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) {
201 rte_mp_action_register(const char *name, rte_mp_t action)
203 struct action_entry *entry;
205 if (validate_action_name(name) != 0)
208 if (internal_config.no_shconf) {
209 RTE_LOG(DEBUG, EAL, "No shared files mode enabled, IPC is disabled\n");
214 entry = malloc(sizeof(struct action_entry));
219 strlcpy(entry->action_name, name, sizeof(entry->action_name));
220 entry->action = action;
222 pthread_mutex_lock(&mp_mutex_action);
223 if (find_action_entry_by_name(name) != NULL) {
224 pthread_mutex_unlock(&mp_mutex_action);
229 TAILQ_INSERT_TAIL(&action_entry_list, entry, next);
230 pthread_mutex_unlock(&mp_mutex_action);
235 rte_mp_action_unregister(const char *name)
237 struct action_entry *entry;
239 if (validate_action_name(name) != 0)
242 if (internal_config.no_shconf) {
243 RTE_LOG(DEBUG, EAL, "No shared files mode enabled, IPC is disabled\n");
247 pthread_mutex_lock(&mp_mutex_action);
248 entry = find_action_entry_by_name(name);
250 pthread_mutex_unlock(&mp_mutex_action);
253 TAILQ_REMOVE(&action_entry_list, entry, next);
254 pthread_mutex_unlock(&mp_mutex_action);
259 read_msg(struct mp_msg_internal *m, struct sockaddr_un *s)
264 char control[CMSG_SPACE(sizeof(m->msg.fds))];
265 struct cmsghdr *cmsg;
266 int buflen = sizeof(*m) - sizeof(m->msg.fds);
268 memset(&msgh, 0, sizeof(msgh));
270 iov.iov_len = buflen;
273 msgh.msg_namelen = sizeof(*s);
276 msgh.msg_control = control;
277 msgh.msg_controllen = sizeof(control);
279 msglen = recvmsg(mp_fd, &msgh, 0);
281 RTE_LOG(ERR, EAL, "recvmsg failed, %s\n", strerror(errno));
285 if (msglen != buflen || (msgh.msg_flags & (MSG_TRUNC | MSG_CTRUNC))) {
286 RTE_LOG(ERR, EAL, "truncated msg\n");
290 /* read auxiliary FDs if any */
291 for (cmsg = CMSG_FIRSTHDR(&msgh); cmsg != NULL;
292 cmsg = CMSG_NXTHDR(&msgh, cmsg)) {
293 if ((cmsg->cmsg_level == SOL_SOCKET) &&
294 (cmsg->cmsg_type == SCM_RIGHTS)) {
295 memcpy(m->msg.fds, CMSG_DATA(cmsg), sizeof(m->msg.fds));
299 /* sanity-check the response */
300 if (m->msg.num_fds < 0 || m->msg.num_fds > RTE_MP_MAX_FD_NUM) {
301 RTE_LOG(ERR, EAL, "invalid number of fd's received\n");
304 if (m->msg.len_param < 0 || m->msg.len_param > RTE_MP_MAX_PARAM_LEN) {
305 RTE_LOG(ERR, EAL, "invalid received data length\n");
312 process_msg(struct mp_msg_internal *m, struct sockaddr_un *s)
314 struct pending_request *pending_req;
315 struct action_entry *entry;
316 struct rte_mp_msg *msg = &m->msg;
317 rte_mp_t action = NULL;
319 RTE_LOG(DEBUG, EAL, "msg: %s\n", msg->name);
321 if (m->type == MP_REP || m->type == MP_IGN) {
322 struct pending_request *req = NULL;
324 pthread_mutex_lock(&pending_requests.lock);
325 pending_req = find_pending_request(s->sun_path, msg->name);
327 memcpy(pending_req->reply, msg, sizeof(*msg));
328 /* -1 indicates that we've been asked to ignore */
329 pending_req->reply_received =
330 m->type == MP_REP ? 1 : -1;
332 if (pending_req->type == REQUEST_TYPE_SYNC)
333 pthread_cond_signal(&pending_req->sync.cond);
334 else if (pending_req->type == REQUEST_TYPE_ASYNC)
335 req = async_reply_handle_thread_unsafe(
338 RTE_LOG(ERR, EAL, "Drop mp reply: %s\n", msg->name);
339 pthread_mutex_unlock(&pending_requests.lock);
342 trigger_async_action(req);
346 pthread_mutex_lock(&mp_mutex_action);
347 entry = find_action_entry_by_name(msg->name);
349 action = entry->action;
350 pthread_mutex_unlock(&mp_mutex_action);
353 if (m->type == MP_REQ && !internal_config.init_complete) {
354 /* if this is a request, and init is not yet complete,
355 * and callback wasn't registered, we should tell the
356 * requester to ignore our existence because we're not
357 * yet ready to process this request.
