lustre/llite/namei.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #include <linux/fs.h>
  38 #include <linux/sched.h>
  39 #include <linux/mm.h>
  40 #include <linux/smp_lock.h>
  41 #include <linux/quotaops.h>
  42 #include <linux/highmem.h>
  43 #include <linux/pagemap.h>
  44 #include <linux/security.h>
  45
  46 #define DEBUG_SUBSYSTEM S_LLITE
  47
  48 #include <obd_support.h>
  49 #include <lustre_fid.h>
  50 #include <lustre_lite.h>
  51 #include <lustre_dlm.h>
  52 #include <lustre_ver.h>
  53 #include "llite_internal.h"
  54
  55 /*
  56  * Check if we have something mounted at the named dchild.
  57  * In such a case there would always be dentry present.
  58  */
  59 static int ll_d_mountpoint(struct dentry *dparent, struct dentry *dchild,
  60                            struct qstr *name)
  61 {
  62         int mounted = 0;
  63
  64         if (unlikely(dchild)) {
  65                 mounted = d_mountpoint(dchild);
  66         } else if (dparent) {
  67                 dchild = d_lookup(dparent, name);
  68                 if (dchild) {
  69                         mounted = d_mountpoint(dchild);
  70                         dput(dchild);
  71                 }
  72         }
  73         return mounted;
  74 }
  75
  76 int ll_unlock(__u32 mode, struct lustre_handle *lockh)
  77 {
  78         ENTRY;
  79
  80         ldlm_lock_decref(lockh, mode);
  81
  82         RETURN(0);
  83 }
  84
  85
  86 /* called from iget5_locked->find_inode() under inode_lock spinlock */
  87 static int ll_test_inode(struct inode *inode, void *opaque)
  88 {
  89         struct ll_inode_info *lli = ll_i2info(inode);
  90         struct lustre_md     *md = opaque;
  91
  92         if (unlikely(!(md->body->valid & OBD_MD_FLID))) {
  93                 CERROR("MDS body missing FID\n");
  94                 return 0;
  95         }
  96
  97         if (!lu_fid_eq(&lli->lli_fid, &md->body->fid1))
  98                 return 0;
  99
 100         return 1;
 101 }
 102
 103 static int ll_set_inode(struct inode *inode, void *opaque)
 104 {
 105         struct ll_inode_info *lli = ll_i2info(inode);
 106         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
 107
 108         if (unlikely(!(body->valid & OBD_MD_FLID))) {
 109                 CERROR("MDS body missing FID\n");
 110                 return -EINVAL;
 111         }
 112
 113         lli->lli_fid = body->fid1;
 114         if (unlikely(!(body->valid & OBD_MD_FLTYPE))) {
 115                 CERROR("Can not initialize inode "DFID" without object type: "
 116                        "valid = "LPX64"\n", PFID(&lli->lli_fid), body->valid);
 117                 return -EINVAL;
 118         }
 119
 120         inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mode & S_IFMT);
 121         if (unlikely(inode->i_mode == 0)) {
 122                 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
 123                 return -EINVAL;
 124         }
 125
 126         ll_lli_init(lli);
 127
 128         return 0;
 129 }
 130
 131
 132 /*
 133  * Get an inode by inode number (already instantiated by the intent lookup).
 134  * Returns inode or NULL
 135  */
 136 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 137                       struct lustre_md *md)
 138 {
 139         struct inode         *inode;
 140         ENTRY;
 141
 142         LASSERT(hash != 0);
 143         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
 144
 145         if (inode) {
 146                 if (inode->i_state & I_NEW) {
 147                         int rc = 0;
 148
 149                         ll_read_inode2(inode, md);
 150                         if (S_ISREG(inode->i_mode) &&
 151                             ll_i2info(inode)->lli_clob == NULL)
 152                                 rc = cl_file_inode_init(inode, md);
 153                         if (rc != 0) {
 154                                 md->lsm = NULL;
 155                                 make_bad_inode(inode);
 156                                 unlock_new_inode(inode);
 157                                 iput(inode);
 158                                 inode = ERR_PTR(rc);
 159                         } else
 160                                 unlock_new_inode(inode);
 161                 } else if (!(inode->i_state & (I_FREEING | I_CLEAR)))
 162                         ll_update_inode(inode, md);
 163                 CDEBUG(D_VFSTRACE, "got inode: %p for "DFID"\n",
 164                        inode, PFID(&md->body->fid1));
 165         }
 166         RETURN(inode);
 167 }
 168
 169 static void ll_drop_negative_dentry(struct inode *dir)
 170 {
 171         struct dentry *dentry, *tmp_alias, *tmp_subdir;
 172
 173         cfs_spin_lock(&ll_lookup_lock);
 174         spin_lock(&dcache_lock);
 175 restart:
 176         list_for_each_entry_safe(dentry, tmp_alias,
 177                                  &dir->i_dentry,d_alias) {
 178                 if (!list_empty(&dentry->d_subdirs)) {
 179                         struct dentry *child;
 180                         list_for_each_entry_safe(child, tmp_subdir,
 181                                                  &dentry->d_subdirs,
 182                                                  d_child) {
 183                                 /* XXX Print some debug here? */
 184                                 if (!child->d_inode)
 185                                 /* Negative dentry. If we were
 186                                    dropping dcache lock, go
 187                                    throught the list again */
 188                                         if (ll_drop_dentry(child))
 189                                                 goto restart;
 190                         }
 191                 }
 192         }
 193         spin_unlock(&dcache_lock);
 194         cfs_spin_unlock(&ll_lookup_lock);
 195 }
 196
 197
 198 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 199                        void *data, int flag)
 200 {
 201         int rc;
 202         struct lustre_handle lockh;
 203         ENTRY;
 204
 205         switch (flag) {
 206         case LDLM_CB_BLOCKING:
 207                 ldlm_lock2handle(lock, &lockh);
 208                 rc = ldlm_cli_cancel(&lockh);
 209                 if (rc < 0) {
 210                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 211                         RETURN(rc);
 212                 }
 213                 break;
 214         case LDLM_CB_CANCELING: {
 215                 struct inode *inode = ll_inode_from_lock(lock);
 216                 struct ll_inode_info *lli;
 217                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 218                 struct lu_fid *fid;
 219                 ldlm_mode_t mode = lock->l_req_mode;
 220
 221                 /* Invalidate all dentries associated with this inode */
 222                 if (inode == NULL)
 223                         break;
 224
 225                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
 226                 /* For OPEN locks we differentiate between lock modes - CR, CW. PR - bug 22891 */
 227                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE))
 228                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
 229
 230                 if (bits & MDS_INODELOCK_OPEN)
 231                         ll_have_md_lock(inode, &bits, mode);
 232
 233                 fid = ll_inode2fid(inode);
 234                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
 235                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
 236                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
 237                         LDLM_ERROR(lock, "data mismatch with object "
 238                                    DFID" (%p)", PFID(fid), inode);
 239                 }
 240
 241                 if (bits & MDS_INODELOCK_OPEN) {
 242                         int flags = 0;
 243                         switch (lock->l_req_mode) {
 244                         case LCK_CW:
 245                                 flags = FMODE_WRITE;
 246                                 break;
 247                         case LCK_PR:
 248                                 flags = FMODE_EXEC;
 249                                 break;
 250                         case LCK_CR:
 251                                 flags = FMODE_READ;
 252                                 break;
 253                         default:
 254                                 CERROR("Unexpected lock mode for OPEN lock "
 255                                        "%d, inode %ld\n", lock->l_req_mode,
 256                                        inode->i_ino);
 257                         }
 258                         ll_md_real_close(inode, flags);
 259                 }
 260
 261                 lli = ll_i2info(inode);
 262                 if (bits & MDS_INODELOCK_UPDATE)
 263                         lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 264
 265                 if (S_ISDIR(inode->i_mode) &&
 266                      (bits & MDS_INODELOCK_UPDATE)) {
 267                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 268                                inode->i_ino);
 269                         truncate_inode_pages(inode->i_mapping, 0);
 270                         ll_drop_negative_dentry(inode);
 271                 }
 272
 273                 if (inode->i_sb->s_root &&
 274                     inode != inode->i_sb->s_root->d_inode &&
 275                     (bits & MDS_INODELOCK_LOOKUP))
 276                         ll_unhash_aliases(inode);
 277                 iput(inode);
 278                 break;
 279         }
 280         default:
 281                 LBUG();
 282         }
 283
 284         RETURN(0);
 285 }
 286
 287 __u32 ll_i2suppgid(struct inode *i)
 288 {
 289         if (cfs_curproc_is_in_groups(i->i_gid))
 290                 return (__u32)i->i_gid;
 291         else
 292                 return (__u32)(-1);
 293 }
 294
 295 /* Pack the required supplementary groups into the supplied groups array.
 296  * If we don't need to use the groups from the target inode(s) then we
 297  * instead pack one or more groups from the user's supplementary group
 298  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 299 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 300 {
 301 #if 0
 302         int i;
 303 #endif
 304
 305         LASSERT(i1 != NULL);
 306         LASSERT(suppgids != NULL);
 307
 308         suppgids[0] = ll_i2suppgid(i1);
 309
 310         if (i2)
 311                 suppgids[1] = ll_i2suppgid(i2);
 312                 else
 313                         suppgids[1] = -1;
 314
 315 #if 0
 316         for (i = 0; i < current_ngroups; i++) {
 317                 if (suppgids[0] == -1) {
 318                         if (current_groups[i] != suppgids[1])
 319                                 suppgids[0] = current_groups[i];
 320                         continue;
 321                 }
 322                 if (suppgids[1] == -1) {
 323                         if (current_groups[i] != suppgids[0])
 324                                 suppgids[1] = current_groups[i];
 325                         continue;
 326                 }
 327                 break;
 328         }
 329 #endif
 330 }
 331
 332 static void ll_d_add(struct dentry *de, struct inode *inode)
 333 {
 334         CDEBUG(D_DENTRY, "adding inode %p to dentry %p\n", inode, de);
 335         /* d_instantiate */
 336         if (!list_empty(&de->d_alias)) {
 337                 spin_unlock(&dcache_lock);
 338                 CERROR("dentry %.*s %p alias next %p, prev %p\n",
 339                        de->d_name.len, de->d_name.name, de,
 340                        de->d_alias.next, de->d_alias.prev);
 341                 LBUG();
 342         }
 343         if (inode)
 344                 list_add(&de->d_alias, &inode->i_dentry);
 345         de->d_inode = inode;
 346         /* d_instantiate() replacement code should initialize security
 347          * context. */
 348         security_d_instantiate(de, inode);
 349
 350         /* d_rehash */
 351         if (!d_unhashed(de)) {
 352                 spin_unlock(&dcache_lock);
 353                 CERROR("dentry %.*s %p hash next %p\n",
 354                        de->d_name.len, de->d_name.name, de, de->d_hash.next);
 355                 LBUG();
 356         }
 357         d_rehash_cond(de, 0);
 358 }
 359
 360 /* Search "inode"'s alias list for a dentry that has the same name and parent
 361  * as de.  If found, return it.  If not found, return de.
 362  * Lustre can't use d_add_unique because don't unhash aliases for directory
 363  * in ll_revalidate_it.  After revaliadate inode will be have hashed aliases
 364  * and it triggers BUG_ON in d_instantiate_unique (bug #10954).
 365  */
 366 struct dentry *ll_find_alias(struct inode *inode, struct dentry *de)
 367 {
 368         struct list_head *tmp;
 369         struct dentry *dentry;
 370         struct dentry *last_discon = NULL;
 371
 372         cfs_spin_lock(&ll_lookup_lock);
 373         spin_lock(&dcache_lock);
 374         list_for_each(tmp, &inode->i_dentry) {
 375                 dentry = list_entry(tmp, struct dentry, d_alias);
 376
 377                 /* We are called here with 'de' already on the aliases list. */
 378                 if (unlikely(dentry == de)) {
 379                         CERROR("whoops\n");
 380                         continue;
 381                 }
 382
 383                 if (dentry->d_flags & DCACHE_DISCONNECTED) {
 384                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
 385                         last_discon = dentry;
 386                         continue;
 387                 }
 388
 389                 if (dentry->d_parent != de->d_parent)
 390                         continue;
 391
 392                 if (dentry->d_name.hash != de->d_name.hash)
 393                         continue;
 394
 395                 if (dentry->d_name.len != de->d_name.len)
 396                         continue;
 397
 398                 if (memcmp(dentry->d_name.name, de->d_name.name,
 399                            de->d_name.len) != 0)
 400                         continue;
 401
 402                 dget_locked(dentry);
 403                 ll_dops_init(dentry, 0, 1);
 404                 ll_dentry_rehash(dentry, 1);
 405                 spin_unlock(&dcache_lock);
 406                 cfs_spin_unlock(&ll_lookup_lock);
 407                 iput(inode);
 408                 CDEBUG(D_DENTRY, "alias dentry %.*s (%p) parent %p inode %p "
 409                        "refc %d\n", de->d_name.len, de->d_name.name, de,
 410                        de->d_parent, de->d_inode, atomic_read(&de->d_count));
 411                 return dentry;
 412         }
 413
 414         if (last_discon) {
 415                 CDEBUG(D_DENTRY, "Reuse disconnected dentry %p inode %p "
 416                         "refc %d\n", last_discon, last_discon->d_inode,
 417                         atomic_read(&last_discon->d_count));
 418                 dget_locked(last_discon);
 419                 lock_dentry(last_discon);
 420                 last_discon->d_flags |= DCACHE_LUSTRE_INVALID;
 421                 unlock_dentry(last_discon);
 422                 spin_unlock(&dcache_lock);
 423                 cfs_spin_unlock(&ll_lookup_lock);
 424                 ll_dops_init(last_discon, 1, 1);
 425                 d_rehash(de);
 426                 d_move(last_discon, de);
 427                 iput(inode);
 428                 return last_discon;
 429         }
 430         lock_dentry(de);
 431         de->d_flags |= DCACHE_LUSTRE_INVALID;
 432         unlock_dentry(de);
 433         ll_d_add(de, inode);
 434
 435         spin_unlock(&dcache_lock);
 436         cfs_spin_unlock(&ll_lookup_lock);
 437
 438         return de;
 439 }
 440
 441 int ll_lookup_it_finish(struct ptlrpc_request *request,
 442                         struct lookup_intent *it, void *data)
 443 {
 444         struct it_cb_data *icbd = data;
 445         struct dentry **de = icbd->icbd_childp;
 446         struct inode *parent = icbd->icbd_parent;
 447         struct inode *inode = NULL;
 448         int rc;
 449         ENTRY;
 450
 451         /* NB 1 request reference will be taken away by ll_intent_lock()
 452          * when I return */
 453         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 454                 struct dentry *save = *de;
 455                 __u64 bits = 0;
 456
 457                 rc = ll_prep_inode(&inode, request, (*de)->d_sb);
 458                 if (rc)
 459                         RETURN(rc);
 460
 461                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
 462
 463                 /* We used to query real size from OSTs here, but actually
 464                    this is not needed. For stat() calls size would be updated
 465                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 466                    2.4 and
 467                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 468                    Everybody else who needs correct file size would call
 469                    ll_glimpse_size or some equivalent themselves anyway.
