Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1 | /* |
| 2 | *------------------------------------------------------------------ |
| 3 | * vhost-user-output |
| 4 | * |
| 5 | * Copyright (c) 2014-2018 Cisco and/or its affiliates. |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at: |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | *------------------------------------------------------------------ |
| 18 | */ |
| 19 | |
Steven Luong | 4208a4c | 2019-05-06 08:51:56 -0700 | [diff] [blame] | 20 | #include <stddef.h> |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 21 | #include <fcntl.h> /* for open */ |
| 22 | #include <sys/ioctl.h> |
| 23 | #include <sys/socket.h> |
| 24 | #include <sys/un.h> |
| 25 | #include <sys/stat.h> |
| 26 | #include <sys/types.h> |
| 27 | #include <sys/uio.h> /* for iovec */ |
| 28 | #include <netinet/in.h> |
| 29 | #include <sys/vfs.h> |
| 30 | |
| 31 | #include <linux/if_arp.h> |
| 32 | #include <linux/if_tun.h> |
| 33 | |
| 34 | #include <vlib/vlib.h> |
| 35 | #include <vlib/unix/unix.h> |
| 36 | |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 37 | #include <vnet/ethernet/ethernet.h> |
| 38 | #include <vnet/devices/devices.h> |
| 39 | #include <vnet/feature/feature.h> |
| 40 | |
| 41 | #include <vnet/devices/virtio/vhost_user.h> |
| 42 | #include <vnet/devices/virtio/vhost_user_inline.h> |
| 43 | |
Mohsin Kazmi | 0b04209 | 2020-04-17 16:50:56 +0000 | [diff] [blame] | 44 | #include <vnet/gso/hdr_offset_parser.h> |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 45 | /* |
| 46 | * On the transmit side, we keep processing the buffers from vlib in the while |
| 47 | * loop and prepare the copy order to be executed later. However, the static |
| 48 | * array which we keep the copy order is limited to VHOST_USER_COPY_ARRAY_N |
| 49 | * entries. In order to not corrupt memory, we have to do the copy when the |
| 50 | * static array reaches the copy threshold. We subtract 40 in case the code |
| 51 | * goes into the inner loop for a maximum of 64k frames which may require |
Steven Luong | 7331005 | 2019-10-23 13:28:37 -0700 | [diff] [blame] | 52 | * more array entries. We subtract 200 because our default buffer size is |
| 53 | * 2048 and the default desc len is likely 1536. While it takes less than 40 |
| 54 | * vlib buffers for the jumbo frame, it may take twice as much descriptors |
| 55 | * for the same jumbo frame. Use 200 for the extra head room. |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 56 | */ |
Steven Luong | 7331005 | 2019-10-23 13:28:37 -0700 | [diff] [blame] | 57 | #define VHOST_USER_TX_COPY_THRESHOLD (VHOST_USER_COPY_ARRAY_N - 200) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 58 | |
BenoƮt Ganne | 47727c0 | 2019-02-12 13:35:08 +0100 | [diff] [blame] | 59 | extern vnet_device_class_t vhost_user_device_class; |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 60 | |
| 61 | #define foreach_vhost_user_tx_func_error \ |
| 62 | _(NONE, "no error") \ |
| 63 | _(NOT_READY, "vhost vring not ready") \ |
| 64 | _(DOWN, "vhost interface is down") \ |
| 65 | _(PKT_DROP_NOBUF, "tx packet drops (no available descriptors)") \ |
| 66 | _(PKT_DROP_NOMRG, "tx packet drops (cannot merge descriptors)") \ |
| 67 | _(MMAP_FAIL, "mmap failure") \ |
| 68 | _(INDIRECT_OVERFLOW, "indirect descriptor table overflow") |
| 69 | |
| 70 | typedef enum |
| 71 | { |
| 72 | #define _(f,s) VHOST_USER_TX_FUNC_ERROR_##f, |
| 73 | foreach_vhost_user_tx_func_error |
| 74 | #undef _ |
| 75 | VHOST_USER_TX_FUNC_N_ERROR, |
| 76 | } vhost_user_tx_func_error_t; |
| 77 | |
| 78 | static __clib_unused char *vhost_user_tx_func_error_strings[] = { |
| 79 | #define _(n,s) s, |
| 80 | foreach_vhost_user_tx_func_error |
| 81 | #undef _ |
| 82 | }; |
| 83 | |
| 84 | static __clib_unused u8 * |
| 85 | format_vhost_user_interface_name (u8 * s, va_list * args) |
| 86 | { |
| 87 | u32 i = va_arg (*args, u32); |
| 88 | u32 show_dev_instance = ~0; |
| 89 | vhost_user_main_t *vum = &vhost_user_main; |
| 90 | |
| 91 | if (i < vec_len (vum->show_dev_instance_by_real_dev_instance)) |
| 92 | show_dev_instance = vum->show_dev_instance_by_real_dev_instance[i]; |
| 93 | |
| 94 | if (show_dev_instance != ~0) |
| 95 | i = show_dev_instance; |
| 96 | |
| 97 | s = format (s, "VirtualEthernet0/0/%d", i); |
| 98 | return s; |
| 99 | } |
| 100 | |
| 101 | static __clib_unused int |
| 102 | vhost_user_name_renumber (vnet_hw_interface_t * hi, u32 new_dev_instance) |
| 103 | { |
| 104 | // FIXME: check if the new dev instance is already used |
| 105 | vhost_user_main_t *vum = &vhost_user_main; |
Jerome Tollet | 2f54c27 | 2018-10-02 11:41:11 +0200 | [diff] [blame] | 106 | vhost_user_intf_t *vui = pool_elt_at_index (vum->vhost_user_interfaces, |
| 107 | hi->dev_instance); |
| 108 | |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 109 | vec_validate_init_empty (vum->show_dev_instance_by_real_dev_instance, |
| 110 | hi->dev_instance, ~0); |
| 111 | |
| 112 | vum->show_dev_instance_by_real_dev_instance[hi->dev_instance] = |
| 113 | new_dev_instance; |
| 114 | |
Jerome Tollet | 2f54c27 | 2018-10-02 11:41:11 +0200 | [diff] [blame] | 115 | vu_log_debug (vui, "renumbered vhost-user interface dev_instance %d to %d", |
| 116 | hi->dev_instance, new_dev_instance); |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 117 | |
| 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | /** |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 122 | * @brief Spin until the vring is successfully locked |
| 123 | */ |
| 124 | static_always_inline void |
| 125 | vhost_user_vring_lock (vhost_user_intf_t * vui, u32 qid) |
| 126 | { |
Steven Luong | 2c1084a | 2020-12-10 20:44:22 -0800 | [diff] [blame] | 127 | clib_spinlock_lock_if_init (&vui->vrings[qid].vring_lock); |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 128 | } |
| 129 | |
| 130 | /** |
| 131 | * @brief Unlock the vring lock |
| 132 | */ |
| 133 | static_always_inline void |
| 134 | vhost_user_vring_unlock (vhost_user_intf_t * vui, u32 qid) |
| 135 | { |
Steven Luong | 2c1084a | 2020-12-10 20:44:22 -0800 | [diff] [blame] | 136 | clib_spinlock_unlock_if_init (&vui->vrings[qid].vring_lock); |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | static_always_inline void |
| 140 | vhost_user_tx_trace (vhost_trace_t * t, |
| 141 | vhost_user_intf_t * vui, u16 qid, |
| 142 | vlib_buffer_t * b, vhost_user_vring_t * rxvq) |
| 143 | { |
| 144 | vhost_user_main_t *vum = &vhost_user_main; |
| 145 | u32 last_avail_idx = rxvq->last_avail_idx; |
| 146 | u32 desc_current = rxvq->avail->ring[last_avail_idx & rxvq->qsz_mask]; |
| 147 | vring_desc_t *hdr_desc = 0; |
| 148 | u32 hint = 0; |
| 149 | |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 150 | clib_memset (t, 0, sizeof (*t)); |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 151 | t->device_index = vui - vum->vhost_user_interfaces; |
| 152 | t->qid = qid; |
| 153 | |
| 154 | hdr_desc = &rxvq->desc[desc_current]; |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 155 | if (rxvq->desc[desc_current].flags & VRING_DESC_F_INDIRECT) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 156 | { |
| 157 | t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_INDIRECT; |
| 158 | /* Header is the first here */ |
| 159 | hdr_desc = map_guest_mem (vui, rxvq->desc[desc_current].addr, &hint); |
| 160 | } |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 161 | if (rxvq->desc[desc_current].flags & VRING_DESC_F_NEXT) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 162 | { |
| 163 | t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SIMPLE_CHAINED; |
| 164 | } |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 165 | if (!(rxvq->desc[desc_current].flags & VRING_DESC_F_NEXT) && |
| 166 | !(rxvq->desc[desc_current].flags & VRING_DESC_F_INDIRECT)) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 167 | { |
| 168 | t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SINGLE_DESC; |
| 169 | } |
| 170 | |
| 171 | t->first_desc_len = hdr_desc ? hdr_desc->len : 0; |
| 172 | } |
| 173 | |
| 174 | static_always_inline u32 |
| 175 | vhost_user_tx_copy (vhost_user_intf_t * vui, vhost_copy_t * cpy, |
| 176 | u16 copy_len, u32 * map_hint) |
| 177 | { |
| 178 | void *dst0, *dst1, *dst2, *dst3; |
| 179 | if (PREDICT_TRUE (copy_len >= 4)) |
| 180 | { |
| 181 | if (PREDICT_FALSE (!(dst2 = map_guest_mem (vui, cpy[0].dst, map_hint)))) |
| 182 | return 1; |
| 183 | if (PREDICT_FALSE (!(dst3 = map_guest_mem (vui, cpy[1].dst, map_hint)))) |
| 184 | return 1; |
| 185 | while (PREDICT_TRUE (copy_len >= 4)) |
| 186 | { |
| 187 | dst0 = dst2; |
| 188 | dst1 = dst3; |
| 189 | |
| 190 | if (PREDICT_FALSE |
| 191 | (!(dst2 = map_guest_mem (vui, cpy[2].dst, map_hint)))) |
| 192 | return 1; |
| 193 | if (PREDICT_FALSE |
| 194 | (!(dst3 = map_guest_mem (vui, cpy[3].dst, map_hint)))) |
| 195 | return 1; |
| 196 | |
| 197 | CLIB_PREFETCH ((void *) cpy[2].src, 64, LOAD); |
| 198 | CLIB_PREFETCH ((void *) cpy[3].src, 64, LOAD); |
| 199 | |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 200 | clib_memcpy_fast (dst0, (void *) cpy[0].src, cpy[0].len); |
| 201 | clib_memcpy_fast (dst1, (void *) cpy[1].src, cpy[1].len); |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 202 | |
| 203 | vhost_user_log_dirty_pages_2 (vui, cpy[0].dst, cpy[0].len, 1); |
| 204 | vhost_user_log_dirty_pages_2 (vui, cpy[1].dst, cpy[1].len, 1); |
| 205 | copy_len -= 2; |
| 206 | cpy += 2; |
| 207 | } |
| 208 | } |
| 209 | while (copy_len) |
| 210 | { |
| 211 | if (PREDICT_FALSE (!(dst0 = map_guest_mem (vui, cpy->dst, map_hint)))) |
| 212 | return 1; |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 213 | clib_memcpy_fast (dst0, (void *) cpy->src, cpy->len); |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 214 | vhost_user_log_dirty_pages_2 (vui, cpy->dst, cpy->len, 1); |
| 215 | copy_len -= 1; |
| 216 | cpy += 1; |
| 217 | } |
| 218 | return 0; |
| 219 | } |
| 220 | |
Steven Luong | 4208a4c | 2019-05-06 08:51:56 -0700 | [diff] [blame] | 221 | static_always_inline void |
| 222 | vhost_user_handle_tx_offload (vhost_user_intf_t * vui, vlib_buffer_t * b, |
| 223 | virtio_net_hdr_t * hdr) |
| 224 | { |
Mohsin Kazmi | 0b04209 | 2020-04-17 16:50:56 +0000 | [diff] [blame] | 225 | generic_header_offset_t gho = { 0 }; |
Mohsin Kazmi | 84f91fa | 2020-04-23 17:59:49 +0200 | [diff] [blame] | 226 | int is_ip4 = b->flags & VNET_BUFFER_F_IS_IP4; |
| 227 | int is_ip6 = b->flags & VNET_BUFFER_F_IS_IP6; |
| 228 | |
| 229 | ASSERT (!(is_ip4 && is_ip6)); |
| 230 | vnet_generic_header_offset_parser (b, &gho, 1 /* l2 */ , is_ip4, is_ip6); |
Mohsin Kazmi | affc5f6 | 2019-12-26 20:42:18 +0100 | [diff] [blame] | 231 | if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM) |
| 232 | { |
| 233 | ip4_header_t *ip4; |
| 234 | |
| 235 | ip4 = |
| 236 | (ip4_header_t *) (vlib_buffer_get_current (b) + gho.l3_hdr_offset); |
| 237 | ip4->checksum = ip4_header_checksum (ip4); |
| 238 | } |
| 239 | |
Steven Luong | 4208a4c | 2019-05-06 08:51:56 -0700 | [diff] [blame] | 240 | /* checksum offload */ |
| 241 | if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM) |
| 242 | { |
| 243 | hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; |
Mohsin Kazmi | affc5f6 | 2019-12-26 20:42:18 +0100 | [diff] [blame] | 244 | hdr->csum_start = gho.l4_hdr_offset; |
Steven Luong | 4208a4c | 2019-05-06 08:51:56 -0700 | [diff] [blame] | 245 | hdr->csum_offset = offsetof (udp_header_t, checksum); |
| 246 | } |
| 247 | else if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM) |
| 248 | { |
| 249 | hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; |
Mohsin Kazmi | affc5f6 | 2019-12-26 20:42:18 +0100 | [diff] [blame] | 250 | hdr->csum_start = gho.l4_hdr_offset; |
Steven Luong | 4208a4c | 2019-05-06 08:51:56 -0700 | [diff] [blame] | 251 | hdr->csum_offset = offsetof (tcp_header_t, checksum); |
| 252 | } |
| 253 | |
| 254 | /* GSO offload */ |
| 255 | if (b->flags & VNET_BUFFER_F_GSO) |
| 256 | { |
| 257 | if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM) |
| 258 | { |
Mohsin Kazmi | 84f91fa | 2020-04-23 17:59:49 +0200 | [diff] [blame] | 259 | if (is_ip4 && |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 260 | (vui->features & VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO4))) |
Steven Luong | 4208a4c | 2019-05-06 08:51:56 -0700 | [diff] [blame] | 261 | { |
| 262 | hdr->gso_size = vnet_buffer2 (b)->gso_size; |
| 263 | hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4; |
| 264 | } |
Mohsin Kazmi | 84f91fa | 2020-04-23 17:59:49 +0200 | [diff] [blame] | 265 | else if (is_ip6 && |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 266 | (vui->features & VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO6))) |
Steven Luong | 4208a4c | 2019-05-06 08:51:56 -0700 | [diff] [blame] | 267 | { |
| 268 | hdr->gso_size = vnet_buffer2 (b)->gso_size; |
| 269 | hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6; |
| 270 | } |
| 271 | } |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 272 | else if ((vui->features & VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_UFO)) && |
Steven Luong | 4208a4c | 2019-05-06 08:51:56 -0700 | [diff] [blame] | 273 | (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)) |
| 274 | { |
| 275 | hdr->gso_size = vnet_buffer2 (b)->gso_size; |
| 276 | hdr->gso_type = VIRTIO_NET_HDR_GSO_UDP; |
| 277 | } |
| 278 | } |
| 279 | } |
| 280 | |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 281 | static_always_inline void |
Steven Luong | 27ba500 | 2020-11-17 13:30:44 -0800 | [diff] [blame] | 282 | vhost_user_mark_desc_available (vlib_main_t * vm, vhost_user_intf_t * vui, |
| 283 | vhost_user_vring_t * rxvq, |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 284 | u16 * n_descs_processed, u8 chained, |
| 285 | vlib_frame_t * frame, u32 n_left) |
| 286 | { |
| 287 | u16 desc_idx, flags; |
| 288 | vring_packed_desc_t *desc_table = rxvq->packed_desc; |
| 289 | u16 last_used_idx = rxvq->last_used_idx; |
| 290 | |
| 291 | if (PREDICT_FALSE (*n_descs_processed == 0)) |
| 292 | return; |
| 293 | |
| 294 | if (rxvq->used_wrap_counter) |
| 295 | flags = desc_table[last_used_idx & rxvq->qsz_mask].flags | |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 296 | (VRING_DESC_F_AVAIL | VRING_DESC_F_USED); |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 297 | else |
| 298 | flags = desc_table[last_used_idx & rxvq->qsz_mask].flags & |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 299 | ~(VRING_DESC_F_AVAIL | VRING_DESC_F_USED); |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 300 | |
| 301 | vhost_user_advance_last_used_idx (rxvq); |
| 302 | |
| 303 | for (desc_idx = 1; desc_idx < *n_descs_processed; desc_idx++) |
| 304 | { |
| 305 | if (rxvq->used_wrap_counter) |
| 306 | desc_table[rxvq->last_used_idx & rxvq->qsz_mask].flags |= |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 307 | (VRING_DESC_F_AVAIL | VRING_DESC_F_USED); |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 308 | else |
| 309 | desc_table[rxvq->last_used_idx & rxvq->qsz_mask].flags &= |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 310 | ~(VRING_DESC_F_AVAIL | VRING_DESC_F_USED); |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 311 | vhost_user_advance_last_used_idx (rxvq); |
| 312 | } |
| 313 | |
| 314 | desc_table[last_used_idx & rxvq->qsz_mask].flags = flags; |
| 315 | |
| 316 | *n_descs_processed = 0; |
| 317 | |
| 318 | if (chained) |
| 319 | { |
| 320 | vring_packed_desc_t *desc_table = rxvq->packed_desc; |
| 321 | |
| 322 | while (desc_table[rxvq->last_used_idx & rxvq->qsz_mask].flags & |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 323 | VRING_DESC_F_NEXT) |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 324 | vhost_user_advance_last_used_idx (rxvq); |
| 325 | |
| 326 | /* Advance past the current chained table entries */ |
| 327 | vhost_user_advance_last_used_idx (rxvq); |
| 328 | } |
| 329 | |
| 330 | /* interrupt (call) handling */ |
| 331 | if ((rxvq->callfd_idx != ~0) && |
| 332 | (rxvq->avail_event->flags != VRING_EVENT_F_DISABLE)) |
| 333 | { |
| 334 | vhost_user_main_t *vum = &vhost_user_main; |
| 335 | |
| 336 | rxvq->n_since_last_int += frame->n_vectors - n_left; |
| 337 | if (rxvq->n_since_last_int > vum->coalesce_frames) |
Steven Luong | 27ba500 | 2020-11-17 13:30:44 -0800 | [diff] [blame] | 338 | vhost_user_send_call (vm, vui, rxvq); |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 339 | } |
| 340 | } |
| 341 | |
| 342 | static_always_inline void |
| 343 | vhost_user_tx_trace_packed (vhost_trace_t * t, vhost_user_intf_t * vui, |
| 344 | u16 qid, vlib_buffer_t * b, |
| 345 | vhost_user_vring_t * rxvq) |
| 346 | { |
| 347 | vhost_user_main_t *vum = &vhost_user_main; |
| 348 | u32 last_avail_idx = rxvq->last_avail_idx; |
| 349 | u32 desc_current = last_avail_idx & rxvq->qsz_mask; |
| 350 | vring_packed_desc_t *hdr_desc = 0; |
| 351 | u32 hint = 0; |
| 352 | |
| 353 | clib_memset (t, 0, sizeof (*t)); |
| 354 | t->device_index = vui - vum->vhost_user_interfaces; |
| 355 | t->qid = qid; |
| 356 | |
| 357 | hdr_desc = &rxvq->packed_desc[desc_current]; |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 358 | if (rxvq->packed_desc[desc_current].flags & VRING_DESC_F_INDIRECT) |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 359 | { |
| 360 | t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_INDIRECT; |
| 361 | /* Header is the first here */ |
| 362 | hdr_desc = map_guest_mem (vui, rxvq->packed_desc[desc_current].addr, |
| 363 | &hint); |
| 364 | } |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 365 | if (rxvq->packed_desc[desc_current].flags & VRING_DESC_F_NEXT) |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 366 | { |
| 367 | t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SIMPLE_CHAINED; |
| 368 | } |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 369 | if (!(rxvq->packed_desc[desc_current].flags & VRING_DESC_F_NEXT) && |
| 370 | !(rxvq->packed_desc[desc_current].flags & VRING_DESC_F_INDIRECT)) |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 371 | { |
| 372 | t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SINGLE_DESC; |
| 373 | } |
| 374 | |
| 375 | t->first_desc_len = hdr_desc ? hdr_desc->len : 0; |
| 376 | } |
| 377 | |
| 378 | static_always_inline uword |
| 379 | vhost_user_device_class_packed (vlib_main_t * vm, vlib_node_runtime_t * node, |
| 380 | vlib_frame_t * frame) |
| 381 | { |
| 382 | u32 *buffers = vlib_frame_vector_args (frame); |
| 383 | u32 n_left = frame->n_vectors; |
| 384 | vhost_user_main_t *vum = &vhost_user_main; |
| 385 | vnet_interface_output_runtime_t *rd = (void *) node->runtime_data; |
| 386 | vhost_user_intf_t *vui = |
| 387 | pool_elt_at_index (vum->vhost_user_interfaces, rd->dev_instance); |
| 388 | u32 qid; |
| 389 | vhost_user_vring_t *rxvq; |
| 390 | u8 error; |
| 391 | u32 thread_index = vm->thread_index; |
| 392 | vhost_cpu_t *cpu = &vum->cpus[thread_index]; |
| 393 | u32 map_hint = 0; |
| 394 | u8 retry = 8; |
| 395 | u16 copy_len; |
| 396 | u16 tx_headers_len; |
| 397 | vring_packed_desc_t *desc_table; |
| 398 | u32 or_flags; |
| 399 | u16 desc_head, desc_index, desc_len; |
| 400 | u16 n_descs_processed; |
| 401 | u8 indirect, chained; |
| 402 | |
| 403 | qid = VHOST_VRING_IDX_RX (*vec_elt_at_index (vui->per_cpu_tx_qid, |
| 404 | thread_index)); |
| 405 | rxvq = &vui->vrings[qid]; |
| 406 | |
| 407 | retry: |
| 408 | error = VHOST_USER_TX_FUNC_ERROR_NONE; |
| 409 | tx_headers_len = 0; |
