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 static 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                 lock_dentry(dentry);
 389                 __d_drop(dentry);
 390                 unlock_dentry(dentry);
 391                 ll_dops_init(dentry, 0, 1);
 392                 d_rehash_cond(dentry, 0); /* avoid taking dcache_lock inside */
 393                 spin_unlock(&dcache_lock);
 394                 cfs_spin_unlock(&ll_lookup_lock);
 395                 iput(inode);
 396                 CDEBUG(D_DENTRY, "alias dentry %.*s (%p) parent %p inode %p "
 397                        "refc %d\n", de->d_name.len, de->d_name.name, de,
 398                        de->d_parent, de->d_inode, atomic_read(&de->d_count));
 399                 return dentry;
 400         }
 401
 402         if (last_discon) {
 403                 CDEBUG(D_DENTRY, "Reuse disconnected dentry %p inode %p "
 404                         "refc %d\n", last_discon, last_discon->d_inode,
 405                         atomic_read(&last_discon->d_count));
 406                 dget_locked(last_discon);
 407                 lock_dentry(last_discon);
 408                 last_discon->d_flags |= DCACHE_LUSTRE_INVALID;
 409                 unlock_dentry(last_discon);
 410                 spin_unlock(&dcache_lock);
 411                 cfs_spin_unlock(&ll_lookup_lock);
 412                 ll_dops_init(last_discon, 1, 1);
 413                 d_rehash(de);
 414                 d_move(last_discon, de);
 415                 iput(inode);
 416                 return last_discon;
 417         }
 418         lock_dentry(de);
 419         de->d_flags |= DCACHE_LUSTRE_INVALID;
 420         unlock_dentry(de);
 421         ll_d_add(de, inode);
 422
 423         spin_unlock(&dcache_lock);
 424         cfs_spin_unlock(&ll_lookup_lock);
 425
 426         return de;
 427 }
 428
 429 int ll_lookup_it_finish(struct ptlrpc_request *request,
 430                         struct lookup_intent *it, void *data)
 431 {
 432         struct it_cb_data *icbd = data;
 433         struct dentry **de = icbd->icbd_childp;
 434         struct inode *parent = icbd->icbd_parent;
 435         struct inode *inode = NULL;
 436         int rc;
 437         ENTRY;
 438
 439         /* NB 1 request reference will be taken away by ll_intent_lock()
 440          * when I return */
 441         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 442                 struct dentry *save = *de;
 443                 __u64 bits = 0;
 444
 445                 rc = ll_prep_inode(&inode, request, (*de)->d_sb);
 446                 if (rc)
 447                         RETURN(rc);
 448
 449                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
 450
 451                 /* We used to query real size from OSTs here, but actually
 452                    this is not needed. For stat() calls size would be updated
 453                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 454                    2.4 and
 455                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 456                    Everybody else who needs correct file size would call
 457                    cl_glimpse_size or some equivalent themselves anyway.
 458                    Also see bug 7198. */
 459                 ll_dops_init(*de, 1, 1);
 460                 *de = ll_find_alias(inode, *de);
 461                 if (*de != save) {
 462                         struct ll_dentry_data *lld = ll_d2d(*de);
 463
 464                         /* just make sure the ll_dentry_data is ready */
 465                         if (unlikely(lld == NULL))
 466                                 ll_dops_init(*de, 1, 1);
 467                 }
 468                 /* we have lookup look - unhide dentry */
 469                 if ((*de)->d_flags & DCACHE_LUSTRE_INVALID &&
 470                     bits & MDS_INODELOCK_LOOKUP) {
 471                         lock_dentry(*de);
 472                         (*de)->d_flags &= ~DCACHE_LUSTRE_INVALID;
 473                         unlock_dentry(*de);
 474                 }
 475         } else {
 476                 __u64 ibits;
 477
 478                 ll_dops_init(*de, 1, 1);
 479                 /* Check that parent has UPDATE lock. If there is none, we
 480                    cannot afford to hash this dentry (done by ll_d_add) as it
 481                    might get picked up later when UPDATE lock will appear */
 482                 ibits = MDS_INODELOCK_UPDATE;
 483                 if (ll_have_md_lock(parent, &ibits, LCK_MINMODE)) {
 484                         spin_lock(&dcache_lock);
 485                         ll_d_add(*de, NULL);
 486                         spin_unlock(&dcache_lock);
 487                 } else {
 488                         /* negative lookup - and don't have update lock to
 489                          * parent */
