lustre/mdc/mdc_request.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2013, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_MDC
  38
  39 #ifdef __KERNEL__
  40 # include <linux/module.h>
  41 # include <linux/pagemap.h>
  42 # include <linux/miscdevice.h>
  43 # include <linux/init.h>
  44 # include <linux/utsname.h>
  45 #else
  46 # include <liblustre.h>
  47 #endif
  48
  49 #include <lustre_acl.h>
  50 #include <obd_class.h>
  51 #include <lustre_fid.h>
  52 #include <lprocfs_status.h>
  53 #include <lustre_param.h>
  54 #include <lustre_log.h>
  55
  56 #include "mdc_internal.h"
  57
  58 #define REQUEST_MINOR 244
  59
  60 struct mdc_renew_capa_args {
  61         struct obd_capa        *ra_oc;
  62         renew_capa_cb_t         ra_cb;
  63 };
  64
  65 static int mdc_cleanup(struct obd_device *obd);
  66
  67 int mdc_unpack_capa(struct obd_export *exp, struct ptlrpc_request *req,
  68                     const struct req_msg_field *field, struct obd_capa **oc)
  69 {
  70         struct lustre_capa *capa;
  71         struct obd_capa *c;
  72         ENTRY;
  73
  74         /* swabbed already in mdc_enqueue */
  75         capa = req_capsule_server_get(&req->rq_pill, field);
  76         if (capa == NULL)
  77                 RETURN(-EPROTO);
  78
  79         c = alloc_capa(CAPA_SITE_CLIENT);
  80         if (IS_ERR(c)) {
  81                 CDEBUG(D_INFO, "alloc capa failed!\n");
  82                 RETURN(PTR_ERR(c));
  83         } else {
  84                 c->c_capa = *capa;
  85                 *oc = c;
  86                 RETURN(0);
  87         }
  88 }
  89
  90 static inline int mdc_queue_wait(struct ptlrpc_request *req)
  91 {
  92         struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
  93         int rc;
  94
  95         /* mdc_enter_request() ensures that this client has no more
  96          * than cl_max_rpcs_in_flight RPCs simultaneously inf light
  97          * against an MDT. */
  98         rc = mdc_enter_request(cli);
  99         if (rc != 0)
 100                 return rc;
 101
 102         rc = ptlrpc_queue_wait(req);
 103         mdc_exit_request(cli);
 104
 105         return rc;
 106 }
 107
 108 /* Helper that implements most of mdc_getstatus and signal_completed_replay. */
 109 /* XXX this should become mdc_get_info("key"), sending MDS_GET_INFO RPC */
 110 static int send_getstatus(struct obd_import *imp, struct lu_fid *rootfid,
 111                           struct obd_capa **pc, int level, int msg_flags)
 112 {
 113         struct ptlrpc_request *req;
 114         struct mdt_body       *body;
 115         int                    rc;
 116         ENTRY;
 117
 118         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_GETSTATUS,
 119                                         LUSTRE_MDS_VERSION, MDS_GETSTATUS);
 120         if (req == NULL)
 121                 RETURN(-ENOMEM);
 122
 123         mdc_pack_body(req, NULL, NULL, 0, 0, -1, 0);
 124         lustre_msg_add_flags(req->rq_reqmsg, msg_flags);
 125         req->rq_send_state = level;
 126
 127         ptlrpc_request_set_replen(req);
 128
 129         rc = ptlrpc_queue_wait(req);
 130         if (rc)
 131                 GOTO(out, rc);
 132
 133         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 134         if (body == NULL)
 135                 GOTO(out, rc = -EPROTO);
 136
 137         if (body->valid & OBD_MD_FLMDSCAPA) {
 138                 rc = mdc_unpack_capa(NULL, req, &RMF_CAPA1, pc);
 139                 if (rc)
 140                         GOTO(out, rc);
 141         }
 142
 143         *rootfid = body->fid1;
 144         CDEBUG(D_NET,
 145                "root fid="DFID", last_committed="LPU64"\n",
 146                PFID(rootfid),
 147                lustre_msg_get_last_committed(req->rq_repmsg));
 148         EXIT;
 149 out:
 150         ptlrpc_req_finished(req);
 151         return rc;
 152 }
 153
 154 /* This should be mdc_get_info("rootfid") */
 155 int mdc_getstatus(struct obd_export *exp, struct lu_fid *rootfid,
 156                   struct obd_capa **pc)
 157 {
 158         return send_getstatus(class_exp2cliimp(exp), rootfid, pc,
 159                               LUSTRE_IMP_FULL, 0);
 160 }
 161
 162 /*
 163  * This function now is known to always saying that it will receive 4 buffers
 164  * from server. Even for cases when acl_size and md_size is zero, RPC header
 165  * will contain 4 fields and RPC itself will contain zero size fields. This is
 166  * because mdt_getattr*() _always_ returns 4 fields, but if acl is not needed
 167  * and thus zero, it shrinks it, making zero size. The same story about
 168  * md_size. And this is course of problem when client waits for smaller number
 169  * of fields. This issue will be fixed later when client gets aware of RPC
 170  * layouts.  --umka
 171  */
 172 static int mdc_getattr_common(struct obd_export *exp,
 173                               struct ptlrpc_request *req)
 174 {
 175         struct req_capsule *pill = &req->rq_pill;
 176         struct mdt_body    *body;
 177         void               *eadata;
 178         int                 rc;
 179         ENTRY;
 180
 181         /* Request message already built. */
 182         rc = ptlrpc_queue_wait(req);
 183         if (rc != 0)
 184                 RETURN(rc);
 185
 186         /* sanity check for the reply */
 187         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 188         if (body == NULL)
 189                 RETURN(-EPROTO);
 190
 191         CDEBUG(D_NET, "mode: %o\n", body->mode);
 192
 193         if (body->eadatasize != 0) {
 194                 mdc_update_max_ea_from_body(exp, body);
 195
 196                 eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
 197                                                       body->eadatasize);
 198                 if (eadata == NULL)
 199                         RETURN(-EPROTO);
 200         }
 201
 202         if (body->valid & OBD_MD_FLRMTPERM) {
 203                 struct mdt_remote_perm *perm;
 204
 205                 LASSERT(client_is_remote(exp));
 206                 perm = req_capsule_server_swab_get(pill, &RMF_ACL,
 207                                                 lustre_swab_mdt_remote_perm);
 208                 if (perm == NULL)
 209                         RETURN(-EPROTO);
 210         }
 211
 212         if (body->valid & OBD_MD_FLMDSCAPA) {
 213                 struct lustre_capa *capa;
 214                 capa = req_capsule_server_get(pill, &RMF_CAPA1);
 215                 if (capa == NULL)
 216                         RETURN(-EPROTO);
 217         }
 218
 219         RETURN(0);
 220 }
 221
 222 int mdc_getattr(struct obd_export *exp, struct md_op_data *op_data,
 223                 struct ptlrpc_request **request)
 224 {
 225         struct ptlrpc_request *req;
 226         int                    rc;
 227         ENTRY;
 228
 229         /* Single MDS without an LMV case */
 230         if (op_data->op_flags & MF_GET_MDT_IDX) {
 231                 op_data->op_mds = 0;
 232                 RETURN(0);
 233         }
 234         *request = NULL;
 235         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
 236         if (req == NULL)
 237                 RETURN(-ENOMEM);
 238
 239         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 240
 241         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
 242         if (rc) {
 243                 ptlrpc_request_free(req);
 244                 RETURN(rc);
 245         }
 246
 247         mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
 248                       op_data->op_valid, op_data->op_mode, -1, 0);
 249
 250         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
 251                              op_data->op_mode);
 252         if (op_data->op_valid & OBD_MD_FLRMTPERM) {
 253                 LASSERT(client_is_remote(exp));
 254                 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
 255                                      sizeof(struct mdt_remote_perm));
 256         }
 257         ptlrpc_request_set_replen(req);
 258
 259         rc = mdc_getattr_common(exp, req);
 260         if (rc)
 261                 ptlrpc_req_finished(req);
 262         else
 263                 *request = req;
 264         RETURN(rc);
 265 }
 266
 267 int mdc_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
 268                      struct ptlrpc_request **request)
 269 {
 270         struct ptlrpc_request *req;
 271         int                    rc;
 272         ENTRY;
 273
 274         *request = NULL;
 275         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 276                                    &RQF_MDS_GETATTR_NAME);
 277         if (req == NULL)
 278                 RETURN(-ENOMEM);
 279
 280         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 281         req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
 282                              op_data->op_namelen + 1);
 283
 284         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR_NAME);
 285         if (rc) {
 286                 ptlrpc_request_free(req);
 287                 RETURN(rc);
 288         }
 289
 290         mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
 291                       op_data->op_valid, op_data->op_mode,
 292                       op_data->op_suppgids[0], 0);
 293
 294         if (op_data->op_name) {
 295                 char *name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 296                 LASSERT(strnlen(op_data->op_name, op_data->op_namelen) ==
 297                                 op_data->op_namelen);
 298                 memcpy(name, op_data->op_name, op_data->op_namelen);
 299         }
 300
 301         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
 302                              op_data->op_mode);
 303         ptlrpc_request_set_replen(req);
 304
 305         rc = mdc_getattr_common(exp, req);
 306         if (rc)
 307                 ptlrpc_req_finished(req);
 308         else
 309                 *request = req;
 310         RETURN(rc);
 311 }
 312
 313 static int mdc_is_subdir(struct obd_export *exp,
 314                          const struct lu_fid *pfid,
 315                          const struct lu_fid *cfid,
 316                          struct ptlrpc_request **request)
 317 {
 318         struct ptlrpc_request  *req;
 319         int                     rc;
 320
 321         ENTRY;
 322
 323         *request = NULL;
 324         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 325                                         &RQF_MDS_IS_SUBDIR, LUSTRE_MDS_VERSION,
 326                                         MDS_IS_SUBDIR);
 327         if (req == NULL)
 328                 RETURN(-ENOMEM);
 329
 330         mdc_is_subdir_pack(req, pfid, cfid, 0);
 331         ptlrpc_request_set_replen(req);
 332
 333         rc = ptlrpc_queue_wait(req);
 334         if (rc && rc != -EREMOTE)
 335                 ptlrpc_req_finished(req);
 336         else
 337                 *request = req;
 338         RETURN(rc);
 339 }
 340
 341 static int mdc_xattr_common(struct obd_export *exp,const struct req_format *fmt,
 342                             const struct lu_fid *fid,
 343                             struct obd_capa *oc, int opcode, obd_valid valid,
 344                             const char *xattr_name, const char *input,
 345                             int input_size, int output_size, int flags,
 346                             __u32 suppgid, struct ptlrpc_request **request)
 347 {
 348         struct ptlrpc_request *req;
 349         int   xattr_namelen = 0;
 350         char *tmp;
 351         int   rc;
 352         ENTRY;
 353
 354         *request = NULL;
 355         req = ptlrpc_request_alloc(class_exp2cliimp(exp), fmt);
 356         if (req == NULL)
 357                 RETURN(-ENOMEM);
 358
 359         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 360         if (xattr_name) {
 361                 xattr_namelen = strlen(xattr_name) + 1;
 362                 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
 363                                      xattr_namelen);
 364         }
 365         if (input_size) {
 366                 LASSERT(input);
 367                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
 368                                      input_size);
 369         }
 370
 371         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, opcode);
 372         if (rc) {
 373                 ptlrpc_request_free(req);
 374                 RETURN(rc);
 375         }
 376
 377         if (opcode == MDS_REINT) {
 378                 struct mdt_rec_setxattr *rec;
 379
 380                 CLASSERT(sizeof(struct mdt_rec_setxattr) ==
 381                          sizeof(struct mdt_rec_reint));
 382                 rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
 383                 rec->sx_opcode = REINT_SETXATTR;
 384                 /* TODO:
 385                  *  cfs_curproc_fs{u,g}id() should replace
 386                  *  current->fs{u,g}id for portability.
 387                  */
 388                 rec->sx_fsuid  = cfs_curproc_fsuid();
 389                 rec->sx_fsgid  = cfs_curproc_fsgid();
 390                 rec->sx_cap    = cfs_curproc_cap_pack();
 391                 rec->sx_suppgid1 = suppgid;
 392                 rec->sx_suppgid2 = -1;
 393                 rec->sx_fid    = *fid;
 394                 rec->sx_valid  = valid | OBD_MD_FLCTIME;
 395                 rec->sx_time   = cfs_time_current_sec();
 396                 rec->sx_size   = output_size;
 397                 rec->sx_flags  = flags;
 398
 399                 mdc_pack_capa(req, &RMF_CAPA1, oc);
 400         } else {
 401                 mdc_pack_body(req, fid, oc, valid, output_size, suppgid, flags);
 402         }
 403
 404         if (xattr_name) {
 405                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 406                 memcpy(tmp, xattr_name, xattr_namelen);
 407         }
 408         if (input_size) {
 409                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
 410                 memcpy(tmp, input, input_size);
 411         }
 412
 413         if (req_capsule_has_field(&req->rq_pill, &RMF_EADATA, RCL_SERVER))
 414                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
 415                                      RCL_SERVER, output_size);
 416         ptlrpc_request_set_replen(req);
 417
 418         /* make rpc */
 419         if (opcode == MDS_REINT)
 420                 mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 421
 422         rc = ptlrpc_queue_wait(req);
 423
 424         if (opcode == MDS_REINT)
 425                 mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 426
 427         if (rc)
 428                 ptlrpc_req_finished(req);
 429         else
 430                 *request = req;
 431         RETURN(rc);
 432 }
 433
 434 int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid,
 435                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 436                  const char *input, int input_size, int output_size,
 437                  int flags, __u32 suppgid, struct ptlrpc_request **request)
 438 {
 439         return mdc_xattr_common(exp, &RQF_MDS_REINT_SETXATTR,
 440                                 fid, oc, MDS_REINT, valid, xattr_name,
 441                                 input, input_size, output_size, flags,
 442                                 suppgid, request);
 443 }
 444
 445 int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid,
 446                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 447                  const char *input, int input_size, int output_size,
 448                  int flags, struct ptlrpc_request **request)
 449 {
 450         return mdc_xattr_common(exp, &RQF_MDS_GETXATTR,
 451                                 fid, oc, MDS_GETXATTR, valid, xattr_name,
 452                                 input, input_size, output_size, flags,
 453                                 -1, request);
 454 }
 455
 456 #ifdef CONFIG_FS_POSIX_ACL
 457 static int mdc_unpack_acl(struct ptlrpc_request *req, struct lustre_md *md)
 458 {
 459         struct req_capsule     *pill = &req->rq_pill;
 460         struct mdt_body        *body = md->body;
 461         struct posix_acl       *acl;
 462         void                   *buf;
 463         int                     rc;
 464         ENTRY;
 465
 466         if (!body->aclsize)
 467                 RETURN(0);
 468
 469         buf = req_capsule_server_sized_get(pill, &RMF_ACL, body->aclsize);
 470
 471         if (!buf)
 472                 RETURN(-EPROTO);
 473
 474         acl = posix_acl_from_xattr(&init_user_ns, buf, body->aclsize);
 475         if (IS_ERR(acl)) {
 476                 rc = PTR_ERR(acl);
 477                 CERROR("convert xattr to acl: %d\n", rc);
 478                 RETURN(rc);
 479         }
 480
 481         rc = posix_acl_valid(acl);
 482         if (rc) {
 483                 CERROR("validate acl: %d\n", rc);
 484                 posix_acl_release(acl);
 485                 RETURN(rc);
 486         }
 487
 488         md->posix_acl = acl;
 489         RETURN(0);
 490 }
 491 #else
 492 #define mdc_unpack_acl(req, md) 0
 493 #endif
 494
 495 int mdc_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
 496                       struct obd_export *dt_exp, struct obd_export *md_exp,
 497                       struct lustre_md *md)
 498 {
 499         struct req_capsule *pill = &req->rq_pill;
 500         int rc;
 501         ENTRY;
 502
 503         LASSERT(md);
 504         memset(md, 0, sizeof(*md));
 505
 506         md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 507         LASSERT(md->body != NULL);
 508
 509         if (md->body->valid & OBD_MD_FLEASIZE) {
 510                 int lmmsize;
 511                 struct lov_mds_md *lmm;
 512
 513                 if (!S_ISREG(md->body->mode)) {
 514                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, should be a "
 515                                "regular file, but is not\n");
 516                         GOTO(out, rc = -EPROTO);
 517                 }
 518
 519                 if (md->body->eadatasize == 0) {
 520                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, "
 521                                "but eadatasize 0\n");
 522                         GOTO(out, rc = -EPROTO);
 523                 }
 524                 lmmsize = md->body->eadatasize;
 525                 lmm = req_capsule_server_sized_get(pill, &RMF_MDT_MD, lmmsize);
 526                 if (!lmm)
 527                         GOTO(out, rc = -EPROTO);
 528
 529                 rc = obd_unpackmd(dt_exp, &md->lsm, lmm, lmmsize);
 530                 if (rc < 0)
 531                         GOTO(out, rc);
 532
 533                 if (rc < sizeof(*md->lsm)) {
 534                         CDEBUG(D_INFO, "lsm size too small: "
 535                                "rc < sizeof (*md->lsm) (%d < %d)\n",
 536                                rc, (int)sizeof(*md->lsm));
 537                         GOTO(out, rc = -EPROTO);
 538                 }
 539
 540         } else if (md->body->valid & OBD_MD_FLDIREA) {
 541                 int lmvsize;
 542                 struct lov_mds_md *lmv;
 543
 544                 if(!S_ISDIR(md->body->mode)) {
 545                         CDEBUG(D_INFO, "OBD_MD_FLDIREA set, should be a "
 546                                "directory, but is not\n");
 547                         GOTO(out, rc = -EPROTO);
 548                 }
 549
 550                 if (md->body->eadatasize == 0) {
 551                         CDEBUG(D_INFO, "OBD_MD_FLDIREA is set, "
 552                                "but eadatasize 0\n");
 553                         RETURN(-EPROTO);
 554                 }
 555                 if (md->body->valid & OBD_MD_MEA) {
 556                         lmvsize = md->body->eadatasize;
 557                         lmv = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
 558                                                            lmvsize);
 559                         if (!lmv)
 560                                 GOTO(out, rc = -EPROTO);
 561
 562                         rc = obd_unpackmd(md_exp, (void *)&md->mea, lmv,
 563                                           lmvsize);
 564                         if (rc < 0)
 565                                 GOTO(out, rc);
 566
 567                         if (rc < sizeof(*md->mea)) {
 568                                 CDEBUG(D_INFO, "size too small:  "
 569                                        "rc < sizeof(*md->mea) (%d < %d)\n",
 570                                         rc, (int)sizeof(*md->mea));
 571                                 GOTO(out, rc = -EPROTO);
 572                         }
 573                 }
 574         }
 575         rc = 0;
 576
 577         if (md->body->valid & OBD_MD_FLRMTPERM) {
 578                 /* remote permission */
 579                 LASSERT(client_is_remote(exp));
 580                 md->remote_perm = req_capsule_server_swab_get(pill, &RMF_ACL,
 581                                                 lustre_swab_mdt_remote_perm);
 582                 if (!md->remote_perm)
 583                         GOTO(out, rc = -EPROTO);
 584         }
 585         else if (md->body->valid & OBD_MD_FLACL) {
 586                 /* for ACL, it's possible that FLACL is set but aclsize is zero.
 587                  * only when aclsize != 0 there's an actual segment for ACL
 588                  * in reply buffer.
 589                  */
 590                 if (md->body->aclsize) {
 591                         rc = mdc_unpack_acl(req, md);
 592                         if (rc)
 593                                 GOTO(out, rc);
 594 #ifdef CONFIG_FS_POSIX_ACL
 595                 } else {
 596                         md->posix_acl = NULL;
 597 #endif
 598                 }
 599         }
 600         if (md->body->valid & OBD_MD_FLMDSCAPA) {
 601                 struct obd_capa *oc = NULL;
 602
 603                 rc = mdc_unpack_capa(NULL, req, &RMF_CAPA1, &oc);
 604                 if (rc)
 605                         GOTO(out, rc);
 606                 md->mds_capa = oc;
 607         }
 608
 609         if (md->body->valid & OBD_MD_FLOSSCAPA) {
 610                 struct obd_capa *oc = NULL;
 611
 612                 rc = mdc_unpack_capa(NULL, req, &RMF_CAPA2, &oc);
 613                 if (rc)
 614                         GOTO(out, rc);
 615                 md->oss_capa = oc;
 616         }
 617
 618         EXIT;
 619 out:
 620         if (rc) {
 621                 if (md->oss_capa) {
 622                         capa_put(md->oss_capa);
 623                         md->oss_capa = NULL;
 624                 }
 625                 if (md->mds_capa) {
 626                         capa_put(md->mds_capa);
 627                         md->mds_capa = NULL;
 628                 }
 629 #ifdef CONFIG_FS_POSIX_ACL
 630                 posix_acl_release(md->posix_acl);
 631 #endif
 632                 if (md->lsm)
 633                         obd_free_memmd(dt_exp, &md->lsm);
 634         }
 635         return rc;
 636 }
 637
 638 int mdc_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
 639 {
 640         ENTRY;
 641         RETURN(0);
 642 }
 643
 644 /**
 645  * Handles both OPEN and SETATTR RPCs for OPEN-CLOSE and SETATTR-DONE_WRITING
 646  * RPC chains.
 647  */
 648 void mdc_replay_open(struct ptlrpc_request *req)
 649 {
 650         struct md_open_data *mod = req->rq_cb_data;
 651         struct ptlrpc_request *close_req;
 652         struct obd_client_handle *och;
 653         struct lustre_handle old;
 654         struct mdt_body *body;
 655         ENTRY;
 656
 657         if (mod == NULL) {
 658                 DEBUG_REQ(D_ERROR, req,
 659                           "Can't properly replay without open data.");
 660                 EXIT;
 661                 return;
 662         }
 663
 664         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 665         LASSERT(body != NULL);
 666
 667         och = mod->mod_och;
 668         if (och != NULL) {
 669                 struct lustre_handle *file_fh;
 670
 671                 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
 672
 673                 file_fh = &och->och_fh;
 674                 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
 675                        file_fh->cookie, body->handle.cookie);
 676                 old = *file_fh;
 677                 *file_fh = body->handle;
 678         }
 679         close_req = mod->mod_close_req;
 680         if (close_req != NULL) {
 681                 __u32 opc = lustre_msg_get_opc(close_req->rq_reqmsg);
 682                 struct mdt_ioepoch *epoch;
 683
 684                 LASSERT(opc == MDS_CLOSE || opc == MDS_DONE_WRITING);
 685                 epoch = req_capsule_client_get(&close_req->rq_pill,
 686                                                &RMF_MDT_EPOCH);
 687                 LASSERT(epoch);
 688
 689                 if (och != NULL)
 690                         LASSERT(!memcmp(&old, &epoch->handle, sizeof(old)));
 691                 DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
 692                 epoch->handle = body->handle;
 693         }
 694         EXIT;
 695 }
 696
 697 void mdc_commit_open(struct ptlrpc_request *req)
 698 {
 699         struct md_open_data *mod = req->rq_cb_data;
 700         if (mod == NULL)
 701                 return;
 702
 703         /**
 704          * No need to touch md_open_data::mod_och, it holds a reference on
 705          * \var mod and will zero references to each other, \var mod will be
 706          * freed after that when md_open_data::mod_och will put the reference.
 707          */
 708
 709         /**
 710          * Do not let open request to disappear as it still may be needed
 711          * for close rpc to happen (it may happen on evict only, otherwise
 712          * ptlrpc_request::rq_replay does not let mdc_commit_open() to be
 713          * called), just mark this rpc as committed to distinguish these 2
 714          * cases, see mdc_close() for details. The open request reference will
 715          * be put along with freeing \var mod.
 716          */
 717         ptlrpc_request_addref(req);
 718         spin_lock(&req->rq_lock);
 719         req->rq_committed = 1;
 720         spin_unlock(&req->rq_lock);
 721         req->rq_cb_data = NULL;
 722         obd_mod_put(mod);
 723 }
 724
 725 int mdc_set_open_replay_data(struct obd_export *exp,
 726                              struct obd_client_handle *och,
 727                              struct ptlrpc_request *open_req)
 728 {
 729         struct md_open_data   *mod;
 730         struct mdt_rec_create *rec;
 731         struct mdt_body       *body;
 732         struct obd_import     *imp = open_req->rq_import;
 733         ENTRY;
 734
 735         if (!open_req->rq_replay)
 736                 RETURN(0);
 737
 738         rec = req_capsule_client_get(&open_req->rq_pill, &RMF_REC_REINT);
 739         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
 740         LASSERT(rec != NULL);
 741         /* Incoming message in my byte order (it's been swabbed). */
 742         /* Outgoing messages always in my byte order. */
 743         LASSERT(body != NULL);
 744
 745         /* Only if the import is replayable, we set replay_open data */
 746         if (och && imp->imp_replayable) {
 747                 mod = obd_mod_alloc();
 748                 if (mod == NULL) {
 749                         DEBUG_REQ(D_ERROR, open_req,
 750                                   "Can't allocate md_open_data");
 751                         RETURN(0);
 752                 }
 753
 754                 /**
 755                  * Take a reference on \var mod, to be freed on mdc_close().
 756                  * It protects \var mod from being freed on eviction (commit
 757                  * callback is called despite rq_replay flag).
 758                  * Another reference for \var och.
