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Commit c9778a98 authored by Eric Paris's avatar Eric Paris
Browse files

fanotify: allow ignored_masks to survive modify 



Some users may want to truely ignore an inode even if it has been modified.
Say you are wanting a mount which contains a log file and you really don't
want any notification about that file.  This patch allows the listener to
do that.

Signed-off-by: default avatarEric Paris <eparis@redhat.com>
parent c908370f

fs/notify/fanotify/fanotify_user.c

+2 −0
Original line number Diff line number Diff line
@@ -375,6 +375,8 @@ static __u32 fanotify_mark_add_to_mask(struct fsnotify_mark *fsn_mark, 
	} else {

		oldmask = fsn_mark->ignored_mask;

		fsnotify_set_mark_ignored_mask_locked(fsn_mark, (oldmask | mask));

		if (flags & FAN_MARK_IGNORED_SURV_MODIFY)

			fsn_mark->flags |= FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY;

	}

	spin_unlock(&fsn_mark->lock);

include/linux/fanotify.h

+3 −1
Original line number Diff line number Diff line
@@ -31,13 +31,15 @@ 
#define FAN_MARK_ONLYDIR	0x00000008

#define FAN_MARK_MOUNT		0x00000010

#define FAN_MARK_IGNORED_MASK	0x00000020

#define FAN_MARK_IGNORED_SURV_MODIFY	0x00000040



#define FAN_ALL_MARK_FLAGS	(FAN_MARK_ADD |\

				 FAN_MARK_REMOVE |\

				 FAN_MARK_DONT_FOLLOW |\

				 FAN_MARK_ONLYDIR |\

				 FAN_MARK_MOUNT |\

				 FAN_MARK_IGNORED_MASK)

				 FAN_MARK_IGNORED_MASK |\

				 FAN_MARK_IGNORED_SURV_MODIFY)



/*

 * All of the events - we build the list by hand so that we can add flags in