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_alarm.h>
24 #include <rte_common.h>
25 #include <rte_cycles.h>
27 #include <rte_errno.h>
28 #include <rte_lcore.h>
30 #include <rte_tailq.h>
32 #include "eal_private.h"
33 #include "eal_filesystem.h"
34 #include "eal_internal_cfg.h"
36 static int mp_fd = -1;
37 static char mp_filter[PATH_MAX]; /* Filter for secondary process sockets */
38 static char mp_dir_path[PATH_MAX]; /* The directory path for all mp sockets */
39 static pthread_mutex_t mp_mutex_action = PTHREAD_MUTEX_INITIALIZER;
40 static char peer_name[PATH_MAX];
43 TAILQ_ENTRY(action_entry) next;
44 char action_name[RTE_MP_MAX_NAME_LEN];
48 /** Double linked list of actions. */
49 TAILQ_HEAD(action_entry_list, action_entry);
51 static struct action_entry_list action_entry_list =
52 TAILQ_HEAD_INITIALIZER(action_entry_list);
55 MP_MSG, /* Share message with peers, will not block */
56 MP_REQ, /* Request for information, Will block for a reply */
57 MP_REP, /* Response to previously-received request */
58 MP_IGN, /* Response telling requester to ignore this response */
61 struct mp_msg_internal {
63 struct rte_mp_msg msg;
66 struct async_request_param {
67 rte_mp_async_reply_t clb;
68 struct rte_mp_reply user_reply;
70 int n_responses_processed;
73 struct pending_request {
74 TAILQ_ENTRY(pending_request) next;
80 struct rte_mp_msg *request;
81 struct rte_mp_msg *reply;
86 struct async_request_param *param;
94 TAILQ_HEAD(pending_request_list, pending_request);
97 struct pending_request_list requests;
99 } pending_requests = {
100 .requests = TAILQ_HEAD_INITIALIZER(pending_requests.requests),
101 .lock = PTHREAD_MUTEX_INITIALIZER,
102 /**< used in async requests only */
105 /* forward declarations */
107 mp_send(struct rte_mp_msg *msg, const char *peer, int type);
109 /* for use with alarm callback */
111 async_reply_handle(void *arg);
113 /* for use with process_msg */
114 static struct pending_request *
115 async_reply_handle_thread_unsafe(void *arg);
118 trigger_async_action(struct pending_request *req);
120 static struct pending_request *
121 find_pending_request(const char *dst, const char *act_name)
123 struct pending_request *r;
125 TAILQ_FOREACH(r, &pending_requests.requests, next) {
126 if (!strcmp(r->dst, dst) &&
127 !strcmp(r->request->name, act_name))
135 create_socket_path(const char *name, char *buf, int len)
137 const char *prefix = eal_mp_socket_path();
139 if (strlen(name) > 0)
140 snprintf(buf, len, "%s_%s", prefix, name);
142 strlcpy(buf, prefix, len);
146 rte_eal_primary_proc_alive(const char *config_file_path)
150 if (config_file_path)
151 config_fd = open(config_file_path, O_RDONLY);
155 path = eal_runtime_config_path();
156 config_fd = open(path, O_RDONLY);
161 int ret = lockf(config_fd, F_TEST, 0);
167 static struct action_entry *
168 find_action_entry_by_name(const char *name)
170 struct action_entry *entry;
172 TAILQ_FOREACH(entry, &action_entry_list, next) {
173 if (strncmp(entry->action_name, name, RTE_MP_MAX_NAME_LEN) == 0)
181 validate_action_name(const char *name)
184 RTE_LOG(ERR, EAL, "Action name cannot be NULL\n");
188 if (strnlen(name, RTE_MP_MAX_NAME_LEN) == 0) {
189 RTE_LOG(ERR, EAL, "Length of action name is zero\n");
193 if (strnlen(name, RTE_MP_MAX_NAME_LEN) == RTE_MP_MAX_NAME_LEN) {
200 int __rte_experimental
201 rte_mp_action_register(const char *name, rte_mp_t action)
203 struct action_entry *entry;
205 if (validate_action_name(name))
208 entry = malloc(sizeof(struct action_entry));
213 strlcpy(entry->action_name, name, sizeof(entry->action_name));
214 entry->action = action;
216 pthread_mutex_lock(&mp_mutex_action);
217 if (find_action_entry_by_name(name) != NULL) {
218 pthread_mutex_unlock(&mp_mutex_action);
223 TAILQ_INSERT_TAIL(&action_entry_list, entry, next);
224 pthread_mutex_unlock(&mp_mutex_action);
228 void __rte_experimental
229 rte_mp_action_unregister(const char *name)
231 struct action_entry *entry;
233 if (validate_action_name(name))
236 pthread_mutex_lock(&mp_mutex_action);
237 entry = find_action_entry_by_name(name);
239 pthread_mutex_unlock(&mp_mutex_action);
242 TAILQ_REMOVE(&action_entry_list, entry, next);
243 pthread_mutex_unlock(&mp_mutex_action);
248 read_msg(struct mp_msg_internal *m, struct sockaddr_un *s)
253 char control[CMSG_SPACE(sizeof(m->msg.fds))];
254 struct cmsghdr *cmsg;
255 int buflen = sizeof(*m) - sizeof(m->msg.fds);
257 memset(&msgh, 0, sizeof(msgh));
259 iov.iov_len = buflen;
262 msgh.msg_namelen = sizeof(*s);
265 msgh.msg_control = control;
266 msgh.msg_controllen = sizeof(control);
268 msglen = recvmsg(mp_fd, &msgh, 0);
270 RTE_LOG(ERR, EAL, "recvmsg failed, %s\n", strerror(errno));
274 if (msglen != buflen || (msgh.msg_flags & (MSG_TRUNC | MSG_CTRUNC))) {
275 RTE_LOG(ERR, EAL, "truncted msg\n");
279 /* read auxiliary FDs if any */
280 for (cmsg = CMSG_FIRSTHDR(&msgh); cmsg != NULL;
281 cmsg = CMSG_NXTHDR(&msgh, cmsg)) {
282 if ((cmsg->cmsg_level == SOL_SOCKET) &&
283 (cmsg->cmsg_type == SCM_RIGHTS)) {
284 memcpy(m->msg.fds, CMSG_DATA(cmsg), sizeof(m->msg.fds));
293 process_msg(struct mp_msg_internal *m, struct sockaddr_un *s)
295 struct pending_request *pending_req;
296 struct action_entry *entry;
297 struct rte_mp_msg *msg = &m->msg;
298 rte_mp_t action = NULL;
300 RTE_LOG(DEBUG, EAL, "msg: %s\n", msg->name);
302 if (m->type == MP_REP || m->type == MP_IGN) {
303 struct pending_request *req = NULL;
305 pthread_mutex_lock(&pending_requests.lock);
306 pending_req = find_pending_request(s->sun_path, msg->name);
308 memcpy(pending_req->reply, msg, sizeof(*msg));
309 /* -1 indicates that we've been asked to ignore */
310 pending_req->reply_received =
311 m->type == MP_REP ? 1 : -1;
313 if (pending_req->type == REQUEST_TYPE_SYNC)
314 pthread_cond_signal(&pending_req->sync.cond);
315 else if (pending_req->type == REQUEST_TYPE_ASYNC)
316 req = async_reply_handle_thread_unsafe(
319 RTE_LOG(ERR, EAL, "Drop mp reply: %s\n", msg->name);
320 pthread_mutex_unlock(&pending_requests.lock);
323 trigger_async_action(req);
327 pthread_mutex_lock(&mp_mutex_action);
328 entry = find_action_entry_by_name(msg->name);
330 action = entry->action;
331 pthread_mutex_unlock(&mp_mutex_action);
334 if (m->type == MP_REQ && !internal_config.init_complete) {
335 /* if this is a request, and init is not yet complete,
336 * and callback wasn't registered, we should tell the
337 * requester to ignore our existence because we're not
338 * yet ready to process this request.
