[PATCH] r/o bind mounts: unlink: monitor i_nlink

When a filesystem decrements i_nlink to zero, it means that a write must be
performed in order to drop the inode from the filesystem.

We're shortly going to have keep filesystems from being remounted r/o between
the time that this i_nlink decrement and that write occurs.

So, add a little helper function to do the decrements.  We'll tie into it in a
bit to note when i_nlink hits zero.

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/coda/dir.c b/fs/coda/dir.c
index 8651ea6a23b7..0a2fd8bb7579 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -367,7 +367,7 @@ int coda_unlink(struct inode *dir, struct dentry *de)
         }
 
         coda_dir_changed(dir, 0);
-        de->d_inode->i_nlink--;
+        drop_nlink(de->d_inode);
         unlock_kernel();
 
         return 0;
@@ -394,7 +394,7 @@ int coda_rmdir(struct inode *dir, struct dentry *de)
         }
 
         coda_dir_changed(dir, -1);
-        de->d_inode->i_nlink--;
+        drop_nlink(de->d_inode);
         d_delete(de);
         unlock_kernel();