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_fid.h>
  34 #include <lustre_lite.h>
  35 #include <lustre_dlm.h>
  36 #include <lustre_ver.h>
  37 #include <lustre_mdc.h>
  38 #include "llite_internal.h"
  39
  40 /* methods */
  41 extern struct dentry_operations ll_d_ops;
  42
  43 /*
  44  * Check if we have something mounted at the named dchild.
  45  * In such a case there would always be dentry present.
  46  */
  47 static int ll_d_mountpoint(struct dentry *dparent, struct dentry *dchild,
  48                            struct qstr *name)
  49 {
  50         int mounted = 0;
  51
  52         if (unlikely(dchild)) {
  53                 mounted = d_mountpoint(dchild);
  54         } else if (dparent) {
  55                 dchild = d_lookup(dparent, name);
  56                 if (dchild) {
  57                         mounted = d_mountpoint(dchild);
  58                         dput(dchild);
  59                 }
  60         }
  61         return mounted;
  62 }
  63
  64 int ll_unlock(__u32 mode, struct lustre_handle *lockh)
  65 {
  66         ENTRY;
  67
  68         ldlm_lock_decref(lockh, mode);
  69
  70         RETURN(0);
  71 }
  72
  73 /*
  74  * Get an inode by inode number (already instantiated by the intent lookup).
  75  * Returns inode or NULL
  76  */
  77 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  78 struct inode *ll_iget(struct super_block *sb, ino_t hash,
  79                       struct lustre_md *md)
  80 {
  81         struct ll_inode_info *lli;
  82         struct inode *inode;
  83         LASSERT(hash != 0);
  84
  85         inode = iget_locked(sb, hash);
  86         if (inode) {
  87                 if (inode->i_state & I_NEW) {
  88                         lli = ll_i2info(inode);
  89                         ll_read_inode2(inode, md);
  90                         unlock_new_inode(inode);
  91                 } else {
  92                         if (!(inode->i_state & (I_FREEING | I_CLEAR)))
  93                                 ll_update_inode(inode, md);
  94                 }
  95                 CDEBUG(D_VFSTRACE, "inode: %lu/%u(%p)\n",
  96                        inode->i_ino, inode->i_generation, inode);
  97         }
  98
  99         return inode;
 100 }
 101 #else
 102 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 103                       struct lustre_md *md)
 104 {
 105         struct inode *inode;
 106         LASSERT(hash != 0);
 107
 108         inode = iget4(sb, hash, NULL, md);
 109         if (inode) {
 110                 if (!(inode->i_state & (I_FREEING | I_CLEAR)))
 111                         ll_update_inode(inode, md);
 112
 113                 CDEBUG(D_VFSTRACE, "inode: %lu/%u(%p)\n",
 114                        inode->i_ino, inode->i_generation, inode);
 115         }
 116         return inode;
 117 }
 118 #endif
 119
 120 static void ll_drop_negative_dentry(struct inode *dir)
 121 {
 122         struct dentry *dentry, *tmp_alias, *tmp_subdir;
 123
 124         spin_lock(&dcache_lock);
 125 restart:
 126         list_for_each_entry_safe(dentry, tmp_alias,
 127                                  &dir->i_dentry,d_alias) {
 128                 if (!list_empty(&dentry->d_subdirs)) {
 129                         struct dentry *child;
 130                         list_for_each_entry_safe(child, tmp_subdir,
 131                                                  &dentry->d_subdirs,
 132                                                  d_child) {
 133                                 /* XXX Print some debug here? */
 134                                 if (!child->d_inode)
 135                                 /* Negative dentry. If we were
 136                                    dropping dcache lock, go
 137                                    throught the list again */
 138                                         if (ll_drop_dentry(child))
 139                                                 goto restart;
 140                         }
 141                 }
 142         }
 143         spin_unlock(&dcache_lock);
 144 }
 145
 146
 147 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 148                        void *data, int flag)
 149 {
 150         int rc;
 151         struct lustre_handle lockh;
 152         ENTRY;
 153
 154         switch (flag) {
 155         case LDLM_CB_BLOCKING:
 156                 ldlm_lock2handle(lock, &lockh);
 157                 rc = ldlm_cli_cancel(&lockh);
 158                 if (rc < 0) {
 159                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 160                         RETURN(rc);
 161                 }
 162                 break;
 163         case LDLM_CB_CANCELING: {
 164                 struct inode *inode = ll_inode_from_lock(lock);
 165                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 166                 struct lu_fid *fid;
 167
 168                 /* Invalidate all dentries associated with this inode */
 169                 if (inode == NULL)
 170                         break;
 171
 172                 fid = ll_inode2fid(inode);
 173                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
 174                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
 175                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
 176                         LDLM_ERROR(lock, "data mismatch with object "
 177                                    DFID" (%p)", PFID(fid), inode);
 178                 }
 179
 180                 if (bits & MDS_INODELOCK_OPEN) {
 181                         int flags = 0;
 182                         switch (lock->l_req_mode) {
 183                         case LCK_CW:
 184                                 flags = FMODE_WRITE;
 185                                 break;
 186                         case LCK_PR:
 187                                 flags = FMODE_EXEC;
 188                                 break;
 189                         case LCK_CR:
 190                                 flags = FMODE_READ;
 191                                 break;
 192                         default:
 193                                 CERROR("Unexpected lock mode for OPEN lock "
 194                                        "%d, inode %ld\n", lock->l_req_mode,
 195                                        inode->i_ino);
 196                         }
 197                         ll_md_real_close(inode, flags);
 198                 }
 199
 200                 if (bits & MDS_INODELOCK_UPDATE)
 201                         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 202
 203                 if (S_ISDIR(inode->i_mode) &&
 204                      (bits & MDS_INODELOCK_UPDATE)) {
 205                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 206                                inode->i_ino);
 207                         truncate_inode_pages(inode->i_mapping, 0);
 208                         ll_drop_negative_dentry(inode);
 209                 }
 210
 211                 if (inode->i_sb->s_root &&
 212                     inode != inode->i_sb->s_root->d_inode &&
 213                     (bits & MDS_INODELOCK_LOOKUP))
 214                         ll_unhash_aliases(inode);
 215                 iput(inode);
 216                 break;
 217         }
 218         default:
 219                 LBUG();
 220         }
 221
 222         RETURN(0);
 223 }
 224
 225 /* Pack the required supplementary groups into the supplied groups array.
