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;
 136
 137                         ll_read_inode2(inode, md);
 138                         rc = cl_inode_init(inode, md);
 139                         if (rc != 0) {
 140                                 md->lsm = NULL;
 141                                 make_bad_inode(inode);
 142                                 unlock_new_inode(inode);
 143                                 iput(inode);
 144                                 inode = ERR_PTR(rc);
 145                         } else
 146                                 unlock_new_inode(inode);
 147                 } else if (!(inode->i_state & (I_FREEING | I_CLEAR)))
 148                                 ll_update_inode(inode, md);
 149                 CDEBUG(D_VFSTRACE, "got inode: %p for "DFID"\n",
 150                        inode, PFID(&md->body->fid1));
 151         }
 152         RETURN(inode);
 153 }
 154
 155 static void ll_drop_negative_dentry(struct inode *dir)
 156 {
 157         struct dentry *dentry, *tmp_alias, *tmp_subdir;
 158
 159         cfs_spin_lock(&ll_lookup_lock);
 160         spin_lock(&dcache_lock);
 161 restart:
 162         list_for_each_entry_safe(dentry, tmp_alias,
 163                                  &dir->i_dentry,d_alias) {
 164                 if (!list_empty(&dentry->d_subdirs)) {
 165                         struct dentry *child;
 166                         list_for_each_entry_safe(child, tmp_subdir,
 167                                                  &dentry->d_subdirs,
 168                                                  d_child) {
 169                                 /* XXX Print some debug here? */
 170                                 if (!child->d_inode)
 171                                 /* Negative dentry. If we were
 172                                    dropping dcache lock, go
 173                                    throught the list again */
 174                                         if (ll_drop_dentry(child))
 175                                                 goto restart;
 176                         }
 177                 }
 178         }
 179         spin_unlock(&dcache_lock);
 180         cfs_spin_unlock(&ll_lookup_lock);
 181 }
 182
 183
 184 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 185                        void *data, int flag)
 186 {
 187         int rc;
 188         struct lustre_handle lockh;
 189         ENTRY;
 190
 191         switch (flag) {
 192         case LDLM_CB_BLOCKING:
 193                 ldlm_lock2handle(lock, &lockh);
 194                 rc = ldlm_cli_cancel(&lockh);
 195                 if (rc < 0) {
 196                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 197                         RETURN(rc);
 198                 }
 199                 break;
 200         case LDLM_CB_CANCELING: {
 201                 struct inode *inode = ll_inode_from_lock(lock);
 202                 struct ll_inode_info *lli;
 203                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 204                 struct lu_fid *fid;
 205                 ldlm_mode_t mode = lock->l_req_mode;
 206
 207                 /* Invalidate all dentries associated with this inode */
 208                 if (inode == NULL)
 209                         break;
 210
 211                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
 212                 /* For OPEN locks we differentiate between lock modes - CR, CW. PR - bug 22891 */
 213                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE))
 214                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
 215
 216                 if (bits & MDS_INODELOCK_OPEN)
 217                         ll_have_md_lock(inode, &bits, mode);
 218
 219                 fid = ll_inode2fid(inode);
 220                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
 221                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
 222                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
 223                         LDLM_ERROR(lock, "data mismatch with object "
 224                                    DFID" (%p)", PFID(fid), inode);
 225                 }
 226
 227                 if (bits & MDS_INODELOCK_OPEN) {
 228                         int flags = 0;
 229                         switch (lock->l_req_mode) {
 230                         case LCK_CW:
 231                                 flags = FMODE_WRITE;
 232                                 break;
 233                         case LCK_PR:
 234                                 flags = FMODE_EXEC;
 235                                 break;
 236                         case LCK_CR:
 237                                 flags = FMODE_READ;
 238                                 break;
 239                         default:
 240                                 CERROR("Unexpected lock mode for OPEN lock "
 241                                        "%d, inode %ld\n", lock->l_req_mode,
 242                                        inode->i_ino);
 243                         }
 244                         ll_md_real_close(inode, flags);
 245                 }
 246
 247                 lli = ll_i2info(inode);
 248                 if (bits & MDS_INODELOCK_UPDATE)
 249                         lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 250
 251                 if (S_ISDIR(inode->i_mode) &&
 252                      (bits & MDS_INODELOCK_UPDATE)) {
 253                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 254                                inode->i_ino);
 255                         truncate_inode_pages(inode->i_mapping, 0);
 256                         ll_drop_negative_dentry(inode);
 257                 }
 258
 259                 if (inode->i_sb->s_root &&
 260                     inode != inode->i_sb->s_root->d_inode &&
 261                     (bits & MDS_INODELOCK_LOOKUP))
 262                         ll_unhash_aliases(inode);
 263                 iput(inode);
 264                 break;
 265         }
 266         default:
 267                 LBUG();
 268         }
 269
 270         RETURN(0);
 271 }
 272
 273 __u32 ll_i2suppgid(struct inode *i)
 274 {
 275         if (cfs_curproc_is_in_groups(i->i_gid))
 276                 return (__u32)i->i_gid;
 277         else
 278                 return (__u32)(-1);
 279 }
 280
 281 /* Pack the required supplementary groups into the supplied groups array.
