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NFSv4.1: Select the "most recent locking state" for read/write/setattr stateids

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Follow the practice described in section 8.2.2 of RFC5661: When sending a
read/write or setattr stateid, set the seqid field to zero in order to
signal that the NFS server should apply the most recent locking state.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2013-03-17 15:31:15 -04:00
parent 39c6daae70
commit 3b66486c4c
3 changed files with 5 additions and 1 deletions
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3
fs/nfs/nfs4proc.c
View File

@ -6841,7 +6841,8 @@ static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
.init_caps = NFS_CAP_READDIRPLUS
| NFS_CAP_ATOMIC_OPEN
| NFS_CAP_CHANGE_ATTR
| NFS_CAP_POSIX_LOCK,
| NFS_CAP_POSIX_LOCK
| NFS_CAP_STATEID_NFSV41,
.call_sync = nfs4_call_sync_sequence,
.match_stateid = nfs41_match_stateid,
.find_root_sec = nfs41_find_root_sec,

2
fs/nfs/nfs4state.c
View File

@ -1053,6 +1053,8 @@ int nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state,
goto out;
ret = nfs4_copy_open_stateid(dst, state);
out:
if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41))
dst->seqid = 0;
return ret;
}

1
include/linux/nfs_fs_sb.h
View File

@ -197,5 +197,6 @@ struct nfs_server {
#define NFS_CAP_MTIME (1U << 13)
#define NFS_CAP_POSIX_LOCK (1U << 14)
#define NFS_CAP_UIDGID_NOMAP (1U << 15)
#define NFS_CAP_STATEID_NFSV41 (1U << 16)
#endif