X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Ftrace-ust.c;h=47e98cc782a28277309cb12d38796788d725eb93;hp=51632bad4ed602bcbc52fc769cc346bb709c74b3;hb=HEAD;hpb=0b2dc8df2a6d7b3341a72a04767dd6328907c97c

diff --git a/src/bin/lttng-sessiond/trace-ust.c b/src/bin/lttng-sessiond/trace-ust.c
deleted file mode 100644
index 51632bad4..000000000
--- a/src/bin/lttng-sessiond/trace-ust.c
+++ /dev/null
@@ -1,649 +0,0 @@
-/*
- * 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, 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.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#define _GNU_SOURCE
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <common/common.h>
-#include <common/defaults.h>
-
-#include "buffer-registry.h"
-#include "trace-ust.h"
-#include "utils.h"
-
-/*
- * Match function for the events hash table lookup.
- *
- * Matches by name only. Used by the disable command.
- */
-int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node,
-		const void *_key)
-{
-	struct ltt_ust_event *event;
-	const char *name;
-
-	assert(node);
-	assert(_key);
-
-	event = caa_container_of(node, struct ltt_ust_event, node.node);
-	name = _key;
-
-	/* Event name */
-	if (strncmp(event->attr.name, name, sizeof(event->attr.name)) != 0) {
-		goto no_match;
-	}
-
-	/* Match */
-	return 1;
-
-no_match:
-	return 0;
-}
-
-/*
- * Match function for the hash table lookup.
- *
- * It matches an ust event based on three attributes which are the event name,
- * the filter bytecode and the loglevel.
- */
-int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key)
-{
-	struct ltt_ust_event *event;
-	const struct ltt_ust_ht_key *key;
-
-	assert(node);
-	assert(_key);
-
-	event = caa_container_of(node, struct ltt_ust_event, node.node);
-	key = _key;
-
-	/* Match the 3 elements of the key: name, filter and loglevel. */
-
-	/* Event name */
-	if (strncmp(event->attr.name, key->name, sizeof(event->attr.name)) != 0) {
-		goto no_match;
-	}
-
-	/* Event loglevel. */
-	if (event->attr.loglevel != key->loglevel) {
-		if (event->attr.loglevel_type == LTTNG_UST_LOGLEVEL_ALL
-				&& key->loglevel == 0 && event->attr.loglevel == -1) {
-			/*
-			 * Match is accepted. This is because on event creation, the
-			 * loglevel is set to -1 if the event loglevel type is ALL so 0 and
-			 * -1 are accepted for this loglevel type since 0 is the one set by
-			 * the API when receiving an enable event.
-			 */
-		} else {
-			goto no_match;
-		}
-	}
-
-	/* Only one of the filters is NULL, fail. */
-	if ((key->filter && !event->filter) || (!key->filter && event->filter)) {
-		goto no_match;
-	}
-
-	if (key->filter && event->filter) {
-		/* Both filters exists, check length followed by the bytecode. */
-		if (event->filter->len != key->filter->len ||
-				memcmp(event->filter->data, key->filter->data,
-					event->filter->len) != 0) {
-			goto no_match;
-		}
-	}
-
-	/* Match. */
-	return 1;
-
-no_match:
-	return 0;
-}
-
-/*
- * Find the channel in the hashtable and return channel pointer. RCU read side
- * lock MUST be acquired before calling this.
- */
-struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht,
-		char *name)
-{
-	struct lttng_ht_node_str *node;
-	struct lttng_ht_iter iter;
-
-	lttng_ht_lookup(ht, (void *)name, &iter);
-	node = lttng_ht_iter_get_node_str(&iter);
-	if (node == NULL) {
-		goto error;
-	}
-
-	DBG2("Trace UST channel %s found by name", name);
-
-	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 in the hashtable and return event pointer. RCU read side lock
- * MUST be acquired before calling this.
- */
-struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht,
-		char *name, struct lttng_filter_bytecode *filter, int loglevel)
-{
-	struct lttng_ht_node_str *node;
-	struct lttng_ht_iter iter;
-	struct ltt_ust_ht_key key;
-
-	assert(name);
-	assert(ht);
-
-	key.name = name;
-	key.filter = filter;
-	key.loglevel = loglevel;
-
-	cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed),
-			trace_ust_ht_match_event, &key, &iter.iter);
-	node = lttng_ht_iter_get_node_str(&iter);
-	if (node == NULL) {
-		goto error;
-	}
-
-	DBG2("Trace UST event %s found", key.name);
-
-	return caa_container_of(node, struct ltt_ust_event, node);
-
-error:
-	DBG2("Trace UST event %s NOT found", key.name);
-	return NULL;
-}
-
-/*
- * Allocate and initialize a ust session data structure.
- *
- * Return pointer to structure or NULL.
- */
-struct ltt_ust_session *trace_ust_create_session(unsigned int session_id)
-{
-	struct ltt_ust_session *lus;
-
-	/* Allocate a new ltt ust session */
-	lus = zmalloc(sizeof(struct ltt_ust_session));
-	if (lus == NULL) {
-		PERROR("create ust session zmalloc");
-		goto error;
-	}
-
-	/* Init data structure */
-	lus->id = session_id;
-	lus->start_trace = 0;
-
-	/*
-	 * Default buffer type. This can be changed through an enable channel
-	 * requesting a different type. Note that this can only be changed once
-	 * during the session lifetime which is at the first enable channel and
-	 * only before start. The flag buffer_type_changed indicates the status.
-	 */
-	lus->buffer_type = LTTNG_BUFFER_PER_PID;
-	/* Once set to 1, the buffer_type is immutable for the session. */
-	lus->buffer_type_changed = 0;
-	/* Init it in case it get used after allocation. */
-	CDS_INIT_LIST_HEAD(&lus->buffer_reg_uid_list);
-
-	/* Alloc UST global domain channels' HT */
-	lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING);
-
-	lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL);
-	if (lus->consumer == NULL) {
-		goto error_consumer;
-	}
-
-	/*
-	 * The tmp_consumer stays NULL until a set_consumer_uri command is
-	 * executed. At this point, the consumer should be nullify until an
-	 * enable_consumer command. This assignment is symbolic since we've zmalloc
-	 * the struct.
-	 */
-	lus->tmp_consumer = NULL;
-
-	DBG2("UST trace session create successful");
-
-	return lus;
-
-error_consumer:
-	ht_cleanup_push(lus->domain_global.channels);
-	free(lus);
-error:
-	return NULL;
-}
-
-/*
- * Allocate and initialize a ust channel data structure.
- *
- * Return pointer to structure or NULL.
- */
-struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan)
-{
-	struct ltt_ust_channel *luc;
-
-	assert(chan);
-
-	luc = zmalloc(sizeof(struct ltt_ust_channel));
-	if (luc == NULL) {
-		PERROR("ltt_ust_channel zmalloc");
-		goto error;
-	}
-
-	/* Copy UST channel attributes */
-	luc->attr.overwrite = chan->attr.overwrite;
-	luc->attr.subbuf_size = chan->attr.subbuf_size;
-	luc->attr.num_subbuf = chan->attr.num_subbuf;
-	luc->attr.switch_timer_interval = chan->attr.switch_timer_interval;
-	luc->attr.read_timer_interval = chan->attr.read_timer_interval;
-	luc->attr.output = (enum lttng_ust_output) chan->attr.output;
-
-	/* Translate to UST output enum */
-	switch (luc->attr.output) {
-	default:
-		luc->attr.output = LTTNG_UST_MMAP;
-		break;
-	}
-
-	/* Copy channel name */
-	strncpy(luc->name, chan->name, sizeof(luc->name));
-	luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
-
-	/* Init node */
-	lttng_ht_node_init_str(&luc->node, luc->name);
-	/* Alloc hash tables */
-	luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING);
-	luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
-
-	/* On-disk circular buffer parameters */
-	luc->tracefile_size = chan->attr.tracefile_size;
-	luc->tracefile_count = chan->attr.tracefile_count;
-
-	DBG2("Trace UST channel %s created", luc->name);
-
-error:
-	return luc;
-}
-
-/*
- * Allocate and initialize a ust event. Set name and event type.
- *
- * Return pointer to structure or NULL.
- */
-struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev,
-		struct lttng_filter_bytecode *filter)
-{
-	struct ltt_ust_event *lue;
-
-	assert(ev);
-
-	lue = zmalloc(sizeof(struct ltt_ust_event));
-	if (lue == NULL) {
-		PERROR("ust event zmalloc");
-		goto error;
-	}
-
-	switch (ev->type) {
-	case LTTNG_EVENT_PROBE:
-		lue->attr.instrumentation = LTTNG_UST_PROBE;
-		break;
-	case LTTNG_EVENT_FUNCTION:
-		lue->attr.instrumentation = LTTNG_UST_FUNCTION;
-		break;
-	case LTTNG_EVENT_FUNCTION_ENTRY:
-		lue->attr.instrumentation = LTTNG_UST_FUNCTION;
-		break;
-	case LTTNG_EVENT_TRACEPOINT:
-		lue->attr.instrumentation = LTTNG_UST_TRACEPOINT;
-		break;
-	default:
-		ERR("Unknown ust instrumentation type (%d)", ev->type);
-		goto error_free_event;
-	}
-
-	/* Copy event name */
-	strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN);
-	lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
-
-	switch (ev->loglevel_type) {
-	case LTTNG_EVENT_LOGLEVEL_ALL:
-		lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL;
-		lue->attr.loglevel = -1;	/* Force to -1 */
-		break;
-	case LTTNG_EVENT_LOGLEVEL_RANGE:
-		lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE;
-		lue->attr.loglevel = ev->loglevel;
-		break;
-	case LTTNG_EVENT_LOGLEVEL_SINGLE:
-		lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE;
-		lue->attr.loglevel = ev->loglevel;
-		break;
-	default:
-		ERR("Unknown ust loglevel type (%d)", ev->loglevel_type);
-		goto error_free_event;
-	}
-
-	/* Same layout. */
-	lue->filter = (struct lttng_ust_filter_bytecode *) filter;
-
-	/* Init node */
-	lttng_ht_node_init_str(&lue->node, lue->attr.name);
-
-	DBG2("Trace UST event %s, loglevel (%d,%d) created",
-		lue->attr.name, lue->attr.loglevel_type,
-		lue->attr.loglevel);
-
-	return lue;
-
-error_free_event:
-	free(lue);
-error:
-	return NULL;
-}
-
-/*
- * Allocate and initialize a ust metadata.
- *
- * Return pointer to structure or NULL.
- */
-struct ltt_ust_metadata *trace_ust_create_metadata(char *path)
-{
-	int ret;
-	struct ltt_ust_metadata *lum;
-
-	assert(path);
-
-	lum = zmalloc(sizeof(struct ltt_ust_metadata));
-	if (lum == NULL) {
-		PERROR("ust metadata zmalloc");
-		goto error;
-	}
-
-	/* Set default attributes */
-	lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
-	lum->attr.subbuf_size = default_get_metadata_subbuf_size();
-	lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;
-	lum->attr.switch_timer_interval = DEFAULT_METADATA_SWITCH_TIMER;
-	lum->attr.read_timer_interval = DEFAULT_METADATA_READ_TIMER;
-	lum->attr.output = LTTNG_UST_MMAP;
-
-	lum->handle = -1;
-	/* Set metadata trace path */
-	ret = snprintf(lum->pathname, PATH_MAX, "%s/" DEFAULT_METADATA_NAME, path);
-	if (ret < 0) {
-		PERROR("asprintf ust metadata");
-		goto error_free_metadata;
-	}
-
-	return lum;
-
-error_free_metadata:
-	free(lum);
-error:
-	return NULL;
-}
-
-/*
- * Allocate and initialize an UST context.
- *
- * Return pointer to structure or NULL.
- */
-struct ltt_ust_context *trace_ust_create_context(
-		struct lttng_event_context *ctx)
-{
-	struct ltt_ust_context *uctx;
-	enum lttng_ust_context_type utype;
-
-	assert(ctx);
-
-	switch (ctx->ctx) {
-	case LTTNG_EVENT_CONTEXT_VTID:
-		utype = LTTNG_UST_CONTEXT_VTID;
-		break;
-	case LTTNG_EVENT_CONTEXT_VPID:
-		utype = LTTNG_UST_CONTEXT_VPID;
-		break;
-	case LTTNG_EVENT_CONTEXT_PTHREAD_ID:
-		utype = LTTNG_UST_CONTEXT_PTHREAD_ID;
-		break;
-	case LTTNG_EVENT_CONTEXT_PROCNAME:
-		utype = LTTNG_UST_CONTEXT_PROCNAME;
-		break;
-	default:
-		ERR("Invalid UST context");
-		return NULL;
-	}
-
-	uctx = zmalloc(sizeof(struct ltt_ust_context));
-	if (uctx == NULL) {
-		PERROR("zmalloc ltt_ust_context");
-		goto error;
-	}
-
-	uctx->ctx.ctx = utype;
-	lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx);
-
-	return uctx;
-
-error:
-	return NULL;
-}
-
-/*
- * RCU safe free context structure.
- */
-static void destroy_context_rcu(struct rcu_head *head)
-{
-	struct lttng_ht_node_ulong *node =
-		caa_container_of(head, struct lttng_ht_node_ulong, 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_contexts(struct lttng_ht *ht)
-{
-	int ret;
-	struct lttng_ht_node_ulong *node;
-	struct lttng_ht_iter iter;
-
-	assert(ht);
-
-	rcu_read_lock();
-	cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) {
-		ret = lttng_ht_del(ht, &iter);
-		if (!ret) {
-			call_rcu(&node->head, destroy_context_rcu);
-		}
-	}
-	rcu_read_unlock();
-
-	ht_cleanup_push(ht);
-}
-
-/*
- * Cleanup ust event structure.
- */
-void trace_ust_destroy_event(struct ltt_ust_event *event)
-{
-	assert(event);
-
-	DBG2("Trace destroy UST event %s", event->attr.name);
-	free(event->filter);
-	free(event);
-}
-
-/*
- * URCU intermediate call to complete destroy event.
- */
-static void destroy_event_rcu(struct rcu_head *head)
-{
-	struct lttng_ht_node_str *node =
-		caa_container_of(head, struct lttng_ht_node_str, head);
-	struct ltt_ust_event *event =
-		caa_container_of(node, struct ltt_ust_event, node);
-
-	trace_ust_destroy_event(event);
-}
-
-/*
- * Cleanup UST events hashtable.
- */
-static void destroy_events(struct lttng_ht *events)
-{
-	int ret;
-	struct lttng_ht_node_str *node;
-	struct lttng_ht_iter iter;
-
-	assert(events);
-
-	rcu_read_lock();
-	cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) {
-		ret = lttng_ht_del(events, &iter);
-		assert(!ret);
-		call_rcu(&node->head, destroy_event_rcu);
-	}
-	rcu_read_unlock();
-
-	ht_cleanup_push(events);
-}
-
-/*
- * Cleanup ust channel structure.
- *
- * Should _NOT_ be called with RCU read lock held.
- */
-static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel)
-{
-	assert(channel);
-
-	DBG2("Trace destroy UST channel %s", channel->name);
-
-	/* Destroying all events of the channel */
-	destroy_events(channel->events);
-	/* Destroying all context of the channel */
-	destroy_contexts(channel->ctx);
-
-	free(channel);
-}
-
-/*
- * URCU intermediate call to complete destroy channel.
- */
-static void destroy_channel_rcu(struct rcu_head *head)
-{
-	struct lttng_ht_node_str *node =
-		caa_container_of(head, struct lttng_ht_node_str, head);
-	struct ltt_ust_channel *channel =
-		caa_container_of(node, struct ltt_ust_channel, node);
-
-	_trace_ust_destroy_channel(channel);
-}
-
-void trace_ust_destroy_channel(struct ltt_ust_channel *channel)
-{
-	call_rcu(&channel->node.head, destroy_channel_rcu);
-}
-
-/*
- * Cleanup ust metadata structure.
- */
-void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata)
-{
-	assert(metadata);
-
-	if (!metadata->handle) {
-		return;
-	}
-	DBG2("Trace UST destroy metadata %d", metadata->handle);
-	free(metadata);
-}
-
-/*
- * Iterate over a hash table containing channels and cleanup safely.
- */
-static void destroy_channels(struct lttng_ht *channels)
-{
-	int ret;
-	struct lttng_ht_node_str *node;
-	struct lttng_ht_iter iter;
-
-	assert(channels);
-
-	rcu_read_lock();
-
-	cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) {
-		ret = lttng_ht_del(channels, &iter);
-		assert(!ret);
-		call_rcu(&node->head, destroy_channel_rcu);
-	}
-	rcu_read_unlock();
-
-	ht_cleanup_push(channels);
-}
-
-/*
- * Cleanup UST global domain.
- */
-static void destroy_domain_global(struct ltt_ust_domain_global *dom)
-{
-	assert(dom);
-
-	destroy_channels(dom->channels);
-}
-
-/*
- * Cleanup ust session structure
- *
- * Should *NOT* be called with RCU read-side lock held.
- */
-void trace_ust_destroy_session(struct ltt_ust_session *session)
-{
-	struct buffer_reg_uid *reg, *sreg;
-
-	assert(session);
-
-	DBG2("Trace UST destroy session %u", session->id);
-
-	/* Cleaning up UST domain */
-	destroy_domain_global(&session->domain_global);
-
-	/* Cleanup UID buffer registry object(s). */
-	cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list,
-			lnode) {
-		cds_list_del(&reg->lnode);
-		buffer_reg_uid_remove(reg);
-		buffer_reg_uid_destroy(reg, session->consumer);
-	}
-
-	consumer_destroy_output(session->consumer);
-	consumer_destroy_output(session->tmp_consumer);
-
-	free(session);
-}