 226  * If we don't need to use the groups from the target inode(s) then we
 227  * instead pack one or more groups from the user's supplementary group
 228  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 229 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 230 {
 231         int i;
 232
 233         LASSERT(i1 != NULL);
 234         LASSERT(suppgids != NULL);
 235
 236         if (in_group_p(i1->i_gid))
 237                 suppgids[0] = i1->i_gid;
 238         else
 239                 suppgids[0] = -1;
 240
 241         if (i2) {
 242                 if (in_group_p(i2->i_gid))
 243                         suppgids[1] = i2->i_gid;
 244                 else
 245                         suppgids[1] = -1;
 246         } else {
 247                 suppgids[1] = -1;
 248         }
 249
 250         for (i = 0; i < current_ngroups; i++) {
 251                 if (suppgids[0] == -1) {
 252                         if (current_groups[i] != suppgids[1])
 253                                 suppgids[0] = current_groups[i];
 254                         continue;
 255                 }
 256                 if (suppgids[1] == -1) {
 257                         if (current_groups[i] != suppgids[0])
 258                                 suppgids[1] = current_groups[i];
 259                         continue;
 260                 }
 261                 break;
 262         }
 263 }
 264
 265 static void ll_d_add(struct dentry *de, struct inode *inode)
 266 {
 267         CDEBUG(D_DENTRY, "adding inode %p to dentry %p\n", inode, de);
 268         /* d_instantiate */
 269         if (!list_empty(&de->d_alias)) {
 270                 spin_unlock(&dcache_lock);
 271                 CERROR("dentry %.*s %p alias next %p, prev %p\n",
 272                        de->d_name.len, de->d_name.name, de,
 273                        de->d_alias.next, de->d_alias.prev);
 274                 LBUG();
 275         }
 276         if (inode)
 277                 list_add(&de->d_alias, &inode->i_dentry);
 278         de->d_inode = inode;
 279
 280         /* d_rehash */
 281         if (!d_unhashed(de)) {
 282                 spin_unlock(&dcache_lock);
 283                 CERROR("dentry %.*s %p hash next %p\n",
 284                        de->d_name.len, de->d_name.name, de, de->d_hash.next);
 285                 LBUG();
 286         }
 287         __d_rehash(de, 0);
 288 }
 289
 290 /* Search "inode"'s alias list for a dentry that has the same name and parent
 291  * as de.  If found, return it.  If not found, return de.
 292  * Lustre can't use d_add_unique because don't unhash aliases for directory
 293  * in ll_revalidate_it.  After revaliadate inode will be have hashed aliases
 294  * and it triggers BUG_ON in d_instantiate_unique (bug #10954).