 759                  */
 760                 obd_mod_get(mod);
 761                 obd_mod_get(mod);
 762
 763                 spin_lock(&open_req->rq_lock);
 764                 och->och_mod = mod;
 765                 mod->mod_och = och;
 766                 mod->mod_open_req = open_req;
 767                 open_req->rq_cb_data = mod;
 768                 open_req->rq_commit_cb = mdc_commit_open;
 769                 spin_unlock(&open_req->rq_lock);
 770         }
 771
 772         rec->cr_fid2 = body->fid1;
 773         rec->cr_ioepoch = body->ioepoch;
 774         rec->cr_old_handle.cookie = body->handle.cookie;
 775         open_req->rq_replay_cb = mdc_replay_open;
 776         if (!fid_is_sane(&body->fid1)) {
 777                 DEBUG_REQ(D_ERROR, open_req, "Saving replay request with "
 778                           "insane fid");
 779                 LBUG();
 780         }
 781
 782         DEBUG_REQ(D_RPCTRACE, open_req, "Set up open replay data");
 783         RETURN(0);
 784 }
 785
 786 int mdc_clear_open_replay_data(struct obd_export *exp,
 787                                struct obd_client_handle *och)
 788 {
 789         struct md_open_data *mod = och->och_mod;
 790         ENTRY;
 791
 792         /**
 793          * It is possible to not have \var mod in a case of eviction between
 794          * lookup and ll_file_open().
 795          **/
 796         if (mod == NULL)
 797                 RETURN(0);
 798
 799         LASSERT(mod != LP_POISON);
 800
 801         mod->mod_och = NULL;
 802         och->och_mod = NULL;
 803         obd_mod_put(mod);
 804
 805         RETURN(0);
 806 }
 807
 808 /* Prepares the request for the replay by the given reply */
 809 static void mdc_close_handle_reply(struct ptlrpc_request *req,
 810                                    struct md_op_data *op_data, int rc) {
 811         struct mdt_body  *repbody;
 812         struct mdt_ioepoch *epoch;
 813
 814         if (req && rc == -EAGAIN) {
 815                 repbody = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 816                 epoch = req_capsule_client_get(&req->rq_pill, &RMF_MDT_EPOCH);
 817
 818                 epoch->flags |= MF_SOM_AU;
 819                 if (repbody->valid & OBD_MD_FLGETATTRLOCK)
 820                         op_data->op_flags |= MF_GETATTR_LOCK;
 821         }
 822 }
 823
 824 int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 825               struct md_open_data *mod, struct ptlrpc_request **request)
 826 {
 827         struct obd_device     *obd = class_exp2obd(exp);
 828         struct ptlrpc_request *req;
 829         int                    rc;
 830         ENTRY;
 831
 832         *request = NULL;
 833         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_CLOSE);
 834         if (req == NULL)
 835                 RETURN(-ENOMEM);
 836
 837         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 838
 839         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
 840         if (rc) {
 841                 ptlrpc_request_free(req);
 842                 RETURN(rc);
 843         }
 844
 845         /* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
 846          * portal whose threads are not taking any DLM locks and are therefore
 847          * always progressing */
 848         req->rq_request_portal = MDS_READPAGE_PORTAL;
 849         ptlrpc_at_set_req_timeout(req);
 850
 851         /* Ensure that this close's handle is fixed up during replay. */
 852         if (likely(mod != NULL)) {
 853                 LASSERTF(mod->mod_open_req != NULL &&
 854                          mod->mod_open_req->rq_type != LI_POISON,
 855                          "POISONED open %p!\n", mod->mod_open_req);
 856
 857                 mod->mod_close_req = req;
 858
 859                 DEBUG_REQ(D_HA, mod->mod_open_req, "matched open");
 860                 /* We no longer want to preserve this open for replay even
 861                  * though the open was committed. b=3632, b=3633 */
 862                 spin_lock(&mod->mod_open_req->rq_lock);
 863                 mod->mod_open_req->rq_replay = 0;
 864                 spin_unlock(&mod->mod_open_req->rq_lock);
 865         } else {
 866                  CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 867         }
 868
 869         mdc_close_pack(req, op_data);
 870
 871         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
 872                              obd->u.cli.cl_max_mds_easize);
 873         req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER,
 874                              obd->u.cli.cl_max_mds_cookiesize);
 875
 876         ptlrpc_request_set_replen(req);
 877
 878         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 879         rc = ptlrpc_queue_wait(req);
 880         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 881
 882         if (req->rq_repmsg == NULL) {
 883                 CDEBUG(D_RPCTRACE, "request failed to send: %p, %d\n", req,
 884                        req->rq_status);
 885                 if (rc == 0)
 886                         rc = req->rq_status ?: -EIO;
 887         } else if (rc == 0 || rc == -EAGAIN) {
 888                 struct mdt_body *body;
 889
 890                 rc = lustre_msg_get_status(req->rq_repmsg);
 891                 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
 892                         DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err "
 893                                   "= %d", rc);
 894                         if (rc > 0)
 895                                 rc = -rc;
 896                 }
 897                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 898                 if (body == NULL)
 899                         rc = -EPROTO;
 900         } else if (rc == -ESTALE) {
 901                 /**
 902                  * it can be allowed error after 3633 if open was committed and
 903                  * server failed before close was sent. Let's check if mod
 904                  * exists and return no error in that case
 905                  */
 906                 if (mod) {
 907                         DEBUG_REQ(D_HA, req, "Reset ESTALE = %d", rc);
 908                         LASSERT(mod->mod_open_req != NULL);
 909                         if (mod->mod_open_req->rq_committed)
 910                                 rc = 0;
 911                 }
 912         }
 913
 914         if (mod) {
 915                 if (rc != 0)
 916                         mod->mod_close_req = NULL;
 917                 /* Since now, mod is accessed through open_req only,
 918                  * thus close req does not keep a reference on mod anymore. */
 919                 obd_mod_put(mod);
 920         }
 921         *request = req;
 922         mdc_close_handle_reply(req, op_data, rc);
 923         RETURN(rc);
 924 }
 925
 926 int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 927                      struct md_open_data *mod)
 928 {
 929         struct obd_device     *obd = class_exp2obd(exp);
 930         struct ptlrpc_request *req;
 931         int                    rc;
 932         ENTRY;
 933
 934         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 935                                    &RQF_MDS_DONE_WRITING);
 936         if (req == NULL)
 937                 RETURN(-ENOMEM);
 938
 939         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 940         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_DONE_WRITING);
 941         if (rc) {
 942                 ptlrpc_request_free(req);
 943                 RETURN(rc);
 944         }
 945
 946         if (mod != NULL) {
 947                 LASSERTF(mod->mod_open_req != NULL &&
 948                          mod->mod_open_req->rq_type != LI_POISON,
 949                          "POISONED setattr %p!\n", mod->mod_open_req);
 950
 951                 mod->mod_close_req = req;
 952                 DEBUG_REQ(D_HA, mod->mod_open_req, "matched setattr");
 953                 /* We no longer want to preserve this setattr for replay even
 954                  * though the open was committed. b=3632, b=3633 */
 955                 spin_lock(&mod->mod_open_req->rq_lock);
 956                 mod->mod_open_req->rq_replay = 0;
 957                 spin_unlock(&mod->mod_open_req->rq_lock);
 958         }
 959
 960         mdc_close_pack(req, op_data);
 961         ptlrpc_request_set_replen(req);
 962
 963         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 964         rc = ptlrpc_queue_wait(req);
 965         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 966
 967         if (rc == -ESTALE) {
 968                 /**
 969                  * it can be allowed error after 3633 if open or setattr were
 970                  * committed and server failed before close was sent.
 971                  * Let's check if mod exists and return no error in that case
 972                  */
 973                 if (mod) {
 974                         LASSERT(mod->mod_open_req != NULL);
 975                         if (mod->mod_open_req->rq_committed)
 976                                 rc = 0;
 977                 }
 978         }
 979
 980         if (mod) {
 981                 if (rc != 0)
 982                         mod->mod_close_req = NULL;
 983                 /* Since now, mod is accessed through setattr req only,
 984                  * thus DW req does not keep a reference on mod anymore. */
 985                 obd_mod_put(mod);
 986         }
 987
 988         mdc_close_handle_reply(req, op_data, rc);
 989         ptlrpc_req_finished(req);
 990         RETURN(rc);
 991 }
 992
 993 #ifdef HAVE_SPLIT_SUPPORT
 994 int mdc_sendpage(struct obd_export *exp, const struct lu_fid *fid,
 995                  const struct page *page, int offset)
 996 {
 997         struct ptlrpc_request   *req;
 998         struct ptlrpc_bulk_desc *desc;
 999         int                      rc;
1000         ENTRY;
1001
1002         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_WRITEPAGE);
1003         if (req == NULL)
1004                 RETURN(-ENOMEM);
1005
1006         /* FIXME: capa doesn't support split yet */
1007         mdc_set_capa_size(req, &RMF_CAPA1, NULL);
1008
1009         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_WRITEPAGE);
1010         if (rc) {
1011                 ptlrpc_request_free(req);
1012                 RETURN(rc);
1013         }
1014
1015         req->rq_request_portal = MDS_READPAGE_PORTAL;
1016         ptlrpc_at_set_req_timeout(req);
1017
1018         desc = ptlrpc_prep_bulk_imp(req, 1, 1,BULK_GET_SOURCE, MDS_BULK_PORTAL);
1019         if (desc == NULL)
1020                 GOTO(out, rc = -ENOMEM);
1021
1022         /* NB req now owns desc and will free it when it gets freed. */
1023         ptlrpc_prep_bulk_page(desc, (struct page *)page, 0, offset);
1024         mdc_readdir_pack(req, 0, offset, fid, NULL);
1025
1026         ptlrpc_request_set_replen(req);
1027         rc = ptlrpc_queue_wait(req);
1028         if (rc)
1029                 GOTO(out, rc);
1030
1031         rc = sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk);
1032 out:
1033         ptlrpc_req_finished(req);
1034         return rc;
1035 }
1036 EXPORT_SYMBOL(mdc_sendpage);
1037 #endif
1038
1039 int mdc_readpage(struct obd_export *exp, struct md_op_data *op_data,
1040                  struct page **pages, struct ptlrpc_request **request)
1041 {
1042         struct ptlrpc_request   *req;
1043         struct ptlrpc_bulk_desc *desc;
1044         int                      i;
1045         cfs_waitq_t              waitq;
1046         int                      resends = 0;
1047         struct l_wait_info       lwi;
1048         int                      rc;
1049         ENTRY;
1050
1051         *request = NULL;
1052         cfs_waitq_init(&waitq);
1053
1054 restart_bulk:
1055         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
1056         if (req == NULL)
1057                 RETURN(-ENOMEM);
1058
1059         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
1060
1061         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
1062         if (rc) {
1063                 ptlrpc_request_free(req);
1064                 RETURN(rc);
1065         }
1066
1067         req->rq_request_portal = MDS_READPAGE_PORTAL;
1068         ptlrpc_at_set_req_timeout(req);
1069
1070         desc = ptlrpc_prep_bulk_imp(req, op_data->op_npages, 1, BULK_PUT_SINK,
1071                                     MDS_BULK_PORTAL);
