lustre/llite/namei.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (c) 2002, 2003 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   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 #include <linux/fs.h>
  23 #include <linux/sched.h>
  24 #include <linux/mm.h>
  25 #include <linux/smp_lock.h>
  26 #include <linux/quotaops.h>
  27 #include <linux/highmem.h>
  28 #include <linux/pagemap.h>
  29
  30 #define DEBUG_SUBSYSTEM S_LLITE
  31
  32 #include <obd_support.h>
  33 #include <lustre_lite.h>
  34 #include <lustre_dlm.h>
  35 #include <linux/lustre_version.h>
  36 #include "llite_internal.h"
  37
  38 /* methods */
  39
  40 /* called from iget{4,5_locked}->find_inode() under inode_lock spinlock */
  41 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
  42 static int ll_test_inode(struct inode *inode, unsigned long ino, void *opaque)
  43 #else
  44 static int ll_test_inode(struct inode *inode, void *opaque)
  45 #endif
  46 {
  47         static int last_ino, last_gen, last_count;
  48         struct lustre_md *md = opaque;
  49
  50         if (!(md->body->valid & (OBD_MD_FLGENER | OBD_MD_FLID))) {
  51                 CERROR("MDS body missing inum or generation\n");
  52                 return 0;
  53         }
  54
  55         if (last_ino == md->body->ino && last_gen == md->body->generation &&
  56             last_count < 500) {
  57                 last_count++;
  58         } else {
  59                 if (last_count > 1)
  60                         CDEBUG(D_VFSTRACE, "compared %u/%u %u times\n",
  61                                last_ino, last_gen, last_count);
  62                 last_count = 0;
  63                 last_ino = md->body->ino;
  64                 last_gen = md->body->generation;
  65                 CDEBUG(D_VFSTRACE,
  66                        "comparing inode %p ino %lu/%u to body "LPU64"/%u\n",
  67                        inode, inode->i_ino, inode->i_generation,
  68                        md->body->ino, md->body->generation);
  69         }
  70
  71 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
  72         if (inode->i_ino != md->body->ino)
  73                 return 0;
  74 #endif
  75         if (inode->i_generation != md->body->generation) {
  76                 struct ll_sb_info *sbi = ll_i2sbi(inode);
  77                 struct ll_inode_info *lli = ll_i2info(inode);
  78
  79                 if (inode->i_state & (I_FREEING | I_CLEAR))
  80                         return 0;
  81                 if (inode->i_nlink == 0)
  82                         return 0;
  83
  84                 /* add "duplicate" inode into deathrow for destroy */
  85                 spin_lock(&sbi->ll_deathrow_lock);
  86                 if (list_empty(&lli->lli_dead_list)) {
  87                         atomic_inc(&inode->i_count);
  88                         list_add(&lli->lli_dead_list, &sbi->ll_deathrow);
  89                 }
  90                 spin_unlock(&sbi->ll_deathrow_lock);
  91
  92                 return 0;
  93         }
  94
  95         /* Apply the attributes in 'opaque' to this inode */
  96         if (!(inode->i_state & (I_FREEING | I_CLEAR)))
  97                 ll_update_inode(inode, md);
  98         return 1;
  99 }
 100
 101 extern struct dentry_operations ll_d_ops;
 102
 103 int ll_unlock(__u32 mode, struct lustre_handle *lockh)
 104 {
 105         ENTRY;
 106
 107         ldlm_lock_decref(lockh, mode);
 108
 109         RETURN(0);
 110 }
 111
 112 /* Get an inode by inode number (already instantiated by the intent lookup).
 113  * Returns inode or NULL
 114  */
 115 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
 116 int ll_set_inode(struct inode *inode, void *opaque)
 117 {
 118         ll_read_inode2(inode, opaque);
 119         return 0;
 120 }
 121
 122 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 123                       struct lustre_md *md)
 124 {
 125         struct inode *inode;
 126
 127         LASSERT(hash != 0);
 128         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
 129
 130         if (inode) {
 131                 if (inode->i_state & I_NEW)
 132                         unlock_new_inode(inode);
 133                 CDEBUG(D_VFSTRACE, "inode: %lu/%u(%p)\n", inode->i_ino,
 134                        inode->i_generation, inode);
 135         }
 136
 137         return inode;
 138 }
 139 #else
 140 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 141                       struct lustre_md *md)
 142 {
 143         struct inode *inode;
 144         LASSERT(hash != 0);
 145         inode = iget4(sb, hash, ll_test_inode, md);
 146         if (inode)
 147                 CDEBUG(D_VFSTRACE, "inode: %lu/%u(%p)\n", inode->i_ino,
 148                        inode->i_generation, inode);
 149         return inode;
 150 }
 151 #endif
 152
 153 int ll_mdc_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 154                         void *data, int flag)
 155 {
 156         int rc;
 157         struct lustre_handle lockh;
 158         ENTRY;
 159
 160         switch (flag) {
 161         case LDLM_CB_BLOCKING:
 162                 ldlm_lock2handle(lock, &lockh);
 163                 rc = ldlm_cli_cancel(&lockh);
 164                 if (rc < 0) {
 165                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 166                         RETURN(rc);
 167                 }
 168                 break;
 169         case LDLM_CB_CANCELING: {
 170                 struct inode *inode = ll_inode_from_lock(lock);
 171                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 172
 173                 /* Invalidate all dentries associated with this inode */
 174                 if (inode == NULL)
 175                         break;
 176
 177                 if (lock->l_resource->lr_name.name[0] != inode->i_ino ||
 178                     lock->l_resource->lr_name.name[1] != inode->i_generation) {
 179                         LDLM_ERROR(lock, "data mismatch with ino %lu/%u (%p)",
 180                                    inode->i_ino, inode->i_generation, inode);
 181                 }
 182
 183                 if (bits & MDS_INODELOCK_OPEN) {
 184                         int flags = 0;
 185                         switch (lock->l_req_mode) {
 186                         case LCK_CW:
 187                                 flags = FMODE_WRITE;
 188                                 break;
 189                         case LCK_PR:
 190                                 flags = FMODE_EXEC;
 191                                 if (!FMODE_EXEC)
 192                                         CERROR("open PR lock without FMODE_EXEC\n");
 193                                 break;
 194                         case LCK_CR:
 195                                 flags = FMODE_READ;
 196                                 break;
 197                         default:
 198                                 CERROR("Unexpected lock mode for OPEN lock "
 199                                        "%d, inode %ld\n", lock->l_req_mode,
 200                                        inode->i_ino);
 201                         }
 202                         ll_mdc_real_close(inode, flags);
 203                 }
 204
 205                 if (bits & MDS_INODELOCK_UPDATE)
 206                         clear_bit(LLI_F_HAVE_MDS_SIZE_LOCK,
 207                                   &(ll_i2info(inode)->lli_flags));
 208
 209                 if (S_ISDIR(inode->i_mode) &&
 210                      (bits & MDS_INODELOCK_UPDATE)) {
 211                         struct dentry *dentry, *tmp, *dir;
 212                         struct list_head *list;
 213
 214                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 215                                inode->i_ino);
 216                         truncate_inode_pages(inode->i_mapping, 0);
 217
 218                         /* Drop possible cached negative dentries */
 219                         list = &inode->i_dentry;
 220                         dir = NULL;
 221                         spin_lock(&dcache_lock);
 222
 223                         /* It is possible to have several dentries (with
 224                            racer?) */
 225                         while ((list = list->next) != &inode->i_dentry) {
 226                                 dir = list_entry(list, struct dentry, d_alias);
 227 #ifdef LUSTRE_KERNEL_VERSION
 228                                 if (!(dir->d_flags & DCACHE_LUSTRE_INVALID))
 229 #else
 230                                 if (!d_unhashed(dir))
 231 #endif
 232                                         break;
 233
 234                                 dir = NULL;
 235                         }
 236
 237                         if (dir) {
 238 restart:
 239                                 list_for_each_entry_safe(dentry, tmp,
 240                                                          &dir->d_subdirs,
 241                                                          d_child)
 242                                 {
 243                                         /* XXX Print some debug here? */
 244                                         if (!dentry->d_inode)
 245                                                 /* Negative dentry. If we were
 246                                                    dropping dcache lock, go
 247                                                    throught the list again */
 248                                                 if (ll_drop_dentry(dentry))
 249                                                         goto restart;
 250                                 }
 251                         }
 252                         spin_unlock(&dcache_lock);
 253                 }
 254
 255                 if (inode->i_sb->s_root &&
 256                     inode != inode->i_sb->s_root->d_inode &&
 257                     (bits & MDS_INODELOCK_LOOKUP))
 258                         ll_unhash_aliases(inode);
 259                 iput(inode);
 260                 break;
 261         }
 262         default:
 263                 LBUG();
 264         }
 265
 266         RETURN(0);
 267 }
 268
 269 int ll_mdc_cancel_unused(struct lustre_handle *conn, struct inode *inode,
 270                          int flags, void *opaque)
 271 {
 272         struct ldlm_res_id res_id =
 273                 { .name = {inode->i_ino, inode->i_generation} };
 274         struct obd_device *obddev = class_conn2obd(conn);
 275         ENTRY;
 276
 277         RETURN(ldlm_cli_cancel_unused(obddev->obd_namespace, &res_id, flags,
 278                                       opaque));
 279 }
 280
 281 /* Pack the required supplementary groups into the supplied groups array.
 282  * If we don't need to use the groups from the target inode(s) then we
 283  * instead pack one or more groups from the user's supplementary group
 284  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 285 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 286 {
 287         int i;
 288
 289         LASSERT(i1 != NULL);
 290         LASSERT(suppgids != NULL);
 291
 292         if (in_group_p(i1->i_gid))
 293                 suppgids[0] = i1->i_gid;
 294         else
 295                 suppgids[0] = -1;
 296
 297         if (i2) {
 298                 if (in_group_p(i2->i_gid))
 299                         suppgids[1] = i2->i_gid;
 300                 else
 301                         suppgids[1] = -1;
 302         } else {
 303                 suppgids[1] = -1;
 304         }
 305
 306         for (i = 0; i < current_ngroups; i++) {
 307                 if (suppgids[0] == -1) {
 308                         if (current_groups[i] != suppgids[1])
 309                                 suppgids[0] = current_groups[i];
 310                         continue;
 311                 }
 312                 if (suppgids[1] == -1) {
 313                         if (current_groups[i] != suppgids[0])
 314                                 suppgids[1] = current_groups[i];
 315                         continue;
 316                 }
 317                 break;
 318         }
 319 }
 320
 321 int ll_prepare_mdc_op_data(struct mdc_op_data *data, struct inode *i1,
 322                             struct inode *i2, const char *name, int namelen,
 323                             int mode)
 324 {
 325         LASSERT(i1);
 326
 327         if (namelen > ll_i2sbi(i1)->ll_namelen)
 328                 return -ENAMETOOLONG;
 329         ll_i2gids(data->suppgids, i1, i2);
 330         ll_inode2fid(&data->fid1, i1);
 331
 332         if (i2)
 333                 ll_inode2fid(&data->fid2, i2);
 334         else
 335                 memset(&data->fid2, 0, sizeof(data->fid2));
 336
 337         data->name = name;
 338         data->namelen = namelen;
 339         data->create_mode = mode;
 340         data->mod_time = CURRENT_SECONDS;
 341
 342         return 0;
 343 }
 344
 345 static void ll_d_add(struct dentry *de, struct inode *inode)
 346 {
 347         CDEBUG(D_DENTRY, "adding inode %p to dentry %p\n", inode, de);
 348         /* d_instantiate */
 349         if (!list_empty(&de->d_alias)) {
 350                 spin_unlock(&dcache_lock);
 351                 CERROR("dentry %.*s %p alias next %p, prev %p\n",
 352                        de->d_name.len, de->d_name.name, de,
 353                        de->d_alias.next, de->d_alias.prev);
 354                 LBUG();
 355         }
 356         if (inode)
 357                 list_add(&de->d_alias, &inode->i_dentry);
 358         de->d_inode = inode;
 359
 360         /* d_rehash */
 361         if (!d_unhashed(de)) {
 362                 spin_unlock(&dcache_lock);
 363                 CERROR("dentry %.*s %p hash next %p\n",
 364                        de->d_name.len, de->d_name.name, de, de->d_hash.next);
 365                 LBUG();
 366         }
 367         __d_rehash(de, 0);
 368 }
 369
 370 /* Search "inode"'s alias list for a dentry that has the same name and parent
 371  * as de.  If found, return it.  If not found, return de.
 372  * Lustre can't use d_add_unique because don't unhash aliases for directory
 373  * in ll_revalidate_it.  After revaliadate inode will be have hashed aliases
 374  * and it triggers BUG_ON in d_instantiate_unique (bug #10954).
 375  */
 376 struct dentry *ll_find_alias(struct inode *inode, struct dentry *de)
 377 {
 378         struct list_head *tmp;
 379         struct dentry *dentry;
 380         struct dentry *last_discon = NULL;
 381
 382         spin_lock(&dcache_lock);
 383         list_for_each(tmp, &inode->i_dentry) {
 384                 dentry = list_entry(tmp, struct dentry, d_alias);
 385
 386                 /* We are called here with 'de' already on the aliases list. */
 387                 if (unlikely(dentry == de)) {
 388                         CERROR("whoops\n");
 389                         continue;
 390                 }
 391
 392                 if (dentry->d_flags & DCACHE_DISCONNECTED) {
 393                         LASSERT(last_discon == NULL);
 394                         last_discon = dentry;
 395                         continue;
 396                 }
 397
 398                 if (dentry->d_parent != de->d_parent)
 399                         continue;
 400
 401                 if (dentry->d_name.hash != de->d_name.hash)
 402                         continue;
 403
 404                 if (dentry->d_name.len != de->d_name.len)
 405                         continue;
 406
 407                 if (memcmp(dentry->d_name.name, de->d_name.name,
 408                            de->d_name.len) != 0)
 409                         continue;
 410
 411                 dget_locked(dentry);
 412                 lock_dentry(dentry);
 413                 __d_drop(dentry);
 414 #ifdef LUSTRE_KERNEL_VERSION
 415                 dentry->d_flags &= ~DCACHE_LUSTRE_INVALID;
 416 #endif
 417                 unlock_dentry(dentry);
 418                 __d_rehash(dentry, 0); /* avoid taking dcache_lock inside */
 419                 spin_unlock(&dcache_lock);
 420                 iput(inode);
 421                 CDEBUG(D_DENTRY, "alias dentry %.*s (%p) parent %p inode %p "
 422                        "refc %d\n", de->d_name.len, de->d_name.name, de,
 423                        de->d_parent, de->d_inode, atomic_read(&de->d_count));
 424                 return dentry;
 425         }
 426         if (last_discon) {
 427                  CDEBUG(D_DENTRY, "Reuse disconnected dentry %p inode %p "
 428                         "refc %d\n", last_discon, last_discon->d_inode,
 429                         atomic_read(&last_discon->d_count));
 430                  dget_locked(last_discon);
 431                  spin_unlock(&dcache_lock);
 432                  d_rehash(de);
 433                  d_move(last_discon, de);
 434                  iput(inode);
 435                  return last_discon;
 436         }
 437
 438         ll_d_add(de, inode);
 439
 440         spin_unlock(&dcache_lock);
 441
 442         return de;
 443 }
 444
 445 static int lookup_it_finish(struct ptlrpc_request *request, int offset,
 446                             struct lookup_intent *it, void *data)
 447 {
 448         struct it_cb_data *icbd = data;
 449         struct dentry **de = icbd->icbd_childp;
 450         struct inode *parent = icbd->icbd_parent;
 451         struct ll_sb_info *sbi = ll_i2sbi(parent);
 452         struct inode *inode = NULL;
 453         int rc;
 454
 455         /* NB 1 request reference will be taken away by ll_intent_lock()
 456          * when I return */
 457         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 458                 ENTRY;
 459
 460                 rc = ll_prep_inode(sbi->ll_osc_exp, &inode, request, offset,
 461                                    (*de)->d_sb);
 462                 if (rc)
 463                         RETURN(rc);
 464
 465                 CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
 466                        inode, inode->i_ino, inode->i_generation);
 467                 mdc_set_lock_data(&it->d.lustre.it_lock_handle, inode);
 468
 469                 /* We used to query real size from OSTs here, but actually
 470                    this is not needed. For stat() calls size would be updated
 471                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 472                    2.4 and
 473                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 474                    Everybody else who needs correct file size would call
 475                    ll_glimpse_size or some equivalent themselves anyway.
 476                    Also see bug 7198. */
 477                 *de = ll_find_alias(inode, *de);
 478         } else {
 479                 ENTRY;
 480                 /* Check that parent has UPDATE lock. If there is none, we
 481                    cannot afford to hash this dentry (done by ll_d_add) as it
 482                    might get picked up later when UPDATE lock will appear */
 483                 if (ll_have_md_lock(parent, MDS_INODELOCK_UPDATE)) {
 484                         spin_lock(&dcache_lock);
 485                         ll_d_add(*de, inode);
 486                         spin_unlock(&dcache_lock);
 487                 } else {
 488                         /* We do not want to hash the dentry if don`t have a
 489                          * lock, but if this dentry is later used in d_move,
 490                          * we'd hit uninitialised list head d_hash, so we just
 491                          * do this to init d_hash field but leave dentry
 492                          * unhashed. (bug 10796). */
 493                         d_rehash(*de);
 494                         d_drop(*de);
 495                 }
 496         }
 497
 498         ll_set_dd(*de);
 499         (*de)->d_op = &ll_d_ops;
 500
 501         RETURN(0);
 502 }
 503
 504 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 505                                    struct lookup_intent *it, int lookup_flags)
 506 {
 507         struct dentry *save = dentry, *retval;
 508         struct mdc_op_data op_data;
 509         struct it_cb_data icbd;
 510         struct ptlrpc_request *req = NULL;
 511         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 512         int rc;
 513         ENTRY;
 514
 515         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 516                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 517                parent->i_generation, parent, LL_IT2STR(it));
 518
 519         if (d_mountpoint(dentry))
 520                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 521
 522         ll_frob_intent(&it, &lookup_it);
 523
 524         /* As do_lookup is called before follow_mount, root dentry may be left
 525          * not valid, revalidate it here. */
 526         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 527             (it->it_op & (IT_OPEN | IT_CREAT))) {
 528                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it);
 529                 if (rc)
 530                         RETURN(ERR_PTR(rc));
 531         }
 532
 533         icbd.icbd_childp = &dentry;
 534         icbd.icbd_parent = parent;
 535
 536         rc = ll_prepare_mdc_op_data(&op_data, parent, NULL, dentry->d_name.name,
 537                                     dentry->d_name.len, lookup_flags);
 538         if (rc)
 539                 RETURN(ERR_PTR(rc));
 540
 541         it->it_create_mode &= ~current->fs->umask;
 542
 543         rc = mdc_intent_lock(ll_i2mdcexp(parent), &op_data, NULL, 0, it,
 544                              lookup_flags, &req, ll_mdc_blocking_ast, 0);
 545
 546         if (rc < 0)
 547                 GOTO(out, retval = ERR_PTR(rc));
 548
 549         rc = lookup_it_finish(req, DLM_REPLY_REC_OFF, it, &icbd);
 550         if (rc != 0) {
 551                 ll_intent_release(it);
 552                 GOTO(out, retval = ERR_PTR(rc));
 553         }
 554
 555         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 556             !S_ISREG(dentry->d_inode->i_mode) &&
 557             !S_ISDIR(dentry->d_inode->i_mode)) {
 558                 ll_release_openhandle(dentry, it);
 559         }
 560         ll_lookup_finish_locks(it, dentry);
 561
 562         if (dentry == save)
 563                 GOTO(out, retval = NULL);
 564         else
 565                 GOTO(out, retval = dentry);
 566  out:
 567         if (req)
 568                 ptlrpc_req_finished(req);
 569         return retval;
 570 }
 571
 572 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 573 #ifdef LUSTRE_KERNEL_VERSION
 574 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 575                                    struct nameidata *nd)
 576 {
 577         struct dentry *de;
 578         ENTRY;
 579
 580         if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
 581                 de = ll_lookup_it(parent, dentry, &nd->intent, nd->flags);
 582         else
 583                 de = ll_lookup_it(parent, dentry, NULL, 0);
 584
 585         RETURN(de);
 586 }
 587 #else
 588 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 589                                         int lookup_flags)
 590 {
 591         struct lookup_intent *it;
 592
 593         OBD_ALLOC(it, sizeof(*it));
 594         if (!it)
 595                 return ERR_PTR(-ENOMEM);
 596
 597         if (lookup_flags & LOOKUP_OPEN) {
 598                 it->it_op = IT_OPEN;
 599                 if (lookup_flags & LOOKUP_CREATE)
 600                         it->it_op |= IT_CREAT;
 601                 it->it_create_mode = oit->create_mode;
 602                 it->it_flags = oit->flags;
 603         } else {
 604                 it->it_op = IT_GETATTR;
 605         }
 606
 607 #ifndef HAVE_FILE_IN_STRUCT_INTENT
 608                 /* Since there is no way to pass our intent to ll_file_open,
 609                  * just check the file is there. Actual open will be done
 610                  * in ll_file_open */
 611                 if (it->it_op & IT_OPEN)
 612                         it->it_op = IT_LOOKUP;
 613 #endif
 614
 615         return it;
 616 }
 617
 618 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 619                                    struct nameidata *nd)
 620 {
 621         struct dentry *de;
 622         ENTRY;
 623
 624         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 625                 struct lookup_intent *it;
 626
 627 #if defined(HAVE_FILE_IN_STRUCT_INTENT) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 628                 /* Did we came here from failed revalidate just to propagate
 629                  * its error? */
 630                 if (nd->flags & LOOKUP_OPEN)
 631                         if (IS_ERR(nd->intent.open.file))
 632                                 RETURN((struct dentry *)nd->intent.open.file);
 633 #endif
 634
 635                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 636                         it = ll_d2d(dentry)->lld_it;
 637                         ll_d2d(dentry)->lld_it = NULL;
 638                 } else {
 639                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 640                         if (IS_ERR(it))
 641                                 RETURN((struct dentry *)it);
 642                 }
 643
 644                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 645                 if (de)
 646                         dentry = de;
 647                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 648                         if (dentry->d_inode &&
 649                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 650 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 651                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 652                                         // We cannot call open here as it would
 653                                         // deadlock.
 654                                         ptlrpc_req_finished(
 655                                                        (struct ptlrpc_request *)
 656                                                           it->d.lustre.it_data);
 657                                 } else {
 658                                         struct file *filp;
 659                                         nd->intent.open.file->private_data = it;
 660                                         filp =lookup_instantiate_filp(nd,dentry,
 661                                                                       NULL);
 662 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 663 /* 2.6.1[456] have a bug in open_namei() that forgets to check
 664  * nd->intent.open.file for error, so we need to return it as lookup's result
 665  * instead */
 666                                         if (IS_ERR(filp)) {
 667                                                 if (de)
 668                                                         dput(de);
 669                                                 de = (struct dentry *) filp;
 670                                         }
 671 #endif
 672
 673                                 }
 674 #else /* HAVE_FILE_IN_STRUCT_INTENT */
 675                                 /* Release open handle as we have no way to
 676                                  * pass it to ll_file_open */
 677                                 ll_release_openhandle(dentry, it);
 678 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
 679                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 680                                 // XXX This can only reliably work on assumption
 681                                 // that there are NO hashed negative dentries.
 682                                 ll_d2d(dentry)->lld_it = it;
 683                                 it = NULL; /* Will be freed in ll_create_nd */
 684                                 /* We absolutely depend on ll_create_nd to be
 685                                  * called to not leak this intent and possible
 686                                  * data attached to it */
 687                         }
 688                 }
 689
 690                 if (it) {
 691                         ll_intent_release(it);
 692                         OBD_FREE(it, sizeof(*it));
 693                 }
 694         } else {
 695                 de = ll_lookup_it(parent, dentry, NULL, 0);
 696         }
 697
 698         RETURN(de);
 699 }
 700 #endif
 701 #endif
 702
 703 /* We depend on "mode" being set with the proper file type/umask by now */
 704 static struct inode *ll_create_node(struct inode *dir, const char *name,
 705                                     int namelen, const void *data, int datalen,
 706                                     int mode, __u64 extra,
 707                                     struct lookup_intent *it)
 708 {
 709         struct inode *inode = NULL;
 710         struct ptlrpc_request *request = NULL;
 711         struct ll_sb_info *sbi = ll_i2sbi(dir);
 712         int rc;
 713         ENTRY;
 714
 715         LASSERT(it && it->d.lustre.it_disposition);
 716
 717         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 718         request = it->d.lustre.it_data;
 719         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 720         rc = ll_prep_inode(sbi->ll_osc_exp, &inode, request, DLM_REPLY_REC_OFF,
 721                            dir->i_sb);
 722         if (rc)
 723                 GOTO(out, inode = ERR_PTR(rc));
 724
 725         LASSERT(list_empty(&inode->i_dentry));
 726
 727         /* We asked for a lock on the directory, but were granted a
 728          * lock on the inode.  Since we finally have an inode pointer,
 729          * stuff it in the lock. */
 730         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 731                inode, inode->i_ino, inode->i_generation);
 732         mdc_set_lock_data(&it->d.lustre.it_lock_handle, inode);
 733         EXIT;
 734  out:
 735         ptlrpc_req_finished(request);
 736         return inode;
 737 }
 738
 739 /*
 740  * By the time this is called, we already have created the directory cache
 741  * entry for the new file, but it is so far negative - it has no inode.
 742  *
 743  * We defer creating the OBD object(s) until open, to keep the intent and
 744  * non-intent code paths similar, and also because we do not have the MDS
 745  * inode number before calling ll_create_node() (which is needed for LOV),
 746  * so we would need to do yet another RPC to the MDS to store the LOV EA
 747  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 748  * lmm_size in datalen (the MDS still has code which will handle that).
 749  *
 750  * If the create succeeds, we fill in the inode information
 751  * with d_instantiate().
 752  */
 753 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 754                         struct lookup_intent *it)
 755 {
 756         struct inode *inode;
 757         struct ptlrpc_request *request = it->d.lustre.it_data;
 758         int rc = 0;
 759         ENTRY;
 760
 761         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 762                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 763                dir->i_generation, dir, LL_IT2STR(it));
 764
 765         rc = it_open_error(DISP_OPEN_CREATE, it);
 766         if (rc)
 767                 RETURN(rc);
 768
 769         mdc_store_inode_generation(request, DLM_INTENT_REC_OFF,
 770                                    DLM_REPLY_REC_OFF);
 771         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 772                                NULL, 0, mode, 0, it);
 773         if (IS_ERR(inode)) {
 774                 RETURN(PTR_ERR(inode));
 775         }
 776
 777         d_instantiate(dentry, inode);
 778         /* Negative dentry may be unhashed if parent does not have UPDATE lock,
 779          * but some callers, e.g. do_coredump, expect dentry to be hashed after
 780          * successful create. Hash it here. */
 781         spin_lock(&dcache_lock);
 782         if (d_unhashed(dentry))
 783                 __d_rehash(dentry, 0);
 784         spin_unlock(&dcache_lock);
 785         RETURN(0);
 786 }
 787
 788 static void ll_update_times(struct ptlrpc_request *request, int offset,
 789                             struct inode *inode)
 790 {
 791         struct mds_body *body = lustre_msg_buf(request->rq_repmsg, offset,
 792                                                sizeof(*body));
 793         LASSERT(body);
 794
 795         /* mtime is always updated with ctime, but can be set in past.
 796            As write and utime(2) may happen within 1 second, and utime's
 797            mtime has a priority over write's one, so take mtime from mds
 798            for the same ctimes. */
 799         if (body->valid & OBD_MD_FLCTIME &&
 800             body->ctime >= LTIME_S(inode->i_ctime)) {
 801                 LTIME_S(inode->i_ctime) = body->ctime;
 802
 803                 if (body->valid & OBD_MD_FLMTIME) {
 804                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
 805                                "to "LPU64"\n", inode->i_ino,
 806                                LTIME_S(inode->i_mtime), body->mtime);
 807                         LTIME_S(inode->i_mtime) = body->mtime;
 808                 }
 809         }
 810 }
 811
 812 static int ll_new_node(struct inode *dir, struct qstr *name,
 813                        const char *tgt, int mode,
 814                        int rdev, struct dentry *dchild)
 815 {
 816         struct ptlrpc_request *request = NULL;
 817         struct inode *inode = NULL;
 818         struct ll_sb_info *sbi = ll_i2sbi(dir);
 819         struct mdc_op_data op_data;
 820         int tgt_len = 0;
 821         int err;
 822
 823         ENTRY;
 824         if (unlikely(tgt != NULL))
 825                 tgt_len = strlen(tgt)+1;
 826
 827         err = ll_prepare_mdc_op_data(&op_data, dir, NULL, name->name,
 828                                      name->len, 0);
 829         if (err)
 830                 GOTO(err_exit, err);
 831
 832         err = mdc_create(sbi->ll_mdc_exp, &op_data, tgt, tgt_len,
 833                          mode, current->fsuid, current->fsgid,
 834                          current->cap_effective, rdev, &request);
 835         if (err)
 836                 GOTO(err_exit, err);
 837
 838         ll_update_times(request, REPLY_REC_OFF, dir);
 839
 840         if (dchild) {
 841                 err = ll_prep_inode(sbi->ll_osc_exp, &inode, request,
 842                                     REPLY_REC_OFF, dchild->d_sb);
 843                 if (err)
 844                      GOTO(err_exit, err);
 845
 846                 d_drop(dchild);
 847                 d_instantiate(dchild, inode);
 848                 EXIT;
 849         }
 850 err_exit:
 851         ptlrpc_req_finished(request);
 852
 853         return err;
 854 }
 855
 856
 857 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 858                             unsigned rdev, struct dentry *dchild)
 859 {
 860         int err;
 861         ENTRY;
 862
 863         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 864                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 865                mode, rdev);
 866
 867         mode &= ~current->fs->umask;
 868
 869         switch (mode & S_IFMT) {
 870         case 0:
 871                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 872         case S_IFREG:
 873         case S_IFCHR:
 874         case S_IFBLK:
 875         case S_IFIFO:
 876         case S_IFSOCK:
 877                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild);
 878                 break;
 879         case S_IFDIR:
 880                 err = -EPERM;
 881                 break;
 882         default:
 883                 err = -EINVAL;
 884         }
 885         RETURN(err);
 886 }
 887
 888 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 889 #ifndef LUSTRE_KERNEL_VERSION
 890 static int ll_create_nd(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd)
 891 {
 892         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 893         int rc;
 894
 895         if (!it)
 896                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 897
 898         ll_d2d(dentry)->lld_it = NULL;
 899
 900         /* Was there an error? Propagate it! */
 901         if (it->d.lustre.it_status) {
 902                 rc = it->d.lustre.it_status;
 903                 goto out;
 904         }
 905
 906         rc = ll_create_it(dir, dentry, mode, it);
 907 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 908         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 909                 nd->intent.open.file->private_data = it;
 910                 lookup_instantiate_filp(nd, dentry, NULL);
 911         }
 912 #else
 913         ll_release_openhandle(dentry,it);
 914 #endif
 915
 916 out:
 917         ll_intent_release(it);
 918         OBD_FREE(it, sizeof(*it));
 919
 920         return rc;
 921 }
 922 #else
 923 static int ll_create_nd(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd)
 924 {
 925
 926         if (!nd || !nd->intent.d.lustre.it_disposition)
 927                 /* No saved request? Just mknod the file */
 928                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 929
 930         return ll_create_it(dir, dentry, mode, &nd->intent);
 931 }
 932 #endif
 933 #endif
 934
 935 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 936                               const char *tgt, struct dentry *dchild)
 937 {
 938         int err;
 939         ENTRY;
 940
 941         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 942                name->len, name->name, dir->i_ino, dir->i_generation,
 943                dir, 3000, tgt);
 944
 945         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 946                           0, dchild);
 947         RETURN(err);
 948 }
 949
 950 static int ll_link_generic(struct inode *src,  struct inode *dir,
 951                            struct qstr *name, struct dentry *dchild)
 952 {
 953         struct ptlrpc_request *request = NULL;
 954         struct mdc_op_data op_data;
 955         int err;
 956         struct ll_sb_info *sbi = ll_i2sbi(dir);
 957
 958         ENTRY;
 959         CDEBUG(D_VFSTRACE,
 960                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
 961                src->i_ino, src->i_generation, src, dir->i_ino,
 962                dir->i_generation, dir, name->len, name->name);
 963
 964         err = ll_prepare_mdc_op_data(&op_data, src, dir, name->name,
 965                                      name->len, 0);
 966         if (err)
 967                 GOTO(out, err);
 968         err = mdc_link(sbi->ll_mdc_exp, &op_data, &request);
 969         if (err)
 970                GOTO(out, err);
 971
 972         if (dchild) {
 973                 d_drop(dchild);
 974         }
 975         ll_update_times(request, REPLY_REC_OFF, dir);
 976
 977         EXIT;
 978 out:
 979         ptlrpc_req_finished(request);
 980         RETURN(err);
 981 }
 982
 983 static int ll_mkdir_generic(struct inode *dir, struct qstr *name, int mode,
 984                             struct dentry *dchild)
 985
 986 {
 987         int err;
 988
 989         ENTRY;
 990         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 991                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 992
 993         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
 994         err = ll_new_node(dir, name, NULL, mode, 0, dchild);
 995
 996         RETURN(err);
 997 }
 998
 999 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1000                             struct qstr *name)
1001 {
1002         struct ptlrpc_request *request = NULL;
1003         struct mdc_op_data op_data;
1004         struct dentry *dentry;
1005         int rc;
1006         ENTRY;
1007         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1008                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1009
1010         /* Check if we have something mounted at the dir we are going to delete
1011          * In such a case there would always be dentry present. */
1012         if (dparent) {
1013                 dentry = d_lookup(dparent, name);
1014                 if (dentry) {
1015                         int mounted = d_mountpoint(dentry);
1016                         dput(dentry);
1017                         if (mounted)
1018                                 GOTO(out, rc = -EBUSY);
1019                 }
1020         }
1021
1022         rc = ll_prepare_mdc_op_data(&op_data, dir, NULL, name->name,
1023                                     name->len, S_IFDIR);
1024         if (rc)
1025                 GOTO(out, rc);
1026         rc = mdc_unlink(ll_i2sbi(dir)->ll_mdc_exp, &op_data, &request);
1027         if (rc)
1028                 GOTO(out, rc);
1029         ll_update_times(request, REPLY_REC_OFF, dir);
1030
1031         EXIT;
1032 out:
1033         ptlrpc_req_finished(request);
1034         return(rc);
1035 }
1036
1037 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1038 {
1039         struct mds_body *body;
1040         struct lov_mds_md *eadata;
1041         struct lov_stripe_md *lsm = NULL;
1042         struct obd_trans_info oti = { 0 };
1043         struct obdo *oa;
1044         int rc;
1045         ENTRY;
1046
1047         /* req is swabbed so this is safe */
1048         body = lustre_msg_buf(request->rq_repmsg, REPLY_REC_OFF, sizeof(*body));
1049
1050         if (!(body->valid & OBD_MD_FLEASIZE))
1051                 RETURN(0);
1052
1053         if (body->eadatasize == 0) {
1054                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1055                 GOTO(out, rc = -EPROTO);
1056         }
1057
1058         /* The MDS sent back the EA because we unlinked the last reference
1059          * to this file. Use this EA to unlink the objects on the OST.
1060          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1061          * check it is complete and sensible. */
1062         eadata = lustre_swab_repbuf(request, REPLY_REC_OFF + 1,
1063                                     body->eadatasize, NULL);
1064         LASSERT(eadata != NULL);
1065         if (eadata == NULL) {
1066                 CERROR("Can't unpack MDS EA data\n");
1067                 GOTO(out, rc = -EPROTO);
1068         }
1069
1070         rc = obd_unpackmd(ll_i2obdexp(dir), &lsm, eadata, body->eadatasize);
1071         if (rc < 0) {
1072                 CERROR("obd_unpackmd: %d\n", rc);
1073                 GOTO(out, rc);
1074         }
1075         LASSERT(rc >= sizeof(*lsm));
1076
1077         rc = obd_checkmd(ll_i2obdexp(dir), ll_i2mdcexp(dir), lsm);
1078         if (rc)
1079                 GOTO(out_free_memmd, rc);
1080
1081         oa = obdo_alloc();
1082         if (oa == NULL)
1083                 GOTO(out_free_memmd, rc = -ENOMEM);
1084
1085         oa->o_id = lsm->lsm_object_id;
1086         oa->o_mode = body->mode & S_IFMT;
1087         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE;
1088
1089         if (body->valid & OBD_MD_FLCOOKIE) {
1090                 oa->o_valid |= OBD_MD_FLCOOKIE;
1091                 oti.oti_logcookies =
1092                         lustre_msg_buf(request->rq_repmsg, REPLY_REC_OFF + 2,
1093                                        sizeof(struct llog_cookie) *
1094                                        lsm->lsm_stripe_count);
1095                 if (oti.oti_logcookies == NULL) {
1096                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1097                         body->valid &= ~OBD_MD_FLCOOKIE;
1098                 }
1099         }
1100
1101         rc = obd_destroy(ll_i2obdexp(dir), oa, lsm, &oti, ll_i2mdcexp(dir));
1102         obdo_free(oa);
1103         if (rc)
1104                 CERROR("obd destroy objid "LPX64" error %d\n",
1105                        lsm->lsm_object_id, rc);
1106  out_free_memmd:
1107         obd_free_memmd(ll_i2obdexp(dir), &lsm);
1108  out:
1109         return rc;
1110 }
1111
1112 static int ll_unlink_generic(struct inode * dir, struct qstr *name)
1113 {
1114         struct ptlrpc_request *request = NULL;
1115         struct mdc_op_data op_data;
1116         int rc;
1117         ENTRY;
1118
1119         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1120                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1121
1122         rc = ll_prepare_mdc_op_data(&op_data, dir, NULL, name->name,
1123                                     name->len, 0);
1124         if (rc)
1125                 GOTO(out, rc);
1126         rc = mdc_unlink(ll_i2sbi(dir)->ll_mdc_exp, &op_data, &request);
1127         if (rc)
1128                 GOTO(out, rc);
1129
1130         ll_update_times(request, REPLY_REC_OFF, dir);
1131
1132         rc = ll_objects_destroy(request, dir);
1133         if (rc)
1134                 GOTO(out, rc);
1135         EXIT;
1136  out:
1137         ptlrpc_req_finished(request);
1138         return(rc);
1139 }
1140
1141 static int ll_rename_generic(struct inode *src, struct qstr *src_name,
1142                              struct inode *tgt, struct qstr *tgt_name)
1143 {
1144         struct ptlrpc_request *request = NULL;
1145         struct ll_sb_info *sbi = ll_i2sbi(src);
1146         struct mdc_op_data op_data;
1147         int err;
1148
1149         ENTRY;
1150         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1151                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1152                src->i_ino, src->i_generation, src, tgt_name->len,
1153                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1154
1155         err = ll_prepare_mdc_op_data(&op_data, src, tgt, NULL, 0, 0);
1156         if (err)
1157                 GOTO(out, err);
1158         err = mdc_rename(sbi->ll_mdc_exp, &op_data,
1159                          src_name->name, src_name->len,
1160                          tgt_name->name, tgt_name->len, &request);
1161         if (err)
1162                 GOTO(out, err);
1163         ll_update_times(request, REPLY_REC_OFF, src);
1164         ll_update_times(request, REPLY_REC_OFF, tgt);
1165         err = ll_objects_destroy(request, src);
1166         if (err)
1167                 GOTO(out, err);
1168
1169         EXIT;
1170 out:
1171         ptlrpc_req_finished(request);
1172
1173         return(err);
1174 }
1175
1176 #ifdef LUSTRE_KERNEL_VERSION
1177 static int ll_mknod_raw(struct nameidata *nd, int mode, dev_t rdev)
1178 {
1179         return ll_mknod_generic(nd->dentry->d_inode, &nd->last, mode,rdev,NULL);
1180 }
1181 static int ll_rename_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1182 {
1183         return ll_rename_generic(srcnd->dentry->d_inode, &srcnd->last,
1184                                  tgtnd->dentry->d_inode, &tgtnd->last);
1185 }
1186 static int ll_link_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1187 {
1188         return ll_link_generic(srcnd->dentry->d_inode, tgtnd->dentry->d_inode,
1189                                &tgtnd->last, NULL);
1190 }
1191 static int ll_symlink_raw(struct nameidata *nd, const char *tgt)
1192 {
1193         return ll_symlink_generic(nd->dentry->d_inode, &nd->last, tgt, NULL);
1194 }
1195 static int ll_rmdir_raw(struct nameidata *nd)
1196 {
1197         return ll_rmdir_generic(nd->dentry->d_inode, nd->dentry, &nd->last);
1198 }
1199 static int ll_mkdir_raw(struct nameidata *nd, int mode)
1200 {
1201         return ll_mkdir_generic(nd->dentry->d_inode, &nd->last, mode, NULL);
1202 }
1203 static int ll_unlink_raw(struct nameidata *nd)
1204 {
1205         return ll_unlink_generic(nd->dentry->d_inode, &nd->last);
1206 }
1207 #endif
1208
1209 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1210                     ll_dev_t rdev)
1211 {
1212         return ll_mknod_generic(dir, &dchild->d_name, mode,
1213                                 old_encode_dev(rdev), dchild);
1214 }
1215
1216 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1217 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1218 {
1219         return ll_unlink_generic(dir, &dentry->d_name);
1220 }
1221 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1222 {
1223         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1224 }
1225 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1226 {
1227         return ll_rmdir_generic(dir, NULL, &dentry->d_name);
1228 }
1229 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1230                       const char *oldname)
1231 {
1232         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1233 }
1234 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1235                    struct dentry *new_dentry)
1236 {
1237         return ll_link_generic(old_dentry->d_inode, dir,
1238                                &new_dentry->d_name, new_dentry);
1239 }
1240 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1241                      struct inode *new_dir, struct dentry *new_dentry)
1242 {
1243         return ll_rename_generic(old_dir, &old_dentry->d_name, new_dir,
1244                                  &new_dentry->d_name);
1245 }
1246 #endif
1247
1248 struct inode_operations ll_dir_inode_operations = {
1249 #ifdef LUSTRE_KERNEL_VERSION
1250         .link_raw           = ll_link_raw,
1251         .unlink_raw         = ll_unlink_raw,
1252         .symlink_raw        = ll_symlink_raw,
1253         .mkdir_raw          = ll_mkdir_raw,
1254         .rmdir_raw          = ll_rmdir_raw,
1255         .mknod_raw          = ll_mknod_raw,
1256         .rename_raw         = ll_rename_raw,
1257         .setattr            = ll_setattr,
1258         .setattr_raw        = ll_setattr_raw,
1259 #endif
1260         .mknod              = ll_mknod,
1261 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
1262         .create_it          = ll_create_it,
1263         .lookup_it          = ll_lookup_it,
1264         .revalidate_it      = ll_inode_revalidate_it,
1265 #else
1266         .lookup             = ll_lookup_nd,
1267         .create             = ll_create_nd,
1268         /* We need all these non-raw things for NFSD, to not patch it. */
1269         .unlink             = ll_unlink,
1270         .mkdir              = ll_mkdir,
1271         .rmdir              = ll_rmdir,
1272         .symlink            = ll_symlink,
1273         .link               = ll_link,
1274         .rename             = ll_rename,
1275         .setattr            = ll_setattr,
1276         .getattr            = ll_getattr,
1277 #endif
1278         .permission         = ll_inode_permission,
1279         .setxattr           = ll_setxattr,
1280         .getxattr           = ll_getxattr,
1281         .listxattr          = ll_listxattr,
1282         .removexattr        = ll_removexattr,
1283 };
1284
1285 struct inode_operations ll_special_inode_operations = {
1286 #ifdef LUSTRE_KERNEL_VERSION
1287         .setattr_raw    = ll_setattr_raw,
1288 #endif
1289         .setattr        = ll_setattr,
1290 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1291         .getattr        = ll_getattr,
1292 #else
1293         .revalidate_it  = ll_inode_revalidate_it,
1294 #endif
1295         .permission     = ll_inode_permission,
1296         .setxattr       = ll_setxattr,
1297         .getxattr       = ll_getxattr,
1298         .listxattr      = ll_listxattr,
1299         .removexattr    = ll_removexattr,
1300 };