[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/qnx4/namei.c b/fs/qnx4/namei.c
index c3d83f6..ad5afa4 100644
--- a/fs/qnx4/namei.c
+++ b/fs/qnx4/namei.c
@@ -189,8 +189,7 @@
inode->i_nlink = 0;
mark_inode_dirty(inode);
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
- dir->i_nlink--;
- mark_inode_dirty(dir);
+ inode_dec_link_count(dir);
retval = 0;
end_rmdir:
@@ -234,9 +233,8 @@
mark_buffer_dirty(bh);
dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
mark_inode_dirty(dir);
- inode->i_nlink--;
inode->i_ctime = dir->i_ctime;
- mark_inode_dirty(inode);
+ inode_dec_link_count(inode);
retval = 0;
end_unlink: