lustre/llite/namei.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  30  * Use is subject to license terms.
  31  *
  32  * Copyright (c) 2011 Whamcloud, Inc.
  33  *
  34  */
  35 /*
  36  * This file is part of Lustre, http://www.lustre.org/
  37  * Lustre is a trademark of Sun Microsystems, Inc.
  38  */
  39
  40 #include <linux/fs.h>
  41 #include <linux/sched.h>
  42 #include <linux/mm.h>
  43 #include <linux/smp_lock.h>
  44 #include <linux/quotaops.h>
  45 #include <linux/highmem.h>
  46 #include <linux/pagemap.h>
  47
  48 #define DEBUG_SUBSYSTEM S_LLITE
  49
  50 #include <obd_support.h>
  51 #include <lustre_fid.h>
  52 #include <lustre_lite.h>
  53 #include <lustre_dlm.h>
  54 #include <lustre_ver.h>
  55 #include "llite_internal.h"
  56
  57 /*
  58  * Check if we have something mounted at the named dchild.
  59  * In such a case there would always be dentry present.
  60  */
  61 static int ll_d_mountpoint(struct dentry *dparent, struct dentry *dchild,
  62                            struct qstr *name)
  63 {
  64         int mounted = 0;
  65
  66         if (unlikely(dchild)) {
  67                 mounted = d_mountpoint(dchild);
  68         } else if (dparent) {
  69                 dchild = d_lookup(dparent, name);
  70                 if (dchild) {
  71                         mounted = d_mountpoint(dchild);
  72                         dput(dchild);
  73                 }
  74         }
  75         return mounted;
  76 }
  77
  78 int ll_unlock(__u32 mode, struct lustre_handle *lockh)
  79 {
  80         ENTRY;
  81
  82         ldlm_lock_decref(lockh, mode);
  83
  84         RETURN(0);
  85 }
  86
  87
  88 /* called from iget5_locked->find_inode() under inode_lock spinlock */
  89 static int ll_test_inode(struct inode *inode, void *opaque)
  90 {
  91         struct ll_inode_info *lli = ll_i2info(inode);
  92         struct lustre_md     *md = opaque;
  93
  94         if (unlikely(!(md->body->valid & OBD_MD_FLID))) {
  95                 CERROR("MDS body missing FID\n");
  96                 return 0;
  97         }
  98
  99         if (!lu_fid_eq(&lli->lli_fid, &md->body->fid1))
 100                 return 0;
 101
 102         return 1;
 103 }
 104
 105 static int ll_set_inode(struct inode *inode, void *opaque)
 106 {
 107         struct ll_inode_info *lli = ll_i2info(inode);
 108         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
 109
 110         if (unlikely(!(body->valid & OBD_MD_FLID))) {
 111                 CERROR("MDS body missing FID\n");
 112                 return -EINVAL;
 113         }
 114
 115         lli->lli_fid = body->fid1;
 116         return 0;
 117 }
 118
 119
 120 /*
 121  * Get an inode by inode number (already instantiated by the intent lookup).
 122  * Returns inode or NULL
 123  */
 124 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 125                       struct lustre_md *md)
 126 {
 127         struct inode         *inode;
 128         ENTRY;
 129
 130         LASSERT(hash != 0);
 131         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
 132
 133         if (inode) {
 134                 if (inode->i_state & I_NEW) {
 135                         int rc = 0;
 136
 137                         ll_read_inode2(inode, md);
 138                         if (S_ISREG(inode->i_mode) &&
 139                             ll_i2info(inode)->lli_clob == NULL)
 140                                 rc = cl_inode_init(inode, md);
 141                         if (rc != 0) {
 142                                 md->lsm = NULL;
 143                                 make_bad_inode(inode);
 144                                 unlock_new_inode(inode);
 145                                 iput(inode);
 146                                 inode = ERR_PTR(rc);
 147                         } else
 148                                 unlock_new_inode(inode);
 149                 } else if (!(inode->i_state & (I_FREEING | I_CLEAR)))
 150                                 ll_update_inode(inode, md);
 151                 CDEBUG(D_VFSTRACE, "got inode: %p for "DFID"\n",
 152                        inode, PFID(&md->body->fid1));
 153         }
 154         RETURN(inode);
 155 }
 156
 157 static void ll_drop_negative_dentry(struct inode *dir)
 158 {
 159         struct dentry *dentry, *tmp_alias, *tmp_subdir;
 160
 161         cfs_spin_lock(&ll_lookup_lock);
 162         spin_lock(&dcache_lock);
 163 restart:
 164         list_for_each_entry_safe(dentry, tmp_alias,
 165                                  &dir->i_dentry,d_alias) {
 166                 if (!list_empty(&dentry->d_subdirs)) {
 167                         struct dentry *child;
 168                         list_for_each_entry_safe(child, tmp_subdir,
 169                                                  &dentry->d_subdirs,
 170                                                  d_child) {
 171                                 /* XXX Print some debug here? */
 172                                 if (!child->d_inode)
 173                                 /* Negative dentry. If we were
 174                                    dropping dcache lock, go
 175                                    throught the list again */
 176                                         if (ll_drop_dentry(child))
 177                                                 goto restart;
 178                         }
 179                 }
 180         }
 181         spin_unlock(&dcache_lock);
 182         cfs_spin_unlock(&ll_lookup_lock);
 183 }
 184
 185
 186 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 187                        void *data, int flag)
 188 {
 189         int rc;
 190         struct lustre_handle lockh;
 191         ENTRY;
 192
 193         switch (flag) {
 194         case LDLM_CB_BLOCKING:
 195                 ldlm_lock2handle(lock, &lockh);
 196                 rc = ldlm_cli_cancel(&lockh);
 197                 if (rc < 0) {
 198                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 199                         RETURN(rc);