 295  */
 296 struct dentry *ll_find_alias(struct inode *inode, struct dentry *de)
 297 {
 298         struct list_head *tmp;
 299         struct dentry *dentry;
 300         struct dentry *last_discon = NULL;
 301
 302         spin_lock(&dcache_lock);
 303         list_for_each(tmp, &inode->i_dentry) {
 304                 dentry = list_entry(tmp, struct dentry, d_alias);
 305
 306                 /* We are called here with 'de' already on the aliases list. */
 307                 if (unlikely(dentry == de)) {
 308                         CERROR("whoops\n");
 309                         continue;
 310                 }
 311
 312                 if (dentry->d_flags & DCACHE_DISCONNECTED) {
 313                         LASSERT(last_discon == NULL);
 314                         last_discon = dentry;
 315                         continue;
 316                 }
 317
 318                 if (dentry->d_parent != de->d_parent)
 319                         continue;
 320
 321                 if (dentry->d_name.hash != de->d_name.hash)
 322                         continue;
 323
 324                 if (dentry->d_name.len != de->d_name.len)
 325                         continue;
 326
 327                 if (memcmp(dentry->d_name.name, de->d_name.name,
 328                            de->d_name.len) != 0)
 329                         continue;
 330
 331                 dget_locked(dentry);
 332                 lock_dentry(dentry);
 333                 __d_drop(dentry);
 334 #ifdef LUSTRE_KERNEL_VERSION
 335                 dentry->d_flags &= ~DCACHE_LUSTRE_INVALID;
 336 #endif
 337                 unlock_dentry(dentry);
 338                 __d_rehash(dentry, 0); /* avoid taking dcache_lock inside */
 339                 spin_unlock(&dcache_lock);
 340                 iput(inode);
 341                 CDEBUG(D_DENTRY, "alias dentry %.*s (%p) parent %p inode %p "
 342                        "refc %d\n", de->d_name.len, de->d_name.name, de,
 343                        de->d_parent, de->d_inode, atomic_read(&de->d_count));
 344                 return dentry;
 345         }
 346
 347         if (last_discon) {
 348                 CDEBUG(D_DENTRY, "Reuse disconnected dentry %p inode %p "
 349                         "refc %d\n", last_discon, last_discon->d_inode,
 350                         atomic_read(&last_discon->d_count));
 351                 __d_rehash(de, 0);
 352                 dget_locked(last_discon);
 353                 __d_move(last_discon, de);
 354                 spin_unlock(&dcache_lock);
 355                 d_rehash(de);
 356                 iput(inode);
 357                 return last_discon;
 358         }
 359
 360         ll_d_add(de, inode);
 361
 362         spin_unlock(&dcache_lock);
 363
 364         return de;
 365 }
 366
 367 static int lookup_it_finish(struct ptlrpc_request *request, int offset,
 368                             struct lookup_intent *it, void *data)
 369 {
 370         struct it_cb_data *icbd = data;
 371         struct dentry **de = icbd->icbd_childp;
 372         struct inode *parent = icbd->icbd_parent;
 373         struct ll_sb_info *sbi = ll_i2sbi(parent);
 374         struct inode *inode = NULL;
 375         int rc;
 376
 377         /* NB 1 request reference will be taken away by ll_intent_lock()
 378          * when I return */
 379         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 380                 ENTRY;
 381
 382                 rc = ll_prep_inode(&inode, request, offset,
 383                                    (*de)->d_sb);
 384                 if (rc)
 385                         RETURN(rc);
 386
 387                 CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
 388                        inode, inode->i_ino, inode->i_generation);
 389                 md_set_lock_data(sbi->ll_md_exp,
 390                                  &it->d.lustre.it_lock_handle, inode);
 391
 392                 /* We used to query real size from OSTs here, but actually
 393                    this is not needed. For stat() calls size would be updated
 394                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 395                    2.4 and
 396                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 397                    Everybody else who needs correct file size would call
 398                    ll_glimpse_size or some equivalent themselves anyway.
 399                    Also see bug 7198. */
 400
 401                 *de = ll_find_alias(inode, *de);
 402         } else {
 403                 ENTRY;
 404                 /* Check that parent has UPDATE lock. If there is none, we
 405                    cannot afford to hash this dentry (done by ll_d_add) as it
 406                    might get picked up later when UPDATE lock will appear */
 407                 if (ll_have_md_lock(parent, MDS_INODELOCK_UPDATE)) {
 408                         spin_lock(&dcache_lock);
 409                         ll_d_add(*de, inode);
 410                         spin_unlock(&dcache_lock);
 411                 } else {
 412                         (*de)->d_inode = NULL;
 413                         /* We do not want to hash the dentry if don`t have a
 414                          * lock, but if this dentry is later used in d_move,
 415                          * we'd hit uninitialised list head d_hash, so we just
 416                          * do this to init d_hash field but leave dentry
 417                          * unhashed. (bug 10796). */
 418                         d_rehash(*de);
 419                         d_drop(*de);
 420                 }
 421         }
 422
 423         ll_set_dd(*de);
 424         (*de)->d_op = &ll_d_ops;
 425
 426         RETURN(0);
 427 }
 428
 429 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 430                                    struct lookup_intent *it, int lookup_flags)
 431 {
 432         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 433         struct dentry *save = dentry, *retval;
 434         struct ptlrpc_request *req = NULL;
 435         struct md_op_data *op_data;
 436         struct it_cb_data icbd;
 437         __u32 opc;
 438         int rc;
 439         ENTRY;
 440
 441         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 442                 RETURN(ERR_PTR(-ENAMETOOLONG));
 443
 444         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 445                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 446                parent->i_generation, parent, LL_IT2STR(it));
 447
 448         if (d_mountpoint(dentry))
 449                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 450
 451         ll_frob_intent(&it, &lookup_it);
 452
 453         /* As do_lookup is called before follow_mount, root dentry may be left
 454          * not valid, revalidate it here. */
 455         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 456             (it->it_op & (IT_OPEN | IT_CREAT))) {
 457                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it);
 458                 if (rc)
 459                         RETURN(ERR_PTR(rc));
 460         }
 461
 462         icbd.icbd_childp = &dentry;
 463         icbd.icbd_parent = parent;
 464
 465         if (it->it_op & IT_CREAT ||
 466             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 467                 opc = LUSTRE_OPC_CREATE;
 468         else
 469                 opc = LUSTRE_OPC_ANY;
 470
 471         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 472                                      dentry->d_name.len, lookup_flags, opc);
 473         if (IS_ERR(op_data))
 474                 RETURN((void *)op_data);
 475
 476         it->it_create_mode &= ~current->fs->umask;
 477
 478         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 479                             lookup_flags, &req, ll_md_blocking_ast, 0);
 480         ll_finish_md_op_data(op_data);
 481         if (rc < 0)
 482                 GOTO(out, retval = ERR_PTR(rc));
 483
 484         rc = lookup_it_finish(req, DLM_REPLY_REC_OFF, it, &icbd);
 485         if (rc != 0) {
 486                 ll_intent_release(it);
 487                 GOTO(out, retval = ERR_PTR(rc));
 488         }
 489
 490         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 491             !S_ISREG(dentry->d_inode->i_mode) &&
 492             !S_ISDIR(dentry->d_inode->i_mode)) {
 493                 ll_release_openhandle(dentry, it);
 494         }
 495         ll_lookup_finish_locks(it, dentry);
 496
 497         if (dentry == save)
 498                 GOTO(out, retval = NULL);
 499         else
 500                 GOTO(out, retval = dentry);
 501  out:
 502         if (req)
 503                 ptlrpc_req_finished(req);
 504         return retval;
 505 }
 506
 507 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 508 #ifdef LUSTRE_KERNEL_VERSION
 509 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 510                                    struct nameidata *nd)
 511 {
 512         struct dentry *de;
 513         ENTRY;
 514
 515         if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
 516                 de = ll_lookup_it(parent, dentry, &nd->intent, nd->flags);
 517         else
 518                 de = ll_lookup_it(parent, dentry, NULL, 0);
 519
 520         RETURN(de);
 521 }
 522 #else
 523 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 524                                         int lookup_flags)
 525 {
 526         struct lookup_intent *it;
 527
 528         OBD_ALLOC(it, sizeof(*it));
 529         if (!it)
 530                 return ERR_PTR(-ENOMEM);
 531
 532         if (lookup_flags & LOOKUP_OPEN) {
 533                 it->it_op = IT_OPEN;
 534                 if (lookup_flags & LOOKUP_CREATE)
 535                         it->it_op |= IT_CREAT;
 536                 it->it_create_mode = oit->create_mode;
 537                 it->it_flags = oit->flags;
 538         } else {
 539                 it->it_op = IT_GETATTR;
 540         }
 541
 542 #ifndef HAVE_FILE_IN_STRUCT_INTENT
 543                 /* Since there is no way to pass our intent to ll_file_open,
 544                  * just check the file is there. Actual open will be done
 545                  * in ll_file_open */
 546                 if (it->it_op & IT_OPEN)
 547                         it->it_op = IT_LOOKUP;
 548 #endif
 549
 550         return it;
 551 }
 552
 553 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 554                                    struct nameidata *nd)
 555 {
 556         struct dentry *de;
 557         ENTRY;
 558
 559         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 560                 struct lookup_intent *it;
 561
 562 #if defined(HAVE_FILE_IN_STRUCT_INTENT) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 563                 /* Did we came here from failed revalidate just to propagate
 564                  * its error? */
 565                 if (nd->flags & LOOKUP_OPEN)
 566                         if (IS_ERR(nd->intent.open.file))
 567                                 RETURN((struct dentry *)nd->intent.open.file);
 568 #endif
 569
 570                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 571                         it = ll_d2d(dentry)->lld_it;
 572                         ll_d2d(dentry)->lld_it = NULL;
 573                 } else {
 574                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 575                         if (IS_ERR(it))
 576                                 RETURN((struct dentry *)it);
 577                 }
 578
 579                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 580                 if (de)
 581                         dentry = de;
 582                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 583                         if (dentry->d_inode &&
 584                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 585 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 586                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 587                                         // We cannot call open here as it would
 588                                         // deadlock.
 589                                         ptlrpc_req_finished(
 590                                                        (struct ptlrpc_request *)
 591                                                           it->d.lustre.it_data);
 592                                 } else {
 593                                         struct file *filp;
 594                                         nd->intent.open.file->private_data = it;
 595                                         filp =lookup_instantiate_filp(nd,dentry,
 596                                                                       NULL);
 597 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 598 /* 2.6.1[456] have a bug in open_namei() that forgets to check
 599  * nd->intent.open.file for error, so we need to return it as lookup's result
 600  * instead */
 601                                         if (IS_ERR(filp)) {
 602                                                 if (de)
 603                                                         dput(de);
 604                                                 de = (struct dentry *) filp;
 605                                         }
 606 #endif
 607
 608                                 }
 609 #else /* HAVE_FILE_IN_STRUCT_INTENT */
 610                                 /* Release open handle as we have no way to
 611                                  * pass it to ll_file_open */
 612                                 ll_release_openhandle(dentry, it);
 613 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
 614                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 615                                 // XXX This can only reliably work on assumption
 616                                 // that there are NO hashed negative dentries.