 282  * If we don't need to use the groups from the target inode(s) then we
 283  * instead pack one or more groups from the user's supplementary group
 284  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 285 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 286 {
 287 #if 0
 288         int i;
 289 #endif
 290
 291         LASSERT(i1 != NULL);
 292         LASSERT(suppgids != NULL);
 293
 294         suppgids[0] = ll_i2suppgid(i1);
 295
 296         if (i2)
 297                 suppgids[1] = ll_i2suppgid(i2);
 298                 else
 299                         suppgids[1] = -1;
 300
 301 #if 0
 302         for (i = 0; i < current_ngroups; i++) {
 303                 if (suppgids[0] == -1) {
 304                         if (current_groups[i] != suppgids[1])
 305                                 suppgids[0] = current_groups[i];
 306                         continue;
 307                 }
 308                 if (suppgids[1] == -1) {
 309                         if (current_groups[i] != suppgids[0])
 310                                 suppgids[1] = current_groups[i];
 311                         continue;
 312                 }
 313                 break;
 314         }
 315 #endif
 316 }
 317
 318 static void ll_d_add(struct dentry *de, struct inode *inode)
 319 {
 320         CDEBUG(D_DENTRY, "adding inode %p to dentry %p\n", inode, de);
 321         /* d_instantiate */
 322         if (!list_empty(&de->d_alias)) {
 323                 spin_unlock(&dcache_lock);
 324                 CERROR("dentry %.*s %p alias next %p, prev %p\n",
 325                        de->d_name.len, de->d_name.name, de,
 326                        de->d_alias.next, de->d_alias.prev);
 327                 LBUG();
 328         }
 329         if (inode)
 330                 list_add(&de->d_alias, &inode->i_dentry);
 331         de->d_inode = inode;
 332
 333         /* d_rehash */
 334         if (!d_unhashed(de)) {
 335                 spin_unlock(&dcache_lock);
 336                 CERROR("dentry %.*s %p hash next %p\n",
 337                        de->d_name.len, de->d_name.name, de, de->d_hash.next);
 338                 LBUG();
 339         }
 340         d_rehash_cond(de, 0);
 341 }
 342
 343 /* Search "inode"'s alias list for a dentry that has the same name and parent
 344  * as de.  If found, return it.  If not found, return de.
 345  * Lustre can't use d_add_unique because don't unhash aliases for directory
 346  * in ll_revalidate_it.  After revaliadate inode will be have hashed aliases
 347  * and it triggers BUG_ON in d_instantiate_unique (bug #10954).
 348  */
 349 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *de)
 350 {
 351         struct list_head *tmp;
 352         struct dentry *dentry;
 353         struct dentry *last_discon = NULL;
 354
 355         cfs_spin_lock(&ll_lookup_lock);
 356         spin_lock(&dcache_lock);
 357         list_for_each(tmp, &inode->i_dentry) {
 358                 dentry = list_entry(tmp, struct dentry, d_alias);
 359
 360                 /* We are called here with 'de' already on the aliases list. */
 361                 if (unlikely(dentry == de)) {
 362                         CERROR("whoops\n");
 363                         continue;
 364                 }
 365
 366                 if (dentry->d_flags & DCACHE_DISCONNECTED) {
 367                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
 368                         last_discon = dentry;
 369                         continue;
 370                 }
 371
 372                 if (dentry->d_parent != de->d_parent)
 373                         continue;
 374
 375                 if (dentry->d_name.hash != de->d_name.hash)
 376                         continue;
 377
 378                 if (dentry->d_name.len != de->d_name.len)
 379                         continue;
 380
 381                 if (memcmp(dentry->d_name.name, de->d_name.name,
 382                            de->d_name.len) != 0)
 383                         continue;
 384
 385                 dget_locked(dentry);
 386                 lock_dentry(dentry);
 387                 __d_drop(dentry);
 388                 unlock_dentry(dentry);
 389                 ll_dops_init(dentry, 0, 1);
 390                 d_rehash_cond(dentry, 0); /* avoid taking dcache_lock inside */
 391                 spin_unlock(&dcache_lock);
 392                 cfs_spin_unlock(&ll_lookup_lock);
 393                 iput(inode);
 394                 CDEBUG(D_DENTRY, "alias dentry %.*s (%p) parent %p inode %p "
 395                        "refc %d\n", de->d_name.len, de->d_name.name, de,
 396                        de->d_parent, de->d_inode, atomic_read(&de->d_count));
 397                 return dentry;
 398         }
 399
 400         if (last_discon) {
 401                 CDEBUG(D_DENTRY, "Reuse disconnected dentry %p inode %p "
 402                         "refc %d\n", last_discon, last_discon->d_inode,
 403                         atomic_read(&last_discon->d_count));
 404                 dget_locked(last_discon);
 405                 lock_dentry(last_discon);
 406                 last_discon->d_flags |= DCACHE_LUSTRE_INVALID;
 407                 unlock_dentry(last_discon);
 408                 spin_unlock(&dcache_lock);
 409                 cfs_spin_unlock(&ll_lookup_lock);
 410                 ll_dops_init(last_discon, 1, 1);
 411                 d_rehash(de);
 412                 d_move(last_discon, de);
 413                 iput(inode);
 414                 return last_discon;
 415         }
 416         lock_dentry(de);
 417         de->d_flags |= DCACHE_LUSTRE_INVALID;
 418         unlock_dentry(de);
 419         ll_d_add(de, inode);
 420
 421         spin_unlock(&dcache_lock);
 422         cfs_spin_unlock(&ll_lookup_lock);
 423
 424         return de;
 425 }
 426
 427 int ll_lookup_it_finish(struct ptlrpc_request *request,
 428                         struct lookup_intent *it, void *data)
 429 {
 430         struct it_cb_data *icbd = data;
 431         struct dentry **de = icbd->icbd_childp;
 432         struct inode *parent = icbd->icbd_parent;
 433         struct ll_sb_info *sbi = ll_i2sbi(parent);
 434         struct inode *inode = NULL;
 435         int rc;
 436         ENTRY;
 437
 438         /* NB 1 request reference will be taken away by ll_intent_lock()
 439          * when I return */
 440         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 441                 struct dentry *save = *de;
 442                 __u32 bits;
 443
 444                 rc = ll_prep_inode(&inode, request, (*de)->d_sb);
 445                 if (rc)
 446                         RETURN(rc);
 447
 448                 CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
 449                        inode, inode->i_ino, inode->i_generation);
 450                 md_set_lock_data(sbi->ll_md_exp,
 451                                  &it->d.lustre.it_lock_handle, inode, &bits);
 452
 453                 /* We used to query real size from OSTs here, but actually
 454                    this is not needed. For stat() calls size would be updated
 455                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 456                    2.4 and
 457                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 458                    Everybody else who needs correct file size would call
 459                    cl_glimpse_size or some equivalent themselves anyway.
 460                    Also see bug 7198. */
 461                 ll_dops_init(*de, 1, 1);
 462                 *de = ll_find_alias(inode, *de);
 463                 if (*de != save) {
 464                         struct ll_dentry_data *lld = ll_d2d(*de);
 465
 466                         /* just make sure the ll_dentry_data is ready */
 467                         if (unlikely(lld == NULL))
 468                                 ll_dops_init(*de, 1, 1);
 469                 }
 470                 /* we have lookup look - unhide dentry */
 471                 if (bits & MDS_INODELOCK_LOOKUP) {
 472                         lock_dentry(*de);
 473                         (*de)->d_flags &= ~DCACHE_LUSTRE_INVALID;
 474                         unlock_dentry(*de);
 475                 }
 476         } else {
 477                 __u64 ibits;
 478
 479                 ll_dops_init(*de, 1, 1);
 480                 /* Check that parent has UPDATE lock. If there is none, we
 481                    cannot afford to hash this dentry (done by ll_d_add) as it
 482                    might get picked up later when UPDATE lock will appear */
 483                 ibits = MDS_INODELOCK_UPDATE;
 484                 if (ll_have_md_lock(parent, &ibits, LCK_MINMODE)) {
 485                         spin_lock(&dcache_lock);
 486                         ll_d_add(*de, NULL);
 487                         spin_unlock(&dcache_lock);
 488                 } else {
 489                         /* negative lookup - and don't have update lock to
 490                          * parent */
 491                         lock_dentry(*de);
 492                         (*de)->d_flags |= DCACHE_LUSTRE_INVALID;
 493                         unlock_dentry(*de);
 494
 495                         (*de)->d_inode = NULL;
 496                         /* We do not want to hash the dentry if don`t have a
 497                          * lock, but if this dentry is later used in d_move,
 498                          * we'd hit uninitialised list head d_hash, so we just
 499                          * do this to init d_hash field but leave dentry
 500                          * unhashed. (bug 10796). */
 501                         d_rehash(*de);
 502                         d_drop(*de);
 503                 }
 504         }
 505
 506         RETURN(0);
 507 }
 508
 509 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 510                                    struct lookup_intent *it, int lookup_flags)
 511 {
 512         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 513         struct dentry *save = dentry, *retval;
 514         struct ptlrpc_request *req = NULL;
 515         struct md_op_data *op_data;
 516         struct it_cb_data icbd;
 517         __u32 opc;
 518         int rc, first = 0;
 519         ENTRY;
 520
 521         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 522                 RETURN(ERR_PTR(-ENAMETOOLONG));
 523
 524         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 525                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 526                parent->i_generation, parent, LL_IT2STR(it));
 527
 528         if (d_mountpoint(dentry))
 529                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 530
 531         ll_frob_intent(&it, &lookup_it);
 532
 533         /* As do_lookup is called before follow_mount, root dentry may be left
 534          * not valid, revalidate it here. */
 535         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 536             (it->it_op & (IT_OPEN | IT_CREAT))) {
 537                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it,
 538                                             MDS_INODELOCK_LOOKUP);
