[PATCH] r/o bind mounts: monitor zeroing of i_nlink

Some filesystems, instead of simply decrementing i_nlink, simply zero it
during an unlink operation.  We need to catch these in addition to the
decrement operations.

Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index e21bb4668201..c1493524da4d 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -638,7 +638,7 @@ static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry)
         dput(ino->dentry);
 
         dentry->d_inode->i_size = 0;
-        dentry->d_inode->i_nlink = 0;
+        clear_nlink(dentry->d_inode);
 
         dir->i_mtime = CURRENT_TIME;
 
@@ -673,7 +673,7 @@ static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry)
         }
         dput(ino->dentry);
         dentry->d_inode->i_size = 0;
-        dentry->d_inode->i_nlink = 0;
+        clear_nlink(dentry->d_inode);
 
         if (dir->i_nlink)
                 drop_nlink(dir);