lustre/ost/ost_handler.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) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/ost/ost_handler.c
  37  *
  38  * Author: Peter J. Braam <braam@clusterfs.com>
  39  * Author: Phil Schwan <phil@clusterfs.com>
  40  */
  41
  42 #ifndef EXPORT_SYMTAB
  43 # define EXPORT_SYMTAB
  44 #endif
  45 #define DEBUG_SUBSYSTEM S_OST
  46
  47 #include <linux/module.h>
  48 #include <obd_cksum.h>
  49 #include <obd_ost.h>
  50 #include <lustre_net.h>
  51 #include <lustre_dlm.h>
  52 #include <lustre_export.h>
  53 #include <lustre_debug.h>
  54 #include <linux/init.h>
  55 #include <lprocfs_status.h>
  56 #include <libcfs/list.h>
  57 #include <lustre_quota.h>
  58 #include "ost_internal.h"
  59
  60 static int oss_num_threads;
  61 CFS_MODULE_PARM(oss_num_threads, "i", int, 0444,
  62                 "number of OSS service threads to start");
  63
  64 static int ost_num_threads;
  65 CFS_MODULE_PARM(ost_num_threads, "i", int, 0444,
  66                 "number of OST service threads to start (deprecated)");
  67
  68 static int oss_num_create_threads;
  69 CFS_MODULE_PARM(oss_num_create_threads, "i", int, 0444,
  70                 "number of OSS create threads to start");
  71
  72 /**
  73  * Do not return server-side uid/gid to remote client
  74  */
  75 static void ost_drop_id(struct obd_export *exp, struct obdo *oa)
  76 {
  77         if (exp_connect_rmtclient(exp)) {
  78                 oa->o_uid = -1;
  79                 oa->o_gid = -1;
  80                 oa->o_valid &= ~(OBD_MD_FLUID | OBD_MD_FLGID);
  81         }
  82 }
  83
  84 /**
  85  * Validate oa from client.
  86  * If the request comes from 2.0 clients, currently only RSVD seq and IDIF
  87  * req are valid.
  88  *    a. for single MDS  seq = FID_SEQ_OST_MDT0,
  89  *    b. for CMD, seq = FID_SEQ_OST_MDT0, FID_SEQ_OST_MDT1 - FID_SEQ_OST_MAX
  90  */
  91 static int ost_validate_obdo(struct obd_export *exp, struct obdo *oa,
  92                              struct obd_ioobj *ioobj)
  93 {
  94         if (oa != NULL && !(oa->o_valid & OBD_MD_FLGROUP)) {
  95                 oa->o_seq = FID_SEQ_OST_MDT0;
  96                 if (ioobj)
  97                         ioobj->ioo_seq = FID_SEQ_OST_MDT0;
  98         /* remove fid_seq_is_rsvd() after FID-on-OST allows SEQ > 9 */
  99         } else if (oa == NULL || !(fid_seq_is_rsvd(oa->o_seq) ||
 100                                    fid_seq_is_mdt0(oa->o_seq))) {
 101                 CERROR("%s: client %s sent invalid object "POSTID"\n",
 102                        exp->exp_obd->obd_name, obd_export_nid2str(exp),
 103                        oa ? oa->o_id : -1, oa ? oa->o_seq : -1);
 104                 return -EPROTO;
 105         }
 106         obdo_from_ostid(oa, &oa->o_oi);
 107         if (ioobj)
 108                 ioobj_from_obdo(ioobj, oa);
 109         return 0;
 110 }
 111
 112 void oti_to_request(struct obd_trans_info *oti, struct ptlrpc_request *req)
 113 {
 114         struct oti_req_ack_lock *ack_lock;
 115         int i;
 116
 117         if (oti == NULL)
 118                 return;
 119
 120         if (req->rq_repmsg) {
 121                 __u64 versions[PTLRPC_NUM_VERSIONS] = { 0 };
 122                 lustre_msg_set_transno(req->rq_repmsg, oti->oti_transno);
 123                 versions[0] = oti->oti_pre_version;
 124                 lustre_msg_set_versions(req->rq_repmsg, versions);
 125         }
 126         req->rq_transno = oti->oti_transno;
 127
 128         /* XXX 4 == entries in oti_ack_locks??? */
 129         for (ack_lock = oti->oti_ack_locks, i = 0; i < 4; i++, ack_lock++) {
 130                 if (!ack_lock->mode)
 131                         break;
 132                 /* XXX not even calling target_send_reply in some cases... */
 133                 ptlrpc_save_lock (req, &ack_lock->lock, ack_lock->mode, 0);
 134         }
 135 }
 136
 137 static int ost_destroy(struct obd_export *exp, struct ptlrpc_request *req,
 138                        struct obd_trans_info *oti)
 139 {
 140         struct ost_body *body, *repbody;
 141         struct lustre_capa *capa = NULL;
 142         int rc;
 143         ENTRY;
 144
 145         /* Get the request body */
 146         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 147         if (body == NULL)
 148                 RETURN(-EFAULT);
 149
 150         if (body->oa.o_id == 0)
 151                 RETURN(-EPROTO);
 152
 153         rc = ost_validate_obdo(exp, &body->oa, NULL);
 154         if (rc)
 155                 RETURN(rc);
 156
 157         /* If there's a DLM request, cancel the locks mentioned in it*/
 158         if (req_capsule_field_present(&req->rq_pill, &RMF_DLM_REQ, RCL_CLIENT)) {
 159                 struct ldlm_request *dlm;
 160
 161                 dlm = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
 162                 if (dlm == NULL)
 163                         RETURN (-EFAULT);
 164                 ldlm_request_cancel(req, dlm, 0);
 165         }
 166
 167         /* If there's a capability, get it */
 168         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 169                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 170                 if (capa == NULL) {
 171                         CERROR("Missing capability for OST DESTROY");
 172                         RETURN (-EFAULT);
 173                 }
 174         }
 175
 176         /* Prepare the reply */
 177         rc = req_capsule_server_pack(&req->rq_pill);
 178         if (rc)
 179                 RETURN(rc);
 180
 181         /* Get the log cancellation cookie */
 182         if (body->oa.o_valid & OBD_MD_FLCOOKIE)
 183                 oti->oti_logcookies = &body->oa.o_lcookie;
 184
 185         /* Finish the reply */
 186         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 187         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 188
 189         /* Do the destroy and set the reply status accordingly  */
 190         req->rq_status = obd_destroy(req->rq_svc_thread->t_env, exp,
 191                                      &repbody->oa, NULL, oti, NULL, capa);
 192         RETURN(0);
 193 }
 194
 195 /**
 196  * Helper function for getting server side [start, start+count] DLM lock
 197  * if asked by client.
 198  */
 199 static int ost_lock_get(struct obd_export *exp, struct obdo *oa,
 200                         __u64 start, __u64 count, struct lustre_handle *lh,
 201                         int mode, int flags)
 202 {
 203         struct ldlm_res_id res_id;
 204         ldlm_policy_data_t policy;
 205         __u64 end = start + count;
 206
 207         ENTRY;
 208
 209         LASSERT(!lustre_handle_is_used(lh));
 210         /* o_id and o_gr are used for localizing resource, if client miss to set
 211          * them, do not trigger ASSERTION. */
 212         if (unlikely((oa->o_valid & (OBD_MD_FLID | OBD_MD_FLGROUP)) !=
 213                      (OBD_MD_FLID | OBD_MD_FLGROUP)))
 214                 RETURN(-EPROTO);
 215
 216         if (!(oa->o_valid & OBD_MD_FLFLAGS) ||
 217             !(oa->o_flags & OBD_FL_SRVLOCK))
 218                 RETURN(0);
 219
 220         osc_build_res_name(oa->o_id, oa->o_seq, &res_id);
 221         CDEBUG(D_INODE, "OST-side extent lock.\n");
 222
 223         policy.l_extent.start = start & CFS_PAGE_MASK;
 224
 225         /* If ->o_blocks is EOF it means "lock till the end of the
 226          * file". Otherwise, it's size of a hole being punched (in bytes) */
 227         if (count == OBD_OBJECT_EOF || end < start)
 228                 policy.l_extent.end = OBD_OBJECT_EOF;
 229         else
 230                 policy.l_extent.end = end | ~CFS_PAGE_MASK;
 231
 232         RETURN(ldlm_cli_enqueue_local(exp->exp_obd->obd_namespace, &res_id,
 233                                       LDLM_EXTENT, &policy, mode, &flags,
 234                                       ldlm_blocking_ast, ldlm_completion_ast,
 235                                       ldlm_glimpse_ast, NULL, 0, NULL, lh));
 236 }
 237
 238 /* Helper function: release lock, if any. */
 239 static void ost_lock_put(struct obd_export *exp,
 240                          struct lustre_handle *lh, int mode)
 241 {
 242         ENTRY;
 243         if (lustre_handle_is_used(lh))
 244                 ldlm_lock_decref(lh, mode);
 245         EXIT;
 246 }
 247
 248 static int ost_getattr(struct obd_export *exp, struct ptlrpc_request *req)
 249 {
 250         struct ost_body *body, *repbody;
 251         struct obd_info *oinfo;
 252         struct lustre_handle lh = { 0 };
 253         struct lustre_capa *capa = NULL;
 254         int rc;
 255         ENTRY;
 256
 257         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 258         if (body == NULL)
 259                 RETURN(-EFAULT);
 260
 261         rc = ost_validate_obdo(exp, &body->oa, NULL);
 262         if (rc)
 263                 RETURN(rc);
 264
 265         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 266                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 267                 if (capa == NULL) {
 268                         CERROR("Missing capability for OST GETATTR");
 269                         RETURN(-EFAULT);
 270                 }
 271         }
 272
 273         rc = req_capsule_server_pack(&req->rq_pill);
 274         if (rc)
 275                 RETURN(rc);
 276
 277         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 278         repbody->oa = body->oa;
 279
 280         rc = ost_lock_get(exp, &repbody->oa, 0, OBD_OBJECT_EOF, &lh, LCK_PR, 0);
 281         if (rc)
 282                 RETURN(rc);
 283
 284         OBD_ALLOC_PTR(oinfo);
 285         if (!oinfo)
 286                 GOTO(unlock, rc = -ENOMEM);
 287         oinfo->oi_oa = &repbody->oa;
 288         oinfo->oi_capa = capa;
 289
 290         req->rq_status = obd_getattr(req->rq_svc_thread->t_env, exp, oinfo);
 291
 292         OBD_FREE_PTR(oinfo);
 293
 294         ost_drop_id(exp, &repbody->oa);
 295
 296 unlock:
 297         ost_lock_put(exp, &lh, LCK_PR);
 298         RETURN(rc);
 299 }
 300
 301 static int ost_statfs(struct ptlrpc_request *req)
 302 {
 303         struct obd_statfs *osfs;
 304         int rc;
 305         ENTRY;
 306
 307         rc = req_capsule_server_pack(&req->rq_pill);
 308         if (rc)
 309                 RETURN(rc);
 310
 311         osfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
 312
 313         req->rq_status = obd_statfs(req->rq_svc_thread->t_env, req->rq_export,
 314                                     osfs,
 315                                     cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 316                                     0);
 317         if (req->rq_status != 0)
 318                 CERROR("ost: statfs failed: rc %d\n", req->rq_status);
 319
 320         RETURN(0);
 321 }
 322
 323 static int ost_create(struct obd_export *exp, struct ptlrpc_request *req,
 324                       struct obd_trans_info *oti)
 325 {
 326         struct ost_body *body, *repbody;
 327         int rc;
 328         ENTRY;
 329
 330         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 331         if (body == NULL)
 332                 RETURN(-EFAULT);
 333
 334         rc = ost_validate_obdo(req->rq_export, &body->oa, NULL);
 335         if (rc)
 336                 RETURN(rc);
 337
 338         rc = req_capsule_server_pack(&req->rq_pill);
 339         if (rc)
 340                 RETURN(rc);
 341
 342         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 343         repbody->oa = body->oa;
 344         oti->oti_logcookies = &body->oa.o_lcookie;
 345
 346         req->rq_status = obd_create(req->rq_svc_thread->t_env, exp,
 347                                     &repbody->oa, NULL, oti);
 348         //obd_log_cancel(conn, NULL, 1, oti->oti_logcookies, 0);
 349         RETURN(0);
 350 }
 351
 352 static int ost_punch(struct obd_export *exp, struct ptlrpc_request *req,
 353                      struct obd_trans_info *oti)
 354 {
 355         struct ost_body *body, *repbody;
 356         int rc, flags = 0;
 357         struct lustre_handle lh = {0,};
 358         ENTRY;
 359
 360         /* check that we do support OBD_CONNECT_TRUNCLOCK. */
 361         CLASSERT(OST_CONNECT_SUPPORTED & OBD_CONNECT_TRUNCLOCK);
 362
 363         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 364         if (body == NULL)
 365                 RETURN(-EFAULT);
 366
 367         rc = ost_validate_obdo(exp, &body->oa, NULL);
 368         if (rc)
 369                 RETURN(rc);
 370
 371         if ((body->oa.o_valid & (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS)) !=
 372             (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS))
 373                 RETURN(-EPROTO);
 374
 375         rc = req_capsule_server_pack(&req->rq_pill);
 376         if (rc)
 377                 RETURN(rc);
 378
 379         /* standard truncate optimization: if file body is completely
 380          * destroyed, don't send data back to the server. */
 381         if (body->oa.o_size == 0)
 382                 flags |= LDLM_AST_DISCARD_DATA;
 383
 384         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 385         repbody->oa = body->oa;
 386
 387         rc = ost_lock_get(exp, &repbody->oa, repbody->oa.o_size,
 388                           repbody->oa.o_blocks, &lh, LCK_PW, flags);
 389         if (rc == 0) {
 390                 struct obd_info *oinfo;
 391                 struct lustre_capa *capa = NULL;
 392
 393                 if (repbody->oa.o_valid & OBD_MD_FLFLAGS &&
 394                     repbody->oa.o_flags == OBD_FL_SRVLOCK)
 395                         /*
 396                          * If OBD_FL_SRVLOCK is the only bit set in
 397                          * ->o_flags, clear OBD_MD_FLFLAGS to avoid falling
 398                          * through filter_setattr() to filter_iocontrol().
