+/*
+ * 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.
+ */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "ltt-sessiond.h"
+#include "libkernelctl.h"
+#include "kernel-ctl.h"
+#include "trace.h"
+
+/*
+ * kernel_create_session
+ *
+ * Create a new kernel session using the command context session.
+ */
+int kernel_create_session(struct command_ctx *cmd_ctx, int tracer_fd)
+{
+ int ret;
+ struct ltt_kernel_session *lks;
+
+ /* Allocate a new kernel session */
+ lks = malloc(sizeof(struct ltt_kernel_session));
+ if (lks == NULL) {
+ perror("kernel session malloc");
+ ret = -errno;
+ goto error;
+ }
+
+ ret = kernctl_create_session(tracer_fd);
+ if (ret < 0) {
+ goto error;
+ }
+
+ /* Assigning session fd and to the command context */
+ lks->fd = ret;
+ cmd_ctx->session->kernel_session = lks;
+ cmd_ctx->session->kern_session_count++;
+
+ return 0;
+
+error:
+ return ret;
+}
+
+/*
+ * kernel_create_channel
+ *
+ * Create a kernel channel within the kernel session.
+ */
+int kernel_create_channel(struct command_ctx *cmd_ctx)
+{
+ int ret;
+ struct ltt_kernel_channel *lkc;
+ struct lttng_channel *chan;
+
+ lkc = malloc(sizeof(struct ltt_kernel_channel));
+ chan = malloc(sizeof(struct lttng_channel));
+
+ if (lkc == NULL || chan == NULL) {
+ perror("kernel channel malloc");
+ ret = -errno;
+ goto error;
+ }
+
+ 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;
+
+ ret = kernctl_create_channel(cmd_ctx->session->kernel_session->fd, chan);
+ if (ret < 0) {
+ goto error;
+ }
+
+ lkc->fd = ret;
+ lkc->channel = chan;
+ CDS_INIT_LIST_HEAD(&lkc->events_list.head);
+
+ cmd_ctx->session->kernel_session->channel = lkc;
+
+ return 0;
+
+error:
+ return ret;
+}
projects / lttng-tools.git / commitdiff
