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| author | J. Bruce Fields <bfields@redhat.com> | 2011-09-02 09:03:37 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2011-09-02 19:59:24 -0400 |
| commit | 7a8711c9a6e2299c324c153da6e3381b1fd56128 (patch) | |
| tree | 720bb67f3ad17fac618bc8bf99dd13bea4b48cd8 | |
| parent | 16d259418b7c0dda79b71bfbfeaedc0ba4035f23 (diff) | |
| download | linux-7a8711c9a6e2299c324c153da6e3381b1fd56128.tar.bz2 | |
nfsd4: share common seqid checks
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| -rw-r--r-- | fs/nfsd/nfs4state.c | 41 |
1 files changed, 21 insertions, 20 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index a47bf884726f..8edc9ad63ea6 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -2456,6 +2456,16 @@ static const struct lock_manager_operations nfsd_lease_mng_ops = { .lm_change = nfsd_change_deleg_cb, }; +static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) +{ + if (nfsd4_has_session(cstate)) + return nfs_ok; + if (seqid == so->so_seqid - 1) + return nfserr_replay_me; + if (seqid == so->so_seqid) + return nfs_ok; + return nfserr_bad_seqid; +} __be32 nfsd4_process_open1(struct nfsd4_compound_state *cstate, @@ -2465,6 +2475,7 @@ nfsd4_process_open1(struct nfsd4_compound_state *cstate, struct nfs4_client *clp = NULL; unsigned int strhashval; struct nfs4_stateowner *sop = NULL; + __be32 status; if (!check_name(open->op_owner)) return nfserr_inval; @@ -2482,9 +2493,6 @@ nfsd4_process_open1(struct nfsd4_compound_state *cstate, return nfserr_expired; goto renew; } - /* When sessions are used, skip open sequenceid processing */ - if (nfsd4_has_session(cstate)) - goto renew; if (!sop->so_confirmed) { /* Replace unconfirmed owners without checking for replay. */ clp = sop->so_client; @@ -2492,10 +2500,9 @@ nfsd4_process_open1(struct nfsd4_compound_state *cstate, open->op_stateowner = NULL; goto renew; } - if (open->op_seqid == sop->so_seqid - 1) - return nfserr_replay_me; - if (open->op_seqid != sop->so_seqid) - return nfserr_bad_seqid; + status = nfsd4_check_seqid(cstate, sop, open->op_seqid); + if (status) + return status; renew: if (open->op_stateowner == NULL) { sop = alloc_init_open_stateowner(strhashval, clp, open); @@ -3411,7 +3418,10 @@ nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, if (sop == NULL) return nfserr_expired; cstate->replay_owner = sop; - goto check_replay; + status = nfsd4_check_seqid(cstate, sop, seqid); + if (status) + return status; + return nfserr_bad_seqid; } *stpp = stp; @@ -3423,8 +3433,9 @@ nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, return nfserr_bad_stateid; } - if (!nfsd4_has_session(cstate) && seqid != sop->so_seqid) - goto check_replay; + status = nfsd4_check_seqid(cstate, sop, seqid); + if (status) + return status; if (sop->so_confirmed && flags & CONFIRM) { dprintk("NFSD: preprocess_seqid_op: expected" @@ -3441,16 +3452,6 @@ nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, return status; renew_client(sop->so_client); return nfs_ok; - -check_replay: - if (seqid == sop->so_seqid - 1) { - dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); - /* indicate replay to calling function */ - return nfserr_replay_me; - } - dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", - sop->so_seqid, seqid); - return nfserr_bad_seqid; } __be32 |