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 void ost_warn_on_cksum(struct ptlrpc_request *req,
 910                               struct ptlrpc_bulk_desc *desc,
 911                               struct niobuf_local *local_nb, int npages,
 912                               obd_count client_cksum, obd_count server_cksum,
 913                               int mmap)
 914 {
 915         struct obd_export *exp = req->rq_export;
 916         struct ost_body *body;
 917         char *router;
 918         char *via;
 919
 920         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 921         LASSERT (body != NULL);
 922
 923         if (req->rq_peer.nid == desc->bd_sender) {
 924                 via = router = "";
 925         } else {
 926                 via = " via ";
 927                 router = libcfs_nid2str(desc->bd_sender);
 928         }
 929
 930         if (mmap) {
 931                 CDEBUG_LIMIT(D_INFO, "client csum %x, server csum %x\n",
 932                              client_cksum, server_cksum);
 933                 return;
 934         }
 935
 936         LCONSOLE_ERROR_MSG(0x168, "BAD WRITE CHECKSUM: %s from %s%s%s inode "
 937                            DFID" object "LPU64"/"LPU64" extent ["LPU64"-"LPU64
 938                            "]: client csum %x, server csum %x\n",
 939                            exp->exp_obd->obd_name, libcfs_id2str(req->rq_peer),
 940                            via, router,
 941                            body->oa.o_valid & OBD_MD_FLFID ?
 942                            body->oa.o_parent_seq : (__u64)0,
 943                            body->oa.o_valid & OBD_MD_FLFID ?
 944                            body->oa.o_parent_oid : 0,
 945                            body->oa.o_valid & OBD_MD_FLFID ?
 946                            body->oa.o_parent_ver : 0,
 947                            body->oa.o_id,
 948                            body->oa.o_valid & OBD_MD_FLGROUP ?
 949                            body->oa.o_seq : (__u64)0,
 950                            local_nb[0].lnb_file_offset,
 951                            local_nb[npages-1].lnb_file_offset +
 952                            local_nb[npages-1].len - 1,
 953                            client_cksum, server_cksum);
 954 }
 955
 956 static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
 957 {
 958         struct ptlrpc_bulk_desc *desc = NULL;
 959         struct obd_export       *exp = req->rq_export;
 960         struct niobuf_remote    *remote_nb;
 961         struct niobuf_local     *local_nb;
 962         struct obd_ioobj        *ioo;
 963         struct ost_body         *body, *repbody;
 964         struct l_wait_info       lwi;
 965         struct lustre_handle     lockh = {0};
 966         struct lustre_capa      *capa = NULL;
 967         __u32                   *rcs;
 968         int objcount, niocount, npages;
 969         int rc, i, j;
 970         obd_count                client_cksum = 0, server_cksum = 0;
 971         cksum_type_t             cksum_type = OBD_CKSUM_CRC32;
 972         int                      no_reply = 0, mmap = 0;
 973         __u32                    o_uid = 0, o_gid = 0;
 974         struct ost_thread_local_cache *tls;
 975         ENTRY;
 976
 977         req->rq_bulk_write = 1;
 978
 979         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
 980                 GOTO(out, rc = -EIO);
 981         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK2))
 982                 GOTO(out, rc = -EFAULT);
 983
 984         /* pause before transaction has been started */
 985         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, (obd_timeout + 1) / 4);
 986
 987         /* ost_body, ioobj & noibuf_remote are verified and swabbed in
 988          * ost_rw_hpreq_check(). */
 989         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 990         if (body == NULL)
 991                 GOTO(out, rc = -EFAULT);
 992
 993         objcount = req_capsule_get_size(&req->rq_pill, &RMF_OBD_IOOBJ,
 994                                         RCL_CLIENT) / sizeof(*ioo);
 995         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
 996         if (ioo == NULL)
 997                 GOTO(out, rc = -EFAULT);
 998
 999         rc = ost_validate_obdo(exp, &body->oa, ioo);
1000         if (rc)
1001                 RETURN(rc);
1002
1003         for (niocount = i = 0; i < objcount; i++)
1004                 niocount += ioo[i].ioo_bufcnt;
1005
1006         /*
1007          * It'd be nice to have a capsule function to indicate how many elements
1008          * there were in a buffer for an RMF that's declared to be an array.
1009          * It's easy enough to compute the number of elements here though.
1010          */
1011         remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
1012         if (remote_nb == NULL || niocount != (req_capsule_get_size(&req->rq_pill,
1013             &RMF_NIOBUF_REMOTE, RCL_CLIENT) / sizeof(*remote_nb)))
1014                 GOTO(out, rc = -EFAULT);
1015
1016         if ((remote_nb[0].flags & OBD_BRW_MEMALLOC) &&
1017             (exp->exp_connection->c_peer.nid == exp->exp_connection->c_self))
1018                 cfs_memory_pressure_set();
1019
1020         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
1021                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
1022                 if (capa == NULL) {
1023                         CERROR("Missing capability for OST BRW WRITE");
1024                         GOTO(out, rc = -EFAULT);
1025                 }
1026         }
1027
1028         req_capsule_set_size(&req->rq_pill, &RMF_RCS, RCL_SERVER,
1029                              niocount * sizeof(*rcs));
1030         rc = req_capsule_server_pack(&req->rq_pill);
1031         if (rc != 0)
1032                 GOTO(out, rc);
1033         CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_PACK, cfs_fail_val);
1034         rcs = req_capsule_server_get(&req->rq_pill, &RMF_RCS);
1035
1036         tls = ost_tls_get(req);
1037         if (tls == NULL)
1038                 GOTO(out_bulk, rc = -ENOMEM);
1039         local_nb = tls->local;
1040
1041         rc = ost_brw_lock_get(LCK_PW, exp, ioo, remote_nb, &lockh);
1042         if (rc != 0)
1043                 GOTO(out_tls, rc);
1044
1045         /*
1046          * If getting the lock took more time than
1047          * client was willing to wait, drop it. b=11330
1048          */
1049         if (cfs_time_current_sec() > req->rq_deadline ||
1050             OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
1051                 no_reply = 1;
1052                 CERROR("Dropping timed-out write from %s because locking "
1053                        "object "LPX64" took %ld seconds (limit was %ld).\n",
1054                        libcfs_id2str(req->rq_peer), ioo->ioo_id,
1055                        cfs_time_current_sec() - req->rq_arrival_time.tv_sec,
1056                        req->rq_deadline - req->rq_arrival_time.tv_sec);
1057                 GOTO(out_lock, rc = -ETIMEDOUT);
1058         }
1059
1060         /* obd_preprw clobbers oa->valid, so save what we need */
1061         if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1062                 client_cksum = body->oa.o_cksum;
1063                 if (body->oa.o_valid & OBD_MD_FLFLAGS)
1064                         cksum_type = cksum_type_unpack(body->oa.o_flags);
1065         }
1066         if (body->oa.o_valid & OBD_MD_FLFLAGS && body->oa.o_flags & OBD_FL_MMAP)
1067                 mmap = 1;
1068
1069         /* Because we already sync grant info with client when reconnect,
1070          * grant info will be cleared for resent req, then fed_grant and
1071          * total_grant will not be modified in following preprw_write */
1072         if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
1073                 DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
1074                 body->oa.o_valid &= ~OBD_MD_FLGRANT;
1075         }
1076
1077         if (exp_connect_rmtclient(exp)) {
1078                 o_uid = body->oa.o_uid;
1079                 o_gid = body->oa.o_gid;
1080         }
1081
1082         repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1083         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
1084
1085         npages = OST_THREAD_POOL_SIZE;
1086         rc = obd_preprw(req->rq_svc_thread->t_env, OBD_BRW_WRITE, exp,
1087                         &repbody->oa, objcount, ioo, remote_nb, &npages,
1088                         local_nb, oti, capa);
1089         if (rc != 0)
1090                 GOTO(out_lock, rc);
1091
1092         desc = ptlrpc_prep_bulk_exp(req, npages,
1093                                      BULK_GET_SINK, OST_BULK_PORTAL);
1094         if (desc == NULL)
1095                 GOTO(skip_transfer, rc = -ENOMEM);
1096
1097         /* NB Having prepped, we must commit... */
1098
1099         for (i = 0; i < npages; i++)
1100                 ptlrpc_prep_bulk_page_nopin(desc, local_nb[i].page,
1101                                             local_nb[i].lnb_page_offset,
1102                                             local_nb[i].len);
1103
1104         rc = sptlrpc_svc_prep_bulk(req, desc);
1105         if (rc != 0)
1106                 GOTO(out_lock, rc);
1107
1108         rc = target_bulk_io(exp, desc, &lwi);
1109         no_reply = rc != 0;
1110
1111 skip_transfer:
1112         if (client_cksum != 0 && rc == 0) {
1113                 static int cksum_counter;
1114                 repbody->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1115                 repbody->oa.o_flags &= ~OBD_FL_CKSUM_ALL;
1116                 repbody->oa.o_flags |= cksum_type_pack(cksum_type);
1117                 server_cksum = ost_checksum_bulk(desc, OST_WRITE, cksum_type);
1118                 repbody->oa.o_cksum = server_cksum;
1119                 cksum_counter++;
1120                 if (unlikely(client_cksum != server_cksum)) {
1121                         ost_warn_on_cksum(req, desc, local_nb, npages,
1122                                           client_cksum, server_cksum, mmap);
1123                         cksum_counter = 0;
1124
1125                 } else if ((cksum_counter & (-cksum_counter)) == cksum_counter){
1126                         CDEBUG(D_INFO, "Checksum %u from %s OK: %x\n",
1127                                cksum_counter, libcfs_id2str(req->rq_peer),
1128                                server_cksum);
1129                 }
1130         }
1131
1132         /* Must commit after prep above in all cases */
1133         rc = obd_commitrw(req->rq_svc_thread->t_env, OBD_BRW_WRITE, exp,
1134                           &repbody->oa, objcount, ioo, remote_nb, npages,
1135                           local_nb, oti, rc);
1136         if (rc == -ENOTCONN)
1137                 /* quota acquire process has been given up because
1138                  * either the client has been evicted or the client
1139                  * has timed out the request already */
1140                 no_reply = 1;
1141
1142         if (exp_connect_rmtclient(exp)) {
1143                 repbody->oa.o_uid = o_uid;
1144                 repbody->oa.o_gid = o_gid;
1145         }
1146
1147         /*
1148          * Disable sending mtime back to the client. If the client locked the
1149          * whole object, then it has already updated the mtime on its side,
1150          * otherwise it will have to glimpse anyway (see bug 21489, comment 32)
1151          */
1152         repbody->oa.o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLATIME);
1153
1154         if (rc == 0) {
1155                 int nob = 0;
1156
1157                 /* set per-requested niobuf return codes */
1158                 for (i = j = 0; i < niocount; i++) {
1159                         int len = remote_nb[i].len;
1160
1161                         nob += len;
1162                         rcs[i] = 0;
1163                         do {
1164                                 LASSERT(j < npages);
1165                                 if (local_nb[j].rc < 0)
1166                                         rcs[i] = local_nb[j].rc;
1167                                 len -= local_nb[j].len;
1168                                 j++;
1169                         } while (len > 0);
1170                         LASSERT(len == 0);
1171                 }
1172                 LASSERT(j == npages);
1173                 ptlrpc_lprocfs_brw(req, nob);
1174         }
1175
1176 out_lock:
1177         ost_brw_lock_put(LCK_PW, ioo, remote_nb, &lockh);
1178 out_tls:
1179         ost_tls_put(req);
1180 out_bulk:
1181         if (desc)
1182                 ptlrpc_free_bulk_nopin(desc);
1183 out:
1184         if (rc == 0) {
1185                 oti_to_request(oti, req);
1186                 target_committed_to_req(req);
1187                 rc = ptlrpc_reply(req);
1188         } else if (!no_reply) {
1189                 /* Only reply if there was no comms problem with bulk */
1190                 target_committed_to_req(req);
1191                 req->rq_status = rc;
1192                 ptlrpc_error(req);
1193         } else {
1194                 /* reply out callback would free */
1195                 ptlrpc_req_drop_rs(req);
1196                 LCONSOLE_WARN("%s: Bulk IO write error with %s (at %s), "
1197                               "client will retry: rc %d\n",
1198                               exp->exp_obd->obd_name,
1199                               obd_uuid2str(&exp->exp_client_uuid),
1200                               obd_export_nid2str(exp), rc);
1201         }
1202         cfs_memory_pressure_clr();
1203         RETURN(rc);
1204 }
1205
1206 /**
1207  * Implementation of OST_SET_INFO.
1208  *
1209  * OST_SET_INFO is like ioctl(): heavily overloaded.  Specifically, it takes a
1210  * "key" and a value RPC buffers as arguments, with the value's contents
1211  * interpreted according to the key.
1212  *
1213  * Value types that need swabbing have swabbing done explicitly, either here or
1214  * in functions called from here.  This should be corrected: all swabbing should
1215  * be done in the capsule abstraction, as that will then allow us to move
1216  * swabbing exclusively to the client without having to modify server code
1217  * outside the capsule abstraction's implementation itself.  To correct this
1218  * will require minor changes to the capsule abstraction; see the comments for
1219  * req_capsule_extend() in layout.c.
1220  */
1221 static int ost_set_info(struct obd_export *exp, struct ptlrpc_request *req)
1222 {
1223         struct ost_body *body = NULL, *repbody;
1224         char *key, *val = NULL;
1225         int keylen, vallen, rc = 0;
1226         int is_grant_shrink = 0;
1227         ENTRY;
1228
1229         key = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1230         if (key == NULL) {
1231                 DEBUG_REQ(D_HA, req, "no set_info key");
1232                 RETURN(-EFAULT);
1233         }
1234         keylen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_KEY,
1235                                       RCL_CLIENT);
1236
1237         vallen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_VAL,
1238                                       RCL_CLIENT);
1239
1240         if ((is_grant_shrink = KEY_IS(KEY_GRANT_SHRINK)))
1241                 /* In this case the value is actually an RMF_OST_BODY, so we
1242                  * transmutate the type of this PTLRPC */
1243                 req_capsule_extend(&req->rq_pill, &RQF_OST_SET_GRANT_INFO);
1244
1245         rc = req_capsule_server_pack(&req->rq_pill);
1246         if (rc)
1247                 RETURN(rc);
1248
1249         if (vallen) {
1250                 if (is_grant_shrink) {
1251                         body = req_capsule_client_get(&req->rq_pill,
1252                                                       &RMF_OST_BODY);
1253                         if (!body)
1254                                 RETURN(-EFAULT);
1255
1256                         repbody = req_capsule_server_get(&req->rq_pill,
1257                                                          &RMF_OST_BODY);
1258                         memcpy(repbody, body, sizeof(*body));
1259                         val = (char*)repbody;
1260                 } else {
1261                         val = req_capsule_client_get(&req->rq_pill,
1262                                                      &RMF_SETINFO_VAL);
1263                 }
1264         }
1265
1266         if (KEY_IS(KEY_EVICT_BY_NID)) {
1267                 if (val && vallen)
1268                         obd_export_evict_by_nid(exp->exp_obd, val);
1269                 GOTO(out, rc = 0);
1270         } else if (KEY_IS(KEY_MDS_CONN) && ptlrpc_req_need_swab(req)) {
1271                 if (vallen < sizeof(__u32))
1272                         RETURN(-EFAULT);
1273                 __swab32s((__u32 *)val);
1274         }
1275
1276         /* OBD will also check if KEY_IS(KEY_GRANT_SHRINK), and will cast val to
1277          * a struct ost_body * value */
1278         rc = obd_set_info_async(req->rq_svc_thread->t_env, exp, keylen,
1279                                 key, vallen, val, NULL);
1280 out:
1281         lustre_msg_set_status(req->rq_repmsg, 0);
1282         RETURN(rc);
1283 }
1284
1285 static int ost_get_info(struct obd_export *exp, struct ptlrpc_request *req)
1286 {
1287         void *key, *reply;
1288         int keylen, replylen, rc = 0;
1289         struct req_capsule *pill = &req->rq_pill;
1290         ENTRY;
1291
1292         /* this common part for get_info rpc */
1293         key = req_capsule_client_get(pill, &RMF_SETINFO_KEY);
1294         if (key == NULL) {
1295                 DEBUG_REQ(D_HA, req, "no get_info key");
1296                 RETURN(-EFAULT);
1297         }
1298         keylen = req_capsule_get_size(pill, &RMF_SETINFO_KEY, RCL_CLIENT);
1299
1300         if (KEY_IS(KEY_FIEMAP)) {
1301                 struct ll_fiemap_info_key *fm_key = key;
1302                 int rc;
1303
1304                 rc = ost_validate_obdo(exp, &fm_key->oa, NULL);
1305                 if (rc)
1306                         RETURN(rc);
1307         }
1308
1309         rc = obd_get_info(req->rq_svc_thread->t_env, exp, keylen, key,
1310                           &replylen, NULL, NULL);
1311         if (rc)
1312                 RETURN(rc);
1313
1314         req_capsule_set_size(pill, &RMF_GENERIC_DATA,
1315                              RCL_SERVER, replylen);
1316
1317         rc = req_capsule_server_pack(pill);
1318         if (rc)
1319                 RETURN(rc);
1320
1321         reply = req_capsule_server_get(pill, &RMF_GENERIC_DATA);
1322         if (reply == NULL)
1323                 RETURN(-ENOMEM);
1324
1325         /* call again to fill in the reply buffer */
1326         rc = obd_get_info(req->rq_svc_thread->t_env, exp, keylen, key,
1327                           &replylen, reply, NULL);
1328
1329         lustre_msg_set_status(req->rq_repmsg, 0);
1330         RETURN(rc);
1331 }
1332
1333 static int ost_handle_quotactl(struct ptlrpc_request *req)
1334 {
1335         struct obd_quotactl *oqctl, *repoqc;
1336         int rc;
1337         ENTRY;
1338
1339         oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1340         if (oqctl == NULL)
1341                 GOTO(out, rc = -EPROTO);
1342
1343         rc = req_capsule_server_pack(&req->rq_pill);
1344         if (rc)
1345                 GOTO(out, rc);
1346
1347         repoqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1348         req->rq_status = obd_quotactl(req->rq_export, oqctl);
1349         *repoqc = *oqctl;
1350
1351 out:
1352         RETURN(rc);
1353 }
1354
1355 static int ost_handle_quotacheck(struct ptlrpc_request *req)
1356 {
1357         struct obd_quotactl *oqctl;
1358         int rc;
1359         ENTRY;
1360
1361         oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1362         if (oqctl == NULL)
1363                 RETURN(-EPROTO);
1364
1365         rc = req_capsule_server_pack(&req->rq_pill);
1366         if (rc)
1367                 RETURN(-ENOMEM);
1368
1369         /* deprecated, not used any more */
1370         req->rq_status = -EOPNOTSUPP;
1371         RETURN(-EOPNOTSUPP);
1372 }
1373
1374 static int ost_llog_handle_connect(struct obd_export *exp,
1375                                    struct ptlrpc_request *req)
1376 {
1377         struct llogd_conn_body *body;
1378         int rc;
1379         ENTRY;
1380
1381         body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_CONN_BODY);
1382         rc = obd_llog_connect(exp, body);
1383         RETURN(rc);
1384 }
1385
1386 #define ost_init_sec_none(reply, exp)                                   \
1387 do {                                                                    \
1388         reply->ocd_connect_flags &= ~(OBD_CONNECT_RMT_CLIENT |          \
1389                                       OBD_CONNECT_RMT_CLIENT_FORCE |    \
1390                                       OBD_CONNECT_OSS_CAPA);            \
1391         spin_lock(&exp->exp_lock);                                      \
1392         exp->exp_connect_flags = reply->ocd_connect_flags;              \
1393         spin_unlock(&exp->exp_lock);                                    \
1394 } while (0)
1395
1396 static int ost_init_sec_level(struct ptlrpc_request *req)
1397 {
1398         struct obd_export *exp = req->rq_export;
1399         struct req_capsule *pill = &req->rq_pill;
1400         struct obd_device *obd = exp->exp_obd;
1401         struct filter_obd *filter = &obd->u.filter;
1402         char *client = libcfs_nid2str(req->rq_peer.nid);
1403         struct obd_connect_data *data, *reply;
1404         int rc = 0, remote;
1405         ENTRY;
1406
1407         data = req_capsule_client_get(pill, &RMF_CONNECT_DATA);
1408         reply = req_capsule_server_get(pill, &RMF_CONNECT_DATA);
1409         if (data == NULL || reply == NULL)
1410                 RETURN(-EFAULT);
1411
1412         /* connection from MDT is always trusted */
1413         if (req->rq_auth_usr_mdt) {
1414                 ost_init_sec_none(reply, exp);
1415                 RETURN(0);
1416         }
1417
1418         /* no GSS support case */
1419         if (!req->rq_auth_gss) {
1420                 if (filter->fo_sec_level > LUSTRE_SEC_NONE) {
1421                         CWARN("client %s -> target %s does not user GSS, "
1422                               "can not run under security level %d.\n",
1423                               client, obd->obd_name, filter->fo_sec_level);
1424                         RETURN(-EACCES);
1425                 } else {
1426                         ost_init_sec_none(reply, exp);
1427                         RETURN(0);
1428                 }
1429         }
1430
1431         /* old version case */
1432         if (unlikely(!(data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) ||
1433                      !(data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA))) {
1434                 if (filter->fo_sec_level > LUSTRE_SEC_NONE) {
1435                         CWARN("client %s -> target %s uses old version, "
1436                               "can not run under security level %d.\n",
1437                               client, obd->obd_name, filter->fo_sec_level);
1438                         RETURN(-EACCES);
1439                 } else {
1440                         CWARN("client %s -> target %s uses old version, "
1441                               "run under security level %d.\n",
1442                               client, obd->obd_name, filter->fo_sec_level);
1443                         ost_init_sec_none(reply, exp);
1444                         RETURN(0);
1445                 }
1446         }
1447
1448         remote = data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT_FORCE;
1449         if (remote) {
1450                 if (!req->rq_auth_remote)
1451                         CDEBUG(D_SEC, "client (local realm) %s -> target %s "
1452                                "asked to be remote.\n", client, obd->obd_name);
1453         } else if (req->rq_auth_remote) {
1454                 remote = 1;
1455                 CDEBUG(D_SEC, "client (remote realm) %s -> target %s is set "
1456                        "as remote by default.\n", client, obd->obd_name);
1457         }
1458
1459         if (remote) {
1460                 if (!filter->fo_fl_oss_capa) {
1461                         CDEBUG(D_SEC, "client %s -> target %s is set as remote,"
1462                                " but OSS capabilities are not enabled: %d.\n",
1463                                client, obd->obd_name, filter->fo_fl_oss_capa);
1464                         RETURN(-EACCES);
1465                 }
1466         }
1467
1468         switch (filter->fo_sec_level) {
1469         case LUSTRE_SEC_NONE:
1470                 if (!remote) {
1471                         ost_init_sec_none(reply, exp);
1472                         break;
1473                 } else {
1474                         CDEBUG(D_SEC, "client %s -> target %s is set as remote, "
1475                                "can not run under security level %d.\n",
1476                                client, obd->obd_name, filter->fo_sec_level);
1477                         RETURN(-EACCES);
1478                 }
1479         case LUSTRE_SEC_REMOTE:
1480                 if (!remote)
1481                         ost_init_sec_none(reply, exp);
1482                 break;
1483         case LUSTRE_SEC_ALL:
1484                 if (!remote) {
1485                         reply->ocd_connect_flags &= ~(OBD_CONNECT_RMT_CLIENT |
1486                                                       OBD_CONNECT_RMT_CLIENT_FORCE);
1487                         if (!filter->fo_fl_oss_capa)
1488                                 reply->ocd_connect_flags &= ~OBD_CONNECT_OSS_CAPA;
1489
1490                         spin_lock(&exp->exp_lock);
1491                         exp->exp_connect_flags = reply->ocd_connect_flags;
1492                         spin_unlock(&exp->exp_lock);
1493                 }
1494                 break;
1495         default:
1496                 RETURN(-EINVAL);
1497         }
1498
1499         RETURN(rc);
1500 }
1501
1502 /*
1503  * FIXME
1504  * this should be done in filter_connect()/filter_reconnect(), but
1505  * we can't obtain information like NID, which stored in incoming
1506  * request, thus can't decide what flavor to use. so we do it here.
1507  *
1508  * This hack should be removed after the OST stack be rewritten, just
1509  * like what we are doing in mdt_obd_connect()/mdt_obd_reconnect().
1510  */
1511 static int ost_connect_check_sptlrpc(struct ptlrpc_request *req)
1512 {
1513         struct obd_export     *exp = req->rq_export;
1514         struct filter_obd     *filter = &exp->exp_obd->u.filter;
1515         struct sptlrpc_flavor  flvr;
1516         int                    rc = 0;
1517
1518         if (unlikely(strcmp(exp->exp_obd->obd_type->typ_name,
1519                             LUSTRE_ECHO_NAME) == 0)) {
1520                 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
1521                 return 0;
1522         }
1523
1524         if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
1525                 read_lock(&filter->fo_sptlrpc_lock);
1526                 sptlrpc_target_choose_flavor(&filter->fo_sptlrpc_rset,
1527                                              req->rq_sp_from,
1528                                              req->rq_peer.nid,
1529                                              &flvr);
1530                 read_unlock(&filter->fo_sptlrpc_lock);
1531
1532                 spin_lock(&exp->exp_lock);
1533
1534                 exp->exp_sp_peer = req->rq_sp_from;
1535                 exp->exp_flvr = flvr;
1536
1537                 if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
1538                     exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
1539                         CERROR("unauthorized rpc flavor %x from %s, "
1540                                "expect %x\n", req->rq_flvr.sf_rpc,
1541                                libcfs_nid2str(req->rq_peer.nid),
1542                                exp->exp_flvr.sf_rpc);
1543                         rc = -EACCES;
1544                 }
1545
1546                 spin_unlock(&exp->exp_lock);
1547         } else {
1548                 if (exp->exp_sp_peer != req->rq_sp_from) {
1549                         CERROR("RPC source %s doesn't match %s\n",
1550                                sptlrpc_part2name(req->rq_sp_from),
1551                                sptlrpc_part2name(exp->exp_sp_peer));
1552                         rc = -EACCES;
1553                 } else {
1554                         rc = sptlrpc_target_export_check(exp, req);
1555                 }
1556         }
1557
1558         return rc;
1559 }
1560
1561 /* Ensure that data and metadata are synced to the disk when lock is cancelled
1562  * (if requested) */
1563 int ost_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
1564                      void *data, int flag)
1565 {
1566         struct lu_env   env;
1567         __u32           sync_lock_cancel = 0;
1568         __u32           len = sizeof(sync_lock_cancel);
1569         int             rc = 0;
1570
1571         ENTRY;
1572
1573         rc = lu_env_init(&env, LCT_DT_THREAD);
1574         if (unlikely(rc != 0))
1575                 RETURN(rc);
1576