 200                 }
 201                 break;
 202         case LDLM_CB_CANCELING: {
 203                 struct inode *inode = ll_inode_from_lock(lock);
 204                 struct ll_inode_info *lli;
 205                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 206                 struct lu_fid *fid;
 207                 ldlm_mode_t mode = lock->l_req_mode;
 208
 209                 /* Invalidate all dentries associated with this inode */
 210                 if (inode == NULL)
 211                         break;
 212
 213                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
 214                 /* For OPEN locks we differentiate between lock modes - CR, CW. PR - bug 22891 */
 215                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE))
 216                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
 217
 218                 if (bits & MDS_INODELOCK_OPEN)
 219                         ll_have_md_lock(inode, &bits, mode);
 220
 221                 fid = ll_inode2fid(inode);
 222                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
 223                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
 224                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
 225                         LDLM_ERROR(lock, "data mismatch with object "
 226                                    DFID" (%p)", PFID(fid), inode);
 227                 }
 228
 229                 if (bits & MDS_INODELOCK_OPEN) {
 230                         int flags = 0;
 231                         switch (lock->l_req_mode) {
 232                         case LCK_CW:
 233                                 flags = FMODE_WRITE;
 234                                 break;
 235                         case LCK_PR:
 236                                 flags = FMODE_EXEC;
 237                                 break;
 238                         case LCK_CR:
 239                                 flags = FMODE_READ;
 240                                 break;
 241                         default:
 242                                 CERROR("Unexpected lock mode for OPEN lock "
 243                                        "%d, inode %ld\n", lock->l_req_mode,
 244                                        inode->i_ino);
 245                         }
 246                         ll_md_real_close(inode, flags);
 247                 }
 248
 249                 lli = ll_i2info(inode);
 250                 if (bits & MDS_INODELOCK_UPDATE)
 251                         lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 252
 253                 if (S_ISDIR(inode->i_mode) &&
 254                      (bits & MDS_INODELOCK_UPDATE)) {
 255                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 256                                inode->i_ino);
 257                         truncate_inode_pages(inode->i_mapping, 0);
 258                         ll_drop_negative_dentry(inode);
 259                 }
 260
 261                 if (inode->i_sb->s_root &&
 262                     inode != inode->i_sb->s_root->d_inode &&
 263                     (bits & MDS_INODELOCK_LOOKUP))
 264                         ll_unhash_aliases(inode);
 265                 iput(inode);
 266                 break;
 267         }
 268         default:
 269                 LBUG();
 270         }
 271
 272         RETURN(0);
 273 }
 274
 275 __u32 ll_i2suppgid(struct inode *i)
 276 {
 277         if (cfs_curproc_is_in_groups(i->i_gid))
 278                 return (__u32)i->i_gid;
 279         else
 280                 return (__u32)(-1);
 281 }
 282
 283 /* Pack the required supplementary groups into the supplied groups array.
 284  * If we don't need to use the groups from the target inode(s) then we
 285  * instead pack one or more groups from the user's supplementary group
 286  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 287 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 288 {
 289 #if 0
 290         int i;
 291 #endif
 292
 293         LASSERT(i1 != NULL);
 294         LASSERT(suppgids != NULL);
 295
 296         suppgids[0] = ll_i2suppgid(i1);
 297
 298         if (i2)
 299                 suppgids[1] = ll_i2suppgid(i2);
 300                 else
 301                         suppgids[1] = -1;
 302
 303 #if 0
 304         for (i = 0; i < current_ngroups; i++) {
 305                 if (suppgids[0] == -1) {
 306                         if (current_groups[i] != suppgids[1])
 307                                 suppgids[0] = current_groups[i];
 308                         continue;
 309                 }
 310                 if (suppgids[1] == -1) {
 311                         if (current_groups[i] != suppgids[0])
 312                                 suppgids[1] = current_groups[i];
 313                         continue;
 314                 }
 315                 break;
 316         }
 317 #endif
 318 }
 319
 320 static void ll_d_add(struct dentry *de, struct inode *inode)
 321 {
 322         CDEBUG(D_DENTRY, "adding inode %p to dentry %p\n", inode, de);
 323         /* d_instantiate */
 324         if (!list_empty(&de->d_alias)) {
 325                 spin_unlock(&dcache_lock);
 326                 CERROR("dentry %.*s %p alias next %p, prev %p\n",
 327                        de->d_name.len, de->d_name.name, de,
 328                        de->d_alias.next, de->d_alias.prev);
 329                 LBUG();
 330         }
 331         if (inode)
 332                 list_add(&de->d_alias, &inode->i_dentry);
 333         de->d_inode = inode;
 334
 335         /* d_rehash */
 336         if (!d_unhashed(de)) {
 337                 spin_unlock(&dcache_lock);
 338                 CERROR("dentry %.*s %p hash next %p\n",
 339                        de->d_name.len, de->d_name.name, de, de->d_hash.next);
 340                 LBUG();
 341         }
 342         d_rehash_cond(de, 0);
 343 }
 344
 345 /* Search "inode"'s alias list for a dentry that has the same name and parent
 346  * as de.  If found, return it.  If not found, return de.