 490                         lock_dentry(*de);
 491                         (*de)->d_flags |= DCACHE_LUSTRE_INVALID;
 492                         unlock_dentry(*de);
 493
 494                         (*de)->d_inode = NULL;
 495                         /* We do not want to hash the dentry if don`t have a
 496                          * lock, but if this dentry is later used in d_move,
 497                          * we'd hit uninitialised list head d_hash, so we just
 498                          * do this to init d_hash field but leave dentry
 499                          * unhashed. (bug 10796). */
 500                         d_rehash(*de);
 501                         d_drop(*de);
 502                 }
 503         }
 504
 505         RETURN(0);
 506 }
 507
 508 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 509                                    struct lookup_intent *it, int lookup_flags)
 510 {
 511         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 512         struct dentry *save = dentry, *retval;
 513         struct ptlrpc_request *req = NULL;
 514         struct md_op_data *op_data;
 515         struct it_cb_data icbd;
 516         __u32 opc;
 517         int rc, first = 0;
 518         ENTRY;
 519
 520         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 521                 RETURN(ERR_PTR(-ENAMETOOLONG));
 522
 523         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 524                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 525                parent->i_generation, parent, LL_IT2STR(it));
 526
 527         if (d_mountpoint(dentry))
 528                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 529
 530         ll_frob_intent(&it, &lookup_it);
 531
 532         /* As do_lookup is called before follow_mount, root dentry may be left
 533          * not valid, revalidate it here. */
 534         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 535             (it->it_op & (IT_OPEN | IT_CREAT))) {
 536                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it,
 537                                             MDS_INODELOCK_LOOKUP);
 538                 if (rc)
 539                         RETURN(ERR_PTR(rc));
 540         }
 541
 542         if (it->it_op == IT_GETATTR) {
 543                 first = ll_statahead_enter(parent, &dentry, 1);
 544                 if (first >= 0) {
 545                         ll_statahead_exit(parent, dentry, first);
 546                         if (first == 1)
 547                                 RETURN(retval = dentry);
 548                 }
 549         }
 550
 551         icbd.icbd_childp = &dentry;
 552         icbd.icbd_parent = parent;
 553
 554         if (it->it_op & IT_CREAT ||
 555             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 556                 opc = LUSTRE_OPC_CREATE;
 557         else
 558                 opc = LUSTRE_OPC_ANY;
 559
 560         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 561                                      dentry->d_name.len, lookup_flags, opc,
 562                                      NULL);
 563         if (IS_ERR(op_data))
 564                 RETURN((void *)op_data);
 565
 566         it->it_create_mode &= ~cfs_curproc_umask();
 567
 568         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 569                             lookup_flags, &req, ll_md_blocking_ast, 0);
 570         ll_finish_md_op_data(op_data);
 571         if (rc < 0)
 572                 GOTO(out, retval = ERR_PTR(rc));
 573
 574         rc = ll_lookup_it_finish(req, it, &icbd);
 575         if (rc != 0) {
 576                 ll_intent_release(it);
 577                 GOTO(out, retval = ERR_PTR(rc));
 578         }
 579
 580         if (first == -EEXIST)
 581                 ll_statahead_mark(parent, dentry);
 582
 583         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 584             !S_ISREG(dentry->d_inode->i_mode) &&
 585             !S_ISDIR(dentry->d_inode->i_mode)) {
 586                 ll_release_openhandle(dentry, it);
 587         }
 588         ll_lookup_finish_locks(it, dentry);
 589
 590         if (dentry == save)
 591                 GOTO(out, retval = NULL);
 592         else
 593                 GOTO(out, retval = dentry);
 594  out:
 595         if (req)
 596                 ptlrpc_req_finished(req);
 597         return retval;
 598 }
 599
 600 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 601                                         int lookup_flags)
 602 {
 603         struct lookup_intent *it;
 604
 605         OBD_ALLOC(it, sizeof(*it));
 606         if (!it)
 607                 return ERR_PTR(-ENOMEM);
 608
 609         if (lookup_flags & LOOKUP_OPEN) {
 610                 it->it_op = IT_OPEN;
 611                 if (lookup_flags & LOOKUP_CREATE)
