lustre/osd-ldiskfs/osd_compat.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/osd/osd_compat.c
  37  *
  38  * on-disk structure for managing /O
  39  *
  40  * Author: Alex Zhuravlev <bzzz@whamcloud.com>
  41  */
  42
  43 /* LUSTRE_VERSION_CODE */
  44 #include <lustre_ver.h>
  45 /* prerequisite for linux/xattr.h */
  46 #include <linux/types.h>
  47 /* prerequisite for linux/xattr.h */
  48 #include <linux/fs.h>
  49 /* XATTR_{REPLACE,CREATE} */
  50 #include <linux/xattr.h>
  51
  52 /*
  53  * struct OBD_{ALLOC,FREE}*()
  54  * OBD_FAIL_CHECK
  55  */
  56 #include <obd_support.h>
  57
  58 #include "osd_internal.h"
  59 #include "osd_oi.h"
  60
  61 static void osd_push_ctxt(const struct osd_device *dev,
  62                           struct lvfs_run_ctxt *newctxt,
  63                           struct lvfs_run_ctxt *save)
  64 {
  65         OBD_SET_CTXT_MAGIC(newctxt);
  66         newctxt->pwdmnt = dev->od_mnt;
  67         newctxt->pwd = dev->od_mnt->mnt_root;
  68         newctxt->fs = get_ds();
  69
  70         push_ctxt(save, newctxt, NULL);
  71 }
  72
  73 static void osd_pop_ctxt(const struct osd_device *dev,
  74                          struct lvfs_run_ctxt *new,
  75                          struct lvfs_run_ctxt *save)
  76 {
  77         pop_ctxt(save, new, NULL);
  78 }
  79
  80 /* utility to make a directory */
  81 static struct dentry *simple_mkdir(struct dentry *dir, struct vfsmount *mnt,
  82                                    const char *name, int mode, int fix)
  83 {
  84         struct dentry *dchild;
  85         int err = 0;
  86         ENTRY;
  87
  88         // ASSERT_KERNEL_CTXT("kernel doing mkdir outside kernel context\n");
  89         CDEBUG(D_INODE, "creating directory %.*s\n", (int)strlen(name), name);
  90         dchild = ll_lookup_one_len(name, dir, strlen(name));
  91         if (IS_ERR(dchild))
  92                 GOTO(out_up, dchild);
  93
  94         if (dchild->d_inode) {
  95                 int old_mode = dchild->d_inode->i_mode;
  96                 if (!S_ISDIR(old_mode)) {
  97                         CERROR("found %s (%lu/%u) is mode %o\n", name,
  98                                dchild->d_inode->i_ino,
  99                                dchild->d_inode->i_generation, old_mode);
 100                         GOTO(out_err, err = -ENOTDIR);
 101                 }
 102
 103                 /* Fixup directory permissions if necessary */
 104                 if (fix && (old_mode & S_IALLUGO) != (mode & S_IALLUGO)) {
 105                         CDEBUG(D_CONFIG,
 106                                "fixing permissions on %s from %o to %o\n",
 107                                name, old_mode, mode);
 108                         dchild->d_inode->i_mode = (mode & S_IALLUGO) |
 109                                                   (old_mode & ~S_IALLUGO);
 110                         mark_inode_dirty(dchild->d_inode);
 111                 }
 112                 GOTO(out_up, dchild);
 113         }
 114
 115         err = ll_vfs_mkdir(dir->d_inode, dchild, mnt, mode);
 116         if (err)
 117                 GOTO(out_err, err);
 118
 119         RETURN(dchild);
 120
 121 out_err:
 122         dput(dchild);
 123         dchild = ERR_PTR(err);
 124 out_up:
 125         return dchild;
 126 }
 127
 128 int osd_last_rcvd_subdir_count(struct osd_device *osd)
 129 {
 130         struct lr_server_data lsd;
 131         struct dentry        *dlast;
 132         loff_t                off;
 133         int                   rc = 0;
 134         int                   count = FILTER_SUBDIR_COUNT;
 135
 136         ENTRY;
 137
 138         dlast = ll_lookup_one_len(LAST_RCVD, osd_sb(osd)->s_root,
