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 struct inode *ll_iget(struct super_block *sb, ino_t hash,
  78                       struct lustre_md *md)
  79 {
  80         struct ll_inode_info *lli;
  81         struct inode *inode;
  82         LASSERT(hash != 0);
  83
  84         inode = iget_locked(sb, hash);
  85         if (inode) {
  86                 if (inode->i_state & I_NEW) {
  87                         lli = ll_i2info(inode);
  88                         ll_read_inode2(inode, md);
  89                         unlock_new_inode(inode);
  90                 } else {
  91                         if (!(inode->i_state & (I_FREEING | I_CLEAR)))
  92                                 ll_update_inode(inode, md);
  93                 }
  94                 CDEBUG(D_VFSTRACE, "inode: %lu/%u(%p)\n",
  95                        inode->i_ino, inode->i_generation, inode);
  96         }
  97
  98         return inode;
  99 }
 100
 101 static void ll_drop_negative_dentry(struct inode *dir)
 102 {
 103         struct dentry *dentry, *tmp_alias, *tmp_subdir;
 104
 105         spin_lock(&dcache_lock);
 106 restart:
 107         list_for_each_entry_safe(dentry, tmp_alias,
 108                                  &dir->i_dentry,d_alias) {
 109                 if (!list_empty(&dentry->d_subdirs)) {
 110                         struct dentry *child;
 111                         list_for_each_entry_safe(child, tmp_subdir,
 112                                                  &dentry->d_subdirs,
 113                                                  d_child) {
 114                                 /* XXX Print some debug here? */
 115                                 if (!child->d_inode)
 116                                 /* Negative dentry. If we were
 117                                    dropping dcache lock, go
 118                                    throught the list again */
 119                                         if (ll_drop_dentry(child))
 120                                                 goto restart;
 121                         }
 122                 }
 123         }
 124         spin_unlock(&dcache_lock);
 125 }
 126
 127
 128 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 129                        void *data, int flag)
 130 {
 131         int rc;
 132         struct lustre_handle lockh;
 133         ENTRY;
 134
 135         switch (flag) {
 136         case LDLM_CB_BLOCKING:
 137                 ldlm_lock2handle(lock, &lockh);
 138                 rc = ldlm_cli_cancel(&lockh);
 139                 if (rc < 0) {
 140                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 141                         RETURN(rc);
 142                 }
 143                 break;
 144         case LDLM_CB_CANCELING: {
 145                 struct inode *inode = ll_inode_from_lock(lock);
 146                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 147                 struct lu_fid *fid;
 148
 149                 /* Invalidate all dentries associated with this inode */
 150                 if (inode == NULL)
 151                         break;
 152
 153                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
 154                 if ((bits & MDS_INODELOCK_LOOKUP) &&
 155                     ll_have_md_lock(inode, MDS_INODELOCK_LOOKUP))
 156                         bits &= ~MDS_INODELOCK_LOOKUP;
 157                 if ((bits & MDS_INODELOCK_UPDATE) &&
 158                     ll_have_md_lock(inode, MDS_INODELOCK_UPDATE))
 159                         bits &= ~MDS_INODELOCK_UPDATE;
 160                 if ((bits & MDS_INODELOCK_OPEN) &&
 161                     ll_have_md_lock(inode, MDS_INODELOCK_OPEN))
 162                         bits &= ~MDS_INODELOCK_OPEN;
 163
 164                 fid = ll_inode2fid(inode);
 165                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
 166                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
 167                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
 168                         LDLM_ERROR(lock, "data mismatch with object "
 169                                    DFID" (%p)", PFID(fid), inode);
 170                 }
 171
 172                 if (bits & MDS_INODELOCK_OPEN) {
 173                         int flags = 0;
 174                         switch (lock->l_req_mode) {
 175                         case LCK_CW:
 176                                 flags = FMODE_WRITE;
 177                                 break;
 178                         case LCK_PR:
 179                                 flags = FMODE_EXEC;
 180                                 break;
 181                         case LCK_CR:
 182                                 flags = FMODE_READ;
 183                                 break;
 184                         default:
 185                                 CERROR("Unexpected lock mode for OPEN lock "
 186                                        "%d, inode %ld\n", lock->l_req_mode,
 187                                        inode->i_ino);
 188                         }
 189                         ll_md_real_close(inode, flags);
 190                 }
 191
 192                 if (bits & MDS_INODELOCK_UPDATE)
 193                         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 194
 195                 if (S_ISDIR(inode->i_mode) &&
 196                      (bits & MDS_INODELOCK_UPDATE)) {
 197                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 198                                inode->i_ino);
 199                         truncate_inode_pages(inode->i_mapping, 0);
 200                         ll_drop_negative_dentry(inode);
 201                 }
 202
 203                 if (inode->i_sb->s_root &&
 204                     inode != inode->i_sb->s_root->d_inode &&
 205                     (bits & MDS_INODELOCK_LOOKUP))
 206                         ll_unhash_aliases(inode);
 207                 iput(inode);
 208                 break;
 209         }
 210         default:
 211                 LBUG();
 212         }
 213
 214         RETURN(0);
 215 }
 216
 217 /* Pack the required supplementary groups into the supplied groups array.
