lustre/ost/ost_handler.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/ost/ost_handler.c
  37  *
  38  * Author: Peter J. Braam <braam@clusterfs.com>
  39  * Author: Phil Schwan <phil@clusterfs.com>
  40  */
  41
  42 #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 <linux/init.h>
  52 #include <lprocfs_status.h>
  53 #include <libcfs/list.h>
  54 #include "ost_internal.h"
  55
  56 static int oss_num_threads;
  57 CFS_MODULE_PARM(oss_num_threads, "i", int, 0444,
  58                 "number of OSS service threads to start");
  59
  60 static int ost_num_threads;
  61 CFS_MODULE_PARM(ost_num_threads, "i", int, 0444,
  62                 "number of OST service threads to start (deprecated)");
  63
  64 static int oss_num_create_threads;
  65 CFS_MODULE_PARM(oss_num_create_threads, "i", int, 0444,
  66                 "number of OSS create threads to start");
  67
  68 static char *oss_cpts;
  69 CFS_MODULE_PARM(oss_cpts, "s", charp, 0444,
  70                 "CPU partitions OSS threads should run on");
  71
  72 static char *oss_io_cpts;
  73 CFS_MODULE_PARM(oss_io_cpts, "s", charp, 0444,
  74                 "CPU partitions OSS IO threads should run on");
  75
  76 /*
  77  * this page is allocated statically when module is initializing
  78  * it is used to simulate data corruptions, see ost_checksum_bulk()
  79  * for details. as the original pages provided by the layers below
  80  * can be remain in the internal cache, we do not want to modify
  81  * them.
  82  */
  83 static struct page *ost_page_to_corrupt = NULL;
  84
  85 /**
  86  * Do not return server-side uid/gid to remote client
  87  */
  88 static void ost_drop_id(struct obd_export *exp, struct obdo *oa)
  89 {
  90         if (exp_connect_rmtclient(exp)) {
  91                 oa->o_uid = -1;
  92                 oa->o_gid = -1;
  93                 oa->o_valid &= ~(OBD_MD_FLUID | OBD_MD_FLGID);
  94         }
  95 }
  96
  97 /**
  98  * Validate oa from client.
  99  * If the request comes from 2.0 clients, currently only RSVD seq and IDIF
 100  * req are valid.
 101  *    a. for single MDS  seq = FID_SEQ_OST_MDT0,
 102  *    b. for CMD, seq = FID_SEQ_OST_MDT0, FID_SEQ_OST_MDT1 - FID_SEQ_OST_MAX
 103  */
 104 static int ost_validate_obdo(struct obd_export *exp, struct obdo *oa,
 105                              struct obd_ioobj *ioobj)
 106 {
 107         if (oa != NULL && !(oa->o_valid & OBD_MD_FLGROUP)) {
 108                 oa->o_seq = FID_SEQ_OST_MDT0;
 109                 if (ioobj)
 110                         ioobj->ioo_seq = FID_SEQ_OST_MDT0;
 111         /* remove fid_seq_is_rsvd() after FID-on-OST allows SEQ > 9 */
 112         } else if (oa == NULL || !(fid_seq_is_rsvd(oa->o_seq) ||
 113                                    fid_seq_is_mdt0(oa->o_seq))) {
 114                 CERROR("%s: client %s sent invalid object "POSTID"\n",
 115                        exp->exp_obd->obd_name, obd_export_nid2str(exp),
 116                        oa ? oa->o_id : -1, oa ? oa->o_seq : -1);
 117                 return -EPROTO;
 118         }
 119         obdo_from_ostid(oa, &oa->o_oi);
 120         if (ioobj)
 121                 ioobj_from_obdo(ioobj, oa);
 122         return 0;
 123 }
 124
 125 void oti_to_request(struct obd_trans_info *oti, struct ptlrpc_request *req)
 126 {
 127         struct oti_req_ack_lock *ack_lock;
 128         int i;
 129
 130         if (oti == NULL)
 131                 return;
 132
 133         if (req->rq_repmsg) {
 134                 __u64 versions[PTLRPC_NUM_VERSIONS] = { 0 };
 135                 lustre_msg_set_transno(req->rq_repmsg, oti->oti_transno);
 136                 versions[0] = oti->oti_pre_version;
 137                 lustre_msg_set_versions(req->rq_repmsg, versions);
 138         }
 139         req->rq_transno = oti->oti_transno;
 140
 141         /* XXX 4 == entries in oti_ack_locks??? */
 142         for (ack_lock = oti->oti_ack_locks, i = 0; i < 4; i++, ack_lock++) {
 143                 if (!ack_lock->mode)
 144                         break;
 145                 /* XXX not even calling target_send_reply in some cases... */
 146                 ptlrpc_save_lock (req, &ack_lock->lock, ack_lock->mode, 0);
 147         }
 148 }
 149
 150 static int ost_destroy(struct obd_export *exp, struct ptlrpc_request *req,
 151                        struct obd_trans_info *oti)
 152 {
 153         struct ost_body *body, *repbody;
 154         struct lustre_capa *capa = NULL;
 155         int rc;
 156         ENTRY;
 157
 158         /* Get the request body */
 159         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 160         if (body == NULL)
 161                 RETURN(-EFAULT);
 162
 163         if (body->oa.o_id == 0)
 164                 RETURN(-EPROTO);
 165
 166         rc = ost_validate_obdo(exp, &body->oa, NULL);
 167         if (rc)
 168                 RETURN(rc);
 169
 170         /* If there's a DLM request, cancel the locks mentioned in it*/
 171         if (req_capsule_field_present(&req->rq_pill, &RMF_DLM_REQ, RCL_CLIENT)) {
 172                 struct ldlm_request *dlm;
 173
 174                 dlm = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
 175                 if (dlm == NULL)
 176                         RETURN (-EFAULT);
 177                 ldlm_request_cancel(req, dlm, 0);
 178         }
 179
 180         /* If there's a capability, get it */
 181         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 182                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 183                 if (capa == NULL) {
 184                         CERROR("Missing capability for OST DESTROY");
 185                         RETURN (-EFAULT);
 186                 }
 187         }
 188
 189         /* Prepare the reply */
 190         rc = req_capsule_server_pack(&req->rq_pill);
 191         if (rc)
 192                 RETURN(rc);
 193
 194         /* Get the log cancellation cookie */
 195         if (body->oa.o_valid & OBD_MD_FLCOOKIE)
 196                 oti->oti_logcookies = &body->oa.o_lcookie;
 197
 198         /* Finish the reply */
 199         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 200         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 201
 202         /* Do the destroy and set the reply status accordingly  */
 203         req->rq_status = obd_destroy(req->rq_svc_thread->t_env, exp,
 204                                      &repbody->oa, NULL, oti, NULL, capa);
 205         RETURN(0);
 206 }
 207
 208 /**
 209  * Helper function for getting server side [start, start+count] DLM lock
 210  * if asked by client.
 211  */
 212 static int ost_lock_get(struct obd_export *exp, struct obdo *oa,
 213                         __u64 start, __u64 count, struct lustre_handle *lh,
 214                         int mode, __u64 flags)
 215 {
 216         struct ldlm_res_id res_id;
 217         ldlm_policy_data_t policy;
 218         __u64 end = start + count;
 219
 220         ENTRY;
 221
 222         LASSERT(!lustre_handle_is_used(lh));
 223         /* o_id and o_gr are used for localizing resource, if client miss to set
 224          * them, do not trigger ASSERTION. */
 225         if (unlikely((oa->o_valid & (OBD_MD_FLID | OBD_MD_FLGROUP)) !=
 226                      (OBD_MD_FLID | OBD_MD_FLGROUP)))
 227                 RETURN(-EPROTO);
 228
 229         if (!(oa->o_valid & OBD_MD_FLFLAGS) ||
 230             !(oa->o_flags & OBD_FL_SRVLOCK))
 231                 RETURN(0);
 232
 233         osc_build_res_name(oa->o_id, oa->o_seq, &res_id);
 234         CDEBUG(D_INODE, "OST-side extent lock.\n");
 235
 236         policy.l_extent.start = start & CFS_PAGE_MASK;
 237
 238         /* If ->o_blocks is EOF it means "lock till the end of the
 239          * file". Otherwise, it's size of a hole being punched (in bytes) */
 240         if (count == OBD_OBJECT_EOF || end < start)
 241                 policy.l_extent.end = OBD_OBJECT_EOF;
 242         else
 243                 policy.l_extent.end = end | ~CFS_PAGE_MASK;
 244
 245         RETURN(ldlm_cli_enqueue_local(exp->exp_obd->obd_namespace, &res_id,
 246                                       LDLM_EXTENT, &policy, mode, &flags,
 247                                       ldlm_blocking_ast, ldlm_completion_ast,
 248                                       ldlm_glimpse_ast, NULL, 0, NULL, lh));
 249 }
 250
 251 /* Helper function: release lock, if any. */
 252 static void ost_lock_put(struct obd_export *exp,
 253                          struct lustre_handle *lh, int mode)
 254 {
 255         ENTRY;
 256         if (lustre_handle_is_used(lh))
 257                 ldlm_lock_decref(lh, mode);
 258         EXIT;
 259 }
 260
 261 static int ost_getattr(struct obd_export *exp, struct ptlrpc_request *req)
 262 {
 263         struct ost_body *body, *repbody;
 264         struct obd_info *oinfo;
 265         struct lustre_handle lh = { 0 };
 266         struct lustre_capa *capa = NULL;
 267         int rc;
 268         ENTRY;
 269
 270         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 271         if (body == NULL)
 272                 RETURN(-EFAULT);
 273
 274         rc = ost_validate_obdo(exp, &body->oa, NULL);
 275         if (rc)
 276                 RETURN(rc);
 277
 278         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 279                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 280                 if (capa == NULL) {
 281                         CERROR("Missing capability for OST GETATTR");
 282                         RETURN(-EFAULT);
 283                 }
 284         }
 285
 286         rc = req_capsule_server_pack(&req->rq_pill);
 287         if (rc)
 288                 RETURN(rc);
 289
 290         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 291         repbody->oa = body->oa;
 292
 293         rc = ost_lock_get(exp, &repbody->oa, 0, OBD_OBJECT_EOF, &lh, LCK_PR, 0);
 294         if (rc)
 295                 RETURN(rc);
 296
 297         OBD_ALLOC_PTR(oinfo);
 298         if (!oinfo)
 299                 GOTO(unlock, rc = -ENOMEM);
 300         oinfo->oi_oa = &repbody->oa;
 301         oinfo->oi_capa = capa;
 302
 303         req->rq_status = obd_getattr(req->rq_svc_thread->t_env, exp, oinfo);
 304
 305         OBD_FREE_PTR(oinfo);
 306
 307         ost_drop_id(exp, &repbody->oa);
 308
 309 unlock:
 310         ost_lock_put(exp, &lh, LCK_PR);
 311         RETURN(rc);
 312 }
 313
 314 static int ost_statfs(struct ptlrpc_request *req)
 315 {
 316         struct obd_statfs *osfs;
 317         int rc;
 318         ENTRY;
 319
 320         rc = req_capsule_server_pack(&req->rq_pill);
 321         if (rc)
 322                 RETURN(rc);
 323
 324         osfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
 325
 326         req->rq_status = obd_statfs(req->rq_svc_thread->t_env, req->rq_export,
 327                                     osfs,
 328                                     cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 329                                     0);
 330         if (req->rq_status != 0)
 331                 CERROR("ost: statfs failed: rc %d\n", req->rq_status);
 332
 333         if (OBD_FAIL_CHECK(OBD_FAIL_OST_STATFS_EINPROGRESS))
 334                 req->rq_status = -EINPROGRESS;
 335
 336         RETURN(0);
 337 }
 338
 339 static int ost_create(struct obd_export *exp, struct ptlrpc_request *req,
 340                       struct obd_trans_info *oti)
 341 {
 342         struct ost_body *body, *repbody;
 343         int rc;
 344         ENTRY;
 345
 346         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 347         if (body == NULL)
 348                 RETURN(-EFAULT);
 349
 350         rc = ost_validate_obdo(req->rq_export, &body->oa, NULL);
 351         if (rc)
 352                 RETURN(rc);
 353
 354         rc = req_capsule_server_pack(&req->rq_pill);
 355         if (rc)
 356                 RETURN(rc);
 357
 358         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 359         repbody->oa = body->oa;
 360         oti->oti_logcookies = &body->oa.o_lcookie;
 361
 362         req->rq_status = obd_create(req->rq_svc_thread->t_env, exp,
 363                                     &repbody->oa, NULL, oti);
 364         //obd_log_cancel(conn, NULL, 1, oti->oti_logcookies, 0);
 365         RETURN(0);
 366 }
 367
 368 static int ost_punch(struct obd_export *exp, struct ptlrpc_request *req,
 369                      struct obd_trans_info *oti)
 370 {
 371         struct ost_body *body, *repbody;
 372         __u64 flags = 0;
 373         struct lustre_handle lh = {0,};
 374         int rc;
 375         ENTRY;
 376
 377         /* check that we do support OBD_CONNECT_TRUNCLOCK. */
 378         CLASSERT(OST_CONNECT_SUPPORTED & OBD_CONNECT_TRUNCLOCK);
 379
 380         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 381         if (body == NULL)
 382                 RETURN(-EFAULT);
 383
 384         rc = ost_validate_obdo(exp, &body->oa, NULL);
 385         if (rc)
 386                 RETURN(rc);
 387
 388         if ((body->oa.o_valid & (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS)) !=
 389             (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS))
 390                 RETURN(-EPROTO);
 391
 392         rc = req_capsule_server_pack(&req->rq_pill);
 393         if (rc)
 394                 RETURN(rc);
 395
 396         /* standard truncate optimization: if file body is completely
 397          * destroyed, don't send data back to the server. */
 398         if (body->oa.o_size == 0)
 399                 flags |= LDLM_AST_DISCARD_DATA;
 400
 401         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 402         repbody->oa = body->oa;
 403
 404         rc = ost_lock_get(exp, &repbody->oa, repbody->oa.o_size,
 405                           repbody->oa.o_blocks, &lh, LCK_PW, flags);
 406         if (rc == 0) {
 407                 struct obd_info *oinfo;
 408                 struct lustre_capa *capa = NULL;
 409
 410                 if (repbody->oa.o_valid & OBD_MD_FLFLAGS &&
 411                     repbody->oa.o_flags == OBD_FL_SRVLOCK)
 412                         /*
 413                          * If OBD_FL_SRVLOCK is the only bit set in
 414                          * ->o_flags, clear OBD_MD_FLFLAGS to avoid falling
 415                          * through filter_setattr() to filter_iocontrol().
