#include <lttngerr.h>
#include <lttng-share.h>
+#include "hashtable.h"
#include "trace-ust.h"
/*
- * Using a ust session list, it will return the session corresponding to the
- * pid. Must be a session of domain LTTNG_DOMAIN_UST_PID.
+ * Find the channel in the hashtable.
*/
-struct ltt_ust_session *trace_ust_get_session_by_pid(
- struct ltt_ust_session_list *session_list, pid_t pid)
+struct ltt_ust_channel *trace_ust_find_channel_by_name(struct cds_lfht *ht,
+ char *name)
{
- struct ltt_ust_session *sess;
+ struct cds_lfht_node *node;
+ struct cds_lfht_iter iter;
- if (session_list == NULL) {
- ERR("Session list is NULL");
+ rcu_read_lock();
+ node = hashtable_lookup(ht, (void *) name, strlen(name), &iter);
+ if (node == NULL) {
+ rcu_read_unlock();
goto error;
}
+ rcu_read_unlock();
- cds_list_for_each_entry(sess, &session_list->head, list) {
- if (sess->domain.type == LTTNG_DOMAIN_UST_PID &&
- sess->domain.attr.pid == pid) {
- DBG2("Trace UST session found by pid %d", pid);
- return sess;
- }
- }
-
-error:
- return NULL;
-}
+ DBG2("Trace UST channel %s found by name", name);
-/*
- * Find the channel name for the given ust session.
- */
-struct ltt_ust_channel *trace_ust_get_channel_by_name(
- char *name, struct ltt_ust_session *session)
-{
- struct ltt_ust_channel *chan;
-
- if (session == NULL) {
- ERR("Undefine session");
- goto error;
- }
-
- cds_list_for_each_entry(chan, &session->channels.head, list) {
- if (strcmp(name, chan->name) == 0) {
- DBG2("Found UST channel by name %s", name);
- return chan;
- }
- }
+ return caa_container_of(node, struct ltt_ust_channel, node);
error:
+ DBG2("Trace UST channel %s not found by name", name);
return NULL;
}
/*
- * Find the event name for the given channel.
+ * Find the event in the hashtable.
*/
-struct ltt_ust_event *trace_ust_get_event_by_name(
- char *name, struct ltt_ust_channel *channel)
+struct ltt_ust_event *trace_ust_find_event_by_name(struct cds_lfht *ht,
+ char *name)
{
- struct ltt_ust_event *ev;
+ struct cds_lfht_node *node;
+ struct cds_lfht_iter iter;
- if (channel == NULL) {
- ERR("Undefine channel");
+ rcu_read_lock();
+ node = hashtable_lookup(ht, (void *) name, strlen(name), &iter);
+ if (node == NULL) {
+ rcu_read_unlock();
goto error;
}
+ rcu_read_unlock();
- cds_list_for_each_entry(ev, &channel->events.head, list) {
- if (strcmp(name, ev->attr.name) == 0) {
- DBG("Found UST event by name %s for channel %s", name,
- channel->name);
- return ev;
- }
- }
+ DBG2("Found UST event by name %s", name);
+
+ return caa_container_of(node, struct ltt_ust_event, node);
error:
return NULL;
lus->enabled = 1;
lus->consumer_fds_sent = 0;
lus->metadata = NULL;
- lus->channels.count = 0;
- CDS_INIT_LIST_HEAD(&lus->channels.head);
- /* Copy lttng_domain */
- memcpy(&lus->domain, domain, sizeof(struct lttng_domain));
+ /* Alloc UST domain hash tables */
+ lus->domain_pid = hashtable_new(0);
+ lus->domain_exec = hashtable_new_str(0);
+
+ /* Alloc UST global domain channels' HT */
+ lus->domain_global.channels = hashtable_new_str(0);
/* Set session path */
ret = snprintf(lus->path, PATH_MAX, "%s/ust_%d", path, pid);
luc->handle = -1;
luc->enabled = 1;
- luc->events.count = 0;
- CDS_INIT_LIST_HEAD(&luc->events.head);
-
- memset(&luc->ctx, 0, sizeof(struct lttng_ust_context));
/* Copy channel name */
strncpy(luc->name, chan->name, sizeof(&luc->name));
luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ /* Init node */
+ hashtable_node_init(&luc->node, (void *) luc->name, strlen(luc->name));
+ /* Alloc hash tables */
+ luc->events = hashtable_new_str(0);
+ luc->ctx = hashtable_new_str(0);
+
/* Set trace output path */
ret = snprintf(luc->trace_path, PATH_MAX, "%s", path);
if (ret < 0) {
}
CDS_INIT_LIST_HEAD(&luc->stream_list.head);
+ DBG2("Trace UST channel %s created", luc->name);
+
return luc;
error:
/* Setting up a ust event */
lue->handle = -1;
lue->enabled = 1;
- memset(&lue->ctx, 0, sizeof(struct lttng_ust_context));
+
+ /* Init node */
+ hashtable_node_init(&lue->node, (void *) lue->attr.name,
+ strlen(lue->attr.name));
+ /* Alloc context hash tables */
+ lue->ctx = hashtable_new_str(5);
return lue;
lum->handle = -1;
/* Set metadata trace path */
- ret = asprintf(&lum->pathname, "%s/metadata", path);
+ ret = snprintf(lum->pathname, PATH_MAX, "%s/metadata", path);
if (ret < 0) {
perror("asprintf ust metadata");
goto error;
return NULL;
}
+/*
+ * RCU safe free context structure.
+ */
+static void destroy_context_rcu(struct rcu_head *head)
+{
+ struct cds_lfht_node *node =
+ caa_container_of(head, struct cds_lfht_node, head);
+ struct ltt_ust_context *ctx =
+ caa_container_of(node, struct ltt_ust_context, node);
+
+ free(ctx);
+}
+
+/*
+ * Cleanup UST context hash table.
+ */
+static void destroy_context(struct cds_lfht *ht)
+{
+ int ret;
+ struct cds_lfht_node *node;
+ struct cds_lfht_iter iter;
+
+ hashtable_get_first(ht, &iter);
+ while ((node = hashtable_iter_get_node(&iter)) != NULL) {
+ ret = hashtable_del(ht, &iter);
+ if (!ret) {
+ call_rcu(&node->head, destroy_context_rcu);
+ }
+ hashtable_get_next(ht, &iter);
+ }
+}
+
/*
* Cleanup ust event structure.
*/
void trace_ust_destroy_event(struct ltt_ust_event *event)
{
- DBG("[trace] Destroy ust event %s", event->attr.name);
-
- /* Remove from event list */
- cds_list_del(&event->list);
+ DBG2("Trace destroy UST event %s", event->attr.name);
+ destroy_context(event->ctx);
free(event);
}
+/*
+ * URCU intermediate call to complete destroy event.
+ */
+static void destroy_event_rcu(struct rcu_head *head)
+{
+ struct cds_lfht_node *node =
+ caa_container_of(head, struct cds_lfht_node, head);
+ struct ltt_ust_event *event =
+ caa_container_of(node, struct ltt_ust_event, node);
+
+ trace_ust_destroy_event(event);
+}
+
/*
* Cleanup ust channel structure.
*/
void trace_ust_destroy_channel(struct ltt_ust_channel *channel)
{
- struct ltt_ust_event *event, *etmp;
+ int ret;
+ struct cds_lfht_node *node;
+ struct cds_lfht_iter iter;
- DBG("[trace] Destroy ust channel %d", channel->handle);
+ DBG2("Trace destroy UST channel %s", channel->name);
- /* For each event in the channel list */
- cds_list_for_each_entry_safe(event, etmp, &channel->events.head, list) {
- trace_ust_destroy_event(event);
+ rcu_read_lock();
+
+ hashtable_get_first(channel->events, &iter);
+ while ((node = hashtable_iter_get_node(&iter)) != NULL) {
+ ret = hashtable_del(channel->events, &iter);
+ if (!ret) {
+ call_rcu(&node->head, destroy_event_rcu);
+ }
+ hashtable_get_next(channel->events, &iter);
}
- /* Remove from channel list */
- cds_list_del(&channel->list);
+ free(channel->events);
+ destroy_context(channel->ctx);
free(channel);
+
+ rcu_read_unlock();
+}
+
+/*
+ * URCU intermediate call to complete destroy channel.
+ */
+static void destroy_channel_rcu(struct rcu_head *head)
+{
+ struct cds_lfht_node *node =
+ caa_container_of(head, struct cds_lfht_node, head);
+ struct ltt_ust_channel *channel =
+ caa_container_of(node, struct ltt_ust_channel, node);
+
+ trace_ust_destroy_channel(channel);
}
/*
*/
void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata)
{
- DBG("[trace] Destroy ust metadata %d", metadata->handle);
+ DBG2("Trace UST destroy metadata %d", metadata->handle);
- /* Free attributes */
- free(metadata->pathname);
free(metadata);
}
/*
- * Cleanup ust session structure
+ * Iterate over a hash table containing channels and cleanup safely.
*/
-void trace_ust_destroy_session(struct ltt_ust_session *session)
+static void destroy_channels(struct cds_lfht *channels)
+{
+ int ret;
+ struct cds_lfht_node *node;
+ struct cds_lfht_iter iter;
+
+ hashtable_get_first(channels, &iter);
+ while ((node = hashtable_iter_get_node(&iter)) != NULL) {
+ ret = hashtable_del(channels, &iter);
+ if (!ret) {
+ call_rcu(&node->head, destroy_channel_rcu);
+ }
+ hashtable_get_next(channels, &iter);
+ }
+}
+
+/*
+ * Cleanup UST pid domain.
+ */
+static void destroy_domain_pid(struct cds_lfht *ht)
+{
+ int ret;
+ struct cds_lfht_node *node;
+ struct cds_lfht_iter iter;
+ struct ltt_ust_domain_pid *d;
+
+ hashtable_get_first(ht, &iter);
+ while ((node = hashtable_iter_get_node(&iter)) != NULL) {
+ ret = hashtable_del(ht , &iter);
+ if (!ret) {
+ d = caa_container_of(node, struct ltt_ust_domain_pid, node);
+ destroy_channels(d->channels);
+ }
+ hashtable_get_next(ht, &iter);
+ }
+}
+
+/*
+ * Cleanup UST exec name domain.
+ */
+static void destroy_domain_exec(struct cds_lfht *ht)
{
- struct ltt_ust_channel *channel, *ctmp;
+ int ret;
+ struct cds_lfht_node *node;
+ struct cds_lfht_iter iter;
+ struct ltt_ust_domain_exec *d;
+
+ hashtable_get_first(ht, &iter);
+ while ((node = hashtable_iter_get_node(&iter)) != NULL) {
+ ret = hashtable_del(ht , &iter);
+ if (!ret) {
+ d = caa_container_of(node, struct ltt_ust_domain_exec, node);
+ destroy_channels(d->channels);
+ }
+ hashtable_get_next(ht, &iter);
+ }
+}
- DBG("[trace] Destroy ust session %d", session->handle);
+/*
+ * Cleanup UST global domain.
+ */
+static void destroy_domain_global(struct ltt_ust_domain_global *dom)
+{
+ destroy_channels(dom->channels);
+}
+/*
+ * Cleanup ust session structure
+ */
+void trace_ust_destroy_session(struct ltt_ust_session *session)
+{
/* Extra safety */
if (session == NULL) {
return;
}
+ rcu_read_lock();
+
+ DBG2("Trace UST destroy session %d", session->handle);
+
if (session->metadata != NULL) {
trace_ust_destroy_metadata(session->metadata);
}
- cds_list_for_each_entry_safe(channel, ctmp, &session->channels.head, list) {
- trace_ust_destroy_channel(channel);
- }
-
- if (session->path) {
- free(session->path);
- }
+ /* Cleaning up UST domain */
+ destroy_domain_global(&session->domain_global);
+ destroy_domain_pid(session->domain_pid);
+ destroy_domain_exec(session->domain_exec);
free(session);
+
+ rcu_read_unlock();
}
projects / lttng-tools.git / blobdiff