 218  * If we don't need to use the groups from the target inode(s) then we
 219  * instead pack one or more groups from the user's supplementary group
 220  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 221 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 222 {
 223         int i;
 224
 225         LASSERT(i1 != NULL);
 226         LASSERT(suppgids != NULL);
 227
 228         if (in_group_p(i1->i_gid))
 229                 suppgids[0] = i1->i_gid;
 230         else
 231                 suppgids[0] = -1;
 232
 233         if (i2) {
 234                 if (in_group_p(i2->i_gid))
 235                         suppgids[1] = i2->i_gid;
 236                 else
 237                         suppgids[1] = -1;
 238         } else {
 239                 suppgids[1] = -1;
 240         }
 241
 242         for (i = 0; i < current_ngroups; i++) {
 243                 if (suppgids[0] == -1) {
 244                         if (current_groups[i] != suppgids[1])
 245                                 suppgids[0] = current_groups[i];
 246                         continue;
 247                 }
 248                 if (suppgids[1] == -1) {
 249                         if (current_groups[i] != suppgids[0])
 250                                 suppgids[1] = current_groups[i];
 251                         continue;
 252                 }
 253                 break;
 254         }
 255 }
 256
 257 static void ll_d_add(struct dentry *de, struct inode *inode)
 258 {
 259         CDEBUG(D_DENTRY, "adding inode %p to dentry %p\n", inode, de);
 260         /* d_instantiate */
 261         if (!list_empty(&de->d_alias)) {
 262                 spin_unlock(&dcache_lock);
 263                 CERROR("dentry %.*s %p alias next %p, prev %p\n",
 264                        de->d_name.len, de->d_name.name, de,
 265                        de->d_alias.next, de->d_alias.prev);
 266                 LBUG();
 267         }
 268         if (inode)
 269                 list_add(&de->d_alias, &inode->i_dentry);
 270         de->d_inode = inode;
 271
 272         /* d_rehash */
 273         if (!d_unhashed(de)) {
 274                 spin_unlock(&dcache_lock);
 275                 CERROR("dentry %.*s %p hash next %p\n",
 276                        de->d_name.len, de->d_name.name, de, de->d_hash.next);
 277                 LBUG();
 278         }
 279         __d_rehash(de, 0);
 280 }
 281
 282 /* Search "inode"'s alias list for a dentry that has the same name and parent
 283  * as de.  If found, return it.  If not found, return de.
 284  * Lustre can't use d_add_unique because don't unhash aliases for directory
 285  * in ll_revalidate_it.  After revaliadate inode will be have hashed aliases
 286  * and it triggers BUG_ON in d_instantiate_unique (bug #10954).
 287  */
 288 struct dentry *ll_find_alias(struct inode *inode, struct dentry *de)
 289 {
 290         struct list_head *tmp;
 291         struct dentry *dentry;
 292         struct dentry *last_discon = NULL;
 293
 294         spin_lock(&dcache_lock);
 295         list_for_each(tmp, &inode->i_dentry) {
 296                 dentry = list_entry(tmp, struct dentry, d_alias);
 297
 298                 /* We are called here with 'de' already on the aliases list. */
 299                 if (unlikely(dentry == de)) {
 300                         CERROR("whoops\n");
 301                         continue;
 302                 }
 303
 304                 if (dentry->d_flags & DCACHE_DISCONNECTED) {
 305                         LASSERT(last_discon == NULL);
 306                         last_discon = dentry;
 307                         continue;
 308                 }
 309
 310                 if (dentry->d_parent != de->d_parent)
 311                         continue;
 312
 313                 if (dentry->d_name.hash != de->d_name.hash)
 314                         continue;
 315
 316                 if (dentry->d_name.len != de->d_name.len)
 317                         continue;
 318
 319                 if (memcmp(dentry->d_name.name, de->d_name.name,
 320                            de->d_name.len) != 0)
 321                         continue;
 322
 323                 dget_locked(dentry);
 324                 lock_dentry(dentry);
 325                 __d_drop(dentry);
 326 #ifdef LUSTRE_KERNEL_VERSION
 327                 dentry->d_flags &= ~DCACHE_LUSTRE_INVALID;
 328 #endif
 329                 unlock_dentry(dentry);
 330                 __d_rehash(dentry, 0); /* avoid taking dcache_lock inside */
 331                 spin_unlock(&dcache_lock);
 332                 iput(inode);
 333                 CDEBUG(D_DENTRY, "alias dentry %.*s (%p) parent %p inode %p "
 334                        "refc %d\n", de->d_name.len, de->d_name.name, de,
 335                        de->d_parent, de->d_inode, atomic_read(&de->d_count));
 336                 return dentry;
 337         }
 338
 339         if (last_discon) {
 340                 CDEBUG(D_DENTRY, "Reuse disconnected dentry %p inode %p "
 341                         "refc %d\n", last_discon, last_discon->d_inode,
 342                         atomic_read(&last_discon->d_count));
 343                 __d_rehash(de, 0);
 344                 dget_locked(last_discon);
 345                 __d_move(last_discon, de);
 346                 spin_unlock(&dcache_lock);
 347                 d_rehash(de);
 348                 iput(inode);
 349                 return last_discon;
 350         }
 351
 352         ll_d_add(de, inode);
 353
 354         spin_unlock(&dcache_lock);
 355
 356         return de;
 357 }
 358
