svn commit: r224534 - stable/8/sys/fs/nfs

[Rick Macklem]

Author: rmacklem
Date: Sat Jul 30 23:42:15 2011
New Revision: 224534
URL: http://svn.freebsd.org/changeset/base/224534

Log:
  MFC: r224117
  The new NFSv4 client handled NFSERR_GRACE as a fatal error
  for the remove and rename operations. Some NFSv4 servers will
  report NFSERR_GRACE for these operations. This patch changes
  the behaviour of the client so that it handles NFSERR_GRACE
  like NFSERR_DELAY for non-state related operations like
  remove and rename. It also exempts the delegreturn operation
  from handling within newnfs_request() for NFSERR_DELAY/NFSERR_GRACE
  so that it can handle NFSERR_GRACE in the same manner as before.
  This problem was resolved thanks to discussion with bfields at fieldses.org.
  The problem was identified at the recent NFSv4 ineroperability
  bakeathon.

Modified:
  stable/8/sys/fs/nfs/nfs_commonkrpc.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)

Modified: stable/8/sys/fs/nfs/nfs_commonkrpc.c
==============================================================================
--- stable/8/sys/fs/nfs/nfs_commonkrpc.c	Sat Jul 30 23:09:52 2011	(r224533)
+++ stable/8/sys/fs/nfs/nfs_commonkrpc.c	Sat Jul 30 23:42:15 2011	(r224534)
@@ -666,8 +666,10 @@ tryagain:
 		NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 		nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl);
 		if (nd->nd_repstat != 0) {
-			if ((nd->nd_repstat == NFSERR_DELAY &&
+			if (((nd->nd_repstat == NFSERR_DELAY ||
+			      nd->nd_repstat == NFSERR_GRACE) &&
 			     (nd->nd_flag & ND_NFSV4) &&
+			     nd->nd_procnum != NFSPROC_DELEGRETURN &&
 			     nd->nd_procnum != NFSPROC_SETATTR &&
 			     nd->nd_procnum != NFSPROC_READ &&
 			     nd->nd_procnum != NFSPROC_WRITE &&