-/* -*- 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, 2017, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
*/
#define DEBUG_SUBSYSTEM S_RPC
-#ifdef __KERNEL__
-#include <linux/module.h>
-#else
-#include <liblustre.h>
-#endif
-#include <linux/obd_class.h>
-#include <linux/lustre_net.h>
+#include <libcfs/libcfs.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <obd_class.h>
+#include <lustre_net.h>
+#include <lustre_sec.h>
#include "ptlrpc_internal.h"
-#if !defined(__KERNEL__) && defined(CRAY_PORTALS)
-/* forward ref in events.c */
-static void cray_portals_callback(ptl_event_t *ev);
-#endif
+lnet_handler_t ptlrpc_handler;
+struct percpu_ref ptlrpc_pending;
-
-struct ptlrpc_ni ptlrpc_interfaces[8];
-int ptlrpc_ninterfaces;
-
-/*
+/*
* Client's outgoing request callback
*/
-void request_out_callback(ptl_event_t *ev)
+void request_out_callback(struct lnet_event *ev)
{
- struct ptlrpc_cb_id *cbid = ev->md.user_ptr;
- struct ptlrpc_request *req = cbid->cbid_arg;
- unsigned long flags;
- ENTRY;
-
- LASSERT (ev->type == PTL_EVENT_SEND_END ||
- ev->type == PTL_EVENT_UNLINK);
- LASSERT (ev->unlinked);
-
- DEBUG_REQ((ev->ni_fail_type == PTL_NI_OK) ? D_NET : D_ERROR, req,
- "type %d, status %d", ev->type, ev->ni_fail_type);
-
- if (ev->type == PTL_EVENT_UNLINK ||
- ev->ni_fail_type != PTL_NI_OK) {
-
- /* Failed send: make it seem like the reply timed out, just
- * like failing sends in client.c does currently... */
-
- spin_lock_irqsave(&req->rq_lock, flags);
- req->rq_net_err = 1;
- spin_unlock_irqrestore(&req->rq_lock, flags);
-
- ptlrpc_wake_client_req(req);
- }
-
- /* this balances the atomic_inc in ptl_send_rpc() */
- ptlrpc_req_finished(req);
- EXIT;
+ struct ptlrpc_cb_id *cbid = ev->md_user_ptr;
+ struct ptlrpc_request *req = cbid->cbid_arg;
+ bool wakeup = false;
+ ENTRY;
+
+ LASSERT(ev->type == LNET_EVENT_SEND || ev->type == LNET_EVENT_UNLINK);
+ LASSERT(ev->unlinked);
+
+ if (unlikely(lustre_msg_get_opc(req->rq_reqmsg) == cfs_fail_val &&
+ CFS_FAIL_CHECK_RESET(OBD_FAIL_NET_ERROR_RPC,
+ OBD_FAIL_OSP_PRECREATE_PAUSE |
+ CFS_FAIL_ONCE)))
+ ev->status = -ECONNABORTED;
+
+ DEBUG_REQ(D_NET, req, "type %d, status %d", ev->type, ev->status);
+
+ /* Do not update imp_next_ping for connection request */
+ if (lustre_msg_get_opc(req->rq_reqmsg) !=
+ req->rq_import->imp_connect_op)
+ ptlrpc_pinger_sending_on_import(req->rq_import);
+
+ sptlrpc_request_out_callback(req);
+
+ spin_lock(&req->rq_lock);
+ req->rq_real_sent = ktime_get_real_seconds();
+ req->rq_req_unlinked = 1;
+ /* reply_in_callback happened before request_out_callback? */
+ if (req->rq_reply_unlinked)
+ wakeup = true;
+
+ if (ev->type == LNET_EVENT_UNLINK || ev->status != 0) {
+ /* Failed send: make it seem like the reply timed out, just
+ * like failing sends in client.c does currently... */
+ req->rq_net_err = 1;
+ wakeup = true;
+ }
+
+ if (wakeup)
+ ptlrpc_client_wake_req(req);
+
+ spin_unlock(&req->rq_lock);
+
+ ptlrpc_req_finished(req);
+ EXIT;
}
/*
* Client's incoming reply callback
*/
-void reply_in_callback(ptl_event_t *ev)
+void reply_in_callback(struct lnet_event *ev)
{
- struct ptlrpc_cb_id *cbid = ev->md.user_ptr;
- struct ptlrpc_request *req = cbid->cbid_arg;
- unsigned long flags;
- ENTRY;
+ struct ptlrpc_cb_id *cbid = ev->md_user_ptr;
+ struct ptlrpc_request *req = cbid->cbid_arg;
+ ENTRY;
+
+ DEBUG_REQ(D_NET, req, "type %d, status %d", ev->type, ev->status);
+
+ LASSERT(ev->type == LNET_EVENT_PUT || ev->type == LNET_EVENT_UNLINK);
+ LASSERT(ev->md_start == req->rq_repbuf);
+ LASSERT(ev->offset + ev->mlength <= req->rq_repbuf_len);
+ /* We've set LNET_MD_MANAGE_REMOTE for all outgoing requests
+ * for adaptive timeouts' early reply.
