diff options
Diffstat (limited to 'fs/nfs/callback_proc.c')
| -rw-r--r-- | fs/nfs/callback_proc.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c index 3d7edd65577b..4062f7690a33 100644 --- a/fs/nfs/callback_proc.c +++ b/fs/nfs/callback_proc.c @@ -143,9 +143,8 @@ int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, const n * Return success if the sequenceID is one more than what we last saw on * this slot, accounting for wraparound. Increments the slot's sequence. * - * We don't yet implement a duplicate request cache, so at this time - * we will log replays, and process them as if we had not seen them before, - * but we don't bump the sequence in the slot. Not too worried about it, + * We don't yet implement a duplicate request cache, instead we set the + * back channel ca_maxresponsesize_cached to zero. This is OK for now * since we only currently implement idempotent callbacks anyway. * * We have a single slot backchannel at this time, so we don't bother @@ -174,9 +173,15 @@ validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args) /* Replay */ if (args->csa_sequenceid == slot->seq_nr) { - dprintk("%s seqid %d is a replay - no DRC available\n", + dprintk("%s seqid %d is a replay\n", __func__, args->csa_sequenceid); - return htonl(NFS4_OK); + /* Signal process_op to set this error on next op */ + if (args->csa_cachethis == 0) + return htonl(NFS4ERR_RETRY_UNCACHED_REP); + + /* The ca_maxresponsesize_cached is 0 with no DRC */ + else if (args->csa_cachethis == 1) + return htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE); } /* Wraparound */ @@ -319,9 +324,13 @@ out: kfree(args->csa_rclists[i].rcl_refcalls); kfree(args->csa_rclists); - dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); - res->csr_status = status; - return res->csr_status; + if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) + res->csr_status = 0; + else + res->csr_status = status; + dprintk("%s: exit with status = %d res->csr_status %d\n", __func__, + ntohl(status), ntohl(res->csr_status)); + return status; } unsigned nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy) |