lustre/cmm/cmm_device.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/cmm/cmm_device.c
  37  *
  38  * Lustre Cluster Metadata Manager (cmm)
  39  *
  40  * Author: Mike Pershin <tappro@clusterfs.com>
  41  */
  42
  43 #ifndef EXPORT_SYMTAB
  44 # define EXPORT_SYMTAB
  45 #endif
  46 #define DEBUG_SUBSYSTEM S_MDS
  47
  48 #include <linux/module.h>
  49
  50 #include <obd.h>
  51 #include <obd_class.h>
  52 #include <lprocfs_status.h>
  53 #include <lustre_ver.h>
  54 #include "cmm_internal.h"
  55 #include "mdc_internal.h"
  56 #ifdef HAVE_QUOTA_SUPPORT
  57 # include <lustre_quota.h>
  58 #endif
  59
  60 static struct obd_ops cmm_obd_device_ops = {
  61         .o_owner           = THIS_MODULE
  62 };
  63
  64 static const struct lu_device_operations cmm_lu_ops;
  65
  66 static inline int lu_device_is_cmm(struct lu_device *d)
  67 {
  68         return ergo(d != NULL && d->ld_ops != NULL, d->ld_ops == &cmm_lu_ops);
  69 }
  70
  71 int cmm_root_get(const struct lu_env *env, struct md_device *md,
  72                  struct lu_fid *fid)
  73 {
  74         struct cmm_device *cmm_dev = md2cmm_dev(md);
  75         /* valid only on master MDS */
  76         if (cmm_dev->cmm_local_num == 0)
  77                 return cmm_child_ops(cmm_dev)->mdo_root_get(env,
  78                                      cmm_dev->cmm_child, fid);
  79         else
  80                 return -EINVAL;
  81 }
  82
  83 static int cmm_statfs(const struct lu_env *env, struct md_device *md,
  84                       struct kstatfs *sfs)
  85 {
  86         struct cmm_device *cmm_dev = md2cmm_dev(md);
  87         int rc;
  88
  89         ENTRY;
  90         rc = cmm_child_ops(cmm_dev)->mdo_statfs(env,
  91                                                 cmm_dev->cmm_child, sfs);
  92         RETURN (rc);
  93 }
  94
  95 static int cmm_maxsize_get(const struct lu_env *env, struct md_device *md,
  96                            int *md_size, int *cookie_size)
  97 {
  98         struct cmm_device *cmm_dev = md2cmm_dev(md);
  99         int rc;
 100         ENTRY;
 101         rc = cmm_child_ops(cmm_dev)->mdo_maxsize_get(env, cmm_dev->cmm_child,
 102                                                      md_size, cookie_size);
 103         RETURN(rc);
 104 }
 105
 106 static int cmm_init_capa_ctxt(const struct lu_env *env, struct md_device *md,
 107                               int mode , unsigned long timeout, __u32 alg,
 108                               struct lustre_capa_key *keys)
 109 {
 110         struct cmm_device *cmm_dev = md2cmm_dev(md);
 111         int rc;
 112         ENTRY;
 113         LASSERT(cmm_child_ops(cmm_dev)->mdo_init_capa_ctxt);
 114         rc = cmm_child_ops(cmm_dev)->mdo_init_capa_ctxt(env, cmm_dev->cmm_child,
 115                                                         mode, timeout, alg,
 116                                                         keys);
 117         RETURN(rc);
 118 }
 119
 120 static int cmm_update_capa_key(const struct lu_env *env,
 121                                struct md_device *md,
 122                                struct lustre_capa_key *key)
 123 {
 124         struct cmm_device *cmm_dev = md2cmm_dev(md);
 125         int rc;
 126         ENTRY;
 127         rc = cmm_child_ops(cmm_dev)->mdo_update_capa_key(env,
 128                                                          cmm_dev->cmm_child,
 129                                                          key);
 130         RETURN(rc);
 131 }
 132
 133 #ifdef HAVE_QUOTA_SUPPORT
 134 static int cmm_quota_notify(const struct lu_env *env, struct md_device *m)
 135 {
 136         struct cmm_device *cmm_dev = md2cmm_dev(m);
 137         int rc;
 138         ENTRY;
 139
 140         /* disable quota for CMD case temporary. */
 141         if (cmm_dev->cmm_tgt_count)
 142                 RETURN(-EOPNOTSUPP);
 143
 144         rc = cmm_child_ops(cmm_dev)->mdo_quota.mqo_notify(env,
 145                                                           cmm_dev->cmm_child);
 146         RETURN(rc);
 147 }
 148
 149 static int cmm_quota_setup(const struct lu_env *env, struct md_device *m,
 150                            void *data)
 151 {
 152         struct cmm_device *cmm_dev = md2cmm_dev(m);
 153         int rc;
 154         ENTRY;
 155
 156         /* disable quota for CMD case temporary. */
 157         if (cmm_dev->cmm_tgt_count)
 158                 RETURN(-EOPNOTSUPP);
 159
 160         rc = cmm_child_ops(cmm_dev)->mdo_quota.mqo_setup(env,
 161                                                          cmm_dev->cmm_child,
 162                                                          data);
 163         RETURN(rc);
 164 }
 165
 166 static int cmm_quota_cleanup(const struct lu_env *env, struct md_device *m)
 167 {
 168         struct cmm_device *cmm_dev = md2cmm_dev(m);
 169         int rc;
 170         ENTRY;
 171
 172         /* disable quota for CMD case temporary. */
 173         if (cmm_dev->cmm_tgt_count)
 174                 RETURN(-EOPNOTSUPP);
 175
 176         rc = cmm_child_ops(cmm_dev)->mdo_quota.mqo_cleanup(env,
 177                                                            cmm_dev->cmm_child);
 178         RETURN(rc);
 179 }
 180
 181 static int cmm_quota_recovery(const struct lu_env *env, struct md_device *m)
 182 {
 183         struct cmm_device *cmm_dev = md2cmm_dev(m);
 184         int rc;
 185         ENTRY;
 186
 187         /* disable quota for CMD case temporary. */
 188         if (cmm_dev->cmm_tgt_count)
 189                 RETURN(-EOPNOTSUPP);
 190
 191         rc = cmm_child_ops(cmm_dev)->mdo_quota.mqo_recovery(env,
 192                                                             cmm_dev->cmm_child);
 193         RETURN(rc);
 194 }
 195
 196 static int cmm_quota_check(const struct lu_env *env, struct md_device *m,
 197                            struct obd_export *exp, __u32 type)
 198 {
 199         struct cmm_device *cmm_dev = md2cmm_dev(m);
 200         int rc;
 201         ENTRY;
 202
 203         /* disable quota for CMD case temporary. */
 204         if (cmm_dev->cmm_tgt_count)
 205                 RETURN(-EOPNOTSUPP);
 206
 207         rc = cmm_child_ops(cmm_dev)->mdo_quota.mqo_check(env,
 208                                                          cmm_dev->cmm_child,
 209                                                          exp, type);
 210         RETURN(rc);
 211 }
 212
 213 static int cmm_quota_on(const struct lu_env *env, struct md_device *m,
 214                         __u32 type, __u32 id)
 215 {
 216         struct cmm_device *cmm_dev = md2cmm_dev(m);
 217         int rc;
 218         ENTRY;
 219
 220         /* disable quota for CMD case temporary. */
 221         if (cmm_dev->cmm_tgt_count)
 222                 RETURN(-EOPNOTSUPP);
 223
 224         rc = cmm_child_ops(cmm_dev)->mdo_quota.mqo_on(env,
 225                                                       cmm_dev->cmm_child,
 226                                                       type, id);
 227         RETURN(rc);
 228 }
 229
 230 static int cmm_quota_off(const struct lu_env *env, struct md_device *m,
 231                          __u32 type, __u32 id)
 232 {
 233         struct cmm_device *cmm_dev = md2cmm_dev(m);
 234         int rc;
 235         ENTRY;
 236
 237         /* disable quota for CMD case temporary. */
 238         if (cmm_dev->cmm_tgt_count)
 239                 RETURN(-EOPNOTSUPP);
 240
 241         rc = cmm_child_ops(cmm_dev)->mdo_quota.mqo_off(env,
 242                                                        cmm_dev->cmm_child,
 243                                                        type, id);
 244         RETURN(rc);
 245 }
 246
 247 static int cmm_quota_setinfo(const struct lu_env *env, struct md_device *m,
 248                              __u32 type, __u32 id, struct obd_dqinfo *dqinfo)
 249 {
 250         struct cmm_device *cmm_dev = md2cmm_dev(m);
 251         int rc;
 252         ENTRY;
 253
 254         /* disable quota for CMD case temporary. */
 255         if (cmm_dev->cmm_tgt_count)
 256                 RETURN(-EOPNOTSUPP);
 257
 258         rc = cmm_child_ops(cmm_dev)->mdo_quota.mqo_setinfo(env,
 259                                                            cmm_dev->cmm_child,
 260                                                            type, id, dqinfo);
 261         RETURN(rc);
 262 }
 263
 264 static int cmm_quota_getinfo(const struct lu_env *env,
 265                              const struct md_device *m,
 266                              __u32 type, __u32 id, struct obd_dqinfo *dqinfo)
 267 {
 268         struct cmm_device *cmm_dev = md2cmm_dev((struct md_device *)m);
 269         int rc;
 270         ENTRY;
 271
 272         /* disable quota for CMD case temporary. */
 273         if (cmm_dev->cmm_tgt_count)
 274                 RETURN(-EOPNOTSUPP);
 275
 276         rc = cmm_child_ops(cmm_dev)->mdo_quota.mqo_getinfo(env,
 277                                                            cmm_dev->cmm_child,
 278                                                            type, id, dqinfo);
 279         RETURN(rc);
 280 }
 281
 282 static int cmm_quota_setquota(const struct lu_env *env, struct md_device *m,
 283                               __u32 type, __u32 id, struct obd_dqblk *dqblk)
 284 {
 285         struct cmm_device *cmm_dev = md2cmm_dev(m);
 286         int rc;
 287         ENTRY;
 288
 289         /* disable quota for CMD case temporary. */
 290         if (cmm_dev->cmm_tgt_count)
 291                 RETURN(-EOPNOTSUPP);
 292
 293         rc = cmm_child_ops(cmm_dev)->mdo_quota.mqo_setquota(env,
 294                                                             cmm_dev->cmm_child,
 295                                                             type, id, dqblk);
 296         RETURN(rc);
 297 }
 298
 299 static int cmm_quota_getquota(const struct lu_env *env,
 300                               const struct md_device *m,
 301                               __u32 type, __u32 id, struct obd_dqblk *dqblk)
 302 {
 303         struct cmm_device *cmm_dev = md2cmm_dev((struct md_device *)m);
 304         int rc;
 305         ENTRY;
 306
 307         /* disable quota for CMD case temporary. */
 308         if (cmm_dev->cmm_tgt_count)
 309                 RETURN(-EOPNOTSUPP);
 310
 311         rc = cmm_child_ops(cmm_dev)->mdo_quota.mqo_getquota(env,
 312                                                             cmm_dev->cmm_child,
 313                                                             type, id, dqblk);
 314         RETURN(rc);
 315 }
 316
 317 static int cmm_quota_getoinfo(const struct lu_env *env,
 318                               const struct md_device *m,
 319                               __u32 type, __u32 id, struct obd_dqinfo *dqinfo)
 320 {
 321         struct cmm_device *cmm_dev = md2cmm_dev((struct md_device *)m);
 322         int rc;
 323         ENTRY;
 324
 325         /* disable quota for CMD case temporary. */
 326         if (cmm_dev->cmm_tgt_count)
 327                 RETURN(-EOPNOTSUPP);
 328
 329         rc = cmm_child_ops(cmm_dev)->mdo_quota.mqo_getoinfo(env,
 330                                                             cmm_dev->cmm_child,
 331                                                             type, id, dqinfo);
 332         RETURN(rc);
 333 }
 334
 335 static int cmm_quota_getoquota(const struct lu_env *env,
 336                                const struct md_device *m,
 337                                __u32 type, __u32 id, struct obd_dqblk *dqblk)
 338 {
 339         struct cmm_device *cmm_dev = md2cmm_dev((struct md_device *)m);
 340         int rc;
 341         ENTRY;
 342
 343         /* disable quota for CMD case temporary. */
 344         if (cmm_dev->cmm_tgt_count)
 345                 RETURN(-EOPNOTSUPP);
 346
 347         rc = cmm_child_ops(cmm_dev)->mdo_quota.mqo_getoquota(env,
 348                                                              cmm_dev->cmm_child,
 349                                                              type, id, dqblk);
 350         RETURN(rc);
 351 }
 352
 353 static int cmm_quota_invalidate(const struct lu_env *env, struct md_device *m,
 354                                 __u32 type)
 355 {
 356         struct cmm_device *cmm_dev = md2cmm_dev(m);
 357         int rc;
 358         ENTRY;
 359
 360         /* disable quota for CMD case temporary. */
 361         if (cmm_dev->cmm_tgt_count)
 362                 RETURN(-EOPNOTSUPP);
 363
 364         rc = cmm_child_ops(cmm_dev)->mdo_quota.mqo_invalidate(env,
 365                                                               cmm_dev->cmm_child,
 366                                                               type);
 367         RETURN(rc);
 368 }
 369
 370 static int cmm_quota_finvalidate(const struct lu_env *env, struct md_device *m,
 371                                  __u32 type)
 372 {
 373         struct cmm_device *cmm_dev = md2cmm_dev(m);
 374         int rc;
 375         ENTRY;
 376
 377         /* disable quota for CMD case temporary. */
 378         if (cmm_dev->cmm_tgt_count)
 379                 RETURN(-EOPNOTSUPP);
 380
 381         rc = cmm_child_ops(cmm_dev)->mdo_quota.mqo_finvalidate(env,
 382                                                                cmm_dev->cmm_child,
 383                                                                type);
 384         RETURN(rc);
 385 }
 386 #endif
 387
 388 static const struct md_device_operations cmm_md_ops = {
 389         .mdo_statfs          = cmm_statfs,
 390         .mdo_root_get        = cmm_root_get,
 391         .mdo_maxsize_get     = cmm_maxsize_get,
 392         .mdo_init_capa_ctxt  = cmm_init_capa_ctxt,
 393         .mdo_update_capa_key = cmm_update_capa_key,
 394 #ifdef HAVE_QUOTA_SUPPORT
 395         .mdo_quota           = {
 396                 .mqo_notify      = cmm_quota_notify,
 397                 .mqo_setup       = cmm_quota_setup,
 398                 .mqo_cleanup     = cmm_quota_cleanup,
 399                 .mqo_recovery    = cmm_quota_recovery,
 400                 .mqo_check       = cmm_quota_check,
 401                 .mqo_on          = cmm_quota_on,
 402                 .mqo_off         = cmm_quota_off,
 403                 .mqo_setinfo     = cmm_quota_setinfo,
 404                 .mqo_getinfo     = cmm_quota_getinfo,
 405                 .mqo_setquota    = cmm_quota_setquota,
 406                 .mqo_getquota    = cmm_quota_getquota,
 407                 .mqo_getoinfo    = cmm_quota_getoinfo,
 408                 .mqo_getoquota   = cmm_quota_getoquota,
 409                 .mqo_invalidate  = cmm_quota_invalidate,
 410                 .mqo_finvalidate = cmm_quota_finvalidate
 411         }
 412 #endif
 413 };
 414
 415 extern struct lu_device_type mdc_device_type;
 416
 417 static int cmm_post_init_mdc(const struct lu_env *env,
 418                              struct cmm_device *cmm)
 419 {
 420         int max_mdsize, max_cookiesize, rc;
 421         struct mdc_device *mc, *tmp;
 422
 423         /* get the max mdsize and cookiesize from lower layer */
 424         rc = cmm_maxsize_get(env, &cmm->cmm_md_dev, &max_mdsize,
 425                                                 &max_cookiesize);
 426         if (rc)
 427                 RETURN(rc);
 428
 429         spin_lock(&cmm->cmm_tgt_guard);
 430         list_for_each_entry_safe(mc, tmp, &cmm->cmm_targets,
 431                                  mc_linkage) {
 432                 cmm_mdc_init_ea_size(env, mc, max_mdsize, max_cookiesize);
 433         }
 434         spin_unlock(&cmm->cmm_tgt_guard);
 435         RETURN(rc);
 436 }
 437
 438 /* --- cmm_lu_operations --- */
 439 /* add new MDC to the CMM, create MDC lu_device and connect it to mdc_obd */
 440 static int cmm_add_mdc(const struct lu_env *env,
 441                        struct cmm_device *cm, struct lustre_cfg *cfg)
 442 {
 443         struct lu_device_type *ldt = &mdc_device_type;
 444         char *p, *num = lustre_cfg_string(cfg, 2);
 445         struct mdc_device *mc, *tmp;
 446         struct lu_fld_target target;
 447         struct lu_device *ld;
 448         struct lu_device *cmm_lu = cmm2lu_dev(cm);
 449         mdsno_t mdc_num;
 450         int rc;
 451         ENTRY;
 452
 453         /* find out that there is no such mdc */
 454         LASSERT(num);
 455         mdc_num = simple_strtol(num, &p, 10);
 456         if (*p) {
 457                 CERROR("Invalid index in lustre_cgf, offset 2\n");
 458                 RETURN(-EINVAL);
 459         }
 460
 461         spin_lock(&cm->cmm_tgt_guard);
 462         list_for_each_entry_safe(mc, tmp, &cm->cmm_targets,
 463                                  mc_linkage) {
 464                 if (mc->mc_num == mdc_num) {
 465                         spin_unlock(&cm->cmm_tgt_guard);
 466                         RETURN(-EEXIST);
 467                 }
 468         }
 469         spin_unlock(&cm->cmm_tgt_guard);
 470         ld = ldt->ldt_ops->ldto_device_alloc(env, ldt, cfg);
 471         if (IS_ERR(ld))
 472                 RETURN(PTR_ERR(ld));
 473
 474         ld->ld_site = cmm2lu_dev(cm)->ld_site;
 475
 476         rc = ldt->ldt_ops->ldto_device_init(env, ld, NULL, NULL);
 477         if (rc) {
 478                 ldt->ldt_ops->ldto_device_free(env, ld);
 479                 RETURN(rc);
 480         }
 481         /* pass config to the just created MDC */
 482         rc = ld->ld_ops->ldo_process_config(env, ld, cfg);
 483         if (rc) {
 484                 ldt->ldt_ops->ldto_device_fini(env, ld);
 485                 ldt->ldt_ops->ldto_device_free(env, ld);
 486                 RETURN(rc);
 487         }
 488
 489         spin_lock(&cm->cmm_tgt_guard);
 490         list_for_each_entry_safe(mc, tmp, &cm->cmm_targets,
 491                                  mc_linkage) {
 492                 if (mc->mc_num == mdc_num) {
 493                         spin_unlock(&cm->cmm_tgt_guard);
 494                         ldt->ldt_ops->ldto_device_fini(env, ld);
 495                         ldt->ldt_ops->ldto_device_free(env, ld);
 496                         RETURN(-EEXIST);
 497                 }
 498         }
 499         mc = lu2mdc_dev(ld);
 500         list_add_tail(&mc->mc_linkage, &cm->cmm_targets);
 501         cm->cmm_tgt_count++;
 502         spin_unlock(&cm->cmm_tgt_guard);
 503
 504         lu_device_get(cmm_lu);
 505         lu_ref_add(&cmm_lu->ld_reference, "mdc-child", ld);
 506
 507         target.ft_srv = NULL;
 508         target.ft_idx = mc->mc_num;
 509         target.ft_exp = mc->mc_desc.cl_exp;
 510         fld_client_add_target(cm->cmm_fld, &target);
 511
 512         /* Set max md size for the mdc. */
 513         rc = cmm_post_init_mdc(env, cm);
 514         RETURN(rc);
 515 }
 516
 517 static void cmm_device_shutdown(const struct lu_env *env,
 518                                 struct cmm_device *cm,
 519                                 struct lustre_cfg *cfg)
 520 {
 521         struct mdc_device *mc, *tmp;
 522         ENTRY;
 523
 524         /* Remove local target from FLD. */
 525         fld_client_del_target(cm->cmm_fld, cm->cmm_local_num);
 526
 527         /* Finish all mdc devices. */
 528         spin_lock(&cm->cmm_tgt_guard);
 529         list_for_each_entry_safe(mc, tmp, &cm->cmm_targets, mc_linkage) {
 530                 struct lu_device *ld_m = mdc2lu_dev(mc);
 531                 fld_client_del_target(cm->cmm_fld, mc->mc_num);
 532                 ld_m->ld_ops->ldo_process_config(env, ld_m, cfg);
 533         }
 534         spin_unlock(&cm->cmm_tgt_guard);
 535
 536         /* remove upcall device*/
 537         md_upcall_fini(&cm->cmm_md_dev);
 538
 539         EXIT;
 540 }
 541
 542 static int cmm_device_mount(const struct lu_env *env,
 543                             struct cmm_device *m, struct lustre_cfg *cfg)
 544 {
 545         const char *index = lustre_cfg_string(cfg, 2);
 546         char *p;
 547
 548         LASSERT(index != NULL);
 549
 550         m->cmm_local_num = simple_strtol(index, &p, 10);
 551         if (*p) {
 552                 CERROR("Invalid index in lustre_cgf\n");
 553                 RETURN(-EINVAL);
 554         }
 555
 556         RETURN(0);
 557 }
 558
 559 static int cmm_process_config(const struct lu_env *env,
 560                               struct lu_device *d, struct lustre_cfg *cfg)
 561 {
 562         struct cmm_device *m = lu2cmm_dev(d);
 563         struct lu_device *next = md2lu_dev(m->cmm_child);
 564         int err;
 565         ENTRY;
 566
 567         switch(cfg->lcfg_command) {
 568         case LCFG_ADD_MDC:
 569                 /* On first ADD_MDC add also local target. */
 570                 if (!(m->cmm_flags & CMM_INITIALIZED)) {
 571                         struct lu_site *ls = cmm2lu_dev(m)->ld_site;
 572                         struct lu_fld_target target;
 573
 574                         target.ft_srv = lu_site2md(ls)->ms_server_fld;
 575                         target.ft_idx = m->cmm_local_num;
 576                         target.ft_exp = NULL;
 577
 578                         fld_client_add_target(m->cmm_fld, &target);
 579                 }
 580                 err = cmm_add_mdc(env, m, cfg);
 581
 582                 /* The first ADD_MDC can be counted as setup is finished. */
 583                 if (!(m->cmm_flags & CMM_INITIALIZED))
 584                         m->cmm_flags |= CMM_INITIALIZED;
 585
 586                 break;
 587         case LCFG_SETUP:
 588         {
 589                 /* lower layers should be set up at first */
 590                 err = next->ld_ops->ldo_process_config(env, next, cfg);
 591                 if (err == 0)
 592                         err = cmm_device_mount(env, m, cfg);
 593                 break;
 594         }
 595         case LCFG_CLEANUP:
 596         {
 597                 cmm_device_shutdown(env, m, cfg);
 598         }
 599         default:
 600                 err = next->ld_ops->ldo_process_config(env, next, cfg);
 601         }
 602         RETURN(err);
 603 }
 604
 605 static int cmm_recovery_complete(const struct lu_env *env,
 606                                  struct lu_device *d)
 607 {
 608         struct cmm_device *m = lu2cmm_dev(d);
 609         struct lu_device *next = md2lu_dev(m->cmm_child);
 610         int rc;
 611         ENTRY;
 612         rc = next->ld_ops->ldo_recovery_complete(env, next);
 613         RETURN(rc);
 614 }
 615
 616 static const struct lu_device_operations cmm_lu_ops = {
 617         .ldo_object_alloc      = cmm_object_alloc,
 618         .ldo_process_config    = cmm_process_config,
 619         .ldo_recovery_complete = cmm_recovery_complete
 620 };
 621
 622 /* --- lu_device_type operations --- */
 623 int cmm_upcall(const struct lu_env *env, struct md_device *md,
 624                enum md_upcall_event ev)
 625 {
 626         int rc;
 627         ENTRY;
 628
 629         switch (ev) {
 630                 case MD_LOV_SYNC:
 631                         rc = cmm_post_init_mdc(env, md2cmm_dev(md));
 632                         if (rc)
 633                                 CERROR("can not init md size %d\n", rc);
 634                         /* fall through */
 635                 default:
 636                         rc = md_do_upcall(env, md, ev);
 637         }
 638         RETURN(rc);
 639 }
 640
 641 static struct lu_device *cmm_device_free(const struct lu_env *env,
 642                                          struct lu_device *d)
 643 {
 644         struct cmm_device *m = lu2cmm_dev(d);
 645         struct lu_device  *next = md2lu_dev(m->cmm_child);
 646         ENTRY;
 647
 648         LASSERT(m->cmm_tgt_count == 0);
 649         LASSERT(list_empty(&m->cmm_targets));
 650         if (m->cmm_fld != NULL) {
 651                 OBD_FREE_PTR(m->cmm_fld);
 652                 m->cmm_fld = NULL;
 653         }
 654         md_device_fini(&m->cmm_md_dev);
 655         OBD_FREE_PTR(m);
 656         RETURN(next);
 657 }
 658
 659 static struct lu_device *cmm_device_alloc(const struct lu_env *env,
 660                                           struct lu_device_type *t,
 661                                           struct lustre_cfg *cfg)
 662 {
 663         struct lu_device  *l;
 664         struct cmm_device *m;
 665         ENTRY;
 666
 667         OBD_ALLOC_PTR(m);
 668         if (m == NULL) {
 669                 l = ERR_PTR(-ENOMEM);
 670         } else {
 671                 md_device_init(&m->cmm_md_dev, t);
 672                 m->cmm_md_dev.md_ops = &cmm_md_ops;
 673                 md_upcall_init(&m->cmm_md_dev, cmm_upcall);
 674                 l = cmm2lu_dev(m);
 675                 l->ld_ops = &cmm_lu_ops;
 676
 677                 OBD_ALLOC_PTR(m->cmm_fld);
 678                 if (!m->cmm_fld) {
 679                         cmm_device_free(env, l);
 680                         l = ERR_PTR(-ENOMEM);
 681                 }
 682         }
 683         RETURN(l);
 684 }
 685
 686 /* context key constructor/destructor: cmm_key_init, cmm_key_fini */
 687 LU_KEY_INIT_FINI(cmm, struct cmm_thread_info);
 688
 689 /* context key: cmm_thread_key */
 690 LU_CONTEXT_KEY_DEFINE(cmm, LCT_MD_THREAD);
 691
 692 struct cmm_thread_info *cmm_env_info(const struct lu_env *env)
 693 {
 694         struct cmm_thread_info *info;
 695
 696         info = lu_context_key_get(&env->le_ctx, &cmm_thread_key);
 697         LASSERT(info != NULL);
 698         return info;
 699 }
 700
 701 /* type constructor/destructor: cmm_type_init/cmm_type_fini */
 702 LU_TYPE_INIT_FINI(cmm, &cmm_thread_key);
 703
 704 static int cmm_device_init(const struct lu_env *env, struct lu_device *d,
 705                            const char *name, struct lu_device *next)
 706 {
 707         struct cmm_device *m = lu2cmm_dev(d);
 708         struct lu_site *ls;
 709         int err = 0;
 710         ENTRY;
 711
 712         spin_lock_init(&m->cmm_tgt_guard);
 713         CFS_INIT_LIST_HEAD(&m->cmm_targets);
 714         m->cmm_tgt_count = 0;
 715         m->cmm_child = lu2md_dev(next);
 716
 717         err = fld_client_init(m->cmm_fld, name,
 718                               LUSTRE_CLI_FLD_HASH_DHT);
 719         if (err) {
 720                 CERROR("Can't init FLD, err %d\n", err);
 721                 RETURN(err);
 722         }
 723
 724         /* Assign site's fld client ref, needed for asserts in osd. */
 725         ls = cmm2lu_dev(m)->ld_site;
 726         lu_site2md(ls)->ms_client_fld = m->cmm_fld;
 727         err = cmm_procfs_init(m, name);
 728
 729         RETURN(err);
 730 }
 731
 732 static struct lu_device *cmm_device_fini(const struct lu_env *env,
 733                                          struct lu_device *ld)
 734 {
 735         struct cmm_device *cm = lu2cmm_dev(ld);
 736         struct mdc_device *mc, *tmp;
 737         struct lu_site *ls;
 738         ENTRY;
 739
 740         /* Finish all mdc devices */
 741         spin_lock(&cm->cmm_tgt_guard);
 742         list_for_each_entry_safe(mc, tmp, &cm->cmm_targets, mc_linkage) {
 743                 struct lu_device *ld_m = mdc2lu_dev(mc);
 744                 struct lu_device *ld_c = cmm2lu_dev(cm);
 745
 746                 list_del_init(&mc->mc_linkage);
 747                 lu_ref_del(&ld_c->ld_reference, "mdc-child", ld_m);
 748                 lu_device_put(ld_c);
 749                 ld_m->ld_type->ldt_ops->ldto_device_fini(env, ld_m);
 750                 ld_m->ld_type->ldt_ops->ldto_device_free(env, ld_m);
 751                 cm->cmm_tgt_count--;
 752         }
 753         spin_unlock(&cm->cmm_tgt_guard);
 754
 755         fld_client_fini(cm->cmm_fld);
 756         ls = cmm2lu_dev(cm)->ld_site;
 757         lu_site2md(ls)->ms_client_fld = NULL;
 758         cmm_procfs_fini(cm);
 759
 760         RETURN (md2lu_dev(cm->cmm_child));
 761 }
 762
 763 static struct lu_device_type_operations cmm_device_type_ops = {
 764         .ldto_init = cmm_type_init,
 765         .ldto_fini = cmm_type_fini,
 766
 767         .ldto_start = cmm_type_start,
 768         .ldto_stop  = cmm_type_stop,
 769
 770         .ldto_device_alloc = cmm_device_alloc,
 771         .ldto_device_free  = cmm_device_free,
 772
 773         .ldto_device_init = cmm_device_init,
 774         .ldto_device_fini = cmm_device_fini
 775 };
 776
 777 static struct lu_device_type cmm_device_type = {
 778         .ldt_tags     = LU_DEVICE_MD,
 779         .ldt_name     = LUSTRE_CMM_NAME,
 780         .ldt_ops      = &cmm_device_type_ops,
 781         .ldt_ctx_tags = LCT_MD_THREAD | LCT_DT_THREAD
 782 };
 783
 784 struct lprocfs_vars lprocfs_cmm_obd_vars[] = {
 785         { 0 }
 786 };
 787
 788 struct lprocfs_vars lprocfs_cmm_module_vars[] = {
 789         { 0 }
 790 };
 791
 792 static void lprocfs_cmm_init_vars(struct lprocfs_static_vars *lvars)
 793 {
 794     lvars->module_vars  = lprocfs_cmm_module_vars;
 795     lvars->obd_vars     = lprocfs_cmm_obd_vars;
 796 }
 797
 798 static int __init cmm_mod_init(void)
 799 {
 800         struct lprocfs_static_vars lvars;
 801
 802         lprocfs_cmm_init_vars(&lvars);
 803         return class_register_type(&cmm_obd_device_ops, NULL, lvars.module_vars,
 804                                    LUSTRE_CMM_NAME, &cmm_device_type);
 805 }
 806
 807 static void __exit cmm_mod_exit(void)
 808 {
 809         class_unregister_type(LUSTRE_CMM_NAME);
 810 }
 811
 812 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 813 MODULE_DESCRIPTION("Lustre Clustered Metadata Manager ("LUSTRE_CMM_NAME")");
 814 MODULE_LICENSE("GPL");
 815
 816 cfs_module(cmm, "0.1.0", cmm_mod_init, cmm_mod_exit);