+++ /dev/null
-/*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; only version 2
- * of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#define _GNU_SOURCE
-#include <errno.h>
-#include <pthread.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <lttngerr.h>
-#include <lttng-share.h>
-
-#include "hashtable.h"
-#include "ust-app.h"
-#include "../hashtable/hash.h"
-#include "ust-ctl.h"
-#include "ust-consumer.h"
-
-/*
- * Delete a traceable application structure from the global list.
- */
-static void delete_ust_app(struct ust_app *lta)
-{
- int ret;
- struct cds_lfht_node *node;
- struct cds_lfht_iter iter;
-
- rcu_read_lock();
-
- /* TODO: clean session hashtable */
- free(lta->sessions);
- close(lta->key.sock);
-
- /* Remove from apps hash table */
- node = hashtable_lookup(ust_app_ht,
- (void *) ((unsigned long) lta->key.pid), sizeof(void *), &iter);
- if (node == NULL) {
- ERR("UST app pid %d not found in hash table", lta->key.pid);
- } else {
- ret = hashtable_del(ust_app_ht, &iter);
- if (ret) {
- ERR("UST app unable to delete app %d from hash table",
- lta->key.pid);
- } else {
- DBG2("UST app pid %d deleted", lta->key.pid);
- }
- }
-
- /* Remove from key hash table */
- node = hashtable_lookup(ust_app_sock_key_map,
- (void *) ((unsigned long) lta->key.sock), sizeof(void *), &iter);
- if (node == NULL) {
- ERR("UST app key %d not found in key hash table", lta->key.sock);
- } else {
- ret = hashtable_del(ust_app_sock_key_map, &iter);
- if (ret) {
- ERR("UST app unable to delete app sock %d from key hash table",
- lta->key.sock);
- } else {
- DBG2("UST app pair sock %d key %d deleted",
- lta->key.sock, lta->key.pid);
- }
- }
-
- free(lta);
-
- rcu_read_unlock();
-}
-
-/*
- * URCU intermediate call to delete an UST app.
- */
-static void delete_ust_app_rcu(struct rcu_head *head)
-{
- struct cds_lfht_node *node =
- caa_container_of(head, struct cds_lfht_node, head);
- struct ust_app *app =
- caa_container_of(node, struct ust_app, node);
-
- delete_ust_app(app);
-}
-
-/*
- * 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)
-{
- struct cds_lfht_node *node;
- struct ust_app_key *key;
- struct cds_lfht_iter iter;
-
- node = hashtable_lookup(ust_app_sock_key_map,
- (void *)((unsigned long) sock), sizeof(void *), &iter);
- if (node == NULL) {
- DBG2("UST app find by sock %d key not found", sock);
- goto error;
- }
-
- key = caa_container_of(node, struct ust_app_key, node);
-
- node = hashtable_lookup(ust_app_ht,
- (void *)((unsigned long) key->pid), sizeof(void *), &iter);
- if (node == NULL) {
- DBG2("UST app find by sock %d not found", sock);
- goto error;
- }
-
- return caa_container_of(node, struct ust_app, node);
-
-error:
- return NULL;
-}
-
-/*
- * Return pointer to traceable apps list.
- */
-struct cds_lfht *ust_app_get_ht(void)
-{
- return ust_app_ht;
-}
-
-/*
- * Return ust app pointer or NULL if not found.
- */
-struct ust_app *ust_app_find_by_pid(pid_t pid)
-{
- struct cds_lfht_node *node;
- struct cds_lfht_iter iter;
-
- rcu_read_lock();
- node = hashtable_lookup(ust_app_ht,
- (void *)((unsigned long) pid), sizeof(void *), &iter);
- if (node == NULL) {
- rcu_read_unlock();
- DBG2("UST app no found with pid %d", pid);
- goto error;
- }
- rcu_read_unlock();
-
- DBG2("Found UST app by pid %d", pid);
-
- return caa_container_of(node, struct ust_app, node);
-
-error:
- return NULL;
-}
-
-/*
- * Using pid and uid (of the app), allocate a new ust_app struct and
- * add it to the global traceable app list.
- *
- * On success, return 0, else return malloc ENOMEM.
- */
-int ust_app_register(struct ust_register_msg *msg, int sock)
-{
- struct ust_app *lta;
-
- lta = malloc(sizeof(struct ust_app));
- if (lta == NULL) {
- PERROR("malloc");
- return -ENOMEM;
- }
-
- lta->uid = msg->uid;
- lta->gid = msg->gid;
- lta->key.pid = msg->pid;
- lta->ppid = msg->ppid;
- lta->v_major = msg->major;
- lta->v_minor = msg->minor;
- lta->key.sock = sock;
- strncpy(lta->name, msg->name, sizeof(lta->name));
- lta->name[16] = '\0';
- hashtable_node_init(<a->node, (void *)((unsigned long)lta->key.pid),
- sizeof(void *));
-
- /* Session hashtable */
- lta->sessions = hashtable_new(0);
-
- /* Set sock key map */
- hashtable_node_init(<a->key.node, (void *)((unsigned long)lta->key.sock),
- sizeof(void *));
-
- rcu_read_lock();
- hashtable_add_unique(ust_app_ht, <a->node);
- hashtable_add_unique(ust_app_sock_key_map, <a->key.node);
- rcu_read_unlock();
-
- DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s"
- " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid,
- lta->key.sock, lta->name, lta->v_major, lta->v_minor);
-
- return 0;
-}
-
-/*
- * Unregister app by removing it from the global traceable app list and freeing
- * the data struct.
- *
- * The socket is already closed at this point so no close to sock.
- */
-void ust_app_unregister(int sock)
-{
- struct ust_app *lta;
- struct cds_lfht_node *node;
- struct cds_lfht_iter iter;
-
- rcu_read_lock();
- lta = find_app_by_sock(sock);
- 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;
-}
-
-/*
- * Return traceable_app_count
- */
-unsigned long ust_app_list_count(void)
-{
- unsigned long count;
-
- rcu_read_lock();
- count = hashtable_get_count(ust_app_ht);
- rcu_read_unlock();
-
- return count;
-}
-
-/*
- * Fill events array with all events name of all registered apps.
- */
-int ust_app_list_events(struct lttng_event **events)
-{
- int ret, handle;
- size_t nbmem, count = 0;
- struct cds_lfht_iter iter;
- struct ust_app *app;
- struct lttng_event *tmp;
-
- nbmem = UST_APP_EVENT_LIST_SIZE;
- tmp = zmalloc(nbmem * sizeof(struct lttng_event));
- if (tmp == NULL) {
- PERROR("zmalloc ust app events");
- ret = -ENOMEM;
- goto error;
- }
-
- rcu_read_lock();
-
- cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
- handle = ustctl_tracepoint_list(app->key.sock);
- if (handle < 0) {
- ERR("UST app list events getting handle failed for app pid %d",
- app->key.pid);
- continue;
- }
-
- while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle,
- tmp[count].name)) != -ENOENT) {
- if (count > nbmem) {
- DBG2("Reallocating event list from %zu to %zu bytes", nbmem,
- nbmem + UST_APP_EVENT_LIST_SIZE);
- nbmem += UST_APP_EVENT_LIST_SIZE;
- tmp = realloc(tmp, nbmem);
- if (tmp == NULL) {
- PERROR("realloc ust app events");
- ret = -ENOMEM;
- goto rcu_error;
- }
- }
-
- tmp[count].type = LTTNG_UST_TRACEPOINT;
- tmp[count].pid = app->key.pid;
- count++;
- }
- }
-
- ret = count;
- *events = tmp;
-
- DBG2("UST app list events done (%zu events)", count);
-
-rcu_error:
- rcu_read_unlock();
-error:
- return ret;
-}
-
-/*
- * Free and clean all traceable apps of the global list.
- */
-void ust_app_clean_list(void)
-{
- int ret;
- struct cds_lfht_node *node;
- struct cds_lfht_iter iter;
-
- DBG2("UST app clean hash table");
-
- rcu_read_lock();
-
- hashtable_get_first(ust_app_ht, &iter);
- while ((node = hashtable_iter_get_node(&iter)) != NULL) {
- ret = hashtable_del(ust_app_ht, &iter);
- if (!ret) {
- call_rcu(&node->head, delete_ust_app_rcu);
- }
- hashtable_get_next(ust_app_ht, &iter);
- }
-
- rcu_read_unlock();
-}
-
-/*
- * Init UST app hash table.
- */
-void ust_app_ht_alloc(void)
-{
- ust_app_ht = hashtable_new(0);
- ust_app_sock_key_map = hashtable_new(0);
-}
-
-/*
- * Alloc new UST app session.