+ */
+ LASSERT((ev->md_options & LNET_MD_MANAGE_REMOTE) != 0);
+
+ spin_lock(&req->rq_lock);
+
+ req->rq_receiving_reply = 0;
+ req->rq_early = 0;
+ if (ev->unlinked)
+ req->rq_reply_unlinked = 1;
+
+ if (ev->status)
+ goto out_wake;
+
+ if (ev->type == LNET_EVENT_UNLINK) {
+ LASSERT(ev->unlinked);
+ DEBUG_REQ(D_NET, req, "unlink");
+ goto out_wake;
+ }
+
+ if (ev->mlength < ev->rlength ) {
+ CDEBUG(D_RPCTRACE, "truncate req %p rpc %d - %d+%d\n", req,
+ req->rq_replen, ev->rlength, ev->offset);
+ req->rq_reply_truncated = 1;
+ req->rq_replied = 1;
+ req->rq_status = -EOVERFLOW;
+ req->rq_nob_received = ev->rlength + ev->offset;
+ goto out_wake;
+ }
- LASSERT (ev->type == PTL_EVENT_PUT_END ||
- ev->type == PTL_EVENT_UNLINK);
- LASSERT (ev->unlinked);
- LASSERT (ev->md.start == req->rq_repmsg);
- LASSERT (ev->offset == 0);
- LASSERT (ev->mlength <= req->rq_replen);
-
- DEBUG_REQ((ev->ni_fail_type == PTL_NI_OK) ? D_NET : D_ERROR, req,
- "type %d, status %d", ev->type, ev->ni_fail_type);
+ if ((ev->offset == 0) &&
+ ((lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT))) {
+ /* Early reply */
+ DEBUG_REQ(D_ADAPTTO, req,
+ "Early reply received, mlen=%u offset=%d replen=%d replied=%d unlinked=%d",
+ ev->mlength, ev->offset,
+ req->rq_replen, req->rq_replied, ev->unlinked);
- spin_lock_irqsave (&req->rq_lock, flags);
+ req->rq_early_count++; /* number received, client side */
- LASSERT (req->rq_receiving_reply);
- req->rq_receiving_reply = 0;
+ /* already got the real reply or buffers are already unlinked */
+ if (req->rq_replied ||
+ req->rq_reply_unlinked == 1)
+ goto out_wake;
- if (ev->type == PTL_EVENT_PUT_END &&
- ev->ni_fail_type == PTL_NI_OK) {
+ req->rq_early = 1;
+ req->rq_reply_off = ev->offset;
+ req->rq_nob_received = ev->mlength;
+ /* And we're still receiving */
+ req->rq_receiving_reply = 1;
+ } else {
+ /* Real reply */
+ req->rq_rep_swab_mask = 0;
req->rq_replied = 1;
+ /* Got reply, no resend required */
+ req->rq_resend = 0;
+ req->rq_reply_off = ev->offset;
req->rq_nob_received = ev->mlength;
+ /* LNetMDUnlink can't be called under the LNET_LOCK,
+ so we must unlink in ptlrpc_unregister_reply */
+ DEBUG_REQ(D_INFO, req,
+ "reply in flags=%x mlen=%u offset=%d replen=%d",
+ lustre_msg_get_flags(req->rq_reqmsg),
+ ev->mlength, ev->offset, req->rq_replen);
}
- /* NB don't unlock till after wakeup; req can disappear under us
- * since we don't have our own ref */
- ptlrpc_wake_client_req(req);
+ if (lustre_msg_get_opc(req->rq_reqmsg) != OBD_PING)
+ req->rq_import->imp_last_reply_time = ktime_get_real_seconds();
- spin_unlock_irqrestore (&req->rq_lock, flags);
- EXIT;
+out_wake:
+ /* NB don't unlock till after wakeup; req can disappear under us
+ * since we don't have our own ref */
+ ptlrpc_client_wake_req(req);
+ spin_unlock(&req->rq_lock);
+ EXIT;
}
-/*
+/*
* Client's bulk has been written/read
*/
-void client_bulk_callback (ptl_event_t *ev)
+void client_bulk_callback(struct lnet_event *ev)
{
- struct ptlrpc_cb_id *cbid = ev->md.user_ptr;
- struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
- unsigned long flags;
- ENTRY;
-
- LASSERT ((desc->bd_type == BULK_PUT_SINK &&
- ev->type == PTL_EVENT_PUT_END) ||
- (desc->bd_type == BULK_GET_SOURCE &&
- ev->type == PTL_EVENT_GET_END) ||
- ev->type == PTL_EVENT_UNLINK);
- LASSERT (ev->unlinked);
-
- CDEBUG((ev->ni_fail_type == PTL_NI_OK) ? D_NET : D_ERROR,
- "event type %d, status %d, desc %p\n",
- ev->type, ev->ni_fail_type, desc);
-
- spin_lock_irqsave (&desc->bd_lock, flags);
+ struct ptlrpc_cb_id *cbid = ev->md_user_ptr;
+ struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
+ struct ptlrpc_request *req;
+ ENTRY;
+
+ LASSERT((ptlrpc_is_bulk_put_sink(desc->bd_type) &&
+ ev->type == LNET_EVENT_PUT) ||
+ (ptlrpc_is_bulk_get_source(desc->bd_type) &&
+ ev->type == LNET_EVENT_GET) ||
+ ev->type == LNET_EVENT_UNLINK);
+ LASSERT(ev->unlinked);
+
+ if (CFS_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB, CFS_FAIL_ONCE))
+ ev->status = -EIO;
+
+ if (CFS_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2,CFS_FAIL_ONCE))
+ ev->status = -EIO;
+
+ CDEBUG_LIMIT((ev->status == 0) ? D_NET : D_ERROR,
+ "event type %d, status %d, desc %p\n",
+ ev->type, ev->status, desc);
+
+ spin_lock(&desc->bd_lock);
+ req = desc->bd_req;
+ LASSERT(desc->bd_refs > 0);
+ desc->bd_refs--;
+
+ if (ev->type != LNET_EVENT_UNLINK && ev->status == 0) {
+ desc->bd_nob_transferred += ev->mlength;
+ desc->bd_sender = ev->sender;
+ } else {
+ /* start reconnect and resend if network error hit */
+ spin_lock(&req->rq_lock);
+ req->rq_net_err = 1;
+ spin_unlock(&req->rq_lock);
+ desc->bd_failure = 1;
+ }
+
+
+ /* NB don't unlock till after wakeup; desc can disappear under us
+ * otherwise */
+ if (desc->bd_refs == 0)
+ ptlrpc_client_wake_req(desc->bd_req);
+
+ spin_unlock(&desc->bd_lock);
+ EXIT;
+}
- LASSERT(desc->bd_network_rw);
- desc->bd_network_rw = 0;
+/*
+ * We will have percpt request history list for ptlrpc service in upcoming
+ * patches because we don't want to be serialized by current per-service
+ * history operations. So we require history ID can (somehow) show arriving
+ * order w/o grabbing global lock, and user can sort them in userspace.
+ *
+ * This is how we generate history ID for ptlrpc_request:
+ * ----------------------------------------------------
+ * | 32 bits | 16 bits | (16 - X)bits | X bits |
+ * ----------------------------------------------------
+ * | seconds | usec / 16 | sequence | CPT id |
+ * ----------------------------------------------------
+ *
+ * it might not be precise but should be good enough.
+ */
- if (ev->type != PTL_EVENT_UNLINK &&
- ev->ni_fail_type == PTL_NI_OK) {
- desc->bd_success = 1;
- desc->bd_nob_transferred = ev->mlength;
- }
+#define REQS_CPT_BITS(svcpt) ((svcpt)->scp_service->srv_cpt_bits)
- /* NB don't unlock till after wakeup; desc can disappear under us
- * otherwise */
- ptlrpc_wake_client_req(desc->bd_req);
+#define REQS_SEC_SHIFT 32
+#define REQS_USEC_SHIFT 16
+#define REQS_SEQ_SHIFT(svcpt) REQS_CPT_BITS(svcpt)
- spin_unlock_irqrestore (&desc->bd_lock, flags);
- EXIT;
+static void ptlrpc_req_add_history(struct ptlrpc_service_part *svcpt,
+ struct ptlrpc_request *req)
+{
+ u64 sec = req->rq_arrival_time.tv_sec;
+ u32 usec = req->rq_arrival_time.tv_nsec / NSEC_PER_USEC / 16; /* usec / 16 */
+ u64 new_seq;
+
+ /* set sequence ID for request and add it to history list,
+ * it must be called with hold svcpt::scp_lock */
+
+ new_seq = (sec << REQS_SEC_SHIFT) |
+ (usec << REQS_USEC_SHIFT) |
+ (svcpt->scp_cpt < 0 ? 0 : svcpt->scp_cpt);
+
+ if (new_seq > svcpt->scp_hist_seq) {
+ /* This handles the initial case of scp_hist_seq == 0 or
+ * we just jumped into a new time window */
+ svcpt->scp_hist_seq = new_seq;
+ } else {
+ LASSERT(REQS_SEQ_SHIFT(svcpt) < REQS_USEC_SHIFT);
+ /* NB: increase sequence number in current usec bucket,
+ * however, it's possible that we used up all bits for
+ * sequence and jumped into the next usec bucket (future time),
+ * then we hope there will be less RPCs per bucket at some
+ * point, and sequence will catch up again */
+ svcpt->scp_hist_seq += (1U << REQS_SEQ_SHIFT(svcpt));
+ new_seq = svcpt->scp_hist_seq;
+ }
+
+ req->rq_history_seq = new_seq;
+
+ list_add_tail(&req->rq_history_list, &svcpt->scp_hist_reqs);
}
-/*
+/*
* Server's incoming request callback
*/
-void request_in_callback(ptl_event_t *ev)
+void request_in_callback(struct lnet_event *ev)
{
- struct ptlrpc_cb_id *cbid = ev->md.user_ptr;
- struct ptlrpc_request_buffer_desc *rqbd = cbid->cbid_arg;
- struct ptlrpc_srv_ni *srv_ni = rqbd->rqbd_srv_ni;
- struct ptlrpc_service *service = srv_ni->sni_service;
- struct ptlrpc_request *req;
- char str[PTL_NALFMT_SIZE];
- unsigned long flags;
- ENTRY;
-
- LASSERT (ev->type == PTL_EVENT_PUT_END ||
- ev->type == PTL_EVENT_UNLINK);
- LASSERT ((char *)ev->md.start >= rqbd->rqbd_buffer);
- LASSERT ((char *)ev->md.start + ev->offset + ev->mlength <=
- rqbd->rqbd_buffer + service->srv_buf_size);
-
- CDEBUG((ev->ni_fail_type == PTL_OK) ? D_NET : D_ERROR,
- "event type %d, status %d, service %s\n",
- ev->type, ev->ni_fail_type, service->srv_name);
-
- if (ev->unlinked) {
- /* If this is the last request message to fit in the
- * request buffer we can use the request object embedded in
- * rqbd. Note that if we failed to allocate a request,
- * we'd have to re-post the rqbd, which we can't do in this
- * context. */
- req = &rqbd->rqbd_req;
- memset(req, 0, sizeof (*req));
- } else {
- LASSERT (ev->type == PTL_EVENT_PUT_END);
- if (ev->ni_fail_type != PTL_NI_OK) {
- /* We moaned above already... */
- return;
- }
- OBD_ALLOC_GFP(req, sizeof(*req), GFP_ATOMIC);
+ struct ptlrpc_cb_id *cbid = ev->md_user_ptr;
+ struct ptlrpc_request_buffer_desc *rqbd = cbid->cbid_arg;
+ struct ptlrpc_service_part *svcpt = rqbd->rqbd_svcpt;
+ struct ptlrpc_service *service = svcpt->scp_service;
+ struct ptlrpc_request *req;
+ ENTRY;
+
+ LASSERT(ev->type == LNET_EVENT_PUT ||
+ ev->type == LNET_EVENT_UNLINK);
+ LASSERT((char *)ev->md_start >= rqbd->rqbd_buffer);
+ LASSERT((char *)ev->md_start + ev->offset + ev->mlength <=
+ rqbd->rqbd_buffer + service->srv_buf_size);
+
+ CDEBUG_LIMIT((ev->status == 0) ? D_NET : D_ERROR,
+ "event type %d, status %d, service %s\n",
+ ev->type, ev->status, service->srv_name);
+
+ if (ev->unlinked) {
+ /* If this is the last request message to fit in the
+ * request buffer we can use the request object embedded in
+ * rqbd. Note that if we failed to allocate a request,
+ * we'd have to re-post the rqbd, which we can't do in this
+ * context.