 399                          */
 400                         repbody->oa.o_valid &= ~OBD_MD_FLFLAGS;
 401
 402                 if (repbody->oa.o_valid & OBD_MD_FLOSSCAPA) {
 403                         capa = req_capsule_client_get(&req->rq_pill,
 404                                                       &RMF_CAPA1);
 405                         if (capa == NULL) {
 406                                 CERROR("Missing capability for OST PUNCH");
 407                                 GOTO(unlock, rc = -EFAULT);
 408                         }
 409                 }
 410
 411                 OBD_ALLOC_PTR(oinfo);
 412                 if (!oinfo)
 413                         GOTO(unlock, rc = -ENOMEM);
 414                 oinfo->oi_oa = &repbody->oa;
 415                 oinfo->oi_policy.l_extent.start = oinfo->oi_oa->o_size;
 416                 oinfo->oi_policy.l_extent.end = oinfo->oi_oa->o_blocks;
 417                 oinfo->oi_capa = capa;
 418                 oinfo->oi_flags = OBD_FL_PUNCH;
 419
 420                 req->rq_status = obd_punch(req->rq_svc_thread->t_env, exp,
 421                                            oinfo, oti, NULL);
 422                 OBD_FREE_PTR(oinfo);
 423 unlock:
 424                 ost_lock_put(exp, &lh, LCK_PW);
 425         }
 426
 427         ost_drop_id(exp, &repbody->oa);
 428         RETURN(rc);
 429 }
 430
 431 static int ost_sync(struct obd_export *exp, struct ptlrpc_request *req,
 432                     struct obd_trans_info *oti)
 433 {
 434         struct ost_body *body, *repbody;
 435         struct obd_info *oinfo;
 436         struct lustre_capa *capa = NULL;
 437         int rc;
 438         ENTRY;
 439
 440         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 441         if (body == NULL)
 442                 RETURN(-EFAULT);
 443
 444         rc = ost_validate_obdo(exp, &body->oa, NULL);
 445         if (rc)
 446                 RETURN(rc);
 447
 448         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 449                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 450                 if (capa == NULL) {
 451                         CERROR("Missing capability for OST SYNC");
 452                         RETURN (-EFAULT);
 453                 }
 454         }
 455
 456         rc = req_capsule_server_pack(&req->rq_pill);
 457         if (rc)
 458                 RETURN(rc);
 459
 460         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 461         repbody->oa = body->oa;
 462
 463         OBD_ALLOC_PTR(oinfo);
 464         if (!oinfo)
 465                 RETURN(-ENOMEM);
 466
 467         oinfo->oi_oa = &repbody->oa;
 468         oinfo->oi_capa = capa;
 469         oinfo->oi_jobid = oti->oti_jobid;
 470         req->rq_status = obd_sync(req->rq_svc_thread->t_env, exp, oinfo,
 471                                   repbody->oa.o_size, repbody->oa.o_blocks,
 472                                   NULL);
 473         OBD_FREE_PTR(oinfo);
 474
 475         ost_drop_id(exp, &repbody->oa);
 476         RETURN(0);
 477 }
 478
 479 static int ost_setattr(struct obd_export *exp, struct ptlrpc_request *req,
 480                        struct obd_trans_info *oti)
 481 {
 482         struct ost_body *body, *repbody;
 483         struct obd_info *oinfo;
 484         struct lustre_capa *capa = NULL;
 485         int rc;
 486         ENTRY;
 487
 488         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 489         if (body == NULL)
 490                 RETURN(-EFAULT);
 491
 492         rc = ost_validate_obdo(req->rq_export, &body->oa, NULL);
 493         if (rc)
 494                 RETURN(rc);
 495
 496         rc = req_capsule_server_pack(&req->rq_pill);
 497         if (rc)
 498                 RETURN(rc);
 499
 500         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 501                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 502                 if (capa == NULL) {
 503                         CERROR("Missing capability for OST SETATTR");
 504                         RETURN (-EFAULT);
 505                 }
 506         }
 507
 508         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 509         repbody->oa = body->oa;
 510
 511         OBD_ALLOC_PTR(oinfo);
 512         if (!oinfo)
 513                 RETURN(-ENOMEM);
 514         oinfo->oi_oa = &repbody->oa;
 515         oinfo->oi_capa = capa;
 516
 517         req->rq_status = obd_setattr(req->rq_svc_thread->t_env, exp, oinfo,
 518                                      oti);
 519
 520         OBD_FREE_PTR(oinfo);
 521
 522         ost_drop_id(exp, &repbody->oa);
 523         RETURN(0);
 524 }
 525
 526 static __u32 ost_checksum_bulk(struct ptlrpc_bulk_desc *desc, int opc,
 527                                cksum_type_t cksum_type)
 528 {
 529         __u32 cksum;
 530         int i;
 531
 532         cksum = init_checksum(cksum_type);
 533         for (i = 0; i < desc->bd_iov_count; i++) {
 534                 struct page *page = desc->bd_iov[i].kiov_page;
 535                 int off = desc->bd_iov[i].kiov_offset & ~CFS_PAGE_MASK;
 536                 char *ptr = kmap(page) + off;
 537                 int len = desc->bd_iov[i].kiov_len;
 538
 539                 /* corrupt the data before we compute the checksum, to
 540                  * simulate a client->OST data error */
 541                 if (i == 0 && opc == OST_WRITE &&
 542                     OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE))
 543                         memcpy(ptr, "bad3", min(4, len));
 544                 cksum = compute_checksum(cksum, ptr, len, cksum_type);
 545                 /* corrupt the data after we compute the checksum, to
 546                  * simulate an OST->client data error */
 547                 if (i == 0 && opc == OST_READ &&
 548                     OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND)) {
 549                         memcpy(ptr, "bad4", min(4, len));
 550                         /* nobody should use corrupted page again */
 551                         ClearPageUptodate(page);
 552                 }
 553                 kunmap(page);
 554         }
 555
 556         return fini_checksum(cksum, cksum_type);
 557 }
 558
 559 static int ost_brw_lock_get(int mode, struct obd_export *exp,
 560                             struct obd_ioobj *obj, struct niobuf_remote *nb,
 561                             struct lustre_handle *lh)
 562 {
 563         int flags                 = 0;
 564         int nrbufs                = obj->ioo_bufcnt;
 565         struct ldlm_res_id res_id;
 566         ldlm_policy_data_t policy;
 567         int i;
 568         ENTRY;
 569
 570         osc_build_res_name(obj->ioo_id, obj->ioo_seq, &res_id);
 571         LASSERT(mode == LCK_PR || mode == LCK_PW);
 572         LASSERT(!lustre_handle_is_used(lh));
 573
 574         if (nrbufs == 0 || !(nb[0].flags & OBD_BRW_SRVLOCK))
 575                 RETURN(0);
 576
 577         for (i = 1; i < nrbufs; i ++)
 578                 if ((nb[0].flags & OBD_BRW_SRVLOCK) !=
 579                     (nb[i].flags & OBD_BRW_SRVLOCK))
 580                         RETURN(-EFAULT);
 581
 582         policy.l_extent.start = nb[0].offset & CFS_PAGE_MASK;
 583         policy.l_extent.end   = (nb[nrbufs - 1].offset +
 584                                  nb[nrbufs - 1].len - 1) | ~CFS_PAGE_MASK;
 585
 586         RETURN(ldlm_cli_enqueue_local(exp->exp_obd->obd_namespace, &res_id,
 587                                       LDLM_EXTENT, &policy, mode, &flags,
 588                                       ldlm_blocking_ast, ldlm_completion_ast,
 589                                       ldlm_glimpse_ast, NULL, 0, NULL, lh));
 590 }
 591
 592 static void ost_brw_lock_put(int mode,
 593                              struct obd_ioobj *obj, struct niobuf_remote *niob,
 594                              struct lustre_handle *lh)
 595 {
 596         ENTRY;
 597         LASSERT(mode == LCK_PR || mode == LCK_PW);
 598         LASSERT((obj->ioo_bufcnt > 0 && (niob[0].flags & OBD_BRW_SRVLOCK)) ==
 599                 lustre_handle_is_used(lh));
 600         if (lustre_handle_is_used(lh))
 601                 ldlm_lock_decref(lh, mode);
 602         EXIT;
 603 }
 604
 605 /* Allocate thread local buffers if needed */
 606 static struct ost_thread_local_cache *ost_tls_get(struct ptlrpc_request *r)
 607 {
 608         struct ost_thread_local_cache *tls =
 609                 (struct ost_thread_local_cache *)(r->rq_svc_thread->t_data);
 610
 611         /* In normal mode of operation an I/O request is serviced only
 612          * by ll_ost_io threads each of them has own tls buffers allocated by
 613          * ost_thread_init().
 614          * During recovery, an I/O request may be queued until any of the ost
 615          * service threads process it. Not necessary it should be one of
 616          * ll_ost_io threads. In that case we dynamically allocating tls
 617          * buffers for the request service time. */
 618         if (unlikely(tls == NULL)) {
 619                 LASSERT(r->rq_export->exp_in_recovery);
 620                 OBD_ALLOC_PTR(tls);
 621                 if (tls != NULL) {
 622                         tls->temporary = 1;
 623                         r->rq_svc_thread->t_data = tls;
 624                 }
 625         }
 626         return  tls;
 627 }
 628
 629 /* Free thread local buffers if they were allocated only for servicing
 630  * this one request */
 631 static void ost_tls_put(struct ptlrpc_request *r)
 632 {
 633         struct ost_thread_local_cache *tls =
 634                 (struct ost_thread_local_cache *)(r->rq_svc_thread->t_data);
 635
 636         if (unlikely(tls->temporary)) {
 637                 OBD_FREE_PTR(tls);
 638                 r->rq_svc_thread->t_data = NULL;
 639         }
 640 }
 641
 642 static int ost_brw_read(struct ptlrpc_request *req, struct obd_trans_info *oti)
 643 {
 644         struct ptlrpc_bulk_desc *desc = NULL;
 645         struct obd_export *exp = req->rq_export;
 646         struct niobuf_remote *remote_nb;
 647         struct niobuf_local *local_nb;
 648         struct obd_ioobj *ioo;
 649         struct ost_body *body, *repbody;
 650         struct lustre_capa *capa = NULL;
 651         struct l_wait_info lwi;
 652         struct lustre_handle lockh = { 0 };
 653         int niocount, npages, nob = 0, rc, i;
 654         int no_reply = 0;
 655         struct ost_thread_local_cache *tls;
 656         ENTRY;
 657
 658         req->rq_bulk_read = 1;
 659
 660         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
 661                 GOTO(out, rc = -EIO);
 662
 663         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, (obd_timeout + 1) / 4);
 664
 665         /* Check if there is eviction in progress, and if so, wait for it to
 666          * finish */
 667         if (unlikely(cfs_atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
 668                 lwi = LWI_INTR(NULL, NULL); // We do not care how long it takes
 669                 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
 670                         !cfs_atomic_read(&exp->exp_obd->obd_evict_inprogress),
 671                         &lwi);
 672         }
 673         if (exp->exp_failed)
 674                 GOTO(out, rc = -ENOTCONN);
 675
 676         /* ost_body, ioobj & noibuf_remote are verified and swabbed in
 677          * ost_rw_hpreq_check(). */
 678         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 679         if (body == NULL)
 680                 GOTO(out, rc = -EFAULT);
 681
 682         /*
 683          * A req_capsule_X_get_array(pill, field, ptr_to_element_count) function
 684          * would be useful here and wherever we get &RMF_OBD_IOOBJ and
 685          * &RMF_NIOBUF_REMOTE.