 470                    Also see bug 7198. */
 471                 ll_dops_init(*de, 1, 1);
 472                 *de = ll_find_alias(inode, *de);
 473                 if (*de != save) {
 474                         struct ll_dentry_data *lld = ll_d2d(*de);
 475
 476                         /* just make sure the ll_dentry_data is ready */
 477                         if (unlikely(lld == NULL))
 478                                 ll_dops_init(*de, 1, 1);
 479                 }
 480                 /* we have lookup look - unhide dentry */
 481                 ll_dentry_reset_flags(*de, bits);
 482         } else {
 483                 __u64 ibits;
 484
 485                 ll_dops_init(*de, 1, 1);
 486                 /* Check that parent has UPDATE lock. If there is none, we
 487                    cannot afford to hash this dentry (done by ll_d_add) as it
 488                    might get picked up later when UPDATE lock will appear */
 489                 ibits = MDS_INODELOCK_UPDATE;
 490                 if (ll_have_md_lock(parent, &ibits, LCK_MINMODE)) {
 491                         spin_lock(&dcache_lock);
 492                         ll_d_add(*de, NULL);
 493                         spin_unlock(&dcache_lock);
 494                 } else {
 495                         /* negative lookup - and don't have update lock to
 496                          * parent */
 497                         lock_dentry(*de);
 498                         (*de)->d_flags |= DCACHE_LUSTRE_INVALID;
 499                         unlock_dentry(*de);
 500
 501                         (*de)->d_inode = NULL;
 502                         /* We do not want to hash the dentry if don`t have a
 503                          * lock, but if this dentry is later used in d_move,
 504                          * we'd hit uninitialised list head d_hash, so we just
 505                          * do this to init d_hash field but leave dentry
 506                          * unhashed. (bug 10796). */
 507                         d_rehash(*de);
 508                         d_drop(*de);
 509                 }
 510         }
 511
 512         RETURN(0);
 513 }
 514
 515 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 516                                    struct lookup_intent *it, int lookup_flags)
 517 {
 518         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 519         struct dentry *save = dentry, *retval;
 520         struct ptlrpc_request *req = NULL;
 521         struct md_op_data *op_data;
 522         struct it_cb_data icbd;
 523         __u32 opc;
 524         int rc;
 525         ENTRY;
 526
 527         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 528                 RETURN(ERR_PTR(-ENAMETOOLONG));
 529
 530         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 531                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 532                parent->i_generation, parent, LL_IT2STR(it));
 533
 534         if (d_mountpoint(dentry))
 535                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 536
 537         ll_frob_intent(&it, &lookup_it);
 538
 539         /* As do_lookup is called before follow_mount, root dentry may be left
 540          * not valid, revalidate it here. */
 541         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 542             (it->it_op & (IT_OPEN | IT_CREAT))) {
 543                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it,
 544                                             MDS_INODELOCK_LOOKUP);
 545                 if (rc)
 546                         RETURN(ERR_PTR(rc));
 547         }
 548
 549         if (it->it_op == IT_GETATTR) {
 550                 rc = ll_statahead_enter(parent, &dentry, 0);
 551                 if (rc == 1) {
 552                         if (dentry == save)
 553                                 GOTO(out, retval = NULL);
 554                         GOTO(out, retval = dentry);
 555                 }
 556         }
 557
 558         icbd.icbd_childp = &dentry;
 559         icbd.icbd_parent = parent;
 560
 561         if (it->it_op & IT_CREAT ||
 562             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 563                 opc = LUSTRE_OPC_CREATE;
 564         else
 565                 opc = LUSTRE_OPC_ANY;
 566
 567         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 568                                      dentry->d_name.len, lookup_flags, opc,
 569                                      NULL);
 570         if (IS_ERR(op_data))
 571                 RETURN((void *)op_data);
 572
 573         it->it_create_mode &= ~cfs_curproc_umask();
 574
 575         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 576                             lookup_flags, &req, ll_md_blocking_ast, 0);
 577         ll_finish_md_op_data(op_data);
 578         if (rc < 0)
 579                 GOTO(out, retval = ERR_PTR(rc));
 580
 581         rc = ll_lookup_it_finish(req, it, &icbd);
 582         if (rc != 0) {
 583                 ll_intent_release(it);
 584                 GOTO(out, retval = ERR_PTR(rc));
 585         }
 586
 587         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 588             !S_ISREG(dentry->d_inode->i_mode) &&
 589             !S_ISDIR(dentry->d_inode->i_mode)) {
 590                 ll_release_openhandle(dentry, it);
 591         }
 592         ll_lookup_finish_locks(it, dentry);
 593
 594         if (dentry == save)
 595                 GOTO(out, retval = NULL);
 596         else
 597                 GOTO(out, retval = dentry);
 598  out:
 599         if (req)
 600                 ptlrpc_req_finished(req);
 601         if (it->it_op == IT_GETATTR && (retval == NULL || retval == dentry))
 602                 ll_statahead_mark(parent, dentry);
 603         return retval;
 604 }
 605
 606 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 607                                         int lookup_flags)
 608 {
 609         struct lookup_intent *it;
 610
 611         OBD_ALLOC(it, sizeof(*it));
 612         if (!it)
 613                 return ERR_PTR(-ENOMEM);
 614
 615         if (lookup_flags & LOOKUP_OPEN) {
 616                 it->it_op = IT_OPEN;
 617                 if (lookup_flags & LOOKUP_CREATE)
 618                         it->it_op |= IT_CREAT;
 619                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
 620                 it->it_flags = oit->flags;
 621         } else {
