1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2016-2018 Intel Corporation
18 #include <sys/types.h>
19 #include <sys/socket.h>
23 #include <rte_common.h>
24 #include <rte_cycles.h>
26 #include <rte_errno.h>
27 #include <rte_lcore.h>
29 #include <rte_tailq.h>
31 #include "eal_private.h"
32 #include "eal_filesystem.h"
33 #include "eal_internal_cfg.h"
35 static int mp_fd = -1;
36 static char mp_filter[PATH_MAX]; /* Filter for secondary process sockets */
37 static char mp_dir_path[PATH_MAX]; /* The directory path for all mp sockets */
38 static pthread_mutex_t mp_mutex_action = PTHREAD_MUTEX_INITIALIZER;
41 TAILQ_ENTRY(action_entry) next;
42 char action_name[RTE_MP_MAX_NAME_LEN];
46 /** Double linked list of actions. */
47 TAILQ_HEAD(action_entry_list, action_entry);
49 static struct action_entry_list action_entry_list =
50 TAILQ_HEAD_INITIALIZER(action_entry_list);
53 MP_MSG, /* Share message with peers, will not block */
54 MP_REQ, /* Request for information, Will block for a reply */
55 MP_REP, /* Response to previously-received request */
56 MP_IGN, /* Response telling requester to ignore this response */
59 struct mp_msg_internal {
61 struct rte_mp_msg msg;
64 struct async_request_param {
65 rte_mp_async_reply_t clb;
66 struct rte_mp_reply user_reply;
68 int n_responses_processed;
71 struct pending_request {
72 TAILQ_ENTRY(pending_request) next;
78 struct rte_mp_msg *request;
79 struct rte_mp_msg *reply;
84 struct async_request_param *param;
92 TAILQ_HEAD(pending_request_list, pending_request);
95 struct pending_request_list requests;
97 pthread_cond_t async_cond;
98 } pending_requests = {
99 .requests = TAILQ_HEAD_INITIALIZER(pending_requests.requests),
100 .lock = PTHREAD_MUTEX_INITIALIZER,
101 .async_cond = PTHREAD_COND_INITIALIZER
102 /**< used in async requests only */
105 /* forward declarations */
107 mp_send(struct rte_mp_msg *msg, const char *peer, int type);
110 static struct pending_request *
111 find_sync_request(const char *dst, const char *act_name)
113 struct pending_request *r;
115 TAILQ_FOREACH(r, &pending_requests.requests, next) {
116 if (!strcmp(r->dst, dst) &&
117 !strcmp(r->request->name, act_name))
125 create_socket_path(const char *name, char *buf, int len)
127 const char *prefix = eal_mp_socket_path();
129 if (strlen(name) > 0)
130 snprintf(buf, len, "%s_%s", prefix, name);
132 strlcpy(buf, prefix, len);
136 rte_eal_primary_proc_alive(const char *config_file_path)
140 if (config_file_path)
141 config_fd = open(config_file_path, O_RDONLY);
145 path = eal_runtime_config_path();
146 config_fd = open(path, O_RDONLY);
151 int ret = lockf(config_fd, F_TEST, 0);
157 static struct action_entry *
158 find_action_entry_by_name(const char *name)
160 struct action_entry *entry;
162 TAILQ_FOREACH(entry, &action_entry_list, next) {
163 if (strncmp(entry->action_name, name, RTE_MP_MAX_NAME_LEN) == 0)
171 validate_action_name(const char *name)
174 RTE_LOG(ERR, EAL, "Action name cannot be NULL\n");
178 if (strnlen(name, RTE_MP_MAX_NAME_LEN) == 0) {
179 RTE_LOG(ERR, EAL, "Length of action name is zero\n");