 416                          */
 417                         repbody->oa.o_valid &= ~OBD_MD_FLFLAGS;
 418
 419                 if (repbody->oa.o_valid & OBD_MD_FLOSSCAPA) {
 420                         capa = req_capsule_client_get(&req->rq_pill,
 421                                                       &RMF_CAPA1);
 422                         if (capa == NULL) {
 423                                 CERROR("Missing capability for OST PUNCH");
 424                                 GOTO(unlock, rc = -EFAULT);
 425                         }
 426                 }
 427
 428                 OBD_ALLOC_PTR(oinfo);
 429                 if (!oinfo)
 430                         GOTO(unlock, rc = -ENOMEM);
 431                 oinfo->oi_oa = &repbody->oa;
 432                 oinfo->oi_policy.l_extent.start = oinfo->oi_oa->o_size;
 433                 oinfo->oi_policy.l_extent.end = oinfo->oi_oa->o_blocks;
 434                 oinfo->oi_capa = capa;
 435                 oinfo->oi_flags = OBD_FL_PUNCH;
 436
 437                 req->rq_status = obd_punch(req->rq_svc_thread->t_env, exp,
 438                                            oinfo, oti, NULL);
 439                 OBD_FREE_PTR(oinfo);
 440 unlock:
 441                 ost_lock_put(exp, &lh, LCK_PW);
 442         }
 443
 444         ost_drop_id(exp, &repbody->oa);
 445         RETURN(rc);
 446 }
 447
 448 static int ost_sync(struct obd_export *exp, struct ptlrpc_request *req,
 449                     struct obd_trans_info *oti)
 450 {
 451         struct ost_body *body, *repbody;
 452         struct obd_info *oinfo;
 453         struct lustre_capa *capa = NULL;
 454         int rc;
 455         ENTRY;
 456
 457         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 458         if (body == NULL)
 459                 RETURN(-EFAULT);
 460
 461         rc = ost_validate_obdo(exp, &body->oa, NULL);
 462         if (rc)
 463                 RETURN(rc);
 464
 465         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 466                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 467                 if (capa == NULL) {
 468                         CERROR("Missing capability for OST SYNC");
 469                         RETURN (-EFAULT);
 470                 }
 471         }
 472
 473         rc = req_capsule_server_pack(&req->rq_pill);
 474         if (rc)
 475                 RETURN(rc);
 476
 477         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 478         repbody->oa = body->oa;
 479
 480         OBD_ALLOC_PTR(oinfo);
 481         if (!oinfo)
 482                 RETURN(-ENOMEM);
 483
 484         oinfo->oi_oa = &repbody->oa;
 485         oinfo->oi_capa = capa;
 486         oinfo->oi_jobid = oti->oti_jobid;
 487         req->rq_status = obd_sync(req->rq_svc_thread->t_env, exp, oinfo,
 488                                   repbody->oa.o_size, repbody->oa.o_blocks,
 489                                   NULL);
 490         OBD_FREE_PTR(oinfo);
 491
 492         ost_drop_id(exp, &repbody->oa);
 493         RETURN(0);
 494 }
 495
 496 static int ost_setattr(struct obd_export *exp, struct ptlrpc_request *req,
 497                        struct obd_trans_info *oti)
 498 {
 499         struct ost_body *body, *repbody;
 500         struct obd_info *oinfo;
 501         struct lustre_capa *capa = NULL;
 502         int rc;
 503         ENTRY;
 504
 505         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 506         if (body == NULL)
 507                 RETURN(-EFAULT);
 508
 509         rc = ost_validate_obdo(req->rq_export, &body->oa, NULL);
 510         if (rc)
 511                 RETURN(rc);
 512
 513         rc = req_capsule_server_pack(&req->rq_pill);
 514         if (rc)
 515                 RETURN(rc);
 516
 517         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 518                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 519                 if (capa == NULL) {
 520                         CERROR("Missing capability for OST SETATTR");
 521                         RETURN (-EFAULT);
 522                 }
 523         }
 524
 525         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 526         repbody->oa = body->oa;
 527
 528         OBD_ALLOC_PTR(oinfo);
 529         if (!oinfo)
 530                 RETURN(-ENOMEM);
 531         oinfo->oi_oa = &repbody->oa;
 532         oinfo->oi_capa = capa;
 533
 534         req->rq_status = obd_setattr(req->rq_svc_thread->t_env, exp, oinfo,
 535                                      oti);
 536
 537         OBD_FREE_PTR(oinfo);
 538
 539         ost_drop_id(exp, &repbody->oa);
 540         RETURN(0);
 541 }
 542
 543 static __u32 ost_checksum_bulk(struct ptlrpc_bulk_desc *desc, int opc,
 544                                cksum_type_t cksum_type)
 545 {
 546         struct cfs_crypto_hash_desc     *hdesc;
 547         unsigned int                    bufsize;
 548         int                             i, err;
 549         unsigned char                   cfs_alg = cksum_obd2cfs(cksum_type);
 550         __u32                           cksum;
 551
 552         hdesc = cfs_crypto_hash_init(cfs_alg, NULL, 0);
 553         if (IS_ERR(hdesc)) {
 554                 CERROR("Unable to initialize checksum hash %s\n",
 555                        cfs_crypto_hash_name(cfs_alg));
 556                 return PTR_ERR(hdesc);
 557         }
 558         CDEBUG(D_INFO, "Checksum for algo %s\n", cfs_crypto_hash_name(cfs_alg));
 559         for (i = 0; i < desc->bd_iov_count; i++) {
 560
 561                 /* corrupt the data before we compute the checksum, to
 562                  * simulate a client->OST data error */
 563                 if (i == 0 && opc == OST_WRITE &&
 564                     OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
 565                         int off = desc->bd_iov[i].kiov_offset & ~CFS_PAGE_MASK;
 566                         int len = desc->bd_iov[i].kiov_len;
 567                         struct page *np = ost_page_to_corrupt;
 568                         char *ptr = kmap(desc->bd_iov[i].kiov_page) + off;
 569
 570                         if (np) {
 571                                 char *ptr2 = kmap(np) + off;
 572
 573                                 memcpy(ptr2, ptr, len);
 574                                 memcpy(ptr2, "bad3", min(4, len));
 575                                 kunmap(np);
 576                                 desc->bd_iov[i].kiov_page = np;
 577                         } else {
 578                                 CERROR("can't alloc page for corruption\n");
 579                         }
 580                 }
 581                 cfs_crypto_hash_update_page(hdesc, desc->bd_iov[i].kiov_page,
 582                                   desc->bd_iov[i].kiov_offset & ~CFS_PAGE_MASK,
 583                                   desc->bd_iov[i].kiov_len);
 584
 585                  /* corrupt the data after we compute the checksum, to
 586                  * simulate an OST->client data error */
 587                 if (i == 0 && opc == OST_READ &&
 588                     OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND)) {
 589                         int off = desc->bd_iov[i].kiov_offset & ~CFS_PAGE_MASK;
 590                         int len = desc->bd_iov[i].kiov_len;
 591                         struct page *np = ost_page_to_corrupt;
 592                         char *ptr = kmap(desc->bd_iov[i].kiov_page) + off;
 593
 594                         if (np) {
 595                                 char *ptr2 = kmap(np) + off;
 596
 597                                 memcpy(ptr2, ptr, len);
 598                                 memcpy(ptr2, "bad4", min(4, len));
 599                                 kunmap(np);
 600                                 desc->bd_iov[i].kiov_page = np;
 601                         } else {
 602                                 CERROR("can't alloc page for corruption\n");
 603                         }
 604                 }
 605         }
 606
 607         bufsize = 4;
 608         err = cfs_crypto_hash_final(hdesc, (unsigned char *)&cksum, &bufsize);
 609         if (err)
 610                 cfs_crypto_hash_final(hdesc, NULL, NULL);
 611
 612         return cksum;
 613 }
 614
 615 static int ost_brw_lock_get(int mode, struct obd_export *exp,
 616                             struct obd_ioobj *obj, struct niobuf_remote *nb,
 617                             struct lustre_handle *lh)
 618 {
 619         __u64 flags               = 0;
 620         int nrbufs                = obj->ioo_bufcnt;
 621         struct ldlm_res_id res_id;
 622         ldlm_policy_data_t policy;
 623         int i;
 624         ENTRY;
 625
 626         osc_build_res_name(obj->ioo_id, obj->ioo_seq, &res_id);
 627         LASSERT(mode == LCK_PR || mode == LCK_PW);
 628         LASSERT(!lustre_handle_is_used(lh));
 629
 630         if (nrbufs == 0 || !(nb[0].flags & OBD_BRW_SRVLOCK))
 631                 RETURN(0);
 632
 633         for (i = 1; i < nrbufs; i ++)
 634                 if ((nb[0].flags & OBD_BRW_SRVLOCK) !=
 635                     (nb[i].flags & OBD_BRW_SRVLOCK))
 636                         RETURN(-EFAULT);
 637
 638         policy.l_extent.start = nb[0].offset & CFS_PAGE_MASK;
 639         policy.l_extent.end   = (nb[nrbufs - 1].offset +
 640                                  nb[nrbufs - 1].len - 1) | ~CFS_PAGE_MASK;
 641
 642         RETURN(ldlm_cli_enqueue_local(exp->exp_obd->obd_namespace, &res_id,
 643                                       LDLM_EXTENT, &policy, mode, &flags,
 644                                       ldlm_blocking_ast, ldlm_completion_ast,
 645                                       ldlm_glimpse_ast, NULL, 0, NULL, lh));
 646 }
 647
 648 static void ost_brw_lock_put(int mode,
 649                              struct obd_ioobj *obj, struct niobuf_remote *niob,
 650                              struct lustre_handle *lh)
 651 {
 652         ENTRY;
 653         LASSERT(mode == LCK_PR || mode == LCK_PW);
 654         LASSERT((obj->ioo_bufcnt > 0 && (niob[0].flags & OBD_BRW_SRVLOCK)) ==
 655                 lustre_handle_is_used(lh));
 656         if (lustre_handle_is_used(lh))
 657                 ldlm_lock_decref(lh, mode);
 658         EXIT;
 659 }
 660
 661 /* Allocate thread local buffers if needed */
 662 static struct ost_thread_local_cache *ost_tls_get(struct ptlrpc_request *r)
 663 {
 664         struct ost_thread_local_cache *tls =
 665                 (struct ost_thread_local_cache *)(r->rq_svc_thread->t_data);
 666
 667         /* In normal mode of operation an I/O request is serviced only
 668          * by ll_ost_io threads each of them has own tls buffers allocated by
 669          * ost_io_thread_init().
 670          * During recovery, an I/O request may be queued until any of the ost
 671          * service threads process it. Not necessary it should be one of
 672          * ll_ost_io threads. In that case we dynamically allocating tls
 673          * buffers for the request service time. */
 674         if (unlikely(tls == NULL)) {
 675                 LASSERT(r->rq_export->exp_in_recovery);
 676                 OBD_ALLOC_PTR(tls);
 677                 if (tls != NULL) {
 678                         tls->temporary = 1;
 679                         r->rq_svc_thread->t_data = tls;
 680                 }
 681         }
 682         return  tls;
 683 }
 684
 685 /* Free thread local buffers if they were allocated only for servicing
 686  * this one request */
 687 static void ost_tls_put(struct ptlrpc_request *r)
 688 {
 689         struct ost_thread_local_cache *tls =
 690                 (struct ost_thread_local_cache *)(r->rq_svc_thread->t_data);
 691
 692         if (unlikely(tls->temporary)) {
 693                 OBD_FREE_PTR(tls);
 694                 r->rq_svc_thread->t_data = NULL;
 695         }
 696 }
 697
 698 static int ost_brw_read(struct ptlrpc_request *req, struct obd_trans_info *oti)
 699 {
 700         struct ptlrpc_bulk_desc *desc = NULL;
 701         struct obd_export *exp = req->rq_export;
 702         struct niobuf_remote *remote_nb;
 703         struct niobuf_local *local_nb;
 704         struct obd_ioobj *ioo;
 705         struct ost_body *body, *repbody;
 706         struct lustre_capa *capa = NULL;
 707         struct l_wait_info lwi;
 708         struct lustre_handle lockh = { 0 };
 709         int niocount, npages, nob = 0, rc, i;
 710         int no_reply = 0;
 711         struct ost_thread_local_cache *tls;
 712         ENTRY;
 713
 714         req->rq_bulk_read = 1;
 715
 716         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
 717                 GOTO(out, rc = -EIO);
 718
 719         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, (obd_timeout + 1) / 4);
 720
 721         /* Check if there is eviction in progress, and if so, wait for it to
 722          * finish */
 723         if (unlikely(cfs_atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
 724                 lwi = LWI_INTR(NULL, NULL); // We do not care how long it takes
 725                 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
 726                         !cfs_atomic_read(&exp->exp_obd->obd_evict_inprogress),
 727                         &lwi);
 728         }
 729         if (exp->exp_failed)
 730                 GOTO(out, rc = -ENOTCONN);
 731
 732         /* ost_body, ioobj & noibuf_remote are verified and swabbed in
 733          * ost_rw_hpreq_check(). */
 734         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 735         if (body == NULL)
 736                 GOTO(out, rc = -EFAULT);
 737
 738         /*
 739          * A req_capsule_X_get_array(pill, field, ptr_to_element_count) function
 740          * would be useful here and wherever we get &RMF_OBD_IOOBJ and
 741          * &RMF_NIOBUF_REMOTE.
