+/*
+ * 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
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <urcu/list.h>
+
+#include "ltt-sessiond.h"
+#include "trace.h"
+
+/*
+ * trace_create_kernel_session
+ *
+ * Allocate and initialize a kernel session data structure.
+ *
+ * Return pointer to structure or NULL.
+ */
+struct ltt_kernel_session *trace_create_kernel_session(void)
+{
+ struct ltt_kernel_session *lks;
+
+ /* Allocate a new ltt kernel session */
+ lks = malloc(sizeof(struct ltt_kernel_session));
+ if (lks == NULL) {
+ perror("create kernel session malloc");
+ goto error;
+ }
+
+ /* Init data structure */
+ lks->fd = 0;
+ lks->metadata_stream_fd = 0;
+ lks->channel_count = 0;
+ lks->stream_count_global = 0;
+ lks->metadata = NULL;
+ CDS_INIT_LIST_HEAD(&lks->channel_list.head);
+
+ return lks;
+
+error:
+ return NULL;
+}
+
+/*
+ * trace_create_kernel_channel
+ *
+ * Allocate and initialize a kernel channel data structure.
+ *
+ * Return pointer to structure or NULL.
+ */
+struct ltt_kernel_channel *trace_create_kernel_channel(void)
+{
+ int ret;
+ struct ltt_kernel_channel *lkc;
+ struct lttng_kernel_channel *chan;
+
+ lkc = malloc(sizeof(struct ltt_kernel_channel));
+ chan = malloc(sizeof(struct lttng_kernel_channel));
+ if (lkc == NULL || chan == NULL) {
+ perror("kernel channel malloc");
+ goto error;
+ }
+
+ /* Default value to channel */
+ chan->overwrite = DEFAULT_KERNEL_OVERWRITE;
+ chan->subbuf_size = DEFAULT_KERNEL_SUBBUF_SIZE;
+ chan->num_subbuf = DEFAULT_KERNEL_SUBBUF_NUM;
+ chan->switch_timer_interval = DEFAULT_KERNEL_SWITCH_TIMER;
+ chan->read_timer_interval = DEFAULT_KERNEL_READ_TIMER;
+
+ lkc->fd = 0;
+ lkc->stream_count = 0;
+ lkc->channel = chan;
+ /* Init linked list */
+ CDS_INIT_LIST_HEAD(&lkc->events_list.head);
+ CDS_INIT_LIST_HEAD(&lkc->stream_list.head);
+ /* Set default trace output path */
+ ret = asprintf(&lkc->pathname, "%s", DEFAULT_TRACE_OUTPUT);
+ if (ret < 0) {
+ perror("asprintf kernel create channel");
+ goto error;
+ }
+
+ return lkc;
+
+error:
+ return NULL;
+}
+
+/*
+ * trace_create_kernel_event
+ *
+ * Allocate and initialize a kernel event. Set name and event type.
+ *
+ * Return pointer to structure or NULL.
+ */
+struct ltt_kernel_event *trace_create_kernel_event(char *name,
+ enum lttng_kernel_instrumentation type)
+{
+ struct ltt_kernel_event *lke;
+ struct lttng_kernel_event *attr;
+
+ lke = malloc(sizeof(struct ltt_kernel_event));
+ attr = malloc(sizeof(struct lttng_kernel_event));
+ if (lke == NULL || attr == NULL) {
+ perror("kernel event malloc");
+ goto error;
+ }
+
+ /* Init event attribute */
+ attr->instrumentation = type;
+ strncpy(attr->name, name, LTTNG_SYM_NAME_LEN);
+ /* Setting up a kernel event */
+ lke->fd = 0;
+ lke->event = attr;
+
+ return lke;
+
+error:
+ return NULL;
+}
+
+/*
+ * trace_create_kernel_metadata
+ *
+ * Allocate and initialize a kernel metadata.
+ *
+ * Return pointer to structure or NULL.
+ */
+struct ltt_kernel_metadata *trace_create_kernel_metadata(void)
+{
+ int ret;
+ struct ltt_kernel_metadata *lkm;
+ struct lttng_kernel_channel *attr;
+
+ lkm = malloc(sizeof(struct ltt_kernel_metadata));
+ attr = malloc(sizeof(struct lttng_kernel_channel));
+ if (lkm == NULL || attr == NULL) {
+ perror("kernel metadata malloc");
+ goto error;
+ }
+
+ /* Set default attributes */
+ attr->overwrite = DEFAULT_KERNEL_OVERWRITE;
+ attr->subbuf_size = DEFAULT_KERNEL_SUBBUF_SIZE;
+ attr->num_subbuf = DEFAULT_KERNEL_SUBBUF_NUM;
+ attr->switch_timer_interval = DEFAULT_KERNEL_SWITCH_TIMER;
+ attr->read_timer_interval = DEFAULT_KERNEL_READ_TIMER;
+
+ /* Init metadata */
+ lkm->fd = 0;
+ lkm->conf = attr;
+ /* Set default metadata path */
+ ret = asprintf(&lkm->pathname, "%s/metadata", DEFAULT_TRACE_OUTPUT);
+ if (ret < 0) {
+ perror("asprintf kernel metadata");
+ goto error;
+ }
+
+ return lkm;
+
+error:
+ return NULL;
+}
+
+/*
+ * trace_create_kernel_stream
+ *
+ * Allocate and initialize a kernel stream. The stream is set to ACTIVE_FD by
+ * default.
+ *
+ * Return pointer to structure or NULL.
+ */
+struct ltt_kernel_stream *trace_create_kernel_stream(void)
+{
+ struct ltt_kernel_stream *lks;
+
+ lks = malloc(sizeof(struct ltt_kernel_stream));
+ if (lks == NULL) {
+ perror("kernel stream malloc");
+ goto error;
+ }
+
+ /* Init stream */
+ lks->fd = 0;
+ lks->pathname = NULL;
+ lks->state = 0;
+
+ return lks;
+
+error:
+ return NULL;
+}