diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/ptlrpc/niobuf.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/ptlrpc/niobuf.c | 728 |
1 files changed, 728 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/ptlrpc/niobuf.c b/drivers/staging/lustre/lustre/ptlrpc/niobuf.c new file mode 100644 index 000000000000..de3f0db0ba47 --- /dev/null +++ b/drivers/staging/lustre/lustre/ptlrpc/niobuf.c @@ -0,0 +1,728 @@ +/* + * GPL HEADER START + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + * GPL HEADER END + */ +/* + * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 2011, 2012, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + */ + +#define DEBUG_SUBSYSTEM S_RPC +#include <obd_support.h> +#include <lustre_net.h> +#include <lustre_lib.h> +#include <obd.h> +#include <obd_class.h> +#include "ptlrpc_internal.h" + +/** + * Helper function. Sends \a len bytes from \a base at offset \a offset + * over \a conn connection to portal \a portal. + * Returns 0 on success or error code. + */ +static int ptl_send_buf (lnet_handle_md_t *mdh, void *base, int len, + lnet_ack_req_t ack, struct ptlrpc_cb_id *cbid, + struct ptlrpc_connection *conn, int portal, __u64 xid, + unsigned int offset) +{ + int rc; + lnet_md_t md; + ENTRY; + + LASSERT (portal != 0); + LASSERT (conn != NULL); + CDEBUG (D_INFO, "conn=%p id %s\n", conn, libcfs_id2str(conn->c_peer)); + md.start = base; + md.length = len; + md.threshold = (ack == LNET_ACK_REQ) ? 2 : 1; + md.options = PTLRPC_MD_OPTIONS; + md.user_ptr = cbid; + md.eq_handle = ptlrpc_eq_h; + + if (unlikely(ack == LNET_ACK_REQ && + OBD_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_ACK, OBD_FAIL_ONCE))){ + /* don't ask for the ack to simulate failing client */ + ack = LNET_NOACK_REQ; + } + + rc = LNetMDBind (md, LNET_UNLINK, mdh); + if (unlikely(rc != 0)) { + CERROR ("LNetMDBind failed: %d\n", rc); + LASSERT (rc == -ENOMEM); + RETURN (-ENOMEM); + } + + CDEBUG(D_NET, "Sending %d bytes to portal %d, xid "LPD64", offset %u\n", + len, portal, xid, offset); + + rc = LNetPut (conn->c_self, *mdh, ack, + conn->c_peer, portal, xid, offset, 0); + if (unlikely(rc != 0)) { + int rc2; + /* We're going to get an UNLINK event when I unlink below, + * which will complete just like any other failed send, so + * I fall through and return success here! */ + CERROR("LNetPut(%s, %d, "LPD64") failed: %d\n", + libcfs_id2str(conn->c_peer), portal, xid, rc); + rc2 = LNetMDUnlink(*mdh); + LASSERTF(rc2 == 0, "rc2 = %d\n", rc2); + } + + RETURN (0); +} + +static void mdunlink_iterate_helper(lnet_handle_md_t *bd_mds, int count) +{ + int i; + + for (i = 0; i < count; i++) + LNetMDUnlink(bd_mds[i]); +} + + +/** + * Register bulk at the sender for later transfer. + * Returns 0 on success or error code. + */ +int ptlrpc_register_bulk(struct ptlrpc_request *req) +{ + struct ptlrpc_bulk_desc *desc = req->rq_bulk; + lnet_process_id_t peer; + int rc = 0; + int rc2; + int posted_md; + int total_md; + __u64 xid; + lnet_handle_me_t me_h; + lnet_md_t md; + ENTRY; + + if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_BULK_GET_NET)) + RETURN(0); + + /* NB no locking required until desc is on the network */ + LASSERT(desc->bd_nob > 0); + LASSERT(desc->bd_md_count == 0); + LASSERT(desc->bd_md_max_brw <= PTLRPC_BULK_OPS_COUNT); + LASSERT(desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES); + LASSERT(desc->bd_req != NULL); + LASSERT(desc->bd_type == BULK_PUT_SINK || + desc->bd_type == BULK_GET_SOURCE); + + /* cleanup the state of the bulk for it will be reused */ + if (req->rq_resend || req->rq_send_state == LUSTRE_IMP_REPLAY) + desc->bd_nob_transferred = 0; + else + LASSERT(desc->bd_nob_transferred == 0); + + desc->bd_failure = 0; + + peer = desc->bd_import->imp_connection->c_peer; + + LASSERT(desc->bd_cbid.cbid_fn == client_bulk_callback); + LASSERT(desc->bd_cbid.cbid_arg == desc); + + /* An XID is only used for a single request from the client. + * For retried bulk transfers, a new XID will be allocated in + * in ptlrpc_check_set() if it needs to be resent, so it is not + * using the same RDMA match bits after an error. + * + * For multi-bulk RPCs, rq_xid is the last XID needed for bulks. The + * first bulk XID is power-of-two aligned before rq_xid. LU-1431 */ + xid = req->rq_xid & ~((__u64)desc->bd_md_max_brw - 1); + LASSERTF(!(desc->bd_registered && + req->rq_send_state != LUSTRE_IMP_REPLAY) || + xid != desc->bd_last_xid, + "registered: %d rq_xid: "LPU64" bd_last_xid: "LPU64"\n", + desc->bd_registered, xid, desc->bd_last_xid); + + total_md = (desc->bd_iov_count + LNET_MAX_IOV - 1) / LNET_MAX_IOV; + desc->bd_registered = 1; + desc->bd_last_xid = xid; + desc->bd_md_count = total_md; + md.user_ptr = &desc->bd_cbid; + md.eq_handle = ptlrpc_eq_h; + md.threshold = 1; /* PUT or GET */ + + for (posted_md = 0; posted_md < total_md; posted_md++, xid++) { + md.options = PTLRPC_MD_OPTIONS | + ((desc->bd_type == BULK_GET_SOURCE) ? + LNET_MD_OP_GET : LNET_MD_OP_PUT); + ptlrpc_fill_bulk_md(&md, desc, posted_md); + + rc = LNetMEAttach(desc->bd_portal, peer, xid, 0, + LNET_UNLINK, LNET_INS_AFTER, &me_h); + if (rc != 0) { + CERROR("%s: LNetMEAttach failed x"LPU64"/%d: rc = %d\n", + desc->bd_export->exp_obd->obd_name, xid, + posted_md, rc); + break; + } + + /* About to let the network at it... */ + rc = LNetMDAttach(me_h, md, LNET_UNLINK, + &desc->bd_mds[posted_md]); + if (rc != 0) { + CERROR("%s: LNetMDAttach failed x"LPU64"/%d: rc = %d\n", + desc->bd_export->exp_obd->obd_name, xid, + posted_md, rc); + rc2 = LNetMEUnlink(me_h); + LASSERT(rc2 == 0); + break; + } + } + + if (rc != 0) { + LASSERT(rc == -ENOMEM); + spin_lock(&desc->bd_lock); + desc->bd_md_count -= total_md - posted_md; + spin_unlock(&desc->bd_lock); + LASSERT(desc->bd_md_count >= 0); + mdunlink_iterate_helper(desc->bd_mds, desc->bd_md_max_brw); + req->rq_status = -ENOMEM; + RETURN(-ENOMEM); + } + + /* Set rq_xid to matchbits of the final bulk so that server can + * infer the number of bulks that were prepared */ + req->rq_xid = --xid; + LASSERTF(desc->bd_last_xid == (req->rq_xid & PTLRPC_BULK_OPS_MASK), + "bd_last_xid = x"LPU64", rq_xid = x"LPU64"\n", + desc->bd_last_xid, req->rq_xid); + + spin_lock(&desc->bd_lock); + /* Holler if peer manages to touch buffers before he knows the xid */ + if (desc->bd_md_count != total_md) + CWARN("%s: Peer %s