-/*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
- * Copyright (C) 2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * 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 <urcu/list.h>
-
-#include <common/error.h>
-#include <common/sessiond-comm/sessiond-comm.h>
-
-#include "filter.h"
-#include "kernel.h"
-#include "ust-app.h"
-#include "trace-ust.h"
-
-/*
- * Add UST context to event.
- */
-static int add_ufilter_to_event(struct ltt_ust_session *usess, int domain,
- struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
- struct lttng_filter_bytecode *bytecode)
-{
- int ret;
-
- if (uevent->filter) {
- ret = -EEXIST;
- goto error;
- }
- /* Same layout. */
- uevent->filter = (struct lttng_ust_filter_bytecode *) bytecode;
- uevent->filter->seqnum = usess->filter_seq_num;
-
- switch (domain) {
- case LTTNG_DOMAIN_UST:
- ret = ust_app_set_filter_event_glb(usess, uchan, uevent,
- bytecode);
- if (ret < 0) {
- goto error;
- }
- usess->filter_seq_num++;
- break;
- default:
- ret = -ENOSYS;
- goto error;
- }
-
- DBG("Filter UST added to event %s",uevent->attr.name);
-
- return 0;
-
-error:
- free(bytecode);
- return ret;
-}
-
-/*
- * Add UST context to tracer.
- */
-int filter_ust_set(struct ltt_ust_session *usess, int domain,
- struct lttng_filter_bytecode *bytecode, struct lttng_event *event,
- char *channel_name)
-{
- int ret = LTTNG_OK, have_event = 0;
- struct lttng_ht_iter iter;
- struct lttng_ht *chan_ht;
- struct ltt_ust_channel *uchan = NULL;
- struct ltt_ust_event *uevent = NULL;
-
- /*
- * Define which channel's hashtable to use from the domain or quit if
- * unknown domain.
- */
- switch (domain) {
- case LTTNG_DOMAIN_UST:
- chan_ht = usess->domain_global.channels;
- break;
-#if 0
- case LTTNG_DOMAIN_UST_EXEC_NAME:
- case LTTNG_DOMAIN_UST_PID:
- case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN:
-#endif
- default:
- ret = LTTNG_ERR_UND;
- goto error;
- }
-
- /* Do we have a valid event. */
- if (event && event->name[0] != '\0') {
- have_event = 1;
- }
-
- /* Get UST channel if defined */
- if (strlen(channel_name) != 0) {
- uchan = trace_ust_find_channel_by_name(chan_ht, channel_name);
- if (uchan == NULL) {
- ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
- goto error;
- }
- }
-
- /* If UST channel specified and event name, get UST event ref */
- if (uchan && have_event) {
- uevent = trace_ust_find_event(uchan->events, event->name, bytecode,
- event->loglevel);
- if (uevent == NULL) {
- ret = LTTNG_ERR_UST_EVENT_NOT_FOUND;
- goto error;
- }
- }
-
- /* At this point, we have 4 possibilities */
-
- if (uchan && uevent) { /* Add filter to event in channel */
- ret = add_ufilter_to_event(usess, domain, uchan, uevent,
- bytecode);
- } else if (uchan && !have_event) { /* Add filter to channel */
- ERR("Cannot add filter to channel");
- ret = LTTNG_ERR_FATAL; /* not supported. */
- goto error;
- } else if (!uchan && have_event) { /* Add filter to event */
- /* Add context to event without having the channel name */
- cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) {
- uevent = trace_ust_find_event(uchan->events, event->name, bytecode,
- event->loglevel);
- if (uevent != NULL) {
- ret = add_ufilter_to_event(usess, domain, uchan, uevent, bytecode);
- /*
- * LTTng UST does not allowed the same event to be registered
- * multiple time in different or the same channel. So, if we
- * found our event, we stop.
- */
- goto end;
- }
- }
- ret = LTTNG_ERR_UST_EVENT_NOT_FOUND;
- goto error;
- } else if (!uchan && !have_event) { /* Add filter all events, all channels */
- ERR("Cannot add filter to channel");
- ret = LTTNG_ERR_FATAL; /* not supported. */
- goto error;
- }
-
-end:
- /* Must handle both local internal error and UST code. */
- switch (ret) {
- case -EEXIST:
- case -LTTNG_UST_ERR_EXIST:
- ret = LTTNG_ERR_FILTER_EXIST;
- break;
- case -ENOMEM:
- ret = LTTNG_ERR_FATAL;
- break;
- case -EINVAL:
- case -LTTNG_UST_ERR_INVAL:
- ret = LTTNG_ERR_FILTER_INVAL;
- break;
- case -ENOSYS:
- case -LTTNG_UST_ERR_NOSYS:
- ret = LTTNG_ERR_UNKNOWN_DOMAIN;
- break;
- default:
- ret = LTTNG_OK;
- break;
- }
-
-error:
- return ret;
-}
projects / lttng-tools.git / commitdiff
