From: OGAWA Hirofumi Subject: Failure to fallback to nfsd-v3 (?) Date: Sun, 07 Feb 2010 12:32:04 +0900 Message-ID: <87pr4h67rf.fsf@devron.myhome.or.jp> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org To: "J. Bruce Fields" , Neil Brown Return-path: Sender: linux-kernel-owner@vger.kernel.org List-ID: Hi, I've recently noticed I couldn't mount nfs on 2.6.33-rc6. The environment is server (nfsd-v3, 2.6.33-rc6) <-> client (2.6.32.7, nfs-utils 1.2.1) And mount command is # mount server:/path /mntpoint (i.e. without any options. If I specified "vers=3" option, it works). With some debugging, it seems to change of the error code on nfsd - the log of failure is the following. nfsd_dispatch: vers 4 proc 0 nfsd_dispatch: vers 4 proc 1 nfsv4 compound op #1/3: 24 (OP_PUTROOTFH) nfsv4 compound op ffff88012d9e10c0 opcnt 3 #1: 24: status 30000 nfsv4 compound returned 30000 nfsd: Dropping request; may be revisited later found domain *.xxx.xx found fsidtype 1 found fsid length 4 Path seems to be <> nfsd_dispatch: vers 4 proc 1 nfsv4 compound op #1/3: 24 (OP_PUTROOTFH) nfsv4 compound op ffff88012dab6228 opcnt 3 #1: 24: status 10006 nfsv4 compound returned 10006 On the older kernel (2.6.32.7), it seems to fallback to nfsv3, nfsd_dispatch: vers 4 proc 0 nfsd_dispatch: vers 4 proc 1 nfsv4 compound op #1/3: 24 (OP_PUTROOTFH) nfsv4 compound op d9c04850 opcnt 3 #1: 24: status 2 nfsv4 compound returned 2 nfsd_dispatch: vers 3 proc 0 [...] And the following commit seems to change the behavior. [nfsd4: fix error return when pseudoroot missing] f39bde24b275ddc45df1ed835725b609e178c7a0 Well, anyway, is this a expected behavior change, or something bug? Thanks. -- OGAWA Hirofumi