/*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
- * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@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.
+ * SPDX-License-Identifier: GPL-2.0-only
*
- * 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 _LGPL_SOURCE
/*
* Add kernel context to all channel.
+ *
+ * Assumes the ownership of kctx.
*/
static int add_kctx_all_channels(struct ltt_kernel_session *ksession,
struct ltt_kernel_context *kctx)
/* Go over all channels */
cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) {
- ret = kernel_add_channel_context(kchan, kctx);
+ struct ltt_kernel_context *kctx_copy;
+
+ kctx_copy = trace_kernel_copy_context(kctx);
+ if (!kctx_copy) {
+ PERROR("zmalloc ltt_kernel_context");
+ ret = -LTTNG_ERR_NOMEM;
+ goto error;
+ }
+
+ /* Ownership of kctx_copy is transferred to the callee. */
+ ret = kernel_add_channel_context(kchan, kctx_copy);
+ kctx_copy = NULL;
if (ret != 0) {
goto error;
}
ret = LTTNG_OK;
error:
+ trace_kernel_destroy_context(kctx);
return ret;
}
/*
* Add kernel context to a specific channel.
+ *
+ * Assumes the ownership of kctx.
*/
static int add_kctx_to_channel(struct ltt_kernel_context *kctx,
struct ltt_kernel_channel *kchan)
DBG("Add kernel context to channel '%s'", kchan->channel->name);
+ /* Ownership of kctx is transferred to the callee. */
ret = kernel_add_channel_context(kchan, kctx);
+ kctx = NULL;
if (ret != 0) {
goto error;
}
*/
static int add_uctx_to_channel(struct ltt_ust_session *usess,
enum lttng_domain_type domain,
- struct ltt_ust_channel *uchan, struct lttng_event_context *ctx)
+ struct ltt_ust_channel *uchan,
+ const struct lttng_event_context *ctx)
{
int ret;
struct ltt_ust_context *uctx = NULL;
/* Check if context is duplicate */
cds_list_for_each_entry(uctx, &uchan->ctx_list, list) {
if (trace_ust_match_context(uctx, ctx)) {
- ret = -EEXIST;
+ ret = LTTNG_ERR_UST_CONTEXT_EXIST;
goto duplicate;
}
}
if (!agt) {
agt = agent_create(domain);
if (!agt) {
- ret = LTTNG_ERR_NOMEM;
+ ret = -LTTNG_ERR_NOMEM;
goto error;
}
agent_add(agt, usess->agents);
/* Create ltt UST context */
uctx = trace_ust_create_context(ctx);
if (uctx == NULL) {
- ret = -EINVAL;
- goto error;
- }
-
- ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx);
- if (ret < 0) {
+ ret = LTTNG_ERR_UST_CONTEXT_INVAL;
goto error;
}
- rcu_read_lock();
-
/* Add ltt UST context node to ltt UST channel */
lttng_ht_add_ulong(uchan->ctx, &uctx->node);
- rcu_read_unlock();
cds_list_add_tail(&uctx->list, &uchan->ctx_list);
+ if (!usess->active) {
+ goto end;
+ }
+
+ ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx);
+ if (ret < 0) {
+ goto error;
+ }
+end:
DBG("Context UST %d added to channel %s", uctx->ctx.ctx, uchan->name);
return 0;
* Add kernel context to tracer.
*/
int context_kernel_add(struct ltt_kernel_session *ksession,
- struct lttng_event_context *ctx, char *channel_name)
+ const struct lttng_event_context *ctx, char *channel_name)
{
int ret;
struct ltt_kernel_channel *kchan;
kctx = trace_kernel_create_context(NULL);
if (!kctx) {
- ret = LTTNG_ERR_NOMEM;
+ ret = -LTTNG_ERR_NOMEM;
goto error;
}
case LTTNG_EVENT_CONTEXT_MIGRATABLE:
kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_MIGRATABLE;
break;
+ case LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL;
+ break;
+ case LTTNG_EVENT_CONTEXT_CALLSTACK_USER:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_CALLSTACK_USER;
+ break;
+ case LTTNG_EVENT_CONTEXT_CGROUP_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_CGROUP_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_IPC_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_IPC_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_MNT_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_MNT_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_NET_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_NET_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_PID_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PID_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_TIME_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_TIME_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_USER_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_USER_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_UTS_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_UTS_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_UID:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_UID;
+ break;
+ case LTTNG_EVENT_CONTEXT_EUID:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_EUID;
+ break;
+ case LTTNG_EVENT_CONTEXT_SUID:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_SUID;
+ break;
+ case LTTNG_EVENT_CONTEXT_GID:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_GID;
+ break;
+ case LTTNG_EVENT_CONTEXT_EGID:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_EGID;
+ break;
+ case LTTNG_EVENT_CONTEXT_SGID:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_SGID;
+ break;
+ case LTTNG_EVENT_CONTEXT_VUID:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VUID;
+ break;
+ case LTTNG_EVENT_CONTEXT_VEUID:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VEUID;
+ break;
+ case LTTNG_EVENT_CONTEXT_VSUID:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VSUID;
+ break;
+ case LTTNG_EVENT_CONTEXT_VGID:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VGID;
+ break;
+ case LTTNG_EVENT_CONTEXT_VEGID:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VEGID;
+ break;
+ case LTTNG_EVENT_CONTEXT_VSGID:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VSGID;
+ break;
default:
ret = LTTNG_ERR_KERN_CONTEXT_FAIL;
goto error;
if (*channel_name == '\0') {
ret = add_kctx_all_channels(ksession, kctx);
+ /* Ownership of kctx is transferred to the callee. */
+ kctx = NULL;
if (ret != LTTNG_OK) {
goto error;
}
}
ret = add_kctx_to_channel(kctx, kchan);
+ /* Ownership of kctx is transferred to the callee. */
+ kctx = NULL;
if (ret != LTTNG_OK) {
goto error;
}
}
- return LTTNG_OK;
+ ret = LTTNG_OK;
error:
if (kctx) {
* Add UST context to tracer.
*/
int context_ust_add(struct ltt_ust_session *usess,
- enum lttng_domain_type domain, struct lttng_event_context *ctx,
+ enum lttng_domain_type domain,
+ const struct lttng_event_context *ctx,
char *channel_name)
{
int ret = LTTNG_OK;
/* Add ctx all events, all channels */
cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) {
ret = add_uctx_to_channel(usess, domain, uchan, ctx);
- if (ret < 0) {
+ if (ret) {
ERR("Failed to add context to channel %s",
uchan->name);
continue;
}
switch (ret) {
- case -EEXIST:
- ret = LTTNG_ERR_UST_CONTEXT_EXIST;
+ case LTTNG_ERR_UST_CONTEXT_EXIST:
break;
case -ENOMEM:
+ case -LTTNG_ERR_NOMEM:
ret = LTTNG_ERR_FATAL;
break;
case -EINVAL:
ret = LTTNG_ERR_UNKNOWN_DOMAIN;
break;
default:
- ret = LTTNG_OK;
+ if (ret != 0 && ret != LTTNG_OK) {
+ ret = ret > 0 ? ret : LTTNG_ERR_UNK;
+ } else {
+ ret = LTTNG_OK;
+ }
break;
}
projects / lttng-tools.git / blobdiff