From 421cb6011479aad4a37260e2e496c353a89318c0 Mon Sep 17 00:00:00 2001 From: David Goulet Date: Tue, 8 Nov 2011 18:08:00 -0500 Subject: [PATCH] Cleanup ust-app.c and make it more modular Signed-off-by: David Goulet --- lttng-sessiond/main.c | 23 +- lttng-sessiond/ust-app.c | 907 +++++++++++++++++---------------------- lttng-sessiond/ust-app.h | 18 +- 3 files changed, 429 insertions(+), 519 deletions(-) diff --git a/lttng-sessiond/main.c b/lttng-sessiond/main.c index 40ad9add8..cc7885399 100644 --- a/lttng-sessiond/main.c +++ b/lttng-sessiond/main.c @@ -338,12 +338,6 @@ static void cleanup(void) DBG("Cleaning up"); - /* */ - MSG("%c[%d;%dm*** assert failed *** ==> %c[%dm%c[%d;%dm" - "Matthew, BEET driven development works!%c[%dm", - 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); - /* */ - if (is_root) { DBG("Removing %s directory", LTTNG_RUNDIR); ret = asprintf(&cmd, "rm -rf " LTTNG_RUNDIR); @@ -388,6 +382,12 @@ static void cleanup(void) close(thread_quit_pipe[0]); close(thread_quit_pipe[1]); + + /* */ + MSG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" + "Matthew, BEET driven development works!%c[%dm", + 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); + /* */ } /* @@ -720,7 +720,9 @@ static void update_ust_app(int app_sock) /* For all tracing session(s) */ cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { - ust_app_global_update(sess->ust_session, app_sock); + if (sess->ust_session) { + ust_app_global_update(sess->ust_session, app_sock); + } } } @@ -1983,7 +1985,8 @@ static int cmd_enable_channel(struct ltt_session *session, goto error; } - ret = ust_app_add_channel(usess, uchan); + /* Add channel to all registered applications */ + ret = ust_app_add_channel_all(usess, uchan); if (ret != LTTCOMM_OK) { goto error; } @@ -2243,7 +2246,7 @@ static int cmd_enable_event(struct ltt_session *session, int domain, } } - ret = ust_app_add_event(usess, uchan, uevent); + ret = ust_app_add_event_all(usess, uchan, uevent); if (ret < 0) { ret = LTTCOMM_UST_ENABLE_FAIL; goto error; @@ -2437,7 +2440,7 @@ static int cmd_start_trace(struct ltt_session *session) /* Flag session that trace should start automatically */ usess->start_trace = 1; - ret = ust_app_start_trace(usess); + ret = ust_app_start_trace_all(usess); if (ret < 0) { ret = LTTCOMM_UST_START_FAIL; goto error; diff --git a/lttng-sessiond/ust-app.c b/lttng-sessiond/ust-app.c index 72e3aeef2..d93dc90f5 100644 --- a/lttng-sessiond/ust-app.c +++ b/lttng-sessiond/ust-app.c @@ -46,6 +46,7 @@ static void delete_ust_app(struct ust_app *lta) rcu_read_lock(); + /* TODO: clean session hashtable */ free(lta->sessions); close(lta->key.sock); @@ -99,7 +100,8 @@ static void delete_ust_app_rcu(struct rcu_head *head) } /* - * Find an ust_app using the sock and return it. + * Find an ust_app using the sock and return it. RCU read side lock must be + * held before calling this helper function. */ static struct ust_app *find_app_by_sock(int sock) { @@ -107,8 +109,6 @@ static struct ust_app *find_app_by_sock(int sock) struct ust_app_key *key; struct cds_lfht_iter iter; - rcu_read_lock(); - node = hashtable_lookup(ust_app_sock_key_map, (void *)((unsigned long) sock), sizeof(void *), &iter); if (node == NULL) { @@ -126,7 +126,6 @@ static struct ust_app *find_app_by_sock(int sock) rcu_read_unlock(); goto error; } - rcu_read_unlock(); return caa_container_of(node, struct ust_app, node); @@ -224,15 +223,31 @@ int ust_app_register(struct ust_register_msg *msg, int sock) void ust_app_unregister(int sock) { struct ust_app *lta; + struct cds_lfht_node *node; + struct cds_lfht_iter iter; - DBG2("UST app unregistering sock %d", sock); - + rcu_read_lock(); lta = find_app_by_sock(sock); - if (lta) { - DBG("PID %d unregistering with sock %d", lta->key.pid, sock); - /* FIXME: Better use a call_rcu here ? */ - delete_ust_app(lta); + if (lta == NULL) { + ERR("Unregister app sock %d not found!", sock); + goto error; + } + + DBG("PID %d unregistering with sock %d", lta->key.pid, sock); + + /* Get the node reference for a call_rcu */ + node = hashtable_lookup(ust_app_ht, + (void *)((unsigned long) lta->key.pid), sizeof(void *), &iter); + if (node == NULL) { + ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); + goto error; } + + call_rcu(&node->head, delete_ust_app_rcu); + +error: + rcu_read_unlock(); + return; } /* @@ -286,21 +301,19 @@ void ust_app_ht_alloc(void) /* * Alloc new UST app session. */ -static struct ust_app_session *alloc_app_session(void) +static struct ust_app_session *alloc_ust_app_session(void) { struct ust_app_session *ua_sess; + /* Init most of the default value by allocating and zeroing */ ua_sess = zmalloc(sizeof(struct ust_app_session)); if (ua_sess == NULL) { PERROR("malloc"); goto error; } - ua_sess->enabled = 0; ua_sess->handle = -1; ua_sess->channels = hashtable_new_str(0); - ua_sess->metadata = NULL; - ua_sess->obj = NULL; return ua_sess; @@ -308,10 +321,14 @@ error: return