1577         rc = obd_get_info(&env, lock->l_export, sizeof(KEY_SYNC_LOCK_CANCEL),
1578                           KEY_SYNC_LOCK_CANCEL, &len, &sync_lock_cancel, NULL);
1579         if (rc == 0 && flag == LDLM_CB_CANCELING &&
1580             (lock->l_granted_mode & (LCK_PW|LCK_GROUP)) &&
1581             (sync_lock_cancel == ALWAYS_SYNC_ON_CANCEL ||
1582              (sync_lock_cancel == BLOCKING_SYNC_ON_CANCEL &&
1583               lock->l_flags & LDLM_FL_CBPENDING))) {
1584                 struct obd_info *oinfo;
1585                 struct obdo     *oa;
1586                 int              rc;
1587
1588                 OBD_ALLOC_PTR(oinfo);
1589                 if (!oinfo)
1590                         GOTO(out_env, rc = -ENOMEM);
1591                 OBDO_ALLOC(oa);
1592                 if (!oa) {
1593                         OBD_FREE_PTR(oinfo);
1594                         GOTO(out_env, rc = -ENOMEM);
1595                 }
1596                 oa->o_id = lock->l_resource->lr_name.name[0];
1597                 oa->o_seq = lock->l_resource->lr_name.name[1];
1598                 oa->o_valid = OBD_MD_FLID|OBD_MD_FLGROUP;
1599                 oinfo->oi_oa = oa;
1600                 oinfo->oi_capa = BYPASS_CAPA;
1601
1602                 rc = obd_sync(&env, lock->l_export, oinfo,
1603                               lock->l_policy_data.l_extent.start,
1604                               lock->l_policy_data.l_extent.end, NULL);
1605                 if (rc)
1606                         CERROR("Error %d syncing data on lock cancel\n", rc);
1607
1608                 OBDO_FREE(oa);
1609                 OBD_FREE_PTR(oinfo);
1610         }
1611
1612         rc = ldlm_server_blocking_ast(lock, desc, data, flag);
1613 out_env:
1614         lu_env_fini(&env);
1615         RETURN(rc);
1616 }
1617
1618 static int ost_filter_recovery_request(struct ptlrpc_request *req,
1619                                        struct obd_device *obd, int *process)
1620 {
1621         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1622         case OST_CONNECT: /* This will never get here, but for completeness. */
1623         case OST_DISCONNECT:
1624                *process = 1;
1625                RETURN(0);
1626
1627         case OBD_PING:
1628         case OST_CREATE:
1629         case OST_DESTROY:
1630         case OST_PUNCH:
1631         case OST_SETATTR:
1632         case OST_SYNC:
1633         case OST_WRITE:
1634         case OBD_LOG_CANCEL:
1635         case LDLM_ENQUEUE:
1636                 *process = target_queue_recovery_request(req, obd);
1637                 RETURN(0);
1638
1639         default:
1640                 DEBUG_REQ(D_WARNING, req, "not permitted during recovery");
1641                 *process = -EAGAIN;
1642                 RETURN(0);
1643         }
1644 }
1645
1646 int ost_msg_check_version(struct lustre_msg *msg)
1647 {
1648         int rc;
1649
1650         switch(lustre_msg_get_opc(msg)) {
1651         case OST_CONNECT:
1652         case OST_DISCONNECT:
1653         case OBD_PING:
1654         case SEC_CTX_INIT:
1655         case SEC_CTX_INIT_CONT:
1656         case SEC_CTX_FINI:
1657                 rc = lustre_msg_check_version(msg, LUSTRE_OBD_VERSION);
1658                 if (rc)
1659                         CERROR("bad opc %u version %08x, expecting %08x\n",
1660                                lustre_msg_get_opc(msg),
1661                                lustre_msg_get_version(msg),
1662                                LUSTRE_OBD_VERSION);
1663                 break;
1664         case OST_CREATE:
1665         case OST_DESTROY:
1666         case OST_GETATTR:
1667         case OST_SETATTR:
1668         case OST_WRITE:
1669         case OST_READ:
1670         case OST_PUNCH:
1671         case OST_STATFS:
1672         case OST_SYNC:
1673         case OST_SET_INFO:
1674         case OST_GET_INFO:
1675         case OST_QUOTACHECK:
1676         case OST_QUOTACTL:
1677                 rc = lustre_msg_check_version(msg, LUSTRE_OST_VERSION);
1678                 if (rc)
1679                         CERROR("bad opc %u version %08x, expecting %08x\n",
1680                                lustre_msg_get_opc(msg),
1681                                lustre_msg_get_version(msg),
1682                                LUSTRE_OST_VERSION);
1683                 break;
1684         case LDLM_ENQUEUE:
1685         case LDLM_CONVERT:
1686         case LDLM_CANCEL:
1687         case LDLM_BL_CALLBACK:
1688         case LDLM_CP_CALLBACK:
1689                 rc = lustre_msg_check_version(msg, LUSTRE_DLM_VERSION);
1690                 if (rc)
1691                         CERROR("bad opc %u version %08x, expecting %08x\n",
1692                                lustre_msg_get_opc(msg),
1693                                lustre_msg_get_version(msg),
1694                                LUSTRE_DLM_VERSION);
1695                 break;
1696         case LLOG_ORIGIN_CONNECT:
1697         case OBD_LOG_CANCEL:
1698                 rc = lustre_msg_check_version(msg, LUSTRE_LOG_VERSION);
1699                 if (rc)
1700                         CERROR("bad opc %u version %08x, expecting %08x\n",
1701                                lustre_msg_get_opc(msg),
1702                                lustre_msg_get_version(msg),
1703                                LUSTRE_LOG_VERSION);
1704                 break;
1705         case OST_QUOTA_ADJUST_QUNIT:
1706                 rc = -ENOTSUPP;
1707                 CERROR("Quota adjust is deprecated as of 2.4.0\n");
1708                 break;
1709         default:
1710                 CERROR("Unexpected opcode %d\n", lustre_msg_get_opc(msg));
1711                 rc = -ENOTSUPP;
1712         }
1713         return rc;
1714 }
1715
1716 struct ost_prolong_data {
1717         struct ptlrpc_request *opd_req;
1718         struct obd_export     *opd_exp;
1719         struct obdo           *opd_oa;
1720         struct ldlm_res_id     opd_resid;
1721         struct ldlm_extent     opd_extent;
1722         ldlm_mode_t            opd_mode;
1723         unsigned int           opd_locks;
1724         int                    opd_timeout;
1725 };
1726
1727 /* prolong locks for the current service time of the corresponding
1728  * portal (= OST_IO_PORTAL)
1729  */
1730 static inline int prolong_timeout(struct ptlrpc_request *req)
1731 {
1732         struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt;
1733
1734         if (AT_OFF)
1735                 return obd_timeout / 2;
1736
1737         return max(at_est2timeout(at_get(&svcpt->scp_at_estimate)),
1738                    ldlm_timeout);
1739 }
1740
1741 static void ost_prolong_lock_one(struct ost_prolong_data *opd,
1742                                  struct ldlm_lock *lock)
1743 {
1744         LASSERT(lock->l_export == opd->opd_exp);
1745
1746         if (lock->l_destroyed) /* lock already cancelled */
1747                 return;
1748
1749         /* XXX: never try to grab resource lock here because we're inside
1750          * exp_bl_list_lock; in ldlm_lockd.c to handle waiting list we take
1751          * res lock and then exp_bl_list_lock. */
1752
1753         if (!(lock->l_flags & LDLM_FL_AST_SENT))
1754                 /* ignore locks not being cancelled */
1755                 return;
1756
1757         LDLM_DEBUG(lock,
1758                    "refreshed for req x"LPU64" ext("LPU64"->"LPU64") to %ds.\n",
1759                    opd->opd_req->rq_xid, opd->opd_extent.start,
1760                    opd->opd_extent.end, opd->opd_timeout);
1761
1762         /* OK. this is a possible lock the user holds doing I/O
1763          * let's refresh eviction timer for it */
1764         ldlm_refresh_waiting_lock(lock, opd->opd_timeout);
1765         ++opd->opd_locks;
1766 }
1767
1768 static void ost_prolong_locks(struct ost_prolong_data *data)
1769 {
1770         struct obd_export *exp = data->opd_exp;
1771         struct obdo       *oa  = data->opd_oa;
1772         struct ldlm_lock  *lock;
1773         ENTRY;
1774
1775         if (oa->o_valid & OBD_MD_FLHANDLE) {
1776                 /* mostly a request should be covered by only one lock, try
1777                  * fast path. */
1778                 lock = ldlm_handle2lock(&oa->o_handle);
1779                 if (lock != NULL) {
1780                         /* Fast path to check if the lock covers the whole IO
1781                          * region exclusively. */
1782                         if (lock->l_granted_mode == LCK_PW &&
1783                             ldlm_extent_contain(&lock->l_policy_data.l_extent,
1784                                                 &data->opd_extent)) {
1785                                 /* bingo */
1786                                 ost_prolong_lock_one(data, lock);
1787                                 LDLM_LOCK_PUT(lock);
1788                                 RETURN_EXIT;
1789                         }
1790                         LDLM_LOCK_PUT(lock);
1791                 }
1792         }
1793
1794
1795         spin_lock_bh(&exp->exp_bl_list_lock);
1796         cfs_list_for_each_entry(lock, &exp->exp_bl_list, l_exp_list) {
1797                 LASSERT(lock->l_flags & LDLM_FL_AST_SENT);
1798                 LASSERT(lock->l_resource->lr_type == LDLM_EXTENT);
1799
1800                 if (!ldlm_res_eq(&data->opd_resid, &lock->l_resource->lr_name))
1801                         continue;
1802
1803                 if (!ldlm_extent_overlap(&lock->l_policy_data.l_extent,
1804                                          &data->opd_extent))
1805                         continue;
1806
1807                 ost_prolong_lock_one(data, lock);
1808         }
1809         spin_unlock_bh(&exp->exp_bl_list_lock);
1810
1811         EXIT;
1812 }
1813
1814 /**
1815  * Returns 1 if the given PTLRPC matches the given LDLM locks, or 0 if it does
1816  * not.
