fanotify: groups can specify their f_flags for new fd
Currently fanotify fds opened for thier listeners are done with f_flags
equal to O_RDONLY | O_LARGEFILE. This patch instead takes f_flags from the
fanotify_init syscall and uses those when opening files in the context of
the listener.
Signed-off-by: Eric Paris <eparis@redhat.com>
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index da01091..7182c83 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -81,7 +81,7 @@
* are NULL; That's fine, just don't call dentry open */
if (dentry && mnt)
new_file = dentry_open(dentry, mnt,
- O_RDONLY | O_LARGEFILE | FMODE_NONOTIFY,
+ group->fanotify_data.f_flags | FMODE_NONOTIFY,
current_cred());
else
new_file = ERR_PTR(-EOVERFLOW);
@@ -625,9 +625,6 @@
pr_debug("%s: flags=%d event_f_flags=%d\n",
__func__, flags, event_f_flags);
- if (event_f_flags)
- return -EINVAL;
-
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
@@ -645,6 +642,7 @@
if (IS_ERR(group))
return PTR_ERR(group);
+ group->fanotify_data.f_flags = event_f_flags;
#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
mutex_init(&group->fanotify_data.access_mutex);
init_waitqueue_head(&group->fanotify_data.access_waitq);