 539                 if (rc)
 540                         RETURN(ERR_PTR(rc));
 541         }
 542
 543         if (it->it_op == IT_GETATTR) {
 544                 first = ll_statahead_enter(parent, &dentry, 1);
 545                 if (first >= 0) {
 546                         ll_statahead_exit(parent, dentry, first);
 547                         if (first == 1)
 548                                 RETURN(retval = dentry);
 549                 }
 550         }
 551
 552         icbd.icbd_childp = &dentry;
 553         icbd.icbd_parent = parent;
 554
 555         if (it->it_op & IT_CREAT ||
 556             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 557                 opc = LUSTRE_OPC_CREATE;
 558         else
 559                 opc = LUSTRE_OPC_ANY;
 560
 561         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 562                                      dentry->d_name.len, lookup_flags, opc,
 563                                      NULL);
 564         if (IS_ERR(op_data))
 565                 RETURN((void *)op_data);
 566
 567         it->it_create_mode &= ~cfs_curproc_umask();
 568
 569         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 570                             lookup_flags, &req, ll_md_blocking_ast, 0);
 571         ll_finish_md_op_data(op_data);
 572         if (rc < 0)
 573                 GOTO(out, retval = ERR_PTR(rc));
 574
 575         rc = ll_lookup_it_finish(req, it, &icbd);
 576         if (rc != 0) {
 577                 ll_intent_release(it);
 578                 GOTO(out, retval = ERR_PTR(rc));
 579         }
 580
 581         if (first == -EEXIST)
 582                 ll_statahead_mark(parent, dentry);
 583
 584         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 585             !S_ISREG(dentry->d_inode->i_mode) &&
 586             !S_ISDIR(dentry->d_inode->i_mode)) {
 587                 ll_release_openhandle(dentry, it);
 588         }
 589         ll_lookup_finish_locks(it, dentry);
 590
 591         if (dentry == save)
 592                 GOTO(out, retval = NULL);
 593         else
 594                 GOTO(out, retval = dentry);
 595  out:
 596         if (req)
 597                 ptlrpc_req_finished(req);
 598         return retval;
 599 }
 600
 601 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 602                                         int lookup_flags)
 603 {
 604         struct lookup_intent *it;
 605
 606         OBD_ALLOC(it, sizeof(*it));
 607         if (!it)
 608                 return ERR_PTR(-ENOMEM);
 609
 610         if (lookup_flags & LOOKUP_OPEN) {
 611                 it->it_op = IT_OPEN;
 612                 if (lookup_flags & LOOKUP_CREATE)
 613                         it->it_op |= IT_CREAT;
 614                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
 615                 it->it_flags = oit->flags;
 616         } else {
 617                 it->it_op = IT_GETATTR;
 618         }
 619
 620 #ifndef HAVE_FILE_IN_STRUCT_INTENT
 621                 /* Since there is no way to pass our intent to ll_file_open,
 622                  * just check the file is there. Actual open will be done
 623                  * in ll_file_open */
 624                 if (it->it_op & IT_OPEN)
 625                         it->it_op = IT_LOOKUP;
 626 #endif
 627
 628         return it;
 629 }
 630
 631 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 632                                    struct nameidata *nd)
 633 {
 634         struct dentry *de;
 635         ENTRY;
 636
 637         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 638                 struct lookup_intent *it;
 639
 640 #if defined(HAVE_FILE_IN_STRUCT_INTENT) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 641                 /* Did we came here from failed revalidate just to propagate
 642                  * its error? */
 643                 if (nd->flags & LOOKUP_OPEN)
 644                         if (IS_ERR(nd->intent.open.file))
 645                                 RETURN((struct dentry *)nd->intent.open.file);
 646 #endif
 647                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 648                         it = ll_d2d(dentry)->lld_it;
 649                         ll_d2d(dentry)->lld_it = NULL;
 650                 } else {
 651                         if ((nd->flags & LOOKUP_CREATE ) && !(nd->flags & LOOKUP_OPEN)) {
 652                                 /* We are sure this is new dentry, so we need to create
 653                                    our private data and set the dentry ops */
 654                                 ll_dops_init(dentry, 1, 1);
 655                                 RETURN(NULL);
 656                         }
 657                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 658                         if (IS_ERR(it))
 659                                 RETURN((struct dentry *)it);
 660                 }
 661
 662                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 663                 if (de)
 664                         dentry = de;
 665                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 666                         if (dentry->d_inode &&
 667                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 668 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 669                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 670                                         // We cannot call open here as it would
 671                                         // deadlock.
 672                                         ptlrpc_req_finished(
 673                                                        (struct ptlrpc_request *)
 674                                                           it->d.lustre.it_data);
 675                                 } else {
 676 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 677 /* 2.6.1[456] have a bug in open_namei() that forgets to check
 678  * nd->intent.open.file for error, so we need to return it as lookup's result
 679  * instead */
 680                                         struct file *filp;
 681                                         nd->intent.open.file->private_data = it;
 682                                         filp =lookup_instantiate_filp(nd,dentry,
 683                                                                       NULL);
 684                                         if (IS_ERR(filp)) {
 685                                                 if (de)
 686                                                         dput(de);
 687                                                 de = (struct dentry *) filp;
 688                                         }
 689 #else
 690                                         nd->intent.open.file->private_data = it;
 691                                         (void)lookup_instantiate_filp(nd,dentry,
 692                                                                       NULL);
 693 #endif
 694
 695                                 }
 696 #else /* HAVE_FILE_IN_STRUCT_INTENT */
 697                                 /* Release open handle as we have no way to
 698                                  * pass it to ll_file_open */
 699                                 ll_release_openhandle(dentry, it);
 700 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
 701                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 702                                 // XXX This can only reliably work on assumption
 703                                 // that there are NO hashed negative dentries.
 704                                 ll_d2d(dentry)->lld_it = it;
 705                                 it = NULL; /* Will be freed in ll_create_nd */
 706                                 /* We absolutely depend on ll_create_nd to be
 707                                  * called to not leak this intent and possible
 708                                  * data attached to it */
 709                         }
 710                 }
 711
 712                 if (it) {
 713                         ll_intent_release(it);
 714                         OBD_FREE(it, sizeof(*it));
 715                 }
 716         } else {
 717                 de = ll_lookup_it(parent, dentry, NULL, 0);
 718         }
 719
 720         RETURN(de);
 721 }
 722
 723 /* We depend on "mode" being set with the proper file type/umask by now */
 724 static struct inode *ll_create_node(struct inode *dir, const char *name,
 725                                     int namelen, const void *data, int datalen,
 726                                     int mode, __u64 extra,
 727                                     struct lookup_intent *it)
 728 {
 729         struct inode *inode = NULL;
 730         struct ptlrpc_request *request = NULL;
 731         struct ll_sb_info *sbi = ll_i2sbi(dir);
 732         int rc;
 733         ENTRY;
 734
 735         LASSERT(it && it->d.lustre.it_disposition);
 736
 737         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 738         request = it->d.lustre.it_data;
 739         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 740         rc = ll_prep_inode(&inode, request, dir->i_sb);
 741         if (rc)
 742                 GOTO(out, inode = ERR_PTR(rc));
 743
 744         LASSERT(list_empty(&inode->i_dentry));
 745
 746         /* We asked for a lock on the directory, but were granted a
 747          * lock on the inode.  Since we finally have an inode pointer,
 748          * stuff it in the lock. */
 749         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 750                inode, inode->i_ino, inode->i_generation);
 751         md_set_lock_data(sbi->ll_md_exp,
 752                          &it->d.lustre.it_lock_handle, inode, NULL);
 753         EXIT;
 754  out:
 755         ptlrpc_req_finished(request);
 756         return inode;
 757 }
 758
 759 /*
 760  * By the time this is called, we already have created the directory cache
 761  * entry for the new file, but it is so far negative - it has no inode.
 762  *
 763  * We defer creating the OBD object(s) until open, to keep the intent and
 764  * non-intent code paths similar, and also because we do not have the MDS
 765  * inode number before calling ll_create_node() (which is needed for LOV),
 766  * so we would need to do yet another RPC to the MDS to store the LOV EA
 767  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 768  * lmm_size in datalen (the MDS still has code which will handle that).
 769  *
 770  * If the create succeeds, we fill in the inode information
 771  * with d_instantiate().
 772  */
 773 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 774                         struct lookup_intent *it)
 775 {
 776         struct inode *inode;
 777         int rc = 0;
 778         ENTRY;
 779
 780         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 781                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 782                dir->i_generation, dir, LL_IT2STR(it));
 783
 784         rc = it_open_error(DISP_OPEN_CREATE, it);
 785         if (rc)
 786                 RETURN(rc);
 787
 788         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 789                                NULL, 0, mode, 0, it);
 790         if (IS_ERR(inode))
 791                 RETURN(PTR_ERR(inode));
 792
 793         d_instantiate(dentry, inode);
 794         /* Negative dentry may be unhashed if parent does not have UPDATE lock,
 795          * but some callers, e.g. do_coredump, expect dentry to be hashed after
 796          * successful create. Hash it here. */
 797         spin_lock(&dcache_lock);
 798         if (d_unhashed(dentry))
 799                 d_rehash_cond(dentry, 0);
 800         spin_unlock(&dcache_lock);
 801         RETURN(0);
 802 }
 803
 804 static void ll_update_times(struct ptlrpc_request *request,
 805                             struct inode *inode)
 806 {
 807         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 808                                                        &RMF_MDT_BODY);
 809
 810         LASSERT(body);
 811         if (body->valid & OBD_MD_FLMTIME &&
 812             body->mtime > LTIME_S(inode->i_mtime)) {
 813                 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to "LPU64"\n",
 814                        inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
 815                 LTIME_S(inode->i_mtime) = body->mtime;
 816         }
 817         if (body->valid & OBD_MD_FLCTIME &&
 818             body->ctime > LTIME_S(inode->i_ctime))
 819                 LTIME_S(inode->i_ctime) = body->ctime;
 820 }
 821
 822 static int ll_new_node(struct inode *dir, struct qstr *name,
 823                        const char *tgt, int mode, int rdev,
 824                        struct dentry *dchild, __u32 opc)
 825 {
 826         struct ptlrpc_request *request = NULL;
 827         struct md_op_data *op_data;
 828         struct inode *inode = NULL;
 829         struct ll_sb_info *sbi = ll_i2sbi(dir);
 830         int tgt_len = 0;
 831         int err;
 832
 833         ENTRY;
 834         if (unlikely(tgt != NULL))
 835                 tgt_len = strlen(tgt) + 1;
 836
 837         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 838                                      name->len, 0, opc, NULL);
 839         if (IS_ERR(op_data))
 840                 GOTO(err_exit, err = PTR_ERR(op_data));
 841
 842         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 843                         cfs_curproc_fsuid(), cfs_curproc_fsgid(),
 844                         cfs_curproc_cap_pack(), rdev, &request);
 845         ll_finish_md_op_data(op_data);
 846         if (err)
 847                 GOTO(err_exit, err);
 848
 849         ll_update_times(request, dir);
 850
 851         if (dchild) {
 852                 err = ll_prep_inode(&inode, request, dchild->d_sb);
 853                 if (err)
 854                      GOTO(err_exit, err);
 855
 856                 d_drop(dchild);
 857                 d_instantiate(dchild, inode);
 858         }
 859         EXIT;
 860 err_exit:
 861         ptlrpc_req_finished(request);
 862
 863         return err;
 864 }
 865
 866 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 867                             unsigned rdev, struct dentry *dchild)
 868 {
 869         int err;
 870         ENTRY;
 871
 872         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 873                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 874                mode, rdev);
 875
 876         mode &= ~cfs_curproc_umask();
 877
 878         switch (mode & S_IFMT) {
 879         case 0:
 880                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 881         case S_IFREG:
 882         case S_IFCHR:
 883         case S_IFBLK:
 884         case S_IFIFO:
 885         case S_IFSOCK:
 886                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 887                                   LUSTRE_OPC_MKNOD);
 888                 break;
 889         case S_IFDIR:
 890                 err = -EPERM;
 891                 break;
 892         default:
 893                 err = -EINVAL;
 894         }
 895         RETURN(err);
 896 }
 897
 898 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 899                         int mode, struct nameidata *nd)
 900 {
