[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/vfat/namei.c b/fs/vfat/namei.c
index 5846ba2d5d9f..edb711ff7b05 100644
--- a/fs/vfat/namei.c
+++ b/fs/vfat/namei.c
@@ -784,7 +784,7 @@ static int vfat_rmdir(struct inode *dir, struct dentry *dentry)
                 goto out;
         drop_nlink(dir);
 
-        inode->i_nlink = 0;
+        clear_nlink(inode);
         inode->i_mtime = inode->i_atime = CURRENT_TIME_SEC;
         fat_detach(inode);
 out:
@@ -808,7 +808,7 @@ static int vfat_unlink(struct inode *dir, struct dentry *dentry)
         err = fat_remove_entries(dir, &sinfo);  /* and releases bh */
         if (err)
                 goto out;
-        inode->i_nlink = 0;
+        clear_nlink(inode);
         inode->i_mtime = inode->i_atime = CURRENT_TIME_SEC;
         fat_detach(inode);
 out: