X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fptlrpc%2Fniobuf.c;h=999869000c35b2861e6051fc500161ad0a715b09;hp=cdc9b59fae3f2d6f2f0c7189e142fc0f721944cc;hb=e6490ea6cf0b793c0b47f17ac5a5fa3a2a136e0d;hpb=ee8c12f206b4926e7252f8a85383cc0f3ccea68c;ds=sidebyside diff --git a/lustre/ptlrpc/niobuf.c b/lustre/ptlrpc/niobuf.c index cdc9b59..9998690 100644 --- a/lustre/ptlrpc/niobuf.c +++ b/lustre/ptlrpc/niobuf.c @@ -1,535 +1,969 @@ -/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- - * vim:expandtab:shiftwidth=8:tabstop=8: +/* + * GPL HEADER START * - * Copyright (c) 2002, 2003 Cluster File Systems, Inc. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * - * This file is part of Lustre, http://www.lustre.org. + * 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. * - * Lustre is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License 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). * - * Lustre 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 for more details. + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.gnu.org/licenses/gpl-2.0.html * - * You should have received a copy of the GNU General Public License - * along with Lustre; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * GPL HEADER END + */ +/* + * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. * + * Copyright (c) 2012, 2016, 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 +#include +#include +#include +#include +#include #include "ptlrpc_internal.h" -static int ptl_send_buf (ptl_handle_md_t *mdh, void *base, int len, - ptl_ack_req_t ack, struct ptlrpc_cb_id *cbid, - struct ptlrpc_connection *conn, int portal, __u64 xid) +/** + * 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(struct lnet_handle_md *mdh, void *base, int len, + enum lnet_ack_req ack, struct ptlrpc_cb_id *cbid, + lnet_nid_t self, struct lnet_process_id peer_id, + int portal, __u64 xid, unsigned int offset, + struct lnet_handle_md *bulk_cookie) { - int rc; - ptl_md_t md; - char str[PTL_NALFMT_SIZE]; - ENTRY; - - LASSERT (portal != 0); - LASSERT (conn != NULL); - CDEBUG (D_INFO, "conn=%p ni %s id %s on %s\n", - conn, conn->c_peer.peer_ni->pni_name, - ptlrpc_id2str(&conn->c_peer, str), - conn->c_peer.peer_ni->pni_name); - md.start = base; - md.length = len; - md.threshold = (ack == PTL_ACK_REQ) ? 2 : 1; - md.options = PTLRPC_MD_OPTIONS; - md.user_ptr = cbid; - md.eq_handle = conn->c_peer.peer_ni->pni_eq_h; - - if (ack == PTL_ACK_REQ && - OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_ACK | OBD_FAIL_ONCE)) { - /* don't ask for the ack to simulate failing client */ - ack = PTL_NOACK_REQ; - obd_fail_loc |= OBD_FAIL_ONCE | OBD_FAILED; - } - - rc = PtlMDBind (conn->c_peer.peer_ni->pni_ni_h, md, - PTL_UNLINK, mdh); - if (rc != PTL_OK) { - CERROR ("PtlMDBind failed: %d\n", rc); - LASSERT (rc == PTL_NO_SPACE); - RETURN (-ENOMEM); - } + int rc; + struct lnet_md md; + ENTRY; + + LASSERT (portal != 0); + CDEBUG (D_INFO, "peer_id %s\n", libcfs_id2str(peer_id)); + 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; + LNetInvalidateMDHandle(&md.bulk_handle); + + if (bulk_cookie) { + md.bulk_handle = *bulk_cookie; + md.options |= LNET_MD_BULK_HANDLE; + } + + 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 %lld, offset %u\n", + len, portal, xid, offset); + + rc = LNetPut(self, *mdh, ack, + peer_id, 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, %lld) failed: %d\n", + libcfs_id2str(peer_id), portal, xid, rc); + rc2 = LNetMDUnlink(*mdh); + LASSERTF(rc2 == 0, "rc2 = %d\n", rc2); + } + + RETURN (0); +} - CDEBUG(D_NET, "Sending %d bytes to portal %d, xid "LPD64"\n", - len, portal, xid); - - rc = PtlPut (*mdh, ack, conn->c_peer.peer_id, portal, 0, xid, 0, 0); - if (rc != PTL_OK) { - 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("PtlPut(%s, %d, "LPD64") failed: %d\n", - ptlrpc_id2str(&conn->c_peer, str), - portal, xid, rc); - rc2 = PtlMDUnlink(*mdh); - LASSERTF(rc2 == PTL_OK, "rc2 = %d\n", rc2); - } +static void mdunlink_iterate_helper(struct lnet_handle_md *bd_mds, int count) +{ + int i; - RETURN (0); + for (i = 0; i < count; i++) + LNetMDUnlink(bd_mds[i]); } -int ptlrpc_start_bulk_transfer (struct ptlrpc_bulk_desc *desc) +#ifdef HAVE_SERVER_SUPPORT +/** + * Prepare bulk descriptor for specified incoming request \a req that + * can fit \a nfrags * 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, + unsigned nfrags, unsigned max_brw, + unsigned int type, + unsigned portal, + const struct ptlrpc_bulk_frag_ops + *ops) { - int rc; - int rc2; - struct ptlrpc_peer *peer; - ptl_md_t md; - __u64 xid; - char str[PTL_NALFMT_SIZE]; - ENTRY; + struct obd_export *exp = req->rq_export; + struct