1817  */
1818 static int ost_rw_hpreq_lock_match(struct ptlrpc_request *req,
1819                                    struct ldlm_lock *lock)
1820 {
1821         struct niobuf_remote *nb;
1822         struct obd_ioobj *ioo;
1823         int mode, opc;
1824         struct ldlm_extent ext;
1825         ENTRY;
1826
1827         opc = lustre_msg_get_opc(req->rq_reqmsg);
1828         LASSERT(opc == OST_READ || opc == OST_WRITE);
1829
1830         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
1831         LASSERT(ioo != NULL);
1832
1833         nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
1834         LASSERT(nb != NULL);
1835
1836         ext.start = nb->offset;
1837         nb += ioo->ioo_bufcnt - 1;
1838         ext.end = nb->offset + nb->len - 1;
1839
1840         LASSERT(lock->l_resource != NULL);
1841         if (!osc_res_name_eq(ioo->ioo_id, ioo->ioo_seq,
1842                              &lock->l_resource->lr_name))
1843                 RETURN(0);
1844
1845         mode = LCK_PW;
1846         if (opc == OST_READ)
1847                 mode |= LCK_PR;
1848         if (!(lock->l_granted_mode & mode))
1849                 RETURN(0);
1850
1851         RETURN(ldlm_extent_overlap(&lock->l_policy_data.l_extent, &ext));
1852 }
1853
1854 /**
1855  * High-priority queue request check for whether the given PTLRPC request (\a
1856  * req) is blocking an LDLM lock cancel.
1857  *
1858  * Returns 1 if the given given PTLRPC request (\a req) is blocking an LDLM lock
1859  * cancel, 0 if it is not, and -EFAULT if the request is malformed.
1860  *
1861  * Only OST_READs, OST_WRITEs and OST_PUNCHes go on the h-p RPC queue.  This
1862  * function looks only at OST_READs and OST_WRITEs.
1863  */
1864 static int ost_rw_hpreq_check(struct ptlrpc_request *req)
1865 {
1866         struct obd_device *obd = req->rq_export->exp_obd;
1867         struct ost_body *body;
1868         struct obd_ioobj *ioo;
1869         struct niobuf_remote *nb;
1870         struct ost_prolong_data opd = { 0 };
1871         int mode, opc;
1872         ENTRY;
1873
1874         /*
1875          * Use LASSERT to do sanity check because malformed RPCs should have
1876          * been filtered out in ost_hpreq_handler().
1877          */
1878         opc = lustre_msg_get_opc(req->rq_reqmsg);
1879         LASSERT(opc == OST_READ || opc == OST_WRITE);
1880
1881         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
1882         LASSERT(body != NULL);
1883
1884         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
1885         LASSERT(ioo != NULL);
1886
1887         nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
1888         LASSERT(nb != NULL);
1889         LASSERT(!(nb->flags & OBD_BRW_SRVLOCK));
1890
1891         osc_build_res_name(ioo->ioo_id, ioo->ioo_seq, &opd.opd_resid);
1892
1893         opd.opd_req = req;
1894         mode = LCK_PW;
1895         if (opc == OST_READ)
1896                 mode |= LCK_PR;
1897         opd.opd_mode = mode;
1898         opd.opd_exp = req->rq_export;
1899         opd.opd_oa  = &body->oa;
1900         opd.opd_extent.start = nb->offset;
1901         nb += ioo->ioo_bufcnt - 1;
1902         opd.opd_extent.end = nb->offset + nb->len - 1;
1903         opd.opd_timeout = prolong_timeout(req);
1904
1905         DEBUG_REQ(D_RPCTRACE, req,
1906                "%s %s: refresh rw locks: " LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
1907                obd->obd_name, cfs_current()->comm,
1908                opd.opd_resid.name[0], opd.opd_resid.name[1],
1909                opd.opd_extent.start, opd.opd_extent.end);
1910
1911         ost_prolong_locks(&opd);
1912
1913         CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
1914                obd->obd_name, opd.opd_locks, req);
1915
1916         RETURN(opd.opd_locks);
1917 }
1918
1919 static void ost_rw_hpreq_fini(struct ptlrpc_request *req)
1920 {
1921         (void)ost_rw_hpreq_check(req);
1922 }
1923
1924 /**
1925  * Like ost_rw_hpreq_lock_match(), but for OST_PUNCH RPCs.
1926  */
1927 static int ost_punch_hpreq_lock_match(struct ptlrpc_request *req,
1928                                       struct ldlm_lock *lock)
1929 {
1930         struct ost_body *body;
1931         ENTRY;
1932
1933         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
1934         LASSERT(body != NULL);
1935
1936         if (body->oa.o_valid & OBD_MD_FLHANDLE &&
1937             body->oa.o_handle.cookie == lock->l_handle.h_cookie)
1938                 RETURN(1);
1939
1940         RETURN(0);
1941 }
1942
1943 /**
1944  * Like ost_rw_hpreq_check(), but for OST_PUNCH RPCs.
1945  */
1946 static int ost_punch_hpreq_check(struct ptlrpc_request *req)
1947 {
1948         struct obd_device *obd = req->rq_export->exp_obd;
1949         struct ost_body *body;
1950         struct obdo *oa;
1951         struct ost_prolong_data opd = { 0 };
1952         __u64 start, end;
1953         ENTRY;
1954
1955         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
1956         LASSERT(body != NULL);
1957
1958         oa = &body->oa;
1959         LASSERT(!(oa->o_valid & OBD_MD_FLFLAGS) ||
1960                 !(oa->o_flags & OBD_FL_SRVLOCK));
1961
1962         start = oa->o_size;
1963         end = start + oa->o_blocks;
1964
1965         opd.opd_req = req;
1966         opd.opd_mode = LCK_PW;
1967         opd.opd_exp = req->rq_export;
1968         opd.opd_oa  = oa;
1969         opd.opd_extent.start = start;
1970         opd.opd_extent.end   = end;
1971         if (oa->o_blocks == OBD_OBJECT_EOF)
1972                 opd.opd_extent.end = OBD_OBJECT_EOF;
1973         opd.opd_timeout = prolong_timeout(req);
1974
1975         osc_build_res_name(oa->o_id, oa->o_seq, &opd.opd_resid);
1976
1977         CDEBUG(D_DLMTRACE,
1978                "%s: refresh locks: "LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
1979                obd->obd_name,
1980                opd.opd_resid.name[0], opd.opd_resid.name[1],
1981                opd.opd_extent.start, opd.opd_extent.end);
1982
1983         ost_prolong_locks(&opd);
1984
1985         CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
1986                obd->obd_name, opd.opd_locks, req);
1987
1988         RETURN(opd.opd_locks > 0);
1989 }
1990
1991 static void ost_punch_hpreq_fini(struct ptlrpc_request *req)
1992 {
1993         (void)ost_punch_hpreq_check(req);
1994 }
1995
1996 struct ptlrpc_hpreq_ops ost_hpreq_rw = {
1997         .hpreq_lock_match = ost_rw_hpreq_lock_match,
1998         .hpreq_check      = ost_rw_hpreq_check,
1999         .hpreq_fini       = ost_rw_hpreq_fini
2000 };
2001
2002 struct ptlrpc_hpreq_ops ost_hpreq_punch = {
2003         .hpreq_lock_match = ost_punch_hpreq_lock_match,
2004         .hpreq_check      = ost_punch_hpreq_check,
2005         .hpreq_fini       = ost_punch_hpreq_fini
2006 };
2007
2008 /** Assign high priority operations to the request if needed. */
2009 static int ost_io_hpreq_handler(struct ptlrpc_request *req)
2010 {
2011         ENTRY;
2012         if (req->rq_export) {
2013                 int opc = lustre_msg_get_opc(req->rq_reqmsg);
2014                 struct ost_body *body;
2015
2016                 if (opc == OST_READ || opc == OST_WRITE) {
2017                         struct niobuf_remote *nb;
2018                         struct obd_ioobj *ioo;
2019                         int objcount, niocount;
2020                         int rc;
2021                         int i;
2022
2023                         /* RPCs on the H-P queue can be inspected before
2024                          * ost_handler() initializes their pills, so we
2025                          * initialize that here.  Capsule initialization is
2026                          * idempotent, as is setting the pill's format (provided
2027                          * it doesn't change).
