copy (vhost_user_intf_t * vui, vhost_copy_t * cpy,
+ u16 copy_len, u32 * map_hint)
+{
+ void *src0, *src1, *src2, *src3;
+ if (PREDICT_TRUE (copy_len >= 4))
+ {
+ if (PREDICT_FALSE (!(src2 = map_guest_mem (vui, cpy[0].src, map_hint))))
+ return 1;
+ if (PREDICT_FALSE (!(src3 = map_guest_mem (vui, cpy[1].src, map_hint))))
+ return 1;
+
+ while (PREDICT_TRUE (copy_len >= 4))
+ {
+ src0 = src2;
+ src1 = src3;
+
+ if (PREDICT_FALSE
+ (!(src2 = map_guest_mem (vui, cpy[2].src, map_hint))))
+ return 1;
+ if (PREDICT_FALSE
+ (!(src3 = map_guest_mem (vui, cpy[3].src, map_hint))))
+ return 1;
+
+ CLIB_PREFETCH (src2, 64, LOAD);
+ CLIB_PREFETCH (src3, 64, LOAD);
+
+ clib_memcpy ((void *) cpy[0].dst, src0, cpy[0].len);
+ clib_memcpy ((void *) cpy[1].dst, src1, cpy[1].len);
+ copy_len -= 2;
+ cpy += 2;
+ }
+ }
+ while (copy_len)
+ {
+ if (PREDICT_FALSE (!(src0 = map_guest_mem (vui, cpy->src, map_hint))))
+ return 1;
+ clib_memcpy ((void *) cpy->dst, src0, cpy->len);
+ copy_len -= 1;
+ cpy += 1;
+ }
+ return 0;
+}
+
+/**
+ * Try to discard packets from the tx ring (VPP RX path).
+ * Returns the number of discarded packets.
+ */
+static_always_inline u32
+vhost_user_rx_discard_packet (vlib_main_t * vm,
+ vhost_user_intf_t * vui,
+ vhost_user_vring_t * txvq, u32 discard_max)
+{
+ /*
+ * On the RX side, each packet corresponds to one descriptor
+ * (it is the same whether it is a shallow descriptor, chained, or indirect).
+ * Therefore, discarding a packet is like discarding a descriptor.
+ */
+ u32 discarded_packets = 0;
+ u32 avail_idx = txvq->avail->idx;
+ while (discarded_packets != discard_max)
+ {
+ if (avail_idx == txvq->last_avail_idx)
+ goto out;
+
+ u16 desc_chain_head =
+ txvq->avail->ring[txvq->last_avail_idx & txvq->qsz_mask];
+ txvq->last_avail_idx++;
+ txvq->used->ring[txvq->last_used_idx & txvq->qsz_mask].id =
+ desc_chain_head;
+ txvq->used->ring[txvq->last_used_idx & txvq->qsz_mask].len = 0;
+ vhost_user_log_dirty_ring (vui, txvq,
+ ring[txvq->last_used_idx & txvq->qsz_mask]);
+ txvq->last_used_idx++;
+ discarded_packets++;
+ }
+
+out:
+ CLIB_MEMORY_BARRIER ();
+ txvq->used->idx = txvq->last_used_idx;
+ vhost_user_log_dirty_ring (vui, txvq, idx);
+ return discarded_packets;
+}
+
+/*
+ * In case of overflow, we need to rewind the array of allocated buffers.
+ */
+static __clib_unused void
+vhost_user_input_rewind_buffers (vlib_main_t * vm,
+ vhost_cpu_t * cpu, vlib_buffer_t * b_head)
+{
+ u32 bi_current = cpu->rx_buffers[cpu->rx_buffers_len];
+ vlib_buffer_t *b_current = vlib_get_buffer (vm, bi_current);
+ b_current->current_length = 0;
+ b_current->flags = 0;
+ while (b_current != b_head)
+ {
+ cpu->rx_buffers_len++;
+ bi_current = cpu->rx_buffers[cpu->rx_buffers_len];
+ b_current = vlib_get_buffer (vm, bi_current);
+ b_current->current_length = 0;
+ b_current->flags = 0;
+ }
+ cpu->rx_buffers_len++;
+}
+
+static __clib_unused u32
+vhost_user_if_input (vlib_main_t * vm,
+ vhost_user_main_t * vum,
+ vhost_user_intf_t * vui,
+ u16 qid, vlib_node_runtime_t * node,
+ vnet_hw_interface_rx_mode mode)
+{
+ vhost_user_vring_t *txvq = &vui->vrings[VHOST_VRING_IDX_TX (qid)];
+ u16 n_rx_packets = 0;
+ u32 n_rx_bytes = 0;
+ u16 n_left;
+ u32 n_left_to_next, *to_next;
+ u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
+ u32 n_trace = vlib_get_trace_count (vm, node);
+ u32 map_hint = 0;
+ u16 thread_index = vlib_get_thread_index ();
+ u16 copy_len = 0;
+
+ {
+ /* do we have pending interrupts ? */
+ vhost_user_vring_t *rxvq = &vui->vrings[VHOST_VRING_IDX_RX (qid)];
+ f64 now = vlib_time_now (vm);
+
+ if ((txvq->n_since_last_int) && (txvq->int_deadline < now))
+ vhost_user_send_call (vm, txvq);
+
+ if ((rxvq->n_since_last_int) && (rxvq->int_deadline < now))
+ vhost_user_send_call (vm, rxvq);
+ }
+
+ /*
+ * For adaptive mode, it is optimized to reduce interrupts.