 347  * Lustre can't use d_add_unique because don't unhash aliases for directory
 348  * in ll_revalidate_it.  After revaliadate inode will be have hashed aliases
 349  * and it triggers BUG_ON in d_instantiate_unique (bug #10954).
 350  */
 351 struct dentry *ll_find_alias(struct inode *inode, struct dentry *de)
 352 {
 353         struct list_head *tmp;
 354         struct dentry *dentry;
 355         struct dentry *last_discon = NULL;
 356
 357         cfs_spin_lock(&ll_lookup_lock);
 358         spin_lock(&dcache_lock);
 359         list_for_each(tmp, &inode->i_dentry) {
 360                 dentry = list_entry(tmp, struct dentry, d_alias);
 361
 362                 /* We are called here with 'de' already on the aliases list. */
 363                 if (unlikely(dentry == de)) {
 364                         CERROR("whoops\n");
 365                         continue;
 366                 }
 367
 368                 if (dentry->d_flags & DCACHE_DISCONNECTED) {
 369                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
 370                         last_discon = dentry;
 371                         continue;
 372                 }
 373
 374                 if (dentry->d_parent != de->d_parent)
 375                         continue;
 376
 377                 if (dentry->d_name.hash != de->d_name.hash)
 378                         continue;
 379
 380                 if (dentry->d_name.len != de->d_name.len)
 381                         continue;
 382
 383                 if (memcmp(dentry->d_name.name, de->d_name.name,
 384                            de->d_name.len) != 0)
 385                         continue;
 386
 387                 dget_locked(dentry);
 388                 ll_dops_init(dentry, 0, 1);
 389                 ll_dentry_rehash(dentry, 1);
 390                 spin_unlock(&dcache_lock);
 391                 cfs_spin_unlock(&ll_lookup_lock);
 392                 iput(inode);
 393                 CDEBUG(D_DENTRY, "alias dentry %.*s (%p) parent %p inode %p "
 394                        "refc %d\n", de->d_name.len, de->d_name.name, de,
 395                        de->d_parent, de->d_inode, atomic_read(&de->d_count));
 396                 return dentry;
 397         }
 398
 399         if (last_discon) {
 400                 CDEBUG(D_DENTRY, "Reuse disconnected dentry %p inode %p "
 401                         "refc %d\n", last_discon, last_discon->d_inode,
 402                         atomic_read(&last_discon->d_count));
 403                 dget_locked(last_discon);
 404                 lock_dentry(last_discon);
 405                 last_discon->d_flags |= DCACHE_LUSTRE_INVALID;
 406                 unlock_dentry(last_discon);
 407                 spin_unlock(&dcache_lock);
 408                 cfs_spin_unlock(&ll_lookup_lock);
 409                 ll_dops_init(last_discon, 1, 1);
 410                 d_rehash(de);
 411                 d_move(last_discon, de);
 412                 iput(inode);
 413                 return last_discon;
 414         }
 415         lock_dentry(de);
 416         de->d_flags |= DCACHE_LUSTRE_INVALID;
 417         unlock_dentry(de);
 418         ll_d_add(de, inode);
 419
 420         spin_unlock(&dcache_lock);
 421         cfs_spin_unlock(&ll_lookup_lock);
 422
 423         return de;
 424 }
 425
 426 int ll_lookup_it_finish(struct ptlrpc_request *request,
 427                         struct lookup_intent *it, void *data)
 428 {
 429         struct it_cb_data *icbd = data;
 430         struct dentry **de = icbd->icbd_childp;
 431         struct inode *parent = icbd->icbd_parent;
 432         struct inode *inode = NULL;
 433         int rc;
 434         ENTRY;
 435
 436         /* NB 1 request reference will be taken away by ll_intent_lock()
 437          * when I return */
 438         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 439                 struct dentry *save = *de;
 440                 __u64 bits = 0;
 441
 442                 rc = ll_prep_inode(&inode, request, (*de)->d_sb);
 443                 if (rc)
 444                         RETURN(rc);
 445
 446                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
 447
 448                 /* We used to query real size from OSTs here, but actually
 449                    this is not needed. For stat() calls size would be updated
 450                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 451                    2.4 and
 452                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 453                    Everybody else who needs correct file size would call
 454                    cl_glimpse_size or some equivalent themselves anyway.