| 410 | copy_len = 0; |
| 411 | n_descs_processed = 0; |
| 412 | |
| 413 | while (n_left > 0) |
| 414 | { |
| 415 | vlib_buffer_t *b0, *current_b0; |
| 416 | uword buffer_map_addr; |
| 417 | u32 buffer_len; |
| 418 | u16 bytes_left; |
| 419 | u32 total_desc_len = 0; |
| 420 | u16 n_entries = 0; |
| 421 | |
| 422 | indirect = 0; |
| 423 | chained = 0; |
| 424 | if (PREDICT_TRUE (n_left > 1)) |
| 425 | vlib_prefetch_buffer_with_index (vm, buffers[1], LOAD); |
| 426 | |
| 427 | b0 = vlib_get_buffer (vm, buffers[0]); |
| 428 | if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) |
| 429 | { |
| 430 | cpu->current_trace = vlib_add_trace (vm, node, b0, |
| 431 | sizeof (*cpu->current_trace)); |
| 432 | vhost_user_tx_trace_packed (cpu->current_trace, vui, qid / 2, b0, |
| 433 | rxvq); |
| 434 | } |
| 435 | |
| 436 | desc_table = rxvq->packed_desc; |
| 437 | desc_head = desc_index = rxvq->last_avail_idx & rxvq->qsz_mask; |
| 438 | if (PREDICT_FALSE (!vhost_user_packed_desc_available (rxvq, desc_head))) |
| 439 | { |
| 440 | error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF; |
| 441 | goto done; |
| 442 | } |
| 443 | /* |
| 444 | * Go deeper in case of indirect descriptor. |
| 445 | * To test it, turn off mrg_rxbuf. |
| 446 | */ |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 447 | if (desc_table[desc_head].flags & VRING_DESC_F_INDIRECT) |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 448 | { |
| 449 | indirect = 1; |
| 450 | if (PREDICT_FALSE (desc_table[desc_head].len < |
| 451 | sizeof (vring_packed_desc_t))) |
| 452 | { |
| 453 | error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW; |
| 454 | goto done; |
| 455 | } |
| 456 | n_entries = desc_table[desc_head].len >> 4; |
| 457 | desc_table = map_guest_mem (vui, desc_table[desc_index].addr, |
| 458 | &map_hint); |
| 459 | if (PREDICT_FALSE (desc_table == 0)) |
| 460 | { |
| 461 | error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL; |
| 462 | goto done; |
| 463 | } |
| 464 | desc_index = 0; |
| 465 | } |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 466 | else if (rxvq->packed_desc[desc_head].flags & VRING_DESC_F_NEXT) |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 467 | chained = 1; |
| 468 | |
| 469 | desc_len = vui->virtio_net_hdr_sz; |
| 470 | buffer_map_addr = desc_table[desc_index].addr; |
| 471 | buffer_len = desc_table[desc_index].len; |
| 472 | |
| 473 | /* Get a header from the header array */ |
| 474 | virtio_net_hdr_mrg_rxbuf_t *hdr = &cpu->tx_headers[tx_headers_len]; |
| 475 | tx_headers_len++; |
| 476 | hdr->hdr.flags = 0; |
| 477 | hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE; |
| 478 | hdr->num_buffers = 1; |
| 479 | |
| 480 | or_flags = (b0->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM) || |
| 481 | (b0->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM) || |
| 482 | (b0->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM); |
| 483 | |
| 484 | /* Guest supports csum offload and buffer requires checksum offload? */ |
| 485 | if (or_flags && |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 486 | (vui->features & VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM))) |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 487 | vhost_user_handle_tx_offload (vui, b0, &hdr->hdr); |
| 488 | |
| 489 | /* Prepare a copy order executed later for the header */ |
| 490 | ASSERT (copy_len < VHOST_USER_COPY_ARRAY_N); |
| 491 | vhost_copy_t *cpy = &cpu->copy[copy_len]; |
| 492 | copy_len++; |
| 493 | cpy->len = vui->virtio_net_hdr_sz; |
| 494 | cpy->dst = buffer_map_addr; |
| 495 | cpy->src = (uword) hdr; |
| 496 | |
| 497 | buffer_map_addr += vui->virtio_net_hdr_sz; |
| 498 | buffer_len -= vui->virtio_net_hdr_sz; |
| 499 | bytes_left = b0->current_length; |
| 500 | current_b0 = b0; |
| 501 | while (1) |
| 502 | { |
| 503 | if (buffer_len == 0) |
| 504 | { |
| 505 | /* Get new output */ |
| 506 | if (chained) |
| 507 | { |
| 508 | /* |
| 509 | * Next one is chained |
| 510 | * Test it with both indirect and mrg_rxbuf off |
| 511 | */ |
| 512 | if (PREDICT_FALSE (!(desc_table[desc_index].flags & |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 513 | VRING_DESC_F_NEXT))) |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 514 | { |
| 515 | /* |
| 516 | * Last descriptor in chain. |
| 517 | * Dequeue queued descriptors for this packet |
| 518 | */ |
| 519 | vhost_user_dequeue_chained_descs (rxvq, |
| 520 | &n_descs_processed); |
| 521 | error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF; |
| 522 | goto done; |
| 523 | } |
| 524 | vhost_user_advance_last_avail_idx (rxvq); |
| 525 | desc_index = rxvq->last_avail_idx & rxvq->qsz_mask; |
| 526 | n_descs_processed++; |
| 527 | buffer_map_addr = desc_table[desc_index].addr; |
| 528 | buffer_len = desc_table[desc_index].len; |
| 529 | total_desc_len += desc_len; |
| 530 | desc_len = 0; |
| 531 | } |
| 532 | else if (indirect) |
| 533 | { |
| 534 | /* |
| 535 | * Indirect table |
| 536 | * Test it with mrg_rxnuf off |
| 537 | */ |
| 538 | if (PREDICT_TRUE (n_entries > 0)) |
| 539 | n_entries--; |
| 540 | else |
| 541 | { |
| 542 | /* Dequeue queued descriptors for this packet */ |
| 543 | vhost_user_dequeue_chained_descs (rxvq, |
| 544 | &n_descs_processed); |
| 545 | error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW; |
| 546 | goto done; |
| 547 | } |
| 548 | total_desc_len += desc_len; |
| 549 | desc_index = (desc_index + 1) & rxvq->qsz_mask; |
| 550 | buffer_map_addr = desc_table[desc_index].addr; |
| 551 | buffer_len = desc_table[desc_index].len; |
| 552 | desc_len = 0; |
| 553 | } |
| 554 | else if (vui->virtio_net_hdr_sz == 12) |
| 555 | { |
| 556 | /* |
| 557 | * MRG is available |
| 558 | * This is the default setting for the guest VM |
| 559 | */ |
| 560 | virtio_net_hdr_mrg_rxbuf_t *hdr = |
| 561 | &cpu->tx_headers[tx_headers_len - 1]; |
| 562 | |
| 563 | desc_table[desc_index].len = desc_len; |
| 564 | vhost_user_advance_last_avail_idx (rxvq); |
| 565 | desc_head = desc_index = |
| 566 | rxvq->last_avail_idx & rxvq->qsz_mask; |
| 567 | hdr->num_buffers++; |
| 568 | n_descs_processed++; |
| 569 | desc_len = 0; |
| 570 | |
| 571 | if (PREDICT_FALSE (!vhost_user_packed_desc_available |
| 572 | (rxvq, desc_index))) |
| 573 | { |
| 574 | /* Dequeue queued descriptors for this packet */ |
| 575 | vhost_user_dequeue_descs (rxvq, hdr, |
| 576 | &n_descs_processed); |
| 577 | error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF; |
| 578 | goto done; |
| 579 | } |
