--- /dev/null
+/*
+ * 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; 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 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 <urcu/list.h>
+#include <string.h>
+
+#include <lttng/lttng.h>
+#include <lttng-sessiond-comm.h>
+#include <lttngerr.h>
+
+#ifdef CONFIG_LTTNG_TOOLS_HAVE_UST
+#include <ust/lttng-ust-ctl.h>
+#else
+#include "lttng-ust-ctl.h"
+#endif
+
+#include "channel.h"
+#include "event.h"
+#include "hashtable.h"
+#include "kernel-ctl.h"
+
+/*
+ * Setup a lttng_event used to enable *all* syscall tracing.
+ */
+static void init_syscalls_kernel_event(struct lttng_event *event)
+{
+ event->name[0] = '\0';
+ /*
+ * We use LTTNG_EVENT* here since the trace kernel creation will make the
+ * right changes for the kernel.
+ */
+ event->type = LTTNG_EVENT_SYSCALL;
+}
+
+/*
+ * Disable kernel tracepoint event for a channel from the kernel session.
+ */
+int event_kernel_disable_tracepoint(struct ltt_kernel_session *ksession,
+ struct ltt_kernel_channel *kchan, char *event_name)
+{
+ int ret;
+ struct ltt_kernel_event *kevent;
+
+ kevent = trace_kernel_get_event_by_name(event_name, kchan);
+ if (kevent == NULL) {
+ ret = LTTCOMM_NO_EVENT;
+ goto error;
+ }
+
+ ret = kernel_disable_event(kevent);
+ if (ret < 0) {
+ ret = LTTCOMM_KERN_DISABLE_FAIL;
+ goto error;
+ }
+
+ DBG("Kernel event %s disable for channel %s.",
+ kevent->event->name, kchan->channel->name);
+
+ ret = LTTCOMM_OK;
+
+error:
+ return ret;
+}
+
+/*
+ * Disable kernel tracepoint events for a channel from the kernel session.
+ */
+int event_kernel_disable_all_tracepoints(struct ltt_kernel_session *ksession,
+ struct ltt_kernel_channel *kchan)
+{
+ int ret;
+ struct ltt_kernel_event *kevent;
+
+ /* For each event in the kernel session */
+ cds_list_for_each_entry(kevent, &kchan->events_list.head, list) {
+ ret = kernel_disable_event(kevent);
+ if (ret < 0) {
+ /* We continue disabling the rest */
+ continue;
+ }
+ }
+ ret = LTTCOMM_OK;
+ return ret;
+}
+
+/*
+ * Disable kernel syscall events for a channel from the kernel session.
+ */
+int event_kernel_disable_all_syscalls(struct ltt_kernel_session *ksession,
+ struct ltt_kernel_channel *kchan)
+{
+ ERR("Cannot disable syscall tracing for existing session. Please destroy session instead.");
+ return LTTCOMM_OK; /* Return OK so disable all succeeds */
+}
+
+/*
+ * Disable all kernel event for a channel from the kernel session.
+ */
+int event_kernel_disable_all(struct ltt_kernel_session *ksession,
+ struct ltt_kernel_channel *kchan)
+{
+ int ret;
+
+ ret = event_kernel_disable_all_tracepoints(ksession, kchan);
+ if (ret != LTTCOMM_OK)
+ return ret;
+ ret = event_kernel_disable_all_syscalls(ksession, kchan);
+ return ret;
+}
+
+/*
+ * Enable kernel tracepoint event for a channel from the kernel session.
+ */
+int event_kernel_enable_tracepoint(struct ltt_kernel_session *ksession,
+ struct ltt_kernel_channel *kchan, struct lttng_event *event)
+{
+ int ret;
+ struct ltt_kernel_event *kevent;
+
+ kevent = trace_kernel_get_event_by_name(event->name, kchan);
+ if (kevent == NULL) {
+ ret = kernel_create_event(event, kchan);
+ if (ret < 0) {
+ if (ret == -EEXIST) {
+ ret = LTTCOMM_KERN_EVENT_EXIST;
+ } else {
+ ret = LTTCOMM_KERN_ENABLE_FAIL;
+ }
+ goto end;
+ }
+ } else if (kevent->enabled == 0) {
+ ret = kernel_enable_event(kevent);
+ if (ret < 0) {
+ ret = LTTCOMM_KERN_ENABLE_FAIL;
+ goto end;
+ }
+ }
+ ret = LTTCOMM_OK;
+end:
+ return ret;
+}
+
+/*
+ * Enable all kernel tracepoint events of a channel of the kernel session.
+ */
+int event_kernel_enable_all_tracepoints(struct ltt_kernel_session *ksession,
+ struct ltt_kernel_channel *kchan, int kernel_tracer_fd)
+{
+ int size, i, ret;
+ struct ltt_kernel_event *kevent;
+ struct lttng_event *event_list;
+
+ /* For each event in the kernel session */
+ cds_list_for_each_entry(kevent, &kchan->events_list.head, list) {
+ ret = kernel_enable_event(kevent);
+ if (ret < 0) {
+ /* Enable failed but still continue */
+ continue;
+ }
+ }
+
+ size = kernel_list_events(kernel_tracer_fd, &event_list);
+ if (size < 0) {
+ ret = LTTCOMM_KERN_LIST_FAIL;
+ goto end;
+ }
+
+ for (i = 0; i < size; i++) {
+ kevent = trace_kernel_get_event_by_name(event_list[i].name, kchan);
+ if (kevent == NULL) {
+ /* Default event type for enable all */
+ event_list[i].type = LTTNG_EVENT_TRACEPOINT;
+ /* Enable each single tracepoint event */
+ ret = kernel_create_event(&event_list[i], kchan);
+ if (ret < 0) {
+ /* Ignore error here and continue */
+ }
+ }
+ }
+ free(event_list);
+ ret = LTTCOMM_OK;
+end:
+ return ret;
+
+}
+
+/*
+ * Enable all kernel tracepoint events of a channel of the kernel session.
+ */
+int event_kernel_enable_all_syscalls(struct ltt_kernel_session *ksession,
+ struct ltt_kernel_channel *kchan, int kernel_tracer_fd)
+{
+ int ret;
+ struct lttng_event event;
+
+ init_syscalls_kernel_event(&event);
+
+ DBG("Enabling all syscall tracing");
+
+ ret = kernel_create_event(&event, kchan);
+ if (ret < 0) {
+ goto end;
+ }
+ ret = LTTCOMM_OK;
+end:
+ return ret;
+}
+
+/*
+ * Enable all kernel events of a channel of the kernel session.
+ */
+int event_kernel_enable_all(struct ltt_kernel_session *ksession,
+ struct ltt_kernel_channel *kchan, int kernel_tracer_fd)
+{
+ int ret;
+
+ ret = event_kernel_enable_all_tracepoints(ksession, kchan, kernel_tracer_fd);
+ if (ret != LTTCOMM_OK) {
+ goto end;
+ }
+ ret = event_kernel_enable_all_syscalls(ksession, kchan, kernel_tracer_fd);
+end:
+ return ret;
+}
+
+/*
+ * Enable UST tracepoint event for a channel from a UST session.
+ */
+#ifdef DISABLE
+int event_ust_enable_tracepoint(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
+{
+ int ret;
+ struct lttng_ust_event ltt_uevent;
+ struct object_data *obj_event;
+
+ strncpy(ltt_uevent.name, uevent->attr.name, sizeof(ltt_uevent.name));
+ ltt_uevent.name[sizeof(ltt_uevent.name) - 1] = '\0';
+ /* TODO: adjust to other instrumentation types */
+ ltt_uevent.instrumentation = LTTNG_UST_TRACEPOINT;
+
+ ret = ustctl_create_event(app->key.sock, <t_uevent,
+ uchan->obj, &obj_event);
+ if (ret < 0) {
+ DBG("Error ustctl create event %s for app pid: %d, sock: %d ret %d",
+ uevent->attr.name, app->key.pid, app->key.sock, ret);
+ goto next;
+ }
+
+ uevent->obj = obj_event;
+ uevent->handle = obj_event->handle;
+ uevent->enabled = 1;
+ ret = LTTCOMM_OK;
+end:
+ return ret;
+}
+#endif
+
+#ifdef DISABLE
+int event_ust_disable_tracepoint(struct ltt_ust_session *ustsession,
+ struct ltt_ust_channel *ustchan, char *event_name)
+{
+ int ret;
+ struct ltt_ust_event *ustevent;
+
+ ustevent = trace_ust_find_event_by_name(ustchan->events, event_name);
+ if (ustevent == NULL) {
+ ret = LTTCOMM_NO_EVENT;
+ goto end;
+ }
+ //ret = ustctl_disable(ustsession->sock, ustevent->obj);
+ if (ret < 0) {
+ ret = LTTCOMM_UST_ENABLE_FAIL;
+ goto end;
+ }
+ ustevent->enabled = 0;
+ ret = LTTCOMM_OK;
+end:
+ return ret;
+}
+#endif
projects / lttng-tools.git / blobdiff