1072         if (desc == NULL) {
1073                 ptlrpc_request_free(req);
1074                 RETURN(-ENOMEM);
1075         }
1076
1077         /* NB req now owns desc and will free it when it gets freed */
1078         for (i = 0; i < op_data->op_npages; i++)
1079                 ptlrpc_prep_bulk_page_pin(desc, pages[i], 0, PAGE_CACHE_SIZE);
1080
1081         mdc_readdir_pack(req, op_data->op_offset,
1082                          PAGE_CACHE_SIZE * op_data->op_npages,
1083                          &op_data->op_fid1, op_data->op_capa1);
1084
1085         ptlrpc_request_set_replen(req);
1086         rc = ptlrpc_queue_wait(req);
1087         if (rc) {
1088                 ptlrpc_req_finished(req);
1089                 if (rc != -ETIMEDOUT)
1090                         RETURN(rc);
1091
1092                 resends++;
1093                 if (!client_should_resend(resends, &exp->exp_obd->u.cli)) {
1094                         CERROR("too many resend retries, returning error\n");
1095                         RETURN(-EIO);
1096                 }
1097                 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL, NULL);
1098                 l_wait_event(waitq, 0, &lwi);
1099
1100                 goto restart_bulk;
1101         }
1102
1103         rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
1104                                           req->rq_bulk->bd_nob_transferred);
1105         if (rc < 0) {
1106                 ptlrpc_req_finished(req);
1107                 RETURN(rc);
1108         }
1109
1110         if (req->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK) {
1111                 CERROR("Unexpected # bytes transferred: %d (%ld expected)\n",
1112                         req->rq_bulk->bd_nob_transferred,
1113                         PAGE_CACHE_SIZE * op_data->op_npages);
1114                 ptlrpc_req_finished(req);
1115                 RETURN(-EPROTO);
1116         }
1117
1118         *request = req;
1119         RETURN(0);
1120 }
1121
1122 static int mdc_statfs(const struct lu_env *env,
1123                       struct obd_export *exp, struct obd_statfs *osfs,
1124                       __u64 max_age, __u32 flags)
1125 {
1126         struct obd_device     *obd = class_exp2obd(exp);
1127         struct ptlrpc_request *req;
1128         struct obd_statfs     *msfs;
1129         struct obd_import     *imp = NULL;
1130         int                    rc;
1131         ENTRY;
1132
1133         /*
1134          * Since the request might also come from lprocfs, so we need
1135          * sync this with client_disconnect_export Bug15684
1136          */
1137         down_read(&obd->u.cli.cl_sem);
1138         if (obd->u.cli.cl_import)
1139                 imp = class_import_get(obd->u.cli.cl_import);
1140         up_read(&obd->u.cli.cl_sem);
1141         if (!imp)
1142                 RETURN(-ENODEV);
1143
1144         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_STATFS,
1145                                         LUSTRE_MDS_VERSION, MDS_STATFS);
1146         if (req == NULL)
1147                 GOTO(output, rc = -ENOMEM);
1148
1149         ptlrpc_request_set_replen(req);
1150
1151         if (flags & OBD_STATFS_NODELAY) {
1152                 /* procfs requests not want stay in wait for avoid deadlock */
1153                 req->rq_no_resend = 1;
1154                 req->rq_no_delay = 1;
1155         }
1156
1157         rc = ptlrpc_queue_wait(req);
1158         if (rc) {
1159                 /* check connection error first */
1160                 if (imp->imp_connect_error)
1161                         rc = imp->imp_connect_error;
1162                 GOTO(out, rc);
1163         }
1164
1165         msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1166         if (msfs == NULL)
1167                 GOTO(out, rc = -EPROTO);
1168
1169         *osfs = *msfs;
1170         EXIT;
1171 out:
1172         ptlrpc_req_finished(req);
1173 output:
1174         class_import_put(imp);
1175         return rc;
1176 }
1177
1178 static int mdc_ioc_fid2path(struct obd_export *exp, struct getinfo_fid2path *gf)
1179 {
1180         __u32 keylen, vallen;
1181         void *key;
1182         int rc;
1183
1184         if (gf->gf_pathlen > PATH_MAX)
1185                 RETURN(-ENAMETOOLONG);
1186         if (gf->gf_pathlen < 2)
1187                 RETURN(-EOVERFLOW);
1188
1189         /* Key is KEY_FID2PATH + getinfo_fid2path description */
1190         keylen = cfs_size_round(sizeof(KEY_FID2PATH)) + sizeof(*gf);
1191         OBD_ALLOC(key, keylen);
1192         if (key == NULL)
1193                 RETURN(-ENOMEM);
1194         memcpy(key, KEY_FID2PATH, sizeof(KEY_FID2PATH));
1195         memcpy(key + cfs_size_round(sizeof(KEY_FID2PATH)), gf, sizeof(*gf));
1196
1197         CDEBUG(D_IOCTL, "path get "DFID" from "LPU64" #%d\n",
1198                PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno);
1199
1200         if (!fid_is_sane(&gf->gf_fid))
1201                 GOTO(out, rc = -EINVAL);
1202
1203         /* Val is struct getinfo_fid2path result plus path */
1204         vallen = sizeof(*gf) + gf->gf_pathlen;
1205
1206         rc = obd_get_info(NULL, exp, keylen, key, &vallen, gf, NULL);
1207         if (rc != 0 && rc != -EREMOTE)
1208                 GOTO(out, rc);
1209
1210         if (vallen <= sizeof(*gf))
1211                 GOTO(out, rc = -EPROTO);
1212         else if (vallen > sizeof(*gf) + gf->gf_pathlen)
1213                 GOTO(out, rc = -EOVERFLOW);
1214
1215         CDEBUG(D_IOCTL, "path get "DFID" from "LPU64" #%d\n%s\n",
1216                PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno, gf->gf_path);
1217
1218 out:
1219         OBD_FREE(key, keylen);
1220         return rc;
1221 }
1222
1223 static int mdc_ioc_hsm_progress(struct obd_export *exp,
1224                                 struct hsm_progress_kernel *hpk)
1225 {
1226         struct obd_import               *imp = class_exp2cliimp(exp);
1227         struct hsm_progress_kernel      *req_hpk;
1228         struct ptlrpc_request           *req;
1229         int                              rc;
1230         ENTRY;
1231
1232         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_PROGRESS,
1233                                         LUSTRE_MDS_VERSION, MDS_HSM_PROGRESS);
1234         if (req == NULL)
1235                 GOTO(out, rc = -ENOMEM);
1236
1237         mdc_pack_body(req, NULL, NULL, OBD_MD_FLRMTPERM, 0, 0, 0);
1238
1239         /* Copy hsm_progress struct */
1240         req_hpk = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_PROGRESS);
1241         if (req_hpk == NULL)
1242                 GOTO(out, rc = -EPROTO);
1243
1244         *req_hpk = *hpk;
1245         req_hpk->hpk_errval = lustre_errno_hton(hpk->hpk_errval);
1246
1247         ptlrpc_request_set_replen(req);
1248
1249         rc = mdc_queue_wait(req);
1250         GOTO(out, rc);
1251 out:
1252         ptlrpc_req_finished(req);
1253         return rc;
1254 }
1255
1256 static int mdc_ioc_hsm_ct_register(struct obd_import *imp, __u32 archives)
1257 {
1258         __u32                   *archive_mask;
1259         struct ptlrpc_request   *req;
1260         int                      rc;
1261         ENTRY;
1262
1263         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_REGISTER,
1264                                         LUSTRE_MDS_VERSION,
1265                                         MDS_HSM_CT_REGISTER);
1266         if (req == NULL)
1267                 GOTO(out, rc = -ENOMEM);
1268
1269         mdc_pack_body(req, NULL, NULL, OBD_MD_FLRMTPERM, 0, 0, 0);
1270
1271         /* Copy hsm_progress struct */
1272         archive_mask = req_capsule_client_get(&req->rq_pill,
1273                                               &RMF_MDS_HSM_ARCHIVE);
1274         if (archive_mask == NULL)
1275                 GOTO(out, rc = -EPROTO);
1276
1277         *archive_mask = archives;
1278
1279         ptlrpc_request_set_replen(req);
1280
1281         rc = mdc_queue_wait(req);
1282         GOTO(out, rc);
1283 out:
1284         ptlrpc_req_finished(req);
1285         return rc;
1286 }
1287
1288 static int mdc_ioc_hsm_current_action(struct obd_export *exp,
1289                                       struct md_op_data *op_data)
1290 {
1291         struct hsm_current_action       *hca = op_data->op_data;
1292         struct hsm_current_action       *req_hca;
1293         struct ptlrpc_request           *req;
1294         int                              rc;
1295         ENTRY;
1296
1297         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1298                                    &RQF_MDS_HSM_ACTION);
1299         if (req == NULL)
1300                 RETURN(-ENOMEM);
1301
1302         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
1303
1304         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_ACTION);
1305         if (rc) {
1306                 ptlrpc_request_free(req);
1307                 RETURN(rc);
1308         }
1309
1310         mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
1311                       OBD_MD_FLRMTPERM, 0, op_data->op_suppgids[0], 0);
1312
1313         ptlrpc_request_set_replen(req);
1314
1315         rc = mdc_queue_wait(req);
1316         if (rc)
1317                 GOTO(out, rc);
1318
1319         req_hca = req_capsule_server_get(&req->rq_pill,
1320                                          &RMF_MDS_HSM_CURRENT_ACTION);
1321         if (req_hca == NULL)
1322                 GOTO(out, rc = -EPROTO);
1323
1324         *hca = *req_hca;
1325
1326         EXIT;
1327 out:
1328         ptlrpc_req_finished(req);
1329         return rc;
1330 }
1331
1332 static int mdc_ioc_hsm_ct_unregister(struct obd_import *imp)
1333 {
1334         struct ptlrpc_request   *req;
1335         int                      rc;
1336         ENTRY;
1337
1338         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_UNREGISTER,
1339                                         LUSTRE_MDS_VERSION,
1340                                         MDS_HSM_CT_UNREGISTER);
1341         if (req == NULL)
1342                 GOTO(out, rc = -ENOMEM);
1343
1344         mdc_pack_body(req, NULL, NULL, OBD_MD_FLRMTPERM, 0, 0, 0);
1345
1346         ptlrpc_request_set_replen(req);
1347
1348         rc = mdc_queue_wait(req);
1349         GOTO(out, rc);
1350 out:
1351         ptlrpc_req_finished(req);
1352         return rc;
1353 }
1354
1355 static int mdc_ioc_hsm_state_get(struct obd_export *exp,
1356                                  struct md_op_data *op_data)
1357 {
1358         struct hsm_user_state   *hus = op_data->op_data;
1359         struct hsm_user_state   *req_hus;
1360         struct ptlrpc_request   *req;
1361         int                      rc;
1362         ENTRY;
1363
1364         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1365                                    &RQF_MDS_HSM_STATE_GET);
1366         if (req == NULL)
1367                 RETURN(-ENOMEM);
1368
1369         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
1370
1371         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_GET);
1372         if (rc != 0) {
1373                 ptlrpc_request_free(req);
1374                 RETURN(rc);
1375         }
1376
1377         mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
1378                       OBD_MD_FLRMTPERM, 0, op_data->op_suppgids[0], 0);
1379
1380         ptlrpc_request_set_replen(req);
1381
1382         rc = mdc_queue_wait(req);
1383         if (rc)
1384                 GOTO(out, rc);
1385
1386         req_hus = req_capsule_server_get(&req->rq_pill, &RMF_HSM_USER_STATE);
1387         if (req_hus == NULL)
1388                 GOTO(out, rc = -EPROTO);
1389
1390         *hus = *req_hus;
1391
1392         EXIT;
1393 out:
1394         ptlrpc_req_finished(req);
1395         return rc;
1396 }
1397
1398 static int mdc_ioc_hsm_state_set(struct obd_export *exp,
1399                                  struct md_op_data *op_data)
1400 {
1401         struct hsm_state_set    *hss = op_data->op_data;
1402         struct hsm_state_set    *req_hss;
1403         struct ptlrpc_request   *req;
1404         int                      rc;
1405         ENTRY;
1406
1407         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1408                                    &RQF_MDS_HSM_STATE_SET);
1409         if (req == NULL)
1410                 RETURN(-ENOMEM);
1411
1412         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
1413
1414         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_SET);