+ * If the scheduler switches the input node to polling due
+ * to burst of traffic, we tell the driver no interrupt.
+ * When the traffic subsides, the scheduler switches the node back to
+ * interrupt mode. We must tell the driver we want interrupt.
+ */
+ if (PREDICT_FALSE (mode == VNET_HW_INTERFACE_RX_MODE_ADAPTIVE))
+ {
+ if ((node->flags &
+ VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE) ||
+ !(node->flags &
+ VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE))
+ /* Tell driver we want notification */
+ txvq->used->flags = 0;
+ else
+ /* Tell driver we don't want notification */
+ txvq->used->flags = VRING_USED_F_NO_NOTIFY;
+ }
+
+ if (PREDICT_FALSE (txvq->avail->flags & 0xFFFE))
+ return 0;
+
+ n_left = (u16) (txvq->avail->idx - txvq->last_avail_idx);
+
+ /* nothing to do */
+ if (PREDICT_FALSE (n_left == 0))
+ return 0;
+
+ if (PREDICT_FALSE (!vui->admin_up || !(txvq->enabled)))
+ {
+ /*
+ * Discard input packet if interface is admin down or vring is not
+ * enabled.
+ * "For example, for a networking device, in the disabled state
+ * client must not supply any new RX packets, but must process
+ * and discard any TX packets."
+ */
+ vhost_user_rx_discard_packet (vm, vui, txvq,
+ VHOST_USER_DOWN_DISCARD_COUNT);
+ return 0;
+ }
+
+ if (PREDICT_FALSE (n_left == (txvq->qsz_mask + 1)))
+ {
+ /*
+ * Informational error logging when VPP is not
+ * receiving packets fast enough.
+ */
+ vlib_error_count (vm, node->node_index,
+ VHOST_USER_INPUT_FUNC_ERROR_FULL_RX_QUEUE, 1);
+ }
+
+ if (n_left > VLIB_FRAME_SIZE)
+ n_left = VLIB_FRAME_SIZE;
+
+ /*
+ * For small packets (<2kB), we will not need more than one vlib buffer
+ * per packet. In case packets are bigger, we will just yeld at some point
+ * in the loop and come back later. This is not an issue as for big packet,
+ * processing cost really comes from the memory copy.
+ * The assumption is that big packets will fit in 40 buffers.
+ */
+ if (PREDICT_FALSE (vum->cpus[thread_index].rx_buffers_len < n_left + 1 ||
+ vum->cpus[thread_index].rx_buffers_len < 40))
+ {
+ u32 curr_len = vum->cpus[thread_index].rx_buffers_len;
+ vum->cpus[thread_index].rx_buffers_len +=
+ vlib_buffer_alloc_from_free_list (vm,
+ vum->cpus[thread_index].rx_buffers +
+ curr_len,
+ VHOST_USER_RX_BUFFERS_N - curr_len,
+ VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
+
+ if (PREDICT_FALSE
+ (vum->cpus[thread_index].rx_buffers_len <
+ VHOST_USER_RX_BUFFER_STARVATION))
+ {
+ /* In case of buffer starvation, discard some packets from the queue
+ * and log the event.
+ * We keep doing best effort for the remaining packets. */
+ u32 flush = (n_left + 1 > vum->cpus[thread_index].rx_buffers_len) ?
+ n_left + 1 - vum->cpus[thread_index].rx_buffers_len : 1;
+ flush = vhost_user_rx_discard_packet (vm, vui, txvq, flush);
+
+ n_left -= flush;
+ vlib_increment_simple_counter (vnet_main.
+ interface_main.sw_if_counters +
+ VNET_INTERFACE_COUNTER_DROP,
+ vlib_get_thread_index (),
+ vui->sw_if_index, flush);
+
+ vlib_error_count (vm, vhost_user_input_node.index,
+ VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER, flush);
+ }
+ }
+
+ while (n_left > 0)
+ {
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left > 0 && n_left_to_next > 0)
+ {
+ vlib_buffer_t *b_head, *b_current;
+ u32 bi_current;
+ u16 desc_current;
+ u32 desc_data_offset;
+ vring_desc_t *desc_table = txvq->desc;
+
+ if (PREDICT_FALSE (vum->cpus[thread_index].rx_buffers_len <= 1))
+ {
+ /* Not enough rx_buffers
+ * Note: We yeld on 1 so we don't need to do an additional
+ * check for the next buffer prefetch.
+ */
+ n_left = 0;
+ break;
+ }
+
+ desc_current =
+ txvq->avail->ring[txvq->last_avail_idx & txvq->qsz_mask];
+ vum->cpus[thread_index].rx_buffers_len--;
+ bi_current = (vum->cpus[thread_index].rx_buffers)
+ [vum->cpus[thread_index].rx_buffers_len];
+ b_head = b_current = vlib_get_buffer (vm, bi_current);
+ to_next[0] = bi_current; //We do that now so we can forget about bi_current
+ to_next++;
+ n_left_to_next--;
+
+ vlib_prefetch_buffer_with_index (vm,
+ (vum->
+ cpus[thread_index].rx_buffers)
+ [vum->cpus[thread_index].
