[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>
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 7432f1a..26eecb8 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -843,7 +843,7 @@
nfs_inode_return_delegation(inode);
if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {
lock_kernel();
- inode->i_nlink--;
+ drop_nlink(inode);
nfs_complete_unlink(dentry);
unlock_kernel();
}
@@ -1401,7 +1401,7 @@
error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
/* The VFS may want to delete this inode */
if (error == 0)
- inode->i_nlink--;
+ drop_nlink(inode);
nfs_mark_for_revalidate(inode);
nfs_end_data_update(inode);
} else
@@ -1639,7 +1639,7 @@
goto out;
}
} else
- new_inode->i_nlink--;
+ drop_nlink(new_inode);
go_ahead:
/*