 359 static int lookup_it_finish(struct ptlrpc_request *request, int offset,
 360                             struct lookup_intent *it, void *data)
 361 {
 362         struct it_cb_data *icbd = data;
 363         struct dentry **de = icbd->icbd_childp;
 364         struct inode *parent = icbd->icbd_parent;
 365         struct ll_sb_info *sbi = ll_i2sbi(parent);
 366         struct inode *inode = NULL;
 367         int rc;
 368
 369         /* NB 1 request reference will be taken away by ll_intent_lock()
 370          * when I return */
 371         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 372                 ENTRY;
 373
 374                 rc = ll_prep_inode(&inode, request, offset,
 375                                    (*de)->d_sb);
 376                 if (rc)
 377                         RETURN(rc);
 378
 379                 CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
 380                        inode, inode->i_ino, inode->i_generation);
 381                 md_set_lock_data(sbi->ll_md_exp,
 382                                  &it->d.lustre.it_lock_handle, inode);
 383
 384                 /* We used to query real size from OSTs here, but actually
 385                    this is not needed. For stat() calls size would be updated
 386                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 387                    2.4 and
 388                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 389                    Everybody else who needs correct file size would call
 390                    ll_glimpse_size or some equivalent themselves anyway.
 391                    Also see bug 7198. */
 392
 393                 *de = ll_find_alias(inode, *de);
 394         } else {
 395                 ENTRY;
 396                 /* Check that parent has UPDATE lock. If there is none, we
 397                    cannot afford to hash this dentry (done by ll_d_add) as it
 398                    might get picked up later when UPDATE lock will appear */
 399                 if (ll_have_md_lock(parent, MDS_INODELOCK_UPDATE)) {
 400                         spin_lock(&dcache_lock);
 401                         ll_d_add(*de, inode);
 402                         spin_unlock(&dcache_lock);
 403                 } else {
 404                         (*de)->d_inode = NULL;
 405                         /* We do not want to hash the dentry if don`t have a
 406                          * lock, but if this dentry is later used in d_move,
 407                          * we'd hit uninitialised list head d_hash, so we just
 408                          * do this to init d_hash field but leave dentry
 409                          * unhashed. (bug 10796). */
 410                         d_rehash(*de);
 411                         d_drop(*de);
 412                 }
 413         }
 414
 415         ll_set_dd(*de);
 416         (*de)->d_op = &ll_d_ops;
 417
 418         RETURN(0);
 419 }
 420
 421 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 422                                    struct lookup_intent *it, int lookup_flags)
 423 {
 424         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 425         struct dentry *save = dentry, *retval;
 426         struct ptlrpc_request *req = NULL;
 427         struct md_op_data *op_data;
 428         struct it_cb_data icbd;
 429         __u32 opc;
 430         int rc;
 431         ENTRY;
 432
 433         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 434                 RETURN(ERR_PTR(-ENAMETOOLONG));
 435
 436         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 437                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 438                parent->i_generation, parent, LL_IT2STR(it));
 439
 440         if (d_mountpoint(dentry))
 441                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 442
 443         ll_frob_intent(&it, &lookup_it);
 444
 445         /* As do_lookup is called before follow_mount, root dentry may be left
 446          * not valid, revalidate it here. */
 447         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 448             (it->it_op & (IT_OPEN | IT_CREAT))) {
 449                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it);
 450                 if (rc)
 451                         RETURN(ERR_PTR(rc));
 452         }
 453
 454         icbd.icbd_childp = &dentry;
 455         icbd.icbd_parent = parent;
 456
 457         if (it->it_op & IT_CREAT ||
 458             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 459                 opc = LUSTRE_OPC_CREATE;
 460         else
 461                 opc = LUSTRE_OPC_ANY;
 462
 463         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 464                                      dentry->d_name.len, lookup_flags, opc,
 465                                      NULL);
 466         if (IS_ERR(op_data))
 467                 RETURN((void *)op_data);
 468
 469         it->it_create_mode &= ~current->fs->umask;
 470
 471         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 472                             lookup_flags, &req, ll_md_blocking_ast, 0);
 473         ll_finish_md_op_data(op_data);
 474         if (rc < 0)
 475                 GOTO(out, retval = ERR_PTR(rc));
 476
 477         rc = lookup_it_finish(req, DLM_REPLY_REC_OFF, it, &icbd);
 478         if (rc != 0) {
 479                 ll_intent_release(it);
 480                 GOTO(out, retval = ERR_PTR(rc));
 481         }
 482
 483         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 484             !S_ISREG(dentry->d_inode->i_mode) &&
