X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fust-consumer.c;h=b9865a0f015b76e0abb5ebcedfd8b92238b47465;hp=78f29f497b7f69fb127bb24f78d7ce1a6f769654;hb=cb7d882ca6edad2f4f36e585aca3cc05f1d8048e;hpb=9363801e2d2069022a05e67066d8f527538946d0 diff --git a/src/bin/lttng-sessiond/ust-consumer.c b/src/bin/lttng-sessiond/ust-consumer.c index 78f29f497..b9865a0f0 100644 --- a/src/bin/lttng-sessiond/ust-consumer.c +++ b/src/bin/lttng-sessiond/ust-consumer.c @@ -15,7 +15,7 @@ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#define _GNU_SOURCE +#define _LGPL_SOURCE #include #include #include @@ -24,14 +24,15 @@ #include #include -#include +#include #include #include "consumer.h" -#include "health.h" +#include "health-sessiond.h" #include "ust-consumer.h" #include "buffer-registry.h" #include "session.h" +#include "lttng-sessiond.h" /* * Return allocated full pathname of the session using the consumer trace path @@ -52,8 +53,11 @@ static char *setup_trace_path(struct consumer_output *consumer, health_code_update(); - /* Allocate our self the string to make sure we never exceed PATH_MAX. */ - pathname = zmalloc(PATH_MAX); + /* + * Allocate the string ourself to make sure we never exceed + * LTTNG_PATH_MAX. + */ + pathname = zmalloc(LTTNG_PATH_MAX); if (!pathname) { goto error; } @@ -61,8 +65,10 @@ static char *setup_trace_path(struct consumer_output *consumer, /* Get correct path name destination */ if (consumer->type == CONSUMER_DST_LOCAL) { /* Set application path to the destination path */ - ret = snprintf(pathname, PATH_MAX, "%s%s%s", - consumer->dst.trace_path, consumer->subdir, ua_sess->path); + ret = snprintf(pathname, LTTNG_PATH_MAX, "%s%s%s%s", + consumer->dst.session_root_path, + consumer->chunk_path, + consumer->subdir, ua_sess->path); if (ret < 0) { PERROR("snprintf channel path"); goto error; @@ -72,13 +78,16 @@ static char *setup_trace_path(struct consumer_output *consumer, ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, ua_sess->euid, ua_sess->egid); if (ret < 0) { - if (ret != -EEXIST) { + if (errno != EEXIST) { ERR("Trace directory creation error"); goto error; } } } else { - ret = snprintf(pathname, PATH_MAX, "%s%s", consumer->subdir, + ret = snprintf(pathname, LTTNG_PATH_MAX, "%s%s%s%s", + consumer->dst.net.base_dir, + consumer->chunk_path, + consumer->subdir, ua_sess->path); if (ret < 0) { PERROR("snprintf channel path"); @@ -94,7 +103,7 @@ error: } /* - * Send a single channel to the consumer using command ADD_CHANNEL. + * Send a single channel to the consumer using command ASK_CHANNEL_CREATION. * * Consumer socket lock MUST be acquired before calling this. */ @@ -102,12 +111,14 @@ static int ask_channel_creation(struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan, struct consumer_output *consumer, struct consumer_socket *socket, struct ust_registry_session *registry) { - int ret; + int ret, output; uint32_t chan_id; uint64_t key, chan_reg_key; char *pathname = NULL; struct lttcomm_consumer_msg msg; struct ust_registry_channel *chan_reg; + char shm_path[PATH_MAX] = ""; + char root_shm_path[PATH_MAX] = ""; assert(ua_sess); assert(ua_chan); @@ -135,10 +146,34 @@ static int ask_channel_creation(struct ust_app_session *ua_sess, if (ua_chan->attr.type == LTTNG_UST_CHAN_METADATA) { chan_id = -1U; + /* + * Metadata channels shm_path (buffers) are handled within + * session daemon. Consumer daemon should not try to create + * those buffer files. + */ } else { chan_reg = ust_registry_channel_find(registry, chan_reg_key); assert(chan_reg); chan_id = chan_reg->chan_id; + if (ua_sess->shm_path[0]) { + strncpy(shm_path, ua_sess->shm_path, sizeof(shm_path)); + shm_path[sizeof(shm_path) - 1] = '\0'; + strncat(shm_path, "/", + sizeof(shm_path) - strlen(shm_path) - 1); + strncat(shm_path, ua_chan->name, + sizeof(shm_path) - strlen(shm_path) - 1); + strncat(shm_path, "_", + sizeof(shm_path) - strlen(shm_path) - 1); + } + strncpy(root_shm_path, ua_sess->root_shm_path, sizeof(root_shm_path)); + root_shm_path[sizeof(root_shm_path) - 1] = '\0'; + } + + switch (ua_chan->attr.output) { + case LTTNG_UST_MMAP: + default: + output = LTTNG_EVENT_MMAP; + break; } consumer_init_ask_channel_comm_msg(&msg, @@ -147,7 +182,9 @@ static int ask_channel_creation(struct ust_app_session *ua_sess, ua_chan->attr.overwrite, ua_chan->attr.switch_timer_interval, ua_chan->attr.read_timer_interval, - (int) ua_chan->attr.output, + ua_sess->live_timer_interval, + ua_chan->monitor_timer_interval, + output, (int) ua_chan->attr.type, ua_sess->tracing_id, pathname, @@ -162,7 +199,9 @@ static int ask_channel_creation(struct ust_app_session *ua_sess, ua_chan->tracefile_count, ua_sess->id, ua_sess->output_traces, - ua_sess->uid); + ua_sess->uid, + ua_chan->attr.blocking_timeout, + root_shm_path, shm_path); health_code_update(); @@ -195,6 +234,8 @@ error: /* * Ask consumer to create a channel for a given session. * + * Session list and rcu read side locks must be held by the caller. + * * Returns 0 on success else a negative value. */ int ust_consumer_ask_channel(struct ust_app_session *ua_sess, @@ -202,6 +243,7 @@ int ust_consumer_ask_channel(struct ust_app_session *ua_sess, struct consumer_socket *socket, struct ust_registry_session *registry) { int ret; + struct ltt_session *session; assert(ua_sess); assert(ua_chan); @@ -215,15 +257,18 @@ int ust_consumer_ask_channel(struct ust_app_session *ua_sess, goto error; } - pthread_mutex_lock(socket->lock); + session = session_find_by_id(ua_sess->tracing_id); + assert(session); + pthread_mutex_lock(socket->lock); ret = ask_channel_creation(ua_sess, ua_chan, consumer, socket, registry); + pthread_mutex_unlock(socket->lock); if (ret < 0) { + ERR("ask_channel_creation consumer command failed"); goto error; } error: - pthread_mutex_unlock(socket->lock); return ret; } @@ -242,6 +287,7 @@ int ust_consumer_get_channel(struct consumer_socket *socket, assert(ua_chan); assert(socket); + memset(&msg, 0, sizeof(msg)); msg.cmd_type = LTTNG_CONSUMER_GET_CHANNEL; msg.u.get_channel.key = ua_chan->key; @@ -283,7 +329,6 @@ int ust_consumer_get_channel(struct consumer_socket *socket, free(stream); if (ret == -LTTNG_UST_ERR_NOENT) { DBG3("UST app consumer has no more stream available"); - ret = 0; break; } if (ret != -EPIPE) { @@ -299,7 +344,7 @@ int ust_consumer_get_channel(struct consumer_socket *socket, cds_list_add_tail(&stream->list, &ua_chan->streams.head); ua_chan->streams.count++; - DBG2("UST app stream %d received succesfully", ua_chan->streams.count); + DBG2("UST app stream %d received successfully", ua_chan->streams.count); } /* This MUST match or else we have a synchronization problem. */ @@ -336,6 +381,7 @@ int ust_consumer_destroy_channel(struct consumer_socket *socket, assert(ua_chan); assert(socket); + memset(&msg, 0, sizeof(msg)); msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; msg.u.destroy_channel.key = ua_chan->key; @@ -370,11 +416,13 @@ int ust_consumer_send_stream_to_ust(struct ust_app *app, DBG2("UST consumer send stream to app %d", app->sock); /* Relay stream to application. */ + pthread_mutex_lock(&app->sock_lock); ret = ustctl_send_stream_to_ust(app->sock, channel->obj, stream->obj); + pthread_mutex_unlock(&app->sock_lock); if (ret < 0) { if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { - ERR("Error ustctl send stream %s to app pid: %d with ret %d", - stream->name, app->pid, ret); + ERR("ustctl send stream handle %d to app pid: %d with ret %d", + stream->obj->handle, app->pid, ret); } else { DBG3("UST app send stream to ust failed. Application is dead."); } @@ -405,7 +453,9 @@ int ust_consumer_send_channel_to_ust(struct ust_app *app, app->sock, app->pid, channel->name, channel->tracing_channel_id); /* Send stream to application. */ + pthread_mutex_lock(&app->sock_lock); ret = ustctl_send_channel_to_ust(app->sock, ua_sess->handle, channel->obj); + pthread_mutex_unlock(&app->sock_lock); if (ret < 0) { if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { ERR("Error ustctl send channel %s to app pid: %d with ret %d", @@ -437,12 +487,12 @@ int ust_consumer_metadata_request(struct consumer_socket *socket) assert(socket); rcu_read_lock(); - pthread_mutex_lock(socket->lock); - health_code_update(); /* Wait for a metadata request */ + pthread_mutex_lock(socket->lock); ret = consumer_socket_recv(socket, &request, sizeof(request)); + pthread_mutex_unlock(socket->lock); if (ret < 0) { goto end; } @@ -461,8 +511,11 @@ int ust_consumer_metadata_request(struct consumer_socket *socket) DBG("PID registry not found for session id %" PRIu64, request.session_id_per_pid); + memset(&msg, 0, sizeof(msg)); msg.cmd_type = LTTNG_ERR_UND; + pthread_mutex_lock(socket->lock); (void) consumer_send_msg(socket, &msg); + pthread_mutex_unlock(socket->lock); /* * This is possible since the session might have been destroyed * during a consumer metadata request. So here, return gracefully @@ -476,17 +529,21 @@ int ust_consumer_metadata_request(struct consumer_socket *socket) } assert(ust_reg); + pthread_mutex_lock(&ust_reg->lock); ret_push = ust_app_push_metadata(ust_reg, socket, 1); - if (ret_push < 0) { + pthread_mutex_unlock(&ust_reg->lock); + if (ret_push == -EPIPE) { + DBG("Application or relay closed while pushing metadata"); + } else if (ret_push < 0) { ERR("Pushing metadata"); ret = -1; goto end; + } else { + DBG("UST Consumer metadata pushed successfully"); } - DBG("UST Consumer metadata pushed successfully"); ret = 0; end: - pthread_mutex_unlock(socket->lock); rcu_read_unlock(); return ret; }