+ rx_buffers_len - 1], LOAD);
+
+ /* Just preset the used descriptor id and length for later */
+ txvq->used->ring[txvq->last_used_idx & txvq->qsz_mask].id =
+ desc_current;
+ txvq->used->ring[txvq->last_used_idx & txvq->qsz_mask].len = 0;
+ vhost_user_log_dirty_ring (vui, txvq,
+ ring[txvq->last_used_idx &
+ txvq->qsz_mask]);
+
+ /* The buffer should already be initialized */
+ b_head->total_length_not_including_first_buffer = 0;
+ b_head->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
+
+ if (PREDICT_FALSE (n_trace))
+ {
+ //TODO: next_index is not exactly known at that point
+ vlib_trace_buffer (vm, node, next_index, b_head,
+ /* follow_chain */ 0);
+ vhost_trace_t *t0 =
+ vlib_add_trace (vm, node, b_head, sizeof (t0[0]));
+ vhost_user_rx_trace (t0, vui, qid, b_head, txvq);
+ n_trace--;
+ vlib_set_trace_count (vm, node, n_trace);
+ }
+
+ /* This depends on the setup but is very consistent
+ * So I think the CPU branch predictor will make a pretty good job
+ * at optimizing the decision. */
+ if (txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)
+ {
+ desc_table = map_guest_mem (vui, txvq->desc[desc_current].addr,
+ &map_hint);
+ desc_current = 0;
+ if (PREDICT_FALSE (desc_table == 0))
+ {
+ vlib_error_count (vm, node->node_index,
+ VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL, 1);
+ goto out;
+ }
+ }
+
+ if (PREDICT_TRUE (vui->is_any_layout) ||
+ (!(desc_table[desc_current].flags & VIRTQ_DESC_F_NEXT)))
+ {
+ /* ANYLAYOUT or single buffer */
+ desc_data_offset = vui->virtio_net_hdr_sz;
+ }
+ else
+ {
+ /* CSR case without ANYLAYOUT, skip 1st buffer */
+ desc_data_offset = desc_table[desc_current].len;
+ }
+
+ while (1)
+ {
+ /* Get more input if necessary. Or end of packet. */
+ if (desc_data_offset == desc_table[desc_current].len)
+ {
+ if (PREDICT_FALSE (desc_table[desc_current].flags &
+ VIRTQ_DESC_F_NEXT))
+ {
+ desc_current = desc_table[desc_current].next;
+ desc_data_offset = 0;
+ }
+ else
+ {
+ goto out;
+ }
+ }
+
+ /* Get more output if necessary. Or end of packet. */
+ if (PREDICT_FALSE
+ (b_current->current_length == VLIB_BUFFER_DATA_SIZE))
+ {
+ if (PREDICT_FALSE
+ (vum->cpus[thread_index].rx_buffers_len == 0))
+ {
+ /* Cancel speculation */
+ to_next--;
+ n_left_to_next++;
+
+ /*
+ * Checking if there are some left buffers.
+ * If not, just rewind the used buffers and stop.
+ * Note: Scheduled copies are not cancelled. This is
+ * not an issue as they would still be valid. Useless,
+ * but valid.
+ */
+ vhost_user_input_rewind_buffers (vm,
+ &vum->cpus
+ [thread_index],
+ b_head);
+ n_left = 0;
+ goto stop;
+ }
+
+ /* Get next output */
+ vum->cpus[thread_index].rx_buffers_len--;
+ u32 bi_next =
+ (vum->cpus[thread_index].rx_buffers)[vum->cpus
+ [thread_index].rx_buffers_len];
+ b_current->next_buffer = bi_next;
+ b_current->flags |= VLIB_BUFFER_NEXT_PRESENT;
+ bi_current = bi_next;
+ b_current = vlib_get_buffer (vm, bi_current);
+ }
+
+ /* Prepare a copy order executed later for the data */
+ vhost_copy_t *cpy = &vum->cpus[thread_index].copy[copy_len];
+ copy_len++;
+ u32 desc_data_l =
+ desc_table[desc_current].len - desc_data_offset;
+ cpy->len = VLIB_BUFFER_DATA_SIZE - b_current->current_length;
+ cpy->len = (cpy->len > desc_data_l) ? desc_data_l : cpy->len;
+ cpy->dst = (uword) (vlib_buffer_get_current (b_current) +
+ b_current->current_length);
+ cpy->src = desc_table[desc_current].addr + desc_data_offset;
+
+ desc_data_offset += cpy->len;
+
+ b_current->current_length += cpy->len;
+ b_head->total_length_not_including_first_buffer += cpy->len;
+ }
+
+ out:
+ CLIB_PREFETCH (&n_left, sizeof (n_left), LOAD);
+
+ n_rx_bytes += b_head->total_length_not_including_first_buffer;
+ n_rx_packets++;
+
+ b_head->total_length_not_including_first_buffer -=
+ b_head->current_length;
+
+ /* consume the descriptor and return it as used */
+ txvq->last_avail_idx++;
+ txvq->last_used_idx++;
+
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b_head);
+
+ vnet_buffer (b_head)->sw_if_index[VLIB_RX] = vui->sw_if_index;
+ vnet_buffer (b_head)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ b_head->error = 0;
+
+ {
+ u32 next0 = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
+
+ /* redirect if feature path enabled */
+ vnet_feature_start_device_input_x1 (vui->sw_if_index, &next0,
+ b_head);
+
+ u32 bi = to_next[-1]; //Cannot use to_next[-1] in the macro
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi, next0);
+ }
+
+ n_left--;
+
+ /*
+ * Although separating memory copies from virtio ring parsing
+ * is beneficial, we can offer to perform the copies from time
+ * to time in order to free some space in the ring.