 455                    Also see bug 7198. */
 456                 ll_dops_init(*de, 1, 1);
 457                 *de = ll_find_alias(inode, *de);
 458                 if (*de != save) {
 459                         struct ll_dentry_data *lld = ll_d2d(*de);
 460
 461                         /* just make sure the ll_dentry_data is ready */
 462                         if (unlikely(lld == NULL))
 463                                 ll_dops_init(*de, 1, 1);
 464                 }
 465                 /* we have lookup look - unhide dentry */
 466                 ll_dentry_reset_flags(*de, bits);
 467         } else {
 468                 __u64 ibits;
 469
 470                 ll_dops_init(*de, 1, 1);
 471                 /* Check that parent has UPDATE lock. If there is none, we
 472                    cannot afford to hash this dentry (done by ll_d_add) as it
 473                    might get picked up later when UPDATE lock will appear */
 474                 ibits = MDS_INODELOCK_UPDATE;
 475                 if (ll_have_md_lock(parent, &ibits, LCK_MINMODE)) {
 476                         spin_lock(&dcache_lock);
 477                         ll_d_add(*de, NULL);
 478                         spin_unlock(&dcache_lock);
 479                 } else {
 480                         /* negative lookup - and don't have update lock to
 481                          * parent */
 482                         lock_dentry(*de);
 483                         (*de)->d_flags |= DCACHE_LUSTRE_INVALID;
 484                         unlock_dentry(*de);
 485
 486                         (*de)->d_inode = NULL;
 487                         /* We do not want to hash the dentry if don`t have a
 488                          * lock, but if this dentry is later used in d_move,
 489                          * we'd hit uninitialised list head d_hash, so we just
 490                          * do this to init d_hash field but leave dentry
 491                          * unhashed. (bug 10796). */
 492                         d_rehash(*de);
 493                         d_drop(*de);
 494                 }
 495         }
 496
 497         RETURN(0);
 498 }
 499
 500 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 501                                    struct lookup_intent *it, int lookup_flags)
 502 {
 503         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 504         struct dentry *save = dentry, *retval;
 505         struct ptlrpc_request *req = NULL;
 506         struct md_op_data *op_data;
 507         struct it_cb_data icbd;
 508         __u32 opc;
 509         int rc;
 510         ENTRY;
 511
 512         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 513                 RETURN(ERR_PTR(-ENAMETOOLONG));
 514
 515         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 516                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 517                parent->i_generation, parent, LL_IT2STR(it));
 518
 519         if (d_mountpoint(dentry))
 520                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 521
 522         ll_frob_intent(&it, &lookup_it);
 523
 524         /* As do_lookup is called before follow_mount, root dentry may be left
 525          * not valid, revalidate it here. */
 526         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 527             (it->it_op & (IT_OPEN | IT_CREAT))) {
 528                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it,
 529                                             MDS_INODELOCK_LOOKUP);
 530                 if (rc)
 531                         RETURN(ERR_PTR(rc));
 532         }
 533
 534         if (it->it_op == IT_GETATTR) {
 535                 rc = ll_statahead_enter(parent, &dentry, 0);
 536                 if (rc == 1) {
 537                         if (dentry == save)
 538                                 GOTO(out, retval = NULL);
 539                         GOTO(out, retval = dentry);
 540                 }
 541         }
 542
 543         icbd.icbd_childp = &dentry;
 544         icbd.icbd_parent = parent;
 545
 546         if (it->it_op & IT_CREAT ||
 547             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 548                 opc = LUSTRE_OPC_CREATE;
 549         else
 550                 opc = LUSTRE_OPC_ANY;
 551
 552         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 553                                      dentry->d_name.len, lookup_flags, opc,
 554                                      NULL);
 555         if (IS_ERR(op_data))
 556                 RETURN((void *)op_data);
 557
 558         it->it_create_mode &= ~cfs_curproc_umask();
 559
 560         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 561                             lookup_flags, &req, ll_md_blocking_ast, 0);
 562         ll_finish_md_op_data(op_data);
 563         if (rc < 0)
 564                 GOTO(out, retval = ERR_PTR(rc));
 565
 566         rc = ll_lookup_it_finish(req, it, &icbd);
 567         if (rc != 0) {
 568                 ll_intent_release(it);
 569                 GOTO(out, retval = ERR_PTR(rc));
 570         }
 571
 572         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 573             !S_ISREG(dentry->d_inode->i_mode) &&
 574             !S_ISDIR(dentry->d_inode->i_mode)) {
 575                 ll_release_openhandle(dentry, it);
 576         }
 577         ll_lookup_finish_locks(it, dentry);
 578
 579         if (dentry == save)
 580                 GOTO(out, retval = NULL);
 581         else
 582                 GOTO(out, retval = dentry);
 583  out:
 584         if (req)
 585                 ptlrpc_req_finished(req);
 586         if (it->it_op == IT_GETATTR && (retval == NULL || retval == dentry))
 587                 ll_statahead_mark(parent, dentry);
 588         return retval;
 589 }
 590
 591 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 592                                         int lookup_flags)
 593 {
 594         struct lookup_intent *it;
 595
 596         OBD_ALLOC(it, sizeof(*it));
 597         if (!it)
 598                 return ERR_PTR(-ENOMEM);
 599
 600         if (lookup_flags & LOOKUP_OPEN) {
 601                 it->it_op = IT_OPEN;
 602                 if (lookup_flags & LOOKUP_CREATE)
 603                         it->it_op |= IT_CREAT;
 604                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
 605                 it->it_flags = oit->flags;
 606         } else {
 607                 it->it_op = IT_GETATTR;
 608         }
 609
 610 #ifndef HAVE_FILE_IN_STRUCT_INTENT
 611                 /* Since there is no way to pass our intent to ll_file_open,
 612                  * just check the file is there. Actual open will be done
 613                  * in ll_file_open */
 614                 if (it->it_op & IT_OPEN)
 615                         it->it_op = IT_LOOKUP;
 616 #endif
 617
 618         return it;
 619 }
 620
 621 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 622                                    struct nameidata *nd)