 742          */
 743         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
 744         if (ioo == NULL)
 745                 GOTO(out, rc = -EFAULT);
 746
 747         rc = ost_validate_obdo(exp, &body->oa, ioo);
 748         if (rc)
 749                 RETURN(rc);
 750
 751         niocount = ioo->ioo_bufcnt;
 752         remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
 753         if (remote_nb == NULL)
 754                 GOTO(out, rc = -EFAULT);
 755
 756         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 757                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 758                 if (capa == NULL) {
 759                         CERROR("Missing capability for OST BRW READ");
 760                         GOTO(out, rc = -EFAULT);
 761                 }
 762         }
 763
 764         rc = req_capsule_server_pack(&req->rq_pill);
 765         if (rc)
 766                 GOTO(out, rc);
 767
 768         tls = ost_tls_get(req);
 769         if (tls == NULL)
 770                 GOTO(out_bulk, rc = -ENOMEM);
 771         local_nb = tls->local;
 772
 773         rc = ost_brw_lock_get(LCK_PR, exp, ioo, remote_nb, &lockh);
 774         if (rc != 0)
 775                 GOTO(out_tls, rc);
 776
 777         /*
 778          * If getting the lock took more time than
 779          * client was willing to wait, drop it. b=11330
 780          */
 781         if (cfs_time_current_sec() > req->rq_deadline ||
 782             OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
 783                 no_reply = 1;
 784                 CERROR("Dropping timed-out read from %s because locking"
 785                        "object "LPX64" took %ld seconds (limit was %ld).\n",
 786                        libcfs_id2str(req->rq_peer), ioo->ioo_id,
 787                        cfs_time_current_sec() - req->rq_arrival_time.tv_sec,
 788                        req->rq_deadline - req->rq_arrival_time.tv_sec);
 789                 GOTO(out_lock, rc = -ETIMEDOUT);
 790         }
 791
 792         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
 793         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 794
 795         npages = OST_THREAD_POOL_SIZE;
 796         rc = obd_preprw(req->rq_svc_thread->t_env, OBD_BRW_READ, exp,
 797                         &repbody->oa, 1, ioo, remote_nb, &npages, local_nb,
 798                         oti, capa);
 799         if (rc != 0)
 800                 GOTO(out_lock, rc);
 801
 802         desc = ptlrpc_prep_bulk_exp(req, npages,
 803                                      BULK_PUT_SOURCE, OST_BULK_PORTAL);
 804         if (desc == NULL)
 805                 GOTO(out_commitrw, rc = -ENOMEM);
 806
 807         nob = 0;
 808         for (i = 0; i < npages; i++) {
 809                 int page_rc = local_nb[i].rc;
 810
 811                 if (page_rc < 0) {              /* error */
 812                         rc = page_rc;
 813                         break;
 814                 }
 815
 816                 nob += page_rc;
 817                 if (page_rc != 0) {             /* some data! */
 818                         LASSERT (local_nb[i].page != NULL);
 819                         ptlrpc_prep_bulk_page_nopin(desc, local_nb[i].page,
 820                                                     local_nb[i].lnb_page_offset,
 821                                                     page_rc);
 822                 }
 823
 824                 if (page_rc != local_nb[i].len) { /* short read */
 825                         /* All subsequent pages should be 0 */
 826                         while(++i < npages)
 827                                 LASSERT(local_nb[i].rc == 0);
 828                         break;
 829                 }
 830         }
 831
 832         if (body->oa.o_valid & OBD_MD_FLCKSUM) {
 833                 cksum_type_t cksum_type =
 834                         cksum_type_unpack(repbody->oa.o_valid & OBD_MD_FLFLAGS ?
 835                                           repbody->oa.o_flags : 0);
 836                 repbody->oa.o_flags = cksum_type_pack(cksum_type);
 837                 repbody->oa.o_valid = OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
 838                 repbody->oa.o_cksum = ost_checksum_bulk(desc, OST_READ,cksum_type);
 839                 CDEBUG(D_PAGE, "checksum at read origin: %x\n",
 840                        repbody->oa.o_cksum);
 841         } else {
 842                 repbody->oa.o_valid = 0;
 843         }
 844         /* We're finishing using body->oa as an input variable */
 845
 846         /* Check if client was evicted while we were doing i/o before touching
 847            network */
 848         if (rc == 0) {
 849                 if (likely(!CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)))
 850                         rc = target_bulk_io(exp, desc, &lwi);
 851                 no_reply = rc != 0;
 852         }
 853
 854 out_commitrw:
 855         /* Must commit after prep above in all cases */
 856         rc = obd_commitrw(req->rq_svc_thread->t_env, OBD_BRW_READ, exp,
 857                           &repbody->oa, 1, ioo, remote_nb, npages, local_nb,
 858                           oti, rc);
 859
 860         if (rc == 0)
 861                 ost_drop_id(exp, &repbody->oa);
 862
 863 out_lock:
 864         ost_brw_lock_put(LCK_PR, ioo, remote_nb, &lockh);
 865 out_tls:
 866         ost_tls_put(req);
 867 out_bulk:
 868         if (desc && !CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))
 869                 ptlrpc_free_bulk_nopin(desc);
 870 out:
 871         LASSERT(rc <= 0);
 872         if (rc == 0) {
 873                 req->rq_status = nob;
 874                 ptlrpc_lprocfs_brw(req, nob);
 875                 target_committed_to_req(req);
 876                 ptlrpc_reply(req);
 877         } else if (!no_reply) {
 878                 /* Only reply if there was no comms problem with bulk */
 879                 target_committed_to_req(req);
 880                 req->rq_status = rc;
 881                 ptlrpc_error(req);
 882         } else {
 883                 /* reply out callback would free */
 884                 ptlrpc_req_drop_rs(req);
 885                 LCONSOLE_WARN("%s: Bulk IO read error with %s (at %s), "
 886                               "client will retry: rc %d\n",
 887                               exp->exp_obd->obd_name,
 888                               obd_uuid2str(&exp->exp_client_uuid),
 889                               obd_export_nid2str(exp), rc);
 890         }
 891         /* send a bulk after reply to simulate a network delay or reordering
 892          * by a router */
 893         if (unlikely(CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))) {
 894                 cfs_waitq_t              waitq;
 895                 struct l_wait_info       lwi1;
 896
 897                 CDEBUG(D_INFO, "reorder BULK\n");
 898                 cfs_waitq_init(&waitq);
 899
 900                 lwi1 = LWI_TIMEOUT_INTR(cfs_time_seconds(3), NULL, NULL, NULL);
 901                 l_wait_event(waitq, 0, &lwi1);
 902                 rc = target_bulk_io(exp, desc, &lwi);
 903                 ptlrpc_free_bulk_nopin(desc);
 904         }
 905
 906         RETURN(rc);
 907 }
 908
 909 static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
 910 {
 911         struct ptlrpc_bulk_desc *desc = NULL;
 912         struct obd_export       *exp = req->rq_export;
 913         struct niobuf_remote    *remote_nb;
 914         struct niobuf_local     *local_nb;
 915         struct obd_ioobj        *ioo;
 916         struct ost_body         *body, *repbody;
 917         struct l_wait_info       lwi;
 918         struct lustre_handle     lockh = {0};
 919         struct lustre_capa      *capa = NULL;
 920         __u32                   *rcs;
 921         int objcount, niocount, npages;
 922         int rc, i, j;
 923         obd_count                client_cksum = 0, server_cksum = 0;
 924         cksum_type_t             cksum_type = OBD_CKSUM_CRC32;
 925         int                      no_reply = 0, mmap = 0;
 926         __u32                    o_uid = 0, o_gid = 0;
 927         struct ost_thread_local_cache *tls;
 928         ENTRY;
 929
 930         req->rq_bulk_write = 1;
 931
 932         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
 933                 GOTO(out, rc = -EIO);
 934         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK2))
 935                 GOTO(out, rc = -EFAULT);
 936
 937         /* pause before transaction has been started */
 938         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, (obd_timeout + 1) / 4);
 939
 940         /* ost_body, ioobj & noibuf_remote are verified and swabbed in
 941          * ost_rw_hpreq_check(). */
 942         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 943         if (body == NULL)
 944                 GOTO(out, rc = -EFAULT);
 945
 946         objcount = req_capsule_get_size(&req->rq_pill, &RMF_OBD_IOOBJ,
 947                                         RCL_CLIENT) / sizeof(*ioo);
 948         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
 949         if (ioo == NULL)
 950                 GOTO(out, rc = -EFAULT);
 951
 952         rc = ost_validate_obdo(exp, &body->oa, ioo);
 953         if (rc)
 954                 RETURN(rc);
 955
 956         for (niocount = i = 0; i < objcount; i++)
 957                 niocount += ioo[i].ioo_bufcnt;
 958
 959         /*
 960          * It'd be nice to have a capsule function to indicate how many elements
 961          * there were in a buffer for an RMF that's declared to be an array.
 962          * It's easy enough to compute the number of elements here though.
 963          */
 964         remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
 965         if (remote_nb == NULL || niocount != (req_capsule_get_size(&req->rq_pill,
 966             &RMF_NIOBUF_REMOTE, RCL_CLIENT) / sizeof(*remote_nb)))
 967                 GOTO(out, rc = -EFAULT);
 968
 969         if ((remote_nb[0].flags & OBD_BRW_MEMALLOC) &&
 970             (exp->exp_connection->c_peer.nid == exp->exp_connection->c_self))
 971                 cfs_memory_pressure_set();
 972
 973         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
 974                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
 975                 if (capa == NULL) {
 976                         CERROR("Missing capability for OST BRW WRITE");
 977                         GOTO(out, rc = -EFAULT);
 978                 }
 979         }
 980
 981         req_capsule_set_size(&req->rq_pill, &RMF_RCS, RCL_SERVER,
 982                              niocount * sizeof(*rcs));
 983         rc = req_capsule_server_pack(&req->rq_pill);
 984         if (rc != 0)
 985                 GOTO(out, rc);
 986         CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_PACK, cfs_fail_val);
 987         rcs = req_capsule_server_get(&req->rq_pill, &RMF_RCS);
 988
 989         tls = ost_tls_get(req);
 990         if (tls == NULL)
 991                 GOTO(out_bulk, rc = -ENOMEM);
 992         local_nb = tls->local;
 993
 994         rc = ost_brw_lock_get(LCK_PW, exp, ioo, remote_nb, &lockh);
 995         if (rc != 0)
 996                 GOTO(out_tls, rc);
 997
 998         /*
 999          * If getting the lock took more time than
1000          * client was willing to wait, drop it. b=11330
1001          */
1002         if (cfs_time_current_sec() > req->rq_deadline ||
1003             OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
1004                 no_reply = 1;
1005                 CERROR("Dropping timed-out write from %s because locking "
1006                        "object "LPX64" took %ld seconds (limit was %ld).\n",
1007                        libcfs_id2str(req->rq_peer), ioo->ioo_id,
1008                        cfs_time_current_sec() - req->rq_arrival_time.tv_sec,
1009                        req->rq_deadline - req->rq_arrival_time.tv_sec);
1010                 GOTO(out_lock, rc = -ETIMEDOUT);
1011         }
1012
1013         /* obd_preprw clobbers oa->valid, so save what we need */
1014         if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1015                 client_cksum = body->oa.o_cksum;
1016                 if (body->oa.o_valid & OBD_MD_FLFLAGS)
1017                         cksum_type = cksum_type_unpack(body->oa.o_flags);
1018         }
1019         if (body->oa.o_valid & OBD_MD_FLFLAGS && body->oa.o_flags & OBD_FL_MMAP)
1020                 mmap = 1;
1021
1022         /* Because we already sync grant info with client when reconnect,
1023          * grant info will be cleared for resent req, then fed_grant and
1024          * total_grant will not be modified in following preprw_write */
1025         if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
1026                 DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
1027                 body->oa.o_valid &= ~OBD_MD_FLGRANT;
1028         }
1029
1030         if (exp_connect_rmtclient(exp)) {
1031                 o_uid = body->oa.o_uid;
1032                 o_gid = body->oa.o_gid;
1033         }
1034
1035         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1036         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
1037
1038         npages = OST_THREAD_POOL_SIZE;
1039         rc = obd_preprw(req->rq_svc_thread->t_env, OBD_BRW_WRITE, exp,
1040                         &repbody->oa, objcount, ioo, remote_nb, &npages,
1041                         local_nb, oti, capa);
1042         if (rc != 0)
1043                 GOTO(out_lock, rc);
1044
1045         desc = ptlrpc_prep_bulk_exp(req, npages,
1046                                      BULK_GET_SINK, OST_BULK_PORTAL);
1047         if (desc == NULL)
1048                 GOTO(skip_transfer, rc = -ENOMEM);
1049
1050         /* NB Having prepped, we must commit... */
1051
1052         for (i = 0; i < npages; i++)
1053                 ptlrpc_prep_bulk_page_nopin(desc, local_nb[i].page,
1054                                             local_nb[i].lnb_page_offset,
1055                                             local_nb[i].len);
1056
1057         rc = sptlrpc_svc_prep_bulk(req, desc);
1058         if (rc != 0)
1059                 GOTO(out_lock, rc);
1060
1061         rc = target_bulk_io(exp, desc, &lwi);
1062         no_reply = rc != 0;
1063
1064 skip_transfer:
1065         if (client_cksum != 0 && rc == 0) {
1066                 static int cksum_counter;
1067                 repbody->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1068                 repbody->oa.o_flags &= ~OBD_FL_CKSUM_ALL;
1069                 repbody->oa.o_flags |= cksum_type_pack(cksum_type);
1070                 server_cksum = ost_checksum_bulk(desc, OST_WRITE, cksum_type);
1071                 repbody->oa.o_cksum = server_cksum;
1072                 cksum_counter++;
1073                 if (unlikely(client_cksum != server_cksum)) {
1074                         CDEBUG_LIMIT(mmap ? D_INFO : D_ERROR,
1075                                      "client csum %x, server csum %x\n",
1076                                      client_cksum, server_cksum);
1077                         cksum_counter = 0;
1078                 } else if ((cksum_counter & (-cksum_counter)) == cksum_counter){
1079                         CDEBUG(D_INFO, "Checksum %u from %s OK: %x\n",
1080                                cksum_counter, libcfs_id2str(req->rq_peer),
1081                                server_cksum);
1082                 }
1083         }
1084
1085         /* Must commit after prep above in all cases */
1086         rc = obd_commitrw(req->rq_svc_thread->t_env, OBD_BRW_WRITE, exp,
1087                           &repbody->oa, objcount, ioo, remote_nb, npages,
1088                           local_nb, oti, rc);
1089         if (rc == -ENOTCONN)
1090                 /* quota acquire process has been given up because
1091                  * either the client has been evicted or the client
1092                  * has timed out the request already */
1093                 no_reply = 1;
1094
1095         if (exp_connect_rmtclient(exp)) {
1096                 repbody->oa.o_uid = o_uid;
1097                 repbody->oa.o_gid = o_gid;
1098         }
1099
1100         /*
1101          * Disable sending mtime back to the client. If the client locked the
1102          * whole object, then it has already updated the mtime on its side,
1103          * otherwise it will have to glimpse anyway (see bug 21489, comment 32)
1104          */
1105         repbody->oa.o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLATIME);
1106
1107         if (unlikely(client_cksum != server_cksum && rc == 0 && !mmap)) {
1108                 int  new_cksum = ost_checksum_bulk(desc, OST_WRITE, cksum_type);
1109                 char *msg;
1110                 char *via;
1111                 char *router;
1112
1113                 if (new_cksum == server_cksum)
1114                         msg = "changed in transit before arrival at OST";
1115                 else if (new_cksum == client_cksum)
1116                         msg = "initial checksum before message complete";
1117                 else
1118                         msg = "changed in transit AND after initial checksum";
1119
1120                 if (req->rq_peer.nid == desc->bd_sender) {
1121                         via = router = "";
1122                 } else {
1123                         via = " via ";
1124                         router = libcfs_nid2str(desc->bd_sender);
1125                 }
1126
1127                 LCONSOLE_ERROR_MSG(0x168, "%s: BAD WRITE CHECKSUM: %s from "
1128                                    "%s%s%s inode "DFID" object "
1129                                    LPU64"/"LPU64" extent ["LPU64"-"LPU64"]\n",
1130                                    exp->exp_obd->obd_name, msg,
1131                                    libcfs_id2str(req->rq_peer),
1132                                    via, router,
1133                                    body->oa.o_valid & OBD_MD_FLFID ?