2028                          */
2029                         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2030                         if (opc == OST_READ)
2031                                 req_capsule_set(&req->rq_pill,
2032                                                 &RQF_OST_BRW_READ);
2033                         else
2034                                 req_capsule_set(&req->rq_pill,
2035                                                 &RQF_OST_BRW_WRITE);
2036
2037                         body = req_capsule_client_get(&req->rq_pill,
2038                                                       &RMF_OST_BODY);
2039                         if (body == NULL) {
2040                                 CERROR("Missing/short ost_body\n");
2041                                 RETURN(-EFAULT);
2042                         }
2043
2044                         objcount = req_capsule_get_size(&req->rq_pill,
2045                                                         &RMF_OBD_IOOBJ,
2046                                                         RCL_CLIENT) /
2047                                                         sizeof(*ioo);
2048                         if (objcount == 0) {
2049                                 CERROR("Missing/short ioobj\n");
2050                                 RETURN(-EFAULT);
2051                         }
2052                         if (objcount > 1) {
2053                                 CERROR("too many ioobjs (%d)\n", objcount);
2054                                 RETURN(-EFAULT);
2055                         }
2056
2057                         ioo = req_capsule_client_get(&req->rq_pill,
2058                                                      &RMF_OBD_IOOBJ);
2059                         if (ioo == NULL) {
2060                                 CERROR("Missing/short ioobj\n");
2061                                 RETURN(-EFAULT);
2062                         }
2063
2064                         rc = ost_validate_obdo(req->rq_export, &body->oa, ioo);
2065                         if (rc) {
2066                                 CERROR("invalid object ids\n");
2067                                 RETURN(rc);
2068                         }
2069
2070                         for (niocount = i = 0; i < objcount; i++) {
2071                                 if (ioo[i].ioo_bufcnt == 0) {
2072                                         CERROR("ioo[%d] has zero bufcnt\n", i);
2073                                         RETURN(-EFAULT);
2074                                 }
2075                                 niocount += ioo[i].ioo_bufcnt;
2076                         }
2077                         if (niocount > PTLRPC_MAX_BRW_PAGES) {
2078                                 DEBUG_REQ(D_RPCTRACE, req,
2079                                           "bulk has too many pages (%d)",
2080                                           niocount);
2081                                 RETURN(-EFAULT);
2082                         }
2083
2084                         nb = req_capsule_client_get(&req->rq_pill,
2085                                                     &RMF_NIOBUF_REMOTE);
2086                         if (nb == NULL) {
2087                                 CERROR("Missing/short niobuf\n");
2088                                 RETURN(-EFAULT);
2089                         }
2090
2091                         if (niocount == 0 || !(nb[0].flags & OBD_BRW_SRVLOCK))
2092                                 req->rq_ops = &ost_hpreq_rw;
2093                 } else if (opc == OST_PUNCH) {
2094                         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2095                         req_capsule_set(&req->rq_pill, &RQF_OST_PUNCH);
2096
2097                         body = req_capsule_client_get(&req->rq_pill,
2098                                                       &RMF_OST_BODY);
2099                         if (body == NULL) {
2100                                 CERROR("Missing/short ost_body\n");
2101                                 RETURN(-EFAULT);
2102                         }
2103
2104                         if (!(body->oa.o_valid & OBD_MD_FLFLAGS) ||
2105                             !(body->oa.o_flags & OBD_FL_SRVLOCK))
2106                                 req->rq_ops = &ost_hpreq_punch;
2107                 }
2108         }
2109         RETURN(0);
2110 }
2111
2112 /* TODO: handle requests in a similar way as MDT: see mdt_handle_common() */
2113 int ost_handle(struct ptlrpc_request *req)
2114 {
2115         struct obd_trans_info trans_info = { 0, };
2116         struct obd_trans_info *oti = &trans_info;
2117         int should_process, fail = OBD_FAIL_OST_ALL_REPLY_NET, rc = 0;
2118         struct obd_device *obd = NULL;
2119         ENTRY;
2120
2121         /* OST module is kept between remounts, but the last reference
2122          * to specific module (say, osd or ofd) kills all related keys
2123          * from the environment. so we have to refill it until the root
2124          * cause is fixed properly */
2125         lu_env_refill(req->rq_svc_thread->t_env);
2126
2127         LASSERT(current->journal_info == NULL);
2128
2129         /* primordial rpcs don't affect server recovery */
2130         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2131         case SEC_CTX_INIT:
2132         case SEC_CTX_INIT_CONT:
2133         case SEC_CTX_FINI:
2134                 GOTO(out, rc = 0);
2135         }
2136
2137         req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2138
2139         if (lustre_msg_get_opc(req->rq_reqmsg) != OST_CONNECT) {
2140                 if (!class_connected_export(req->rq_export)) {
2141                         CDEBUG(D_HA,"operation %d on unconnected OST from %s\n",
2142                                lustre_msg_get_opc(req->rq_reqmsg),
2143                                libcfs_id2str(req->rq_peer));
2144                         req->rq_status = -ENOTCONN;
2145                         GOTO(out, rc = -ENOTCONN);
2146                 }
2147
2148                 obd = req->rq_export->exp_obd;
2149
2150                 /* Check for aborted recovery. */
2151                 if (obd->obd_recovering) {
2152                         rc = ost_filter_recovery_request(req, obd,
2153                                                          &should_process);
2154                         if (rc || !should_process)
2155                                 RETURN(rc);
2156                         else if (should_process < 0) {
2157                                 req->rq_status = should_process;
2158                                 rc = ptlrpc_error(req);
2159                                 RETURN(rc);
2160                         }
2161                 }
2162         }
2163
2164         oti_init(oti, req);
2165
2166         rc = ost_msg_check_version(req->rq_reqmsg);
2167         if (rc)
2168                 RETURN(rc);
2169
2170         if (req && req->rq_reqmsg && req->rq_export &&
2171             (req->rq_export->exp_connect_flags & OBD_CONNECT_JOBSTATS))
2172                 oti->oti_jobid = lustre_msg_get_jobid(req->rq_reqmsg);
2173
2174         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2175         case OST_CONNECT: {
2176                 CDEBUG(D_INODE, "connect\n");
2177                 req_capsule_set(&req->rq_pill, &RQF_OST_CONNECT);
2178                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_CONNECT_NET))
2179                         RETURN(0);
2180                 rc = target_handle_connect(req);
2181                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_CONNECT_NET2))
2182                         RETURN(0);
2183                 if (!rc) {
2184                         rc = ost_init_sec_level(req);
2185                         if (!rc)
2186                                 rc = ost_connect_check_sptlrpc(req);
2187                 }
2188                 break;
2189         }
2190         case OST_DISCONNECT:
2191                 CDEBUG(D_INODE, "disconnect\n");
2192                 req_capsule_set(&req->rq_pill, &RQF_OST_DISCONNECT);
2193                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_DISCONNECT_NET))
2194                         RETURN(0);
2195                 rc = target_handle_disconnect(req);
2196                 break;
2197         case OST_CREATE:
2198                 CDEBUG(D_INODE, "create\n");
2199                 req_capsule_set(&req->rq_pill, &RQF_OST_CREATE);
2200                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_CREATE_NET))
2201                         RETURN(0);
2202                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
2203                         GOTO(out, rc = -EROFS);
2204                 rc = ost_create(req->rq_export, req, oti);
2205                 break;
2206         case OST_DESTROY:
2207                 CDEBUG(D_INODE, "destroy\n");
2208                 req_capsule_set(&req->rq_pill, &RQF_OST_DESTROY);
2209                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_DESTROY_NET))
2210                         RETURN(0);
2211                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
2212                         GOTO(out, rc = -EROFS);
2213                 rc = ost_destroy(req->rq_export, req, oti);
2214                 break;
2215         case OST_GETATTR:
2216                 CDEBUG(D_INODE, "getattr\n");
2217                 req_capsule_set(&req->rq_pill, &RQF_OST_GETATTR);
2218                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_GETATTR_NET))
2219                         RETURN(0);
2220                 rc = ost_getattr(req->rq_export, req);
2221                 break;
2222         case OST_SETATTR:
2223                 CDEBUG(D_INODE, "setattr\n");
2224                 req_capsule_set(&req->rq_pill, &RQF_OST_SETATTR);
2225                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_SETATTR_NET))
2226                         RETURN(0);
2227                 rc = ost_setattr(req->rq_export, req, oti);
2228                 break;
2229         case OST_WRITE:
2230                 req_capsule_set(&req->rq_pill, &RQF_OST_BRW_WRITE);
2231                 CDEBUG(D_INODE, "write\n");
2232                 /* req->rq_request_portal would be nice, if it was set */
2233                 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL) {
2234                         CERROR("%s: deny write request from %s to portal %u\n",
2235                                req->rq_export->exp_obd->obd_name,
2236                                obd_export_nid2str(req->rq_export),
2237                                ptlrpc_req2svc(req)->srv_req_portal);
2238                         GOTO(out, rc = -EPROTO);
2239                 }
2240                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_NET))