 485             !S_ISDIR(dentry->d_inode->i_mode)) {
 486                 ll_release_openhandle(dentry, it);
 487         }
 488         ll_lookup_finish_locks(it, dentry);
 489
 490         if (dentry == save)
 491                 GOTO(out, retval = NULL);
 492         else
 493                 GOTO(out, retval = dentry);
 494  out:
 495         if (req)
 496                 ptlrpc_req_finished(req);
 497         return retval;
 498 }
 499
 500 #ifdef LUSTRE_KERNEL_VERSION
 501 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 502                                    struct nameidata *nd)
 503 {
 504         struct dentry *de;
 505         ENTRY;
 506
 507         if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
 508                 de = ll_lookup_it(parent, dentry, &nd->intent, nd->flags);
 509         else
 510                 de = ll_lookup_it(parent, dentry, NULL, 0);
 511
 512         RETURN(de);
 513 }
 514 #else
 515 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 516                                         int lookup_flags)
 517 {
 518         struct lookup_intent *it;
 519
 520         OBD_ALLOC(it, sizeof(*it));
 521         if (!it)
 522                 return ERR_PTR(-ENOMEM);
 523
 524         if (lookup_flags & LOOKUP_OPEN) {
 525                 it->it_op = IT_OPEN;
 526                 if (lookup_flags & LOOKUP_CREATE)
 527                         it->it_op |= IT_CREAT;
 528                 it->it_create_mode = oit->create_mode;
 529                 it->it_flags = oit->flags;
 530         } else {
 531                 it->it_op = IT_GETATTR;
 532         }
 533
 534 #ifndef HAVE_FILE_IN_STRUCT_INTENT
 535                 /* Since there is no way to pass our intent to ll_file_open,
 536                  * just check the file is there. Actual open will be done
 537                  * in ll_file_open */
 538                 if (it->it_op & IT_OPEN)
 539                         it->it_op = IT_LOOKUP;
 540 #endif
 541
 542         return it;
 543 }
 544
 545 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 546                                    struct nameidata *nd)
 547 {
 548         struct dentry *de;
 549         ENTRY;
 550
 551         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 552                 struct lookup_intent *it;
 553
 554 #if defined(HAVE_FILE_IN_STRUCT_INTENT) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 555                 /* Did we came here from failed revalidate just to propagate
 556                  * its error? */
 557                 if (nd->flags & LOOKUP_OPEN)
 558                         if (IS_ERR(nd->intent.open.file))
 559                                 RETURN((struct dentry *)nd->intent.open.file);
 560 #endif
 561
 562                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 563                         it = ll_d2d(dentry)->lld_it;
 564                         ll_d2d(dentry)->lld_it = NULL;
 565                 } else {
 566                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 567                         if (IS_ERR(it))
 568                                 RETURN((struct dentry *)it);
 569                 }
 570
 571                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 572                 if (de)
 573                         dentry = de;
 574                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 575                         if (dentry->d_inode &&
 576                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 577 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 578                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 579                                         // We cannot call open here as it would
 580                                         // deadlock.
 581                                         ptlrpc_req_finished(
 582                                                        (struct ptlrpc_request *)
 583                                                           it->d.lustre.it_data);
 584                                 } else {
 585                                         struct file *filp;
 586                                         nd->intent.open.file->private_data = it;
 587                                         filp =lookup_instantiate_filp(nd,dentry,
 588                                                                       NULL);
 589 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 590 /* 2.6.1[456] have a bug in open_namei() that forgets to check
 591  * nd->intent.open.file for error, so we need to return it as lookup's result
 592  * instead */
 593                                         if (IS_ERR(filp)) {
 594                                                 if (de)
 595                                                         dput(de);
 596                                                 de = (struct dentry *) filp;
 597                                         }
 598 #endif
 599
 600                                 }
 601 #else /* HAVE_FILE_IN_STRUCT_INTENT */
 602                                 /* Release open handle as we have no way to
 603                                  * pass it to ll_file_open */
 604                                 ll_release_openhandle(dentry, it);
 605 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
 606                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 607                                 // XXX This can only reliably work on assumption
 608                                 // that there are NO hashed negative dentries.
 609                                 ll_d2d(dentry)->lld_it = it;
 610                                 it = NULL; /* Will be freed in ll_create_nd */
 611                                 /* We absolutely depend on ll_create_nd to be
 612                                  * called to not leak this intent and possible
 613                                  * data attached to it */
 614                         }
 615                 }
 616
 617                 if (it) {
 618                         ll_intent_release(it);
 619                         OBD_FREE(it, sizeof(*it));
 620                 }
 621         } else {
 622                 de = ll_lookup_it(parent, dentry, NULL, 0);
 623         }
 624
 625         RETURN(de);
 626 }
 627 #endif
 628
 629 /* We depend on "mode" being set with the proper file type/umask by now */
 630 static struct inode *ll_create_node(struct inode *dir, const char *name,
 631                                     int namelen, const void *data, int datalen,
 632                                     int mode, __u64 extra,
 633                                     struct lookup_intent *it)
 634 {
 635         struct inode *inode = NULL;
 636         struct ptlrpc_request *request = NULL;
 637         struct ll_sb_info *sbi = ll_i2sbi(dir);
 638         int rc;
 639         ENTRY;
 640
 641         LASSERT(it && it->d.lustre.it_disposition);
 642
 643         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 644         request = it->d.lustre.it_data;
 645         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 646         rc = ll_prep_inode(&inode, request, DLM_REPLY_REC_OFF, dir->i_sb);
 647         if (rc)
 648                 GOTO(out, inode = ERR_PTR(rc));
 649
 650         LASSERT(list_empty(&inode->i_dentry));
 651
 652         /* We asked for a lock on the directory, but were granted a
 653          * lock on the inode.  Since we finally have an inode pointer,
 654          * stuff it in the lock. */
 655         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 656                inode, inode->i_ino, inode->i_generation);
 657         md_set_lock_data(sbi->ll_md_exp,
 658                          &it->d.lustre.it_lock_handle, inode);
 659         EXIT;
 660  out:
 661         ptlrpc_req_finished(request);
 662         return inode;
 663 }
 664
 665 /*
 666  * By the time this is called, we already have created the directory cache
 667  * entry for the new file, but it is so far negative - it has no inode.
 668  *
 669  * We defer creating the OBD object(s) until open, to keep the intent and
 670  * non-intent code paths similar, and also because we do not have the MDS
 671  * inode number before calling ll_create_node() (which is needed for LOV),
 672  * so we would need to do yet another RPC to the MDS to store the LOV EA
 673  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 674  * lmm_size in datalen (the MDS still has code which will handle that).
 675  *
 676  * If the create succeeds, we fill in the inode information
 677  * with d_instantiate().
 678  */
 679 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 680                         struct lookup_intent *it)
 681 {
 682         struct inode *inode;
 683         int rc = 0;
 684         ENTRY;
 685
 686         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 687                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 688                dir->i_generation, dir, LL_IT2STR(it));
 689
 690         rc = it_open_error(DISP_OPEN_CREATE, it);
 691         if (rc)
 692                 RETURN(rc);
 693
 694         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 695                                NULL, 0, mode, 0, it);
 696         if (IS_ERR(inode)) {
 697                 RETURN(PTR_ERR(inode));
 698         }
 699
 700         d_instantiate(dentry, inode);
 701         /* Negative dentry may be unhashed if parent does not have UPDATE lock,
 702          * but some callers, e.g. do_coredump, expect dentry to be hashed after
 703          * successful create. Hash it here. */
 704         spin_lock(&dcache_lock);
 705         if (d_unhashed(dentry))
 706                 __d_rehash(dentry, 0);
 707         spin_unlock(&dcache_lock);
 708         RETURN(0);
 709 }
 710
 711 static void ll_update_times(struct ptlrpc_request *request, int offset,
 712                             struct inode *inode)
 713 {
 714         struct mdt_body *body = lustre_msg_buf(request->rq_repmsg, offset,
 715                                                sizeof(*body));
 716         LASSERT(body);
 717
 718         /* mtime is always updated with ctime, but can be set in past.
 719            As write and utime(2) may happen within 1 second, and utime's
 720            mtime has a priority over write's one, so take mtime from mds
 721            for the same ctimes. */
 722         if (body->valid & OBD_MD_FLCTIME &&
 723             body->ctime >= LTIME_S(inode->i_ctime)) {
 724                 LTIME_S(inode->i_ctime) = body->ctime;
 725
 726                 if (body->valid & OBD_MD_FLMTIME) {
 727                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
 728                                "to "LPU64"\n", inode->i_ino,
 729                                LTIME_S(inode->i_mtime), body->mtime);
 730                         LTIME_S(inode->i_mtime) = body->mtime;
 731                 }
 732         }
 733 }
 734
 735 static int ll_new_node(struct inode *dir, struct qstr *name,
 736                        const char *tgt, int mode, int rdev,
 737                        struct dentry *dchild, __u32 opc)
 738 {
 739         struct ptlrpc_request *request = NULL;
 740         struct md_op_data *op_data;
 741         struct inode *inode = NULL;
 742         struct ll_sb_info *sbi = ll_i2sbi(dir);
 743         int tgt_len = 0;
 744         int err;
 745
 746         ENTRY;
 747         if (unlikely(tgt != NULL))
 748                 tgt_len = strlen(tgt) + 1;
