diff options
| -rw-r--r-- | fs/nfsd/nfs4callback.c | 122 | ||||
| -rw-r--r-- | fs/nfsd/state.h | 2 |
2 files changed, 88 insertions, 36 deletions
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index a49201835a97..e7f50c4081d6 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -435,12 +435,12 @@ static int decode_cb_sequence4resok(struct xdr_stream *xdr, */ status = 0; out: - if (status) - nfsd4_mark_cb_fault(cb->cb_clp, status); + cb->cb_seq_status = status; return status; out_overflow: print_overflow_msg(__func__, xdr); - return -EIO; + status = -EIO; + goto out; } static int decode_cb_sequence4res(struct xdr_stream *xdr, @@ -451,11 +451,10 @@ static int decode_cb_sequence4res(struct xdr_stream *xdr, if (cb->cb_minorversion == 0) return 0; - status = decode_cb_op_status(xdr, OP_CB_SEQUENCE, &cb->cb_status); - if (unlikely(status || cb->cb_status)) + status = decode_cb_op_status(xdr, OP_CB_SEQUENCE, &cb->cb_seq_status); + if (unlikely(status || cb->cb_seq_status)) return status; - cb->cb_update_seq_nr = true; return decode_cb_sequence4resok(xdr, cb); } @@ -527,7 +526,7 @@ static int nfs4_xdr_dec_cb_recall(struct rpc_rqst *rqstp, if (cb != NULL) { status = decode_cb_sequence4res(xdr, cb); - if (unlikely(status || cb->cb_status)) + if (unlikely(status || cb->cb_seq_status)) return status; } @@ -617,7 +616,7 @@ static int nfs4_xdr_dec_cb_layout(struct rpc_rqst *rqstp, if (cb) { status = decode_cb_sequence4res(xdr, cb); - if (unlikely(status || cb->cb_status)) + if (unlikely(status || cb->cb_seq_status)) return status; } return decode_cb_op_status(xdr, OP_CB_LAYOUTRECALL, &cb->cb_status); @@ -876,7 +875,11 @@ static void nfsd4_cb_prepare(struct rpc_task *task, void *calldata) u32 minorversion = clp->cl_minorversion; cb->cb_minorversion = minorversion; - cb->cb_update_seq_nr = false; + /* + * cb_seq_status is only set in decode_cb_sequence4res, + * and so will remain 1 if an rpc level failure occurs. + */ + cb->cb_seq_status = 1; cb->cb_status = 0; if (minorversion) { if (!nfsd41_cb_get_slot(clp, task)) @@ -885,15 +888,30 @@ static void nfsd4_cb_prepare(struct rpc_task *task, void *calldata) rpc_call_start(task); } -static void nfsd4_cb_done(struct rpc_task *task, void *calldata) +static bool nfsd4_cb_sequence_done(struct rpc_task *task, struct nfsd4_callback *cb) { - struct nfsd4_callback *cb = calldata; struct nfs4_client *clp = cb->cb_clp; + struct nfsd4_session *session = clp->cl_cb_session; + bool ret = true; - dprintk("%s: minorversion=%d\n", __func__, - clp->cl_minorversion); + if (!clp->cl_minorversion) { + /* + * If the backchannel connection was shut down while this + * task was queued, we need to resubmit it after setting up + * a new backchannel connection. + * + * Note that if we lost our callback connection permanently + * the submission code will error out, so we don't need to + * handle that case here. + */ + if (task->tk_flags & RPC_TASK_KILLED) + goto need_restart; + + return true; + } - if (clp->cl_minorversion) { + switch (cb->cb_seq_status) { + case 0: /* * No need for lock, access serialized in nfsd4_cb_prepare * @@ -901,29 +919,63 @@ static void nfsd4_cb_done(struct rpc_task *task, void *calldata) * If CB_SEQUENCE returns an error, then the state of the slot * (sequence ID, cached reply) MUST NOT change. */ - if (cb->cb_update_seq_nr) - ++clp->cl_cb_session->se_cb_seq_nr; - - clear_bit(0, &clp->cl_cb_slot_busy); - rpc_wake_up_next(&clp->cl_cb_waitq); - dprintk("%s: freed slot, new seqid=%d\n", __func__, - clp->cl_cb_session->se_cb_seq_nr); + ++session->se_cb_seq_nr; + break; + case -ESERVERFAULT: + ++session->se_cb_seq_nr; + case 1: + case -NFS4ERR_BADSESSION: + nfsd4_mark_cb_fault(cb->cb_clp, cb->cb_seq_status); + ret = false; + break; + case -NFS4ERR_DELAY: + if (!rpc_restart_call(task)) + goto out; + + rpc_delay(task, 2 * HZ); + return false; + case -NFS4ERR_BADSLOT: + goto retry_nowait; + case -NFS4ERR_SEQ_MISORDERED: + if (session->se_cb_seq_nr != 1) { + session->se_cb_seq_nr = 1; + goto retry_nowait; + } + break; + default: + dprintk("%s: unprocessed error %d\n", __func__, + cb->cb_seq_status); } - /* - * If the backchannel connection was shut down while this - * task was queued, we need to resubmit it after setting up - * a new backchannel connection. - * - * Note that if we lost our callback connection permanently - * the submission code will error out, so we don't need to - * handle that case here. - */ - if (task->tk_flags & RPC_TASK_KILLED) { - task->tk_status = 0; - cb->cb_need_restart = true; + clear_bit(0, &clp->cl_cb_slot_busy); + rpc_wake_up_next(&clp->cl_cb_waitq); + dprintk("%s: freed slot, new seqid=%d\n", __func__, + clp->cl_cb_session->se_cb_seq_nr); + + if (task->tk_flags & RPC_TASK_KILLED) + goto need_restart; +out: + return ret; +retry_nowait: + if (rpc_restart_call_prepare(task)) + ret = false; + goto out; +need_restart: + task->tk_status = 0; + cb->cb_need_restart = true; + return false; +} + +static void nfsd4_cb_done(struct rpc_task *task, void *calldata) +{ + struct nfsd4_callback *cb = calldata; + struct nfs4_client *clp = cb->cb_clp; + + dprintk("%s: minorversion=%d\n", __func__, + clp->cl_minorversion); + + if (!nfsd4_cb_sequence_done(task, cb)) return; - } if (cb->cb_status) { WARN_ON_ONCE(task->tk_status); @@ -1099,8 +1151,8 @@ void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp, cb->cb_msg.rpc_resp = cb; cb->cb_ops = ops; INIT_WORK(&cb->cb_work, nfsd4_run_cb_work); + cb->cb_seq_status = 1; cb->cb_status = 0; - cb->cb_update_seq_nr = false; cb->cb_need_restart = false; } diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index 4874ce515fc1..583ffc13cae2 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -67,8 +67,8 @@ struct nfsd4_callback { struct rpc_message cb_msg; struct nfsd4_callback_ops *cb_ops; struct work_struct cb_work; + int cb_seq_status; int cb_status; - bool cb_update_seq_nr; bool cb_need_restart; }; |