NULL; } -static struct ust_app_channel *alloc_app_channel(char *name) +/* + * Alloc new UST app channel. + */ +static struct ust_app_channel *alloc_ust_app_channel(char *name) { struct ust_app_channel *ua_chan; + /* Init most of the default value by allocating and zeroing */ ua_chan = zmalloc(sizeof(struct ust_app_channel)); if (ua_chan == NULL) { PERROR("malloc"); @@ -320,9 +337,7 @@ static struct ust_app_channel *alloc_app_channel(char *name) strncpy(ua_chan->name, name, sizeof(ua_chan->name)); ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; - ua_chan->enabled = 0; ua_chan->handle = -1; - ua_chan->obj = NULL; ua_chan->ctx = hashtable_new(0); CDS_INIT_LIST_HEAD(&ua_chan->streams.head); ua_chan->events = hashtable_new_str(0); @@ -337,10 +352,14 @@ error: return NULL; } -static struct ust_app_event *alloc_app_event(char *name) +/* + * Alloc new UST app event. + */ +static struct ust_app_event *alloc_ust_app_event(char *name) { struct ust_app_event *ua_event; + /* Init most of the default value by allocating and zeroing */ ua_event = zmalloc(sizeof(struct ust_app_event)); if (ua_event == NULL) { PERROR("malloc"); @@ -361,7 +380,7 @@ error: return NULL; } -static void shallow_copy_event(struct ust_app_event *ua_event, +static void shadow_copy_event(struct ust_app_event *ua_event, struct ltt_ust_event *uevent) { strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); @@ -370,7 +389,7 @@ static void shallow_copy_event(struct ust_app_event *ua_event, /* TODO: support copy context */ } -static void shallow_copy_channel(struct ust_app_channel *ua_chan, +static void shadow_copy_channel(struct ust_app_channel *ua_chan, struct ltt_ust_channel *uchan) { struct cds_lfht_iter iter; @@ -378,13 +397,14 @@ static void shallow_copy_channel(struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent; struct ust_app_event *ua_event; - DBG2("Shallow copy of UST app channel %s", ua_chan->name); + DBG2("Shadow copy of UST app channel %s", ua_chan->name); strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; /* TODO: support copy context */ + /* Copy all events from ltt ust channel to ust app channel */ hashtable_get_first(uchan->events, &iter); while ((node = hashtable_iter_get_node(&iter)) != NULL) { uevent = caa_container_of(node, struct ltt_ust_event, node); @@ -392,27 +412,25 @@ static void shallow_copy_channel(struct ust_app_channel *ua_chan, ua_event_node = hashtable_lookup(ua_chan->events, (void *) uevent->attr.name, strlen(uevent->attr.name), &iter); if (ua_event_node == NULL) { - DBG2("UST event %s not found on shallow copy channel", + DBG2("UST event %s not found on shadow copy channel", uevent->attr.name); - ua_event = alloc_app_event(uevent->attr.name); + ua_event = alloc_ust_app_event(uevent->attr.name); if (ua_event == NULL) { - continue; + goto next; } + shadow_copy_event(ua_event, uevent); hashtable_add_unique(ua_chan->events, &ua_event->node); - } else { - ua_event = caa_container_of(node, struct ust_app_event, node); } - shallow_copy_event(ua_event, uevent); - +next: /* Get next UST events */ hashtable_get_next(uchan->events, &iter); } - DBG3("Shallow copy channel done"); + DBG3("Shadow copy channel done"); } -static void shallow_copy_session(struct ust_app_session *ua_sess, +static void shadow_copy_session(struct ust_app_session *ua_sess, struct ltt_ust_session *usess) { struct cds_lfht_node *node, *ua_chan_node; @@ -420,7 +438,7 @@ static void shallow_copy_session(struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan; struct ust_app_channel *ua_chan; - DBG2("Shallow copy of session handle"); + DBG2("Shadow copy of session handle %d", ua_sess->handle); ua_sess->uid = usess->uid; @@ -432,27 +450,30 @@ static void shallow_copy_session(struct ust_app_session *ua_sess, uchan = caa_container_of(node, struct ltt_ust_channel, node); ua_chan_node = hashtable_lookup(ua_sess->channels, - (void *) uchan->name, strlen(uchan->name), &iter); + (void *)uchan->name, strlen(uchan->name), &iter); if (ua_chan_node == NULL) { - DBG2("Channel %s not found on shallow session copy, creating it", + DBG2("Channel %s not found on shadow session copy, creating it", uchan->name); - ua_chan = alloc_app_channel(uchan->name); + ua_chan = alloc_ust_app_channel(uchan->name); if (ua_chan == NULL) { /* malloc failed... continuing */ - continue; + goto next; } + + shadow_copy_channel(ua_chan, uchan); hashtable_add_unique(ua_sess->channels, &ua_chan->node); - } else { - ua_chan = caa_container_of(node, struct ust_app_channel, node); } - shallow_copy_channel(ua_chan, uchan); - +next: /* Next item in hash table */ hashtable_get_next(usess->domain_global.channels, &iter); } } +/* + * Return ust app session from the app session hashtable using the UST session + * uid. + */ static struct ust_app_session *lookup_session_by_app( struct ltt_ust_session *usess, struct ust_app *app) { @@ -461,8 +482,7 @@ static struct ust_app_session *lookup_session_by_app( /* Get right UST app session from app */ node = hashtable_lookup(app->sessions, - (void *) ((unsigned long) usess->uid), - sizeof(void *), &iter); + (void *) ((unsigned long) usess->uid), sizeof(void *), &iter); if (node == NULL) { goto error; } @@ -473,207 +493,323 @@ error: return NULL; } -int ust_app_add_channel(struct ltt_ust_session *usess, +/* + * Create a UST session onto the tracer of app and add it the session + * hashtable. + * + * Return ust app session or NULL on error. + */ +static struct ust_app_session *create_ust_app_session( + struct ltt_ust_session *usess, struct ust_app *app) +{ + int ret; + struct ust_app_session *ua_sess; + + ua_sess = lookup_session_by_app(usess, app); + if (ua_sess == NULL) { + DBG2("UST app pid: %d session uid %d not found, creating it", + app->key.pid, usess->uid); + ua_sess = alloc_ust_app_session(); + if (ua_sess == NULL) { + /* Only malloc can failed so something is really wrong */ + goto error; + } + shadow_copy_session(ua_sess, usess); + } + + if (ua_sess->handle == -1) { + ret = ustctl_create_session(app->key.sock); + if (ret < 0) { + ERR("Error creating session for app pid %d, sock %d", + app->key.pid, app->key.sock); + /* TODO: free() ua_sess */ + goto error; + } + + DBG2("UST app ustctl create session handle %d", ret); + ua_sess->handle = ret; + + /* Add ust app session to app's HT */ + hashtable_node_init(&ua_sess->node, + (void *)((unsigned long) ua_sess->uid), sizeof(void *)); + hashtable_add_unique(app->sessions, &ua_sess->node); + + DBG2("UST app session created successfully with handle %d", ret); + } + + return ua_sess; + +error: + return NULL; +} + +static struct ust_app_channel *create_ust_app_channel( + struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, + struct ust_app *app) +{ + int ret = 0; + struct cds_lfht_iter iter; + struct cds_lfht_node *ua_chan_node; + struct ust_app_channel *ua_chan; + + /* Lookup channel in the ust app session */ + ua_chan_node = hashtable_lookup(ua_sess->channels, + (void *)uchan->name, strlen(uchan->name), &iter); + if (ua_chan_node == NULL) { + DBG2("Unable to find channel %s in ust session uid %u", + uchan->name, ua_sess->uid); + ua_chan = alloc_ust_app_channel(uchan->name); + if (ua_chan == NULL) { + goto error; + } + shadow_copy_channel(ua_chan, uchan); + hashtable_add_unique(ua_sess->channels, &ua_chan->node); + } else { + ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); + } + + /* TODO: remove cast and use lttng-ust-abi.h */ + ret = ustctl_create_channel(app->key.sock, ua_sess->handle, + (struct lttng_ust_channel_attr *)&uchan->attr, &ua_chan->obj); + if (ret < 0) { + DBG("Error creating channel %s for app (pid: %d, sock: %d) " + "and session handle %d with ret %d", + ua_chan->name, app->key.pid, app->key.sock, + ua_sess->handle, ret); + goto error; + } + + ua_chan->handle = ua_chan->obj->handle; + ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; + ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; + ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; + + DBG2("Channel %s UST create successfully for pid:%d and sock:%d", + ua_chan->name, app->key.pid, app->key.sock); + + return ua_chan; + +error: + return NULL; +} + +static struct ust_app_event *create_ust_app_event( + struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan, + struct ltt_ust_event *uevent, struct ust_app *app) +{ + int ret; + struct cds_lfht_iter iter; + struct cds_lfht_node *ua_event_node; + struct ust_app_event *ua_event; + + /* Get event node */ + ua_event_node = hashtable_lookup(ua_chan->events, + (void *)uevent->attr.name, strlen(uevent->attr.name), &iter); + if (ua_event_node == NULL) { + DBG2("UST app event %s not found, creating it", uevent->attr.name); + /* Does not exist so create one */ + ua_event = alloc_ust_app_event(uevent->attr.name); + if (ua_event == NULL) { + /* Only malloc can failed so something is really wrong */ + goto error; + } + shadow_copy_event(ua_event, uevent); + + hashtable_add_unique(ua_chan->events, &ua_event->node); + } else { + ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); + } + + /* Create UST event on tracer */ + ret = ustctl_create_event(app->key.sock, &uevent->attr, ua_chan->obj, + &ua_event->obj); + if (ret < 0) { + ERR("Error ustctl create event %s for app pid: %d with ret %d", + uevent->attr.name, app->key.pid, ret); + /* TODO: free() ua_event */ + goto error; + } + ua_event->handle = ua_event->obj->handle; + ua_event->enabled = 1; + + + DBG2("Event %s UST create successfully for pid:%d", uevent->attr.name, + app->key.pid); + + return ua_event; + +error: + return NULL; +} + +static int create_ust_app_metadata(struct ust_app_session *ua_sess, + char *pathname, struct ust_app *app) +{ + int ret = 0; + struct lttng_ust_channel_attr uattr; + + if (ua_sess->metadata == NULL) { + /* Allocate UST metadata */ + ua_sess->metadata = trace_ust_create_metadata(pathname); + if (ua_sess->metadata == NULL) { + ERR("UST app session %d