touched %d buffers while I registered\n", + desc->bd_export->exp_obd->obd_name, libcfs_id2str(peer), + total_md - desc->bd_md_count); + spin_unlock(&desc->bd_lock); + + CDEBUG(D_NET, "Setup %u bulk %s buffers: %u pages %u bytes, " + "xid x"LPX64"-"LPX64", portal %u\n", desc->bd_md_count, + desc->bd_type == BULK_GET_SOURCE ? "get-source" : "put-sink", + desc->bd_iov_count, desc->bd_nob, + desc->bd_last_xid, req->rq_xid, desc->bd_portal); + + RETURN(0); +} +EXPORT_SYMBOL(ptlrpc_register_bulk); + +/** + * Disconnect a bulk desc from the network. Idempotent. Not + * thread-safe (i.e. only interlocks with completion callback). + * Returns 1 on success or 0 if network unregistration failed for whatever + * reason. + */ +int ptlrpc_unregister_bulk(struct ptlrpc_request *req, int async) +{ + struct ptlrpc_bulk_desc *desc = req->rq_bulk; + wait_queue_head_t *wq; + struct l_wait_info lwi; + int rc; + ENTRY; + + LASSERT(!in_interrupt()); /* might sleep */ + + /* Let's setup deadline for reply unlink. */ + if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_BULK_UNLINK) && + async && req->rq_bulk_deadline == 0) + req->rq_bulk_deadline = cfs_time_current_sec() + LONG_UNLINK; + + if (ptlrpc_client_bulk_active(req) == 0) /* completed or */ + RETURN(1); /* never registered */ + + LASSERT(desc->bd_req == req); /* bd_req NULL until registered */ + + /* the unlink ensures the callback happens ASAP and is the last + * one. If it fails, it must be because completion just happened, + * but we must still l_wait_event() in this case to give liblustre + * a chance to run client_bulk_callback() */ + mdunlink_iterate_helper(desc->bd_mds, desc->bd_md_max_brw); + + if (ptlrpc_client_bulk_active(req) == 0) /* completed or */ + RETURN(1); /* never registered */ + + /* Move to "Unregistering" phase as bulk was not unlinked yet. */ + ptlrpc_rqphase_move(req, RQ_PHASE_UNREGISTERING); + + /* Do not wait for unlink to finish. */ + if (async) + RETURN(0); + + if (req->rq_set != NULL) + wq = &req->rq_set->set_waitq; + else + wq = &req->rq_reply_waitq; + + for (;;) { + /* Network access will complete in finite time but the HUGE + * timeout lets us CWARN for visibility of sluggish NALs */ + lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(LONG_UNLINK), + cfs_time_seconds(1), NULL, NULL); + rc = l_wait_event(*wq, !ptlrpc_client_bulk_active(req), &lwi); + if (rc == 0) { + ptlrpc_rqphase_move(req, req->rq_next_phase); + RETURN(1); + } + + LASSERT(rc == -ETIMEDOUT); + DEBUG_REQ(D_WARNING, req, "Unexpectedly long timeout: desc %p", + desc); + } + RETURN(0); +} +EXPORT_SYMBOL(ptlrpc_unregister_bulk); + +static void ptlrpc_at_set_reply(struct ptlrpc_request *req, int flags) +{ + struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt; + struct ptlrpc_service *svc = svcpt->scp_service; + int service_time = max_t(int, cfs_time_current_sec() - + req->rq_arrival_time.tv_sec, 1); + + if (!(flags & PTLRPC_REPLY_EARLY) && + (req->rq_type != PTL_RPC_MSG_ERR) && + (req->rq_reqmsg != NULL) && + !