Add event count in channel structure

[lttng-tools.git] / ltt-sessiond / kernel-ctl.c

diff --git a/ltt-sessiond/kernel-ctl.c b/ltt-sessiond/kernel-ctl.c
index 02b01414a4f76296cb4a9b97a2fd7661dbe9aab7..ef3afb714bf1bebe6b96376f484f15044f2e4555 100644 (file)
--- a/ltt-sessiond/kernel-ctl.c
+++ b/ltt-sessiond/kernel-ctl.c
@@ -3,8 +3,8 @@
  *
  * 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
@@ -25,7 +25,6 @@
 #include <unistd.h>
 
 #include "lttngerr.h"
-#include "ltt-sessiond.h"
 #include "libkernelctl.h"
 #include "kernel-ctl.h"
 
@@ -125,7 +124,6 @@ int kernel_create_session(struct ltt_session *session, int tracer_fd)
 
        lks->kconsumer_fds_sent = 0;
        session->kernel_session = lks;
-       session->kern_session_count++;
 
        DBG("Kernel session created (fd: %d)", lks->fd);
 
@@ -141,13 +139,13 @@ error:
  *  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;
        }
@@ -211,6 +209,8 @@ int kernel_create_event(struct lttng_event *ev, struct ltt_kernel_channel *chann
 
        /* 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;
@@ -283,6 +283,9 @@ int kernel_enable_event(struct ltt_kernel_event *event)
        ret = kernctl_enable(event->fd);
        if (ret < 0) {
                perror("enable event ioctl");
+               if (errno == EEXIST) {
+                       ret = -EEXIST;
+               }
                goto error;
        }
 
@@ -325,13 +328,13 @@ 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;
        }