1415         if (rc) {
1416                 ptlrpc_request_free(req);
1417                 RETURN(rc);
1418         }
1419
1420         mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
1421                       OBD_MD_FLRMTPERM, 0, op_data->op_suppgids[0], 0);
1422
1423         /* Copy states */
1424         req_hss = req_capsule_client_get(&req->rq_pill, &RMF_HSM_STATE_SET);
1425         if (req_hss == NULL)
1426                 GOTO(out, rc = -EPROTO);
1427         *req_hss = *hss;
1428
1429         ptlrpc_request_set_replen(req);
1430
1431         rc = mdc_queue_wait(req);
1432         GOTO(out, rc);
1433
1434         EXIT;
1435 out:
1436         ptlrpc_req_finished(req);
1437         return rc;
1438 }
1439
1440 static int mdc_ioc_hsm_request(struct obd_export *exp,
1441                                struct hsm_user_request *hur)
1442 {
1443         struct obd_import       *imp = class_exp2cliimp(exp);
1444         struct ptlrpc_request   *req;
1445         struct hsm_request      *req_hr;
1446         struct hsm_user_item    *req_hui;
1447         char                    *req_opaque;
1448         int                      rc;
1449         ENTRY;
1450
1451         req = ptlrpc_request_alloc(imp, &RQF_MDS_HSM_REQUEST);
1452         if (req == NULL)
1453                 GOTO(out, rc = -ENOMEM);
1454
1455         req_capsule_set_size(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM, RCL_CLIENT,
1456                              hur->hur_request.hr_itemcount
1457                              * sizeof(struct hsm_user_item));
1458         req_capsule_set_size(&req->rq_pill, &RMF_GENERIC_DATA, RCL_CLIENT,
1459                              hur->hur_request.hr_data_len);
1460
1461         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_REQUEST);
1462         if (rc) {
1463                 ptlrpc_request_free(req);
1464                 RETURN(rc);
1465         }
1466
1467         mdc_pack_body(req, NULL, NULL, OBD_MD_FLRMTPERM, 0, 0, 0);
1468
1469         /* Copy hsm_request struct */
1470         req_hr = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_REQUEST);
1471         if (req_hr == NULL)
1472                 GOTO(out, rc = -EPROTO);
1473         *req_hr = hur->hur_request;
1474
1475         /* Copy hsm_user_item structs */
1476         req_hui = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM);
1477         if (req_hui == NULL)
1478                 GOTO(out, rc = -EPROTO);
1479         memcpy(req_hui, hur->hur_user_item,
1480                hur->hur_request.hr_itemcount * sizeof(struct hsm_user_item));
1481
1482         /* Copy opaque field */
1483         req_opaque = req_capsule_client_get(&req->rq_pill, &RMF_GENERIC_DATA);
1484         if (req_opaque == NULL)
1485                 GOTO(out, rc = -EPROTO);
1486         memcpy(req_opaque, hur_data(hur), hur->hur_request.hr_data_len);
1487
1488         ptlrpc_request_set_replen(req);
1489
1490         rc = mdc_queue_wait(req);
1491         GOTO(out, rc);
1492
1493 out:
1494         ptlrpc_req_finished(req);
1495         return rc;
1496 }
1497
1498 static struct kuc_hdr *changelog_kuc_hdr(char *buf, int len, int flags)
1499 {
1500         struct kuc_hdr *lh = (struct kuc_hdr *)buf;
1501
1502         LASSERT(len <= CR_MAXSIZE);
1503
1504         lh->kuc_magic = KUC_MAGIC;
1505         lh->kuc_transport = KUC_TRANSPORT_CHANGELOG;
1506         lh->kuc_flags = flags;
1507         lh->kuc_msgtype = CL_RECORD;
1508         lh->kuc_msglen = len;
1509         return lh;
1510 }
1511
1512 #define D_CHANGELOG 0
1513
1514 struct changelog_show {
1515         __u64           cs_startrec;
1516         __u32           cs_flags;
1517         struct file     *cs_fp;
1518         char            *cs_buf;
1519         struct obd_device *cs_obd;
1520 };
1521
1522 static int changelog_kkuc_cb(const struct lu_env *env, struct llog_handle *llh,
1523                              struct llog_rec_hdr *hdr, void *data)
1524 {
1525         struct changelog_show *cs = data;
1526         struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
1527         struct kuc_hdr *lh;
1528         int len, rc;
1529         ENTRY;
1530
1531         if (rec->cr_hdr.lrh_type != CHANGELOG_REC) {
1532                 rc = -EINVAL;
1533                 CERROR("%s: not a changelog rec %x/%d: rc = %d\n",
1534                        cs->cs_obd->obd_name, rec->cr_hdr.lrh_type,
1535                        rec->cr.cr_type, rc);
1536                 RETURN(rc);
1537         }
1538
1539         if (rec->cr.cr_index < cs->cs_startrec) {
1540                 /* Skip entries earlier than what we are interested in */
1541                 CDEBUG(D_CHANGELOG, "rec="LPU64" start="LPU64"\n",
1542                        rec->cr.cr_index, cs->cs_startrec);
1543                 RETURN(0);
1544         }
1545
1546         CDEBUG(D_CHANGELOG, LPU64" %02d%-5s "LPU64" 0x%x t="DFID" p="DFID
1547                 " %.*s\n", rec->cr.cr_index, rec->cr.cr_type,
1548                 changelog_type2str(rec->cr.cr_type), rec->cr.cr_time,
1549                 rec->cr.cr_flags & CLF_FLAGMASK,
1550                 PFID(&rec->cr.cr_tfid), PFID(&rec->cr.cr_pfid),
1551                 rec->cr.cr_namelen, changelog_rec_name(&rec->cr));
1552
1553         len = sizeof(*lh) + changelog_rec_size(&rec->cr) + rec->cr.cr_namelen;
1554
1555         /* Set up the message */
1556         lh = changelog_kuc_hdr(cs->cs_buf, len, cs->cs_flags);
1557         memcpy(lh + 1, &rec->cr, len - sizeof(*lh));
1558
1559         rc = libcfs_kkuc_msg_put(cs->cs_fp, lh);
1560         CDEBUG(D_CHANGELOG, "kucmsg fp %p len %d rc %d\n", cs->cs_fp, len,rc);
1561
1562         RETURN(rc);
1563 }
1564
1565 static int mdc_changelog_send_thread(void *csdata)
1566 {
1567         struct changelog_show *cs = csdata;
1568         struct llog_ctxt *ctxt = NULL;
1569         struct llog_handle *llh = NULL;
1570         struct kuc_hdr *kuch;
1571         int rc;
1572
1573         CDEBUG(D_CHANGELOG, "changelog to fp=%p start "LPU64"\n",
1574                cs->cs_fp, cs->cs_startrec);
1575
1576         OBD_ALLOC(cs->cs_buf, CR_MAXSIZE);
1577         if (cs->cs_buf == NULL)
1578                 GOTO(out, rc = -ENOMEM);
1579
1580         /* Set up the remote catalog handle */
1581         ctxt = llog_get_context(cs->cs_obd, LLOG_CHANGELOG_REPL_CTXT);
1582         if (ctxt == NULL)
1583                 GOTO(out, rc = -ENOENT);
1584         rc = llog_open(NULL, ctxt, &llh, NULL, CHANGELOG_CATALOG,
1585                        LLOG_OPEN_EXISTS);
1586         if (rc) {
1587                 CERROR("%s: fail to open changelog catalog: rc = %d\n",
1588                        cs->cs_obd->obd_name, rc);
1589                 GOTO(out, rc);
1590         }
1591         rc = llog_init_handle(NULL, llh, LLOG_F_IS_CAT, NULL);
1592         if (rc) {
1593                 CERROR("llog_init_handle failed %d\n", rc);
1594                 GOTO(out, rc);
1595         }
1596
1597         rc = llog_cat_process(NULL, llh, changelog_kkuc_cb, cs, 0, 0);
1598
1599         /* Send EOF no matter what our result */
1600         if ((kuch = changelog_kuc_hdr(cs->cs_buf, sizeof(*kuch),
1601                                       cs->cs_flags))) {
1602                 kuch->kuc_msgtype = CL_EOF;
1603                 libcfs_kkuc_msg_put(cs->cs_fp, kuch);
1604         }
1605
1606 out:
1607         fput(cs->cs_fp);
1608         if (llh)
1609                 llog_cat_close(NULL, llh);
1610         if (ctxt)
1611                 llog_ctxt_put(ctxt);
1612         if (cs->cs_buf)
1613                 OBD_FREE(cs->cs_buf, CR_MAXSIZE);
1614         OBD_FREE_PTR(cs);
1615         return rc;
1616 }
1617
1618 static int mdc_ioc_changelog_send(struct obd_device *obd,
1619                                   struct ioc_changelog *icc)
1620 {
1621         struct changelog_show *cs;
1622         int rc;
1623
1624         /* Freed in mdc_changelog_send_thread */
1625         OBD_ALLOC_PTR(cs);
1626         if (!cs)
1627                 return -ENOMEM;
1628
1629         cs->cs_obd = obd;
1630         cs->cs_startrec = icc->icc_recno;
1631         /* matching fput in mdc_changelog_send_thread */
1632         cs->cs_fp = fget(icc->icc_id);
1633         cs->cs_flags = icc->icc_flags;
1634
1635         /*
1636          * New thread because we should return to user app before
1637          * writing into our pipe
1638          */
1639         rc = PTR_ERR(kthread_run(mdc_changelog_send_thread, cs,
1640                                  "mdc_clg_send_thread"));
1641         if (!IS_ERR_VALUE(rc)) {
1642                 CDEBUG(D_CHANGELOG, "start changelog thread\n");
1643                 return 0;
1644         }
1645
1646         CERROR("Failed to start changelog thread: %d\n", rc);
1647         OBD_FREE_PTR(cs);
1648         return rc;
1649 }
1650
1651 static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
1652                                 struct lustre_kernelcomm *lk);
1653
1654 static int mdc_quotacheck(struct obd_device *unused, struct obd_export *exp,
1655                           struct obd_quotactl *oqctl)
1656 {
1657         struct client_obd       *cli = &exp->exp_obd->u.cli;
1658         struct ptlrpc_request   *req;
1659         struct obd_quotactl     *body;
1660         int                      rc;
1661         ENTRY;
1662
1663         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
1664                                         &RQF_MDS_QUOTACHECK, LUSTRE_MDS_VERSION,
1665                                         MDS_QUOTACHECK);
1666         if (req == NULL)
1667                 RETURN(-ENOMEM);
1668
1669         body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1670         *body = *oqctl;
1671
1672         ptlrpc_request_set_replen(req);
1673
1674         /* the next poll will find -ENODATA, that means quotacheck is
1675          * going on */
1676         cli->cl_qchk_stat = -ENODATA;
1677         rc = ptlrpc_queue_wait(req);
1678         if (rc)
1679                 cli->cl_qchk_stat = rc;
1680         ptlrpc_req_finished(req);
1681         RETURN(rc);
1682 }
1683
1684 static int mdc_quota_poll_check(struct obd_export *exp,
1685                                 struct if_quotacheck *qchk)
1686 {
1687         struct client_obd *cli = &exp->exp_obd->u.cli;
1688         int rc;
1689         ENTRY;
1690
1691         qchk->obd_uuid = cli->cl_target_uuid;
1692         memcpy(qchk->obd_type, LUSTRE_MDS_NAME, strlen(LUSTRE_MDS_NAME));
1693
1694         rc = cli->cl_qchk_stat;
1695         /* the client is not the previous one */
1696         if (rc == CL_NOT_QUOTACHECKED)
1697                 rc = -EINTR;
1698         RETURN(rc);
1699 }
1700
1701 static int mdc_quotactl(struct obd_device *unused, struct obd_export *exp,
1702                         struct obd_quotactl *oqctl)
1703 {
1704         struct ptlrpc_request   *req;
1705         struct obd_quotactl     *oqc;
1706         int                      rc;
1707         ENTRY;
1708
1709         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
1710                                         &RQF_MDS_QUOTACTL, LUSTRE_MDS_VERSION,
1711                                         MDS_QUOTACTL);
1712         if (req == NULL)
1713                 RETURN(-ENOMEM);
1714
1715         oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1716         *oqc = *oqctl;
1717
1718         ptlrpc_request_set_replen(req);
1719         ptlrpc_at_set_req_timeout(req);
1720         req->rq_no_resend = 1;
1721
1722         rc = ptlrpc_queue_wait(req);
1723         if (rc)
1724                 CERROR("ptlrpc_queue_wait failed, rc: %d\n", rc);
1725
1726         if (req->rq_repmsg &&
1727             (oqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL))) {
1728                 *oqctl = *oqc;
1729         } else if (!rc) {
1730                 CERROR ("Can't unpack obd_quotactl\n");
1731                 rc = -EPROTO;
1732         }
1733         ptlrpc_req_finished(req);
1734
1735         RETURN(rc);
1736 }
1737
1738 static int mdc_ioc_swap_layouts(struct obd_export *exp,
1739                                 struct md_op_data *op_data)
1740 {
1741         CFS_LIST_HEAD(cancels);
1742         struct ptlrpc_request   *req;
1743         int                      rc, count;
1744         struct mdc_swap_layouts *msl, *payload;
1745         ENTRY;
1746
1747         msl = op_data->op_data;
1748
1749         /* When the MDT will get the MDS_SWAP_LAYOUTS RPC the
1750          * first thing it will do is to cancel the 2 layout
1751          * locks hold by this client.
1752          * So the client must cancel its layout locks on the 2 fids
1753          * with the request RPC to avoid extra RPC round trips
1754          */
1755         count = mdc_resource_get_unused(exp, &op_data->op_fid1, &cancels,
1756                                         LCK_CR, MDS_INODELOCK_LAYOUT);
1757         count += mdc_resource_get_unused(exp, &op_data->op_fid2, &cancels,
1758                                          LCK_CR, MDS_INODELOCK_LAYOUT);
1759
1760         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1761                                    &RQF_MDS_SWAP_LAYOUTS);
1762         if (req == NULL) {
1763                 ldlm_lock_list_put(&cancels, l_bl_ast, count);
1764                 RETURN(-ENOMEM);
1765         }
1766
1767         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
1768         mdc_set_capa_size(req, &RMF_CAPA2, op_data->op_capa2);
1769
1770         rc = mdc_prep_elc_req(exp, req, MDS_SWAP_LAYOUTS, &cancels, count);
1771         if (rc) {
1772                 ptlrpc_request_free(req);
1773                 RETURN(rc);
1774         }
1775
1776         mdc_swap_layouts_pack(req, op_data);
1777
1778         payload = req_capsule_client_get(&req->rq_pill, &RMF_SWAP_LAYOUTS);
1779         LASSERT(payload);
1780
1781         *payload = *msl;
1782
1783         ptlrpc_request_set_replen(req);
1784
1785         rc = ptlrpc_queue_wait(req);
1786         if (rc)
1787                 GOTO(out, rc);
1788         EXIT;
1789
1790 out:
1791         ptlrpc_req_finished(req);
1792         return rc;
1793 }
1794
1795 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1796                          void *karg, void *uarg)
1797 {
1798         struct obd_device *obd = exp->exp_obd;
1799         struct obd_ioctl_data *data = karg;
1800         struct obd_import *imp = obd->u.cli.cl_import;
1801         struct llog_ctxt *ctxt;
1802         int rc;
1803         ENTRY;
1804
1805         if (!cfs_try_module_get(THIS_MODULE)) {
1806                 CERROR("Can't get module. Is it alive?");
1807                 return -EINVAL;
1808         }
1809         switch (cmd) {
1810         case OBD_IOC_CHANGELOG_SEND:
1811                 rc = mdc_ioc_changelog_send(obd, karg);
1812                 GOTO(out, rc);
1813         case OBD_IOC_CHANGELOG_CLEAR: {
1814                 struct ioc_changelog *icc = karg;
1815                 struct changelog_setinfo cs =
1816                         {.cs_recno = icc->icc_recno, .cs_id = icc->icc_id};
1817                 rc = obd_set_info_async(NULL, exp, strlen(KEY_CHANGELOG_CLEAR),
1818                                         KEY_CHANGELOG_CLEAR, sizeof(cs), &cs,
1819                                         NULL);
1820                 GOTO(out, rc);
1821         }
1822         case OBD_IOC_FID2PATH:
1823                 rc = mdc_ioc_fid2path(exp, karg);
1824                 GOTO(out, rc);
1825         case LL_IOC_HSM_CT_START:
1826                 rc = mdc_ioc_hsm_ct_start(exp, karg);
1827                 /* ignore if it was already registered on this MDS. */
1828                 if (rc == -EEXIST)
1829                         rc = 0;
1830                 GOTO(out, rc);
1831         case LL_IOC_HSM_PROGRESS:
1832                 rc = mdc_ioc_hsm_progress(exp, karg);
1833                 GOTO(out, rc);
1834         case LL_IOC_HSM_STATE_GET:
1835                 rc = mdc_ioc_hsm_state_get(exp, karg);
1836                 GOTO(out, rc);
1837         case LL_IOC_HSM_STATE_SET:
1838                 rc = mdc_ioc_hsm_state_set(exp, karg);
1839         case LL_IOC_HSM_ACTION:
1840                 rc = mdc_ioc_hsm_current_action(exp, karg);
1841                 GOTO(out, rc);
1842         case LL_IOC_HSM_REQUEST:
1843                 rc = mdc_ioc_hsm_request(exp, karg);
1844                 GOTO(out, rc);
1845         case OBD_IOC_CLIENT_RECOVER:
1846                 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1, 0);
1847                 if (rc < 0)
1848                         GOTO(out, rc);
1849                 GOTO(out, rc = 0);
1850         case IOC_OSC_SET_ACTIVE:
1851                 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
1852                 GOTO(out, rc);
1853         case OBD_IOC_PARSE: {
1854                 ctxt = llog_get_context(exp->exp_obd, LLOG_CONFIG_REPL_CTXT);
1855                 rc = class_config_parse_llog(NULL, ctxt, data->ioc_inlbuf1,
1856                                              NULL);
1857                 llog_ctxt_put(ctxt);
1858                 GOTO(out, rc);
1859         }
1860 #ifdef __KERNEL__
1861         case OBD_IOC_LLOG_INFO:
1862         case OBD_IOC_LLOG_PRINT: {
1863                 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
1864                 rc = llog_ioctl(NULL, ctxt, cmd, data);
1865                 llog_ctxt_put(ctxt);
1866                 GOTO(out, rc);
1867         }
1868 #endif
1869         case OBD_IOC_POLL_QUOTACHECK:
1870                 rc = mdc_quota_poll_check(exp, (struct if_quotacheck *)karg);
1871                 GOTO(out, rc);
1872         case OBD_IOC_PING_TARGET:
1873                 rc = ptlrpc_obd_ping(obd);
1874                 GOTO(out, rc);
1875         /*
1876          * Normally IOC_OBD_STATFS, OBD_IOC_QUOTACTL iocontrol are handled by
1877          * LMV instead of MDC. But when the cluster is upgraded from 1.8,
1878          * there'd be no LMV layer thus we might be called here. Eventually
1879          * this code should be removed.
1880          * bz20731, LU-592.
1881          */
1882         case IOC_OBD_STATFS: {
1883                 struct obd_statfs stat_buf = {0};
1884
1885                 if (*((__u32 *) data->ioc_inlbuf2) != 0)
1886                         GOTO(out, rc = -ENODEV);
1887
1888                 /* copy UUID */
1889                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(obd),
1890                                  min((int)data->ioc_plen2,
1891                                      (int)sizeof(struct obd_uuid))))
1892                         GOTO(out, rc = -EFAULT);
1893
1894                 rc = mdc_statfs(NULL, obd->obd_self_export, &stat_buf,
1895                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1896                                 0);
1897                 if (rc != 0)
1898                         GOTO(out, rc);
1899
1900                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1901                                      min((int) data->ioc_plen1,
1902                                          (int) sizeof(stat_buf))))
1903                         GOTO(out, rc = -EFAULT);
1904
1905                 GOTO(out, rc = 0);
1906         }
1907         case OBD_IOC_QUOTACTL: {
1908                 struct if_quotactl *qctl = karg;
1909                 struct obd_quotactl *oqctl;
1910
1911                 OBD_ALLOC_PTR(oqctl);
1912                 if (!oqctl)
1913                         RETURN(-ENOMEM);
1914
1915                 QCTL_COPY(oqctl, qctl);
1916                 rc = obd_quotactl(exp, oqctl);
1917                 if (rc == 0) {
1918                         QCTL_COPY(qctl, oqctl);
1919                         qctl->qc_valid = QC_MDTIDX;
1920                         qctl->obd_uuid = obd->u.cli.cl_target_uuid;
1921                 }
1922                 OBD_FREE_PTR(oqctl);
1923                 break;
1924         }
1925         case LL_IOC_GET_CONNECT_FLAGS: {
1926                 if (copy_to_user(uarg,
1927                                      exp_connect_flags_ptr(exp),
1928                                      sizeof(__u64)))
1929                         GOTO(out, rc = -EFAULT);
1930                 else
1931                         GOTO(out, rc = 0);
1932         }
1933         case LL_IOC_LOV_SWAP_LAYOUTS: {
1934                 rc = mdc_ioc_swap_layouts(exp, karg);
1935                 break;
1936         }
1937         default:
1938                 CERROR("mdc_ioctl(): unrecognised ioctl %#x\n", cmd);
1939                 GOTO(out, rc = -ENOTTY);
1940         }
1941 out:
1942         cfs_module_put(THIS_MODULE);
1943
1944         return rc;
1945 }
1946
1947 int mdc_get_info_rpc(struct obd_export *exp,
1948                      obd_count keylen, void *key,
1949                      int vallen, void *val)
1950 {
1951         struct obd_import      *imp = class_exp2cliimp(exp);
1952         struct ptlrpc_request  *req;
1953         char                   *tmp;
1954         int                     rc = -EINVAL;
1955         ENTRY;
1956
1957         req = ptlrpc_request_alloc(imp, &RQF_MDS_GET_INFO);
1958         if (req == NULL)
1959                 RETURN(-ENOMEM);
1960
1961         req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_KEY,
1962                              RCL_CLIENT, keylen);
1963         req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VALLEN,
1964                              RCL_CLIENT, sizeof(__u32));
1965
1966         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GET_INFO);
1967         if (rc) {
1968                 ptlrpc_request_free(req);
1969                 RETURN(rc);
1970         }
1971
1972         tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_KEY);
1973         memcpy(tmp, key, keylen);
1974         tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_VALLEN);
1975         memcpy(tmp, &vallen, sizeof(__u32));
1976
1977         req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VAL,
1978                              RCL_SERVER, vallen);
1979         ptlrpc_request_set_replen(req);
1980
1981         rc = ptlrpc_queue_wait(req);
1982         /* -EREMOTE means the get_info result is partial, and it needs to
1983          * continue on another MDT, see fid2path part in lmv_iocontrol */
1984         if (rc == 0 || rc == -EREMOTE) {
1985                 tmp = req_capsule_server_get(&req->rq_pill, &RMF_GETINFO_VAL);
1986                 memcpy(val, tmp, vallen);
1987                 if (ptlrpc_rep_need_swab(req)) {
1988                         if (KEY_IS(KEY_FID2PATH))
1989                                 lustre_swab_fid2path(val);
1990                 }
1991         }
1992         ptlrpc_req_finished(req);
1993
1994         RETURN(rc);
1995 }
1996
1997 static void lustre_swab_hai(struct hsm_action_item *h)
1998 {
1999         __swab32s(&h->hai_len);
2000         __swab32s(&h->hai_action);
2001         lustre_swab_lu_fid(&h->hai_fid);
2002         lustre_swab_lu_fid(&h->hai_dfid);
2003         __swab64s(&h->hai_cookie);
2004         __swab64s(&h->hai_extent.offset);
2005         __swab64s(&h->hai_extent.length);
2006         __swab64s(&h->hai_gid);
2007 }
2008
2009 static void lustre_swab_hal(struct hsm_action_list *h)
2010 {
2011         struct hsm_action_item  *hai;
2012         int                      i;
2013
2014         __swab32s(&h->hal_version);
2015         __swab32s(&h->hal_count);
2016         __swab32s(&h->hal_archive_id);
2017         __swab64s(&h->hal_flags);
2018         hai = hai_zero(h);
2019         for (i = 0; i < h->hal_count; i++) {
2020                 lustre_swab_hai(hai);
2021                 hai = hai_next(hai);
2022         }
2023 }
2024
2025 static void lustre_swab_kuch(struct kuc_hdr *l)
2026 {
2027         __swab16s(&l->kuc_magic);
2028         /* __u8 l->kuc_transport */
2029         __swab16s(&l->kuc_msgtype);
2030         __swab16s(&l->kuc_msglen);
2031 }
2032
2033 static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
2034                                 struct lustre_kernelcomm *lk)
2035 {
2036         struct obd_import  *imp = class_exp2cliimp(exp);
2037         __u32               archive = lk->lk_data;
2038         int                 rc = 0;
2039
2040         if (lk->lk_group != KUC_GRP_HSM) {
2041                 CERROR("Bad copytool group %d\n", lk->lk_group);
2042                 return -EINVAL;
2043         }
2044
2045         CDEBUG(D_HSM, "CT start r%d w%d u%d g%d f%#x\n", lk->lk_rfd, lk->lk_wfd,
2046                lk->lk_uid, lk->lk_group, lk->lk_flags);
2047
2048         if (lk->lk_flags & LK_FLG_STOP) {
2049                 /* Unregister with the coordinator */
2050                 rc = mdc_ioc_hsm_ct_unregister(imp);
2051         } else {
2052                 rc = mdc_ioc_hsm_ct_register(imp, archive);
2053         }
2054
2055         return rc;
2056 }
2057
2058 /**
2059  * Send a message to any listening copytools
2060  * @param val KUC message (kuc_hdr + hsm_action_list)
2061  * @param len total length of message
2062  */
2063 static int mdc_hsm_copytool_send(int len, void *val)
2064 {
2065         struct kuc_hdr          *lh = (struct kuc_hdr *)val;
2066         struct hsm_action_list  *hal = (struct hsm_action_list *)(lh + 1);
2067         int                      rc;
2068         ENTRY;
2069
2070         if (len < sizeof(*lh) + sizeof(*hal)) {
2071                 CERROR("Short HSM message %d < %d\n", len,
2072                        (int) (sizeof(*lh) + sizeof(*hal)));
2073                 RETURN(-EPROTO);
2074         }
2075         if (lh->kuc_magic == __swab16(KUC_MAGIC)) {
2076                 lustre_swab_kuch(lh);
2077                 lustre_swab_hal(hal);
2078         } else if (lh->kuc_magic != KUC_MAGIC) {
2079                 CERROR("Bad magic %x!=%x\n", lh->kuc_magic, KUC_MAGIC);
2080                 RETURN(-EPROTO);
2081         }
2082
2083         CDEBUG(D_HSM, " Received message mg=%x t=%d m=%d l=%d actions=%d "
2084                "on %s\n",
2085                lh->kuc_magic, lh->kuc_transport, lh->kuc_msgtype,
2086                lh->kuc_msglen, hal->hal_count, hal->hal_fsname);
2087
2088         /* Broadcast to HSM listeners */
2089         rc = libcfs_kkuc_group_put(KUC_GRP_HSM, lh);
2090
2091         RETURN(rc);
2092 }
2093
2094 /**
2095  * callback function passed to kuc for re-registering each HSM copytool
2096  * running on MDC, after MDT shutdown/recovery.
2097  * @param data archive id served by the copytool
2098  * @param cb_arg callback argument (obd_import)
2099  */
2100 static int mdc_hsm_ct_reregister(__u32 data, void *cb_arg)
2101 {
2102         struct obd_import       *imp = (struct obd_import *)cb_arg;
2103         __u32                    archive = data;
2104         int                      rc;
2105
2106         CDEBUG(D_HA, "recover copytool registration to MDT (archive=%#x)\n",
2107                archive);
2108         rc = mdc_ioc_hsm_ct_register(imp, archive);
2109
2110         /* ignore error if the copytool is already registered */
2111         return ((rc != 0) && (rc != -EEXIST)) ? rc : 0;
2112 }
2113
2114 /**
2115  * Re-establish all kuc contexts with MDT
2116  * after MDT shutdown/recovery.
2117  */
2118 static int mdc_kuc_reregister(struct obd_import *imp)
2119 {
2120         /* re-register HSM agents */
2121         return libcfs_kkuc_group_foreach(KUC_GRP_HSM, mdc_hsm_ct_reregister,
2122                                          (void *)imp);
2123 }
2124
2125 int mdc_set_info_async(const struct lu_env *env,
2126                        struct obd_export *exp,
2127                        obd_count keylen, void *key,
2128                        obd_count vallen, void *val,
2129                        struct ptlrpc_request_set *set)
2130 {
2131         struct obd_import       *imp = class_exp2cliimp(exp);
2132         int                      rc;
2133         ENTRY;
2134
2135         if (KEY_IS(KEY_READ_ONLY)) {
2136                 if (vallen != sizeof(int))
2137                         RETURN(-EINVAL);
2138
2139                 spin_lock(&imp->imp_lock);
2140                 if (*((int *)val)) {
2141                         imp->imp_connect_flags_orig |= OBD_CONNECT_RDONLY;
2142                         imp->imp_connect_data.ocd_connect_flags |=
2143                                                         OBD_CONNECT_RDONLY;
2144                 } else {
2145                         imp->imp_connect_flags_orig &= ~OBD_CONNECT_RDONLY;
2146                         imp->imp_connect_data.ocd_connect_flags &=
2147                                                         ~OBD_CONNECT_RDONLY;
2148                 }
2149                 spin_unlock(&imp->imp_lock);
2150
2151                 rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
2152                                        keylen, key, vallen, val, set);
2153                 RETURN(rc);
2154         }
2155         if (KEY_IS(KEY_SPTLRPC_CONF)) {
2156                 sptlrpc_conf_client_adapt(exp->exp_obd);
2157                 RETURN(0);
2158         }
2159         if (KEY_IS(KEY_FLUSH_CTX)) {
2160                 sptlrpc_import_flush_my_ctx(imp);
2161                 RETURN(0);
2162         }
2163         if (KEY_IS(KEY_MDS_CONN)) {
2164                 /* mds-mds import */
2165                 spin_lock(&imp->imp_lock);
2166                 imp->imp_server_timeout = 1;
2167                 spin_unlock(&imp->imp_lock);
2168                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
2169                 CDEBUG(D_OTHER, "%s: timeout / 2\n", exp->exp_obd->obd_name);
2170                 RETURN(0);
2171         }
2172         if (KEY_IS(KEY_CHANGELOG_CLEAR)) {
2173                 rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
2174                                        keylen, key, vallen, val, set);
2175                 RETURN(rc);
2176         }
2177         if (KEY_IS(KEY_HSM_COPYTOOL_SEND)) {
2178                 rc = mdc_hsm_copytool_send(vallen, val);
2179                 RETURN(rc);
2180         }
2181
2182         CERROR("Unknown key %s\n", (char *)key);
2183         RETURN(-EINVAL);
2184 }
2185
2186 int mdc_get_info(const struct lu_env *env, struct obd_export *exp,
2187                  __u32 keylen, void *key, __u32 *vallen, void *val,
2188                  struct lov_stripe_md *lsm)
2189 {
2190         int rc = -EINVAL;
2191
2192         if (KEY_IS(KEY_MAX_EASIZE)) {
2193                 int mdsize, *max_easize;
2194
2195                 if (*vallen != sizeof(int))
2196                         RETURN(-EINVAL);
2197                 mdsize = *(int*)val;
2198                 if (mdsize > exp->exp_obd->u.cli.cl_max_mds_easize)
2199                         exp->exp_obd->u.cli.cl_max_mds_easize = mdsize;
2200                 max_easize = val;
2201                 *max_easize = exp->exp_obd->u.cli.cl_max_mds_easize;
2202                 RETURN(0);
2203         } else if (KEY_IS(KEY_CONN_DATA)) {
2204                 struct obd_import *imp = class_exp2cliimp(exp);
2205                 struct obd_connect_data *data = val;
2206
2207                 if (*vallen != sizeof(*data))
2208                         RETURN(-EINVAL);
2209
2210                 *data = imp->imp_connect_data;
2211                 RETURN(0);
2212         } else if (KEY_IS(KEY_TGT_COUNT)) {
2213                 *((int *)val) = 1;
2214                 RETURN(0);
2215         }
2216
2217         rc = mdc_get_info_rpc(exp, keylen, key, *vallen, val);
2218
2219         RETURN(rc);
2220 }
2221
2222 static int mdc_pin(struct obd_export *exp, const struct lu_fid *fid,
2223                    struct obd_capa *oc, struct obd_client_handle *handle,
2224                    int flags)
2225 {
2226         struct ptlrpc_request *req;
2227         struct mdt_body       *body;
2228         int                    rc;
2229         ENTRY;
2230
2231         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_PIN);
2232         if (req == NULL)
2233                 RETURN(-ENOMEM);
2234
2235         mdc_set_capa_size(req, &RMF_CAPA1, oc);
2236
2237         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_PIN);
2238         if (rc) {
2239                 ptlrpc_request_free(req);
2240                 RETURN(rc);
2241         }
2242
2243         mdc_pack_body(req, fid, oc, 0, 0, -1, flags);
2244
2245         ptlrpc_request_set_replen(req);
2246
2247         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
2248         rc = ptlrpc_queue_wait(req);
2249         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
2250         if (rc) {
2251                 CERROR("Pin failed: %d\n", rc);
2252                 GOTO(err_out, rc);
2253         }
2254
2255         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2256         if (body == NULL)
2257                 GOTO(err_out, rc = -EPROTO);
2258
2259         handle->och_fh = body->handle;
2260         handle->och_magic = OBD_CLIENT_HANDLE_MAGIC;
2261
2262         handle->och_mod = obd_mod_alloc();
2263         if (handle->och_mod == NULL) {
2264                 DEBUG_REQ(D_ERROR, req, "can't allocate md_open_data");
2265                 GOTO(err_out, rc = -ENOMEM);
2266         }
2267         handle->och_mod->mod_open_req = req; /* will be dropped by unpin */
2268
2269         RETURN(0);
2270
2271 err_out:
2272         ptlrpc_req_finished(req);
2273         RETURN(rc);
2274 }
2275
2276 static int mdc_unpin(struct obd_export *exp, struct obd_client_handle *handle,
2277                      int flag)
2278 {
2279         struct ptlrpc_request *req;
2280         struct mdt_body       *body;
2281         int                    rc;
2282         ENTRY;
2283
2284         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_UNPIN,
2285                                         LUSTRE_MDS_VERSION, MDS_UNPIN);
2286         if (req == NULL)
2287                 RETURN(-ENOMEM);
2288
2289         body = req_capsule_client_get(&req->rq_pill, &RMF_MDT_BODY);
2290         body->handle = handle->och_fh;
2291         body->flags = flag;
2292
2293         ptlrpc_request_set_replen(req);
2294
2295         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
2296         rc = ptlrpc_queue_wait(req);
2297         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
2298
2299         if (rc != 0)
2300                 CERROR("Unpin failed: %d\n", rc);
2301
2302         ptlrpc_req_finished(req);
2303         ptlrpc_req_finished(handle->och_mod->mod_open_req);
2304
2305         obd_mod_put(handle->och_mod);
2306         RETURN(rc);
2307 }
2308
2309 int mdc_sync(struct obd_export *exp, const struct lu_fid *fid,
2310              struct obd_capa *oc, struct ptlrpc_request **request)
2311 {
2312         struct ptlrpc_request *req;
2313         int                    rc;
2314         ENTRY;
2315
2316         *request = NULL;
2317         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_SYNC);
2318         if (req == NULL)
2319                 RETURN(-ENOMEM);
2320
2321         mdc_set_capa_size(req, &RMF_CAPA1, oc);
2322
2323         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SYNC);
2324         if (rc) {
2325                 ptlrpc_request_free(req);
2326                 RETURN(rc);
2327         }
2328
2329         mdc_pack_body(req, fid, oc, 0, 0, -1, 0);
2330
2331         ptlrpc_request_set_replen(req);
2332
2333         rc = ptlrpc_queue_wait(req);
2334         if (rc)
2335                 ptlrpc_req_finished(req);
2336         else
2337                 *request = req;
2338         RETURN(rc);
2339 }
2340
2341 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
2342                             enum obd_import_event event)
2343 {
2344         int rc = 0;
2345
2346         LASSERT(imp->imp_obd == obd);
2347
2348         switch (event) {
2349         case IMP_EVENT_DISCON: {
2350 #if 0
2351                 /* XXX Pass event up to OBDs stack. used only for FLD now */
2352                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DISCON, NULL);
2353 #endif
2354                 break;
2355         }
2356         case IMP_EVENT_INACTIVE: {
2357                 struct client_obd *cli = &obd->u.cli;
2358                 /*
2359                  * Flush current sequence to make client obtain new one
2360                  * from server in case of disconnect/reconnect.