+ */
+ req = &rqbd->rqbd_req;
+ memset(req, 0, sizeof(*req));
+ } else {
+ LASSERT(ev->type == LNET_EVENT_PUT);
+ if (ev->status != 0) /* We moaned above already... */
+ return;
+ req = ptlrpc_request_cache_alloc(GFP_ATOMIC);
if (req == NULL) {
CERROR("Can't allocate incoming request descriptor: "
"Dropping %s RPC from %s\n",
- service->srv_name,
- portals_id2str(srv_ni->sni_ni->pni_number,
- ev->initiator, str));
+ service->srv_name,
+ libcfs_id2str(ev->initiator));
return;
}
}
- /* NB we ABSOLUTELY RELY on req being zeroed, so pointers are NULL,
- * flags are reset and scalars are zero. We only set the message
- * size to non-zero if this was a successful receive. */
- req->rq_xid = ev->match_bits;
- req->rq_reqmsg = ev->md.start + ev->offset;
- if (ev->type == PTL_EVENT_PUT_END &&
- ev->ni_fail_type == PTL_NI_OK)
- req->rq_reqlen = ev->mlength;
- do_gettimeofday(&req->rq_arrival_time);
- req->rq_peer.peer_id = ev->initiator;
- req->rq_peer.peer_ni = rqbd->rqbd_srv_ni->sni_ni;
- req->rq_rqbd = rqbd;
-
- spin_lock_irqsave (&service->srv_lock, flags);
+ ptlrpc_srv_req_init(req);
+ /* NB we ABSOLUTELY RELY on req being zeroed, so pointers are NULL,
+ * flags are reset and scalars are zero. We only set the message
+ * size to non-zero if this was a successful receive. */
+ req->rq_xid = ev->match_bits;
+ req->rq_reqbuf = ev->md_start + ev->offset;
+ if (ev->type == LNET_EVENT_PUT && ev->status == 0)
+ req->rq_reqdata_len = ev->mlength;
+ ktime_get_real_ts64(&req->rq_arrival_time);
+ /* Multi-Rail: keep track of both initiator and source NID. */
+ req->rq_peer = ev->initiator;
+ req->rq_source = ev->source;
+ req->rq_self = ev->target.nid;
+ req->rq_rqbd = rqbd;
+ req->rq_phase = RQ_PHASE_NEW;
+ if (ev->type == LNET_EVENT_PUT)
+ CDEBUG(D_INFO, "incoming req@%p x%llu msgsize %u\n",
+ req, req->rq_xid, ev->mlength);
+
+ CDEBUG(D_RPCTRACE, "peer: %s (source: %s)\n",
+ libcfs_id2str(req->rq_peer), libcfs_id2str(req->rq_source));
+
+ spin_lock(&svcpt->scp_lock);
+
+ ptlrpc_req_add_history(svcpt, req);
+
+ if (ev->unlinked) {
+ svcpt->scp_nrqbds_posted--;
+ CDEBUG(D_INFO, "Buffer complete: %d buffers still posted\n",
+ svcpt->scp_nrqbds_posted);
+
+ /* Normally, don't complain about 0 buffers posted; LNET won't
+ * drop incoming reqs since we set the portal lazy */
+ if (test_req_buffer_pressure &&
+ ev->type != LNET_EVENT_UNLINK &&
+ svcpt->scp_nrqbds_posted == 0)
+ CWARN("All %s request buffers busy\n",
+ service->srv_name);
- if (ev->unlinked) {
- srv_ni->sni_nrqbd_receiving--;
- if (ev->type != PTL_EVENT_UNLINK &&
- srv_ni->sni_nrqbd_receiving == 0) {
- /* This service is off-air on this interface because
- * all its request buffers are busy. Portals will
- * start dropping incoming requests until more buffers
- * get posted. NB don't moan if it's because we're
- * tearing down the service. */
- CWARN("All %s %s request buffers busy\n",
- service->srv_name, srv_ni->sni_ni->pni_name);
- }
/* req takes over the network's ref on rqbd */
} else {
/* req takes a ref on rqbd */
rqbd->rqbd_refcount++;
}
- list_add_tail(&req->rq_list, &service->srv_request_queue);
- service->srv_n_queued_reqs++;
+ list_add_tail(&req->rq_list, &svcpt->scp_req_incoming);
+ svcpt->scp_nreqs_incoming++;
- /* NB everything can disappear under us once the request
- * has been queued and we unlock, so do the wake now... */
- wake_up(&service->srv_waitq);
+ /* NB everything can disappear under us once the request
+ * has been queued and we unlock, so do the wake now... */
+ wake_up(&svcpt->scp_waitq);
- spin_unlock_irqrestore(&service->srv_lock, flags);
- EXIT;
+ spin_unlock(&svcpt->scp_lock);
+ EXIT;
}
-/*
+/*
* Server's outgoing reply callback
*/
-void reply_out_callback(ptl_event_t *ev)
+void reply_out_callback(struct lnet_event *ev)
{
- struct ptlrpc_cb_id *cbid = ev->md.user_ptr;
- struct ptlrpc_reply_state *rs = cbid->cbid_arg;
- struct ptlrpc_srv_ni *sni = rs->rs_srv_ni;
- struct ptlrpc_service *svc = sni->sni_service;
- unsigned long flags;
+ struct ptlrpc_cb_id *cbid = ev->md_user_ptr;