 612                         it->it_op |= IT_CREAT;
 613                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
 614                 it->it_flags = oit->flags;
 615         } else {
 616                 it->it_op = IT_GETATTR;
 617         }
 618
 619 #ifndef HAVE_FILE_IN_STRUCT_INTENT
 620                 /* Since there is no way to pass our intent to ll_file_open,
 621                  * just check the file is there. Actual open will be done
 622                  * in ll_file_open */
 623                 if (it->it_op & IT_OPEN)
 624                         it->it_op = IT_LOOKUP;
 625 #endif
 626
 627         return it;
 628 }
 629
 630 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 631                                    struct nameidata *nd)
 632 {
 633         struct dentry *de;
 634         ENTRY;
 635
 636         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 637                 struct lookup_intent *it;
 638
 639 #if defined(HAVE_FILE_IN_STRUCT_INTENT) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 640                 /* Did we came here from failed revalidate just to propagate
 641                  * its error? */
 642                 if (nd->flags & LOOKUP_OPEN)
 643                         if (IS_ERR(nd->intent.open.file))
 644                                 RETURN((struct dentry *)nd->intent.open.file);
 645 #endif
 646                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 647                         it = ll_d2d(dentry)->lld_it;
 648                         ll_d2d(dentry)->lld_it = NULL;
 649                 } else {
 650                         if ((nd->flags & LOOKUP_CREATE ) && !(nd->flags & LOOKUP_OPEN)) {
 651                                 /* We are sure this is new dentry, so we need to create
 652                                    our private data and set the dentry ops */
 653                                 ll_dops_init(dentry, 1, 1);
 654                                 RETURN(NULL);
 655                         }
 656                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 657                         if (IS_ERR(it))
 658                                 RETURN((struct dentry *)it);
 659                 }
 660
 661                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 662                 if (de)
 663                         dentry = de;
 664                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 665                         if (dentry->d_inode &&
 666                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 667 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 668                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 669                                         // We cannot call open here as it would
 670                                         // deadlock.
 671                                         ptlrpc_req_finished(
 672                                                        (struct ptlrpc_request *)
 673                                                           it->d.lustre.it_data);
 674                                 } else {
 675 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 676 /* 2.6.1[456] have a bug in open_namei() that forgets to check
 677  * nd->intent.open.file for error, so we need to return it as lookup's result
 678  * instead */
 679                                         struct file *filp;
 680                                         nd->intent.open.file->private_data = it;
 681                                         filp =lookup_instantiate_filp(nd,dentry,
 682                                                                       NULL);
 683                                         if (IS_ERR(filp)) {
 684                                                 if (de)
 685                                                         dput(de);
 686                                                 de = (struct dentry *) filp;
 687                                         }
 688 #else
 689                                         nd->intent.open.file->private_data = it;
 690                                         (void)lookup_instantiate_filp(nd,dentry,
 691                                                                       NULL);
 692 #endif
 693
 694                                 }
 695 #else /* HAVE_FILE_IN_STRUCT_INTENT */
 696                                 /* Release open handle as we have no way to
 697                                  * pass it to ll_file_open */
 698                                 ll_release_openhandle(dentry, it);
 699 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
 700                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 701                                 // XXX This can only reliably work on assumption
 702                                 // that there are NO hashed negative dentries.