 623 {
 624         struct dentry *de;
 625         ENTRY;
 626
 627         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 628                 struct lookup_intent *it;
 629
 630 #if defined(HAVE_FILE_IN_STRUCT_INTENT) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 631                 /* Did we came here from failed revalidate just to propagate
 632                  * its error? */
 633                 if (nd->flags & LOOKUP_OPEN)
 634                         if (IS_ERR(nd->intent.open.file))
 635                                 RETURN((struct dentry *)nd->intent.open.file);
 636 #endif
 637                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 638                         it = ll_d2d(dentry)->lld_it;
 639                         ll_d2d(dentry)->lld_it = NULL;
 640                 } else {
 641                         if ((nd->flags & LOOKUP_CREATE ) && !(nd->flags & LOOKUP_OPEN)) {
 642                                 /* We are sure this is new dentry, so we need to create
 643                                    our private data and set the dentry ops */
 644                                 ll_dops_init(dentry, 1, 1);
 645                                 RETURN(NULL);
 646                         }
 647                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 648                         if (IS_ERR(it))
 649                                 RETURN((struct dentry *)it);
 650                 }
 651
 652                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 653                 if (de)
 654                         dentry = de;
 655                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 656                         if (dentry->d_inode &&
 657                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 658 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 659                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 660                                         // We cannot call open here as it would
 661                                         // deadlock.
 662                                         ptlrpc_req_finished(
 663                                                        (struct ptlrpc_request *)
 664                                                           it->d.lustre.it_data);
 665                                 } else {
 666 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 667 /* 2.6.1[456] have a bug in open_namei() that forgets to check
 668  * nd->intent.open.file for error, so we need to return it as lookup's result
 669  * instead */
 670                                         struct file *filp;
 671                                         nd->intent.open.file->private_data = it;
 672                                         filp =lookup_instantiate_filp(nd,dentry,
 673                                                                       NULL);
 674                                         if (IS_ERR(filp)) {
 675                                                 if (de)
 676                                                         dput(de);
 677                                                 de = (struct dentry *) filp;
 678                                         }
 679 #else
 680                                         nd->intent.open.file->private_data = it;
 681                                         (void)lookup_instantiate_filp(nd,dentry,
 682                                                                       NULL);
 683 #endif
 684
 685                                 }
 686 #else /* HAVE_FILE_IN_STRUCT_INTENT */
 687                                 /* Release open handle as we have no way to
 688                                  * pass it to ll_file_open */
 689                                 ll_release_openhandle(dentry, it);
 690 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
 691                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 692                                 // XXX This can only reliably work on assumption
 693                                 // that there are NO hashed negative dentries.
 694                                 ll_d2d(dentry)->lld_it = it;
 695                                 it = NULL; /* Will be freed in ll_create_nd */
 696                                 /* We absolutely depend on ll_create_nd to be
 697                                  * called to not leak this intent and possible
 698                                  * data attached to it */
 699                         }
 700                 }
 701
 702                 if (it) {
 703                         ll_intent_release(it);
 704                         OBD_FREE(it, sizeof(*it));
 705                 }
 706         } else {
 707                 de = ll_lookup_it(parent, dentry, NULL, 0);
 708         }
 709
 710         RETURN(de);
 711 }
 712
 713 /* We depend on "mode" being set with the proper file type/umask by now */
 714 static struct inode *ll_create_node(struct inode *dir, const char *name,
 715                                     int namelen, const void *data, int datalen,
 716                                     int mode, __u64 extra,
 717                                     struct lookup_intent *it)
 718 {
 719         struct inode *inode = NULL;
 720         struct ptlrpc_request *request = NULL;
 721         struct ll_sb_info *sbi = ll_i2sbi(dir);
 722         int rc;
 723         ENTRY;
 724
 725         LASSERT(it && it->d.lustre.it_disposition);
 726
 727         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 728         request = it->d.lustre.it_data;
 729         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 730         rc = ll_prep_inode(&inode, request, dir->i_sb);
 731         if (rc)
 732                 GOTO(out, inode = ERR_PTR(rc));
 733
 734         LASSERT(list_empty(&inode->i_dentry));
 735
 736         /* We asked for a lock on the directory, but were granted a
 737          * lock on the inode.  Since we finally have an inode pointer,
 738          * stuff it in the lock. */
 739         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 740                inode, inode->i_ino, inode->i_generation);
 741         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
 742         EXIT;
 743  out:
 744         ptlrpc_req_finished(request);
 745         return inode;
 746 }
 747
 748 /*
 749  * By the time this is called, we already have created the directory cache
 750  * entry for the new file, but it is so far negative - it has no inode.
 751  *
 752  * We defer creating the OBD object(s) until open, to keep the intent and
 753  * non-intent code paths similar, and also because we do not have the MDS
 754  * inode number before calling ll_create_node() (which is needed for LOV),
 755  * so we would need to do yet another RPC to the MDS to store the LOV EA
 756  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 757  * lmm_size in datalen (the MDS still has code which will handle that).