359 struct rte_mp_msg dummy;
361 memset(&dummy, 0, sizeof(dummy));
362 strlcpy(dummy.name, msg->name, sizeof(dummy.name));
363 mp_send(&dummy, s->sun_path, MP_IGN);
365 RTE_LOG(ERR, EAL, "Cannot find action: %s\n",
368 } else if (action(msg, s->sun_path) < 0) {
369 RTE_LOG(ERR, EAL, "Fail to handle message: %s\n", msg->name);
374 mp_handle(void *arg __rte_unused)
376 struct mp_msg_internal msg;
377 struct sockaddr_un sa;
380 if (read_msg(&msg, &sa) == 0)
381 process_msg(&msg, &sa);
388 timespec_cmp(const struct timespec *a, const struct timespec *b)
390 if (a->tv_sec < b->tv_sec)
392 if (a->tv_sec > b->tv_sec)
394 if (a->tv_nsec < b->tv_nsec)
396 if (a->tv_nsec > b->tv_nsec)
402 ACTION_FREE, /**< free the action entry, but don't trigger callback */
403 ACTION_TRIGGER /**< trigger callback, then free action entry */
406 static enum async_action
407 process_async_request(struct pending_request *sr, const struct timespec *now)
409 struct async_request_param *param;
410 struct rte_mp_reply *reply;
411 bool timeout, last_msg;
413 param = sr->async.param;
414 reply = ¶m->user_reply;
416 /* did we timeout? */
417 timeout = timespec_cmp(¶m->end, now) <= 0;
419 /* if we received a response, adjust relevant data and copy mesasge. */
420 if (sr->reply_received == 1 && sr->reply) {
421 struct rte_mp_msg *msg, *user_msgs, *tmp;
424 user_msgs = reply->msgs;
426 tmp = realloc(user_msgs, sizeof(*msg) *
427 (reply->nb_received + 1));
429 RTE_LOG(ERR, EAL, "Fail to alloc reply for request %s:%s\n",
430 sr->dst, sr->request->name);
431 /* this entry is going to be removed and its message
432 * dropped, but we don't want to leak memory, so
437 reply->msgs = user_msgs;
438 memcpy(&user_msgs[reply->nb_received],
440 reply->nb_received++;
443 /* mark this request as processed */
444 param->n_responses_processed++;
445 } else if (sr->reply_received == -1) {
446 /* we were asked to ignore this process */
448 } else if (timeout) {
449 /* count it as processed response, but don't increment
452 param->n_responses_processed++;
457 last_msg = param->n_responses_processed == reply->nb_sent;
459 return last_msg ? ACTION_TRIGGER : ACTION_FREE;
463 trigger_async_action(struct pending_request *sr)
465 struct async_request_param *param;
466 struct rte_mp_reply *reply;
468 param = sr->async.param;
469 reply = ¶m->user_reply;
471 param->clb(sr->request, reply);
474 free(sr->async.param->user_reply.msgs);
475 free(sr->async.param);
480 static struct pending_request *
481 async_reply_handle_thread_unsafe(void *arg)
483 struct pending_request *req = (struct pending_request *)arg;
484 enum async_action action;
485 struct timespec ts_now;
488 if (gettimeofday(&now, NULL) < 0) {
489 RTE_LOG(ERR, EAL, "Cannot get current time\n");
492 ts_now.tv_nsec = now.tv_usec * 1000;
493 ts_now.tv_sec = now.tv_sec;
495 action = process_async_request(req, &ts_now);
497 TAILQ_REMOVE(&pending_requests.requests, req, next);
499 if (rte_eal_alarm_cancel(async_reply_handle, req) < 0) {
500 /* if we failed to cancel the alarm because it's already in
501 * progress, don't proceed because otherwise we will end up
502 * handling the same message twice.