2241                         RETURN(0);
2242                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOSPC))
2243                         GOTO(out, rc = -ENOSPC);
2244                 if (OBD_FAIL_TIMEOUT(OBD_FAIL_OST_EROFS, 1))
2245                         GOTO(out, rc = -EROFS);
2246                 rc = ost_brw_write(req, oti);
2247                 LASSERT(current->journal_info == NULL);
2248                 /* ost_brw_write sends its own replies */
2249                 RETURN(rc);
2250         case OST_READ:
2251                 req_capsule_set(&req->rq_pill, &RQF_OST_BRW_READ);
2252                 CDEBUG(D_INODE, "read\n");
2253                 /* req->rq_request_portal would be nice, if it was set */
2254                 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL) {
2255                         CERROR("%s: deny read request from %s to portal %u\n",
2256                                req->rq_export->exp_obd->obd_name,
2257                                obd_export_nid2str(req->rq_export),
2258                                ptlrpc_req2svc(req)->srv_req_portal);
2259                         GOTO(out, rc = -EPROTO);
2260                 }
2261                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_NET))
2262                         RETURN(0);
2263                 rc = ost_brw_read(req, oti);
2264                 LASSERT(current->journal_info == NULL);
2265                 /* ost_brw_read sends its own replies */
2266                 RETURN(rc);
2267         case OST_PUNCH:
2268                 CDEBUG(D_INODE, "punch\n");
2269                 req_capsule_set(&req->rq_pill, &RQF_OST_PUNCH);
2270                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_PUNCH_NET))
2271                         RETURN(0);
2272                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
2273                         GOTO(out, rc = -EROFS);
2274                 rc = ost_punch(req->rq_export, req, oti);
2275                 break;
2276         case OST_STATFS:
2277                 CDEBUG(D_INODE, "statfs\n");
2278                 req_capsule_set(&req->rq_pill, &RQF_OST_STATFS);
2279                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_STATFS_NET))
2280                         RETURN(0);
2281                 rc = ost_statfs(req);
2282                 break;
2283         case OST_SYNC:
2284                 CDEBUG(D_INODE, "sync\n");
2285                 req_capsule_set(&req->rq_pill, &RQF_OST_SYNC);
2286                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_SYNC_NET))
2287                         RETURN(0);
2288                 rc = ost_sync(req->rq_export, req, oti);
2289                 break;
2290         case OST_SET_INFO:
2291                 DEBUG_REQ(D_INODE, req, "set_info");
2292                 req_capsule_set(&req->rq_pill, &RQF_OBD_SET_INFO);
2293                 rc = ost_set_info(req->rq_export, req);
2294                 break;
2295         case OST_GET_INFO:
2296                 DEBUG_REQ(D_INODE, req, "get_info");
2297                 req_capsule_set(&req->rq_pill, &RQF_OST_GET_INFO_GENERIC);
2298                 rc = ost_get_info(req->rq_export, req);
2299                 break;
2300         case OST_QUOTACHECK:
2301                 CDEBUG(D_INODE, "quotacheck\n");
2302                 req_capsule_set(&req->rq_pill, &RQF_OST_QUOTACHECK);
2303                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_QUOTACHECK_NET))
2304                         RETURN(0);
2305                 rc = ost_handle_quotacheck(req);
2306                 break;
2307         case OST_QUOTACTL:
2308                 CDEBUG(D_INODE, "quotactl\n");
2309                 req_capsule_set(&req->rq_pill, &RQF_OST_QUOTACTL);
2310                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_QUOTACTL_NET))
2311                         RETURN(0);
2312                 rc = ost_handle_quotactl(req);
2313                 break;
2314         case OBD_PING:
2315                 DEBUG_REQ(D_INODE, req, "ping");
2316                 req_capsule_set(&req->rq_pill, &RQF_OBD_PING);
2317                 rc = target_handle_ping(req);
2318                 break;
2319         /* FIXME - just reply status */
2320         case LLOG_ORIGIN_CONNECT:
2321                 DEBUG_REQ(D_INODE, req, "log connect");
2322                 req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_CONNECT);
2323                 rc = ost_llog_handle_connect(req->rq_export, req);
2324                 req->rq_status = rc;
2325                 rc = req_capsule_server_pack(&req->rq_pill);
2326                 if (rc)
2327                         RETURN(rc);
2328                 RETURN(ptlrpc_reply(req));
2329         case OBD_LOG_CANCEL:
2330                 CDEBUG(D_INODE, "log cancel\n");
2331                 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
2332                 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
2333                         RETURN(0);
2334                 rc = llog_origin_handle_cancel(req);
2335                 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
2336                         RETURN(0);
2337                 req->rq_status = rc;
2338                 rc = req_capsule_server_pack(&req->rq_pill);
2339                 if (rc)
2340                         RETURN(rc);
2341                 RETURN(ptlrpc_reply(req));
2342         case LDLM_ENQUEUE:
2343                 CDEBUG(D_INODE, "enqueue\n");
2344                 req_capsule_set(&req->rq_pill, &RQF_LDLM_ENQUEUE);
2345                 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_NET))
2346                         RETURN(0);
2347                 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
2348                                          ost_blocking_ast,
2349                                          ldlm_server_glimpse_ast);
2350                 fail = OBD_FAIL_OST_LDLM_REPLY_NET;
2351                 break;
2352         case LDLM_CONVERT:
2353                 CDEBUG(D_INODE, "convert\n");
2354                 req_capsule_set(&req->rq_pill, &RQF_LDLM_CONVERT);
2355                 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CONVERT_NET))
2356                         RETURN(0);
2357                 rc = ldlm_handle_convert(req);
2358                 break;
2359         case LDLM_CANCEL:
2360                 CDEBUG(D_INODE, "cancel\n");
2361                 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
2362                 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_NET))
2363                         RETURN(0);
2364                 rc = ldlm_handle_cancel(req);
2365                 break;
2366         case LDLM_BL_CALLBACK:
2367         case LDLM_CP_CALLBACK:
2368                 CDEBUG(D_INODE, "callback\n");
2369                 CERROR("callbacks should not happen on OST\n");
2370                 /* fall through */
2371         default:
2372                 CERROR("Unexpected opcode %d\n",
2373                        lustre_msg_get_opc(req->rq_reqmsg));
2374                 req->rq_status = -ENOTSUPP;
2375                 rc = ptlrpc_error(req);
2376                 RETURN(rc);
2377         }
2378
2379         LASSERT(current->journal_info == NULL);
2380
2381         EXIT;
2382         /* If we're DISCONNECTing, the export_data is already freed */
2383         if (!rc && lustre_msg_get_opc(req->rq_reqmsg) != OST_DISCONNECT)
2384                 target_committed_to_req(req);
2385
2386 out:
2387         if (!rc)
2388                 oti_to_request(oti, req);
2389
2390         target_send_reply(req, rc, fail);
2391         return 0;
2392 }
2393 EXPORT_SYMBOL(ost_handle);
2394
2395 /*
2396  * free per-thread pool created by ost_io_thread_init().
2397  */
2398 static void ost_io_thread_done(struct ptlrpc_thread *thread)
2399 {
2400         struct ost_thread_local_cache *tls; /* TLS stands for Thread-Local
2401                                              * Storage */
2402
2403         ENTRY;
2404
2405         LASSERT(thread != NULL);
2406
2407         /*
2408          * be prepared to handle partially-initialized pools (because this is
2409          * called from ost_io_thread_init() for cleanup.
2410          */
2411         tls = thread->t_data;
2412         if (tls != NULL) {
2413                 OBD_FREE_PTR(tls);
2414                 thread->t_data = NULL;
2415         }
2416         EXIT;
2417 }
2418
2419 /*
2420  * initialize per-thread page pool (bug 5137).
2421  */
2422 static int ost_io_thread_init(struct ptlrpc_thread *thread)
2423 {
2424         struct ost_thread_local_cache *tls;
2425
2426         ENTRY;
2427
2428         LASSERT(thread != NULL);
2429         LASSERT(thread->t_data == NULL);
2430
2431         OBD_ALLOC_PTR(tls);
2432         if (tls == NULL)
2433                 RETURN(-ENOMEM);
2434         thread->t_data = tls;
2435         RETURN(0);
2436 }
2437
2438 #define OST_WATCHDOG_TIMEOUT (obd_timeout * 1000)
2439
2440 static struct cfs_cpt_table     *ost_io_cptable;
2441
2442 /* Sigh - really, this is an OSS, the _server_, not the _target_ */
2443 static int ost_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
2444 {
2445         static struct ptlrpc_service_conf       svc_conf;
2446         struct ost_obd *ost = &obd->u.ost;
2447         struct lprocfs_static_vars lvars;
2448         nodemask_t              *mask;
2449         int rc;
2450         ENTRY;
2451
2452         rc = cfs_cleanup_group_info();
2453         if (rc)
2454                 RETURN(rc);
2455
2456         lprocfs_ost_init_vars(&lvars);
2457         lprocfs_obd_setup(obd, lvars.obd_vars);
2458
2459         mutex_init(&ost->ost_health_mutex);
2460
2461         svc_conf = (typeof(svc_conf)) {
2462                 .psc_name               = LUSTRE_OSS_NAME,
2463                 .psc_watchdog_factor    = OSS_SERVICE_WATCHDOG_FACTOR,
2464                 .psc_buf                = {
2465                         .bc_nbufs               = OST_NBUFS,
2466                         .bc_buf_size            = OST_BUFSIZE,
2467                         .bc_req_max_size        = OST_MAXREQSIZE,
2468                         .bc_rep_max_size        = OST_MAXREPSIZE,
2469                         .bc_req_portal          = OST_REQUEST_PORTAL,
2470                         .bc_rep_portal          = OSC_REPLY_PORTAL,
2471                 },
2472                 .psc_thr                = {
2473                         .tc_thr_name            = "ll_ost",
2474                         .tc_thr_factor          = OSS_THR_FACTOR,
2475                         .tc_nthrs_init          = OSS_NTHRS_INIT,
2476                         .tc_nthrs_base          = OSS_NTHRS_BASE,
2477                         .tc_nthrs_max           = OSS_NTHRS_MAX,