183 if (strnlen(name, RTE_MP_MAX_NAME_LEN) == RTE_MP_MAX_NAME_LEN) {
190 int __rte_experimental
191 rte_mp_action_register(const char *name, rte_mp_t action)
193 struct action_entry *entry;
195 if (validate_action_name(name))
198 entry = malloc(sizeof(struct action_entry));
203 strlcpy(entry->action_name, name, sizeof(entry->action_name));
204 entry->action = action;
206 pthread_mutex_lock(&mp_mutex_action);
207 if (find_action_entry_by_name(name) != NULL) {
208 pthread_mutex_unlock(&mp_mutex_action);
213 TAILQ_INSERT_TAIL(&action_entry_list, entry, next);
214 pthread_mutex_unlock(&mp_mutex_action);
218 void __rte_experimental
219 rte_mp_action_unregister(const char *name)
221 struct action_entry *entry;
223 if (validate_action_name(name))
226 pthread_mutex_lock(&mp_mutex_action);
227 entry = find_action_entry_by_name(name);
229 pthread_mutex_unlock(&mp_mutex_action);
232 TAILQ_REMOVE(&action_entry_list, entry, next);
233 pthread_mutex_unlock(&mp_mutex_action);
238 read_msg(struct mp_msg_internal *m, struct sockaddr_un *s)
243 char control[CMSG_SPACE(sizeof(m->msg.fds))];
244 struct cmsghdr *cmsg;
245 int buflen = sizeof(*m) - sizeof(m->msg.fds);
247 memset(&msgh, 0, sizeof(msgh));
249 iov.iov_len = buflen;
252 msgh.msg_namelen = sizeof(*s);
255 msgh.msg_control = control;
256 msgh.msg_controllen = sizeof(control);
258 msglen = recvmsg(mp_fd, &msgh, 0);
260 RTE_LOG(ERR, EAL, "recvmsg failed, %s\n", strerror(errno));
264 if (msglen != buflen || (msgh.msg_flags & (MSG_TRUNC | MSG_CTRUNC))) {
265 RTE_LOG(ERR, EAL, "truncted msg\n");
269 /* read auxiliary FDs if any */
270 for (cmsg = CMSG_FIRSTHDR(&msgh); cmsg != NULL;
271 cmsg = CMSG_NXTHDR(&msgh, cmsg)) {
272 if ((cmsg->cmsg_level == SOL_SOCKET) &&
273 (cmsg->cmsg_type == SCM_RIGHTS)) {
274 memcpy(m->msg.fds, CMSG_DATA(cmsg), sizeof(m->msg.fds));
283 process_msg(struct mp_msg_internal *m, struct sockaddr_un *s)
285 struct pending_request *sync_req;
286 struct action_entry *entry;
287 struct rte_mp_msg *msg = &m->msg;
288 rte_mp_t action = NULL;
290 RTE_LOG(DEBUG, EAL, "msg: %s\n", msg->name);
292 if (m->type == MP_REP || m->type == MP_IGN) {
293 pthread_mutex_lock(&pending_requests.lock);
294 sync_req = find_sync_request(s->sun_path, msg->name);
296 memcpy(sync_req->reply, msg, sizeof(*msg));
297 /* -1 indicates that we've been asked to ignore */
298 sync_req->reply_received = m->type == MP_REP ? 1 : -1;
300 if (sync_req->type == REQUEST_TYPE_SYNC)
301 pthread_cond_signal(&sync_req->sync.cond);
302 else if (sync_req->type == REQUEST_TYPE_ASYNC)
304 &pending_requests.async_cond);
306 RTE_LOG(ERR, EAL, "Drop mp reply: %s\n", msg->name);
307 pthread_mutex_unlock(&pending_requests.lock);
311 pthread_mutex_lock(&mp_mutex_action);
312 entry = find_action_entry_by_name(msg->name);
314 action = entry->action;
315 pthread_mutex_unlock(&mp_mutex_action);
318 if (m->type == MP_REQ && !internal_config.init_complete) {
319 /* if this is a request, and init is not yet complete,
320 * and callback wasn't registered, we should tell the
321 * requester to ignore our existence because we're not
322 * yet ready to process this request.