1134                                                 body->oa.o_parent_seq : (__u64)0,
1135                                    body->oa.o_valid & OBD_MD_FLFID ?
1136                                                 body->oa.o_parent_oid : 0,
1137                                    body->oa.o_valid & OBD_MD_FLFID ?
1138                                                 body->oa.o_parent_ver : 0,
1139                                    body->oa.o_id,
1140                                    body->oa.o_valid & OBD_MD_FLGROUP ?
1141                                                 body->oa.o_seq : (__u64)0,
1142                                    local_nb[0].lnb_file_offset,
1143                                    local_nb[npages-1].lnb_file_offset +
1144                                    local_nb[npages-1].len - 1 );
1145                 CERROR("client csum %x, original server csum %x, "
1146                        "server csum now %x\n",
1147                        client_cksum, server_cksum, new_cksum);
1148         }
1149
1150         if (rc == 0) {
1151                 int nob = 0;
1152
1153                 /* set per-requested niobuf return codes */
1154                 for (i = j = 0; i < niocount; i++) {
1155                         int len = remote_nb[i].len;
1156
1157                         nob += len;
1158                         rcs[i] = 0;
1159                         do {
1160                                 LASSERT(j < npages);
1161                                 if (local_nb[j].rc < 0)
1162                                         rcs[i] = local_nb[j].rc;
1163                                 len -= local_nb[j].len;
1164                                 j++;
1165                         } while (len > 0);
1166                         LASSERT(len == 0);
1167                 }
1168                 LASSERT(j == npages);
1169                 ptlrpc_lprocfs_brw(req, nob);
1170         }
1171
1172 out_lock:
1173         ost_brw_lock_put(LCK_PW, ioo, remote_nb, &lockh);
1174 out_tls:
1175         ost_tls_put(req);
1176 out_bulk:
1177         if (desc)
1178                 ptlrpc_free_bulk_nopin(desc);
1179 out:
1180         if (rc == 0) {
1181                 oti_to_request(oti, req);
1182                 target_committed_to_req(req);
1183                 rc = ptlrpc_reply(req);
1184         } else if (!no_reply) {
1185                 /* Only reply if there was no comms problem with bulk */
1186                 target_committed_to_req(req);
1187                 req->rq_status = rc;
1188                 ptlrpc_error(req);
1189         } else {
1190                 /* reply out callback would free */
1191                 ptlrpc_req_drop_rs(req);
1192                 LCONSOLE_WARN("%s: Bulk IO write error with %s (at %s), "
1193                               "client will retry: rc %d\n",
1194                               exp->exp_obd->obd_name,
1195                               obd_uuid2str(&exp->exp_client_uuid),
1196                               obd_export_nid2str(exp), rc);
1197         }
1198         cfs_memory_pressure_clr();
1199         RETURN(rc);
1200 }
1201
1202 /**
1203  * Implementation of OST_SET_INFO.
1204  *
1205  * OST_SET_INFO is like ioctl(): heavily overloaded.  Specifically, it takes a
1206  * "key" and a value RPC buffers as arguments, with the value's contents
1207  * interpreted according to the key.
1208  *
1209  * Value types that need swabbing have swabbing done explicitly, either here or
1210  * in functions called from here.  This should be corrected: all swabbing should
1211  * be done in the capsule abstraction, as that will then allow us to move
1212  * swabbing exclusively to the client without having to modify server code
1213  * outside the capsule abstraction's implementation itself.  To correct this
1214  * will require minor changes to the capsule abstraction; see the comments for
1215  * req_capsule_extend() in layout.c.
1216  */
1217 static int ost_set_info(struct obd_export *exp, struct ptlrpc_request *req)
1218 {
1219         struct ost_body *body = NULL, *repbody;
1220         char *key, *val = NULL;
1221         int keylen, vallen, rc = 0;
1222         int is_grant_shrink = 0;
1223         ENTRY;
1224
1225         key = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1226         if (key == NULL) {
1227                 DEBUG_REQ(D_HA, req, "no set_info key");
1228                 RETURN(-EFAULT);
1229         }
1230         keylen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_KEY,
1231                                       RCL_CLIENT);
1232
1233         vallen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_VAL,
1234                                       RCL_CLIENT);
1235
1236         if ((is_grant_shrink = KEY_IS(KEY_GRANT_SHRINK)))
1237                 /* In this case the value is actually an RMF_OST_BODY, so we
1238                  * transmutate the type of this PTLRPC */
1239                 req_capsule_extend(&req->rq_pill, &RQF_OST_SET_GRANT_INFO);
1240
1241         rc = req_capsule_server_pack(&req->rq_pill);
1242         if (rc)
1243                 RETURN(rc);
1244
1245         if (vallen) {
1246                 if (is_grant_shrink) {
1247                         body = req_capsule_client_get(&req->rq_pill,
1248                                                       &RMF_OST_BODY);
1249                         if (!body)
1250                                 RETURN(-EFAULT);
1251
1252                         repbody = req_capsule_server_get(&req->rq_pill,
1253                                                          &RMF_OST_BODY);
1254                         memcpy(repbody, body, sizeof(*body));
1255                         val = (char*)repbody;
1256                 } else {
1257                         val = req_capsule_client_get(&req->rq_pill,
1258                                                      &RMF_SETINFO_VAL);
1259                 }
1260         }
1261
1262         if (KEY_IS(KEY_EVICT_BY_NID)) {
1263                 if (val && vallen)
1264                         obd_export_evict_by_nid(exp->exp_obd, val);
1265                 GOTO(out, rc = 0);
1266         } else if (KEY_IS(KEY_MDS_CONN) && ptlrpc_req_need_swab(req)) {
1267                 if (vallen < sizeof(__u32))
1268                         RETURN(-EFAULT);
1269                 __swab32s((__u32 *)val);
1270         }
1271
1272         /* OBD will also check if KEY_IS(KEY_GRANT_SHRINK), and will cast val to
1273          * a struct ost_body * value */
1274         rc = obd_set_info_async(req->rq_svc_thread->t_env, exp, keylen,
1275                                 key, vallen, val, NULL);
1276 out:
1277         lustre_msg_set_status(req->rq_repmsg, 0);
1278         RETURN(rc);
1279 }
1280
1281 static int ost_get_info(struct obd_export *exp, struct ptlrpc_request *req)
1282 {
1283         void *key, *reply;
1284         int keylen, replylen, rc = 0;
1285         struct req_capsule *pill = &req->rq_pill;
1286         ENTRY;
1287
1288         /* this common part for get_info rpc */
1289         key = req_capsule_client_get(pill, &RMF_SETINFO_KEY);
1290         if (key == NULL) {
1291                 DEBUG_REQ(D_HA, req, "no get_info key");
1292                 RETURN(-EFAULT);
1293         }
1294         keylen = req_capsule_get_size(pill, &RMF_SETINFO_KEY, RCL_CLIENT);
1295
1296         if (KEY_IS(KEY_FIEMAP)) {
1297                 struct ll_fiemap_info_key *fm_key = key;
1298                 int rc;
1299
1300                 rc = ost_validate_obdo(exp, &fm_key->oa, NULL);
1301                 if (rc)
1302                         RETURN(rc);
1303         }
1304
1305         rc = obd_get_info(req->rq_svc_thread->t_env, exp, keylen, key,
1306                           &replylen, NULL, NULL);
1307         if (rc)
1308                 RETURN(rc);
1309
1310         req_capsule_set_size(pill, &RMF_GENERIC_DATA,
1311                              RCL_SERVER, replylen);
1312
1313         rc = req_capsule_server_pack(pill);
1314         if (rc)
1315                 RETURN(rc);
1316
1317         reply = req_capsule_server_get(pill, &RMF_GENERIC_DATA);
1318         if (reply == NULL)
1319                 RETURN(-ENOMEM);
1320
1321         /* call again to fill in the reply buffer */
1322         rc = obd_get_info(req->rq_svc_thread->t_env, exp, keylen, key,
1323                           &replylen, reply, NULL);
1324
1325         lustre_msg_set_status(req->rq_repmsg, 0);
1326         RETURN(rc);
1327 }
1328
1329 static int ost_handle_quotactl(struct ptlrpc_request *req)
1330 {
1331         struct obd_quotactl *oqctl, *repoqc;
1332         int rc;
1333         ENTRY;
1334
1335         oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1336         if (oqctl == NULL)
1337                 GOTO(out, rc = -EPROTO);
1338
1339         rc = req_capsule_server_pack(&req->rq_pill);
1340         if (rc)
1341                 GOTO(out, rc);
1342
1343         repoqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1344         req->rq_status = obd_quotactl(req->rq_export, oqctl);
1345         *repoqc = *oqctl;
1346
1347 out:
1348         RETURN(rc);
1349 }
1350
1351 static int ost_handle_quotacheck(struct ptlrpc_request *req)
1352 {
1353         struct obd_quotactl *oqctl;
1354         int rc;
1355         ENTRY;
1356
1357         oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1358         if (oqctl == NULL)
1359                 RETURN(-EPROTO);
1360
1361         rc = req_capsule_server_pack(&req->rq_pill);
1362         if (rc)
1363                 RETURN(-ENOMEM);
1364
1365         /* deprecated, not used any more */
1366         req->rq_status = -EOPNOTSUPP;
1367         RETURN(-EOPNOTSUPP);
1368 }
1369
1370 static int ost_llog_handle_connect(struct obd_export *exp,
1371                                    struct ptlrpc_request *req)
1372 {
1373         struct llogd_conn_body *body;
1374         int rc;
1375         ENTRY;
1376
1377         body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_CONN_BODY);
1378         rc = obd_llog_connect(exp, body);
1379         RETURN(rc);
1380 }
1381
1382 #define ost_init_sec_none(reply, exp)                                   \
1383 do {                                                                    \
1384         reply->ocd_connect_flags &= ~(OBD_CONNECT_RMT_CLIENT |          \
1385                                       OBD_CONNECT_RMT_CLIENT_FORCE |    \
1386                                       OBD_CONNECT_OSS_CAPA);            \
1387         cfs_spin_lock(&exp->exp_lock);                                  \
1388         exp->exp_connect_flags = reply->ocd_connect_flags;              \
1389         cfs_spin_unlock(&exp->exp_lock);                                \
1390 } while (0)
1391
1392 static int ost_init_sec_level(struct ptlrpc_request *req)
1393 {
1394         struct obd_export *exp = req->rq_export;
1395         struct req_capsule *pill = &req->rq_pill;
1396         struct obd_device *obd = exp->exp_obd;
1397         struct filter_obd *filter = &obd->u.filter;
1398         char *client = libcfs_nid2str(req->rq_peer.nid);
1399         struct obd_connect_data *data, *reply;
1400         int rc = 0, remote;
1401         ENTRY;
1402
1403         data = req_capsule_client_get(pill, &RMF_CONNECT_DATA);
1404         reply = req_capsule_server_get(pill, &RMF_CONNECT_DATA);
1405         if (data == NULL || reply == NULL)
1406                 RETURN(-EFAULT);
1407
1408         /* connection from MDT is always trusted */
1409         if (req->rq_auth_usr_mdt) {
1410                 ost_init_sec_none(reply, exp);
1411                 RETURN(0);
1412         }
1413
1414         /* no GSS support case */
1415         if (!req->rq_auth_gss) {
1416                 if (filter->fo_sec_level > LUSTRE_SEC_NONE) {
1417                         CWARN("client %s -> target %s does not user GSS, "
1418                               "can not run under security level %d.\n",
1419                               client, obd->obd_name, filter->fo_sec_level);
1420                         RETURN(-EACCES);
1421                 } else {
1422                         ost_init_sec_none(reply, exp);
1423                         RETURN(0);
1424                 }
1425         }
1426
1427         /* old version case */
1428         if (unlikely(!(data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) ||
1429                      !(data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA))) {
1430                 if (filter->fo_sec_level > LUSTRE_SEC_NONE) {
1431                         CWARN("client %s -> target %s uses old version, "
1432                               "can not run under security level %d.\n",
1433                               client, obd->obd_name, filter->fo_sec_level);
1434                         RETURN(-EACCES);
1435                 } else {
1436                         CWARN("client %s -> target %s uses old version, "
1437                               "run under security level %d.\n",
1438                               client, obd->obd_name, filter->fo_sec_level);
1439                         ost_init_sec_none(reply, exp);
1440                         RETURN(0);
1441                 }
1442         }
1443
1444         remote = data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT_FORCE;
1445         if (remote) {
1446                 if (!req->rq_auth_remote)
1447                         CDEBUG(D_SEC, "client (local realm) %s -> target %s "
1448                                "asked to be remote.\n", client, obd->obd_name);
1449         } else if (req->rq_auth_remote) {
1450                 remote = 1;
1451                 CDEBUG(D_SEC, "client (remote realm) %s -> target %s is set "
1452                        "as remote by default.\n", client, obd->obd_name);
1453         }
1454
1455         if (remote) {
1456                 if (!filter->fo_fl_oss_capa) {
1457                         CDEBUG(D_SEC, "client %s -> target %s is set as remote,"
1458                                " but OSS capabilities are not enabled: %d.\n",
1459                                client, obd->obd_name, filter->fo_fl_oss_capa);
1460                         RETURN(-EACCES);
1461                 }
1462         }
1463
1464         switch (filter->fo_sec_level) {
1465         case LUSTRE_SEC_NONE:
1466                 if (!remote) {
1467                         ost_init_sec_none(reply, exp);
1468                         break;
1469                 } else {
1470                         CDEBUG(D_SEC, "client %s -> target %s is set as remote, "
1471                                "can not run under security level %d.\n",
1472                                client, obd->obd_name, filter->fo_sec_level);
1473                         RETURN(-EACCES);
1474                 }
1475         case LUSTRE_SEC_REMOTE:
1476                 if (!remote)
1477                         ost_init_sec_none(reply, exp);
1478                 break;
1479         case LUSTRE_SEC_ALL:
1480                 if (!remote) {
1481                         reply->ocd_connect_flags &= ~(OBD_CONNECT_RMT_CLIENT |
1482                                                       OBD_CONNECT_RMT_CLIENT_FORCE);
1483                         if (!filter->fo_fl_oss_capa)
1484                                 reply->ocd_connect_flags &= ~OBD_CONNECT_OSS_CAPA;
1485
1486                         cfs_spin_lock(&exp->exp_lock);
1487                         exp->exp_connect_flags = reply->ocd_connect_flags;
1488                         cfs_spin_unlock(&exp->exp_lock);
1489                 }
1490                 break;
1491         default:
1492                 RETURN(-EINVAL);
1493         }
1494
1495         RETURN(rc);
1496 }
1497
1498 /*
1499  * FIXME
1500  * this should be done in filter_connect()/filter_reconnect(), but
1501  * we can't obtain information like NID, which stored in incoming
1502  * request, thus can't decide what flavor to use. so we do it here.
1503  *
1504  * This hack should be removed after the OST stack be rewritten, just
1505  * like what we are doing in mdt_obd_connect()/mdt_obd_reconnect().
1506  */
1507 static int ost_connect_check_sptlrpc(struct ptlrpc_request *req)
1508 {
1509         struct obd_export     *exp = req->rq_export;
1510         struct filter_obd     *filter = &exp->exp_obd->u.filter;
1511         struct sptlrpc_flavor  flvr;
1512         int                    rc = 0;
1513
1514         if (unlikely(strcmp(exp->exp_obd->obd_type->typ_name,
1515                             LUSTRE_ECHO_NAME) == 0)) {
1516                 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
1517                 return 0;
1518         }
1519
1520         if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
1521                 cfs_read_lock(&filter->fo_sptlrpc_lock);
1522                 sptlrpc_target_choose_flavor(&filter->fo_sptlrpc_rset,
1523                                              req->rq_sp_from,
1524                                              req->rq_peer.nid,
1525                                              &flvr);
1526                 cfs_read_unlock(&filter->fo_sptlrpc_lock);
1527
1528                 cfs_spin_lock(&exp->exp_lock);
1529
1530                 exp->exp_sp_peer = req->rq_sp_from;
1531                 exp->exp_flvr = flvr;
1532
1533                 if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
1534                     exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
1535                         CERROR("unauthorized rpc flavor %x from %s, "
1536                                "expect %x\n", req->rq_flvr.sf_rpc,
1537                                libcfs_nid2str(req->rq_peer.nid),
1538                                exp->exp_flvr.sf_rpc);
1539                         rc = -EACCES;
1540                 }
1541
1542                 cfs_spin_unlock(&exp->exp_lock);
1543         } else {
1544                 if (exp->exp_sp_peer != req->rq_sp_from) {
1545                         CERROR("RPC source %s doesn't match %s\n",
1546                                sptlrpc_part2name(req->rq_sp_from),
1547                                sptlrpc_part2name(exp->exp_sp_peer));
1548                         rc = -EACCES;
1549                 } else {
1550                         rc = sptlrpc_target_export_check(exp, req);
1551                 }
1552         }
1553
1554         return rc;
1555 }
1556
1557 /* Ensure that data and metadata are synced to the disk when lock is cancelled
1558  * (if requested) */
1559 int ost_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
1560                      void *data, int flag)
1561 {
1562         struct lu_env   env;
1563         __u32           sync_lock_cancel = 0;
1564         __u32           len = sizeof(sync_lock_cancel);
1565         int             rc = 0;
1566
1567         ENTRY;
1568
1569         rc = lu_env_init(&env, LCT_DT_THREAD);
1570         if (unlikely(rc != 0))
1571                 RETURN(rc);
1572
1573         rc = obd_get_info(&env, lock->l_export, sizeof(KEY_SYNC_LOCK_CANCEL),
1574                           KEY_SYNC_LOCK_CANCEL, &len, &sync_lock_cancel, NULL);
1575         if (rc == 0 && flag == LDLM_CB_CANCELING &&
1576             (lock->l_granted_mode & (LCK_PW|LCK_GROUP)) &&
1577             (sync_lock_cancel == ALWAYS_SYNC_ON_CANCEL ||
1578              (sync_lock_cancel == BLOCKING_SYNC_ON_CANCEL &&
1579               lock->l_flags & LDLM_FL_CBPENDING))) {
1580                 struct obd_info *oinfo;
1581                 struct obdo     *oa;
1582                 int              rc;
1583
1584                 OBD_ALLOC_PTR(oinfo);
1585                 if (!oinfo)
1586                         GOTO(out_env, rc = -ENOMEM);
1587                 OBDO_ALLOC(oa);
1588                 if (!oa) {
1589                         OBD_FREE_PTR(oinfo);
1590                         GOTO(out_env, rc = -ENOMEM);
1591                 }
1592                 oa->o_id = lock->l_resource->lr_name.name[0];
1593                 oa->o_seq = lock->l_resource->lr_name.name[1];
1594                 oa->o_valid = OBD_MD_FLID|OBD_MD_FLGROUP;
1595                 oinfo->oi_oa = oa;
1596                 oinfo->oi_capa = BYPASS_CAPA;
1597
1598                 rc = obd_sync(&env, lock->l_export, oinfo,
1599                               lock->l_policy_data.l_extent.start,
1600                               lock->l_policy_data.l_extent.end, NULL);
1601                 if (rc)
1602                         CERROR("Error %d syncing data on lock cancel\n", rc);
1603
1604                 OBDO_FREE(oa);
1605                 OBD_FREE_PTR(oinfo);
1606         }
1607
1608         rc = ldlm_server_blocking_ast(lock, desc, data, flag);
1609 out_env:
1610         lu_env_fini(&env);
1611         RETURN(rc);
1612 }
1613
1614 static int ost_filter_recovery_request(struct ptlrpc_request *req,
1615                                        struct obd_device *obd, int *process)
1616 {
1617         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1618         case OST_CONNECT: /* This will never get here, but for completeness. */
1619         case OST_DISCONNECT:
1620                *process = 1;
1621                RETURN(0);
1622
1623         case OBD_PING:
1624         case OST_CREATE:
1625         case OST_DESTROY:
1626         case OST_PUNCH:
1627         case OST_SETATTR:
1628         case OST_SYNC:
1629         case OST_WRITE:
1630         case OBD_LOG_CANCEL:
1631         case LDLM_ENQUEUE:
1632                 *process = target_queue_recovery_request(req, obd);
1633                 RETURN(0);
1634
1635         default:
1636                 DEBUG_REQ(D_WARNING, req, "not permitted during recovery");
1637                 *process = -EAGAIN;
1638                 RETURN(0);
1639         }
1640 }
1641
1642 int ost_msg_check_version(struct lustre_msg *msg)
1643 {
1644         int rc;
1645
1646         switch(lustre_msg_get_opc(msg)) {
1647         case OST_CONNECT:
1648         case OST_DISCONNECT:
1649         case OBD_PING:
1650         case SEC_CTX_INIT:
1651         case SEC_CTX_INIT_CONT:
1652         case SEC_CTX_FINI:
1653                 rc = lustre_msg_check_version(msg, LUSTRE_OBD_VERSION);
1654                 if (rc)
1655                         CERROR("bad opc %u version %08x, expecting %08x\n",
1656                                lustre_msg_get_opc(msg),
1657                                lustre_msg_get_version(msg),
1658                                LUSTRE_OBD_VERSION);
1659                 break;
1660         case OST_CREATE:
1661         case OST_DESTROY:
1662         case OST_GETATTR:
1663         case OST_SETATTR:
1664         case OST_WRITE:
1665         case OST_READ:
1666         case OST_PUNCH:
1667         case OST_STATFS:
1668         case OST_SYNC:
1669         case OST_SET_INFO:
1670         case OST_GET_INFO:
1671         case OST_QUOTACHECK:
1672         case OST_QUOTACTL:
1673                 rc = lustre_msg_check_version(msg, LUSTRE_OST_VERSION);
1674                 if (rc)
1675                         CERROR("bad opc %u version %08x, expecting %08x\n",
1676                                lustre_msg_get_opc(msg),
1677                                lustre_msg_get_version(msg),
1678                                LUSTRE_OST_VERSION);
1679                 break;
1680         case LDLM_ENQUEUE:
1681         case LDLM_CONVERT:
1682         case LDLM_CANCEL:
1683         case LDLM_BL_CALLBACK:
1684         case LDLM_CP_CALLBACK:
1685                 rc = lustre_msg_check_version(msg, LUSTRE_DLM_VERSION);
1686                 if (rc)
1687                         CERROR("bad opc %u version %08x, expecting %08x\n",
1688                                lustre_msg_get_opc(msg),
1689                                lustre_msg_get_version(msg),
1690                                LUSTRE_DLM_VERSION);
1691                 break;
1692         case LLOG_ORIGIN_CONNECT:
1693         case OBD_LOG_CANCEL:
1694                 rc = lustre_msg_check_version(msg, LUSTRE_LOG_VERSION);
1695                 if (rc)
1696                         CERROR("bad opc %u version %08x, expecting %08x\n",
1697                                lustre_msg_get_opc(msg),
1698                                lustre_msg_get_version(msg),
1699                                LUSTRE_LOG_VERSION);
1700                 break;
1701         case OST_QUOTA_ADJUST_QUNIT:
1702                 rc = -ENOTSUPP;
1703                 CERROR("Quota adjust is deprecated as of 2.4.0\n");
1704                 break;
1705         default:
1706                 CERROR("Unexpected opcode %d\n", lustre_msg_get_opc(msg));
1707                 rc = -ENOTSUPP;
1708         }
1709         return rc;
1710 }
1711
1712 struct ost_prolong_data {
1713         struct ptlrpc_request *opd_req;
1714         struct obd_export     *opd_exp;
1715         struct obdo           *opd_oa;
1716         struct ldlm_res_id     opd_resid;
1717         struct ldlm_extent     opd_extent;
1718         ldlm_mode_t            opd_mode;
1719         unsigned int           opd_locks;
1720         int                    opd_timeout;
1721 };
1722
1723 /* prolong locks for the current service time of the corresponding
1724  * portal (= OST_IO_PORTAL)
1725  */
1726 static inline int prolong_timeout(struct ptlrpc_request *req)
1727 {
1728         struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt;
1729
1730         if (AT_OFF)
1731                 return obd_timeout / 2;
1732
1733         return max(at_est2timeout(at_get(&svcpt->scp_at_estimate)),
1734                    ldlm_timeout);
1735 }
1736
1737 static void ost_prolong_lock_one(struct ost_prolong_data *opd,
1738                                  struct ldlm_lock *lock)
1739 {
1740         LASSERT(lock->l_export == opd->opd_exp);
1741
1742         if (lock->l_destroyed) /* lock already cancelled */
1743                 return;
1744
1745         /* XXX: never try to grab resource lock here because we're inside
1746          * exp_bl_list_lock; in ldlm_lockd.c to handle waiting list we take
1747          * res lock and then exp_bl_list_lock. */
1748
1749         if (!(lock->l_flags & LDLM_FL_AST_SENT))
1750                 /* ignore locks not being cancelled */
1751                 return;
1752
1753         LDLM_DEBUG(lock,
1754                    "refreshed for req x"LPU64" ext("LPU64"->"LPU64") to %ds.\n",
1755                    opd->opd_req->rq_xid, opd->opd_extent.start,
1756                    opd->opd_extent.end, opd->opd_timeout);
1757
1758         /* OK. this is a possible lock the user holds doing I/O
1759          * let's refresh eviction timer for it */
1760         ldlm_refresh_waiting_lock(lock, opd->opd_timeout);
1761         ++opd->opd_locks;
1762 }
1763
1764 static void ost_prolong_locks(struct ost_prolong_data *data)
1765 {
1766         struct obd_export *exp = data->opd_exp;
1767         struct obdo       *oa  = data->opd_oa;
1768         struct ldlm_lock  *lock;
1769         ENTRY;
1770
1771         if (oa->o_valid & OBD_MD_FLHANDLE) {
1772                 /* mostly a request should be covered by only one lock, try
1773                  * fast path. */
1774                 lock = ldlm_handle2lock(&oa->o_handle);
1775                 if (lock != NULL) {
1776                         /* Fast path to check if the lock covers the whole IO
1777                          * region exclusively. */
1778                         if (lock->l_granted_mode == LCK_PW &&
1779                             ldlm_extent_contain(&lock->l_policy_data.l_extent,
1780                                                 &data->opd_extent)) {
1781                                 /* bingo */
1782                                 ost_prolong_lock_one(data, lock);
1783                                 LDLM_LOCK_PUT(lock);
1784                                 RETURN_EXIT;
1785                         }
1786                         LDLM_LOCK_PUT(lock);
1787                 }
1788         }
1789
1790
1791         cfs_spin_lock_bh(&exp->exp_bl_list_lock);
1792         cfs_list_for_each_entry(lock, &exp->exp_bl_list, l_exp_list) {
1793                 LASSERT(lock->l_flags & LDLM_FL_AST_SENT);
1794                 LASSERT(lock->l_resource->lr_type == LDLM_EXTENT);
1795
1796                 if (!ldlm_res_eq(&data->opd_resid, &lock->l_resource->lr_name))
1797                         continue;
1798
1799                 if (!ldlm_extent_overlap(&lock->l_policy_data.l_extent,
1800                                          &data->opd_extent))
1801                         continue;
1802
1803                 ost_prolong_lock_one(data, lock);
1804         }
1805         cfs_spin_unlock_bh(&exp->exp_bl_list_lock);
1806
1807         EXIT;
1808 }
1809
1810 /**
1811  * Returns 1 if the given PTLRPC matches the given LDLM locks, or 0 if it does
1812  * not.
1813  */
1814 static int ost_rw_hpreq_lock_match(struct ptlrpc_request *req,
1815                                    struct ldlm_lock *lock)
1816 {
1817         struct niobuf_remote *nb;
1818         struct obd_ioobj *ioo;
1819         int mode, opc;
1820         struct ldlm_extent ext;
1821         ENTRY;
1822
1823         opc = lustre_msg_get_opc(req->rq_reqmsg);
1824         LASSERT(opc == OST_READ || opc == OST_WRITE);
1825
1826         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
1827         LASSERT(ioo != NULL);
1828
1829         nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
1830         LASSERT(nb != NULL);
1831
1832         ext.start = nb->offset;
1833         nb += ioo->ioo_bufcnt - 1;
1834         ext.end = nb->offset + nb->len - 1;
1835
1836         LASSERT(lock->l_resource != NULL);
1837         if (!osc_res_name_eq(ioo->ioo_id, ioo->ioo_seq,
1838                              &lock->l_resource->lr_name))
1839                 RETURN(0);
1840
1841         mode = LCK_PW;
1842         if (opc == OST_READ)
1843                 mode |= LCK_PR;
1844         if (!(lock->l_granted_mode & mode))
1845                 RETURN(0);
1846
1847         RETURN(ldlm_extent_overlap(&lock->l_policy_data.l_extent, &ext));
1848 }
1849
1850 /**
1851  * High-priority queue request check for whether the given PTLRPC request (\a
1852  * req) is blocking an LDLM lock cancel.
1853  *
1854  * Returns 1 if the given given PTLRPC request (\a req) is blocking an LDLM lock
1855  * cancel, 0 if it is not, and -EFAULT if the request is malformed.
1856  *
1857  * Only OST_READs, OST_WRITEs and OST_PUNCHes go on the h-p RPC queue.  This
1858  * function looks only at OST_READs and OST_WRITEs.
1859  */
1860 static int ost_rw_hpreq_check(struct ptlrpc_request *req)
1861 {
1862         struct obd_device *obd = req->rq_export->exp_obd;
1863         struct ost_body *body;
1864         struct obd_ioobj *ioo;
1865         struct niobuf_remote *nb;
1866         struct ost_prolong_data opd = { 0 };
1867         int mode, opc;
1868         ENTRY;
1869
1870         /*
1871          * Use LASSERT to do sanity check because malformed RPCs should have
1872          * been filtered out in ost_hpreq_handler().
1873          */
1874         opc = lustre_msg_get_opc(req->rq_reqmsg);
1875         LASSERT(opc == OST_READ || opc == OST_WRITE);
1876
1877         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
1878         LASSERT(body != NULL);
1879
1880         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
1881         LASSERT(ioo != NULL);
1882
1883         nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
1884         LASSERT(nb != NULL);
1885         LASSERT(!(nb->flags & OBD_BRW_SRVLOCK));
1886
1887         osc_build_res_name(ioo->ioo_id, ioo->ioo_seq, &opd.opd_resid);
1888
1889         opd.opd_req = req;
1890         mode = LCK_PW;
1891         if (opc == OST_READ)
1892                 mode |= LCK_PR;
1893         opd.opd_mode = mode;
1894         opd.opd_exp = req->rq_export;
1895         opd.opd_oa  = &body->oa;
1896         opd.opd_extent.start = nb->offset;
1897         nb += ioo->ioo_bufcnt - 1;
1898         opd.opd_extent.end = nb->offset + nb->len - 1;
1899         opd.opd_timeout = prolong_timeout(req);
1900
1901         DEBUG_REQ(D_RPCTRACE, req,
1902                "%s %s: refresh rw locks: " LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
1903                obd->obd_name, cfs_current()->comm,
1904                opd.opd_resid.name[0], opd.opd_resid.name[1],
1905                opd.opd_extent.start, opd.opd_extent.end);
1906
1907         ost_prolong_locks(&opd);
1908
1909         CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
1910                obd->obd_name, opd.opd_locks, req);
1911
1912         RETURN(opd.opd_locks);
1913 }
1914
1915 static void ost_rw_hpreq_fini(struct ptlrpc_request *req)
1916 {
1917         (void)ost_rw_hpreq_check(req);
1918 }
1919
1920 /**
1921  * Like ost_rw_hpreq_lock_match(), but for OST_PUNCH RPCs.
1922  */
1923 static int ost_punch_hpreq_lock_match(struct ptlrpc_request *req,
1924                                       struct ldlm_lock *lock)
1925 {
1926         struct ost_body *body;
1927         ENTRY;
1928
1929         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
1930         LASSERT(body != NULL);
1931
1932         if (body->oa.o_valid & OBD_MD_FLHANDLE &&
1933             body->oa.o_handle.cookie == lock->l_handle.h_cookie)
1934                 RETURN(1);
1935
1936         RETURN(0);
1937 }
1938
1939 /**
1940  * Like ost_rw_hpreq_check(), but for OST_PUNCH RPCs.
1941  */
1942 static int ost_punch_hpreq_check(struct ptlrpc_request *req)
1943 {
1944         struct obd_device *obd = req->rq_export->exp_obd;
1945         struct ost_body *body;
1946         struct obdo *oa;
1947         struct ost_prolong_data opd = { 0 };
1948         __u64 start, end;
1949         ENTRY;
1950
1951         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
1952         LASSERT(body != NULL);
1953
1954         oa = &body->oa;
1955         LASSERT(!(oa->o_valid & OBD_MD_FLFLAGS) ||
1956                 !(oa->o_flags & OBD_FL_SRVLOCK));
1957
1958         start = oa->o_size;
1959         end = start + oa->o_blocks;
1960
1961         opd.opd_req = req;
1962         opd.opd_mode = LCK_PW;
1963         opd.opd_exp = req->rq_export;
1964         opd.opd_oa  = oa;
1965         opd.opd_extent.start = start;
1966         opd.opd_extent.end   = end;
1967         if (oa->o_blocks == OBD_OBJECT_EOF)
1968                 opd.opd_extent.end = OBD_OBJECT_EOF;
1969         opd.opd_timeout = prolong_timeout(req);
1970
1971         osc_build_res_name(oa->o_id, oa->o_seq, &opd.opd_resid);
1972
1973         CDEBUG(D_DLMTRACE,
1974                "%s: refresh locks: "LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
1975                obd->obd_name,
1976                opd.opd_resid.name[0], opd.opd_resid.name[1],
1977                opd.opd_extent.start, opd.opd_extent.end);
1978
1979         ost_prolong_locks(&opd);
1980
1981         CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
1982                obd->obd_name, opd.opd_locks, req);
1983
1984         RETURN(opd.opd_locks > 0);
1985 }
1986
1987 static void ost_punch_hpreq_fini(struct ptlrpc_request *req)
1988 {
1989         (void)ost_punch_hpreq_check(req);
1990 }
1991
1992 struct ptlrpc_hpreq_ops ost_hpreq_rw = {
1993         .hpreq_lock_match = ost_rw_hpreq_lock_match,
1994         .hpreq_check      = ost_rw_hpreq_check,
1995         .hpreq_fini       = ost_rw_hpreq_fini
1996 };
1997
1998 struct ptlrpc_hpreq_ops ost_hpreq_punch = {
1999         .hpreq_lock_match = ost_punch_hpreq_lock_match,
2000         .hpreq_check      = ost_punch_hpreq_check,
2001         .hpreq_fini       = ost_punch_hpreq_fini
2002 };
2003
2004 /** Assign high priority operations to the request if needed. */
2005 static int ost_io_hpreq_handler(struct ptlrpc_request *req)
2006 {
2007         ENTRY;
2008         if (req->rq_export) {
2009                 int opc = lustre_msg_get_opc(req->rq_reqmsg);
2010                 struct ost_body *body;
2011
2012                 if (opc == OST_READ || opc == OST_WRITE) {
2013                         struct niobuf_remote *nb;
2014                         struct obd_ioobj *ioo;
2015                         int objcount, niocount;
2016                         int rc;
2017                         int i;
2018
2019                         /* RPCs on the H-P queue can be inspected before
2020                          * ost_handler() initializes their pills, so we
2021                          * initialize that here.  Capsule initialization is
2022                          * idempotent, as is setting the pill's format (provided
2023                          * it doesn't change).
