lustre/mdc/mdc_request.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 2001-2004 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.sf.net/projects/lustre/
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #ifndef EXPORT_SYMTAB
  23 # define EXPORT_SYMTAB
  24 #endif
  25 #define DEBUG_SUBSYSTEM S_MDC
  26
  27 #ifdef __KERNEL__
  28 # include <linux/module.h>
  29 # include <linux/pagemap.h>
  30 # include <linux/miscdevice.h>
  31 # include <linux/init.h>
  32 #else
  33 # include <liblustre.h>
  34 #endif
  35
  36 #include <linux/obd_class.h>
  37 #include <linux/lustre_mds.h>
  38 #include <linux/lustre_dlm.h>
  39 #include <linux/lustre_sec.h>
  40 #include <linux/lprocfs_status.h>
  41 #include <linux/lustre_acl.h>
  42 #include "mdc_internal.h"
  43
  44 #define REQUEST_MINOR 244
  45
  46 static int mdc_cleanup(struct obd_device *obd, int flags);
  47
  48 extern int mds_queue_req(struct ptlrpc_request *);
  49 /* Helper that implements most of mdc_getstatus and signal_completed_replay. */
  50 /* XXX this should become mdc_get_info("key"), sending MDS_GET_INFO RPC */
  51 static int send_getstatus(struct obd_import *imp, struct lustre_id *rootid,
  52                           int level, int msg_flags)
  53 {
  54         struct ptlrpc_request *req;
  55         struct mds_body *body;
  56         int rc, size[2] = {0, sizeof(*body)};
  57         ENTRY;
  58
  59         //size[0] = lustre_secdesc_size();
  60
  61         req = ptlrpc_prep_req(imp, LUSTRE_MDS_VERSION, MDS_GETSTATUS,
  62                               2, size, NULL);
  63         if (!req)
  64                 GOTO(out, rc = -ENOMEM);
  65
  66         //lustre_pack_secdesc(req, size[0]);
  67
  68         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF, sizeof (*body));
  69         req->rq_send_state = level;
  70         req->rq_replen = lustre_msg_size(1, &size[1]);
  71
  72         req->rq_reqmsg->flags |= msg_flags;
  73         rc = ptlrpc_queue_wait(req);
  74
  75         if (!rc) {
  76                 body = lustre_swab_repbuf (req, 0, sizeof (*body),
  77                                            lustre_swab_mds_body);
  78                 if (body == NULL) {
  79                         CERROR ("Can't extract mds_body\n");
  80                         GOTO (out, rc = -EPROTO);
  81                 }
  82
  83                 memcpy(rootid, &body->id1, sizeof(*rootid));
  84
  85                 CDEBUG(D_NET, "root ino="LPU64", last_committed="LPU64
  86                        ", last_xid="LPU64"\n", rootid->li_stc.u.e3s.l3s_ino,
  87                        req->rq_repmsg->last_committed, req->rq_repmsg->last_xid);
  88         }
  89
  90         EXIT;
  91  out:
  92         ptlrpc_req_finished(req);
  93         return rc;
  94 }
  95
  96 /* This should be mdc_get_info("rootid") */
  97 int mdc_getstatus(struct obd_export *exp, struct lustre_id *rootid)
  98 {
  99         return send_getstatus(class_exp2cliimp(exp), rootid,
 100                               LUSTRE_IMP_FULL, 0);
 101 }
 102
 103 int mdc_getattr_common(struct obd_export *exp, unsigned int ea_size,
 104                        struct ptlrpc_request *req)
 105 {
 106         struct mds_body *body, *reqbody;
 107         void            *eadata;
 108         int              rc;
 109         int              repsize[4] = {sizeof(*body)};
 110         int              bufcount = 1;
 111         ENTRY;
 112
 113         /* request message already built */
 114
 115         if (ea_size != 0) {
 116                 repsize[bufcount++] = ea_size;
 117                 CDEBUG(D_INODE, "reserved %u bytes for MD/symlink in packet\n",
 118                        ea_size);
 119         }
 120
 121         reqbody = lustre_msg_buf(req->rq_reqmsg, 1, sizeof(*reqbody));
 122
 123         if (reqbody->valid & OBD_MD_FLACL_ACCESS) {
 124                 repsize[bufcount++] = 4;
 125                 repsize[bufcount++] = xattr_acl_size(LL_ACL_MAX_ENTRIES);
 126         }
 127
 128         req->rq_replen = lustre_msg_size(bufcount, repsize);
 129
 130         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 131         rc = ptlrpc_queue_wait(req);
 132         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 133         if (rc != 0)
 134                 RETURN (rc);
 135
 136         body = lustre_swab_repbuf (req, 0, sizeof (*body),
 137                                    lustre_swab_mds_body);
 138         if (body == NULL) {
 139                 CERROR ("Can't unpack mds_body\n");
 140                 RETURN (-EPROTO);
 141         }
 142
 143         CDEBUG(D_NET, "mode: %o\n", body->mode);
 144
 145         LASSERT_REPSWAB (req, 1);
 146
 147         /* Skip the check if getxattr/listxattr are called with no buffers */
 148         if ((reqbody->valid & (OBD_MD_FLEA | OBD_MD_FLEALIST)) &&
 149             (reqbody->eadatasize != 0)){
 150                 if (body->eadatasize != 0) {
 151                 /* reply indicates presence of eadata; check it's there... */
 152                         eadata = lustre_msg_buf (req->rq_repmsg, 1,
 153                                                  body->eadatasize);
 154                         if (eadata == NULL) {
 155                                 CERROR ("Missing/short eadata\n");
 156                                 RETURN (-EPROTO);
 157                         }
 158                  }
 159          }
 160
 161         RETURN (0);
 162 }
 163
 164 static int mdc_cancel_unused(struct obd_export *exp,
 165                              struct lov_stripe_md *lsm,
 166                              int flags, void *opaque)
 167 {
 168         struct obd_device *obd = class_exp2obd(exp);
 169
 170         ENTRY;
 171         RETURN(ldlm_cli_cancel_unused(obd->obd_namespace,
 172                                       NULL, flags, opaque));
 173 }
 174
 175 int mdc_getattr(struct obd_export *exp, struct lustre_id *id,
 176                 __u64 valid, const char *ea_name, int ea_namelen,
 177                 unsigned int ea_size, struct ptlrpc_request **request)
 178 {
 179         struct ptlrpc_request *req;
 180         struct mds_body *body;
 181         int bufcount = 2;
 182         int size[3] = {0, sizeof(*body)};
 183         int rc;
 184         ENTRY;
 185
 186         /* XXX do we need to make another request here?  We just did a getattr
 187          *     to do the lookup in the first place.
 188          */
 189         size[0] = lustre_secdesc_size();
 190
 191         LASSERT((ea_name != NULL) == (ea_namelen != 0));
 192         if (valid & (OBD_MD_FLEA | OBD_MD_FLEALIST)) {
 193                 size[bufcount] = ea_namelen;
 194                 bufcount++;
 195         }
 196
 197         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 198                               MDS_GETATTR, bufcount, size, NULL);
 199         if (!req)
 200                 GOTO(out, rc = -ENOMEM);
 201
 202         lustre_pack_secdesc(req, size[0]);
 203
 204         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF, sizeof (*body));
 205         memcpy(&body->id1, id, sizeof(*id));
 206         body->valid = valid;
 207         body->eadatasize = ea_size;
 208
 209
 210         if (valid & OBD_MD_FLEA) {
 211                 LASSERT(strnlen(ea_name, ea_namelen) == (ea_namelen - 1));
 212                 memcpy(lustre_msg_buf(req->rq_reqmsg, 2, ea_namelen),
 213                        ea_name, ea_namelen);
 214         }
 215
 216         rc = mdc_getattr_common(exp, ea_size, req);
 217         if (rc != 0) {
 218                 ptlrpc_req_finished (req);
 219                 req = NULL;
 220         }
 221  out:
 222         *request = req;
 223         RETURN (rc);
 224 }
 225
 226 int mdc_getattr_lock(struct obd_export *exp, struct lustre_id *id,
 227                      char *filename, int namelen, __u64 valid,
 228                      unsigned int ea_size, struct ptlrpc_request **request)
 229 {
 230         struct ptlrpc_request *req;
 231         struct mds_body *body;
 232         int rc, size[3] = {0, sizeof(*body), namelen};
 233         ENTRY;
 234
 235         size[0] = lustre_secdesc_size();
 236
 237         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 238                               MDS_GETATTR_LOCK, 3, size, NULL);
 239         if (!req)
 240                 GOTO(out, rc = -ENOMEM);
 241
 242         lustre_pack_secdesc(req, size[0]);
 243
 244         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF, sizeof (*body));
 245         memcpy(&body->id1, id, sizeof(*id));
 246         body->valid = valid;
 247         body->eadatasize = ea_size;
 248
 249         if (filename != NULL) {
 250                 LASSERT (strnlen (filename, namelen) == namelen - 1);
 251                 memcpy(lustre_msg_buf(req->rq_reqmsg, 2, namelen),
 252                        filename, namelen);
 253         } else {
 254                 LASSERT(namelen == 1);
 255         }
 256
 257         rc = mdc_getattr_common(exp, ea_size, req);
 258         if (rc != 0) {
 259                 ptlrpc_req_finished (req);
 260                 req = NULL;
 261         }
 262  out:
 263         *request = req;
 264         RETURN(rc);
 265 }
 266
 267 /* This should be called with both the request and the reply still packed. */
 268 int mdc_store_inode_generation(struct obd_export *exp,
 269                                struct ptlrpc_request *req,
 270                                int reqoff, int repoff)
 271 {
 272         struct mds_rec_create *rec =
 273                 lustre_msg_buf(req->rq_reqmsg, reqoff, sizeof(*rec));
 274         struct mds_body *body =
 275                 lustre_msg_buf(req->rq_repmsg, repoff, sizeof(*body));
 276
 277         LASSERT (rec != NULL);
 278         LASSERT (body != NULL);
 279
 280         memcpy(&rec->cr_replayid, &body->id1, sizeof(rec->cr_replayid));
 281         DEBUG_REQ(D_HA, req, "storing generation for ino "DLID4,
 282                   OLID4(&rec->cr_replayid));
 283         return 0;
 284 }
 285
 286 int mdc_req2lustre_md(struct obd_export *exp_lmv, struct ptlrpc_request *req,
 287                       unsigned int offset, struct obd_export *exp_lov,
 288                       struct lustre_md *md)
 289 {
 290         void *buf;
 291         int rc = 0;
 292         int size, acl_off;
 293         struct posix_acl *acl;
 294         struct lov_mds_md *lmm;
 295         ENTRY;
 296
 297         LASSERT(md != NULL);
 298         memset(md, 0, sizeof(*md));
 299
 300         md->body = lustre_msg_buf(req->rq_repmsg, offset,
 301                                   sizeof(*md->body));
 302         if (!md->body)
 303                 RETURN(-ENOMEM);
 304
 305         LASSERT_REPSWABBED(req, offset);
 306
 307         if (!(md->body->valid & OBD_MD_FLEASIZE) &&
 308             !(md->body->valid & OBD_MD_FLDIREA))
 309                 RETURN(0);
 310
 311         if (S_ISREG(md->body->mode)) {
 312                 if (md->body->eadatasize == 0) {
 313                         CERROR("invalid EA size (0) is detected\n");
 314                         RETURN(-EPROTO);
 315                 }
 316
 317                 lmm = lustre_msg_buf(req->rq_repmsg, offset + 1,
 318                                      md->body->eadatasize);
 319                 if (!lmm)
 320                         RETURN(-EINVAL);
 321
 322                 LASSERT(exp_lov != NULL);
 323
 324                 rc = obd_unpackmd(exp_lov, &md->lsm, lmm,
 325                                   md->body->eadatasize);
 326                 if (rc > 0) {
 327                         LASSERT(rc >= sizeof(*md->lsm));
 328                         rc = 0;
 329                 }
 330         } else if (S_ISDIR(md->body->mode)) {
 331                 /* dir can be non-splitted */
 332                 if (md->body->eadatasize == 0)
 333                         RETURN(0);
 334
 335                 lmm = lustre_msg_buf(req->rq_repmsg, offset + 1,
 336                                      md->body->eadatasize);
 337                 if (!lmm)
 338                         RETURN(-EINVAL);
 339
 340                 if (md->body->valid & OBD_MD_MEA) {
 341                         LASSERT(exp_lmv != NULL);
 342
 343                         rc = obd_unpackmd(exp_lmv, (void *)&md->mea,
 344                                           lmm, md->body->eadatasize);
 345                         if (rc > 0) {
 346                                 LASSERT(rc >= sizeof(*md->mea));
 347                                 rc = 0;
 348                         }
 349                 }
 350         } else {
 351                 LASSERT(S_ISCHR(md->body->mode) ||
 352                         S_ISBLK(md->body->mode) ||
 353                         S_ISFIFO(md->body->mode)||
 354                         S_ISLNK(md->body->mode) ||
 355                         S_ISSOCK(md->body->mode));
 356         }
 357
 358         acl_off = (md->body->valid & OBD_MD_FLEASIZE) ? (offset + 2) :
 359                   (offset + 1);
 360
 361         if (md->body->valid & OBD_MD_FLACL_ACCESS) {
 362                 size = le32_to_cpu(*(__u32 *) lustre_msg_buf(req->rq_repmsg,
 363                                    acl_off, 4));
 364                 buf = lustre_msg_buf(req->rq_repmsg, acl_off + 1, size);
 365
 366                 acl = posix_acl_from_xattr(buf, size);
 367                 if (IS_ERR(acl)) {
 368                         rc = PTR_ERR(acl);
 369                         CERROR("convert xattr to acl failed: %d\n", rc);
 370                         RETURN(rc);
 371                 } else if (acl) {
 372                         rc = posix_acl_valid(acl);
 373                         if (rc) {
 374                                 CERROR("acl valid error: %d\n", rc);
