/*
* 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 free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2 only,
+ * as published by the Free Software Foundation.
*
* 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.
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#define _GNU_SOURCE
#include <sys/types.h>
#include <unistd.h>
#include <urcu/compiler.h>
+#include <lttng/ust-error.h>
#include <common/common.h>
+#include <common/sessiond-comm/sessiond-comm.h>
+#include "fd-limit.h"
+#include "health.h"
#include "ust-app.h"
#include "ust-consumer.h"
#include "ust-ctl.h"
assert(!ret);
delete_ust_app_ctx(sock, ua_ctx);
}
+ free(ua_event->filter);
lttng_ht_destroy(ua_event->ctx);
if (ua_event->obj != NULL) {
{
if (stream->obj) {
ustctl_release_object(sock, stream->obj);
+ lttng_fd_put(LTTNG_FD_APPS, 2);
free(stream->obj);
}
free(stream);
if (ua_chan->obj != NULL) {
ustctl_release_object(sock, ua_chan->obj);
+ lttng_fd_put(LTTNG_FD_APPS, 2);
free(ua_chan->obj);
}
free(ua_chan);
if (ua_sess->metadata) {
if (ua_sess->metadata->stream_obj) {
ustctl_release_object(sock, ua_sess->metadata->stream_obj);
+ lttng_fd_put(LTTNG_FD_APPS, 2);
free(ua_sess->metadata->stream_obj);
}
if (ua_sess->metadata->obj) {
ustctl_release_object(sock, ua_sess->metadata->obj);
+ lttng_fd_put(LTTNG_FD_APPS, 2);
free(ua_sess->metadata->obj);
}
+ trace_ust_destroy_metadata(ua_sess->metadata);
}
cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan,
rcu_read_lock();
/* Delete ust app sessions info */
- sock = app->key.sock;
- app->key.sock = -1;
+ sock = app->sock;
+ app->sock = -1;
/* Wipe sessions */
cds_lfht_for_each_entry(app->sessions->ht, &iter.iter, ua_sess,
node.node) {
ret = lttng_ht_del(app->sessions, &iter);
assert(!ret);
- delete_ust_app_session(app->key.sock, ua_sess);
+ delete_ust_app_session(app->sock, ua_sess);
}
lttng_ht_destroy(app->sessions);
/*
- * Wait until we have removed the key from the sock hash table before
- * closing this socket, otherwise an application could re-use the socket ID
- * and race with the teardown, using the same hash table entry.
+ * Wait until we have deleted the application from the sock hash table
+ * before closing this socket, otherwise an application could re-use the
+ * socket ID and race with the teardown, using the same hash table entry.
+ *
+ * It's OK to leave the close in call_rcu. We want it to stay unique for
+ * all RCU readers that could run concurrently with unregister app,
+ * therefore we _need_ to only close that socket after a grace period. So
+ * it should stay in this RCU callback.
+ *
+ * This close() is a very important step of the synchronization model so
+ * every modification to this function must be carefully reviewed.
*/
- close(sock);
+ ret = close(sock);
+ if (ret) {
+ PERROR("close");
+ }
+ lttng_fd_put(LTTNG_FD_APPS, 1);
- DBG2("UST app pid %d deleted", app->key.pid);
+ DBG2("UST app pid %d deleted", app->pid);
free(app);
rcu_read_unlock();
struct lttng_ht_node_ulong *node =
caa_container_of(head, struct lttng_ht_node_ulong, head);
struct ust_app *app =
- caa_container_of(node, struct ust_app, node);
+ caa_container_of(node, struct ust_app, pid_n);
- DBG3("Call RCU deleting app PID %d", app->key.pid);
+ DBG3("Call RCU deleting app PID %d", app->pid);
delete_ust_app(app);
}
struct ust_app *find_app_by_sock(int sock)
{
struct lttng_ht_node_ulong *node;
- struct ust_app_key *key;
struct lttng_ht_iter iter;
- lttng_ht_lookup(ust_app_sock_key_map, (void *)((unsigned long) sock),
- &iter);
- node = lttng_ht_iter_get_node_ulong(&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);
-
- lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) key->pid), &iter);
+ lttng_ht_lookup(ust_app_ht_by_sock, (void *)((unsigned long) sock), &iter);
node = lttng_ht_iter_get_node_ulong(&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);
+
+ return caa_container_of(node, struct ust_app, sock_n);
error:
return NULL;
{
int ret;
- ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx,
+ health_code_update(&health_thread_cmd);
+
+ ret = ustctl_add_context(app->sock, &ua_ctx->ctx,
ua_chan->obj, &ua_ctx->obj);
if (ret < 0) {
goto error;
ua_ctx->handle = ua_ctx->obj->handle;
- DBG2("UST app context added to channel %s successfully", ua_chan->name);
+ DBG2("UST app context created successfully for channel %s", ua_chan->name);
error:
+ health_code_update(&health_thread_cmd);
return ret;
}
{
int ret;
- ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx,
+ health_code_update(&health_thread_cmd);
+
+ ret = ustctl_add_context(app->sock, &ua_ctx->ctx,
ua_event->obj, &ua_ctx->obj);
if (ret < 0) {
goto error;
ua_ctx->handle = ua_ctx->obj->handle;
- DBG2("UST app context added to event %s successfully", ua_event->name);
+ DBG2("UST app context created successfully for event %s", ua_event->name);
error:
+ health_code_update(&health_thread_cmd);
+ return ret;
+}
+
+/*
+ * Set the filter on the tracer.