 758  *
 759  * If the create succeeds, we fill in the inode information
 760  * with d_instantiate().
 761  */
 762 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 763                         struct lookup_intent *it)
 764 {
 765         struct inode *inode;
 766         int rc = 0;
 767         ENTRY;
 768
 769         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 770                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 771                dir->i_generation, dir, LL_IT2STR(it));
 772
 773         rc = it_open_error(DISP_OPEN_CREATE, it);
 774         if (rc)
 775                 RETURN(rc);
 776
 777         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 778                                NULL, 0, mode, 0, it);
 779         if (IS_ERR(inode))
 780                 RETURN(PTR_ERR(inode));
 781
 782         d_instantiate(dentry, inode);
 783         /* Negative dentry may be unhashed if parent does not have UPDATE lock,
 784          * but some callers, e.g. do_coredump, expect dentry to be hashed after
 785          * successful create. Hash it here. */
 786         spin_lock(&dcache_lock);
 787         if (d_unhashed(dentry))
 788                 d_rehash_cond(dentry, 0);
 789         spin_unlock(&dcache_lock);
 790         RETURN(0);
 791 }
 792
 793 static void ll_update_times(struct ptlrpc_request *request,
 794                             struct inode *inode)
 795 {
 796         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 797                                                        &RMF_MDT_BODY);
 798
 799         LASSERT(body);
 800         if (body->valid & OBD_MD_FLMTIME &&
 801             body->mtime > LTIME_S(inode->i_mtime)) {
 802                 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to "LPU64"\n",
 803                        inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
 804                 LTIME_S(inode->i_mtime) = body->mtime;
 805         }
 806         if (body->valid & OBD_MD_FLCTIME &&
 807             body->ctime > LTIME_S(inode->i_ctime))
 808                 LTIME_S(inode->i_ctime) = body->ctime;
 809 }
 810
 811 static int ll_new_node(struct inode *dir, struct qstr *name,
 812                        const char *tgt, int mode, int rdev,
 813                        struct dentry *dchild, __u32 opc)
 814 {
 815         struct ptlrpc_request *request = NULL;
 816         struct md_op_data *op_data;
 817         struct inode *inode = NULL;
 818         struct ll_sb_info *sbi = ll_i2sbi(dir);
 819         int tgt_len = 0;
 820         int err;
 821
 822         ENTRY;
 823         if (unlikely(tgt != NULL))
 824                 tgt_len = strlen(tgt) + 1;
 825
 826         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 827                                      name->len, 0, opc, NULL);
 828         if (IS_ERR(op_data))
 829                 GOTO(err_exit, err = PTR_ERR(op_data));
 830
 831         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 832                         cfs_curproc_fsuid(), cfs_curproc_fsgid(),
 833                         cfs_curproc_cap_pack(), rdev, &request);
 834         ll_finish_md_op_data(op_data);
 835         if (err)
 836                 GOTO(err_exit, err);
 837
 838         ll_update_times(request, dir);
 839
 840         if (dchild) {
 841                 err = ll_prep_inode(&inode, request, dchild->d_sb);
 842                 if (err)
 843                      GOTO(err_exit, err);
 844
 845                 d_drop(dchild);
 846                 d_instantiate(dchild, inode);
 847         }
 848         EXIT;
 849 err_exit:
 850         ptlrpc_req_finished(request);
 851
 852         return err;
 853 }
 854
 855 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 856                             unsigned rdev, struct dentry *dchild)
 857 {
 858         int err;
 859         ENTRY;
 860
 861         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 862                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 863                mode, rdev);
 864
 865         mode &= ~cfs_curproc_umask();
 866
 867         switch (mode & S_IFMT) {
 868         case 0:
 869                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 870         case S_IFREG:
 871         case S_IFCHR:
 872         case S_IFBLK:
 873         case S_IFIFO:
 874         case S_IFSOCK:
 875                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 876                                   LUSTRE_OPC_MKNOD);
 877                 break;
 878         case S_IFDIR:
 879                 err = -EPERM;
 880                 break;
 881         default:
 882                 err = -EINVAL;
 883         }
 884         RETURN(err);
 885 }
 886
 887 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 888                         int mode, struct nameidata *nd)
 889 {
 890         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 891         int rc;
 892
 893         if (!it)
 894                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 895
 896         ll_d2d(dentry)->lld_it = NULL;
 897
 898         /* Was there an error? Propagate it! */
 899         if (it->d.lustre.it_status) {
 900                 rc = it->d.lustre.it_status;
 901                 goto out;
 902         }
 903
 904         rc = ll_create_it(dir, dentry, mode, it);
 905 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 906         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 907                 nd->intent.open.file->private_data = it;
 908                 lookup_instantiate_filp(nd, dentry, NULL);
 909         }
 910 #else
 911         ll_release_openhandle(dentry,it);
 912 #endif
 913
 914 out:
 915         ll_intent_release(it);
 916         OBD_FREE(it, sizeof(*it));
 917
 918         return rc;
 919 }
 920
 921 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 922                               const char *tgt, struct dentry *dchild)
 923 {
 924         int err;
 925         ENTRY;
 926
 927         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 928                name->len, name->name, dir->i_ino, dir->i_generation,
 929                dir, 3000, tgt);
 930
 931         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 932                           0, dchild, LUSTRE_OPC_SYMLINK);
 933         RETURN(err);
 934 }
 935
 936 static int ll_link_generic(struct inode *src,  struct inode *dir,
 937                            struct qstr *name, struct dentry *dchild)