504 if (rte_errno == EINPROGRESS) {
505 RTE_LOG(DEBUG, EAL, "Request handling is already in progress\n");
508 RTE_LOG(ERR, EAL, "Failed to cancel alarm\n");
511 if (action == ACTION_TRIGGER)
519 async_reply_handle(void *arg)
521 struct pending_request *req;
523 pthread_mutex_lock(&pending_requests.lock);
524 req = async_reply_handle_thread_unsafe(arg);
525 pthread_mutex_unlock(&pending_requests.lock);
528 trigger_async_action(req);
534 struct sockaddr_un un;
537 if (rte_eal_process_type() == RTE_PROC_SECONDARY)
538 snprintf(peer_name, sizeof(peer_name),
539 "%d_%"PRIx64, getpid(), rte_rdtsc());
541 mp_fd = socket(AF_UNIX, SOCK_DGRAM, 0);
543 RTE_LOG(ERR, EAL, "failed to create unix socket\n");
547 memset(&un, 0, sizeof(un));
548 un.sun_family = AF_UNIX;
550 create_socket_path(peer_name, un.sun_path, sizeof(un.sun_path));
552 unlink(un.sun_path); /* May still exist since last run */
554 if (bind(mp_fd, (struct sockaddr *)&un, sizeof(un)) < 0) {
555 RTE_LOG(ERR, EAL, "failed to bind %s: %s\n",
556 un.sun_path, strerror(errno));
561 RTE_LOG(INFO, EAL, "Multi-process socket %s\n", un.sun_path);
566 close_socket_fd(void)
574 create_socket_path(peer_name, path, sizeof(path));
579 rte_mp_channel_init(void)
583 pthread_t mp_handle_tid;
585 /* in no shared files mode, we do not have secondary processes support,
586 * so no need to initialize IPC.
588 if (internal_config.no_shconf) {
589 RTE_LOG(DEBUG, EAL, "No shared files mode enabled, IPC will be disabled\n");
594 /* create filter path */
595 create_socket_path("*", path, sizeof(path));
596 strlcpy(mp_filter, basename(path), sizeof(mp_filter));
598 /* path may have been modified, so recreate it */
599 create_socket_path("*", path, sizeof(path));
600 strlcpy(mp_dir_path, dirname(path), sizeof(mp_dir_path));
602 /* lock the directory */
603 dir_fd = open(mp_dir_path, O_RDONLY);
605 RTE_LOG(ERR, EAL, "failed to open %s: %s\n",
606 mp_dir_path, strerror(errno));
610 if (flock(dir_fd, LOCK_EX)) {
611 RTE_LOG(ERR, EAL, "failed to lock %s: %s\n",
612 mp_dir_path, strerror(errno));
617 if (open_socket_fd() < 0) {
622 if (rte_ctrl_thread_create(&mp_handle_tid, "rte_mp_handle",
623 NULL, mp_handle, NULL) < 0) {
624 RTE_LOG(ERR, EAL, "failed to create mp thead: %s\n",
632 /* unlock the directory */
633 flock(dir_fd, LOCK_UN);
640 rte_mp_channel_cleanup(void)
646 * Return -1, as fail to send message and it's caused by the local side.
647 * Return 0, as fail to send message and it's caused by the remote side.
648 * Return 1, as succeed to send message.