creating metadata failed", + ua_sess->handle); + goto error; + } + + uattr.overwrite = ua_sess->metadata->attr.overwrite; + uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; + uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; + uattr.switch_timer_interval = + ua_sess->metadata->attr.switch_timer_interval; + uattr.read_timer_interval = + ua_sess->metadata->attr.read_timer_interval; + uattr.output = ua_sess->metadata->attr.output; + + /* UST tracer metadata creation */ + ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, + &ua_sess->metadata->obj); + if (ret < 0) { + ERR("UST app open metadata failed for app pid:%d", + app->key.pid); + goto error; + } + + DBG2("UST metadata opened for app pid %d", app->key.pid); + } + + /* Open UST metadata stream */ + if (ua_sess->metadata->stream_obj == NULL) { + ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, + &ua_sess->metadata->stream_obj); + if (ret < 0) { + ERR("UST create metadata stream failed"); + goto error; + } + + ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s-%d", + pathname, app->name, app->key.pid); + if (ret < 0) { + PERROR("asprintf UST create stream"); + goto error; + } + + ret = mkdir(ua_sess->metadata->pathname, S_IRWXU | S_IRWXG); + if (ret < 0) { + PERROR("mkdir UST metadata"); + goto error; + } + + ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s-%d/metadata", + pathname, app->name, app->key.pid); + if (ret < 0) { + PERROR("asprintf UST create stream"); + goto error; + } + + DBG2("UST metadata stream object created for app pid %d", + app->key.pid); + } + + return 0; + +error: + return -1; +} + +/* + * Add channel to all ust app session. + */ +int ust_app_add_channel_all(struct ltt_ust_session *usess, struct ltt_ust_channel *uchan) { int ret = 0; struct cds_lfht_iter iter; - struct cds_lfht_node *node, *ua_chan_node; + struct cds_lfht_node *node; struct ust_app *app; struct ust_app_session *ua_sess; struct ust_app_channel *ua_chan; + if (usess == NULL || uchan == NULL) { + ERR("Adding UST global channel to NULL values"); + ret = -1; + goto error; + } + DBG2("UST app adding channel %s to global domain for session uid %d", uchan->name, usess->uid); rcu_read_lock(); + + /* For every UST applications registered */ hashtable_get_first(ust_app_ht, &iter); while ((node = hashtable_iter_get_node(&iter)) != NULL) { app = caa_container_of(node, struct ust_app, node); - ua_sess = lookup_session_by_app(usess, app); - if (ua_sess == NULL) { - DBG2("UST app pid: %d session uid %d not found, creating one", - app->key.pid, usess->uid); - ua_sess = alloc_app_session(); - if (ua_sess == NULL) { - /* Only malloc can failed so something is really wrong */ - goto next; - } - shallow_copy_session(ua_sess, usess); - } - - if (ua_sess->handle == -1) { - ret = ustctl_create_session(app->key.sock); - if (ret < 0) { - DBG("Error creating session for app pid %d, sock %d", - app->key.pid, app->key.sock); - /* TODO: free() ua_sess */ - goto next; - } - - DBG2("UST app ustctl create session handle %d", ret); - ua_sess->handle = ret; - - /* Add ust app session to app's HT */ - hashtable_node_init(&ua_sess->node, - (void *)((unsigned long) ua_sess->uid), sizeof(void *)); - hashtable_add_unique(app->sessions, &ua_sess->node); - } - - /* Lookup channel in the ust app session */ - ua_chan_node = hashtable_lookup(ua_sess->channels, - (void *) uchan->name, strlen(uchan->name), &iter); - if (ua_chan_node == NULL) { - ERR("Channel suppose to be present with the above shallow " - "session copy. Continuing..."); + /* Create session on the tracer side and add it to app session HT */ + ua_sess = create_ust_app_session(usess, app); + if (ret < 0) { goto next; } - ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); - - /* TODO: remove cast and use lttng-ust-abi.h */ - ret = ustctl_create_channel(app->key.sock, ua_sess->handle, - (struct lttng_ust_channel_attr *)&uchan->attr, &ua_chan->obj); - if (ret < 0) { - DBG("Error creating channel %s for app (pid: %d, sock: %d) " - "and session handle %d with ret %d", - uchan->name, app->key.pid, app->key.sock, - ua_sess->handle, ret); + /* Create channel onto application */ + ua_chan = create_ust_app_channel(ua_sess, uchan, app); + if (ua_chan == NULL) { goto next; } - ua_chan->handle = ua_chan->obj->handle; - ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; - ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; - ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; - - DBG2("Channel %s UST create successfully for pid:%d and sock:%d", - uchan->name, app->key.pid, app->key.sock); - next: /* Next applications */ hashtable_get_next(ust_app_ht, &iter); } rcu_read_unlock(); +error: return ret; } -int ust_app_add_event(struct ltt_ust_session *usess, +int ust_app_add_event_all(struct ltt_ust_session *usess, struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) { int ret = 0; struct cds_lfht_iter iter; - struct cds_lfht_node *node, *ua_chan_node, *ua_event_node; + struct cds_lfht_node *node, *ua_chan_node; struct ust_app *app; struct ust_app_session *ua_sess; struct ust_app_channel *ua_chan; struct ust_app_event *ua_event; - struct lttng_ust_event ltt_uevent; - struct lttng_ust_object_data *obj_event; DBG2("UST app adding event %s to global domain for session uid %d", uevent->attr.name, usess->uid); rcu_read_lock(); + + /* For all registered applications */ hashtable_get_first(ust_app_ht, &iter); while ((node = hashtable_iter_get_node(&iter)) != NULL) { app = caa_container_of(node, struct ust_app, node); - ua_sess = lookup_session_by_app(usess, app); - if (ua_sess == NULL) { - DBG2("UST app (pid: %d, sock: %d) session not found, creating one", - app->key.pid, app->key.sock); - ua_sess = alloc_app_session(); - if (ua_sess == NULL) { - /* Only malloc can failed so something is really wrong */ - goto next; - } - shallow_copy_session(ua_sess, usess); - } - - if (ua_sess->handle == -1) { - ret = ustctl_create_session(app->key.sock); - if (ret < 0) { - DBG("Error creating session for app pid %d, sock %d", - app->key.pid, app->key.sock); - /* TODO: free() ua_sess */ - goto next; - } - - DBG2("UST app ustctl create session handle %d", ret); - ua_sess->handle = ret; - /* Add ust app session to app's HT */ - hashtable_node_init(&ua_sess->node, - (void *)((unsigned long) ua_sess->uid), sizeof(void *)); - hashtable_add_unique(app->sessions, &ua_sess->node); + /* Create session on the tracer side and add it to app session HT */ + ua_sess = create_ust_app_session(usess, app); + if (ret < 0) { + goto next; } /* Lookup channel in the ust app session */ ua_chan_node = hashtable_lookup(ua_sess->channels, - (void *) uchan->name, strlen(uchan->name), &iter); + (void *)uchan->name, strlen(uchan->name), &iter); if (ua_chan_node == NULL) { - ERR("Channel suppose to be present with the above shallow " - "session copy. Continuing..."); + ERR("Channel %s not found in session uid %d. Skipping", + uchan->name, usess->uid); goto next; } - ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); - /* Prepare lttng ust event */ - strncpy(ltt_uevent.name, uevent->attr.name, sizeof(ltt_uevent.name)); - ltt_uevent.name[sizeof(ltt_uevent.name) - 1] = '\0'; - /* TODO: adjust to other instrumentation types */ - ltt_uevent.instrumentation = LTTNG_UST_TRACEPOINT; - - /* Get event node */ - ua_event_node = hashtable_lookup(ua_chan->events, - (void *) uevent->attr.name, strlen(uevent->attr.name), &iter); - if (ua_event_node == NULL) { - DBG2("UST app event %s not found, creating one", uevent->attr.name); - /* Does not exist so create one */ - ua_event = alloc_app_event(uevent->attr.name); - if (ua_event == NULL) { - /* Only malloc can failed so something is really wrong */ - goto next; - } - - shallow_copy_event(ua_event, uevent); - - /* Create UST event on tracer */ - ret = ustctl_create_event(app->key.sock, <t_uevent, ua_chan->obj, - &obj_event); - if (ret < 0) { - ERR("Error ustctl create event %s for app pid: %d with ret %d", - uevent->attr.name, app->key.pid, ret); - /* TODO: free() ua_event and obj_event */ - goto next; - } - ua_event->obj = obj_event; - ua_event->handle = obj_event->handle; - ua_event->enabled = 1; - } else { - ua_event = caa_container_of(ua_event_node, - struct ust_app_event, node); - - if (ua_event->enabled == 0) { - ret = ustctl_enable(app->key.sock, ua_event->obj); - if (ret < 0) { - ERR("Error ustctl enable event %s for app " - "pid: %d with ret %d", uevent->attr.name, - app->key.pid, ret); - goto next; - } - ua_event->enabled = 1; - } + ua_event = create_ust_app_event(ua_sess, ua_chan, uevent, app); + if (ua_event == NULL) { + goto next; } - hashtable_add_unique(ua_chan->events, &ua_event->node); - - DBG2("Event %s UST create successfully for pid:%d", uevent->attr.name, - app->key.pid); - next: /* Next applications */ hashtable_get_next(ust_app_ht, &iter); @@ -683,158 +819,108 @@ next: return ret; } -int ust_app_start_trace(struct ltt_ust_session *usess) +int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) { int ret = 0; struct cds_lfht_iter iter; - struct cds_lfht_node *node, *ua_chan_node; - struct ust_app *app; + struct cds_lfht_node *node; struct ust_app_session *ua_sess; struct ust_app_channel *ua_chan; - struct lttng_ust_channel_attr uattr; - struct ltt_ust_channel *uchan; - DBG("Starting all UST traces"); + DBG("Starting tracing for ust app pid %d", app->key.pid); - rcu_read_lock(); - hashtable_get_first(ust_app_ht, &iter); - while ((node = hashtable_iter_get_node(&iter)) != NULL) { - app = caa_container_of(node, struct ust_app, node); + ua_sess = lookup_session_by_app(usess, app); + if (ua_sess == NULL) { + /* Only malloc can failed so something is really wrong */ + goto error; + } - ua_sess = lookup_session_by_app(usess, app); - if (ua_sess == NULL) { - /* Only malloc can failed so something is really wrong */ - goto next; - } + ret = create_ust_app_metadata(ua_sess, usess->pathname, app); + if (ret < 0) { + goto error; + } - if (ua_sess->metadata == NULL) { - /* Allocate UST metadata */ - ua_sess->metadata = trace_ust_create_metadata(usess->pathname); - if (ua_sess->metadata == NULL) { - ERR("UST app session %d creating metadata failed", - ua_sess->handle); - goto next; - } + /* For each channel */ + hashtable_get_first(ua_sess->channels, &iter); + while ((node = hashtable_iter_get_node(&iter)) != NULL) { + ua_chan = caa_container_of(node, struct ust_app_channel, node); - uattr.overwrite = ua_sess->metadata->attr.overwrite; - uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; - uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; - uattr.switch_timer_interval = - ua_sess->metadata->attr.switch_timer_interval; - uattr.read_timer_interval = - ua_sess->metadata->attr.read_timer_interval; - uattr.output = ua_sess->metadata->attr.output; - - /* UST tracer metadata creation */ - ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, - &ua_sess->metadata->obj); - if (ret < 0) { - ERR("UST app open metadata failed for app pid:%d", - app->key.pid); - goto next; - } + /* Create all streams */ + while (1) { + struct ltt_ust_stream *ustream; - DBG2("UST metadata opened for app pid %d", app->key.pid); - } + ustream = zmalloc(sizeof(*ustream)); + if (ustream == NULL) { + PERROR("zmalloc ust stream"); + continue; + } - /* Open UST metadata stream */ - if (ua_sess->metadata->stream_obj == NULL) { - ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, - &ua_sess->metadata->stream_obj); + ret = ustctl_create_stream(app->key.sock, ua_chan->obj, + &ustream->obj); if (ret < 0) { - ERR("UST create metadata stream failed"); - goto next; + /* Got all streams */ + break; } + ustream->handle = ustream->obj->handle; - ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s-%d", - usess->pathname, app->name, app->key.pid); + /* Order is important */ + cds_list_add_tail(&ustream->list, &ua_chan->streams.head); + ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s-%d/%s_%u", + usess->pathname, app->name, app->key.pid, + ua_chan->name, ua_chan->streams.count++); if (ret < 0) { PERROR("asprintf UST create stream"); - goto next; + continue; } + DBG2("UST stream %d ready at %s", ua_chan->streams.count, + ustream->pathname); + } - ret = mkdir(ua_sess->metadata->pathname, S_IRWXU | S_IRWXG); - if (ret < 0) { - goto next; - } + /* Next applications */ + hashtable_get_next(ua_sess->channels, &iter); + } - ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s-%d/metadata", - usess->pathname, app->name, app->key.pid); - if (ret < 0) { - PERROR("asprintf UST create stream"); - goto next; - } + /* Setup UST consumer socket and send fds to it */ + ret = ust_consumer_send_session(usess->consumer_fd, ua_sess); + if (ret < 0) { + goto error; + } - DBG2("UST metadata stream object created for app pid %d", - app->key.pid); - } + /* This start the UST tracing */ + ret = ustctl_start_session(app->key.sock, ua_sess->handle); + if (ret < 0) { + ERR("Error starting tracing for app pid: %d", app->key.pid); + goto error; + } - /* For each channel */ - hashtable_get_first(usess->domain_global.channels, &iter); - while ((node = hashtable_iter_get_node(&iter)) != NULL) { - uchan = caa_container_of(node, struct ltt_ust_channel, node); - - /* Lookup channel in the ust app session */ - ua_chan_node = hashtable_lookup(ua_sess->channels, - (void *) uchan->name, strlen(uchan->name), &iter); - if (ua_chan_node == NULL) { - ERR("Channel suppose to be present with the above shallow " - "session copy. Continuing..."); - goto next; - } + /* Quiescent wait after starting trace */ + ustctl_wait_quiescent(app->key.sock); - ua_chan = caa_container_of(ua_chan_node, - struct ust_app_channel, node); - - for (;;) { - struct lttng_ust_object_data *obj; - struct ltt_ust_stream *ustream; - - ret = ustctl_create_stream(app->key.sock, ua_chan->obj, - &obj); - if (ret < 0) { - /* Got all streams */ - goto next_chan; - } - - ustream = malloc(sizeof(*ustream)); - if (ustream == NULL) { - goto next_chan; - } - memset(ustream, 0, sizeof(struct ltt_ust_stream)); - ustream->obj = obj; - ustream->handle = ustream->obj->handle; - /* Order is important */ - cds_list_add_tail(&ustream->list, &ua_chan->streams.head); - ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s-%d/%s_%u", - usess->pathname, app->name, app->key.pid, - uchan->name, ua_chan->streams.count++); - if (ret < 0) { - PERROR("asprintf UST create stream"); - goto next_chan; - } - } + return 0; -next_chan: - /* Next applications */ - hashtable_get_next(ua_sess->channels, &iter); - } +error: + return -1; +} - /* Setup UST consumer socket and send fds to it */ - ret = ust_consumer_send_session(usess->consumer_fd, ua_sess); - if (ret < 0) { - goto next; - } +int ust_app_start_trace_all(struct ltt_ust_session *usess) +{ + int ret = 0; + struct cds_lfht_iter iter; + struct cds_lfht_node *node; + struct ust_app *app; - /* This start