1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2016 Intel Corporation
11 #include <sys/types.h>
12 #include <sys/socket.h>
14 #include <sys/queue.h>
23 #include "vhost_user.h"
26 TAILQ_HEAD(vhost_user_connection_list, vhost_user_connection);
29 * Every time rte_vhost_driver_register() is invoked, an associated
30 * vhost_user_socket struct will be created.
32 struct vhost_user_socket {
33 struct vhost_user_connection_list conn_list;
34 pthread_mutex_t conn_mutex;
37 struct sockaddr_un un;
40 bool dequeue_zero_copy;
42 bool use_builtin_virtio_net;
45 * The "supported_features" indicates the feature bits the
46 * vhost driver supports. The "features" indicates the feature
47 * bits after the rte_vhost_driver_features_disable/enable().
48 * It is also the final feature bits used for vhost-user
49 * features negotiation.
51 uint64_t supported_features;
54 uint64_t protocol_features;
57 * Device id to identify a specific backend device.
58 * It's set to -1 for the default software implementation.
59 * If valid, one socket can have 1 connection only.
63 struct vhost_device_ops const *notify_ops;
66 struct vhost_user_connection {
67 struct vhost_user_socket *vsocket;
71 TAILQ_ENTRY(vhost_user_connection) next;
74 #define MAX_VHOST_SOCKET 1024
76 struct vhost_user_socket *vsockets[MAX_VHOST_SOCKET];
79 pthread_mutex_t mutex;
82 #define MAX_VIRTIO_BACKLOG 128
84 static void vhost_user_server_new_connection(int fd, void *data, int *remove);
85 static void vhost_user_read_cb(int fd, void *dat, int *remove);
86 static int create_unix_socket(struct vhost_user_socket *vsocket);
87 static int vhost_user_start_client(struct vhost_user_socket *vsocket);
89 static struct vhost_user vhost_user = {
91 .fd = { [0 ... MAX_FDS - 1] = {-1, NULL, NULL, NULL, 0} },
92 .fd_mutex = PTHREAD_MUTEX_INITIALIZER,
93 .fd_pooling_mutex = PTHREAD_MUTEX_INITIALIZER,
97 .mutex = PTHREAD_MUTEX_INITIALIZER,
101 * return bytes# of read on success or negative val on failure. Update fdnum
102 * with number of fds read.
105 read_fd_message(int sockfd, char *buf, int buflen, int *fds, int max_fds,
110 char control[CMSG_SPACE(max_fds * sizeof(int))];
111 struct cmsghdr *cmsg;
117 memset(&msgh, 0, sizeof(msgh));
119 iov.iov_len = buflen;
123 msgh.msg_control = control;
124 msgh.msg_controllen = sizeof(control);
126 ret = recvmsg(sockfd, &msgh, 0);
128 RTE_LOG(ERR, VHOST_CONFIG, "recvmsg failed\n");
132 if (msgh.msg_flags & (MSG_TRUNC | MSG_CTRUNC)) {
133 RTE_LOG(ERR, VHOST_CONFIG, "truncted msg\n");
137 for (cmsg = CMSG_FIRSTHDR(&msgh); cmsg != NULL;
138 cmsg = CMSG_NXTHDR(&msgh, cmsg)) {
139 if ((cmsg->cmsg_level == SOL_SOCKET) &&
140 (cmsg->cmsg_type == SCM_RIGHTS)) {
141 got_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
143 memcpy(fds, CMSG_DATA(cmsg), got_fds * sizeof(int));
148 /* Clear out unused file descriptors */
149 while (got_fds < max_fds)
156 send_fd_message(int sockfd, char *buf, int buflen, int *fds, int fd_num)
161 size_t fdsize = fd_num * sizeof(int);
162 char control[CMSG_SPACE(fdsize)];
163 struct cmsghdr *cmsg;
166 memset(&msgh, 0, sizeof(msgh));
168 iov.iov_len = buflen;
173 if (fds && fd_num > 0) {
174 msgh.msg_control = control;
175 msgh.msg_controllen = sizeof(control);
176 cmsg = CMSG_FIRSTHDR(&msgh);
178 RTE_LOG(ERR, VHOST_CONFIG, "cmsg == NULL\n");
182 cmsg->cmsg_len = CMSG_LEN(fdsize);
183 cmsg->cmsg_level = SOL_SOCKET;
184 cmsg->cmsg_type = SCM_RIGHTS;
185 memcpy(CMSG_DATA(cmsg), fds, fdsize);
187 msgh.msg_control = NULL;
188 msgh.msg_controllen = 0;
192 ret = sendmsg(sockfd, &msgh, MSG_NOSIGNAL);
193 } while (ret < 0 && errno == EINTR);
196 RTE_LOG(ERR, VHOST_CONFIG, "sendmsg error\n");
204 vhost_user_add_connection(int fd, struct vhost_user_socket *vsocket)
208 struct vhost_user_connection *conn;
214 conn = malloc(sizeof(*conn));
220 vid = vhost_new_device();
225 size = strnlen(vsocket->path, PATH_MAX);
226 vhost_set_ifname(vid, vsocket->path, size);
228 vhost_set_builtin_virtio_net(vid, vsocket->use_builtin_virtio_net);
230 vhost_attach_vdpa_device(vid, vsocket->vdpa_dev_id);
232 if (vsocket->dequeue_zero_copy)
233 vhost_enable_dequeue_zero_copy(vid);
235 RTE_LOG(INFO, VHOST_CONFIG, "new device, handle is %d\n", vid);
237 if (vsocket->notify_ops->new_connection) {
238 ret = vsocket->notify_ops->new_connection(vid);
240 RTE_LOG(ERR, VHOST_CONFIG,
241 "failed to add vhost user connection with fd %d\n",
248 conn->vsocket = vsocket;
250 ret = fdset_add(&vhost_user.fdset, fd, vhost_user_read_cb,
253 RTE_LOG(ERR, VHOST_CONFIG,
254 "failed to add fd %d into vhost server fdset\n",
257 if (vsocket->notify_ops->destroy_connection)
258 vsocket->notify_ops->destroy_connection(conn->vid);
263 pthread_mutex_lock(&vsocket->conn_mutex);
264 TAILQ_INSERT_TAIL(&vsocket->conn_list, conn, next);
265 pthread_mutex_unlock(&vsocket->conn_mutex);
267 fdset_pipe_notify(&vhost_user.fdset);
275 /* call back when there is new vhost-user connection from client */
277 vhost_user_server_new_connection(int fd, void *dat, int *remove __rte_unused)
279 struct vhost_user_socket *vsocket = dat;
281 fd = accept(fd, NULL, NULL);
285 RTE_LOG(INFO, VHOST_CONFIG, "new vhost user connection is %d\n", fd);
286 vhost_user_add_connection(fd, vsocket);
290 vhost_user_read_cb(int connfd, void *dat, int *remove)
292 struct vhost_user_connection *conn = dat;
293 struct vhost_user_socket *vsocket = conn->vsocket;
296 ret = vhost_user_msg_handler(conn->vid, connfd);
300 vhost_destroy_device(conn->vid);
302 if (vsocket->notify_ops->destroy_connection)
303 vsocket->notify_ops->destroy_connection(conn->vid);
305 pthread_mutex_lock(&vsocket->conn_mutex);
306 TAILQ_REMOVE(&vsocket->conn_list, conn, next);
307 pthread_mutex_unlock(&vsocket->conn_mutex);
311 if (vsocket->reconnect) {
312 create_unix_socket(vsocket);
313 vhost_user_start_client(vsocket);
319 create_unix_socket(struct vhost_user_socket *vsocket)
322 struct sockaddr_un *un = &vsocket->un;
324 fd = socket(AF_UNIX, SOCK_STREAM, 0);
327 RTE_LOG(INFO, VHOST_CONFIG, "vhost-user %s: socket created, fd: %d\n",
328 vsocket->is_server ? "server" : "client", fd);
330 if (!vsocket->is_server && fcntl(fd, F_SETFL, O_NONBLOCK)) {
331 RTE_LOG(ERR, VHOST_CONFIG,
332 "vhost-user: can't set nonblocking mode for socket, fd: "
333 "%d (%s)\n", fd, strerror(errno));
338 memset(un, 0, sizeof(*un));
339 un->sun_family = AF_UNIX;
340 strncpy(un->sun_path, vsocket->path, sizeof(un->sun_path));
341 un->sun_path[sizeof(un->sun_path) - 1] = '\0';
343 vsocket->socket_fd = fd;
348 vhost_user_start_server(struct vhost_user_socket *vsocket)
351 int fd = vsocket->socket_fd;
352 const char *path = vsocket->path;
355 * bind () may fail if the socket file with the same name already
356 * exists. But the library obviously should not delete the file
357 * provided by the user, since we can not be sure that it is not
358 * being used by other applications. Moreover, many applications form
359 * socket names based on user input, which is prone to errors.
361 * The user must ensure that the socket does not exist before
362 * registering the vhost driver in server mode.
364 ret = bind(fd, (struct sockaddr *)&vsocket->un, sizeof(vsocket->un));
366 RTE_LOG(ERR, VHOST_CONFIG,
367 "failed to bind to %s: %s; remove it and try again\n",
368 path, strerror(errno));
371 RTE_LOG(INFO, VHOST_CONFIG, "bind to %s\n", path);
373 ret = listen(fd, MAX_VIRTIO_BACKLOG);
377 ret = fdset_add(&vhost_user.fdset, fd, vhost_user_server_new_connection,
380 RTE_LOG(ERR, VHOST_CONFIG,
381 "failed to add listen fd %d to vhost server fdset\n",
393 struct vhost_user_reconnect {
394 struct sockaddr_un un;
396 struct vhost_user_socket *vsocket;
398 TAILQ_ENTRY(vhost_user_reconnect) next;
401 TAILQ_HEAD(vhost_user_reconnect_tailq_list, vhost_user_reconnect);
402 struct vhost_user_reconnect_list {
403 struct vhost_user_reconnect_tailq_list head;
404 pthread_mutex_t mutex;
407 static struct vhost_user_reconnect_list reconn_list;
408 static pthread_t reconn_tid;
411 vhost_user_connect_nonblock(int fd, struct sockaddr *un, size_t sz)
415 ret = connect(fd, un, sz);
416 if (ret < 0 && errno != EISCONN)
419 flags = fcntl(fd, F_GETFL, 0);
421 RTE_LOG(ERR, VHOST_CONFIG,
422 "can't get flags for connfd %d\n", fd);
425 if ((flags & O_NONBLOCK) && fcntl(fd, F_SETFL, flags & ~O_NONBLOCK)) {
426 RTE_LOG(ERR, VHOST_CONFIG,
427 "can't disable nonblocking on fd %d\n", fd);
434 vhost_user_client_reconnect(void *arg __rte_unused)
437 struct vhost_user_reconnect *reconn, *next;
440 pthread_mutex_lock(&reconn_list.mutex);
443 * An equal implementation of TAILQ_FOREACH_SAFE,
444 * which does not exist on all platforms.
446 for (reconn = TAILQ_FIRST(&reconn_list.head);
447 reconn != NULL; reconn = next) {
448 next = TAILQ_NEXT(reconn, next);
450 ret = vhost_user_connect_nonblock(reconn->fd,
451 (struct sockaddr *)&reconn->un,
455 RTE_LOG(ERR, VHOST_CONFIG,
456 "reconnection for fd %d failed\n",
463 RTE_LOG(INFO, VHOST_CONFIG,
464 "%s: connected\n", reconn->vsocket->path);
465 vhost_user_add_connection(reconn->fd, reconn->vsocket);
467 TAILQ_REMOVE(&reconn_list.head, reconn, next);
471 pthread_mutex_unlock(&reconn_list.mutex);
479 vhost_user_reconnect_init(void)
483 ret = pthread_mutex_init(&reconn_list.mutex, NULL);
485 RTE_LOG(ERR, VHOST_CONFIG, "failed to initialize mutex");
488 TAILQ_INIT(&reconn_list.head);
490 ret = rte_ctrl_thread_create(&reconn_tid, "vhost_reconn", NULL,
491 vhost_user_client_reconnect, NULL);
493 RTE_LOG(ERR, VHOST_CONFIG, "failed to create reconnect thread");
494 if (pthread_mutex_destroy(&reconn_list.mutex)) {
495 RTE_LOG(ERR, VHOST_CONFIG,
496 "failed to destroy reconnect mutex");
504 vhost_user_start_client(struct vhost_user_socket *vsocket)
507 int fd = vsocket->socket_fd;
508 const char *path = vsocket->path;
509 struct vhost_user_reconnect *reconn;
511 ret = vhost_user_connect_nonblock(fd, (struct sockaddr *)&vsocket->un,
512 sizeof(vsocket->un));
514 vhost_user_add_connection(fd, vsocket);
518 RTE_LOG(WARNING, VHOST_CONFIG,
519 "failed to connect to %s: %s\n",
520 path, strerror(errno));
522 if (ret == -2 || !vsocket->reconnect) {
527 RTE_LOG(INFO, VHOST_CONFIG, "%s: reconnecting...\n", path);
528 reconn = malloc(sizeof(*reconn));
529 if (reconn == NULL) {
530 RTE_LOG(ERR, VHOST_CONFIG,
531 "failed to allocate memory for reconnect\n");