340 struct rte_mp_msg dummy;
342 memset(&dummy, 0, sizeof(dummy));
343 strlcpy(dummy.name, msg->name, sizeof(dummy.name));
344 mp_send(&dummy, s->sun_path, MP_IGN);
346 RTE_LOG(ERR, EAL, "Cannot find action: %s\n",
349 } else if (action(msg, s->sun_path) < 0) {
350 RTE_LOG(ERR, EAL, "Fail to handle message: %s\n", msg->name);
355 mp_handle(void *arg __rte_unused)
357 struct mp_msg_internal msg;
358 struct sockaddr_un sa;
361 if (read_msg(&msg, &sa) == 0)
362 process_msg(&msg, &sa);
369 timespec_cmp(const struct timespec *a, const struct timespec *b)
371 if (a->tv_sec < b->tv_sec)
373 if (a->tv_sec > b->tv_sec)
375 if (a->tv_nsec < b->tv_nsec)
377 if (a->tv_nsec > b->tv_nsec)
383 ACTION_FREE, /**< free the action entry, but don't trigger callback */
384 ACTION_TRIGGER /**< trigger callback, then free action entry */
387 static enum async_action
388 process_async_request(struct pending_request *sr, const struct timespec *now)
390 struct async_request_param *param;
391 struct rte_mp_reply *reply;
392 bool timeout, last_msg;
394 param = sr->async.param;
395 reply = ¶m->user_reply;
397 /* did we timeout? */
398 timeout = timespec_cmp(¶m->end, now) <= 0;
400 /* if we received a response, adjust relevant data and copy mesasge. */
401 if (sr->reply_received == 1 && sr->reply) {
402 struct rte_mp_msg *msg, *user_msgs, *tmp;
405 user_msgs = reply->msgs;
407 tmp = realloc(user_msgs, sizeof(*msg) *
408 (reply->nb_received + 1));
410 RTE_LOG(ERR, EAL, "Fail to alloc reply for request %s:%s\n",
411 sr->dst, sr->request->name);
412 /* this entry is going to be removed and its message
413 * dropped, but we don't want to leak memory, so
418 reply->msgs = user_msgs;
419 memcpy(&user_msgs[reply->nb_received],
421 reply->nb_received++;
424 /* mark this request as processed */
425 param->n_responses_processed++;
426 } else if (sr->reply_received == -1) {
427 /* we were asked to ignore this process */
429 } else if (timeout) {
430 /* count it as processed response, but don't increment
433 param->n_responses_processed++;
438 last_msg = param->n_responses_processed == reply->nb_sent;
440 return last_msg ? ACTION_TRIGGER : ACTION_FREE;
444 trigger_async_action(struct pending_request *sr)
446 struct async_request_param *param;
447 struct rte_mp_reply *reply;
449 param = sr->async.param;
450 reply = ¶m->user_reply;
452 param->clb(sr->request, reply);
455 free(sr->async.param->user_reply.msgs);
456 free(sr->async.param);
461 static struct pending_request *
462 async_reply_handle_thread_unsafe(void *arg)
464 struct pending_request *req = (struct pending_request *)arg;
465 enum async_action action;
466 struct timespec ts_now;
469 if (gettimeofday(&now, NULL) < 0) {
470 RTE_LOG(ERR, EAL, "Cannot get current time\n");
473 ts_now.tv_nsec = now.tv_usec * 1000;
474 ts_now.tv_sec = now.tv_sec;
476 action = process_async_request(req, &ts_now);
478 TAILQ_REMOVE(&pending_requests.requests, req, next);
480 if (rte_eal_alarm_cancel(async_reply_handle, req) < 0) {
481 /* if we failed to cancel the alarm because it's already in
482 * progress, don't proceed because otherwise we will end up
483 * handling the same message twice.
