kern/92785: Using exported filesystem on OS/2 NFS client causes filesystem freeze

[Kostik Belousov]

The following reply was made to PR kern/92785; it has been noted by GNATS.

From: Kostik Belousov <kostikbel at gmail.com>
To: Ulrich Spoerlein <uspoerlein at gmail.com>
Cc: bug-followup at freebsd.org, Bruce Evans <bde at zeta.org.au>
Subject: Re: kern/92785: Using exported filesystem on OS/2 NFS client causes filesystem freeze
Date: Wed, 27 Dec 2006 18:17:07 +0200

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 On Wed, Dec 27, 2006 at 05:05:00PM +0100, Ulrich Spoerlein wrote:
 > Attached is the cumulative diff of the kernel I tested this with.
 > Tested filesystems needing patch: ufs, msdosfs, cd9660, ext2fs
 > Tested filesystems sans patch: reiserfs
 > Untested filesystems: udf, ntfs, smbfs, nwfs, (zfs?)
 
 The better change for UDF:
 
 Index: fs/udf/udf_vnops.c
 ===================================================================
 RCS file: /usr/local/arch/ncvs/src/sys/fs/udf/udf_vnops.c,v
 retrieving revision 1.61
 diff -u -r1.61 udf_vnops.c
 --- fs/udf/udf_vnops.c	3 Feb 2006 15:25:52 -0000	1.61
 +++ fs/udf/udf_vnops.c	27 Dec 2006 16:16:51 -0000
 @@ -915,7 +915,7 @@
  		if (flags & ISDOTDOT)
  			VOP_UNLOCK(dvp, 0, a->a_cnp->cn_thread);
  		error = udf_vget(udfmp->im_mountp, id, LK_EXCLUSIVE, &tdp);
 -		if (flags & ISDOTDOT)
 +		if ((flags & ISDOTDOT) && (dvp != tdp || error))
  			vn_lock(dvp, LK_EXCLUSIVE|LK_RETRY, a->a_cnp->cn_thread);
  		if (!error) {
  			/*
 
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