324 struct rte_mp_msg dummy;
325 memset(&dummy, 0, sizeof(dummy));
326 strlcpy(dummy.name, msg->name, sizeof(dummy.name));
327 mp_send(&dummy, s->sun_path, MP_IGN);
329 RTE_LOG(ERR, EAL, "Cannot find action: %s\n",
332 } else if (action(msg, s->sun_path) < 0) {
333 RTE_LOG(ERR, EAL, "Fail to handle message: %s\n", msg->name);
338 mp_handle(void *arg __rte_unused)
340 struct mp_msg_internal msg;
341 struct sockaddr_un sa;
344 if (read_msg(&msg, &sa) == 0)
345 process_msg(&msg, &sa);
352 timespec_cmp(const struct timespec *a, const struct timespec *b)
354 if (a->tv_sec < b->tv_sec)
356 if (a->tv_sec > b->tv_sec)
358 if (a->tv_nsec < b->tv_nsec)
360 if (a->tv_nsec > b->tv_nsec)
366 ACTION_NONE, /**< don't do anything */
367 ACTION_FREE, /**< free the action entry, but don't trigger callback */
368 ACTION_TRIGGER /**< trigger callback, then free action entry */
371 static enum async_action
372 process_async_request(struct pending_request *sr, const struct timespec *now)
374 struct async_request_param *param;
375 struct rte_mp_reply *reply;
376 bool timeout, received, last_msg;
378 param = sr->async.param;
379 reply = ¶m->user_reply;
381 /* did we timeout? */
382 timeout = timespec_cmp(¶m->end, now) <= 0;
384 /* did we receive a response? */
385 received = sr->reply_received != 0;
387 /* if we didn't time out, and we didn't receive a response, ignore */
388 if (!timeout && !received)
391 /* if we received a response, adjust relevant data and copy mesasge. */
392 if (sr->reply_received == 1 && sr->reply) {
393 struct rte_mp_msg *msg, *user_msgs, *tmp;
396 user_msgs = reply->msgs;
398 tmp = realloc(user_msgs, sizeof(*msg) *
399 (reply->nb_received + 1));
401 RTE_LOG(ERR, EAL, "Fail to alloc reply for request %s:%s\n",
402 sr->dst, sr->request->name);
403 /* this entry is going to be removed and its message
404 * dropped, but we don't want to leak memory, so
409 reply->msgs = user_msgs;
410 memcpy(&user_msgs[reply->nb_received],
412 reply->nb_received++;
415 /* mark this request as processed */
416 param->n_responses_processed++;
417 } else if (sr->reply_received == -1) {
418 /* we were asked to ignore this process */
423 last_msg = param->n_responses_processed == reply->nb_sent;
425 return last_msg ? ACTION_TRIGGER : ACTION_FREE;
429 trigger_async_action(struct pending_request *sr)
431 struct async_request_param *param;
432 struct rte_mp_reply *reply;
434 param = sr->async.param;
435 reply = ¶m->user_reply;
437 param->clb(sr->request, reply);
440 free(sr->async.param->user_reply.msgs);
441 free(sr->async.param);
445 static struct pending_request *
446 check_trigger(struct timespec *ts)
448 struct pending_request *next, *cur, *trigger = NULL;
450 TAILQ_FOREACH_SAFE(cur, &pending_requests.requests, next, next) {
451 enum async_action action;
452 if (cur->type != REQUEST_TYPE_ASYNC)
455 action = process_async_request(cur, ts);
456 if (action == ACTION_FREE) {
457 TAILQ_REMOVE(&pending_requests.requests, cur, next);
459 } else if (action == ACTION_TRIGGER) {
460 TAILQ_REMOVE(&pending_requests.requests, cur, next);
469 wait_for_async_messages(void)
471 struct pending_request *sr;
472 struct timespec timeout;
473 bool timedwait = false;
477 /* scan through the list and see if there are any timeouts that
478 * are earlier than our current timeout.
480 TAILQ_FOREACH(sr, &pending_requests.requests, next) {
481 if (sr->type != REQUEST_TYPE_ASYNC)
483 if (!timedwait || timespec_cmp(&sr->async.param->end,
485 memcpy(&timeout, &sr->async.param->end,
490 /* sometimes, we don't even wait */
491 if (sr->reply_received) {
502 pthread_cond_timedwait(
503 &pending_requests.async_cond,
504 &pending_requests.lock,
507 &pending_requests.async_cond,
508 &pending_requests.lock);
509 } while (ret != 0 && ret != ETIMEDOUT);
511 /* we've been woken up or timed out */
515 async_reply_handle(void *arg __rte_unused)
518 struct timespec ts_now;
520 struct pending_request *trigger = NULL;
522 pthread_mutex_lock(&pending_requests.lock);
524 /* we exit this function holding the lock */
525 wait_for_async_messages();
527 if (gettimeofday(&now, NULL) < 0) {
528 RTE_LOG(ERR, EAL, "Cannot get current time\n");
531 ts_now.tv_nsec = now.tv_usec * 1000;
532 ts_now.tv_sec = now.tv_sec;
535 trigger = check_trigger(&ts_now);
536 /* unlock request list */
537 pthread_mutex_unlock(&pending_requests.lock);
540 trigger_async_action(trigger);
543 /* we've triggered a callback, but there may be
544 * more, so lock the list and check again.