2361                  */
2362                 if (cli->cl_seq != NULL)
2363                         seq_client_flush(cli->cl_seq);
2364
2365                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
2366                 break;
2367         }
2368         case IMP_EVENT_INVALIDATE: {
2369                 struct ldlm_namespace *ns = obd->obd_namespace;
2370
2371                 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
2372
2373                 break;
2374         }
2375         case IMP_EVENT_ACTIVE:
2376                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
2377                 /* redo the kuc registration after reconnecting */
2378                 if (rc == 0)
2379                         rc = mdc_kuc_reregister(imp);
2380                 break;
2381         case IMP_EVENT_OCD:
2382                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
2383                 break;
2384         case IMP_EVENT_DEACTIVATE:
2385         case IMP_EVENT_ACTIVATE:
2386                 break;
2387         default:
2388                 CERROR("Unknown import event %x\n", event);
2389                 LBUG();
2390         }
2391         RETURN(rc);
2392 }
2393
2394 int mdc_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
2395                   struct md_op_data *op_data)
2396 {
2397         struct client_obd *cli = &exp->exp_obd->u.cli;
2398         struct lu_client_seq *seq = cli->cl_seq;
2399         ENTRY;
2400         RETURN(seq_client_alloc_fid(NULL, seq, fid));
2401 }
2402
2403 struct obd_uuid *mdc_get_uuid(struct obd_export *exp) {
2404         struct client_obd *cli = &exp->exp_obd->u.cli;
2405         return &cli->cl_target_uuid;
2406 }
2407
2408 /**
2409  * Determine whether the lock can be canceled before replaying it during
2410  * recovery, non zero value will be return if the lock can be canceled,
2411  * or zero returned for not
2412  */
2413 static int mdc_cancel_for_recovery(struct ldlm_lock *lock)
2414 {
2415         if (lock->l_resource->lr_type != LDLM_IBITS)
2416                 RETURN(0);
2417
2418         /* FIXME: if we ever get into a situation where there are too many
2419          * opened files with open locks on a single node, then we really
2420          * should replay these open locks to reget it */
2421         if (lock->l_policy_data.l_inodebits.bits & MDS_INODELOCK_OPEN)
2422                 RETURN(0);
2423
2424         RETURN(1);
2425 }
2426
2427 static int mdc_resource_inode_free(struct ldlm_resource *res)
2428 {
2429         if (res->lr_lvb_inode)
2430                 res->lr_lvb_inode = NULL;
2431
2432         return 0;
2433 }
2434
2435 struct ldlm_valblock_ops inode_lvbo = {
2436         lvbo_free: mdc_resource_inode_free
2437 };
2438
2439 static int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
2440 {
2441         struct client_obd *cli = &obd->u.cli;
2442         struct lprocfs_static_vars lvars = { 0 };
2443         int rc;
2444         ENTRY;
2445
2446         OBD_ALLOC(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
2447         if (!cli->cl_rpc_lock)
2448                 RETURN(-ENOMEM);
2449         mdc_init_rpc_lock(cli->cl_rpc_lock);
2450
2451         ptlrpcd_addref();
2452
2453         OBD_ALLOC(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
2454         if (!cli->cl_close_lock)
2455                 GOTO(err_rpc_lock, rc = -ENOMEM);
2456         mdc_init_rpc_lock(cli->cl_close_lock);
2457
2458         rc = client_obd_setup(obd, cfg);
2459         if (rc)
2460                 GOTO(err_close_lock, rc);
2461         lprocfs_mdc_init_vars(&lvars);
2462         lprocfs_obd_setup(obd, lvars.obd_vars);
2463         sptlrpc_lprocfs_cliobd_attach(obd);
2464         ptlrpc_lprocfs_register_obd(obd);
2465
2466         ns_register_cancel(obd->obd_namespace, mdc_cancel_for_recovery);
2467
2468         obd->obd_namespace->ns_lvbo = &inode_lvbo;
2469
2470         rc = obd_llog_init(obd, &obd->obd_olg, obd, NULL);
2471         if (rc) {
2472                 mdc_cleanup(obd);
2473                 CERROR("failed to setup llogging subsystems\n");
2474         }
2475
2476         RETURN(rc);
2477
2478 err_close_lock:
2479         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
2480 err_rpc_lock:
2481         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
2482         ptlrpcd_decref();
2483         RETURN(rc);
2484 }
2485
2486 /* Initialize the default and maximum LOV EA and cookie sizes.  This allows
2487  * us to make MDS RPCs with large enough reply buffers to hold the
2488  * maximum-sized (= maximum striped) EA and cookie without having to
2489  * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
2490 static int mdc_init_ea_size(struct obd_export *exp, int easize,
2491                      int def_easize, int cookiesize)
2492 {
2493         struct obd_device *obd = exp->exp_obd;
2494         struct client_obd *cli = &obd->u.cli;
2495         ENTRY;
2496
2497         if (cli->cl_max_mds_easize < easize)
2498                 cli->cl_max_mds_easize = easize;
2499
2500         if (cli->cl_default_mds_easize < def_easize)
2501                 cli->cl_default_mds_easize = def_easize;
2502
2503         if (cli->cl_max_mds_cookiesize < cookiesize)
2504                 cli->cl_max_mds_cookiesize = cookiesize;
2505
2506         RETURN(0);
2507 }
2508
2509 static int mdc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2510 {
2511         int rc = 0;
2512         ENTRY;
2513
2514         switch (stage) {
2515         case OBD_CLEANUP_EARLY:
2516                 break;
2517         case OBD_CLEANUP_EXPORTS:
2518                 /* Failsafe, ok if racy */
2519                 if (obd->obd_type->typ_refcnt <= 1)
2520                         libcfs_kkuc_group_rem(0, KUC_GRP_HSM);
2521
2522                 obd_cleanup_client_import(obd);
2523                 ptlrpc_lprocfs_unregister_obd(obd);
2524                 lprocfs_obd_cleanup(obd);
2525
2526                 rc = obd_llog_finish(obd, 0);
2527                 if (rc != 0)
2528                         CERROR("failed to cleanup llogging subsystems\n");
2529                 break;
2530         }
2531         RETURN(rc);
2532 }
2533
2534 static int mdc_cleanup(struct obd_device *obd)
2535 {
2536         struct client_obd *cli = &obd->u.cli;
2537
2538         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
2539         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
2540
2541         ptlrpcd_decref();
2542
2543         return client_obd_cleanup(obd);
2544 }
2545
2546
2547 static int mdc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
2548                          struct obd_device *tgt, int *index)
2549 {
2550         struct llog_ctxt        *ctxt;
2551         int                      rc;
2552
2553         ENTRY;
2554
2555         LASSERT(olg == &obd->obd_olg);
2556
2557         rc = llog_setup(NULL, obd, olg, LLOG_CHANGELOG_REPL_CTXT, tgt,
2558                         &llog_client_ops);
2559         if (rc)
2560                 RETURN(rc);
2561
2562         ctxt = llog_group_get_ctxt(olg, LLOG_CHANGELOG_REPL_CTXT);
2563         llog_initiator_connect(ctxt);
2564         llog_ctxt_put(ctxt);
2565
2566         RETURN(0);
2567 }
2568
2569 static int mdc_llog_finish(struct obd_device *obd, int count)
2570 {
2571         struct llog_ctxt *ctxt;
2572
2573         ENTRY;
2574
2575         ctxt = llog_get_context(obd, LLOG_CHANGELOG_REPL_CTXT);
2576         if (ctxt)
2577                 llog_cleanup(NULL, ctxt);
2578
2579         RETURN(0);
2580 }
2581
2582 static int mdc_process_config(struct obd_device *obd, obd_count len, void *buf)
2583 {
2584         struct lustre_cfg *lcfg = buf;
2585         struct lprocfs_static_vars lvars = { 0 };
2586         int rc = 0;
2587
2588         lprocfs_mdc_init_vars(&lvars);
2589         switch (lcfg->lcfg_command) {
2590         default:
2591                 rc = class_process_proc_param(PARAM_MDC, lvars.obd_vars,
2592                                               lcfg, obd);
2593                 if (rc > 0)
2594                         rc = 0;
2595                 break;
2596         }
2597         return(rc);
2598 }
2599
2600
2601 /* get remote permission for current user on fid */
2602 int mdc_get_remote_perm(struct obd_export *exp, const struct lu_fid *fid,
2603                         struct obd_capa *oc, __u32 suppgid,
2604                         struct ptlrpc_request **request)
2605 {
2606         struct ptlrpc_request  *req;
2607         int                    rc;
2608         ENTRY;
2609
2610         LASSERT(client_is_remote(exp));
2611
2612         *request = NULL;
2613         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
2614         if (req == NULL)
2615                 RETURN(-ENOMEM);
2616
2617         mdc_set_capa_size(req, &RMF_CAPA1, oc);
2618
2619         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
2620         if (rc) {
2621                 ptlrpc_request_free(req);
2622                 RETURN(rc);
2623         }
2624
2625         mdc_pack_body(req, fid, oc, OBD_MD_FLRMTPERM, 0, suppgid, 0);
2626
2627         req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
2628                              sizeof(struct mdt_remote_perm));
2629
2630         ptlrpc_request_set_replen(req);
2631
2632         rc = ptlrpc_queue_wait(req);
2633         if (rc)
2634                 ptlrpc_req_finished(req);
2635         else
2636                 *request = req;
2637         RETURN(rc);
2638 }
2639
2640 static int mdc_interpret_renew_capa(const struct lu_env *env,
2641                                     struct ptlrpc_request *req, void *args,
2642                                     int status)
2643 {
2644         struct mdc_renew_capa_args *ra = args;
2645         struct mdt_body *body = NULL;
2646         struct lustre_capa *capa;
2647         ENTRY;
2648
2649         if (status)
2650                 GOTO(out, capa = ERR_PTR(status));
2651
2652         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2653         if (body == NULL)
2654                 GOTO(out, capa = ERR_PTR(-EFAULT));
2655
2656         if ((body->valid & OBD_MD_FLOSSCAPA) == 0)
2657                 GOTO(out, capa = ERR_PTR(-ENOENT));
2658
2659         capa = req_capsule_server_get(&req->rq_pill, &RMF_CAPA2);
2660         if (!capa)
2661                 GOTO(out, capa = ERR_PTR(-EFAULT));
2662         EXIT;
2663 out:
2664         ra->ra_cb(ra->ra_oc, capa);
2665         return 0;
2666 }
2667
2668 static int mdc_renew_capa(struct obd_export *exp, struct obd_capa *oc,
2669                           renew_capa_cb_t cb)
2670 {
2671         struct ptlrpc_request *req;
2672         struct mdc_renew_capa_args *ra;
2673         ENTRY;
2674
2675         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_GETATTR,
2676                                         LUSTRE_MDS_VERSION, MDS_GETATTR);
2677         if (req == NULL)
2678                 RETURN(-ENOMEM);
2679
2680         /* NB, OBD_MD_FLOSSCAPA is set here, but it doesn't necessarily mean the
2681          * capa to renew is oss capa.
2682          */
2683         mdc_pack_body(req, &oc->c_capa.lc_fid, oc, OBD_MD_FLOSSCAPA, 0, -1, 0);
2684         ptlrpc_request_set_replen(req);
2685
2686         CLASSERT(sizeof(*ra) <= sizeof(req->rq_async_args));
2687         ra = ptlrpc_req_async_args(req);
2688         ra->ra_oc = oc;
2689         ra->ra_cb = cb;
2690         req->rq_interpret_reply = mdc_interpret_renew_capa;
2691         ptlrpcd_add_req(req, PDL_POLICY_LOCAL, -1);
2692         RETURN(0);
2693 }
2694
2695 static int mdc_connect(const struct lu_env *env,
2696                        struct obd_export **exp,
2697                        struct obd_device *obd, struct obd_uuid *cluuid,
2698                        struct obd_connect_data *data,
2699                        void *localdata)
2700 {
2701         struct obd_import *imp = obd->u.cli.cl_import;
2702
2703         /* mds-mds import features */
2704         if (data && (data->ocd_connect_flags & OBD_CONNECT_MDS_MDS)) {
2705                 spin_lock(&imp->imp_lock);
2706                 imp->imp_server_timeout = 1;
2707                 spin_unlock(&imp->imp_lock);
2708                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
2709                 CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n",
2710                        obd->obd_name);
2711         }
2712
2713         return client_connect_import(env, exp, obd, cluuid, data, NULL);
2714 }
2715
2716 struct obd_ops mdc_obd_ops = {
2717         .o_owner            = THIS_MODULE,
2718         .o_setup            = mdc_setup,
2719         .o_precleanup       = mdc_precleanup,
2720         .o_cleanup          = mdc_cleanup,
2721         .o_add_conn         = client_import_add_conn,
2722         .o_del_conn         = client_import_del_conn,
2723         .o_connect          = mdc_connect,
2724         .o_disconnect       = client_disconnect_export,
2725         .o_iocontrol        = mdc_iocontrol,
2726         .o_set_info_async   = mdc_set_info_async,
2727         .o_statfs           = mdc_statfs,
2728         .o_pin              = mdc_pin,
2729         .o_unpin            = mdc_unpin,
2730         .o_fid_init         = client_fid_init,
2731         .o_fid_fini         = client_fid_fini,
2732         .o_fid_alloc        = mdc_fid_alloc,
2733         .o_import_event     = mdc_import_event,
2734         .o_llog_init        = mdc_llog_init,
2735         .o_llog_finish      = mdc_llog_finish,
2736         .o_get_info         = mdc_get_info,
2737         .o_process_config   = mdc_process_config,
2738         .o_get_uuid         = mdc_get_uuid,
2739         .o_quotactl         = mdc_quotactl,
2740         .o_quotacheck       = mdc_quotacheck
2741 };
2742
2743 struct md_ops mdc_md_ops = {
2744         .m_getstatus        = mdc_getstatus,
2745         .m_null_inode       = mdc_null_inode,
2746         .m_find_cbdata      = mdc_find_cbdata,
2747         .m_close            = mdc_close,
2748         .m_create           = mdc_create,
2749         .m_done_writing     = mdc_done_writing,
2750         .m_enqueue          = mdc_enqueue,
2751         .m_getattr          = mdc_getattr,
2752         .m_getattr_name     = mdc_getattr_name,
2753         .m_intent_lock      = mdc_intent_lock,
2754         .m_link             = mdc_link,
2755         .m_is_subdir        = mdc_is_subdir,
2756         .m_rename           = mdc_rename,
2757         .m_setattr          = mdc_setattr,
2758         .m_setxattr         = mdc_setxattr,
2759         .m_getxattr         = mdc_getxattr,
2760         .m_sync             = mdc_sync,
2761         .m_readpage         = mdc_readpage,
2762         .m_unlink           = mdc_unlink,
2763         .m_cancel_unused    = mdc_cancel_unused,
2764         .m_init_ea_size     = mdc_init_ea_size,
2765         .m_set_lock_data    = mdc_set_lock_data,
2766         .m_lock_match       = mdc_lock_match,
2767         .m_get_lustre_md    = mdc_get_lustre_md,
2768         .m_free_lustre_md   = mdc_free_lustre_md,
2769         .m_set_open_replay_data = mdc_set_open_replay_data,
2770         .m_clear_open_replay_data = mdc_clear_open_replay_data,
2771         .m_renew_capa       = mdc_renew_capa,
2772         .m_unpack_capa      = mdc_unpack_capa,
2773         .m_get_remote_perm  = mdc_get_remote_perm,
2774         .m_intent_getattr_async = mdc_intent_getattr_async,
2775         .m_revalidate_lock      = mdc_revalidate_lock
2776 };
2777
2778 int __init mdc_init(void)
2779 {
2780         int rc;
2781         struct lprocfs_static_vars lvars = { 0 };
2782         lprocfs_mdc_init_vars(&lvars);
2783
2784         rc = class_register_type(&mdc_obd_ops, &mdc_md_ops, lvars.module_vars,
2785                                  LUSTRE_MDC_NAME, NULL);
2786         RETURN(rc);
2787 }
2788
2789 #ifdef __KERNEL__
2790 static void /*__exit*/ mdc_exit(void)
2791 {
2792         class_unregister_type(LUSTRE_MDC_NAME);
2793 }
2794
2795 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2796 MODULE_DESCRIPTION("Lustre Metadata Client");
2797 MODULE_LICENSE("GPL");
2798
2799 module_init(mdc_init);
2800 module_exit(mdc_exit);
2801 #endif