sessiond: kernel triggers: add infrastructure to create event notifiers

[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 01af4a297652f7dff1e26202ca7a715741f66315..f5efaf328f08858c2eea3e135421218fac1bfc45 100644 (file)
--- a/src/common/kernel-ctl/kernel-ctl.c
+++ b/src/common/kernel-ctl/kernel-ctl.c
@@ -7,13 +7,14 @@
  *
  */
 
+#include "lttng/tracker.h"
 #define _LGPL_SOURCE
 #define __USE_LINUX_IOCTL_DEFS
 #include <sys/ioctl.h>
 #include <string.h>
 #include <common/align.h>
 #include <common/macros.h>
-#include <errno.h>
+#include <common/compat/errno.h>
 #include <stdarg.h>
 #include <assert.h>
 #include <common/time.h>
@@ -221,32 +222,32 @@ int kernctl_list_tracker_pids(int fd)
 }
 
 static enum lttng_kernel_tracker_type get_kernel_tracker_type(
-               enum lttng_tracker_type type)
+               enum lttng_process_attr process_attr)
 {
-       switch (type) {
-       case LTTNG_TRACKER_PID:
+       switch (process_attr) {
+       case LTTNG_PROCESS_ATTR_PROCESS_ID:
                return LTTNG_KERNEL_TRACKER_PID;
-       case LTTNG_TRACKER_VPID:
+       case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID:
                return LTTNG_KERNEL_TRACKER_VPID;
-       case LTTNG_TRACKER_UID:
+       case LTTNG_PROCESS_ATTR_USER_ID:
                return LTTNG_KERNEL_TRACKER_UID;
-       case LTTNG_TRACKER_VUID:
+       case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID:
                return LTTNG_KERNEL_TRACKER_VUID;
-       case LTTNG_TRACKER_GID:
+       case LTTNG_PROCESS_ATTR_GROUP_ID:
                return LTTNG_KERNEL_TRACKER_GID;
-       case LTTNG_TRACKER_VGID:
+       case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID:
                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)
+int kernctl_track_id(int fd, enum lttng_process_attr process_attr, int id)
 {
        struct lttng_kernel_tracker_args args;
 
        args.id = id;
-       args.type = get_kernel_tracker_type(tracker_type);
+       args.type = get_kernel_tracker_type(process_attr);
        if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) {
                errno = EINVAL;
                return -1;
@@ -254,12 +255,12 @@ int kernctl_track_id(int fd, enum lttng_tracker_type tracker_type, int id)
        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)
+int kernctl_untrack_id(int fd, enum lttng_process_attr process_attr, int id)
 {
        struct lttng_kernel_tracker_args args;
 
        args.id = id;
-       args.type = get_kernel_tracker_type(tracker_type);
+       args.type = get_kernel_tracker_type(process_attr);
        if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) {
                errno = EINVAL;
                return -1;
@@ -267,12 +268,12 @@ int kernctl_untrack_id(int fd, enum lttng_tracker_type tracker_type, int id)
        return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_UNTRACK_ID, &args);
 }
 
-int kernctl_list_tracker_ids(int fd, enum lttng_tracker_type tracker_type)
+int kernctl_list_tracker_ids(int fd, enum lttng_process_attr process_attr)
 {
        struct lttng_kernel_tracker_args args;
 
        args.id = -1;
-       args.type = get_kernel_tracker_type(tracker_type);
+       args.type = get_kernel_tracker_type(process_attr);
        if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) {
                errno = EINVAL;
                return -1;
@@ -417,7 +418,26 @@ int kernctl_stop_session(int fd)
                        LTTNG_KERNEL_SESSION_STOP);
 }
 
-int kernctl_filter(int fd, struct lttng_filter_bytecode *filter)
+int kernctl_create_event_notifier_group(int fd)
+{
+       return LTTNG_IOCTL_NO_CHECK(fd,
+                       LTTNG_KERNEL_EVENT_NOTIFIER_GROUP_CREATE);
+}
+
+int kernctl_create_event_notifier_group_notification_fd(int group_fd)
+{
+       return LTTNG_IOCTL_NO_CHECK(group_fd,
+                       LTTNG_KERNEL_EVENT_NOTIFIER_GROUP_NOTIFICATION_FD);
+}
+
+int kernctl_create_event_notifier(int group_fd,
+               const struct lttng_kernel_event_notifier *event_notifier)
+{
+       return LTTNG_IOCTL_NO_CHECK(group_fd,
+                       LTTNG_KERNEL_EVENT_NOTIFIER_CREATE, event_notifier);
+}
+
+int kernctl_filter(int fd, const struct lttng_filter_bytecode *filter)
 {
        struct lttng_kernel_filter_bytecode *kb;
        uint32_t len;
@@ -509,6 +529,13 @@ int kernctl_buffer_clear(int fd)
        return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_CLEAR);
 }
 
+int kernctl_get_next_subbuf_metadata_check(int fd, bool *consistent)
+{
+       return LTTNG_IOCTL_NO_CHECK(fd,
+                       RING_RING_BUFFER_GET_NEXT_SUBBUF_METADATA_CHECK,
+                       consistent);
+}
+
 /* returns the version of the metadata. */
 int kernctl_get_metadata_version(int fd, uint64_t *version)
 {