| 580 | |
| 581 | buffer_map_addr = desc_table[desc_index].addr; |
| 582 | buffer_len = desc_table[desc_index].len; |
| 583 | } |
| 584 | else |
| 585 | { |
| 586 | error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOMRG; |
| 587 | goto done; |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | ASSERT (copy_len < VHOST_USER_COPY_ARRAY_N); |
| 592 | vhost_copy_t *cpy = &cpu->copy[copy_len]; |
| 593 | copy_len++; |
| 594 | cpy->len = bytes_left; |
| 595 | cpy->len = (cpy->len > buffer_len) ? buffer_len : cpy->len; |
| 596 | cpy->dst = buffer_map_addr; |
| 597 | cpy->src = (uword) vlib_buffer_get_current (current_b0) + |
| 598 | current_b0->current_length - bytes_left; |
| 599 | |
| 600 | bytes_left -= cpy->len; |
| 601 | buffer_len -= cpy->len; |
| 602 | buffer_map_addr += cpy->len; |
| 603 | desc_len += cpy->len; |
| 604 | |
| 605 | CLIB_PREFETCH (&rxvq->packed_desc, CLIB_CACHE_LINE_BYTES, LOAD); |
| 606 | |
| 607 | /* Check if vlib buffer has more data. If not, get more or break */ |
| 608 | if (PREDICT_TRUE (!bytes_left)) |
| 609 | { |
| 610 | if (PREDICT_FALSE |
| 611 | (current_b0->flags & VLIB_BUFFER_NEXT_PRESENT)) |
| 612 | { |
| 613 | current_b0 = vlib_get_buffer (vm, current_b0->next_buffer); |
| 614 | bytes_left = current_b0->current_length; |
| 615 | } |
| 616 | else |
| 617 | { |
| 618 | /* End of packet */ |
| 619 | break; |
| 620 | } |
| 621 | } |
| 622 | } |
| 623 | |
| 624 | /* Move from available to used ring */ |
| 625 | total_desc_len += desc_len; |
| 626 | rxvq->packed_desc[desc_head].len = total_desc_len; |
| 627 | |
| 628 | vhost_user_advance_last_avail_table_idx (vui, rxvq, chained); |
| 629 | n_descs_processed++; |
| 630 | |
| 631 | if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) |
| 632 | cpu->current_trace->hdr = cpu->tx_headers[tx_headers_len - 1]; |
| 633 | |
| 634 | n_left--; |
| 635 | |
| 636 | /* |
| 637 | * Do the copy periodically to prevent |
| 638 | * cpu->copy array overflow and corrupt memory |
| 639 | */ |
| 640 | if (PREDICT_FALSE (copy_len >= VHOST_USER_TX_COPY_THRESHOLD) || chained) |
| 641 | { |
| 642 | if (PREDICT_FALSE (vhost_user_tx_copy (vui, cpu->copy, copy_len, |
| 643 | &map_hint))) |
| 644 | vlib_error_count (vm, node->node_index, |
| 645 | VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL, 1); |
| 646 | copy_len = 0; |
| 647 | |
| 648 | /* give buffers back to driver */ |
Steven Luong | 27ba500 | 2020-11-17 13:30:44 -0800 | [diff] [blame] | 649 | vhost_user_mark_desc_available (vm, vui, rxvq, &n_descs_processed, |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 650 | chained, frame, n_left); |
| 651 | } |
| 652 | |
| 653 | buffers++; |
| 654 | } |
| 655 | |
| 656 | done: |
| 657 | if (PREDICT_TRUE (copy_len)) |
| 658 | { |
| 659 | if (PREDICT_FALSE (vhost_user_tx_copy (vui, cpu->copy, copy_len, |
| 660 | &map_hint))) |
| 661 | vlib_error_count (vm, node->node_index, |
| 662 | VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL, 1); |
| 663 | |
Steven Luong | 27ba500 | 2020-11-17 13:30:44 -0800 | [diff] [blame] | 664 | vhost_user_mark_desc_available (vm, vui, rxvq, &n_descs_processed, |
| 665 | chained, frame, n_left); |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 666 | } |
| 667 | |
| 668 | /* |
| 669 | * When n_left is set, error is always set to something too. |
| 670 | * In case error is due to lack of remaining buffers, we go back up and |
| 671 | * retry. |
| 672 | * The idea is that it is better to waste some time on packets |
| 673 | * that have been processed already than dropping them and get |
| 674 | * more fresh packets with a good likelyhood that they will be dropped too. |
| 675 | * This technique also gives more time to VM driver to pick-up packets. |
| 676 | * In case the traffic flows from physical to virtual interfaces, this |
| 677 | * technique will end-up leveraging the physical NIC buffer in order to |
| 678 | * absorb the VM's CPU jitter. |
| 679 | */ |
| 680 | if (n_left && (error == VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF) && retry) |
| 681 | { |
| 682 | retry--; |
| 683 | goto retry; |
| 684 | } |
| 685 | |
| 686 | vhost_user_vring_unlock (vui, qid); |
| 687 | |
| 688 | if (PREDICT_FALSE (n_left && error != VHOST_USER_TX_FUNC_ERROR_NONE)) |
| 689 | { |
| 690 | vlib_error_count (vm, node->node_index, error, n_left); |
| 691 | vlib_increment_simple_counter |
| 692 | (vnet_main.interface_main.sw_if_counters + |
| 693 | VNET_INTERFACE_COUNTER_DROP, thread_index, vui->sw_if_index, n_left); |
| 694 | } |
| 695 | |
| 696 | vlib_buffer_free (vm, vlib_frame_vector_args (frame), frame->n_vectors); |
| 697 | return frame->n_vectors; |
| 698 | } |
| 699 | |
Mohsin Kazmi | dd8e7d0 | 2018-07-23 14:45:57 +0200 | [diff] [blame] | 700 | VNET_DEVICE_CLASS_TX_FN (vhost_user_device_class) (vlib_main_t * vm, |
| 701 | vlib_node_runtime_t * |
| 702 | node, vlib_frame_t * frame) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 703 | { |
Damjan Marion | a3d5986 | 2018-11-10 10:23:00 +0100 | [diff] [blame] | 704 | u32 *buffers = vlib_frame_vector_args (frame); |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 705 | u32 n_left = frame->n_vectors; |
| 706 | vhost_user_main_t *vum = &vhost_user_main; |
| 707 | vnet_interface_output_runtime_t *rd = (void *) node->runtime_data; |
| 708 | vhost_user_intf_t *vui = |
| 709 | pool_elt_at_index (vum->vhost_user_interfaces, rd->dev_instance); |
| 710 | u32 qid = ~0; |
| 711 | vhost_user_vring_t *rxvq; |
| 712 | u8 error; |
Damjan Marion | 067cd62 | 2018-07-11 12:47:43 +0200 | [diff] [blame] | 713 | u32 thread_index = vm->thread_index; |
Damjan Marion | 7e0b17d | 2018-11-20 21:07:03 +0100 | [diff] [blame] | 714 | vhost_cpu_t *cpu = &vum->cpus[thread_index]; |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 715 | u32 map_hint = 0; |
| 716 | u8 retry = 8; |
| 717 | u16 copy_len; |
| 718 | u16 tx_headers_len; |
Steven Luong | 564e167 | 2020-01-30 15:18:45 -0800 | [diff] [blame] | 719 | u32 or_flags; |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 720 | |
| 721 | if (PREDICT_FALSE (!vui->admin_up)) |
| 722 | { |
| 723 | error = VHOST_USER_TX_FUNC_ERROR_DOWN; |
| 724 | goto done3; |
| 725 | } |
| 726 | |
Juraj Sloboda | b192feb | 2018-10-01 12:42:07 +0200 | [diff] [blame] | 727 | if (PREDICT_FALSE (!vui->is_ready)) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 728 | { |
| 729 | error = VHOST_USER_TX_FUNC_ERROR_NOT_READY; |
| 730 | goto done3; |
| 731 | } |
| 732 | |