ptlrpc_bulk_desc *desc; - if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_PTLRPC_BULK_PUT_NET)) - RETURN(0); + ENTRY; + LASSERT(ptlrpc_is_bulk_op_active(type)); - /* 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; - peer = &desc->bd_export->exp_connection->c_peer; - - md.user_ptr = &desc->bd_cbid; - md.eq_handle = peer->peer_ni->pni_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 = PtlMDBind(peer->peer_ni->pni_ni_h, md, - PTL_UNLINK, &desc->bd_md_h); - if (rc != PTL_OK) { - CERROR("PtlMDBind failed: %d\n", rc); - LASSERT (rc == PTL_NO_SPACE); - RETURN(-ENOMEM); - } + desc = ptlrpc_new_bulk(nfrags, max_brw, type, portal, ops); + if (desc == NULL) + RETURN(NULL); - /* 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 on %s " - "nid %s pid %d xid "LPX64"\n", desc->bd_iov_count, - desc->bd_nob, desc->bd_portal, peer->peer_ni->pni_name, - ptlrpc_id2str(peer, str), peer->peer_id.pid, xid); + desc->bd_export = class_export_get(exp); + desc->bd_req = req; - /* Network is about to get at the memory */ - desc->bd_network_rw = 1; + desc->bd_cbid.cbid_fn = server_bulk_callback; + desc->bd_cbid.cbid_arg = desc; - if (desc->bd_type == BULK_PUT_SOURCE) - rc = PtlPut (desc->bd_md_h, PTL_ACK_REQ, peer->peer_id, - desc->bd_portal, 0, xid, 0, 0); - else - rc = PtlGet (desc->bd_md_h, peer->peer_id, - desc->bd_portal, 0, xid, 0); - - if (rc != PTL_OK) { - /* 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", - ptlrpc_id2str(peer, str), - desc->bd_portal, xid, rc); - rc2 = PtlMDUnlink(desc->bd_md_h); - LASSERT (rc2 == PTL_OK); - } + /* NB we don't assign rq_bulk here; server-side requests are + * re-used, and the handler frees the bulk desc explicitly. */ - RETURN(0); + return desc; } +EXPORT_SYMBOL(ptlrpc_prep_bulk_exp); -void ptlrpc_abort_bulk (struct ptlrpc_bulk_desc *desc) +/** + * Starts bulk transfer for descriptor \a desc on the server. + * Returns 0 on success or error code. + */ +int ptlrpc_start_bulk_transfer(struct ptlrpc_bulk_desc *desc) { - /* Server side bulk abort. Idempotent. Not thread-safe (i.e. only - * serialises with completion callback) */ - struct l_wait_info lwi; - int rc; - - LASSERT (!in_interrupt ()); /* might sleep */ - - if (!ptlrpc_bulk_active(desc)) /* completed or */ - return; /* never started */ - - /* 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()*/ + struct obd_export *exp = desc->bd_export; + lnet_nid_t self_nid; + struct lnet_process_id peer_id; + int rc = 0; + __u64 mbits; + int posted_md; + int total_md; + struct lnet_md md; + 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_md_count == 0); + LASSERT(ptlrpc_is_bulk_op_active(desc->bd_type)); + + LASSERT(desc->bd_cbid.cbid_fn == server_bulk_callback); + LASSERT(desc->bd_cbid.cbid_arg == desc); + + /* + * Multi-Rail: get the preferred self and peer NIDs from the + * request, so they are based on the route taken by the + * message. + */ + self_nid = desc->bd_req->rq_self; + peer_id = desc->bd_req->rq_source; + + /* NB total length may be 0 for a read past EOF, so we send 0 + * length bulks, since the client expects bulk events. + * + * The client may not need all of the bulk mbits for the RPC. The RPC + * used the mbits of the highest bulk mbits needed, and the server masks + * off high bits to get bulk count for this RPC. LU-1431 */ + mbits = desc->bd_req->rq_mbits & ~((__u64)desc->bd_md_max_brw - 1); + total_md = desc->bd_req->rq_mbits - mbits + 1; + + desc->bd_md_count = total_md; + desc->bd_failure = 0; + + md.user_ptr = &desc->bd_cbid; + md.eq_handle = ptlrpc_eq_h; + md.threshold = 2; /* SENT and ACK/REPLY */ + + for (posted_md = 0; posted_md < total_md; mbits++) { + md.options = PTLRPC_MD_OPTIONS; + + /* NB it's assumed that source and sink buffer frags are + * page-aligned. Otherwise we'd have to send client bulk + * sizes over and split server buffer accordingly */ + ptlrpc_fill_bulk_md(&md, desc, posted_md); + rc = LNetMDBind(md, LNET_UNLINK, &desc->bd_mds[posted_md]); + if (rc != 0) { + CERROR("%s: LNetMDBind failed for MD %u: rc = %d\n", + exp->exp_obd->obd_name, posted_md, rc); + LASSERT(rc == -ENOMEM); + if (posted_md == 0) { + desc->bd_md_count = 0; + RETURN(-ENOMEM); + } + break; + } + + /* LU-6441: last md is not sent and desc->bd_md_count == 1 */ + if (OBD_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB3, + CFS_FAIL_ONCE) && + total_md > 1 && posted_md == total_md - 1) { + posted_md++; + continue; + } + + /* Network is about to get at the memory */ + if (ptlrpc_is_bulk_put_source(desc->bd_type)) + rc = LNetPut(self_nid, desc->bd_mds[posted_md], + LNET_ACK_REQ, peer_id, + desc->bd_portal, mbits, 0, 0); + else + rc = LNetGet(self_nid, desc->bd_mds[posted_md], + peer_id, desc->bd_portal, mbits, 