652 send_msg(const char *dst_path, struct rte_mp_msg *msg, int type)
657 struct cmsghdr *cmsg;
658 struct sockaddr_un dst;
659 struct mp_msg_internal m;
660 int fd_size = msg->num_fds * sizeof(int);
661 char control[CMSG_SPACE(fd_size)];
664 memcpy(&m.msg, msg, sizeof(*msg));
666 memset(&dst, 0, sizeof(dst));
667 dst.sun_family = AF_UNIX;
668 strlcpy(dst.sun_path, dst_path, sizeof(dst.sun_path));
670 memset(&msgh, 0, sizeof(msgh));
671 memset(control, 0, sizeof(control));
674 iov.iov_len = sizeof(m) - sizeof(msg->fds);
676 msgh.msg_name = &dst;
677 msgh.msg_namelen = sizeof(dst);
680 msgh.msg_control = control;
681 msgh.msg_controllen = sizeof(control);
683 cmsg = CMSG_FIRSTHDR(&msgh);
684 cmsg->cmsg_len = CMSG_LEN(fd_size);
685 cmsg->cmsg_level = SOL_SOCKET;
686 cmsg->cmsg_type = SCM_RIGHTS;
687 memcpy(CMSG_DATA(cmsg), msg->fds, fd_size);
690 snd = sendmsg(mp_fd, &msgh, 0);
691 } while (snd < 0 && errno == EINTR);
695 /* Check if it caused by peer process exits */
696 if (errno == ECONNREFUSED &&
697 rte_eal_process_type() == RTE_PROC_PRIMARY) {
701 RTE_LOG(ERR, EAL, "failed to send to (%s) due to %s\n",
702 dst_path, strerror(errno));
710 mp_send(struct rte_mp_msg *msg, const char *peer, int type)
716 if (!peer && (rte_eal_process_type() == RTE_PROC_SECONDARY))
717 peer = eal_mp_socket_path();
720 if (send_msg(peer, msg, type) < 0)
726 /* broadcast to all secondary processes */
727 mp_dir = opendir(mp_dir_path);
729 RTE_LOG(ERR, EAL, "Unable to open directory %s\n",
735 dir_fd = dirfd(mp_dir);
736 /* lock the directory to prevent processes spinning up while we send */
737 if (flock(dir_fd, LOCK_SH)) {
738 RTE_LOG(ERR, EAL, "Unable to lock directory %s\n",
745 while ((ent = readdir(mp_dir))) {
748 if (fnmatch(mp_filter, ent->d_name, 0) != 0)
751 snprintf(path, sizeof(path), "%s/%s", mp_dir_path,
753 if (send_msg(path, msg, type) < 0)
757 flock(dir_fd, LOCK_UN);
759 /* dir_fd automatically closed on closedir */
765 check_input(const struct rte_mp_msg *msg)
768 RTE_LOG(ERR, EAL, "Msg cannot be NULL\n");
773 if (validate_action_name(msg->name) != 0)
776 if (msg->len_param < 0) {
777 RTE_LOG(ERR, EAL, "Message data length is negative\n");
782 if (msg->num_fds < 0) {
783 RTE_LOG(ERR, EAL, "Number of fd's is negative\n");
788 if (msg->len_param > RTE_MP_MAX_PARAM_LEN) {
789 RTE_LOG(ERR, EAL, "Message data is too long\n");
794 if (msg->num_fds > RTE_MP_MAX_FD_NUM) {
795 RTE_LOG(ERR, EAL, "Cannot send more than %d FDs\n",
805 rte_mp_sendmsg(struct rte_mp_msg *msg)
807 if (check_input(msg) != 0)
810 if (internal_config.no_shconf) {
811 RTE_LOG(DEBUG, EAL, "No shared files mode enabled, IPC is disabled\n");
816 RTE_LOG(DEBUG, EAL, "sendmsg: %s\n", msg->name);
817 return mp_send(msg, NULL, MP_MSG);
821 mp_request_async(const char *dst, struct rte_mp_msg *req,
822 struct async_request_param *param, const struct timespec *ts)
824 struct rte_mp_msg *reply_msg;
825 struct pending_request *pending_req, *exist;
828 pending_req = calloc(1, sizeof(*pending_req));
829 reply_msg = calloc(1, sizeof(*reply_msg));
830 if (pending_req == NULL || reply_msg == NULL) {
831 RTE_LOG(ERR, EAL, "Could not allocate space for sync request\n");
837 pending_req->type = REQUEST_TYPE_ASYNC;
838 strlcpy(pending_req->dst, dst, sizeof(pending_req->dst));
839 pending_req->request = req;
840 pending_req->reply = reply_msg;
841 pending_req->async.param = param;
843 /* queue already locked by caller */
845 exist = find_pending_request(dst, req->name);
847 RTE_LOG(ERR, EAL, "A pending request %s:%s\n", dst, req->name);
853 ret = send_msg(dst, req, MP_REQ);
855 RTE_LOG(ERR, EAL, "Fail to send request %s:%s\n",
859 } else if (ret == 0) {
