KATO Takenori 6db918e371 Fix `lockmgr: locking against myself' panic by multi union mount of ... same directory pair. If we do: mount -t union a b mount -t union a b then, (1) namei tries to lock fs which has been already locked by first union mount and (2) union_root() tries to lock locked fs. To avoid first deadlock condition, unlock vnode if lowerrootvp is union node, and to avoid second case, union_mount returns EDEADLK when multi union mount is detected.		1997-04-14 10:52:25 +00:00
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union.h	Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not	1997-02-22 09:48:43 +00:00
union_subr.c	The path name buffer, cn->cn_pnbuf, is FREEed by VOP_MKDIR when	1997-04-13 06:27:09 +00:00
union_vfsops.c	Fix `lockmgr: locking against myself' panic by multi union mount of	1997-04-14 10:52:25 +00:00
union_vnops.c	Fix locking violation when accessing `..'.	1997-04-14 05:13:55 +00:00