/* * 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 #ifndef __KERNEL__ #include #endif #include #include #include #include #include #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); } #ifdef HAVE_SERVER_SUPPORT /** * Prepare bulk descriptor for specified incoming request \a req that * can fit \a npages * pages. \a type is bulk type. \a portal is where * the bulk to be sent. Used on server-side after request was already * received. * Returns pointer to newly allocatrd initialized bulk descriptor or NULL on * error. */ struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_exp(struct ptlrpc_request *req, int npages, int type, int portal) { struct obd_export *exp = req->rq_export; struct ptlrpc_bulk_desc *desc; ENTRY; LASSERT(type == BULK_PUT_SOURCE || type == BULK_GET_SINK); desc = new_bulk(npages, type, portal); if (desc == NULL) RETURN(NULL); desc->bd_export = class_export_get(exp); desc->bd_req = req; desc->bd_cbid.cbid_fn = server_bulk_callback; desc->bd_cbid.cbid_arg = desc; /* NB we don't assign rq_bulk here; server-side requests are * re-used, and the handler frees the bulk desc explicitly. */ return desc; } EXPORT_SYMBOL(ptlrpc_prep_bulk_exp); /** * Starts bulk transfer for descriptor \a desc * Returns 0 on success or error code. */ int ptlrpc_start_bulk_transfer(struct ptlrpc_bulk_desc *desc) { struct ptlrpc_connection *conn = desc->bd_export->exp_connection; int rc; int rc2; lnet_md_t md; __u64 xid; ENTRY; if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_BULK_PUT_NET)) RETURN(0); /* NB no locking required until desc is on the network */ LASSERT (!desc->bd_network_rw); LASSERT (desc->bd_type == BULK_PUT_SOURCE || desc->bd_type == BULK_GET_SINK); desc->bd_success = 0; md.user_ptr = &desc->bd_cbid; md.eq_handle = ptlrpc_eq_h; md.threshold = 2; /* SENT and ACK/REPLY */ md.options = PTLRPC_MD_OPTIONS; ptlrpc_fill_bulk_md(&md, desc); LASSERT (desc->bd_cbid.cbid_fn == server_bulk_callback); LASSERT (desc->bd_cbid.cbid_arg == desc); /* NB total length may be 0 for a read past EOF, so we send a 0 * length bulk, since the client expects a bulk event. */ rc = LNetMDBind(md, LNET_UNLINK, &desc->bd_md_h); if (rc != 0) { CERROR("LNetMDBind failed: %d\n", rc); LASSERT (rc == -ENOMEM); RETURN(-ENOMEM); } /* Client's bulk and reply matchbits are the same */ xid = desc->bd_req->rq_xid; CDEBUG(D_NET, "Transferring %u pages %u bytes via portal %d " "id %s xid "LPX64"\n", desc->bd_iov_count, desc->bd_nob, desc->bd_portal, libcfs_id2str(conn->c_peer), xid); /* Network is about to get at the memory */ desc->bd_network_rw = 1; if (desc->bd_type == BULK_PUT_SOURCE) rc = LNetPut (conn->c_self, desc->bd_md_h, LNET_ACK_REQ, conn->c_peer, desc->bd_portal, xid, 0, 0); else rc = LNetGet (conn->c_self, desc->bd_md_h, conn->c_peer, desc->bd_portal, xid, 0); if (rc != 0) { /* Can't send, so we unlink the MD bound above. The UNLINK * event this creates will signal completion with failure, * so we return SUCCESS here! */ CERROR("Transfer(%s, %d, "LPX64") failed: %d\n", libcfs_id2str(conn->c_peer), desc->bd_portal, xid, rc); rc2 = LNetMDUnlink(desc->bd_md_h); LASSERT (rc2 == 0); } RETURN(0); } EXPORT_SYMBOL(ptlrpc_start_bulk_transfer); /** * Server side bulk abort. Idempotent. Not thread-safe (i.e. only * serialises with completion callback) */ void ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *desc) { struct l_wait_info lwi; int rc; LASSERT(!cfs_in_interrupt()); /* might sleep */ if (!ptlrpc_server_bulk_active(desc)) /* completed or */ return; /* never started */ /* We used to poison the pages with 0xab here because we did not want to * send any meaningful data over the wire for evicted clients (bug 9297) * However, this is no longer safe now that we use the page cache on the * OSS (bug 20560) */ /* 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 server_bulk_callback()*/ LNetMDUnlink(desc->bd_md_h); 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(desc->bd_waitq, !ptlrpc_server_bulk_active(desc), &lwi); if (rc == 0) return; LASSERT(rc == -ETIMEDOUT); CWARN("Unexpectedly long timeout: desc %p\n", desc); } } EXPORT_SYMBOL(ptlrpc_abort_bulk); #endif /* HAVE_SERVER_SUPPORT */ /** * Register bulk 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; int rc2; 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_network_rw); 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); desc->bd_success = 0; peer = desc->bd_import->imp_connection->c_peer; md.user_ptr = &desc->bd_cbid; md.eq_handle = ptlrpc_eq_h; md.threshold = 1; /* PUT or GET */ 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); LASSERT (desc->bd_cbid.cbid_fn == client_bulk_callback); LASSERT (desc->bd_cbid.cbid_arg == desc); /* XXX Registering the same xid on retried bulk makes my head * explode trying to understand how the original request's bulk * might interfere with the retried request -eeb * On the other hand replaying with the same xid is fine, since * we are guaranteed old request have completed. -green */ LASSERTF(!(desc->bd_registered && req->rq_send_state != LUSTRE_IMP_REPLAY) || req->rq_xid != desc->bd_last_xid, "registered: %d rq_xid: "LPU64" bd_last_xid: "LPU64"\n", desc->bd_registered, req->rq_xid, desc->bd_last_xid); desc->bd_registered = 1; desc->bd_last_xid = req->rq_xid; rc = LNetMEAttach(desc->bd_portal, peer, req->rq_xid, 0, LNET_UNLINK, LNET_INS_AFTER, &me_h); if (rc != 0) { CERROR("LNetMEAttach failed: %d\n", rc); LASSERT (rc == -ENOMEM); RETURN (-ENOMEM); } /* About to let the network at it... */ desc->bd_network_rw = 1; rc = LNetMDAttach(me_h, md, LNET_UNLINK, &desc->bd_md_h); if (rc != 0) { CERROR("LNetMDAttach failed: %d\n", rc); LASSERT (rc == -ENOMEM); desc->bd_network_rw = 0; rc2 = LNetMEUnlink (me_h); LASSERT (rc2 == 0); RETURN (-ENOMEM); } CDEBUG(D_NET, "Setup bulk %s buffers: %u pages %u bytes, xid "LPU64", " "portal %u\n", desc->bd_type == BULK_GET_SOURCE ? "get-source" : "put-sink", desc->bd_iov_count, desc->bd_nob, 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; cfs_waitq_t *wq; struct l_wait_info lwi; int rc; ENTRY; LASSERT(!cfs_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)) /* 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() */ LNetMDUnlink(desc->bd_md_h); if (!ptlrpc_client_bulk_active(req)) /* 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, cfs_atomic_read(&request->rq_import->imp_inflight)); OBD_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_DELAY_SEND, request->rq_timeout + 5); cfs_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); }