546 pthread_mutex_lock(&pending_requests.lock);
551 RTE_LOG(ERR, EAL, "ERROR: asynchronous requests disabled\n");
559 char peer_name[PATH_MAX] = {0};
560 struct sockaddr_un un;
562 if (rte_eal_process_type() == RTE_PROC_SECONDARY)
563 snprintf(peer_name, sizeof(peer_name),
564 "%d_%"PRIx64, getpid(), rte_rdtsc());
566 mp_fd = socket(AF_UNIX, SOCK_DGRAM, 0);
568 RTE_LOG(ERR, EAL, "failed to create unix socket\n");
572 memset(&un, 0, sizeof(un));
573 un.sun_family = AF_UNIX;
575 create_socket_path(peer_name, un.sun_path, sizeof(un.sun_path));
577 unlink(un.sun_path); /* May still exist since last run */
579 if (bind(mp_fd, (struct sockaddr *)&un, sizeof(un)) < 0) {
580 RTE_LOG(ERR, EAL, "failed to bind %s: %s\n",
581 un.sun_path, strerror(errno));
586 RTE_LOG(INFO, EAL, "Multi-process socket %s\n", un.sun_path);
591 unlink_sockets(const char *filter)
597 mp_dir = opendir(mp_dir_path);
599 RTE_LOG(ERR, EAL, "Unable to open directory %s\n", mp_dir_path);
602 dir_fd = dirfd(mp_dir);
604 while ((ent = readdir(mp_dir))) {
605 if (fnmatch(filter, ent->d_name, 0) == 0)
606 unlinkat(dir_fd, ent->d_name, 0);
614 rte_mp_channel_init(void)
616 char thread_name[RTE_MAX_THREAD_NAME_LEN];
619 pthread_t mp_handle_tid, async_reply_handle_tid;
621 /* create filter path */
622 create_socket_path("*", path, sizeof(path));
623 strlcpy(mp_filter, basename(path), sizeof(mp_filter));
625 /* path may have been modified, so recreate it */
626 create_socket_path("*", path, sizeof(path));
627 strlcpy(mp_dir_path, dirname(path), sizeof(mp_dir_path));
629 /* lock the directory */
630 dir_fd = open(mp_dir_path, O_RDONLY);
632 RTE_LOG(ERR, EAL, "failed to open %s: %s\n",
633 mp_dir_path, strerror(errno));
637 if (flock(dir_fd, LOCK_EX)) {
638 RTE_LOG(ERR, EAL, "failed to lock %s: %s\n",
639 mp_dir_path, strerror(errno));
644 if (rte_eal_process_type() == RTE_PROC_PRIMARY &&
645 unlink_sockets(mp_filter)) {
646 RTE_LOG(ERR, EAL, "failed to unlink mp sockets\n");
651 if (open_socket_fd() < 0) {
656 if (pthread_create(&mp_handle_tid, NULL, mp_handle, NULL) < 0) {
657 RTE_LOG(ERR, EAL, "failed to create mp thead: %s\n",
664 if (pthread_create(&async_reply_handle_tid, NULL,
665 async_reply_handle, NULL) < 0) {
666 RTE_LOG(ERR, EAL, "failed to create mp thead: %s\n",
674 /* try best to set thread name */
675 strlcpy(thread_name, "rte_mp_handle", RTE_MAX_THREAD_NAME_LEN);
676 rte_thread_setname(mp_handle_tid, thread_name);
678 /* try best to set thread name */
679 strlcpy(thread_name, "rte_mp_async_handle", RTE_MAX_THREAD_NAME_LEN);
680 rte_thread_setname(async_reply_handle_tid, thread_name);
682 /* unlock the directory */
683 flock(dir_fd, LOCK_UN);
690 * Return -1, as fail to send message and it's caused by the local side.
691 * Return 0, as fail to send message and it's caused by the remote side.
692 * Return 1, as succeed to send message.
