lnet/selftest/rpc.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30 /*
  31  * This file is part of Lustre, http://www.lustre.org/
  32  * Lustre is a trademark of Sun Microsystems, Inc.
  33  *
  34  * lnet/selftest/rpc.c
  35  *
  36  * Author: Isaac Huang <isaac@clusterfs.com>
  37  */
  38
  39 #define DEBUG_SUBSYSTEM S_LNET
  40
  41 #include "selftest.h"
  42
  43
  44 typedef enum {
  45         SRPC_STATE_NONE,
  46         SRPC_STATE_NI_INIT,
  47         SRPC_STATE_EQ_INIT,
  48         SRPC_STATE_RUNNING,
  49         SRPC_STATE_STOPPING,
  50 } srpc_state_t;
  51
  52 struct smoketest_rpc {
  53         cfs_spinlock_t    rpc_glock;     /* global lock */
  54         srpc_service_t   *rpc_services[SRPC_SERVICE_MAX_ID + 1];
  55         lnet_handle_eq_t  rpc_lnet_eq;   /* _the_ LNet event queue */
  56         srpc_state_t      rpc_state;
  57         srpc_counters_t   rpc_counters;
  58         __u64             rpc_matchbits; /* matchbits counter */
  59 } srpc_data;
  60
  61 /* forward ref's */
  62 int srpc_handle_rpc (swi_workitem_t *wi);
  63
  64 void srpc_get_counters (srpc_counters_t *cnt)
  65 {
  66         cfs_spin_lock(&srpc_data.rpc_glock);
  67         *cnt = srpc_data.rpc_counters;
  68         cfs_spin_unlock(&srpc_data.rpc_glock);
  69 }
  70
  71 void srpc_set_counters (const srpc_counters_t *cnt)
  72 {
  73         cfs_spin_lock(&srpc_data.rpc_glock);
  74         srpc_data.rpc_counters = *cnt;
  75         cfs_spin_unlock(&srpc_data.rpc_glock);
  76 }
  77
  78 void
  79 srpc_add_bulk_page (srpc_bulk_t *bk, cfs_page_t *pg, int i)
  80 {
  81         LASSERT (i >= 0 && i < bk->bk_niov);
  82
  83 #ifdef __KERNEL__
  84         bk->bk_iovs[i].kiov_offset = 0;
  85         bk->bk_iovs[i].kiov_page   = pg;
  86         bk->bk_iovs[i].kiov_len    = CFS_PAGE_SIZE;
  87 #else
  88         LASSERT (bk->bk_pages != NULL);
  89
  90         bk->bk_pages[i] = pg;
  91         bk->bk_iovs[i].iov_len  = CFS_PAGE_SIZE;
  92         bk->bk_iovs[i].iov_base = cfs_page_address(pg);
  93 #endif
  94         return;
  95 }
  96
  97 void
  98 srpc_free_bulk (srpc_bulk_t *bk)
  99 {
 100         int         i;
 101         cfs_page_t *pg;
 102
 103         LASSERT (bk != NULL);
 104 #ifndef __KERNEL__
 105         LASSERT (bk->bk_pages != NULL);
 106 #endif
 107
 108         for (i = 0; i < bk->bk_niov; i++) {
 109 #ifdef __KERNEL__
 110                 pg = bk->bk_iovs[i].kiov_page;
 111 #else
 112                 pg = bk->bk_pages[i];
 113 #endif
 114                 if (pg == NULL) break;
 115
 116                 cfs_free_page(pg);
 117         }
 118
 119 #ifndef __KERNEL__
 120         LIBCFS_FREE(bk->bk_pages, sizeof(cfs_page_t *) * bk->bk_niov);
 121 #endif
 122         LIBCFS_FREE(bk, offsetof(srpc_bulk_t, bk_iovs[bk->bk_niov]));
 123         return;
 124 }
 125
 126 srpc_bulk_t *
 127 srpc_alloc_bulk (int npages, int sink)
 128 {
 129         srpc_bulk_t  *bk;
 130         cfs_page_t  **pages;
 131         int           i;
 132
 133         LASSERT (npages > 0 && npages <= LNET_MAX_IOV);
 134
 135         LIBCFS_ALLOC(bk, offsetof(srpc_bulk_t, bk_iovs[npages]));
 136         if (bk == NULL) {
 137                 CERROR ("Can't allocate descriptor for %d pages\n", npages);
 138                 return NULL;
 139         }
 140
 141         memset(bk, 0, offsetof(srpc_bulk_t, bk_iovs[npages]));
 142         bk->bk_sink = sink;
 143         bk->bk_niov = npages;
 144         bk->bk_len  = npages * CFS_PAGE_SIZE;
 145 #ifndef __KERNEL__
 146         LIBCFS_ALLOC(pages, sizeof(cfs_page_t *) * npages);
 147         if (pages == NULL) {
 148                 LIBCFS_FREE(bk, offsetof(srpc_bulk_t, bk_iovs[npages]));
 149                 CERROR ("Can't allocate page array for %d pages\n", npages);
 150                 return NULL;
 151         }
 152
 153         memset(pages, 0, sizeof(cfs_page_t *) * npages);
 154         bk->bk_pages = pages;
 155 #else
 156         UNUSED (pages);
 157 #endif
 158
 159         for (i = 0; i < npages; i++) {
 160                 cfs_page_t *pg = cfs_alloc_page(CFS_ALLOC_STD);
 161
 162                 if (pg == NULL) {
 163                         CERROR ("Can't allocate page %d of %d\n", i, npages);
 164                         srpc_free_bulk(bk);
 165                         return NULL;
 166                 }
 167
 168                 srpc_add_bulk_page(bk, pg, i);
 169         }
 170
 171         return bk;
 172 }
 173
 174 static inline __u64
 175 srpc_next_id (void)
 176 {
 177         __u64 id;
 178
 179         cfs_spin_lock(&srpc_data.rpc_glock);
 180         id = srpc_data.rpc_matchbits++;
 181         cfs_spin_unlock(&srpc_data.rpc_glock);
 182         return id;
 183 }
 184
 185 void
 186 srpc_init_server_rpc (srpc_server_rpc_t *rpc,
 187                       srpc_service_t *sv, srpc_buffer_t *buffer)
 188 {
 189         memset(rpc, 0, sizeof(*rpc));
 190         swi_init_workitem(&rpc->srpc_wi, rpc, srpc_handle_rpc,
 191                           sv->sv_id <= SRPC_FRAMEWORK_SERVICE_MAX_ID ?