 622                 it->it_op = IT_GETATTR;
 623         }
 624
 625         return it;
 626 }
 627
 628 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 629                                    struct nameidata *nd)
 630 {
 631         struct dentry *de;
 632         ENTRY;
 633
 634         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 635                 struct lookup_intent *it;
 636
 637 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
 638                 /* Did we came here from failed revalidate just to propagate
 639                  * its error? */
 640                 if (nd->flags & LOOKUP_OPEN)
 641                         if (IS_ERR(nd->intent.open.file))
 642                                 RETURN((struct dentry *)nd->intent.open.file);
 643 #endif
 644                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 645                         it = ll_d2d(dentry)->lld_it;
 646                         ll_d2d(dentry)->lld_it = NULL;
 647                 } else {
 648                         if ((nd->flags & LOOKUP_CREATE ) && !(nd->flags & LOOKUP_OPEN)) {
 649                                 /* We are sure this is new dentry, so we need to create
 650                                    our private data and set the dentry ops */
 651                                 ll_dops_init(dentry, 1, 1);
 652                                 RETURN(NULL);
 653                         }
 654                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 655                         if (IS_ERR(it))
 656                                 RETURN((struct dentry *)it);
 657                 }
 658
 659                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 660                 if (de)
 661                         dentry = de;
 662                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 663                         if (dentry->d_inode &&
 664                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 665                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 666                                         // We cannot call open here as it would
 667                                         // deadlock.
 668                                         ptlrpc_req_finished(
 669                                                        (struct ptlrpc_request *)
 670                                                           it->d.lustre.it_data);
 671                                 } else {
 672                                         struct file *filp;
 673
 674                                         nd->intent.open.file->private_data = it;
 675                                         filp = lookup_instantiate_filp(nd,
 676                                                                        dentry,
 677                                                                        NULL);
 678                                         if (IS_ERR(filp)) {
 679                                                 if (de)
 680                                                         dput(de);
 681                                                 de = (struct dentry *)filp;
 682                                         }
 683                                 }
 684                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 685                                 // XXX This can only reliably work on assumption
 686                                 // that there are NO hashed negative dentries.
 687                                 ll_d2d(dentry)->lld_it = it;
 688                                 it = NULL; /* Will be freed in ll_create_nd */
 689                                 /* We absolutely depend on ll_create_nd to be
 690                                  * called to not leak this intent and possible
 691                                  * data attached to it */
 692                         }
 693                 }
 694
 695                 if (it) {
 696                         ll_intent_release(it);
 697                         OBD_FREE(it, sizeof(*it));
 698                 }
 699         } else {
 700                 de = ll_lookup_it(parent, dentry, NULL, 0);
 701         }
 702
 703         RETURN(de);
 704 }
 705
 706 /* We depend on "mode" being set with the proper file type/umask by now */
 707 static struct inode *ll_create_node(struct inode *dir, const char *name,
 708                                     int namelen, const void *data, int datalen,
 709                                     int mode, __u64 extra,
 710                                     struct lookup_intent *it)
 711 {
 712         struct inode *inode = NULL;
 713         struct ptlrpc_request *request = NULL;
 714         struct ll_sb_info *sbi = ll_i2sbi(dir);
 715         int rc;
 716         ENTRY;
 717
 718         LASSERT(it && it->d.lustre.it_disposition);
 719
 720         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 721         request = it->d.lustre.it_data;
 722         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 723         rc = ll_prep_inode(&inode, request, dir->i_sb);
 724         if (rc)
 725                 GOTO(out, inode = ERR_PTR(rc));
 726
 727         LASSERT(list_empty(&inode->i_dentry));
 728
 729         /* We asked for a lock on the directory, but were granted a
 730          * lock on the inode.  Since we finally have an inode pointer,
 731          * stuff it in the lock. */
 732         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 733                inode, inode->i_ino, inode->i_generation);
 734         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
 735         EXIT;
 736  out:
 737         ptlrpc_req_finished(request);
 738         return inode;
 739 }
 740
 741 /*
 742  * By the time this is called, we already have created the directory cache
 743  * entry for the new file, but it is so far negative - it has no inode.
 744  *
 745  * We defer creating the OBD object(s) until open, to keep the intent and
 746  * non-intent code paths similar, and also because we do not have the MDS
 747  * inode number before calling ll_create_node() (which is needed for LOV),
 748  * so we would need to do yet another RPC to the MDS to store the LOV EA
 749  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 750  * lmm_size in datalen (the MDS still has code which will handle that).
 751  *
 752  * If the create succeeds, we fill in the inode information
 753  * with d_instantiate().