 901         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 902         int rc;
 903
 904         if (!it)
 905                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 906
 907         ll_d2d(dentry)->lld_it = NULL;
 908
 909         /* Was there an error? Propagate it! */
 910         if (it->d.lustre.it_status) {
 911                 rc = it->d.lustre.it_status;
 912                 goto out;
 913         }
 914
 915         rc = ll_create_it(dir, dentry, mode, it);
 916 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 917         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 918                 nd->intent.open.file->private_data = it;
 919                 lookup_instantiate_filp(nd, dentry, NULL);
 920         }
 921 #else
 922         ll_release_openhandle(dentry,it);
 923 #endif
 924
 925 out:
 926         ll_intent_release(it);
 927         OBD_FREE(it, sizeof(*it));
 928
 929         return rc;
 930 }
 931
 932 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 933                               const char *tgt, struct dentry *dchild)
 934 {
 935         int err;
 936         ENTRY;
 937
 938         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 939                name->len, name->name, dir->i_ino, dir->i_generation,
 940                dir, 3000, tgt);
 941
 942         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 943                           0, dchild, LUSTRE_OPC_SYMLINK);
 944         RETURN(err);
 945 }
 946
 947 static int ll_link_generic(struct inode *src,  struct inode *dir,
 948                            struct qstr *name, struct dentry *dchild)
 949 {
 950         struct ll_sb_info *sbi = ll_i2sbi(dir);
 951         struct ptlrpc_request *request = NULL;
 952         struct md_op_data *op_data;
 953         int err;
 954
 955         ENTRY;
 956         CDEBUG(D_VFSTRACE,
 957                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
 958                src->i_ino, src->i_generation, src, dir->i_ino,
 959                dir->i_generation, dir, name->len, name->name);
 960
 961         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
 962                                      0, LUSTRE_OPC_ANY, NULL);
 963         if (IS_ERR(op_data))
 964                 RETURN(PTR_ERR(op_data));
 965
 966         err = md_link(sbi->ll_md_exp, op_data, &request);
 967         ll_finish_md_op_data(op_data);
 968         if (err)
 969                 GOTO(out, err);
 970         if (dchild)
 971                 d_drop(dchild);
 972
 973         ll_update_times(request, dir);
 974         EXIT;
 975 out:
 976         ptlrpc_req_finished(request);
 977         RETURN(err);
 978 }
 979
 980 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
 981                             int mode, struct dentry *dchild)
 982
 983 {
 984         int err;
 985         ENTRY;
 986
 987         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 988                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 989
 990         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~cfs_curproc_umask()) | S_IFDIR;
 991         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
 992
 993         RETURN(err);
 994 }
 995
 996 /* Try to find the child dentry by its name.
 997    If found, put the result fid into @fid. */
 998 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
 999                              struct lu_fid *fid)
1000 {
1001         struct dentry *parent, *child;
1002
1003         parent = list_entry(dir->i_dentry.next, struct dentry, d_alias);
1004         child = d_lookup(parent, name);
1005         if (child) {
1006                 if (child->d_inode)
1007                         *fid = *ll_inode2fid(child->d_inode);
1008                 dput(child);
1009         }
1010 }
1011
1012 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1013                             struct dentry *dchild, struct qstr *name)
1014 {
1015         struct ptlrpc_request *request = NULL;
1016         struct md_op_data *op_data;
1017         int rc;
1018         ENTRY;
1019
1020         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1021                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1022
1023         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1024                 RETURN(-EBUSY);
1025
1026         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1027                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1028         if (IS_ERR(op_data))
1029                 RETURN(PTR_ERR(op_data));
1030
1031         ll_get_child_fid(dir, name, &op_data->op_fid3);
1032         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1033         ll_finish_md_op_data(op_data);
1034         if (rc == 0)
1035                 ll_update_times(request, dir);
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(ll_i2dtexp(dir), oa, lsm, &oti, ll_i2mdexp(dir), oc);
1105         capa_put(oc);
1106         OBDO_FREE(oa);
1107         if (rc)
1108                 CERROR("obd destroy objid "LPX64" error %d\n",
1109                        lsm->lsm_object_id, rc);
1110  out_free_memmd:
1111         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1112  out:
1113         return rc;
1114 }
1115
1116 /* ll_unlink_generic() doesn't update the inode with the new link count.
1117  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
1118  * is any lock existing. They will recycle dentries and inodes based upon locks
1119  * too. b=20433 */
1120 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1121                              struct dentry *dchild, struct qstr *name)
1122 {
1123         struct ptlrpc_request *request = NULL;
1124         struct md_op_data *op_data;
1125         int rc;
1126         ENTRY;
1127         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1128                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1129
1130         /*
1131          * XXX: unlink bind mountpoint maybe call to here,
1132          * just check it as vfs_unlink does.
1133          */
1134         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1135                 RETURN(-EBUSY);
1136
1137         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1138                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1139         if (IS_ERR(op_data))
1140                 RETURN(PTR_ERR(op_data));
1141
1142         ll_get_child_fid(dir, name, &op_data->op_fid3);
1143         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1144         ll_finish_md_op_data(op_data);
1145         if (rc)
1146                 GOTO(out, rc);
1147
1148         ll_update_times(request, dir);
1149
1150         rc = ll_objects_destroy(request, dir);
1151  out:
1152         ptlrpc_req_finished(request);
1153         RETURN(rc);
1154 }
1155
1156 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1157                              struct dentry *src_dchild, struct qstr *src_name,
1158                              struct inode *tgt, struct dentry *tgt_dparent,
1159                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1160 {
1161         struct ptlrpc_request *request = NULL;
1162         struct ll_sb_info *sbi = ll_i2sbi(src);
1163         struct md_op_data *op_data;
1164         int err;
1165         ENTRY;
1166         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1167                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1168                src->i_ino, src->i_generation, src, tgt_name->len,
1169                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1170
1171         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1172             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1173                 RETURN(-EBUSY);
1174
1175         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1176                                      LUSTRE_OPC_ANY, NULL);
1177         if (IS_ERR(op_data))
1178                 RETURN(PTR_ERR(op_data));
1179
1180         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1181         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1182         err = md_rename(sbi->ll_md_exp, op_data,
1183                         src_name->name, src_name->len,
1184                         tgt_name->name, tgt_name->len, &request);
1185         ll_finish_md_op_data(op_data);
1186         if (!err) {
1187                 ll_update_times(request, src);
1188                 ll_update_times(request, tgt);
1189                 err = ll_objects_destroy(request, src);
1190         }
1191
1192         ptlrpc_req_finished(request);
1193
1194         RETURN(err);
1195 }
1196
1197 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1198                     ll_dev_t rdev)
1199 {
1200         return ll_mknod_generic(dir, &dchild->d_name, mode,
1201                                 old_encode_dev(rdev), dchild);
1202 }
1203
1204 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1205 {
1206         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1207 }
1208 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1209 {
1210         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1211 }
1212 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1213 {
1214         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1215 }
1216 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1217                       const char *oldname)
1218 {
1219         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1220 }
1221 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1222                    struct dentry *new_dentry)
1223 {
1224         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1225                                new_dentry);
1226 }
1227 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1228                      struct inode *new_dir, struct dentry *new_dentry)
1229 {
1230         int err;
1231         err = ll_rename_generic(old_dir, NULL,
1232                                  old_dentry, &old_dentry->d_name,
1233                                  new_dir, NULL, new_dentry,
1234                                  &new_dentry->d_name);
1235         if (!err) {
1236 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
1237                 if (!S_ISDIR(old_dentry->d_inode->i_mode))
1238 #endif
1239                         d_move(old_dentry, new_dentry);
1240         }
1241         return err;
1242 }
1243
1244 struct inode_operations ll_dir_inode_operations = {
1245         .mknod              = ll_mknod,
1246         .lookup             = ll_lookup_nd,
1247         .create             = ll_create_nd,
1248         /* We need all these non-raw things for NFSD, to not patch it. */
1249         .unlink             = ll_unlink,
1250         .mkdir              = ll_mkdir,
1251         .rmdir              = ll_rmdir,
1252         .symlink            = ll_symlink,
1253         .link               = ll_link,
1254         .rename             = ll_rename,
1255         .setattr            = ll_setattr,
1256         .getattr            = ll_getattr,
1257         .permission         = ll_inode_permission,
1258         .setxattr           = ll_setxattr,
1259         .getxattr           = ll_getxattr,
1260         .listxattr          = ll_listxattr,
1261         .removexattr        = ll_removexattr,
1262 };
1263
1264 struct inode_operations ll_special_inode_operations = {
1265         .setattr        = ll_setattr,
1266         .getattr        = ll_getattr,
1267         .permission     = ll_inode_permission,
1268         .setxattr       = ll_setxattr,
1269         .getxattr       = ll_getxattr,
1270         .listxattr      = ll_listxattr,
1271         .removexattr    = ll_removexattr,
1272 };