+ */
+static
+int set_ust_event_filter(struct ust_app_event *ua_event,
+ struct ust_app *app)
+{
+ int ret;
+
+ health_code_update(&health_thread_cmd);
+
+ if (!ua_event->filter) {
+ ret = 0;
+ goto error;
+ }
+
+ ret = ustctl_set_filter(app->sock, ua_event->filter,
+ ua_event->obj);
+ if (ret < 0) {
+ goto error;
+ }
+
+ DBG2("UST filter set successfully for event %s", ua_event->name);
+
+error:
+ health_code_update(&health_thread_cmd);
return ret;
}
{
int ret;
- ret = ustctl_disable(app->key.sock, ua_event->obj);
+ health_code_update(&health_thread_cmd);
+
+ ret = ustctl_disable(app->sock, ua_event->obj);
if (ret < 0) {
ERR("UST app event %s disable failed for app (pid: %d) "
"and session handle %d with ret %d",
- ua_event->attr.name, app->key.pid, ua_sess->handle, ret);
+ ua_event->attr.name, app->pid, ua_sess->handle, ret);
goto error;
}
DBG2("UST app event %s disabled successfully for app (pid: %d)",
- ua_event->attr.name, app->key.pid);
+ ua_event->attr.name, app->pid);
error:
+ health_code_update(&health_thread_cmd);
return ret;
}
{
int ret;
- ret = ustctl_disable(app->key.sock, ua_chan->obj);
+ health_code_update(&health_thread_cmd);
+
+ ret = ustctl_disable(app->sock, ua_chan->obj);
if (ret < 0) {
ERR("UST app channel %s disable failed for app (pid: %d) "
"and session handle %d with ret %d",
- ua_chan->name, app->key.pid, ua_sess->handle, ret);
+ ua_chan->name, app->pid, ua_sess->handle, ret);
goto error;
}
DBG2("UST app channel %s disabled successfully for app (pid: %d)",
- ua_chan->name, app->key.pid);
+ ua_chan->name, app->pid);
error:
+ health_code_update(&health_thread_cmd);
return ret;
}
{
int ret;
- ret = ustctl_enable(app->key.sock, ua_chan->obj);
+ health_code_update(&health_thread_cmd);
+
+ ret = ustctl_enable(app->sock, ua_chan->obj);
if (ret < 0) {
ERR("UST app channel %s enable failed for app (pid: %d) "
"and session handle %d with ret %d",
- ua_chan->name, app->key.pid, ua_sess->handle, ret);
+ ua_chan->name, app->pid, ua_sess->handle, ret);
goto error;
}
ua_chan->enabled = 1;
DBG2("UST app channel %s enabled successfully for app (pid: %d)",
- ua_chan->name, app->key.pid);
+ ua_chan->name, app->pid);
error:
+ health_code_update(&health_thread_cmd);
return ret;
}
{
int ret;
- ret = ustctl_enable(app->key.sock, ua_event->obj);
+ health_code_update(&health_thread_cmd);
+
+ ret = ustctl_enable(app->sock, ua_event->obj);
if (ret < 0) {
ERR("UST app event %s enable failed for app (pid: %d) "
"and session handle %d with ret %d",
- ua_event->attr.name, app->key.pid, ua_sess->handle, ret);
+ ua_event->attr.name, app->pid, ua_sess->handle, ret);
goto error;
}
DBG2("UST app event %s enabled successfully for app (pid: %d)",
- ua_event->attr.name, app->key.pid);
+ ua_event->attr.name, app->pid);
error:
+ health_code_update(&health_thread_cmd);
return ret;
}
int ret;
struct lttng_ust_channel_attr uattr;
+ health_code_update(&health_thread_cmd);
+
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;
ua_sess->metadata->attr.read_timer_interval;
uattr.output = ua_sess->metadata->attr.output;
+ /* We are going to receive 2 fds, we need to reserve them. */
+ ret = lttng_fd_get(LTTNG_FD_APPS, 2);
+ if (ret < 0) {
+ ERR("Exhausted number of available FD upon metadata open");
+ goto error;
+ }
/* UST tracer metadata creation */
- ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr,
+ ret = ustctl_open_metadata(app->sock, ua_sess->handle, &uattr,
&ua_sess->metadata->obj);
if (ret < 0) {
ERR("UST app open metadata failed for app pid:%d with ret %d",
- app->key.pid, ret);
+ app->pid, ret);
goto error;
}
ua_sess->metadata->handle = ua_sess->metadata->obj->handle;
error:
+ health_code_update(&health_thread_cmd);
return ret;
}
{
int ret;
- ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj,
+ health_code_update(&health_thread_cmd);
+
+ /* We are going to receive 2 fds, we need to reserve them. */
+ ret = lttng_fd_get(LTTNG_FD_APPS, 2);
+ if (ret < 0) {
+ ERR("Exhausted number of available FD upon metadata stream create");
+ goto error;
+ }
+ ret = ustctl_create_stream(app->sock, ua_sess->metadata->obj,
&ua_sess->metadata->stream_obj);
if (ret < 0) {
ERR("UST create metadata stream failed");
}
error:
+ health_code_update(&health_thread_cmd);
return ret;
}
{
int ret;
+ health_code_update(&health_thread_cmd);
+
/* TODO: remove cast and use lttng-ust-abi.h */
- ret = ustctl_create_channel(app->key.sock, ua_sess->handle,
+
+ /* We are going to receive 2 fds, we need to reserve them. */
+ ret = lttng_fd_get(LTTNG_FD_APPS, 2);
+ if (ret < 0) {
+ ERR("Exhausted number of available FD upon create channel");
+ goto error;
+ }
+
+ health_code_update(&health_thread_cmd);
+
+ ret = ustctl_create_channel(app->sock, ua_sess->handle,
(struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj);
if (ret < 0) {
ERR("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_chan->name, app->pid, app->sock,
ua_sess->handle, ret);
+ lttng_fd_put(LTTNG_FD_APPS, 2);
goto error;
}
ua_chan->handle = ua_chan->obj->handle;
DBG2("UST app channel %s created successfully for pid:%d and sock:%d",
- ua_chan->name, app->key.pid, app->key.sock);
+ ua_chan->name, app->pid, app->sock);
+
+ health_code_update(&health_thread_cmd);
/* If channel is not enabled, disable it on the tracer */
if (!ua_chan->enabled) {
}
error:
+ health_code_update(&health_thread_cmd);
return ret;
}
{
int ret = 0;
+ health_code_update(&health_thread_cmd);
+
/* Create UST event on tracer */
- ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj,
+ ret = ustctl_create_event(app->sock, &ua_event->attr, ua_chan->obj,
&ua_event->obj);
if (ret < 0) {
- if (ret == -EEXIST) {
- ret = 0;
- goto error;
- }
ERR("Error ustctl create event %s for app pid: %d with ret %d",
- ua_event->attr.name, app->key.pid, ret);
+ ua_event->attr.name, app->pid, ret);
goto error;
}
ua_event->handle = ua_event->obj->handle;
DBG2("UST app event %s created successfully for pid:%d",
- ua_event->attr.name, app->key.pid);
+ ua_event->attr.name, app->pid);
+
+ health_code_update(&health_thread_cmd);
/* If event not enabled, disable it on the tracer */
if (ua_event->enabled == 0) {
* just created it.