 139                                   strlen(LAST_RCVD));
 140         if (IS_ERR(dlast))
 141                 return PTR_ERR(dlast);
 142         else if (dlast->d_inode == NULL)
 143                 goto out;
 144
 145         off = 0;
 146         rc = osd_ldiskfs_read(dlast->d_inode, &lsd, sizeof(lsd), &off);
 147         if (rc == sizeof(lsd)) {
 148                 CDEBUG(D_INFO, "read last_rcvd header, uuid = %s, "
 149                        "subdir count = %d\n", lsd.lsd_uuid,
 150                        lsd.lsd_subdir_count);
 151                 if (le16_to_cpu(lsd.lsd_subdir_count) > 0)
 152                         count = le16_to_cpu(lsd.lsd_subdir_count);
 153         } else if (rc != 0) {
 154                 CERROR("Can't read last_rcvd file, rc = %d\n", rc);
 155                 if (rc > 0)
 156                         rc = -EFAULT;
 157                 dput(dlast);
 158                 return rc;
 159         }
 160 out:
 161         dput(dlast);
 162         LASSERT(count > 0);
 163         return count;
 164 }
 165
 166 static const char remote_parent_dir[] = "REMOTE_PARENT_DIR";
 167 static int osd_mdt_init(const struct lu_env *env, struct osd_device *dev)
 168 {
 169         struct lvfs_run_ctxt    new;
 170         struct lvfs_run_ctxt    save;
 171         struct dentry           *parent;
 172         struct osd_mdobj_map    *omm;
 173         struct dentry           *d;
 174         struct osd_thread_info  *info = osd_oti_get(env);
 175         struct lu_fid           *fid = &info->oti_fid;
 176         int                     rc = 0;
 177         ENTRY;
 178
 179         OBD_ALLOC_PTR(dev->od_mdt_map);
 180         if (dev->od_mdt_map == NULL)
 181                 RETURN(-ENOMEM);
 182
 183         omm = dev->od_mdt_map;
 184
 185         LASSERT(dev->od_fsops);
 186
 187         parent = osd_sb(dev)->s_root;
 188         osd_push_ctxt(dev, &new, &save);
 189
 190         d = simple_mkdir(parent, dev->od_mnt, remote_parent_dir,
 191                          0755, 1);
 192         if (IS_ERR(d))
 193                 GOTO(cleanup, rc = PTR_ERR(d));
 194
 195         omm->omm_remote_parent = d;
 196
 197         /* Set LMA for remote parent inode */
 198         lu_local_obj_fid(fid, REMOTE_PARENT_DIR_OID);
 199         rc = osd_ea_fid_set(info, d->d_inode, fid, 0);
 200         if (rc != 0)
 201                 GOTO(cleanup, rc);
 202 cleanup:
 203         pop_ctxt(&save, &new, NULL);
 204         if (rc) {
 205                 if (omm->omm_remote_parent != NULL)
 206                         dput(omm->omm_remote_parent);
 207                 OBD_FREE_PTR(omm);
 208                 dev->od_mdt_map = NULL;
 209         }
 210         RETURN(rc);
 211 }
 212
 213 static void osd_mdt_fini(struct osd_device *osd)
 214 {
 215         struct osd_mdobj_map *omm = osd->od_mdt_map;
 216
 217         if (omm == NULL)
 218                 return;
 219
 220         if (omm->omm_remote_parent)
 221                 dput(omm->omm_remote_parent);
 222
 223         OBD_FREE_PTR(omm);
 224         osd->od_ost_map = NULL;
 225 }
 226
 227 int osd_add_to_remote_parent(const struct lu_env *env, struct osd_device *osd,
 228                              struct osd_object *obj, struct osd_thandle *oh)
 229 {
 230         struct osd_mdobj_map    *omm = osd->od_mdt_map;
 231         struct osd_thread_info  *oti = osd_oti_get(env);
 232         struct lustre_mdt_attrs *lma = &oti->oti_mdt_attrs;
 233         char                    *name = oti->oti_name;
 234         struct dentry           *dentry;
 235         struct dentry           *parent;
 236         int                     rc;
 237
 238         /* Set REMOTE_PARENT in lma, so other process like unlink or lfsck
 239          * can identify this object quickly */
 240         rc = osd_get_lma(oti, obj->oo_inode, &oti->oti_obj_dentry, lma);
 241         if (rc != 0)
 242                 RETURN(rc);
 243
 244         lma->lma_incompat |= LMAI_REMOTE_PARENT;
 245         lustre_lma_swab(lma);
 246         rc = __osd_xattr_set(oti, obj->oo_inode, XATTR_NAME_LMA, lma,
 247                              sizeof(*lma), XATTR_REPLACE);
 248         if (rc != 0)
 249                 RETURN(rc);
 250
 251         parent = omm->omm_remote_parent;
 252         sprintf(name, DFID_NOBRACE, PFID(lu_object_fid(&obj->oo_dt.do_lu)));
 253         dentry = osd_child_dentry_by_inode(env, parent->d_inode,
 254                                            name, strlen(name));
 255         mutex_lock(&parent->d_inode->i_mutex);
 256         rc = osd_ldiskfs_add_entry(oh->ot_handle, dentry, obj->oo_inode,
 257                                    NULL);
 258         LASSERTF(parent->d_inode->i_nlink > 1, "%s: %lu nlink %d",
 259                  osd_name(osd), parent->d_inode->i_ino,
 260                  parent->d_inode->i_nlink);
 261         parent->d_inode->i_nlink++;
 262         mark_inode_dirty(parent->d_inode);
 263         mutex_unlock(&parent->d_inode->i_mutex);
 264         RETURN(rc);
 265 }
 266
 267 int osd_delete_from_remote_parent(const struct lu_env *env,
 268                                   struct osd_device *osd,
 269                                   struct osd_object *obj,
 270                                   struct osd_thandle *oh)
 271 {
 272         struct osd_mdobj_map       *omm = osd->od_mdt_map;
 273         struct osd_thread_info     *oti = osd_oti_get(env);
 274         struct lustre_mdt_attrs    *lma = &oti->oti_mdt_attrs;
 275         char                       *name = oti->oti_name;
 276         struct dentry              *dentry;
 277         struct dentry              *parent;
 278         struct ldiskfs_dir_entry_2 *de;
 279         struct buffer_head         *bh;
 280         int                        rc;
 281
 282         /* Check lma to see whether it is remote object */
 283         rc = osd_get_lma(oti, obj->oo_inode, &oti->oti_obj_dentry, lma);
 284         if (rc != 0)
 285                 RETURN(rc);
 286
 287         if (likely(!(lma->lma_incompat & LMAI_REMOTE_PARENT)))
 288                 RETURN(0);
 289
 290         parent = omm->omm_remote_parent;
 291         sprintf(name, DFID_NOBRACE, PFID(lu_object_fid(&obj->oo_dt.do_lu)));
 292         dentry = osd_child_dentry_by_inode(env, parent->d_inode,
 293                                            name, strlen(name));
 294         mutex_lock(&parent->d_inode->i_mutex);
 295         bh = osd_ldiskfs_find_entry(parent->d_inode, dentry, &de, NULL);
 296         if (bh == NULL) {
 297                 mutex_unlock(&parent->d_inode->i_mutex);
 298                 RETURN(-ENOENT);
 299         }
 300         rc = ldiskfs_delete_entry(oh->ot_handle, parent->d_inode, de, bh);
 301         LASSERTF(parent->d_inode->i_nlink > 1, "%s: %lu nlink %d",
 302                  osd_name(osd), parent->d_inode->i_ino,
 303                  parent->d_inode->i_nlink);
 304         parent->d_inode->i_nlink--;
 305         mark_inode_dirty(parent->d_inode);
 306         mutex_unlock(&parent->d_inode->i_mutex);
 307         brelse(bh);
 308         RETURN(rc);
 309 }
 310
 311 /*
 312  * directory structure on legacy OST:
 313  *
 314  * O/<seq>/d0-31/<objid>
 315  * O/<seq>/LAST_ID
 316  * last_rcvd
 317  * LAST_GROUP
 318  * CONFIGS
 319  *
 320  */
 321 static int osd_ost_init(struct osd_device *dev)