863 param->user_reply.nb_sent++;
865 /* if alarm set fails, we simply ignore the reply */
866 if (rte_eal_alarm_set(ts->tv_sec * 1000000 + ts->tv_nsec / 1000,
867 async_reply_handle, pending_req) < 0) {
868 RTE_LOG(ERR, EAL, "Fail to set alarm for request %s:%s\n",
873 TAILQ_INSERT_TAIL(&pending_requests.requests, pending_req, next);
883 mp_request_sync(const char *dst, struct rte_mp_msg *req,
884 struct rte_mp_reply *reply, const struct timespec *ts)
887 struct rte_mp_msg msg, *tmp;
888 struct pending_request pending_req, *exist;
890 pending_req.type = REQUEST_TYPE_SYNC;
891 pending_req.reply_received = 0;
892 strlcpy(pending_req.dst, dst, sizeof(pending_req.dst));
893 pending_req.request = req;
894 pending_req.reply = &msg;
895 pthread_cond_init(&pending_req.sync.cond, NULL);
897 exist = find_pending_request(dst, req->name);
899 RTE_LOG(ERR, EAL, "A pending request %s:%s\n", dst, req->name);
904 ret = send_msg(dst, req, MP_REQ);
906 RTE_LOG(ERR, EAL, "Fail to send request %s:%s\n",
912 TAILQ_INSERT_TAIL(&pending_requests.requests, &pending_req, next);
917 ret = pthread_cond_timedwait(&pending_req.sync.cond,
918 &pending_requests.lock, ts);
919 } while (ret != 0 && ret != ETIMEDOUT);
921 TAILQ_REMOVE(&pending_requests.requests, &pending_req, next);
923 if (pending_req.reply_received == 0) {
924 RTE_LOG(ERR, EAL, "Fail to recv reply for request %s:%s\n",
926 rte_errno = ETIMEDOUT;
929 if (pending_req.reply_received == -1) {
930 RTE_LOG(DEBUG, EAL, "Asked to ignore response\n");
931 /* not receiving this message is not an error, so decrement
932 * number of sent messages
938 tmp = realloc(reply->msgs, sizeof(msg) * (reply->nb_received + 1));
940 RTE_LOG(ERR, EAL, "Fail to alloc reply for request %s:%s\n",
945 memcpy(&tmp[reply->nb_received], &msg, sizeof(msg));
947 reply->nb_received++;
952 rte_mp_request_sync(struct rte_mp_msg *req, struct rte_mp_reply *reply,
953 const struct timespec *ts)
955 int dir_fd, ret = -1;
961 RTE_LOG(DEBUG, EAL, "request: %s\n", req->name);
964 reply->nb_received = 0;
967 if (check_input(req) != 0)
970 if (internal_config.no_shconf) {
971 RTE_LOG(DEBUG, EAL, "No shared files mode enabled, IPC is disabled\n");
976 if (gettimeofday(&now, NULL) < 0) {
977 RTE_LOG(ERR, EAL, "Failed to get current time\n");
982 end.tv_nsec = (now.tv_usec * 1000 + ts->tv_nsec) % 1000000000;
983 end.tv_sec = now.tv_sec + ts->tv_sec +
984 (now.tv_usec * 1000 + ts->tv_nsec) / 1000000000;
986 /* for secondary process, send request to the primary process only */
987 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
988 pthread_mutex_lock(&pending_requests.lock);
989 ret = mp_request_sync(eal_mp_socket_path(), req, reply, &end);
990 pthread_mutex_unlock(&pending_requests.lock);
994 /* for primary process, broadcast request, and collect reply 1 by 1 */
995 mp_dir = opendir(mp_dir_path);
997 RTE_LOG(ERR, EAL, "Unable to open directory %s\n", mp_dir_path);
1002 dir_fd = dirfd(mp_dir);
1003 /* lock the directory to prevent processes spinning up while we send */
1004 if (flock(dir_fd, LOCK_SH)) {
1005 RTE_LOG(ERR, EAL, "Unable to lock directory %s\n",
1011 pthread_mutex_lock(&pending_requests.lock);
1012 while ((ent = readdir(mp_dir))) {
1013 char path[PATH_MAX];
1015 if (fnmatch(mp_filter, ent->d_name, 0) != 0)
1018 snprintf(path, sizeof(path), "%s/%s", mp_dir_path,
1021 /* unlocks the mutex while waiting for response,
1024 if (mp_request_sync(path, req, reply, &end))
1030 pthread_mutex_unlock(&pending_requests.lock);
1031 /* unlock the directory */
1032 flock(dir_fd, LOCK_UN);
1035 /* dir_fd automatically closed on closedir */
1041 reply->nb_received = 0;
1048 rte_mp_request_async(struct rte_mp_msg *req, const struct timespec *ts,
1049 rte_mp_async_reply_t clb)
1051 struct rte_mp_msg *copy;
1052 struct pending_request *dummy;
1053 struct async_request_param *param;
1054 struct rte_mp_reply *reply;
1055 int dir_fd, ret = 0;
1059 struct timespec *end;
1060 bool dummy_used = false;
1062 RTE_LOG(DEBUG, EAL, "request: %s\n", req->name);
1064 if (check_input(req) != 0)
1067 if (internal_config.no_shconf) {
1068 RTE_LOG(DEBUG, EAL, "No shared files mode enabled, IPC is disabled\n");
1069 rte_errno = ENOTSUP;
1073 if (gettimeofday(&now, NULL) < 0) {
1074 RTE_LOG(ERR, EAL, "Failed to get current time\n");
1078 copy = calloc(1, sizeof(*copy));
1079 dummy = calloc(1, sizeof(*dummy));
1080 param = calloc(1, sizeof(*param));
1081 if (copy == NULL || dummy == NULL || param == NULL) {
1082 RTE_LOG(ERR, EAL, "Failed to allocate memory for async reply\n");
1088 memcpy(copy, req, sizeof(*copy));
1090 param->n_responses_processed = 0;
1093 reply = ¶m->user_reply;
1095 end->tv_nsec = (now.tv_usec * 1000 + ts->tv_nsec) % 1000000000;
1096 end->tv_sec = now.tv_sec + ts->tv_sec +
1097 (now.tv_usec * 1000 + ts->tv_nsec) / 1000000000;
1099 reply->nb_received = 0;
1102 /* we have to lock the request queue here, as we will be adding a bunch
1103 * of requests to the queue at once, and some of the replies may arrive
1104 * before we add all of the requests to the queue.
1106 pthread_mutex_lock(&pending_requests.lock);
1108 /* we have to ensure that callback gets triggered even if we don't send
1109 * anything, therefore earlier we have allocated a dummy request. fill
1110 * it, and put it on the queue if we don't send any requests.
1112 dummy->type = REQUEST_TYPE_ASYNC;
1113 dummy->request = copy;
1114 dummy->reply = NULL;
1115 dummy->async.param = param;
1116 dummy->reply_received = 1; /* short-circuit the timeout */
1118 /* for secondary process, send request to the primary process only */
1119 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1120 ret = mp_request_async(eal_mp_socket_path(), copy, param, ts);
1122 /* if we didn't send anything, put dummy request on the queue */
1123 if (ret == 0 && reply->nb_sent == 0) {
1124 TAILQ_INSERT_TAIL(&pending_requests.requests, dummy,
1129 pthread_mutex_unlock(&pending_requests.lock);
1131 /* if we couldn't send anything, clean up */
1137 /* for primary process, broadcast request */
1138 mp_dir = opendir(mp_dir_path);
1140 RTE_LOG(ERR, EAL, "Unable to open directory %s\n", mp_dir_path);
1144 dir_fd = dirfd(mp_dir);
1146 /* lock the directory to prevent processes spinning up while we send */
1147 if (flock(dir_fd, LOCK_SH)) {
1148 RTE_LOG(ERR, EAL, "Unable to lock directory %s\n",
1154 while ((ent = readdir(mp_dir))) {
1155 char path[PATH_MAX];
1157 if (fnmatch(mp_filter, ent->d_name, 0) != 0)
1160 snprintf(path, sizeof(path), "%s/%s", mp_dir_path,
1163 if (mp_request_async(path, copy, param, ts))
1166 /* if we didn't send anything, put dummy request on the queue */
1167 if (ret == 0 && reply->nb_sent == 0) {
1168 TAILQ_INSERT_HEAD(&pending_requests.requests, dummy, next);
1172 /* finally, unlock the queue */
1173 pthread_mutex_unlock(&pending_requests.lock);
1175 /* unlock the directory */
1176 flock(dir_fd, LOCK_UN);
1178 /* dir_fd automatically closed on closedir */
1181 /* if dummy was unused, free it */
1189 pthread_mutex_unlock(&pending_requests.lock);
1198 rte_mp_reply(struct rte_mp_msg *msg, const char *peer)
1200 RTE_LOG(DEBUG, EAL, "reply: %s\n", msg->name);
1202 if (check_input(msg) != 0)
1206 RTE_LOG(ERR, EAL, "peer is not specified\n");
1211 if (internal_config.no_shconf) {
1212 RTE_LOG(DEBUG, EAL, "No shared files mode enabled, IPC is disabled\n");
1216 return mp_send(msg, peer, MP_REP);