 686          */
 687         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
 688         if (ioo == NULL)
 689                 GOTO(out, rc = -EFAULT);
 690
 691         rc = ost_validate_obdo(exp, &body->oa, ioo);
 692         if (rc)
 693                 RETURN(rc);
 694
 695         niocount = ioo->ioo_bufcnt;
 696         remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
 697         if (remote_nb == NULL)
 698                 GOTO(out, rc = -EFAULT);
 699
 700         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 701                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 702                 if (capa == NULL) {
 703                         CERROR("Missing capability for OST BRW READ");
 704                         GOTO(out, rc = -EFAULT);
 705                 }
 706         }
 707
 708         rc = req_capsule_server_pack(&req->rq_pill);
 709         if (rc)
 710                 GOTO(out, rc);
 711
 712         tls = ost_tls_get(req);
 713         if (tls == NULL)
 714                 GOTO(out_bulk, rc = -ENOMEM);
 715         local_nb = tls->local;
 716
 717         rc = ost_brw_lock_get(LCK_PR, exp, ioo, remote_nb, &lockh);
 718         if (rc != 0)
 719                 GOTO(out_tls, rc);
 720
 721         /*
 722          * If getting the lock took more time than
 723          * client was willing to wait, drop it. b=11330
 724          */
 725         if (cfs_time_current_sec() > req->rq_deadline ||
 726             OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
 727                 no_reply = 1;
 728                 CERROR("Dropping timed-out read from %s because locking"
 729                        "object "LPX64" took %ld seconds (limit was %ld).\n",
 730                        libcfs_id2str(req->rq_peer), ioo->ioo_id,
 731                        cfs_time_current_sec() - req->rq_arrival_time.tv_sec,
 732                        req->rq_deadline - req->rq_arrival_time.tv_sec);
 733                 GOTO(out_lock, rc = -ETIMEDOUT);
 734         }
 735
 736         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 737         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 738
 739         npages = OST_THREAD_POOL_SIZE;
 740         rc = obd_preprw(req->rq_svc_thread->t_env, OBD_BRW_READ, exp,
 741                         &repbody->oa, 1, ioo, remote_nb, &npages, local_nb,
 742                         oti, capa);
 743         if (rc != 0)
 744                 GOTO(out_lock, rc);
 745
 746         desc = ptlrpc_prep_bulk_exp(req, npages,
 747                                      BULK_PUT_SOURCE, OST_BULK_PORTAL);
 748         if (desc == NULL)
 749                 GOTO(out_commitrw, rc = -ENOMEM);
 750
 751         nob = 0;
 752         for (i = 0; i < npages; i++) {
 753                 int page_rc = local_nb[i].rc;
 754
 755                 if (page_rc < 0) {              /* error */
 756                         rc = page_rc;
 757                         break;
 758                 }
 759
 760                 nob += page_rc;
 761                 if (page_rc != 0) {             /* some data! */
 762                         LASSERT (local_nb[i].page != NULL);
 763                         ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 764                                               local_nb[i].offset & ~CFS_PAGE_MASK,
 765                                               page_rc);
 766                 }
 767
 768                 if (page_rc != local_nb[i].len) { /* short read */
 769                         /* All subsequent pages should be 0 */
 770                         while(++i < npages)
 771                                 LASSERT(local_nb[i].rc == 0);
 772                         break;
 773                 }
 774         }
 775
 776         if (body->oa.o_valid & OBD_MD_FLCKSUM) {
 777                 cksum_type_t cksum_type =
 778                         cksum_type_unpack(repbody->oa.o_valid & OBD_MD_FLFLAGS ?
 779                                           repbody->oa.o_flags : 0);
 780                 repbody->oa.o_flags = cksum_type_pack(cksum_type);
 781                 repbody->oa.o_valid = OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
 782                 repbody->oa.o_cksum = ost_checksum_bulk(desc, OST_READ,cksum_type);
 783                 CDEBUG(D_PAGE, "checksum at read origin: %x\n",
 784                        repbody->oa.o_cksum);
 785         } else {
 786                 repbody->oa.o_valid = 0;
 787         }
 788         /* We're finishing using body->oa as an input variable */
 789
 790         /* Check if client was evicted while we were doing i/o before touching
 791            network */
 792         if (rc == 0) {
 793                 if (likely(!CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)))
 794                         rc = target_bulk_io(exp, desc, &lwi);
 795                 no_reply = rc != 0;
 796         }
 797
 798 out_commitrw:
 799         /* Must commit after prep above in all cases */
 800         rc = obd_commitrw(req->rq_svc_thread->t_env, OBD_BRW_READ, exp,
 801                           &repbody->oa, 1, ioo, remote_nb, npages, local_nb,
 802                           oti, rc);
 803
 804         if (rc == 0)
 805                 ost_drop_id(exp, &repbody->oa);
 806
 807 out_lock:
 808         ost_brw_lock_put(LCK_PR, ioo, remote_nb, &lockh);
 809 out_tls:
 810         ost_tls_put(req);
 811 out_bulk:
 812         if (desc && !CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))
 813                 ptlrpc_free_bulk(desc);
 814 out:
 815         LASSERT(rc <= 0);
 816         if (rc == 0) {
 817                 req->rq_status = nob;
 818                 ptlrpc_lprocfs_brw(req, nob);
 819                 target_committed_to_req(req);
 820                 ptlrpc_reply(req);
 821         } else if (!no_reply) {
 822                 /* Only reply if there was no comms problem with bulk */
 823                 target_committed_to_req(req);
 824                 req->rq_status = rc;
 825                 ptlrpc_error(req);
 826         } else {
 827                 /* reply out callback would free */
 828                 ptlrpc_req_drop_rs(req);
 829                 LCONSOLE_WARN("%s: Bulk IO read error with %s (at %s), "
 830                               "client will retry: rc %d\n",
 831                               exp->exp_obd->obd_name,
 832                               obd_uuid2str(&exp->exp_client_uuid),
 833                               obd_export_nid2str(exp), rc);
 834         }
 835         /* send a bulk after reply to simulate a network delay or reordering
 836          * by a router */
 837         if (unlikely(CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))) {
 838                 cfs_waitq_t              waitq;
 839                 struct l_wait_info       lwi1;
 840
 841                 CDEBUG(D_INFO, "reorder BULK\n");
 842                 cfs_waitq_init(&waitq);
 843
 844                 lwi1 = LWI_TIMEOUT_INTR(cfs_time_seconds(3), NULL, NULL, NULL);
 845                 l_wait_event(waitq, 0, &lwi1);
 846                 rc = target_bulk_io(exp, desc, &lwi);
 847                 ptlrpc_free_bulk(desc);
 848         }
 849
 850         RETURN(rc);
 851 }
 852
 853 static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
 854 {
 855         struct ptlrpc_bulk_desc *desc = NULL;
 856         struct obd_export       *exp = req->rq_export;
 857         struct niobuf_remote    *remote_nb;
 858         struct niobuf_local     *local_nb;
 859         struct obd_ioobj        *ioo;
 860         struct ost_body         *body, *repbody;
 861         struct l_wait_info       lwi;
 862         struct lustre_handle     lockh = {0};
 863         struct lustre_capa      *capa = NULL;
 864         __u32                   *rcs;
 865         int objcount, niocount, npages;
 866         int rc, i, j;
 867         obd_count                client_cksum = 0, server_cksum = 0;
 868         cksum_type_t             cksum_type = OBD_CKSUM_CRC32;
 869         int                      no_reply = 0, mmap = 0;
 870         __u32                    o_uid = 0, o_gid = 0;
 871         struct ost_thread_local_cache *tls;
 872         ENTRY;
 873
 874         req->rq_bulk_write = 1;
 875
 876         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
 877                 GOTO(out, rc = -EIO);
 878         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK2))
 879                 GOTO(out, rc = -EFAULT);
 880
 881         /* pause before transaction has been started */
 882         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, (obd_timeout + 1) / 4);
 883
 884         /* ost_body, ioobj & noibuf_remote are verified and swabbed in
 885          * ost_rw_hpreq_check(). */
 886         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 887         if (body == NULL)
 888                 GOTO(out, rc = -EFAULT);
 889
 890         objcount = req_capsule_get_size(&req->rq_pill, &RMF_OBD_IOOBJ,
 891                                         RCL_CLIENT) / sizeof(*ioo);
 892         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
 893         if (ioo == NULL)
 894                 GOTO(out, rc = -EFAULT);
 895
 896         rc = ost_validate_obdo(exp, &body->oa, ioo);
 897         if (rc)
 898                 RETURN(rc);
 899
 900         for (niocount = i = 0; i < objcount; i++)
 901                 niocount += ioo[i].ioo_bufcnt;
 902
 903         /*
 904          * It'd be nice to have a capsule function to indicate how many elements
 905          * there were in a buffer for an RMF that's declared to be an array.
 906          * It's easy enough to compute the number of elements here though.
 907          */
 908         remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
 909         if (remote_nb == NULL || niocount != (req_capsule_get_size(&req->rq_pill,
 910             &RMF_NIOBUF_REMOTE, RCL_CLIENT) / sizeof(*remote_nb)))
 911                 GOTO(out, rc = -EFAULT);
 912
 913         if ((remote_nb[0].flags & OBD_BRW_MEMALLOC) &&
 914             (exp->exp_connection->c_peer.nid == exp->exp_connection->c_self))
 915                 cfs_memory_pressure_set();
 916
 917         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 918                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 919                 if (capa == NULL) {
 920                         CERROR("Missing capability for OST BRW WRITE");
 921                         GOTO(out, rc = -EFAULT);
 922                 }
 923         }
 924
 925         req_capsule_set_size(&req->rq_pill, &RMF_RCS, RCL_SERVER,
 926                              niocount * sizeof(*rcs));
 927         rc = req_capsule_server_pack(&req->rq_pill);
 928         if (rc != 0)
 929                 GOTO(out, rc);
 930         CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_PACK, cfs_fail_val);
 931         rcs = req_capsule_server_get(&req->rq_pill, &RMF_RCS);
 932
 933         tls = ost_tls_get(req);
 934         if (tls == NULL)
 935                 GOTO(out_bulk, rc = -ENOMEM);
 936         local_nb = tls->local;
 937
 938         rc = ost_brw_lock_get(LCK_PW, exp, ioo, remote_nb, &lockh);
 939         if (rc != 0)
 940                 GOTO(out_tls, rc);
 941
 942         /*
 943          * If getting the lock took more time than
 944          * client was willing to wait, drop it. b=11330
 945          */
 946         if (cfs_time_current_sec() > req->rq_deadline ||
 947             OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
 948                 no_reply = 1;
 949                 CERROR("Dropping timed-out write from %s because locking "
 950                        "object "LPX64" took %ld seconds (limit was %ld).\n",
 951                        libcfs_id2str(req->rq_peer), ioo->ioo_id,
 952                        cfs_time_current_sec() - req->rq_arrival_time.tv_sec,
 953                        req->rq_deadline - req->rq_arrival_time.tv_sec);
 954                 GOTO(out_lock, rc = -ETIMEDOUT);
 955         }
 956
 957         /* obd_preprw clobbers oa->valid, so save what we need */
 958         if (body->oa.o_valid & OBD_MD_FLCKSUM) {
 959                 client_cksum = body->oa.o_cksum;
 960                 if (body->oa.o_valid & OBD_MD_FLFLAGS)
 961                         cksum_type = cksum_type_unpack(body->oa.o_flags);
 962         }
 963         if (body->oa.o_valid & OBD_MD_FLFLAGS && body->oa.o_flags & OBD_FL_MMAP)
 964                 mmap = 1;
 965
 966         /* Because we already sync grant info with client when reconnect,
 967          * grant info will be cleared for resent req, then fed_grant and
 968          * total_grant will not be modified in following preprw_write */
 969         if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
 970                 DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
 971                 body->oa.o_valid &= ~OBD_MD_FLGRANT;
 972         }
 973
 974         if (exp_connect_rmtclient(exp)) {
 975                 o_uid = body->oa.o_uid;
 976                 o_gid = body->oa.o_gid;
 977         }
 978
 979         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 980         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 981
 982         npages = OST_THREAD_POOL_SIZE;
 983         rc = obd_preprw(req->rq_svc_thread->t_env, OBD_BRW_WRITE, exp,
 984                         &repbody->oa, objcount, ioo, remote_nb, &npages,
 985                         local_nb, oti, capa);
 986         if (rc != 0)
 987                 GOTO(out_lock, rc);
 988
 989         desc = ptlrpc_prep_bulk_exp(req, npages,
 990                                      BULK_GET_SINK, OST_BULK_PORTAL);
 991         if (desc == NULL)
 992                 GOTO(skip_transfer, rc = -ENOMEM);
 993
 994         /* NB Having prepped, we must commit... */
 995
 996         for (i = 0; i < npages; i++)
 997                 ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 998                                       local_nb[i].offset & ~CFS_PAGE_MASK,
 999                                       local_nb[i].len);
1000
1001         rc = sptlrpc_svc_prep_bulk(req, desc);
1002         if (rc != 0)
1003                 GOTO(out_lock, rc);
1004
1005         rc = target_bulk_io(exp, desc, &lwi);
1006         no_reply = rc != 0;
1007
1008 skip_transfer:
1009         if (client_cksum != 0 && rc == 0) {
1010                 static int cksum_counter;
1011                 repbody->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1012                 repbody->oa.o_flags &= ~OBD_FL_CKSUM_ALL;
1013                 repbody->oa.o_flags |= cksum_type_pack(cksum_type);
1014                 server_cksum = ost_checksum_bulk(desc, OST_WRITE, cksum_type);
1015                 repbody->oa.o_cksum = server_cksum;
1016                 cksum_counter++;
1017                 if (unlikely(client_cksum != server_cksum)) {
1018                         CDEBUG_LIMIT(mmap ? D_INFO : D_ERROR,
1019                                      "client csum %x, server csum %x\n",
1020                                      client_cksum, server_cksum);
1021                         cksum_counter = 0;
1022                 } else if ((cksum_counter & (-cksum_counter)) == cksum_counter){
1023                         CDEBUG(D_INFO, "Checksum %u from %s OK: %x\n",
1024                                cksum_counter, libcfs_id2str(req->rq_peer),
1025                                server_cksum);
1026                 }
1027         }
1028
1029         /* Must commit after prep above in all cases */
1030         rc = obd_commitrw(req->rq_svc_thread->t_env, OBD_BRW_WRITE, exp,
1031                           &repbody->oa, objcount, ioo, remote_nb, npages,
1032                           local_nb, oti, rc);
1033         if (rc == -ENOTCONN)
1034                 /* quota acquire process has been given up because
1035                  * either the client has been evicted or the client
1036                  * has timed out the request already */
1037                 no_reply = 1;
1038
1039         if (exp_connect_rmtclient(exp)) {
1040                 repbody->oa.o_uid = o_uid;
1041                 repbody->oa.o_gid = o_gid;
1042         }
1043
1044         /*
1045          * Disable sending mtime back to the client. If the client locked the
1046          * whole object, then it has already updated the mtime on its side,
1047          * otherwise it will have to glimpse anyway (see bug 21489, comment 32)
1048          */
1049         repbody->oa.o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLATIME);
1050
1051         if (unlikely(client_cksum != server_cksum && rc == 0 && !mmap)) {
1052                 int  new_cksum = ost_checksum_bulk(desc, OST_WRITE, cksum_type);
1053                 char *msg;
1054                 char *via;
1055                 char *router;
1056
1057                 if (new_cksum == server_cksum)
1058                         msg = "changed in transit before arrival at OST";
1059                 else if (new_cksum == client_cksum)
1060                         msg = "initial checksum before message complete";
1061                 else
1062                         msg = "changed in transit AND after initial checksum";
1063
1064                 if (req->rq_peer.nid == desc->bd_sender) {
1065                         via = router = "";
1066                 } else {
1067                         via = " via ";
1068                         router = libcfs_nid2str(desc->bd_sender);
1069                 }
1070
1071                 LCONSOLE_ERROR_MSG(0x168, "%s: BAD WRITE CHECKSUM: %s from "
1072                                    "%s%s%s inode "DFID" object "
1073                                    LPU64"/"LPU64" extent ["LPU64"-"LPU64"]\n",
1074                                    exp->exp_obd->obd_name, msg,
1075                                    libcfs_id2str(req->rq_peer),
1076                                    via, router,
1077                                    body->oa.o_valid & OBD_MD_FLFID ?
1078                                                 body->oa.o_parent_seq : (__u64)0,
1079                                    body->oa.o_valid & OBD_MD_FLFID ?
1080                                                 body->oa.o_parent_oid : 0,
1081                                    body->oa.o_valid & OBD_MD_FLFID ?
1082                                                 body->oa.o_parent_ver : 0,
1083                                    body->oa.o_id,
1084                                    body->oa.o_valid & OBD_MD_FLGROUP ?
1085                                                 body->oa.o_seq : (__u64)0,
1086                                    local_nb[0].offset,
1087                                    local_nb[npages-1].offset +
1088                                    local_nb[npages-1].len - 1 );
1089                 CERROR("client csum %x, original server csum %x, "
1090                        "server csum now %x\n",
1091                        client_cksum, server_cksum, new_cksum);
1092         }
1093
1094         if (rc == 0) {
1095                 int nob = 0;
1096
1097                 /* set per-requested niobuf return codes */
1098                 for (i = j = 0; i < niocount; i++) {
1099                         int len = remote_nb[i].len;
1100
1101                         nob += len;
1102                         rcs[i] = 0;
1103                         do {
1104                                 LASSERT(j < npages);
1105                                 if (local_nb[j].rc < 0)
1106                                         rcs[i] = local_nb[j].rc;
1107                                 len -= local_nb[j].len;
1108                                 j++;
1109                         } while (len > 0);
1110                         LASSERT(len == 0);
1111                 }
1112                 LASSERT(j == npages);
1113                 ptlrpc_lprocfs_brw(req, nob);
1114         }
1115
1116 out_lock:
1117         ost_brw_lock_put(LCK_PW, ioo, remote_nb, &lockh);
1118 out_tls:
1119         ost_tls_put(req);
1120 out_bulk:
1121         if (desc)
1122                 ptlrpc_free_bulk(desc);
1123 out:
1124         if (rc == 0) {
1125                 oti_to_request(oti, req);
1126                 target_committed_to_req(req);
1127                 rc = ptlrpc_reply(req);
1128         } else if (!no_reply) {
1129                 /* Only reply if there was no comms problem with bulk */
1130                 target_committed_to_req(req);
1131                 req->rq_status = rc;
1132                 ptlrpc_error(req);
1133         } else {
1134                 /* reply out callback would free */
1135                 ptlrpc_req_drop_rs(req);
1136                 LCONSOLE_WARN("%s: Bulk IO write error with %s (at %s), "
1137                               "client will retry: rc %d\n",
1138                               exp->exp_obd->obd_name,
1139                               obd_uuid2str(&exp->exp_client_uuid),
1140                               obd_export_nid2str(exp), rc);
1141         }
1142         cfs_memory_pressure_clr();
1143         RETURN(rc);
1144 }
1145
1146 /**
1147  * Implementation of OST_SET_INFO.
1148  *
1149  * OST_SET_INFO is like ioctl(): heavily overloaded.  Specifically, it takes a
1150  * "key" and a value RPC buffers as arguments, with the value's contents
1151  * interpreted according to the key.
1152  *
1153  * Value types that need swabbing have swabbing done explicitly, either here or
1154  * in functions called from here.  This should be corrected: all swabbing should
1155  * be done in the capsule abstraction, as that will then allow us to move
1156  * swabbing exclusively to the client without having to modify server code
1157  * outside the capsule abstraction's implementation itself.  To correct this
1158  * will require minor changes to the capsule abstraction; see the comments for
1159  * req_capsule_extend() in layout.c.
1160  */
1161 static int ost_set_info(struct obd_export *exp, struct ptlrpc_request *req)
1162 {
1163         struct ost_body *body = NULL, *repbody;
1164         char *key, *val = NULL;
1165         int keylen, vallen, rc = 0;
1166         int is_grant_shrink = 0;
1167         ENTRY;
1168
1169         key = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1170         if (key == NULL) {
1171                 DEBUG_REQ(D_HA, req, "no set_info key");
1172                 RETURN(-EFAULT);
1173         }
1174         keylen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_KEY,
1175                                       RCL_CLIENT);
1176
1177         vallen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_VAL,
1178                                       RCL_CLIENT);
1179
1180         if ((is_grant_shrink = KEY_IS(KEY_GRANT_SHRINK)))
1181                 /* In this case the value is actually an RMF_OST_BODY, so we
1182                  * transmutate the type of this PTLRPC */
1183                 req_capsule_extend(&req->rq_pill, &RQF_OST_SET_GRANT_INFO);
1184
1185         rc = req_capsule_server_pack(&req->rq_pill);
1186         if (rc)
1187                 RETURN(rc);
1188
1189         if (vallen) {
1190                 if (is_grant_shrink) {
1191                         body = req_capsule_client_get(&req->rq_pill,
1192                                                       &RMF_OST_BODY);
1193                         if (!body)
1194                                 RETURN(-EFAULT);
1195
1196                         repbody = req_capsule_server_get(&req->rq_pill,
1197                                                          &RMF_OST_BODY);
1198                         memcpy(repbody, body, sizeof(*body));
1199                         val = (char*)repbody;
1200                 } else {
1201                         val = req_capsule_client_get(&req->rq_pill,
1202                                                      &RMF_SETINFO_VAL);
1203                 }
1204         }
1205
1206         if (KEY_IS(KEY_EVICT_BY_NID)) {
1207                 if (val && vallen)
1208                         obd_export_evict_by_nid(exp->exp_obd, val);
1209                 GOTO(out, rc = 0);
1210         } else if (KEY_IS(KEY_MDS_CONN) && ptlrpc_req_need_swab(req)) {
1211                 if (vallen < sizeof(__u32))
1212                         RETURN(-EFAULT);
1213                 __swab32s((__u32 *)val);
1214         }
1215
1216         /* OBD will also check if KEY_IS(KEY_GRANT_SHRINK), and will cast val to
1217          * a struct ost_body * value */
1218         rc = obd_set_info_async(req->rq_svc_thread->t_env, exp, keylen,
1219                                 key, vallen, val, NULL);
1220 out:
1221         lustre_msg_set_status(req->rq_repmsg, 0);
1222         RETURN(rc);
1223 }
1224
1225 static int ost_get_info(struct obd_export *exp, struct ptlrpc_request *req)
1226 {
1227         void *key, *reply;
1228         int keylen, replylen, rc = 0;
1229         struct req_capsule *pill = &req->rq_pill;
1230         ENTRY;
1231
1232         /* this common part for get_info rpc */
1233         key = req_capsule_client_get(pill, &RMF_SETINFO_KEY);
1234         if (key == NULL) {
1235                 DEBUG_REQ(D_HA, req, "no get_info key");
1236                 RETURN(-EFAULT);
1237         }
1238         keylen = req_capsule_get_size(pill, &RMF_SETINFO_KEY, RCL_CLIENT);
1239
1240         if (KEY_IS(KEY_FIEMAP)) {
1241                 struct ll_fiemap_info_key *fm_key = key;
1242                 int rc;
1243
1244                 rc = ost_validate_obdo(exp, &fm_key->oa, NULL);
1245                 if (rc)
1246                         RETURN(rc);
1247         }
1248
1249         rc = obd_get_info(req->rq_svc_thread->t_env, exp, keylen, key,
1250                           &replylen, NULL, NULL);
1251         if (rc)
1252                 RETURN(rc);
1253
1254         req_capsule_set_size(pill, &RMF_GENERIC_DATA,
1255                              RCL_SERVER, replylen);
1256
1257         rc = req_capsule_server_pack(pill);
1258         if (rc)
1259                 RETURN(rc);
1260
1261         reply = req_capsule_server_get(pill, &RMF_GENERIC_DATA);
1262         if (reply == NULL)
1263                 RETURN(-ENOMEM);
1264
1265         /* call again to fill in the reply buffer */
1266         rc = obd_get_info(req->rq_svc_thread->t_env, exp, keylen, key,
1267                           &replylen, reply, NULL);
1268
1269         lustre_msg_set_status(req->rq_repmsg, 0);
1270         RETURN(rc);
1271 }
1272
1273 #ifdef HAVE_QUOTA_SUPPORT
1274 static int ost_handle_quotactl(struct ptlrpc_request *req)
1275 {
1276         struct obd_quotactl *oqctl, *repoqc;
1277         int rc;
1278         ENTRY;
1279
1280         oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1281         if (oqctl == NULL)
1282                 GOTO(out, rc = -EPROTO);
1283
1284         rc = req_capsule_server_pack(&req->rq_pill);
1285         if (rc)
1286                 GOTO(out, rc);
1287
1288         repoqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1289         req->rq_status = obd_quotactl(req->rq_export, oqctl);
1290         *repoqc = *oqctl;
1291
1292 out:
1293         RETURN(rc);
1294 }
1295
1296 static int ost_handle_quotacheck(struct ptlrpc_request *req)
1297 {
1298         struct obd_quotactl *oqctl;
1299         int rc;
1300         ENTRY;
1301
1302         oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1303         if (oqctl == NULL)
1304                 RETURN(-EPROTO);
1305
1306         rc = req_capsule_server_pack(&req->rq_pill);
1307         if (rc)
1308                 RETURN(-ENOMEM);
1309
1310         req->rq_status = obd_quotacheck(req->rq_export, oqctl);
1311         RETURN(0);
1312 }
1313
1314 static int ost_handle_quota_adjust_qunit(struct ptlrpc_request *req)
1315 {
1316         struct quota_adjust_qunit *oqaq, *repoqa;
1317         struct lustre_quota_ctxt *qctxt;
1318         int rc;
1319         ENTRY;
1320
1321         qctxt = &req->rq_export->exp_obd->u.obt.obt_qctxt;
1322         oqaq = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_ADJUST_QUNIT);
1323         if (oqaq == NULL)
1324                 GOTO(out, rc = -EPROTO);
1325
1326         rc = req_capsule_server_pack(&req->rq_pill);
1327         if (rc)
1328                 GOTO(out, rc);
1329
1330         repoqa = req_capsule_server_get(&req->rq_pill, &RMF_QUOTA_ADJUST_QUNIT);
1331         req->rq_status = obd_quota_adjust_qunit(req->rq_export, oqaq, qctxt, NULL);
1332         *repoqa = *oqaq;
1333
1334  out:
1335         RETURN(rc);
1336 }
1337 #endif
1338
1339 static int ost_llog_handle_connect(struct obd_export *exp,
1340                                    struct ptlrpc_request *req)
1341 {
1342         struct llogd_conn_body *body;
1343         int rc;
1344         ENTRY;
1345
1346         body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_CONN_BODY);
1347         rc = obd_llog_connect(exp, body);
1348         RETURN(rc);
1349 }
1350
1351 #define ost_init_sec_none(reply, exp)                                   \
1352 do {                                                                    \
1353         reply->ocd_connect_flags &= ~(OBD_CONNECT_RMT_CLIENT |          \
1354                                       OBD_CONNECT_RMT_CLIENT_FORCE |    \
1355                                       OBD_CONNECT_OSS_CAPA);            \
1356         cfs_spin_lock(&exp->exp_lock);                                  \
1357         exp->exp_connect_flags = reply->ocd_connect_flags;              \
1358         cfs_spin_unlock(&exp->exp_lock);                                \
1359 } while (0)
1360
1361 static int ost_init_sec_level(struct ptlrpc_request *req)
1362 {
1363         struct obd_export *exp = req->rq_export;
1364         struct req_capsule *pill = &req->rq_pill;
1365         struct obd_device *obd = exp->exp_obd;
1366         struct filter_obd *filter = &obd->u.filter;
1367         char *client = libcfs_nid2str(req->rq_peer.nid);
1368         struct obd_connect_data *data, *reply;
1369         int rc = 0, remote;
1370         ENTRY;
1371
1372         data = req_capsule_client_get(pill, &RMF_CONNECT_DATA);
1373         reply = req_capsule_server_get(pill, &RMF_CONNECT_DATA);
1374         if (data == NULL || reply == NULL)
1375                 RETURN(-EFAULT);
1376
1377         /* connection from MDT is always trusted */
1378         if (req->rq_auth_usr_mdt) {
1379                 ost_init_sec_none(reply, exp);
1380                 RETURN(0);
1381         }
1382
1383         /* no GSS support case */
1384         if (!req->rq_auth_gss) {
1385                 if (filter->fo_sec_level > LUSTRE_SEC_NONE) {
1386                         CWARN("client %s -> target %s does not user GSS, "
1387                               "can not run under security level %d.\n",
1388                               client, obd->obd_name, filter->fo_sec_level);
1389                         RETURN(-EACCES);
1390                 } else {
1391                         ost_init_sec_none(reply, exp);
1392                         RETURN(0);
1393                 }
1394         }
1395
1396         /* old version case */
1397         if (unlikely(!(data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) ||
1398                      !(data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA))) {
1399                 if (filter->fo_sec_level > LUSTRE_SEC_NONE) {
1400                         CWARN("client %s -> target %s uses old version, "
1401                               "can not run under security level %d.\n",
1402                               client, obd->obd_name, filter->fo_sec_level);
1403                         RETURN(-EACCES);
1404                 } else {
1405                         CWARN("client %s -> target %s uses old version, "
1406                               "run under security level %d.\n",
1407                               client, obd->obd_name, filter->fo_sec_level);
1408                         ost_init_sec_none(reply, exp);
1409                         RETURN(0);
1410                 }
1411         }
1412
1413         remote = data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT_FORCE;
1414         if (remote) {
1415                 if (!req->rq_auth_remote)
1416                         CDEBUG(D_SEC, "client (local realm) %s -> target %s "
1417                                "asked to be remote.\n", client, obd->obd_name);
1418         } else if (req->rq_auth_remote) {
1419                 remote = 1;
1420                 CDEBUG(D_SEC, "client (remote realm) %s -> target %s is set "
1421                        "as remote by default.\n", client, obd->obd_name);
1422         }
1423
1424         if (remote) {
1425                 if (!filter->fo_fl_oss_capa) {
1426                         CDEBUG(D_SEC, "client %s -> target %s is set as remote,"
1427                                " but OSS capabilities are not enabled: %d.\n",
1428                                client, obd->obd_name, filter->fo_fl_oss_capa);
1429                         RETURN(-EACCES);
1430                 }
1431         }
1432
1433         switch (filter->fo_sec_level) {
1434         case LUSTRE_SEC_NONE:
1435                 if (!remote) {
1436                         ost_init_sec_none(reply, exp);
1437                         break;
1438                 } else {
1439                         CDEBUG(D_SEC, "client %s -> target %s is set as remote, "
1440                                "can not run under security level %d.\n",
1441                                client, obd->obd_name, filter->fo_sec_level);
1442                         RETURN(-EACCES);
1443                 }
1444         case LUSTRE_SEC_REMOTE:
1445                 if (!remote)
1446                         ost_init_sec_none(reply, exp);
1447                 break;
1448         case LUSTRE_SEC_ALL:
1449                 if (!remote) {
1450                         reply->ocd_connect_flags &= ~(OBD_CONNECT_RMT_CLIENT |
1451                                                       OBD_CONNECT_RMT_CLIENT_FORCE);
1452                         if (!filter->fo_fl_oss_capa)
1453                                 reply->ocd_connect_flags &= ~OBD_CONNECT_OSS_CAPA;
1454
1455                         cfs_spin_lock(&exp->exp_lock);
1456                         exp->exp_connect_flags = reply->ocd_connect_flags;
1457                         cfs_spin_unlock(&exp->exp_lock);
1458                 }
1459                 break;
1460         default:
1461                 RETURN(-EINVAL);
1462         }
1463
1464         RETURN(rc);
1465 }
1466
1467 /*
1468  * FIXME
1469  * this should be done in filter_connect()/filter_reconnect(), but
1470  * we can't obtain information like NID, which stored in incoming
1471  * request, thus can't decide what flavor to use. so we do it here.
1472  *
1473  * This hack should be removed after the OST stack be rewritten, just
1474  * like what we are doing in mdt_obd_connect()/mdt_obd_reconnect().
1475  */
1476 static int ost_connect_check_sptlrpc(struct ptlrpc_request *req)
1477 {
1478         struct obd_export     *exp = req->rq_export;
1479         struct filter_obd     *filter = &exp->exp_obd->u.filter;
1480         struct sptlrpc_flavor  flvr;
1481         int                    rc = 0;
1482
1483         if (unlikely(strcmp(exp->exp_obd->obd_type->typ_name,
1484                             LUSTRE_ECHO_NAME) == 0)) {
1485                 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
1486                 return 0;
1487         }
1488
1489         if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
1490                 cfs_read_lock(&filter->fo_sptlrpc_lock);
1491                 sptlrpc_target_choose_flavor(&filter->fo_sptlrpc_rset,
1492                                              req->rq_sp_from,
1493                                              req->rq_peer.nid,
1494                                              &flvr);
1495                 cfs_read_unlock(&filter->fo_sptlrpc_lock);
1496
1497                 cfs_spin_lock(&exp->exp_lock);
1498
1499                 exp->exp_sp_peer = req->rq_sp_from;
1500                 exp->exp_flvr = flvr;
1501
1502                 if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
1503                     exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
1504                         CERROR("unauthorized rpc flavor %x from %s, "
1505                                "expect %x\n", req->rq_flvr.sf_rpc,
1506                                libcfs_nid2str(req->rq_peer.nid),
1507                                exp->exp_flvr.sf_rpc);
1508                         rc = -EACCES;
1509                 }
1510
1511                 cfs_spin_unlock(&exp->exp_lock);
1512         } else {
1513                 if (exp->exp_sp_peer != req->rq_sp_from) {
1514                         CERROR("RPC source %s doesn't match %s\n",
1515                                sptlrpc_part2name(req->rq_sp_from),
1516                                sptlrpc_part2name(exp->exp_sp_peer));
1517                         rc = -EACCES;
1518                 } else {
1519                         rc = sptlrpc_target_export_check(exp, req);
1520                 }
1521         }
1522
1523         return rc;
1524 }
1525
1526 /* Ensure that data and metadata are synced to the disk when lock is cancelled
1527  * (if requested) */
1528 int ost_blocking_ast(struct ldlm_lock *lock,
1529                              struct ldlm_lock_desc *desc,
1530                              void *data, int flag)
1531 {
1532         __u32 sync_lock_cancel = 0;
1533         __u32 len = sizeof(sync_lock_cancel);
1534         int rc = 0;
1535         ENTRY;
1536
1537         rc = obd_get_info(NULL, lock->l_export, sizeof(KEY_SYNC_LOCK_CANCEL),
1538                           KEY_SYNC_LOCK_CANCEL, &len, &sync_lock_cancel, NULL);
1539
1540         if (!rc && flag == LDLM_CB_CANCELING &&
1541             (lock->l_granted_mode & (LCK_PW|LCK_GROUP)) &&
1542             (sync_lock_cancel == ALWAYS_SYNC_ON_CANCEL ||
1543              (sync_lock_cancel == BLOCKING_SYNC_ON_CANCEL &&
1544               lock->l_flags & LDLM_FL_CBPENDING))) {
1545                 struct obd_info *oinfo;
1546                 struct obdo *oa;
1547                 int rc;
1548
1549                 OBD_ALLOC_PTR(oinfo);
1550                 if (!oinfo)
1551                         RETURN(-ENOMEM);
1552                 OBDO_ALLOC(oa);
1553                 if (!oa) {
1554                         OBD_FREE_PTR(oinfo);
1555                         RETURN(-ENOMEM);
1556                 }
1557                 oa->o_id = lock->l_resource->lr_name.name[0];
1558                 oa->o_seq = lock->l_resource->lr_name.name[1];
1559                 oa->o_valid = OBD_MD_FLID|OBD_MD_FLGROUP;
1560                 oinfo->oi_oa = oa;
1561
1562                 rc = obd_sync(NULL, lock->l_export, oinfo,
1563                               lock->l_policy_data.l_extent.start,
1564                               lock->l_policy_data.l_extent.end, NULL);
1565                 if (rc)
1566                         CERROR("Error %d syncing data on lock cancel\n", rc);
1567
1568                 OBDO_FREE(oa);
1569                 OBD_FREE_PTR(oinfo);
1570         }
1571
1572         rc = ldlm_server_blocking_ast(lock, desc, data, flag);
1573         RETURN(rc);
1574 }
1575
1576 static int ost_filter_recovery_request(struct ptlrpc_request *req,
1577                                        struct obd_device *obd, int *process)
1578 {
1579         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1580         case OST_CONNECT: /* This will never get here, but for completeness. */
1581         case OST_DISCONNECT:
1582                *process = 1;
1583                RETURN(0);
1584
1585         case OBD_PING:
1586         case OST_CREATE:
1587         case OST_DESTROY:
1588         case OST_PUNCH:
1589         case OST_SETATTR:
1590         case OST_SYNC:
1591         case OST_WRITE:
1592         case OBD_LOG_CANCEL:
1593         case LDLM_ENQUEUE:
1594                 *process = target_queue_recovery_request(req, obd);
1595                 RETURN(0);
1596
1597         default:
1598                 DEBUG_REQ(D_WARNING, req, "not permitted during recovery");
1599                 *process = -EAGAIN;
1600                 RETURN(0);
1601         }
1602 }
1603
1604 int ost_msg_check_version(struct lustre_msg *msg)
1605 {
1606         int rc;
1607
1608         switch(lustre_msg_get_opc(msg)) {
1609         case OST_CONNECT:
1610         case OST_DISCONNECT:
1611         case OBD_PING:
1612         case SEC_CTX_INIT:
1613         case SEC_CTX_INIT_CONT:
1614         case SEC_CTX_FINI:
1615                 rc = lustre_msg_check_version(msg, LUSTRE_OBD_VERSION);
1616                 if (rc)
1617                         CERROR("bad opc %u version %08x, expecting %08x\n",
1618                                lustre_msg_get_opc(msg),
1619                                lustre_msg_get_version(msg),
1620                                LUSTRE_OBD_VERSION);
1621                 break;
1622         case OST_CREATE:
1623         case OST_DESTROY:
1624         case OST_GETATTR:
1625         case OST_SETATTR:
1626         case OST_WRITE:
1627         case OST_READ:
1628         case OST_PUNCH:
1629         case OST_STATFS:
1630         case OST_SYNC:
1631         case OST_SET_INFO:
1632         case OST_GET_INFO:
1633 #ifdef HAVE_QUOTA_SUPPORT
1634         case OST_QUOTACHECK:
1635         case OST_QUOTACTL:
1636         case OST_QUOTA_ADJUST_QUNIT:
1637 #endif
1638                 rc = lustre_msg_check_version(msg, LUSTRE_OST_VERSION);
1639                 if (rc)
1640                         CERROR("bad opc %u version %08x, expecting %08x\n",
1641                                lustre_msg_get_opc(msg),
1642                                lustre_msg_get_version(msg),
1643                                LUSTRE_OST_VERSION);
1644                 break;
1645         case LDLM_ENQUEUE:
1646         case LDLM_CONVERT:
1647         case LDLM_CANCEL:
1648         case LDLM_BL_CALLBACK:
1649         case LDLM_CP_CALLBACK:
1650                 rc = lustre_msg_check_version(msg, LUSTRE_DLM_VERSION);
1651                 if (rc)
1652                         CERROR("bad opc %u version %08x, expecting %08x\n",
1653                                lustre_msg_get_opc(msg),
1654                                lustre_msg_get_version(msg),
1655                                LUSTRE_DLM_VERSION);
1656                 break;
1657         case LLOG_ORIGIN_CONNECT:
1658         case OBD_LOG_CANCEL:
1659                 rc = lustre_msg_check_version(msg, LUSTRE_LOG_VERSION);
1660                 if (rc)
1661                         CERROR("bad opc %u version %08x, expecting %08x\n",
1662                                lustre_msg_get_opc(msg),
1663                                lustre_msg_get_version(msg),
1664                                LUSTRE_LOG_VERSION);
1665                 break;
1666         default:
1667                 CERROR("Unexpected opcode %d\n", lustre_msg_get_opc(msg));
1668                 rc = -ENOTSUPP;
1669         }
1670         return rc;
1671 }
1672
1673 struct ost_prolong_data {
1674         struct ptlrpc_request *opd_req;
1675         struct obd_export     *opd_exp;
1676         struct obdo           *opd_oa;
1677         struct ldlm_res_id     opd_resid;
1678         struct ldlm_extent     opd_extent;
1679         ldlm_mode_t            opd_mode;
1680         unsigned int           opd_locks;
1681         int                    opd_timeout;
1682 };
1683
1684 /* prolong locks for the current service time of the corresponding
1685  * portal (= OST_IO_PORTAL)
1686  */
1687 static inline int prolong_timeout(struct ptlrpc_request *req)
1688 {
1689         struct ptlrpc_service *svc = req->rq_rqbd->rqbd_service;
1690
1691         if (AT_OFF)
1692                 return obd_timeout / 2;
1693
1694         return max(at_est2timeout(at_get(&svc->srv_at_estimate)), ldlm_timeout);
1695 }
1696
1697 static void ost_prolong_lock_one(struct ost_prolong_data *opd,
1698                                  struct ldlm_lock *lock)
1699 {
1700         LASSERT(lock->l_req_mode == lock->l_granted_mode);
1701         LASSERT(lock->l_export == opd->opd_exp);
1702
1703         /* XXX: never try to grab resource lock here because we're inside
1704          * exp_bl_list_lock; in ldlm_lockd.c to handle waiting list we take
1705          * res lock and then exp_bl_list_lock. */
1706
1707         if (!(lock->l_flags & LDLM_FL_AST_SENT))
1708                 /* ignore locks not being cancelled */
1709                 return;
1710
1711         LDLM_DEBUG(lock,
1712                    "refreshed for req x"LPU64" ext("LPU64"->"LPU64") to %ds.\n",
1713                    opd->opd_req->rq_xid, opd->opd_extent.start,
1714                    opd->opd_extent.end, opd->opd_timeout);
1715
1716         /* OK. this is a possible lock the user holds doing I/O
1717          * let's refresh eviction timer for it */
1718         ldlm_refresh_waiting_lock(lock, opd->opd_timeout);
1719         ++opd->opd_locks;
1720 }
1721
1722 static void ost_prolong_locks(struct ost_prolong_data *data)
1723 {
1724         struct obd_export *exp = data->opd_exp;
1725         struct obdo       *oa  = data->opd_oa;
1726         struct ldlm_lock  *lock;
1727         ENTRY;
1728
1729         if (oa->o_valid & OBD_MD_FLHANDLE) {
1730                 /* mostly a request should be covered by only one lock, try
1731                  * fast path. */
1732                 lock = ldlm_handle2lock(&oa->o_handle);
1733                 if (lock != NULL) {
1734                         /* Fast path to check if the lock covers the whole IO
1735                          * region exclusively. */
1736                         if (lock->l_granted_mode == LCK_PW &&
1737                             ldlm_extent_contain(&lock->l_policy_data.l_extent,
1738                                                 &data->opd_extent)) {
1739                                 /* bingo */
1740                                 ost_prolong_lock_one(data, lock);
1741                                 LDLM_LOCK_PUT(lock);
1742                                 RETURN_EXIT;
1743                         }
1744                         LDLM_LOCK_PUT(lock);
1745                 }
1746         }
1747
1748
1749         cfs_spin_lock_bh(&exp->exp_bl_list_lock);
1750         cfs_list_for_each_entry(lock, &exp->exp_bl_list, l_exp_list) {
1751                 LASSERT(lock->l_flags & LDLM_FL_AST_SENT);
1752                 LASSERT(lock->l_resource->lr_type == LDLM_EXTENT);
1753
1754                 if (!ldlm_res_eq(&data->opd_resid, &lock->l_resource->lr_name))
1755                         continue;
1756
1757                 if (!ldlm_extent_overlap(&lock->l_policy_data.l_extent,
1758                                          &data->opd_extent))
1759                         continue;
1760
1761                 ost_prolong_lock_one(data, lock);
1762         }
1763         cfs_spin_unlock_bh(&exp->exp_bl_list_lock);
1764
1765         EXIT;
1766 }
1767
1768 /**
1769  * Returns 1 if the given PTLRPC matches the given LDLM locks, or 0 if it does
1770  * not.
1771  */
1772 static int ost_rw_hpreq_lock_match(struct ptlrpc_request *req,
1773                                    struct ldlm_lock *lock)
1774 {
1775         struct niobuf_remote *nb;
1776         struct obd_ioobj *ioo;
1777         int mode, opc;
1778         struct ldlm_extent ext;
1779         ENTRY;
1780
1781         opc = lustre_msg_get_opc(req->rq_reqmsg);
1782         LASSERT(opc == OST_READ || opc == OST_WRITE);
1783
1784         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
1785         LASSERT(ioo != NULL);
1786
1787         nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
1788         LASSERT(nb != NULL);
1789
1790         ext.start = nb->offset;
1791         nb += ioo->ioo_bufcnt - 1;
1792         ext.end = nb->offset + nb->len - 1;
1793
1794         LASSERT(lock->l_resource != NULL);
1795         if (!osc_res_name_eq(ioo->ioo_id, ioo->ioo_seq,
1796                              &lock->l_resource->lr_name))
1797                 RETURN(0);
1798
1799         mode = LCK_PW;
1800         if (opc == OST_READ)
1801                 mode |= LCK_PR;
1802         if (!(lock->l_granted_mode & mode))
1803                 RETURN(0);
1804
1805         RETURN(ldlm_extent_overlap(&lock->l_policy_data.l_extent, &ext));
1806 }
1807
1808 /**
1809  * High-priority queue request check for whether the given PTLRPC request (\a
1810  * req) is blocking an LDLM lock cancel.
1811  *
1812  * Returns 1 if the given given PTLRPC request (\a req) is blocking an LDLM lock
1813  * cancel, 0 if it is not, and -EFAULT if the request is malformed.
1814  *
1815  * Only OST_READs, OST_WRITEs and OST_PUNCHes go on the h-p RPC queue.  This
1816  * function looks only at OST_READs and OST_WRITEs.
1817  */
1818 static int ost_rw_hpreq_check(struct ptlrpc_request *req)
1819 {
1820         struct obd_device *obd = req->rq_export->exp_obd;
1821         struct ost_body *body;
1822         struct obd_ioobj *ioo;
1823         struct niobuf_remote *nb;
1824         struct ost_prolong_data opd = { 0 };
1825         int mode, opc;
1826         ENTRY;
1827
1828         /*
1829          * Use LASSERT to do sanity check because malformed RPCs should have
1830          * been filtered out in ost_hpreq_handler().
1831          */
1832         opc = lustre_msg_get_opc(req->rq_reqmsg);
1833         LASSERT(opc == OST_READ || opc == OST_WRITE);
1834
1835         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
1836         LASSERT(body != NULL);
1837
1838         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
1839         LASSERT(ioo != NULL);
1840
1841         nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
1842         LASSERT(nb != NULL);
1843         LASSERT(!(nb->flags & OBD_BRW_SRVLOCK));
1844
1845         osc_build_res_name(ioo->ioo_id, ioo->ioo_seq, &opd.opd_resid);
1846
1847         opd.opd_req = req;
1848         mode = LCK_PW;
1849         if (opc == OST_READ)
1850                 mode |= LCK_PR;
1851         opd.opd_mode = mode;
1852         opd.opd_exp = req->rq_export;
1853         opd.opd_oa  = &body->oa;
1854         opd.opd_extent.start = nb->offset;
1855         nb += ioo->ioo_bufcnt - 1;
1856         opd.opd_extent.end = nb->offset + nb->len - 1;
1857         opd.opd_timeout = prolong_timeout(req);
1858
1859         DEBUG_REQ(D_RPCTRACE, req,
1860                "%s %s: refresh rw locks: " LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
1861                obd->obd_name, cfs_current()->comm,
1862                opd.opd_resid.name[0], opd.opd_resid.name[1],
1863                opd.opd_extent.start, opd.opd_extent.end);
1864
1865         ost_prolong_locks(&opd);
1866
1867         CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
1868                obd->obd_name, opd.opd_locks, req);
1869
1870         RETURN(opd.opd_locks);
1871 }
1872
1873 static void ost_rw_hpreq_fini(struct ptlrpc_request *req)
1874 {
1875         (void)ost_rw_hpreq_check(req);
1876 }
1877
1878 /**
1879  * Like ost_rw_hpreq_lock_match(), but for OST_PUNCH RPCs.
1880  */
1881 static int ost_punch_hpreq_lock_match(struct ptlrpc_request *req,
1882                                       struct ldlm_lock *lock)
1883 {
1884         struct ost_body *body;
1885         ENTRY;
1886
1887         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
1888         LASSERT(body != NULL);
1889
1890         if (body->oa.o_valid & OBD_MD_FLHANDLE &&
1891             body->oa.o_handle.cookie == lock->l_handle.h_cookie)
1892                 RETURN(1);
1893
1894         RETURN(0);
1895 }
1896
1897 /**
1898  * Like ost_rw_hpreq_check(), but for OST_PUNCH RPCs.
1899  */
1900 static int ost_punch_hpreq_check(struct ptlrpc_request *req)
1901 {
1902         struct obd_device *obd = req->rq_export->exp_obd;
1903         struct ost_body *body;
1904         struct obdo *oa;
1905         struct ost_prolong_data opd = { 0 };
1906         __u64 start, end;
1907         ENTRY;
1908
1909         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
1910         LASSERT(body != NULL);
1911
1912         oa = &body->oa;
1913         LASSERT(!(oa->o_valid & OBD_MD_FLFLAGS) ||
1914                 !(oa->o_flags & OBD_FL_SRVLOCK));
1915
1916         start = oa->o_size;
1917         end = start + oa->o_blocks;
1918
1919         opd.opd_req = req;
1920         opd.opd_mode = LCK_PW;
1921         opd.opd_exp = req->rq_export;
1922         opd.opd_oa  = oa;
1923         opd.opd_extent.start = start;
1924         opd.opd_extent.end   = end;
1925         if (oa->o_blocks == OBD_OBJECT_EOF)
1926                 opd.opd_extent.end = OBD_OBJECT_EOF;
1927         opd.opd_timeout = prolong_timeout(req);
1928
1929         osc_build_res_name(oa->o_id, oa->o_seq, &opd.opd_resid);
1930
1931         CDEBUG(D_DLMTRACE,
1932                "%s: refresh locks: "LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
1933                obd->obd_name,
1934                opd.opd_resid.name[0], opd.opd_resid.name[1],
1935                opd.opd_extent.start, opd.opd_extent.end);
1936
1937         ost_prolong_locks(&opd);
1938
1939         CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
1940                obd->obd_name, opd.opd_locks, req);
1941
1942         RETURN(opd.opd_locks > 0);
1943 }
1944
1945 static void ost_punch_hpreq_fini(struct ptlrpc_request *req)
1946 {
1947         (void)ost_punch_hpreq_check(req);
1948 }
1949
1950 struct ptlrpc_hpreq_ops ost_hpreq_rw = {
1951         .hpreq_lock_match = ost_rw_hpreq_lock_match,
1952         .hpreq_check      = ost_rw_hpreq_check,
1953         .hpreq_fini       = ost_rw_hpreq_fini
1954 };
1955
1956 struct ptlrpc_hpreq_ops ost_hpreq_punch = {
1957         .hpreq_lock_match = ost_punch_hpreq_lock_match,
1958         .hpreq_check      = ost_punch_hpreq_check,
1959         .hpreq_fini       = ost_punch_hpreq_fini
1960 };
1961
1962 /** Assign high priority operations to the request if needed. */
1963 static int ost_hpreq_handler(struct ptlrpc_request *req)
1964 {
1965         ENTRY;
1966         if (req->rq_export) {
1967                 int opc = lustre_msg_get_opc(req->rq_reqmsg);
1968                 struct ost_body *body;
1969
1970                 if (opc == OST_READ || opc == OST_WRITE) {
1971                         struct niobuf_remote *nb;
1972                         struct obd_ioobj *ioo;
1973                         int objcount, niocount;
1974                         int rc;
1975                         int i;
1976
1977                         /* RPCs on the H-P queue can be inspected before
1978                          * ost_handler() initializes their pills, so we
1979                          * initialize that here.  Capsule initialization is
1980                          * idempotent, as is setting the pill's format (provided
1981                          * it doesn't change).
1982                          */
1983                         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
1984                         if (opc == OST_READ)
1985                                 req_capsule_set(&req->rq_pill,
1986                                                 &RQF_OST_BRW_READ);
1987                         else
1988                                 req_capsule_set(&req->rq_pill,
1989                                                 &RQF_OST_BRW_WRITE);
1990
1991                         body = req_capsule_client_get(&req->rq_pill,
1992                                                       &RMF_OST_BODY);
1993                         if (body == NULL) {
1994                                 CERROR("Missing/short ost_body\n");
1995                                 RETURN(-EFAULT);
1996                         }
1997
1998                         objcount = req_capsule_get_size(&req->rq_pill,
1999                                                         &RMF_OBD_IOOBJ,
2000                                                         RCL_CLIENT) /
2001                                                         sizeof(*ioo);
2002                         if (objcount == 0) {
2003                                 CERROR("Missing/short ioobj\n");
2004                                 RETURN(-EFAULT);
2005                         }
2006                         if (objcount > 1) {
2007                                 CERROR("too many ioobjs (%d)\n", objcount);
2008                                 RETURN(-EFAULT);
2009                         }
2010
2011                         ioo = req_capsule_client_get(&req->rq_pill,
2012                                                      &RMF_OBD_IOOBJ);
2013                         if (ioo == NULL) {
2014                                 CERROR("Missing/short ioobj\n");
2015                                 RETURN(-EFAULT);
2016                         }
2017
2018                         rc = ost_validate_obdo(req->rq_export, &body->oa, ioo);
2019                         if (rc) {
2020                                 CERROR("invalid object ids\n");
2021                                 RETURN(rc);
2022                         }
2023
2024                         for (niocount = i = 0; i < objcount; i++) {
2025                                 if (ioo[i].ioo_bufcnt == 0) {
2026                                         CERROR("ioo[%d] has zero bufcnt\n", i);
2027                                         RETURN(-EFAULT);
2028                                 }
2029                                 niocount += ioo[i].ioo_bufcnt;
2030                         }
2031                         if (niocount > PTLRPC_MAX_BRW_PAGES) {
2032                                 DEBUG_REQ(D_RPCTRACE, req,
2033                                           "bulk has too many pages (%d)",
2034                                           niocount);
2035                                 RETURN(-EFAULT);
2036                         }
2037
2038                         nb = req_capsule_client_get(&req->rq_pill,
2039                                                     &RMF_NIOBUF_REMOTE);
2040                         if (nb == NULL) {
2041                                 CERROR("Missing/short niobuf\n");
2042                                 RETURN(-EFAULT);
2043                         }
2044
2045                         if (niocount == 0 || !(nb[0].flags & OBD_BRW_SRVLOCK))
2046                                 req->rq_ops = &ost_hpreq_rw;
2047                 } else if (opc == OST_PUNCH) {
2048                         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2049                         req_capsule_set(&req->rq_pill, &RQF_OST_PUNCH);
2050
2051                         body = req_capsule_client_get(&req->rq_pill,
2052                                                       &RMF_OST_BODY);
2053                         if (body == NULL) {
2054                                 CERROR("Missing/short ost_body\n");
2055                                 RETURN(-EFAULT);
2056                         }
2057
2058                         if (!(body->oa.o_valid & OBD_MD_FLFLAGS) ||
2059                             !(body->oa.o_flags & OBD_FL_SRVLOCK))
2060                                 req->rq_ops = &ost_hpreq_punch;
2061                 }
2062         }
2063         RETURN(0);
2064 }
2065
2066 /* TODO: handle requests in a similar way as MDT: see mdt_handle_common() */
2067 int ost_handle(struct ptlrpc_request *req)
2068 {
2069         struct obd_trans_info trans_info = { 0, };
2070         struct obd_trans_info *oti = &trans_info;
2071         int should_process, fail = OBD_FAIL_OST_ALL_REPLY_NET, rc = 0;
2072         struct obd_device *obd = NULL;
2073         ENTRY;
2074
2075         /* OST module is kept between remounts, but the last reference
2076          * to specific module (say, osd or ofd) kills all related keys
2077          * from the environment. so we have to refill it until the root
2078          * cause is fixed properly */
2079         lu_env_refill(req->rq_svc_thread->t_env);
2080
2081         LASSERT(current->journal_info == NULL);
2082
2083         /* primordial rpcs don't affect server recovery */
2084         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2085         case SEC_CTX_INIT:
2086         case SEC_CTX_INIT_CONT:
2087         case SEC_CTX_FINI:
2088                 GOTO(out, rc = 0);
2089         }
2090
2091         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2092
2093         if (lustre_msg_get_opc(req->rq_reqmsg) != OST_CONNECT) {
2094                 if (!class_connected_export(req->rq_export)) {
2095                         CDEBUG(D_HA,"operation %d on unconnected OST from %s\n",
2096                                lustre_msg_get_opc(req->rq_reqmsg),
2097                                libcfs_id2str(req->rq_peer));
2098                         req->rq_status = -ENOTCONN;
2099                         GOTO(out, rc = -ENOTCONN);
2100                 }
2101
2102                 obd = req->rq_export->exp_obd;
2103
2104                 /* Check for aborted recovery. */
2105                 if (obd->obd_recovering) {
2106                         rc = ost_filter_recovery_request(req, obd,
2107                                                          &should_process);
2108                         if (rc || !should_process)
2109                                 RETURN(rc);
2110                         else if (should_process < 0) {
2111                                 req->rq_status = should_process;
2112                                 rc = ptlrpc_error(req);
2113                                 RETURN(rc);
2114                         }
2115                 }
2116         }
2117
2118         oti_init(oti, req);
2119
2120         rc = ost_msg_check_version(req->rq_reqmsg);
2121         if (rc)
2122                 RETURN(rc);
2123
2124         if (req && req->rq_reqmsg && req->rq_export &&
2125             (req->rq_export->exp_connect_flags & OBD_CONNECT_JOBSTATS))
2126                 oti->oti_jobid = lustre_msg_get_jobid(req->rq_reqmsg);
2127
2128         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2129         case OST_CONNECT: {
2130                 CDEBUG(D_INODE, "connect\n");
2131                 req_capsule_set(&req->rq_pill, &RQF_OST_CONNECT);
2132                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_CONNECT_NET))
2133                         RETURN(0);
2134                 rc = target_handle_connect(req);
2135                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_CONNECT_NET2))
2136                         RETURN(0);
2137                 if (!rc) {
2138                         rc = ost_init_sec_level(req);
2139                         if (!rc)
2140                                 rc = ost_connect_check_sptlrpc(req);
2141                 }
2142                 break;
2143         }
2144         case OST_DISCONNECT:
2145                 CDEBUG(D_INODE, "disconnect\n");
2146                 req_capsule_set(&req->rq_pill, &RQF_OST_DISCONNECT);
2147                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_DISCONNECT_NET))
2148                         RETURN(0);
2149                 rc = target_handle_disconnect(req);
2150                 break;
2151         case OST_CREATE:
2152                 CDEBUG(D_INODE, "create\n");
2153                 req_capsule_set(&req->rq_pill, &RQF_OST_CREATE);
2154                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_CREATE_NET))
2155                         RETURN(0);
2156                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
2157                         GOTO(out, rc = -EROFS);
2158                 rc = ost_create(req->rq_export, req, oti);
2159                 break;
2160         case OST_DESTROY:
2161                 CDEBUG(D_INODE, "destroy\n");
2162                 req_capsule_set(&req->rq_pill, &RQF_OST_DESTROY);
2163                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_DESTROY_NET))
2164                         RETURN(0);
2165                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
2166                         GOTO(out, rc = -EROFS);
2167                 rc = ost_destroy(req->rq_export, req, oti);
2168                 break;
2169         case OST_GETATTR:
2170                 CDEBUG(D_INODE, "getattr\n");
2171                 req_capsule_set(&req->rq_pill, &RQF_OST_GETATTR);
2172                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_GETATTR_NET))
2173                         RETURN(0);
2174                 rc = ost_getattr(req->rq_export, req);
2175                 break;
2176         case OST_SETATTR:
2177                 CDEBUG(D_INODE, "setattr\n");
2178                 req_capsule_set(&req->rq_pill, &RQF_OST_SETATTR);
2179                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_SETATTR_NET))
2180                         RETURN(0);
2181                 rc = ost_setattr(req->rq_export, req, oti);
2182                 break;
2183         case OST_WRITE:
2184                 req_capsule_set(&req->rq_pill, &RQF_OST_BRW_WRITE);
2185                 CDEBUG(D_INODE, "write\n");
2186                 /* req->rq_request_portal would be nice, if it was set */
2187                 if (req->rq_rqbd->rqbd_service->srv_req_portal !=OST_IO_PORTAL){
2188                         CERROR("%s: deny write request from %s to portal %u\n",
2189                                req->rq_export->exp_obd->obd_name,
2190                                obd_export_nid2str(req->rq_export),
2191                                req->rq_rqbd->rqbd_service->srv_req_portal);
2192                         GOTO(out, rc = -EPROTO);
2193                 }
2194                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_NET))
2195                         RETURN(0);
2196                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOSPC))
2197                         GOTO(out, rc = -ENOSPC);
2198                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
2199                         GOTO(out, rc = -EROFS);
2200                 rc = ost_brw_write(req, oti);
2201                 LASSERT(current->journal_info == NULL);
2202                 /* ost_brw_write sends its own replies */
2203                 RETURN(rc);
2204         case OST_READ:
2205                 req_capsule_set(&req->rq_pill, &RQF_OST_BRW_READ);
2206                 CDEBUG(D_INODE, "read\n");
2207                 /* req->rq_request_portal would be nice, if it was set */
2208                 if (req->rq_rqbd->rqbd_service->srv_req_portal !=OST_IO_PORTAL){
2209                         CERROR("%s: deny read request from %s to portal %u\n",
2210                                req->rq_export->exp_obd->obd_name,
2211                                obd_export_nid2str(req->rq_export),
2212                                req->rq_rqbd->rqbd_service->srv_req_portal);
2213                         GOTO(out, rc = -EPROTO);
2214                 }
2215                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_NET))
2216                         RETURN(0);
2217                 rc = ost_brw_read(req, oti);
2218                 LASSERT(current->journal_info == NULL);
2219                 /* ost_brw_read sends its own replies */
2220                 RETURN(rc);
2221         case OST_PUNCH:
2222                 CDEBUG(D_INODE, "punch\n");
2223                 req_capsule_set(&req->rq_pill, &RQF_OST_PUNCH);
2224                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_PUNCH_NET))
2225                         RETURN(0);
2226                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
2227                         GOTO(out, rc = -EROFS);
2228                 rc = ost_punch(req->rq_export, req, oti);
2229                 break;
2230         case OST_STATFS:
2231                 CDEBUG(D_INODE, "statfs\n");
2232                 req_capsule_set(&req->rq_pill, &RQF_OST_STATFS);
2233                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_STATFS_NET))
2234                         RETURN(0);
2235                 rc = ost_statfs(req);
2236                 break;
2237         case OST_SYNC:
2238                 CDEBUG(D_INODE, "sync\n");
2239                 req_capsule_set(&req->rq_pill, &RQF_OST_SYNC);
2240                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_SYNC_NET))
2241                         RETURN(0);
2242                 rc = ost_sync(req->rq_export, req, oti);
2243                 break;
2244         case OST_SET_INFO:
2245                 DEBUG_REQ(D_INODE, req, "set_info");
2246                 req_capsule_set(&req->rq_pill, &RQF_OBD_SET_INFO);
2247                 rc = ost_set_info(req->rq_export, req);
2248                 break;
2249         case OST_GET_INFO:
2250                 DEBUG_REQ(D_INODE, req, "get_info");
2251                 req_capsule_set(&req->rq_pill, &RQF_OST_GET_INFO_GENERIC);
2252                 rc = ost_get_info(req->rq_export, req);
2253                 break;
2254 #ifdef HAVE_QUOTA_SUPPORT
2255         case OST_QUOTACHECK:
2256                 CDEBUG(D_INODE, "quotacheck\n");
2257                 req_capsule_set(&req->rq_pill, &RQF_OST_QUOTACHECK);
2258                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_QUOTACHECK_NET))
2259                         RETURN(0);
2260                 rc = ost_handle_quotacheck(req);
2261                 break;
2262         case OST_QUOTACTL:
2263                 CDEBUG(D_INODE, "quotactl\n");
2264                 req_capsule_set(&req->rq_pill, &RQF_OST_QUOTACTL);
2265                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_QUOTACTL_NET))
2266                         RETURN(0);
2267                 rc = ost_handle_quotactl(req);
2268                 break;
2269         case OST_QUOTA_ADJUST_QUNIT:
2270                 CDEBUG(D_INODE, "quota_adjust_qunit\n");
2271                 req_capsule_set(&req->rq_pill, &RQF_OST_QUOTA_ADJUST_QUNIT);
2272                 rc = ost_handle_quota_adjust_qunit(req);
2273                 break;
2274 #endif
2275         case OBD_PING:
2276                 DEBUG_REQ(D_INODE, req, "ping");
2277                 req_capsule_set(&req->rq_pill, &RQF_OBD_PING);
2278                 rc = target_handle_ping(req);
2279                 break;
2280         /* FIXME - just reply status */
2281         case LLOG_ORIGIN_CONNECT:
2282                 DEBUG_REQ(D_INODE, req, "log connect");
2283                 req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_CONNECT);
2284                 rc = ost_llog_handle_connect(req->rq_export, req);
2285                 req->rq_status = rc;
2286                 rc = req_capsule_server_pack(&req->rq_pill);
2287                 if (rc)
2288                         RETURN(rc);
2289                 RETURN(ptlrpc_reply(req));
2290         case OBD_LOG_CANCEL:
2291                 CDEBUG(D_INODE, "log cancel\n");
2292                 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
2293                 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
2294                         RETURN(0);
2295                 rc = llog_origin_handle_cancel(req);
2296                 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
2297                         RETURN(0);
2298                 req->rq_status = rc;
2299                 rc = req_capsule_server_pack(&req->rq_pill);
2300                 if (rc)
2301                         RETURN(rc);
2302                 RETURN(ptlrpc_reply(req));
2303         case LDLM_ENQUEUE:
2304                 CDEBUG(D_INODE, "enqueue\n");
2305                 req_capsule_set(&req->rq_pill, &RQF_LDLM_ENQUEUE);
2306                 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE))
2307                         RETURN(0);
2308                 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
2309                                          ost_blocking_ast,
2310                                          ldlm_server_glimpse_ast);
2311                 fail = OBD_FAIL_OST_LDLM_REPLY_NET;
2312                 break;
2313         case LDLM_CONVERT:
2314                 CDEBUG(D_INODE, "convert\n");
2315                 req_capsule_set(&req->rq_pill, &RQF_LDLM_CONVERT);
2316                 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CONVERT))
2317                         RETURN(0);
2318                 rc = ldlm_handle_convert(req);
2319                 break;
2320         case LDLM_CANCEL:
2321                 CDEBUG(D_INODE, "cancel\n");
2322                 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
2323                 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL))
2324                         RETURN(0);
2325                 rc = ldlm_handle_cancel(req);
2326                 break;
2327         case LDLM_BL_CALLBACK:
2328         case LDLM_CP_CALLBACK:
2329                 CDEBUG(D_INODE, "callback\n");
2330                 CERROR("callbacks should not happen on OST\n");
2331                 /* fall through */
2332         default:
2333                 CERROR("Unexpected opcode %d\n",
2334                        lustre_msg_get_opc(req->rq_reqmsg));
2335                 req->rq_status = -ENOTSUPP;
2336                 rc = ptlrpc_error(req);
2337                 RETURN(rc);
2338         }
2339
2340         LASSERT(current->journal_info == NULL);
2341
2342         EXIT;
2343         /* If we're DISCONNECTing, the export_data is already freed */
2344         if (!rc && lustre_msg_get_opc(req->rq_reqmsg) != OST_DISCONNECT)
2345                 target_committed_to_req(req);
2346
2347 out:
2348         if (!rc)
2349                 oti_to_request(oti, req);
2350
2351         target_send_reply(req, rc, fail);
2352         return 0;
2353 }
2354 EXPORT_SYMBOL(ost_handle);
2355 /*
2356  * free per-thread pool created by ost_thread_init().
2357  */
2358 static void ost_thread_done(struct ptlrpc_thread *thread)
2359 {
2360         struct ost_thread_local_cache *tls; /* TLS stands for Thread-Local
2361                                              * Storage */
2362
2363         ENTRY;
2364
2365         LASSERT(thread != NULL);
2366
2367         /*
2368          * be prepared to handle partially-initialized pools (because this is
2369          * called from ost_thread_init() for cleanup.
2370          */
2371         tls = thread->t_data;
2372         if (tls != NULL) {
2373                 OBD_FREE_PTR(tls);
2374                 thread->t_data = NULL;
2375         }
2376         EXIT;
2377 }
2378
2379 /*
2380  * initialize per-thread page pool (bug 5137).
2381  */
2382 static int ost_thread_init(struct ptlrpc_thread *thread)
2383 {
2384         struct ost_thread_local_cache *tls;
2385
2386         ENTRY;
2387
2388         LASSERT(thread != NULL);
2389         LASSERT(thread->t_data == NULL);
2390         LASSERTF(thread->t_id <= OSS_THREADS_MAX, "%u\n", thread->t_id);
2391
2392         OBD_ALLOC_PTR(tls);
2393         if (tls == NULL)
2394                 RETURN(-ENOMEM);
2395         thread->t_data = tls;
2396         RETURN(0);
2397 }
2398
2399 #define OST_WATCHDOG_TIMEOUT (obd_timeout * 1000)
2400
2401 /* Sigh - really, this is an OSS, the _server_, not the _target_ */
2402 static int ost_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
2403 {
2404         struct ost_obd *ost = &obd->u.ost;
2405         struct lprocfs_static_vars lvars;
2406         int oss_min_threads;
2407         int oss_max_threads;
2408         int oss_min_create_threads;
2409         int oss_max_create_threads;
2410         int rc;
2411         ENTRY;
2412
2413         rc = cfs_cleanup_group_info();
2414         if (rc)
2415                 RETURN(rc);
2416
2417         lprocfs_ost_init_vars(&lvars);
2418         lprocfs_obd_setup(obd, lvars.obd_vars);
2419
2420         cfs_mutex_init(&ost->ost_health_mutex);
2421
2422         if (oss_num_threads) {
2423                 /* If oss_num_threads is set, it is the min and the max. */
2424                 if (oss_num_threads > OSS_THREADS_MAX)
2425                         oss_num_threads = OSS_THREADS_MAX;
2426                 if (oss_num_threads < OSS_THREADS_MIN)
2427                         oss_num_threads = OSS_THREADS_MIN;
2428                 oss_max_threads = oss_min_threads = oss_num_threads;
2429         } else {
2430                 /* Base min threads on memory and cpus */
2431                 oss_min_threads =
2432                         cfs_num_possible_cpus() * CFS_NUM_CACHEPAGES >>
2433                         (27 - CFS_PAGE_SHIFT);
2434                 if (oss_min_threads < OSS_THREADS_MIN)
2435                         oss_min_threads = OSS_THREADS_MIN;
2436                 /* Insure a 4x range for dynamic threads */
2437                 if (oss_min_threads > OSS_THREADS_MAX / 4)
2438                         oss_min_threads = OSS_THREADS_MAX / 4;
2439                 oss_max_threads = min(OSS_THREADS_MAX, oss_min_threads * 4 + 1);
2440         }
2441
2442         ost->ost_service =
2443                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
2444                                 OST_MAXREPSIZE, OST_REQUEST_PORTAL,
2445                                 OSC_REPLY_PORTAL, OSS_SERVICE_WATCHDOG_FACTOR,
2446                                 ost_handle, LUSTRE_OSS_NAME,
2447                                 obd->obd_proc_entry, target_print_req,
2448                                 oss_min_threads, oss_max_threads,
2449                                 "ll_ost", LCT_DT_THREAD, NULL);
2450         if (ost->ost_service == NULL) {
2451                 CERROR("failed to start service\n");
2452                 GOTO(out_lprocfs, rc = -ENOMEM);
2453         }
2454
2455         rc = ptlrpc_start_threads(ost->ost_service);
2456         if (rc)
2457                 GOTO(out_service, rc = -EINVAL);
2458
2459         if (oss_num_create_threads) {
2460                 if (oss_num_create_threads > OSS_MAX_CREATE_THREADS)
2461                         oss_num_create_threads = OSS_MAX_CREATE_THREADS;
2462                 if (oss_num_create_threads < OSS_MIN_CREATE_THREADS)
2463                         oss_num_create_threads = OSS_MIN_CREATE_THREADS;
2464                 oss_min_create_threads = oss_max_create_threads =
2465                         oss_num_create_threads;
2466         } else {
2467                 oss_min_create_threads = OSS_MIN_CREATE_THREADS;
2468                 oss_max_create_threads = OSS_MAX_CREATE_THREADS;
2469         }
2470
2471         ost->ost_create_service =
2472                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
2473                                 OST_MAXREPSIZE, OST_CREATE_PORTAL,
2474                                 OSC_REPLY_PORTAL, OSS_SERVICE_WATCHDOG_FACTOR,
2475                                 ost_handle, "ost_create",
2476                                 obd->obd_proc_entry, target_print_req,
2477                                 oss_min_create_threads, oss_max_create_threads,
2478                                 "ll_ost_creat", LCT_DT_THREAD, NULL);
2479         if (ost->ost_create_service == NULL) {
2480                 CERROR("failed to start OST create service\n");
2481                 GOTO(out_service, rc = -ENOMEM);
2482         }
2483
2484         rc = ptlrpc_start_threads(ost->ost_create_service);
2485         if (rc)
2486                 GOTO(out_create, rc = -EINVAL);
2487
2488         ost->ost_io_service =
2489                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
2490                                 OST_MAXREPSIZE, OST_IO_PORTAL,
2491                                 OSC_REPLY_PORTAL, OSS_SERVICE_WATCHDOG_FACTOR,
2492                                 ost_handle, "ost_io",
2493                                 obd->obd_proc_entry, target_print_req,
2494                                 oss_min_threads, oss_max_threads,
2495                                 "ll_ost_io", LCT_DT_THREAD, ost_hpreq_handler);
2496         if (ost->ost_io_service == NULL) {
2497                 CERROR("failed to start OST I/O service\n");
2498                 GOTO(out_create, rc = -ENOMEM);
2499         }
2500
2501         ost->ost_io_service->srv_init = ost_thread_init;
2502         ost->ost_io_service->srv_done = ost_thread_done;
2503         ost->ost_io_service->srv_cpu_affinity = 1;
2504         rc = ptlrpc_start_threads(ost->ost_io_service);
2505         if (rc)
2506                 GOTO(out_io, rc = -EINVAL);
2507
2508         ping_evictor_start();
2509
2510         RETURN(0);
2511
2512 out_io:
2513         ptlrpc_unregister_service(ost->ost_io_service);
2514         ost->ost_io_service = NULL;
2515 out_create:
2516         ptlrpc_unregister_service(ost->ost_create_service);
2517         ost->ost_create_service = NULL;
2518 out_service:
2519         ptlrpc_unregister_service(ost->ost_service);
2520         ost->ost_service = NULL;
2521 out_lprocfs:
2522         lprocfs_obd_cleanup(obd);
2523         RETURN(rc);
2524 }
2525
2526 static int ost_cleanup(struct obd_device *obd)
2527 {
2528         struct ost_obd *ost = &obd->u.ost;
2529         int err = 0;
2530         ENTRY;
2531
2532         ping_evictor_stop();
2533
2534         /* there is no recovery for OST OBD, all recovery is controlled by
2535          * obdfilter OBD */
2536         LASSERT(obd->obd_recovering == 0);
2537         cfs_mutex_lock(&ost->ost_health_mutex);
2538         ptlrpc_unregister_service(ost->ost_service);
2539         ptlrpc_unregister_service(ost->ost_create_service);
2540         ptlrpc_unregister_service(ost->ost_io_service);
2541         ost->ost_service = NULL;
2542         ost->ost_create_service = NULL;
2543         cfs_mutex_unlock(&ost->ost_health_mutex);
2544
2545         lprocfs_obd_cleanup(obd);
2546
2547         RETURN(err);
2548 }
2549
2550 static int ost_health_check(const struct lu_env *env, struct obd_device *obd)
2551 {
2552         struct ost_obd *ost = &obd->u.ost;
2553         int rc = 0;
2554
2555         cfs_mutex_lock(&ost->ost_health_mutex);
2556         rc |= ptlrpc_service_health_check(ost->ost_service);
2557         rc |= ptlrpc_service_health_check(ost->ost_create_service);
2558         rc |= ptlrpc_service_health_check(ost->ost_io_service);
2559         cfs_mutex_unlock(&ost->ost_health_mutex);
2560
2561         /*
2562          * health_check to return 0 on healthy
2563          * and 1 on unhealthy.
2564          */
2565         if( rc != 0)
2566                 rc = 1;
2567
2568         return rc;
2569 }
2570
2571 struct ost_thread_local_cache *ost_tls(struct ptlrpc_request *r)
2572 {
2573         return (struct ost_thread_local_cache *)(r->rq_svc_thread->t_data);
2574 }
2575
2576 /* use obd ops to offer management infrastructure */
2577 static struct obd_ops ost_obd_ops = {
2578         .o_owner        = THIS_MODULE,
2579         .o_setup        = ost_setup,
2580         .o_cleanup      = ost_cleanup,
2581         .o_health_check = ost_health_check,
2582 };
2583
2584
2585 static int __init ost_init(void)
2586 {
2587         struct lprocfs_static_vars lvars;
2588         int rc;
2589         ENTRY;
2590
2591         lprocfs_ost_init_vars(&lvars);
2592         rc = class_register_type(&ost_obd_ops, NULL, lvars.module_vars,
2593                                  LUSTRE_OSS_NAME, NULL);
2594
2595         if (ost_num_threads != 0 && oss_num_threads == 0) {
2596                 LCONSOLE_INFO("ost_num_threads module parameter is deprecated, "
2597                               "use oss_num_threads instead or unset both for "
2598                               "dynamic thread startup\n");
2599                 oss_num_threads = ost_num_threads;
2600         }
2601
2602         RETURN(rc);
2603 }
2604
2605 static void /*__exit*/ ost_exit(void)
2606 {
2607         class_unregister_type(LUSTRE_OSS_NAME);
2608 }
2609
2610 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2611 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
2612 MODULE_LICENSE("GPL");
2613
2614 module_init(ost_init);
2615 module_exit(ost_exit);