*/
switch (ret) {
- case -EPERM:
+ case -LTTNG_UST_ERR_PERM:
/* Code flow problem */
assert(0);
- case -EEXIST:
+ case -LTTNG_UST_ERR_EXIST:
/* It's OK for our use case. */
ret = 0;
break;
}
error:
+ health_code_update(&health_thread_cmd);
return ret;
}
/* Copy event attributes */
memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr));
+ /* Copy filter bytecode */
+ if (uevent->filter) {
+ ua_event->filter = zmalloc(sizeof(*ua_event->filter) +
+ uevent->filter->len);
+ if (!ua_event->filter) {
+ return;
+ }
+ memcpy(ua_event->filter, uevent->filter,
+ sizeof(*ua_event->filter) + uevent->filter->len);
+ }
cds_lfht_for_each_entry(uevent->ctx->ht, &iter.iter, uctx, node.node) {
ua_ctx = alloc_ust_app_ctx(&uctx->ctx);
if (ua_ctx == NULL) {
ua_sess->uid = usess->uid;
ua_sess->gid = usess->gid;
- ret = snprintf(ua_sess->path, PATH_MAX, "%s/%s-%d-%s", usess->pathname,
- app->name, app->key.pid, datetime);
+ ret = snprintf(ua_sess->path, PATH_MAX, "%s-%d-%s/", app->name, app->pid,
+ datetime);
if (ret < 0) {
PERROR("asprintf UST shadow copy session");
/* TODO: We cannot return an error from here.. */
int ret;
struct ust_app_session *ua_sess;
+ health_code_update(&health_thread_cmd);
+
ua_sess = lookup_session_by_app(usess, app);
if (ua_sess == NULL) {
DBG2("UST app pid: %d session id %d not found, creating it",
- app->key.pid, usess->id);
+ app->pid, usess->id);
ua_sess = alloc_ust_app_session();
if (ua_sess == NULL) {
/* Only malloc can failed so something is really wrong */
shadow_copy_session(ua_sess, usess, app);
}
+ health_code_update(&health_thread_cmd);
+
if (ua_sess->handle == -1) {
- ret = ustctl_create_session(app->key.sock);
+ ret = ustctl_create_session(app->sock);
if (ret < 0) {
- ERR("Creating session for app pid %d", app->key.pid);
- goto error;
+ ERR("Creating session for app pid %d", app->pid);
+ delete_ust_app_session(-1, ua_sess);
+ /* This means that the tracer is gone... */
+ ua_sess = (void*) -1UL;
+ goto end;
}
ua_sess->handle = ret;
}
end:
+ health_code_update(&health_thread_cmd);
return ua_sess;
-
-error:
- delete_ust_app_session(-1, ua_sess);
- return NULL;
}
/*
return ret;
}
+/*
+ * Set UST filter for the event on the tracer.
+ */
+static
+int set_ust_app_event_filter(struct ust_app_session *ua_sess,
+ struct ust_app_event *ua_event,
+ struct lttng_filter_bytecode *bytecode,
+ struct ust_app *app)
+{
+ int ret = 0;
+
+ DBG2("UST app adding context to event %s", ua_event->name);
+
+ /* Copy filter bytecode */
+ ua_event->filter = zmalloc(sizeof(*ua_event->filter) + bytecode->len);
+ if (!ua_event->filter) {
+ return -ENOMEM;
+ }
+ memcpy(ua_event->filter, bytecode,
+ sizeof(*ua_event->filter) + bytecode->len);
+ ret = set_ust_event_filter(ua_event, app);
+ if (ret < 0) {
+ goto error;
+ }
+
+error:
+ return ret;
+}
+
/*
* Enable on the tracer side a ust app event for the session and channel.
