Date: Wed, 7 Mar 2012 08:02:44 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r232644 - stable/9/sys/fs/nullfs Message-ID: <201203070802.q2782iQ6081993@svn.freebsd.org>
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Author: kib Date: Wed Mar 7 08:02:43 2012 New Revision: 232644 URL: http://svn.freebsd.org/changeset/base/232644 Log: MFC r232301: Always request exclusive lock for the lower vnode in nullfs_vget(). The null_nodeget() requires exclusive lock on lowervp to be able to insmntque() new vnode. Modified: stable/9/sys/fs/nullfs/null_vfsops.c Directory Properties: stable/9/sys/ (props changed) Modified: stable/9/sys/fs/nullfs/null_vfsops.c ============================================================================== --- stable/9/sys/fs/nullfs/null_vfsops.c Wed Mar 7 07:59:30 2012 (r232643) +++ stable/9/sys/fs/nullfs/null_vfsops.c Wed Mar 7 08:02:43 2012 (r232644) @@ -307,6 +307,12 @@ nullfs_vget(mp, ino, flags, vpp) struct vnode **vpp; { int error; + + KASSERT((flags & LK_TYPE_MASK) != 0, + ("nullfs_vget: no lock requested")); + flags &= ~LK_TYPE_MASK; + flags |= LK_EXCLUSIVE; + error = VFS_VGET(MOUNTTONULLMOUNT(mp)->nullm_vfs, ino, flags, vpp); if (error) return (error);
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