*
* 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; either version 2
- * of the License, or (at your option) any later version.
+ * as published by the Free Software Foundation; only version 2
+ * of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
#include <unistd.h>
#include "lttngerr.h"
-#include "ltt-sessiond.h"
#include "libkernelctl.h"
#include "kernel-ctl.h"
+/*
+ * kernel_add_channel_context
+ *
+ * Add context on a kernel channel.
+ */
+int kernel_add_channel_context(struct ltt_kernel_channel *chan,
+ struct lttng_kernel_context *ctx)
+{
+ int ret;
+
+ DBG("Adding context to channel %s", chan->channel->name);
+ ret = kernctl_add_context(chan->fd, ctx);
+ if (ret < 0) {
+ perror("add context ioctl");
+ goto error;
+ }
+
+ chan->ctx = malloc(sizeof(struct lttng_kernel_context));
+ if (chan->ctx == NULL) {
+ perror("malloc event context");
+ goto error;
+ }
+
+ memcpy(chan->ctx, ctx, sizeof(struct lttng_kernel_context));
+
+ return 0;
+
+error:
+ return ret;
+}
+
+/*
+ * kernel_add_event_context
+ *
+ * Add context on a kernel event.
+ */
+int kernel_add_event_context(struct ltt_kernel_event *event,
+ struct lttng_kernel_context *ctx)
+{
+ int ret;
+
+ DBG("Adding context to event %s", event->event->name);
+ ret = kernctl_add_context(event->fd, ctx);
+ if (ret < 0) {
+ perror("add context ioctl");
+ goto error;
+ }
+
+ event->ctx = malloc(sizeof(struct lttng_kernel_context));
+ if (event->ctx == NULL) {
+ perror("malloc event context");
+ goto error;
+ }
+
+ memcpy(event->ctx, ctx, sizeof(struct lttng_kernel_context));
+
+ return 0;
+
+error:
+ return ret;
+}
+
/*
* kernel_create_session
*
lks->kconsumer_fds_sent = 0;
session->kernel_session = lks;
- session->kern_session_count++;
DBG("Kernel session created (fd: %d)", lks->fd);
* Create a kernel channel, register it to the kernel tracer and add it to the
* kernel session.
*/
-int kernel_create_channel(struct ltt_kernel_session *session, struct lttng_channel *chan)
+int kernel_create_channel(struct ltt_kernel_session *session, struct lttng_channel *chan, char *path)
{
int ret;
struct ltt_kernel_channel *lkc;
/* Allocate kernel channel */
- lkc = trace_create_kernel_channel(chan);
+ lkc = trace_create_kernel_channel(chan, path);
if (lkc == NULL) {
goto error;
}
/* Add event to event list */
cds_list_add(&event->list, &channel->events_list.head);
+ channel->event_count++;
+
DBG("Event %s created (fd: %d)", ev->name, event->fd);
return 0;
return -1;
}
+/*
+ * kernel_disable_channel
+ *
+ * Disable a kernel channel.
+ */
+int kernel_disable_channel(struct ltt_kernel_channel *chan)
+{
+ int ret;
+
+ ret = kernctl_disable(chan->fd);
+ if (ret < 0) {
+ perror("disable chan ioctl");
+ ret = errno;
+ goto error;
+ }
+
+ chan->enabled = 0;
+ DBG("Kernel channel %s disabled (fd: %d)", chan->channel->name, chan->fd);
+
+ return 0;
+
+error:
+ return ret;
+}
+
/*
* kernel_enable_channel
*
ret = kernctl_enable(event->fd);
if (ret < 0) {
perror("enable event ioctl");
+ if (errno == EEXIST) {
+ ret = -EEXIST;
+ }
goto error;
}
* Create kernel metadata, open from the kernel tracer and add it to the
* kernel session.
*/
-int kernel_open_metadata(struct ltt_kernel_session *session)
+int kernel_open_metadata(struct ltt_kernel_session *session, char *path)
{
int ret;
struct ltt_kernel_metadata *lkm;
/* Allocate kernel metadata */
- lkm = trace_create_kernel_metadata();
+ lkm = trace_create_kernel_metadata(path);
if (lkm == NULL) {
goto error;
}
perror("fcntl session fd");
}
- ret = asprintf(&lks->pathname, "%s/trace_%d",
- channel->pathname, channel->stream_count);
+ ret = asprintf(&lks->pathname, "%s/%s_%d",
+ channel->pathname, channel->channel->name, channel->stream_count);
if (ret < 0) {
perror("asprintf kernel create stream");
goto error;