 192                           CFS_WI_SCHED_SERIAL : CFS_WI_SCHED_ANY);
 193
 194         rpc->srpc_ev.ev_fired = 1; /* no event expected now */
 195
 196         rpc->srpc_service  = sv;
 197         rpc->srpc_reqstbuf = buffer;
 198         rpc->srpc_peer     = buffer->buf_peer;
 199         rpc->srpc_self     = buffer->buf_self;
 200         LNetInvalidateHandle(&rpc->srpc_replymdh);
 201 }
 202
 203 int
 204 srpc_add_service (srpc_service_t *sv)
 205 {
 206         int                id = sv->sv_id;
 207         int                i;
 208         srpc_server_rpc_t *rpc;
 209
 210         LASSERT (sv->sv_concur > 0);
 211         LASSERT (0 <= id && id <= SRPC_SERVICE_MAX_ID);
 212
 213         cfs_spin_lock(&srpc_data.rpc_glock);
 214
 215         LASSERT (srpc_data.rpc_state == SRPC_STATE_RUNNING);
 216
 217         if (srpc_data.rpc_services[id] != NULL) {
 218                 cfs_spin_unlock(&srpc_data.rpc_glock);
 219                 return -EBUSY;
 220         }
 221
 222         srpc_data.rpc_services[id] = sv;
 223         cfs_spin_unlock(&srpc_data.rpc_glock);
 224
 225         sv->sv_nprune       = 0;
 226         sv->sv_nposted_msg  = 0;
 227         sv->sv_shuttingdown = 0;
 228         cfs_spin_lock_init(&sv->sv_lock);
 229         CFS_INIT_LIST_HEAD(&sv->sv_free_rpcq);
 230         CFS_INIT_LIST_HEAD(&sv->sv_active_rpcq);
 231         CFS_INIT_LIST_HEAD(&sv->sv_posted_msgq);
 232         CFS_INIT_LIST_HEAD(&sv->sv_blocked_msgq);
 233
 234         sv->sv_ev.ev_data = sv;
 235         sv->sv_ev.ev_type = SRPC_REQUEST_RCVD;
 236
 237         for (i = 0; i < sv->sv_concur; i++) {
 238                 LIBCFS_ALLOC(rpc, sizeof(*rpc));
 239                 if (rpc == NULL) goto enomem;
 240
 241                 cfs_list_add(&rpc->srpc_list, &sv->sv_free_rpcq);
 242         }
 243
 244         CDEBUG (D_NET, "Adding service: id %d, name %s, concurrency %d\n",
 245                 id, sv->sv_name, sv->sv_concur);
 246         return 0;
 247
 248 enomem:
 249         while (!cfs_list_empty(&sv->sv_free_rpcq)) {
 250                 rpc = cfs_list_entry(sv->sv_free_rpcq.next,
 251                                      srpc_server_rpc_t, srpc_list);
 252                 cfs_list_del(&rpc->srpc_list);
 253                 LIBCFS_FREE(rpc, sizeof(*rpc));
 254         }
 255
 256         cfs_spin_lock(&srpc_data.rpc_glock);
 257         srpc_data.rpc_services[id] = NULL;
 258         cfs_spin_unlock(&srpc_data.rpc_glock);
 259         return -ENOMEM;
 260 }
 261
 262 int
 263 srpc_remove_service (srpc_service_t *sv)
 264 {
 265         int id = sv->sv_id;
 266
 267         cfs_spin_lock(&srpc_data.rpc_glock);
 268
 269         if (srpc_data.rpc_services[id] != sv) {
 270                 cfs_spin_unlock(&srpc_data.rpc_glock);
 271                 return -ENOENT;
 272         }
 273
 274         srpc_data.rpc_services[id] = NULL;
 275         cfs_spin_unlock(&srpc_data.rpc_glock);
 276         return 0;
 277 }
 278
 279 int
 280 srpc_post_passive_rdma(int portal, __u64 matchbits, void *buf,
 281                        int len, int options, lnet_process_id_t peer,
 282                        lnet_handle_md_t *mdh, srpc_event_t *ev)
 283 {
 284         int              rc;
 285         lnet_md_t        md;
 286         lnet_handle_me_t meh;
 287
 288         rc = LNetMEAttach(portal, peer, matchbits, 0,
 289                           LNET_UNLINK, LNET_INS_AFTER, &meh);
 290         if (rc != 0) {
 291                 CERROR ("LNetMEAttach failed: %d\n", rc);
 292                 LASSERT (rc == -ENOMEM);
 293                 return -ENOMEM;
 294         }
 295
 296         md.threshold = 1;
 297         md.user_ptr  = ev;
 298         md.start     = buf;
 299         md.length    = len;
 300         md.options   = options;
 301         md.eq_handle = srpc_data.rpc_lnet_eq;
 302
 303         rc = LNetMDAttach(meh, md, LNET_UNLINK, mdh);
 304         if (rc != 0) {
 305                 CERROR ("LNetMDAttach failed: %d\n", rc);
 306                 LASSERT (rc == -ENOMEM);
 307
 308                 rc = LNetMEUnlink(meh);
 309                 LASSERT (rc == 0);
 310                 return -ENOMEM;
 311         }
 312
 313         CDEBUG (D_NET,
 314                 "Posted passive RDMA: peer %s, portal %d, matchbits "LPX64"\n",
 315                 libcfs_id2str(peer), portal, matchbits);
 316         return 0;
 317 }
 318
 319 int
 320 srpc_post_active_rdma(int portal, __u64 matchbits, void *buf, int len,
 321                       int options, lnet_process_id_t peer, lnet_nid_t self,
 322                       lnet_handle_md_t *mdh, srpc_event_t *ev)
 323 {
 324         int       rc;
 325         lnet_md_t md;
 326
 327         md.user_ptr  = ev;
 328         md.start     = buf;
 329         md.length    = len;
 330         md.eq_handle = srpc_data.rpc_lnet_eq;
 331         md.threshold = ((options & LNET_MD_OP_GET) != 0) ? 2 : 1;
 332         md.options   = options & ~(LNET_MD_OP_PUT | LNET_MD_OP_GET);
 333
 334         rc = LNetMDBind(md, LNET_UNLINK, mdh);
 335         if (rc != 0) {
 336                 CERROR ("LNetMDBind failed: %d\n", rc);
 337                 LASSERT (rc == -ENOMEM);
 338                 return -ENOMEM;
 339         }
 340
 341         /* this is kind of an abuse of the LNET_MD_OP_{PUT,GET} options.
 342          * they're only meaningful for MDs attached to an ME (i.e. passive
 343          * buffers... */
 344         if ((options & LNET_MD_OP_PUT) != 0) {
 345                 rc = LNetPut(self, *mdh, LNET_NOACK_REQ, peer,
 346                              portal, matchbits, 0, 0);
 347         } else {
 348                 LASSERT ((options & LNET_MD_OP_GET) != 0);
 349
 350                 rc = LNetGet(self, *mdh, peer, portal, matchbits, 0);
 351         }
 352
 353         if (rc != 0) {
 354                 CERROR ("LNet%s(%s, %d, "LPD64") failed: %d\n",
 355                         ((options & LNET_MD_OP_PUT) != 0) ? "Put" : "Get",
 356                         libcfs_id2str(peer), portal, matchbits, rc);
 357
 358                 /* The forthcoming unlink event will complete this operation
 359                  * with failure, so fall through and return success here.
