4 * Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * * Neither the name of Intel Corporation nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 #include <sys/types.h>
43 #ifdef RTE_LIBRTE_VHOST_NUMA
47 #include <rte_common.h>
48 #include <rte_malloc.h>
52 #include "vhost_user.h"
54 static const char *vhost_message_str[VHOST_USER_MAX] = {
55 [VHOST_USER_NONE] = "VHOST_USER_NONE",
56 [VHOST_USER_GET_FEATURES] = "VHOST_USER_GET_FEATURES",
57 [VHOST_USER_SET_FEATURES] = "VHOST_USER_SET_FEATURES",
58 [VHOST_USER_SET_OWNER] = "VHOST_USER_SET_OWNER",
59 [VHOST_USER_RESET_OWNER] = "VHOST_USER_RESET_OWNER",
60 [VHOST_USER_SET_MEM_TABLE] = "VHOST_USER_SET_MEM_TABLE",
61 [VHOST_USER_SET_LOG_BASE] = "VHOST_USER_SET_LOG_BASE",
62 [VHOST_USER_SET_LOG_FD] = "VHOST_USER_SET_LOG_FD",
63 [VHOST_USER_SET_VRING_NUM] = "VHOST_USER_SET_VRING_NUM",
64 [VHOST_USER_SET_VRING_ADDR] = "VHOST_USER_SET_VRING_ADDR",
65 [VHOST_USER_SET_VRING_BASE] = "VHOST_USER_SET_VRING_BASE",
66 [VHOST_USER_GET_VRING_BASE] = "VHOST_USER_GET_VRING_BASE",
67 [VHOST_USER_SET_VRING_KICK] = "VHOST_USER_SET_VRING_KICK",
68 [VHOST_USER_SET_VRING_CALL] = "VHOST_USER_SET_VRING_CALL",
69 [VHOST_USER_SET_VRING_ERR] = "VHOST_USER_SET_VRING_ERR",
70 [VHOST_USER_GET_PROTOCOL_FEATURES] = "VHOST_USER_GET_PROTOCOL_FEATURES",
71 [VHOST_USER_SET_PROTOCOL_FEATURES] = "VHOST_USER_SET_PROTOCOL_FEATURES",
72 [VHOST_USER_GET_QUEUE_NUM] = "VHOST_USER_GET_QUEUE_NUM",
73 [VHOST_USER_SET_VRING_ENABLE] = "VHOST_USER_SET_VRING_ENABLE",
74 [VHOST_USER_SEND_RARP] = "VHOST_USER_SEND_RARP",
83 ret = fstat(fd, &stat);
84 return ret == -1 ? (uint64_t)-1 : (uint64_t)stat.st_blksize;
88 free_mem_region(struct virtio_net *dev)
91 struct virtio_memory_region *reg;
93 if (!dev || !dev->mem)
96 for (i = 0; i < dev->mem->nregions; i++) {
97 reg = &dev->mem->regions[i];
98 if (reg->host_user_addr) {
99 munmap(reg->mmap_addr, reg->mmap_size);
106 vhost_backend_cleanup(struct virtio_net *dev)
109 free_mem_region(dev);
114 free(dev->guest_pages);
115 dev->guest_pages = NULL;
118 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
124 * This function just returns success at the moment unless
125 * the device hasn't been initialised.
128 vhost_user_set_owner(void)
134 vhost_user_reset_owner(struct virtio_net *dev)
136 if (dev->flags & VIRTIO_DEV_RUNNING) {
137 dev->flags &= ~VIRTIO_DEV_RUNNING;
138 notify_ops->destroy_device(dev->vid);
141 cleanup_device(dev, 0);
147 * The features that we support are requested.
150 vhost_user_get_features(void)
152 return VHOST_FEATURES;
156 * We receive the negotiated features supported by us and the virtio device.
159 vhost_user_set_features(struct virtio_net *dev, uint64_t features)
161 if (features & ~VHOST_FEATURES)
164 dev->features = features;
166 ((1 << VIRTIO_NET_F_MRG_RXBUF) | (1ULL << VIRTIO_F_VERSION_1))) {
167 dev->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
169 dev->vhost_hlen = sizeof(struct virtio_net_hdr);
171 LOG_DEBUG(VHOST_CONFIG,
172 "(%d) mergeable RX buffers %s, virtio 1 %s\n",
174 (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off",
175 (dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off");
181 * The virtio device sends us the size of the descriptor ring.