 938 {
 939         struct ll_sb_info *sbi = ll_i2sbi(dir);
 940         struct ptlrpc_request *request = NULL;
 941         struct md_op_data *op_data;
 942         int err;
 943
 944         ENTRY;
 945         CDEBUG(D_VFSTRACE,
 946                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
 947                src->i_ino, src->i_generation, src, dir->i_ino,
 948                dir->i_generation, dir, name->len, name->name);
 949
 950         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
 951                                      0, LUSTRE_OPC_ANY, NULL);
 952         if (IS_ERR(op_data))
 953                 RETURN(PTR_ERR(op_data));
 954
 955         err = md_link(sbi->ll_md_exp, op_data, &request);
 956         ll_finish_md_op_data(op_data);
 957         if (err)
 958                 GOTO(out, err);
 959         if (dchild)
 960                 d_drop(dchild);
 961
 962         ll_update_times(request, dir);
 963         EXIT;
 964 out:
 965         ptlrpc_req_finished(request);
 966         RETURN(err);
 967 }
 968
 969 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
 970                             int mode, struct dentry *dchild)
 971
 972 {
 973         int err;
 974         ENTRY;
 975
 976         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 977                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 978
 979         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~cfs_curproc_umask()) | S_IFDIR;
 980         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
 981
 982         RETURN(err);
 983 }
 984
 985 /* Try to find the child dentry by its name.
 986    If found, put the result fid into @fid. */
 987 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
 988                              struct lu_fid *fid)
 989 {
 990         struct dentry *parent, *child;
 991
 992         parent = list_entry(dir->i_dentry.next, struct dentry, d_alias);
 993         child = d_lookup(parent, name);
 994         if (child) {
 995                 if (child->d_inode)
 996                         *fid = *ll_inode2fid(child->d_inode);
 997                 dput(child);
 998         }
 999 }
1000
1001 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1002                             struct dentry *dchild, struct qstr *name)
1003 {
1004         struct ptlrpc_request *request = NULL;
1005         struct md_op_data *op_data;
1006         int rc;
1007         ENTRY;
1008
1009         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1010                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1011
1012         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1013                 RETURN(-EBUSY);
1014
1015         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1016                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1017         if (IS_ERR(op_data))
1018                 RETURN(PTR_ERR(op_data));
1019
1020         ll_get_child_fid(dir, name, &op_data->op_fid3);
1021         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1022         ll_finish_md_op_data(op_data);
1023         if (rc == 0)
1024                 ll_update_times(request, dir);
1025         ptlrpc_req_finished(request);
1026         RETURN(rc);
1027 }
1028
1029 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1030 {
1031         struct mdt_body *body;
1032         struct lov_mds_md *eadata;
1033         struct lov_stripe_md *lsm = NULL;
1034         struct obd_trans_info oti = { 0 };
1035         struct obdo *oa;
1036         struct obd_capa *oc = NULL;
1037         int rc;
1038         ENTRY;
1039
1040         /* req is swabbed so this is safe */
1041         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1042         if (!(body->valid & OBD_MD_FLEASIZE))
1043                 RETURN(0);
1044
1045         if (body->eadatasize == 0) {
1046                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1047                 GOTO(out, rc = -EPROTO);
1048         }
1049
1050         /* The MDS sent back the EA because we unlinked the last reference
1051          * to this file. Use this EA to unlink the objects on the OST.
1052          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1053          * check it is complete and sensible. */
1054         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1055                                               body->eadatasize);
1056         LASSERT(eadata != NULL);
1057
1058         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1059         if (rc < 0) {
1060                 CERROR("obd_unpackmd: %d\n", rc);
1061                 GOTO(out, rc);
1062         }
1063         LASSERT(rc >= sizeof(*lsm));
1064
1065         OBDO_ALLOC(oa);
1066         if (oa == NULL)
1067                 GOTO(out_free_memmd, rc = -ENOMEM);
1068
1069         oa->o_id = lsm->lsm_object_id;
1070         oa->o_seq = lsm->lsm_object_seq;
1071         oa->o_mode = body->mode & S_IFMT;
1072         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1073
1074         if (body->valid & OBD_MD_FLCOOKIE) {
1075                 oa->o_valid |= OBD_MD_FLCOOKIE;
1076                 oti.oti_logcookies =
1077                         req_capsule_server_sized_get(&request->rq_pill,
1078                                                      &RMF_LOGCOOKIES,
1079                                                    sizeof(struct llog_cookie) *
1080                                                      lsm->lsm_stripe_count);
1081                 if (oti.oti_logcookies == NULL) {
1082                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1083                         body->valid &= ~OBD_MD_FLCOOKIE;
1084                 }
1085         }
1086
1087         if (body->valid & OBD_MD_FLOSSCAPA) {
1088                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1089                 if (rc)
1090                         GOTO(out_free_memmd, rc);
1091         }
1092
1093         rc = obd_destroy(ll_i2dtexp(dir), oa, lsm, &oti, ll_i2mdexp(dir), oc);
1094         capa_put(oc);
1095         OBDO_FREE(oa);
1096         if (rc)
1097                 CERROR("obd destroy objid "LPX64" error %d\n",
1098                        lsm->lsm_object_id, rc);
1099  out_free_memmd:
1100         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1101  out:
1102         return rc;
1103 }
1104
1105 /* ll_unlink_generic() doesn't update the inode with the new link count.