696 send_msg(const char *dst_path, struct rte_mp_msg *msg, int type)
701 struct cmsghdr *cmsg;
702 struct sockaddr_un dst;
703 struct mp_msg_internal m;
704 int fd_size = msg->num_fds * sizeof(int);
705 char control[CMSG_SPACE(fd_size)];
708 memcpy(&m.msg, msg, sizeof(*msg));
710 memset(&dst, 0, sizeof(dst));
711 dst.sun_family = AF_UNIX;
712 strlcpy(dst.sun_path, dst_path, sizeof(dst.sun_path));
714 memset(&msgh, 0, sizeof(msgh));
715 memset(control, 0, sizeof(control));
718 iov.iov_len = sizeof(m) - sizeof(msg->fds);
720 msgh.msg_name = &dst;
721 msgh.msg_namelen = sizeof(dst);
724 msgh.msg_control = control;
725 msgh.msg_controllen = sizeof(control);
727 cmsg = CMSG_FIRSTHDR(&msgh);
728 cmsg->cmsg_len = CMSG_LEN(fd_size);
729 cmsg->cmsg_level = SOL_SOCKET;
730 cmsg->cmsg_type = SCM_RIGHTS;
731 memcpy(CMSG_DATA(cmsg), msg->fds, fd_size);
734 snd = sendmsg(mp_fd, &msgh, 0);
735 } while (snd < 0 && errno == EINTR);
739 /* Check if it caused by peer process exits */
740 if (errno == ECONNREFUSED &&
741 rte_eal_process_type() == RTE_PROC_PRIMARY) {
745 if (errno == ENOBUFS) {
746 RTE_LOG(ERR, EAL, "Peer cannot receive message %s\n",
750 RTE_LOG(ERR, EAL, "failed to send to (%s) due to %s\n",
751 dst_path, strerror(errno));
759 mp_send(struct rte_mp_msg *msg, const char *peer, int type)
765 if (!peer && (rte_eal_process_type() == RTE_PROC_SECONDARY))
766 peer = eal_mp_socket_path();
769 if (send_msg(peer, msg, type) < 0)
775 /* broadcast to all secondary processes */
776 mp_dir = opendir(mp_dir_path);
778 RTE_LOG(ERR, EAL, "Unable to open directory %s\n",
784 dir_fd = dirfd(mp_dir);
785 /* lock the directory to prevent processes spinning up while we send */
786 if (flock(dir_fd, LOCK_EX)) {
787 RTE_LOG(ERR, EAL, "Unable to lock directory %s\n",
794 while ((ent = readdir(mp_dir))) {
797 if (fnmatch(mp_filter, ent->d_name, 0) != 0)
800 snprintf(path, sizeof(path), "%s/%s", mp_dir_path,
802 if (send_msg(path, msg, type) < 0)
806 flock(dir_fd, LOCK_UN);
808 /* dir_fd automatically closed on closedir */
814 check_input(const struct rte_mp_msg *msg)
817 RTE_LOG(ERR, EAL, "Msg cannot be NULL\n");
822 if (validate_action_name(msg->name))
825 if (msg->len_param > RTE_MP_MAX_PARAM_LEN) {
826 RTE_LOG(ERR, EAL, "Message data is too long\n");
831 if (msg->num_fds > RTE_MP_MAX_FD_NUM) {
832 RTE_LOG(ERR, EAL, "Cannot send more than %d FDs\n",
841 int __rte_experimental
842 rte_mp_sendmsg(struct rte_mp_msg *msg)
844 if (!check_input(msg))
847 RTE_LOG(DEBUG, EAL, "sendmsg: %s\n", msg->name);
848 return mp_send(msg, NULL, MP_MSG);
852 mp_request_async(const char *dst, struct rte_mp_msg *req,
853 struct async_request_param *param)
855 struct rte_mp_msg *reply_msg;
856 struct pending_request *sync_req, *exist;
859 sync_req = malloc(sizeof(*sync_req));
860 reply_msg = malloc(sizeof(*reply_msg));
861 if (sync_req == NULL || reply_msg == NULL) {
862 RTE_LOG(ERR, EAL, "Could not allocate space for sync request\n");
868 memset(sync_req, 0, sizeof(*sync_req));
869 memset(reply_msg, 0, sizeof(*reply_msg));
871 sync_req->type = REQUEST_TYPE_ASYNC;
872 strlcpy(sync_req->dst, dst, sizeof(sync_req->dst));
873 sync_req->request = req;
874 sync_req->reply = reply_msg;
875 sync_req->async.param = param;
877 /* queue already locked by caller */
879 exist = find_sync_request(dst, req->name);
881 RTE_LOG(ERR, EAL, "A pending request %s:%s\n", dst, req->name);
887 ret = send_msg(dst, req, MP_REQ);
889 RTE_LOG(ERR, EAL, "Fail to send request %s:%s\n",