- */
-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->handle = -1;
- ua_sess->channels = hashtable_new_str(0);
-
- return ua_sess;
-
-error:
- return NULL;
-}
-
-/*
- * 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");
- goto error;
- }
-
- strncpy(ua_chan->name, name, sizeof(ua_chan->name));
- ua_chan->name[sizeof(ua_chan->name) - 1] = '\0';
- ua_chan->handle = -1;
- ua_chan->ctx = hashtable_new(0);
- CDS_INIT_LIST_HEAD(&ua_chan->streams.head);
- ua_chan->events = hashtable_new_str(0);
- hashtable_node_init(&ua_chan->node, (void *) ua_chan->name,
- strlen(ua_chan->name));
-
- DBG3("UST app channel %s allocated", ua_chan->name);
-
- return ua_chan;
-
-error:
- return NULL;
-}
-
-/*
- * 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");
- goto error;
- }
-
- strncpy(ua_event->name, name, sizeof(ua_event->name));
- ua_event->name[sizeof(ua_event->name) - 1] = '\0';
- ua_event->ctx = hashtable_new(0);
- hashtable_node_init(&ua_event->node, (void *) ua_event->name,
- strlen(ua_event->name));
-
- DBG3("UST app event %s allocated", ua_event->name);
-
- return ua_event;
-
-error:
- return NULL;
-}
-
-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));
- ua_event->name[sizeof(ua_event->name) - 1] = '\0';
-
- /* TODO: support copy context */
-}
-
-static void shadow_copy_channel(struct ust_app_channel *ua_chan,
- struct ltt_ust_channel *uchan)
-{
- struct cds_lfht_iter iter;
- struct cds_lfht_node *node, *ua_event_node;
- struct ltt_ust_event *uevent;
- struct ust_app_event *ua_event;
-
- 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);
-
- 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 shadow copy channel",
- uevent->attr.name);
- ua_event = alloc_ust_app_event(uevent->attr.name);
- if (ua_event == NULL) {
- goto next;
- }
- shadow_copy_event(ua_event, uevent);
- hashtable_add_unique(ua_chan->events, &ua_event->node);
- }
-
-next:
- /* Get next UST events */
- hashtable_get_next(uchan->events, &iter);
- }
-
- DBG3("Shadow copy channel done");
-}
-
-static void shadow_copy_session(struct ust_app_session *ua_sess,
- struct ltt_ust_session *usess)
-{
- struct cds_lfht_node *node, *ua_chan_node;
- struct cds_lfht_iter iter;
- struct ltt_ust_channel *uchan;
- struct ust_app_channel *ua_chan;
-
- DBG2("Shadow copy of session handle %d", ua_sess->handle);
-
- ua_sess->uid = usess->uid;
-
- /* TODO: support all UST domain */
-
- /* Iterate over all channels in global domain. */
- 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);
-
- ua_chan_node = hashtable_lookup(ua_sess->channels,
- (void *)uchan->name, strlen(uchan->name), &iter);
- if (ua_chan_node == NULL) {
- DBG2("Channel %s not found on shadow session copy, creating it",
- uchan->name);
- ua_chan = alloc_ust_app_channel(uchan->name);
- if (ua_chan == NULL) {
- /* malloc failed... continuing */
- goto next;
- }
-
- shadow_copy_channel(ua_chan, uchan);
- hashtable_add_unique(ua_sess->channels, &ua_chan->node);
- }
-
-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)
-{
- struct cds_lfht_iter iter;
- struct cds_lfht_node *node;
-
- /* Get right UST app session from app */
- node = hashtable_lookup(app->sessions,
- (void *) ((unsigned long) usess->uid), sizeof(void *), &iter);
- if (node == NULL) {
- goto error;
- }
-
- return caa_container_of(node, struct ust_app_session, node);
-
-error:
- return NULL;
-}
-
-/*
- * 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;
- 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);
-
- /* Create session on the tracer side and add it to app session HT */
- ua_sess = create_ust_app_session(usess, app);
- if (ua_sess == NULL) {
- goto next;
- }
-
- /* Create channel onto application */
- ua_chan = create_ust_app_channel(ua_sess, uchan, app);
- if (ua_chan == NULL) {
- goto next;
- }
-
-next:
- /* Next applications */
- hashtable_get_next(ust_app_ht, &iter);
- }
- rcu_read_unlock();
-
-error:
- return ret;
-}
-
-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;
- struct ust_app *app;
- struct ust_app_session *ua_sess;
- struct ust_app_channel *ua_chan;
- struct ust_app_event *ua_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);
-
- /* Create session on the tracer side and add it to app session HT */
- ua_sess = create_ust_app_session(usess, app);
- if (ua_sess == NULL) {
- goto next;
- }
-
- /* 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 %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);
-
- ua_event = create_ust_app_event(ua_sess, ua_chan, uevent, app);
- if (ua_event == NULL) {
- goto next;
- }
-
-next:
- /* Next applications */
- hashtable_get_next(ust_app_ht, &iter);
- }
- rcu_read_unlock();
-
- return ret;
-}
-
-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;
- struct ust_app_session *ua_sess;
- struct ust_app_channel *ua_chan;
-
- DBG("Starting tracing for ust app pid %d", app->key.pid);
-
- rcu_read_lock();
-
- ua_sess = lookup_session_by_app(usess, app);
- if (ua_sess == NULL) {
- /* Only malloc can failed so something is really wrong */
- goto error_rcu_unlock;
- }
-
- ret = create_ust_app_metadata(ua_sess, usess->pathname, app);
- if (ret < 0) {
- goto error_rcu_unlock;
- }
-
- /* 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);
-
- /* Create all streams */
- while (1) {
- struct ltt_ust_stream *ustream;
-
- ustream = zmalloc(sizeof(*ustream));
- if (ustream == NULL) {
- PERROR("zmalloc ust stream");
- goto error_rcu_unlock;
- }
-
- ret = ustctl_create_stream(app->key.sock, ua_chan->obj,
- &ustream->obj);
- if (ret < 0) {
- /* Got all streams */
- break;
- }
- 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,
- ua_chan->name, ua_chan->streams.count++);
- if (ret < 0) {
- PERROR("asprintf UST create stream");
- continue;
- }
- DBG2("UST stream %d ready at %s", ua_chan->streams.count,
- ustream->pathname);
- }
-
- /* Next applications */
- hashtable_get_next(ua_sess->channels, &iter);
- }
-
- /* Setup UST consumer socket and send fds to it */
- ret = ust_consumer_send_session(usess->consumer_fd, ua_sess);
- if (ret < 0) {
- goto error_rcu_unlock;
- }
-
- /* 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_rcu_unlock;
- }
- rcu_read_unlock();
-
- /* Quiescent wait after starting trace */
- ustctl_wait_quiescent(app->key.sock);
-
- return 0;
-
-error_rcu_unlock:
- rcu_read_unlock();
- return -1;
-}
-
-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;
-
- 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) {
- goto next;
- }
-
-next:
- /* Next applications */
- hashtable_get_next(ust_app_ht, &iter);
- }
- rcu_read_unlock();
-
- return 0;
-}
-
-void ust_app_global_update(struct ltt_ust_session *usess, int sock)
-{
- int ret = 0;
- struct cds_lfht_iter iter;
- 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 ltt_ust_channel *uchan;
- struct ltt_ust_event *uevent;
-
- rcu_read_lock();
-
- if (usess == NULL) {
- DBG2("No UST session on global update. Returning");
- goto error;
- }
-
- DBG2("UST app global update for app sock %d for session uid %d", sock,
- usess->uid);
-
- app = find_app_by_sock(sock);
- if (app == NULL) {
- ERR("Failed to update app sock %d", sock);
- goto error;
- }
-
- ua_sess = create_ust_app_session(usess, app);
- if (ua_sess == NULL) {
- goto error;
- }
-
- 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);
-
- ua_chan = create_ust_app_channel(ua_sess, uchan, app);
- if (ua_chan == NULL) {
- goto next_chan;
- }
-
- hashtable_get_first(uchan->events, &iter);
- while ((node = hashtable_iter_get_node(&iter)) != NULL) {
- uevent = caa_container_of(node, struct ltt_ust_event, node);
-
- ua_event = create_ust_app_event(ua_sess, ua_chan, uevent, app);
- if (ua_event == NULL) {
- goto next_event;
- }
-
-next_event:
- hashtable_get_next(uchan->events, &iter);
- }
-
-next_chan:
- /* Next item in hash table */
- hashtable_get_next(usess->domain_global.channels, &iter);
- }
-
- if (usess->start_trace) {
- ret = ust_app_start_trace(usess, app);
- if (ret < 0) {
- goto error;
- }
-
- DBG2("UST trace started for app pid %d", app->key.pid);
- }
-
-error:
- rcu_read_unlock();
- return;
-}
projects / lttng-tools.git / blobdiff