configfs: call fsnotify_rmdir() hook

This will allow generating fsnotify delete events on unregister
of group/subsystem after the fsnotify_nameremove() hook is removed
from d_delete().

The rest of the d_delete() calls from this filesystem are either
called recursively from within debugfs_unregister_{group,subsystem},
called from a vfs function that already has delete hooks or are
called from shutdown/cleanup code.

Cc: Joel Becker <jlbec@evilplan.org>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 5e7932d668ab74b87e063af86694ff4de3cdc924..ba17881a8d84823e1ab8600ca86d57c3d823ee5e 100644 (file)
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -27,6 +27,7 @@
 #undef DEBUG
 
 #include <linux/fs.h>
+#include <linux/fsnotify.h>
 #include <linux/mount.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -1804,6 +1805,7 @@ void configfs_unregister_group(struct config_group *group)
        configfs_detach_group(&group->cg_item);
        d_inode(dentry)->i_flags |= S_DEAD;
        dont_mount(dentry);
+       fsnotify_rmdir(d_inode(parent), dentry);
        d_delete(dentry);
        inode_unlock(d_inode(parent));
 
@@ -1932,6 +1934,7 @@ void configfs_unregister_subsystem(struct configfs_subsystem *subsys)
        configfs_detach_group(&group->cg_item);
        d_inode(dentry)->i_flags |= S_DEAD;
        dont_mount(dentry);
+       fsnotify_rmdir(d_inode(root), dentry);
        inode_unlock(d_inode(dentry));
 
        d_delete(dentry);