 375                                 posix_acl_release(acl);
 376                                 RETURN(rc);
 377                         }
 378                 }
 379
 380                 md->acl_access = acl;
 381         }
 382         RETURN(rc);
 383 }
 384
 385 static void mdc_commit_open(struct ptlrpc_request *req)
 386 {
 387         struct mdc_open_data *mod = req->rq_cb_data;
 388         if (mod == NULL)
 389                 return;
 390
 391         if (mod->mod_close_req != NULL)
 392                 mod->mod_close_req->rq_cb_data = NULL;
 393
 394         if (mod->mod_och != NULL)
 395                 mod->mod_och->och_mod = NULL;
 396
 397         OBD_FREE(mod, sizeof(*mod));
 398         req->rq_cb_data = NULL;
 399         LASSERT(atomic_read(&req->rq_refcount) > 1);
 400         ptlrpc_req_finished(req);
 401 }
 402
 403 static void mdc_replay_open(struct ptlrpc_request *req)
 404 {
 405         struct mdc_open_data *mod = req->rq_cb_data;
 406         struct obd_client_handle *och;
 407         struct ptlrpc_request *close_req;
 408         struct lustre_handle old;
 409         struct mds_body *body;
 410         ENTRY;
 411
 412         body = lustre_swab_repbuf(req, 1, sizeof(*body), lustre_swab_mds_body);
 413         LASSERT (body != NULL);
 414
 415         if (mod == NULL) {
 416                 DEBUG_REQ(D_ERROR, req,
 417                           "can't properly replay without open data");
 418                 EXIT;
 419                 return;
 420         }
 421
 422         och = mod->mod_och;
 423         if (och != NULL) {
 424                 struct lustre_handle *file_fh;
 425                 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
 426                 file_fh = &och->och_fh;
 427                 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
 428                        file_fh->cookie, body->handle.cookie);
 429                 memcpy(&old, file_fh, sizeof(old));
 430                 memcpy(file_fh, &body->handle, sizeof(*file_fh));
 431         }
 432
 433         close_req = mod->mod_close_req;
 434         if (close_req != NULL) {
 435                 struct mds_body *close_body;
 436                 LASSERT(close_req->rq_reqmsg->opc == MDS_CLOSE);
 437                 close_body = lustre_msg_buf(close_req->rq_reqmsg,
 438                                             MDS_REQ_REC_OFF,
 439                                             sizeof(*close_body));
 440                 if (och != NULL)
 441                         LASSERT(!memcmp(&old, &close_body->handle, sizeof old));
 442                 DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
 443                 memcpy(&close_body->handle, &body->handle,
 444                        sizeof(close_body->handle));
 445         }
 446
 447         EXIT;
 448 }
 449
 450 int mdc_set_open_replay_data(struct obd_export *exp,
 451                              struct obd_client_handle *och,
 452                              struct ptlrpc_request *open_req)
 453 {
 454         struct mdc_open_data *mod;
 455         struct mds_rec_create *rec;
 456         struct mds_body *body;
 457
 458         rec = lustre_msg_buf(open_req->rq_reqmsg, MDS_REQ_INTENT_REC_OFF,
 459                              sizeof(*rec));
 460         body = lustre_msg_buf(open_req->rq_repmsg, 1, sizeof(*body));
 461
 462         LASSERT(rec != NULL);
 463         /* outgoing messages always in my byte order */
 464         LASSERT(body != NULL);
 465         /* incoming message in my byte order (it's been swabbed) */
 466         LASSERT_REPSWABBED(open_req, 1);
 467
 468         OBD_ALLOC(mod, sizeof(*mod));
 469         if (mod == NULL) {
 470                 DEBUG_REQ(D_ERROR, open_req, "can't allocate mdc_open_data");
 471                 return 0;
 472         }
 473
 474         och->och_mod = mod;
 475         mod->mod_och = och;
 476         mod->mod_open_req = ptlrpc_request_addref(open_req);
 477
 478         memcpy(&rec->cr_replayid, &body->id1, sizeof rec->cr_replayid);
 479         open_req->rq_replay_cb = mdc_replay_open;
 480         open_req->rq_commit_cb = mdc_commit_open;
 481         open_req->rq_cb_data = mod;
 482         DEBUG_REQ(D_HA, open_req, "set up replay data");
 483         return 0;
 484 }
 485
 486 int mdc_clear_open_replay_data(struct obd_export *exp,
 487                                struct obd_client_handle *och)
 488 {
 489         struct mdc_open_data *mod = och->och_mod;
 490
 491         /* Don't free the structure now (it happens in mdc_commit_open, after
 492          * we're sure we won't need to fix up the close request in the future),
 493          * but make sure that replay doesn't poke at the och, which is about to
 494          * be freed. */
 495         LASSERT(mod != LP_POISON);
 496         if (mod != NULL)
 497                 mod->mod_och = NULL;
 498         och->och_mod = NULL;
 499         return 0;
 500 }
 501
 502 static void mdc_commit_close(struct ptlrpc_request *req)
 503 {
 504         struct mdc_open_data *mod = req->rq_cb_data;
 505         struct ptlrpc_request *open_req;
 506         struct obd_import *imp = req->rq_import;
 507
 508         DEBUG_REQ(D_HA, req, "close req committed");
 509         if (mod == NULL)
 510                 return;
 511
 512         mod->mod_close_req = NULL;
 513         req->rq_cb_data = NULL;
 514         req->rq_commit_cb = NULL;
 515
 516         open_req = mod->mod_open_req;
 517         LASSERT(open_req != NULL);
 518         LASSERT(open_req != LP_POISON);
 519         LASSERT(open_req->rq_type != LI_POISON);
 520
 521         DEBUG_REQ(D_HA, open_req, "open req balanced");
 522         if (open_req->rq_transno == 0) {
 523                 DEBUG_REQ(D_ERROR, open_req, "BUG 3892  open");
 524                 DEBUG_REQ(D_ERROR, req, "BUG 3892 close");
 525                 LASSERTF(open_req->rq_transno != 0, "BUG 3892");
 526         }
 527         LASSERT(open_req->rq_import == imp);
 528
 529         /* We no longer want to preserve this for transno-unconditional
 530          * replay. */
 531         spin_lock(&open_req->rq_lock);
 532         open_req->rq_replay = 0;
 533         spin_unlock(&open_req->rq_lock);
 534 }
 535
 536 int mdc_close(struct obd_export *exp, struct obdo *oa,
 537               struct obd_client_handle *och,
 538               struct ptlrpc_request **request)
 539 {
 540         struct obd_device *obd = class_exp2obd(exp);
 541         struct obd_import *imp = class_exp2cliimp(exp);
 542         int reqsize[3] = {0, sizeof(struct mds_body),
 543                           obd->u.cli.cl_max_mds_cookiesize};
 544         int rc, repsize[3] = {sizeof(struct mds_body),
 545                               obd->u.cli.cl_max_mds_easize,
 546                               obd->u.cli.cl_max_mds_cookiesize};
 547         struct ptlrpc_request *req;
 548         struct mdc_open_data *mod;
 549         ENTRY;
 550
 551         if (imp->imp_connection == NULL) {
 552                 CERROR("request on not connected import %s\n",
 553                         imp->imp_obd->obd_name);
 554                 RETURN(-EIO);
 555         }
 556
 557         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 558                               MDS_CLOSE, 3, reqsize, NULL);
 559         if (req == NULL)
 560                 GOTO(out, rc = -ENOMEM);
 561
