Author: rmacklem
Date: Sun Dec 29 23:56:31 2019
New Revision: 356189
URL: https://svnweb.freebsd.org/changeset/base/356189
Log:
MFC: r355509
Fix kernel handling of a NFSERR_MINORVERSMISMATCH NFSv4 server reply.
When an NFSv4 server replies NFSERR_MINORVERSMISMATCH, it does not generate
a status result for the first operation in the compound. Without this
patch, this will result in a bogus EBADXDR error return.
Returning EBADXDR is relatively harmless, but a correct reply of
NFSERR_MINORVERSMISMATCH is needed by the pNFS client to select the correct
minor version to use for a File Layout DS now that there can be NFSv4.2
DS servers.
mount_nfs.c still needs to be fixed for this, although how the mount fails
is only useful to help sysadmins isolate why a mount fails.
Found during testing of the NFSv4.2 client and server.
Modified:
stable/11/sys/fs/nfs/nfs_commonkrpc.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/fs/nfs/nfs_commonkrpc.c
==============================================================================
--- stable/11/sys/fs/nfs/nfs_commonkrpc.c Sun Dec 29 23:48:48 2019
(r356188)
+++ stable/11/sys/fs/nfs/nfs_commonkrpc.c Sun Dec 29 23:56:31 2019
(r356189)
@@ -831,7 +831,8 @@ tryagain:
* Get rid of the tag, return count and SEQUENCE result for
* NFSv4.
*/
- if ((nd->nd_flag & ND_NFSV4) != 0) {
+ if ((nd->nd_flag & ND_NFSV4) != 0 && nd->nd_repstat !=
+ NFSERR_MINORVERMISMATCH) {
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
i = fxdr_unsigned(int, *tl);
error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
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