485 if (rte_errno == EINPROGRESS) {
486 RTE_LOG(DEBUG, EAL, "Request handling is already in progress\n");
489 RTE_LOG(ERR, EAL, "Failed to cancel alarm\n");
492 if (action == ACTION_TRIGGER)
500 async_reply_handle(void *arg)
502 struct pending_request *req;
504 pthread_mutex_lock(&pending_requests.lock);
505 req = async_reply_handle_thread_unsafe(arg);
506 pthread_mutex_unlock(&pending_requests.lock);
509 trigger_async_action(req);
515 struct sockaddr_un un;
518 if (rte_eal_process_type() == RTE_PROC_SECONDARY)
519 snprintf(peer_name, sizeof(peer_name),
520 "%d_%"PRIx64, getpid(), rte_rdtsc());
522 mp_fd = socket(AF_UNIX, SOCK_DGRAM, 0);
524 RTE_LOG(ERR, EAL, "failed to create unix socket\n");
528 memset(&un, 0, sizeof(un));
529 un.sun_family = AF_UNIX;
531 create_socket_path(peer_name, un.sun_path, sizeof(un.sun_path));
533 unlink(un.sun_path); /* May still exist since last run */
535 if (bind(mp_fd, (struct sockaddr *)&un, sizeof(un)) < 0) {
536 RTE_LOG(ERR, EAL, "failed to bind %s: %s\n",
537 un.sun_path, strerror(errno));
542 RTE_LOG(INFO, EAL, "Multi-process socket %s\n", un.sun_path);
547 close_socket_fd(void)
555 create_socket_path(peer_name, path, sizeof(path));
560 rte_mp_channel_init(void)
564 pthread_t mp_handle_tid;
566 /* in no shared files mode, we do not have secondary processes support,
567 * so no need to initialize IPC.
569 if (internal_config.no_shconf) {
570 RTE_LOG(DEBUG, EAL, "No shared files mode enabled, IPC will be disabled\n");
574 /* create filter path */
575 create_socket_path("*", path, sizeof(path));
576 strlcpy(mp_filter, basename(path), sizeof(mp_filter));
578 /* path may have been modified, so recreate it */
579 create_socket_path("*", path, sizeof(path));
580 strlcpy(mp_dir_path, dirname(path), sizeof(mp_dir_path));
582 /* lock the directory */
583 dir_fd = open(mp_dir_path, O_RDONLY);
585 RTE_LOG(ERR, EAL, "failed to open %s: %s\n",
586 mp_dir_path, strerror(errno));
590 if (flock(dir_fd, LOCK_EX)) {
591 RTE_LOG(ERR, EAL, "failed to lock %s: %s\n",
592 mp_dir_path, strerror(errno));
597 if (open_socket_fd() < 0) {
602 if (rte_ctrl_thread_create(&mp_handle_tid, "rte_mp_handle",
603 NULL, mp_handle, NULL) < 0) {
604 RTE_LOG(ERR, EAL, "failed to create mp thead: %s\n",
612 /* unlock the directory */
613 flock(dir_fd, LOCK_UN);
620 rte_mp_channel_cleanup(void)
626 * Return -1, as fail to send message and it's caused by the local side.
627 * Return 0, as fail to send message and it's caused by the remote side.
628 * Return 1, as succeed to send message.
632 send_msg(const char *dst_path, struct rte_mp_msg *msg, int type)
637 struct cmsghdr *cmsg;
638 struct sockaddr_un dst;
639 struct mp_msg_internal m;
640 int fd_size = msg->num_fds * sizeof(int);
641 char control[CMSG_SPACE(fd_size)];
644 memcpy(&m.msg, msg, sizeof(*msg));
646 memset(&dst, 0, sizeof(dst));
647 dst.sun_family = AF_UNIX;
648 strlcpy(dst.sun_path, dst_path, sizeof(dst.sun_path));
650 memset(&msgh, 0, sizeof(msgh));
651 memset(control, 0, sizeof(control));
654 iov.iov_len = sizeof(m) - sizeof(msg->fds);
656 msgh.msg_name = &dst;
657 msgh.msg_namelen = sizeof(dst);
660 msgh.msg_control = control;
661 msgh.msg_controllen = sizeof(control);
663 cmsg = CMSG_FIRSTHDR(&msgh);
664 cmsg->cmsg_len = CMSG_LEN(fd_size);
665 cmsg->cmsg_level = SOL_SOCKET;
666 cmsg->cmsg_type = SCM_RIGHTS;
667 memcpy(CMSG_DATA(cmsg), msg->fds, fd_size);
670 snd = sendmsg(mp_fd, &msgh, 0);
671 } while (snd < 0 && errno == EINTR);
675 /* Check if it caused by peer process exits */
676 if (errno == ECONNREFUSED &&
677 rte_eal_process_type() == RTE_PROC_PRIMARY) {
681 if (errno == ENOBUFS) {
682 RTE_LOG(ERR, EAL, "Peer cannot receive message %s\n",
686 RTE_LOG(ERR, EAL, "failed to send to (%s) due to %s\n",
687 dst_path, strerror(errno));
695 mp_send(struct rte_mp_msg *msg, const char *peer, int type)
701 if (!peer && (rte_eal_process_type() == RTE_PROC_SECONDARY))
702 peer = eal_mp_socket_path();
705 if (send_msg(peer, msg, type) < 0)
711 /* broadcast to all secondary processes */
712 mp_dir = opendir(mp_dir_path);
714 RTE_LOG(ERR, EAL, "Unable to open directory %s\n",
720 dir_fd = dirfd(mp_dir);
721 /* lock the directory to prevent processes spinning up while we send */
722 if (flock(dir_fd, LOCK_SH)) {
723 RTE_LOG(ERR, EAL, "Unable to lock directory %s\n",
730 while ((ent = readdir(mp_dir))) {
733 if (fnmatch(mp_filter, ent->d_name, 0) != 0)
736 snprintf(path, sizeof(path), "%s/%s", mp_dir_path,
738 if (send_msg(path, msg, type) < 0)
742 flock(dir_fd, LOCK_UN);
744 /* dir_fd automatically closed on closedir */
750 check_input(const struct rte_mp_msg *msg)
753 RTE_LOG(ERR, EAL, "Msg cannot be NULL\n");
758 if (validate_action_name(msg->name))
761 if (msg->len_param > RTE_MP_MAX_PARAM_LEN) {
762 RTE_LOG(ERR, EAL, "Message data is too long\n");
767 if (msg->num_fds > RTE_MP_MAX_FD_NUM) {
768 RTE_LOG(ERR, EAL, "Cannot send more than %d FDs\n",
777 int __rte_experimental
778 rte_mp_sendmsg(struct rte_mp_msg *msg)
780 if (!check_input(msg))
783 RTE_LOG(DEBUG, EAL, "sendmsg: %s\n", msg->name);
784 return mp_send(msg, NULL, MP_MSG);
788 mp_request_async(const char *dst, struct rte_mp_msg *req,
789 struct async_request_param *param, const struct timespec *ts)
791 struct rte_mp_msg *reply_msg;
792 struct pending_request *pending_req, *exist;
795 pending_req = calloc(1, sizeof(*pending_req));
796 reply_msg = calloc(1, sizeof(*reply_msg));
797 if (pending_req == NULL || reply_msg == NULL) {
798 RTE_LOG(ERR, EAL, "Could not allocate space for sync request\n");
804 pending_req->type = REQUEST_TYPE_ASYNC;
805 strlcpy(pending_req->dst, dst, sizeof(pending_req->dst));
806 pending_req->request = req;
807 pending_req->reply = reply_msg;
808 pending_req->async.param = param;
810 /* queue already locked by caller */
812 exist = find_pending_request(dst, req->name);
814 RTE_LOG(ERR, EAL, "A pending request %s:%s\n", dst, req->name);
820 ret = send_msg(dst, req, MP_REQ);
822 RTE_LOG(ERR, EAL, "Fail to send request %s:%s\n",
826 } else if (ret == 0) {
830 param->user_reply.nb_sent++;
832 /* if alarm set fails, we simply ignore the reply */
833 if (rte_eal_alarm_set(ts->tv_sec * 1000000 + ts->tv_nsec / 1000,
834 async_reply_handle, pending_req) < 0) {
835 RTE_LOG(ERR, EAL, "Fail to set alarm for request %s:%s\n",
840 TAILQ_INSERT_TAIL(&pending_requests.requests, pending_req, next);
850 mp_request_sync(const char *dst, struct rte_mp_msg *req,
851 struct rte_mp_reply *reply, const struct timespec *ts)
854 struct rte_mp_msg msg, *tmp;
855 struct pending_request pending_req, *exist;
857 pending_req.type = REQUEST_TYPE_SYNC;
858 pending_req.reply_received = 0;
859 strlcpy(pending_req.dst, dst, sizeof(pending_req.dst));
860 pending_req.request = req;
861 pending_req.reply = &msg;
862 pthread_cond_init(&pending_req.sync.cond, NULL);
864 exist = find_pending_request(dst, req->name);
866 RTE_LOG(ERR, EAL, "A pending request %s:%s\n", dst, req->name);
871 ret = send_msg(dst, req, MP_REQ);
873 RTE_LOG(ERR, EAL, "Fail to send request %s:%s\n",
879 TAILQ_INSERT_TAIL(&pending_requests.requests, &pending_req, next);
884 ret = pthread_cond_timedwait(&pending_req.sync.cond,
885 &pending_requests.lock, ts);
886 } while (ret != 0 && ret != ETIMEDOUT);
888 TAILQ_REMOVE(&pending_requests.requests, &pending_req, next);
890 if (pending_req.reply_received == 0) {
891 RTE_LOG(ERR, EAL, "Fail to recv reply for request %s:%s\n",
893 rte_errno = ETIMEDOUT;
896 if (pending_req.reply_received == -1) {
897 RTE_LOG(DEBUG, EAL, "Asked to ignore response\n");
898 /* not receiving this message is not an error, so decrement
899 * number of sent messages
905 tmp = realloc(reply->msgs, sizeof(msg) * (reply->nb_received + 1));
907 RTE_LOG(ERR, EAL, "Fail to alloc reply for request %s:%s\n",
912 memcpy(&tmp[reply->nb_received], &msg, sizeof(msg));
914 reply->nb_received++;
918 int __rte_experimental
919 rte_mp_request_sync(struct rte_mp_msg *req, struct rte_mp_reply *reply,
920 const struct timespec *ts)
928 RTE_LOG(DEBUG, EAL, "request: %s\n", req->name);
930 if (check_input(req) == false)
934 reply->nb_received = 0;
937 if (internal_config.no_shconf) {
938 RTE_LOG(DEBUG, EAL, "No shared files mode enabled, IPC is disabled\n");
942 if (gettimeofday(&now, NULL) < 0) {
943 RTE_LOG(ERR, EAL, "Failed to get current time\n");
948 end.tv_nsec = (now.tv_usec * 1000 + ts->tv_nsec) % 1000000000;
949 end.tv_sec = now.tv_sec + ts->tv_sec +
950 (now.tv_usec * 1000 + ts->tv_nsec) / 1000000000;
952 /* for secondary process, send request to the primary process only */
953 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
954 pthread_mutex_lock(&pending_requests.lock);
955 ret = mp_request_sync(eal_mp_socket_path(), req, reply, &end);
956 pthread_mutex_unlock(&pending_requests.lock);
960 /* for primary process, broadcast request, and collect reply 1 by 1 */
961 mp_dir = opendir(mp_dir_path);
963 RTE_LOG(ERR, EAL, "Unable to open directory %s\n", mp_dir_path);
968 dir_fd = dirfd(mp_dir);
969 /* lock the directory to prevent processes spinning up while we send */
970 if (flock(dir_fd, LOCK_SH)) {
971 RTE_LOG(ERR, EAL, "Unable to lock directory %s\n",
978 pthread_mutex_lock(&pending_requests.lock);
979 while ((ent = readdir(mp_dir))) {
982 if (fnmatch(mp_filter, ent->d_name, 0) != 0)
985 snprintf(path, sizeof(path), "%s/%s", mp_dir_path,
988 /* unlocks the mutex while waiting for response,
991 if (mp_request_sync(path, req, reply, &end))
994 pthread_mutex_unlock(&pending_requests.lock);
995 /* unlock the directory */
996 flock(dir_fd, LOCK_UN);
998 /* dir_fd automatically closed on closedir */
1003 int __rte_experimental
1004 rte_mp_request_async(struct rte_mp_msg *req, const struct timespec *ts,
1005 rte_mp_async_reply_t clb)
1007 struct rte_mp_msg *copy;
1008 struct pending_request *dummy;
1009 struct async_request_param *param;
1010 struct rte_mp_reply *reply;
1011 int dir_fd, ret = 0;
1015 struct timespec *end;
1016 bool dummy_used = false;
1018 RTE_LOG(DEBUG, EAL, "request: %s\n", req->name);
1020 if (check_input(req) == false)
