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, 2013, Intel Corporation.
  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 #define DEBUG_SUBSYSTEM S_OST
  43
  44 #include <linux/module.h>
  45 #include <obd_cksum.h>
  46 #include <obd_ost.h>
  47 #include <lustre_net.h>
  48 #include <lustre_dlm.h>
  49 #include <lustre_export.h>
  50 #include <lustre_debug.h>
  51 #include <lustre_fid.h>
  52 #include <lustre_fld.h>
  53 #include <linux/init.h>
  54 #include <lprocfs_status.h>
  55 #include <libcfs/list.h>
  56 #include <lustre_quota.h>
  57 #include <lustre_fid.h>
  58 #include "ost_internal.h"
  59 #include <lustre_fid.h>
  60
  61 static int oss_num_threads;
  62 CFS_MODULE_PARM(oss_num_threads, "i", int, 0444,
  63                 "number of OSS service threads to start");
  64
  65 static int ost_num_threads;
  66 CFS_MODULE_PARM(ost_num_threads, "i", int, 0444,
  67                 "number of OST service threads to start (deprecated)");
  68
  69 static int oss_num_create_threads;
  70 CFS_MODULE_PARM(oss_num_create_threads, "i", int, 0444,
  71                 "number of OSS create threads to start");
  72
  73 static char *oss_cpts;
  74 CFS_MODULE_PARM(oss_cpts, "s", charp, 0444,
  75                 "CPU partitions OSS threads should run on");
  76
  77 static char *oss_io_cpts;
  78 CFS_MODULE_PARM(oss_io_cpts, "s", charp, 0444,
  79                 "CPU partitions OSS IO threads should run on");
  80
  81 /*
  82  * this page is allocated statically when module is initializing
  83  * it is used to simulate data corruptions, see ost_checksum_bulk()
  84  * for details. as the original pages provided by the layers below
  85  * can be remain in the internal cache, we do not want to modify
  86  * them.
  87  */
  88 static struct page *ost_page_to_corrupt = NULL;
  89
  90 /**
  91  * Do not return server-side uid/gid to remote client
  92  */
  93 static void ost_drop_id(struct obd_export *exp, struct obdo *oa)
  94 {
  95         if (exp_connect_rmtclient(exp)) {
  96                 oa->o_uid = -1;
  97                 oa->o_gid = -1;
  98                 oa->o_valid &= ~(OBD_MD_FLUID | OBD_MD_FLGID);
  99         }
 100 }
 101
 102 /**
 103  * Validate oa from client.
 104  * If the request comes from 2.0 clients, currently only RSVD seq and IDIF
 105  * req are valid.
 106  *    a. objects in Single MDT FS  seq = FID_SEQ_OST_MDT0, oi_id != 0
 107  *    b. Echo objects(seq = 2), old echo client still use oi_id/oi_seq to
 108  *       pack ost_id. Because non-zero oi_seq will make it diffcult to tell
 109  *       whether this is oi_fid or real ostid. So it will check
 110  *       OBD_CONNECT_FID, then convert the ostid to FID for old client.
 111  *    c. Old FID-disable osc will send IDIF.
 112  *    d. new FID-enable osc/osp will send normal FID.
 113  *
 114  * And also oi_id/f_oid should always start from 1. oi_id/f_oid = 0 will
 115  * be used for LAST_ID file, and only being accessed inside OST now.
 116  */
 117 static int ost_validate_obdo(struct obd_export *exp, struct obdo *oa,
 118                              struct obd_ioobj *ioobj)
 119 {
 120         int rc = 0;
 121
 122         if (unlikely(!(exp_connect_flags(exp) & OBD_CONNECT_FID) &&
 123                      fid_seq_is_echo(oa->o_oi.oi.oi_seq) && oa != NULL)) {
 124                 /* Sigh 2.[123] client still sends echo req with oi_id = 0
 125                  * during create, and we will reset this to 1, since this
 126                  * oi_id is basically useless in the following create process,
 127                  * but oi_id == 0 will make it difficult to tell whether it is
 128                  * real FID or ost_id. */
 129                 oa->o_oi.oi_fid.f_oid = oa->o_oi.oi.oi_id ?: 1;
 130                 oa->o_oi.oi_fid.f_seq = FID_SEQ_ECHO;
 131                 oa->o_oi.oi_fid.f_ver = 0;
 132         } else {
 133                 if (unlikely((oa == NULL) || ostid_id(&oa->o_oi) == 0))
 134                         GOTO(out, rc = -EPROTO);
 135
 136                 /* Note: this check might be forced in 2.5 or 2.6, i.e.
 137                  * all of the requests are required to setup FLGROUP */
 138                 if (unlikely(!(oa->o_valid & OBD_MD_FLGROUP))) {
 139                         ostid_set_seq_mdt0(&oa->o_oi);
 140                         if (ioobj)
 141                                 ostid_set_seq_mdt0(&ioobj->ioo_oid);
 142                         oa->o_valid |= OBD_MD_FLGROUP;
 143                 }
 144
 145                 if (unlikely(!(fid_seq_is_idif(ostid_seq(&oa->o_oi)) ||
 146                                fid_seq_is_mdt0(ostid_seq(&oa->o_oi)) ||
 147                                fid_seq_is_norm(ostid_seq(&oa->o_oi)) ||
 148                                fid_seq_is_echo(ostid_seq(&oa->o_oi)))))
 149                         GOTO(out, rc = -EPROTO);
 150         }
 151
 152         if (ioobj != NULL) {
 153                 unsigned max_brw = ioobj_max_brw_get(ioobj);
 154
 155                 if (unlikely((max_brw & (max_brw - 1)) != 0)) {
 156                         CERROR("%s: client %s sent bad ioobj max %u for "DOSTID
 157                                ": rc = -EPROTO\n", exp->exp_obd->obd_name,
 158                                obd_export_nid2str(exp), max_brw,
 159                                POSTID(&oa->o_oi));
 160                         GOTO(out, rc = -EPROTO);
 161                 }
 162                 ioobj->ioo_oid = oa->o_oi;
 163         }
 164
 165 out:
 166         if (rc != 0)
 167                 CERROR("%s: client %s sent bad object "DOSTID": rc = %d\n",
 168                        exp->exp_obd->obd_name, obd_export_nid2str(exp),
 169                        oa ? ostid_seq(&oa->o_oi) : -1,
 170                        oa ? ostid_id(&oa->o_oi) : -1, rc);
 171         return rc;
 172 }
 173
 174 void oti_to_request(struct obd_trans_info *oti, struct ptlrpc_request *req)
 175 {
 176         struct oti_req_ack_lock *ack_lock;
 177         int i;
 178
 179         if (oti == NULL)
 180                 return;
 181
 182         if (req->rq_repmsg) {
 183                 __u64 versions[PTLRPC_NUM_VERSIONS] = { 0 };
 184                 lustre_msg_set_transno(req->rq_repmsg, oti->oti_transno);
 185                 versions[0] = oti->oti_pre_version;
 186                 lustre_msg_set_versions(req->rq_repmsg, versions);
 187         }
 188         req->rq_transno = oti->oti_transno;
 189
 190         /* XXX 4 == entries in oti_ack_locks??? */
 191         for (ack_lock = oti->oti_ack_locks, i = 0; i < 4; i++, ack_lock++) {
 192                 if (!ack_lock->mode)
 193                         break;
 194                 /* XXX not even calling target_send_reply in some cases... */
 195                 ptlrpc_save_lock (req, &ack_lock->lock, ack_lock->mode, 0);
 196         }
 197 }
 198
 199 static int ost_destroy(struct obd_export *exp, struct ptlrpc_request *req,
 200                        struct obd_trans_info *oti)
 201 {
 202         struct ost_body *body, *repbody;
 203         struct lustre_capa *capa = NULL;
 204         int rc;
 205         ENTRY;
 206
 207         /* Get the request body */
 208         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 209         if (body == NULL)
 210                 RETURN(-EFAULT);
 211
 212         if (ostid_id(&body->oa.o_oi) == 0)
 213                 RETURN(-EPROTO);
 214
 215         rc = ost_validate_obdo(exp, &body->oa, NULL);
 216         if (rc)
 217                 RETURN(rc);
 218
 219         /* If there's a DLM request, cancel the locks mentioned in it*/
 220         if (req_capsule_field_present(&req->rq_pill, &RMF_DLM_REQ, RCL_CLIENT)) {
 221                 struct ldlm_request *dlm;
 222
 223                 dlm = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
 224                 if (dlm == NULL)
 225                         RETURN (-EFAULT);
 226                 ldlm_request_cancel(req, dlm, 0);
 227         }
 228
 229         /* If there's a capability, get it */
 230         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 231                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 232                 if (capa == NULL) {
 233                         CERROR("Missing capability for OST DESTROY");
 234                         RETURN (-EFAULT);
 235                 }
 236         }
 237
 238         /* Prepare the reply */
 239         rc = req_capsule_server_pack(&req->rq_pill);
 240         if (rc)
 241                 RETURN(rc);
 242
 243         /* Get the log cancellation cookie */
 244         if (body->oa.o_valid & OBD_MD_FLCOOKIE)
 245                 oti->oti_logcookies = &body->oa.o_lcookie;
 246
 247         /* Finish the reply */
 248         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 249         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 250
 251         /* Do the destroy and set the reply status accordingly  */
 252         req->rq_status = obd_destroy(req->rq_svc_thread->t_env, exp,
 253                                      &repbody->oa, NULL, oti, NULL, capa);
 254         RETURN(0);
 255 }
 256
 257 /**
 258  * Helper function for getting server side [start, start+count] DLM lock
 259  * if asked by client.
 260  */
 261 static int ost_lock_get(struct obd_export *exp, struct obdo *oa,
 262                         __u64 start, __u64 count, struct lustre_handle *lh,
 263                         int mode, __u64 flags)
 264 {
 265         struct ldlm_res_id res_id;
 266         ldlm_policy_data_t policy;
 267         __u64 end = start + count;
 268
 269         ENTRY;
 270
 271         LASSERT(!lustre_handle_is_used(lh));
 272         /* o_id and o_gr are used for localizing resource, if client miss to set
 273          * them, do not trigger ASSERTION. */
 274         if (unlikely((oa->o_valid & (OBD_MD_FLID | OBD_MD_FLGROUP)) !=
 275                      (OBD_MD_FLID | OBD_MD_FLGROUP)))
 276                 RETURN(-EPROTO);
 277
 278         if (!(oa->o_valid & OBD_MD_FLFLAGS) ||
 279             !(oa->o_flags & OBD_FL_SRVLOCK))
 280                 RETURN(0);
 281
 282         ostid_build_res_name(&oa->o_oi, &res_id);
 283         CDEBUG(D_INODE, "OST-side extent lock.\n");
 284
 285         policy.l_extent.start = start & CFS_PAGE_MASK;
 286
 287         /* If ->o_blocks is EOF it means "lock till the end of the
 288          * file". Otherwise, it's size of a hole being punched (in bytes) */
 289         if (count == OBD_OBJECT_EOF || end < start)
 290                 policy.l_extent.end = OBD_OBJECT_EOF;
 291         else
 292                 policy.l_extent.end = end | ~CFS_PAGE_MASK;
 293
 294         RETURN(ldlm_cli_enqueue_local(exp->exp_obd->obd_namespace, &res_id,
 295                                       LDLM_EXTENT, &policy, mode, &flags,
 296                                       ldlm_blocking_ast, ldlm_completion_ast,
 297                                       ldlm_glimpse_ast, NULL, 0, LVB_T_NONE,
 298                                       NULL, lh));
 299 }
 300
 301 /* Helper function: release lock, if any. */
 302 static void ost_lock_put(struct obd_export *exp,
 303                          struct lustre_handle *lh, int mode)
 304 {
 305         ENTRY;
 306         if (lustre_handle_is_used(lh))
 307                 ldlm_lock_decref(lh, mode);
 308         EXIT;
 309 }
 310
 311 static int ost_getattr(struct obd_export *exp, struct ptlrpc_request *req)
 312 {
 313         struct ost_body *body, *repbody;
 314         struct obd_info *oinfo;
 315         struct lustre_handle lh = { 0 };
 316         struct lustre_capa *capa = NULL;
 317         int rc;
 318         ENTRY;
 319
 320         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 321         if (body == NULL)
 322                 RETURN(-EFAULT);
 323
 324         rc = ost_validate_obdo(exp, &body->oa, NULL);
 325         if (rc)
 326                 RETURN(rc);
 327
 328         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 329                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 330                 if (capa == NULL) {
 331                         CERROR("Missing capability for OST GETATTR");
 332                         RETURN(-EFAULT);
 333                 }
 334         }
 335
 336         rc = req_capsule_server_pack(&req->rq_pill);
 337         if (rc)
 338                 RETURN(rc);
 339
 340         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 341         repbody->oa = body->oa;
 342
 343         rc = ost_lock_get(exp, &repbody->oa, 0, OBD_OBJECT_EOF, &lh, LCK_PR, 0);
 344         if (rc)
 345                 RETURN(rc);
 346
 347         OBD_ALLOC_PTR(oinfo);
 348         if (!oinfo)
 349                 GOTO(unlock, rc = -ENOMEM);
 350         oinfo->oi_oa = &repbody->oa;
 351         oinfo->oi_capa = capa;
 352
 353         req->rq_status = obd_getattr(req->rq_svc_thread->t_env, exp, oinfo);
 354
 355         OBD_FREE_PTR(oinfo);
 356
 357         ost_drop_id(exp, &repbody->oa);
 358
 359 unlock:
 360         ost_lock_put(exp, &lh, LCK_PR);
 361         RETURN(rc);
 362 }
 363
 364 static int ost_statfs(struct ptlrpc_request *req)
 365 {
 366         struct obd_statfs *osfs;
 367         int rc;
 368         ENTRY;
 369
 370         rc = req_capsule_server_pack(&req->rq_pill);
 371         if (rc)
 372                 RETURN(rc);
 373
 374         osfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
 375
 376         req->rq_status = obd_statfs(req->rq_svc_thread->t_env, req->rq_export,
 377                                     osfs,
 378                                     cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 379                                     0);
 380         if (req->rq_status != 0)
 381                 CERROR("ost: statfs failed: rc %d\n", req->rq_status);
 382
 383         if (OBD_FAIL_CHECK(OBD_FAIL_OST_STATFS_EINPROGRESS))
 384                 req->rq_status = -EINPROGRESS;
 385
 386         RETURN(0);
 387 }
 388
 389 static int ost_create(struct obd_export *exp, struct ptlrpc_request *req,
 390                       struct obd_trans_info *oti)
 391 {
 392         struct ost_body *body, *repbody;
 393         int rc;
 394         ENTRY;
 395
 396         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 397         if (body == NULL)
 398                 RETURN(-EFAULT);
 399
 400         rc = ost_validate_obdo(req->rq_export, &body->oa, NULL);
 401         if (rc)
 402                 RETURN(rc);
 403
 404         rc = req_capsule_server_pack(&req->rq_pill);
 405         if (rc)
 406                 RETURN(rc);
 407
 408         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 409         repbody->oa = body->oa;
 410         oti->oti_logcookies = &body->oa.o_lcookie;
 411
 412         req->rq_status = obd_create(req->rq_svc_thread->t_env, exp,
 413                                     &repbody->oa, NULL, oti);
 414         //obd_log_cancel(conn, NULL, 1, oti->oti_logcookies, 0);
 415         RETURN(0);
 416 }
 417
 418 static int ost_punch(struct obd_export *exp, struct ptlrpc_request *req,
 419                      struct obd_trans_info *oti)
 420 {
 421         struct ost_body *body, *repbody;
 422         __u64 flags = 0;
 423         struct lustre_handle lh = {0,};
 424         int rc;
 425         ENTRY;
 426
 427         /* check that we do support OBD_CONNECT_TRUNCLOCK. */
 428         CLASSERT(OST_CONNECT_SUPPORTED & OBD_CONNECT_TRUNCLOCK);
 429
 430         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 431         if (body == NULL)
 432                 RETURN(-EFAULT);
 433
 434         rc = ost_validate_obdo(exp, &body->oa, NULL);
 435         if (rc)
 436                 RETURN(rc);
 437
 438         if ((body->oa.o_valid & (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS)) !=
 439             (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS))
 440                 RETURN(-EPROTO);
 441
 442         rc = req_capsule_server_pack(&req->rq_pill);
 443         if (rc)
 444                 RETURN(rc);
 445
 446         /* standard truncate optimization: if file body is completely
 447          * destroyed, don't send data back to the server. */
 448         if (body->oa.o_size == 0)
 449                 flags |= LDLM_AST_DISCARD_DATA;
 450
 451         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 452         repbody->oa = body->oa;
 453
 454         rc = ost_lock_get(exp, &repbody->oa, repbody->oa.o_size,
 455                           repbody->oa.o_blocks, &lh, LCK_PW, flags);
 456         if (rc == 0) {
 457                 struct obd_info *oinfo;
 458                 struct lustre_capa *capa = NULL;
 459
 460                 if (repbody->oa.o_valid & OBD_MD_FLFLAGS &&
 461                     repbody->oa.o_flags == OBD_FL_SRVLOCK)
 462                         /*
 463                          * If OBD_FL_SRVLOCK is the only bit set in
 464                          * ->o_flags, clear OBD_MD_FLFLAGS to avoid falling
 465                          * through filter_setattr() to filter_iocontrol().
 466                          */
 467                         repbody->oa.o_valid &= ~OBD_MD_FLFLAGS;
 468
 469                 if (repbody->oa.o_valid & OBD_MD_FLOSSCAPA) {
 470                         capa = req_capsule_client_get(&req->rq_pill,
 471                                                       &RMF_CAPA1);
 472                         if (capa == NULL) {
 473                                 CERROR("Missing capability for OST PUNCH");
 474                                 GOTO(unlock, rc = -EFAULT);
 475                         }
 476                 }
 477
 478                 OBD_ALLOC_PTR(oinfo);
 479                 if (!oinfo)
 480                         GOTO(unlock, rc = -ENOMEM);
 481                 oinfo->oi_oa = &repbody->oa;
 482                 oinfo->oi_policy.l_extent.start = oinfo->oi_oa->o_size;
 483                 oinfo->oi_policy.l_extent.end = oinfo->oi_oa->o_blocks;
 484                 oinfo->oi_capa = capa;
 485                 oinfo->oi_flags = OBD_FL_PUNCH;
 486
 487                 req->rq_status = obd_punch(req->rq_svc_thread->t_env, exp,
 488                                            oinfo, oti, NULL);
 489                 OBD_FREE_PTR(oinfo);
 490 unlock:
 491                 ost_lock_put(exp, &lh, LCK_PW);
 492         }
 493
 494         ost_drop_id(exp, &repbody->oa);
 495         RETURN(rc);
 496 }
 497
 498 static int ost_sync(struct obd_export *exp, struct ptlrpc_request *req,
 499                     struct obd_trans_info *oti)
 500 {
 501         struct ost_body *body, *repbody;
 502         struct obd_info *oinfo;
 503         struct lustre_capa *capa = NULL;
 504         int rc;
 505         ENTRY;
 506
 507         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 508         if (body == NULL)
 509                 RETURN(-EFAULT);
 510
 511         rc = ost_validate_obdo(exp, &body->oa, NULL);
 512         if (rc)
 513                 RETURN(rc);
 514
 515         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 516                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 517                 if (capa == NULL) {
 518                         CERROR("Missing capability for OST SYNC");
 519                         RETURN (-EFAULT);
 520                 }
 521         }
 522
 523         rc = req_capsule_server_pack(&req->rq_pill);
 524         if (rc)
 525                 RETURN(rc);
 526
 527         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 528         repbody->oa = body->oa;
 529
 530         OBD_ALLOC_PTR(oinfo);
 531         if (!oinfo)
 532                 RETURN(-ENOMEM);
 533
 534         oinfo->oi_oa = &repbody->oa;
 535         oinfo->oi_capa = capa;
 536         oinfo->oi_jobid = oti->oti_jobid;
 537         req->rq_status = obd_sync(req->rq_svc_thread->t_env, exp, oinfo,
 538                                   repbody->oa.o_size, repbody->oa.o_blocks,
 539                                   NULL);
 540         OBD_FREE_PTR(oinfo);
 541
 542         ost_drop_id(exp, &repbody->oa);
 543         RETURN(0);
 544 }
 545
 546 static int ost_setattr(struct obd_export *exp, struct ptlrpc_request *req,
 547                        struct obd_trans_info *oti)
 548 {
 549         struct ost_body *body, *repbody;
 550         struct obd_info *oinfo;
 551         struct lustre_capa *capa = NULL;
 552         int rc;
 553         ENTRY;
 554
 555         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 556         if (body == NULL)
 557                 RETURN(-EFAULT);
 558
 559         rc = ost_validate_obdo(req->rq_export, &body->oa, NULL);
 560         if (rc)
 561                 RETURN(rc);
 562
 563         rc = req_capsule_server_pack(&req->rq_pill);
 564         if (rc)
 565                 RETURN(rc);
 566
 567         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 568                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 569                 if (capa == NULL) {
 570                         CERROR("Missing capability for OST SETATTR");
 571                         RETURN (-EFAULT);
 572                 }
 573         }
 574
 575         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 576         repbody->oa = body->oa;
 577
 578         OBD_ALLOC_PTR(oinfo);
 579         if (!oinfo)
 580                 RETURN(-ENOMEM);
 581         oinfo->oi_oa = &repbody->oa;
 582         oinfo->oi_capa = capa;
 583
 584         req->rq_status = obd_setattr(req->rq_svc_thread->t_env, exp, oinfo,
 585                                      oti);
 586
 587         OBD_FREE_PTR(oinfo);
 588
 589         ost_drop_id(exp, &repbody->oa);
 590         RETURN(0);
 591 }
 592
 593 static __u32 ost_checksum_bulk(struct ptlrpc_bulk_desc *desc, int opc,
 594                                cksum_type_t cksum_type)
 595 {
 596         struct cfs_crypto_hash_desc     *hdesc;
 597         unsigned int                    bufsize;
 598         int                             i, err;
 599         unsigned char                   cfs_alg = cksum_obd2cfs(cksum_type);
 600         __u32                           cksum;
 601
 602         hdesc = cfs_crypto_hash_init(cfs_alg, NULL, 0);
 603         if (IS_ERR(hdesc)) {
 604                 CERROR("Unable to initialize checksum hash %s\n",
 605                        cfs_crypto_hash_name(cfs_alg));
 606                 return PTR_ERR(hdesc);
 607         }
 608         CDEBUG(D_INFO, "Checksum for algo %s\n", cfs_crypto_hash_name(cfs_alg));
 609         for (i = 0; i < desc->bd_iov_count; i++) {
 610
 611                 /* corrupt the data before we compute the checksum, to
 612                  * simulate a client->OST data error */
 613                 if (i == 0 && opc == OST_WRITE &&
 614                     OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
 615                         int off = desc->bd_iov[i].kiov_offset & ~CFS_PAGE_MASK;
 616                         int len = desc->bd_iov[i].kiov_len;
 617                         struct page *np = ost_page_to_corrupt;
 618                         char *ptr = kmap(desc->bd_iov[i].kiov_page) + off;
 619
 620                         if (np) {
 621                                 char *ptr2 = kmap(np) + off;
 622
 623                                 memcpy(ptr2, ptr, len);
 624                                 memcpy(ptr2, "bad3", min(4, len));
 625                                 kunmap(np);
 626                                 desc->bd_iov[i].kiov_page = np;
 627                         } else {
 628                                 CERROR("can't alloc page for corruption\n");
 629                         }
 630                 }
 631                 cfs_crypto_hash_update_page(hdesc, desc->bd_iov[i].kiov_page,
 632                                   desc->bd_iov[i].kiov_offset & ~CFS_PAGE_MASK,
 633                                   desc->bd_iov[i].kiov_len);
 634
 635                  /* corrupt the data after we compute the checksum, to
 636                  * simulate an OST->client data error */
 637                 if (i == 0 && opc == OST_READ &&
 638                     OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND)) {
 639                         int off = desc->bd_iov[i].kiov_offset & ~CFS_PAGE_MASK;
 640                         int len = desc->bd_iov[i].kiov_len;
 641                         struct page *np = ost_page_to_corrupt;
 642                         char *ptr = kmap(desc->bd_iov[i].kiov_page) + off;
 643
 644                         if (np) {
 645                                 char *ptr2 = kmap(np) + off;
 646
 647                                 memcpy(ptr2, ptr, len);
 648                                 memcpy(ptr2, "bad4", min(4, len));
 649                                 kunmap(np);
 650                                 desc->bd_iov[i].kiov_page = np;
 651                         } else {
 652                                 CERROR("can't alloc page for corruption\n");
 653                         }
 654                 }
 655         }
 656
 657         bufsize = 4;
 658         err = cfs_crypto_hash_final(hdesc, (unsigned char *)&cksum, &bufsize);
 659         if (err)
 660                 cfs_crypto_hash_final(hdesc, NULL, NULL);
 661
 662         return cksum;
 663 }
 664
 665 static int ost_brw_lock_get(int mode, struct obd_export *exp,
 666                             struct obd_ioobj *obj, struct niobuf_remote *nb,
 667                             struct lustre_handle *lh)
 668 {
 669         __u64 flags               = 0;
 670         int nrbufs                = obj->ioo_bufcnt;
 671         struct ldlm_res_id res_id;
 672         ldlm_policy_data_t policy;
 673         int i;
 674         ENTRY;
 675
 676         ostid_build_res_name(&obj->ioo_oid, &res_id);
 677         LASSERT(mode == LCK_PR || mode == LCK_PW);
 678         LASSERT(!lustre_handle_is_used(lh));
 679
 680         if (nrbufs == 0 || !(nb[0].flags & OBD_BRW_SRVLOCK))
 681                 RETURN(0);
 682
 683         for (i = 1; i < nrbufs; i ++)
 684                 if ((nb[0].flags & OBD_BRW_SRVLOCK) !=
 685                     (nb[i].flags & OBD_BRW_SRVLOCK))
 686                         RETURN(-EFAULT);
 687
 688         policy.l_extent.start = nb[0].offset & CFS_PAGE_MASK;
 689         policy.l_extent.end   = (nb[nrbufs - 1].offset +
 690                                  nb[nrbufs - 1].len - 1) | ~CFS_PAGE_MASK;
 691
 692         RETURN(ldlm_cli_enqueue_local(exp->exp_obd->obd_namespace, &res_id,
 693                                       LDLM_EXTENT, &policy, mode, &flags,
 694                                       ldlm_blocking_ast, ldlm_completion_ast,
 695                                       ldlm_glimpse_ast, NULL, 0, LVB_T_NONE,
 696                                       NULL, lh));
 697 }
 698
 699 static void ost_brw_lock_put(int mode,
 700                              struct obd_ioobj *obj, struct niobuf_remote *niob,
 701                              struct lustre_handle *lh)
 702 {
 703         ENTRY;
 704         LASSERT(mode == LCK_PR || mode == LCK_PW);
 705         LASSERT((obj->ioo_bufcnt > 0 && (niob[0].flags & OBD_BRW_SRVLOCK)) ==
 706                 lustre_handle_is_used(lh));
 707         if (lustre_handle_is_used(lh))
 708                 ldlm_lock_decref(lh, mode);
 709         EXIT;
 710 }
 711
 712 /* Allocate thread local buffers if needed */
 713 static struct ost_thread_local_cache *ost_tls_get(struct ptlrpc_request *r)
 714 {
 715         struct ost_thread_local_cache *tls =
 716                 (struct ost_thread_local_cache *)(r->rq_svc_thread->t_data);
 717
 718         /* In normal mode of operation an I/O request is serviced only
 719          * by ll_ost_io threads each of them has own tls buffers allocated by
 720          * ost_io_thread_init().
 721          * During recovery, an I/O request may be queued until any of the ost
 722          * service threads process it. Not necessary it should be one of
 723          * ll_ost_io threads. In that case we dynamically allocating tls
 724          * buffers for the request service time. */
 725         if (unlikely(tls == NULL)) {
 726                 LASSERT(r->rq_export->exp_in_recovery);
 727                 OBD_ALLOC_PTR(tls);
 728                 if (tls != NULL) {
 729                         tls->temporary = 1;
 730                         r->rq_svc_thread->t_data = tls;
 731                 }
 732         }
 733         return  tls;
 734 }
 735
 736 /* Free thread local buffers if they were allocated only for servicing
 737  * this one request */
 738 static void ost_tls_put(struct ptlrpc_request *r)
 739 {
 740         struct ost_thread_local_cache *tls =
 741                 (struct ost_thread_local_cache *)(r->rq_svc_thread->t_data);
 742
 743         if (unlikely(tls->temporary)) {
 744                 OBD_FREE_PTR(tls);
 745                 r->rq_svc_thread->t_data = NULL;
 746         }
 747 }
 748
 749 static int ost_brw_read(struct ptlrpc_request *req, struct obd_trans_info *oti)
 750 {
 751         struct ptlrpc_bulk_desc *desc = NULL;
 752         struct obd_export *exp = req->rq_export;
 753         struct niobuf_remote *remote_nb;
 754         struct niobuf_local *local_nb;
 755         struct obd_ioobj *ioo;
 756         struct ost_body *body, *repbody;
 757         struct lustre_capa *capa = NULL;
 758         struct l_wait_info lwi;
 759         struct lustre_handle lockh = { 0 };
 760         int niocount, npages, nob = 0, rc, i;
 761         int no_reply = 0;
 762         struct ost_thread_local_cache *tls;
 763         ENTRY;
 764
 765         req->rq_bulk_read = 1;
 766
 767         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
 768                 GOTO(out, rc = -EIO);
 769
 770         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, (obd_timeout + 1) / 4);
 771
 772         /* Check if there is eviction in progress, and if so, wait for it to
 773          * finish */
 774         if (unlikely(cfs_atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
 775                 lwi = LWI_INTR(NULL, NULL); // We do not care how long it takes
 776                 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
 777                         !cfs_atomic_read(&exp->exp_obd->obd_evict_inprogress),
 778                         &lwi);
 779         }
 780         if (exp->exp_failed)
 781                 GOTO(out, rc = -ENOTCONN);
 782
 783         /* ost_body, ioobj & noibuf_remote are verified and swabbed in
 784          * ost_rw_hpreq_check(). */
 785         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 786         if (body == NULL)
 787                 GOTO(out, rc = -EFAULT);
 788
 789         /*
 790          * A req_capsule_X_get_array(pill, field, ptr_to_element_count) function
 791          * would be useful here and wherever we get &RMF_OBD_IOOBJ and
 792          * &RMF_NIOBUF_REMOTE.
 793          */
 794         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
 795         if (ioo == NULL)
 796                 GOTO(out, rc = -EFAULT);
 797
 798         rc = ost_validate_obdo(exp, &body->oa, ioo);
 799         if (rc)
 800                 RETURN(rc);
 801
 802         niocount = ioo->ioo_bufcnt;
 803         remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
 804         if (remote_nb == NULL)
 805                 GOTO(out, rc = -EFAULT);
 806
 807         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 808                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 809                 if (capa == NULL) {
 810                         CERROR("Missing capability for OST BRW READ");
 811                         GOTO(out, rc = -EFAULT);
 812                 }
 813         }
 814
 815         rc = req_capsule_server_pack(&req->rq_pill);
 816         if (rc)
 817                 GOTO(out, rc);
 818
 819         tls = ost_tls_get(req);
 820         if (tls == NULL)
 821                 GOTO(out_bulk, rc = -ENOMEM);
 822         local_nb = tls->local;
 823
 824         rc = ost_brw_lock_get(LCK_PR, exp, ioo, remote_nb, &lockh);
 825         if (rc != 0)
 826                 GOTO(out_tls, rc);
 827
 828         /*
 829          * If getting the lock took more time than
 830          * client was willing to wait, drop it. b=11330
 831          */
 832         if (cfs_time_current_sec() > req->rq_deadline ||
 833             OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
 834                 no_reply = 1;
 835                 CERROR("Dropping timed-out read from %s because locking"
 836                        "object "DOSTID" took %ld seconds (limit was %ld).\n",
 837                        libcfs_id2str(req->rq_peer), POSTID(&ioo->ioo_oid),
 838                        cfs_time_current_sec() - req->rq_arrival_time.tv_sec,
 839                        req->rq_deadline - req->rq_arrival_time.tv_sec);
 840                 GOTO(out_lock, rc = -ETIMEDOUT);
 841         }
 842
 843         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 844         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 845
 846         npages = OST_THREAD_POOL_SIZE;
 847         rc = obd_preprw(req->rq_svc_thread->t_env, OBD_BRW_READ, exp,
 848                         &repbody->oa, 1, ioo, remote_nb, &npages, local_nb,
 849                         oti, capa);
 850         if (rc != 0)
 851                 GOTO(out_lock, rc);
 852
 853         desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
 854                                     BULK_PUT_SOURCE, OST_BULK_PORTAL);
 855         if (desc == NULL)
 856                 GOTO(out_commitrw, rc = -ENOMEM);
 857
 858         nob = 0;
 859         for (i = 0; i < npages; i++) {
 860                 int page_rc = local_nb[i].rc;
 861
 862                 if (page_rc < 0) {              /* error */
 863                         rc = page_rc;
 864                         break;
 865                 }
 866
 867                 nob += page_rc;
 868                 if (page_rc != 0) {             /* some data! */
 869                         LASSERT (local_nb[i].page != NULL);
 870                         ptlrpc_prep_bulk_page_nopin(desc, local_nb[i].page,
 871                                                     local_nb[i].lnb_page_offset,
 872                                                     page_rc);
 873                 }
 874
 875                 if (page_rc != local_nb[i].len) { /* short read */
 876                         /* All subsequent pages should be 0 */
 877                         while(++i < npages)
 878                                 LASSERT(local_nb[i].rc == 0);
 879                         break;
 880                 }
 881         }
 882
 883         if (body->oa.o_valid & OBD_MD_FLCKSUM) {
 884                 cksum_type_t cksum_type =
 885                         cksum_type_unpack(repbody->oa.o_valid & OBD_MD_FLFLAGS ?
 886                                           repbody->oa.o_flags : 0);
 887                 repbody->oa.o_flags = cksum_type_pack(cksum_type);
 888                 repbody->oa.o_valid = OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
 889                 repbody->oa.o_cksum = ost_checksum_bulk(desc, OST_READ,cksum_type);
 890                 CDEBUG(D_PAGE, "checksum at read origin: %x\n",
 891                        repbody->oa.o_cksum);
 892         } else {
 893                 repbody->oa.o_valid = 0;
 894         }
 895         /* We're finishing using body->oa as an input variable */
 896
 897         /* Check if client was evicted while we were doing i/o before touching
 898            network */
 899         if (rc == 0) {
 900                 if (likely(!CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)))
 901                         rc = target_bulk_io(exp, desc, &lwi);
 902                 no_reply = rc != 0;
 903         }
 904
 905 out_commitrw:
 906         /* Must commit after prep above in all cases */
 907         rc = obd_commitrw(req->rq_svc_thread->t_env, OBD_BRW_READ, exp,
 908                           &repbody->oa, 1, ioo, remote_nb, npages, local_nb,
 909                           oti, rc);
 910
 911         if (rc == 0)
 912                 ost_drop_id(exp, &repbody->oa);
 913
 914 out_lock:
 915         ost_brw_lock_put(LCK_PR, ioo, remote_nb, &lockh);
 916 out_tls:
 917         ost_tls_put(req);
 918 out_bulk:
 919         if (desc && !CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))
 920                 ptlrpc_free_bulk_nopin(desc);
 921 out:
 922         LASSERT(rc <= 0);
 923         if (rc == 0) {
 924                 req->rq_status = nob;
 925                 ptlrpc_lprocfs_brw(req, nob);
 926                 target_committed_to_req(req);
 927                 ptlrpc_reply(req);
 928         } else if (!no_reply) {
 929                 /* Only reply if there was no comms problem with bulk */
 930                 target_committed_to_req(req);
 931                 req->rq_status = rc;
 932                 ptlrpc_error(req);
 933         } else {
 934                 /* reply out callback would free */
 935                 ptlrpc_req_drop_rs(req);
 936                 LCONSOLE_WARN("%s: Bulk IO read error with %s (at %s), "
 937                               "client will retry: rc %d\n",
 938                               exp->exp_obd->obd_name,
 939                               obd_uuid2str(&exp->exp_client_uuid),
 940                               obd_export_nid2str(exp), rc);
 941         }
 942         /* send a bulk after reply to simulate a network delay or reordering
 943          * by a router */
 944         if (unlikely(CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))) {
 945                 cfs_waitq_t              waitq;
 946                 struct l_wait_info       lwi1;
 947
 948                 CDEBUG(D_INFO, "reorder BULK\n");
 949                 cfs_waitq_init(&waitq);
 950
 951                 lwi1 = LWI_TIMEOUT_INTR(cfs_time_seconds(3), NULL, NULL, NULL);
 952                 l_wait_event(waitq, 0, &lwi1);
 953                 rc = target_bulk_io(exp, desc, &lwi);
 954                 ptlrpc_free_bulk_nopin(desc);
 955         }
 956
 957         RETURN(rc);
 958 }
 959
 960 static void ost_warn_on_cksum(struct ptlrpc_request *req,
 961                               struct ptlrpc_bulk_desc *desc,
 962                               struct niobuf_local *local_nb, int npages,
 963                               obd_count client_cksum, obd_count server_cksum,
 964                               int mmap)
 965 {
 966         struct obd_export *exp = req->rq_export;
 967         struct ost_body *body;
 968         char *router;
 969         char *via;
 970
 971         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 972         LASSERT (body != NULL);
 973
 974         if (req->rq_peer.nid == desc->bd_sender) {
 975                 via = router = "";
 976         } else {
 977                 via = " via ";
 978                 router = libcfs_nid2str(desc->bd_sender);
 979         }
 980
 981         if (mmap) {
 982                 CDEBUG_LIMIT(D_INFO, "client csum %x, server csum %x\n",
 983                              client_cksum, server_cksum);
 984                 return;
 985         }
 986
 987         LCONSOLE_ERROR_MSG(0x168, "BAD WRITE CHECKSUM: %s from %s%s%s inode "
 988                            DFID" object "DOSTID" extent ["LPU64"-"LPU64
 989                            "]: client csum %x, server csum %x\n",
 990                            exp->exp_obd->obd_name, libcfs_id2str(req->rq_peer),
 991                            via, router,
 992                            body->oa.o_valid & OBD_MD_FLFID ?
 993                            body->oa.o_parent_seq : (__u64)0,
 994                            body->oa.o_valid & OBD_MD_FLFID ?
 995                            body->oa.o_parent_oid : 0,
 996                            body->oa.o_valid & OBD_MD_FLFID ?
 997                            body->oa.o_parent_ver : 0,
 998                            POSTID(&body->oa.o_oi),
 999                            local_nb[0].lnb_file_offset,
1000                            local_nb[npages-1].lnb_file_offset +
1001                            local_nb[npages-1].len - 1,
1002                            client_cksum, server_cksum);
1003 }
1004
1005 static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
1006 {
1007         struct ptlrpc_bulk_desc *desc = NULL;
1008         struct obd_export       *exp = req->rq_export;
1009         struct niobuf_remote    *remote_nb;
1010         struct niobuf_local     *local_nb;
1011         struct obd_ioobj        *ioo;
1012         struct ost_body         *body, *repbody;
1013         struct l_wait_info       lwi;
1014         struct lustre_handle     lockh = {0};
1015         struct lustre_capa      *capa = NULL;
1016         __u32                   *rcs;
1017         int objcount, niocount, npages;
1018         int rc, i, j;
1019         obd_count                client_cksum = 0, server_cksum = 0;
1020         cksum_type_t             cksum_type = OBD_CKSUM_CRC32;
1021         int                      no_reply = 0, mmap = 0;
1022         __u32                    o_uid = 0, o_gid = 0;
1023         struct ost_thread_local_cache *tls;
1024         ENTRY;
1025
1026         req->rq_bulk_write = 1;
1027
1028         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
1029                 GOTO(out, rc = -EIO);
1030         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK2))
1031                 GOTO(out, rc = -EFAULT);
1032
1033         /* pause before transaction has been started */
1034         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, (obd_timeout + 1) / 4);
1035
1036         /* ost_body, ioobj & noibuf_remote are verified and swabbed in
1037          * ost_rw_hpreq_check(). */
1038         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
1039         if (body == NULL)
1040                 GOTO(out, rc = -EFAULT);
1041
1042         objcount = req_capsule_get_size(&req->rq_pill, &RMF_OBD_IOOBJ,
1043                                         RCL_CLIENT) / sizeof(*ioo);
1044         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
1045         if (ioo == NULL)
1046                 GOTO(out, rc = -EFAULT);
1047
1048         rc = ost_validate_obdo(exp, &body->oa, ioo);
1049         if (rc)
1050                 RETURN(rc);
1051
1052         for (niocount = i = 0; i < objcount; i++)
1053                 niocount += ioo[i].ioo_bufcnt;
1054
1055         /*
1056          * It'd be nice to have a capsule function to indicate how many elements
1057          * there were in a buffer for an RMF that's declared to be an array.
1058          * It's easy enough to compute the number of elements here though.
1059          */
1060         remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
1061         if (remote_nb == NULL || niocount != (req_capsule_get_size(&req->rq_pill,
1062             &RMF_NIOBUF_REMOTE, RCL_CLIENT) / sizeof(*remote_nb)))
1063                 GOTO(out, rc = -EFAULT);
1064
1065         if ((remote_nb[0].flags & OBD_BRW_MEMALLOC) &&
1066             (exp->exp_connection->c_peer.nid == exp->exp_connection->c_self))
1067                 cfs_memory_pressure_set();
1068
1069         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
1070                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
1071                 if (capa == NULL) {
1072                         CERROR("Missing capability for OST BRW WRITE");
1073                         GOTO(out, rc = -EFAULT);
1074                 }
1075         }
1076
1077         req_capsule_set_size(&req->rq_pill, &RMF_RCS, RCL_SERVER,
1078                              niocount * sizeof(*rcs));
1079         rc = req_capsule_server_pack(&req->rq_pill);
1080         if (rc != 0)
1081                 GOTO(out, rc);
1082         CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_PACK, cfs_fail_val);
1083         rcs = req_capsule_server_get(&req->rq_pill, &RMF_RCS);
1084
1085         tls = ost_tls_get(req);
1086         if (tls == NULL)
1087                 GOTO(out_bulk, rc = -ENOMEM);
1088         local_nb = tls->local;
1089
1090         rc = ost_brw_lock_get(LCK_PW, exp, ioo, remote_nb, &lockh);
1091         if (rc != 0)
1092                 GOTO(out_tls, rc);
1093
1094         /*
1095          * If getting the lock took more time than
1096          * client was willing to wait, drop it. b=11330
1097          */
1098         if (cfs_time_current_sec() > req->rq_deadline ||
1099             OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
1100                 no_reply = 1;
1101                 CERROR("Dropping timed-out write from %s because locking "
1102                        "object "DOSTID" took %ld seconds (limit was %ld).\n",
1103                        libcfs_id2str(req->rq_peer), POSTID(&ioo->ioo_oid),
1104                        cfs_time_current_sec() - req->rq_arrival_time.tv_sec,
1105                        req->rq_deadline - req->rq_arrival_time.tv_sec);
1106                 GOTO(out_lock, rc = -ETIMEDOUT);
1107         }
1108
1109         /* obd_preprw clobbers oa->valid, so save what we need */
1110         if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1111                 client_cksum = body->oa.o_cksum;
1112                 if (body->oa.o_valid & OBD_MD_FLFLAGS)
1113                         cksum_type = cksum_type_unpack(body->oa.o_flags);
1114         }
1115         if (body->oa.o_valid & OBD_MD_FLFLAGS && body->oa.o_flags & OBD_FL_MMAP)
1116                 mmap = 1;
1117
1118         /* Because we already sync grant info with client when reconnect,
1119          * grant info will be cleared for resent req, then fed_grant and
1120          * total_grant will not be modified in following preprw_write */
1121         if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
1122                 DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
1123                 body->oa.o_valid &= ~OBD_MD_FLGRANT;
1124         }
1125
1126         if (exp_connect_rmtclient(exp)) {
1127                 o_uid = body->oa.o_uid;
1128                 o_gid = body->oa.o_gid;
1129         }
1130
1131         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1132         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
1133
1134         npages = OST_THREAD_POOL_SIZE;
1135         rc = obd_preprw(req->rq_svc_thread->t_env, OBD_BRW_WRITE, exp,
1136                         &repbody->oa, objcount, ioo, remote_nb, &npages,
1137                         local_nb, oti, capa);
1138         if (rc != 0)
1139                 GOTO(out_lock, rc);
1140
1141         desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
1142                                     BULK_GET_SINK, OST_BULK_PORTAL);
1143         if (desc == NULL)
1144                 GOTO(skip_transfer, rc = -ENOMEM);
1145
1146         /* NB Having prepped, we must commit... */
1147         for (i = 0; i < npages; i++)
1148                 ptlrpc_prep_bulk_page_nopin(desc, local_nb[i].page,
1149                                             local_nb[i].lnb_page_offset,
1150                                             local_nb[i].len);
1151
1152         rc = sptlrpc_svc_prep_bulk(req, desc);
1153         if (rc != 0)
1154                 GOTO(out_lock, rc);
1155
1156         rc = target_bulk_io(exp, desc, &lwi);
1157         no_reply = rc != 0;
1158
1159 skip_transfer:
1160         if (client_cksum != 0 && rc == 0) {
1161                 static int cksum_counter;
1162                 repbody->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1163                 repbody->oa.o_flags &= ~OBD_FL_CKSUM_ALL;
1164                 repbody->oa.o_flags |= cksum_type_pack(cksum_type);
1165                 server_cksum = ost_checksum_bulk(desc, OST_WRITE, cksum_type);
1166                 repbody->oa.o_cksum = server_cksum;
1167                 cksum_counter++;
1168                 if (unlikely(client_cksum != server_cksum)) {
1169                         ost_warn_on_cksum(req, desc, local_nb, npages,
1170                                           client_cksum, server_cksum, mmap);
1171                         cksum_counter = 0;
1172
1173                 } else if ((cksum_counter & (-cksum_counter)) == cksum_counter){
1174                         CDEBUG(D_INFO, "Checksum %u from %s OK: %x\n",
1175                                cksum_counter, libcfs_id2str(req->rq_peer),
1176                                server_cksum);
1177                 }
1178         }
1179
1180         /* Must commit after prep above in all cases */
1181         rc = obd_commitrw(req->rq_svc_thread->t_env, OBD_BRW_WRITE, exp,
1182                           &repbody->oa, objcount, ioo, remote_nb, npages,
1183                           local_nb, oti, rc);
1184         if (rc == -ENOTCONN)
1185                 /* quota acquire process has been given up because
1186                  * either the client has been evicted or the client
1187                  * has timed out the request already */
1188                 no_reply = 1;
1189
1190         if (exp_connect_rmtclient(exp)) {
1191                 repbody->oa.o_uid = o_uid;
1192                 repbody->oa.o_gid = o_gid;
1193         }
1194
1195         /*
1196          * Disable sending mtime back to the client. If the client locked the
1197          * whole object, then it has already updated the mtime on its side,
1198          * otherwise it will have to glimpse anyway (see bug 21489, comment 32)
1199          */
1200         repbody->oa.o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLATIME);
1201
1202         if (rc == 0) {
1203                 int nob = 0;
1204
1205                 /* set per-requested niobuf return codes */
1206                 for (i = j = 0; i < niocount; i++) {
1207                         int len = remote_nb[i].len;
1208
1209                         nob += len;
1210                         rcs[i] = 0;
1211                         do {
1212                                 LASSERT(j < npages);
1213                                 if (local_nb[j].rc < 0)
1214                                         rcs[i] = local_nb[j].rc;
1215                                 len -= local_nb[j].len;
1216                                 j++;
1217                         } while (len > 0);
1218                         LASSERT(len == 0);
1219                 }
1220                 LASSERT(j == npages);
1221                 ptlrpc_lprocfs_brw(req, nob);
1222         }
1223
1224 out_lock:
1225         ost_brw_lock_put(LCK_PW, ioo, remote_nb, &lockh);
1226 out_tls:
1227         ost_tls_put(req);
1228 out_bulk:
1229         if (desc)
1230                 ptlrpc_free_bulk_nopin(desc);
1231 out:
1232         if (rc == 0) {
1233                 oti_to_request(oti, req);
1234                 target_committed_to_req(req);
1235                 rc = ptlrpc_reply(req);
1236         } else if (!no_reply) {
1237                 /* Only reply if there was no comms problem with bulk */
1238                 target_committed_to_req(req);
1239                 req->rq_status = rc;
1240                 ptlrpc_error(req);
1241         } else {
1242                 /* reply out callback would free */
1243                 ptlrpc_req_drop_rs(req);
1244                 LCONSOLE_WARN("%s: Bulk IO write error with %s (at %s), "
1245                               "client will retry: rc %d\n",
1246                               exp->exp_obd->obd_name,
1247                               obd_uuid2str(&exp->exp_client_uuid),
1248                               obd_export_nid2str(exp), rc);
1249         }
1250         cfs_memory_pressure_clr();
1251         RETURN(rc);
1252 }
1253
1254 /**
1255  * Implementation of OST_SET_INFO.
1256  *
1257  * OST_SET_INFO is like ioctl(): heavily overloaded.  Specifically, it takes a
1258  * "key" and a value RPC buffers as arguments, with the value's contents
1259  * interpreted according to the key.
1260  *
1261  * Value types that need swabbing have swabbing done explicitly, either here or
1262  * in functions called from here.  This should be corrected: all swabbing should
1263  * be done in the capsule abstraction, as that will then allow us to move
1264  * swabbing exclusively to the client without having to modify server code
1265  * outside the capsule abstraction's implementation itself.  To correct this
1266  * will require minor changes to the capsule abstraction; see the comments for
1267  * req_capsule_extend() in layout.c.
1268  */
1269 static int ost_set_info(struct obd_export *exp, struct ptlrpc_request *req)
1270 {
1271         struct ost_body *body = NULL, *repbody;
1272         char *key, *val = NULL;
1273         int keylen, vallen, rc = 0;
1274         int is_grant_shrink = 0;
1275         ENTRY;
1276
1277         key = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1278         if (key == NULL) {
1279                 DEBUG_REQ(D_HA, req, "no set_info key");
1280                 RETURN(-EFAULT);
1281         }
1282         keylen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_KEY,
1283                                       RCL_CLIENT);
1284
1285         vallen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_VAL,
1286                                       RCL_CLIENT);
1287
1288         if ((is_grant_shrink = KEY_IS(KEY_GRANT_SHRINK)))
1289                 /* In this case the value is actually an RMF_OST_BODY, so we
1290                  * transmutate the type of this PTLRPC */
1291                 req_capsule_extend(&req->rq_pill, &RQF_OST_SET_GRANT_INFO);
1292
1293         rc = req_capsule_server_pack(&req->rq_pill);
1294         if (rc)
1295                 RETURN(rc);
1296
1297         if (vallen) {
1298                 if (is_grant_shrink) {
1299                         body = req_capsule_client_get(&req->rq_pill,
1300                                                       &RMF_OST_BODY);
1301                         if (!body)
1302                                 RETURN(-EFAULT);
1303
1304                         repbody = req_capsule_server_get(&req->rq_pill,
1305                                                          &RMF_OST_BODY);
1306                         memcpy(repbody, body, sizeof(*body));
1307                         val = (char*)repbody;
1308                 } else {
1309                         val = req_capsule_client_get(&req->rq_pill,
1310                                                      &RMF_SETINFO_VAL);
1311                 }
1312         }
1313
1314         if (KEY_IS(KEY_EVICT_BY_NID)) {
1315                 if (val && vallen)
1316                         obd_export_evict_by_nid(exp->exp_obd, val);
1317                 GOTO(out, rc = 0);
1318         } else if (KEY_IS(KEY_MDS_CONN) && ptlrpc_req_need_swab(req)) {
1319                 if (vallen < sizeof(__u32))
1320                         RETURN(-EFAULT);
1321                 __swab32s((__u32 *)val);
1322         }
1323
1324         /* OBD will also check if KEY_IS(KEY_GRANT_SHRINK), and will cast val to
1325          * a struct ost_body * value */
1326         rc = obd_set_info_async(req->rq_svc_thread->t_env, exp, keylen,
1327                                 key, vallen, val, NULL);
1328 out:
1329         lustre_msg_set_status(req->rq_repmsg, 0);
1330         RETURN(rc);
1331 }
1332
1333 static int ost_get_info(struct obd_export *exp, struct ptlrpc_request *req)
1334 {
1335         void *key, *reply;
1336         int keylen, replylen, rc = 0;
1337         struct req_capsule *pill = &req->rq_pill;
1338         ENTRY;
1339
1340         /* this common part for get_info rpc */
1341         key = req_capsule_client_get(pill, &RMF_SETINFO_KEY);
1342         if (key == NULL) {
1343                 DEBUG_REQ(D_HA, req, "no get_info key");
1344                 RETURN(-EFAULT);
1345         }
1346         keylen = req_capsule_get_size(pill, &RMF_SETINFO_KEY, RCL_CLIENT);
1347
1348         if (KEY_IS(KEY_FIEMAP)) {
1349                 struct ll_fiemap_info_key *fm_key = key;
1350                 int rc;
1351
1352                 rc = ost_validate_obdo(exp, &fm_key->oa, NULL);
1353                 if (rc)
1354                         RETURN(rc);
1355         }
1356
1357         rc = obd_get_info(req->rq_svc_thread->t_env, exp, keylen, key,
1358                           &replylen, NULL, NULL);
1359         if (rc)
1360                 RETURN(rc);
1361
1362         req_capsule_set_size(pill, &RMF_GENERIC_DATA,
1363                              RCL_SERVER, replylen);
1364
1365         rc = req_capsule_server_pack(pill);
1366         if (rc)
1367                 RETURN(rc);
1368
1369         reply = req_capsule_server_get(pill, &RMF_GENERIC_DATA);
1370         if (reply == NULL)
1371                 RETURN(-ENOMEM);
1372
1373         if (KEY_IS(KEY_LAST_FID)) {
1374                 void *val;
1375                 int vallen;
1376
1377                 req_capsule_extend(pill, &RQF_OST_GET_INFO_LAST_FID);
1378                 val = req_capsule_client_get(pill, &RMF_SETINFO_VAL);
1379                 vallen = req_capsule_get_size(pill, &RMF_SETINFO_VAL,
1380                                               RCL_CLIENT);
1381                 if (val != NULL && vallen > 0 && replylen >= vallen) {
1382                         memcpy(reply, val, vallen);
1383                 } else {
1384                         CERROR("%s: invalid req val %p vallen %d replylen %d\n",
1385                                exp->exp_obd->obd_name, val, vallen, replylen);
1386                         GOTO(out, rc = -EINVAL);
1387                 }
1388         }
1389
1390         /* call again to fill in the reply buffer */
1391         rc = obd_get_info(req->rq_svc_thread->t_env, exp, keylen, key,
1392                           &replylen, reply, NULL);
1393 out:
1394         lustre_msg_set_status(req->rq_repmsg, 0);
1395         RETURN(rc);
1396 }
1397
1398 static int ost_handle_quotactl(struct ptlrpc_request *req)
1399 {
1400         struct obd_quotactl *oqctl, *repoqc;
1401         int rc;
1402         ENTRY;
1403
1404         oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1405         if (oqctl == NULL)
1406                 GOTO(out, rc = -EPROTO);
1407
1408         rc = req_capsule_server_pack(&req->rq_pill);
1409         if (rc)
1410                 GOTO(out, rc);
1411
1412         repoqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1413         req->rq_status = obd_quotactl(req->rq_export, oqctl);
1414         *repoqc = *oqctl;
1415
1416 out:
1417         RETURN(rc);
1418 }
1419
1420 static int ost_handle_quotacheck(struct ptlrpc_request *req)
1421 {
1422         struct obd_quotactl *oqctl;
1423         int rc;
1424         ENTRY;
1425
1426         oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1427         if (oqctl == NULL)
1428                 RETURN(-EPROTO);
1429
1430         rc = req_capsule_server_pack(&req->rq_pill);
1431         if (rc)
1432                 RETURN(-ENOMEM);
1433
1434         /* deprecated, not used any more */
1435         req->rq_status = -EOPNOTSUPP;
1436         RETURN(-EOPNOTSUPP);
1437 }
1438
1439 static int ost_llog_handle_connect(struct obd_export *exp,
1440                                    struct ptlrpc_request *req)
1441 {
1442         struct llogd_conn_body *body;
1443         int rc;
1444         ENTRY;
1445
1446         body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_CONN_BODY);
1447         rc = obd_llog_connect(exp, body);
1448         RETURN(rc);
1449 }
1450
1451 #define ost_init_sec_none(reply, exp)                                   \
1452 do {                                                                    \
1453         reply->ocd_connect_flags &= ~(OBD_CONNECT_RMT_CLIENT |          \
1454                                       OBD_CONNECT_RMT_CLIENT_FORCE |    \
1455                                       OBD_CONNECT_OSS_CAPA);            \
1456         spin_lock(&exp->exp_lock);                                      \
1457         *exp_connect_flags_ptr(exp) = reply->ocd_connect_flags;         \
1458         spin_unlock(&exp->exp_lock);                                    \
1459 } while (0)
1460
1461 static int ost_init_sec_level(struct ptlrpc_request *req)
1462 {
1463         struct obd_export *exp = req->rq_export;
1464         struct req_capsule *pill = &req->rq_pill;
1465         struct obd_device *obd = exp->exp_obd;
1466         struct filter_obd *filter = &obd->u.filter;
1467         char *client = libcfs_nid2str(req->rq_peer.nid);
1468         struct obd_connect_data *data, *reply;
1469         int rc = 0, remote;
1470         ENTRY;
1471
1472         data = req_capsule_client_get(pill, &RMF_CONNECT_DATA);
1473         reply = req_capsule_server_get(pill, &RMF_CONNECT_DATA);
1474         if (data == NULL || reply == NULL)
1475                 RETURN(-EFAULT);
1476
1477         /* connection from MDT is always trusted */
1478         if (req->rq_auth_usr_mdt) {
1479                 ost_init_sec_none(reply, exp);
1480                 RETURN(0);
1481         }
1482
1483         /* no GSS support case */
1484         if (!req->rq_auth_gss) {
1485                 if (filter->fo_sec_level > LUSTRE_SEC_NONE) {
1486                         CWARN("client %s -> target %s does not user GSS, "
1487                               "can not run under security level %d.\n",
1488                               client, obd->obd_name, filter->fo_sec_level);
1489                         RETURN(-EACCES);
1490                 } else {
1491                         ost_init_sec_none(reply, exp);
1492                         RETURN(0);
1493                 }
1494         }
1495
1496         /* old version case */
1497         if (unlikely(!(data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) ||
1498                      !(data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA))) {
1499                 if (filter->fo_sec_level > LUSTRE_SEC_NONE) {
1500                         CWARN("client %s -> target %s uses old version, "
1501                               "can not run under security level %d.\n",
1502                               client, obd->obd_name, filter->fo_sec_level);
1503                         RETURN(-EACCES);
1504                 } else {
1505                         CWARN("client %s -> target %s uses old version, "
1506                               "run under security level %d.\n",
1507                               client, obd->obd_name, filter->fo_sec_level);
1508                         ost_init_sec_none(reply, exp);
1509                         RETURN(0);
1510                 }
1511         }
1512
1513         remote = data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT_FORCE;
1514         if (remote) {
1515                 if (!req->rq_auth_remote)
1516                         CDEBUG(D_SEC, "client (local realm) %s -> target %s "
1517                                "asked to be remote.\n", client, obd->obd_name);
1518         } else if (req->rq_auth_remote) {
1519                 remote = 1;
1520                 CDEBUG(D_SEC, "client (remote realm) %s -> target %s is set "
1521                        "as remote by default.\n", client, obd->obd_name);
1522         }
1523
1524         if (remote) {
1525                 if (!filter->fo_fl_oss_capa) {
1526                         CDEBUG(D_SEC, "client %s -> target %s is set as remote,"
1527                                " but OSS capabilities are not enabled: %d.\n",
1528                                client, obd->obd_name, filter->fo_fl_oss_capa);
1529                         RETURN(-EACCES);
1530                 }
1531         }
1532
1533         switch (filter->fo_sec_level) {
1534         case LUSTRE_SEC_NONE:
1535                 if (!remote) {
1536                         ost_init_sec_none(reply, exp);
1537                         break;
1538                 } else {
1539                         CDEBUG(D_SEC, "client %s -> target %s is set as remote, "
1540                                "can not run under security level %d.\n",
1541                                client, obd->obd_name, filter->fo_sec_level);
1542                         RETURN(-EACCES);
1543                 }
1544         case LUSTRE_SEC_REMOTE:
1545                 if (!remote)
1546                         ost_init_sec_none(reply, exp);
1547                 break;
1548         case LUSTRE_SEC_ALL:
1549                 if (!remote) {
1550                         reply->ocd_connect_flags &= ~(OBD_CONNECT_RMT_CLIENT |
1551                                                       OBD_CONNECT_RMT_CLIENT_FORCE);
1552                         if (!filter->fo_fl_oss_capa)
1553                                 reply->ocd_connect_flags &= ~OBD_CONNECT_OSS_CAPA;
1554
1555                         spin_lock(&exp->exp_lock);
1556                         *exp_connect_flags_ptr(exp) = reply->ocd_connect_flags;
1557                         spin_unlock(&exp->exp_lock);
1558                 }
1559                 break;
1560         default:
1561                 RETURN(-EINVAL);
1562         }
1563
1564         RETURN(rc);
1565 }
1566
1567 /*
1568  * FIXME
1569  * this should be done in filter_connect()/filter_reconnect(), but
1570  * we can't obtain information like NID, which stored in incoming
1571  * request, thus can't decide what flavor to use. so we do it here.
1572  *
1573  * This hack should be removed after the OST stack be rewritten, just
1574  * like what we are doing in mdt_obd_connect()/mdt_obd_reconnect().
1575  */
1576 static int ost_connect_check_sptlrpc(struct ptlrpc_request *req)
1577 {
1578         struct obd_export     *exp = req->rq_export;
1579         struct filter_obd     *filter = &exp->exp_obd->u.filter;
1580         struct sptlrpc_flavor  flvr;
1581         int                    rc = 0;
1582
1583         if (unlikely(strcmp(exp->exp_obd->obd_type->typ_name,
1584                             LUSTRE_ECHO_NAME) == 0)) {
1585                 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
1586                 return 0;
1587         }
1588
1589         if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
1590                 read_lock(&filter->fo_sptlrpc_lock);
1591                 sptlrpc_target_choose_flavor(&filter->fo_sptlrpc_rset,
1592                                              req->rq_sp_from,
1593                                              req->rq_peer.nid,
1594                                              &flvr);
1595                 read_unlock(&filter->fo_sptlrpc_lock);
1596
1597                 spin_lock(&exp->exp_lock);
1598
1599                 exp->exp_sp_peer = req->rq_sp_from;
1600                 exp->exp_flvr = flvr;
1601
1602                 if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
1603                     exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
1604                         CERROR("unauthorized rpc flavor %x from %s, "
1605                                "expect %x\n", req->rq_flvr.sf_rpc,
1606                                libcfs_nid2str(req->rq_peer.nid),
1607                                exp->exp_flvr.sf_rpc);
1608                         rc = -EACCES;
1609                 }
1610
1611                 spin_unlock(&exp->exp_lock);
1612         } else {
1613                 if (exp->exp_sp_peer != req->rq_sp_from) {
1614                         CERROR("RPC source %s doesn't match %s\n",
1615                                sptlrpc_part2name(req->rq_sp_from),
1616                                sptlrpc_part2name(exp->exp_sp_peer));
1617                         rc = -EACCES;
1618                 } else {
1619                         rc = sptlrpc_target_export_check(exp, req);
1620                 }
1621         }
1622
1623         return rc;
1624 }
1625
1626 /* Ensure that data and metadata are synced to the disk when lock is cancelled
1627  * (if requested) */
1628 int ost_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
1629                      void *data, int flag)
1630 {
1631         struct lu_env   env;
1632         __u32           sync_lock_cancel = 0;
1633         __u32           len = sizeof(sync_lock_cancel);
1634         int             rc = 0;
1635
1636         ENTRY;
1637
1638         rc = lu_env_init(&env, LCT_DT_THREAD);
1639         if (unlikely(rc != 0))
1640                 RETURN(rc);
1641
1642         rc = obd_get_info(&env, lock->l_export, sizeof(KEY_SYNC_LOCK_CANCEL),
1643                           KEY_SYNC_LOCK_CANCEL, &len, &sync_lock_cancel, NULL);
1644         if (rc == 0 && flag == LDLM_CB_CANCELING &&
1645             (lock->l_granted_mode & (LCK_PW|LCK_GROUP)) &&
1646             (sync_lock_cancel == ALWAYS_SYNC_ON_CANCEL ||
1647              (sync_lock_cancel == BLOCKING_SYNC_ON_CANCEL &&
1648               lock->l_flags & LDLM_FL_CBPENDING))) {
1649                 struct obd_info *oinfo;
1650                 struct obdo     *oa;
1651                 int              rc;
1652
1653                 OBD_ALLOC_PTR(oinfo);
1654                 if (!oinfo)
1655                         GOTO(out_env, rc = -ENOMEM);
1656                 OBDO_ALLOC(oa);
1657                 if (!oa) {
1658                         OBD_FREE_PTR(oinfo);
1659                         GOTO(out_env, rc = -ENOMEM);
1660                 }
1661
1662                 ostid_res_name_to_id(&oa->o_oi, &lock->l_resource->lr_name);
1663                 oa->o_valid = OBD_MD_FLID|OBD_MD_FLGROUP;
1664                 oinfo->oi_oa = oa;
1665                 oinfo->oi_capa = BYPASS_CAPA;
1666
1667                 rc = obd_sync(&env, lock->l_export, oinfo,
1668                               lock->l_policy_data.l_extent.start,
1669                               lock->l_policy_data.l_extent.end, NULL);
1670                 if (rc)
1671                         CERROR("Error %d syncing data on lock cancel\n", rc);
1672
1673                 OBDO_FREE(oa);
1674                 OBD_FREE_PTR(oinfo);
1675         }
1676
1677         rc = ldlm_server_blocking_ast(lock, desc, data, flag);
1678 out_env:
1679         lu_env_fini(&env);
1680         RETURN(rc);
1681 }
1682
1683 static int ost_filter_recovery_request(struct ptlrpc_request *req,
1684                                        struct obd_device *obd, int *process)
1685 {
1686         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1687         case OST_CONNECT: /* This will never get here, but for completeness. */
1688         case OST_DISCONNECT:
1689                *process = 1;
1690                RETURN(0);
1691
1692         case OBD_PING:
1693         case OST_CREATE:
1694         case OST_DESTROY:
1695         case OST_PUNCH:
1696         case OST_SETATTR:
1697         case OST_SYNC:
1698         case OST_WRITE:
1699         case OBD_LOG_CANCEL:
1700         case LDLM_ENQUEUE:
1701                 *process = target_queue_recovery_request(req, obd);
1702                 RETURN(0);
1703
1704         default:
1705                 DEBUG_REQ(D_WARNING, req, "not permitted during recovery");
1706                 *process = -EAGAIN;
1707                 RETURN(0);
1708         }
1709 }
1710
1711 int ost_msg_check_version(struct lustre_msg *msg)
1712 {
1713         int rc;
1714
1715         switch(lustre_msg_get_opc(msg)) {
1716         case OST_CONNECT:
1717         case OST_DISCONNECT:
1718         case OBD_PING:
1719         case SEC_CTX_INIT:
1720         case SEC_CTX_INIT_CONT:
1721         case SEC_CTX_FINI:
1722                 rc = lustre_msg_check_version(msg, LUSTRE_OBD_VERSION);
1723                 if (rc)
1724                         CERROR("bad opc %u version %08x, expecting %08x\n",
1725                                lustre_msg_get_opc(msg),
1726                                lustre_msg_get_version(msg),
1727                                LUSTRE_OBD_VERSION);
1728                 break;
1729         case SEQ_QUERY:
1730                 /* Note: client always use MDS_VERSION for FID request */
1731                 rc = lustre_msg_check_version(msg, LUSTRE_MDS_VERSION);
1732                 if (rc)
1733                         CERROR("bad opc %u version %08x, expecting %08x\n",
1734                                lustre_msg_get_opc(msg),
1735                                lustre_msg_get_version(msg),
1736                                LUSTRE_MDS_VERSION);
1737                 break;
1738         case OST_CREATE:
1739         case OST_DESTROY:
1740         case OST_GETATTR:
1741         case OST_SETATTR:
1742         case OST_WRITE:
1743         case OST_READ:
1744         case OST_PUNCH:
1745         case OST_STATFS:
1746         case OST_SYNC:
1747         case OST_SET_INFO:
1748         case OST_GET_INFO:
1749         case OST_QUOTACHECK:
1750         case OST_QUOTACTL:
1751                 rc = lustre_msg_check_version(msg, LUSTRE_OST_VERSION);
1752                 if (rc)
1753                         CERROR("bad opc %u version %08x, expecting %08x\n",
1754                                lustre_msg_get_opc(msg),
1755                                lustre_msg_get_version(msg),
1756                                LUSTRE_OST_VERSION);
1757                 break;
1758         case LDLM_ENQUEUE:
1759         case LDLM_CONVERT:
1760         case LDLM_CANCEL:
1761         case LDLM_BL_CALLBACK:
1762         case LDLM_CP_CALLBACK:
1763                 rc = lustre_msg_check_version(msg, LUSTRE_DLM_VERSION);
1764                 if (rc)
1765                         CERROR("bad opc %u version %08x, expecting %08x\n",
1766                                lustre_msg_get_opc(msg),
1767                                lustre_msg_get_version(msg),
1768                                LUSTRE_DLM_VERSION);
1769                 break;
1770         case LLOG_ORIGIN_CONNECT:
1771         case OBD_LOG_CANCEL:
1772                 rc = lustre_msg_check_version(msg, LUSTRE_LOG_VERSION);
1773                 if (rc)
1774                         CERROR("bad opc %u version %08x, expecting %08x\n",
1775                                lustre_msg_get_opc(msg),
1776                                lustre_msg_get_version(msg),
1777                                LUSTRE_LOG_VERSION);
1778                 break;
1779         case OST_QUOTA_ADJUST_QUNIT:
1780                 rc = -ENOTSUPP;
1781                 CERROR("Quota adjust is deprecated as of 2.4.0\n");
1782                 break;
1783         default:
1784                 CERROR("Unexpected opcode %d\n", lustre_msg_get_opc(msg));
1785                 rc = -ENOTSUPP;
1786         }
1787         return rc;
1788 }
1789
1790 struct ost_prolong_data {
1791         struct ptlrpc_request *opd_req;
1792         struct obd_export     *opd_exp;
1793         struct obdo           *opd_oa;
1794         struct ldlm_res_id     opd_resid;
1795         struct ldlm_extent     opd_extent;
1796         ldlm_mode_t            opd_mode;
1797         unsigned int           opd_locks;
1798         int                    opd_timeout;
1799 };
1800
1801 /* prolong locks for the current service time of the corresponding
1802  * portal (= OST_IO_PORTAL)
1803  */
1804 static inline int prolong_timeout(struct ptlrpc_request *req)
1805 {
1806         struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt;
1807
1808         if (AT_OFF)
1809                 return obd_timeout / 2;
1810
1811         return max(at_est2timeout(at_get(&svcpt->scp_at_estimate)),
1812                    ldlm_timeout);
1813 }
1814
1815 static void ost_prolong_lock_one(struct ost_prolong_data *opd,
1816                                  struct ldlm_lock *lock)
1817 {
1818         LASSERT(lock->l_export == opd->opd_exp);
1819
1820         if (lock->l_destroyed) /* lock already cancelled */
1821                 return;
1822
1823         /* XXX: never try to grab resource lock here because we're inside
1824          * exp_bl_list_lock; in ldlm_lockd.c to handle waiting list we take
1825          * res lock and then exp_bl_list_lock. */
1826
1827         if (!(lock->l_flags & LDLM_FL_AST_SENT))
1828                 /* ignore locks not being cancelled */
1829                 return;
1830
1831         LDLM_DEBUG(lock,
1832                    "refreshed for req x"LPU64" ext("LPU64"->"LPU64") to %ds.\n",
1833                    opd->opd_req->rq_xid, opd->opd_extent.start,
1834                    opd->opd_extent.end, opd->opd_timeout);
1835
1836         /* OK. this is a possible lock the user holds doing I/O
1837          * let's refresh eviction timer for it */
1838         ldlm_refresh_waiting_lock(lock, opd->opd_timeout);
1839         ++opd->opd_locks;
1840 }
1841
1842 static void ost_prolong_locks(struct ost_prolong_data *data)
1843 {
1844         struct obd_export *exp = data->opd_exp;
1845         struct obdo       *oa  = data->opd_oa;
1846         struct ldlm_lock  *lock;
1847         ENTRY;
1848
1849         if (oa->o_valid & OBD_MD_FLHANDLE) {
1850                 /* mostly a request should be covered by only one lock, try
1851                  * fast path. */
1852                 lock = ldlm_handle2lock(&oa->o_handle);
1853                 if (lock != NULL) {
1854                         /* Fast path to check if the lock covers the whole IO
1855                          * region exclusively. */
1856                         if (lock->l_granted_mode == LCK_PW &&
1857                             ldlm_extent_contain(&lock->l_policy_data.l_extent,
1858                                                 &data->opd_extent)) {
1859                                 /* bingo */
1860                                 ost_prolong_lock_one(data, lock);
1861                                 LDLM_LOCK_PUT(lock);
1862                                 RETURN_EXIT;
1863                         }
1864                         LDLM_LOCK_PUT(lock);
1865                 }
1866         }
1867
1868
1869         spin_lock_bh(&exp->exp_bl_list_lock);
1870         cfs_list_for_each_entry(lock, &exp->exp_bl_list, l_exp_list) {
1871                 LASSERT(lock->l_flags & LDLM_FL_AST_SENT);
1872                 LASSERT(lock->l_resource->lr_type == LDLM_EXTENT);
1873
1874                 if (!ldlm_res_eq(&data->opd_resid, &lock->l_resource->lr_name))
1875                         continue;
1876
1877                 if (!ldlm_extent_overlap(&lock->l_policy_data.l_extent,
1878                                          &data->opd_extent))
1879                         continue;
1880
1881                 ost_prolong_lock_one(data, lock);
1882         }
1883         spin_unlock_bh(&exp->exp_bl_list_lock);
1884
1885         EXIT;
1886 }
1887
1888 /**
1889  * Returns 1 if the given PTLRPC matches the given LDLM locks, or 0 if it does
1890  * not.
1891  */
1892 static int ost_rw_hpreq_lock_match(struct ptlrpc_request *req,
1893                                    struct ldlm_lock *lock)
1894 {
1895         struct niobuf_remote *nb;
1896         struct obd_ioobj *ioo;
1897         int mode, opc;
1898         struct ldlm_extent ext;
1899         ENTRY;
1900
1901         opc = lustre_msg_get_opc(req->rq_reqmsg);
1902         LASSERT(opc == OST_READ || opc == OST_WRITE);
1903
1904         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
1905         LASSERT(ioo != NULL);
1906
1907         nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
1908         LASSERT(nb != NULL);
1909
1910         ext.start = nb->offset;
1911         nb += ioo->ioo_bufcnt - 1;
1912         ext.end = nb->offset + nb->len - 1;
1913
1914         LASSERT(lock->l_resource != NULL);
1915         if (!ostid_res_name_eq(&ioo->ioo_oid, &lock->l_resource->lr_name))
1916                 RETURN(0);
1917
1918         mode = LCK_PW;
1919         if (opc == OST_READ)
1920                 mode |= LCK_PR;
1921         if (!(lock->l_granted_mode & mode))
1922                 RETURN(0);
1923
1924         RETURN(ldlm_extent_overlap(&lock->l_policy_data.l_extent, &ext));
1925 }
1926
1927 /**
1928  * High-priority queue request check for whether the given PTLRPC request (\a
1929  * req) is blocking an LDLM lock cancel.
1930  *
1931  * Returns 1 if the given given PTLRPC request (\a req) is blocking an LDLM lock
1932  * cancel, 0 if it is not, and -EFAULT if the request is malformed.
1933  *
1934  * Only OST_READs, OST_WRITEs and OST_PUNCHes go on the h-p RPC queue.  This
1935  * function looks only at OST_READs and OST_WRITEs.
1936  */
1937 static int ost_rw_hpreq_check(struct ptlrpc_request *req)
1938 {
1939         struct obd_device *obd = req->rq_export->exp_obd;
1940         struct ost_body *body;
1941         struct obd_ioobj *ioo;
1942         struct niobuf_remote *nb;
1943         struct ost_prolong_data opd = { 0 };
1944         int mode, opc;
1945         ENTRY;
1946
1947         /*
1948          * Use LASSERT to do sanity check because malformed RPCs should have
1949          * been filtered out in ost_hpreq_handler().
1950          */
1951         opc = lustre_msg_get_opc(req->rq_reqmsg);
1952         LASSERT(opc == OST_READ || opc == OST_WRITE);
1953
1954         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
1955         LASSERT(body != NULL);
1956
1957         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
1958         LASSERT(ioo != NULL);
1959
1960         nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
1961         LASSERT(nb != NULL);
1962         LASSERT(!(nb->flags & OBD_BRW_SRVLOCK));
1963
1964         ostid_build_res_name(&ioo->ioo_oid, &opd.opd_resid);
1965
1966         opd.opd_req = req;
1967         mode = LCK_PW;
1968         if (opc == OST_READ)
1969                 mode |= LCK_PR;
1970         opd.opd_mode = mode;
1971         opd.opd_exp = req->rq_export;
1972         opd.opd_oa  = &body->oa;
1973         opd.opd_extent.start = nb->offset;
1974         nb += ioo->ioo_bufcnt - 1;
1975         opd.opd_extent.end = nb->offset + nb->len - 1;
1976         opd.opd_timeout = prolong_timeout(req);
1977
1978         DEBUG_REQ(D_RPCTRACE, req,
1979                "%s %s: refresh rw locks: " LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
1980                obd->obd_name, cfs_current()->comm,
1981                opd.opd_resid.name[0], opd.opd_resid.name[1],
1982                opd.opd_extent.start, opd.opd_extent.end);
1983
1984         ost_prolong_locks(&opd);
1985
1986         CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
1987                obd->obd_name, opd.opd_locks, req);
1988
1989         RETURN(opd.opd_locks > 0);
1990 }
1991
1992 static void ost_rw_hpreq_fini(struct ptlrpc_request *req)
1993 {
1994         (void)ost_rw_hpreq_check(req);
1995 }
1996
1997 /**
1998  * Like ost_rw_hpreq_lock_match(), but for OST_PUNCH RPCs.
1999  */
2000 static int ost_punch_hpreq_lock_match(struct ptlrpc_request *req,
2001                                       struct ldlm_lock *lock)
2002 {
2003         struct ost_body *body;
2004         ENTRY;
2005
2006         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2007         LASSERT(body != NULL);
2008
2009         if (body->oa.o_valid & OBD_MD_FLHANDLE &&
2010             body->oa.o_handle.cookie == lock->l_handle.h_cookie)
2011                 RETURN(1);
2012
2013         RETURN(0);
2014 }
2015
2016 /**
2017  * Like ost_rw_hpreq_check(), but for OST_PUNCH RPCs.
2018  */
2019 static int ost_punch_hpreq_check(struct ptlrpc_request *req)
2020 {
2021         struct obd_device *obd = req->rq_export->exp_obd;
2022         struct ost_body *body;
2023         struct obdo *oa;
2024         struct ost_prolong_data opd = { 0 };
2025         __u64 start, end;
2026         ENTRY;
2027
2028         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2029         LASSERT(body != NULL);
2030
2031         oa = &body->oa;
2032         LASSERT(!(oa->o_valid & OBD_MD_FLFLAGS) ||
2033                 !(oa->o_flags & OBD_FL_SRVLOCK));
2034
2035         start = oa->o_size;
2036         end = start + oa->o_blocks;
2037
2038         opd.opd_req = req;
2039         opd.opd_mode = LCK_PW;
2040         opd.opd_exp = req->rq_export;
2041         opd.opd_oa  = oa;
2042         opd.opd_extent.start = start;
2043         opd.opd_extent.end   = end;
2044         if (oa->o_blocks == OBD_OBJECT_EOF)
2045                 opd.opd_extent.end = OBD_OBJECT_EOF;
2046         opd.opd_timeout = prolong_timeout(req);
2047
2048         ostid_build_res_name(&oa->o_oi, &opd.opd_resid);
2049
2050         CDEBUG(D_DLMTRACE,
2051                "%s: refresh locks: "LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
2052                obd->obd_name,
2053                opd.opd_resid.name[0], opd.opd_resid.name[1],
2054                opd.opd_extent.start, opd.opd_extent.end);
2055
2056         ost_prolong_locks(&opd);
2057
2058         CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
2059                obd->obd_name, opd.opd_locks, req);
2060
2061         RETURN(opd.opd_locks > 0);
2062 }
2063
2064 static void ost_punch_hpreq_fini(struct ptlrpc_request *req)
2065 {
2066         (void)ost_punch_hpreq_check(req);
2067 }
2068
2069 struct ptlrpc_hpreq_ops ost_hpreq_rw = {
2070         .hpreq_lock_match = ost_rw_hpreq_lock_match,
2071         .hpreq_check      = ost_rw_hpreq_check,
2072         .hpreq_fini       = ost_rw_hpreq_fini
2073 };
2074
2075 struct ptlrpc_hpreq_ops ost_hpreq_punch = {
2076         .hpreq_lock_match = ost_punch_hpreq_lock_match,
2077         .hpreq_check      = ost_punch_hpreq_check,
2078         .hpreq_fini       = ost_punch_hpreq_fini
2079 };
2080
2081 /** Assign high priority operations to the request if needed. */
2082 static int ost_io_hpreq_handler(struct ptlrpc_request *req)
2083 {
2084         ENTRY;
2085         if (req->rq_export) {
2086                 int opc = lustre_msg_get_opc(req->rq_reqmsg);
2087                 struct ost_body *body;
2088
2089                 if (opc == OST_READ || opc == OST_WRITE) {
2090                         struct niobuf_remote *nb;
2091                         struct obd_ioobj *ioo;
2092                         int objcount, niocount;
2093                         int rc;
2094                         int i;
2095
2096                         /* RPCs on the H-P queue can be inspected before
2097                          * ost_handler() initializes their pills, so we
2098                          * initialize that here.  Capsule initialization is
2099                          * idempotent, as is setting the pill's format (provided
2100                          * it doesn't change).
2101                          */
2102                         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2103                         if (opc == OST_READ)
2104                                 req_capsule_set(&req->rq_pill,
2105                                                 &RQF_OST_BRW_READ);
2106                         else
2107                                 req_capsule_set(&req->rq_pill,
2108                                                 &RQF_OST_BRW_WRITE);
2109
2110                         body = req_capsule_client_get(&req->rq_pill,
2111                                                       &RMF_OST_BODY);
2112                         if (body == NULL) {
2113                                 CERROR("Missing/short ost_body\n");
2114                                 RETURN(-EFAULT);
2115                         }
2116
2117                         objcount = req_capsule_get_size(&req->rq_pill,
2118                                                         &RMF_OBD_IOOBJ,
2119                                                         RCL_CLIENT) /
2120                                                         sizeof(*ioo);
2121                         if (objcount == 0) {
2122                                 CERROR("Missing/short ioobj\n");
2123                                 RETURN(-EFAULT);
2124                         }
2125                         if (objcount > 1) {
2126                                 CERROR("too many ioobjs (%d)\n", objcount);
2127                                 RETURN(-EFAULT);
2128                         }
2129
2130                         ioo = req_capsule_client_get(&req->rq_pill,
2131                                                      &RMF_OBD_IOOBJ);
2132                         if (ioo == NULL) {
2133                                 CERROR("Missing/short ioobj\n");
2134                                 RETURN(-EFAULT);
2135                         }
2136
2137                         rc = ost_validate_obdo(req->rq_export, &body->oa, ioo);
2138                         if (rc) {
2139                                 CERROR("invalid object ids\n");
2140                                 RETURN(rc);
2141                         }
2142
2143                         for (niocount = i = 0; i < objcount; i++) {
2144                                 if (ioo[i].ioo_bufcnt == 0) {
2145                                         CERROR("ioo[%d] has zero bufcnt\n", i);
2146                                         RETURN(-EFAULT);
2147                                 }
2148                                 niocount += ioo[i].ioo_bufcnt;
2149                         }
2150                         if (niocount > PTLRPC_MAX_BRW_PAGES) {
2151                                 DEBUG_REQ(D_RPCTRACE, req,
2152                                           "bulk has too many pages (%d)",
2153                                           niocount);
2154                                 RETURN(-EFAULT);
2155                         }
2156
2157                         nb = req_capsule_client_get(&req->rq_pill,
2158                                                     &RMF_NIOBUF_REMOTE);
2159                         if (nb == NULL) {
2160                                 CERROR("Missing/short niobuf\n");
2161                                 RETURN(-EFAULT);
2162                         }
2163
2164                         if (niocount == 0 || !(nb[0].flags & OBD_BRW_SRVLOCK))
2165                                 req->rq_ops = &ost_hpreq_rw;
2166                 } else if (opc == OST_PUNCH) {
2167                         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2168                         req_capsule_set(&req->rq_pill, &RQF_OST_PUNCH);
2169
2170                         body = req_capsule_client_get(&req->rq_pill,
2171                                                       &RMF_OST_BODY);
2172                         if (body == NULL) {
2173                                 CERROR("Missing/short ost_body\n");
2174                                 RETURN(-EFAULT);
2175                         }
2176
2177                         if (!(body->oa.o_valid & OBD_MD_FLFLAGS) ||
2178                             !(body->oa.o_flags & OBD_FL_SRVLOCK))
2179                                 req->rq_ops = &ost_hpreq_punch;
2180                 }
2181         }
2182         RETURN(0);
2183 }
2184
2185 /* TODO: handle requests in a similar way as MDT: see mdt_handle_common() */
2186 int ost_handle(struct ptlrpc_request *req)
2187 {
2188         struct obd_trans_info trans_info = { 0, };
2189         struct obd_trans_info *oti = &trans_info;
2190         int should_process, fail = OBD_FAIL_OST_ALL_REPLY_NET, rc = 0;
2191         struct obd_device *obd = NULL;
2192         __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
2193         ENTRY;
2194
2195         /* OST module is kept between remounts, but the last reference
2196          * to specific module (say, osd or ofd) kills all related keys
2197          * from the environment. so we have to refill it until the root
2198          * cause is fixed properly */
2199         lu_env_refill(req->rq_svc_thread->t_env);
2200
2201         LASSERT(current->journal_info == NULL);
2202
2203         /* primordial rpcs don't affect server recovery */
2204         switch (opc) {
2205         case SEC_CTX_INIT:
2206         case SEC_CTX_INIT_CONT:
2207         case SEC_CTX_FINI:
2208                 GOTO(out, rc = 0);
2209         }
2210
2211         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2212
2213         if (opc != OST_CONNECT) {
2214                 if (!class_connected_export(req->rq_export)) {
2215                         CDEBUG(D_HA,"operation %d on unconnected OST from %s\n",
2216                                opc, libcfs_id2str(req->rq_peer));
2217                         req->rq_status = -ENOTCONN;
2218                         GOTO(out, rc = -ENOTCONN);
2219                 }
2220
2221                 obd = req->rq_export->exp_obd;
2222
2223                 /* Check for aborted recovery. */
2224                 if (obd->obd_recovering) {
2225                         rc = ost_filter_recovery_request(req, obd,
2226                                                          &should_process);
2227                         if (rc || !should_process)
2228                                 RETURN(rc);
2229                         else if (should_process < 0) {
2230                                 req->rq_status = should_process;
2231                                 rc = ptlrpc_error(req);
2232                                 RETURN(rc);
2233                         }
2234                 }
2235         }
2236
2237         oti_init(oti, req);
2238
2239         rc = ost_msg_check_version(req->rq_reqmsg);
2240         if (rc)
2241                 RETURN(rc);
2242
2243         if (req && req->rq_reqmsg && req->rq_export &&
2244             (exp_connect_flags(req->rq_export) & OBD_CONNECT_JOBSTATS))
2245                 oti->oti_jobid = lustre_msg_get_jobid(req->rq_reqmsg);
2246
2247         switch (opc) {
2248         case OST_CONNECT: {
2249                 CDEBUG(D_INODE, "connect\n");
2250                 req_capsule_set(&req->rq_pill, &RQF_OST_CONNECT);
2251                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_CONNECT_NET))
2252                         RETURN(0);
2253                 rc = target_handle_connect(req);
2254                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_CONNECT_NET2))
2255                         RETURN(0);
2256                 if (!rc) {
2257                         rc = ost_init_sec_level(req);
2258                         if (!rc)
2259                                 rc = ost_connect_check_sptlrpc(req);
2260                 }
2261                 break;
2262         }
2263         case OST_DISCONNECT:
2264                 CDEBUG(D_INODE, "disconnect\n");
2265                 req_capsule_set(&req->rq_pill, &RQF_OST_DISCONNECT);
2266                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_DISCONNECT_NET))
2267                         RETURN(0);
2268                 rc = target_handle_disconnect(req);
2269                 break;
2270         case OST_CREATE:
2271                 CDEBUG(D_INODE, "create\n");
2272                 req_capsule_set(&req->rq_pill, &RQF_OST_CREATE);
2273                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_CREATE_NET))
2274                         RETURN(0);
2275                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
2276                         GOTO(out, rc = -EROFS);
2277                 rc = ost_create(req->rq_export, req, oti);
2278                 break;
2279         case OST_DESTROY:
2280                 CDEBUG(D_INODE, "destroy\n");
2281                 req_capsule_set(&req->rq_pill, &RQF_OST_DESTROY);
2282                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_DESTROY_NET))
2283                         RETURN(0);
2284                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
2285                         GOTO(out, rc = -EROFS);
2286                 rc = ost_destroy(req->rq_export, req, oti);
2287                 break;
2288         case OST_GETATTR:
2289                 CDEBUG(D_INODE, "getattr\n");
2290                 req_capsule_set(&req->rq_pill, &RQF_OST_GETATTR);
2291                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_GETATTR_NET))
2292                         RETURN(0);
2293                 rc = ost_getattr(req->rq_export, req);
2294                 break;
2295         case OST_SETATTR:
2296                 CDEBUG(D_INODE, "setattr\n");
2297                 req_capsule_set(&req->rq_pill, &RQF_OST_SETATTR);
2298                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_SETATTR_NET))
2299                         RETURN(0);
2300                 rc = ost_setattr(req->rq_export, req, oti);
2301                 break;
2302         case OST_WRITE:
2303                 req_capsule_set(&req->rq_pill, &RQF_OST_BRW_WRITE);
2304                 CDEBUG(D_INODE, "write\n");
2305                 /* req->rq_request_portal would be nice, if it was set */
2306                 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL) {
2307                         CERROR("%s: deny write request from %s to portal %u\n",
2308                                req->rq_export->exp_obd->obd_name,
2309                                obd_export_nid2str(req->rq_export),
2310                                ptlrpc_req2svc(req)->srv_req_portal);
2311                         GOTO(out, rc = -EPROTO);
2312                 }
2313                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_NET))
2314                         RETURN(0);
2315                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOSPC))
2316                         GOTO(out, rc = -ENOSPC);
2317                 if (OBD_FAIL_TIMEOUT(OBD_FAIL_OST_EROFS, 1))
2318                         GOTO(out, rc = -EROFS);
2319                 rc = ost_brw_write(req, oti);
2320                 LASSERT(current->journal_info == NULL);
2321                 /* ost_brw_write sends its own replies */
2322                 RETURN(rc);
2323         case OST_READ:
2324                 req_capsule_set(&req->rq_pill, &RQF_OST_BRW_READ);
2325                 CDEBUG(D_INODE, "read\n");
2326                 /* req->rq_request_portal would be nice, if it was set */
2327                 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL) {
2328                         CERROR("%s: deny read request from %s to portal %u\n",
2329                                req->rq_export->exp_obd->obd_name,
2330                                obd_export_nid2str(req->rq_export),
2331                                ptlrpc_req2svc(req)->srv_req_portal);
2332                         GOTO(out, rc = -EPROTO);
2333                 }
2334                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_NET))
2335                         RETURN(0);
2336                 rc = ost_brw_read(req, oti);
2337                 LASSERT(current->journal_info == NULL);
2338                 /* ost_brw_read sends its own replies */
2339                 RETURN(rc);
2340         case OST_PUNCH:
2341                 CDEBUG(D_INODE, "punch\n");
2342                 req_capsule_set(&req->rq_pill, &RQF_OST_PUNCH);
2343                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_PUNCH_NET))
2344                         RETURN(0);
2345                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
2346                         GOTO(out, rc = -EROFS);
2347                 rc = ost_punch(req->rq_export, req, oti);
2348                 break;
2349         case OST_STATFS:
2350                 CDEBUG(D_INODE, "statfs\n");
2351                 req_capsule_set(&req->rq_pill, &RQF_OST_STATFS);
2352                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_STATFS_NET))
2353                         RETURN(0);
2354                 rc = ost_statfs(req);
2355                 break;
2356         case OST_SYNC:
2357                 CDEBUG(D_INODE, "sync\n");
2358                 req_capsule_set(&req->rq_pill, &RQF_OST_SYNC);
2359                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_SYNC_NET))
2360                         RETURN(0);
2361                 rc = ost_sync(req->rq_export, req, oti);
2362                 break;
2363         case OST_SET_INFO:
2364                 DEBUG_REQ(D_INODE, req, "set_info");
2365                 req_capsule_set(&req->rq_pill, &RQF_OBD_SET_INFO);
2366                 rc = ost_set_info(req->rq_export, req);
2367                 break;
2368         case OST_GET_INFO:
2369                 DEBUG_REQ(D_INODE, req, "get_info");
2370                 req_capsule_set(&req->rq_pill, &RQF_OST_GET_INFO_GENERIC);
2371                 rc = ost_get_info(req->rq_export, req);
2372                 break;
2373         case SEQ_QUERY:
2374                 CDEBUG(D_INODE, "seq\n");
2375                 rc = seq_handle(req);
2376                 break;
2377         case OST_QUOTACHECK:
2378                 CDEBUG(D_INODE, "quotacheck\n");
2379                 req_capsule_set(&req->rq_pill, &RQF_OST_QUOTACHECK);
2380                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_QUOTACHECK_NET))
2381                         RETURN(0);
2382                 rc = ost_handle_quotacheck(req);
2383                 break;
2384         case OST_QUOTACTL:
2385                 CDEBUG(D_INODE, "quotactl\n");
2386                 req_capsule_set(&req->rq_pill, &RQF_OST_QUOTACTL);
2387                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_QUOTACTL_NET))
2388                         RETURN(0);
2389                 rc = ost_handle_quotactl(req);
2390                 break;
2391         case OBD_PING:
2392                 DEBUG_REQ(D_INODE, req, "ping");
2393                 req_capsule_set(&req->rq_pill, &RQF_OBD_PING);
2394                 rc = target_handle_ping(req);
2395                 break;
2396         /* FIXME - just reply status */
2397         case LLOG_ORIGIN_CONNECT:
2398                 DEBUG_REQ(D_INODE, req, "log connect");
2399                 req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_CONNECT);
2400                 rc = ost_llog_handle_connect(req->rq_export, req);
2401                 req->rq_status = rc;
2402                 rc = req_capsule_server_pack(&req->rq_pill);
2403                 if (rc)
2404                         RETURN(rc);
2405                 RETURN(ptlrpc_reply(req));
2406         case OBD_LOG_CANCEL:
2407                 CDEBUG(D_INODE, "log cancel\n");
2408                 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
2409                 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
2410                         RETURN(0);
2411                 rc = llog_origin_handle_cancel(req);
2412                 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
2413                         RETURN(0);
2414                 req->rq_status = rc;
2415                 rc = req_capsule_server_pack(&req->rq_pill);
2416                 if (rc)
2417                         RETURN(rc);
2418                 RETURN(ptlrpc_reply(req));
2419         case LDLM_ENQUEUE:
2420                 CDEBUG(D_INODE, "enqueue\n");
2421                 req_capsule_set(&req->rq_pill, &RQF_LDLM_ENQUEUE);
2422                 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_NET))
2423                         RETURN(0);
2424                 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
2425                                          ost_blocking_ast,
2426                                          ldlm_server_glimpse_ast);
2427                 fail = OBD_FAIL_OST_LDLM_REPLY_NET;
2428                 break;
2429         case LDLM_CONVERT:
2430                 CDEBUG(D_INODE, "convert\n");
2431                 req_capsule_set(&req->rq_pill, &RQF_LDLM_CONVERT);
2432                 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CONVERT_NET))
2433                         RETURN(0);
2434                 rc = ldlm_handle_convert(req);
2435                 break;
2436         case LDLM_CANCEL:
2437                 CDEBUG(D_INODE, "cancel\n");
2438                 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
2439                 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_NET))
2440                         RETURN(0);
2441                 rc = ldlm_handle_cancel(req);
2442                 break;
2443         case LDLM_BL_CALLBACK:
2444         case LDLM_CP_CALLBACK:
2445                 CDEBUG(D_INODE, "callback\n");
2446                 CERROR("callbacks should not happen on OST\n");
2447                 /* fall through */
2448         default:
2449                 CERROR("Unexpected opcode %d\n", opc);
2450                 req->rq_status = -ENOTSUPP;
2451                 rc = ptlrpc_error(req);
2452                 RETURN(rc);
2453         }
2454
2455         LASSERT(current->journal_info == NULL);
2456
2457         EXIT;
2458         /* If we're DISCONNECTing, the export_data is already freed */
2459         if (!rc && opc != OST_DISCONNECT)
2460                 target_committed_to_req(req);
2461
2462 out:
2463         if (!rc)
2464                 oti_to_request(oti, req);
2465
2466         target_send_reply(req, rc, fail);
2467         return 0;
2468 }
2469 EXPORT_SYMBOL(ost_handle);
2470
2471 /*
2472  * free per-thread pool created by ost_io_thread_init().
2473  */
2474 static void ost_io_thread_done(struct ptlrpc_thread *thread)
2475 {
2476         struct ost_thread_local_cache *tls; /* TLS stands for Thread-Local
2477                                              * Storage */
2478
2479         ENTRY;
2480
2481         LASSERT(thread != NULL);
2482
2483         /*
2484          * be prepared to handle partially-initialized pools (because this is
2485          * called from ost_io_thread_init() for cleanup.
2486          */
2487         tls = thread->t_data;
2488         if (tls != NULL) {
2489                 OBD_FREE_PTR(tls);
2490                 thread->t_data = NULL;
2491         }
2492         EXIT;
2493 }
2494
2495 /*
2496  * initialize per-thread page pool (bug 5137).
2497  */
2498 static int ost_io_thread_init(struct ptlrpc_thread *thread)
2499 {
2500         struct ost_thread_local_cache *tls;
2501
2502         ENTRY;
2503
2504         LASSERT(thread != NULL);
2505         LASSERT(thread->t_data == NULL);
2506
2507         OBD_ALLOC_PTR(tls);
2508         if (tls == NULL)
2509                 RETURN(-ENOMEM);
2510         thread->t_data = tls;
2511         RETURN(0);
2512 }
2513
2514 #define OST_WATCHDOG_TIMEOUT (obd_timeout * 1000)
2515
2516 static struct cfs_cpt_table     *ost_io_cptable;
2517
2518 /* Sigh - really, this is an OSS, the _server_, not the _target_ */
2519 static int ost_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
2520 {
2521         static struct ptlrpc_service_conf       svc_conf;
2522         struct ost_obd *ost = &obd->u.ost;
2523         struct lprocfs_static_vars lvars;
2524         nodemask_t              *mask;
2525         int rc;
2526         ENTRY;
2527
2528         rc = cfs_cleanup_group_info();
2529         if (rc)
2530                 RETURN(rc);
2531
2532         lprocfs_ost_init_vars(&lvars);
2533         lprocfs_obd_setup(obd, lvars.obd_vars);
2534
2535         mutex_init(&ost->ost_health_mutex);
2536
2537         svc_conf = (typeof(svc_conf)) {
2538                 .psc_name               = LUSTRE_OSS_NAME,
2539                 .psc_watchdog_factor    = OSS_SERVICE_WATCHDOG_FACTOR,
2540                 .psc_buf                = {
2541                         .bc_nbufs               = OST_NBUFS,
2542                         .bc_buf_size            = OST_BUFSIZE,
2543                         .bc_req_max_size        = OST_MAXREQSIZE,
2544                         .bc_rep_max_size        = OST_MAXREPSIZE,
2545                         .bc_req_portal          = OST_REQUEST_PORTAL,
2546                         .bc_rep_portal          = OSC_REPLY_PORTAL,
2547                 },
2548                 .psc_thr                = {
2549                         .tc_thr_name            = "ll_ost",
2550                         .tc_thr_factor          = OSS_THR_FACTOR,
2551                         .tc_nthrs_init          = OSS_NTHRS_INIT,
2552                         .tc_nthrs_base          = OSS_NTHRS_BASE,
2553                         .tc_nthrs_max           = OSS_NTHRS_MAX,
2554                         .tc_nthrs_user          = oss_num_threads,
2555                         .tc_cpu_affinity        = 1,
2556                         .tc_ctx_tags            = LCT_DT_THREAD,
2557                 },
2558                 .psc_cpt                = {
2559                         .cc_pattern             = oss_cpts,
2560                 },
2561                 .psc_ops                = {
2562                         .so_req_handler         = ost_handle,
2563                         .so_req_printer         = target_print_req,
2564                         .so_hpreq_handler       = ptlrpc_hpreq_handler,
2565                 },
2566         };
2567         ost->ost_service = ptlrpc_register_service(&svc_conf,
2568                                                    obd->obd_proc_entry);
2569         if (IS_ERR(ost->ost_service)) {
2570                 rc = PTR_ERR(ost->ost_service);
2571                 CERROR("failed to start service: %d\n", rc);
2572                 GOTO(out_lprocfs, rc);
2573         }
2574
2575         memset(&svc_conf, 0, sizeof(svc_conf));
2576         svc_conf = (typeof(svc_conf)) {
2577                 .psc_name               = "ost_create",
2578                 .psc_watchdog_factor    = OSS_SERVICE_WATCHDOG_FACTOR,
2579                 .psc_buf                = {
2580                         .bc_nbufs               = OST_NBUFS,
2581                         .bc_buf_size            = OST_BUFSIZE,
2582                         .bc_req_max_size        = OST_MAXREQSIZE,
2583                         .bc_rep_max_size        = OST_MAXREPSIZE,
2584                         .bc_req_portal          = OST_CREATE_PORTAL,
2585                         .bc_rep_portal          = OSC_REPLY_PORTAL,
2586                 },
2587                 .psc_thr                = {
2588                         .tc_thr_name            = "ll_ost_create",
2589                         .tc_thr_factor          = OSS_CR_THR_FACTOR,
2590                         .tc_nthrs_init          = OSS_CR_NTHRS_INIT,
2591                         .tc_nthrs_base          = OSS_CR_NTHRS_BASE,
2592                         .tc_nthrs_max           = OSS_CR_NTHRS_MAX,
2593                         .tc_nthrs_user          = oss_num_create_threads,
2594                         .tc_cpu_affinity        = 1,
2595                         .tc_ctx_tags            = LCT_DT_THREAD,
2596                 },
2597                 .psc_cpt                = {
2598                         .cc_pattern             = oss_cpts,
2599                 },
2600                 .psc_ops                = {
2601                         .so_req_handler         = ost_handle,
2602                         .so_req_printer         = target_print_req,
2603                 },
2604         };
2605         ost->ost_create_service = ptlrpc_register_service(&svc_conf,
2606                                                           obd->obd_proc_entry);
2607         if (IS_ERR(ost->ost_create_service)) {
2608                 rc = PTR_ERR(ost->ost_create_service);
2609                 CERROR("failed to start OST create service: %d\n", rc);
2610                 GOTO(out_service, rc);
2611         }
2612
2613         mask = cfs_cpt_table->ctb_nodemask;
2614         /* event CPT feature is disabled in libcfs level by set partition
2615          * number to 1, we still want to set node affinity for io service */
2616         if (cfs_cpt_number(cfs_cpt_table) == 1 && nodes_weight(*mask) > 1) {
2617                 int     cpt = 0;
2618                 int     i;
2619
2620                 ost_io_cptable = cfs_cpt_table_alloc(nodes_weight(*mask));
2621                 for_each_node_mask(i, *mask) {
2622                         if (ost_io_cptable == NULL) {
2623                                 CWARN("OSS failed to create CPT table\n");
2624                                 break;
2625                         }
2626
2627                         rc = cfs_cpt_set_node(ost_io_cptable, cpt++, i);
2628                         if (!rc) {
2629                                 CWARN("OSS Failed to set node %d for"
2630                                       "IO CPT table\n", i);
2631                                 cfs_cpt_table_free(ost_io_cptable);
2632                                 ost_io_cptable = NULL;
2633                                 break;
2634                         }
2635                 }
2636         }
2637
2638         memset(&svc_conf, 0, sizeof(svc_conf));
2639         svc_conf = (typeof(svc_conf)) {
2640                 .psc_name               = "ost_io",
2641                 .psc_watchdog_factor    = OSS_SERVICE_WATCHDOG_FACTOR,
2642                 .psc_buf                = {
2643                         .bc_nbufs               = OST_NBUFS,
2644                         .bc_buf_size            = OST_IO_BUFSIZE,
2645                         .bc_req_max_size        = OST_IO_MAXREQSIZE,
2646                         .bc_rep_max_size        = OST_IO_MAXREPSIZE,
2647                         .bc_req_portal          = OST_IO_PORTAL,
2648                         .bc_rep_portal          = OSC_REPLY_PORTAL,
2649                 },
2650                 .psc_thr                = {
2651                         .tc_thr_name            = "ll_ost_io",
2652                         .tc_thr_factor          = OSS_THR_FACTOR,
2653                         .tc_nthrs_init          = OSS_NTHRS_INIT,
2654                         .tc_nthrs_base          = OSS_NTHRS_BASE,
2655                         .tc_nthrs_max           = OSS_NTHRS_MAX,
2656                         .tc_nthrs_user          = oss_num_threads,
2657                         .tc_cpu_affinity        = 1,
2658                         .tc_ctx_tags            = LCT_DT_THREAD,
2659                 },
2660                 .psc_cpt                = {
2661                         .cc_cptable             = ost_io_cptable,
2662                         .cc_pattern             = ost_io_cptable == NULL ?
2663                                                   oss_io_cpts : NULL,
2664                 },
2665                 .psc_ops                = {
2666                         .so_thr_init            = ost_io_thread_init,
2667                         .so_thr_done            = ost_io_thread_done,
2668                         .so_req_handler         = ost_handle,
2669                         .so_hpreq_handler       = ost_io_hpreq_handler,
2670                         .so_req_printer         = target_print_req,
2671                 },
2672         };
2673         ost->ost_io_service = ptlrpc_register_service(&svc_conf,
2674                                                       obd->obd_proc_entry);
2675         if (IS_ERR(ost->ost_io_service)) {
2676                 rc = PTR_ERR(ost->ost_io_service);
2677                 CERROR("failed to start OST I/O service: %d\n", rc);
2678                 ost->ost_io_service = NULL;
2679                 GOTO(out_create, rc);
2680         }
2681
2682         memset(&svc_conf, 0, sizeof(svc_conf));
2683         svc_conf = (typeof(svc_conf)) {
2684                 .psc_name               = "ost_seq",
2685                 .psc_watchdog_factor    = OSS_SERVICE_WATCHDOG_FACTOR,
2686                 .psc_buf                = {
2687                         .bc_nbufs               = OST_NBUFS,
2688                         .bc_buf_size            = OST_BUFSIZE,
2689                         .bc_req_max_size        = OST_MAXREQSIZE,
2690                         .bc_rep_max_size        = OST_MAXREPSIZE,
2691                         .bc_req_portal          = SEQ_DATA_PORTAL,
2692                         .bc_rep_portal          = OSC_REPLY_PORTAL,
2693                 },
2694                 .psc_thr                = {
2695                         .tc_thr_name            = "ll_ost_seq",
2696                         .tc_thr_factor          = OSS_CR_THR_FACTOR,
2697                         .tc_nthrs_init          = OSS_CR_NTHRS_INIT,
2698                         .tc_nthrs_base          = OSS_CR_NTHRS_BASE,
2699                         .tc_nthrs_max           = OSS_CR_NTHRS_MAX,
2700                         .tc_nthrs_user          = oss_num_create_threads,
2701                         .tc_cpu_affinity        = 1,
2702                         .tc_ctx_tags            = LCT_DT_THREAD,
2703                 },
2704
2705                 .psc_cpt                = {
2706                         .cc_pattern          = oss_cpts,
2707                 },
2708                 .psc_ops                = {
2709                         .so_req_handler         = ost_handle,
2710                         .so_req_printer         = target_print_req,
2711                         .so_hpreq_handler       = NULL,
2712                 },
2713         };
2714         ost->ost_seq_service = ptlrpc_register_service(&svc_conf,
2715                                                       obd->obd_proc_entry);
2716         if (IS_ERR(ost->ost_seq_service)) {
2717                 rc = PTR_ERR(ost->ost_seq_service);
2718                 CERROR("failed to start OST seq service: %d\n", rc);
2719                 ost->ost_seq_service = NULL;
2720                 GOTO(out_io, rc);
2721         }
2722
2723         ping_evictor_start();
2724
2725         RETURN(0);
2726 out_io:
2727         ptlrpc_unregister_service(ost->ost_io_service);
2728         ost->ost_io_service = NULL;
2729 out_create:
2730         ptlrpc_unregister_service(ost->ost_create_service);
2731         ost->ost_create_service = NULL;
2732 out_service:
2733         ptlrpc_unregister_service(ost->ost_service);
2734         ost->ost_service = NULL;
2735 out_lprocfs:
2736         lprocfs_obd_cleanup(obd);
2737         RETURN(rc);
2738 }
2739
2740 static int ost_cleanup(struct obd_device *obd)
2741 {
2742         struct ost_obd *ost = &obd->u.ost;
2743         int err = 0;
2744         ENTRY;
2745
2746         ping_evictor_stop();
2747
2748         /* there is no recovery for OST OBD, all recovery is controlled by
2749          * obdfilter OBD */
2750         LASSERT(obd->obd_recovering == 0);
2751         mutex_lock(&ost->ost_health_mutex);
2752         ptlrpc_unregister_service(ost->ost_service);
2753         ptlrpc_unregister_service(ost->ost_create_service);
2754         ptlrpc_unregister_service(ost->ost_io_service);
2755         ptlrpc_unregister_service(ost->ost_seq_service);
2756         ost->ost_service = NULL;
2757         ost->ost_create_service = NULL;
2758         ost->ost_io_service = NULL;
2759         ost->ost_seq_service = NULL;
2760
2761         mutex_unlock(&ost->ost_health_mutex);
2762
2763         lprocfs_obd_cleanup(obd);
2764
2765         if (ost_io_cptable != NULL) {
2766                 cfs_cpt_table_free(ost_io_cptable);
2767                 ost_io_cptable = NULL;
2768         }
2769
2770         RETURN(err);
2771 }
2772
2773 static int ost_health_check(const struct lu_env *env, struct obd_device *obd)
2774 {
2775         struct ost_obd *ost = &obd->u.ost;
2776         int rc = 0;
2777
2778         mutex_lock(&ost->ost_health_mutex);
2779         rc |= ptlrpc_service_health_check(ost->ost_service);
2780         rc |= ptlrpc_service_health_check(ost->ost_create_service);
2781         rc |= ptlrpc_service_health_check(ost->ost_io_service);
2782         mutex_unlock(&ost->ost_health_mutex);
2783
2784         /*
2785          * health_check to return 0 on healthy
2786          * and 1 on unhealthy.
2787          */
2788         if( rc != 0)
2789                 rc = 1;
2790
2791         return rc;
2792 }
2793
2794 struct ost_thread_local_cache *ost_tls(struct ptlrpc_request *r)
2795 {
2796         return (struct ost_thread_local_cache *)(r->rq_svc_thread->t_data);
2797 }
2798
2799 /* use obd ops to offer management infrastructure */
2800 static struct obd_ops ost_obd_ops = {
2801         .o_owner        = THIS_MODULE,
2802         .o_setup        = ost_setup,
2803         .o_cleanup      = ost_cleanup,
2804         .o_health_check = ost_health_check,
2805 };
2806
2807
2808 static int __init ost_init(void)
2809 {
2810         struct lprocfs_static_vars lvars;
2811         int rc;
2812         ENTRY;
2813
2814         ost_page_to_corrupt = cfs_alloc_page(CFS_ALLOC_STD);
2815
2816         lprocfs_ost_init_vars(&lvars);
2817         rc = class_register_type(&ost_obd_ops, NULL, lvars.module_vars,
2818                                  LUSTRE_OSS_NAME, NULL);
2819
2820         if (ost_num_threads != 0 && oss_num_threads == 0) {
2821                 LCONSOLE_INFO("ost_num_threads module parameter is deprecated, "
2822                               "use oss_num_threads instead or unset both for "
2823                               "dynamic thread startup\n");
2824                 oss_num_threads = ost_num_threads;
2825         }
2826
2827         RETURN(rc);
2828 }
2829
2830 static void /*__exit*/ ost_exit(void)
2831 {
2832         if (ost_page_to_corrupt)
2833                 page_cache_release(ost_page_to_corrupt);
2834
2835         class_unregister_type(LUSTRE_OSS_NAME);
2836 }
2837
2838 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2839 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
2840 MODULE_LICENSE("GPL");
2841
2842 module_init(ost_init);
2843 module_exit(ost_exit);