udf: Avoid dir link count to go negative



If we are writing back inode of unlinked directory, its link count ends
up being (u16)-1. Although the inode is deleted, udf_iget() can load the
inode when NFS uses stale file handle and get confused.

Signed-off-by: Jan Kara <jack@suse.cz>

parent 44bf091f

fs/udf/inode.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1664,7 +1664,7 @@ static int udf_update_inode(struct inode *inode, int do_sync)
		FE_PERM_U_DELETE \| FE_PERM_U_CHATTR));
		fe->permissions = cpu_to_le32(udfperms);

		if (S_ISDIR(inode->i_mode))
		if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0)
		fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
		else
		fe->fileLinkCount = cpu_to_le16(inode->i_nlink);