the UST tracing */ - ret = ustctl_start_session(app->key.sock, ua_sess->handle); + DBG("Starting all UST traces"); + + rcu_read_lock(); + hashtable_get_first(ust_app_ht, &iter); + while ((node = hashtable_iter_get_node(&iter)) != NULL) { + app = caa_container_of(node, struct ust_app, node); + + ret = ust_app_start_trace(usess, app); if (ret < 0) { - ERR("Error starting tracing for app pid: %d", app->key.pid); goto next; } - /* Quiescent wait after starting trace */ - ustctl_wait_quiescent(app->key.sock); next: /* Next applications */ hashtable_get_next(ust_app_ht, &iter); @@ -847,17 +933,14 @@ next: void ust_app_global_update(struct ltt_ust_session *usess, int sock) { int ret = 0; - int session_existed = 1; struct cds_lfht_iter iter; - struct cds_lfht_node *node, *ua_chan_node; + struct cds_lfht_node *node; struct ust_app *app; struct ust_app_session *ua_sess; struct ust_app_channel *ua_chan; struct ust_app_event *ua_event; - struct lttng_ust_event ltt_uevent; struct ltt_ust_channel *uchan; - struct lttng_ust_object_data *obj_event; - struct lttng_ust_channel_attr uattr; + struct ltt_ust_event *uevent; rcu_read_lock(); @@ -875,226 +958,44 @@ void ust_app_global_update(struct ltt_ust_session *usess, int sock) goto error; } - ua_sess = lookup_session_by_app(usess, app); + ua_sess = create_ust_app_session(usess, app); if (ua_sess == NULL) { - DBG2("UST app pid: %d session uid %d not found, creating one", - app->key.pid, usess->uid); - ua_sess = alloc_app_session(); - if (ua_sess == NULL) { - /* Only malloc can failed so something is really wrong */ - goto error; - } - shallow_copy_session(ua_sess, usess); - session_existed= 0; - } - - if (ua_sess->handle == -1) { - ret = ustctl_create_session(app->key.sock); - if (ret < 0) { - DBG("Error creating session for app pid %d, sock %d", - app->key.pid, app->key.sock); - /* TODO: free() ua_sess */ - goto error; - } - - DBG2("UST app ustctl create session handle %d", ret); - ua_sess->handle = ret; - - /* Add ust app session to app's HT */ - hashtable_node_init(&ua_sess->node, - (void *)((unsigned long) ua_sess->uid), sizeof(void *)); - hashtable_add_unique(app->sessions, &ua_sess->node); - } - - if (session_existed) { goto error; } - if (ua_sess->metadata == NULL) { - /* Allocate UST metadata */ - ua_sess->metadata = trace_ust_create_metadata(usess->pathname); - if (ua_sess->metadata == NULL) { - ERR("UST app session %d creating metadata failed", - ua_sess->handle); - goto error; - } - - uattr.overwrite = ua_sess->metadata->attr.overwrite; - uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; - uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; - uattr.switch_timer_interval = - ua_sess->metadata->attr.switch_timer_interval; - uattr.read_timer_interval = - ua_sess->metadata->attr.read_timer_interval; - uattr.output = ua_sess->metadata->attr.output; - - /* UST tracer metadata creation */ - ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, - &ua_sess->metadata->obj); - if (ret < 0) { - ERR("UST app open metadata failed for app pid:%d", - app->key.pid); - goto error; - } - - DBG2("UST metadata opened for app pid %d", app->key.pid); - } - - /* Open UST metadata stream */ - if (ua_sess->metadata->stream_obj == NULL) { - ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, - &ua_sess->metadata->stream_obj); - if (ret < 0) { - ERR("UST create metadata stream failed"); - goto error; - } - - ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s-%d", - usess->pathname, app->name, app->key.pid); - if (ret < 0) { - PERROR("asprintf UST create stream"); - goto error; - } - - ret = mkdir(ua_sess->metadata->pathname, S_IRWXU | S_IRWXG); - if (ret < 0) { - PERROR("mkdir UST metadata"); - goto error; - } - - ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s-%d/metadata", - usess->pathname, app->name, app->key.pid); - if (ret < 0) { - PERROR("asprintf UST create stream"); - goto error; - } - - DBG2("UST metadata stream object created for app pid %d", - app->key.pid); - } - - - /* Iterate over all channels */ hashtable_get_first(usess->domain_global.channels, &iter); while ((node = hashtable_iter_get_node(&iter)) != NULL) { uchan = caa_container_of(node, struct ltt_ust_channel, node); - /* Lookup channel in the ust app session */ - ua_chan_node = hashtable_lookup(ua_sess->channels, - (void *) uchan->name, strlen(uchan->name), &iter); - if (ua_chan_node == NULL) { - ERR("UST app channel not found for uchan %s", uchan->name); - goto next_chan; - } - - ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); - - /* TODO: remove cast and use lttng-ust-abi.h */ - ret = ustctl_create_channel(app->key.sock, ua_sess->handle, - (struct lttng_ust_channel_attr *)&uchan->attr, &ua_chan->obj); - if (ret < 0) { - DBG("Error creating channel %s for app (pid: %d, sock: %d) " - "and session handle %d with ret %d", - uchan->name, app->key.pid, app->key.sock, - ua_sess->handle, ret); + ua_chan = create_ust_app_channel(ua_sess, uchan, app); + if (ua_chan == NULL) { goto next_chan; } - ua_chan->handle = ua_chan->obj->handle; - ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; - ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; - ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; - - DBG2("Channel %s UST create successfully for pid:%d and sock:%d", - uchan->name, app->key.pid, app->key.sock); - - /* For each event(s) of that channel */ - hashtable_get_first(ua_chan->events, &iter); + hashtable_get_first(uchan->events, &iter); while ((node = hashtable_iter_get_node(&iter)) != NULL) { - ua_event = caa_container_of(node, struct ust_app_event, node); - - /* Prepare lttng ust event */ - memset(<t_uevent, 0, sizeof(ltt_uevent)); - strncpy(ltt_uevent.name, ua_event->name, sizeof(ltt_uevent.name)); - ltt_uevent.name[sizeof(ltt_uevent.name) - 1] = '\0'; + uevent = caa_container_of(node, struct ltt_ust_event, node); - /* TODO: adjust to other instrumentation types */ - ltt_uevent.instrumentation = LTTNG_UST_TRACEPOINT; - - /* Create UST event on tracer */ - ret = ustctl_create_event(app->key.sock, <t_uevent, ua_chan->obj, - &obj_event); - if (ret < 0) { - ERR("Error ustctl create event %s for app pid: %d with ret %d", - ua_event->name, app->key.pid, ret); - /* TODO: free() ua_event and obj_event */ + ua_event = create_ust_app_event(ua_sess, ua_chan, uevent, app); + if (ua_event == NULL) { goto next_event; } - ua_event->obj = obj_event; - ua_event->handle = obj_event->handle; - ua_event->enabled = 1; - - DBG2("Event %s UST create successfully for pid:%d", - ua_event->name, app->key.pid); - next_event: - hashtable_get_next(ua_chan->events, &iter); - } - - for (;;) { - struct lttng_ust_object_data *obj; - struct ltt_ust_stream *ustream; - - ret = ustctl_create_stream(app->key.sock, ua_chan->obj, &obj); - if (ret < 0) { - /* Got all streams */ - break; - } - - ustream = zmalloc(sizeof(*ustream)); - if (ustream == NULL) { - PERROR("zmalloc ust stream"); - goto error; - } - - ustream->obj = obj; - ustream->handle = ustream->obj->handle; - /* Order is important */ - cds_list_add_tail(&ustream->list, &ua_chan->streams.head); - - ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s-%d/%s_%u", - usess->pathname, app->name, app->key.pid, - uchan->name, ua_chan->streams.count++); - if (ret < 0) { - PERROR("asprintf UST create stream"); - goto error; - } + hashtable_get_next(uchan->events, &iter); } next_chan: - /* Next applications */ - hashtable_get_next(ua_sess->channels, &iter); + /* Next item in hash table */ + hashtable_get_next(usess->domain_global.channels, &iter); } if (usess->start_trace) { - /* Setup UST consumer socket and send fds to it */ - ret = ust_consumer_send_session(usess->consumer_fd, ua_sess); + ret = ust_app_start_trace(usess, app); if (ret < 0) { - ERR("UST consumer send session failed"); goto error; } - /* This start the UST tracing */ - ret = ustctl_start_session(app->key.sock, ua_sess->handle); - if (ret < 0) { - ERR("Error starting tracing for app pid: %d", app->key.pid); - goto error; - } - - /* Quiescent wait after starting trace */ - ustctl_wait_quiescent(app->key.sock); - DBG2("UST trace started for app pid %d", app->key.pid); } diff --git a/lttng-sessiond/ust-app.h b/lttng-sessiond/ust-app.h index 39e5bb6d2..76b81b29a 100644 --- a/lttng-sessiond/ust-app.h +++ b/lttng-sessiond/ust-app.h @@ -101,12 +101,13 @@ struct ust_app { int ust_app_register(struct ust_register_msg *msg, int sock); void ust_app_unregister(int sock); -int ust_app_add_channel(struct ltt_ust_session *usess, +int ust_app_add_channel_all(struct ltt_ust_session *usess, struct ltt_ust_channel *uchan); -int ust_app_add_event(struct ltt_ust_session *usess, +int ust_app_add_event_all(struct ltt_ust_session *usess, struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent); unsigned long ust_app_list_count(void); -int ust_app_start_trace(struct ltt_ust_session *usess); +int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app); +int ust_app_start_trace_all(struct ltt_ust_session *usess); void ust_app_global_update(struct ltt_ust_session *usess, int sock); void ust_app_clean_list(void); @@ -117,7 +118,12 @@ struct ust_app *ust_app_find_by_pid(pid_t pid); #else /* HAVE_LIBLTTNG_UST_CTL */ static inline -int ust_app_start_trace(struct ltt_ust_session *usess) +int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) +{ + return 0; +} +static inline +int ust_app_start_trace_all(struct ltt_ust_session *usess) { return 0; } @@ -158,13 +164,13 @@ struct ust_app *ust_app_get_by_pid(pid_t pid) return NULL; } static inline -int ust_app_add_channel(struct ltt_ust_session *usess, +int ust_app_add_channel_all(struct ltt_ust_session *usess, struct ltt_ust_channel *uchan) { return 0; } static inline -int ust_app_add_event(struct ltt_ust_session *usess, +int ust_app_add_event_all(struct ltt_ust_session *usess, struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) { return 0; -- 2.34.1