535 reconn->un = vsocket->un;
537 reconn->vsocket = vsocket;
538 pthread_mutex_lock(&reconn_list.mutex);
539 TAILQ_INSERT_TAIL(&reconn_list.head, reconn, next);
540 pthread_mutex_unlock(&reconn_list.mutex);
545 static struct vhost_user_socket *
546 find_vhost_user_socket(const char *path)
550 for (i = 0; i < vhost_user.vsocket_cnt; i++) {
551 struct vhost_user_socket *vsocket = vhost_user.vsockets[i];
553 if (!strcmp(vsocket->path, path))
561 rte_vhost_driver_attach_vdpa_device(const char *path, int did)
563 struct vhost_user_socket *vsocket;
565 if (rte_vdpa_get_device(did) == NULL)
568 pthread_mutex_lock(&vhost_user.mutex);
569 vsocket = find_vhost_user_socket(path);
571 vsocket->vdpa_dev_id = did;
572 pthread_mutex_unlock(&vhost_user.mutex);
574 return vsocket ? 0 : -1;
578 rte_vhost_driver_detach_vdpa_device(const char *path)
580 struct vhost_user_socket *vsocket;
582 pthread_mutex_lock(&vhost_user.mutex);
583 vsocket = find_vhost_user_socket(path);
585 vsocket->vdpa_dev_id = -1;
586 pthread_mutex_unlock(&vhost_user.mutex);
588 return vsocket ? 0 : -1;
592 rte_vhost_driver_get_vdpa_device_id(const char *path)
594 struct vhost_user_socket *vsocket;
597 pthread_mutex_lock(&vhost_user.mutex);
598 vsocket = find_vhost_user_socket(path);
600 did = vsocket->vdpa_dev_id;
601 pthread_mutex_unlock(&vhost_user.mutex);
607 rte_vhost_driver_disable_features(const char *path, uint64_t features)
609 struct vhost_user_socket *vsocket;
611 pthread_mutex_lock(&vhost_user.mutex);
612 vsocket = find_vhost_user_socket(path);
614 /* Note that use_builtin_virtio_net is not affected by this function
615 * since callers may want to selectively disable features of the
616 * built-in vhost net device backend.
620 vsocket->features &= ~features;
621 pthread_mutex_unlock(&vhost_user.mutex);
623 return vsocket ? 0 : -1;
627 rte_vhost_driver_enable_features(const char *path, uint64_t features)
629 struct vhost_user_socket *vsocket;
631 pthread_mutex_lock(&vhost_user.mutex);
632 vsocket = find_vhost_user_socket(path);
634 if ((vsocket->supported_features & features) != features) {
636 * trying to enable features the driver doesn't
639 pthread_mutex_unlock(&vhost_user.mutex);
642 vsocket->features |= features;
644 pthread_mutex_unlock(&vhost_user.mutex);
646 return vsocket ? 0 : -1;
650 rte_vhost_driver_set_features(const char *path, uint64_t features)
652 struct vhost_user_socket *vsocket;
654 pthread_mutex_lock(&vhost_user.mutex);
655 vsocket = find_vhost_user_socket(path);
657 vsocket->supported_features = features;
658 vsocket->features = features;
660 /* Anyone setting feature bits is implementing their own vhost
663 vsocket->use_builtin_virtio_net = false;
665 pthread_mutex_unlock(&vhost_user.mutex);
667 return vsocket ? 0 : -1;
671 rte_vhost_driver_get_features(const char *path, uint64_t *features)
673 struct vhost_user_socket *vsocket;
674 uint64_t vdpa_features;
675 struct rte_vdpa_device *vdpa_dev;
679 pthread_mutex_lock(&vhost_user.mutex);
680 vsocket = find_vhost_user_socket(path);
682 RTE_LOG(ERR, VHOST_CONFIG,
683 "socket file %s is not registered yet.\n", path);
688 did = vsocket->vdpa_dev_id;
689 vdpa_dev = rte_vdpa_get_device(did);
690 if (!vdpa_dev || !vdpa_dev->ops->get_features) {
691 *features = vsocket->features;
695 if (vdpa_dev->ops->get_features(did, &vdpa_features) < 0) {
696 RTE_LOG(ERR, VHOST_CONFIG,
697 "failed to get vdpa features "
698 "for socket file %s.\n", path);
703 *features = vsocket->features & vdpa_features;
706 pthread_mutex_unlock(&vhost_user.mutex);
711 rte_vhost_driver_set_protocol_features(const char *path,
712 uint64_t protocol_features)
714 struct vhost_user_socket *vsocket;
716 pthread_mutex_lock(&vhost_user.mutex);
717 vsocket = find_vhost_user_socket(path);
719 vsocket->protocol_features = protocol_features;
720 pthread_mutex_unlock(&vhost_user.mutex);
721 return vsocket ? 0 : -1;
725 rte_vhost_driver_get_protocol_features(const char *path,
726 uint64_t *protocol_features)
728 struct vhost_user_socket *vsocket;
729 uint64_t vdpa_protocol_features;
730 struct rte_vdpa_device *vdpa_dev;
734 pthread_mutex_lock(&vhost_user.mutex);
735 vsocket = find_vhost_user_socket(path);
737 RTE_LOG(ERR, VHOST_CONFIG,
738 "socket file %s is not registered yet.\n", path);
743 did = vsocket->vdpa_dev_id;
744 vdpa_dev = rte_vdpa_get_device(did);
745 if (!vdpa_dev || !vdpa_dev->ops->get_protocol_features) {
746 *protocol_features = vsocket->protocol_features;
750 if (vdpa_dev->ops->get_protocol_features(did,
751 &vdpa_protocol_features) < 0) {
752 RTE_LOG(ERR, VHOST_CONFIG,
753 "failed to get vdpa protocol features "
754 "for socket file %s.\n", path);
759 *protocol_features = vsocket->protocol_features
760 & vdpa_protocol_features;
763 pthread_mutex_unlock(&vhost_user.mutex);
768 rte_vhost_driver_get_queue_num(const char *path, uint32_t *queue_num)
770 struct vhost_user_socket *vsocket;
771 uint32_t vdpa_queue_num;
772 struct rte_vdpa_device *vdpa_dev;
776 pthread_mutex_lock(&vhost_user.mutex);
777 vsocket = find_vhost_user_socket(path);
779 RTE_LOG(ERR, VHOST_CONFIG,
780 "socket file %s is not registered yet.\n", path);
785 did = vsocket->vdpa_dev_id;
786 vdpa_dev = rte_vdpa_get_device(did);
787 if (!vdpa_dev || !vdpa_dev->ops->get_queue_num) {
788 *queue_num = VHOST_MAX_QUEUE_PAIRS;
792 if (vdpa_dev->ops->get_queue_num(did, &vdpa_queue_num) < 0) {
793 RTE_LOG(ERR, VHOST_CONFIG,
794 "failed to get vdpa queue number "
795 "for socket file %s.\n", path);
800 *queue_num = RTE_MIN((uint32_t)VHOST_MAX_QUEUE_PAIRS, vdpa_queue_num);
803 pthread_mutex_unlock(&vhost_user.mutex);
808 vhost_user_socket_mem_free(struct vhost_user_socket *vsocket)
810 if (vsocket && vsocket->path) {
812 vsocket->path = NULL;
822 * Register a new vhost-user socket; here we could act as server
823 * (the default case), or client (when RTE_VHOST_USER_CLIENT) flag
827 rte_vhost_driver_register(const char *path, uint64_t flags)
830 struct vhost_user_socket *vsocket;
835 pthread_mutex_lock(&vhost_user.mutex);
837 if (vhost_user.vsocket_cnt == MAX_VHOST_SOCKET) {
838 RTE_LOG(ERR, VHOST_CONFIG,
839 "error: the number of vhost sockets reaches maximum\n");
843 vsocket = malloc(sizeof(struct vhost_user_socket));
846 memset(vsocket, 0, sizeof(struct vhost_user_socket));
847 vsocket->path = strdup(path);
848 if (vsocket->path == NULL) {
849 RTE_LOG(ERR, VHOST_CONFIG,
850 "error: failed to copy socket path string\n");
851 vhost_user_socket_mem_free(vsocket);
854 TAILQ_INIT(&vsocket->conn_list);
855 ret = pthread_mutex_init(&vsocket->conn_mutex, NULL);
857 RTE_LOG(ERR, VHOST_CONFIG,
858 "error: failed to init connection mutex\n");
861 vsocket->dequeue_zero_copy = flags & RTE_VHOST_USER_DEQUEUE_ZERO_COPY;
864 * Set the supported features correctly for the builtin vhost-user
867 * Applications know nothing about features the builtin virtio net
868 * driver (virtio_net.c) supports, thus it's not possible for them
869 * to invoke rte_vhost_driver_set_features(). To workaround it, here
870 * we set it unconditionally. If the application want to implement
871 * another vhost-user driver (say SCSI), it should call the
872 * rte_vhost_driver_set_features(), which will overwrite following
875 vsocket->use_builtin_virtio_net = true;
876 vsocket->supported_features = VIRTIO_NET_SUPPORTED_FEATURES;
877 vsocket->features = VIRTIO_NET_SUPPORTED_FEATURES;
878 vsocket->protocol_features = VHOST_USER_PROTOCOL_FEATURES;
881 * Dequeue zero copy can't assure descriptors returned in order.
882 * Also, it requires that the guest memory is populated, which is
883 * not compatible with postcopy.
885 if (vsocket->dequeue_zero_copy) {
886 vsocket->supported_features &= ~(1ULL << VIRTIO_F_IN_ORDER);
887 vsocket->features &= ~(1ULL << VIRTIO_F_IN_ORDER);
889 RTE_LOG(INFO, VHOST_CONFIG,
890 "Dequeue zero copy requested, disabling postcopy support\n");
891 vsocket->protocol_features &=
892 ~(1ULL << VHOST_USER_PROTOCOL_F_PAGEFAULT);
895 if (!(flags & RTE_VHOST_USER_IOMMU_SUPPORT)) {
896 vsocket->supported_features &= ~(1ULL << VIRTIO_F_IOMMU_PLATFORM);
897 vsocket->features &= ~(1ULL << VIRTIO_F_IOMMU_PLATFORM);
900 if (!(flags & RTE_VHOST_USER_POSTCOPY_SUPPORT)) {
901 vsocket->protocol_features &=
902 ~(1ULL << VHOST_USER_PROTOCOL_F_PAGEFAULT);
904 #ifndef RTE_LIBRTE_VHOST_POSTCOPY
905 RTE_LOG(ERR, VHOST_CONFIG,
906 "Postcopy requested but not compiled\n");
912 if ((flags & RTE_VHOST_USER_CLIENT) != 0) {
913 vsocket->reconnect = !(flags & RTE_VHOST_USER_NO_RECONNECT);
914 if (vsocket->reconnect && reconn_tid == 0) {
915 if (vhost_user_reconnect_init() != 0)
919 vsocket->is_server = true;
921 ret = create_unix_socket(vsocket);
926 vhost_user.vsockets[vhost_user.vsocket_cnt++] = vsocket;
928 pthread_mutex_unlock(&vhost_user.mutex);
932 if (pthread_mutex_destroy(&vsocket->conn_mutex)) {
933 RTE_LOG(ERR, VHOST_CONFIG,
934 "error: failed to destroy connection mutex\n");
937 vhost_user_socket_mem_free(vsocket);
939 pthread_mutex_unlock(&vhost_user.mutex);
945 vhost_user_remove_reconnect(struct vhost_user_socket *vsocket)
948 struct vhost_user_reconnect *reconn, *next;
950 pthread_mutex_lock(&reconn_list.mutex);
952 for (reconn = TAILQ_FIRST(&reconn_list.head);
953 reconn != NULL; reconn = next) {
954 next = TAILQ_NEXT(reconn, next);
956 if (reconn->vsocket == vsocket) {
957 TAILQ_REMOVE(&reconn_list.head, reconn, next);
964 pthread_mutex_unlock(&reconn_list.mutex);
969 * Unregister the specified vhost socket
972 rte_vhost_driver_unregister(const char *path)
976 struct vhost_user_connection *conn, *next;
979 pthread_mutex_lock(&vhost_user.mutex);
981 for (i = 0; i < vhost_user.vsocket_cnt; i++) {
982 struct vhost_user_socket *vsocket = vhost_user.vsockets[i];
984 if (!strcmp(vsocket->path, path)) {
985 pthread_mutex_lock(&vsocket->conn_mutex);
986 for (conn = TAILQ_FIRST(&vsocket->conn_list);
989 next = TAILQ_NEXT(conn, next);
992 * If r/wcb is executing, release the
993 * conn_mutex lock, and try again since
994 * the r/wcb may use the conn_mutex lock.
996 if (fdset_try_del(&vhost_user.fdset,
997 conn->connfd) == -1) {
998 pthread_mutex_unlock(
999 &vsocket->conn_mutex);
1000 pthread_mutex_unlock(&vhost_user.mutex);
1004 RTE_LOG(INFO, VHOST_CONFIG,
1005 "free connfd = %d for device '%s'\n",
1006 conn->connfd, path);
1007 close(conn->connfd);
1008 vhost_destroy_device(conn->vid);
1009 TAILQ_REMOVE(&vsocket->conn_list, conn, next);
1012 pthread_mutex_unlock(&vsocket->conn_mutex);
1014 if (vsocket->is_server) {
1015 fdset_del(&vhost_user.fdset,
1016 vsocket->socket_fd);
1017 close(vsocket->socket_fd);
1019 } else if (vsocket->reconnect) {
1020 vhost_user_remove_reconnect(vsocket);
1023 pthread_mutex_destroy(&vsocket->conn_mutex);
1024 vhost_user_socket_mem_free(vsocket);
1026 count = --vhost_user.vsocket_cnt;
1027 vhost_user.vsockets[i] = vhost_user.vsockets[count];
1028 vhost_user.vsockets[count] = NULL;
1029 pthread_mutex_unlock(&vhost_user.mutex);
1034 pthread_mutex_unlock(&vhost_user.mutex);
1040 * Register ops so that we can add/remove device to data core.
1043 rte_vhost_driver_callback_register(const char *path,
1044 struct vhost_device_ops const * const ops)
1046 struct vhost_user_socket *vsocket;
1048 pthread_mutex_lock(&vhost_user.mutex);
1049 vsocket = find_vhost_user_socket(path);
1051 vsocket->notify_ops = ops;
1052 pthread_mutex_unlock(&vhost_user.mutex);
1054 return vsocket ? 0 : -1;
1057 struct vhost_device_ops const *
1058 vhost_driver_callback_get(const char *path)
1060 struct vhost_user_socket *vsocket;
1062 pthread_mutex_lock(&vhost_user.mutex);
1063 vsocket = find_vhost_user_socket(path);
1064 pthread_mutex_unlock(&vhost_user.mutex);
1066 return vsocket ? vsocket->notify_ops : NULL;
1070 rte_vhost_driver_start(const char *path)
1072 struct vhost_user_socket *vsocket;
1073 static pthread_t fdset_tid;
1075 pthread_mutex_lock(&vhost_user.mutex);
1076 vsocket = find_vhost_user_socket(path);
1077 pthread_mutex_unlock(&vhost_user.mutex);
1082 if (fdset_tid == 0) {
1084 * create a pipe which will be waited by poll and notified to
1085 * rebuild the wait list of poll.
1087 if (fdset_pipe_init(&vhost_user.fdset) < 0) {
1088 RTE_LOG(ERR, VHOST_CONFIG,
1089 "failed to create pipe for vhost fdset\n");
1093 int ret = rte_ctrl_thread_create(&fdset_tid,
1094 "vhost-events", NULL, fdset_event_dispatch,
1097 RTE_LOG(ERR, VHOST_CONFIG,
1098 "failed to create fdset handling thread");
1100 fdset_pipe_uninit(&vhost_user.fdset);
1105 if (vsocket->is_server)
1106 return vhost_user_start_server(vsocket);
1108 return vhost_user_start_client(vsocket);