fanotify: Add pids to events

Pass the process identifiers of the triggering processes to fanotify
listeners: this information is useful for event filtering and logging.

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Eric Paris <eparis@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index 066f1f988bac..7fc8d004084c 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -93,6 +93,7 @@ void fsnotify_put_event(struct fsnotify_event *event)
                 BUG_ON(!list_empty(&event->private_data_list));
 
                 kfree(event->file_name);
+                put_pid(event->tgid);
                 kmem_cache_free(fsnotify_event_cachep, event);
         }
 }
@@ -346,6 +347,7 @@ struct fsnotify_event *fsnotify_clone_event(struct fsnotify_event *old_event)
                         return NULL;
                 }
         }
+        event->tgid = get_pid(old_event->tgid);
         if (event->data_type == FSNOTIFY_EVENT_PATH)
                 path_get(&event->path);
 
@@ -385,6 +387,7 @@ struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask,
                 event->name_len = strlen(event->file_name);
         }
 
+        event->tgid = get_pid(task_tgid(current));
         event->sync_cookie = cookie;
         event->to_tell = to_tell;
         event->data_type = data_type;