 360                  */
 361                 rc = LNetMDUnlink(*mdh);
 362                 LASSERT (rc == 0);
 363         } else {
 364                 CDEBUG (D_NET,
 365                         "Posted active RDMA: peer %s, portal %u, matchbits "LPX64"\n",
 366                         libcfs_id2str(peer), portal, matchbits);
 367         }
 368         return 0;
 369 }
 370
 371 int
 372 srpc_post_active_rqtbuf(lnet_process_id_t peer, int service, void *buf,
 373                         int len, lnet_handle_md_t *mdh, srpc_event_t *ev)
 374 {
 375         int rc;
 376         int portal;
 377
 378         if (service > SRPC_FRAMEWORK_SERVICE_MAX_ID)
 379                 portal = SRPC_REQUEST_PORTAL;
 380         else
 381                 portal = SRPC_FRAMEWORK_REQUEST_PORTAL;
 382
 383         rc = srpc_post_active_rdma(portal, service, buf, len,
 384                                    LNET_MD_OP_PUT, peer,
 385                                    LNET_NID_ANY, mdh, ev);
 386         return rc;
 387 }
 388
 389 int
 390 srpc_post_passive_rqtbuf(int service, void *buf, int len,
 391                          lnet_handle_md_t *mdh, srpc_event_t *ev)
 392 {
 393         int               rc;
 394         int               portal;
 395         lnet_process_id_t any = {0};
 396
 397         any.nid = LNET_NID_ANY;
 398         any.pid = LNET_PID_ANY;
 399
 400         if (service > SRPC_FRAMEWORK_SERVICE_MAX_ID)
 401                 portal = SRPC_REQUEST_PORTAL;
 402         else
 403                 portal = SRPC_FRAMEWORK_REQUEST_PORTAL;
 404
 405         rc = srpc_post_passive_rdma(portal, service, buf, len,
 406                                     LNET_MD_OP_PUT, any, mdh, ev);
 407         return rc;
 408 }
 409
 410 int
 411 srpc_service_post_buffer (srpc_service_t *sv, srpc_buffer_t *buf)
 412 {
 413         srpc_msg_t *msg = &buf->buf_msg;
 414         int         rc;
 415
 416         LASSERT (!sv->sv_shuttingdown);
 417
 418         LNetInvalidateHandle(&buf->buf_mdh);
 419         cfs_list_add(&buf->buf_list, &sv->sv_posted_msgq);
 420         sv->sv_nposted_msg++;
 421         cfs_spin_unlock(&sv->sv_lock);
 422
 423         rc = srpc_post_passive_rqtbuf(sv->sv_id, msg, sizeof(*msg),
 424                                       &buf->buf_mdh, &sv->sv_ev);
 425
 426         /* At this point, a RPC (new or delayed) may have arrived in
 427          * msg and its event handler has been called. So we must add
 428          * buf to sv_posted_msgq _before_ dropping sv_lock */
 429
 430         cfs_spin_lock(&sv->sv_lock);
 431
 432         if (rc == 0) {
 433                 if (sv->sv_shuttingdown) {
 434                         cfs_spin_unlock(&sv->sv_lock);
 435
 436                         /* srpc_shutdown_service might have tried to unlink me
 437                          * when my buf_mdh was still invalid */
 438                         LNetMDUnlink(buf->buf_mdh);
 439
 440                         cfs_spin_lock(&sv->sv_lock);
 441                 }
 442                 return 0;
 443         }
 444
 445         sv->sv_nposted_msg--;
 446         if (sv->sv_shuttingdown) return rc;
 447
 448         cfs_list_del(&buf->buf_list);
 449
 450         cfs_spin_unlock(&sv->sv_lock);
 451         LIBCFS_FREE(buf, sizeof(*buf));
 452         cfs_spin_lock(&sv->sv_lock);
 453         return rc;
 454 }
 455
 456 int
 457 srpc_service_add_buffers (srpc_service_t *sv, int nbuffer)
 458 {
 459         int                rc;
 460         int                posted;
 461         srpc_buffer_t     *buf;
 462
 463         LASSERTF (nbuffer > 0,
 464                   "nbuffer must be positive: %d\n", nbuffer);
 465
 466         for (posted = 0; posted < nbuffer; posted++) {
 467                 LIBCFS_ALLOC(buf, sizeof(*buf));
 468                 if (buf == NULL) break;
 469
 470                 cfs_spin_lock(&sv->sv_lock);
 471                 rc = srpc_service_post_buffer(sv, buf);
 472                 cfs_spin_unlock(&sv->sv_lock);
 473
 474                 if (rc != 0) break;
 475         }
 476
 477         return posted;
 478 }
 479
 480 void
 481 srpc_service_remove_buffers (srpc_service_t *sv, int nbuffer)
 482 {
 483         LASSERTF (nbuffer > 0,
 484                   "nbuffer must be positive: %d\n", nbuffer);
 485
 486         cfs_spin_lock(&sv->sv_lock);
 487
 488         LASSERT (sv->sv_nprune >= 0);
 489         LASSERT (!sv->sv_shuttingdown);
 490
 491         sv->sv_nprune += nbuffer;
 492
 493         cfs_spin_unlock(&sv->sv_lock);
 494         return;
 495 }
 496
 497 /* returns 1 if sv has finished, otherwise 0 */
 498 int
 499 srpc_finish_service (srpc_service_t *sv)
 500 {
 501         srpc_server_rpc_t *rpc;
 502         srpc_buffer_t     *buf;
 503
 504         cfs_spin_lock(&sv->sv_lock);
 505
 506         LASSERT (sv->sv_shuttingdown); /* srpc_shutdown_service called */
 507
 508         if (sv->sv_nposted_msg != 0 || !cfs_list_empty(&sv->sv_active_rpcq)) {
 509                 CDEBUG (D_NET,
 510                         "waiting for %d posted buffers to unlink and "
 511                         "in-flight RPCs to die.\n",
 512                         sv->sv_nposted_msg);
 513
 514                 if (!cfs_list_empty(&sv->sv_active_rpcq)) {
 515                         rpc = cfs_list_entry(sv->sv_active_rpcq.next,
 516                                              srpc_server_rpc_t, srpc_list);
 517                         CNETERR("Active RPC %p on shutdown: sv %s, peer %s, "
 518                                 "wi %s scheduled %d running %d, "
 519                                 "ev fired %d type %d status %d lnet %d\n",
 520                                 rpc, sv->sv_name, libcfs_id2str(rpc->srpc_peer),
 521                                 swi_state2str(rpc->srpc_wi.swi_state),
 522                                 rpc->srpc_wi.swi_workitem.wi_scheduled,
 523                                 rpc->srpc_wi.swi_workitem.wi_running,
 524                                 rpc->srpc_ev.ev_fired,
 525                                 rpc->srpc_ev.ev_type,
 526                                 rpc->srpc_ev.ev_status,
 527                                 rpc->srpc_ev.ev_lnet);
 528                 }
 529
 530                 cfs_spin_unlock(&sv->sv_lock);
 531                 return 0;
 532         }
 533
 534         cfs_spin_unlock(&sv->sv_lock); /* no lock needed from now on */
 535
 536         for (;;) {
 537                 cfs_list_t *q;
 538
 539                 if (!cfs_list_empty(&sv->sv_posted_msgq))
 540                         q = &sv->sv_posted_msgq;
 541                 else if (!cfs_list_empty(&sv->sv_blocked_msgq))
 542                         q = &sv->sv_blocked_msgq;
 543                 else
 544                         break;
 545
 546                 buf = cfs_list_entry(q->next, srpc_buffer_t, buf_list);
 547                 cfs_list_del(&buf->buf_list);
 548
 549                 LIBCFS_FREE(buf, sizeof(*buf));
 550         }
 551
 552         while (!cfs_list_empty(&sv->sv_free_rpcq)) {
 553                 rpc = cfs_list_entry(sv->sv_free_rpcq.next,
 554                                      srpc_server_rpc_t, srpc_list);
 555                 cfs_list_del(&rpc->srpc_list);
 556                 LIBCFS_FREE(rpc, sizeof(*rpc));
 557         }
 558
 559         return 1;
 560 }
 561
 562 /* called with sv->sv_lock held */
 563 void
 564 srpc_service_recycle_buffer (srpc_service_t *sv, srpc_buffer_t *buf)
 565 {
 566         if (sv->sv_shuttingdown) goto free;
 567
 568         if (sv->sv_nprune == 0) {
 569                 if (srpc_service_post_buffer(sv, buf) != 0)