+ struct ptlrpc_reply_state *rs = cbid->cbid_arg;
+ struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
ENTRY;
- LASSERT (ev->type == PTL_EVENT_SEND_END ||
- ev->type == PTL_EVENT_ACK ||
- ev->type == PTL_EVENT_UNLINK);
+ LASSERT (ev->type == LNET_EVENT_SEND ||
+ ev->type == LNET_EVENT_ACK ||
+ ev->type == LNET_EVENT_UNLINK);
if (!rs->rs_difficult) {
- /* I'm totally responsible for freeing "easy" replies */
+ /* 'Easy' replies have no further processing so I drop the
+ * net's ref on 'rs' */
LASSERT (ev->unlinked);
- lustre_free_reply_state (rs);
- atomic_dec (&svc->srv_outstanding_replies);
+ ptlrpc_rs_decref(rs);
EXIT;
return;
}
LASSERT (rs->rs_on_net);
if (ev->unlinked) {
- /* Last network callback */
- spin_lock_irqsave (&svc->srv_lock, flags);
- rs->rs_on_net = 0;
- ptlrpc_schedule_difficult_reply (rs);
- spin_unlock_irqrestore (&svc->srv_lock, flags);
- }
-
- EXIT;
+ /* Last network callback. The net's ref on 'rs' stays put
+ * until ptlrpc_handle_rs() is done with it */
+ spin_lock(&svcpt->scp_rep_lock);
+ spin_lock(&rs->rs_lock);
+
+ rs->rs_on_net = 0;
+ if (!rs->rs_no_ack ||
+ rs->rs_transno <=
+ rs->rs_export->exp_obd->obd_last_committed ||
+ list_empty(&rs->rs_obd_list))
+ ptlrpc_schedule_difficult_reply(rs);
+
+ spin_unlock(&rs->rs_lock);
+ spin_unlock(&svcpt->scp_rep_lock);
+ }
+ EXIT;
}
+#ifdef HAVE_SERVER_SUPPORT
/*
* Server's bulk completion callback
*/
-void server_bulk_callback (ptl_event_t *ev)
+void server_bulk_callback(struct lnet_event *ev)
{
- struct ptlrpc_cb_id *cbid = ev->md.user_ptr;
- struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
- unsigned long flags;
- ENTRY;
-
- LASSERT (ev->type == PTL_EVENT_SEND_END ||
- ev->type == PTL_EVENT_UNLINK ||
- (desc->bd_type == BULK_PUT_SOURCE &&
- ev->type == PTL_EVENT_ACK) ||
- (desc->bd_type == BULK_GET_SINK &&
- ev->type == PTL_EVENT_REPLY_END));
-
- CDEBUG((ev->ni_fail_type == PTL_NI_OK) ? D_NET : D_ERROR,
- "event type %d, status %d, desc %p\n",
- ev->type, ev->ni_fail_type, desc);
-
- spin_lock_irqsave (&desc->bd_lock, flags);
-
- if ((ev->type == PTL_EVENT_ACK ||
- ev->type == PTL_EVENT_REPLY_END) &&
- ev->ni_fail_type == PTL_NI_OK) {
- /* We heard back from the peer, so even if we get this
- * before the SENT event (oh yes we can), we know we
- * read/wrote the peer buffer and how much... */
- desc->bd_success = 1;
- desc->bd_nob_transferred = ev->mlength;
- }
-
- if (ev->unlinked) {
- /* This is the last callback no matter what... */
- desc->bd_network_rw = 0;
- wake_up(&desc->bd_waitq);
- }
-
- spin_unlock_irqrestore (&desc->bd_lock, flags);
- EXIT;
-}
-
-static void ptlrpc_master_callback(ptl_event_t *ev)
-{
- struct ptlrpc_cb_id *cbid = ev->md.user_ptr;
- void (*callback)(ptl_event_t *ev) = cbid->cbid_fn;
-
- /* Honestly, it's best to find out early. */
- LASSERT (cbid->cbid_arg != LP_POISON);
- LASSERT (callback == request_out_callback ||
- callback == reply_in_callback ||
- callback == client_bulk_callback ||
- callback == request_in_callback ||
- callback == reply_out_callback ||
- callback == server_bulk_callback);
-
- callback (ev);
+ struct ptlrpc_cb_id *cbid = ev->md_user_ptr;
+ struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
+ ENTRY;
+
+ LASSERT(ev->type == LNET_EVENT_SEND ||
+ ev->type == LNET_EVENT_UNLINK ||
+ (ptlrpc_is_bulk_put_source(desc->bd_type) &&
+ ev->type == LNET_EVENT_ACK) ||
+ (ptlrpc_is_bulk_get_sink(desc->bd_type) &&
+ ev->type == LNET_EVENT_REPLY));
+
+ CDEBUG_LIMIT((ev->status == 0) ? D_NET : D_ERROR,
+ "event type %d, status %d, desc %p\n",
+ ev->type, ev->status, desc);
+
+ spin_lock(&desc->bd_lock);
+
+ LASSERT(desc->bd_refs > 0);
+
+ if ((ev->type == LNET_EVENT_ACK ||
+ ev->type == LNET_EVENT_REPLY) &&
+ ev->status == 0) {
+ /* We heard back from the peer, so even if we get this
+ * before the SENT event (oh yes we can), we know we
+ * read/wrote the peer buffer and how much... */
+ desc->bd_nob_transferred += ev->mlength;
+ desc->bd_sender = ev->sender;
+ }
+
+ if (ev->status != 0)
+ desc->bd_failure = 1;
+
+ if (ev->unlinked) {
+ desc->bd_refs--;
+ /* This is the last callback no matter what... */
+ if (desc->bd_refs == 0)
+ wake_up(&desc->bd_waitq);
+ }
+
+ spin_unlock(&desc->bd_lock);
+ EXIT;
}
-
-int ptlrpc_uuid_to_peer (struct obd_uuid *uuid, struct ptlrpc_peer *peer)
-{
- struct ptlrpc_ni *pni;
- __u32 peer_nal;
- ptl_nid_t peer_nid;
- int i;
- char str[PTL_NALFMT_SIZE];
- int rc = lustre_uuid_to_peer(uuid->uuid,
- &peer_nal, &peer_nid);
- if (rc != 0)
- RETURN (rc);
-
- for (i = 0; i < ptlrpc_ninterfaces; i++) {
- pni = &ptlrpc_interfaces[i];
-
- if (pni->pni_number == peer_nal) {
- peer->peer_id.nid = peer_nid;
- peer->peer_id.pid = LUSTRE_SRV_PTL_PID; //#4165:only client will call this func.
- peer->peer_ni = pni;
- return (0);
- }
- }
-
- CERROR("Can't find ptlrpc interface for NAL %d, NID %s\n",
- peer_nal, portals_nid2str(peer_nal, peer_nid, str));
- return (-ENOENT);
-}
-
-void ptlrpc_ni_fini(struct ptlrpc_ni *pni)
-{
- wait_queue_head_t waitq;
- struct l_wait_info lwi;
- int rc;
- int retries;
-
- /* Wait for the event queue to become idle since there may still be
- * messages in flight with pending events (i.e. the fire-and-forget
- * messages == client requests and "non-difficult" server
- * replies */
-
- for (retries = 0;; retries++) {
- rc = PtlEQFree(pni->pni_eq_h);
- switch (rc) {
- default:
- LBUG();
-
- case PTL_OK:
- PtlNIFini(pni->pni_ni_h);
- return;
-
- case PTL_EQ_IN_USE:
- if (retries != 0)
- CWARN("Event queue for %s still busy\n",
- pni->pni_name);
-
- /* Wait for a bit */
- init_waitqueue_head(&waitq);
- lwi = LWI_TIMEOUT(2*HZ, NULL, NULL);
- l_wait_event(waitq, 0, &lwi);
- break;
- }
- }
- /* notreached */
-}
-
-ptl_pid_t ptl_get_pid(void)
-{
- ptl_pid_t pid;
-
-#ifndef __KERNEL__
- pid = getpid();
-#else
- pid = LUSTRE_SRV_PTL_PID;
#endif
- return pid;
-}
-
-int ptlrpc_ni_init(int number, char *name, struct ptlrpc_ni *pni)
-{
- int rc;
- char str[20];
- ptl_handle_ni_t nih;
- ptl_pid_t pid;
-
- pid = ptl_get_pid();
-
- /* We're not passing any limits yet... */
- rc = PtlNIInit(number, pid, NULL, NULL, &nih);
- if (rc != PTL_OK && rc != PTL_IFACE_DUP) {
- CDEBUG (D_NET, "Can't init network interface %s: %d\n",
- name, rc);
- return (-ENOENT);
- }
- CDEBUG(D_NET, "My pid is: %x\n", ptl_get_pid());
-
- PtlSnprintHandle(str, sizeof(str), nih);
- CDEBUG (D_NET, "init %d %s: %s\n", number, name, str);
-
- pni->pni_name = name;
- pni->pni_number = number;
- pni->pni_ni_h = nih;
-
- pni->pni_eq_h = PTL_INVALID_HANDLE;
-
- /* CAVEAT EMPTOR: how we process portals events is _radically_
- * different depending on... */
-#ifdef __KERNEL__
- /* kernel portals calls our master callback when events are added to
- * the event queue. In fact lustre never pulls events off this queue,
- * so it's only sized for some debug history. */
- rc = PtlEQAlloc(pni->pni_ni_h, 1024, ptlrpc_master_callback,
- &pni->pni_eq_h);
-#else
- /* liblustre calls the master callback when it removes events from the
- * event queue. The event queue has to be big enough not to drop
- * anything */
-# if CRAY_PORTALS
- /* cray portals implements a non-standard callback to notify us there
- * are buffered events even when the app is not doing a filesystem
- * call. */
- rc = PtlEQAlloc(pni->pni_ni_h, 10240, cray_portals_callback,
- &pni->pni_eq_h);
-# else
- rc = PtlEQAlloc(pni->pni_ni_h, 10240, PTL_EQ_HANDLER_NONE,
- &pni->pni_eq_h);
-# endif
+static void ptlrpc_master_callback(struct lnet_event *ev)
+{
+ struct ptlrpc_cb_id *cbid = ev->md_user_ptr;
+ void (*callback)(struct lnet_event *ev) = cbid->cbid_fn;
+
+ /* Honestly, it's best to find out early. */
+ LASSERT(cbid->cbid_arg != LP_POISON);
+ LASSERT(callback == request_out_callback ||
+ callback == reply_in_callback ||
+ callback == client_bulk_callback ||
+ callback == request_in_callback ||
+ callback == reply_out_callback
+#ifdef HAVE_SERVER_SUPPORT
+ || callback == server_bulk_callback
#endif
- if (rc != PTL_OK)
- GOTO (fail, rc = -ENOMEM);
-
- return (0);
- fail:
- CERROR ("Failed to initialise network interface %s: %d\n",
- name, rc);
+ );
- /* OK to do complete teardown since we invalidated the handles above */
- ptlrpc_ni_fini (pni);
- return (rc);
+ callback(ev);
+ if (ev->unlinked)
+ percpu_ref_put(&ptlrpc_pending);
}
-#ifndef __KERNEL__
-LIST_HEAD(liblustre_wait_callbacks);
-void *liblustre_services_callback;
-
-void *
-liblustre_register_wait_callback (int (*fn)(void *arg), void *arg)
+int ptlrpc_uuid_to_peer(struct obd_uuid *uuid,
+ struct lnet_process_id *peer, lnet_nid_t *self)
{
- struct liblustre_wait_callback *llwc;
-
- OBD_ALLOC(llwc, sizeof(*llwc));
- LASSERT (llwc != NULL);
-
- llwc->llwc_fn = fn;
- llwc->llwc_arg = arg;
- list_add_tail(&llwc->llwc_list, &liblustre_wait_callbacks);
-
- return (llwc);
+ int best_dist = 0;
+ __u32 best_order = 0;
+ int count = 0;
+ int rc = -ENOENT;
+ int dist;
+ __u32 order;
+ lnet_nid_t dst_nid;
+ lnet_nid_t src_nid;
+
+ peer->pid = LNET_PID_LUSTRE;
+
+ /* Choose the matching UUID that's closest */
+ while (lustre_uuid_to_peer(uuid->uuid, &dst_nid, count++) == 0) {
+ if (peer->nid != LNET_NID_ANY && LNET_NIDADDR(peer->nid) == 0 &&
+ LNET_NIDNET(dst_nid) != LNET_NIDNET(peer->nid))
+ continue;
+
+ dist = LNetDist(dst_nid, &src_nid, &order);
+ if (dist < 0)
+ continue;
+
+ if (dist == 0) { /* local! use loopback LND */
+ peer->nid = *self = LNET_NID_LO_0;
+ rc = 0;
+ break;
+ }
+
+ if (rc < 0 ||
+ dist < best_dist ||
+ (dist == best_dist && order < best_order)) {
+ best_dist = dist;
+ best_order = order;
+
+ peer->nid = dst_nid;
+ *self = src_nid;
+ rc = 0;
+ }
+ }
+
+ CDEBUG(D_NET, "%s->%s\n", uuid->uuid, libcfs_id2str(*peer));
+ return rc;
}
-void
-liblustre_deregister_wait_callback (void *opaque)
-{
- struct liblustre_wait_callback *llwc = opaque;
-
- list_del(&llwc->llwc_list);
- OBD_FREE(llwc, sizeof(*llwc));
-}
+static struct completion ptlrpc_done;
-int
-liblustre_check_events (int timeout)
+static void ptlrpc_release(struct percpu_ref *ref)
{
- ptl_event_t ev;
- int rc;
- int i;
- ENTRY;
-
- rc = PtlEQPoll(&ptlrpc_interfaces[0].pni_eq_h, 1, timeout * 1000,
- &ev, &i);
- if (rc == PTL_EQ_EMPTY)
- RETURN(0);
-
- LASSERT (rc == PTL_EQ_DROPPED || rc == PTL_OK);
-
- /* liblustre: no asynch callback so we can't affort to miss any
- * events... */
- if (rc == PTL_EQ_DROPPED) {
- CERROR ("Dropped an event!!!\n");
- abort();
- }
-
- ptlrpc_master_callback (&ev);
- RETURN(1);
+ complete(&ptlrpc_done);
}
-int liblustre_waiting = 0;
-
-int
-liblustre_wait_event (int timeout)
+static void ptlrpc_ni_fini(void)
{
- struct list_head *tmp;
- struct liblustre_wait_callback *llwc;
- int found_something = 0;
-
- /* single threaded recursion check... */
- liblustre_waiting = 1;
-
- for (;;) {
- /* Deal with all pending events */
- while (liblustre_check_events(0))
- found_something = 1;
-
- /* Give all registered callbacks a bite at the cherry */
- list_for_each(tmp, &liblustre_wait_callbacks) {
- llwc = list_entry(tmp, struct liblustre_wait_callback,
- llwc_list);
-
- if (llwc->llwc_fn(llwc->llwc_arg))
- found_something = 1;
- }
-
- if (found_something || timeout == 0)
- break;
-
- /* Nothing so far, but I'm allowed to block... */
- found_something = liblustre_check_events(timeout);
- if (!found_something) /* still nothing */
- break; /* I timed out */
- }
+ /* Wait for the event queue to become idle since there may still be
+ * messages in flight with pending events (i.e. the fire-and-forget
+ * messages == client requests and "non-difficult" server
+ * replies */
- liblustre_waiting = 0;
+ init_completion(&ptlrpc_done);
+ percpu_ref_kill(&ptlrpc_pending);
+ wait_for_completion(&ptlrpc_done);
- return found_something;
+ lnet_assert_handler_unused(ptlrpc_handler);
+ LNetNIFini();
}
-#ifdef CRAY_PORTALS
-static void cray_portals_callback(ptl_event_t *ev)
+lnet_pid_t ptl_get_pid(void)
{
- /* We get a callback from the client Cray portals implementation
- * whenever anyone calls PtlEQPoll(), and an event queue with a
- * callback handler has outstanding events.