+ */
+ if (PREDICT_FALSE (copy_len >= VHOST_USER_RX_COPY_THRESHOLD))
+ {
+ if (PREDICT_FALSE
+ (vhost_user_input_copy (vui, vum->cpus[thread_index].copy,
+ copy_len, &map_hint)))
+ {
+ vlib_error_count (vm, node->node_index,
+ VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL, 1);
+ }
+ copy_len = 0;
+
+ /* give buffers back to driver */
+ CLIB_MEMORY_BARRIER ();
+ txvq->used->idx = txvq->last_used_idx;
+ vhost_user_log_dirty_ring (vui, txvq, idx);
+ }
+ }
+ stop:
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ /* Do the memory copies */
+ if (PREDICT_FALSE
+ (vhost_user_input_copy (vui, vum->cpus[thread_index].copy,
+ copy_len, &map_hint)))
+ {
+ vlib_error_count (vm, node->node_index,
+ VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL, 1);
+ }
+
+ /* give buffers back to driver */
+ CLIB_MEMORY_BARRIER ();
+ txvq->used->idx = txvq->last_used_idx;
+ vhost_user_log_dirty_ring (vui, txvq, idx);
+
+ /* interrupt (call) handling */
+ if ((txvq->callfd_idx != ~0) &&
+ !(txvq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
+ {
+ txvq->n_since_last_int += n_rx_packets;
+
+ if (txvq->n_since_last_int > vum->coalesce_frames)
+ vhost_user_send_call (vm, txvq);
+ }
+
+ /* increase rx counters */
+ vlib_increment_combined_counter
+ (vnet_main.interface_main.combined_sw_if_counters
+ + VNET_INTERFACE_COUNTER_RX,
+ vlib_get_thread_index (), vui->sw_if_index, n_rx_packets, n_rx_bytes);
+
+ vnet_device_increment_rx_packets (thread_index, n_rx_packets);
+
+ return n_rx_packets;
+}
+
+VLIB_NODE_FN (vhost_user_input_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+ uword n_rx_packets = 0;
+ vhost_user_intf_t *vui;
+ vnet_device_input_runtime_t *rt =
+ (vnet_device_input_runtime_t *) node->runtime_data;
+ vnet_device_and_queue_t *dq;
+
+ vec_foreach (dq, rt->devices_and_queues)
+ {
+ if (clib_smp_swap (&dq->interrupt_pending, 0) ||
+ (node->state == VLIB_NODE_STATE_POLLING))
+ {
+ vui =
+ pool_elt_at_index (vum->vhost_user_interfaces, dq->dev_instance);
+ n_rx_packets = vhost_user_if_input (vm, vum, vui, dq->queue_id, node,
+ dq->mode);
+ }
+ }
+
+ return n_rx_packets;
+}
+
+#ifndef CLIB_MARCH_VARIANT
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (vhost_user_input_node) = {
+ .type = VLIB_NODE_TYPE_INPUT,
+ .name = "vhost-user-input",
+ .sibling_of = "device-input",
+
+ /* Will be enabled if/when hardware is detected. */
+ .state = VLIB_NODE_STATE_DISABLED,
+
+ .format_buffer = format_ethernet_header_with_length,
+ .format_trace = format_vhost_trace,
+
+ .n_errors = VHOST_USER_INPUT_FUNC_N_ERROR,
+ .error_strings = vhost_user_input_func_error_strings,
+};
+/* *INDENT-ON* */
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/devices/virtio/vhost_user_output.c b/src/vnet/devices/virtio/vhost_user_output.c
new file mode 100644
index 0000000..f400f18
--- /dev/null
+++ b/src/vnet/devices/virtio/vhost_user_output.c
@@ -0,0 +1,671 @@
+/*
+ *------------------------------------------------------------------
+ * vhost-user-output
+ *
+ * Copyright (c) 2014-2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <fcntl.h> /* for open */
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/uio.h> /* for iovec */
+#include <netinet/in.h>
+#include <sys/vfs.h>
+
+#include <linux/if_arp.h>
+#include <linux/if_tun.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+
+#include <vnet/ip/ip.h>
+
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/devices/devices.h>
+#include <vnet/feature/feature.h>
+
+#include <vnet/devices/virtio/vhost_user.h>
+#include <vnet/devices/virtio/vhost_user_inline.h>
+
+/*
+ * On the transmit side, we keep processing the buffers from vlib in the while
+ * loop and prepare the copy order to be executed later. However, the static
+ * array which we keep the copy order is limited to VHOST_USER_COPY_ARRAY_N
+ * entries. In order to not corrupt memory, we have to do the copy when the
+ * static array reaches the copy threshold. We subtract 40 in case the code
+ * goes into the inner loop for a maximum of 64k frames which may require
+ * more array entries.
