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| author |   Chuck Lever <chuck.lever@oracle.com> | 2017-01-22 14:04:29 -0500 |
|---|---|---|
| committer |   Trond Myklebust <trond.myklebust@primarydata.com> | 2017-01-24 12:50:47 -0500 |
| commit | 059aa734824165507c65fd30a55ff000afd14983 (patch) | |
| tree | 63defb4adb0656c4af72a05081b181b163f94b3e /include/linux/nfs4.h | |
| parent | NFSv4.1: Fix a deadlock in layoutget (diff) | |
| download | linux-dev-059aa734824165507c65fd30a55ff000afd14983.tar.xz linux-dev-059aa734824165507c65fd30a55ff000afd14983.zip | |
nfs: Don't increment lock sequence ID after NFS4ERR_MOVED
Xuan Qi reports that the Linux NFSv4 client failed to lock a file
that was migrated. The steps he observed on the wire:
1. The client sent a LOCK request to the source server
2. The source server replied NFS4ERR_MOVED
3. The client switched to the destination server
4. The client sent the same LOCK request to the destination
server with a bumped lock sequence ID
5. The destination server rejected the LOCK request with
NFS4ERR_BAD_SEQID
RFC 3530 section 8.1.5 provides a list of NFS errors which do not
bump a lock sequence ID.
However, RFC 3530 is now obsoleted by RFC 7530. In RFC 7530 section
9.1.7, this list has been updated by the addition of NFS4ERR_MOVED.
Reported-by: Xuan Qi <xuan.qi@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: stable@vger.kernel.org # v3.7+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'include/linux/nfs4.h')
| -rw-r--r-- | include/linux/nfs4.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h index bca536341d1a..1b1ca04820a3 100644 --- a/include/linux/nfs4.h +++ b/include/linux/nfs4.h @@ -282,7 +282,7 @@ enum nfsstat4 { static inline bool seqid_mutating_err(u32 err) { - /* rfc 3530 section 8.1.5: */ + /* See RFC 7530, section 9.1.7 */ switch (err) { case NFS4ERR_STALE_CLIENTID: case NFS4ERR_STALE_STATEID: @@ -291,6 +291,7 @@ static inline bool seqid_mutating_err(u32 err) case NFS4ERR_BADXDR: case NFS4ERR_RESOURCE: case NFS4ERR_NOFILEHANDLE: + case NFS4ERR_MOVED: return false; }; return true; |