- *
- * If it's not liblustre calling PtlEQPoll(), this lets us know we
- * have outstanding events which we handle with
- * liblustre_wait_event().
- *
- * Otherwise, we're already eagerly consuming events and we'd
- * handle events out of order if we recursed. */
- if (!liblustre_waiting)
- liblustre_wait_event(0);
+ return LNET_PID_LUSTRE;
}
-#endif
-#endif /* __KERNEL__ */
-int ptlrpc_default_nal(void)
+int ptlrpc_ni_init(void)
{
- if (ptlrpc_ninterfaces == 0)
- return (-ENOENT);
-
- return (ptlrpc_interfaces[0].pni_number);
+ int rc;
+ lnet_pid_t pid;
+
+ pid = ptl_get_pid();
+ CDEBUG(D_NET, "My pid is: %x\n", pid);
+
+ /* We're not passing any limits yet... */
+ rc = LNetNIInit(pid);
+ if (rc < 0) {
+ CDEBUG(D_NET, "ptlrpc: Can't init network interface: rc = %d\n",
+ rc);
+ return rc;
+ }
+
+ rc = percpu_ref_init(&ptlrpc_pending, ptlrpc_release, 0, GFP_KERNEL);
+ if (rc) {
+ CERROR("ptlrpc: Can't init percpu refcount: rc = %d\n", rc);
+ return rc;
+ }
+ /* CAVEAT EMPTOR: how we process portals events is _radically_
+ * different depending on...
+ */
+ /* kernel LNet calls our master callback when there are new event,
+ * because we are guaranteed to get every event via callback,
+ * so we just set EQ size to 0 to avoid overhread of serializing
+ * enqueue/dequeue operations in LNet. */
+ ptlrpc_handler = ptlrpc_master_callback;
+ return 0;
}
int ptlrpc_init_portals(void)
{
- /* Add new portals network interfaces here.
- * Order is irrelevent! */
- static struct {
- int number;
- char *name;
- } ptl_nis[] = {
-#ifndef CRAY_PORTALS
- {QSWNAL, "qswnal"},
- {SOCKNAL, "socknal"},
- {GMNAL, "gmnal"},
- {OPENIBNAL, "openibnal"},
- {IIBNAL, "iibnal"},
- {TCPNAL, "tcpnal"},
- {LONAL, "lonal"},
-#else
- {CRAY_KB_ERNAL, "cray_kb_ernal"},
-#endif
- };
- int rc;
- int i;
-
- LASSERT(ptlrpc_ninterfaces == 0);
-
- for (i = 0; i < sizeof (ptl_nis) / sizeof (ptl_nis[0]); i++) {
- LASSERT(ptlrpc_ninterfaces < (sizeof(ptlrpc_interfaces) /
- sizeof(ptlrpc_interfaces[0])));
+ int rc = ptlrpc_ni_init();
- rc = ptlrpc_ni_init(ptl_nis[i].number, ptl_nis[i].name,
- &ptlrpc_interfaces[ptlrpc_ninterfaces]);
- if (rc == 0)
- ptlrpc_ninterfaces++;
+ if (rc != 0) {
+ CERROR("network initialisation failed\n");
+ return rc;
}
+ rc = ptlrpcd_addref();
+ if (rc == 0)
+ return 0;
- if (ptlrpc_ninterfaces == 0) {
- CERROR("network initialisation failed: is a NAL module "
- "loaded?\n");
- return -EIO;
- }
-#ifndef __KERNEL__
- liblustre_services_callback =
- liblustre_register_wait_callback(&liblustre_check_services, NULL);
-#endif
- return 0;
+ CERROR("rpcd initialisation failed\n");
+ ptlrpc_ni_fini();
+ return rc;
}
void ptlrpc_exit_portals(void)
{
-#ifndef __KERNEL__
- liblustre_deregister_wait_callback(liblustre_services_callback);
-#endif
- while (ptlrpc_ninterfaces > 0)
- ptlrpc_ni_fini (&ptlrpc_interfaces[--ptlrpc_ninterfaces]);
+ ptlrpcd_decref();
+ ptlrpc_ni_fini();
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff