[PATCH =-v3 15/21] fanotify: send tgid with notification messages

[Eric Paris <eparis@redhat.com>]

Send tgid of original process to fanotify listeners

Signed-off-by: Eric Paris <eparis@redhat.com>
---

 fs/notify/fanotify.h     |    1 +
 fs/notify/notification.c |    2 ++
 include/linux/fanotify.h |    1 +
 3 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/fs/notify/fanotify.h b/fs/notify/fanotify.h
index 55b0bab..e6d7898 100644
--- a/fs/notify/fanotify.h
+++ b/fs/notify/fanotify.h
@@ -49,6 +49,7 @@ struct fanotify_event {
 	/* if waiting for a userspace access answer this is the cookie they will send back */
 	unsigned long cookie;
 	pid_t pid;		/* pid of the original process */
+	pid_t tgid;		/* tgid of the original process */
 	spinlock_t response_lock; /* protects response */
 	unsigned int response;	/* userspace answer to question */
 };
diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index da2045a..acd13b0 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -182,6 +182,7 @@ struct fanotify_event *create_event(struct file *file, unsigned int mask)
 	event->mask = mask;
 
 	event->pid = current->pid;
+	event->tgid = current->tgid;
 
 	WARN_ON(!event->path.dentry);
 	WARN_ON(!event->path.mnt);
@@ -248,6 +249,7 @@ int fanotify_create_event_fd(struct fanotify_group *group, struct fanotify_event
 	data->mask = event->mask;
 	data->cookie = event->cookie;
 	data->pid = event->pid;
+	data->tgid = event->tgid;
 
 	fanotify_put_event(event);
 
diff --git a/include/linux/fanotify.h b/include/linux/fanotify.h
index a5cded3..6cbcfc3 100644
--- a/include/linux/fanotify.h
+++ b/include/linux/fanotify.h
@@ -67,6 +67,7 @@ struct fanotify_event_metadata {
 	__u32 mask;
 	__u64 cookie;
 	pid_t pid;
+	pid_t tgid;
 }  __attribute__((packed));
 
 /* fanotify getsockopt optvals */