2024                          */
2025                         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2026                         if (opc == OST_READ)
2027                                 req_capsule_set(&req->rq_pill,
2028                                                 &RQF_OST_BRW_READ);
2029                         else
2030                                 req_capsule_set(&req->rq_pill,
2031                                                 &RQF_OST_BRW_WRITE);
2032
2033                         body = req_capsule_client_get(&req->rq_pill,
2034                                                       &RMF_OST_BODY);
2035                         if (body == NULL) {
2036                                 CERROR("Missing/short ost_body\n");
2037                                 RETURN(-EFAULT);
2038                         }
2039
2040                         objcount = req_capsule_get_size(&req->rq_pill,
2041                                                         &RMF_OBD_IOOBJ,
2042                                                         RCL_CLIENT) /
2043                                                         sizeof(*ioo);
2044                         if (objcount == 0) {
2045                                 CERROR("Missing/short ioobj\n");
2046                                 RETURN(-EFAULT);
2047                         }
2048                         if (objcount > 1) {
2049                                 CERROR("too many ioobjs (%d)\n", objcount);
2050                                 RETURN(-EFAULT);
2051                         }
2052
2053                         ioo = req_capsule_client_get(&req->rq_pill,
2054                                                      &RMF_OBD_IOOBJ);
2055                         if (ioo == NULL) {
2056                                 CERROR("Missing/short ioobj\n");
2057                                 RETURN(-EFAULT);
2058                         }
2059
2060                         rc = ost_validate_obdo(req->rq_export, &body->oa, ioo);
2061                         if (rc) {
2062                                 CERROR("invalid object ids\n");
2063                                 RETURN(rc);
2064                         }
2065
2066                         for (niocount = i = 0; i < objcount; i++) {
2067                                 if (ioo[i].ioo_bufcnt == 0) {
2068                                         CERROR("ioo[%d] has zero bufcnt\n", i);
2069                                         RETURN(-EFAULT);
2070                                 }
2071                                 niocount += ioo[i].ioo_bufcnt;
2072                         }
2073                         if (niocount > PTLRPC_MAX_BRW_PAGES) {
2074                                 DEBUG_REQ(D_RPCTRACE, req,
2075                                           "bulk has too many pages (%d)",
2076                                           niocount);
2077                                 RETURN(-EFAULT);
2078                         }
2079
2080                         nb = req_capsule_client_get(&req->rq_pill,
2081                                                     &RMF_NIOBUF_REMOTE);
2082                         if (nb == NULL) {
2083                                 CERROR("Missing/short niobuf\n");
2084                                 RETURN(-EFAULT);
2085                         }
2086
2087                         if (niocount == 0 || !(nb[0].flags & OBD_BRW_SRVLOCK))
2088                                 req->rq_ops = &ost_hpreq_rw;
2089                 } else if (opc == OST_PUNCH) {
2090                         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2091                         req_capsule_set(&req->rq_pill, &RQF_OST_PUNCH);
2092
2093                         body = req_capsule_client_get(&req->rq_pill,
2094                                                       &RMF_OST_BODY);
2095                         if (body == NULL) {
2096                                 CERROR("Missing/short ost_body\n");
2097                                 RETURN(-EFAULT);
2098                         }
2099
2100                         if (!(body->oa.o_valid & OBD_MD_FLFLAGS) ||
2101                             !(body->oa.o_flags & OBD_FL_SRVLOCK))
2102                                 req->rq_ops = &ost_hpreq_punch;
2103                 }
2104         }
2105         RETURN(0);
2106 }
2107
2108 /* TODO: handle requests in a similar way as MDT: see mdt_handle_common() */
2109 int ost_handle(struct ptlrpc_request *req)
2110 {
2111         struct obd_trans_info trans_info = { 0, };
2112         struct obd_trans_info *oti = &trans_info;
2113         int should_process, fail = OBD_FAIL_OST_ALL_REPLY_NET, rc = 0;
2114         struct obd_device *obd = NULL;
2115         ENTRY;
2116
2117         /* OST module is kept between remounts, but the last reference
2118          * to specific module (say, osd or ofd) kills all related keys
2119          * from the environment. so we have to refill it until the root
2120          * cause is fixed properly */
2121         lu_env_refill(req->rq_svc_thread->t_env);
2122
2123         LASSERT(current->journal_info == NULL);
2124
2125         /* primordial rpcs don't affect server recovery */
2126         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2127         case SEC_CTX_INIT:
2128         case SEC_CTX_INIT_CONT:
2129         case SEC_CTX_FINI:
2130                 GOTO(out, rc = 0);
2131         }
2132
2133         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2134
2135         if (lustre_msg_get_opc(req->rq_reqmsg) != OST_CONNECT) {
2136                 if (!class_connected_export(req->rq_export)) {
2137                         CDEBUG(D_HA,"operation %d on unconnected OST from %s\n",
2138                                lustre_msg_get_opc(req->rq_reqmsg),
2139                                libcfs_id2str(req->rq_peer));
2140                         req->rq_status = -ENOTCONN;
2141                         GOTO(out, rc = -ENOTCONN);
2142                 }
2143
2144                 obd = req->rq_export->exp_obd;
2145
2146                 /* Check for aborted recovery. */
2147                 if (obd->obd_recovering) {
2148                         rc = ost_filter_recovery_request(req, obd,
2149                                                          &should_process);
2150                         if (rc || !should_process)
2151                                 RETURN(rc);
2152                         else if (should_process < 0) {
2153                                 req->rq_status = should_process;
2154                                 rc = ptlrpc_error(req);
2155                                 RETURN(rc);
2156                         }
2157                 }
2158         }
2159
2160         oti_init(oti, req);
2161
2162         rc = ost_msg_check_version(req->rq_reqmsg);
2163         if (rc)
2164                 RETURN(rc);
2165
2166         if (req && req->rq_reqmsg && req->rq_export &&
2167             (req->rq_export->exp_connect_flags & OBD_CONNECT_JOBSTATS))
2168                 oti->oti_jobid = lustre_msg_get_jobid(req->rq_reqmsg);
2169
2170         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2171         case OST_CONNECT: {
2172                 CDEBUG(D_INODE, "connect\n");
2173                 req_capsule_set(&req->rq_pill, &RQF_OST_CONNECT);
2174                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_CONNECT_NET))
2175                         RETURN(0);
2176                 rc = target_handle_connect(req);
2177                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_CONNECT_NET2))
2178                         RETURN(0);
2179                 if (!rc) {
2180                         rc = ost_init_sec_level(req);
2181                         if (!rc)
2182                                 rc = ost_connect_check_sptlrpc(req);
2183                 }
2184                 break;
2185         }
2186         case OST_DISCONNECT:
2187                 CDEBUG(D_INODE, "disconnect\n");
2188                 req_capsule_set(&req->rq_pill, &RQF_OST_DISCONNECT);
2189                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_DISCONNECT_NET))
2190                         RETURN(0);
2191                 rc = target_handle_disconnect(req);
2192                 break;
2193         case OST_CREATE:
2194                 CDEBUG(D_INODE, "create\n");
2195                 req_capsule_set(&req->rq_pill, &RQF_OST_CREATE);
2196                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_CREATE_NET))
2197                         RETURN(0);
2198                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
2199                         GOTO(out, rc = -EROFS);
2200                 rc = ost_create(req->rq_export, req, oti);
2201                 break;
2202         case OST_DESTROY:
2203                 CDEBUG(D_INODE, "destroy\n");
2204                 req_capsule_set(&req->rq_pill, &RQF_OST_DESTROY);
2205                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_DESTROY_NET))
2206                         RETURN(0);
2207                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
2208                         GOTO(out, rc = -EROFS);
2209                 rc = ost_destroy(req->rq_export, req, oti);
2210                 break;
2211         case OST_GETATTR:
2212                 CDEBUG(D_INODE, "getattr\n");
2213                 req_capsule_set(&req->rq_pill, &RQF_OST_GETATTR);
2214                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_GETATTR_NET))
2215                         RETURN(0);
2216                 rc = ost_getattr(req->rq_export, req);
2217                 break;
2218         case OST_SETATTR:
2219                 CDEBUG(D_INODE, "setattr\n");
2220                 req_capsule_set(&req->rq_pill, &RQF_OST_SETATTR);
2221                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_SETATTR_NET))
2222                         RETURN(0);
2223                 rc = ost_setattr(req->rq_export, req, oti);
2224                 break;
2225         case OST_WRITE:
2226                 req_capsule_set(&req->rq_pill, &RQF_OST_BRW_WRITE);
2227                 CDEBUG(D_INODE, "write\n");
2228                 /* req->rq_request_portal would be nice, if it was set */
2229                 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL) {
2230                         CERROR("%s: deny write request from %s to portal %u\n",
2231                                req->rq_export->exp_obd->obd_name,
2232                                obd_export_nid2str(req->rq_export),
2233                                ptlrpc_req2svc(req)->srv_req_portal);
2234                         GOTO(out, rc = -EPROTO);
2235                 }
2236                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_NET))
2237                         RETURN(0);
2238                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOSPC))
2239                         GOTO(out, rc = -ENOSPC);
2240                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
2241                         GOTO(out, rc = -EROFS);
2242                 rc = ost_brw_write(req, oti);
2243                 LASSERT(current->journal_info == NULL);
2244                 /* ost_brw_write sends its own replies */
2245                 RETURN(rc);
2246         case OST_READ:
2247                 req_capsule_set(&req->rq_pill, &RQF_OST_BRW_READ);
2248                 CDEBUG(D_INODE, "read\n");
2249                 /* req->rq_request_portal would be nice, if it was set */
2250                 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL) {
2251                         CERROR("%s: deny read request from %s to portal %u\n",
2252                                req->rq_export->exp_obd->obd_name,
2253                                obd_export_nid2str(req->rq_export),
2254                                ptlrpc_req2svc(req)->srv_req_portal);
2255                         GOTO(out, rc = -EPROTO);
2256                 }
2257                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_NET))
2258                         RETURN(0);
2259                 rc = ost_brw_read(req, oti);
2260                 LASSERT(current->journal_info == NULL);
2261                 /* ost_brw_read sends its own replies */
2262                 RETURN(rc);
2263         case OST_PUNCH:
2264                 CDEBUG(D_INODE, "punch\n");
2265                 req_capsule_set(&req->rq_pill, &RQF_OST_PUNCH);
2266                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_PUNCH_NET))
2267                         RETURN(0);
2268                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
2269                         GOTO(out, rc = -EROFS);
2270                 rc = ost_punch(req->rq_export, req, oti);
2271                 break;
2272         case OST_STATFS:
2273                 CDEBUG(D_INODE, "statfs\n");
2274                 req_capsule_set(&req->rq_pill, &RQF_OST_STATFS);
2275                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_STATFS_NET))
2276                         RETURN(0);
2277                 rc = ost_statfs(req);
2278                 break;
2279         case OST_SYNC:
2280                 CDEBUG(D_INODE, "sync\n");
2281                 req_capsule_set(&req->rq_pill, &RQF_OST_SYNC);
2282                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_SYNC_NET))
2283                         RETURN(0);
2284                 rc = ost_sync(req->rq_export, req, oti);
2285                 break;
2286         case OST_SET_INFO:
2287                 DEBUG_REQ(D_INODE, req, "set_info");
2288                 req_capsule_set(&req->rq_pill, &RQF_OBD_SET_INFO);
2289                 rc = ost_set_info(req->rq_export, req);
2290                 break;
2291         case OST_GET_INFO:
2292                 DEBUG_REQ(D_INODE, req, "get_info");
2293                 req_capsule_set(&req->rq_pill, &RQF_OST_GET_INFO_GENERIC);
2294                 rc = ost_get_info(req->rq_export, req);
2295                 break;
2296         case OST_QUOTACHECK:
2297                 CDEBUG(D_INODE, "quotacheck\n");
2298                 req_capsule_set(&req->rq_pill, &RQF_OST_QUOTACHECK);
2299                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_QUOTACHECK_NET))
2300                         RETURN(0);
2301                 rc = ost_handle_quotacheck(req);
2302                 break;
2303         case OST_QUOTACTL:
2304                 CDEBUG(D_INODE, "quotactl\n");
2305                 req_capsule_set(&req->rq_pill, &RQF_OST_QUOTACTL);
2306                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_QUOTACTL_NET))
2307                         RETURN(0);
2308                 rc = ost_handle_quotactl(req);
2309                 break;
2310         case OBD_PING:
2311                 DEBUG_REQ(D_INODE, req, "ping");
2312                 req_capsule_set(&req->rq_pill, &RQF_OBD_PING);
2313                 rc = target_handle_ping(req);
2314                 break;
2315         /* FIXME - just reply status */
2316         case LLOG_ORIGIN_CONNECT:
2317                 DEBUG_REQ(D_INODE, req, "log connect");
2318                 req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_CONNECT);
2319                 rc = ost_llog_handle_connect(req->rq_export, req);
2320                 req->rq_status = rc;
2321                 rc = req_capsule_server_pack(&req->rq_pill);
2322                 if (rc)
2323                         RETURN(rc);
2324                 RETURN(ptlrpc_reply(req));
2325         case OBD_LOG_CANCEL:
2326                 CDEBUG(D_INODE, "log cancel\n");
2327                 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
2328                 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
2329                         RETURN(0);
2330                 rc = llog_origin_handle_cancel(req);
2331                 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
2332                         RETURN(0);
2333                 req->rq_status = rc;
2334                 rc = req_capsule_server_pack(&req->rq_pill);
2335                 if (rc)
2336                         RETURN(rc);
2337                 RETURN(ptlrpc_reply(req));
2338         case LDLM_ENQUEUE:
2339                 CDEBUG(D_INODE, "enqueue\n");
2340                 req_capsule_set(&req->rq_pill, &RQF_LDLM_ENQUEUE);
2341                 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_NET))
2342                         RETURN(0);
2343                 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
2344                                          ost_blocking_ast,
2345                                          ldlm_server_glimpse_ast);
2346                 fail = OBD_FAIL_OST_LDLM_REPLY_NET;
2347                 break;
2348         case LDLM_CONVERT:
2349                 CDEBUG(D_INODE, "convert\n");
2350                 req_capsule_set(&req->rq_pill, &RQF_LDLM_CONVERT);
2351                 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CONVERT_NET))
2352                         RETURN(0);
2353                 rc = ldlm_handle_convert(req);
2354                 break;
2355         case LDLM_CANCEL:
2356                 CDEBUG(D_INODE, "cancel\n");
2357                 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
2358                 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_NET))
2359                         RETURN(0);
2360                 rc = ldlm_handle_cancel(req);
2361                 break;
2362         case LDLM_BL_CALLBACK:
2363         case LDLM_CP_CALLBACK:
2364                 CDEBUG(D_INODE, "callback\n");
2365                 CERROR("callbacks should not happen on OST\n");
2366                 /* fall through */
2367         default:
2368                 CERROR("Unexpected opcode %d\n",
2369                        lustre_msg_get_opc(req->rq_reqmsg));
2370                 req->rq_status = -ENOTSUPP;
2371                 rc = ptlrpc_error(req);
2372                 RETURN(rc);
2373         }
2374
2375         LASSERT(current->journal_info == NULL);
2376
2377         EXIT;
2378         /* If we're DISCONNECTing, the export_data is already freed */
2379         if (!rc && lustre_msg_get_opc(req->rq_reqmsg) != OST_DISCONNECT)
2380                 target_committed_to_req(req);
2381
2382 out:
2383         if (!rc)
2384                 oti_to_request(oti, req);
2385
2386         target_send_reply(req, rc, fail);
2387         return 0;
2388 }
2389 EXPORT_SYMBOL(ost_handle);
2390
2391 /*
2392  * free per-thread pool created by ost_io_thread_init().