 703                                 ll_d2d(dentry)->lld_it = it;
 704                                 it = NULL; /* Will be freed in ll_create_nd */
 705                                 /* We absolutely depend on ll_create_nd to be
 706                                  * called to not leak this intent and possible
 707                                  * data attached to it */
 708                         }
 709                 }
 710
 711                 if (it) {
 712                         ll_intent_release(it);
 713                         OBD_FREE(it, sizeof(*it));
 714                 }
 715         } else {
 716                 de = ll_lookup_it(parent, dentry, NULL, 0);
 717         }
 718
 719         RETURN(de);
 720 }
 721
 722 /* We depend on "mode" being set with the proper file type/umask by now */
 723 static struct inode *ll_create_node(struct inode *dir, const char *name,
 724                                     int namelen, const void *data, int datalen,
 725                                     int mode, __u64 extra,
 726                                     struct lookup_intent *it)
 727 {
 728         struct inode *inode = NULL;
 729         struct ptlrpc_request *request = NULL;
 730         struct ll_sb_info *sbi = ll_i2sbi(dir);
 731         int rc;
 732         ENTRY;
 733
 734         LASSERT(it && it->d.lustre.it_disposition);
 735
 736         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 737         request = it->d.lustre.it_data;
 738         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 739         rc = ll_prep_inode(&inode, request, dir->i_sb);
 740         if (rc)
 741                 GOTO(out, inode = ERR_PTR(rc));
 742
 743         LASSERT(list_empty(&inode->i_dentry));
 744
 745         /* We asked for a lock on the directory, but were granted a
 746          * lock on the inode.  Since we finally have an inode pointer,
 747          * stuff it in the lock. */
 748         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 749                inode, inode->i_ino, inode->i_generation);
 750         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
 751         EXIT;
 752  out:
 753         ptlrpc_req_finished(request);
 754         return inode;
 755 }
 756
 757 /*
 758  * By the time this is called, we already have created the directory cache
 759  * entry for the new file, but it is so far negative - it has no inode.
 760  *
 761  * We defer creating the OBD object(s) until open, to keep the intent and
 762  * non-intent code paths similar, and also because we do not have the MDS
 763  * inode number before calling ll_create_node() (which is needed for LOV),
 764  * so we would need to do yet another RPC to the MDS to store the LOV EA
 765  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 766  * lmm_size in datalen (the MDS still has code which will handle that).
 767  *
 768  * If the create succeeds, we fill in the inode information
 769  * with d_instantiate().
 770  */
 771 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 772                         struct lookup_intent *it)
 773 {
 774         struct inode *inode;
 775         int rc = 0;
 776         ENTRY;
 777
 778         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 779                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 780                dir->i_generation, dir, LL_IT2STR(it));
 781
 782         rc = it_open_error(DISP_OPEN_CREATE, it);
 783         if (rc)
 784                 RETURN(rc);
 785
 786         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 787                                NULL, 0, mode, 0, it);
 788         if (IS_ERR(inode))
 789                 RETURN(PTR_ERR(inode));
 790
 791         d_instantiate(dentry, inode);
 792         /* Negative dentry may be unhashed if parent does not have UPDATE lock,
 793          * but some callers, e.g. do_coredump, expect dentry to be hashed after
 794          * successful create. Hash it here. */
 795         spin_lock(&dcache_lock);
 796         if (d_unhashed(dentry))
 797                 d_rehash_cond(dentry, 0);
 798         spin_unlock(&dcache_lock);
 799         RETURN(0);
 800 }
 801
 802 static void ll_update_times(struct ptlrpc_request *request,
 803                             struct inode *inode)
 804 {
 805         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 806                                                        &RMF_MDT_BODY);
 807
 808         LASSERT(body);
 809         if (body->valid & OBD_MD_FLMTIME &&
 810             body->mtime > LTIME_S(inode->i_mtime)) {
 811                 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to "LPU64"\n",
 812                        inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
 813                 LTIME_S(inode->i_mtime) = body->mtime;
 814         }
 815         if (body->valid & OBD_MD_FLCTIME &&
 816             body->ctime > LTIME_S(inode->i_ctime))
 817                 LTIME_S(inode->i_ctime) = body->ctime;
 818 }
 819
 820 static int ll_new_node(struct inode *dir, struct qstr *name,
 821                        const char *tgt, int mode, int rdev,
 822                        struct dentry *dchild, __u32 opc)
 823 {
 824         struct ptlrpc_request *request = NULL;
 825         struct md_op_data *op_data;
 826         struct inode *inode = NULL;
 827         struct ll_sb_info *sbi = ll_i2sbi(dir);
 828         int tgt_len = 0;
 829         int err;
 830
 831         ENTRY;
 832         if (unlikely(tgt != NULL))