Damjan Marion | 7e0b17d | 2018-11-20 21:07:03 +0100 | [diff] [blame] | 733 | qid = VHOST_VRING_IDX_RX (*vec_elt_at_index (vui->per_cpu_tx_qid, |
| 734 | thread_index)); |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 735 | rxvq = &vui->vrings[qid]; |
Steven | 0c46998 | 2018-11-04 08:20:01 -0800 | [diff] [blame] | 736 | if (PREDICT_FALSE (rxvq->avail == 0)) |
| 737 | { |
| 738 | error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL; |
| 739 | goto done3; |
| 740 | } |
| 741 | |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 742 | if (PREDICT_FALSE (vui->use_tx_spinlock)) |
| 743 | vhost_user_vring_lock (vui, qid); |
| 744 | |
Steven Luong | bc0d9ff | 2020-03-23 09:34:59 -0700 | [diff] [blame] | 745 | if (vhost_user_is_packed_ring_supported (vui)) |
| 746 | return (vhost_user_device_class_packed (vm, node, frame)); |
| 747 | |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 748 | retry: |
| 749 | error = VHOST_USER_TX_FUNC_ERROR_NONE; |
| 750 | tx_headers_len = 0; |
| 751 | copy_len = 0; |
| 752 | while (n_left > 0) |
| 753 | { |
| 754 | vlib_buffer_t *b0, *current_b0; |
| 755 | u16 desc_head, desc_index, desc_len; |
| 756 | vring_desc_t *desc_table; |
| 757 | uword buffer_map_addr; |
| 758 | u32 buffer_len; |
| 759 | u16 bytes_left; |
| 760 | |
| 761 | if (PREDICT_TRUE (n_left > 1)) |
| 762 | vlib_prefetch_buffer_with_index (vm, buffers[1], LOAD); |
| 763 | |
| 764 | b0 = vlib_get_buffer (vm, buffers[0]); |
| 765 | |
| 766 | if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) |
| 767 | { |
Damjan Marion | 7e0b17d | 2018-11-20 21:07:03 +0100 | [diff] [blame] | 768 | cpu->current_trace = vlib_add_trace (vm, node, b0, |
| 769 | sizeof (*cpu->current_trace)); |
| 770 | vhost_user_tx_trace (cpu->current_trace, vui, qid / 2, b0, rxvq); |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 771 | } |
| 772 | |
| 773 | if (PREDICT_FALSE (rxvq->last_avail_idx == rxvq->avail->idx)) |
| 774 | { |
| 775 | error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF; |
| 776 | goto done; |
| 777 | } |
| 778 | |
| 779 | desc_table = rxvq->desc; |
| 780 | desc_head = desc_index = |
| 781 | rxvq->avail->ring[rxvq->last_avail_idx & rxvq->qsz_mask]; |
| 782 | |
| 783 | /* Go deeper in case of indirect descriptor |
| 784 | * I don't know of any driver providing indirect for RX. */ |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 785 | if (PREDICT_FALSE (rxvq->desc[desc_head].flags & VRING_DESC_F_INDIRECT)) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 786 | { |
| 787 | if (PREDICT_FALSE |
| 788 | (rxvq->desc[desc_head].len < sizeof (vring_desc_t))) |
| 789 | { |
| 790 | error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW; |
| 791 | goto done; |
| 792 | } |
| 793 | if (PREDICT_FALSE |
| 794 | (!(desc_table = |
| 795 | map_guest_mem (vui, rxvq->desc[desc_index].addr, |
| 796 | &map_hint)))) |
| 797 | { |
| 798 | error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL; |
| 799 | goto done; |
| 800 | } |
| 801 | desc_index = 0; |
| 802 | } |
| 803 | |
| 804 | desc_len = vui->virtio_net_hdr_sz; |
| 805 | buffer_map_addr = desc_table[desc_index].addr; |
| 806 | buffer_len = desc_table[desc_index].len; |
| 807 | |
| 808 | { |
| 809 | // Get a header from the header array |
Damjan Marion | 7e0b17d | 2018-11-20 21:07:03 +0100 | [diff] [blame] | 810 | virtio_net_hdr_mrg_rxbuf_t *hdr = &cpu->tx_headers[tx_headers_len]; |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 811 | tx_headers_len++; |
| 812 | hdr->hdr.flags = 0; |
Steven Luong | 4208a4c | 2019-05-06 08:51:56 -0700 | [diff] [blame] | 813 | hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE; |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 814 | hdr->num_buffers = 1; //This is local, no need to check |
| 815 | |
Steven Luong | 564e167 | 2020-01-30 15:18:45 -0800 | [diff] [blame] | 816 | or_flags = (b0->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM) || |
| 817 | (b0->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM) || |
| 818 | (b0->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM); |
| 819 | |
| 820 | /* Guest supports csum offload and buffer requires checksum offload? */ |
| 821 | if (or_flags |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 822 | && (vui->features & VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM))) |
Steven Luong | 4208a4c | 2019-05-06 08:51:56 -0700 | [diff] [blame] | 823 | vhost_user_handle_tx_offload (vui, b0, &hdr->hdr); |
| 824 | |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 825 | // Prepare a copy order executed later for the header |
Steven Luong | 7331005 | 2019-10-23 13:28:37 -0700 | [diff] [blame] | 826 | ASSERT (copy_len < VHOST_USER_COPY_ARRAY_N); |
Damjan Marion | 7e0b17d | 2018-11-20 21:07:03 +0100 | [diff] [blame] | 827 | vhost_copy_t *cpy = &cpu->copy[copy_len]; |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 828 | copy_len++; |
| 829 | cpy->len = vui->virtio_net_hdr_sz; |
| 830 | cpy->dst = buffer_map_addr; |
| 831 | cpy->src = (uword) hdr; |
| 832 | } |
| 833 | |
| 834 | buffer_map_addr += vui->virtio_net_hdr_sz; |
| 835 | buffer_len -= vui->virtio_net_hdr_sz; |
| 836 | bytes_left = b0->current_length; |
| 837 | current_b0 = b0; |
| 838 | while (1) |
| 839 | { |
| 840 | if (buffer_len == 0) |
| 841 | { //Get new output |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 842 | if (desc_table[desc_index].flags & VRING_DESC_F_NEXT) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 843 | { |
| 844 | //Next one is chained |
| 845 | desc_index = desc_table[desc_index].next; |
| 846 | buffer_map_addr = desc_table[desc_index].addr; |
| 847 | buffer_len = desc_table[desc_index].len; |
| 848 | } |
| 849 | else if (vui->virtio_net_hdr_sz == 12) //MRG is available |
| 850 | { |
| 851 | virtio_net_hdr_mrg_rxbuf_t *hdr = |
Damjan Marion | 7e0b17d | 2018-11-20 21:07:03 +0100 | [diff] [blame] | 852 | &cpu->tx_headers[tx_headers_len - 1]; |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 853 | |
| 854 | //Move from available to used buffer |
| 855 | rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].id = |
| 856 | desc_head; |
| 857 | rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].len = |
| 858 | desc_len; |
| 859 | vhost_user_log_dirty_ring (vui, rxvq, |
| 860 | ring[rxvq->last_used_idx & |
| 861 | rxvq->qsz_mask]); |
| 862 | |
| 863 | rxvq->last_avail_idx++; |
| 864 | rxvq->last_used_idx++; |
| 865 | hdr->num_buffers++; |
| 866 | desc_len = 0; |
| 867 | |
| 868 | if (PREDICT_FALSE |
| 869 | (rxvq->last_avail_idx == rxvq->avail->idx)) |
| 870 | { |
| 871 | //Dequeue queued descriptors for this packet |
| 872 | rxvq->last_used_idx -= hdr->num_buffers - 1; |
| 873 | rxvq->last_avail_idx -= hdr->num_buffers - 1; |
| 874 | error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF; |
| 875 | goto done; |
| 876 | } |
| 877 | |
| 878 | desc_table = rxvq->desc; |
| 879 | desc_head = desc_index = |
| 880 | rxvq->avail->ring[rxvq->last_avail_idx & rxvq->qsz_mask]; |
| 881 | if (PREDICT_FALSE |
Mohsin Kazmi | a7a2281 | 2020-08-31 17:17:16 +0200 | [diff] [blame] | 882 | (rxvq->desc[desc_head].flags & VRING_DESC_F_INDIRECT)) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 883 | { |
| 884 | //It is seriously unlikely that a driver will put indirect descriptor |
| 885 | //after non-indirect descriptor. |
| 886 | if (PREDICT_FALSE |
| 887 | (rxvq->desc[desc_head].len < sizeof (vring_desc_t))) |
| 888 | { |
| 889 | error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW; |
| 890 | goto done; |
| 891 | } |
| 892 | if (PREDICT_FALSE |
| 893 | (!(desc_table = |
| 894 | map_guest_mem (vui, |
| 895 | rxvq->desc[desc_index].addr, |
| 896 | &map_hint)))) |
| 897 | { |
| 898 | error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL; |
| 899 | goto done; |
| 900 | } |
| 901 | desc_index = 0; |
| 902 | } |
| 903 | buffer_map_addr = desc_table[desc_index].addr; |
| 904 | buffer_len = desc_table[desc_index].len; |
| 905 | } |
| 906 | else |
| 907 | { |
| 908 | error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOMRG; |
| 909 | goto done; |
| 910 | } |
| 911 | } |
| 912 | |
| 913 | { |
Steven Luong | 7331005 | 2019-10-23 13:28:37 -0700 | [diff] [blame] | 914 | ASSERT (copy_len < VHOST_USER_COPY_ARRAY_N); |
Damjan Marion | 7e0b17d | 2018-11-20 21:07:03 +0100 | [diff] [blame] | 915 | vhost_copy_t *cpy = &cpu->copy[copy_len]; |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 916 | copy_len++; |
| 917 | cpy->len = bytes_left; |
| 918 | cpy->len = (cpy->len > buffer_len) ? buffer_len : cpy->len; |
| 919 | cpy->dst = buffer_map_addr; |
| 920 | cpy->src = (uword) vlib_buffer_get_current (current_b0) + |
| 921 | current_b0->current_length - bytes_left; |
| 922 | |
| 923 | bytes_left -= cpy->len; |
| 924 | buffer_len -= cpy->len; |
| 925 | buffer_map_addr += cpy->len; |
| 926 | desc_len += cpy->len; |
| 927 | |
| 928 | CLIB_PREFETCH (&rxvq->desc, CLIB_CACHE_LINE_BYTES, LOAD); |
| 929 | } |
| 930 | |
| 931 | // Check if vlib buffer has more data. If not, get more or break. |
| 932 | if (PREDICT_TRUE (!bytes_left)) |
| 933 | { |
| 934 | if (PREDICT_FALSE |
| 935 | (current_b0->flags & VLIB_BUFFER_NEXT_PRESENT)) |
| 936 | { |
| 937 | current_b0 = vlib_get_buffer (vm, current_b0->next_buffer); |
| 938 | bytes_left = current_b0->current_length; |
| 939 | } |
| 940 | else |
| 941 | { |
| 942 | //End of packet |
| 943 | break; |
| 944 | } |
| 945 | } |
| 946 | } |
| 947 | |
| 948 | //Move from available to used ring |
| 949 | rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].id = desc_head; |
| 950 | rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].len = desc_len; |
| 951 | vhost_user_log_dirty_ring (vui, rxvq, |
| 952 | ring[rxvq->last_used_idx & rxvq->qsz_mask]); |
| 953 | rxvq->last_avail_idx++; |
| 954 | rxvq->last_used_idx++; |
| 955 | |
| 956 | if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) |
| 957 | { |
Damjan Marion | 7e0b17d | 2018-11-20 21:07:03 +0100 | [diff] [blame] | 958 | cpu->current_trace->hdr = cpu->tx_headers[tx_headers_len - 1]; |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 959 | } |
| 960 | |
| 961 | n_left--; //At the end for error counting when 'goto done' is invoked |
| 962 | |
| 963 | /* |
| 964 | * Do the copy periodically to prevent |
Damjan Marion | 7e0b17d | 2018-11-20 21:07:03 +0100 | [diff] [blame] | 965 | * cpu->copy array overflow and corrupt memory |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 966 | */ |
| 967 | if (PREDICT_FALSE (copy_len >= VHOST_USER_TX_COPY_THRESHOLD)) |
| 968 | { |
Damjan Marion | 7e0b17d | 2018-11-20 21:07:03 +0100 | [diff] [blame] | 969 | if (PREDICT_FALSE (vhost_user_tx_copy (vui, cpu->copy, copy_len, |
| 970 | &map_hint))) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 971 | { |
| 972 | vlib_error_count (vm, node->node_index, |
| 973 | VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL, 1); |
| 974 | } |
| 975 | copy_len = 0; |
| 976 | |
| 977 | /* give buffers back to driver */ |
| 978 | CLIB_MEMORY_BARRIER (); |
| 979 | rxvq->used->idx = rxvq->last_used_idx; |
| 980 | vhost_user_log_dirty_ring (vui, rxvq, idx); |
| 981 | } |
| 982 | buffers++; |
| 983 | } |
| 984 | |
| 985 | done: |
| 986 | //Do the memory copies |
Damjan Marion | 7e0b17d | 2018-11-20 21:07:03 +0100 | [diff] [blame] | 987 | if (PREDICT_FALSE (vhost_user_tx_copy (vui, cpu->copy, copy_len, |
| 988 | &map_hint))) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 989 | { |
| 990 | vlib_error_count (vm, node->node_index, |
| 991 | VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL, 1); |
| 992 | } |
| 993 | |
| 994 | CLIB_MEMORY_BARRIER (); |
| 995 | rxvq->used->idx = rxvq->last_used_idx; |
| 996 | vhost_user_log_dirty_ring (vui, rxvq, idx); |
| 997 | |
| 998 | /* |
| 999 | * When n_left is set, error is always set to something too. |
| 1000 | * In case error is due to lack of remaining buffers, we go back up and |
| 1001 | * retry. |
| 1002 | * The idea is that it is better to waste some time on packets |
| 1003 | * that have been processed already than dropping them and get |
Paul Vinciguerra | 97c998c | 2019-10-29 16:11:09 -0400 | [diff] [blame] | 1004 | * more fresh packets with a good likelihood that they will be dropped too. |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1005 | * This technique also gives more time to VM driver to pick-up packets. |
| 1006 | * In case the traffic flows from physical to virtual interfaces, this |
| 1007 | * technique will end-up leveraging the physical NIC buffer in order to |
| 1008 | * absorb the VM's CPU jitter. |
| 1009 | */ |
| 1010 | if (n_left && (error == VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF) && retry) |
| 1011 | { |
| 1012 | retry--; |
| 1013 | goto retry; |
| 1014 | } |
| 1015 | |
| 1016 | /* interrupt (call) handling */ |
| 1017 | if ((rxvq->callfd_idx != ~0) && |
| 1018 | !(rxvq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT)) |
| 1019 | { |
| 1020 | rxvq->n_since_last_int += frame->n_vectors - n_left; |
| 1021 | |
| 1022 | if (rxvq->n_since_last_int > vum->coalesce_frames) |