 562         //reqsize[0] = lustre_secdesc_size();
 563         //lustre_pack_secdesc(req, reqsize[0]);
 564
 565         /* Ensure that this close's handle is fixed up during replay. */
 566         LASSERT(och != NULL);
 567         mod = och->och_mod;
 568         if (likely(mod != NULL)) {
 569                 mod->mod_close_req = req;
 570                 LASSERT(mod->mod_open_req->rq_type != LI_POISON);
 571                 DEBUG_REQ(D_HA, mod->mod_open_req, "matched open");
 572         } else {
 573                 CDEBUG(D_HA, "couldn't find open req; "
 574                        "expecting close error\n");
 575         }
 576
 577         mdc_close_pack(req, 1, oa, oa->o_valid, och);
 578
 579         req->rq_replen = lustre_msg_size(3, repsize);
 580         req->rq_commit_cb = mdc_commit_close;
 581         LASSERT(req->rq_cb_data == NULL);
 582         req->rq_cb_data = mod;
 583
 584         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 585         rc = ptlrpc_queue_wait(req);
 586         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 587
 588         if (req->rq_repmsg == NULL) {
 589                 CDEBUG(D_HA, "request failed to send: %p, %d\n", req,
 590                        req->rq_status);
 591                 if (rc == 0)
 592                         rc = req->rq_status ? req->rq_status : -EIO;
 593         } else if (rc == 0) {
 594                 rc = req->rq_repmsg->status;
 595                 if (req->rq_repmsg->type == PTL_RPC_MSG_ERR) {
 596                         DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, "
 597                                   "err = %d", rc);
 598                         if (rc > 0)
 599                                 rc = -rc;
 600                 } else {
 601                         if (mod == NULL)
 602                                 CERROR("Unexpected: can't find mdc_open_data, but "
 603                                        "close succeeded. Please tell CFS.\n");
 604                         if (!lustre_swab_repbuf(req, 0, sizeof(struct mds_body),
 605                                                 lustre_swab_mds_body))
 606                         {
 607                                 CERROR("Error unpacking mds_body\n");
 608                                 rc = -EPROTO;
 609                         }
 610                 }
 611         }
 612
 613         EXIT;
 614  out:
 615         *request = req;
 616         return rc;
 617 }
 618
 619 int mdc_done_writing(struct obd_export *exp, struct obdo *obdo)
 620 {
 621         struct ptlrpc_request *req;
 622         struct mds_body *body;
 623         int rc, size[2] = {0, sizeof(*body)};
 624         ENTRY;
 625
 626         size[0] = lustre_secdesc_size();
 627
 628         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 629                               MDS_DONE_WRITING, 2, size, NULL);
 630         if (req == NULL)
 631                 RETURN(-ENOMEM);
 632
 633         lustre_pack_secdesc(req, size[0]);
 634
 635         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF,
 636                               sizeof(*body));
 637
 638         mdc_pack_id(&body->id1, obdo->o_id, 0, obdo->o_mode,
 639                     obdo->o_mds, obdo->o_fid);
 640
 641         body->size = obdo->o_size;
 642         body->blocks = obdo->o_blocks;
 643         body->flags = obdo->o_flags;
 644         body->valid = obdo->o_valid;
 645
 646         req->rq_replen = lustre_msg_size(1, &size[1]);
 647
 648         rc = ptlrpc_queue_wait(req);
 649         ptlrpc_req_finished(req);
 650         RETURN(rc);
 651 }
 652
 653 int mdc_readpage(struct obd_export *exp,
 654                  struct lustre_id *id,
 655                  __u64 offset, struct page *page,
 656                  struct ptlrpc_request **request)
 657 {
 658         struct obd_import *imp = class_exp2cliimp(exp);
 659         struct ptlrpc_request *req = NULL;
 660         struct ptlrpc_bulk_desc *desc = NULL;
 661         struct mds_body *body;
 662         int rc, size[2] = {0, sizeof(*body)};
 663         ENTRY;
 664
 665         CDEBUG(D_INODE, "inode: %ld\n", (long)id->li_stc.u.e3s.l3s_ino);
 666
 667         size[0] = lustre_secdesc_size();
 668
 669         req = ptlrpc_prep_req(imp, LUSTRE_MDS_VERSION, MDS_READPAGE,
 670                               2, size, NULL);
 671         if (req == NULL)
 672                 GOTO(out, rc = -ENOMEM);
 673         /* XXX FIXME bug 249 */
 674         req->rq_request_portal = MDS_READPAGE_PORTAL;
 675
 676         lustre_pack_secdesc(req, size[0]);
 677
 678         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_PUT_SINK, MDS_BULK_PORTAL);
 679         if (desc == NULL)
 680                 GOTO(out, rc = -ENOMEM);
 681         /* NB req now owns desc and will free it when it gets freed */
 682
 683         ptlrpc_prep_bulk_page(desc, page, 0, PAGE_CACHE_SIZE);
 684         mdc_readdir_pack(req, 1, offset, PAGE_CACHE_SIZE, id);
 685
 686         req->rq_replen = lustre_msg_size(1, &size[1]);
 687         rc = ptlrpc_queue_wait(req);
 688
 689         if (rc == 0) {
 690                 body = lustre_swab_repbuf(req, 0, sizeof (*body),
 691                                           lustre_swab_mds_body);
 692                 if (body == NULL) {
 693                         CERROR("Can't unpack mds_body\n");
 694                         GOTO(out, rc = -EPROTO);
 695                 }
 696
 697                 if (req->rq_bulk->bd_nob_transferred != PAGE_CACHE_SIZE) {
 698                         CERROR ("Unexpected # bytes transferred: %d"
 699                                 " (%ld expected)\n",
 700                                 req->rq_bulk->bd_nob_transferred,
 701                                 PAGE_CACHE_SIZE);
 702                         GOTO (out, rc = -EPROTO);
 703                 }
 704         }
 705
 706         EXIT;
 707  out:
 708         *request = req;
 709         return rc;
 710 }
 711
 712 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 713                          void *karg, void *uarg)
 714 {
 715         struct obd_device *obd = exp->exp_obd;
 716         struct obd_ioctl_data *data = karg;
 717         struct obd_import *imp = obd->u.cli.cl_import;
 718         struct llog_ctxt *ctxt;
 719         int rc;
 720         ENTRY;
 721
 722 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 723         MOD_INC_USE_COUNT;
 724 #else
 725         if (!try_module_get(THIS_MODULE)) {
 726                 CERROR("Can't get module. Is it alive?");
 727                 return -EINVAL;
 728         }
 729 #endif
 730         switch (cmd) {
 731         case OBD_IOC_CLIENT_RECOVER:
 732                 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1);
 733                 if (rc < 0)
 734                         GOTO(out, rc);
 735                 GOTO(out, rc = 0);
 736         case IOC_OSC_SET_ACTIVE:
 737                 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
 738                 GOTO(out, rc);
 739         case IOC_OSC_CTL_RECOVERY:
 740                 rc = ptlrpc_import_control_recovery(imp, data->ioc_offset);
 741                 GOTO(out, rc);
 742         case OBD_IOC_PARSE: {
 743                 ctxt = llog_get_context(&exp->exp_obd->obd_llogs,
 744                                         LLOG_CONFIG_REPL_CTXT);
