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Damjan Marion8389fb92017-10-13 18:29:53 +02001/*
2 *------------------------------------------------------------------
3 * Copyright (c) 2016 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *------------------------------------------------------------------
16 */
17
18#include <sys/types.h>
19#include <sys/stat.h>
20#include <fcntl.h>
21#include <net/if.h>
22#include <linux/if_tun.h>
23#include <sys/ioctl.h>
Damjan Marion8389fb92017-10-13 18:29:53 +020024#include <sys/eventfd.h>
25
26#include <vlib/vlib.h>
27#include <vlib/unix/unix.h>
28#include <vnet/ethernet/ethernet.h>
Damjan Marion8389fb92017-10-13 18:29:53 +020029#include <vnet/feature/feature.h>
Damjan Marion94100532020-11-06 23:25:57 +010030#include <vnet/interface/rx_queue_funcs.h>
Milan Lenco73e7f422017-12-14 10:04:25 +010031#include <vnet/ip/ip4_packet.h>
32#include <vnet/ip/ip6_packet.h>
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +020033#include <vnet/udp/udp_packet.h>
Damjan Marion8389fb92017-10-13 18:29:53 +020034#include <vnet/devices/virtio/virtio.h>
Mohsin Kazmi6799f9b2021-04-28 18:55:45 +020035#include <vnet/devices/virtio/virtio_inline.h>
Damjan Marion8389fb92017-10-13 18:29:53 +020036
37static char *virtio_input_error_strings[] = {
Mohsin Kazmi6799f9b2021-04-28 18:55:45 +020038#define _(n, s) s,
Damjan Marion8389fb92017-10-13 18:29:53 +020039 foreach_virtio_input_error
40#undef _
41};
42
43typedef struct
44{
45 u32 next_index;
46 u32 hw_if_index;
47 u16 ring;
48 u16 len;
Mohsin Kazmia7a22812020-08-31 17:17:16 +020049 virtio_net_hdr_v1_t hdr;
Damjan Marion8389fb92017-10-13 18:29:53 +020050} virtio_input_trace_t;
51
52static u8 *
53format_virtio_input_trace (u8 * s, va_list * args)
54{
55 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
56 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
57 virtio_input_trace_t *t = va_arg (*args, virtio_input_trace_t *);
58 u32 indent = format_get_indent (s);
59
60 s = format (s, "virtio: hw_if_index %d next-index %d vring %u len %u",
61 t->hw_if_index, t->next_index, t->ring, t->len);
62 s = format (s, "\n%Uhdr: flags 0x%02x gso_type 0x%02x hdr_len %u "
63 "gso_size %u csum_start %u csum_offset %u num_buffers %u",
64 format_white_space, indent + 2,
65 t->hdr.flags, t->hdr.gso_type, t->hdr.hdr_len, t->hdr.gso_size,
66 t->hdr.csum_start, t->hdr.csum_offset, t->hdr.num_buffers);
67 return s;
68}
69
70static_always_inline void
Mohsin Kazmia7a22812020-08-31 17:17:16 +020071virtio_needs_csum (vlib_buffer_t * b0, virtio_net_hdr_v1_t * hdr,
Mohsin Kazmi206acf82020-04-06 14:19:54 +020072 u8 * l4_proto, u8 * l4_hdr_sz, virtio_if_type_t type)
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +020073{
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +020074 if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +020075 {
Mohsin Kazmi206acf82020-04-06 14:19:54 +020076 u16 ethertype = 0, l2hdr_sz = 0;
Mohsin Kazmi36f7a6a2021-05-05 14:26:38 +020077 vnet_buffer_oflags_t oflags = 0;
Mohsin Kazmi38b09682020-06-03 18:20:17 +020078
79 if (type == VIRTIO_IF_TYPE_TUN)
80 {
81 switch (b0->data[0] & 0xf0)
82 {
83 case 0x40:
84 ethertype = ETHERNET_TYPE_IP4;
85 break;
86 case 0x60:
87 ethertype = ETHERNET_TYPE_IP6;
88 break;
89 }
90 }
91 else
Mohsin Kazmi14bea1b2019-07-29 11:39:26 +020092 {
Mohsin Kazmi206acf82020-04-06 14:19:54 +020093 ethernet_header_t *eh =
94 (ethernet_header_t *) vlib_buffer_get_current (b0);
95 ethertype = clib_net_to_host_u16 (eh->type);
96 l2hdr_sz = sizeof (ethernet_header_t);
Mohsin Kazmi14bea1b2019-07-29 11:39:26 +020097
Mohsin Kazmi206acf82020-04-06 14:19:54 +020098 if (ethernet_frame_is_tagged (ethertype))
Mohsin Kazmi14bea1b2019-07-29 11:39:26 +020099 {