 570                         CWARN ("Failed to post %s buffer\n", sv->sv_name);
 571                 return;
 572         }
 573
 574         sv->sv_nprune--;
 575 free:
 576         cfs_spin_unlock(&sv->sv_lock);
 577         LIBCFS_FREE(buf, sizeof(*buf));
 578         cfs_spin_lock(&sv->sv_lock);
 579 }
 580
 581 /* called with srpc_service_t::sv_lock held */
 582 inline void
 583 srpc_schedule_server_rpc (srpc_server_rpc_t *rpc)
 584 {
 585         swi_schedule_workitem(&rpc->srpc_wi);
 586 }
 587
 588 void
 589 srpc_abort_service (srpc_service_t *sv)
 590 {
 591         srpc_server_rpc_t *rpc;
 592
 593         cfs_spin_lock(&sv->sv_lock);
 594
 595         CDEBUG(D_NET, "Aborting service: id %d, name %s\n",
 596                sv->sv_id, sv->sv_name);
 597
 598         /* schedule in-flight RPCs to notice the abort, NB:
 599          * racing with incoming RPCs; complete fix should make test
 600          * RPCs carry session ID in its headers */
 601         cfs_list_for_each_entry (rpc, &sv->sv_active_rpcq, srpc_list) {
 602                 rpc->srpc_aborted = 1;
 603                 srpc_schedule_server_rpc(rpc);
 604         }
 605
 606         cfs_spin_unlock(&sv->sv_lock);
 607         return;
 608 }
 609
 610 void
 611 srpc_shutdown_service (srpc_service_t *sv)
 612 {
 613         srpc_server_rpc_t *rpc;
 614         srpc_buffer_t     *buf;
 615
 616         cfs_spin_lock(&sv->sv_lock);
 617
 618         CDEBUG(D_NET, "Shutting down service: id %d, name %s\n",
 619                sv->sv_id, sv->sv_name);
 620
 621         sv->sv_shuttingdown = 1; /* i.e. no new active RPC */
 622
 623         /* schedule in-flight RPCs to notice the shutdown */
 624         cfs_list_for_each_entry_typed (rpc, &sv->sv_active_rpcq,
 625                                        srpc_server_rpc_t, srpc_list) {
 626                 srpc_schedule_server_rpc(rpc);
 627         }
 628
 629         cfs_spin_unlock(&sv->sv_lock);
 630
 631         /* OK to traverse sv_posted_msgq without lock, since no one
 632          * touches sv_posted_msgq now */
 633         cfs_list_for_each_entry_typed (buf, &sv->sv_posted_msgq,
 634                                        srpc_buffer_t, buf_list)
 635                 LNetMDUnlink(buf->buf_mdh);
 636
 637         return;
 638 }
 639
 640 int
 641 srpc_send_request (srpc_client_rpc_t *rpc)
 642 {
 643         srpc_event_t *ev = &rpc->crpc_reqstev;
 644         int           rc;
 645
 646         ev->ev_fired = 0;
 647         ev->ev_data  = rpc;
 648         ev->ev_type  = SRPC_REQUEST_SENT;
 649
 650         rc = srpc_post_active_rqtbuf(rpc->crpc_dest, rpc->crpc_service,
 651                                      &rpc->crpc_reqstmsg, sizeof(srpc_msg_t),
 652                                      &rpc->crpc_reqstmdh, ev);
 653         if (rc != 0) {
 654                 LASSERT (rc == -ENOMEM);
 655                 ev->ev_fired = 1;  /* no more event expected */
 656         }
 657         return rc;
 658 }
 659
 660 int
 661 srpc_prepare_reply (srpc_client_rpc_t *rpc)
 662 {
 663         srpc_event_t *ev = &rpc->crpc_replyev;
 664         __u64        *id = &rpc->crpc_reqstmsg.msg_body.reqst.rpyid;
 665         int           rc;
 666
 667         ev->ev_fired = 0;
 668         ev->ev_data  = rpc;
 669         ev->ev_type  = SRPC_REPLY_RCVD;
 670
 671         *id = srpc_next_id();
 672
 673         rc = srpc_post_passive_rdma(SRPC_RDMA_PORTAL, *id,
 674                                     &rpc->crpc_replymsg, sizeof(srpc_msg_t),
 675                                     LNET_MD_OP_PUT, rpc->crpc_dest,
 676                                     &rpc->crpc_replymdh, ev);
 677         if (rc != 0) {
 678                 LASSERT (rc == -ENOMEM);
 679                 ev->ev_fired = 1;  /* no more event expected */
 680         }
 681         return rc;
 682 }
 683
 684 int
 685 srpc_prepare_bulk (srpc_client_rpc_t *rpc)
 686 {
 687         srpc_bulk_t  *bk = &rpc->crpc_bulk;
 688         srpc_event_t *ev = &rpc->crpc_bulkev;
 689         __u64        *id = &rpc->crpc_reqstmsg.msg_body.reqst.bulkid;
 690         int           rc;
 691         int           opt;
 692
 693         LASSERT (bk->bk_niov <= LNET_MAX_IOV);
 694
 695         if (bk->bk_niov == 0) return 0; /* nothing to do */
 696
 697         opt = bk->bk_sink ? LNET_MD_OP_PUT : LNET_MD_OP_GET;
 698 #ifdef __KERNEL__
 699         opt |= LNET_MD_KIOV;
 700 #else
 701         opt |= LNET_MD_IOVEC;
 702 #endif
 703
 704         ev->ev_fired = 0;
 705         ev->ev_data  = rpc;
 706         ev->ev_type  = SRPC_BULK_REQ_RCVD;
 707
 708         *id = srpc_next_id();
 709
 710         rc = srpc_post_passive_rdma(SRPC_RDMA_PORTAL, *id,
 711                                     &bk->bk_iovs[0], bk->bk_niov, opt,
 712                                     rpc->crpc_dest, &bk->bk_mdh, ev);
 713         if (rc != 0) {
 714                 LASSERT (rc == -ENOMEM);
 715                 ev->ev_fired = 1;  /* no more event expected */
 716         }
 717         return rc;
 718 }
 719
 720 int
 721 srpc_do_bulk (srpc_server_rpc_t *rpc)
 722 {
 723         srpc_event_t  *ev = &rpc->srpc_ev;
 724         srpc_bulk_t   *bk = rpc->srpc_bulk;
 725         __u64          id = rpc->srpc_reqstbuf->buf_msg.msg_body.reqst.bulkid;
 726         int            rc;
 727         int            opt;
 728
 729         LASSERT (bk != NULL);
 730
 731         opt = bk->bk_sink ? LNET_MD_OP_GET : LNET_MD_OP_PUT;
 732 #ifdef __KERNEL__
 733         opt |= LNET_MD_KIOV;
 734 #else
 735         opt |= LNET_MD_IOVEC;
 736 #endif
 737
 738         ev->ev_fired = 0;
 739         ev->ev_data  = rpc;
 740         ev->ev_type  = bk->bk_sink ? SRPC_BULK_GET_RPLD : SRPC_BULK_PUT_SENT;
 741
 742         rc = srpc_post_active_rdma(SRPC_RDMA_PORTAL, id,
 743                                    &bk->bk_iovs[0], bk->bk_niov, opt,
 744                                    rpc->srpc_peer, rpc->srpc_self,
 745                                    &bk->bk_mdh, ev);
 746         if (rc != 0)
 747                 ev->ev_fired = 1;  /* no more event expected */
 748         return rc;
 749 }
 750
 751 /* only called from srpc_handle_rpc */
 752 void
 753 srpc_server_rpc_done (srpc_server_rpc_t *rpc, int status)
 754 {
 755         srpc_service_t *sv = rpc->srpc_service;
 756         srpc_buffer_t  *buffer;
 757
 758         LASSERT (status != 0 || rpc->srpc_wi.swi_state == SWI_STATE_DONE);
 759
 760         rpc->srpc_status = status;
 761
 762         CDEBUG_LIMIT (status == 0 ? D_NET : D_NETERROR,
 763                 "Server RPC %p done: service %s, peer %s, status %s:%d\n",
 764                 rpc, sv->sv_name, libcfs_id2str(rpc->srpc_peer),
 765                 swi_state2str(rpc->srpc_wi.swi_state), status);
 766
 767         if (status != 0) {
 768                 cfs_spin_lock(&srpc_data.rpc_glock);
 769                 srpc_data.rpc_counters.rpcs_dropped++;
 770                 cfs_spin_unlock(&srpc_data.rpc_glock);
 771         }
 772
 773         if (rpc->srpc_done != NULL)
 774                 (*rpc->srpc_done) (rpc);
 775         LASSERT (rpc->srpc_bulk == NULL);
 776
 777         cfs_spin_lock(&sv->sv_lock);
 778
 779         if (rpc->srpc_reqstbuf != NULL) {
 780                 /* NB might drop sv_lock in srpc_service_recycle_buffer, but
 781                  * sv won't go away for sv_active_rpcq must not be empty */
 782                 srpc_service_recycle_buffer(sv, rpc->srpc_reqstbuf);
 783                 rpc->srpc_reqstbuf = NULL;
 784         }
 785
 786         cfs_list_del(&rpc->srpc_list); /* from sv->sv_active_rpcq */
 787
 788         /*
 789          * No one can schedule me now since:
 790          * - I'm not on sv_active_rpcq.
