SoW-2019-0002: Dynamic Snapshot

[lttng-tools.git] / src / common / kernel-ctl / kernel-ctl.c

diff --git a/src/common/kernel-ctl/kernel-ctl.c b/src/common/kernel-ctl/kernel-ctl.c
index 5f25adf02dc269debabcbdad5d04729ec0d46eb3..878929ff0ab0bd94c0df18a4435e21d9caed72cf 100644 (file)
--- a/src/common/kernel-ctl/kernel-ctl.c
+++ b/src/common/kernel-ctl/kernel-ctl.c
@@ -1,20 +1,10 @@
 /*
- * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
- *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *               2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
+ * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2 only,
- * as published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-only
  *
- * 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.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 #define _LGPL_SOURCE
@@ -230,6 +220,67 @@ int kernctl_list_tracker_pids(int fd)
        return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS);
 }
 
+static enum lttng_kernel_tracker_type get_kernel_tracker_type(
+               enum lttng_tracker_type type)
+{
+       switch (type) {
+       case LTTNG_TRACKER_PID:
+               return LTTNG_KERNEL_TRACKER_PID;
+       case LTTNG_TRACKER_VPID:
+               return LTTNG_KERNEL_TRACKER_VPID;
+       case LTTNG_TRACKER_UID:
+               return LTTNG_KERNEL_TRACKER_UID;
+       case LTTNG_TRACKER_VUID:
+               return LTTNG_KERNEL_TRACKER_VUID;
+       case LTTNG_TRACKER_GID:
+               return LTTNG_KERNEL_TRACKER_GID;
+       case LTTNG_TRACKER_VGID:
+               return LTTNG_KERNEL_TRACKER_VGID;
+       default:
+               return LTTNG_KERNEL_TRACKER_UNKNOWN;
+       }
+}
+
+int kernctl_track_id(int fd, enum lttng_tracker_type tracker_type, int id)
+{
+       struct lttng_kernel_tracker_args args;
+
+       args.id = id;
+       args.type = get_kernel_tracker_type(tracker_type);
+       if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) {
+               errno = EINVAL;
+               return -1;
+       }
+       return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_TRACK_ID, &args);
+}
+
+int kernctl_untrack_id(int fd, enum lttng_tracker_type tracker_type, int id)
+{
+       struct lttng_kernel_tracker_args args;
+
+       args.id = id;
+       args.type = get_kernel_tracker_type(tracker_type);
+       if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) {
+               errno = EINVAL;
+               return -1;
+       }
+       return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_UNTRACK_ID, &args);
+}
+
+int kernctl_list_tracker_ids(int fd, enum lttng_tracker_type tracker_type)
+{
+       struct lttng_kernel_tracker_args args;
+
+       args.id = -1;
+       args.type = get_kernel_tracker_type(tracker_type);
+       if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) {
+               errno = EINVAL;
+               return -1;
+       }
+       return LTTNG_IOCTL_NO_CHECK(
+                       fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_IDS, &args);
+}
+
 int kernctl_session_regenerate_metadata(int fd)
 {
        return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_METADATA_REGEN);
@@ -366,7 +417,22 @@ int kernctl_stop_session(int fd)
                        LTTNG_KERNEL_SESSION_STOP);
 }
 
-int kernctl_filter(int fd, struct lttng_filter_bytecode *filter)
+int kernctl_create_trigger_group(int fd)
+{
+               return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_TRIGGER_GROUP_CREATE);
+}
+
+int kernctl_create_trigger_group_notification_fd(int group_fd)
+{
+               return LTTNG_IOCTL_NO_CHECK(group_fd, LTTNG_KERNEL_TRIGGER_GROUP_NOTIFICATION_FD);
+}
+
+int kernctl_create_trigger(int group_fd, struct lttng_kernel_trigger *trigger)
+{
+               return LTTNG_IOCTL_NO_CHECK(group_fd, LTTNG_KERNEL_TRIGGER_CREATE, trigger);
+}
+
+int kernctl_filter(int fd, const struct lttng_filter_bytecode *filter)
 {
        struct lttng_kernel_filter_bytecode *kb;
        uint32_t len;