 617                                 ll_d2d(dentry)->lld_it = it;
 618                                 it = NULL; /* Will be freed in ll_create_nd */
 619                                 /* We absolutely depend on ll_create_nd to be
 620                                  * called to not leak this intent and possible
 621                                  * data attached to it */
 622                         }
 623                 }
 624
 625                 if (it) {
 626                         ll_intent_release(it);
 627                         OBD_FREE(it, sizeof(*it));
 628                 }
 629         } else {
 630                 de = ll_lookup_it(parent, dentry, NULL, 0);
 631         }
 632
 633         RETURN(de);
 634 }
 635 #endif
 636 #endif
 637
 638 /* We depend on "mode" being set with the proper file type/umask by now */
 639 static struct inode *ll_create_node(struct inode *dir, const char *name,
 640                                     int namelen, const void *data, int datalen,
 641                                     int mode, __u64 extra,
 642                                     struct lookup_intent *it)
 643 {
 644         struct inode *inode = NULL;
 645         struct ptlrpc_request *request = NULL;
 646         struct ll_sb_info *sbi = ll_i2sbi(dir);
 647         int rc;
 648         ENTRY;
 649
 650         LASSERT(it && it->d.lustre.it_disposition);
 651
 652         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 653         request = it->d.lustre.it_data;
 654         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 655         rc = ll_prep_inode(&inode, request, DLM_REPLY_REC_OFF, dir->i_sb);
 656         if (rc)
 657                 GOTO(out, inode = ERR_PTR(rc));
 658
 659         LASSERT(list_empty(&inode->i_dentry));
 660
 661         /* We asked for a lock on the directory, but were granted a
 662          * lock on the inode.  Since we finally have an inode pointer,
 663          * stuff it in the lock. */
 664         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 665                inode, inode->i_ino, inode->i_generation);
 666         md_set_lock_data(sbi->ll_md_exp,
 667                          &it->d.lustre.it_lock_handle, inode);
 668         EXIT;
 669  out:
 670         ptlrpc_req_finished(request);
 671         return inode;
 672 }
 673
 674 /*
 675  * By the time this is called, we already have created the directory cache
 676  * entry for the new file, but it is so far negative - it has no inode.
 677  *
 678  * We defer creating the OBD object(s) until open, to keep the intent and
 679  * non-intent code paths similar, and also because we do not have the MDS
 680  * inode number before calling ll_create_node() (which is needed for LOV),
 681  * so we would need to do yet another RPC to the MDS to store the LOV EA
 682  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 683  * lmm_size in datalen (the MDS still has code which will handle that).
 684  *
 685  * If the create succeeds, we fill in the inode information
 686  * with d_instantiate().
 687  */
 688 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 689                         struct lookup_intent *it)
 690 {
 691         struct inode *inode;
 692         int rc = 0;
 693         ENTRY;
 694
 695         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 696                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 697                dir->i_generation, dir, LL_IT2STR(it));
 698
 699         rc = it_open_error(DISP_OPEN_CREATE, it);
 700         if (rc)
 701                 RETURN(rc);
 702
 703         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 704                                NULL, 0, mode, 0, it);
 705         if (IS_ERR(inode)) {
 706                 RETURN(PTR_ERR(inode));
 707         }
 708
 709         d_instantiate(dentry, inode);
 710         /* Negative dentry may be unhashed if parent does not have UPDATE lock,
 711          * but some callers, e.g. do_coredump, expect dentry to be hashed after
 712          * successful create. Hash it here. */
 713         spin_lock(&dcache_lock);
 714         if (d_unhashed(dentry))
 715                 __d_rehash(dentry, 0);
 716         spin_unlock(&dcache_lock);
 717         RETURN(0);
 718 }
 719
 720 static void ll_update_times(struct ptlrpc_request *request, int offset,
 721                             struct inode *inode)
 722 {
 723         struct mdt_body *body = lustre_msg_buf(request->rq_repmsg, offset,
 724                                                sizeof(*body));
 725         LASSERT(body);
 726
 727         /* mtime is always updated with ctime, but can be set in past.
 728            As write and utime(2) may happen within 1 second, and utime's
 729            mtime has a priority over write's one, so take mtime from mds
 730            for the same ctimes. */
 731         if (body->valid & OBD_MD_FLCTIME &&
 732             body->ctime >= LTIME_S(inode->i_ctime)) {
 733                 LTIME_S(inode->i_ctime) = body->ctime;
 734
 735                 if (body->valid & OBD_MD_FLMTIME) {
 736                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
 737                                "to "LPU64"\n", inode->i_ino,
 738                                LTIME_S(inode->i_mtime), body->mtime);
 739                         LTIME_S(inode->i_mtime) = body->mtime;
 740                 }
 741         }
 742 }
 743
 744 static int ll_new_node(struct inode *dir, struct qstr *name,
 745                        const char *tgt, int mode, int rdev,
 746                        struct dentry *dchild, __u32 opc)
 747 {
 748         struct ptlrpc_request *request = NULL;
 749         struct md_op_data *op_data;
 750         struct inode *inode = NULL;
 751         struct ll_sb_info *sbi = ll_i2sbi(dir);
 752         int tgt_len = 0;
 753         int err;
 754
 755         ENTRY;
 756         if (unlikely(tgt != NULL))
 757                 tgt_len = strlen(tgt) + 1;
 758
 759         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 760                                      name->len, 0, opc);
 761         if (IS_ERR(op_data))
 762                 GOTO(err_exit, err = PTR_ERR(op_data));
 763
 764         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 765                         current->fsuid, current->fsgid,
 766                         current->cap_effective, rdev, &request);
 767         ll_finish_md_op_data(op_data);
 768         if (err)
 769                 GOTO(err_exit, err);
 770
 771         ll_update_times(request, REPLY_REC_OFF, dir);
 772
 773         if (dchild) {
 774                 err = ll_prep_inode(&inode, request, REPLY_REC_OFF,
 775                                     dchild->d_sb);
 776                 if (err)
 777                      GOTO(err_exit, err);
 778
 779                 d_drop(dchild);
 780                 d_instantiate(dchild, inode);
 781                 EXIT;
 782         }
 783 err_exit:
 784         ptlrpc_req_finished(request);
 785
 786         return err;
 787 }
 788
 789 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 790                             unsigned rdev, struct dentry *dchild)
 791 {
 792         int err;
 793         ENTRY;
 794
 795         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 796                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 797                mode, rdev);
 798
 799         mode &= ~current->fs->umask;
 800
 801         switch (mode & S_IFMT) {
 802         case 0:
 803                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 804         case S_IFREG:
 805         case S_IFCHR:
 806         case S_IFBLK:
 807         case S_IFIFO:
 808         case S_IFSOCK:
 809                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 810                                   LUSTRE_OPC_MKNOD);
 811                 break;
 812         case S_IFDIR:
 813                 err = -EPERM;
 814                 break;
 815         default:
 816                 err = -EINVAL;
 817         }
 818         RETURN(err);
 819 }
 820
 821 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 822 #ifndef LUSTRE_KERNEL_VERSION
 823 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 824                         int mode, struct nameidata *nd)
 825 {
 826         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 827         int rc;
 828
 829         if (!it)
 830                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 831
 832         ll_d2d(dentry)->lld_it = NULL;
 833
 834         /* Was there an error? Propagate it! */
 835         if (it->d.lustre.it_status) {
 836                 rc = it->d.lustre.it_status;
 837                 goto out;
 838         }
 839
 840         rc = ll_create_it(dir, dentry, mode, it);
 841 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 842         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 843                 nd->intent.open.file->private_data = it;
 844                 lookup_instantiate_filp(nd, dentry, NULL);
 845         }
 846 #else
 847         ll_release_openhandle(dentry,it);
 848 #endif
 849
 850 out:
 851         ll_intent_release(it);
 852         OBD_FREE(it, sizeof(*it));
 853
 854         return rc;
 855 }
 856 #else
 857 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 858                         int mode, struct nameidata *nd)
 859 {
 860         if (!nd || !nd->intent.d.lustre.it_disposition)
 861                 /* No saved request? Just mknod the file */
 862                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 863
 864         return ll_create_it(dir, dentry, mode, &nd->intent);
 865 }
 866 #endif
 867 #endif
 868
 869 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 870                               const char *tgt, struct dentry *dchild)
 871 {
 872         int err;
 873         ENTRY;
 874
 875         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 876                name->len, name->name, dir->i_ino, dir->i_generation,
 877                dir, 3000, tgt);
 878
 879         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 880                           0, dchild, LUSTRE_OPC_SYMLINK);
 881         RETURN(err);
 882 }
 883
 884 static int ll_link_generic(struct inode *src,  struct inode *dir,
 885                            struct qstr *name, struct dentry *dchild)
 886 {
 887         struct ll_sb_info *sbi = ll_i2sbi(dir);
 888         struct ptlrpc_request *request = NULL;
 889         struct md_op_data *op_data;
 890         int err;
 891
 892         ENTRY;
 893         CDEBUG(D_VFSTRACE,
 894                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
 895                src->i_ino, src->i_generation, src, dir->i_ino,
 896                dir->i_generation, dir, name->len, name->name);
 897
 898         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
 899                                      0, LUSTRE_OPC_ANY);
 900         if (IS_ERR(op_data))
 901                 RETURN(PTR_ERR(op_data));
 902
 903         err = md_link(sbi->ll_md_exp, op_data, &request);
 904         ll_finish_md_op_data(op_data);
 905         if (err)
 906                 GOTO(out, err);
 907         if (dchild)
 908                 d_drop(dchild);
 909
 910         ll_update_times(request, REPLY_REC_OFF, dir);
 911         EXIT;
 912 out:
 913         ptlrpc_req_finished(request);
 914         RETURN(err);
 915 }
 916
 917 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
 918                             int mode, struct dentry *dchild)
 919
 920 {
 921         int err;
 922         ENTRY;
 923
 924         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 925                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 926
 927         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
 928         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
 929
 930         RETURN(err);
 931 }
 932
 933 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
 934                             struct dentry *dchild, struct qstr *name)
 935 {
 936         struct ptlrpc_request *request = NULL;
 937         struct md_op_data *op_data;
 938         int rc;
 939         ENTRY;
 940
 941         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 942                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 943
 944         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
 945                 RETURN(-EBUSY);
 946
 947         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
 948                                      S_IFDIR, LUSTRE_OPC_ANY);
 949         if (IS_ERR(op_data))
 950                 RETURN(PTR_ERR(op_data));
 951
 952         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
 953         ll_finish_md_op_data(op_data);
 954         if (rc == 0)
 955                 ll_update_times(request, REPLY_REC_OFF, dir);
 956         ptlrpc_req_finished(request);
 957         RETURN(rc);
 958 }
 959
 960 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
 961 {
 962         struct mdt_body *body;
 963         struct lov_mds_md *eadata;
 964         struct lov_stripe_md *lsm = NULL;
 965         struct obd_trans_info oti = { 0 };
 966         struct obdo *oa;
 967         int rc;
 968         ENTRY;
 969
 970         /* req is swabbed so this is safe */
 971         body = lustre_msg_buf(request->rq_repmsg, REPLY_REC_OFF, sizeof(*body));
 972
 973         if (!(body->valid & OBD_MD_FLEASIZE))
 974                 RETURN(0);
 975
 976         if (body->eadatasize == 0) {
 977                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
 978                 GOTO(out, rc = -EPROTO);
 979         }
 980
 981         /* The MDS sent back the EA because we unlinked the last reference
 982          * to this file. Use this EA to unlink the objects on the OST.
 983          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
 984          * check it is complete and sensible. */
 985         eadata = lustre_swab_repbuf(request, REPLY_REC_OFF + 1,
 986                                     body->eadatasize, NULL);
 987         LASSERT(eadata != NULL);
 988         if (eadata == NULL) {
 989                 CERROR("Can't unpack MDS EA data\n");
 990                 GOTO(out, rc = -EPROTO);
 991         }
 992
 993         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
 994         if (rc < 0) {
 995                 CERROR("obd_unpackmd: %d\n", rc);
 996                 GOTO(out, rc);
 997         }
 998         LASSERT(rc >= sizeof(*lsm));
 999
1000         rc = obd_checkmd(ll_i2dtexp(dir), ll_i2mdexp(dir), lsm);
1001         if (rc)
1002                 GOTO(out_free_memmd, rc);
1003
1004         OBDO_ALLOC(oa);
1005         if (oa == NULL)
1006                 GOTO(out_free_memmd, rc = -ENOMEM);
1007
1008         oa->o_id = lsm->lsm_object_id;
1009         oa->o_gr = lsm->lsm_object_gr;
1010         oa->o_mode = body->mode & S_IFMT;
1011         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1012
1013         if (body->valid & OBD_MD_FLCOOKIE) {
1014                 oa->o_valid |= OBD_MD_FLCOOKIE;
1015                 oti.oti_logcookies =
1016                         lustre_msg_buf(request->rq_repmsg, REPLY_REC_OFF + 2,
1017                                        sizeof(struct llog_cookie) *
1018                                        lsm->lsm_stripe_count);
1019                 if (oti.oti_logcookies == NULL) {
1020                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1021                         body->valid &= ~OBD_MD_FLCOOKIE;
1022                 }
1023         }
1024
1025         rc = obd_destroy(ll_i2dtexp(dir), oa, lsm, &oti, ll_i2mdexp(dir));
1026         OBDO_FREE(oa);
1027         if (rc)
1028                 CERROR("obd destroy objid "LPX64" error %d\n",
1029                        lsm->lsm_object_id, rc);
1030  out_free_memmd:
1031         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1032  out:
1033         return rc;
1034 }
1035
1036 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1037                              struct dentry *dchild, struct qstr *name)
1038 {
1039         struct ptlrpc_request *request = NULL;
1040         struct md_op_data *op_data;
1041         int rc;
1042         ENTRY;
1043         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1044                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1045
1046         /*
1047          * XXX: unlink bind mountpoint maybe call to here,
1048          * just check it as vfs_unlink does.
1049          */
1050         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1051                 RETURN(-EBUSY);
1052
1053         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1054                                      name->len, 0, LUSTRE_OPC_ANY);
1055         if (IS_ERR(op_data))
1056                 RETURN(PTR_ERR(op_data));
1057
1058         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1059         ll_finish_md_op_data(op_data);
1060
1061         if (rc)
1062                 GOTO(out, rc);
1063
1064         ll_update_times(request, REPLY_REC_OFF, dir);
1065
1066         rc = ll_objects_destroy(request, dir);
1067  out:
1068         ptlrpc_req_finished(request);
1069         RETURN(rc);
1070 }
1071
1072 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1073                              struct dentry *src_dchild, struct qstr *src_name,
1074                              struct inode *tgt, struct dentry *tgt_dparent,
1075                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1076 {
1077         struct ptlrpc_request *request = NULL;
1078         struct ll_sb_info *sbi = ll_i2sbi(src);
1079         struct md_op_data *op_data;
1080         int err;
1081         ENTRY;
1082         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1083                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1084                src->i_ino, src->i_generation, src, tgt_name->len,
1085                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1086
1087         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1088             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1089                 RETURN(-EBUSY);
1090
1091         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1092                                      LUSTRE_OPC_ANY);
1093         if (IS_ERR(op_data))
1094                 RETURN(PTR_ERR(op_data));
1095
1096         err = md_rename(sbi->ll_md_exp, op_data,
1097                         src_name->name, src_name->len,
1098                         tgt_name->name, tgt_name->len, &request);
1099         ll_finish_md_op_data(op_data);
1100         if (!err) {
1101                 ll_update_times(request, REPLY_REC_OFF, src);
1102                 ll_update_times(request, REPLY_REC_OFF, tgt);
1103                 err = ll_objects_destroy(request, src);
1104         }
1105
1106         ptlrpc_req_finished(request);
1107
1108         RETURN(err);
1109 }
1110
1111 #ifdef LUSTRE_KERNEL_VERSION
1112 static int ll_mknod_raw(struct nameidata *nd, int mode, dev_t rdev)
1113 {
1114         return ll_mknod_generic(nd->dentry->d_inode, &nd->last, mode,rdev,NULL);
1115 }
1116 static int ll_rename_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1117 {
1118         return ll_rename_generic(srcnd->dentry->d_inode, srcnd->dentry,
1119                                  NULL, &srcnd->last,
1120                                  tgtnd->dentry->d_inode, tgtnd->dentry,
1121                                  NULL, &tgtnd->last);
1122 }
1123 static int ll_link_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1124 {
1125         return ll_link_generic(srcnd->dentry->d_inode, tgtnd->dentry->d_inode,
1126                                &tgtnd->last, NULL);
1127 }
1128 static int ll_symlink_raw(struct nameidata *nd, const char *tgt)
1129 {
1130         return ll_symlink_generic(nd->dentry->d_inode, &nd->last, tgt, NULL);
1131 }
1132 static int ll_rmdir_raw(struct nameidata *nd)
1133 {
1134         return ll_rmdir_generic(nd->dentry->d_inode, nd->dentry, NULL,
1135                                 &nd->last);
1136 }
1137 static int ll_mkdir_raw(struct nameidata *nd, int mode)
1138 {
1139         return ll_mkdir_generic(nd->dentry->d_inode, &nd->last, mode, NULL);
1140 }
1141 static int ll_unlink_raw(struct nameidata *nd)
1142 {
1143         return ll_unlink_generic(nd->dentry->d_inode, nd->dentry, NULL,
1144                                  &nd->last);
1145 }
1146 #endif
1147
1148 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1149                     ll_dev_t rdev)
1150 {
1151         return ll_mknod_generic(dir, &dchild->d_name, mode,
1152                                 old_encode_dev(rdev), dchild);
1153 }
1154
1155 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1156 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1157 {
1158         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1159 }
1160 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1161 {
1162         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1163 }
1164 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1165 {
1166         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1167 }
1168 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1169                       const char *oldname)
1170 {
1171         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1172 }
1173 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1174                    struct dentry *new_dentry)
1175 {
1176         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1177                                new_dentry);
1178 }
1179 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1180                      struct inode *new_dir, struct dentry *new_dentry)
1181 {
1182         return ll_rename_generic(old_dir, NULL,
1183                                  old_dentry, &old_dentry->d_name,
1184                                  new_dir, NULL, new_dentry,
1185                                  &new_dentry->d_name);
1186 }
1187 #endif
1188
1189 struct inode_operations ll_dir_inode_operations = {
1190 #ifdef LUSTRE_KERNEL_VERSION
1191         .link_raw           = ll_link_raw,
1192         .unlink_raw         = ll_unlink_raw,
1193         .symlink_raw        = ll_symlink_raw,
1194         .mkdir_raw          = ll_mkdir_raw,
1195         .rmdir_raw          = ll_rmdir_raw,
1196         .mknod_raw          = ll_mknod_raw,
1197         .rename_raw         = ll_rename_raw,
1198         .setattr            = ll_setattr,
1199         .setattr_raw        = ll_setattr_raw,
1200 #endif
1201         .mknod              = ll_mknod,
1202 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
1203         .create_it          = ll_create_it,
1204         .lookup_it          = ll_lookup_it,
1205         .revalidate_it      = ll_inode_revalidate_it,
1206 #else
1207         .lookup             = ll_lookup_nd,
1208         .create             = ll_create_nd,
1209         /* We need all these non-raw things for NFSD, to not patch it. */
1210         .unlink             = ll_unlink,
1211         .mkdir              = ll_mkdir,
1212         .rmdir              = ll_rmdir,
1213         .symlink            = ll_symlink,
1214         .link               = ll_link,
1215         .rename             = ll_rename,
1216         .setattr            = ll_setattr,
1217         .getattr            = ll_getattr,
1218 #endif
1219         .permission         = ll_inode_permission,
1220         .setxattr           = ll_setxattr,
1221         .getxattr           = ll_getxattr,
1222         .listxattr          = ll_listxattr,
1223         .removexattr        = ll_removexattr,
1224 };
1225
1226 struct inode_operations ll_special_inode_operations = {
1227 #ifdef LUSTRE_KERNEL_VERSION
1228         .setattr_raw    = ll_setattr_raw,
1229 #endif
1230         .setattr        = ll_setattr,
1231 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1232         .getattr        = ll_getattr,
1233 #else
1234         .revalidate_it  = ll_inode_revalidate_it,
1235 #endif
1236         .permission     = ll_inode_permission,
1237         .setxattr       = ll_setxattr,
1238         .getxattr       = ll_getxattr,
1239         .listxattr      = ll_listxattr,
1240         .removexattr    = ll_removexattr,
1241 };