 745                 rc = class_config_process_llog(ctxt, data->ioc_inlbuf1, NULL);
 746                 GOTO(out, rc);
 747         }
 748 #ifdef __KERNEL__
 749         case OBD_IOC_LLOG_INFO:
 750         case OBD_IOC_LLOG_PRINT: {
 751                 ctxt = llog_get_context(&obd->obd_llogs, LLOG_CONFIG_REPL_CTXT);
 752                 rc = llog_ioctl(ctxt, cmd, data);
 753
 754                 GOTO(out, rc);
 755         }
 756 #endif
 757         default:
 758                 CERROR("mdc_ioctl(): unrecognised ioctl %#x\n", cmd);
 759                 GOTO(out, rc = -ENOTTY);
 760         }
 761 out:
 762 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 763         MOD_DEC_USE_COUNT;
 764 #else
 765         module_put(THIS_MODULE);
 766 #endif
 767
 768         return rc;
 769 }
 770
 771 int mdc_set_info(struct obd_export *exp, obd_count keylen,
 772                  void *key, obd_count vallen, void *val)
 773 {
 774         int rc = -EINVAL;
 775
 776         if (keylen == strlen("initial_recov") &&
 777             memcmp(key, "initial_recov", strlen("initial_recov")) == 0) {
 778                 struct obd_import *imp = exp->exp_obd->u.cli.cl_import;
 779                 if (vallen != sizeof(int))
 780                         RETURN(-EINVAL);
 781                 imp->imp_initial_recov = *(int *)val;
 782                 CDEBUG(D_HA, "%s: set imp_no_init_recov = %d\n",
 783                        exp->exp_obd->obd_name,
 784                        imp->imp_initial_recov);
 785                 RETURN(0);
 786         } else if (keylen >= strlen("mds_type") &&
 787                    strcmp(key, "mds_type") == 0) {
 788                 struct ptlrpc_request *req;
 789                 char *bufs[2] = {key, val};
 790                 int rc, size[2] = {keylen, vallen};
 791
 792                 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
 793                                       OST_SET_INFO, 2, size, bufs);
 794                 if (req == NULL)
 795                         RETURN(-ENOMEM);
 796
 797                 req->rq_replen = lustre_msg_size(0, NULL);
 798                 rc = ptlrpc_queue_wait(req);
 799                 ptlrpc_req_finished(req);
 800                 RETURN(rc);
 801         } else if (keylen >= strlen("inter_mds") && strcmp(key, "inter_mds") == 0) {
 802                 struct obd_import *imp = class_exp2cliimp(exp);
 803                 imp->imp_server_timeout = 1;
 804                 CDEBUG(D_OTHER, "%s: timeout / 2\n", exp->exp_obd->obd_name);
 805                 RETURN(0);
 806         } else if (keylen == strlen("sec") &&
 807                    memcmp(key, "sec", keylen) == 0) {
 808                 struct client_obd *cli = &exp->exp_obd->u.cli;
 809
 810                 cli->cl_sec_flavor = ptlrpcs_name2flavor(val);
 811                 if (cli->cl_sec_flavor == PTLRPCS_FLVR_INVALID) {
 812                         CERROR("unrecognized security type %s\n", (char*) val);
 813                         RETURN(-EINVAL);
 814                 }
 815
 816                 RETURN(0);
 817         } else if (keylen == strlen("sec_flags") &&
 818                    memcmp(key, "sec_flags", keylen) == 0) {
 819                 struct client_obd *cli = &exp->exp_obd->u.cli;
 820
 821                 cli->cl_sec_flags = *((unsigned long *) val);
 822                 RETURN(0);
 823         } else if (keylen == strlen("flush_cred") &&
 824                    memcmp(key, "flush_cred", keylen) == 0) {
 825                 struct client_obd *cli = &exp->exp_obd->u.cli;
 826
 827                 if (cli->cl_import)
 828                         ptlrpcs_import_flush_creds(cli->cl_import,
 829                                                    *((uid_t *) val));
 830                 RETURN(0);
 831         } else if (keylen == strlen("async") && memcmp(key, "async", keylen) == 0) {
 832                 struct client_obd *cl = &exp->exp_obd->u.cli;
 833                 if (vallen != sizeof(int))
 834                         RETURN(-EINVAL);
 835                 cl->cl_async = *(int *)val;
 836                 CDEBUG(D_HA, "%s: set async = %d\n",
 837                        exp->exp_obd->obd_name, cl->cl_async);
 838                 RETURN(0);
 839         }
 840         RETURN(rc);
 841 }
 842
 843 static int mdc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
 844                       unsigned long max_age)
 845 {
 846         struct obd_statfs *msfs;
 847         struct ptlrpc_request *req;
 848         int rc, size = sizeof(*msfs);
 849         ENTRY;
 850
 851         /* We could possibly pass max_age in the request (as an absolute
 852          * timestamp or a "seconds.usec ago") so the target can avoid doing
 853          * extra calls into the filesystem if that isn't necessary (e.g.
 854          * during mount that would help a bit).  Having relative timestamps
 855          * is not so great if request processing is slow, while absolute
 856          * timestamps are not ideal because they need time synchronization. */
 857         req = ptlrpc_prep_req(obd->u.cli.cl_import, LUSTRE_MDS_VERSION,
 858                               MDS_STATFS, 0, NULL, NULL);
 859         if (!req)
 860                 RETURN(-ENOMEM);
 861
 862         req->rq_replen = lustre_msg_size(1, &size);
 863
 864         mdc_get_rpc_lock(obd->u.cli.cl_rpc_lock, NULL);
 865         rc = ptlrpc_queue_wait(req);
 866         mdc_put_rpc_lock(obd->u.cli.cl_rpc_lock, NULL);
 867
 868         if (rc) {
 869                 /* this can be LMV fake import, whcih is not connected. */
 870                 if (!req->rq_import->imp_connection)
 871                         memset(osfs, 0, sizeof(*osfs));
 872                 GOTO(out, rc);
 873         }
 874
 875         msfs = lustre_swab_repbuf(req, 0, sizeof(*msfs),
 876                                   lustre_swab_obd_statfs);
 877         if (msfs == NULL) {
 878                 CERROR("Can't unpack obd_statfs\n");
 879                 GOTO(out, rc = -EPROTO);
 880         }
 881
 882         memcpy(osfs, msfs, sizeof (*msfs));
 883         EXIT;
 884 out:
 885         ptlrpc_req_finished(req);
 886         return rc;
 887 }
 888
 889 static int mdc_pin(struct obd_export *exp, obd_id ino, __u32 gen, int type,
 890                    struct obd_client_handle *handle, int flag)
 891 {
 892         struct ptlrpc_request *req;
 893         struct mds_body *body;
 894         int rc, size[2] = {0, sizeof(*body)};
 895         ENTRY;
 896
 897         //size[0] = lustre_secdesc_size();
 898
 899         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 900                               MDS_PIN, 2, size, NULL);
 901         if (req == NULL)
 902                 RETURN(-ENOMEM);
 903
 904         //lustre_pack_secdesc(req, size[0]);
 905
 906         body = lustre_msg_buf(req->rq_reqmsg,
 907                               MDS_REQ_REC_OFF, sizeof(*body));
 908
 909         /* FIXME-UMKA: here should be also mdsnum and fid. */
 910         mdc_pack_id(&body->id1, ino, gen, type, 0, 0);
 911         body->flags = flag;
 912
 913         req->rq_replen = lustre_msg_size(1, &size[1]);
 914
 915         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 916         rc = ptlrpc_queue_wait(req);
 917         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 918         if (rc) {