 749
 750         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 751                                      name->len, 0, opc, NULL);
 752         if (IS_ERR(op_data))
 753                 GOTO(err_exit, err = PTR_ERR(op_data));
 754
 755         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 756                         current->fsuid, current->fsgid,
 757                         current->cap_effective, rdev, &request);
 758         ll_finish_md_op_data(op_data);
 759         if (err)
 760                 GOTO(err_exit, err);
 761
 762         ll_update_times(request, REPLY_REC_OFF, dir);
 763
 764         if (dchild) {
 765                 err = ll_prep_inode(&inode, request, REPLY_REC_OFF,
 766                                     dchild->d_sb);
 767                 if (err)
 768                      GOTO(err_exit, err);
 769
 770                 d_drop(dchild);
 771                 d_instantiate(dchild, inode);
 772                 EXIT;
 773         }
 774 err_exit:
 775         ptlrpc_req_finished(request);
 776
 777         return err;
 778 }
 779
 780 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 781                             unsigned rdev, struct dentry *dchild)
 782 {
 783         int err;
 784         ENTRY;
 785
 786         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 787                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 788                mode, rdev);
 789
 790         mode &= ~current->fs->umask;
 791
 792         switch (mode & S_IFMT) {
 793         case 0:
 794                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 795         case S_IFREG:
 796         case S_IFCHR:
 797         case S_IFBLK:
 798         case S_IFIFO:
 799         case S_IFSOCK:
 800                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 801                                   LUSTRE_OPC_MKNOD);
 802                 break;
 803         case S_IFDIR:
 804                 err = -EPERM;
 805                 break;
 806         default:
 807                 err = -EINVAL;
 808         }
 809         RETURN(err);
 810 }
 811
 812 #ifndef LUSTRE_KERNEL_VERSION
 813 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 814                         int mode, struct nameidata *nd)
 815 {
 816         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 817         int rc;
 818
 819         if (!it)
 820                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 821
 822         ll_d2d(dentry)->lld_it = NULL;
 823
 824         /* Was there an error? Propagate it! */
 825         if (it->d.lustre.it_status) {
 826                 rc = it->d.lustre.it_status;
 827                 goto out;
 828         }
 829
 830         rc = ll_create_it(dir, dentry, mode, it);
 831 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 832         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 833                 nd->intent.open.file->private_data = it;
 834                 lookup_instantiate_filp(nd, dentry, NULL);
 835         }
 836 #else
 837         ll_release_openhandle(dentry,it);
 838 #endif
 839
 840 out:
 841         ll_intent_release(it);
 842         OBD_FREE(it, sizeof(*it));
 843
 844         return rc;
 845 }
 846 #else
 847 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 848                         int mode, struct nameidata *nd)
 849 {
 850         if (!nd || !nd->intent.d.lustre.it_disposition)
 851                 /* No saved request? Just mknod the file */
 852                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 853
 854         return ll_create_it(dir, dentry, mode, &nd->intent);
 855 }
 856 #endif
 857
 858 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 859                               const char *tgt, struct dentry *dchild)
 860 {
 861         int err;
 862         ENTRY;
 863
 864         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 865                name->len, name->name, dir->i_ino, dir->i_generation,
 866                dir, 3000, tgt);
 867
 868         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 869                           0, dchild, LUSTRE_OPC_SYMLINK);
 870         RETURN(err);
 871 }
 872
 873 static int ll_link_generic(struct inode *src,  struct inode *dir,
 874                            struct qstr *name, struct dentry *dchild)
 875 {
 876         struct ll_sb_info *sbi = ll_i2sbi(dir);
 877         struct ptlrpc_request *request = NULL;
 878         struct md_op_data *op_data;
 879         int err;
 880
 881         ENTRY;
 882         CDEBUG(D_VFSTRACE,
 883                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
 884                src->i_ino, src->i_generation, src, dir->i_ino,
 885                dir->i_generation, dir, name->len, name->name);
 886
 887         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
 888                                      0, LUSTRE_OPC_ANY, NULL);
 889         if (IS_ERR(op_data))
 890                 RETURN(PTR_ERR(op_data));
 891
 892         err = md_link(sbi->ll_md_exp, op_data, &request);
 893         ll_finish_md_op_data(op_data);
 894         if (err)
 895                 GOTO(out, err);
 896         if (dchild)
 897                 d_drop(dchild);
 898
 899         ll_update_times(request, REPLY_REC_OFF, dir);
 900         EXIT;
 901 out:
 902         ptlrpc_req_finished(request);
 903         RETURN(err);
 904 }
 905
 906 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
 907                             int mode, struct dentry *dchild)
 908
 909 {
 910         int err;
 911         ENTRY;
 912
 913         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 914                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 915
 916         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
 917         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
 918
 919         RETURN(err);
 920 }
 921
 922 /* Try to find the child dentry by its name.