+ */
+#define VHOST_USER_TX_COPY_THRESHOLD (VHOST_USER_COPY_ARRAY_N - 40)
+
+vnet_device_class_t vhost_user_device_class;
+
+#define foreach_vhost_user_tx_func_error \
+ _(NONE, "no error") \
+ _(NOT_READY, "vhost vring not ready") \
+ _(DOWN, "vhost interface is down") \
+ _(PKT_DROP_NOBUF, "tx packet drops (no available descriptors)") \
+ _(PKT_DROP_NOMRG, "tx packet drops (cannot merge descriptors)") \
+ _(MMAP_FAIL, "mmap failure") \
+ _(INDIRECT_OVERFLOW, "indirect descriptor table overflow")
+
+typedef enum
+{
+#define _(f,s) VHOST_USER_TX_FUNC_ERROR_##f,
+ foreach_vhost_user_tx_func_error
+#undef _
+ VHOST_USER_TX_FUNC_N_ERROR,
+} vhost_user_tx_func_error_t;
+
+static __clib_unused char *vhost_user_tx_func_error_strings[] = {
+#define _(n,s) s,
+ foreach_vhost_user_tx_func_error
+#undef _
+};
+
+static __clib_unused u8 *
+format_vhost_user_interface_name (u8 * s, va_list * args)
+{
+ u32 i = va_arg (*args, u32);
+ u32 show_dev_instance = ~0;
+ vhost_user_main_t *vum = &vhost_user_main;
+
+ if (i < vec_len (vum->show_dev_instance_by_real_dev_instance))
+ show_dev_instance = vum->show_dev_instance_by_real_dev_instance[i];
+
+ if (show_dev_instance != ~0)
+ i = show_dev_instance;
+
+ s = format (s, "VirtualEthernet0/0/%d", i);
+ return s;
+}
+
+static __clib_unused int
+vhost_user_name_renumber (vnet_hw_interface_t * hi, u32 new_dev_instance)
+{
+ // FIXME: check if the new dev instance is already used
+ vhost_user_main_t *vum = &vhost_user_main;
+ vec_validate_init_empty (vum->show_dev_instance_by_real_dev_instance,
+ hi->dev_instance, ~0);
+
+ vum->show_dev_instance_by_real_dev_instance[hi->dev_instance] =
+ new_dev_instance;
+
+ DBG_SOCK ("renumbered vhost-user interface dev_instance %d to %d",
+ hi->dev_instance, new_dev_instance);
+
+ return 0;
+}
+
+/**
+ * @brief Try once to lock the vring
+ * @return 0 on success, non-zero on failure.
+ */
+static_always_inline int
+vhost_user_vring_try_lock (vhost_user_intf_t * vui, u32 qid)
+{
+ return __sync_lock_test_and_set (vui->vring_locks[qid], 1);
+}
+
+/**
+ * @brief Spin until the vring is successfully locked
+ */
+static_always_inline void
+vhost_user_vring_lock (vhost_user_intf_t * vui, u32 qid)
+{
+ while (vhost_user_vring_try_lock (vui, qid))
+ ;
+}
+
+/**
+ * @brief Unlock the vring lock
+ */
+static_always_inline void
+vhost_user_vring_unlock (vhost_user_intf_t * vui, u32 qid)
+{
+ *vui->vring_locks[qid] = 0;
+}
+
+static_always_inline void
+vhost_user_tx_trace (vhost_trace_t * t,
+ vhost_user_intf_t * vui, u16 qid,
+ vlib_buffer_t * b, vhost_user_vring_t * rxvq)
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+ u32 last_avail_idx = rxvq->last_avail_idx;
+ u32 desc_current = rxvq->avail->ring[last_avail_idx & rxvq->qsz_mask];
+ vring_desc_t *hdr_desc = 0;
+ u32 hint = 0;
+
+ memset (t, 0, sizeof (*t));
+ t->device_index = vui - vum->vhost_user_interfaces;
+ t->qid = qid;
+
+ hdr_desc = &rxvq->desc[desc_current];
+ if (rxvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)
+ {
+ t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_INDIRECT;
+ /* Header is the first here */
+ hdr_desc = map_guest_mem (vui, rxvq->desc[desc_current].addr, &hint);
+ }
+ if (rxvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT)
+ {
+ t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SIMPLE_CHAINED;
+ }
+ if (!(rxvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT) &&
+ !(rxvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT))
+ {
+ t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SINGLE_DESC;
+ }
+
+ t->first_desc_len = hdr_desc ? hdr_desc->len : 0;
+}
+
+static_always_inline u32
+vhost_user_tx_copy (vhost_user_intf_t * vui, vhost_copy_t * cpy,
+ u16 copy_len, u32 * map_hint)
+{
+ void *dst0, *dst1, *dst2, *dst3;
+ if (PREDICT_TRUE (copy_len >= 4))
+ {
+ if (PREDICT_FALSE (!(dst2 = map_guest_mem (vui, cpy[0].dst, map_hint))))
+ return 1;
+ if (PREDICT_FALSE (!(dst3 = map_guest_mem (vui, cpy[1].dst, map_hint))))
+ return 1;
+ while (PREDICT_TRUE (copy_len >= 4))
+ {
+ dst0 = dst2;
+ dst1 = dst3;
+
+ if (PREDICT_FALSE
+ (!(dst2 = map_guest_mem (vui, cpy[2].dst, map_hint))))
+ return 1;
+ if (PREDICT_FALSE
+ (!(dst3 = map_guest_mem (vui, cpy[3].dst, map_hint))))
+ return 1;
+
+ CLIB_PREFETCH ((void *) cpy[2].src, 64, LOAD);
+ CLIB_PREFETCH ((void *) cpy[3].src, 64, LOAD);
+
+ clib_memcpy (dst0, (void *) cpy[0].src, cpy[0].len);
+ clib_memcpy (dst1, (void *) cpy[1].src, cpy[1].len);
+
+ vhost_user_log_dirty_pages_2 (vui, cpy[0].dst, cpy[0].len, 1);
+ vhost_user_log_dirty_pages_2 (vui, cpy[1].dst, cpy[1].len, 1);
+ copy_len -= 2;
+ cpy += 2;
+ }
+ }
+ while (copy_len)
+ {
+ if (PREDICT_FALSE (!(dst0 = map_guest_mem (vui, cpy->dst, map_hint))))
+ return 1;
