tree 5a6115e18ee105246d46e3db3d5b07749d232f5b
parent aab520e2f6c80160cabd187a8d0292d1cec8ff68
author Dave Hansen <haveblue@us.ibm.com> 1159684143 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1159688370 -0700

[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>