 791          * - all LNet events have been fired.
 792          * Cancel pending schedules and prevent future schedule attempts:
 793          */
 794         LASSERT (rpc->srpc_ev.ev_fired);
 795         swi_kill_workitem(&rpc->srpc_wi);
 796
 797         if (!sv->sv_shuttingdown && !cfs_list_empty(&sv->sv_blocked_msgq)) {
 798                 buffer = cfs_list_entry(sv->sv_blocked_msgq.next,
 799                                     srpc_buffer_t, buf_list);
 800                 cfs_list_del(&buffer->buf_list);
 801
 802                 srpc_init_server_rpc(rpc, sv, buffer);
 803                 cfs_list_add_tail(&rpc->srpc_list, &sv->sv_active_rpcq);
 804                 srpc_schedule_server_rpc(rpc);
 805         } else {
 806                 cfs_list_add(&rpc->srpc_list, &sv->sv_free_rpcq);
 807         }
 808
 809         cfs_spin_unlock(&sv->sv_lock);
 810         return;
 811 }
 812
 813 /* handles an incoming RPC */
 814 int
 815 srpc_handle_rpc (swi_workitem_t *wi)
 816 {
 817         srpc_server_rpc_t *rpc = wi->swi_workitem.wi_data;
 818         srpc_service_t    *sv = rpc->srpc_service;
 819         srpc_event_t      *ev = &rpc->srpc_ev;
 820         int                rc = 0;
 821
 822         LASSERT (wi == &rpc->srpc_wi);
 823
 824         cfs_spin_lock(&sv->sv_lock);
 825
 826         if (sv->sv_shuttingdown || rpc->srpc_aborted) {
 827                 cfs_spin_unlock(&sv->sv_lock);
 828
 829                 if (rpc->srpc_bulk != NULL)
 830                         LNetMDUnlink(rpc->srpc_bulk->bk_mdh);
 831                 LNetMDUnlink(rpc->srpc_replymdh);
 832
 833                 if (ev->ev_fired) { /* no more event, OK to finish */
 834                         srpc_server_rpc_done(rpc, -ESHUTDOWN);
 835                         return 1;
 836                 }
 837                 return 0;
 838         }
 839
 840         cfs_spin_unlock(&sv->sv_lock);
 841
 842         switch (wi->swi_state) {
 843         default:
 844                 LBUG ();
 845         case SWI_STATE_NEWBORN: {
 846                 srpc_msg_t           *msg;
 847                 srpc_generic_reply_t *reply;
 848
 849                 msg = &rpc->srpc_reqstbuf->buf_msg;
 850                 reply = &rpc->srpc_replymsg.msg_body.reply;
 851
 852                 if (msg->msg_magic == 0) {
 853                         /* moaned already in srpc_lnet_ev_handler */
 854                         rc = EBADMSG;
 855                 } else if (msg->msg_version != SRPC_MSG_VERSION &&
 856                            msg->msg_version != __swab32(SRPC_MSG_VERSION)) {
 857                         CWARN ("Version mismatch: %u, %u expected, from %s\n",
 858                                msg->msg_version, SRPC_MSG_VERSION,
 859                                libcfs_id2str(rpc->srpc_peer));
 860                         reply->status = EPROTO;
 861                 } else {
 862                         reply->status = 0;
 863                         rc = (*sv->sv_handler) (rpc);
 864                         LASSERT (reply->status == 0 || !rpc->srpc_bulk);
 865                 }
 866
 867                 if (rc != 0) {
 868                         srpc_server_rpc_done(rpc, rc);
 869                         return 1;
 870                 }
 871
 872                 wi->swi_state = SWI_STATE_BULK_STARTED;
 873
 874                 if (rpc->srpc_bulk != NULL) {
 875                         rc = srpc_do_bulk(rpc);
 876                         if (rc == 0)
 877                                 return 0; /* wait for bulk */
 878
 879                         LASSERT (ev->ev_fired);
 880                         ev->ev_status = rc;
 881                 }
 882         }
 883         case SWI_STATE_BULK_STARTED:
 884                 LASSERT (rpc->srpc_bulk == NULL || ev->ev_fired);
 885
 886                 if (rpc->srpc_bulk != NULL) {
 887                         rc = ev->ev_status;
 888
 889                         if (sv->sv_bulk_ready != NULL)
 890                                 rc = (*sv->sv_bulk_ready) (rpc, rc);
 891
 892                         if (rc != 0) {
 893                                 srpc_server_rpc_done(rpc, rc);
 894                                 return 1;
 895                         }
 896                 }
 897
 898                 wi->swi_state = SWI_STATE_REPLY_SUBMITTED;
 899                 rc = srpc_send_reply(rpc);
 900                 if (rc == 0)
 901                         return 0; /* wait for reply */
 902                 srpc_server_rpc_done(rpc, rc);
 903                 return 1;
 904
 905         case SWI_STATE_REPLY_SUBMITTED:
 906                 if (!ev->ev_fired) {
 907                         CERROR("RPC %p: bulk %p, service %d\n",
 908                                rpc, rpc->srpc_bulk, rpc->srpc_service->sv_id);
 909                         CERROR("Event: status %d, type %d, lnet %d\n",
 910                                ev->ev_status, ev->ev_type, ev->ev_lnet);
 911                         LASSERT (ev->ev_fired);
 912                 }
 913
 914                 wi->swi_state = SWI_STATE_DONE;
 915                 srpc_server_rpc_done(rpc, ev->ev_status);
 916                 return 1;
 917         }
 918
 919         return 0;
 920 }
 921
 922 void
 923 srpc_client_rpc_expired (void *data)
 924 {
 925         srpc_client_rpc_t *rpc = data;
 926
 927         CWARN ("Client RPC expired: service %d, peer %s, timeout %d.\n",
 928                rpc->crpc_service, libcfs_id2str(rpc->crpc_dest),
 929                rpc->crpc_timeout);
 930
 931         cfs_spin_lock(&rpc->crpc_lock);
 932
 933         rpc->crpc_timeout = 0;
 934         srpc_abort_rpc(rpc, -ETIMEDOUT);
 935
 936         cfs_spin_unlock(&rpc->crpc_lock);
 937
 938         cfs_spin_lock(&srpc_data.rpc_glock);
 939         srpc_data.rpc_counters.rpcs_expired++;
 940         cfs_spin_unlock(&srpc_data.rpc_glock);
 941         return;
 942 }
 943
 944 inline void
 945 srpc_add_client_rpc_timer (srpc_client_rpc_t *rpc)
 946 {
 947         stt_timer_t *timer = &rpc->crpc_timer;
 948
 949         if (rpc->crpc_timeout == 0) return;
 950
 951         CFS_INIT_LIST_HEAD(&timer->stt_list);
 952         timer->stt_data    = rpc;
 953         timer->stt_func    = srpc_client_rpc_expired;
 954         timer->stt_expires = cfs_time_add(rpc->crpc_timeout,
 955                                           cfs_time_current_sec());
 956         stt_add_timer(timer);
 957         return;
 958 }
 959
 960 /*
 961  * Called with rpc->crpc_lock held.
 962  *
 963  * Upon exit the RPC expiry timer is not queued and the handler is not
 964  * running on any CPU. */
 965 void
 966 srpc_del_client_rpc_timer (srpc_client_rpc_t *rpc)
 967 {
 968         /* timer not planted or already exploded */
 969         if (rpc->crpc_timeout == 0) return;
 970
 971         /* timer sucessfully defused */
 972         if (stt_del_timer(&rpc->crpc_timer)) return;
 973
 974 #ifdef __KERNEL__
 975         /* timer detonated, wait for it to explode */
 976         while (rpc->crpc_timeout != 0) {
 977                 cfs_spin_unlock(&rpc->crpc_lock);
 978
 979                 cfs_schedule();
 980
 981                 cfs_spin_lock(&rpc->crpc_lock);
 982         }
 983 #else
 984         LBUG(); /* impossible in single-threaded runtime */
 985 #endif
 986         return;
 987 }
 988
 989 void
 990 srpc_client_rpc_done (srpc_client_rpc_t *rpc, int status)
 991 {
 992         swi_workitem_t *wi = &rpc->crpc_wi;
 993
 994         LASSERT (status != 0 || wi->swi_state == SWI_STATE_DONE);
 995
 996         cfs_spin_lock(&rpc->crpc_lock);
 997
 998         rpc->crpc_closed = 1;
 999         if (rpc->crpc_status == 0)
1000                 rpc->crpc_status = status;
1001
1002         srpc_del_client_rpc_timer(rpc);
1003
1004         CDEBUG_LIMIT ((status == 0) ? D_NET : D_NETERROR,
1005                 "Client RPC done: service %d, peer %s, status %s:%d:%d\n",
1006                 rpc->crpc_service, libcfs_id2str(rpc->crpc_dest),
1007                 swi_state2str(wi->swi_state), rpc->crpc_aborted, status);
1008
1009         /*
1010          * No one can schedule me now since:
1011          * - RPC timer has been defused.
1012          * - all LNet events have been fired.
1013          * - crpc_closed has been set, preventing srpc_abort_rpc from
1014          *   scheduling me.
1015          * Cancel pending schedules and prevent future schedule attempts:
1016          */
1017         LASSERT (!srpc_event_pending(rpc));
1018         swi_kill_workitem(wi);
1019
1020         cfs_spin_unlock(&rpc->crpc_lock);
1021
1022         (*rpc->crpc_done) (rpc);
1023         return;
1024 }
1025
1026 /* sends an outgoing RPC */
1027 int
1028 srpc_send_rpc (swi_workitem_t *wi)
1029 {
1030         int                rc = 0;
1031         srpc_client_rpc_t *rpc = wi->swi_workitem.wi_data;
1032         srpc_msg_t        *reply = &rpc->crpc_replymsg;
1033         int                do_bulk = rpc->crpc_bulk.bk_niov > 0;
1034
1035         LASSERT (rpc != NULL);
1036         LASSERT (wi == &rpc->crpc_wi);
1037
1038         cfs_spin_lock(&rpc->crpc_lock);
1039
1040         if (rpc->crpc_aborted) {
1041                 cfs_spin_unlock(&rpc->crpc_lock);
1042                 goto abort;
1043         }
1044
1045         cfs_spin_unlock(&rpc->crpc_lock);
1046
1047         switch (wi->swi_state) {
1048         default:
1049                 LBUG ();
1050         case SWI_STATE_NEWBORN:
1051                 LASSERT (!srpc_event_pending(rpc));
1052
1053                 rc = srpc_prepare_reply(rpc);
1054                 if (rc != 0) {
1055                         srpc_client_rpc_done(rpc, rc);
1056                         return 1;
1057                 }
1058
1059                 rc = srpc_prepare_bulk(rpc);
1060                 if (rc != 0) break;
1061
1062                 wi->swi_state = SWI_STATE_REQUEST_SUBMITTED;
1063                 rc = srpc_send_request(rpc);
1064                 break;
1065
1066         case SWI_STATE_REQUEST_SUBMITTED:
1067                 /* CAVEAT EMPTOR: rqtev, rpyev, and bulkev may come in any
1068                  * order; however, they're processed in a strict order:
1069                  * rqt, rpy, and bulk. */
1070                 if (!rpc->crpc_reqstev.ev_fired) break;
1071
1072                 rc = rpc->crpc_reqstev.ev_status;
1073                 if (rc != 0) break;
1074
1075                 wi->swi_state = SWI_STATE_REQUEST_SENT;
1076                 /* perhaps more events, fall thru */
1077         case SWI_STATE_REQUEST_SENT: {
1078                 srpc_msg_type_t type = srpc_service2reply(rpc->crpc_service);
1079
1080                 if (!rpc->crpc_replyev.ev_fired) break;
1081
1082                 rc = rpc->crpc_replyev.ev_status;
1083                 if (rc != 0) break;
1084
1085                 if ((reply->msg_type != type &&
1086                      reply->msg_type != __swab32(type)) ||
1087                     (reply->msg_magic != SRPC_MSG_MAGIC &&
1088                      reply->msg_magic != __swab32(SRPC_MSG_MAGIC))) {
1089                         CWARN ("Bad message from %s: type %u (%d expected),"
1090                                " magic %u (%d expected).\n",
1091                                libcfs_id2str(rpc->crpc_dest),
1092                                reply->msg_type, type,
1093                                reply->msg_magic, SRPC_MSG_MAGIC);
1094                         rc = -EBADMSG;
1095                         break;
1096                 }
1097
1098                 if (do_bulk && reply->msg_body.reply.status != 0) {
1099                         CWARN ("Remote error %d at %s, unlink bulk buffer in "
1100                                "case peer didn't initiate bulk transfer\n",
1101                                reply->msg_body.reply.status,
1102                                libcfs_id2str(rpc->crpc_dest));
1103                         LNetMDUnlink(rpc->crpc_bulk.bk_mdh);
1104                 }
1105
1106                 wi->swi_state = SWI_STATE_REPLY_RECEIVED;
1107         }
1108         case SWI_STATE_REPLY_RECEIVED:
1109                 if (do_bulk && !rpc->crpc_bulkev.ev_fired) break;
1110
1111                 rc = do_bulk ? rpc->crpc_bulkev.ev_status : 0;
1112
1113                 /* Bulk buffer was unlinked due to remote error. Clear error
1114                  * since reply buffer still contains valid data.
1115                  * NB rpc->crpc_done shouldn't look into bulk data in case of
1116                  * remote error. */
1117                 if (do_bulk && rpc->crpc_bulkev.ev_lnet == LNET_EVENT_UNLINK &&
1118                     rpc->crpc_status == 0 && reply->msg_body.reply.status != 0)
1119                         rc = 0;
1120
1121                 wi->swi_state = SWI_STATE_DONE;
1122                 srpc_client_rpc_done(rpc, rc);
1123                 return 1;
1124         }
1125
1126         if (rc != 0) {
1127                 cfs_spin_lock(&rpc->crpc_lock);
1128                 srpc_abort_rpc(rpc, rc);
1129                 cfs_spin_unlock(&rpc->crpc_lock);
1130         }
1131
1132 abort:
1133         if (rpc->crpc_aborted) {
1134                 LNetMDUnlink(rpc->crpc_reqstmdh);
1135                 LNetMDUnlink(rpc->crpc_replymdh);
1136                 LNetMDUnlink(rpc->crpc_bulk.bk_mdh);
1137
1138                 if (!srpc_event_pending(rpc)) {
1139                         srpc_client_rpc_done(rpc, -EINTR);
1140                         return 1;
1141                 }
1142         }
1143         return 0;
1144 }
1145
1146 srpc_client_rpc_t *
1147 srpc_create_client_rpc (lnet_process_id_t peer, int service,
1148                         int nbulkiov, int bulklen,
1149                         void (*rpc_done)(srpc_client_rpc_t *),
1150                         void (*rpc_fini)(srpc_client_rpc_t *), void *priv)
1151 {
1152         srpc_client_rpc_t *rpc;
1153
1154         LIBCFS_ALLOC(rpc, offsetof(srpc_client_rpc_t,
1155                                    crpc_bulk.bk_iovs[nbulkiov]));
1156         if (rpc == NULL)
1157                 return NULL;
1158
1159         srpc_init_client_rpc(rpc, peer, service, nbulkiov,
1160                              bulklen, rpc_done, rpc_fini, priv);
1161         return rpc;
1162 }
1163
1164 /* called with rpc->crpc_lock held */
1165 void
1166 srpc_abort_rpc (srpc_client_rpc_t *rpc, int why)
1167 {
1168         LASSERT (why != 0);
1169
1170         if (rpc->crpc_aborted || /* already aborted */
1171             rpc->crpc_closed)    /* callback imminent */
1172                 return;
1173
1174         CDEBUG (D_NET,
1175                 "Aborting RPC: service %d, peer %s, state %s, why %d\n",
1176                 rpc->crpc_service, libcfs_id2str(rpc->crpc_dest),
1177                 swi_state2str(rpc->crpc_wi.swi_state), why);
1178
1179         rpc->crpc_aborted = 1;
1180         rpc->crpc_status  = why;
1181         swi_schedule_workitem(&rpc->crpc_wi);
1182         return;
1183 }
1184
1185 /* called with rpc->crpc_lock held */
1186 void
1187 srpc_post_rpc (srpc_client_rpc_t *rpc)
1188 {
1189         LASSERT (!rpc->crpc_aborted);
1190         LASSERT (srpc_data.rpc_state == SRPC_STATE_RUNNING);
1191         LASSERT ((rpc->crpc_bulk.bk_len & ~CFS_PAGE_MASK) == 0);
1192
1193         CDEBUG (D_NET, "Posting RPC: peer %s, service %d, timeout %d\n",
1194                 libcfs_id2str(rpc->crpc_dest), rpc->crpc_service,
1195                 rpc->crpc_timeout);
1196
1197         srpc_add_client_rpc_timer(rpc);
1198         swi_schedule_workitem(&rpc->crpc_wi);
1199         return;
1200 }
1201
1202
1203 int
1204 srpc_send_reply (srpc_server_rpc_t *rpc)
1205 {
1206         srpc_event_t   *ev = &rpc->srpc_ev;
1207         srpc_msg_t     *msg = &rpc->srpc_replymsg;
1208         srpc_buffer_t  *buffer = rpc->srpc_reqstbuf;
1209         srpc_service_t *sv = rpc->srpc_service;
1210         __u64           rpyid;
1211         int             rc;
1212
1213         LASSERT (buffer != NULL);
1214         rpyid = buffer->buf_msg.msg_body.reqst.rpyid;
1215
1216         cfs_spin_lock(&sv->sv_lock);
1217
1218         if (!sv->sv_shuttingdown &&
1219             sv->sv_id > SRPC_FRAMEWORK_SERVICE_MAX_ID) {
1220                 /* Repost buffer before replying since test client
1221                  * might send me another RPC once it gets the reply */
1222                 if (srpc_service_post_buffer(sv, buffer) != 0)
1223                         CWARN ("Failed to repost %s buffer\n", sv->sv_name);
1224                 rpc->srpc_reqstbuf = NULL;
1225         }
1226
1227         cfs_spin_unlock(&sv->sv_lock);
1228
1229         ev->ev_fired = 0;
1230         ev->ev_data  = rpc;
1231         ev->ev_type  = SRPC_REPLY_SENT;
1232
1233         msg->msg_magic   = SRPC_MSG_MAGIC;
1234         msg->msg_version = SRPC_MSG_VERSION;
1235         msg->msg_type    = srpc_service2reply(sv->sv_id);
1236
1237         rc = srpc_post_active_rdma(SRPC_RDMA_PORTAL, rpyid, msg,
1238                                    sizeof(*msg), LNET_MD_OP_PUT,
1239                                    rpc->srpc_peer, rpc->srpc_self,
1240                                    &rpc->srpc_replymdh, ev);
1241         if (rc != 0)
1242                 ev->ev_fired = 1;  /* no more event expected */
1243         return rc;
1244 }
1245
1246 /* when in kernel always called with LNET_LOCK() held, and in thread context */
1247 void
1248 srpc_lnet_ev_handler (lnet_event_t *ev)
1249 {
1250         srpc_event_t      *rpcev = ev->md.user_ptr;
1251         srpc_client_rpc_t *crpc;
1252         srpc_server_rpc_t *srpc;
1253         srpc_buffer_t     *buffer;
1254         srpc_service_t    *sv;
1255         srpc_msg_t        *msg;
1256         srpc_msg_type_t    type;
1257
1258         LASSERT (!cfs_in_interrupt());
1259
1260         if (ev->status != 0) {
1261                 cfs_spin_lock(&srpc_data.rpc_glock);
1262                 srpc_data.rpc_counters.errors++;
1263                 cfs_spin_unlock(&srpc_data.rpc_glock);
1264         }
1265
1266         rpcev->ev_lnet = ev->type;
1267
1268         switch (rpcev->ev_type) {
1269         default:
1270                 CERROR("Unknown event: status %d, type %d, lnet %d\n",
1271                        rpcev->ev_status, rpcev->ev_type, rpcev->ev_lnet);
1272                 LBUG ();
1273         case SRPC_REQUEST_SENT:
1274                 if (ev->status == 0 && ev->type != LNET_EVENT_UNLINK) {
1275                         cfs_spin_lock(&srpc_data.rpc_glock);
1276                         srpc_data.rpc_counters.rpcs_sent++;
1277                         cfs_spin_unlock(&srpc_data.rpc_glock);
1278                 }
1279         case SRPC_REPLY_RCVD:
1280         case SRPC_BULK_REQ_RCVD:
1281                 crpc = rpcev->ev_data;
1282
1283                 if (rpcev != &crpc->crpc_reqstev &&
1284                     rpcev != &crpc->crpc_replyev &&
1285                     rpcev != &crpc->crpc_bulkev) {
1286                         CERROR("rpcev %p, crpc %p, reqstev %p, replyev %p, bulkev %p\n",
1287                                rpcev, crpc, &crpc->crpc_reqstev,
1288                                &crpc->crpc_replyev, &crpc->crpc_bulkev);
1289                         CERROR("Bad event: status %d, type %d, lnet %d\n",
1290                                rpcev->ev_status, rpcev->ev_type, rpcev->ev_lnet);
1291                         LBUG ();
1292                 }
1293
1294                 cfs_spin_lock(&crpc->crpc_lock);
1295
1296                 LASSERT (rpcev->ev_fired == 0);
1297                 rpcev->ev_fired  = 1;
1298                 rpcev->ev_status = (ev->type == LNET_EVENT_UNLINK) ?
1299                                                 -EINTR : ev->status;
1300                 swi_schedule_workitem(&crpc->crpc_wi);
1301
1302                 cfs_spin_unlock(&crpc->crpc_lock);
1303                 break;
1304
1305         case SRPC_REQUEST_RCVD:
1306                 sv = rpcev->ev_data;
1307
1308                 LASSERT (rpcev == &sv->sv_ev);
1309
1310                 cfs_spin_lock(&sv->sv_lock);
1311
1312                 LASSERT (ev->unlinked);
1313                 LASSERT (ev->type == LNET_EVENT_PUT ||
1314                          ev->type == LNET_EVENT_UNLINK);
1315                 LASSERT (ev->type != LNET_EVENT_UNLINK ||
1316                          sv->sv_shuttingdown);
1317
1318                 buffer = container_of(ev->md.start, srpc_buffer_t, buf_msg);
1319                 buffer->buf_peer = ev->initiator;
1320                 buffer->buf_self = ev->target.nid;
1321
1322                 sv->sv_nposted_msg--;
1323                 LASSERT (sv->sv_nposted_msg >= 0);
1324
1325                 if (sv->sv_shuttingdown) {
1326                         /* Leave buffer on sv->sv_posted_msgq since
1327                          * srpc_finish_service needs to traverse it. */
1328                         cfs_spin_unlock(&sv->sv_lock);
1329                         break;
1330                 }
1331
1332                 cfs_list_del(&buffer->buf_list); /* from sv->sv_posted_msgq */
1333                 msg = &buffer->buf_msg;
1334                 type = srpc_service2request(sv->sv_id);
1335
1336                 if (ev->status != 0 || ev->mlength != sizeof(*msg) ||
1337                     (msg->msg_type != type &&
1338                      msg->msg_type != __swab32(type)) ||
1339                     (msg->msg_magic != SRPC_MSG_MAGIC &&
1340                      msg->msg_magic != __swab32(SRPC_MSG_MAGIC))) {
1341                         CERROR ("Dropping RPC (%s) from %s: "
1342                                 "status %d mlength %d type %u magic %u.\n",
1343                                 sv->sv_name, libcfs_id2str(ev->initiator),
1344                                 ev->status, ev->mlength,
1345                                 msg->msg_type, msg->msg_magic);
1346
1347                         /* NB can't call srpc_service_recycle_buffer here since
1348                          * it may call LNetM[DE]Attach. The invalid magic tells
1349                          * srpc_handle_rpc to drop this RPC */
1350                         msg->msg_magic = 0;
1351                 }
1352
1353                 if (!cfs_list_empty(&sv->sv_free_rpcq)) {
1354                         srpc = cfs_list_entry(sv->sv_free_rpcq.next,
1355                                               srpc_server_rpc_t, srpc_list);
1356                         cfs_list_del(&srpc->srpc_list);
1357
1358                         srpc_init_server_rpc(srpc, sv, buffer);
1359                         cfs_list_add_tail(&srpc->srpc_list,
1360                                           &sv->sv_active_rpcq);
1361                         srpc_schedule_server_rpc(srpc);
1362                 } else {
1363                         cfs_list_add_tail(&buffer->buf_list,
1364                                           &sv->sv_blocked_msgq);
1365                 }
1366
1367                 cfs_spin_unlock(&sv->sv_lock);
1368
1369                 cfs_spin_lock(&srpc_data.rpc_glock);
1370                 srpc_data.rpc_counters.rpcs_rcvd++;
1371                 cfs_spin_unlock(&srpc_data.rpc_glock);
1372                 break;
1373
1374         case SRPC_BULK_GET_RPLD:
1375                 LASSERT (ev->type == LNET_EVENT_SEND ||
1376                          ev->type == LNET_EVENT_REPLY ||
1377                          ev->type == LNET_EVENT_UNLINK);
1378
1379                 if (!ev->unlinked)
1380                         break; /* wait for final event */
1381
1382         case SRPC_BULK_PUT_SENT:
1383                 if (ev->status == 0 && ev->type != LNET_EVENT_UNLINK) {
1384                         cfs_spin_lock(&srpc_data.rpc_glock);
1385
1386                         if (rpcev->ev_type == SRPC_BULK_GET_RPLD)
1387                                 srpc_data.rpc_counters.bulk_get += ev->mlength;
1388                         else
1389                                 srpc_data.rpc_counters.bulk_put += ev->mlength;
1390
1391                         cfs_spin_unlock(&srpc_data.rpc_glock);
1392                 }
1393         case SRPC_REPLY_SENT:
1394                 srpc = rpcev->ev_data;
1395                 sv = srpc->srpc_service;
1396
1397                 LASSERT (rpcev == &srpc->srpc_ev);
1398
1399                 cfs_spin_lock(&sv->sv_lock);
1400
1401                 rpcev->ev_fired  = 1;
1402                 rpcev->ev_status = (ev->type == LNET_EVENT_UNLINK) ?
1403                                                 -EINTR : ev->status;
1404                 srpc_schedule_server_rpc(srpc);
1405
1406                 cfs_spin_unlock(&sv->sv_lock);
1407                 break;
1408         }
1409
1410         return;
1411 }
1412
1413 #ifndef __KERNEL__
1414
1415 int
1416 srpc_check_event (int timeout)
1417 {
1418         lnet_event_t ev;
1419         int          rc;
1420         int          i;
1421
1422         rc = LNetEQPoll(&srpc_data.rpc_lnet_eq, 1,
1423                         timeout * 1000, &ev, &i);
1424         if (rc == 0) return 0;
1425
1426         LASSERT (rc == -EOVERFLOW || rc == 1);
1427
1428         /* We can't affort to miss any events... */
1429         if (rc == -EOVERFLOW) {
1430                 CERROR ("Dropped an event!!!\n");
1431                 abort();
1432         }
1433
1434         srpc_lnet_ev_handler(&ev);
1435         return 1;
1436 }
1437
1438 #endif
1439
1440 int
1441 srpc_startup (void)
1442 {
1443         int rc;
1444
1445         memset(&srpc_data, 0, sizeof(struct smoketest_rpc));
1446         cfs_spin_lock_init(&srpc_data.rpc_glock);
1447
1448         /* 1 second pause to avoid timestamp reuse */
1449         cfs_pause(cfs_time_seconds(1));
1450         srpc_data.rpc_matchbits = ((__u64) cfs_time_current_sec()) << 48;
1451
1452         srpc_data.rpc_state = SRPC_STATE_NONE;
1453
1454 #ifdef __KERNEL__
1455         rc = LNetNIInit(LUSTRE_SRV_LNET_PID);
1456 #else
1457         if (the_lnet.ln_server_mode_flag)
1458                 rc = LNetNIInit(LUSTRE_SRV_LNET_PID);
1459         else
1460                 rc = LNetNIInit(getpid() | LNET_PID_USERFLAG);
1461 #endif
1462         if (rc < 0) {
1463                 CERROR ("LNetNIInit() has failed: %d\n", rc);
1464                 return rc;
1465         }
1466
1467         srpc_data.rpc_state = SRPC_STATE_NI_INIT;
1468
1469         LNetInvalidateHandle(&srpc_data.rpc_lnet_eq);
1470 #ifdef __KERNEL__
1471         rc = LNetEQAlloc(16, srpc_lnet_ev_handler, &srpc_data.rpc_lnet_eq);
1472 #else
1473         rc = LNetEQAlloc(10240, LNET_EQ_HANDLER_NONE, &srpc_data.rpc_lnet_eq);
1474 #endif
1475         if (rc != 0) {
1476                 CERROR("LNetEQAlloc() has failed: %d\n", rc);
1477                 goto bail;
1478         }
1479
1480         rc = LNetSetLazyPortal(SRPC_FRAMEWORK_REQUEST_PORTAL);
1481         LASSERT (rc == 0);
1482
1483         srpc_data.rpc_state = SRPC_STATE_EQ_INIT;
1484
1485         rc = stt_startup();
1486
1487 bail:
1488         if (rc != 0)
1489                 srpc_shutdown();
1490         else
1491                 srpc_data.rpc_state = SRPC_STATE_RUNNING;
1492
1493         return rc;
1494 }
1495
1496 void
1497 srpc_shutdown (void)
1498 {
1499         int i;
1500         int rc;
1501         int state;
1502
1503         state = srpc_data.rpc_state;
1504         srpc_data.rpc_state = SRPC_STATE_STOPPING;
1505
1506         switch (state) {
1507         default:
1508                 LBUG ();
1509         case SRPC_STATE_RUNNING:
1510                 cfs_spin_lock(&srpc_data.rpc_glock);
1511
1512                 for (i = 0; i <= SRPC_SERVICE_MAX_ID; i++) {
1513                         srpc_service_t *sv = srpc_data.rpc_services[i];
1514
1515                         LASSERTF (sv == NULL,
1516                                   "service not empty: id %d, name %s\n",
1517                                   i, sv->sv_name);
1518                 }
1519
1520                 cfs_spin_unlock(&srpc_data.rpc_glock);
1521
1522                 stt_shutdown();
1523
1524         case SRPC_STATE_EQ_INIT:
1525                 rc = LNetClearLazyPortal(SRPC_FRAMEWORK_REQUEST_PORTAL);
1526                 LASSERT (rc == 0);
1527                 rc = LNetEQFree(srpc_data.rpc_lnet_eq);
1528                 LASSERT (rc == 0); /* the EQ should have no user by now */
1529
1530         case SRPC_STATE_NI_INIT:
1531                 LNetNIFini();
1532                 break;
1533         }
1534
1535         return;
1536 }