184 vhost_user_set_vring_num(struct virtio_net *dev,
185 struct vhost_vring_state *state)
187 struct vhost_virtqueue *vq = dev->virtqueue[state->index];
189 vq->size = state->num;
191 if (dev->dequeue_zero_copy) {
193 vq->last_zmbuf_idx = 0;
194 vq->zmbuf_size = vq->size;
195 vq->zmbufs = rte_zmalloc(NULL, vq->zmbuf_size *
196 sizeof(struct zcopy_mbuf), 0);
197 if (vq->zmbufs == NULL) {
198 RTE_LOG(WARNING, VHOST_CONFIG,
199 "failed to allocate mem for zero copy; "
200 "zero copy is force disabled\n");
201 dev->dequeue_zero_copy = 0;
205 vq->shadow_used_ring = rte_malloc(NULL,
206 vq->size * sizeof(struct vring_used_elem),
207 RTE_CACHE_LINE_SIZE);
208 if (!vq->shadow_used_ring) {
209 RTE_LOG(ERR, VHOST_CONFIG,
210 "failed to allocate memory for shadow used ring.\n");
218 * Reallocate virtio_dev and vhost_virtqueue data structure to make them on the
219 * same numa node as the memory of vring descriptor.
221 #ifdef RTE_LIBRTE_VHOST_NUMA
222 static struct virtio_net*
223 numa_realloc(struct virtio_net *dev, int index)
225 int oldnode, newnode;
226 struct virtio_net *old_dev;
227 struct vhost_virtqueue *old_vq, *vq;
231 * vq is allocated on pairs, we should try to do realloc
232 * on first queue of one queue pair only.
234 if (index % VIRTIO_QNUM != 0)
238 vq = old_vq = dev->virtqueue[index];
240 ret = get_mempolicy(&newnode, NULL, 0, old_vq->desc,
241 MPOL_F_NODE | MPOL_F_ADDR);
243 /* check if we need to reallocate vq */
244 ret |= get_mempolicy(&oldnode, NULL, 0, old_vq,
245 MPOL_F_NODE | MPOL_F_ADDR);
247 RTE_LOG(ERR, VHOST_CONFIG,
248 "Unable to get vq numa information.\n");
251 if (oldnode != newnode) {
252 RTE_LOG(INFO, VHOST_CONFIG,
253 "reallocate vq from %d to %d node\n", oldnode, newnode);
254 vq = rte_malloc_socket(NULL, sizeof(*vq) * VIRTIO_QNUM, 0,
259 memcpy(vq, old_vq, sizeof(*vq) * VIRTIO_QNUM);
263 /* check if we need to reallocate dev */
264 ret = get_mempolicy(&oldnode, NULL, 0, old_dev,
265 MPOL_F_NODE | MPOL_F_ADDR);
267 RTE_LOG(ERR, VHOST_CONFIG,
268 "Unable to get dev numa information.\n");
271 if (oldnode != newnode) {
272 RTE_LOG(INFO, VHOST_CONFIG,
273 "reallocate dev from %d to %d node\n",
275 dev = rte_malloc_socket(NULL, sizeof(*dev), 0, newnode);
281 memcpy(dev, old_dev, sizeof(*dev));
286 dev->virtqueue[index] = vq;
287 dev->virtqueue[index + 1] = vq + 1;
288 vhost_devices[dev->vid] = dev;
293 static struct virtio_net*
294 numa_realloc(struct virtio_net *dev, int index __rte_unused)
301 * Converts QEMU virtual address to Vhost virtual address. This function is
302 * used to convert the ring addresses to our address space.
305 qva_to_vva(struct virtio_net *dev, uint64_t qva)
307 struct virtio_memory_region *reg;
310 /* Find the region where the address lives. */
311 for (i = 0; i < dev->mem->nregions; i++) {
312 reg = &dev->mem->regions[i];
314 if (qva >= reg->guest_user_addr &&
315 qva < reg->guest_user_addr + reg->size) {
316 return qva - reg->guest_user_addr +
325 * The virtio device sends us the desc, used and avail ring addresses.
326 * This function then converts these to our address space.
329 vhost_user_set_vring_addr(struct virtio_net *dev, struct vhost_vring_addr *addr)
331 struct vhost_virtqueue *vq;
333 if (dev->mem == NULL)
336 /* addr->index refers to the queue index. The txq 1, rxq is 0. */
337 vq = dev->virtqueue[addr->index];
339 /* The addresses are converted from QEMU virtual to Vhost virtual. */
340 vq->desc = (struct vring_desc *)(uintptr_t)qva_to_vva(dev,
341 addr->desc_user_addr);
343 RTE_LOG(ERR, VHOST_CONFIG,
344 "(%d) failed to find desc ring address.\n",
349 dev = numa_realloc(dev, addr->index);
350 vq = dev->virtqueue[addr->index];
352 vq->avail = (struct vring_avail *)(uintptr_t)qva_to_vva(dev,
353 addr->avail_user_addr);
354 if (vq->avail == 0) {
355 RTE_LOG(ERR, VHOST_CONFIG,
356 "(%d) failed to find avail ring address.\n",
361 vq->used = (struct vring_used *)(uintptr_t)qva_to_vva(dev,
362 addr->used_user_addr);
364 RTE_LOG(ERR, VHOST_CONFIG,
365 "(%d) failed to find used ring address.\n",
370 if (vq->last_used_idx != vq->used->idx) {
371 RTE_LOG(WARNING, VHOST_CONFIG,
372 "last_used_idx (%u) and vq->used->idx (%u) mismatches; "
373 "some packets maybe resent for Tx and dropped for Rx\n",
374 vq->last_used_idx, vq->used->idx);
375 vq->last_used_idx = vq->used->idx;
376 vq->last_avail_idx = vq->used->idx;
379 vq->log_guest_addr = addr->log_guest_addr;
381 LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address desc: %p\n",
383 LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address avail: %p\n",
384 dev->vid, vq->avail);
385 LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address used: %p\n",
387 LOG_DEBUG(VHOST_CONFIG, "(%d) log_guest_addr: %" PRIx64 "\n",
388 dev->vid, vq->log_guest_addr);
394 * The virtio device sends us the available ring last used index.
397 vhost_user_set_vring_base(struct virtio_net *dev,
398 struct vhost_vring_state *state)
400 dev->virtqueue[state->index]->last_used_idx = state->num;
401 dev->virtqueue[state->index]->last_avail_idx = state->num;
407 add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
408 uint64_t host_phys_addr, uint64_t size)
410 struct guest_page *page, *last_page;
412 if (dev->nr_guest_pages == dev->max_guest_pages) {
413 dev->max_guest_pages *= 2;
414 dev->guest_pages = realloc(dev->guest_pages,
415 dev->max_guest_pages * sizeof(*page));
418 if (dev->nr_guest_pages > 0) {
419 last_page = &dev->guest_pages[dev->nr_guest_pages - 1];
420 /* merge if the two pages are continuous */
421 if (host_phys_addr == last_page->host_phys_addr +
423 last_page->size += size;
428 page = &dev->guest_pages[dev->nr_guest_pages++];
429 page->guest_phys_addr = guest_phys_addr;
430 page->host_phys_addr = host_phys_addr;
435 add_guest_pages(struct virtio_net *dev, struct virtio_memory_region *reg,
438 uint64_t reg_size = reg->size;
439 uint64_t host_user_addr = reg->host_user_addr;
440 uint64_t guest_phys_addr = reg->guest_phys_addr;
441 uint64_t host_phys_addr;
444 host_phys_addr = rte_mem_virt2phy((void *)(uintptr_t)host_user_addr);
445 size = page_size - (guest_phys_addr & (page_size - 1));
446 size = RTE_MIN(size, reg_size);
448 add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size);
449 host_user_addr += size;
450 guest_phys_addr += size;
453 while (reg_size > 0) {
454 size = RTE_MIN(reg_size, page_size);
455 host_phys_addr = rte_mem_virt2phy((void *)(uintptr_t)
457 add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size);
459 host_user_addr += size;
460 guest_phys_addr += size;
465 #ifdef RTE_LIBRTE_VHOST_DEBUG
466 /* TODO: enable it only in debug mode? */
468 dump_guest_pages(struct virtio_net *dev)
471 struct guest_page *page;
473 for (i = 0; i < dev->nr_guest_pages; i++) {
474 page = &dev->guest_pages[i];
476 RTE_LOG(INFO, VHOST_CONFIG,
477 "guest physical page region %u\n"
478 "\t guest_phys_addr: %" PRIx64 "\n"
479 "\t host_phys_addr : %" PRIx64 "\n"
480 "\t size : %" PRIx64 "\n",
482 page->guest_phys_addr,
483 page->host_phys_addr,
488 #define dump_guest_pages(dev)
492 vhost_user_set_mem_table(struct virtio_net *dev, struct VhostUserMsg *pmsg)
494 struct VhostUserMemory memory = pmsg->payload.memory;
495 struct virtio_memory_region *reg;
498 uint64_t mmap_offset;
503 /* Remove from the data plane. */
504 if (dev->flags & VIRTIO_DEV_RUNNING) {
505 dev->flags &= ~VIRTIO_DEV_RUNNING;
506 notify_ops->destroy_device(dev->vid);
510 free_mem_region(dev);
515 dev->nr_guest_pages = 0;
516 if (!dev->guest_pages) {
517 dev->max_guest_pages = 8;
518 dev->guest_pages = malloc(dev->max_guest_pages *
519 sizeof(struct guest_page));
522 dev->mem = rte_zmalloc("vhost-mem-table", sizeof(struct virtio_memory) +
523 sizeof(struct virtio_memory_region) * memory.nregions, 0);
524 if (dev->mem == NULL) {
525 RTE_LOG(ERR, VHOST_CONFIG,
526 "(%d) failed to allocate memory for dev->mem\n",
530 dev->mem->nregions = memory.nregions;
532 for (i = 0; i < memory.nregions; i++) {
534 reg = &dev->mem->regions[i];
536 reg->guest_phys_addr = memory.regions[i].guest_phys_addr;
537 reg->guest_user_addr = memory.regions[i].userspace_addr;
538 reg->size = memory.regions[i].memory_size;
541 mmap_offset = memory.regions[i].mmap_offset;
542 mmap_size = reg->size + mmap_offset;
544 /* mmap() without flag of MAP_ANONYMOUS, should be called
545 * with length argument aligned with hugepagesz at older
546 * longterm version Linux, like 2.6.32 and 3.2.72, or
547 * mmap() will fail with EINVAL.
549 * to avoid failure, make sure in caller to keep length
552 alignment = get_blk_size(fd);
553 if (alignment == (uint64_t)-1) {
554 RTE_LOG(ERR, VHOST_CONFIG,
555 "couldn't get hugepage size through fstat\n");
558 mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment);
560 mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
561 MAP_SHARED | MAP_POPULATE, fd, 0);
563 if (mmap_addr == MAP_FAILED) {
564 RTE_LOG(ERR, VHOST_CONFIG,
565 "mmap region %u failed.\n", i);
569 reg->mmap_addr = mmap_addr;
570 reg->mmap_size = mmap_size;
571 reg->host_user_addr = (uint64_t)(uintptr_t)mmap_addr +
574 if (dev->dequeue_zero_copy)
575 add_guest_pages(dev, reg, alignment);
577 RTE_LOG(INFO, VHOST_CONFIG,
578 "guest memory region %u, size: 0x%" PRIx64 "\n"
579 "\t guest physical addr: 0x%" PRIx64 "\n"
580 "\t guest virtual addr: 0x%" PRIx64 "\n"
581 "\t host virtual addr: 0x%" PRIx64 "\n"
582 "\t mmap addr : 0x%" PRIx64 "\n"
583 "\t mmap size : 0x%" PRIx64 "\n"
584 "\t mmap align: 0x%" PRIx64 "\n"
585 "\t mmap off : 0x%" PRIx64 "\n",
587 reg->guest_phys_addr,
588 reg->guest_user_addr,
590 (uint64_t)(uintptr_t)mmap_addr,
596 dump_guest_pages(dev);
601 free_mem_region(dev);
608 vq_is_ready(struct vhost_virtqueue *vq)
610 return vq && vq->desc &&
611 vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD &&
612 vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD;
616 virtio_is_ready(struct virtio_net *dev)
618 struct vhost_virtqueue *rvq, *tvq;
621 for (i = 0; i < dev->virt_qp_nb; i++) {
622 rvq = dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_RXQ];
623 tvq = dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_TXQ];
625 if (!vq_is_ready(rvq) || !vq_is_ready(tvq)) {
626 RTE_LOG(INFO, VHOST_CONFIG,
627 "virtio is not ready for processing.\n");
632 RTE_LOG(INFO, VHOST_CONFIG,
633 "virtio is now ready for processing.\n");
638 vhost_user_set_vring_call(struct virtio_net *dev, struct VhostUserMsg *pmsg)
640 struct vhost_vring_file file;
641 struct vhost_virtqueue *vq;
644 file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
645 if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
646 file.fd = VIRTIO_INVALID_EVENTFD;
648 file.fd = pmsg->fds[0];
649 RTE_LOG(INFO, VHOST_CONFIG,
650 "vring call idx:%d file:%d\n", file.index, file.fd);
653 * FIXME: VHOST_SET_VRING_CALL is the first per-vring message
654 * we get, so we do vring queue pair allocation here.
656 cur_qp_idx = file.index / VIRTIO_QNUM;
657 if (cur_qp_idx + 1 > dev->virt_qp_nb) {
658 if (alloc_vring_queue_pair(dev, cur_qp_idx) < 0)
662 vq = dev->virtqueue[file.index];
668 vq->callfd = file.fd;
672 * In vhost-user, when we receive kick message, will test whether virtio
673 * device is ready for packet processing.
676 vhost_user_set_vring_kick(struct virtio_net *dev, struct VhostUserMsg *pmsg)
678 struct vhost_vring_file file;
679 struct vhost_virtqueue *vq;
681 file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
682 if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
683 file.fd = VIRTIO_INVALID_EVENTFD;
685 file.fd = pmsg->fds[0];
686 RTE_LOG(INFO, VHOST_CONFIG,
687 "vring kick idx:%d file:%d\n", file.index, file.fd);
689 vq = dev->virtqueue[file.index];
692 vq->kickfd = file.fd;
694 if (virtio_is_ready(dev) && !(dev->flags & VIRTIO_DEV_RUNNING)) {
695 if (dev->dequeue_zero_copy) {
696 RTE_LOG(INFO, VHOST_CONFIG,
697 "dequeue zero copy is enabled\n");
700 if (notify_ops->new_device(dev->vid) == 0)
701 dev->flags |= VIRTIO_DEV_RUNNING;
706 free_zmbufs(struct vhost_virtqueue *vq)
708 struct zcopy_mbuf *zmbuf, *next;
710 for (zmbuf = TAILQ_FIRST(&vq->zmbuf_list);
711 zmbuf != NULL; zmbuf = next) {
712 next = TAILQ_NEXT(zmbuf, next);
714 rte_pktmbuf_free(zmbuf->mbuf);
715 TAILQ_REMOVE(&vq->zmbuf_list, zmbuf, next);
718 rte_free(vq->zmbufs);
722 * when virtio is stopped, qemu will send us the GET_VRING_BASE message.
725 vhost_user_get_vring_base(struct virtio_net *dev,
726 struct vhost_vring_state *state)
728 struct vhost_virtqueue *vq = dev->virtqueue[state->index];
730 /* We have to stop the queue (virtio) if it is running. */
731 if (dev->flags & VIRTIO_DEV_RUNNING) {
732 dev->flags &= ~VIRTIO_DEV_RUNNING;
733 notify_ops->destroy_device(dev->vid);
736 /* Here we are safe to get the last used index */
737 state->num = vq->last_used_idx;
739 RTE_LOG(INFO, VHOST_CONFIG,
740 "vring base idx:%d file:%d\n", state->index, state->num);
742 * Based on current qemu vhost-user implementation, this message is
743 * sent and only sent in vhost_vring_stop.
744 * TODO: cleanup the vring, it isn't usable since here.
749 vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
751 if (dev->dequeue_zero_copy)
753 rte_free(vq->shadow_used_ring);
754 vq->shadow_used_ring = NULL;
760 * when virtio queues are ready to work, qemu will send us to
761 * enable the virtio queue pair.
764 vhost_user_set_vring_enable(struct virtio_net *dev,
765 struct vhost_vring_state *state)
767 int enable = (int)state->num;
769 RTE_LOG(INFO, VHOST_CONFIG,
770 "set queue enable: %d to qp idx: %d\n",
771 enable, state->index);
773 if (notify_ops->vring_state_changed)
774 notify_ops->vring_state_changed(dev->vid, state->index, enable);
776 dev->virtqueue[state->index]->enabled = enable;
782 vhost_user_set_protocol_features(struct virtio_net *dev,
783 uint64_t protocol_features)
785 if (protocol_features & ~VHOST_USER_PROTOCOL_FEATURES)
788 dev->protocol_features = protocol_features;
792 vhost_user_set_log_base(struct virtio_net *dev, struct VhostUserMsg *msg)
794 int fd = msg->fds[0];
799 RTE_LOG(ERR, VHOST_CONFIG, "invalid log fd: %d\n", fd);
803 if (msg->size != sizeof(VhostUserLog)) {
804 RTE_LOG(ERR, VHOST_CONFIG,
805 "invalid log base msg size: %"PRId32" != %d\n",
806 msg->size, (int)sizeof(VhostUserLog));
810 size = msg->payload.log.mmap_size;
811 off = msg->payload.log.mmap_offset;
812 RTE_LOG(INFO, VHOST_CONFIG,
813 "log mmap size: %"PRId64", offset: %"PRId64"\n",
817 * mmap from 0 to workaround a hugepage mmap bug: mmap will
818 * fail when offset is not page size aligned.
820 addr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
822 if (addr == MAP_FAILED) {
823 RTE_LOG(ERR, VHOST_CONFIG, "mmap log base failed!\n");
828 * Free previously mapped log memory on occasionally
829 * multiple VHOST_USER_SET_LOG_BASE.
832 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
834 dev->log_addr = (uint64_t)(uintptr_t)addr;
835 dev->log_base = dev->log_addr + off;
836 dev->log_size = size;
842 * An rarp packet is constructed and broadcasted to notify switches about
843 * the new location of the migrated VM, so that packets from outside will
844 * not be lost after migration.
846 * However, we don't actually "send" a rarp packet here, instead, we set
847 * a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it.
850 vhost_user_send_rarp(struct virtio_net *dev, struct VhostUserMsg *msg)
852 uint8_t *mac = (uint8_t *)&msg->payload.u64;
854 RTE_LOG(DEBUG, VHOST_CONFIG,
855 ":: mac: %02x:%02x:%02x:%02x:%02x:%02x\n",
856 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
857 memcpy(dev->mac.addr_bytes, mac, 6);
860 * Set the flag to inject a RARP broadcast packet at
861 * rte_vhost_dequeue_burst().
863 * rte_smp_wmb() is for making sure the mac is copied
864 * before the flag is set.