*/
ret = create_ust_channel(app, ua_sess, ua_chan);
if (ret < 0) {
/* Not found previously means that it does not exist on the tracer */
- assert(ret != -EEXIST);
+ assert(ret != -LTTNG_UST_ERR_EXIST);
goto error;
}
lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node);
DBG2("UST app create channel %s for PID %d completed", ua_chan->name,
- app->key.pid);
+ app->pid);
end:
return ua_chan;
ret = create_ust_event(app, ua_sess, ua_chan, ua_event);
if (ret < 0) {
/* Not found previously means that it does not exist on the tracer */
- assert(ret != -EEXIST);
+ assert(ret != -LTTNG_UST_ERR_EXIST);
goto error;
}
lttng_ht_add_unique_str(ua_chan->events, &ua_event->node);
DBG2("UST app create event %s for PID %d completed", ua_event->name,
- app->key.pid);
+ app->pid);
end:
return ret;
goto error;
}
- DBG2("UST metadata opened for app pid %d", app->key.pid);
+ DBG2("UST metadata opened for app pid %d", app->pid);
}
/* Open UST metadata stream */
goto error;
}
- ret = run_as_mkdir(ua_sess->path, S_IRWXU | S_IRWXG,
- ua_sess->uid, ua_sess->gid);
- if (ret < 0) {
- PERROR("mkdir UST metadata");
- goto error;
- }
-
ret = snprintf(ua_sess->metadata->pathname, PATH_MAX,
"%s/metadata", ua_sess->path);
if (ret < 0) {
}
DBG2("UST metadata stream object created for app pid %d",
- app->key.pid);
+ app->pid);
} else {
ERR("Attempting to create stream without metadata opened");
goto error;
DBG2("Found UST app by pid %d", pid);
- return caa_container_of(node, struct ust_app, node);
+ return caa_container_of(node, struct ust_app, pid_n);
error:
rcu_read_unlock();
int ust_app_register(struct ust_register_msg *msg, int sock)
{
struct ust_app *lta;
+ int ret;
- if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL)
- || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) {
+ if ((msg->bits_per_long == 64 &&
+ (uatomic_read(&ust_consumerd64_fd) == -EINVAL))
+ || (msg->bits_per_long == 32 &&
+ (uatomic_read(&ust_consumerd32_fd) == -EINVAL))) {
ERR("Registration failed: application \"%s\" (pid: %d) has "
"%d-bit long, but no consumerd for this long size is available.\n",
msg->name, msg->pid, msg->bits_per_long);
- close(sock);
+ ret = close(sock);
+ if (ret) {
+ PERROR("close");
+ }
+ lttng_fd_put(LTTNG_FD_APPS, 1);
+ return -EINVAL;
+ }
+ if (msg->major != LTTNG_UST_COMM_MAJOR) {
+ ERR("Registration failed: application \"%s\" (pid: %d) has "
+ "communication protocol version %u.%u, but sessiond supports 2.x.\n",
+ msg->name, msg->pid, msg->major, msg->minor);
+ ret = close(sock);
+ if (ret) {
+ PERROR("close");
+ }
+ lttng_fd_put(LTTNG_FD_APPS, 1);
return -EINVAL;
}
lta = zmalloc(sizeof(struct ust_app));
lta->name[16] = '\0';
lta->sessions = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
- /* Set key map */
- lta->key.pid = msg->pid;
- lttng_ht_node_init_ulong(<a->node, (unsigned long)lta->key.pid);
- lta->key.sock = sock;
- lttng_ht_node_init_ulong(<a->key.node, (unsigned long)lta->key.sock);
+ lta->pid = msg->pid;
+ lttng_ht_node_init_ulong(<a->pid_n, (unsigned long)lta->pid);
+ lta->sock = sock;
+ lttng_ht_node_init_ulong(<a->sock_n, (unsigned long)lta->sock);
rcu_read_lock();
- lttng_ht_add_unique_ulong(ust_app_sock_key_map, <a->key.node);
- lttng_ht_add_unique_ulong(ust_app_ht, <a->node);
+
+ /*
+ * On a re-registration, we want to kick out the previous registration of
+ * that pid
+ */
+ lttng_ht_add_replace_ulong(ust_app_ht, <a->pid_n);
+
+ /*
+ * The socket _should_ be unique until _we_ call close. So, a add_unique
+ * for the ust_app_ht_by_sock is used which asserts fail if the entry was
+ * already in the table.
+ */
+ lttng_ht_add_unique_ulong(ust_app_ht_by_sock, <a->sock_n);
+
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);
+ " (version %d.%d)", lta->pid, lta->ppid, lta->uid, lta->gid,
+ lta->sock, lta->name, lta->v_major, lta->v_minor);
return 0;
}
int ret;
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);
-
- /* Remove application from socket hash table */
- lttng_ht_lookup(ust_app_sock_key_map, (void *)((unsigned long) sock), &iter);
- ret = lttng_ht_del(ust_app_sock_key_map, &iter);
- assert(!ret);
/* Get the node reference for a call_rcu */
- lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) lta->key.pid), &iter);
+ lttng_ht_lookup(ust_app_ht_by_sock, (void *)((unsigned long) sock), &iter);
node = lttng_ht_iter_get_node_ulong(&iter);
if (node == NULL) {
- ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid);
+ ERR("Unable to find app by sock %d", sock);
goto error;
}
+ lta = caa_container_of(node, struct ust_app, sock_n);
+
+ DBG("PID %d unregistering with sock %d", lta->pid, sock);
+
/* Remove application from PID hash table */
- ret = lttng_ht_del(ust_app_ht, &iter);
+ ret = lttng_ht_del(ust_app_ht_by_sock, &iter);
assert(!ret);
- call_rcu(&node->head, delete_ust_app_rcu);
+
+ /* Assign second node for deletion */
+ iter.iter.node = <a->pid_n.node;
+
+ /*
+ * Ignore return value since the node might have been removed before by an
+ * add replace during app registration because the PID can be reassigned by
+ * the OS.
+ */
+ ret = lttng_ht_del(ust_app_ht, &iter);
+ if (ret) {
+ DBG3("Unregister app by PID %d failed. This can happen on pid reuse",
+ lta->pid);
+ }
+
+ /* Free memory */
+ call_rcu(<a->pid_n.head, delete_ust_app_rcu);
+
error:
rcu_read_unlock();
return;
rcu_read_lock();
- cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) {
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
struct lttng_ust_tracepoint_iter uiter;
+ health_code_update(&health_thread_cmd);
+
if (!app->compatible) {
/*
* TODO: In time, we should notice the caller of this error by
*/
continue;
}
- handle = ustctl_tracepoint_list(app->key.sock);
+ handle = ustctl_tracepoint_list(app->sock);
if (handle < 0) {
ERR("UST app list events getting handle failed for app pid %d",
- app->key.pid);
+ app->pid);
continue;
}
- while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle,
- &uiter)) != -ENOENT) {
+ while ((ret = ustctl_tracepoint_list_get(app->sock, handle,
+ &uiter)) != -LTTNG_UST_ERR_NOENT) {
+ health_code_update(&health_thread_cmd);
if (count >= nbmem) {
+ /* In case the realloc fails, we free the memory */
+ void *tmp_ptr = (void *) tmp;
DBG2("Reallocating event list from %zu to %zu entries", nbmem,
2 * nbmem);
nbmem *= 2;
tmp = realloc(tmp, nbmem * sizeof(struct lttng_event));
if (tmp == NULL) {
PERROR("realloc ust app events");
+ free(tmp_ptr);
ret = -ENOMEM;
goto rcu_error;
}
}
memcpy(tmp[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN);
- memcpy(tmp[count].loglevel, uiter.loglevel, LTTNG_UST_SYM_NAME_LEN);
- tmp[count].loglevel_value = uiter.loglevel_value;
- tmp[count].type = LTTNG_UST_TRACEPOINT;
- tmp[count].pid = app->key.pid;
+ tmp[count].loglevel = uiter.loglevel;
+ tmp[count].type = (enum lttng_event_type) LTTNG_UST_TRACEPOINT;
+ tmp[count].pid = app->pid;
tmp[count].enabled = -1;
count++;
}
rcu_error:
rcu_read_unlock();
error:
+ health_code_update(&health_thread_cmd);
+ return ret;
+}
+
+/*
+ * Fill events array with all events name of all registered apps.
+ */
+int ust_app_list_event_fields(struct lttng_event_field **fields)
+{
+ int ret, handle;
+ size_t nbmem, count = 0;
+ struct lttng_ht_iter iter;
+ struct ust_app *app;
+ struct lttng_event_field *tmp;
+
+ nbmem = UST_APP_EVENT_LIST_SIZE;
+ tmp = zmalloc(nbmem * sizeof(struct lttng_event_field));
+ if (tmp == NULL) {
+ PERROR("zmalloc ust app event fields");
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ rcu_read_lock();
+
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
+ struct lttng_ust_field_iter uiter;
+
+ health_code_update(&health_thread_cmd);
+
+ if (!app->compatible) {
+ /*
+ * TODO: In time, we should notice the caller of this error by
+ * telling him that this is a version error.
+ */
+ continue;
+ }
+ handle = ustctl_tracepoint_field_list(app->sock);
+ if (handle < 0) {
+ ERR("UST app list event fields getting handle failed for app pid %d",
+ app->pid);
+ continue;
+ }
+
+ while ((ret = ustctl_tracepoint_field_list_get(app->sock, handle,
+ &uiter)) != -LTTNG_UST_ERR_NOENT) {
+ health_code_update(&health_thread_cmd);
+ if (count >= nbmem) {
+ /* In case the realloc fails, we free the memory */
+ void *tmp_ptr = (void *) tmp;
+ DBG2("Reallocating event field list from %zu to %zu entries", nbmem,
+ 2 * nbmem);
+ nbmem *= 2;
+ tmp = realloc(tmp, nbmem * sizeof(struct lttng_event_field));
+ if (tmp == NULL) {
+ PERROR("realloc ust app event fields");
+ free(tmp_ptr);
+ ret = -ENOMEM;
+ goto rcu_error;
+ }
+ }
+
+ memcpy(tmp[count].field_name, uiter.field_name, LTTNG_UST_SYM_NAME_LEN);
+ tmp[count].type = uiter.type;
+ tmp[count].nowrite = uiter.nowrite;
+
+ memcpy(tmp[count].event.name, uiter.event_name, LTTNG_UST_SYM_NAME_LEN);
+ tmp[count].event.loglevel = uiter.loglevel;
+ tmp[count].event.type = LTTNG_UST_TRACEPOINT;
+ tmp[count].event.pid = app->pid;
+ tmp[count].event.enabled = -1;
+ count++;
+ }
+ }
+
+ ret = count;
+ *fields = tmp;
+
+ DBG2("UST app list event fields done (%zu events)", count);
+
+rcu_error:
+ rcu_read_unlock();
+error:
+ health_code_update(&health_thread_cmd);
return ret;
}
void ust_app_clean_list(void)
{
int ret;
+ struct ust_app *app;
struct lttng_ht_iter iter;
- struct lttng_ht_node_ulong *node;
DBG2("UST app cleaning registered apps hash table");
rcu_read_lock();
- cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, node, node) {
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
ret = lttng_ht_del(ust_app_ht, &iter);
assert(!ret);
- call_rcu(&node->head, delete_ust_app_rcu);
+ call_rcu(&app->pid_n.head, delete_ust_app_rcu);
}
- /* Destroy is done only when the ht is empty */
- lttng_ht_destroy(ust_app_ht);
- cds_lfht_for_each_entry(ust_app_sock_key_map->ht, &iter.iter, node, node) {
- ret = lttng_ht_del(ust_app_sock_key_map, &iter);
+ /* Cleanup socket hash table */
+ cds_lfht_for_each_entry(ust_app_ht_by_sock->ht, &iter.iter, app,
+ sock_n.node) {
+ ret = lttng_ht_del(ust_app_ht_by_sock, &iter);
assert(!ret);
}
+
/* Destroy is done only when the ht is empty */
- lttng_ht_destroy(ust_app_sock_key_map);
+ lttng_ht_destroy(ust_app_ht);
+ lttng_ht_destroy(ust_app_ht_by_sock);
rcu_read_unlock();
}
void ust_app_ht_alloc(void)
{
ust_app_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
- ust_app_sock_key_map = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
+ ust_app_ht_by_sock = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
}
/*
rcu_read_lock();
/* For every registered applications */
- cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) {
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
struct lttng_ht_iter uiter;
if (!app->compatible) {
/*
rcu_read_lock();
/* For every registered applications */
- cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) {
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
if (!app->compatible) {
/*
* TODO: In time, we should notice the caller of this error by
rcu_read_lock();
/* For all registered applications */
- cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) {
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
if (!app->compatible) {
/*
* TODO: In time, we should notice the caller of this error by
ua_chan_node = lttng_ht_iter_get_node_str(&uiter);
if (ua_chan_node == NULL) {
DBG2("Channel %s not found in session id %d for app pid %d."
- "Skipping", uchan->name, usess->id, app->key.pid);
+ "Skipping", uchan->name, usess->id, app->pid);
continue;
}
ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node);
ua_event_node = lttng_ht_iter_get_node_str(&uiter);
if (ua_event_node == NULL) {
DBG2("Event %s not found in channel %s for app pid %d."
- "Skipping", uevent->attr.name, uchan->name, app->key.pid);
+ "Skipping", uevent->attr.name, uchan->name, app->pid);
continue;
}
ua_event = caa_container_of(ua_event_node, struct ust_app_event, node);
rcu_read_lock();
/* For all registered applications */
- cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) {
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
if (!app->compatible) {
/*
* TODO: In time, we should notice the caller of this error by
int ust_app_create_channel_glb(struct ltt_ust_session *usess,
struct ltt_ust_channel *uchan)
{
+ int ret = 0;
struct lttng_ht_iter iter;
struct ust_app *app;
struct ust_app_session *ua_sess;
rcu_read_lock();
/* For every registered applications */
- cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) {
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
if (!app->compatible) {
/*
* TODO: In time, we should notice the caller of this error by
*/
ua_sess = create_ust_app_session(usess, app);
if (ua_sess == NULL) {
- /* Major problem here and it's maybe the tracer or malloc() */
+ /* The malloc() failed. */
+ ret = -1;
goto error;
+ } else if (ua_sess == (void *) -1UL) {
+ /* The application's socket is not valid. Contiuing */
+ ret = -1;
+ continue;
}
/* Create channel onto application */
ua_chan = create_ust_app_channel(ua_sess, uchan, app);
if (ua_chan == NULL) {
/* Major problem here and it's maybe the tracer or malloc() */
+ ret = -1;
goto error;
}
}
rcu_read_unlock();
- return 0;
-
error:
- return -1;
+ return ret;
}
/*
rcu_read_lock();
/* For all registered applications */
- cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) {
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
if (!app->compatible) {
/*
* TODO: In time, we should notice the caller of this error by
ua_event_node = lttng_ht_iter_get_node_str(&uiter);
if (ua_event_node == NULL) {
DBG3("UST app enable event %s not found for app PID %d."
- "Skipping app", uevent->attr.name, app->key.pid);
+ "Skipping app", uevent->attr.name, app->pid);
continue;
}
ua_event = caa_container_of(ua_event_node, struct ust_app_event, node);
rcu_read_lock();
/* For all registered applications */
- cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) {
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
if (!app->compatible) {
/*
* TODO: In time, we should notice the caller of this error by
ret = create_ust_app_event(ua_sess, ua_chan, uevent, app);
if (ret < 0) {
- if (ret != -EEXIST) {
+ if (ret != -LTTNG_UST_ERR_EXIST) {
/* Possible value at this point: -ENOMEM. If so, we stop! */
break;
}
DBG2("UST app event %s already exist on app PID %d",
- uevent->attr.name, app->key.pid);
+ uevent->attr.name, app->pid);
continue;
}
}
struct ust_app_session *ua_sess;
struct ust_app_channel *ua_chan;
struct ltt_ust_stream *ustream;
- int consumerd_fd;
+ struct consumer_socket *socket;
- DBG("Starting tracing for ust app pid %d", app->key.pid);
+ DBG("Starting tracing for ust app pid %d", app->pid);
rcu_read_lock();
goto skip_setup;
}
+ /* Create directories if consumer is LOCAL and has a path defined. */
+ if (usess->consumer->type == CONSUMER_DST_LOCAL &&
+ strlen(usess->consumer->dst.trace_path) > 0) {
+ ret = run_as_mkdir_recursive(usess->consumer->dst.trace_path,
+ S_IRWXU | S_IRWXG, usess->uid, usess->gid);
+ if (ret < 0) {
+ if (ret != -EEXIST) {
+ ERR("Trace directory creation error");
+ ret = -1;
+ goto error_rcu_unlock;
+ }
+ }
+ }
+
+ /* Indicate that the session has been started once */
+ ua_sess->started = 1;
+
ret = create_ust_app_metadata(ua_sess, usess->pathname, app);
if (ret < 0) {
+ ret = LTTNG_ERR_UST_META_FAIL;
goto error_rcu_unlock;
}
goto error_rcu_unlock;
}
- ret = ustctl_create_stream(app->key.sock, ua_chan->obj,
+ /* We are going to receive 2 fds, we need to reserve them. */
+ ret = lttng_fd_get(LTTNG_FD_APPS, 2);
+ if (ret < 0) {
+ ERR("Exhausted number of available FD upon stream create");
+ free(ustream);
+ goto error_rcu_unlock;
+ }
+
+ health_code_update(&health_thread_cmd);
+
+ ret = ustctl_create_stream(app->sock, ua_chan->obj,
&ustream->obj);
if (ret < 0) {
/* Got all streams */
+ lttng_fd_put(LTTNG_FD_APPS, 2);
+ free(ustream);
+ ret = LTTNG_ERR_UST_STREAM_FAIL;
break;
}
ustream->handle = ustream->obj->handle;
+ health_code_update(&health_thread_cmd);
+
/* Order is important */
cds_list_add_tail(&ustream->list, &ua_chan->streams.head);
- ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u",
- ua_sess->path, ua_chan->name,
- ua_chan->streams.count++);
+ ret = snprintf(ustream->name, sizeof(ustream->name), "%s_%u",
+ ua_chan->name, ua_chan->streams.count);
+ ua_chan->streams.count++;
if (ret < 0) {
PERROR("asprintf UST create stream");
+ /*
+ * XXX what should we do here with the
+ * stream ?
+ */
continue;
}
- DBG2("UST stream %d ready at %s", ua_chan->streams.count,
- ustream->pathname);
+ DBG2("UST stream %d ready (handle: %d)", ua_chan->streams.count,
+ ustream->handle);
}
+
+ health_code_update(&health_thread_cmd);
}
switch (app->bits_per_long) {
case 64:
- consumerd_fd = ust_consumerd64_fd;
+ socket = consumer_find_socket(uatomic_read(&ust_consumerd64_fd),
+ usess->consumer);
+ if (socket == NULL) {
+ goto skip_setup;
+ }
break;
case 32:
- consumerd_fd = ust_consumerd32_fd;
+ socket = consumer_find_socket(uatomic_read(&ust_consumerd32_fd),
+ usess->consumer);
+ if (socket == NULL) {
+ goto skip_setup;
+ }
break;
default:
ret = -EINVAL;
}
/* Setup UST consumer socket and send fds to it */
- ret = ust_consumer_send_session(consumerd_fd, ua_sess);
+ ret = ust_consumer_send_session(ua_sess, usess->consumer, socket);
if (ret < 0) {
goto error_rcu_unlock;
}
- ua_sess->started = 1;
+
+ health_code_update(&health_thread_cmd);
skip_setup:
/* This start the UST tracing */
- ret = ustctl_start_session(app->key.sock, ua_sess->handle);
+ ret = ustctl_start_session(app->sock, ua_sess->handle);
if (ret < 0) {
- ERR("Error starting tracing for app pid: %d", app->key.pid);
+ ERR("Error starting tracing for app pid: %d", app->pid);
goto error_rcu_unlock;
}
+ health_code_update(&health_thread_cmd);
+
/* Quiescent wait after starting trace */
- ustctl_wait_quiescent(app->key.sock);
+ ustctl_wait_quiescent(app->sock);
end:
rcu_read_unlock();
+ health_code_update(&health_thread_cmd);
return 0;
error_rcu_unlock:
rcu_read_unlock();
+ health_code_update(&health_thread_cmd);
return -1;
}
struct ust_app_session *ua_sess;
struct ust_app_channel *ua_chan;
- DBG("Stopping tracing for ust app pid %d", app->key.pid);
+ DBG("Stopping tracing for ust app pid %d", app->pid);
rcu_read_lock();
goto error_rcu_unlock;
}
- /* Not started, continuing. */
- if (ua_sess->started == 0) {
- goto end;
- }
+ /*
+ * If started = 0, it means that stop trace has been called for a session
+ * that was never started. This is a code flow error and should never
+ * happen.
+ */
+ assert(ua_sess->started == 1);
+
+ health_code_update(&health_thread_cmd);
/* This inhibits UST tracing */
- ret = ustctl_stop_session(app->key.sock, ua_sess->handle);
+ ret = ustctl_stop_session(app->sock, ua_sess->handle);
if (ret < 0) {
- ERR("Error stopping tracing for app pid: %d", app->key.pid);
+ ERR("Error stopping tracing for app pid: %d", app->pid);
goto error_rcu_unlock;
}
+ health_code_update(&health_thread_cmd);
+
/* Quiescent wait after stopping trace */
- ustctl_wait_quiescent(app->key.sock);
+ ustctl_wait_quiescent(app->sock);
+
+ health_code_update(&health_thread_cmd);
/* Flushing buffers */
cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan,
node.node) {
- ret = ustctl_sock_flush_buffer(app->key.sock, ua_chan->obj);
+ health_code_update(&health_thread_cmd);
+ ret = ustctl_sock_flush_buffer(app->sock, ua_chan->obj);
if (ret < 0) {
ERR("UST app PID %d channel %s flush failed with ret %d",
- app->key.pid, ua_chan->name, ret);
+ app->pid, ua_chan->name, ret);
/* Continuing flushing all buffers */
continue;
}
}
+ health_code_update(&health_thread_cmd);
+
/* Flush all buffers before stopping */
- ret = ustctl_sock_flush_buffer(app->key.sock, ua_sess->metadata->obj);
+ ret = ustctl_sock_flush_buffer(app->sock, ua_sess->metadata->obj);
if (ret < 0) {
- ERR("UST app PID %d metadata flush failed with ret %d", app->key.pid,
+ ERR("UST app PID %d metadata flush failed with ret %d", app->pid,
ret);
}
- ua_sess->started = 0;
-
end:
rcu_read_unlock();
+ health_code_update(&health_thread_cmd);
return 0;
error_rcu_unlock:
rcu_read_unlock();
+ health_code_update(&health_thread_cmd);
return -1;
}
struct lttng_ht_node_ulong *node;
int ret;
- DBG("Destroy tracing for ust app pid %d", app->key.pid);
+ DBG("Destroy tracing for ust app pid %d", app->pid);
rcu_read_lock();
obj.shm_fd = -1;
obj.wait_fd = -1;
obj.memory_map_size = 0;
- ustctl_release_object(app->key.sock, &obj);
+ health_code_update(&health_thread_cmd);
+ ustctl_release_object(app->sock, &obj);
- delete_ust_app_session(app->key.sock, ua_sess);
+ health_code_update(&health_thread_cmd);
+ delete_ust_app_session(app->sock, ua_sess);
/* Quiescent wait after stopping trace */
- ustctl_wait_quiescent(app->key.sock);
+ ustctl_wait_quiescent(app->sock);
end:
rcu_read_unlock();
+ health_code_update(&health_thread_cmd);
return 0;
error_rcu_unlock:
rcu_read_unlock();
+ health_code_update(&health_thread_cmd);
return -1;
}
rcu_read_lock();
- cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) {
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
ret = ust_app_start_trace(usess, app);
if (ret < 0) {
/* Continue to next apps even on error */
rcu_read_lock();
- cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) {
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
ret = ust_app_stop_trace(usess, app);
if (ret < 0) {
/* Continue to next apps even on error */
rcu_read_lock();
- cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) {
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
ret = ust_app_destroy_trace(usess, app);
if (ret < 0) {
/* Continue to next apps even on error */
void ust_app_global_update(struct ltt_ust_session *usess, int sock)
{
int ret = 0;
- struct lttng_ht_iter iter, uiter;
+ struct lttng_ht_iter iter, uiter, iter_ctx;
struct ust_app *app;
struct ust_app_session *ua_sess;
struct ust_app_channel *ua_chan;
struct ust_app_event *ua_event;
+ struct ust_app_ctx *ua_ctx;
if (usess == NULL) {
ERR("No UST session on global update. Returning");
}
ua_sess = create_ust_app_session(usess, app);
- if (ua_sess == NULL) {
+ if (ua_sess == NULL || ua_sess == (void *) -1UL) {
+ /* Tracer is gone for this session and has been freed */
goto error;
}
continue;
}
+ cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter_ctx.iter, ua_ctx,
+ node.node) {
+ ret = create_ust_channel_context(ua_chan, ua_ctx, app);
+ if (ret < 0) {
+ /* FIXME: Should we quit here or continue... */
+ continue;
+ }
+ }
+
+
/* For each events */
cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event,
node.node) {
/* FIXME: Should we quit here or continue... */
continue;
}
+
+ /* Add context on events. */
+ cds_lfht_for_each_entry(ua_event->ctx->ht, &iter_ctx.iter,
+ ua_ctx, node.node) {
+ ret = create_ust_event_context(ua_event, ua_ctx, app);
+ if (ret < 0) {
+ /* FIXME: Should we quit here or continue... */
+ continue;
+ }
+ }
+ ret = set_ust_event_filter(ua_event, app);
+ if (ret < 0) {
+ /* FIXME: Should we quit here or continue... */
+ continue;
+ }
}
}
goto error;
}
- DBG2("UST trace started for app pid %d", app->key.pid);
+ DBG2("UST trace started for app pid %d", app->pid);
}
error:
rcu_read_lock();
- cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) {
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
if (!app->compatible) {
/*
* TODO: In time, we should notice the caller of this error by
rcu_read_lock();
- cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) {
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
if (!app->compatible) {
/*
* TODO: In time, we should notice the caller of this error by
return ret;
}
+/*
+ * Add context to a specific event in a channel for global UST domain.
+ */
+int ust_app_set_filter_event_glb(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
+ struct lttng_filter_bytecode *bytecode)
+{
+ int ret = 0;
+ struct lttng_ht_node_str *ua_chan_node, *ua_event_node;
+ struct lttng_ht_iter iter, uiter;
+ struct ust_app_session *ua_sess;
+ struct ust_app_event *ua_event;
+ struct ust_app_channel *ua_chan = NULL;
+ struct ust_app *app;
+
+ rcu_read_lock();
+
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
+ if (!app->compatible) {
+ /*
+ * TODO: In time, we should notice the caller of this error by
+ * telling him that this is a version error.
+ */
+ continue;
+ }
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ continue;
+ }
+
+ /* Lookup channel in the ust app session */
+ lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter);
+ ua_chan_node = lttng_ht_iter_get_node_str(&uiter);
+ if (ua_chan_node == NULL) {
+ continue;
+ }
+ ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel,
+ node);
+
+ lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter);
+ ua_event_node = lttng_ht_iter_get_node_str(&uiter);
+ if (ua_event_node == NULL) {
+ continue;
+ }
+ ua_event = caa_container_of(ua_event_node, struct ust_app_event,
+ node);
+
+ ret = set_ust_app_event_filter(ua_sess, ua_event, bytecode, app);
+ if (ret < 0) {
+ continue;
+ }
+ }
+
+ rcu_read_unlock();
+ return ret;
+}
+
/*
* Enable event for a channel from a UST session for a specific PID.
*/
app = find_app_by_sock(sock);
assert(app);
+ health_code_update(&health_thread_cmd);
+
ret = ustctl_tracer_version(sock, &app->version);
if (ret < 0) {
goto error;
}
/* Validate version */
- if (app->version.major > UST_APP_MAJOR_VERSION) {
+ if (app->version.major != UST_APP_MAJOR_VERSION) {
goto error;
}
- DBG2("UST app PID %d is compatible with major version %d "
- "(supporting <= %d)", app->key.pid, app->version.major,
+ DBG2("UST app PID %d is compatible with internal major version %d "
+ "(supporting == %d)", app->pid, app->version.major,
UST_APP_MAJOR_VERSION);
app->compatible = 1;
rcu_read_unlock();
+ health_code_update(&health_thread_cmd);
return 0;
error:
- DBG2("UST app PID %d is not compatible with major version %d "
- "(supporting <= %d)", app->key.pid, app->version.major,
+ DBG2("UST app PID %d is not compatible with internal major version %d "
+ "(supporting == %d)", app->pid, app->version.major,
UST_APP_MAJOR_VERSION);
app->compatible = 0;
rcu_read_unlock();
+ health_code_update(&health_thread_cmd);
return -1;
}
+
+/*
+ * Calibrate registered applications.
+ */
+int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate)
+{
+ int ret = 0;
+ struct lttng_ht_iter iter;
+ struct ust_app *app;
+
+ rcu_read_lock();
+
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
+ if (!app->compatible) {
+ /*
+ * TODO: In time, we should notice the caller of this error by
+ * telling him that this is a version error.
+ */
+ continue;
+ }
+
+ health_code_update(&health_thread_cmd);
+
+ ret = ustctl_calibrate(app->sock, calibrate);
+ if (ret < 0) {
+ switch (ret) {
+ case -ENOSYS:
+ /* Means that it's not implemented on the tracer side. */
+ ret = 0;
+ break;
+ default:
+ /* TODO: Report error to user */
+ DBG2("Calibrate app PID %d returned with error %d",
+ app->pid, ret);
+ break;
+ }
+ }
+ }
+
+ DBG("UST app global domain calibration finished");
+
+ rcu_read_unlock();
+
+ health_code_update(&health_thread_cmd);
+
+ return ret;
+}
projects / lttng-tools.git / blobdiff