+ clib_memcpy (dst0, (void *) cpy->src, cpy->len);
+ vhost_user_log_dirty_pages_2 (vui, cpy->dst, cpy->len, 1);
+ copy_len -= 1;
+ cpy += 1;
+ }
+ return 0;
+}
+
+
+uword
+CLIB_MULTIARCH_FN (vhost_user_tx) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 *buffers = vlib_frame_args (frame);
+ u32 n_left = frame->n_vectors;
+ vhost_user_main_t *vum = &vhost_user_main;
+ vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
+ vhost_user_intf_t *vui =
+ pool_elt_at_index (vum->vhost_user_interfaces, rd->dev_instance);
+ u32 qid = ~0;
+ vhost_user_vring_t *rxvq;
+ u8 error;
+ u32 thread_index = vlib_get_thread_index ();
+ u32 map_hint = 0;
+ u8 retry = 8;
+ u16 copy_len;
+ u16 tx_headers_len;
+
+ if (PREDICT_FALSE (!vui->admin_up))
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_DOWN;
+ goto done3;
+ }
+
+ if (PREDICT_FALSE (!vui->is_up))
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_NOT_READY;
+ goto done3;
+ }
+
+ qid =
+ VHOST_VRING_IDX_RX (*vec_elt_at_index
+ (vui->per_cpu_tx_qid, thread_index));
+ rxvq = &vui->vrings[qid];
+ if (PREDICT_FALSE (vui->use_tx_spinlock))
+ vhost_user_vring_lock (vui, qid);
+
+retry:
+ error = VHOST_USER_TX_FUNC_ERROR_NONE;
+ tx_headers_len = 0;
+ copy_len = 0;
+ while (n_left > 0)
+ {
+ vlib_buffer_t *b0, *current_b0;
+ u16 desc_head, desc_index, desc_len;
+ vring_desc_t *desc_table;
+ uword buffer_map_addr;
+ u32 buffer_len;
+ u16 bytes_left;
+
+ if (PREDICT_TRUE (n_left > 1))
+ vlib_prefetch_buffer_with_index (vm, buffers[1], LOAD);
+
+ b0 = vlib_get_buffer (vm, buffers[0]);
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vum->cpus[thread_index].current_trace =
+ vlib_add_trace (vm, node, b0,
+ sizeof (*vum->cpus[thread_index].current_trace));
+ vhost_user_tx_trace (vum->cpus[thread_index].current_trace,
+ vui, qid / 2, b0, rxvq);
+ }
+
+ if (PREDICT_FALSE (rxvq->last_avail_idx == rxvq->avail->idx))
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
+ goto done;
+ }
+
+ desc_table = rxvq->desc;
+ desc_head = desc_index =
+ rxvq->avail->ring[rxvq->last_avail_idx & rxvq->qsz_mask];
+
+ /* Go deeper in case of indirect descriptor
+ * I don't know of any driver providing indirect for RX. */
+ if (PREDICT_FALSE (rxvq->desc[desc_head].flags & VIRTQ_DESC_F_INDIRECT))
+ {
+ if (PREDICT_FALSE
+ (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
+ goto done;
+ }
+ if (PREDICT_FALSE
+ (!(desc_table =
+ map_guest_mem (vui, rxvq->desc[desc_index].addr,
+ &map_hint))))
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
+ goto done;
+ }
+ desc_index = 0;
+ }
+
+ desc_len = vui->virtio_net_hdr_sz;
+ buffer_map_addr = desc_table[desc_index].addr;
+ buffer_len = desc_table[desc_index].len;
+
+ {
+ // Get a header from the header array
+ virtio_net_hdr_mrg_rxbuf_t *hdr =
+ &vum->cpus[thread_index].tx_headers[tx_headers_len];
+ tx_headers_len++;
+ hdr->hdr.flags = 0;
+ hdr->hdr.gso_type = 0;
+ hdr->num_buffers = 1; //This is local, no need to check
+
+ // Prepare a copy order executed later for the header
+ vhost_copy_t *cpy = &vum->cpus[thread_index].copy[copy_len];
+ copy_len++;
+ cpy->len = vui->virtio_net_hdr_sz;
+ cpy->dst = buffer_map_addr;
+ cpy->src = (uword) hdr;
+ }
+
+ buffer_map_addr += vui->virtio_net_hdr_sz;
+ buffer_len -= vui->virtio_net_hdr_sz;
+ bytes_left = b0->current_length;
+ current_b0 = b0;
+ while (1)
+ {
+ if (buffer_len == 0)
+ { //Get new output
+ if (desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT)
+ {
+ //Next one is chained
+ desc_index = desc_table[desc_index].next;
+ buffer_map_addr = desc_table[desc_index].addr;
+ buffer_len = desc_table[desc_index].len;
+ }
+ else if (vui->virtio_net_hdr_sz == 12) //MRG is available
+ {
+ virtio_net_hdr_mrg_rxbuf_t *hdr =
+ &vum->cpus[thread_index].tx_headers[tx_headers_len - 1];
+
+ //Move from available to used buffer
+ rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].id =
+ desc_head;
+ rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].len =
+ desc_len;
+ vhost_user_log_dirty_ring (vui, rxvq,
+ ring[rxvq->last_used_idx &
+ rxvq->qsz_mask]);
+
+ rxvq->last_avail_idx++;
+ rxvq->last_used_idx++;
+ hdr->num_buffers++;
+ desc_len = 0;
+
+ if (PREDICT_FALSE
+ (rxvq->last_avail_idx == rxvq->avail->idx))
+ {
+ //Dequeue queued descriptors for this packet
+ rxvq->last_used_idx -= hdr->num_buffers - 1;
+ rxvq->last_avail_idx -= hdr->num_buffers - 1;
+ error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
+ goto done;
+ }
+
+ desc_table = rxvq->desc;
+ desc_head = desc_index =
+ rxvq->avail->ring[rxvq->last_avail_idx & rxvq->qsz_mask];
+ if (PREDICT_FALSE
+ (rxvq->desc[desc_head].flags & VIRTQ_DESC_F_INDIRECT))
+ {
+ //It is seriously unlikely that a driver will put indirect descriptor
+ //after non-indirect descriptor.
+ if (PREDICT_FALSE
+ (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
+ goto done;
+ }
+ if (PREDICT_FALSE
+ (!(desc_table =
+ map_guest_mem (vui,
+ rxvq->desc[desc_index].addr,
+ &map_hint))))
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
+ goto done;
+ }
+ desc_index = 0;
+ }
+ buffer_map_addr = desc_table[desc_index].addr;
+ buffer_len = desc_table[desc_index].len;
+ }
+ else
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOMRG;
+ goto done;
+ }
+ }
+
+ {
+ vhost_copy_t *cpy = &vum->cpus[thread_index].copy[copy_len];
+ copy_len++;
+ cpy->len = bytes_left;
+ cpy->len = (cpy->len > buffer_len) ? buffer_len : cpy->len;
+ cpy->dst = buffer_map_addr;
+ cpy->src = (uword) vlib_buffer_get_current (current_b0) +
+ current_b0->current_length - bytes_left;
+
+ bytes_left -= cpy->len;
+ buffer_len -= cpy->len;
+ buffer_map_addr += cpy->len;
+ desc_len += cpy->len;
+
+ CLIB_PREFETCH (&rxvq->desc, CLIB_CACHE_LINE_BYTES, LOAD);
+ }
+
+ // Check if vlib buffer has more data. If not, get more or break.
+ if (PREDICT_TRUE (!bytes_left))
+ {
+ if (PREDICT_FALSE
+ (current_b0->flags & VLIB_BUFFER_NEXT_PRESENT))
+ {
+ current_b0 = vlib_get_buffer (vm, current_b0->next_buffer);
+ bytes_left = current_b0->current_length;
+ }
+ else
+ {
+ //End of packet
+ break;
+ }
+ }
+ }
+
+ //Move from available to used ring
+ rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].id = desc_head;
+ rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].len = desc_len;
+ vhost_user_log_dirty_ring (vui, rxvq,
+ ring[rxvq->last_used_idx & rxvq->qsz_mask]);
+ rxvq->last_avail_idx++;
+ rxvq->last_used_idx++;
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vum->cpus[thread_index].current_trace->hdr =
+ vum->cpus[thread_index].tx_headers[tx_headers_len - 1];
+ }
+
+ n_left--; //At the end for error counting when 'goto done' is invoked
+
+ /*
+ * Do the copy periodically to prevent
+ * vum->cpus[thread_index].copy array overflow and corrupt memory
+ */
+ if (PREDICT_FALSE (copy_len >= VHOST_USER_TX_COPY_THRESHOLD))
+ {
+ if (PREDICT_FALSE
+ (vhost_user_tx_copy (vui, vum->cpus[thread_index].copy,
+ copy_len, &map_hint)))
+ {
+ vlib_error_count (vm, node->node_index,
+ VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL, 1);
+ }
+ copy_len = 0;
+
+ /* give buffers back to driver */
+ CLIB_MEMORY_BARRIER ();
+ rxvq->used->idx = rxvq->last_used_idx;
+ vhost_user_log_dirty_ring (vui, rxvq, idx);
+ }
+ buffers++;
+ }
+
+done:
+ //Do the memory copies
+ if (PREDICT_FALSE
+ (vhost_user_tx_copy (vui, vum->cpus[thread_index].copy,
+ copy_len, &map_hint)))
+ {
+ vlib_error_count (vm, node->node_index,
+ VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL, 1);
+ }
+
+ CLIB_MEMORY_BARRIER ();
+ rxvq->used->idx = rxvq->last_used_idx;
+ vhost_user_log_dirty_ring (vui, rxvq, idx);
+
+ /*
+ * When n_left is set, error is always set to something too.
+ * In case error is due to lack of remaining buffers, we go back up and
+ * retry.
+ * The idea is that it is better to waste some time on packets
+ * that have been processed already than dropping them and get
+ * more fresh packets with a good likelyhood that they will be dropped too.
+ * This technique also gives more time to VM driver to pick-up packets.
+ * In case the traffic flows from physical to virtual interfaces, this
+ * technique will end-up leveraging the physical NIC buffer in order to
+ * absorb the VM's CPU jitter.