 923    If found, put the result fid into @fid. */
 924 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
 925                              struct lu_fid *fid)
 926 {
 927         struct dentry *parent, *child;
 928
 929         parent = list_entry(dir->i_dentry.next, struct dentry, d_alias);
 930         child = d_lookup(parent, name);
 931         if (child) {
 932                 if (child->d_inode)
 933                         *fid = *ll_inode2fid(child->d_inode);
 934                 dput(child);
 935         }
 936 }
 937
 938 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
 939                             struct dentry *dchild, struct qstr *name)
 940 {
 941         struct ptlrpc_request *request = NULL;
 942         struct md_op_data *op_data;
 943         int rc;
 944         ENTRY;
 945
 946         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 947                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 948
 949         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
 950                 RETURN(-EBUSY);
 951
 952         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
 953                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
 954         if (IS_ERR(op_data))
 955                 RETURN(PTR_ERR(op_data));
 956
 957         ll_get_child_fid(dir, name, &op_data->op_fid3);
 958         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
 959         ll_finish_md_op_data(op_data);
 960         if (rc == 0)
 961                 ll_update_times(request, REPLY_REC_OFF, dir);
 962         ptlrpc_req_finished(request);
 963         RETURN(rc);
 964 }
 965
 966 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
 967 {
 968         struct mdt_body *body;
 969         struct lov_mds_md *eadata;
 970         struct lov_stripe_md *lsm = NULL;
 971         struct obd_trans_info oti = { 0 };
 972         struct obdo *oa;
 973         int rc;
 974         ENTRY;
 975
 976         /* req is swabbed so this is safe */
 977         body = lustre_msg_buf(request->rq_repmsg, REPLY_REC_OFF, sizeof(*body));
 978
 979         if (!(body->valid & OBD_MD_FLEASIZE))
 980                 RETURN(0);
 981
 982         if (body->eadatasize == 0) {
 983                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
 984                 GOTO(out, rc = -EPROTO);
 985         }
 986
 987         /* The MDS sent back the EA because we unlinked the last reference
 988          * to this file. Use this EA to unlink the objects on the OST.
 989          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
 990          * check it is complete and sensible. */
 991         eadata = lustre_swab_repbuf(request, REPLY_REC_OFF + 1,
 992                                     body->eadatasize, NULL);
 993         LASSERT(eadata != NULL);
 994         if (eadata == NULL) {
 995                 CERROR("Can't unpack MDS EA data\n");
 996                 GOTO(out, rc = -EPROTO);
 997         }
 998
 999         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1000         if (rc < 0) {
1001                 CERROR("obd_unpackmd: %d\n", rc);
1002                 GOTO(out, rc);
1003         }
1004         LASSERT(rc >= sizeof(*lsm));
1005
1006         rc = obd_checkmd(ll_i2dtexp(dir), ll_i2mdexp(dir), lsm);
1007         if (rc)
1008                 GOTO(out_free_memmd, rc);
1009
1010         OBDO_ALLOC(oa);
1011         if (oa == NULL)
1012                 GOTO(out_free_memmd, rc = -ENOMEM);
1013
1014         oa->o_id = lsm->lsm_object_id;
1015         oa->o_gr = lsm->lsm_object_gr;
1016         oa->o_mode = body->mode & S_IFMT;
1017         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1018
1019         if (body->valid & OBD_MD_FLCOOKIE) {
1020                 oa->o_valid |= OBD_MD_FLCOOKIE;
1021                 oti.oti_logcookies =
1022                         lustre_msg_buf(request->rq_repmsg, REPLY_REC_OFF + 2,
1023                                        sizeof(struct llog_cookie) *
1024                                        lsm->lsm_stripe_count);
1025                 if (oti.oti_logcookies == NULL) {
1026                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1027                         body->valid &= ~OBD_MD_FLCOOKIE;
1028                 }
1029         }
1030
1031         rc = obd_destroy(ll_i2dtexp(dir), oa, lsm, &oti, ll_i2mdexp(dir));
1032         OBDO_FREE(oa);
1033         if (rc)
1034                 CERROR("obd destroy objid "LPX64" error %d\n",
1035                        lsm->lsm_object_id, rc);
1036  out_free_memmd:
1037         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1038  out:
1039         return rc;
1040 }
1041
1042 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1043                              struct dentry *dchild, struct qstr *name)
1044 {
1045         struct ptlrpc_request *request = NULL;
1046         struct md_op_data *op_data;
1047         int rc;
1048         ENTRY;
1049         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1050                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1051
1052         /*
1053          * XXX: unlink bind mountpoint maybe call to here,
1054          * just check it as vfs_unlink does.