Steven Luong | 27ba500 | 2020-11-17 13:30:44 -0800 | [diff] [blame] | 1023 | vhost_user_send_call (vm, vui, rxvq); |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1024 | } |
| 1025 | |
| 1026 | vhost_user_vring_unlock (vui, qid); |
| 1027 | |
| 1028 | done3: |
| 1029 | if (PREDICT_FALSE (n_left && error != VHOST_USER_TX_FUNC_ERROR_NONE)) |
| 1030 | { |
| 1031 | vlib_error_count (vm, node->node_index, error, n_left); |
| 1032 | vlib_increment_simple_counter |
| 1033 | (vnet_main.interface_main.sw_if_counters |
| 1034 | + VNET_INTERFACE_COUNTER_DROP, |
| 1035 | thread_index, vui->sw_if_index, n_left); |
| 1036 | } |
| 1037 | |
Damjan Marion | a3d5986 | 2018-11-10 10:23:00 +0100 | [diff] [blame] | 1038 | vlib_buffer_free (vm, vlib_frame_vector_args (frame), frame->n_vectors); |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1039 | return frame->n_vectors; |
| 1040 | } |
| 1041 | |
| 1042 | static __clib_unused clib_error_t * |
| 1043 | vhost_user_interface_rx_mode_change (vnet_main_t * vnm, u32 hw_if_index, |
Damjan Marion | eabd424 | 2020-10-07 20:59:07 +0200 | [diff] [blame] | 1044 | u32 qid, vnet_hw_if_rx_mode mode) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1045 | { |
| 1046 | vlib_main_t *vm = vnm->vlib_main; |
| 1047 | vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index); |
| 1048 | vhost_user_main_t *vum = &vhost_user_main; |
| 1049 | vhost_user_intf_t *vui = |
| 1050 | pool_elt_at_index (vum->vhost_user_interfaces, hif->dev_instance); |
| 1051 | vhost_user_vring_t *txvq = &vui->vrings[VHOST_VRING_IDX_TX (qid)]; |
| 1052 | |
Damjan Marion | eabd424 | 2020-10-07 20:59:07 +0200 | [diff] [blame] | 1053 | if ((mode == VNET_HW_IF_RX_MODE_INTERRUPT) || |
| 1054 | (mode == VNET_HW_IF_RX_MODE_ADAPTIVE)) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1055 | { |
| 1056 | if (txvq->kickfd_idx == ~0) |
| 1057 | { |
| 1058 | // We cannot support interrupt mode if the driver opts out |
| 1059 | return clib_error_return (0, "Driver does not support interrupt"); |
| 1060 | } |
Damjan Marion | eabd424 | 2020-10-07 20:59:07 +0200 | [diff] [blame] | 1061 | if (txvq->mode == VNET_HW_IF_RX_MODE_POLLING) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1062 | { |
| 1063 | vum->ifq_count++; |
| 1064 | // Start the timer if this is the first encounter on interrupt |
| 1065 | // interface/queue |
| 1066 | if ((vum->ifq_count == 1) && |
| 1067 | (vum->coalesce_time > 0.0) && (vum->coalesce_frames > 0)) |
| 1068 | vlib_process_signal_event (vm, |
| 1069 | vhost_user_send_interrupt_node.index, |
| 1070 | VHOST_USER_EVENT_START_TIMER, 0); |
| 1071 | } |
| 1072 | } |
Damjan Marion | eabd424 | 2020-10-07 20:59:07 +0200 | [diff] [blame] | 1073 | else if (mode == VNET_HW_IF_RX_MODE_POLLING) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1074 | { |
Damjan Marion | eabd424 | 2020-10-07 20:59:07 +0200 | [diff] [blame] | 1075 | if (((txvq->mode == VNET_HW_IF_RX_MODE_INTERRUPT) || |
| 1076 | (txvq->mode == VNET_HW_IF_RX_MODE_ADAPTIVE)) && vum->ifq_count) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1077 | { |
| 1078 | vum->ifq_count--; |
| 1079 | // Stop the timer if there is no more interrupt interface/queue |
| 1080 | if ((vum->ifq_count == 0) && |
| 1081 | (vum->coalesce_time > 0.0) && (vum->coalesce_frames > 0)) |
| 1082 | vlib_process_signal_event (vm, |
| 1083 | vhost_user_send_interrupt_node.index, |
| 1084 | VHOST_USER_EVENT_STOP_TIMER, 0); |
| 1085 | } |
| 1086 | } |
| 1087 | |
| 1088 | txvq->mode = mode; |
Damjan Marion | eabd424 | 2020-10-07 20:59:07 +0200 | [diff] [blame] | 1089 | if (mode == VNET_HW_IF_RX_MODE_POLLING) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1090 | txvq->used->flags = VRING_USED_F_NO_NOTIFY; |
Damjan Marion | eabd424 | 2020-10-07 20:59:07 +0200 | [diff] [blame] | 1091 | else if ((mode == VNET_HW_IF_RX_MODE_ADAPTIVE) || |
| 1092 | (mode == VNET_HW_IF_RX_MODE_INTERRUPT)) |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1093 | txvq->used->flags = 0; |
| 1094 | else |
| 1095 | { |
Jerome Tollet | 2f54c27 | 2018-10-02 11:41:11 +0200 | [diff] [blame] | 1096 | vu_log_err (vui, "unhandled mode %d changed for if %d queue %d", mode, |
| 1097 | hw_if_index, qid); |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1098 | return clib_error_return (0, "unsupported"); |
| 1099 | } |
| 1100 | |
| 1101 | return 0; |
| 1102 | } |
| 1103 | |
| 1104 | static __clib_unused clib_error_t * |
| 1105 | vhost_user_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, |
| 1106 | u32 flags) |
| 1107 | { |
| 1108 | vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index); |
| 1109 | vhost_user_main_t *vum = &vhost_user_main; |
| 1110 | vhost_user_intf_t *vui = |
| 1111 | pool_elt_at_index (vum->vhost_user_interfaces, hif->dev_instance); |
Juraj Sloboda | b192feb | 2018-10-01 12:42:07 +0200 | [diff] [blame] | 1112 | u8 link_old, link_new; |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1113 | |
Juraj Sloboda | b192feb | 2018-10-01 12:42:07 +0200 | [diff] [blame] | 1114 | link_old = vui_is_link_up (vui); |
| 1115 | |
| 1116 | vui->admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0; |
| 1117 | |
| 1118 | link_new = vui_is_link_up (vui); |
| 1119 | |
| 1120 | if (link_old != link_new) |
| 1121 | vnet_hw_interface_set_flags (vnm, vui->hw_if_index, link_new ? |
| 1122 | VNET_HW_INTERFACE_FLAG_LINK_UP : 0); |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1123 | |
| 1124 | return /* no error */ 0; |
| 1125 | } |
| 1126 | |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1127 | /* *INDENT-OFF* */ |
| 1128 | VNET_DEVICE_CLASS (vhost_user_device_class) = { |
| 1129 | .name = "vhost-user", |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1130 | .tx_function_n_errors = VHOST_USER_TX_FUNC_N_ERROR, |
| 1131 | .tx_function_error_strings = vhost_user_tx_func_error_strings, |
| 1132 | .format_device_name = format_vhost_user_interface_name, |
| 1133 | .name_renumber = vhost_user_name_renumber, |
| 1134 | .admin_up_down_function = vhost_user_interface_admin_up_down, |
| 1135 | .rx_mode_change_function = vhost_user_interface_rx_mode_change, |
| 1136 | .format_tx_trace = format_vhost_trace, |
| 1137 | }; |
| 1138 | |
Mohsin Kazmi | e7cde31 | 2018-06-26 17:20:11 +0200 | [diff] [blame] | 1139 | /* *INDENT-ON* */ |
| 1140 | |
| 1141 | /* |
| 1142 | * fd.io coding-style-patch-verification: ON |
| 1143 | * |
| 1144 | * Local Variables: |
| 1145 | * eval: (c-set-style "gnu") |
| 1146 | * End: |
| 1147 | */ |