2478                         .tc_nthrs_user          = oss_num_threads,
2479                         .tc_cpu_affinity        = 1,
2480                         .tc_ctx_tags            = LCT_DT_THREAD,
2481                 },
2482                 .psc_cpt                = {
2483                         .cc_pattern             = oss_cpts,
2484                 },
2485                 .psc_ops                = {
2486                         .so_req_handler         = ost_handle,
2487                         .so_req_printer         = target_print_req,
2488                         .so_hpreq_handler       = ptlrpc_hpreq_handler,
2489                 },
2490         };
2491         ost->ost_service = ptlrpc_register_service(&svc_conf,
2492                                                    obd->obd_proc_entry);
2493         if (IS_ERR(ost->ost_service)) {
2494                 rc = PTR_ERR(ost->ost_service);
2495                 CERROR("failed to start service: %d\n", rc);
2496                 GOTO(out_lprocfs, rc);
2497         }
2498
2499         memset(&svc_conf, 0, sizeof(svc_conf));
2500         svc_conf = (typeof(svc_conf)) {
2501                 .psc_name               = "ost_create",
2502                 .psc_watchdog_factor    = OSS_SERVICE_WATCHDOG_FACTOR,
2503                 .psc_buf                = {
2504                         .bc_nbufs               = OST_NBUFS,
2505                         .bc_buf_size            = OST_BUFSIZE,
2506                         .bc_req_max_size        = OST_MAXREQSIZE,
2507                         .bc_rep_max_size        = OST_MAXREPSIZE,
2508                         .bc_req_portal          = OST_CREATE_PORTAL,
2509                         .bc_rep_portal          = OSC_REPLY_PORTAL,
2510                 },
2511                 .psc_thr                = {
2512                         .tc_thr_name            = "ll_ost_create",
2513                         .tc_thr_factor          = OSS_CR_THR_FACTOR,
2514                         .tc_nthrs_init          = OSS_CR_NTHRS_INIT,
2515                         .tc_nthrs_base          = OSS_CR_NTHRS_BASE,
2516                         .tc_nthrs_max           = OSS_CR_NTHRS_MAX,
2517                         .tc_nthrs_user          = oss_num_create_threads,
2518                         .tc_cpu_affinity        = 1,
2519                         .tc_ctx_tags            = LCT_DT_THREAD,
2520                 },
2521                 .psc_cpt                = {
2522                         .cc_pattern             = oss_cpts,
2523                 },
2524                 .psc_ops                = {
2525                         .so_req_handler         = ost_handle,
2526                         .so_req_printer         = target_print_req,
2527                 },
2528         };
2529         ost->ost_create_service = ptlrpc_register_service(&svc_conf,
2530                                                           obd->obd_proc_entry);
2531         if (IS_ERR(ost->ost_create_service)) {
2532                 rc = PTR_ERR(ost->ost_create_service);
2533                 CERROR("failed to start OST create service: %d\n", rc);
2534                 GOTO(out_service, rc);
2535         }
2536
2537         mask = cfs_cpt_table->ctb_nodemask;
2538         /* event CPT feature is disabled in libcfs level by set partition
2539          * number to 1, we still want to set node affinity for io service */
2540         if (cfs_cpt_number(cfs_cpt_table) == 1 && nodes_weight(*mask) > 1) {
2541                 int     cpt = 0;
2542                 int     i;
2543
2544                 ost_io_cptable = cfs_cpt_table_alloc(nodes_weight(*mask));
2545                 for_each_node_mask(i, *mask) {
2546                         if (ost_io_cptable == NULL) {
2547                                 CWARN("OSS failed to create CPT table\n");
2548                                 break;
2549                         }
2550
2551                         rc = cfs_cpt_set_node(ost_io_cptable, cpt++, i);
2552                         if (!rc) {
2553                                 CWARN("OSS Failed to set node %d for"
2554                                       "IO CPT table\n", i);
2555                                 cfs_cpt_table_free(ost_io_cptable);
2556                                 ost_io_cptable = NULL;
2557                                 break;
2558                         }
2559                 }
2560         }
2561
2562         memset(&svc_conf, 0, sizeof(svc_conf));
2563         svc_conf = (typeof(svc_conf)) {
2564                 .psc_name               = "ost_io",
2565                 .psc_watchdog_factor    = OSS_SERVICE_WATCHDOG_FACTOR,
2566                 .psc_buf                = {
2567                         .bc_nbufs               = OST_NBUFS,
2568                         .bc_buf_size            = OST_BUFSIZE,
2569                         .bc_req_max_size        = OST_MAXREQSIZE,
2570                         .bc_rep_max_size        = OST_MAXREPSIZE,
2571                         .bc_req_portal          = OST_IO_PORTAL,
2572                         .bc_rep_portal          = OSC_REPLY_PORTAL,
2573                 },
2574                 .psc_thr                = {
2575                         .tc_thr_name            = "ll_ost_io",
2576                         .tc_thr_factor          = OSS_THR_FACTOR,
2577                         .tc_nthrs_init          = OSS_NTHRS_INIT,
2578                         .tc_nthrs_base          = OSS_NTHRS_BASE,
2579                         .tc_nthrs_max           = OSS_NTHRS_MAX,
2580                         .tc_nthrs_user          = oss_num_threads,
2581                         .tc_cpu_affinity        = 1,
2582                         .tc_ctx_tags            = LCT_DT_THREAD,
2583                 },
2584                 .psc_cpt                = {
2585                         .cc_cptable             = ost_io_cptable,
2586                         .cc_pattern             = ost_io_cptable == NULL ?
2587                                                   oss_io_cpts : NULL,
2588                 },
2589                 .psc_ops                = {
2590                         .so_thr_init            = ost_io_thread_init,
2591                         .so_thr_done            = ost_io_thread_done,
2592                         .so_req_handler         = ost_handle,
2593                         .so_hpreq_handler       = ost_io_hpreq_handler,
2594                         .so_req_printer         = target_print_req,
2595                 },
2596         };
2597         ost->ost_io_service = ptlrpc_register_service(&svc_conf,
2598                                                       obd->obd_proc_entry);
2599         if (IS_ERR(ost->ost_io_service)) {
2600                 rc = PTR_ERR(ost->ost_io_service);
2601                 CERROR("failed to start OST I/O service: %d\n", rc);
2602                 ost->ost_io_service = NULL;
2603                 GOTO(out_create, rc);
2604         }
2605
2606         ping_evictor_start();
2607
2608         RETURN(0);
2609
2610 out_create:
2611         ptlrpc_unregister_service(ost->ost_create_service);
2612         ost->ost_create_service = NULL;
2613 out_service:
2614         ptlrpc_unregister_service(ost->ost_service);
2615         ost->ost_service = NULL;
2616 out_lprocfs:
2617         lprocfs_obd_cleanup(obd);
2618         RETURN(rc);
2619 }
2620
2621 static int ost_cleanup(struct obd_device *obd)
2622 {
2623         struct ost_obd *ost = &obd->u.ost;
2624         int err = 0;
2625         ENTRY;
2626
2627         ping_evictor_stop();
2628
2629         /* there is no recovery for OST OBD, all recovery is controlled by
2630          * obdfilter OBD */
2631         LASSERT(obd->obd_recovering == 0);
2632         mutex_lock(&ost->ost_health_mutex);
2633         ptlrpc_unregister_service(ost->ost_service);
2634         ptlrpc_unregister_service(ost->ost_create_service);
2635         ptlrpc_unregister_service(ost->ost_io_service);
2636         ost->ost_service = NULL;
2637         ost->ost_create_service = NULL;
2638         ost->ost_io_service = NULL;
2639
2640         mutex_unlock(&ost->ost_health_mutex);
2641
2642         lprocfs_obd_cleanup(obd);
2643
2644         if (ost_io_cptable != NULL) {
2645                 cfs_cpt_table_free(ost_io_cptable);
2646                 ost_io_cptable = NULL;
2647         }
2648
2649         RETURN(err);
2650 }
2651
2652 static int ost_health_check(const struct lu_env *env, struct obd_device *obd)
2653 {
2654         struct ost_obd *ost = &obd->u.ost;
2655         int rc = 0;
2656
2657         mutex_lock(&ost->ost_health_mutex);
2658         rc |= ptlrpc_service_health_check(ost->ost_service);
2659         rc |= ptlrpc_service_health_check(ost->ost_create_service);
2660         rc |= ptlrpc_service_health_check(ost->ost_io_service);
2661         mutex_unlock(&ost->ost_health_mutex);
2662
2663         /*
2664          * health_check to return 0 on healthy
2665          * and 1 on unhealthy.
2666          */
2667         if( rc != 0)
2668                 rc = 1;
2669
2670         return rc;
2671 }
2672
2673 struct ost_thread_local_cache *ost_tls(struct ptlrpc_request *r)
2674 {
2675         return (struct ost_thread_local_cache *)(r->rq_svc_thread->t_data);
2676 }
2677
2678 /* use obd ops to offer management infrastructure */
2679 static struct obd_ops ost_obd_ops = {
2680         .o_owner        = THIS_MODULE,
2681         .o_setup        = ost_setup,
2682         .o_cleanup      = ost_cleanup,
2683         .o_health_check = ost_health_check,
2684 };
2685
2686
2687 static int __init ost_init(void)
2688 {
2689         struct lprocfs_static_vars lvars;
2690         int rc;
2691         ENTRY;
2692
2693         ost_page_to_corrupt = cfs_alloc_page(CFS_ALLOC_STD);
2694
2695         lprocfs_ost_init_vars(&lvars);
2696         rc = class_register_type(&ost_obd_ops, NULL, lvars.module_vars,
2697                                  LUSTRE_OSS_NAME, NULL);
2698
2699         if (ost_num_threads != 0 && oss_num_threads == 0) {
2700                 LCONSOLE_INFO("ost_num_threads module parameter is deprecated, "
2701                               "use oss_num_threads instead or unset both for "
2702                               "dynamic thread startup\n");
2703                 oss_num_threads = ost_num_threads;
2704         }
2705
2706         RETURN(rc);
2707 }
2708
2709 static void /*__exit*/ ost_exit(void)
2710 {
2711         if (ost_page_to_corrupt)
2712                 page_cache_release(ost_page_to_corrupt);
2713
2714         class_unregister_type(LUSTRE_OSS_NAME);
2715 }
2716
2717 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2718 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
2719 MODULE_LICENSE("GPL");
2720
2721 module_init(ost_init);
2722 module_exit(ost_exit);