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 <linux/lustre_gs.h>
  43 #include "mdc_internal.h"
  44
  45 #define REQUEST_MINOR 244
  46
  47 static int mdc_cleanup(struct obd_device *obd, int flags);
  48
  49 extern int mds_queue_req(struct ptlrpc_request *);
  50 /* Helper that implements most of mdc_getstatus and signal_completed_replay. */
  51 /* XXX this should become mdc_get_info("key"), sending MDS_GET_INFO RPC */
  52 static int send_getstatus(struct obd_import *imp, struct lustre_id *rootid,
  53                           int level, int msg_flags)
  54 {
  55         struct ptlrpc_request *req;
  56         struct mds_body *body;
  57         int rc, size[2] = {0, sizeof(*body)};
  58         ENTRY;
  59
  60         //size[0] = lustre_secdesc_size();
  61
  62         req = ptlrpc_prep_req(imp, LUSTRE_MDS_VERSION, MDS_GETSTATUS,
  63                               2, size, NULL);
  64         if (!req)
  65                 GOTO(out, rc = -ENOMEM);
  66
  67         //lustre_pack_secdesc(req, size[0]);
  68
  69         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF, sizeof (*body));
  70         req->rq_send_state = level;
  71         req->rq_replen = lustre_msg_size(1, &size[1]);
  72
  73         req->rq_reqmsg->flags |= msg_flags;
  74         rc = ptlrpc_queue_wait(req);
  75
  76         if (!rc) {
  77                 body = lustre_swab_repbuf (req, 0, sizeof (*body),
  78                                            lustre_swab_mds_body);
  79                 if (body == NULL) {
  80                         CERROR ("Can't extract mds_body\n");
  81                         GOTO (out, rc = -EPROTO);
  82                 }
  83
  84                 memcpy(rootid, &body->id1, sizeof(*rootid));
  85
  86                 CDEBUG(D_NET, "root ino="LPU64", last_committed="LPU64
  87                        ", last_xid="LPU64"\n", rootid->li_stc.u.e3s.l3s_ino,
  88                        req->rq_repmsg->last_committed, req->rq_repmsg->last_xid);
  89         }
  90
  91         EXIT;
  92  out:
  93         ptlrpc_req_finished(req);
  94         return rc;
  95 }
  96
  97 /* This should be mdc_get_info("rootid") */
  98 int mdc_getstatus(struct obd_export *exp, struct lustre_id *rootid)
  99 {
 100         return send_getstatus(class_exp2cliimp(exp), rootid,
 101                               LUSTRE_IMP_FULL, 0);
 102 }
 103
 104 int mdc_getattr_common(struct obd_export *exp, unsigned int ea_size,
 105                        struct ptlrpc_request *req)
 106 {
 107         struct mds_body *body, *reqbody;
 108         void            *eadata;
 109         int              rc;
 110         int              repsize[2] = {sizeof(*body)};
 111         int              bufcount = 1;
 112         ENTRY;
 113
 114         /* request message already built */
 115
 116         if (ea_size != 0) {
 117                 repsize[bufcount++] = ea_size;
 118                 CDEBUG(D_INODE, "reserved %u bytes for MD/symlink in packet\n",
 119                        ea_size);
 120         }
 121
 122         reqbody = lustre_msg_buf(req->rq_reqmsg, 1, sizeof(*reqbody));
 123         LASSERT(!(reqbody->valid & OBD_MD_FLACL));
 124
 125         if (reqbody->valid & OBD_MD_FLKEY) {
 126                 repsize[bufcount++] = 5;
 127                 repsize[bufcount++] = sizeof(struct lustre_key);
 128         }
 129
 130         req->rq_replen = lustre_msg_size(bufcount, repsize);
 131
 132         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 133         rc = ptlrpc_queue_wait(req);
 134         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 135         if (rc != 0)
 136                 RETURN (rc);
 137
 138         body = lustre_swab_repbuf (req, 0, sizeof (*body),
 139                                    lustre_swab_mds_body);
 140         if (body == NULL) {
 141                 CERROR ("Can't unpack mds_body\n");
 142                 RETURN (-EPROTO);
 143         }
 144
 145         CDEBUG(D_NET, "mode: %o\n", body->mode);
 146
 147         LASSERT_REPSWAB (req, 1);
 148
 149         /* Skip the check if getxattr/listxattr are called with no buffers */
 150         if ((reqbody->eadatasize != 0) &&
 151             !(reqbody->valid & (OBD_MD_FLXATTR | OBD_MD_FLXATTRLIST))) {
 152                 /* reply indicates presence of eadata; check it's there... */
 153                 eadata = lustre_msg_buf (req->rq_repmsg, 1,
 154                                          body->eadatasize);
 155                 if (eadata == NULL) {
 156                         CERROR ("Missing/short eadata\n");
 157                         RETURN (-EPROTO);
 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 *xattr_name,
 177                 const void *xattr_data, unsigned int xattr_datalen,
 178                 unsigned int ea_size, struct ptlrpc_request **request)
 179 {
 180         struct ptlrpc_request *req;
 181         struct mds_body *body;
 182         int xattr_namelen = xattr_name ? strlen(xattr_name) + 1 : 0;
 183         int size[4] = {0, sizeof(*body)};
 184         int bufcount = 2;
 185         int rc;
 186         ENTRY;
 187
 188         size[0] = lustre_secdesc_size();
 189
 190         if (valid & OBD_MD_FLXATTR) {
 191                 size[bufcount++] = xattr_namelen;
 192
 193                 if (xattr_datalen > 0) {
 194                         LASSERT(xattr_data);
 195                         size[bufcount++] = xattr_datalen;
 196                 }
 197         } else
 198                 LASSERT(!xattr_data && !xattr_datalen);
 199
 200         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 201                               MDS_GETATTR, bufcount, size, NULL);
 202         if (!req)
 203                 GOTO(out, rc = -ENOMEM);
 204
 205         lustre_pack_secdesc(req, size[0]);
 206
 207         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF, sizeof (*body));
 208         memcpy(&body->id1, id, sizeof(*id));
 209         body->valid = valid;
 210         body->eadatasize = ea_size;
 211
 212         if (valid & OBD_MD_FLXATTR) {
 213                 memcpy(lustre_msg_buf(req->rq_reqmsg, 2, xattr_namelen),
 214                        xattr_name, xattr_namelen);
 215                 if (xattr_datalen)
 216                         memcpy(lustre_msg_buf(req->rq_reqmsg, 3, xattr_datalen),
 217                                xattr_data, xattr_datalen);
 218         }
 219
 220         rc = mdc_getattr_common(exp, ea_size, req);
 221         if (rc != 0) {
 222                 ptlrpc_req_finished (req);
 223                 req = NULL;
 224         }
 225  out:
 226         *request = req;
 227         RETURN (rc);
 228 }
 229
 230 int mdc_access_check(struct obd_export *exp, struct lustre_id *id,
 231                      struct ptlrpc_request **request)
 232
 233 {
 234         struct ptlrpc_request *req;
 235         struct mds_body *body;
 236         int size[2] = {0, sizeof(*body)};
 237         int rc;
 238         ENTRY;
 239
 240         size[0] = lustre_secdesc_size();
 241         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 242                               MDS_ACCESS_CHECK, 2, size, NULL);
 243         if (!req)
 244                 GOTO(out, rc = -ENOMEM);
 245
 246         lustre_pack_secdesc(req, size[0]);
 247         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF, sizeof (*body));
 248         memcpy(&body->id1, id, sizeof(*id));
 249
 250         req->rq_replen = lustre_msg_size(2, size);
 251         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 252         rc = ptlrpc_queue_wait(req);
 253         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 254         if (rc != 0) {
 255                 ptlrpc_req_finished (req);
 256                 req = NULL;
 257         } else {
 258                 body = lustre_swab_repbuf (req, 0, sizeof (*body),
 259                                            lustre_swab_mds_body);
 260                 if (body == NULL) {
 261                         CERROR ("Can't unpack mds_body\n");
 262                         RETURN (-EPROTO);
 263                 }
 264         }
 265
 266  out:
 267         *request = req;
 268         RETURN (rc);
 269 }
 270
 271 int mdc_getattr_lock(struct obd_export *exp, struct lustre_id *id,
 272                      char *filename, int namelen, __u64 valid,
 273                      unsigned int ea_size, struct ptlrpc_request **request)
 274 {
 275         struct ptlrpc_request *req;
 276         struct mds_body *body;
 277         int rc, size[3] = {0, sizeof(*body), namelen};
 278         ENTRY;
 279
 280         size[0] = lustre_secdesc_size();
 281
 282         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 283                               MDS_GETATTR_LOCK, 3, size, NULL);
 284         if (!req)
 285                 GOTO(out, rc = -ENOMEM);
 286
 287         lustre_pack_secdesc(req, size[0]);
 288
 289         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF, sizeof (*body));
 290         memcpy(&body->id1, id, sizeof(*id));
 291         body->valid = valid;
 292         body->eadatasize = ea_size;
 293
 294         if (filename != NULL) {
 295                 LASSERT (strnlen (filename, namelen) == namelen - 1);
 296                 memcpy(lustre_msg_buf(req->rq_reqmsg, 2, namelen),
 297                        filename, namelen);
 298         } else {
 299                 LASSERT(namelen == 1);
 300         }
 301
 302         rc = mdc_getattr_common(exp, ea_size, req);
 303         if (rc != 0) {
 304                 ptlrpc_req_finished (req);
 305                 req = NULL;
 306         }
 307  out:
 308         *request = req;
 309         RETURN(rc);
 310 }
 311
 312 /* This should be called with both the request and the reply still packed. */
 313 int mdc_store_inode_generation(struct obd_export *exp,
 314                                struct ptlrpc_request *req,
 315                                int reqoff, int repoff)
 316 {
 317         struct mds_rec_create *rec =
 318                 lustre_msg_buf(req->rq_reqmsg, reqoff, sizeof(*rec));
 319         struct mds_body *body =
 320                 lustre_msg_buf(req->rq_repmsg, repoff, sizeof(*body));
 321
 322         LASSERT (rec != NULL);
 323         LASSERT (body != NULL);
 324
 325         memcpy(&rec->cr_replayid, &body->id1, sizeof(rec->cr_replayid));
 326         DEBUG_REQ(D_HA, req, "storing generation for ino "DLID4,
 327                   OLID4(&rec->cr_replayid));
 328         return 0;
 329 }
 330
 331 static int mdc_unpack_acl(struct obd_export *exp_lmv, struct ptlrpc_request *req,
 332                           unsigned int *offset, struct lustre_md *md)
 333 {
 334         struct posix_acl *acl;
 335         struct mds_remote_perm *perm;
 336         int    size, acl_off = 0, rc = 0;
 337         void   *buf;
 338
 339         /* if anything wrong when unpacking md, we don't check acl
 340          * stuff, for simplicity
 341          */
 342         if (md->body->valid & OBD_MD_FLACL) {
 343                 acl_off = *offset;
 344                 if (md->body->valid & OBD_MD_FLRMTACL) {
 345
 346                         buf = lustre_swab_repbuf(req, acl_off++, sizeof(*perm),
 347                                                  lustre_swab_remote_perm);
 348                         if (buf == NULL) {
 349                                 CERROR("Can't unpack remote perm\n");
 350                                 RETURN(0);
 351                         }
 352                         OBD_ALLOC(perm, sizeof(*perm));
 353                         if (!perm)
 354                                 RETURN(-ENOMEM);
 355                         memcpy(perm, buf, sizeof(*perm));
 356                         md->remote_perm = perm;
 357                         *offset = acl_off;
 358                 } else {
 359                         size = le32_to_cpu(*(__u32 *) lustre_msg_buf(
 360                                            req->rq_repmsg, acl_off++, 4));
 361                         buf = lustre_msg_buf(req->rq_repmsg, acl_off++, size);
 362
 363                         acl = posix_acl_from_xattr(buf, size);
 364                         *offset = acl_off;
 365                         if (IS_ERR(acl)) {
 366                                 rc = PTR_ERR(acl);
 367                                 CERROR("convert xattr to acl failed: %d\n", rc);
 368                                 RETURN(0);
 369                         } else if (acl) {
 370                                 rc = posix_acl_valid(acl);
 371                                 if (rc) {
 372                                         CERROR("acl valid error: %d\n", rc);
 373                                         posix_acl_release(acl);
 374                                         RETURN(0);
 375                                 }
 376                         }
 377                         md->posix_acl = acl;
 378                 }
 379         }
 380         RETURN(rc);
 381 }
 382 static int mdc_unpack_gskey(struct obd_export *exp_lmv, struct ptlrpc_request *req,
 383                             unsigned int *offset, struct lustre_md *md)
 384 {
 385         int key_off = 0, rc = 0, size = 0;
 386         void *buf;
 387
 388         key_off = *offset;
 389         if (md->body->valid & OBD_MD_FLKEY) {
 390                 size = le32_to_cpu(*(__u32 *) lustre_msg_buf(req->rq_repmsg,
 391                                    key_off++, 4));
 392                 buf = lustre_msg_buf(req->rq_repmsg, key_off++, size);
 393
 394                 CDEBUG(D_INFO, "buf %p key_off %d size %d \n",
 395                        buf, key_off, size);
 396                 md->key = (struct lustre_key *)buf;
 397                 *offset = key_off;
 398         }
 399         RETURN(rc);
 400 }
 401 int mdc_req2lustre_md(struct obd_export *exp_lmv, struct ptlrpc_request *req,
 402                       unsigned int offset, struct obd_export *exp_lov,
 403                       struct lustre_md *md)
 404 {
 405         struct lov_mds_md *lmm;
 406         int rc = 0, reply_off;
 407         ENTRY;
 408
 409         LASSERT(md != NULL);
 410         memset(md, 0, sizeof(*md));
 411
 412         md->body = lustre_msg_buf(req->rq_repmsg, offset,
 413                                   sizeof(*md->body));
 414         if (!md->body)
 415                 RETURN(-ENOMEM);
 416
 417         LASSERT_REPSWABBED(req, offset);
 418
 419         if (!(md->body->valid & OBD_MD_FLEASIZE) &&
 420             !(md->body->valid & OBD_MD_FLDIREA))
 421                 RETURN(0);
 422
 423         if (S_ISREG(md->body->mode)) {
 424                 if (md->body->eadatasize == 0) {
 425                         CERROR("invalid EA size (0) is detected\n");
 426                         RETURN(-EPROTO);
 427                 }
 428
 429                 lmm = lustre_msg_buf(req->rq_repmsg, offset + 1,
 430                                      md->body->eadatasize);
 431                 if (!lmm)
 432                         RETURN(-EINVAL);
 433
 434                 LASSERT(exp_lov != NULL);
 435
 436                 rc = obd_unpackmd(exp_lov, &md->lsm, lmm,
 437                                   md->body->eadatasize);
 438                 if (rc > 0) {
 439                         LASSERT(rc >= sizeof(*md->lsm));
 440                         rc = 0;
 441                 }
 442         } else if (S_ISDIR(md->body->mode)) {
 443                 /* dir can be non-splitted */
 444                 if (md->body->eadatasize == 0)
 445                         RETURN(0);
 446
 447                 lmm = lustre_msg_buf(req->rq_repmsg, offset + 1,
 448                                      md->body->eadatasize);
 449                 if (!lmm)
 450                         RETURN(-EINVAL);
 451
 452                 if (md->body->valid & OBD_MD_MEA) {
 453                         LASSERT(exp_lmv != NULL);
 454
 455                         rc = obd_unpackmd(exp_lmv, (void *)&md->mea,
 456                                           lmm, md->body->eadatasize);
 457                         if (rc > 0) {
 458                                 LASSERT(rc >= sizeof(*md->mea));
 459                                 rc = 0;
 460                         }
 461                 }
 462         } else {
 463                 LASSERT(S_ISCHR(md->body->mode) ||
 464                         S_ISBLK(md->body->mode) ||
 465                         S_ISFIFO(md->body->mode)||
 466                         S_ISLNK(md->body->mode) ||
 467                         S_ISSOCK(md->body->mode));
 468         }
 469
 470         reply_off = (md->body->valid & OBD_MD_FLEASIZE) ?
 471                                 (offset + 2) : (offset + 1);
 472         rc = mdc_unpack_acl(exp_lmv, req, &reply_off, md);
 473         if (rc) {
 474                 CERROR("upack acl error %d \n", rc);
 475                 RETURN(rc);
 476         }
 477
 478         rc = mdc_unpack_gskey(exp_lmv, req, &reply_off, md);
 479         if (rc)
 480                 RETURN(rc);
 481
 482         RETURN(rc);
 483 }
 484
 485 static void mdc_commit_open(struct ptlrpc_request *req)
 486 {
 487         struct mdc_open_data *mod = req->rq_cb_data;
 488         if (mod == NULL)
 489                 return;
 490
 491         if (mod->mod_close_req != NULL)
 492                 mod->mod_close_req->rq_cb_data = NULL;
 493
 494         if (mod->mod_och != NULL)
 495                 mod->mod_och->och_mod = NULL;
 496
 497         OBD_FREE(mod, sizeof(*mod));
 498         req->rq_cb_data = NULL;
 499         LASSERT(atomic_read(&req->rq_refcount) > 1);
 500         ptlrpc_req_finished(req);
 501 }
 502
 503 static void mdc_replay_open(struct ptlrpc_request *req)
 504 {
 505         struct mdc_open_data *mod = req->rq_cb_data;
 506         struct obd_client_handle *och;
 507         struct ptlrpc_request *close_req;
 508         struct lustre_handle old;
 509         struct mds_body *body;
 510         ENTRY;
 511
 512         body = lustre_swab_repbuf(req, 1, sizeof(*body), lustre_swab_mds_body);
 513         LASSERT (body != NULL);
 514
 515         if (mod == NULL) {
 516                 DEBUG_REQ(D_ERROR, req,
 517                           "can't properly replay without open data");
 518                 EXIT;
 519                 return;
 520         }
 521
 522         och = mod->mod_och;
 523         if (och != NULL) {
 524                 struct lustre_handle *file_fh;
 525                 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
 526                 file_fh = &och->och_fh;
 527                 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
 528                        file_fh->cookie, body->handle.cookie);
 529                 memcpy(&old, file_fh, sizeof(old));
 530                 memcpy(file_fh, &body->handle, sizeof(*file_fh));
 531         }
 532
 533         close_req = mod->mod_close_req;
 534         if (close_req != NULL) {
 535                 struct mds_body *close_body;
 536                 LASSERT(close_req->rq_reqmsg->opc == MDS_CLOSE);
 537                 close_body = lustre_msg_buf(close_req->rq_reqmsg,
 538                                             MDS_REQ_REC_OFF,
 539                                             sizeof(*close_body));
 540                 if (och != NULL)
 541                         LASSERT(!memcmp(&old, &close_body->handle, sizeof old));
 542                 DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
 543                 memcpy(&close_body->handle, &body->handle,
 544                        sizeof(close_body->handle));
 545         }
 546
 547         EXIT;
 548 }
 549
 550 int mdc_set_open_replay_data(struct obd_export *exp,
 551                              struct obd_client_handle *och,
 552                              struct ptlrpc_request *open_req)
 553 {
 554         struct mdc_open_data *mod;
 555         struct mds_rec_create *rec;
 556         struct mds_body *body;
 557
 558         rec = lustre_msg_buf(open_req->rq_reqmsg, MDS_REQ_INTENT_REC_OFF,
 559                              sizeof(*rec));
 560         body = lustre_msg_buf(open_req->rq_repmsg, 1, sizeof(*body));
 561
 562         LASSERT(rec != NULL);
 563         /* outgoing messages always in my byte order */
 564         LASSERT(body != NULL);
 565         /* incoming message in my byte order (it's been swabbed) */
 566         LASSERT_REPSWABBED(open_req, 1);
 567
 568         OBD_ALLOC(mod, sizeof(*mod));
 569         if (mod == NULL) {
 570                 DEBUG_REQ(D_ERROR, open_req, "can't allocate mdc_open_data");
 571                 return 0;
 572         }
 573
 574         och->och_mod = mod;
 575         mod->mod_och = och;
 576         mod->mod_open_req = ptlrpc_request_addref(open_req);
 577
 578         memcpy(&rec->cr_replayid, &body->id1, sizeof rec->cr_replayid);
 579         open_req->rq_replay_cb = mdc_replay_open;
 580         open_req->rq_commit_cb = mdc_commit_open;
 581         open_req->rq_cb_data = mod;
 582         DEBUG_REQ(D_HA, open_req, "set up replay data");
 583         return 0;
 584 }
 585
 586 int mdc_clear_open_replay_data(struct obd_export *exp,
 587                                struct obd_client_handle *och)
 588 {
 589         struct mdc_open_data *mod = och->och_mod;
 590
 591         /* Don't free the structure now (it happens in mdc_commit_open, after
 592          * we're sure we won't need to fix up the close request in the future),
 593          * but make sure that replay doesn't poke at the och, which is about to
 594          * be freed. */
 595         LASSERT(mod != LP_POISON);
 596         if (mod != NULL)
 597                 mod->mod_och = NULL;
 598         och->och_mod = NULL;
 599         return 0;
 600 }
 601
 602 static void mdc_commit_close(struct ptlrpc_request *req)
 603 {
 604         struct mdc_open_data *mod = req->rq_cb_data;
 605         struct ptlrpc_request *open_req;
 606         struct obd_import *imp = req->rq_import;
 607
 608         DEBUG_REQ(D_HA, req, "close req committed");
 609         if (mod == NULL)
 610                 return;
 611
 612         mod->mod_close_req = NULL;
 613         req->rq_cb_data = NULL;
 614         req->rq_commit_cb = NULL;
 615
 616         open_req = mod->mod_open_req;
 617         LASSERT(open_req != NULL);
 618         LASSERT(open_req != LP_POISON);
 619         LASSERT(open_req->rq_type != LI_POISON);
 620
 621         DEBUG_REQ(D_HA, open_req, "open req balanced");
 622         if (open_req->rq_transno == 0) {
 623                 DEBUG_REQ(D_ERROR, open_req, "BUG 3892  open");
 624                 DEBUG_REQ(D_ERROR, req, "BUG 3892 close");
 625                 LASSERTF(open_req->rq_transno != 0, "BUG 3892\n");
 626         }
 627         LASSERT(open_req->rq_import == imp);
 628
 629         /* We no longer want to preserve this for transno-unconditional
 630          * replay. */
 631         spin_lock(&open_req->rq_lock);
 632         open_req->rq_replay = 0;
 633         spin_unlock(&open_req->rq_lock);
 634 }
 635
 636 int mdc_close(struct obd_export *exp, struct obdo *oa,
 637               struct obd_client_handle *och,
 638               struct ptlrpc_request **request)
 639 {
 640         struct obd_device *obd = class_exp2obd(exp);
 641         struct obd_import *imp = class_exp2cliimp(exp);
 642         int reqsize[3] = {0, sizeof(struct mds_body),
 643                           obd->u.cli.cl_max_mds_cookiesize};
 644         int rc, repsize[3] = {sizeof(struct mds_body),
 645                               obd->u.cli.cl_max_mds_easize,
 646                               obd->u.cli.cl_max_mds_cookiesize};
 647         struct ptlrpc_request *req;
 648         struct mdc_open_data *mod;
 649         ENTRY;
 650
 651         if (imp->imp_connection == NULL) {
 652                 CERROR("request on not connected import %s\n",
 653                         imp->imp_obd->obd_name);
 654                 RETURN(-EIO);
 655         }
 656
 657         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 658                               MDS_CLOSE, 3, reqsize, NULL);
 659         if (req == NULL)
 660                 GOTO(out, rc = -ENOMEM);
 661
 662         //reqsize[0] = lustre_secdesc_size();
 663         //lustre_pack_secdesc(req, reqsize[0]);
 664
 665         /* Ensure that this close's handle is fixed up during replay. */
 666         LASSERT(och != NULL);
 667         mod = och->och_mod;
 668         if (likely(mod != NULL)) {
 669                 mod->mod_close_req = req;
 670                 LASSERT(mod->mod_open_req->rq_type != LI_POISON);
 671                 DEBUG_REQ(D_HA, mod->mod_open_req, "matched open");
 672         } else {
 673                 CDEBUG(D_HA, "couldn't find open req; "
 674                        "expecting close error\n");
 675         }
 676
 677         mdc_close_pack(req, 1, oa, oa->o_valid, och);
 678
 679         req->rq_replen = lustre_msg_size(3, repsize);
 680         req->rq_commit_cb = mdc_commit_close;
 681         LASSERT(req->rq_cb_data == NULL);
 682         req->rq_cb_data = mod;
 683
 684         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 685         rc = ptlrpc_queue_wait(req);
 686         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 687
 688         if (req->rq_repmsg == NULL) {
 689                 CDEBUG(D_HA, "request failed to send: %p, %d\n", req,
 690                        req->rq_status);
 691                 if (rc == 0)
 692                         rc = req->rq_status ? req->rq_status : -EIO;
 693         } else if (rc == 0) {
 694                 rc = req->rq_repmsg->status;
 695                 if (req->rq_repmsg->type == PTL_RPC_MSG_ERR) {
 696                         DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, "
 697                                   "err = %d", rc);
 698                         if (rc > 0)
 699                                 rc = -rc;
 700                 } else {
 701                         if (mod == NULL)
 702                                 CERROR("Unexpected: can't find mdc_open_data, but "
 703                                        "close succeeded. Please tell CFS.\n");
 704                         if (!lustre_swab_repbuf(req, 0, sizeof(struct mds_body),
 705                                                 lustre_swab_mds_body))
 706                         {
 707                                 CERROR("Error unpacking mds_body\n");
 708                                 rc = -EPROTO;
 709                         }
 710                 }
 711         }
 712
 713         EXIT;
 714  out:
 715         *request = req;
 716         return rc;
 717 }
 718
 719 int mdc_done_writing(struct obd_export *exp, struct obdo *obdo)
 720 {
 721         struct ptlrpc_request *req;
 722         struct mds_body *body;
 723         int rc, size[2] = {0, sizeof(*body)};
 724         ENTRY;
 725
 726         size[0] = lustre_secdesc_size();
 727
 728         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 729                               MDS_DONE_WRITING, 2, size, NULL);
 730         if (req == NULL)
 731                 RETURN(-ENOMEM);
 732
 733         lustre_pack_secdesc(req, size[0]);
 734
 735         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF,
 736                               sizeof(*body));
 737
 738         mdc_pack_id(&body->id1, obdo->o_id, 0, obdo->o_mode,
 739                     obdo->o_mds, obdo->o_fid);
 740
 741         body->size = obdo->o_size;
 742         body->blocks = obdo->o_blocks;
 743         body->flags = obdo->o_flags;
 744         body->valid = obdo->o_valid;
 745
 746         req->rq_replen = lustre_msg_size(1, &size[1]);
 747
 748         rc = ptlrpc_queue_wait(req);
 749         ptlrpc_req_finished(req);
 750         RETURN(rc);
 751 }
 752
 753 int mdc_readpage(struct obd_export *exp,
 754                  struct lustre_id *id,
 755                  __u64 offset, struct page *page,
 756                  struct ptlrpc_request **request)
 757 {
 758         struct obd_import *imp = class_exp2cliimp(exp);
 759         struct ptlrpc_request *req = NULL;
 760         struct ptlrpc_bulk_desc *desc = NULL;
 761         struct mds_body *body;
 762         int rc, size[2] = {0, sizeof(*body)};
 763         ENTRY;
 764
 765         CDEBUG(D_INODE, "inode: %ld\n", (long)id->li_stc.u.e3s.l3s_ino);
 766
 767         size[0] = lustre_secdesc_size();
 768
 769         req = ptlrpc_prep_req(imp, LUSTRE_MDS_VERSION, MDS_READPAGE,
 770                               2, size, NULL);
 771         if (req == NULL)
 772                 GOTO(out, rc = -ENOMEM);
 773         /* XXX FIXME bug 249 */
 774         req->rq_request_portal = MDS_READPAGE_PORTAL;
 775
 776         lustre_pack_secdesc(req, size[0]);
 777
 778         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_PUT_SINK, MDS_BULK_PORTAL);
 779         if (desc == NULL)
 780                 GOTO(out, rc = -ENOMEM);
 781         /* NB req now owns desc and will free it when it gets freed */
 782
 783         ptlrpc_prep_bulk_page(desc, page, 0, PAGE_CACHE_SIZE);
 784         mdc_readdir_pack(req, 1, offset, PAGE_CACHE_SIZE, id);
 785
 786         req->rq_replen = lustre_msg_size(1, &size[1]);
 787         rc = ptlrpc_queue_wait(req);
 788
 789         if (rc == 0) {
 790                 body = lustre_swab_repbuf(req, 0, sizeof (*body),
 791                                           lustre_swab_mds_body);
 792                 if (body == NULL) {
 793                         CERROR("Can't unpack mds_body\n");
 794                         GOTO(out, rc = -EPROTO);
 795                 }
 796
 797                 if (req->rq_bulk->bd_nob_transferred != PAGE_CACHE_SIZE) {
 798                         CERROR ("Unexpected # bytes transferred: %d"
 799                                 " (%ld expected)\n",
 800                                 req->rq_bulk->bd_nob_transferred,
 801                                 PAGE_CACHE_SIZE);
 802                         GOTO (out, rc = -EPROTO);
 803                 }
 804         }
 805
 806         EXIT;
 807  out:
 808         *request = req;
 809         return rc;
 810 }
 811
 812 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 813                          void *karg, void *uarg)
 814 {
 815         struct obd_device *obd = exp->exp_obd;
 816         struct obd_ioctl_data *data = karg;
 817         struct obd_import *imp = obd->u.cli.cl_import;
 818         struct llog_ctxt *ctxt;
 819         int rc;
 820         ENTRY;
 821
 822 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 823         MOD_INC_USE_COUNT;
 824 #else
 825         if (!try_module_get(THIS_MODULE)) {
 826                 CERROR("Can't get module. Is it alive?");
 827                 return -EINVAL;
 828         }
 829 #endif
 830         switch (cmd) {
 831         case OBD_IOC_CLIENT_RECOVER:
 832                 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1);
 833                 if (rc < 0)
 834                         GOTO(out, rc);
 835                 GOTO(out, rc = 0);
 836         case IOC_OSC_SET_ACTIVE:
 837                 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
 838                 GOTO(out, rc);
 839         case IOC_OSC_CTL_RECOVERY:
 840                 rc = ptlrpc_import_control_recovery(imp, data->ioc_offset);
 841                 GOTO(out, rc);
 842         case OBD_IOC_PARSE: {
 843                 ctxt = llog_get_context(&exp->exp_obd->obd_llogs,
 844                                         LLOG_CONFIG_REPL_CTXT);
 845                 rc = class_config_process_llog(ctxt, data->ioc_inlbuf1, NULL);
 846                 GOTO(out, rc);
 847         }
 848 #ifdef __KERNEL__
 849         case OBD_IOC_LLOG_INFO:
 850         case OBD_IOC_LLOG_PRINT: {
 851                 ctxt = llog_get_context(&obd->obd_llogs, LLOG_CONFIG_REPL_CTXT);
 852                 rc = llog_ioctl(ctxt, cmd, data);
 853
 854                 GOTO(out, rc);
 855         }
 856 #endif
 857         default:
 858                 CERROR("mdc_ioctl(): unrecognised ioctl %#x\n", cmd);
 859                 GOTO(out, rc = -ENOTTY);
 860         }
 861 out:
 862 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 863         MOD_DEC_USE_COUNT;
 864 #else
 865         module_put(THIS_MODULE);
 866 #endif
 867
 868         return rc;
 869 }
 870
 871 int mdc_set_info(struct obd_export *exp, obd_count keylen,
 872                  void *key, obd_count vallen, void *val)
 873 {
 874         int rc = -EINVAL;
 875
 876         if (keylen == strlen("initial_recov") &&
 877             memcmp(key, "initial_recov", strlen("initial_recov")) == 0) {
 878                 struct obd_import *imp = exp->exp_obd->u.cli.cl_import;
 879                 if (vallen != sizeof(int))
 880                         RETURN(-EINVAL);
 881                 imp->imp_initial_recov = *(int *)val;
 882                 CDEBUG(D_HA, "%s: set imp_no_init_recov = %d\n",
 883                        exp->exp_obd->obd_name,
 884                        imp->imp_initial_recov);
 885                 RETURN(0);
 886         } else if ((keylen >= strlen("crypto_type")) &&
 887                     strcmp(key, "crypto_type") == 0) {
 888                 struct ptlrpc_request *req;
 889                 char *bufs[2] = {key, val};
 890                 int rc, size[2] = {keylen, vallen};
 891
 892                 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
 893                                       OST_SET_INFO, 2, size, bufs);
 894                 if (req == NULL)
 895                         RETURN(-ENOMEM);
 896
 897                 req->rq_replen = lustre_msg_size(0, NULL);
 898                 rc = ptlrpc_queue_wait(req);
 899                 ptlrpc_req_finished(req);
 900                 RETURN(rc);
 901         } else if (keylen >= strlen("inter_mds") && strcmp(key, "inter_mds") == 0) {
 902                 struct obd_import *imp = class_exp2cliimp(exp);
 903                 imp->imp_server_timeout = 1;
 904                 CDEBUG(D_OTHER, "%s: timeout / 2\n", exp->exp_obd->obd_name);
 905                 RETURN(0);
 906         } else if (keylen == strlen("sec") &&
 907                    memcmp(key, "sec", keylen) == 0) {
 908                 struct client_obd *cli = &exp->exp_obd->u.cli;
 909
 910                 cli->cl_sec_flavor = ptlrpcs_name2flavor(val);
 911                 if (cli->cl_sec_flavor == PTLRPCS_FLVR_INVALID) {
 912                         CERROR("unrecognized security type %s\n", (char*) val);
 913                         RETURN(-EINVAL);
 914                 }
 915
 916                 RETURN(0);
 917         } else if (keylen == strlen("sec_flags") &&
 918                    memcmp(key, "sec_flags", keylen) == 0) {
 919                 struct client_obd *cli = &exp->exp_obd->u.cli;
 920
 921                 cli->cl_sec_flags = *((unsigned long *) val);
 922                 RETURN(0);
 923         } else if (keylen == strlen("flush_cred") &&
 924                    memcmp(key, "flush_cred", keylen) == 0) {
 925                 struct client_obd *cli = &exp->exp_obd->u.cli;
 926
 927                 if (cli->cl_import)
 928                         ptlrpcs_import_flush_current_creds(cli->cl_import);
 929                 RETURN(0);
 930         } else if (keylen == strlen("async") && memcmp(key, "async", keylen) == 0) {
 931                 struct client_obd *cl = &exp->exp_obd->u.cli;
 932                 if (vallen != sizeof(int))
 933                         RETURN(-EINVAL);
 934                 cl->cl_async = *(int *)val;
 935                 CDEBUG(D_HA, "%s: set async = %d\n",
 936                        exp->exp_obd->obd_name, cl->cl_async);
 937                 RETURN(0);
 938         }
 939         RETURN(rc);
 940 }
 941
 942 static int mdc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
 943                       unsigned long max_age)
 944 {
 945         struct obd_statfs *msfs;
 946         struct ptlrpc_request *req;
 947         int rc, size = sizeof(*msfs);
 948         ENTRY;
 949
 950         /* We could possibly pass max_age in the request (as an absolute
 951          * timestamp or a "seconds.usec ago") so the target can avoid doing
 952          * extra calls into the filesystem if that isn't necessary (e.g.
 953          * during mount that would help a bit).  Having relative timestamps
 954          * is not so great if request processing is slow, while absolute
 955          * timestamps are not ideal because they need time synchronization. */
 956         req = ptlrpc_prep_req(obd->u.cli.cl_import, LUSTRE_MDS_VERSION,
 957                               MDS_STATFS, 0, NULL, NULL);
 958         if (!req)
 959                 RETURN(-ENOMEM);
 960
 961         req->rq_replen = lustre_msg_size(1, &size);
 962
 963         mdc_get_rpc_lock(obd->u.cli.cl_rpc_lock, NULL);
 964         rc = ptlrpc_queue_wait(req);
 965         mdc_put_rpc_lock(obd->u.cli.cl_rpc_lock, NULL);
 966
 967         if (rc) {
 968                 /* this can be LMV fake import, whcih is not connected. */
 969                 if (!req->rq_import->imp_connection)
 970                         memset(osfs, 0, sizeof(*osfs));
 971                 GOTO(out, rc);
 972         }
 973
 974         msfs = lustre_swab_repbuf(req, 0, sizeof(*msfs),
 975                                   lustre_swab_obd_statfs);
 976         if (msfs == NULL) {
 977                 CERROR("Can't unpack obd_statfs\n");
 978                 GOTO(out, rc = -EPROTO);
 979         }
 980
 981         memcpy(osfs, msfs, sizeof (*msfs));
 982         EXIT;
 983 out:
 984         ptlrpc_req_finished(req);
 985         return rc;
 986 }
 987
 988 static int mdc_pin(struct obd_export *exp, obd_id ino, __u32 gen, int type,
 989                    struct obd_client_handle *handle, int flag)
 990 {
 991         struct ptlrpc_request *req;
 992         struct mds_body *body;
 993         int rc, size[2] = {0, sizeof(*body)};
 994         ENTRY;
 995
 996         //size[0] = lustre_secdesc_size();
 997
 998         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 999                               MDS_PIN, 2, size, NULL);
1000         if (req == NULL)
1001                 RETURN(-ENOMEM);
1002
1003         //lustre_pack_secdesc(req, size[0]);
1004
1005         body = lustre_msg_buf(req->rq_reqmsg,
1006                               MDS_REQ_REC_OFF, sizeof(*body));
1007
1008         /* FIXME-UMKA: here should be also mdsnum and fid. */
1009         mdc_pack_id(&body->id1, ino, gen, type, 0, 0);
1010         body->flags = flag;
1011
1012         req->rq_replen = lustre_msg_size(1, &size[1]);
1013
1014         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1015         rc = ptlrpc_queue_wait(req);
1016         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1017         if (rc) {
1018                 CERROR("pin failed: %d\n", rc);
1019                 ptlrpc_req_finished(req);
1020                 RETURN(rc);
1021         }
1022
1023         body = lustre_swab_repbuf(req, 0, sizeof(*body), lustre_swab_mds_body);
1024         if (body == NULL) {
1025                 ptlrpc_req_finished(req);
1026                 RETURN(rc);
1027         }
1028
1029         memcpy(&handle->och_fh, &body->handle, sizeof(body->handle));
1030         handle->och_magic = OBD_CLIENT_HANDLE_MAGIC;
1031
1032         OBD_ALLOC(handle->och_mod, sizeof(*handle->och_mod));
1033         if (handle->och_mod == NULL) {
1034                 DEBUG_REQ(D_ERROR, req, "can't allocate mdc_open_data");
1035                 RETURN(-ENOMEM);
1036         }
1037         handle->och_mod->mod_open_req = req; /* will be dropped by unpin */
1038
1039         RETURN(rc);
1040 }
1041
1042 static int mdc_unpin(struct obd_export *exp,
1043                      struct obd_client_handle *handle, int flag)
1044 {
1045         struct ptlrpc_request *req;
1046         struct mds_body *body;
1047         int rc, size[2] = {0, sizeof(*body)};
1048         ENTRY;
1049
1050         if (handle->och_magic != OBD_CLIENT_HANDLE_MAGIC)
1051                 RETURN(0);
1052
1053         //size[0] = lustre_secdesc_size();
1054
1055         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
1056                               MDS_CLOSE, 2, size, NULL);
1057         if (req == NULL)
1058                 RETURN(-ENOMEM);
1059
1060         //lustre_pack_secdesc(req, size[0]);
1061
1062         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF, sizeof(*body));
1063         memcpy(&body->handle, &handle->och_fh, sizeof(body->handle));
1064         body->flags = flag;
1065
1066         req->rq_replen = lustre_msg_size(0, NULL);
1067         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1068         rc = ptlrpc_queue_wait(req);
1069         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1070
1071         if (rc != 0)
1072                 CERROR("unpin failed: %d\n", rc);
1073
1074         ptlrpc_req_finished(req);
1075         ptlrpc_req_finished(handle->och_mod->mod_open_req);
1076         OBD_FREE(handle->och_mod, sizeof(*handle->och_mod));
1077         RETURN(rc);
1078 }
1079
1080 int mdc_sync(struct obd_export *exp, struct lustre_id *id,
1081              struct ptlrpc_request **request)
1082 {
1083         struct ptlrpc_request *req;
1084         struct mds_body *body;
1085         int size[2] = {0, sizeof(*body)};
1086         int rc;
1087         ENTRY;
1088
1089         //size[0] = lustre_secdesc_size();
1090
1091         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
1092                               MDS_SYNC, 2, size, NULL);
1093         if (!req)
1094                 RETURN(rc = -ENOMEM);
1095
1096         //lustre_pack_secdesc(req, size[0]);
1097
1098         if (id) {
1099                 body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF,
1100                                       sizeof (*body));
1101                 memcpy(&body->id1, id, sizeof(*id));
1102         }
1103
1104         req->rq_replen = lustre_msg_size(1, &size[1]);
1105
1106         rc = ptlrpc_queue_wait(req);
1107         if (rc || request == NULL)
1108                 ptlrpc_req_finished(req);
1109         else
1110                 *request = req;
1111
1112         RETURN(rc);
1113 }
1114
1115 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
1116                             enum obd_import_event event)
1117 {
1118         int rc = 0;
1119
1120         LASSERT(imp->imp_obd == obd);
1121
1122         switch (event) {
1123         case IMP_EVENT_DISCON: {
1124                 break;
1125         }
1126         case IMP_EVENT_INACTIVE: {
1127                 if (obd->obd_observer)
1128                         rc = obd_notify(obd->obd_observer, obd, 0, 0);
1129                 break;
1130         }
1131         case IMP_EVENT_INVALIDATE: {
1132                 struct ldlm_namespace *ns = obd->obd_namespace;
1133
1134                 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
1135
1136                 break;
1137         }
1138         case IMP_EVENT_ACTIVE: {
1139                 if (obd->obd_observer)
1140                         rc = obd_notify(obd->obd_observer, obd, 1, 0);
1141                 break;
1142         }
1143         default:
1144                 CERROR("Unknown import event %d\n", event);
1145                 LBUG();
1146         }
1147         RETURN(rc);
1148 }
1149
1150 static int mdc_attach(struct obd_device *dev, obd_count len, void *data)
1151 {
1152         struct lprocfs_static_vars lvars;
1153
1154         lprocfs_init_vars(mdc, &lvars);
1155         return lprocfs_obd_attach(dev, lvars.obd_vars);
1156 }
1157
1158 static int mdc_detach(struct obd_device *dev)
1159 {
1160         return lprocfs_obd_detach(dev);
1161 }
1162
1163 static int mdc_setup(struct obd_device *obd, obd_count len, void *buf)
1164 {
1165         struct client_obd *cli = &obd->u.cli;
1166         int rc;
1167         ENTRY;
1168
1169         OBD_ALLOC(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1170         if (!cli->cl_rpc_lock)
1171                 RETURN(-ENOMEM);
1172         mdc_init_rpc_lock(cli->cl_rpc_lock);
1173
1174         ptlrpcd_addref();
1175
1176         OBD_ALLOC(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1177         if (!cli->cl_setattr_lock)
1178                 GOTO(err_rpc_lock, rc = -ENOMEM);
1179         mdc_init_rpc_lock(cli->cl_setattr_lock);
1180
1181         OBD_ALLOC(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1182         if (!cli->cl_close_lock)
1183                 GOTO(err_setattr_lock, rc = -ENOMEM);
1184         mdc_init_rpc_lock(cli->cl_close_lock);
1185
1186         rc = client_obd_setup(obd, len, buf);
1187         if (rc)
1188                 GOTO(err_close_lock, rc);
1189
1190         rc = obd_llog_init(obd, &obd->obd_llogs, obd, 0, NULL);
1191         if (rc) {
1192                 mdc_cleanup(obd, 0);
1193                 CERROR("failed to setup llogging subsystems\n");
1194         }
1195
1196         RETURN(rc);
1197
1198 err_close_lock:
1199         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1200 err_setattr_lock:
1201         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1202 err_rpc_lock:
1203         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1204         ptlrpcd_decref();
1205         RETURN(rc);
1206 }
1207
1208 static int mdc_init_ea_size(struct obd_export *exp, int easize, int cookiesize)
1209 {
1210         struct obd_device *obd = exp->exp_obd;
1211         struct client_obd *cli = &obd->u.cli;
1212         ENTRY;
1213
1214         if (cli->cl_max_mds_easize < easize)
1215                 cli->cl_max_mds_easize = easize;
1216         if (cli->cl_max_mds_cookiesize < cookiesize)
1217                 cli->cl_max_mds_cookiesize = cookiesize;
1218         RETURN(0);
1219 }
1220
1221 static int mdc_precleanup(struct obd_device *obd, int flags)
1222 {
1223         int rc = 0;
1224
1225         rc = obd_llog_finish(obd, &obd->obd_llogs, 0);
1226         if (rc != 0)
1227                 CERROR("failed to cleanup llogging subsystems\n");
1228
1229         RETURN(rc);
1230 }
1231
1232 static int mdc_cleanup(struct obd_device *obd, int flags)
1233 {
1234         struct client_obd *cli = &obd->u.cli;
1235
1236         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1237         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1238         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1239
1240         ptlrpcd_decref();
1241
1242         return client_obd_cleanup(obd, flags);
1243 }
1244
1245
1246 static int mdc_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
1247                          struct obd_device *tgt, int count,
1248                          struct llog_catid *logid)
1249 {
1250         struct llog_ctxt *ctxt;
1251         int rc;
1252         ENTRY;
1253
1254         rc = obd_llog_setup(obd, llogs, LLOG_CONFIG_REPL_CTXT, tgt, 0, NULL,
1255                             &llog_client_ops);
1256         if (rc == 0) {
1257                 ctxt = llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT);
1258                 ctxt->loc_imp = obd->u.cli.cl_import;
1259         }
1260
1261         RETURN(rc);
1262 }
1263
1264 static int mdc_llog_finish(struct obd_device *obd,
1265                            struct obd_llogs *llogs, int count)
1266 {
1267         int rc;
1268         ENTRY;
1269
1270         rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT));
1271         RETURN(rc);
1272 }
1273 static struct obd_device *mdc_get_real_obd(struct obd_export *exp,
1274                                            struct lustre_id *id)
1275 {
1276        ENTRY;
1277        RETURN(exp->exp_obd);
1278 }
1279
1280 static int mdc_get_info(struct obd_export *exp, __u32 keylen,
1281                         void *key, __u32 *valsize, void *val)
1282 {
1283         struct ptlrpc_request *req;
1284         char *bufs[1] = {key};
1285         int rc = 0;
1286         ENTRY;
1287
1288         if (!valsize || !val)
1289                 RETURN(-EFAULT);
1290
1291         if (keylen == strlen("remote_flag") && !strcmp(key, "remote_flag")) {
1292                 struct obd_import *imp;
1293                 struct obd_connect_data *data;
1294
1295                 imp = class_exp2cliimp(exp);
1296                 if (!imp) {
1297                         LBUG();
1298                         RETURN(-EINVAL);
1299                 }
1300
1301                 if (imp->imp_state != LUSTRE_IMP_FULL) {
1302                         CERROR("import state not full\n");
1303                         RETURN(-EINVAL);
1304                 }
1305
1306                 data = &imp->imp_connect_data;
1307                 if (data->ocd_connect_flags & OBD_CONNECT_REMOTE) {
1308                         *((int *)val) = 1;
1309                         RETURN(0);
1310                 } else if (data->ocd_connect_flags & OBD_CONNECT_LOCAL) {
1311                         *((int *)val) = 0;
1312                         RETURN(0);
1313                 }
1314                 CERROR("no remote flag set?\n");
1315                 RETURN(-EINVAL);
1316         }
1317
1318         if ((keylen < strlen("mdsize") || strcmp(key, "mdsize") != 0) &&
1319             (keylen < strlen("mdsnum") || strcmp(key, "mdsnum") != 0) &&
1320             (keylen < strlen("rootid") || strcmp(key, "rootid") != 0))
1321                 RETURN(-EPROTO);
1322
1323         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
1324                               OST_GET_INFO, 1, (int *)&keylen, bufs);
1325         if (req == NULL)
1326                 RETURN(-ENOMEM);
1327
1328         req->rq_replen = lustre_msg_size(1, (int *)valsize);
1329         rc = ptlrpc_queue_wait(req);
1330         if (rc)
1331                 GOTO(out_req, rc);
1332
1333         if (keylen >= strlen("rootid") && !strcmp(key, "rootid")) {
1334                 struct lustre_id *reply;
1335
1336                 reply = lustre_swab_repbuf(req, 0, sizeof(*reply),
1337                                            lustre_swab_lustre_id);
1338                 if (reply == NULL) {
1339                         CERROR("Can't unpack %s\n", (char *)key);
1340                         GOTO(out_req, rc = -EPROTO);
1341                 }
1342
1343                 *(struct lustre_id *)val = *reply;
1344         } else if (keylen >= strlen("lovdesc") && !strcmp(key, "lovdesc")) {
1345                 struct lov_desc *reply;
1346
1347                 reply = lustre_swab_repbuf(req, 0, sizeof(*reply),
1348                                            lustre_swab_lov_desc);
1349                 if (reply == NULL) {
1350                         CERROR("Can't unpack %s\n", (char *)key);
1351                         GOTO(out_req, rc = -EPROTO);
1352                 }
1353
1354                 *(struct lov_desc *)val = *reply;
1355                 RETURN(0);
1356         } else {
1357                 __u32 *reply;
1358
1359                 reply = lustre_swab_repbuf(req, 0, sizeof(*reply),
1360                                            lustre_swab_generic_32s);
1361                 if (reply == NULL) {
1362                         CERROR("Can't unpack %s\n", (char *)key);
1363                         GOTO(out_req, rc = -EPROTO);
1364                 }
1365                 *((__u32 *)val) = *reply;
1366         }
1367 out_req:
1368         ptlrpc_req_finished(req);
1369         RETURN(rc);
1370 }
1371
1372 int mdc_obj_create(struct obd_export *exp, struct obdo *oa,
1373                    void *acl, int acl_size,
1374                    struct lov_stripe_md **ea, struct obd_trans_info *oti)
1375 {
1376         struct ptlrpc_request *request;
1377         struct ost_body *body;
1378         char *acl_buf;
1379         int rc, size[2] = { sizeof(*body), acl_size };
1380         ENTRY;
1381
1382         LASSERT(oa);
1383
1384         request = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
1385                                   OST_CREATE, 2, size, NULL);
1386         if (!request)
1387                 GOTO(out_req, rc = -ENOMEM);
1388
1389         body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
1390         memcpy(&body->oa, oa, sizeof(body->oa));
1391
1392         if (acl_size) {
1393                 acl_buf = lustre_msg_buf(request->rq_reqmsg, 1, acl_size);
1394                 memcpy(acl_buf, acl, acl_size);
1395         }
1396
1397         request->rq_replen = lustre_msg_size(1, size);
1398         rc = ptlrpc_queue_wait(request);
1399         if (rc)
1400                 GOTO(out_req, rc);
1401
1402         body = lustre_swab_repbuf(request, 0, sizeof(*body),
1403                                   lustre_swab_ost_body);
1404         if (body == NULL) {
1405                 CERROR ("can't unpack ost_body\n");
1406                 GOTO (out_req, rc = -EPROTO);
1407         }
1408
1409         memcpy(oa, &body->oa, sizeof(*oa));
1410
1411         /* store ino/generation for recovery */
1412         body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
1413         body->oa.o_id = oa->o_id;
1414         body->oa.o_generation = oa->o_generation;
1415         body->oa.o_fid = oa->o_fid;
1416         body->oa.o_mds = oa->o_mds;
1417
1418         CDEBUG(D_HA, "transno: "LPD64"\n", request->rq_repmsg->transno);
1419         EXIT;
1420 out_req:
1421         ptlrpc_req_finished(request);
1422         return rc;
1423 }
1424
1425 int mdc_brw(int rw, struct obd_export *exp, struct obdo *oa,
1426             struct lov_stripe_md *ea, obd_count oa_bufs,
1427             struct brw_page *pgarr, struct obd_trans_info *oti)
1428 {
1429         struct ptlrpc_bulk_desc *desc;
1430         struct niobuf_remote *niobuf;
1431         struct ptlrpc_request *req;
1432         struct obd_ioobj *ioobj;
1433         struct ost_body *body;
1434         int err, opc, i;
1435         int size[3];
1436
1437         opc = ((rw & OBD_BRW_WRITE) != 0) ? OST_WRITE : OST_READ;
1438
1439         size[0] = sizeof(*body);
1440         size[1] = sizeof(*ioobj);
1441         size[2] = oa_bufs * sizeof(*niobuf);
1442
1443         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION, opc,
1444                               3, size, NULL);
1445         LASSERT(req != NULL);
1446
1447         if (opc == OST_WRITE)
1448                 desc = ptlrpc_prep_bulk_imp(req, oa_bufs, BULK_GET_SOURCE,
1449                                             OST_BULK_PORTAL);
1450         else
1451                 desc = ptlrpc_prep_bulk_imp(req, oa_bufs, BULK_PUT_SINK,
1452                                             OST_BULK_PORTAL);
1453         LASSERT(desc != NULL);
1454
1455         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
1456         ioobj = lustre_msg_buf(req->rq_reqmsg, 1, sizeof(*ioobj));
1457         niobuf = lustre_msg_buf(req->rq_reqmsg, 2, oa_bufs * sizeof(*niobuf));
1458
1459         memcpy(&body->oa, oa, sizeof(*oa));
1460         obdo_to_ioobj(oa, ioobj);
1461         ioobj->ioo_bufcnt = oa_bufs;
1462
1463         for (i = 0; i < oa_bufs; i++, niobuf++) {
1464                 struct brw_page *pg = &pgarr[i];
1465
1466                 LASSERT(pg->count > 0);
1467                 LASSERT((pg->disk_offset & ~PAGE_MASK) + pg->count <= PAGE_SIZE);
1468
1469                 ptlrpc_prep_bulk_page(desc, pg->pg, pg->disk_offset & ~PAGE_MASK,
1470                                       pg->count);
1471
1472                 niobuf->offset = pg->disk_offset;
1473                 niobuf->len = pg->count;
1474                 niobuf->flags = pg->flag;
1475         }
1476
1477         /* size[0] still sizeof (*body) */
1478         if (opc == OST_WRITE) {
1479                 /* 1 RC per niobuf */
1480                 size[1] = sizeof(__u32) * oa_bufs;
1481                 req->rq_replen = lustre_msg_size(2, size);
1482         } else {
1483                 /* 1 RC for the whole I/O */
1484                 req->rq_replen = lustre_msg_size(1, size);
1485         }
1486         err = ptlrpc_queue_wait(req);
1487         LASSERT(err == 0);
1488
1489         ptlrpc_req_finished(req);
1490         return 0;
1491 }
1492
1493 static int mdc_valid_attrs(struct obd_export *exp,
1494                            struct lustre_id *id)
1495 {
1496         struct ldlm_res_id res_id = { .name = {0} };
1497         struct obd_device *obd = exp->exp_obd;
1498         struct lustre_handle lockh;
1499         ldlm_policy_data_t policy;
1500         int flags;
1501         ENTRY;
1502
1503         res_id.name[0] = id_fid(id);
1504         res_id.name[1] = id_group(id);
1505         policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1506
1507         CDEBUG(D_INFO, "trying to match res "LPU64"\n",
1508                res_id.name[0]);
1509
1510         /* FIXME use LDLM_FL_TEST_LOCK instead */
1511         flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING;
1512         if (ldlm_lock_match(obd->obd_namespace, flags, &res_id,
1513                             LDLM_IBITS, &policy, LCK_PR, &lockh)) {
1514                 ldlm_lock_decref(&lockh, LCK_PR);
1515                 RETURN(1);
1516         }
1517
1518         if (ldlm_lock_match(obd->obd_namespace, flags, &res_id,
1519                             LDLM_IBITS, &policy, LCK_PW, &lockh)) {
1520                 ldlm_lock_decref(&lockh, LCK_PW);
1521                 RETURN(1);
1522         }
1523         RETURN(0);
1524 }
1525
1526 static int mdc_change_cbdata_name(struct obd_export *exp,
1527                                   struct lustre_id *pid,
1528                                   char *name, int len,
1529                                   struct lustre_id *cid,
1530                                   ldlm_iterator_t it, void *data)
1531 {
1532         int rc;
1533         rc = mdc_change_cbdata(exp, cid, it, data);
1534         RETURN(rc);
1535 }
1536
1537 struct obd_ops mdc_obd_ops = {
1538         .o_owner         = THIS_MODULE,
1539         .o_attach        = mdc_attach,
1540         .o_detach        = mdc_detach,
1541         .o_setup         = mdc_setup,
1542         .o_precleanup    = mdc_precleanup,
1543         .o_cleanup       = mdc_cleanup,
1544         .o_add_conn      = client_import_add_conn,
1545         .o_del_conn      = client_import_del_conn,
1546         .o_connect       = client_connect_import,
1547         .o_disconnect    = client_disconnect_export,
1548         .o_iocontrol     = mdc_iocontrol,
1549         .o_packmd        = mdc_packmd,
1550         .o_unpackmd      = mdc_unpackmd,
1551         .o_statfs        = mdc_statfs,
1552         .o_pin           = mdc_pin,
1553         .o_unpin         = mdc_unpin,
1554         .o_import_event  = mdc_import_event,
1555         .o_llog_init     = mdc_llog_init,
1556         .o_llog_finish   = mdc_llog_finish,
1557         .o_create        = mdc_obj_create,
1558         .o_set_info      = mdc_set_info,
1559         .o_get_info      = mdc_get_info,
1560         .o_brw           = mdc_brw,
1561         .o_cancel_unused = mdc_cancel_unused,
1562         .o_init_ea_size  = mdc_init_ea_size,
1563 };
1564
1565 struct md_ops mdc_md_ops = {
1566         .m_getstatus     = mdc_getstatus,
1567         .m_getattr       = mdc_getattr,
1568         .m_close         = mdc_close,
1569         .m_create        = mdc_create,
1570         .m_done_writing  = mdc_done_writing,
1571         .m_enqueue       = mdc_enqueue,
1572         .m_getattr_lock  = mdc_getattr_lock,
1573         .m_intent_lock   = mdc_intent_lock,
1574         .m_link          = mdc_link,
1575         .m_rename        = mdc_rename,
1576         .m_setattr       = mdc_setattr,
1577         .m_sync          = mdc_sync,
1578         .m_readpage      = mdc_readpage,
1579         .m_unlink        = mdc_unlink,
1580         .m_valid_attrs   = mdc_valid_attrs,
1581         .m_req2lustre_md = mdc_req2lustre_md,
1582         .m_set_open_replay_data   = mdc_set_open_replay_data,
1583         .m_clear_open_replay_data = mdc_clear_open_replay_data,
1584         .m_store_inode_generation = mdc_store_inode_generation,
1585         .m_set_lock_data = mdc_set_lock_data,
1586         .m_get_real_obd  = mdc_get_real_obd,
1587         .m_change_cbdata_name = mdc_change_cbdata_name,
1588         .m_change_cbdata = mdc_change_cbdata,
1589         .m_access_check  = mdc_access_check,
1590 };
1591
1592 int __init mdc_init(void)
1593 {
1594         struct lprocfs_static_vars lvars;
1595
1596         lprocfs_init_vars(mdc, &lvars);
1597         return class_register_type(&mdc_obd_ops, &mdc_md_ops,
1598                                    lvars.module_vars, OBD_MDC_DEVICENAME);
1599 }
1600
1601 #ifdef __KERNEL__
1602 static void /*__exit*/ mdc_exit(void)
1603 {
1604         class_unregister_type(OBD_MDC_DEVICENAME);
1605 }
1606
1607 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1608 MODULE_DESCRIPTION("Lustre Metadata Client");
1609 MODULE_LICENSE("GPL");
1610
1611 EXPORT_SYMBOL(mdc_req2lustre_md);
1612 EXPORT_SYMBOL(mdc_change_cbdata);
1613 EXPORT_SYMBOL(mdc_getstatus);
1614 EXPORT_SYMBOL(mdc_getattr);
1615 EXPORT_SYMBOL(mdc_getattr_lock);
1616 EXPORT_SYMBOL(mdc_create);
1617 EXPORT_SYMBOL(mdc_unlink);
1618 EXPORT_SYMBOL(mdc_rename);
1619 EXPORT_SYMBOL(mdc_link);
1620 EXPORT_SYMBOL(mdc_readpage);
1621 EXPORT_SYMBOL(mdc_setattr);
1622 EXPORT_SYMBOL(mdc_close);
1623 EXPORT_SYMBOL(mdc_done_writing);
1624 EXPORT_SYMBOL(mdc_sync);
1625 EXPORT_SYMBOL(mdc_set_open_replay_data);
1626 EXPORT_SYMBOL(mdc_clear_open_replay_data);
1627 EXPORT_SYMBOL(mdc_store_inode_generation);
1628
1629 module_init(mdc_init);
1630 module_exit(mdc_exit);
1631 #endif