1106  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
1107  * is any lock existing. They will recycle dentries and inodes based upon locks
1108  * too. b=20433 */
1109 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1110                              struct dentry *dchild, struct qstr *name)
1111 {
1112         struct ptlrpc_request *request = NULL;
1113         struct md_op_data *op_data;
1114         int rc;
1115         ENTRY;
1116         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1117                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1118
1119         /*
1120          * XXX: unlink bind mountpoint maybe call to here,
1121          * just check it as vfs_unlink does.
1122          */
1123         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1124                 RETURN(-EBUSY);
1125
1126         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1127                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1128         if (IS_ERR(op_data))
1129                 RETURN(PTR_ERR(op_data));
1130
1131         ll_get_child_fid(dir, name, &op_data->op_fid3);
1132         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1133         ll_finish_md_op_data(op_data);
1134         if (rc)
1135                 GOTO(out, rc);
1136
1137         ll_update_times(request, dir);
1138
1139         rc = ll_objects_destroy(request, dir);
1140  out:
1141         ptlrpc_req_finished(request);
1142         RETURN(rc);
1143 }
1144
1145 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1146                              struct dentry *src_dchild, struct qstr *src_name,
1147                              struct inode *tgt, struct dentry *tgt_dparent,
1148                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1149 {
1150         struct ptlrpc_request *request = NULL;
1151         struct ll_sb_info *sbi = ll_i2sbi(src);
1152         struct md_op_data *op_data;
1153         int err;
1154         ENTRY;
1155         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1156                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1157                src->i_ino, src->i_generation, src, tgt_name->len,
1158                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1159
1160         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1161             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1162                 RETURN(-EBUSY);
1163
1164         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1165                                      LUSTRE_OPC_ANY, NULL);
1166         if (IS_ERR(op_data))
1167                 RETURN(PTR_ERR(op_data));
1168
1169         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1170         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1171         err = md_rename(sbi->ll_md_exp, op_data,
1172                         src_name->name, src_name->len,
1173                         tgt_name->name, tgt_name->len, &request);
1174         ll_finish_md_op_data(op_data);
1175         if (!err) {
1176                 ll_update_times(request, src);
1177                 ll_update_times(request, tgt);
1178                 err = ll_objects_destroy(request, src);
1179         }
1180
1181         ptlrpc_req_finished(request);
1182
1183         RETURN(err);
1184 }
1185
1186 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1187                     ll_dev_t rdev)
1188 {
1189         return ll_mknod_generic(dir, &dchild->d_name, mode,
1190                                 old_encode_dev(rdev), dchild);
1191 }
1192
1193 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1194 {
1195         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1196 }
1197 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1198 {
1199         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1200 }
1201 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1202 {
1203         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1204 }
1205 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1206                       const char *oldname)
1207 {
1208         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1209 }
1210 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1211                    struct dentry *new_dentry)
1212 {
1213         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1214                                new_dentry);
1215 }
1216 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1217                      struct inode *new_dir, struct dentry *new_dentry)
1218 {
1219         int err;
1220         err = ll_rename_generic(old_dir, NULL,
1221                                  old_dentry, &old_dentry->d_name,
1222                                  new_dir, NULL, new_dentry,
1223                                  &new_dentry->d_name);
1224         if (!err) {
1225 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
1226                 if (!S_ISDIR(old_dentry->d_inode->i_mode))
1227 #endif
1228                         d_move(old_dentry, new_dentry);
1229         }
1230         return err;
1231 }
1232
1233 struct inode_operations ll_dir_inode_operations = {
1234         .mknod              = ll_mknod,
1235         .lookup             = ll_lookup_nd,
1236         .create             = ll_create_nd,
1237         /* We need all these non-raw things for NFSD, to not patch it. */
1238         .unlink             = ll_unlink,
1239         .mkdir              = ll_mkdir,
1240         .rmdir              = ll_rmdir,
1241         .symlink            = ll_symlink,
1242         .link               = ll_link,
1243         .rename             = ll_rename,
1244         .setattr            = ll_setattr,
1245         .getattr            = ll_getattr,
1246         .permission         = ll_inode_permission,
1247         .setxattr           = ll_setxattr,
1248         .getxattr           = ll_getxattr,
1249         .listxattr          = ll_listxattr,
1250         .removexattr        = ll_removexattr,
1251 };
1252
1253 struct inode_operations ll_special_inode_operations = {
1254         .setattr        = ll_setattr,
1255         .getattr        = ll_getattr,
1256         .permission     = ll_inode_permission,
1257         .setxattr       = ll_setxattr,
1258         .getxattr       = ll_getxattr,
1259         .listxattr      = ll_listxattr,
1260         .removexattr    = ll_removexattr,
1261 };