0); + + posted_md++; + if (rc != 0) { + CERROR("%s: failed bulk transfer with %s:%u x%llu: " + "rc = %d\n", exp->exp_obd->obd_name, + libcfs_id2str(peer_id), desc->bd_portal, + mbits, rc); + break; + } + } + + 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! */ + 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, posted_md); + RETURN(0); + } + + CDEBUG(D_NET, "Transferring %u pages %u bytes via portal %d " + "id %s mbits %#llx-%#llx\n", desc->bd_iov_count, + desc->bd_nob, desc->bd_portal, libcfs_id2str(peer_id), + mbits - posted_md, mbits - 1); + + RETURN(0); +} - PtlMDUnlink (desc->bd_md_h); +/** + * 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(!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()*/ + mdunlink_iterate_helper(desc->bd_mds, desc->bd_md_max_brw); + + 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); + } +} +#endif /* HAVE_SERVER_SUPPORT */ - for (;;) { - /* Network access will complete in finite time but the HUGE - * timeout lets us CWARN for visibility of sluggish NALs */ - lwi = LWI_TIMEOUT (300 * HZ, NULL, NULL); - rc = l_wait_event(desc->bd_waitq, - !ptlrpc_bulk_active(desc), &lwi); - if (rc == 0) - return; +/** + * 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; + struct lnet_process_id peer; + int rc = 0; + int rc2; + int posted_md; + int total_md; + __u64 mbits; + struct lnet_handle_me me_h; + struct lnet_md md; + ENTRY; + + if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_BULK_GET_NET)) + RETURN(0); - LASSERT(rc == -ETIMEDOUT); - CWARN("Unexpectedly long timeout: desc %p\n", desc); - } + /* 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(ptlrpc_is_bulk_op_passive(desc->bd_type)); + + /* 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 if (desc->bd_nob_transferred != 0) + /* If the network failed after an RPC was sent, this condition + * could happen. Rather than assert (was here before), return + * an EIO error. */ + RETURN(-EIO); + + 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); + + total_md = (desc->bd_iov_count + LNET_MAX_IOV - 1) / LNET_MAX_IOV; + /* rq_mbits is matchbits of the final bulk */ + mbits = req->rq_mbits - total_md + 1; + + LASSERTF(mbits == (req->rq_mbits & PTLRPC_BULK_OPS_MASK), + "first mbits = x%llu, last mbits = x%llu\n", + mbits, req->rq_mbits); + LASSERTF(!(desc->bd_registered && + req->rq_send_state != LUSTRE_IMP_REPLAY) || + mbits != desc->bd_last_mbits, + "registered: %d rq_mbits: %llu bd_last_mbits: %llu\n", + desc->bd_registered, mbits, desc->bd_last_mbits); + + desc->bd_registered = 1; + desc->bd_last_mbits = mbits; + 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++, mbits++) { + md.options = PTLRPC_MD_OPTIONS | + (ptlrpc_is_bulk_op_get(desc->bd_type) ? + LNET_MD_OP_GET : LNET_MD_OP_PUT); + ptlrpc_fill_bulk_md(&md, desc, posted_md); + + rc = LNetMEAttach(desc->bd_portal, peer, mbits, 0, + LNET_UNLINK, LNET_INS_AFTER, &me_h); + if (rc != 0) { + CERROR("%s: LNetMEAttach failed x%llu/%d: rc = %d\n", + desc->bd_import->imp_obd->obd_name, mbits, + 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%llu/%d: rc = %d\n", + desc->bd_import->imp_obd->obd_name, mbits, + 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); + } + + spin_lock(&desc->bd_lock); + /* Holler if peer manages to touch buffers before he knows the mbits */ + if (desc->bd_md_count != total_md) + CWARN("%s: Peer %s touched %d buffers while I registered\n", + desc->bd_import->imp_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, " + "mbits x%#llx-%#llx, portal %u\n", desc->bd_md_count, + ptlrpc_is_bulk_op_get(desc->bd_type) ? "get-source" : "put-sink", + desc->bd_iov_count, desc->bd_nob, + desc->bd_last_mbits, req->rq_mbits, desc->bd_portal); + + RETURN(0); } -int ptlrpc_register_bulk (struct ptlrpc_request *req) +/** + * 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; - struct ptlrpc_peer *peer; - int rc; - int rc2; - ptl_handle_me_t me_h; - ptl_md_t md; - ENTRY; + struct ptlrpc_bulk_desc *desc = req->rq_bulk; + struct l_wait_info lwi; + int rc; + ENTRY; - if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_PTLRPC_BULK_GET_NET)) - RETURN(0); + LASSERT(!in_interrupt()); /* might sleep */ - /* 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 = peer->peer_ni->pni_eq_h; - md.threshold = 1; /* PUT or GET */ - md.options = PTLRPC_MD_OPTIONS | - ((desc->bd_type == BULK_GET_SOURCE) ? - PTL_MD_OP_GET : PTL_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 */ - LASSERT (!desc->bd_registered || req->rq_xid != desc->bd_last_xid); - desc->bd_registered = 1; - desc->bd_last_xid = req->rq_xid; - - rc = PtlMEAttach(peer->peer_ni->pni_ni_h, desc->bd_portal, - desc->bd_import->imp_connection->c_peer.peer_id, - req->rq_xid, 0, PTL_UNLINK, PTL_INS_AFTER, &me_h); - if (rc != PTL_OK) { - CERROR("PtlMEAttach failed: %d\n", rc); - LASSERT (rc == PTL_NO_SPACE); - RETURN (-ENOMEM); - } + /* Let's setup deadline for reply unlink. */ + if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_BULK_UNLINK) && + async && req->rq_bulk_deadline == 0 && cfs_fail_val == 0) + req->rq_bulk_deadline = ktime_get_real_seconds() + LONG_UNLINK; - /* About to let the network at it... */ - desc->bd_network_rw = 1; - rc = PtlMDAttach(me_h, md, PTL_UNLINK, &desc->bd_md_h); - if (rc != PTL_OK) { - CERROR("PtlMDAttach failed: %d\n", rc); - LASSERT (rc == PTL_NO_SPACE); - desc->bd_network_rw = 0; - rc2 = PtlMEUnlink (me_h); - LASSERT (rc2 == PTL_OK); - RETURN (-ENOMEM); - } + if (ptlrpc_client_bulk_active(req) == 0) /* completed or */ + RETURN(1); /* never registered */ - CDEBUG(D_NET, "Setup bulk %s buffers: %u pages %u bytes, xid "LPX64", " - "portal %u on %s\n", - desc->bd_type == BULK_GET_SOURCE ? "get-source" : "put-sink", - desc->bd_iov_count, desc->bd_nob, - req->rq_xid, desc->bd_portal, peer->peer_ni->pni_name); - RETURN(0); -} + LASSERT(desc->bd_req == req); /* bd_req NULL until registered */ -void ptlrpc_unregister_bulk (struct ptlrpc_request *req) -{ - /* Disconnect a bulk desc from the network. Idempotent. Not - * thread-safe (i.e. only interlocks with completion callback). */ - struct ptlrpc_bulk_desc *desc = req->rq_bulk; - wait_queue_head_t *wq; - struct l_wait_info lwi; - int rc; - - LASSERT (!in_interrupt ()); /* might sleep */ - - if (!ptlrpc_bulk_active(desc)) /* completed or */ - return; /* 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() */ - - PtlMDUnlink (desc->bd_md_h); - - if (req->rq_set != NULL) - wq = &req->rq_set->set_waitq; - else - wq = &req->rq_reply_waitq; + /* 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 */ - for (;;) { + /* Move to "Unregistering" phase as bulk was not unlinked yet. */ + ptlrpc_rqphase_move(req, RQ_PHASE_UNREG_BULK); + + /* Do not wait for unlink to finish. */ + if (async) + RETURN(0); + + for (;;) { + /* The wq argument is ignored by user-space wait_event macros */ + wait_queue_head_t *wq = (req->rq_set != NULL) ? + &req->rq_set->set_waitq : + &req->rq_reply_waitq; /* Network access will complete in finite time but the HUGE * timeout lets us CWARN for visibility of sluggish NALs */ - lwi = LWI_TIMEOUT (300 * HZ, NULL, NULL); - rc = l_wait_event(*wq, !ptlrpc_bulk_active(desc), &lwi); - if (rc == 0) - return; - - LASSERT (rc == -ETIMEDOUT); - CWARN("Unexpectedly long timeout: desc %p\n", desc); + 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); } -int ptlrpc_send_reply (struct ptlrpc_request *req, int may_be_difficult) +static void ptlrpc_at_set_reply(struct ptlrpc_request *req, int flags) { - struct ptlrpc_service *svc = req->rq_rqbd->rqbd_srv_ni->sni_service; - struct ptlrpc_reply_state *rs = req->rq_reply_state; - struct ptlrpc_connection *conn; - int rc; + struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt; + struct ptlrpc_service *svc = svcpt->scp_service; + int service_time = max_t(int, ktime_get_real_seconds() - + 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 an error reply during recovery. + * b=15815 + */ + 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 { + time64_t timeout; + + if (req->rq_export && req->rq_reqmsg != NULL && + (flags & PTLRPC_REPLY_EARLY) && + lustre_msg_get_flags(req->rq_reqmsg) & + (MSG_REPLAY | MSG_REQ_REPLAY_DONE | MSG_LOCK_REPLAY_DONE)) { + struct obd_device *exp_obd = req->rq_export->exp_obd; + + timeout = ktime_get_real_seconds() - + req->rq_arrival_time.tv_sec + + min_t(time64_t, at_extra, + exp_obd->obd_recovery_timeout / 4); + } else { + timeout = at_get(&svcpt->scp_at_estimate); + } + lustre_msg_set_timeout(req->rq_repmsg, timeout); + } + + 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=%x/%x len=%d\n", + flags, lustre_msg_get_flags(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 success 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). We usually also 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(). but this - * will not be true since some security handling may skip the reqmsg - * setting and prepare reply under normal ptlrpc layer */ + * 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 (may_be_difficult || !rs->rs_difficult); 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); - LASSERT (req->rq_repmsg != NULL); + /* 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; - req->rq_repmsg->type = req->rq_type; - req->rq_repmsg->status = req->rq_status; - req->rq_repmsg->opc = req->rq_reqmsg ? req->rq_reqmsg->opc : 0; + lustre_msg_set_type(req->rq_repmsg, req->rq_type); + lustre_msg_set_status(req->rq_repmsg, + ptlrpc_status_hton(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); - if (req->rq_export == NULL) - conn = ptlrpc_get_connection(&req->rq_peer, NULL); + 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); - atomic_inc (&svc->srv_outstanding_replies); + 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 = svcsec_authorize(req); - if (rc) { - CDEBUG(D_ERROR, "Error wrap reply message "LPX64"\n", req->rq_xid); + rc = sptlrpc_svc_wrap_reply(req); + if (unlikely(rc)) goto out; - } - rc = ptl_send_buf (&rs->rs_md_h, rs->rs_repbuf, rs->rs_repdata_len, - rs->rs_difficult ? PTL_ACK_REQ : PTL_NOACK_REQ, - &rs->rs_cb_id, conn, - svc->srv_rep_portal, req->rq_xid); + req->rq_sent = ktime_get_real_seconds(); + + 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, req->rq_self, req->rq_source, + ptlrpc_req2svc(req)->srv_rep_portal, + req->rq_xid, req->rq_reply_off, NULL); out: - if (rc != 0) { - atomic_dec (&svc->srv_outstanding_replies); - - if (!rs->rs_difficult) { - /* Callers other than target_send_reply() expect me - * to clean up on a comms error */ - lustre_free_reply_state (rs); - req->rq_reply_state = NULL; - req->rq_repmsg = NULL; - } - } - ptlrpc_put_connection(conn); + if (unlikely(rc != 0)) + ptlrpc_req_drop_rs(req); + ptlrpc_connection_put(conn); return rc; } int ptlrpc_reply (struct ptlrpc_request *req) { - return (ptlrpc_send_reply (req, 0)); + if (req->rq_no_reply) + return 0; + else + return (ptlrpc_send_reply(req, 0)); } -int ptlrpc_error(struct ptlrpc_request *req) +/** + * 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, 0, NULL, NULL); + rc = lustre_pack_reply(req, 1, NULL, NULL); if (rc) RETURN(rc); } - req->rq_type = PTL_RPC_MSG_ERR; + 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, 0); + rc = ptlrpc_send_reply(req, may_be_difficult); RETURN(rc); } -int ptl_send_rpc(struct ptlrpc_request *request) +int ptlrpc_error(struct ptlrpc_request *req) { - int rc; - int rc2; - struct ptlrpc_connection *connection; - unsigned long flags; - ptl_handle_me_t reply_me_h; - ptl_md_t reply_md; - ENTRY; + return ptlrpc_send_error(req, 0); +} - LASSERT (request->rq_type == PTL_RPC_MSG_REQUEST); +/** + * 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 lnet_handle_md bulk_cookie; + struct ptlrpc_connection *connection; + struct lnet_handle_me reply_me_h; + struct lnet_md reply_md; + struct obd_import *imp = request->rq_import; + struct obd_device *obd = imp->imp_obd; + ENTRY; + + LNetInvalidateMDHandle(&bulk_cookie); + + 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); - - connection = request->rq_import->imp_connection; - - if (request->rq_bulk != NULL) { - rc = ptlrpc_register_bulk (request); - if (rc != 0) - RETURN(rc); + LASSERT(!request->rq_receiving_reply); + LASSERT(!((lustre_msg_get_flags(request->rq_reqmsg) & MSG_REPLAY) && + (imp->imp_state == LUSTRE_IMP_FULL))); + + if (unlikely(obd != NULL && obd->obd_fail)) { + CDEBUG(D_HA, "muting rpc for failed imp obd %s\n", + obd->obd_name); + /* this prevents us from waiting in ptlrpc_queue_wait */ + spin_lock(&request->rq_lock); + request->rq_err = 1; + spin_unlock(&request->rq_lock); + request->rq_status = -ENODEV; + RETURN(-ENODEV); } - request->rq_reqmsg->handle = request->rq_import->imp_remote_handle; - request->rq_reqmsg->type = PTL_RPC_MSG_REQUEST; - request->rq_reqmsg->conn_cnt = request->rq_import->imp_conn_cnt; - - /* wrap_request might need to refresh gss cred, if this is called - * in ptlrpcd then the whole daemon thread will be waiting on - * gss negotiate rpc. FIXME - */ - rc = ptlrpcs_cli_wrap_request(request); - if (rc) - GOTO(cleanup_bulk, rc); - - LASSERT (request->rq_replen != 0); - if (request->rq_repbuf == NULL) { - rc = ptlrpcs_cli_alloc_repbuf(request, request->rq_replen); - if (rc) - GOTO(cleanup_bulk, rc); - } + connection = imp->imp_connection; + + lustre_msg_set_handle(request->rq_reqmsg, + &imp->imp_remote_handle); + lustre_msg_set_type(request->rq_reqmsg, PTL_RPC_MSG_REQUEST); + lustre_msg_set_conn_cnt(request->rq_reqmsg, + imp->imp_conn_cnt); + lustre_msghdr_set_flags(request->rq_reqmsg, + imp->imp_msghdr_flags); + + /* If it's the first time to resend the request for EINPROGRESS, + * we need to allocate a new XID (see after_reply()), it's different + * from the resend for reply timeout. */ + if (request->rq_nr_resend != 0 && + list_empty(&request->rq_unreplied_list)) { + __u64 min_xid = 0; + /* resend for EINPROGRESS, allocate new xid to avoid reply + * reconstruction */ + spin_lock(&imp->imp_lock); + ptlrpc_assign_next_xid_nolock(request); + min_xid = ptlrpc_known_replied_xid(imp); + spin_unlock(&imp->imp_lock); + + lustre_msg_set_last_xid(request->rq_reqmsg, min_xid); + DEBUG_REQ(D_RPCTRACE, request, "Allocating new xid for " + "resend on EINPROGRESS"); + } + + if (request->rq_bulk != NULL) { + ptlrpc_set_bulk_mbits(request); + lustre_msg_set_mbits(request->rq_reqmsg, request->rq_mbits); + } + + if (list_empty(&request->rq_unreplied_list) || + request->rq_xid <= imp->imp_known_replied_xid) { + DEBUG_REQ(D_ERROR, request, "xid: %llu, replied: %llu, " + "list_empty:%d\n", request->rq_xid, + imp->imp_known_replied_xid, + list_empty(&request->rq_unreplied_list)); + LBUG(); + } + + /** For enabled AT all request should have AT_SUPPORT in the + * FULL import state when OBD_CONNECT_AT is set */ + LASSERT(AT_OFF || imp->imp_state != LUSTRE_IMP_FULL || + (imp->imp_msghdr_flags & MSGHDR_AT_SUPPORT) || + !(imp->imp_connect_data.ocd_connect_flags & + OBD_CONNECT_AT)); + + if (request->rq_resend) { + lustre_msg_add_flags(request->rq_reqmsg, MSG_RESENT); + if (request->rq_resend_cb != NULL) + request->rq_resend_cb(request, &request->rq_async_args); + } + 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); + /* + * All the mds in the request will have the same cpt + * encoded in the cookie. So we can just get the first + * one. + */ + bulk_cookie = request->rq_bulk->bd_mds[0]; + } + + 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 */ + spin_lock(&request->rq_lock); + request->rq_err = 1; + spin_unlock(&request->rq_lock); + request->rq_status = rc; + GOTO(cleanup_bulk, rc); + } + } else { + request->rq_repdata = NULL; + request->rq_repmsg = NULL; + } - rc = PtlMEAttach(connection->c_peer.peer_ni->pni_ni_h, - request->rq_reply_portal, /* XXX FIXME bug 249 */ - connection->c_peer.peer_id, request->rq_xid, 0, - PTL_UNLINK, PTL_INS_AFTER, &reply_me_h); - if (rc != PTL_OK) { - CERROR("PtlMEAttach failed: %d\n", rc); - LASSERT (rc == PTL_NO_SPACE); - GOTO(cleanup_repmsg, rc = -ENOMEM); + 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_irqsave (&request->rq_lock, flags); - /* If the MD attach succeeds, there _will_ be a reply_in callback */ - request->rq_receiving_reply = 1; - /* Clear any flags that may be present from previous sends. */ + spin_lock(&request->rq_lock); + /* We are responsible for unlinking the reply buffer */ + request->rq_reply_unlinked = noreply; + request->rq_receiving_reply = !noreply; + /* Clear any flags that may be present from previous sends. */ + request->rq_req_unlinked = 0; 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_ptlrpcs_restart = 0; - request->rq_ptlrpcs_err = 0; - spin_unlock_irqrestore (&request->rq_lock, flags); - - reply_md.start = request->rq_repbuf; - reply_md.length = request->rq_repbuf_len; - reply_md.threshold = 1; - reply_md.options = PTLRPC_MD_OPTIONS | PTL_MD_OP_PUT; - reply_md.user_ptr = &request->rq_reply_cbid; - reply_md.eq_handle = connection->c_peer.peer_ni->pni_eq_h; - - rc = PtlMDAttach(reply_me_h, reply_md, PTL_UNLINK, - &request->rq_reply_md_h); - if (rc != PTL_OK) { - CERROR("PtlMDAttach failed: %d\n", rc); - LASSERT (rc == PTL_NO_SPACE); - GOTO(cleanup_me, rc -ENOMEM); - } + request->rq_reply_truncated = 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 set rq_reply_unlinked, + * 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 on %s\n", - request->rq_replen, request->rq_xid, - request->rq_reply_portal, - connection->c_peer.peer_ni->pni_name); - - ptlrpc_request_addref(request); /* +1 ref for the SENT callback */ - - request->rq_sent = LTIME_S(CURRENT_TIME); - rc = ptl_send_buf(&request->rq_req_md_h, - request->rq_reqbuf, request->rq_reqdata_len, - PTL_NOACK_REQ, &request->rq_req_cbid, - connection, - request->rq_request_portal, - request->rq_xid); - if (rc == 0) { - ptlrpc_lprocfs_rpc_sent(request); - RETURN(rc); + CDEBUG(D_NET, "Setup reply buffer: %u bytes, xid %llu" + ", portal %u\n", + request->rq_repbuf_len, request->rq_xid, + request->rq_reply_portal); } - ptlrpc_req_finished (request); /* drop callback ref */ + /* add references on request for request_out_callback */ + ptlrpc_request_addref(request); + if (obd != NULL && obd->obd_svc_stats != NULL) + lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQACTIVE_CNTR, + atomic_read(&imp->imp_inflight)); + + OBD_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_DELAY_SEND, request->rq_timeout + 5); + + request->rq_sent_ns = ktime_get_real(); + request->rq_sent = ktime_get_real_seconds(); + /* 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(imp); + + 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, + LNET_NID_ANY, connection->c_peer, + request->rq_request_portal, + request->rq_xid, 