Mohsin Kazmi206acf82020-04-06 14:19:54 +0200100 ethernet_vlan_header_t *vlan =
101 (ethernet_vlan_header_t *) (eh + 1);
102
Mohsin Kazmi14bea1b2019-07-29 11:39:26 +0200103 ethertype = clib_net_to_host_u16 (vlan->type);
104 l2hdr_sz += sizeof (*vlan);
Mohsin Kazmi206acf82020-04-06 14:19:54 +0200105 if (ethertype == ETHERNET_TYPE_VLAN)
106 {
107 vlan++;
108 ethertype = clib_net_to_host_u16 (vlan->type);
109 l2hdr_sz += sizeof (*vlan);
110 }
111 }
112 }
Mohsin Kazmi14bea1b2019-07-29 11:39:26 +0200113
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100114 vnet_buffer (b0)->l2_hdr_offset = 0;
115 vnet_buffer (b0)->l3_hdr_offset = l2hdr_sz;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200116
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200117 if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP4))
118 {
Mohsin Kazmi72e73122019-10-22 13:33:13 +0200119 ip4_header_t *ip4 =
120 (ip4_header_t *) (vlib_buffer_get_current (b0) + l2hdr_sz);
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100121 vnet_buffer (b0)->l4_hdr_offset = l2hdr_sz + ip4_header_bytes (ip4);
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100122 *l4_proto = ip4->protocol;
Mohsin Kazmi68095382021-02-10 11:26:24 +0100123 oflags |= VNET_BUFFER_OFFLOAD_F_IP_CKSUM;
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200124 b0->flags |=
Mohsin Kazmi68095382021-02-10 11:26:24 +0100125 (VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
126 VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100127 VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200128 }
129 else if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP6))
130 {
Mohsin Kazmi72e73122019-10-22 13:33:13 +0200131 ip6_header_t *ip6 =
132 (ip6_header_t *) (vlib_buffer_get_current (b0) + l2hdr_sz);
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100133 vnet_buffer (b0)->l4_hdr_offset = l2hdr_sz + sizeof (ip6_header_t);
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200134 /* FIXME IPv6 EH traversal */
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100135 *l4_proto = ip6->protocol;
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100136 b0->flags |= (VNET_BUFFER_F_IS_IP6 |
137 VNET_BUFFER_F_L2_HDR_OFFSET_VALID
138 | VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
139 VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200140 }
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100141 if (*l4_proto == IP_PROTOCOL_TCP)
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200142 {
Mohsin Kazmi68095382021-02-10 11:26:24 +0100143 oflags |= VNET_BUFFER_OFFLOAD_F_TCP_CKSUM;
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100144 tcp_header_t *tcp = (tcp_header_t *) (vlib_buffer_get_current (b0) +
145 vnet_buffer
146 (b0)->l4_hdr_offset);
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100147 *l4_hdr_sz = tcp_header_bytes (tcp);
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200148 }
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100149 else if (*l4_proto == IP_PROTOCOL_UDP)
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200150 {
Mohsin Kazmi68095382021-02-10 11:26:24 +0100151 oflags |= VNET_BUFFER_OFFLOAD_F_UDP_CKSUM;
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100152 udp_header_t *udp = (udp_header_t *) (vlib_buffer_get_current (b0) +
153 vnet_buffer
154 (b0)->l4_hdr_offset);
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100155 *l4_hdr_sz = sizeof (*udp);
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200156 }
Mohsin Kazmi68095382021-02-10 11:26:24 +0100157 if (oflags)
158 vnet_buffer_offload_flags_set (b0, oflags);
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200159 }
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100160}
161
162static_always_inline void