 754  */
 755 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 756                         struct lookup_intent *it)
 757 {
 758         struct inode *inode;
 759         int rc = 0;
 760         ENTRY;
 761
 762         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 763                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 764                dir->i_generation, dir, LL_IT2STR(it));
 765
 766         rc = it_open_error(DISP_OPEN_CREATE, it);
 767         if (rc)
 768                 RETURN(rc);
 769
 770         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 771                                NULL, 0, mode, 0, it);
 772         if (IS_ERR(inode))
 773                 RETURN(PTR_ERR(inode));
 774
 775         d_instantiate(dentry, inode);
 776         /* Negative dentry may be unhashed if parent does not have UPDATE lock,
 777          * but some callers, e.g. do_coredump, expect dentry to be hashed after
 778          * successful create. Hash it here. */
 779         spin_lock(&dcache_lock);
 780         if (d_unhashed(dentry))
 781                 d_rehash_cond(dentry, 0);
 782         spin_unlock(&dcache_lock);
 783         RETURN(0);
 784 }
 785
 786 static void ll_update_times(struct ptlrpc_request *request,
 787                             struct inode *inode)
 788 {
 789         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 790                                                        &RMF_MDT_BODY);
 791
 792         LASSERT(body);
 793         if (body->valid & OBD_MD_FLMTIME &&
 794             body->mtime > LTIME_S(inode->i_mtime)) {
 795                 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to "LPU64"\n",
 796                        inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
 797                 LTIME_S(inode->i_mtime) = body->mtime;
 798         }
 799         if (body->valid & OBD_MD_FLCTIME &&
 800             body->ctime > LTIME_S(inode->i_ctime))
 801                 LTIME_S(inode->i_ctime) = body->ctime;
 802 }
 803
 804 static int ll_new_node(struct inode *dir, struct qstr *name,
 805                        const char *tgt, int mode, int rdev,
 806                        struct dentry *dchild, __u32 opc)
 807 {
 808         struct ptlrpc_request *request = NULL;
 809         struct md_op_data *op_data;
 810         struct inode *inode = NULL;
 811         struct ll_sb_info *sbi = ll_i2sbi(dir);
 812         int tgt_len = 0;
 813         int err;
 814
 815         ENTRY;
 816         if (unlikely(tgt != NULL))
 817                 tgt_len = strlen(tgt) + 1;
 818
 819         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 820                                      name->len, 0, opc, NULL);
 821         if (IS_ERR(op_data))
 822                 GOTO(err_exit, err = PTR_ERR(op_data));
 823
 824         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 825                         cfs_curproc_fsuid(), cfs_curproc_fsgid(),
 826                         cfs_curproc_cap_pack(), rdev, &request);
 827         ll_finish_md_op_data(op_data);
 828         if (err)
 829                 GOTO(err_exit, err);
 830
 831         ll_update_times(request, dir);
 832
 833         if (dchild) {
 834                 err = ll_prep_inode(&inode, request, dchild->d_sb);
 835                 if (err)
 836                      GOTO(err_exit, err);
 837
 838                 d_drop(dchild);
 839                 d_instantiate(dchild, inode);
 840         }
 841         EXIT;
 842 err_exit:
 843         ptlrpc_req_finished(request);
 844
 845         return err;
 846 }
 847
 848 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 849                             unsigned rdev, struct dentry *dchild)
 850 {
 851         int err;
 852         ENTRY;
 853
 854         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 855                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 856                mode, rdev);
 857
 858         mode &= ~cfs_curproc_umask();
 859
 860         switch (mode & S_IFMT) {
 861         case 0:
 862                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 863         case S_IFREG:
 864         case S_IFCHR:
 865         case S_IFBLK:
 866         case S_IFIFO:
 867         case S_IFSOCK:
 868                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 869                                   LUSTRE_OPC_MKNOD);
 870                 break;
 871         case S_IFDIR:
 872                 err = -EPERM;
 873                 break;
 874         default:
 875                 err = -EINVAL;
 876         }
 877
 878         if (!err)
 879                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
 880
 881         RETURN(err);
 882 }
 883
 884 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 885                         int mode, struct nameidata *nd)
 886 {
 887         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 888         int rc;
 889
 890         if (!it)
 891                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 892
 893         ll_d2d(dentry)->lld_it = NULL;
 894
 895         /* Was there an error? Propagate it! */
 896         if (it->d.lustre.it_status) {
 897                 rc = it->d.lustre.it_status;
 898                 goto out;
 899         }
 900
 901         rc = ll_create_it(dir, dentry, mode, it);
 902         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 903                 struct file *filp;
 904
 905                 nd->intent.open.file->private_data = it;
 906                 filp = lookup_instantiate_filp(nd, dentry, NULL);
 907                 if (IS_ERR(filp))
 908                         rc = PTR_ERR(filp);
 909         }
 910
 911 out:
 912         ll_intent_release(it);
 913         OBD_FREE(it, sizeof(*it));
 914
 915         if (!rc)
 916                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
 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
 934         if (!err)
 935                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
 936
 937         RETURN(err);
 938 }
 939
 940 static int ll_link_generic(struct inode *src,  struct inode *dir,
 941                            struct qstr *name, struct dentry *dchild)
 942 {
 943         struct ll_sb_info *sbi = ll_i2sbi(dir);
 944         struct ptlrpc_request *request = NULL;
 945         struct md_op_data *op_data;
 946         int err;
 947
 948         ENTRY;
 949         CDEBUG(D_VFSTRACE,
 950                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
 951                src->i_ino, src->i_generation, src, dir->i_ino,
 952                dir->i_generation, dir, name->len, name->name);
 953
 954         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
 955                                      0, LUSTRE_OPC_ANY, NULL);
 956         if (IS_ERR(op_data))
 957                 RETURN(PTR_ERR(op_data));
 958
 959         err = md_link(sbi->ll_md_exp, op_data, &request);
 960         ll_finish_md_op_data(op_data);
 961         if (err)
 962                 GOTO(out, err);
 963         if (dchild)
 964                 d_drop(dchild);
 965
 966         ll_update_times(request, dir);
 967         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
 968         EXIT;
 969 out:
 970         ptlrpc_req_finished(request);
 971         RETURN(err);
 972 }
 973
 974 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
 975                             int mode, struct dentry *dchild)
 976
 977 {
 978         int err;
 979         ENTRY;
 980
 981         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 982                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 983
 984         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~cfs_curproc_umask()) | S_IFDIR;
 985         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
 986
 987         if (!err)
 988                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
 989
 990         RETURN(err);
 991 }
 992
 993 /* Try to find the child dentry by its name.