1023 if (internal_config.no_shconf) {
1024 RTE_LOG(DEBUG, EAL, "No shared files mode enabled, IPC is disabled\n");
1028 if (gettimeofday(&now, NULL) < 0) {
1029 RTE_LOG(ERR, EAL, "Faile to get current time\n");
1033 copy = calloc(1, sizeof(*copy));
1034 dummy = calloc(1, sizeof(*dummy));
1035 param = calloc(1, sizeof(*param));
1036 if (copy == NULL || dummy == NULL || param == NULL) {
1037 RTE_LOG(ERR, EAL, "Failed to allocate memory for async reply\n");
1043 memcpy(copy, req, sizeof(*copy));
1045 param->n_responses_processed = 0;
1048 reply = ¶m->user_reply;
1050 end->tv_nsec = (now.tv_usec * 1000 + ts->tv_nsec) % 1000000000;
1051 end->tv_sec = now.tv_sec + ts->tv_sec +
1052 (now.tv_usec * 1000 + ts->tv_nsec) / 1000000000;
1054 reply->nb_received = 0;
1057 /* we have to lock the request queue here, as we will be adding a bunch
1058 * of requests to the queue at once, and some of the replies may arrive
1059 * before we add all of the requests to the queue.
1061 pthread_mutex_lock(&pending_requests.lock);
1063 /* we have to ensure that callback gets triggered even if we don't send
1064 * anything, therefore earlier we have allocated a dummy request. fill
1065 * it, and put it on the queue if we don't send any requests.
1067 dummy->type = REQUEST_TYPE_ASYNC;
1068 dummy->request = copy;
1069 dummy->reply = NULL;
1070 dummy->async.param = param;
1071 dummy->reply_received = 1; /* short-circuit the timeout */
1073 /* for secondary process, send request to the primary process only */
1074 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1075 ret = mp_request_async(eal_mp_socket_path(), copy, param, ts);
1077 /* if we didn't send anything, put dummy request on the queue */
1078 if (ret == 0 && reply->nb_sent == 0) {
1079 TAILQ_INSERT_TAIL(&pending_requests.requests, dummy,
1084 pthread_mutex_unlock(&pending_requests.lock);
1086 /* if we couldn't send anything, clean up */
1092 /* for primary process, broadcast request */
1093 mp_dir = opendir(mp_dir_path);
1095 RTE_LOG(ERR, EAL, "Unable to open directory %s\n", mp_dir_path);
1099 dir_fd = dirfd(mp_dir);
1101 /* lock the directory to prevent processes spinning up while we send */
1102 if (flock(dir_fd, LOCK_SH)) {
1103 RTE_LOG(ERR, EAL, "Unable to lock directory %s\n",
1109 while ((ent = readdir(mp_dir))) {
1110 char path[PATH_MAX];
1112 if (fnmatch(mp_filter, ent->d_name, 0) != 0)
1115 snprintf(path, sizeof(path), "%s/%s", mp_dir_path,
1118 if (mp_request_async(path, copy, param, ts))
1121 /* if we didn't send anything, put dummy request on the queue */
1122 if (ret == 0 && reply->nb_sent == 0) {
1123 TAILQ_INSERT_HEAD(&pending_requests.requests, dummy, next);
1127 /* finally, unlock the queue */
1128 pthread_mutex_unlock(&pending_requests.lock);
1130 /* unlock the directory */
1131 flock(dir_fd, LOCK_UN);
1133 /* dir_fd automatically closed on closedir */
1136 /* if dummy was unused, free it */
1144 pthread_mutex_unlock(&pending_requests.lock);
1152 int __rte_experimental
1153 rte_mp_reply(struct rte_mp_msg *msg, const char *peer)
1155 RTE_LOG(DEBUG, EAL, "reply: %s\n", msg->name);
1157 if (check_input(msg) == false)
1161 RTE_LOG(ERR, EAL, "peer is not specified\n");
1166 if (internal_config.no_shconf) {
1167 RTE_LOG(DEBUG, EAL, "No shared files mode enabled, IPC is disabled\n");
1171 return mp_send(msg, peer, MP_REP);