(lustre_msg_get_flags(req->rq_reqmsg) & + (MSG_RESENT | MSG_REPLAY | + MSG_REQ_REPLAY_DONE | MSG_LOCK_REPLAY_DONE))) { + /* early replies, errors and recovery requests don't count + * toward our service time estimate */ + int oldse = at_measured(&svcpt->scp_at_estimate, service_time); + + if (oldse != 0) { + DEBUG_REQ(D_ADAPTTO, req, + "svc %s changed estimate from %d to %d", + svc->srv_name, oldse, + at_get(&svcpt->scp_at_estimate)); + } + } + /* Report actual service time for client latency calc */ + lustre_msg_set_service_time(req->rq_repmsg, service_time); + /* Report service time estimate for future client reqs, but report 0 + * (to be ignored by client) if it's a error reply during recovery. + * (bz15815) */ + if (req->rq_type == PTL_RPC_MSG_ERR && + (req->rq_export == NULL || req->rq_export->exp_obd->obd_recovering)) + lustre_msg_set_timeout(req->rq_repmsg, 0); + else + lustre_msg_set_timeout(req->rq_repmsg, + at_get(&svcpt->scp_at_estimate)); + + if (req->rq_reqmsg && + !(lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT)) { + CDEBUG(D_ADAPTTO, "No early reply support: flags=%#x " + "req_flags=%#x magic=%d:%x/%x len=%d\n", + flags, lustre_msg_get_flags(req->rq_reqmsg), + lustre_msg_is_v1(req->rq_reqmsg), + lustre_msg_get_magic(req->rq_reqmsg), + lustre_msg_get_magic(req->rq_repmsg), req->rq_replen); + } +} + +/** + * Send request reply from request \a req reply buffer. + * \a flags defines reply types + * Returns 0 on sucess or error code + */ +int ptlrpc_send_reply(struct ptlrpc_request *req, int flags) +{ + struct ptlrpc_reply_state *rs = req->rq_reply_state; + struct ptlrpc_connection *conn; + int rc; + + /* We must already have a reply buffer (only ptlrpc_error() may be + * called without one). The reply generated by sptlrpc layer (e.g. + * error notify, etc.) might have NULL rq->reqmsg; Otherwise we must + * have a request buffer which is either the actual (swabbed) incoming + * request, or a saved copy if this is a req saved in + * target_queue_final_reply(). + */ + LASSERT (req->rq_no_reply == 0); + LASSERT (req->rq_reqbuf != NULL); + LASSERT (rs != NULL); + LASSERT ((flags & PTLRPC_REPLY_MAYBE_DIFFICULT) || !rs->rs_difficult); + LASSERT (req->rq_repmsg != NULL); + LASSERT (req->rq_repmsg == rs->rs_msg); + LASSERT (rs->rs_cb_id.cbid_fn == reply_out_callback); + LASSERT (rs->rs_cb_id.cbid_arg == rs); + + /* There may be no rq_export during failover */ + + if (unlikely(req->rq_export && req->rq_export->exp_obd && + req->rq_export->exp_obd->obd_fail)) { + /* Failed obd's only send ENODEV */ + req->rq_type = PTL_RPC_MSG_ERR; + req->rq_status = -ENODEV; + CDEBUG(D_HA, "sending ENODEV from failed obd %d\n", + req->rq_export->exp_obd->obd_minor); + } + + /* In order to keep interoprability with the client (< 2.3) which + * doesn't have pb_jobid in ptlrpc_body, We have to shrink the + * ptlrpc_body in reply buffer to ptlrpc_body_v2, otherwise, the + * reply buffer on client will be overflow. + * + * XXX Remove this whenver we drop the interoprability with such client. + */ + req->rq_replen = lustre_shrink_msg(req->rq_repmsg, 0, + sizeof(struct ptlrpc_body_v2), 1); + + if (req->rq_type != PTL_RPC_MSG_ERR) + req->rq_type = PTL_RPC_MSG_REPLY; + + lustre_msg_set_type(req->rq_repmsg, req->rq_type); + lustre_msg_set_status(req->rq_repmsg, req->rq_status); + lustre_msg_set_opc(req->rq_repmsg, + req->rq_reqmsg ? lustre_msg_get_opc(req->rq_reqmsg) : 0); + + target_pack_pool_reply(req); + + ptlrpc_at_set_reply(req, flags); + + if (req->rq_export == NULL || req->rq_export->exp_connection == NULL) + conn = ptlrpc_connection_get(req->rq_peer, req->rq_self, NULL); + else + conn = ptlrpc_connection_addref(req->rq_export->exp_connection); + + if (unlikely(conn == NULL)) { + CERROR("not replying on NULL connection\n"); /* bug 9635 */ + return -ENOTCONN; + } + ptlrpc_rs_addref(rs); /* +1 ref for the network */ + + rc = sptlrpc_svc_wrap_reply(req); + if (unlikely(rc)) + goto out; + + req->rq_sent = cfs_time_current_sec(); + + rc = ptl_send_buf (&rs->rs_md_h, rs->rs_repbuf, rs->rs_repdata_len, + (rs->rs_difficult && !rs->rs_no_ack) ? + LNET_ACK_REQ : LNET_NOACK_REQ, + &rs->rs_cb_id, conn, + ptlrpc_req2svc(req)->srv_rep_portal, + req->rq_xid, req->rq_reply_off); +out: + if (unlikely(rc != 0)) + ptlrpc_req_drop_rs(req); + ptlrpc_connection_put(conn); + return rc; +} +EXPORT_SYMBOL(ptlrpc_send_reply); + +int ptlrpc_reply (struct ptlrpc_request *req) +{ + if (req->rq_no_reply) + return 0; + else + return (ptlrpc_send_reply(req, 0)); +} +EXPORT_SYMBOL(ptlrpc_reply); + +/** + * For request \a req send an error reply back. Create empty + * reply buffers if necessary. + */ +int ptlrpc_send_error(struct ptlrpc_request *req, int may_be_difficult) +{ + int rc; + ENTRY; + + if (req->rq_no_reply) + RETURN(0); + + if (!req->rq_repmsg) { + rc = lustre_pack_reply(req, 1, NULL, NULL); + if (rc) + RETURN(rc); + } + + if (req->rq_status != -ENOSPC && req->rq_status != -EACCES && + req->rq_status != -EPERM && req->rq_status != -ENOENT && + req->rq_status != -EINPROGRESS && req->rq_status != -EDQUOT) + req->rq_type = PTL_RPC_MSG_ERR; + + rc = ptlrpc_send_reply(req, may_be_difficult); + RETURN(rc); +} +EXPORT_SYMBOL(ptlrpc_send_error); + +int ptlrpc_error(struct ptlrpc_request *req) +{ + return ptlrpc_send_error(req, 0); +} +EXPORT_SYMBOL(ptlrpc_error); + +/** + * Send request \a request. + * if \a noreply is set, don't expect any reply back and don't set up + * reply buffers. + * Returns 0 on success or error code. + */ +int ptl_send_rpc(struct ptlrpc_request *request, int noreply) +{ + int rc; + int rc2; + int mpflag = 0; + struct ptlrpc_connection *connection; + lnet_handle_me_t reply_me_h; + lnet_md_t reply_md; + struct obd_device *obd = request->rq_import->imp_obd; + ENTRY; + + if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_DROP_RPC)) + RETURN(0); + + LASSERT(request->rq_type == PTL_RPC_MSG_REQUEST); + LASSERT(request->rq_wait_ctx == 0); + + /* If this is a re-transmit, we're required to have disengaged + * cleanly from the previous attempt */ + LASSERT(!request->rq_receiving_reply); + + if (request->rq_import->imp_obd && + request->rq_import->imp_obd->obd_fail) { + CDEBUG(D_HA, "muting rpc for failed imp obd %s\n", + request->rq_import->imp_obd->obd_name); + /* this prevents us from waiting in ptlrpc_queue_wait */ + request->rq_err = 1; + request->rq_status = -ENODEV; + RETURN(-ENODEV); + } + + connection = request->rq_import->imp_connection; + + lustre_msg_set_handle(request->rq_reqmsg, + &request->rq_import->imp_remote_handle); + lustre_msg_set_type(request->rq_reqmsg, PTL_RPC_MSG_REQUEST); + lustre_msg_set_conn_cnt(request->rq_reqmsg, + request->rq_import->imp_conn_cnt); + lustre_msghdr_set_flags(request->rq_reqmsg, + request->rq_import->imp_msghdr_flags); + + if (request->rq_resend) + lustre_msg_add_flags(request->rq_reqmsg, MSG_RESENT); + + if (request->rq_memalloc) + mpflag = cfs_memory_pressure_get_and_set(); + + rc = sptlrpc_cli_wrap_request(request); + if (rc) + GOTO(out, rc); + + /* bulk register should be done after wrap_request() */ + if (request->rq_bulk != NULL) { + rc = ptlrpc_register_bulk (request); + if (rc != 0) + GOTO(out, rc); + } + + if (!noreply) { + LASSERT (request->rq_replen != 0); + if (request->rq_repbuf == NULL) { + LASSERT(request->rq_repdata == NULL); + LASSERT(request->rq_repmsg == NULL); + rc = sptlrpc_cli_alloc_repbuf(request, + request->rq_replen); + if (rc) { + /* this prevents us from looping in + * ptlrpc_queue_wait */ + request->rq_err = 1; + request->rq_status = rc; + GOTO(cleanup_bulk, rc); + } + } else { + request->rq_repdata = NULL; + request->rq_repmsg = NULL; + } + + rc = LNetMEAttach(request->rq_reply_portal,/*XXX FIXME bug 249*/ + connection->c_peer, request->rq_xid, 0, + LNET_UNLINK, LNET_INS_AFTER, &reply_me_h); + if (rc != 0) { + CERROR("LNetMEAttach failed: %d\n", rc); + LASSERT (rc == -ENOMEM); + GOTO(cleanup_bulk, rc = -ENOMEM); + } + } + + spin_lock(&request->rq_lock); + /* If the MD attach succeeds, there _will_ be a reply_in callback */ + request->rq_receiving_reply = !noreply; + /* We are responsible for unlinking the reply buffer */ + request->rq_must_unlink = !noreply; + /* Clear any flags that may be present from previous sends. */ + request->rq_replied = 0; + request->rq_err = 0; + request->rq_timedout = 0; + request->rq_net_err = 0; + request->rq_resend = 0; + request->rq_restart = 0; + request->rq_reply_truncate = 0; + spin_unlock(&request->rq_lock); + + if (!noreply) { + reply_md.start = request->rq_repbuf; + reply_md.length = request->rq_repbuf_len; + /* Allow multiple early replies */ + reply_md.threshold = LNET_MD_THRESH_INF; + /* Manage remote for early replies */ + reply_md.options = PTLRPC_MD_OPTIONS | LNET_MD_OP_PUT | + LNET_MD_MANAGE_REMOTE | + LNET_MD_TRUNCATE; /* allow to make EOVERFLOW error */; + reply_md.user_ptr = &request->rq_reply_cbid; + reply_md.eq_handle = ptlrpc_eq_h; + + /* We must see the unlink callback to unset rq_must_unlink, + so we can't auto-unlink */ + rc = LNetMDAttach(reply_me_h, reply_md, LNET_RETAIN, + &request->rq_reply_md_h); + if (rc != 0) { + CERROR("LNetMDAttach failed: %d\n", rc); + LASSERT (rc == -ENOMEM); + spin_lock(&request->rq_lock); + /* ...but the MD attach didn't succeed... */ + request->rq_receiving_reply = 0; + spin_unlock(&request->rq_lock); + GOTO(cleanup_me, rc = -ENOMEM); + } + + CDEBUG(D_NET, "Setup reply buffer: %u bytes, xid "LPU64 + ", portal %u\n", + request->rq_repbuf_len, request->rq_xid, + request->rq_reply_portal); + } + + /* add references on request for request_out_callback */ + ptlrpc_request_addref(request); + if (obd->obd_svc_stats != NULL) + lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQACTIVE_CNTR, + atomic_read(&request->rq_import->imp_inflight)); + + OBD_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_DELAY_SEND, request->rq_timeout + 5); + + do_gettimeofday(&request->rq_arrival_time); + request->rq_sent = cfs_time_current_sec(); + /* We give the server rq_timeout secs to process the req, and + add the network latency for our local timeout. */ + request->rq_deadline = request->rq_sent + request->rq_timeout + + ptlrpc_at_get_net_latency(request); + + ptlrpc_pinger_sending_on_import(request->rq_import); + + DEBUG_REQ(D_INFO, request, "send flg=%x", + lustre_msg_get_flags(request->rq_reqmsg)); + rc = ptl_send_buf(&request->rq_req_md_h, + request->rq_reqbuf, request->rq_reqdata_len, + LNET_NOACK_REQ, &request->rq_req_cbid, + connection, + request->rq_request_portal, + request->rq_xid, 0); + if (rc == 0) + GOTO(out, rc); + + ptlrpc_req_finished(request); + if (noreply) + GOTO(out, rc); + + cleanup_me: + /* MEUnlink is safe; the PUT didn't even get off the ground, and + * nobody apart from the PUT's target has the right nid+XID to + * access the reply buffer. */ + rc2 = LNetMEUnlink(reply_me_h); + LASSERT (rc2 == 0); + /* UNLINKED callback called synchronously */ + LASSERT(!request->rq_receiving_reply); + + cleanup_bulk: + /* We do sync unlink here as there was no real transfer here so + * the chance to have long unlink to sluggish net is smaller here. */ + ptlrpc_unregister_bulk(request, 0); + out: + if (request->rq_memalloc) + cfs_memory_pressure_restore(mpflag); + return rc; +} +EXPORT_SYMBOL(ptl_send_rpc); + +/** + * Register request buffer descriptor for request receiving. + */ +int ptlrpc_register_rqbd(struct ptlrpc_request_buffer_desc *rqbd) +{ + struct ptlrpc_service *service = rqbd->rqbd_svcpt->scp_service; + static lnet_process_id_t match_id = {LNET_NID_ANY, LNET_PID_ANY}; + int rc; + lnet_md_t md; + lnet_handle_me_t me_h; + + CDEBUG(D_NET, "LNetMEAttach: portal %d\n", + service->srv_req_portal); + + if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_RQBD)) + return (-ENOMEM); + + /* NB: CPT affinity service should use new LNet flag LNET_INS_LOCAL, + * which means buffer can only be attached on local CPT, and LND + * threads can find it by grabbing a local lock */ + rc = LNetMEAttach(service->srv_req_portal, + match_id, 0, ~0, LNET_UNLINK, + rqbd->rqbd_svcpt->scp_cpt >= 0 ? + LNET_INS_LOCAL : LNET_INS_AFTER, &me_h); + if (rc != 0) { + CERROR("LNetMEAttach failed: %d\n", rc); + return (-ENOMEM); + } + + LASSERT(rqbd->rqbd_refcount == 0); + rqbd->rqbd_refcount = 1; + + md.start = rqbd->rqbd_buffer; + md.length = service->srv_buf_size; + md.max_size = service->srv_max_req_size; + md.threshold = LNET_MD_THRESH_INF; + md.options = PTLRPC_MD_OPTIONS | LNET_MD_OP_PUT | LNET_MD_MAX_SIZE; + md.user_ptr = &rqbd->rqbd_cbid; + md.eq_handle = ptlrpc_eq_h; + + rc = LNetMDAttach(me_h, md, LNET_UNLINK, &rqbd->rqbd_md_h); + if (rc == 0) + return (0); + + CERROR("LNetMDAttach failed: %d; \n", rc); + LASSERT (rc == -ENOMEM); + rc = LNetMEUnlink (me_h); + LASSERT (rc == 0); + rqbd->rqbd_refcount = 0; + + return (-ENOMEM); +} |