 833                 tgt_len = strlen(tgt) + 1;
 834
 835         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 836                                      name->len, 0, opc, NULL);
 837         if (IS_ERR(op_data))
 838                 GOTO(err_exit, err = PTR_ERR(op_data));
 839
 840         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 841                         cfs_curproc_fsuid(), cfs_curproc_fsgid(),
 842                         cfs_curproc_cap_pack(), rdev, &request);
 843         ll_finish_md_op_data(op_data);
 844         if (err)
 845                 GOTO(err_exit, err);
 846
 847         ll_update_times(request, dir);
 848
 849         if (dchild) {
 850                 err = ll_prep_inode(&inode, request, dchild->d_sb);
 851                 if (err)
 852                      GOTO(err_exit, err);
 853
 854                 d_drop(dchild);
 855                 d_instantiate(dchild, inode);
 856         }
 857         EXIT;
 858 err_exit:
 859         ptlrpc_req_finished(request);
 860
 861         return err;
 862 }
 863
 864 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 865                             unsigned rdev, struct dentry *dchild)
 866 {
 867         int err;
 868         ENTRY;
 869
 870         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 871                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 872                mode, rdev);
 873
 874         mode &= ~cfs_curproc_umask();
 875
 876         switch (mode & S_IFMT) {
 877         case 0:
 878                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 879         case S_IFREG:
 880         case S_IFCHR:
 881         case S_IFBLK:
 882         case S_IFIFO:
 883         case S_IFSOCK:
 884                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 885                                   LUSTRE_OPC_MKNOD);
 886                 break;
 887         case S_IFDIR:
 888                 err = -EPERM;
 889                 break;
 890         default:
 891                 err = -EINVAL;
 892         }
 893         RETURN(err);
 894 }
 895
 896 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 897                         int mode, struct nameidata *nd)
 898 {
 899         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 900         int rc;
 901
 902         if (!it)
 903                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 904
 905         ll_d2d(dentry)->lld_it = NULL;
 906
 907         /* Was there an error? Propagate it! */
 908         if (it->d.lustre.it_status) {
 909                 rc = it->d.lustre.it_status;
 910                 goto out;
 911         }
 912
 913         rc = ll_create_it(dir, dentry, mode, it);
 914 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 915         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 916                 nd->intent.open.file->private_data = it;
 917                 lookup_instantiate_filp(nd, dentry, NULL);
 918         }
 919 #else
 920         ll_release_openhandle(dentry,it);
 921 #endif
 922
 923 out:
 924         ll_intent_release(it);
 925         OBD_FREE(it, sizeof(*it));
 926
 927         return rc;
 928 }
 929
 930 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 931                               const char *tgt, struct dentry *dchild)
 932 {
 933         int err;
 934         ENTRY;
 935
 936         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 937                name->len, name->name, dir->i_ino, dir->i_generation,
 938                dir, 3000, tgt);
 939
 940         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 941                           0, dchild, LUSTRE_OPC_SYMLINK);
 942         RETURN(err);
 943 }
 944
 945 static int ll_link_generic(struct inode *src,  struct inode *dir,
 946                            struct qstr *name, struct dentry *dchild)
 947 {
 948         struct ll_sb_info *sbi = ll_i2sbi(dir);
 949         struct ptlrpc_request *request = NULL;
 950         struct md_op_data *op_data;
 951         int err;
 952
 953         ENTRY;
 954         CDEBUG(D_VFSTRACE,
 955                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
 956                src->i_ino, src->i_generation, src, dir->i_ino,
 957                dir->i_generation, dir, name->len, name->name);
 958
 959         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
 960                                      0, LUSTRE_OPC_ANY, NULL);
 961         if (IS_ERR(op_data))
 962                 RETURN(PTR_ERR(op_data));
 963
 964         err = md_link(sbi->ll_md_exp, op_data, &request);
 965         ll_finish_md_op_data(op_data);
 966         if (err)
 967                 GOTO(out, err);
 968         if (dchild)
 969                 d_drop(dchild);
 970
 971         ll_update_times(request, dir);
 972         EXIT;
 973 out:
 974         ptlrpc_req_finished(request);
 975         RETURN(err);
 976 }
 977
 978 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
 979                             int mode, struct dentry *dchild)
 980
 981 {
 982         int err;
 983         ENTRY;
 984
 985         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 986                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 987
 988         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~cfs_curproc_umask()) | S_IFDIR;
 989         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
 990
 991         RETURN(err);
 992 }
 993
 994 /* Try to find the child dentry by its name.
 995    If found, put the result fid into @fid. */
 996 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
 997                              struct lu_fid *fid)
 998 {
 999         struct dentry *parent, *child;
1000
1001         parent = list_entry(dir->i_dentry.next, struct dentry, d_alias);
1002         child = d_lookup(parent, name);
1003         if (child) {
1004                 if (child->d_inode)
1005                         *fid = *ll_inode2fid(child->d_inode);
1006                 dput(child);
1007         }
1008 }
1009
1010 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1011                             struct dentry *dchild, struct qstr *name)
1012 {
1013         struct ptlrpc_request *request = NULL;
1014         struct md_op_data *op_data;
1015         int rc;
1016         ENTRY;
1017
1018         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1019                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1020
1021         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1022                 RETURN(-EBUSY);
1023
1024         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1025                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1026         if (IS_ERR(op_data))
1027                 RETURN(PTR_ERR(op_data));
1028
1029         ll_get_child_fid(dir, name, &op_data->op_fid3);
1030         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1031         ll_finish_md_op_data(op_data);
1032         if (rc == 0)
1033                 ll_update_times(request, dir);
1034         ptlrpc_req_finished(request);
1035         RETURN(rc);
1036 }
1037
1038 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1039 {
1040         struct mdt_body *body;
1041         struct lov_mds_md *eadata;
1042         struct lov_stripe_md *lsm = NULL;
1043         struct obd_trans_info oti = { 0 };
1044         struct obdo *oa;
1045         struct obd_capa *oc = NULL;
1046         int rc;
1047         ENTRY;
1048
1049         /* req is swabbed so this is safe */
1050         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1051         if (!(body->valid & OBD_MD_FLEASIZE))
1052                 RETURN(0);
1053
1054         if (body->eadatasize == 0) {
1055                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1056                 GOTO(out, rc = -EPROTO);
1057         }
1058
1059         /* The MDS sent back the EA because we unlinked the last reference
1060          * to this file. Use this EA to unlink the objects on the OST.
1061          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1062          * check it is complete and sensible. */
1063         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1064                                               body->eadatasize);
1065         LASSERT(eadata != NULL);
1066
1067         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1068         if (rc < 0) {
1069                 CERROR("obd_unpackmd: %d\n", rc);
1070                 GOTO(out, rc);
1071         }
1072         LASSERT(rc >= sizeof(*lsm));
1073
1074         OBDO_ALLOC(oa);
1075         if (oa == NULL)
1076                 GOTO(out_free_memmd, rc = -ENOMEM);
1077
1078         oa->o_id = lsm->lsm_object_id;
1079         oa->o_seq = lsm->lsm_object_seq;
1080         oa->o_mode = body->mode & S_IFMT;
1081         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1082
1083         if (body->valid & OBD_MD_FLCOOKIE) {
1084                 oa->o_valid |= OBD_MD_FLCOOKIE;
1085                 oti.oti_logcookies =
1086                         req_capsule_server_sized_get(&request->rq_pill,
1087                                                      &RMF_LOGCOOKIES,
1088                                                    sizeof(struct llog_cookie) *
1089                                                      lsm->lsm_stripe_count);
1090                 if (oti.oti_logcookies == NULL) {
1091                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1092                         body->valid &= ~OBD_MD_FLCOOKIE;
1093                 }
1094         }
1095
1096         if (body->valid & OBD_MD_FLOSSCAPA) {
1097                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1098                 if (rc)
1099                         GOTO(out_free_memmd, rc);
1100         }
1101
1102         rc = obd_destroy(ll_i2dtexp(dir), oa, lsm, &oti, ll_i2mdexp(dir), oc);
1103         capa_put(oc);
1104         OBDO_FREE(oa);
1105         if (rc)
1106                 CERROR("obd destroy objid "LPX64" error %d\n",
1107                        lsm->lsm_object_id, rc);
1108  out_free_memmd:
1109         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1110  out:
1111         return rc;
1112 }
1113
1114 /* ll_unlink_generic() doesn't update the inode with the new link count.
1115  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
1116  * is any lock existing. They will recycle dentries and inodes based upon locks
1117  * too. b=20433 */
1118 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1119                              struct dentry *dchild, struct qstr *name)
1120 {
1121         struct ptlrpc_request *request = NULL;
1122         struct md_op_data *op_data;
1123         int rc;
1124         ENTRY;
1125         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1126                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1127
1128         /*
1129          * XXX: unlink bind mountpoint maybe call to here,
1130          * just check it as vfs_unlink does.