 994    If found, put the result fid into @fid. */
 995 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
 996                              struct lu_fid *fid)
 997 {
 998         struct dentry *parent, *child;
 999
1000         parent = list_entry(dir->i_dentry.next, struct dentry, d_alias);
1001         child = d_lookup(parent, name);
1002         if (child) {
1003                 if (child->d_inode)
1004                         *fid = *ll_inode2fid(child->d_inode);
1005                 dput(child);
1006         }
1007 }
1008
1009 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1010                             struct dentry *dchild, struct qstr *name)
1011 {
1012         struct ptlrpc_request *request = NULL;
1013         struct md_op_data *op_data;
1014         int rc;
1015         ENTRY;
1016
1017         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1018                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1019
1020         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1021                 RETURN(-EBUSY);
1022
1023         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1024                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1025         if (IS_ERR(op_data))
1026                 RETURN(PTR_ERR(op_data));
1027
1028         ll_get_child_fid(dir, name, &op_data->op_fid3);
1029         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1030         ll_finish_md_op_data(op_data);
1031         if (rc == 0) {
1032                 ll_update_times(request, dir);
1033                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1034         }
1035
1036         ptlrpc_req_finished(request);
1037         RETURN(rc);
1038 }
1039
1040 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1041 {
1042         struct mdt_body *body;
1043         struct lov_mds_md *eadata;
1044         struct lov_stripe_md *lsm = NULL;
1045         struct obd_trans_info oti = { 0 };
1046         struct obdo *oa;
1047         struct obd_capa *oc = NULL;
1048         int rc;
1049         ENTRY;
1050
1051         /* req is swabbed so this is safe */
1052         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1053         if (!(body->valid & OBD_MD_FLEASIZE))
1054                 RETURN(0);
1055
1056         if (body->eadatasize == 0) {
1057                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1058                 GOTO(out, rc = -EPROTO);
1059         }
1060
1061         /* The MDS sent back the EA because we unlinked the last reference
1062          * to this file. Use this EA to unlink the objects on the OST.
1063          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1064          * check it is complete and sensible. */
1065         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1066                                               body->eadatasize);
1067         LASSERT(eadata != NULL);
1068
1069         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1070         if (rc < 0) {
1071                 CERROR("obd_unpackmd: %d\n", rc);
1072                 GOTO(out, rc);
1073         }
1074         LASSERT(rc >= sizeof(*lsm));
1075
1076         OBDO_ALLOC(oa);
1077         if (oa == NULL)
1078                 GOTO(out_free_memmd, rc = -ENOMEM);
1079
1080         oa->o_id = lsm->lsm_object_id;
1081         oa->o_seq = lsm->lsm_object_seq;
1082         oa->o_mode = body->mode & S_IFMT;
1083         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1084
1085         if (body->valid & OBD_MD_FLCOOKIE) {
1086                 oa->o_valid |= OBD_MD_FLCOOKIE;
1087                 oti.oti_logcookies =
1088                         req_capsule_server_sized_get(&request->rq_pill,
1089                                                      &RMF_LOGCOOKIES,
1090                                                    sizeof(struct llog_cookie) *
1091                                                      lsm->lsm_stripe_count);
1092                 if (oti.oti_logcookies == NULL) {
1093                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1094                         body->valid &= ~OBD_MD_FLCOOKIE;
1095                 }
1096         }
1097
1098         if (body->valid & OBD_MD_FLOSSCAPA) {
1099                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1100                 if (rc)
1101                         GOTO(out_free_memmd, rc);
1102         }
1103
1104         rc = obd_destroy(NULL, ll_i2dtexp(dir), oa, lsm, &oti,
1105                          ll_i2mdexp(dir), oc);
1106         capa_put(oc);
1107         OBDO_FREE(oa);
1108         if (rc)
1109                 CERROR("obd destroy objid "LPX64" error %d\n",
1110                        lsm->lsm_object_id, rc);
1111  out_free_memmd:
1112         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1113  out:
1114         return rc;
1115 }
1116
1117 /* ll_unlink_generic() doesn't update the inode with the new link count.
1118  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
1119  * is any lock existing. They will recycle dentries and inodes based upon locks
1120  * too. b=20433 */
1121 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1122                              struct dentry *dchild, struct qstr *name)
1123 {
1124         struct ptlrpc_request *request = NULL;
1125         struct md_op_data *op_data;
1126         int rc;
1127         ENTRY;
1128         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1129                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1130
1131         /*
1132          * XXX: unlink bind mountpoint maybe call to here,
1133          * just check it as vfs_unlink does.
1134          */
1135         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1136                 RETURN(-EBUSY);
1137
1138         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1139                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1140         if (IS_ERR(op_data))
1141                 RETURN(PTR_ERR(op_data));
1142
1143         ll_get_child_fid(dir, name, &op_data->op_fid3);
1144         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1145         ll_finish_md_op_data(op_data);
1146         if (rc)
1147                 GOTO(out, rc);
1148
1149         ll_update_times(request, dir);
1150         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1151
1152         rc = ll_objects_destroy(request, dir);
1153  out:
1154         ptlrpc_req_finished(request);
1155         RETURN(rc);
1156 }
1157
1158 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1159                              struct dentry *src_dchild, struct qstr *src_name,
1160                              struct inode *tgt, struct dentry *tgt_dparent,
1161                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1162 {
1163         struct ptlrpc_request *request = NULL;
1164         struct ll_sb_info *sbi = ll_i2sbi(src);
1165         struct md_op_data *op_data;
1166         int err;
1167         ENTRY;
1168         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1169                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1170                src->i_ino, src->i_generation, src, tgt_name->len,
1171                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1172
1173         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1174             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1175                 RETURN(-EBUSY);
1176
1177         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1178                                      LUSTRE_OPC_ANY, NULL);
1179         if (IS_ERR(op_data))
1180                 RETURN(PTR_ERR(op_data));
1181
1182         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1183         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1184         err = md_rename(sbi->ll_md_exp, op_data,
1185                         src_name->name, src_name->len,
1186                         tgt_name->name, tgt_name->len, &request);
1187         ll_finish_md_op_data(op_data);
1188         if (!err) {
1189                 ll_update_times(request, src);
1190                 ll_update_times(request, tgt);
1191                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1192                 err = ll_objects_destroy(request, src);
1193         }
1194
1195         ptlrpc_req_finished(request);
1196
1197         RETURN(err);
1198 }
1199
1200 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1201                     ll_dev_t rdev)
1202 {
1203         return ll_mknod_generic(dir, &dchild->d_name, mode,
1204                                 old_encode_dev(rdev), dchild);
1205 }
1206
1207 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1208 {
1209         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1210 }
1211 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1212 {
1213         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1214 }
1215 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1216 {
1217         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1218 }
1219 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1220                       const char *oldname)
1221 {
1222         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1223 }
1224 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1225                    struct dentry *new_dentry)
1226 {
1227         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1228                                new_dentry);
1229 }
1230 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1231                      struct inode *new_dir, struct dentry *new_dentry)
1232 {
1233         int err;
1234         err = ll_rename_generic(old_dir, NULL,
1235                                  old_dentry, &old_dentry->d_name,
1236                                  new_dir, NULL, new_dentry,
1237                                  &new_dentry->d_name);
1238         if (!err) {
1239 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
1240                 if (!S_ISDIR(old_dentry->d_inode->i_mode))
1241 #endif
1242                         d_move(old_dentry, new_dentry);
1243         }
1244         return err;
1245 }
1246
1247 struct inode_operations ll_dir_inode_operations = {
1248         .mknod              = ll_mknod,
1249         .lookup             = ll_lookup_nd,
1250         .create             = ll_create_nd,
1251         /* We need all these non-raw things for NFSD, to not patch it. */
1252         .unlink             = ll_unlink,
1253         .mkdir              = ll_mkdir,
1254         .rmdir              = ll_rmdir,
1255         .symlink            = ll_symlink,
1256         .link               = ll_link,
1257         .rename             = ll_rename,
1258         .setattr            = ll_setattr,
1259         .getattr            = ll_getattr,
1260         .permission         = ll_inode_permission,
1261         .setxattr           = ll_setxattr,
1262         .getxattr           = ll_getxattr,
1263         .listxattr          = ll_listxattr,
1264         .removexattr        = ll_removexattr,
1265 };
1266
1267 struct inode_operations ll_special_inode_operations = {
1268         .setattr        = ll_setattr,
1269         .getattr        = ll_getattr,
1270         .permission     = ll_inode_permission,
1271         .setxattr       = ll_setxattr,
1272         .getxattr       = ll_getxattr,
1273         .listxattr      = ll_listxattr,
1274         .removexattr    = ll_removexattr,
1275 };