893 } else if (ret == 0) {
897 TAILQ_INSERT_TAIL(&pending_requests.requests, sync_req, next);
899 param->user_reply.nb_sent++;
909 mp_request_sync(const char *dst, struct rte_mp_msg *req,
910 struct rte_mp_reply *reply, const struct timespec *ts)
913 struct rte_mp_msg msg, *tmp;
914 struct pending_request sync_req, *exist;
916 sync_req.type = REQUEST_TYPE_SYNC;
917 sync_req.reply_received = 0;
918 strlcpy(sync_req.dst, dst, sizeof(sync_req.dst));
919 sync_req.request = req;
920 sync_req.reply = &msg;
921 pthread_cond_init(&sync_req.sync.cond, NULL);
923 exist = find_sync_request(dst, req->name);
925 RTE_LOG(ERR, EAL, "A pending request %s:%s\n", dst, req->name);
930 ret = send_msg(dst, req, MP_REQ);
932 RTE_LOG(ERR, EAL, "Fail to send request %s:%s\n",
938 TAILQ_INSERT_TAIL(&pending_requests.requests, &sync_req, next);
943 ret = pthread_cond_timedwait(&sync_req.sync.cond,
944 &pending_requests.lock, ts);
945 } while (ret != 0 && ret != ETIMEDOUT);
947 TAILQ_REMOVE(&pending_requests.requests, &sync_req, next);
949 if (sync_req.reply_received == 0) {
950 RTE_LOG(ERR, EAL, "Fail to recv reply for request %s:%s\n",
952 rte_errno = ETIMEDOUT;
955 if (sync_req.reply_received == -1) {
956 RTE_LOG(DEBUG, EAL, "Asked to ignore response\n");
957 /* not receiving this message is not an error, so decrement
958 * number of sent messages
964 tmp = realloc(reply->msgs, sizeof(msg) * (reply->nb_received + 1));
966 RTE_LOG(ERR, EAL, "Fail to alloc reply for request %s:%s\n",
971 memcpy(&tmp[reply->nb_received], &msg, sizeof(msg));
973 reply->nb_received++;
977 int __rte_experimental
978 rte_mp_request_sync(struct rte_mp_msg *req, struct rte_mp_reply *reply,
979 const struct timespec *ts)
987 RTE_LOG(DEBUG, EAL, "request: %s\n", req->name);
989 if (check_input(req) == false)
991 if (gettimeofday(&now, NULL) < 0) {
992 RTE_LOG(ERR, EAL, "Faile to get current time\n");
997 end.tv_nsec = (now.tv_usec * 1000 + ts->tv_nsec) % 1000000000;
998 end.tv_sec = now.tv_sec + ts->tv_sec +
999 (now.tv_usec * 1000 + ts->tv_nsec) / 1000000000;
1002 reply->nb_received = 0;
1005 /* for secondary process, send request to the primary process only */
1006 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1007 pthread_mutex_lock(&pending_requests.lock);
1008 ret = mp_request_sync(eal_mp_socket_path(), req, reply, &end);
1009 pthread_mutex_unlock(&pending_requests.lock);
1013 /* for primary process, broadcast request, and collect reply 1 by 1 */
1014 mp_dir = opendir(mp_dir_path);
1016 RTE_LOG(ERR, EAL, "Unable to open directory %s\n", mp_dir_path);
1021 dir_fd = dirfd(mp_dir);
1022 /* lock the directory to prevent processes spinning up while we send */
1023 if (flock(dir_fd, LOCK_EX)) {
1024 RTE_LOG(ERR, EAL, "Unable to lock directory %s\n",
1031 pthread_mutex_lock(&pending_requests.lock);
1032 while ((ent = readdir(mp_dir))) {
1033 char path[PATH_MAX];
1035 if (fnmatch(mp_filter, ent->d_name, 0) != 0)
1038 snprintf(path, sizeof(path), "%s/%s", mp_dir_path,
1041 /* unlocks the mutex while waiting for response,
1044 if (mp_request_sync(path, req, reply, &end))
1047 pthread_mutex_unlock(&pending_requests.lock);
1048 /* unlock the directory */
1049 flock(dir_fd, LOCK_UN);
1051 /* dir_fd automatically closed on closedir */
1056 int __rte_experimental
1057 rte_mp_request_async(struct rte_mp_msg *req, const struct timespec *ts,
1058 rte_mp_async_reply_t clb)
1060 struct rte_mp_msg *copy;
1061 struct pending_request *dummy;
1062 struct async_request_param *param;
1063 struct rte_mp_reply *reply;