 322 {
 323         struct lvfs_run_ctxt  new;
 324         struct lvfs_run_ctxt  save;
 325         struct dentry        *rootd = osd_sb(dev)->s_root;
 326         struct dentry        *d;
 327         int                   rc;
 328         ENTRY;
 329
 330         OBD_ALLOC_PTR(dev->od_ost_map);
 331         if (dev->od_ost_map == NULL)
 332                 RETURN(-ENOMEM);
 333
 334         /* to get subdir count from last_rcvd */
 335         rc = osd_last_rcvd_subdir_count(dev);
 336         if (rc < 0) {
 337                 OBD_FREE_PTR(dev->od_ost_map);
 338                 RETURN(rc);
 339         }
 340
 341         dev->od_ost_map->om_subdir_count = rc;
 342         rc = 0;
 343
 344         CFS_INIT_LIST_HEAD(&dev->od_ost_map->om_seq_list);
 345         rwlock_init(&dev->od_ost_map->om_seq_list_lock);
 346         sema_init(&dev->od_ost_map->om_dir_init_sem, 1);
 347
 348         LASSERT(dev->od_fsops);
 349         osd_push_ctxt(dev, &new, &save);
 350
 351         d = simple_mkdir(rootd, dev->od_mnt, "O", 0755, 1);
 352         if (IS_ERR(d))
 353                 GOTO(cleanup, rc = PTR_ERR(d));
 354
 355         ldiskfs_set_inode_state(d->d_inode, LDISKFS_STATE_LUSTRE_NO_OI);
 356         dev->od_ost_map->om_root = d;
 357
 358 cleanup:
 359         osd_pop_ctxt(dev, &new, &save);
 360         if (IS_ERR(d)) {
 361                 OBD_FREE_PTR(dev->od_ost_map);
 362                 RETURN(PTR_ERR(d));
 363         }
 364
 365         RETURN(rc);
 366 }
 367
 368 static void osd_seq_free(struct osd_obj_map *map,
 369                          struct osd_obj_seq *osd_seq)
 370 {
 371         int j;
 372
 373         cfs_list_del_init(&osd_seq->oos_seq_list);
 374
 375         if (osd_seq->oos_dirs) {
 376                 for (j = 0; j < osd_seq->oos_subdir_count; j++) {
 377                         if (osd_seq->oos_dirs[j])
 378                                 dput(osd_seq->oos_dirs[j]);
 379                 }
 380                 OBD_FREE(osd_seq->oos_dirs,
 381                          sizeof(struct dentry *) * osd_seq->oos_subdir_count);
 382         }
 383
 384         if (osd_seq->oos_root)
 385                 dput(osd_seq->oos_root);
 386
 387         OBD_FREE_PTR(osd_seq);
 388 }
 389
 390 static void osd_ost_fini(struct osd_device *osd)
 391 {
 392         struct osd_obj_seq    *osd_seq;
 393         struct osd_obj_seq    *tmp;
 394         struct osd_obj_map    *map = osd->od_ost_map;
 395         ENTRY;
 396
 397         if (map == NULL)
 398                 return;
 399
 400         write_lock(&map->om_seq_list_lock);
 401         cfs_list_for_each_entry_safe(osd_seq, tmp,
 402                                      &map->om_seq_list,
 403                                      oos_seq_list) {
 404                 osd_seq_free(map, osd_seq);
 405         }
 406         write_unlock(&map->om_seq_list_lock);
 407         if (map->om_root)
 408                 dput(map->om_root);
 409         OBD_FREE_PTR(map);
 410         osd->od_ost_map = NULL;
 411         EXIT;
 412 }
 413
 414 int osd_obj_map_init(const struct lu_env *env, struct osd_device *dev)
 415 {
 416         int rc;
 417         ENTRY;
 418
 419         /* prepare structures for OST */
 420         rc = osd_ost_init(dev);
 421         if (rc)
 422                 RETURN(rc);
 423
 424         /* prepare structures for MDS */
 425         rc = osd_mdt_init(env, dev);
 426
 427         RETURN(rc);
 428 }
 429
 430 struct osd_obj_seq *osd_seq_find_locked(struct osd_obj_map *map, obd_seq seq)
 431 {
 432         struct osd_obj_seq *osd_seq;
 433
 434         cfs_list_for_each_entry(osd_seq, &map->om_seq_list, oos_seq_list) {