+ */
+ if (n_left && (error == VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF) && retry)
+ {
+ retry--;
+ goto retry;
+ }
+
+ /* interrupt (call) handling */
+ if ((rxvq->callfd_idx != ~0) &&
+ !(rxvq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
+ {
+ rxvq->n_since_last_int += frame->n_vectors - n_left;
+
+ if (rxvq->n_since_last_int > vum->coalesce_frames)
+ vhost_user_send_call (vm, rxvq);
+ }
+
+ vhost_user_vring_unlock (vui, qid);
+
+done3:
+ if (PREDICT_FALSE (n_left && error != VHOST_USER_TX_FUNC_ERROR_NONE))
+ {
+ vlib_error_count (vm, node->node_index, error, n_left);
+ vlib_increment_simple_counter
+ (vnet_main.interface_main.sw_if_counters
+ + VNET_INTERFACE_COUNTER_DROP,
+ thread_index, vui->sw_if_index, n_left);
+ }
+
+ vlib_buffer_free (vm, vlib_frame_args (frame), frame->n_vectors);
+ return frame->n_vectors;
+}
+
+static __clib_unused clib_error_t *
+vhost_user_interface_rx_mode_change (vnet_main_t * vnm, u32 hw_if_index,
+ u32 qid, vnet_hw_interface_rx_mode mode)
+{
+ vlib_main_t *vm = vnm->vlib_main;
+ vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index);
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_user_intf_t *vui =
+ pool_elt_at_index (vum->vhost_user_interfaces, hif->dev_instance);
+ vhost_user_vring_t *txvq = &vui->vrings[VHOST_VRING_IDX_TX (qid)];
+
+ if ((mode == VNET_HW_INTERFACE_RX_MODE_INTERRUPT) ||
+ (mode == VNET_HW_INTERFACE_RX_MODE_ADAPTIVE))
+ {
+ if (txvq->kickfd_idx == ~0)
+ {
+ // We cannot support interrupt mode if the driver opts out
+ return clib_error_return (0, "Driver does not support interrupt");
+ }
+ if (txvq->mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
+ {
+ vum->ifq_count++;
+ // Start the timer if this is the first encounter on interrupt
+ // interface/queue
+ if ((vum->ifq_count == 1) &&
+ (vum->coalesce_time > 0.0) && (vum->coalesce_frames > 0))
+ vlib_process_signal_event (vm,
+ vhost_user_send_interrupt_node.index,
+ VHOST_USER_EVENT_START_TIMER, 0);
+ }
+ }
+ else if (mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
+ {
+ if (((txvq->mode == VNET_HW_INTERFACE_RX_MODE_INTERRUPT) ||
+ (txvq->mode == VNET_HW_INTERFACE_RX_MODE_ADAPTIVE)) &&
+ vum->ifq_count)
+ {
+ vum->ifq_count--;
+ // Stop the timer if there is no more interrupt interface/queue
+ if ((vum->ifq_count == 0) &&
+ (vum->coalesce_time > 0.0) && (vum->coalesce_frames > 0))
+ vlib_process_signal_event (vm,
+ vhost_user_send_interrupt_node.index,
+ VHOST_USER_EVENT_STOP_TIMER, 0);
+ }
+ }
+
+ txvq->mode = mode;
+ if (mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
+ txvq->used->flags = VRING_USED_F_NO_NOTIFY;
+ else if ((mode == VNET_HW_INTERFACE_RX_MODE_ADAPTIVE) ||
+ (mode == VNET_HW_INTERFACE_RX_MODE_INTERRUPT))
+ txvq->used->flags = 0;
+ else
+ {
+ clib_warning ("BUG: unhandled mode %d changed for if %d queue %d", mode,
+ hw_if_index, qid);
+ return clib_error_return (0, "unsupported");
+ }
+
+ return 0;
+}
+
+static __clib_unused clib_error_t *
+vhost_user_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
+ u32 flags)
+{
+ vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index);
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_user_intf_t *vui =
+ pool_elt_at_index (vum->vhost_user_interfaces, hif->dev_instance);
+ u32 hw_flags = 0;
+ vui->admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
+ hw_flags = vui->admin_up ? VNET_HW_INTERFACE_FLAG_LINK_UP : 0;
+
+ vnet_hw_interface_set_flags (vnm, vui->hw_if_index, hw_flags);
+
+ return /* no error */ 0;
+}
+
+#ifndef CLIB_MARCH_VARIANT
+/* *INDENT-OFF* */
+VNET_DEVICE_CLASS (vhost_user_device_class) = {
+ .name = "vhost-user",
+ .tx_function = vhost_user_tx,
+ .tx_function_n_errors = VHOST_USER_TX_FUNC_N_ERROR,
+ .tx_function_error_strings = vhost_user_tx_func_error_strings,
+ .format_device_name = format_vhost_user_interface_name,
+ .name_renumber = vhost_user_name_renumber,
+ .admin_up_down_function = vhost_user_interface_admin_up_down,
+ .rx_mode_change_function = vhost_user_interface_rx_mode_change,
+ .format_tx_trace = format_vhost_trace,
+};
+
+#if __x86_64__
+vlib_node_function_t __clib_weak vhost_user_tx_avx512;
+vlib_node_function_t __clib_weak vhost_user_tx_avx2;
+static void __clib_constructor
+vhost_user_tx_multiarch_select (void)
+{
+ if (vhost_user_tx_avx512 && clib_cpu_supports_avx512f ())
+ vhost_user_device_class.tx_function = vhost_user_tx_avx512;
+ else if (vhost_user_tx_avx2 && clib_cpu_supports_avx2 ())
+ vhost_user_device_class.tx_function = vhost_user_tx_avx2;
+}
+#endif
+#endif
+
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */