[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/reiserfs/namei.c b/fs/reiserfs/namei.c
index cf92e89515f..16e9cff8f15 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -913,7 +913,7 @@ static int reiserfs_rmdir(struct inode *dir, struct dentry *dentry)
                 reiserfs_warning(inode->i_sb, "%s: empty directory has nlink "
                                  "!= 2 (%d)", __FUNCTION__, inode->i_nlink);
 
-        inode->i_nlink = 0;
+        clear_nlink(inode);
         inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
         reiserfs_update_sd(&th, inode);
 
@@ -1473,7 +1473,7 @@ static int reiserfs_rename(struct inode *old_dir, struct dentry *old_dentry,
         if (new_dentry_inode) {
                 // adjust link number of the victim
                 if (S_ISDIR(new_dentry_inode->i_mode)) {
-                        new_dentry_inode->i_nlink = 0;
+                        clear_nlink(new_dentry_inode);
                 } else {
                         drop_nlink(new_dentry_inode);
                 }