 435                 if (osd_seq->oos_seq == seq)
 436                         return osd_seq;
 437         }
 438         return NULL;
 439 }
 440
 441 struct osd_obj_seq *osd_seq_find(struct osd_obj_map *map, obd_seq seq)
 442 {
 443         struct osd_obj_seq *osd_seq;
 444
 445         read_lock(&map->om_seq_list_lock);
 446         osd_seq = osd_seq_find_locked(map, seq);
 447         read_unlock(&map->om_seq_list_lock);
 448         return osd_seq;
 449 }
 450
 451 void osd_obj_map_fini(struct osd_device *dev)
 452 {
 453         osd_ost_fini(dev);
 454         osd_mdt_fini(dev);
 455 }
 456
 457 static int osd_obj_del_entry(struct osd_thread_info *info,
 458                              struct osd_device *osd,
 459                              struct dentry *dird, char *name,
 460                              struct thandle *th)
 461 {
 462         struct ldiskfs_dir_entry_2 *de;
 463         struct buffer_head         *bh;
 464         struct osd_thandle         *oh;
 465         struct dentry              *child;
 466         struct inode               *dir = dird->d_inode;
 467         int                         rc;
 468         ENTRY;
 469
 470         oh = container_of(th, struct osd_thandle, ot_super);
 471         LASSERT(oh->ot_handle != NULL);
 472         LASSERT(oh->ot_handle->h_transaction != NULL);
 473
 474
 475         child = &info->oti_child_dentry;
 476         child->d_name.hash = 0;
 477         child->d_name.name = name;
 478         child->d_name.len = strlen(name);
 479         child->d_parent = dird;
 480         child->d_inode = NULL;
 481
 482         ll_vfs_dq_init(dir);
 483         mutex_lock(&dir->i_mutex);
 484         rc = -ENOENT;
 485         bh = osd_ldiskfs_find_entry(dir, child, &de, NULL);
 486         if (bh) {
 487                 rc = ldiskfs_delete_entry(oh->ot_handle, dir, de, bh);
 488                 brelse(bh);
 489         }
 490         mutex_unlock(&dir->i_mutex);
 491
 492         RETURN(rc);
 493 }
 494
 495 int osd_obj_add_entry(struct osd_thread_info *info,
 496                       struct osd_device *osd,
 497                       struct dentry *dir, char *name,
 498                       const struct osd_inode_id *id,
 499                       struct thandle *th)
 500 {
 501         struct osd_thandle *oh;
 502         struct dentry *child;
 503         struct inode *inode;
 504         int rc;
 505
 506         ENTRY;
 507
 508         oh = container_of(th, struct osd_thandle, ot_super);
 509         LASSERT(oh->ot_handle != NULL);
 510         LASSERT(oh->ot_handle->h_transaction != NULL);
 511
 512         inode = &info->oti_inode;
 513         inode->i_sb = osd_sb(osd);
 514         osd_id_to_inode(inode, id);
 515         inode->i_mode = S_IFREG; /* for type in ldiskfs dir entry */
 516
 517         child = &info->oti_child_dentry;
 518         child->d_name.hash = 0;
 519         child->d_name.name = name;
 520         child->d_name.len = strlen(name);
 521         child->d_parent = dir;
 522         child->d_inode = inode;
 523
 524         ll_vfs_dq_init(dir->d_inode);
 525         mutex_lock(&dir->d_inode->i_mutex);
 526         rc = osd_ldiskfs_add_entry(oh->ot_handle, child, inode, NULL);
 527         mutex_unlock(&dir->d_inode->i_mutex);
 528
 529         RETURN(rc);
 530 }
 531
 532 /**
 533  * Use LPU64 for legacy OST sequences, but use LPX64i for new
 534  * sequences names, so that the O/{seq}/dN/{oid} more closely
 535  * follows the DFID/PFID format. This makes it easier to map from
 536  * debug messages to objects in the future, and the legacy space
 537  * of FID_SEQ_OST_MDT0 will be unused in the future.
 538  **/
 539 static inline void osd_seq_name(char *seq_name, obd_seq seq)
 540 {
 541         sprintf(seq_name, (fid_seq_is_rsvd(seq) ||
 542                            fid_seq_is_mdt0(seq)) ? LPU64 : LPX64i,
 543                 fid_seq_is_idif(seq) ? 0 : seq);
 544 }
 545
 546 static inline void osd_oid_name(char *name, const struct lu_fid *fid, obd_id id)
 547 {
 548         sprintf(name, (fid_seq_is_rsvd(fid_seq(fid)) ||
 549                 fid_seq_is_mdt0(fid_seq(fid)) ||
 550                 fid_seq_is_idif(fid_seq(fid))) ? LPU64 : LPX64i, id);
 551 }
 552
 553 /* external locking is required */
 554 static int osd_seq_load_locked(struct osd_device *osd,
 555                                struct osd_obj_seq *osd_seq)
 556 {
 557         struct osd_obj_map  *map = osd->od_ost_map;
 558         struct dentry       *seq_dir;
 559         int                 rc = 0;
 560         int                 i;
 561         char                seq_name[32];
 562         ENTRY;
 563
 564         if (osd_seq->oos_root != NULL)
 565                 RETURN(0);
 566
 567         LASSERT(map);
 568         LASSERT(map->om_root);
 569
 570         osd_seq_name(seq_name, osd_seq->oos_seq);
 571
 572         seq_dir = simple_mkdir(map->om_root, osd->od_mnt, seq_name, 0755, 1);
 573         if (IS_ERR(seq_dir))
 574                 GOTO(out_err, rc = PTR_ERR(seq_dir));
 575         else if (seq_dir->d_inode == NULL)
 576                 GOTO(out_put, rc = -EFAULT);
 577
 578         ldiskfs_set_inode_state(seq_dir->d_inode, LDISKFS_STATE_LUSTRE_NO_OI);
 579         osd_seq->oos_root = seq_dir;
 580
 581         LASSERT(osd_seq->oos_dirs == NULL);
 582         OBD_ALLOC(osd_seq->oos_dirs,
 583                   sizeof(seq_dir) * osd_seq->oos_subdir_count);
 584         if (osd_seq->oos_dirs == NULL)
 585                 GOTO(out_put, rc = -ENOMEM);
 586
 587         for (i = 0; i < osd_seq->oos_subdir_count; i++) {
 588                 struct dentry   *dir;
 589                 char         name[32];
 590
 591                 sprintf(name, "d%u", i);
 592                 dir = simple_mkdir(osd_seq->oos_root, osd->od_mnt, name,
 593                                    0700, 1);
 594                 if (IS_ERR(dir)) {
 595                         rc = PTR_ERR(dir);
 596                 } else if (dir->d_inode) {
 597                         ldiskfs_set_inode_state(dir->d_inode,
 598                                                 LDISKFS_STATE_LUSTRE_NO_OI);
 599                         osd_seq->oos_dirs[i] = dir;
 600                         rc = 0;
 601                 } else {
 602                         LBUG();
 603                 }
 604         }
 605
 606         if (rc != 0)
 607                 osd_seq_free(map, osd_seq);
 608 out_put:
 609         if (rc != 0) {
 610                 dput(seq_dir);
 611                 osd_seq->oos_root = NULL;
 612         }
 613 out_err:
 614         RETURN(rc);
 615 }
 616
 617 struct osd_obj_seq *osd_seq_load(struct osd_device *osd, obd_seq seq)
 618 {
 619         struct osd_obj_map      *map;
 620         struct osd_obj_seq      *osd_seq;
 621         int                     rc = 0;
 622         ENTRY;
 623
 624         map = osd->od_ost_map;
 625         LASSERT(map);
 626         LASSERT(map->om_root);
 627
 628         osd_seq = osd_seq_find(map, seq);
 629         if (likely(osd_seq != NULL))
 630                 RETURN(osd_seq);
 631
 632         /* Serializing init process */
 633         down(&map->om_dir_init_sem);
 634
 635         /* Check whether the seq has been added */
 636         read_lock(&map->om_seq_list_lock);
 637         osd_seq = osd_seq_find_locked(map, seq);
 638         if (osd_seq != NULL) {
 639                 read_unlock(&map->om_seq_list_lock);
 640                 GOTO(cleanup, rc = 0);
 641         }
 642         read_unlock(&map->om_seq_list_lock);
 643
 644         OBD_ALLOC_PTR(osd_seq);
 645         if (osd_seq == NULL)
 646                 GOTO(cleanup, rc = -ENOMEM);
 647
 648         CFS_INIT_LIST_HEAD(&osd_seq->oos_seq_list);
 649         osd_seq->oos_seq = seq;
 650         /* Init subdir count to be 32, but each seq can have
 651          * different subdir count */
 652         osd_seq->oos_subdir_count = map->om_subdir_count;
 653         rc = osd_seq_load_locked(osd, osd_seq);
 654         if (rc != 0)
 655                 GOTO(cleanup, rc);
 656
 657         write_lock(&map->om_seq_list_lock);
 658         cfs_list_add(&osd_seq->oos_seq_list, &map->om_seq_list);
 659         write_unlock(&map->om_seq_list_lock);
 660
 661 cleanup:
 662         up(&map->om_dir_init_sem);
 663         if (rc != 0) {
 664                 if (osd_seq != NULL)
 665                         OBD_FREE_PTR(osd_seq);
 666                 RETURN(ERR_PTR(rc));
 667         }
 668
 669         RETURN(osd_seq);
 670 }
 671
 672 int osd_obj_map_lookup(struct osd_thread_info *info, struct osd_device *dev,
 673                        const struct lu_fid *fid, struct osd_inode_id *id)
 674 {
 675         struct osd_obj_map              *map;
 676         struct osd_obj_seq              *osd_seq;
 677         struct dentry                   *d_seq;
 678         struct dentry                   *child;
 679         struct ost_id                   *ostid = &info->oti_ostid;
 680         int                             dirn;
 681         char                            name[32];
 682         struct ldiskfs_dir_entry_2      *de;
 683         struct buffer_head              *bh;
 684         struct inode                    *dir;
 685         struct inode                    *inode;
 686         ENTRY;
 687
 688         /* on the very first lookup we find and open directories */
 689
 690         map = dev->od_ost_map;
 691         LASSERT(map);
 692         LASSERT(map->om_root);
 693
 694         fid_ostid_pack(fid, ostid);
 695         osd_seq = osd_seq_load(dev, ostid->oi_seq);
 696         if (IS_ERR(osd_seq))
 697                 RETURN(PTR_ERR(osd_seq));
 698
 699         dirn = ostid->oi_id & (osd_seq->oos_subdir_count - 1);
 700         d_seq = osd_seq->oos_dirs[dirn];
 701         LASSERT(d_seq);
 702
 703         osd_oid_name(name, fid, ostid->oi_id);
 704
 705         child = &info->oti_child_dentry;
 706         child->d_parent = d_seq;
 707         child->d_name.hash = 0;
 708         child->d_name.name = name;
 709         /* XXX: we can use rc from sprintf() instead of strlen() */
 710         child->d_name.len = strlen(name);
 711
 712         dir = d_seq->d_inode;
 713         mutex_lock(&dir->i_mutex);
 714         bh = osd_ldiskfs_find_entry(dir, child, &de, NULL);
 715         mutex_unlock(&dir->i_mutex);
 716
 717         if (bh == NULL)
 718                 RETURN(-ENOENT);
 719
 720         osd_id_gen(id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
 721         brelse(bh);
 722
 723         inode = osd_iget(info, dev, id);
 724         if (IS_ERR(inode))
 725                 RETURN(PTR_ERR(inode));
 726
 727         iput(inode);
 728         RETURN(0);
 729 }
 730
 731 int osd_obj_map_insert(struct osd_thread_info *info,
 732                        struct osd_device *osd,
 733                        const struct lu_fid *fid,
 734                        const struct osd_inode_id *id,
 735                        struct thandle *th)
 736 {
 737         struct osd_obj_map      *map;
 738         struct osd_obj_seq      *osd_seq;
 739         struct dentry           *d;
 740         struct ost_id           *ostid = &info->oti_ostid;
 741         int                     dirn, rc = 0;
 742         char                    name[32];
 743         ENTRY;
 744
 745         map = osd->od_ost_map;
 746         LASSERT(map);
 747
 748         /* map fid to seq:objid */
 749         fid_ostid_pack(fid, ostid);
 750
 751         osd_seq = osd_seq_load(osd, ostid->oi_seq);
 752         if (IS_ERR(osd_seq))
 753                 RETURN(PTR_ERR(osd_seq));
 754
 755         dirn = ostid->oi_id & (osd_seq->oos_subdir_count - 1);
 756         d = osd_seq->oos_dirs[dirn];
 757         LASSERT(d);
 758
 759         osd_oid_name(name, fid, ostid->oi_id);
 760         rc = osd_obj_add_entry(info, osd, d, name, id, th);
 761
 762         RETURN(rc);
 763 }
 764
 765 int osd_obj_map_delete(struct osd_thread_info *info, struct osd_device *osd,
 766                        const struct lu_fid *fid, struct thandle *th)
 767 {
 768         struct osd_obj_map      *map;
 769         struct osd_obj_seq      *osd_seq;
 770         struct dentry           *d;
 771         struct ost_id           *ostid = &info->oti_ostid;
 772         int                     dirn, rc = 0;
 773         char                    name[32];
 774         ENTRY;
 775
 776         map = osd->od_ost_map;
 777         LASSERT(map);
 778
 779         /* map fid to seq:objid */
 780         fid_ostid_pack(fid, ostid);
 781
 782         osd_seq = osd_seq_load(osd, ostid->oi_seq);
 783         if (IS_ERR(osd_seq))
 784                 GOTO(cleanup, rc = PTR_ERR(osd_seq));
 785
 786         dirn = ostid->oi_id & (osd_seq->oos_subdir_count - 1);
 787         d = osd_seq->oos_dirs[dirn];
 788         LASSERT(d);
 789
 790         osd_oid_name(name, fid, ostid->oi_id);
 791         rc = osd_obj_del_entry(info, osd, d, name, th);
 792 cleanup:
 793         RETURN(rc);
 794 }
 795
 796 int osd_obj_spec_insert(struct osd_thread_info *info, struct osd_device *osd,
 797                         const struct lu_fid *fid,
 798                         const struct osd_inode_id *id,
 799                         struct thandle *th)
 800 {
 801         struct osd_obj_map      *map = osd->od_ost_map;
 802         struct dentry           *root = osd_sb(osd)->s_root;
 803         char                    *name;
 804         int                     rc = 0;
 805         ENTRY;
 806
 807         if (fid_is_last_id(fid)) {
 808                 struct osd_obj_seq      *osd_seq;
 809
 810                 /* on creation of LAST_ID we create O/<seq> hierarchy */
 811                 LASSERT(map);
 812                 osd_seq = osd_seq_load(osd, fid_seq(fid));
 813                 if (IS_ERR(osd_seq))
 814                         RETURN(PTR_ERR(osd_seq));
 815                 rc = osd_obj_add_entry(info, osd, osd_seq->oos_root,
 816                                        "LAST_ID", id, th);
 817         } else {
 818                 name = osd_lf_fid2name(fid);
 819                 if (name == NULL)
 820                         CWARN("UNKNOWN COMPAT FID "DFID"\n", PFID(fid));
 821                 else if (name[0])
 822                         rc = osd_obj_add_entry(info, osd, root, name, id, th);
 823         }
 824
 825         RETURN(rc);
 826 }
 827
 828 int osd_obj_spec_lookup(struct osd_thread_info *info, struct osd_device *osd,
 829                         const struct lu_fid *fid, struct osd_inode_id *id)
 830 {
 831         struct dentry   *root;
 832         struct dentry   *dentry;
 833         struct inode    *inode;
 834         char            *name;
 835         int             rc = -ENOENT;
 836         ENTRY;
 837
 838         if (fid_is_last_id(fid)) {
 839                 struct osd_obj_seq *osd_seq;
 840
 841                 osd_seq = osd_seq_load(osd, fid_seq(fid));
 842                 if (IS_ERR(osd_seq))
 843                         RETURN(PTR_ERR(osd_seq));
 844                 root = osd_seq->oos_root;
 845                 name = "LAST_ID";
 846         } else {
 847                 root = osd_sb(osd)->s_root;
 848                 name = osd_lf_fid2name(fid);
 849                 if (name == NULL || strlen(name) == 0)
 850                         RETURN(-ENOENT);
 851         }
 852
 853         dentry = ll_lookup_one_len(name, root, strlen(name));
 854         if (!IS_ERR(dentry)) {
 855                 inode = dentry->d_inode;
 856                 if (inode) {
 857                         if (is_bad_inode(inode)) {
 858                                 rc = -EIO;
 859                         } else {
 860                                 osd_id_gen(id, inode->i_ino,
 861                                            inode->i_generation);
 862                                 rc = 0;
 863                         }
 864                 }
 865                 /* if dentry is accessible after osd_compat_spec_insert it
 866                  * will still contain NULL inode, so don't keep it in cache */
 867                 d_invalidate(dentry);
 868                 dput(dentry);
 869         }
 870
 871         RETURN(rc);
 872 }