1055          */
1056         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1057                 RETURN(-EBUSY);
1058
1059         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1060                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1061         if (IS_ERR(op_data))
1062                 RETURN(PTR_ERR(op_data));
1063
1064         ll_get_child_fid(dir, name, &op_data->op_fid3);
1065         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1066         ll_finish_md_op_data(op_data);
1067
1068         if (rc)
1069                 GOTO(out, rc);
1070
1071         ll_update_times(request, REPLY_REC_OFF, dir);
1072
1073         rc = ll_objects_destroy(request, dir);
1074  out:
1075         ptlrpc_req_finished(request);
1076         RETURN(rc);
1077 }
1078
1079 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1080                              struct dentry *src_dchild, struct qstr *src_name,
1081                              struct inode *tgt, struct dentry *tgt_dparent,
1082                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1083 {
1084         struct ptlrpc_request *request = NULL;
1085         struct ll_sb_info *sbi = ll_i2sbi(src);
1086         struct md_op_data *op_data;
1087         int err;
1088         ENTRY;
1089         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1090                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1091                src->i_ino, src->i_generation, src, tgt_name->len,
1092                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1093
1094         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1095             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1096                 RETURN(-EBUSY);
1097
1098         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1099                                      LUSTRE_OPC_ANY, NULL);
1100         if (IS_ERR(op_data))
1101                 RETURN(PTR_ERR(op_data));
1102
1103         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1104         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1105         err = md_rename(sbi->ll_md_exp, op_data,
1106                         src_name->name, src_name->len,
1107                         tgt_name->name, tgt_name->len, &request);
1108         ll_finish_md_op_data(op_data);
1109         if (!err) {
1110                 ll_update_times(request, REPLY_REC_OFF, src);
1111                 ll_update_times(request, REPLY_REC_OFF, tgt);
1112                 err = ll_objects_destroy(request, src);
1113         }
1114
1115         ptlrpc_req_finished(request);
1116
1117         RETURN(err);
1118 }
1119
1120 #ifdef LUSTRE_KERNEL_VERSION
1121 static int ll_mknod_raw(struct nameidata *nd, int mode, dev_t rdev)
1122 {
1123         return ll_mknod_generic(nd->dentry->d_inode, &nd->last, mode,rdev,NULL);
1124 }
1125 static int ll_rename_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1126 {
1127         return ll_rename_generic(srcnd->dentry->d_inode, srcnd->dentry,
1128                                  NULL, &srcnd->last,
1129                                  tgtnd->dentry->d_inode, tgtnd->dentry,
1130                                  NULL, &tgtnd->last);
1131 }
1132 static int ll_link_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1133 {
1134         return ll_link_generic(srcnd->dentry->d_inode, tgtnd->dentry->d_inode,
1135                                &tgtnd->last, NULL);
1136 }
1137 static int ll_symlink_raw(struct nameidata *nd, const char *tgt)
1138 {
1139         return ll_symlink_generic(nd->dentry->d_inode, &nd->last, tgt, NULL);
1140 }
1141 static int ll_rmdir_raw(struct nameidata *nd)
1142 {
1143         return ll_rmdir_generic(nd->dentry->d_inode, nd->dentry, NULL,
1144                                 &nd->last);
1145 }
1146 static int ll_mkdir_raw(struct nameidata *nd, int mode)
1147 {
1148         return ll_mkdir_generic(nd->dentry->d_inode, &nd->last, mode, NULL);
1149 }
1150 static int ll_unlink_raw(struct nameidata *nd)
1151 {
1152         return ll_unlink_generic(nd->dentry->d_inode, nd->dentry, NULL,
1153                                  &nd->last);
1154 }
1155 #endif
1156
1157 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1158                     ll_dev_t rdev)
1159 {
1160         return ll_mknod_generic(dir, &dchild->d_name, mode,
1161                                 old_encode_dev(rdev), dchild);
1162 }
1163
1164 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1165 {
1166         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1167 }
1168 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1169 {
1170         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1171 }
1172 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1173 {
1174         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1175 }
1176 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1177                       const char *oldname)
1178 {
1179         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1180 }
1181 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1182                    struct dentry *new_dentry)
1183 {
1184         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1185                                new_dentry);
1186 }
1187 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1188                      struct inode *new_dir, struct dentry *new_dentry)
1189 {
1190         return ll_rename_generic(old_dir, NULL,
1191                                  old_dentry, &old_dentry->d_name,
1192                                  new_dir, NULL, new_dentry,
1193                                  &new_dentry->d_name);
1194 }
1195
1196 struct inode_operations ll_dir_inode_operations = {
1197 #ifdef LUSTRE_KERNEL_VERSION
1198         .link_raw           = ll_link_raw,
1199         .unlink_raw         = ll_unlink_raw,
1200         .symlink_raw        = ll_symlink_raw,
1201         .mkdir_raw          = ll_mkdir_raw,
1202         .rmdir_raw          = ll_rmdir_raw,
1203         .mknod_raw          = ll_mknod_raw,
1204         .rename_raw         = ll_rename_raw,
1205         .setattr            = ll_setattr,
1206         .setattr_raw        = ll_setattr_raw,
1207 #endif
1208         .mknod              = ll_mknod,
1209         .lookup             = ll_lookup_nd,
1210         .create             = ll_create_nd,
1211         /* We need all these non-raw things for NFSD, to not patch it. */
1212         .unlink             = ll_unlink,
1213         .mkdir              = ll_mkdir,
1214         .rmdir              = ll_rmdir,
1215         .symlink            = ll_symlink,
1216         .link               = ll_link,
1217         .rename             = ll_rename,
1218         .setattr            = ll_setattr,
1219         .getattr            = ll_getattr,
1220         .permission         = ll_inode_permission,
1221         .setxattr           = ll_setxattr,
1222         .getxattr           = ll_getxattr,
1223         .listxattr          = ll_listxattr,
1224         .removexattr        = ll_removexattr,
1225 };
1226
1227 struct inode_operations ll_special_inode_operations = {
1228 #ifdef LUSTRE_KERNEL_VERSION
1229         .setattr_raw    = ll_setattr_raw,
1230 #endif
1231         .setattr        = ll_setattr,
1232         .getattr        = ll_getattr,
1233         .permission     = ll_inode_permission,
1234         .setxattr       = ll_setxattr,
1235         .getxattr       = ll_getxattr,
1236         .listxattr      = ll_listxattr,
1237         .removexattr    = ll_removexattr,
1238 };