0, &bulk_cookie); + if (likely(rc == 0)) + GOTO(out, rc); + + request->rq_req_unlinked = 1; + 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 = PtlMEUnlink(reply_me_h); - LASSERT (rc2 == PTL_OK); + rc2 = LNetMEUnlink(reply_me_h); + LASSERT (rc2 == 0); /* UNLINKED callback called synchronously */ - LASSERT (!request->rq_receiving_reply); - - cleanup_repmsg: - ptlrpcs_cli_free_repbuf(request); + LASSERT(!request->rq_receiving_reply); cleanup_bulk: - if (request->rq_bulk != NULL) - ptlrpc_unregister_bulk(request); - - return rc; + /* 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 (rc == -ENOMEM) { + /* set rq_sent so that this request is treated + * as a delayed send in the upper layers */ + request->rq_sent = ktime_get_real_seconds(); + } + + if (request->rq_memalloc) + cfs_memory_pressure_restore(mpflag); + + return rc; } +EXPORT_SYMBOL(ptl_send_rpc); -int ptlrpc_register_rqbd (struct ptlrpc_request_buffer_desc *rqbd) +/** + * Register request buffer descriptor for request receiving. + */ +int ptlrpc_register_rqbd(struct ptlrpc_request_buffer_desc *rqbd) { - struct ptlrpc_srv_ni *srv_ni = rqbd->rqbd_srv_ni; - struct ptlrpc_service *service = srv_ni->sni_service; - static ptl_process_id_t match_id = {PTL_NID_ANY, PTL_PID_ANY}; - int rc; - ptl_md_t md; - ptl_handle_me_t me_h; + struct ptlrpc_service *service = rqbd->rqbd_svcpt->scp_service; + static struct lnet_process_id match_id = {LNET_NID_ANY, LNET_PID_ANY}; + int rc; + struct lnet_md md; + struct lnet_handle_me me_h; - CDEBUG(D_NET, "PtlMEAttach: portal %d on %s\n", - service->srv_req_portal, srv_ni->sni_ni->pni_name); + CDEBUG(D_NET, "LNetMEAttach: portal %d\n", + service->srv_req_portal); - if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_PTLRPC_RQBD)) + if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_RQBD)) return (-ENOMEM); - rc = PtlMEAttach(srv_ni->sni_ni->pni_ni_h, service->srv_req_portal, - match_id, 0, ~0, PTL_UNLINK, PTL_INS_AFTER, &me_h); - if (rc != PTL_OK) { - CERROR("PtlMEAttach failed: %d\n", rc); + /* 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); } @@ -539,263 +973,20 @@ int ptlrpc_register_rqbd (struct ptlrpc_request_buffer_desc *rqbd) md.start = rqbd->rqbd_buffer; md.length = service->srv_buf_size; md.max_size = service->srv_max_req_size; - md.threshold = PTL_MD_THRESH_INF; - md.options = PTLRPC_MD_OPTIONS | PTL_MD_OP_PUT | PTL_MD_MAX_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 = srv_ni->sni_ni->pni_eq_h; - - rc = PtlMDAttach(me_h, md, PTL_UNLINK, &rqbd->rqbd_md_h); - if (rc == PTL_OK) + md.eq_handle = ptlrpc_eq_h; + + rc = LNetMDAttach(me_h, md, LNET_UNLINK, &rqbd->rqbd_md_h); + if (rc == 0) return (0); - CERROR("PtlMDAttach failed: %d; \n", rc); - LASSERT (rc == PTL_NO_SPACE); - rc = PtlMEUnlink (me_h); - LASSERT (rc == PTL_OK); + CERROR("LNetMDAttach failed: %d; \n", rc); + LASSERT (rc == -ENOMEM); + rc = LNetMEUnlink (me_h); + LASSERT (rc == 0); rqbd->rqbd_refcount = 0; - - return (-ENOMEM); -} - -/******************************************** - * rawrpc stuff, currently only used by gss * - ********************************************/ - -static int rawrpc_timedout(void *data) -{ - struct ptlrpc_request *req = (struct ptlrpc_request *) data; - unsigned long flags; - - spin_lock_irqsave(&req->rq_lock, flags); - if (!req->rq_replied) - req->rq_timedout = 1; - spin_unlock_irqrestore(&req->rq_lock, flags); - - return 1; -} - -static int rawrpc_timedout_wait(void *data) -{ - return 0; -} - -/* to make things as simple as possible */ -static int rawrpc_check_reply(struct ptlrpc_request *req) -{ - unsigned long flags; - int rc; - - spin_lock_irqsave (&req->rq_lock, flags); - rc = req->rq_replied || req->rq_net_err || req->rq_err || - req->rq_resend || req->rq_restart; - spin_unlock_irqrestore(&req->rq_lock, flags); - return rc; -} - -void rawrpc_req_finished(struct ptlrpc_request *req) -{ - struct obd_import *imp; - unsigned long irq_flags; - - if (!req) - return; - - if (!atomic_dec_and_test(&req->rq_refcount)) - return; - - LASSERT(req->rq_import); - imp = req->rq_import; - - spin_lock_irqsave(&imp->imp_lock, irq_flags); - list_del_init(&req->rq_list); - spin_unlock_irqrestore(&imp->imp_lock, irq_flags); - - class_import_put(imp); - - if (req->rq_reqbuf) { - LASSERT(req->rq_reqbuf_len); - OBD_FREE(req->rq_reqbuf, req->rq_reqbuf_len); - } - if (req->rq_repbuf) { - LASSERT(req->rq_repbuf_len); - OBD_FREE(req->rq_repbuf, req->rq_repbuf_len); - } - OBD_FREE(req, sizeof(*req)); -} - -/* - * if returned non-NULL, reqbuf and repbuf will be take over by the - * request: the caller can't release them directly, instead should - * call rawrpc_req_finished(). - */ -struct ptlrpc_request * -ptl_do_rawrpc(struct obd_import *imp, - char *reqbuf, int reqbuf_len, int reqlen, - char *repbuf, int repbuf_len, int *replenp, - int timeout, int *res) -{ - struct ptlrpc_connection *conn; - struct ptlrpc_request *request; - ptl_handle_me_t reply_me_h; - ptl_md_t reply_md, req_md; - struct l_wait_info lwi; - unsigned long irq_flags; - int rc; - ENTRY; - - LASSERT(imp); - LASSERT(reqbuf && reqbuf_len); - LASSERT(repbuf && repbuf_len); - LASSERT(reqlen && reqlen <= reqbuf_len); - - OBD_ALLOC(request, sizeof(*request)); - if (!request) { - *res = -ENOMEM; - RETURN(NULL); - } - - imp = request->rq_import = class_import_get(imp); - conn = imp->imp_connection; - - if (imp->imp_state == LUSTRE_IMP_CLOSED) { - CDEBUG(D_SEC, "raw rpc on closed imp(=>%s)\n", - imp->imp_target_uuid.uuid); - } - - /* initialize request */ - request->rq_req_cbid.cbid_fn = rawrpc_request_out_callback; - request->rq_req_cbid.cbid_arg = request; - request->rq_reply_cbid.cbid_fn = reply_in_callback; - request->rq_reply_cbid.cbid_arg = request; - request->rq_reqbuf = reqbuf; - request->rq_reqbuf_len = reqbuf_len; - request->rq_repbuf = repbuf; - request->rq_repbuf_len = repbuf_len; - request->rq_set = NULL; - spin_lock_init(&request->rq_lock); - init_waitqueue_head(&request->rq_reply_waitq); - atomic_set(&request->rq_refcount, 1); - request->rq_xid = ptlrpc_next_xid(); - - /* add into sending list */ - spin_lock_irqsave(&imp->imp_lock, irq_flags); - list_add_tail(&request->rq_list, &imp->imp_rawrpc_list); - spin_unlock_irqrestore(&imp->imp_lock, irq_flags); - - /* prepare reply buffer */ - rc = PtlMEAttach(conn->c_peer.peer_ni->pni_ni_h, - imp->imp_client->cli_reply_portal, - conn->c_peer.peer_id, request->rq_xid, 0, PTL_UNLINK, - PTL_INS_AFTER, &reply_me_h); - if (rc != PTL_OK) { - CERROR("PtlMEAttach failed: %d\n", rc); - LASSERT (rc == PTL_NO_SPACE); - GOTO(out, rc = -ENOMEM); - } - - spin_lock_irqsave(&request->rq_lock, irq_flags); - request->rq_receiving_reply = 1; - spin_unlock_irqrestore(&request->rq_lock, irq_flags); - - reply_md.start = repbuf; - reply_md.length = repbuf_len; - reply_md.threshold = 1; - reply_md.options = PTLRPC_MD_OPTIONS | PTL_MD_OP_PUT; - reply_md.user_ptr = &request->rq_reply_cbid; - reply_md.eq_handle = conn->c_peer.peer_ni->pni_eq_h; - - rc = PtlMDAttach(reply_me_h, reply_md, PTL_UNLINK, - &request->rq_reply_md_h); - if (rc != PTL_OK) { - CERROR("PtlMDAttach failed: %d\n", rc); - LASSERT (rc == PTL_NO_SPACE); - GOTO(cleanup_me, rc = -ENOMEM); - } - - /* - * the extra 2 refcount will be balanced by out_callback - */ - atomic_set(&request->rq_refcount, 3); - - /* prepare request buffer */ - req_md.start = reqbuf; - req_md.length = reqlen; - req_md.threshold = 1; - req_md.options = PTLRPC_MD_OPTIONS; - req_md.user_ptr = &request->rq_req_cbid; - req_md.eq_handle = conn->c_peer.peer_ni->pni_eq_h; - - rc = PtlMDBind(conn->c_peer.peer_ni->pni_ni_h, - req_md, PTL_UNLINK, &request->rq_req_md_h); - if (rc != PTL_OK) { - CERROR("PtlMDBind failed %d\n", rc); - LASSERT (rc == PTL_NO_SPACE); - atomic_set(&request->rq_refcount, 1); - GOTO(cleanup_me, rc = -ENOMEM); - } - - rc = PtlPut(request->rq_req_md_h, PTL_NOACK_REQ, conn->c_peer.peer_id, - imp->imp_client->cli_request_portal, 0, - request->rq_xid, 0, 0); - if (rc != PTL_OK) { - CERROR("PtlPut failed %d\n", rc); - GOTO(cleanup_md, rc); - } - - if (timeout) - lwi = LWI_TIMEOUT(timeout * HZ, rawrpc_timedout, request); - else - lwi = LWI_TIMEOUT(100 * HZ, rawrpc_timedout_wait, request); - - l_wait_event(request->rq_reply_waitq, - rawrpc_check_reply(request), &lwi); - - ptlrpc_unregister_reply(request); - - if (request->rq_replied) { - *replenp = request->rq_nob_received; - rc = 0; - } else { - CERROR("rawrpc error: err %d, neterr %d, int %d, timedout %d\n", - request->rq_err, request->rq_net_err, - request->rq_intr, request->rq_timedout); - - /* give timedout higher priority */ - rc = request->rq_timedout ? -ETIMEDOUT : -EIO; - } - -out: - *res = rc; - RETURN(request); - -cleanup_md: - PtlMDUnlink(request->rq_req_md_h); -cleanup_me: - PtlMEUnlink(reply_me_h); - goto out; -} - -/* - * caller will take care the reqbuf & repbuf, and only return - * when the rpc really finished on wire. - */ -int ptl_do_rawrpc_simple(struct obd_import *imp, - char *reqbuf, int reqlen, - char *repbuf, int *replenp) -{ - struct ptlrpc_request *req; - int res; - - req = ptl_do_rawrpc(imp, reqbuf, reqlen, reqlen, - repbuf, *replenp, replenp, 0, &res); - - if (req == NULL) - return res; - - req->rq_reqbuf = req->rq_repbuf = NULL; - req->rq_reqbuf_len = req->rq_repbuf_len = 0; - - rawrpc_req_finished(req); - return res; + return (-ENOMEM); }