 919                 CERROR("pin failed: %d\n", rc);
 920                 ptlrpc_req_finished(req);
 921                 RETURN(rc);
 922         }
 923
 924         body = lustre_swab_repbuf(req, 0, sizeof(*body), lustre_swab_mds_body);
 925         if (body == NULL) {
 926                 ptlrpc_req_finished(req);
 927                 RETURN(rc);
 928         }
 929
 930         memcpy(&handle->och_fh, &body->handle, sizeof(body->handle));
 931         handle->och_magic = OBD_CLIENT_HANDLE_MAGIC;
 932
 933         OBD_ALLOC(handle->och_mod, sizeof(*handle->och_mod));
 934         if (handle->och_mod == NULL) {
 935                 DEBUG_REQ(D_ERROR, req, "can't allocate mdc_open_data");
 936                 RETURN(-ENOMEM);
 937         }
 938         handle->och_mod->mod_open_req = req; /* will be dropped by unpin */
 939
 940         RETURN(rc);
 941 }
 942
 943 static int mdc_unpin(struct obd_export *exp,
 944                      struct obd_client_handle *handle, int flag)
 945 {
 946         struct ptlrpc_request *req;
 947         struct mds_body *body;
 948         int rc, size[2] = {0, sizeof(*body)};
 949         ENTRY;
 950
 951         if (handle->och_magic != OBD_CLIENT_HANDLE_MAGIC)
 952                 RETURN(0);
 953
 954         //size[0] = lustre_secdesc_size();
 955
 956         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 957                               MDS_CLOSE, 2, size, NULL);
 958         if (req == NULL)
 959                 RETURN(-ENOMEM);
 960
 961         //lustre_pack_secdesc(req, size[0]);
 962
 963         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF, sizeof(*body));
 964         memcpy(&body->handle, &handle->och_fh, sizeof(body->handle));
 965         body->flags = flag;
 966
 967         req->rq_replen = lustre_msg_size(0, NULL);
 968         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 969         rc = ptlrpc_queue_wait(req);
 970         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 971
 972         if (rc != 0)
 973                 CERROR("unpin failed: %d\n", rc);
 974
 975         ptlrpc_req_finished(req);
 976         ptlrpc_req_finished(handle->och_mod->mod_open_req);
 977         OBD_FREE(handle->och_mod, sizeof(*handle->och_mod));
 978         RETURN(rc);
 979 }
 980
 981 int mdc_sync(struct obd_export *exp, struct lustre_id *id,
 982              struct ptlrpc_request **request)
 983 {
 984         struct ptlrpc_request *req;
 985         struct mds_body *body;
 986         int size[2] = {0, sizeof(*body)};
 987         int rc;
 988         ENTRY;
 989
 990         //size[0] = lustre_secdesc_size();
 991
 992         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 993                               MDS_SYNC, 2, size, NULL);
 994         if (!req)
 995                 RETURN(rc = -ENOMEM);
 996
 997         //lustre_pack_secdesc(req, size[0]);
 998
 999         if (id) {
1000                 body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF,
1001                                       sizeof (*body));
1002                 memcpy(&body->id1, id, sizeof(*id));
1003         }
1004
1005         req->rq_replen = lustre_msg_size(1, &size[1]);
1006
1007         rc = ptlrpc_queue_wait(req);
1008         if (rc || request == NULL)
1009                 ptlrpc_req_finished(req);
1010         else
1011                 *request = req;
1012
1013         RETURN(rc);
1014 }
1015
1016 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
1017                             enum obd_import_event event)
1018 {
1019         int rc = 0;
1020
1021         LASSERT(imp->imp_obd == obd);
1022
1023         switch (event) {
1024         case IMP_EVENT_DISCON: {
1025                 break;
1026         }
1027         case IMP_EVENT_INACTIVE: {
1028                 if (obd->obd_observer)
1029                         rc = obd_notify(obd->obd_observer, obd, 0, 0);
1030                 break;
1031         }
1032         case IMP_EVENT_INVALIDATE: {
1033                 struct ldlm_namespace *ns = obd->obd_namespace;
1034
1035                 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
1036
1037                 break;
1038         }
1039         case IMP_EVENT_ACTIVE: {
1040                 if (obd->obd_observer)
1041                         rc = obd_notify(obd->obd_observer, obd, 1, 0);
1042                 break;
1043         }
1044         default:
1045                 CERROR("Unknown import event %d\n", event);
1046                 LBUG();
1047         }
1048         RETURN(rc);
1049 }
1050
1051 static int mdc_attach(struct obd_device *dev, obd_count len, void *data)
1052 {
1053         struct lprocfs_static_vars lvars;
1054
1055         lprocfs_init_vars(mdc, &lvars);
1056         return lprocfs_obd_attach(dev, lvars.obd_vars);
1057 }
1058
1059 static int mdc_detach(struct obd_device *dev)
1060 {
1061         return lprocfs_obd_detach(dev);
1062 }
1063
1064 static int mdc_setup(struct obd_device *obd, obd_count len, void *buf)
1065 {
1066         struct client_obd *cli = &obd->u.cli;
1067         int rc;
1068         ENTRY;
1069
1070         OBD_ALLOC(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1071         if (!cli->cl_rpc_lock)
1072                 RETURN(-ENOMEM);
1073         mdc_init_rpc_lock(cli->cl_rpc_lock);
1074
1075         ptlrpcd_addref();
1076
1077         OBD_ALLOC(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1078         if (!cli->cl_setattr_lock)
1079                 GOTO(err_rpc_lock, rc = -ENOMEM);
1080         mdc_init_rpc_lock(cli->cl_setattr_lock);
1081
1082         OBD_ALLOC(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1083         if (!cli->cl_close_lock)
1084                 GOTO(err_setattr_lock, rc = -ENOMEM);
1085         mdc_init_rpc_lock(cli->cl_close_lock);
1086
1087         rc = client_obd_setup(obd, len, buf);
1088         if (rc)
1089                 GOTO(err_close_lock, rc);
1090
1091         rc = obd_llog_init(obd, &obd->obd_llogs, obd, 0, NULL);
1092         if (rc) {
1093                 mdc_cleanup(obd, 0);
1094                 CERROR("failed to setup llogging subsystems\n");
1095         }
1096
1097         RETURN(rc);
1098
1099 err_close_lock:
1100         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1101 err_setattr_lock:
1102         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1103 err_rpc_lock:
1104         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1105         ptlrpcd_decref();
1106         RETURN(rc);
1107 }
1108
1109 static int mdc_init_ea_size(struct obd_export *exp, int easize, int cookiesize)
1110 {
1111         struct obd_device *obd = exp->exp_obd;
1112         struct client_obd *cli = &obd->u.cli;
1113         ENTRY;
1114
1115         if (cli->cl_max_mds_easize < easize)
1116                 cli->cl_max_mds_easize = easize;
1117         if (cli->cl_max_mds_cookiesize < cookiesize)
1118                 cli->cl_max_mds_cookiesize = cookiesize;
1119         RETURN(0);
1120 }
1121
1122 static int mdc_precleanup(struct obd_device *obd, int flags)
1123 {
1124         int rc = 0;
1125
1126         rc = obd_llog_finish(obd, &obd->obd_llogs, 0);
1127         if (rc != 0)
1128                 CERROR("failed to cleanup llogging subsystems\n");
1129
1130         RETURN(rc);
1131 }
1132
1133 static int mdc_cleanup(struct obd_device *obd, int flags)
1134 {
1135         struct client_obd *cli = &obd->u.cli;
1136
1137         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1138         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1139         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1140
1141         ptlrpcd_decref();
1142
1143         return client_obd_cleanup(obd, flags);
1144 }
1145
1146
1147 static int mdc_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
1148                          struct obd_device *tgt, int count,
1149                          struct llog_catid *logid)
1150 {
1151         struct llog_ctxt *ctxt;
1152         int rc;
1153         ENTRY;
1154
1155         rc = obd_llog_setup(obd, llogs, LLOG_CONFIG_REPL_CTXT, tgt, 0, NULL,
1156                             &llog_client_ops);
1157         if (rc == 0) {
1158                 ctxt = llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT);
1159                 ctxt->loc_imp = obd->u.cli.cl_import;
1160         }
1161
1162         RETURN(rc);
1163 }
1164
1165 static int mdc_llog_finish(struct obd_device *obd,
1166                            struct obd_llogs *llogs, int count)
1167 {
1168         int rc;
1169         ENTRY;
1170
1171         rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT));
1172         RETURN(rc);
1173 }
1174 static struct obd_device *mdc_get_real_obd(struct obd_export *exp,
1175                                            struct lustre_id *id)
1176 {
1177        ENTRY;
1178        RETURN(exp->exp_obd);
1179 }
1180
1181 static int mdc_get_info(struct obd_export *exp, __u32 keylen,
1182                         void *key, __u32 *valsize, void *val)
1183 {
1184         struct ptlrpc_request *req;
1185         char *bufs[1] = {key};
1186         int rc = 0;
1187         ENTRY;
1188
1189         if (!valsize || !val)
1190                 RETURN(-EFAULT);
1191
1192         if (keylen == strlen("remote_flag") && !strcmp(key, "remote_flag")) {
1193                 struct obd_import *imp;
1194                 struct obd_connect_data *data;
1195
1196                 imp = class_exp2cliimp(exp);
1197                 if (!imp) {
1198                         LBUG();
1199                         RETURN(-EINVAL);
1200                 }
1201
1202                 if (imp->imp_state != LUSTRE_IMP_FULL) {
1203                         CERROR("import state not full\n");
1204                         RETURN(-EINVAL);
1205                 }
1206
1207                 data = &imp->imp_connect_data;
1208                 if (data->ocd_connect_flags & OBD_CONNECT_REMOTE) {
1209                         *((int *)val) = 1;
1210                         RETURN(0);
1211                 } else if (data->ocd_connect_flags & OBD_CONNECT_LOCAL) {
1212                         *((int *)val) = 0;
1213                         RETURN(0);
1214                 }
1215                 CERROR("no remote flag set?\n");
1216                 RETURN(-EINVAL);
1217         }
1218
1219         if ((keylen < strlen("mdsize") || strcmp(key, "mdsize") != 0) &&
1220             (keylen < strlen("mdsnum") || strcmp(key, "mdsnum") != 0) &&
1221             (keylen < strlen("rootid") || strcmp(key, "rootid") != 0))
1222                 RETURN(-EPROTO);
1223
1224         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
1225                               OST_GET_INFO, 1, (int *)&keylen, bufs);
1226         if (req == NULL)
1227                 RETURN(-ENOMEM);
1228
1229         req->rq_replen = lustre_msg_size(1, (int *)valsize);
1230         rc = ptlrpc_queue_wait(req);
1231         if (rc)
1232                 GOTO(out_req, rc);
1233
1234         if (keylen >= strlen("rootid") && !strcmp(key, "rootid")) {
1235                 struct lustre_id *reply;
1236
1237                 reply = lustre_swab_repbuf(req, 0, sizeof(*reply),
1238                                            lustre_swab_lustre_id);
1239                 if (reply == NULL) {
1240                         CERROR("Can't unpack %s\n", (char *)key);
1241                         GOTO(out_req, rc = -EPROTO);
1242                 }
1243
1244                 *(struct lustre_id *)val = *reply;
1245         } else {
1246                 __u32 *reply;
1247
1248                 reply = lustre_swab_repbuf(req, 0, sizeof(*reply),
1249                                            lustre_swab_generic_32s);
1250                 if (reply == NULL) {
1251                         CERROR("Can't unpack %s\n", (char *)key);
1252                         GOTO(out_req, rc = -EPROTO);
1253                 }
1254                 *((__u32 *)val) = *reply;
1255         }
1256 out_req:
1257         ptlrpc_req_finished(req);
1258         RETURN(rc);
1259 }
1260
1261 int mdc_obj_create(struct obd_export *exp, struct obdo *oa,
1262                    void *acl, int acl_size,
1263                    struct lov_stripe_md **ea, struct obd_trans_info *oti)
1264 {
1265         struct ptlrpc_request *request;
1266         struct ost_body *body;
1267         char *acl_buf;
1268         int rc, size[2] = { sizeof(*body), acl_size };
1269         ENTRY;
1270
1271         LASSERT(oa);
1272
1273         request = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
1274                                   OST_CREATE, 2, size, NULL);
1275         if (!request)
1276                 GOTO(out_req, rc = -ENOMEM);
1277
1278         body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
1279         memcpy(&body->oa, oa, sizeof(body->oa));
1280
1281         if (acl_size) {
1282                 acl_buf = lustre_msg_buf(request->rq_reqmsg, 1, acl_size);
1283                 memcpy(acl_buf, acl, acl_size);
1284         }
1285
1286         request->rq_replen = lustre_msg_size(1, size);
1287         rc = ptlrpc_queue_wait(request);
1288         if (rc)
1289                 GOTO(out_req, rc);
1290
1291         body = lustre_swab_repbuf(request, 0, sizeof(*body),
1292                                   lustre_swab_ost_body);
1293         if (body == NULL) {
1294                 CERROR ("can't unpack ost_body\n");
1295                 GOTO (out_req, rc = -EPROTO);
1296         }
1297
1298         memcpy(oa, &body->oa, sizeof(*oa));
1299
1300         /* store ino/generation for recovery */
1301         body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
1302         body->oa.o_id = oa->o_id;
1303         body->oa.o_generation = oa->o_generation;
1304         body->oa.o_fid = oa->o_fid;
1305         body->oa.o_mds = oa->o_mds;
1306
1307         CDEBUG(D_HA, "transno: "LPD64"\n", request->rq_repmsg->transno);
1308         EXIT;
1309 out_req:
1310         ptlrpc_req_finished(request);
1311         return rc;
1312 }
1313
1314 int mdc_brw(int rw, struct obd_export *exp, struct obdo *oa,
1315             struct lov_stripe_md *ea, obd_count oa_bufs,
1316             struct brw_page *pgarr, struct obd_trans_info *oti)
1317 {
1318         struct ptlrpc_bulk_desc *desc;
1319         struct niobuf_remote *niobuf;
1320         struct ptlrpc_request *req;
1321         struct obd_ioobj *ioobj;
1322         struct ost_body *body;
1323         int err, opc, i;
1324         int size[3];
1325
1326         opc = ((rw & OBD_BRW_WRITE) != 0) ? OST_WRITE : OST_READ;
1327
1328         size[0] = sizeof(*body);
1329         size[1] = sizeof(*ioobj);
1330         size[2] = oa_bufs * sizeof(*niobuf);
1331
1332         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION, opc,
1333                               3, size, NULL);
1334         LASSERT(req != NULL);
1335
1336         if (opc == OST_WRITE)
1337                 desc = ptlrpc_prep_bulk_imp(req, oa_bufs, BULK_GET_SOURCE,
1338                                             OST_BULK_PORTAL);
1339         else
1340                 desc = ptlrpc_prep_bulk_imp(req, oa_bufs, BULK_PUT_SINK,
1341                                             OST_BULK_PORTAL);
1342         LASSERT(desc != NULL);
1343
1344         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
1345         ioobj = lustre_msg_buf(req->rq_reqmsg, 1, sizeof(*ioobj));
1346         niobuf = lustre_msg_buf(req->rq_reqmsg, 2, oa_bufs * sizeof(*niobuf));
1347
1348         memcpy(&body->oa, oa, sizeof(*oa));
1349         obdo_to_ioobj(oa, ioobj);
1350         ioobj->ioo_bufcnt = oa_bufs;
1351
1352         for (i = 0; i < oa_bufs; i++, niobuf++) {
1353                 struct brw_page *pg = &pgarr[i];
1354
1355                 LASSERT(pg->count > 0);
1356                 LASSERT((pg->disk_offset & ~PAGE_MASK) + pg->count <= PAGE_SIZE);
1357
1358                 ptlrpc_prep_bulk_page(desc, pg->pg, pg->disk_offset & ~PAGE_MASK,
1359                                       pg->count);
1360
1361                 niobuf->offset = pg->disk_offset;
1362                 niobuf->len = pg->count;
1363                 niobuf->flags = pg->flag;
1364         }
1365
1366         /* size[0] still sizeof (*body) */
1367         if (opc == OST_WRITE) {
1368                 /* 1 RC per niobuf */
1369                 size[1] = sizeof(__u32) * oa_bufs;
1370                 req->rq_replen = lustre_msg_size(2, size);
1371         } else {
1372                 /* 1 RC for the whole I/O */
1373                 req->rq_replen = lustre_msg_size(1, size);
1374         }
1375         err = ptlrpc_queue_wait(req);
1376         LASSERT(err == 0);
1377
1378         ptlrpc_req_finished(req);
1379         return 0;
1380 }
1381
1382 static int mdc_valid_attrs(struct obd_export *exp,
1383                            struct lustre_id *id)
1384 {
1385         struct ldlm_res_id res_id = { .name = {0} };
1386         struct obd_device *obd = exp->exp_obd;
1387         struct lustre_handle lockh;
1388         ldlm_policy_data_t policy;
1389         int flags;
1390         ENTRY;
1391
1392         res_id.name[0] = id_fid(id);
1393         res_id.name[1] = id_group(id);
1394         policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1395
1396         CDEBUG(D_INFO, "trying to match res "LPU64"\n",
1397                res_id.name[0]);
1398
1399         /* FIXME use LDLM_FL_TEST_LOCK instead */
1400         flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING;
1401         if (ldlm_lock_match(obd->obd_namespace, flags, &res_id,
1402                             LDLM_IBITS, &policy, LCK_PR, &lockh)) {
1403                 ldlm_lock_decref(&lockh, LCK_PR);
1404                 RETURN(1);
1405         }
1406
1407         if (ldlm_lock_match(obd->obd_namespace, flags, &res_id,
1408                             LDLM_IBITS, &policy, LCK_PW, &lockh)) {
1409                 ldlm_lock_decref(&lockh, LCK_PW);
1410                 RETURN(1);
1411         }
1412         RETURN(0);
1413 }
1414
1415 static int mdc_change_cbdata_name(struct obd_export *exp,
1416                                   struct lustre_id *pid,
1417                                   char *name, int len,
1418                                   struct lustre_id *cid,
1419                                   ldlm_iterator_t it, void *data)
1420 {
1421         int rc;
1422         rc = mdc_change_cbdata(exp, cid, it, data);
1423         RETURN(rc);
1424 }
1425
1426 struct obd_ops mdc_obd_ops = {
1427         .o_owner         = THIS_MODULE,
1428         .o_attach        = mdc_attach,
1429         .o_detach        = mdc_detach,
1430         .o_setup         = mdc_setup,
1431         .o_precleanup    = mdc_precleanup,
1432         .o_cleanup       = mdc_cleanup,
1433         .o_add_conn      = client_import_add_conn,
1434         .o_del_conn      = client_import_del_conn,
1435         .o_connect       = client_connect_import,
1436         .o_disconnect    = client_disconnect_export,
1437         .o_iocontrol     = mdc_iocontrol,
1438         .o_packmd        = mdc_packmd,
1439         .o_unpackmd      = mdc_unpackmd,
1440         .o_statfs        = mdc_statfs,
1441         .o_pin           = mdc_pin,
1442         .o_unpin         = mdc_unpin,
1443         .o_import_event  = mdc_import_event,
1444         .o_llog_init     = mdc_llog_init,
1445         .o_llog_finish   = mdc_llog_finish,
1446         .o_create        = mdc_obj_create,
1447         .o_set_info      = mdc_set_info,
1448         .o_get_info      = mdc_get_info,
1449         .o_brw           = mdc_brw,
1450         .o_cancel_unused = mdc_cancel_unused,
1451         .o_init_ea_size  = mdc_init_ea_size,
1452 };
1453
1454 struct md_ops mdc_md_ops = {
1455         .m_getstatus     = mdc_getstatus,
1456         .m_getattr       = mdc_getattr,
1457         .m_close         = mdc_close,
1458         .m_create        = mdc_create,
1459         .m_done_writing  = mdc_done_writing,
1460         .m_enqueue       = mdc_enqueue,
1461         .m_getattr_lock  = mdc_getattr_lock,
1462         .m_intent_lock   = mdc_intent_lock,
1463         .m_link          = mdc_link,
1464         .m_rename        = mdc_rename,
1465         .m_setattr       = mdc_setattr,
1466         .m_sync          = mdc_sync,
1467         .m_readpage      = mdc_readpage,
1468         .m_unlink        = mdc_unlink,
1469         .m_valid_attrs   = mdc_valid_attrs,
1470         .m_req2lustre_md = mdc_req2lustre_md,
1471         .m_set_open_replay_data   = mdc_set_open_replay_data,
1472         .m_clear_open_replay_data = mdc_clear_open_replay_data,
1473         .m_store_inode_generation = mdc_store_inode_generation,
1474         .m_set_lock_data = mdc_set_lock_data,
1475         .m_get_real_obd  = mdc_get_real_obd,
1476         .m_change_cbdata_name = mdc_change_cbdata_name,
1477         .m_change_cbdata = mdc_change_cbdata,
1478 };
1479
1480 int __init mdc_init(void)
1481 {
1482         struct lprocfs_static_vars lvars;
1483
1484         lprocfs_init_vars(mdc, &lvars);
1485         return class_register_type(&mdc_obd_ops, &mdc_md_ops,
1486                                    lvars.module_vars, OBD_MDC_DEVICENAME);
1487 }
1488
1489 #ifdef __KERNEL__
1490 static void /*__exit*/ mdc_exit(void)
1491 {
1492         class_unregister_type(OBD_MDC_DEVICENAME);
1493 }
1494
1495 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1496 MODULE_DESCRIPTION("Lustre Metadata Client");
1497 MODULE_LICENSE("GPL");
1498
1499 EXPORT_SYMBOL(mdc_req2lustre_md);
1500 EXPORT_SYMBOL(mdc_change_cbdata);
1501 EXPORT_SYMBOL(mdc_getstatus);
1502 EXPORT_SYMBOL(mdc_getattr);
1503 EXPORT_SYMBOL(mdc_getattr_lock);
1504 EXPORT_SYMBOL(mdc_create);
1505 EXPORT_SYMBOL(mdc_unlink);
1506 EXPORT_SYMBOL(mdc_rename);
1507 EXPORT_SYMBOL(mdc_link);
1508 EXPORT_SYMBOL(mdc_readpage);
1509 EXPORT_SYMBOL(mdc_setattr);
1510 EXPORT_SYMBOL(mdc_close);
1511 EXPORT_SYMBOL(mdc_done_writing);
1512 EXPORT_SYMBOL(mdc_sync);
1513 EXPORT_SYMBOL(mdc_set_open_replay_data);
1514 EXPORT_SYMBOL(mdc_clear_open_replay_data);
1515 EXPORT_SYMBOL(mdc_store_inode_generation);
1516
1517 module_init(mdc_init);
1518 module_exit(mdc_exit);
1519 #endif