Mohsin Kazmia7a22812020-08-31 17:17:16 +0200163fill_gso_buffer_flags (vlib_buffer_t * b0, virtio_net_hdr_v1_t * hdr,
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100164 u8 l4_proto, u8 l4_hdr_sz)
165{
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200166 if (hdr->gso_type == VIRTIO_NET_HDR_GSO_TCPV4)
167 {
168 ASSERT (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM);
169 vnet_buffer2 (b0)->gso_size = hdr->gso_size;
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100170 vnet_buffer2 (b0)->gso_l4_hdr_sz = l4_hdr_sz;
Mohsin Kazmi72e73122019-10-22 13:33:13 +0200171 b0->flags |= VNET_BUFFER_F_GSO | VNET_BUFFER_F_IS_IP4;
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200172 }
173 if (hdr->gso_type == VIRTIO_NET_HDR_GSO_TCPV6)
174 {
175 ASSERT (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM);
176 vnet_buffer2 (b0)->gso_size = hdr->gso_size;
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100177 vnet_buffer2 (b0)->gso_l4_hdr_sz = l4_hdr_sz;
Mohsin Kazmi72e73122019-10-22 13:33:13 +0200178 b0->flags |= VNET_BUFFER_F_GSO | VNET_BUFFER_F_IS_IP6;
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200179 }
180}
181
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100182static_always_inline u16
183virtio_n_left_to_process (virtio_vring_t * vring, const int packed)
184{
185 if (packed)
186 return vring->desc_in_use;
187 else
188 return vring->used->idx - vring->last_used_idx;
189}
190
191static_always_inline u16
192virtio_get_slot_id (virtio_vring_t * vring, const int packed, u16 last,
193 u16 mask)
194{
195 if (packed)
196 return vring->packed_desc[last].id;
197 else
198 return vring->used->ring[last & mask].id;
199}
200
201static_always_inline u16
202virtio_get_len (virtio_vring_t * vring, const int packed, const int hdr_sz,
203 u16 last, u16 mask)
204{
205 if (packed)
206 return vring->packed_desc[last].len - hdr_sz;
207 else
208 return vring->used->ring[last & mask].len - hdr_sz;
209}
210
211#define increment_last(last, packed, vring) \
212 do { \
213 last++; \
214 if (packed && last >= vring->size) \
215 { \
216 last = 0; \
217 vring->used_wrap_counter ^= 1; \
218 } \
219 } while (0)
220
Damjan Marion8389fb92017-10-13 18:29:53 +0200221static_always_inline uword
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200222virtio_device_input_gso_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
223 vlib_frame_t * frame, virtio_if_t * vif,
Damjan Marion4769ed92020-10-18 14:00:43 +0200224 virtio_vring_t * vring, virtio_if_type_t type,
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100225 int gso_enabled, int checksum_offload_enabled,
226 int packed)
Damjan Marion8389fb92017-10-13 18:29:53 +0200227{
228 vnet_main_t *vnm = vnet_get_main ();
Damjan Marion067cd622018-07-11 12:47:43 +0200229 u32 thread_index = vm->thread_index;
Damjan Marion8389fb92017-10-13 18:29:53 +0200230 uword n_trace = vlib_get_trace_count (vm, node);
Damjan Mariond96b28a2020-10-19 17:15:58 +0200231 u32 next_index;
Mohsin Kazmid6c15af2018-10-23 18:00:47 +0200232 const int hdr_sz = vif->virtio_net_hdr_sz;
Damjan Marion8389fb92017-10-13 18:29:53 +0200233 u32 *to_next = 0;
234 u32 n_rx_packets = 0;
235 u32 n_rx_bytes = 0;
236 u16 mask = vring->size - 1;
237 u16 last = vring->last_used_idx;
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100238 u16 n_left = virtio_n_left_to_process (vring, packed);
Mohsin Kazmi62594062021-11-05 16:13:57 +0000239 vlib_buffer_t bt = {};
Damjan Marion8389fb92017-10-13 18:29:53 +0200240
241 if (n_left == 0)
Damjan Marion4769ed92020-10-18 14:00:43 +0200242 return 0;
Damjan Marion8389fb92017-10-13 18:29:53 +0200243
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200244 if (type == VIRTIO_IF_TYPE_TUN)
Damjan Mariond96b28a2020-10-19 17:15:58 +0200245 {
246 next_index = VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
247 }
248 else
249 {
250 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
251 if (PREDICT_FALSE (vif->per_interface_next_index != ~0))
252 next_index = vif->per_interface_next_index;
253
254 /* only for l2, redirect if feature path enabled */
255 vnet_feature_start_device_input_x1 (vif->sw_if_index, &next_index, &bt);
256 }
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200257
Damjan Marion8389fb92017-10-13 18:29:53 +0200258 while (n_left)
259 {
260 u32 n_left_to_next;
261 u32 next0 = next_index;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200262
Damjan Marion8389fb92017-10-13 18:29:53 +0200263 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
264
265 while (n_left && n_left_to_next)
266 {
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100267 if (packed)
268 {
269 vring_packed_desc_t *d = &vring->packed_desc[last];
270 u16 flags = d->flags;
271 if ((flags & VRING_DESC_F_AVAIL) !=
272 (vring->used_wrap_counter << 7)
273 || (flags & VRING_DESC_F_USED) !=
274 (vring->used_wrap_counter << 15))
275 {
276 n_left = 0;
277 break;
278 }
279 }
Mohsin Kazmi516e4ed2020-02-24 15:54:24 +0100280 u8 l4_proto = 0, l4_hdr_sz = 0;
Mohsin Kazmid6c15af2018-10-23 18:00:47 +0200281 u16 num_buffers = 1;
Mohsin Kazmia7a22812020-08-31 17:17:16 +0200282 virtio_net_hdr_v1_t *hdr;
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100283 u16 slot = virtio_get_slot_id (vring, packed, last, mask);
284 u16 len = virtio_get_len (vring, packed, hdr_sz, last, mask);
Damjan Marion8389fb92017-10-13 18:29:53 +0200285 u32 bi0 = vring->buffers[slot];
286 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
Mohsin Kazmid6c15af2018-10-23 18:00:47 +0200287 hdr = vlib_buffer_get_current (b0);
Mohsin Kazmia7a22812020-08-31 17:17:16 +0200288 if (hdr_sz == sizeof (virtio_net_hdr_v1_t))
Mohsin Kazmid6c15af2018-10-23 18:00:47 +0200289 num_buffers = hdr->num_buffers;
Damjan Marion8389fb92017-10-13 18:29:53 +0200290
Mohsin Kazmi8975dbd2020-06-24 16:19:19 +0200291 b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200292 b0->current_data = 0;
Damjan Marion8389fb92017-10-13 18:29:53 +0200293 b0->current_length = len;
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200294
Mohsin Kazmi6d4af892020-01-03 15:11:53 +0000295 if (checksum_offload_enabled)
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200296 virtio_needs_csum (b0, hdr, &l4_proto, &l4_hdr_sz, type);
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100297
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200298 if (gso_enabled)
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100299 fill_gso_buffer_flags (b0, hdr, l4_proto, l4_hdr_sz);
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200300
Damjan Marion8389fb92017-10-13 18:29:53 +0200301 vnet_buffer (b0)->sw_if_index[VLIB_RX] = vif->sw_if_index;
302 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
303
304 /* if multisegment packet */
305 if (PREDICT_FALSE (num_buffers > 1))
306 {
307 vlib_buffer_t *pb, *cb;
308 pb = b0;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200309 b0->total_length_not_including_first_buffer = 0;
Damjan Marion8389fb92017-10-13 18:29:53 +0200310 while (num_buffers > 1)
311 {
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100312 increment_last (last, packed, vring);
313 u16 cslot = virtio_get_slot_id (vring, packed, last, mask);
Mohsin Kazmia17381a2020-12-03 11:35:23 +0100314 /* hdr size is 0 after 1st packet in chain buffers */
315 u16 clen = virtio_get_len (vring, packed, 0, last, mask);
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100316 u32 cbi = vring->buffers[cslot];
Damjan Marion8389fb92017-10-13 18:29:53 +0200317 cb = vlib_get_buffer (vm, cbi);
318
319 /* current buffer */
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100320 cb->current_length = clen;
Damjan Marion8389fb92017-10-13 18:29:53 +0200321
322 /* previous buffer */
323 pb->next_buffer = cbi;
324 pb->flags |= VLIB_BUFFER_NEXT_PRESENT;
325
326 /* first buffer */
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100327 b0->total_length_not_including_first_buffer += clen;
Damjan Marion8389fb92017-10-13 18:29:53 +0200328
329 pb = cb;
330 vring->desc_in_use--;
331 num_buffers--;
332 n_left--;
333 }
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200334 len += b0->total_length_not_including_first_buffer;
Damjan Marion8389fb92017-10-13 18:29:53 +0200335 }
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200336
337 if (type == VIRTIO_IF_TYPE_TUN)
Mohsin Kazmi206acf82020-04-06 14:19:54 +0200338 {
339 switch (b0->data[0] & 0xf0)
340 {
341 case 0x40:
342 next0 = VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
343 break;
344 case 0x60:
345 next0 = VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
346 break;
347 default:
348 next0 = VNET_DEVICE_INPUT_NEXT_DROP;
349 break;
350 }
Damjan Mariond96b28a2020-10-19 17:15:58 +0200351
352 if (PREDICT_FALSE (vif->per_interface_next_index != ~0))
353 next0 = vif->per_interface_next_index;
Mohsin Kazmi206acf82020-04-06 14:19:54 +0200354 }
Damjan Mariond96b28a2020-10-19 17:15:58 +0200355 else
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200356 {
Damjan Mariond96b28a2020-10-19 17:15:58 +0200357 /* copy feature arc data from template */
358 b0->current_config_index = bt.current_config_index;
359 vnet_buffer (b0)->feature_arc_index =
360 vnet_buffer (&bt)->feature_arc_index;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200361 }
Damjan Marion06c194d2019-11-13 10:12:53 +0100362
Damjan Marion8389fb92017-10-13 18:29:53 +0200363 /* trace */
BenoƮt Ganne9a3973e2020-10-02 19:36:57 +0200364 if (PREDICT_FALSE (n_trace > 0 && vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */
365 1)))
Damjan Marion8389fb92017-10-13 18:29:53 +0200366 {
367 virtio_input_trace_t *tr;
Damjan Marion8389fb92017-10-13 18:29:53 +0200368 vlib_set_trace_count (vm, node, --n_trace);
369 tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
370 tr->next_index = next0;
371 tr->hw_if_index = vif->hw_if_index;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200372 tr->len = len;
Mohsin Kazmi049a2ea2021-11-11 19:17:27 +0100373 clib_memcpy_fast (&tr->hdr, hdr, (hdr_sz == 12) ? 12 : 10);
Damjan Marion8389fb92017-10-13 18:29:53 +0200374 }
375
376 /* enqueue buffer */
377 to_next[0] = bi0;
378 vring->desc_in_use--;
379 to_next += 1;
380 n_left_to_next--;
381 n_left--;
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100382 increment_last (last, packed, vring);
Damjan Marion8389fb92017-10-13 18:29:53 +0200383
Damjan Mariond96b28a2020-10-19 17:15:58 +0200384 /* only tun interfaces may have different next index */
385 if (type == VIRTIO_IF_TYPE_TUN)
386 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
387 n_left_to_next, bi0, next0);
Damjan Marion8389fb92017-10-13 18:29:53 +0200388
389 /* next packet */
390 n_rx_packets++;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200391 n_rx_bytes += len;
Damjan Marion8389fb92017-10-13 18:29:53 +0200392 }
393 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
394 }
395 vring->last_used_idx = last;
396
397 vlib_increment_combined_counter (vnm->interface_main.combined_sw_if_counters
398 + VNET_INTERFACE_COUNTER_RX, thread_index,
Steven Luongefa119d2019-08-30 10:49:44 -0700399 vif->sw_if_index, n_rx_packets,
Damjan Marion8389fb92017-10-13 18:29:53 +0200400 n_rx_bytes);
401
Damjan Marion8389fb92017-10-13 18:29:53 +0200402 return n_rx_packets;
403}
404
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200405static_always_inline uword
406virtio_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
407 vlib_frame_t * frame, virtio_if_t * vif, u16 qid,
408 virtio_if_type_t type)
409{
Damjan Marion4769ed92020-10-18 14:00:43 +0200410 virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, qid);
411 const int hdr_sz = vif->virtio_net_hdr_sz;
Damjan Marion4769ed92020-10-18 14:00:43 +0200412 uword rv;
413
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100414 if (vif->is_packed)
415 {
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100416 if (vif->gso_enabled)
417 rv =
418 virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
419 1, 1, 1);
420 else if (vif->csum_offload_enabled)
421 rv =
422 virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
423 0, 1, 1);
424 else
425 rv =
426 virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
427 0, 0, 1);
428
429 virtio_refill_vring_packed (vm, vif, type, vring, hdr_sz,
430 node->node_index);
431 }
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200432 else
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100433 {
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100434 if (vif->gso_enabled)
435 rv =
436 virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
437 1, 1, 0);
438 else if (vif->csum_offload_enabled)
439 rv =
440 virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
441 0, 1, 0);
442 else
443 rv =
444 virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
445 0, 0, 0);
446
447 virtio_refill_vring_split (vm, vif, type, vring, hdr_sz,
448 node->node_index);
449 }
Damjan Marion4769ed92020-10-18 14:00:43 +0200450 return rv;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200451}
452
Filip Tehlar608996d2019-03-04 03:03:13 -0800453VLIB_NODE_FN (virtio_input_node) (vlib_main_t * vm,
454 vlib_node_runtime_t * node,
455 vlib_frame_t * frame)
Damjan Marion8389fb92017-10-13 18:29:53 +0200456{
457 u32 n_rx = 0;
Damjan Marion94100532020-11-06 23:25:57 +0100458 virtio_main_t *vim = &virtio_main;
459 vnet_hw_if_rxq_poll_vector_t *p,
460 *pv = vnet_hw_if_get_rxq_poll_vector (vm, node);
Damjan Marion8389fb92017-10-13 18:29:53 +0200461
Damjan Marion94100532020-11-06 23:25:57 +0100462 vec_foreach (p, pv)
463 {
464 virtio_if_t *vif;
465 vif = vec_elt_at_index (vim->interfaces, p->dev_instance);
466 if (vif->flags & VIRTIO_IF_FLAG_ADMIN_UP)
467 {
468 if (vif->type == VIRTIO_IF_TYPE_TAP)
469 n_rx += virtio_device_input_inline (
470 vm, node, frame, vif, p->queue_id, VIRTIO_IF_TYPE_TAP);
471 else if (vif->type == VIRTIO_IF_TYPE_PCI)
472 n_rx += virtio_device_input_inline (
473 vm, node, frame, vif, p->queue_id, VIRTIO_IF_TYPE_PCI);
474 else if (vif->type == VIRTIO_IF_TYPE_TUN)
475 n_rx += virtio_device_input_inline (
476 vm, node, frame, vif, p->queue_id, VIRTIO_IF_TYPE_TUN);
477 }
478 }
Damjan Marion8389fb92017-10-13 18:29:53 +0200479
480 return n_rx;
481}
482
483/* *INDENT-OFF* */
484VLIB_REGISTER_NODE (virtio_input_node) = {
Damjan Marion8389fb92017-10-13 18:29:53 +0200485 .name = "virtio-input",
486 .sibling_of = "device-input",
487 .format_trace = format_virtio_input_trace,
Damjan Marion7ca5aaa2019-09-24 18:10:49 +0200488 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
Damjan Marion8389fb92017-10-13 18:29:53 +0200489 .type = VLIB_NODE_TYPE_INPUT,
490 .state = VLIB_NODE_STATE_INTERRUPT,
Mohsin Kazmiddd21832019-01-22 13:05:00 +0000491 .n_errors = VIRTIO_INPUT_N_ERROR,
Damjan Marion8389fb92017-10-13 18:29:53 +0200492 .error_strings = virtio_input_error_strings,
493};
Damjan Marion8389fb92017-10-13 18:29:53 +0200494/* *INDENT-ON* */
495
496/*
497 * fd.io coding-style-patch-verification: ON
498 *
499 * Local Variables:
500 * eval: (c-set-style "gnu")
501 * End:
502 */