2393  */
2394 static void ost_io_thread_done(struct ptlrpc_thread *thread)
2395 {
2396         struct ost_thread_local_cache *tls; /* TLS stands for Thread-Local
2397                                              * Storage */
2398
2399         ENTRY;
2400
2401         LASSERT(thread != NULL);
2402
2403         /*
2404          * be prepared to handle partially-initialized pools (because this is
2405          * called from ost_io_thread_init() for cleanup.
2406          */
2407         tls = thread->t_data;
2408         if (tls != NULL) {
2409                 OBD_FREE_PTR(tls);
2410                 thread->t_data = NULL;
2411         }
2412         EXIT;
2413 }
2414
2415 /*
2416  * initialize per-thread page pool (bug 5137).
2417  */
2418 static int ost_io_thread_init(struct ptlrpc_thread *thread)
2419 {
2420         struct ost_thread_local_cache *tls;
2421
2422         ENTRY;
2423
2424         LASSERT(thread != NULL);
2425         LASSERT(thread->t_data == NULL);
2426
2427         OBD_ALLOC_PTR(tls);
2428         if (tls == NULL)
2429                 RETURN(-ENOMEM);
2430         thread->t_data = tls;
2431         RETURN(0);
2432 }
2433
2434 #define OST_WATCHDOG_TIMEOUT (obd_timeout * 1000)
2435
2436 static struct cfs_cpt_table     *ost_io_cptable;
2437
2438 /* Sigh - really, this is an OSS, the _server_, not the _target_ */
2439 static int ost_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
2440 {
2441         static struct ptlrpc_service_conf       svc_conf;
2442         struct ost_obd *ost = &obd->u.ost;
2443         struct lprocfs_static_vars lvars;
2444         nodemask_t              *mask;
2445         int rc;
2446         ENTRY;
2447
2448         rc = cfs_cleanup_group_info();
2449         if (rc)
2450                 RETURN(rc);
2451
2452         lprocfs_ost_init_vars(&lvars);
2453         lprocfs_obd_setup(obd, lvars.obd_vars);
2454
2455         cfs_mutex_init(&ost->ost_health_mutex);
2456
2457         svc_conf = (typeof(svc_conf)) {
2458                 .psc_name               = LUSTRE_OSS_NAME,
2459                 .psc_watchdog_factor    = OSS_SERVICE_WATCHDOG_FACTOR,
2460                 .psc_buf                = {
2461                         .bc_nbufs               = OST_NBUFS,
2462                         .bc_buf_size            = OST_BUFSIZE,
2463                         .bc_req_max_size        = OST_MAXREQSIZE,
2464                         .bc_rep_max_size        = OST_MAXREPSIZE,
2465                         .bc_req_portal          = OST_REQUEST_PORTAL,
2466                         .bc_rep_portal          = OSC_REPLY_PORTAL,
2467                 },
2468                 .psc_thr                = {
2469                         .tc_thr_name            = "ll_ost",
2470                         .tc_thr_factor          = OSS_THR_FACTOR,
2471                         .tc_nthrs_init          = OSS_NTHRS_INIT,
2472                         .tc_nthrs_base          = OSS_NTHRS_BASE,
2473                         .tc_nthrs_max           = OSS_NTHRS_MAX,
2474                         .tc_nthrs_user          = oss_num_threads,
2475                         .tc_cpu_affinity        = 1,
2476                         .tc_ctx_tags            = LCT_DT_THREAD,
2477                 },
2478                 .psc_cpt                = {
2479                         .cc_pattern             = oss_cpts,
2480                 },
2481                 .psc_ops                = {
2482                         .so_req_handler         = ost_handle,
2483                         .so_req_printer         = target_print_req,
2484                         .so_hpreq_handler       = ptlrpc_hpreq_handler,
2485                 },
2486         };
2487         ost->ost_service = ptlrpc_register_service(&svc_conf,
2488                                                    obd->obd_proc_entry);
2489         if (IS_ERR(ost->ost_service)) {
2490                 rc = PTR_ERR(ost->ost_service);
2491                 CERROR("failed to start service: %d\n", rc);
2492                 GOTO(out_lprocfs, rc);
2493         }
2494
2495         memset(&svc_conf, 0, sizeof(svc_conf));
2496         svc_conf = (typeof(svc_conf)) {
2497                 .psc_name               = "ost_create",
2498                 .psc_watchdog_factor    = OSS_SERVICE_WATCHDOG_FACTOR,
2499                 .psc_buf                = {
2500                         .bc_nbufs               = OST_NBUFS,
2501                         .bc_buf_size            = OST_BUFSIZE,
2502                         .bc_req_max_size        = OST_MAXREQSIZE,
2503                         .bc_rep_max_size        = OST_MAXREPSIZE,
2504                         .bc_req_portal          = OST_CREATE_PORTAL,
2505                         .bc_rep_portal          = OSC_REPLY_PORTAL,
2506                 },
2507                 .psc_thr                = {
2508                         .tc_thr_name            = "ll_ost_create",
2509                         .tc_thr_factor          = OSS_CR_THR_FACTOR,
2510                         .tc_nthrs_init          = OSS_CR_NTHRS_INIT,
2511                         .tc_nthrs_base          = OSS_CR_NTHRS_BASE,
2512                         .tc_nthrs_max           = OSS_CR_NTHRS_MAX,
2513                         .tc_nthrs_user          = oss_num_create_threads,
2514                         .tc_cpu_affinity        = 1,
2515                         .tc_ctx_tags            = LCT_DT_THREAD,
2516                 },
2517                 .psc_cpt                = {
2518                         .cc_pattern             = oss_cpts,
2519                 },
2520                 .psc_ops                = {
2521                         .so_req_handler         = ost_handle,
2522                         .so_req_printer         = target_print_req,
2523                 },
2524         };
2525         ost->ost_create_service = ptlrpc_register_service(&svc_conf,
2526                                                           obd->obd_proc_entry);
2527         if (IS_ERR(ost->ost_create_service)) {
2528                 rc = PTR_ERR(ost->ost_create_service);
2529                 CERROR("failed to start OST create service: %d\n", rc);
2530                 GOTO(out_service, rc);
2531         }
2532
2533         mask = cfs_cpt_table->ctb_nodemask;
2534         /* event CPT feature is disabled in libcfs level by set partition
2535          * number to 1, we still want to set node affinity for io service */
2536         if (cfs_cpt_number(cfs_cpt_table) == 1 && nodes_weight(*mask) > 1) {
2537                 int     cpt = 0;
2538                 int     i;
2539
2540                 ost_io_cptable = cfs_cpt_table_alloc(nodes_weight(*mask));
2541                 for_each_node_mask(i, *mask) {
2542                         if (ost_io_cptable == NULL) {
2543                                 CWARN("OSS failed to create CPT table\n");
2544                                 break;
2545                         }
2546
2547                         rc = cfs_cpt_set_node(ost_io_cptable, cpt++, i);
2548                         if (!rc) {
2549                                 CWARN("OSS Failed to set node %d for"
2550                                       "IO CPT table\n", i);
2551                                 cfs_cpt_table_free(ost_io_cptable);
2552                                 ost_io_cptable = NULL;
2553                                 break;
2554                         }
2555                 }
2556         }
2557
2558         memset(&svc_conf, 0, sizeof(svc_conf));
2559         svc_conf = (typeof(svc_conf)) {
2560                 .psc_name               = "ost_io",
2561                 .psc_watchdog_factor    = OSS_SERVICE_WATCHDOG_FACTOR,
2562                 .psc_buf                = {
2563                         .bc_nbufs               = OST_NBUFS,
2564                         .bc_buf_size            = OST_BUFSIZE,
2565                         .bc_req_max_size        = OST_MAXREQSIZE,
2566                         .bc_rep_max_size        = OST_MAXREPSIZE,
2567                         .bc_req_portal          = OST_IO_PORTAL,
2568                         .bc_rep_portal          = OSC_REPLY_PORTAL,
2569                 },
2570                 .psc_thr                = {
2571                         .tc_thr_name            = "ll_ost_io",
2572                         .tc_thr_factor          = OSS_THR_FACTOR,
2573                         .tc_nthrs_init          = OSS_NTHRS_INIT,
2574                         .tc_nthrs_base          = OSS_NTHRS_BASE,
2575                         .tc_nthrs_max           = OSS_NTHRS_MAX,
2576                         .tc_nthrs_user          = oss_num_threads,
2577                         .tc_cpu_affinity        = 1,
2578                         .tc_ctx_tags            = LCT_DT_THREAD,
2579                 },
2580                 .psc_cpt                = {
2581                         .cc_cptable             = ost_io_cptable,
2582                         .cc_pattern             = ost_io_cptable == NULL ?
2583                                                   oss_io_cpts : NULL,
2584                 },
2585                 .psc_ops                = {
2586                         .so_thr_init            = ost_io_thread_init,
2587                         .so_thr_done            = ost_io_thread_done,
2588                         .so_req_handler         = ost_handle,
2589                         .so_hpreq_handler       = ost_io_hpreq_handler,
2590                         .so_req_printer         = target_print_req,
2591                 },
2592         };
2593         ost->ost_io_service = ptlrpc_register_service(&svc_conf,
2594                                                       obd->obd_proc_entry);
2595         if (IS_ERR(ost->ost_io_service)) {
2596                 rc = PTR_ERR(ost->ost_io_service);
2597                 CERROR("failed to start OST I/O service: %d\n", rc);
2598                 ost->ost_io_service = NULL;
2599                 GOTO(out_create, rc);
2600         }
2601
2602         ping_evictor_start();
2603
2604         RETURN(0);
2605
2606 out_create:
2607         ptlrpc_unregister_service(ost->ost_create_service);
2608         ost->ost_create_service = NULL;
2609 out_service:
2610         ptlrpc_unregister_service(ost->ost_service);
2611         ost->ost_service = NULL;
2612 out_lprocfs:
2613         lprocfs_obd_cleanup(obd);
2614         RETURN(rc);
2615 }
2616
2617 static int ost_cleanup(struct obd_device *obd)
2618 {
2619         struct ost_obd *ost = &obd->u.ost;
2620         int err = 0;
2621         ENTRY;
2622
2623         ping_evictor_stop();
2624
2625         /* there is no recovery for OST OBD, all recovery is controlled by
2626          * obdfilter OBD */
2627         LASSERT(obd->obd_recovering == 0);
2628         cfs_mutex_lock(&ost->ost_health_mutex);
2629         ptlrpc_unregister_service(ost->ost_service);
2630         ptlrpc_unregister_service(ost->ost_create_service);
2631         ptlrpc_unregister_service(ost->ost_io_service);
2632         ost->ost_service = NULL;
2633         ost->ost_create_service = NULL;
2634         ost->ost_io_service = NULL;
2635
2636         cfs_mutex_unlock(&ost->ost_health_mutex);
2637
2638         lprocfs_obd_cleanup(obd);
2639
2640         if (ost_io_cptable != NULL) {
2641                 cfs_cpt_table_free(ost_io_cptable);
2642                 ost_io_cptable = NULL;
2643         }
2644
2645         RETURN(err);
2646 }
2647
2648 static int ost_health_check(const struct lu_env *env, struct obd_device *obd)
2649 {
2650         struct ost_obd *ost = &obd->u.ost;
2651         int rc = 0;
2652
2653         cfs_mutex_lock(&ost->ost_health_mutex);
2654         rc |= ptlrpc_service_health_check(ost->ost_service);
2655         rc |= ptlrpc_service_health_check(ost->ost_create_service);
2656         rc |= ptlrpc_service_health_check(ost->ost_io_service);
2657         cfs_mutex_unlock(&ost->ost_health_mutex);
2658
2659         /*
2660          * health_check to return 0 on healthy
2661          * and 1 on unhealthy.
2662          */
2663         if( rc != 0)
2664                 rc = 1;
2665
2666         return rc;
2667 }
2668
2669 struct ost_thread_local_cache *ost_tls(struct ptlrpc_request *r)
2670 {
2671         return (struct ost_thread_local_cache *)(r->rq_svc_thread->t_data);
2672 }
2673
2674 /* use obd ops to offer management infrastructure */
2675 static struct obd_ops ost_obd_ops = {
2676         .o_owner        = THIS_MODULE,
2677         .o_setup        = ost_setup,
2678         .o_cleanup      = ost_cleanup,
2679         .o_health_check = ost_health_check,
2680 };
2681
2682
2683 static int __init ost_init(void)
2684 {
2685         struct lprocfs_static_vars lvars;
2686         int rc;
2687         ENTRY;
2688
2689         ost_page_to_corrupt = cfs_alloc_page(CFS_ALLOC_STD);
2690
2691         lprocfs_ost_init_vars(&lvars);
2692         rc = class_register_type(&ost_obd_ops, NULL, lvars.module_vars,
2693                                  LUSTRE_OSS_NAME, NULL);
2694
2695         if (ost_num_threads != 0 && oss_num_threads == 0) {
2696                 LCONSOLE_INFO("ost_num_threads module parameter is deprecated, "
2697                               "use oss_num_threads instead or unset both for "
2698                               "dynamic thread startup\n");
2699                 oss_num_threads = ost_num_threads;
2700         }
2701
2702         RETURN(rc);
2703 }
2704
2705 static void /*__exit*/ ost_exit(void)
2706 {
2707         if (ost_page_to_corrupt)
2708                 page_cache_release(ost_page_to_corrupt);
2709
2710         class_unregister_type(LUSTRE_OSS_NAME);
2711 }
2712
2713 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2714 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
2715 MODULE_LICENSE("GPL");
2716
2717 module_init(ost_init);
2718 module_exit(ost_exit);