1064 int dir_fd, ret = 0;
1068 struct timespec *end;
1069 bool dummy_used = false;
1071 RTE_LOG(DEBUG, EAL, "request: %s\n", req->name);
1073 if (check_input(req) == false)
1075 if (gettimeofday(&now, NULL) < 0) {
1076 RTE_LOG(ERR, EAL, "Faile to get current time\n");
1080 copy = malloc(sizeof(*copy));
1081 dummy = malloc(sizeof(*dummy));
1082 param = malloc(sizeof(*param));
1083 if (copy == NULL || dummy == NULL || param == NULL) {
1084 RTE_LOG(ERR, EAL, "Failed to allocate memory for async reply\n");
1089 memset(copy, 0, sizeof(*copy));
1090 memset(dummy, 0, sizeof(*dummy));
1091 memset(param, 0, sizeof(*param));
1094 memcpy(copy, req, sizeof(*copy));
1096 param->n_responses_processed = 0;
1099 reply = ¶m->user_reply;
1101 end->tv_nsec = (now.tv_usec * 1000 + ts->tv_nsec) % 1000000000;
1102 end->tv_sec = now.tv_sec + ts->tv_sec +
1103 (now.tv_usec * 1000 + ts->tv_nsec) / 1000000000;
1105 reply->nb_received = 0;
1108 /* we have to lock the request queue here, as we will be adding a bunch
1109 * of requests to the queue at once, and some of the replies may arrive
1110 * before we add all of the requests to the queue.
1112 pthread_mutex_lock(&pending_requests.lock);
1114 /* we have to ensure that callback gets triggered even if we don't send
1115 * anything, therefore earlier we have allocated a dummy request. fill
1116 * it, and put it on the queue if we don't send any requests.
1118 dummy->type = REQUEST_TYPE_ASYNC;
1119 dummy->request = copy;
1120 dummy->reply = NULL;
1121 dummy->async.param = param;
1122 dummy->reply_received = 1; /* short-circuit the timeout */
1124 /* for secondary process, send request to the primary process only */
1125 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1126 ret = mp_request_async(eal_mp_socket_path(), copy, param);
1128 /* if we didn't send anything, put dummy request on the queue */
1129 if (ret == 0 && reply->nb_sent == 0) {
1130 TAILQ_INSERT_TAIL(&pending_requests.requests, dummy,
1135 pthread_mutex_unlock(&pending_requests.lock);
1137 /* if we couldn't send anything, clean up */
1143 /* for primary process, broadcast request */
1144 mp_dir = opendir(mp_dir_path);
1146 RTE_LOG(ERR, EAL, "Unable to open directory %s\n", mp_dir_path);
1150 dir_fd = dirfd(mp_dir);
1152 /* lock the directory to prevent processes spinning up while we send */
1153 if (flock(dir_fd, LOCK_EX)) {
1154 RTE_LOG(ERR, EAL, "Unable to lock directory %s\n",
1160 while ((ent = readdir(mp_dir))) {
1161 char path[PATH_MAX];
1163 if (fnmatch(mp_filter, ent->d_name, 0) != 0)
1166 snprintf(path, sizeof(path), "%s/%s", mp_dir_path,
1169 if (mp_request_async(path, copy, param))
1172 /* if we didn't send anything, put dummy request on the queue */
1173 if (ret == 0 && reply->nb_sent == 0) {
1174 TAILQ_INSERT_HEAD(&pending_requests.requests, dummy, next);
1178 /* trigger async request thread wake up */
1179 pthread_cond_signal(&pending_requests.async_cond);
1181 /* finally, unlock the queue */
1182 pthread_mutex_unlock(&pending_requests.lock);
1184 /* unlock the directory */
1185 flock(dir_fd, LOCK_UN);
1187 /* dir_fd automatically closed on closedir */
1190 /* if dummy was unused, free it */
1198 pthread_mutex_unlock(&pending_requests.lock);
1206 int __rte_experimental
1207 rte_mp_reply(struct rte_mp_msg *msg, const char *peer)
1209 RTE_LOG(DEBUG, EAL, "reply: %s\n", msg->name);
1211 if (check_input(msg) == false)
1215 RTE_LOG(ERR, EAL, "peer is not specified\n");
1220 return mp_send(msg, peer, MP_REP);