1131          */
1132         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1133                 RETURN(-EBUSY);
1134
1135         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1136                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1137         if (IS_ERR(op_data))
1138                 RETURN(PTR_ERR(op_data));
1139
1140         ll_get_child_fid(dir, name, &op_data->op_fid3);
1141         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1142         ll_finish_md_op_data(op_data);
1143         if (rc)
1144                 GOTO(out, rc);
1145
1146         ll_update_times(request, dir);
1147
1148         rc = ll_objects_destroy(request, dir);
1149  out:
1150         ptlrpc_req_finished(request);
1151         RETURN(rc);
1152 }
1153
1154 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1155                              struct dentry *src_dchild, struct qstr *src_name,
1156                              struct inode *tgt, struct dentry *tgt_dparent,
1157                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1158 {
1159         struct ptlrpc_request *request = NULL;
1160         struct ll_sb_info *sbi = ll_i2sbi(src);
1161         struct md_op_data *op_data;
1162         int err;
1163         ENTRY;
1164         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1165                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1166                src->i_ino, src->i_generation, src, tgt_name->len,
1167                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1168
1169         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1170             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1171                 RETURN(-EBUSY);
1172
1173         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1174                                      LUSTRE_OPC_ANY, NULL);
1175         if (IS_ERR(op_data))
1176                 RETURN(PTR_ERR(op_data));
1177
1178         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1179         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1180         err = md_rename(sbi->ll_md_exp, op_data,
1181                         src_name->name, src_name->len,
1182                         tgt_name->name, tgt_name->len, &request);
1183         ll_finish_md_op_data(op_data);
1184         if (!err) {
1185                 ll_update_times(request, src);
1186                 ll_update_times(request, tgt);
1187                 err = ll_objects_destroy(request, src);
1188         }
1189
1190         ptlrpc_req_finished(request);
1191
1192         RETURN(err);
1193 }
1194
1195 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1196                     ll_dev_t rdev)
1197 {
1198         return ll_mknod_generic(dir, &dchild->d_name, mode,
1199                                 old_encode_dev(rdev), dchild);
1200 }
1201
1202 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1203 {
1204         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1205 }
1206 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1207 {
1208         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1209 }
1210 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1211 {
1212         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1213 }
1214 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1215                       const char *oldname)
1216 {
1217         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1218 }
1219 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1220                    struct dentry *new_dentry)
1221 {
1222         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1223                                new_dentry);
1224 }
1225 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1226                      struct inode *new_dir, struct dentry *new_dentry)
1227 {
1228         int err;
1229         err = ll_rename_generic(old_dir, NULL,
1230                                  old_dentry, &old_dentry->d_name,
1231                                  new_dir, NULL, new_dentry,
1232                                  &new_dentry->d_name);
1233         if (!err) {
1234 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
1235                 if (!S_ISDIR(old_dentry->d_inode->i_mode))
1236 #endif
1237                         d_move(old_dentry, new_dentry);
1238         }
1239         return err;
1240 }
1241
1242 struct inode_operations ll_dir_inode_operations = {
1243         .mknod              = ll_mknod,
1244         .lookup             = ll_lookup_nd,
1245         .create             = ll_create_nd,
1246         /* We need all these non-raw things for NFSD, to not patch it. */
1247         .unlink             = ll_unlink,
1248         .mkdir              = ll_mkdir,
1249         .rmdir              = ll_rmdir,
1250         .symlink            = ll_symlink,
1251         .link               = ll_link,
1252         .rename             = ll_rename,
1253         .setattr            = ll_setattr,
1254         .getattr            = ll_getattr,
1255         .permission         = ll_inode_permission,
1256         .setxattr           = ll_setxattr,
1257         .getxattr           = ll_getxattr,
1258         .listxattr          = ll_listxattr,
1259         .removexattr        = ll_removexattr,
1260 };
1261
1262 struct inode_operations ll_special_inode_operations = {
1263         .setattr        = ll_setattr,
1264         .getattr        = ll_getattr,
1265         .permission     = ll_inode_permission,
1266         .setxattr       = ll_setxattr,
1267         .getxattr       = ll_getxattr,
1268         .listxattr      = ll_listxattr,
1269         .removexattr    = ll_removexattr,
1270 };