867 rte_atomic16_set(&dev->broadcast_rarp, 1);
872 /* return bytes# of read on success or negative val on failure. */
874 read_vhost_message(int sockfd, struct VhostUserMsg *msg)
878 ret = read_fd_message(sockfd, (char *)msg, VHOST_USER_HDR_SIZE,
879 msg->fds, VHOST_MEMORY_MAX_NREGIONS);
883 if (msg && msg->size) {
884 if (msg->size > sizeof(msg->payload)) {
885 RTE_LOG(ERR, VHOST_CONFIG,
886 "invalid msg size: %d\n", msg->size);
889 ret = read(sockfd, &msg->payload, msg->size);
892 if (ret != (int)msg->size) {
893 RTE_LOG(ERR, VHOST_CONFIG,
894 "read control message failed\n");
903 send_vhost_message(int sockfd, struct VhostUserMsg *msg)
910 msg->flags &= ~VHOST_USER_VERSION_MASK;
911 msg->flags |= VHOST_USER_VERSION;
912 msg->flags |= VHOST_USER_REPLY_MASK;
914 ret = send_fd_message(sockfd, (char *)msg,
915 VHOST_USER_HDR_SIZE + msg->size, NULL, 0);
921 vhost_user_msg_handler(int vid, int fd)
923 struct virtio_net *dev;
924 struct VhostUserMsg msg;
927 dev = get_device(vid);
931 ret = read_vhost_message(fd, &msg);
932 if (ret <= 0 || msg.request >= VHOST_USER_MAX) {
934 RTE_LOG(ERR, VHOST_CONFIG,
935 "vhost read message failed\n");
937 RTE_LOG(INFO, VHOST_CONFIG,
938 "vhost peer closed\n");
940 RTE_LOG(ERR, VHOST_CONFIG,
941 "vhost read incorrect message\n");
946 RTE_LOG(INFO, VHOST_CONFIG, "read message %s\n",
947 vhost_message_str[msg.request]);
948 switch (msg.request) {
949 case VHOST_USER_GET_FEATURES:
950 msg.payload.u64 = vhost_user_get_features();
951 msg.size = sizeof(msg.payload.u64);
952 send_vhost_message(fd, &msg);
954 case VHOST_USER_SET_FEATURES:
955 vhost_user_set_features(dev, msg.payload.u64);
958 case VHOST_USER_GET_PROTOCOL_FEATURES:
959 msg.payload.u64 = VHOST_USER_PROTOCOL_FEATURES;
960 msg.size = sizeof(msg.payload.u64);
961 send_vhost_message(fd, &msg);
963 case VHOST_USER_SET_PROTOCOL_FEATURES:
964 vhost_user_set_protocol_features(dev, msg.payload.u64);
967 case VHOST_USER_SET_OWNER:
968 vhost_user_set_owner();
970 case VHOST_USER_RESET_OWNER:
971 vhost_user_reset_owner(dev);
974 case VHOST_USER_SET_MEM_TABLE:
975 vhost_user_set_mem_table(dev, &msg);
978 case VHOST_USER_SET_LOG_BASE:
979 vhost_user_set_log_base(dev, &msg);
981 /* it needs a reply */
982 msg.size = sizeof(msg.payload.u64);
983 send_vhost_message(fd, &msg);
985 case VHOST_USER_SET_LOG_FD:
987 RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
990 case VHOST_USER_SET_VRING_NUM:
991 vhost_user_set_vring_num(dev, &msg.payload.state);
993 case VHOST_USER_SET_VRING_ADDR:
994 vhost_user_set_vring_addr(dev, &msg.payload.addr);
996 case VHOST_USER_SET_VRING_BASE:
997 vhost_user_set_vring_base(dev, &msg.payload.state);
1000 case VHOST_USER_GET_VRING_BASE:
1001 ret = vhost_user_get_vring_base(dev, &msg.payload.state);
1002 msg.size = sizeof(msg.payload.state);
1003 send_vhost_message(fd, &msg);
1006 case VHOST_USER_SET_VRING_KICK:
1007 vhost_user_set_vring_kick(dev, &msg);
1009 case VHOST_USER_SET_VRING_CALL:
1010 vhost_user_set_vring_call(dev, &msg);
1013 case VHOST_USER_SET_VRING_ERR:
1014 if (!(msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK))
1016 RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
1019 case VHOST_USER_GET_QUEUE_NUM:
1020 msg.payload.u64 = VHOST_MAX_QUEUE_PAIRS;
1021 msg.size = sizeof(msg.payload.u64);
1022 send_vhost_message(fd, &msg);
1025 case VHOST_USER_SET_VRING_ENABLE:
1026 vhost_user_set_vring_enable(dev, &msg.payload.state);
1028 case VHOST_USER_SEND_RARP:
1029 vhost_user_send_rarp(dev, &msg);