drivers/staging/lustre/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, Intel Corporation.
  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/quotaops.h>
  41 #include <linux/highmem.h>
  42 #include <linux/pagemap.h>
  43 #include <linux/security.h>
  44
  45 #define DEBUG_SUBSYSTEM S_LLITE
  46
  47 #include <obd_support.h>
  48 #include <lustre_fid.h>
  49 #include <lustre_lite.h>
  50 #include <lustre_dlm.h>
  51 #include <lustre_ver.h>
  52 #include "llite_internal.h"
  53
  54 static int ll_create_it(struct inode *, struct dentry *,
  55                         int, struct lookup_intent *);
  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         ldlm_lock_decref(lockh, mode);
  81
  82         return 0;
  83 }
  84
  85
  86 /* called from iget5_locked->find_inode() under inode_hash_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
 141         LASSERT(hash != 0);
 142         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
 143
 144         if (inode) {
 145                 if (inode->i_state & I_NEW) {
 146                         int rc = 0;
 147
 148                         ll_read_inode2(inode, md);
 149                         if (S_ISREG(inode->i_mode) &&
 150                             ll_i2info(inode)->lli_clob == NULL) {
 151                                 CDEBUG(D_INODE,
 152                                         "%s: apply lsm %p to inode "DFID".\n",
 153                                         ll_get_fsname(sb, NULL, 0), md->lsm,
 154                                         PFID(ll_inode2fid(inode)));
 155                                 rc = cl_file_inode_init(inode, md);
 156                         }
 157                         if (rc != 0) {
 158                                 make_bad_inode(inode);
 159                                 unlock_new_inode(inode);
 160                                 iput(inode);
 161                                 inode = ERR_PTR(rc);
 162                         } else
 163                                 unlock_new_inode(inode);
 164                 } else if (!(inode->i_state & (I_FREEING | I_CLEAR)))
 165                         ll_update_inode(inode, md);
 166                 CDEBUG(D_VFSTRACE, "got inode: %p for "DFID"\n",
 167                        inode, PFID(&md->body->fid1));
 168         }
 169         return inode;
 170 }
 171
 172 static void ll_invalidate_negative_children(struct inode *dir)
 173 {
 174         struct dentry *dentry, *tmp_subdir;
 175         struct ll_d_hlist_node *p;
 176
 177         ll_lock_dcache(dir);
 178         ll_d_hlist_for_each_entry(dentry, p, &dir->i_dentry, d_alias) {
 179                 spin_lock(&dentry->d_lock);
 180                 if (!list_empty(&dentry->d_subdirs)) {
 181                         struct dentry *child;
 182
 183                         list_for_each_entry_safe(child, tmp_subdir,
 184                                                  &dentry->d_subdirs,
 185                                                  d_u.d_child) {
 186                                 if (child->d_inode == NULL)
 187                                         d_lustre_invalidate(child, 1);
 188                         }
 189                 }
 190                 spin_unlock(&dentry->d_lock);
 191         }
 192         ll_unlock_dcache(dir);
 193 }
 194
 195 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 196                        void *data, int flag)
 197 {
 198         int rc;
 199         struct lustre_handle lockh;
 200
 201         switch (flag) {
 202         case LDLM_CB_BLOCKING:
 203                 ldlm_lock2handle(lock, &lockh);
 204                 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
 205                 if (rc < 0) {
 206                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 207                         return rc;
 208                 }
 209                 break;
 210         case LDLM_CB_CANCELING: {
 211                 struct inode *inode = ll_inode_from_resource_lock(lock);
 212                 struct ll_inode_info *lli;
 213                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 214                 struct lu_fid *fid;
 215                 ldlm_mode_t mode = lock->l_req_mode;
 216
 217                 /* Inode is set to lock->l_resource->lr_lvb_inode
 218                  * for mdc - bug 24555 */
 219                 LASSERT(lock->l_ast_data == NULL);
 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
 227                 if (bits & MDS_INODELOCK_XATTR)
 228                         ll_xattr_cache_destroy(inode);
 229
 230                 /* For OPEN locks we differentiate between lock modes
 231                  * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
 232                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
 233                             MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM))
 234                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
 235
 236                 if (bits & MDS_INODELOCK_OPEN)
 237                         ll_have_md_lock(inode, &bits, mode);
 238
 239                 fid = ll_inode2fid(inode);
 240                 if (!fid_res_name_eq(fid, &lock->l_resource->lr_name))
 241                         LDLM_ERROR(lock, "data mismatch with object "
 242                                    DFID" (%p)", PFID(fid), inode);
 243
 244                 if (bits & MDS_INODELOCK_OPEN) {
 245                         int flags = 0;
 246                         switch (lock->l_req_mode) {
 247                         case LCK_CW:
 248                                 flags = FMODE_WRITE;
 249                                 break;
 250                         case LCK_PR:
 251                                 flags = FMODE_EXEC;
 252                                 break;
 253                         case LCK_CR:
 254                                 flags = FMODE_READ;
 255                                 break;
 256                         default:
 257                                 CERROR("Unexpected lock mode for OPEN lock "
 258                                        "%d, inode %ld\n", lock->l_req_mode,
 259                                        inode->i_ino);
 260                         }
 261                         ll_md_real_close(inode, flags);
 262                 }
 263
 264                 lli = ll_i2info(inode);
 265                 if (bits & MDS_INODELOCK_LAYOUT) {
 266                         struct cl_object_conf conf = { { 0 } };
 267
 268                         conf.coc_opc = OBJECT_CONF_INVALIDATE;
 269                         conf.coc_inode = inode;
 270                         rc = ll_layout_conf(inode, &conf);
 271                         if (rc)
 272                                 CDEBUG(D_INODE, "invaliding layout %d.\n", rc);
 273                 }
 274
 275                 if (bits & MDS_INODELOCK_UPDATE) {
 276                         spin_lock(&lli->lli_lock);
 277                         lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 278                         spin_unlock(&lli->lli_lock);
 279                 }
 280
 281                 if (S_ISDIR(inode->i_mode) &&
 282                      (bits & MDS_INODELOCK_UPDATE)) {
 283                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 284                                inode->i_ino);
 285                         truncate_inode_pages(inode->i_mapping, 0);
 286                         ll_invalidate_negative_children(inode);
 287                 }
 288
 289                 if (inode->i_sb->s_root &&
 290                     inode != inode->i_sb->s_root->d_inode &&
 291                     (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)))
 292                         ll_invalidate_aliases(inode);
 293                 iput(inode);
 294                 break;
 295         }
 296         default:
 297                 LBUG();
 298         }
 299
 300         return 0;
 301 }
 302
 303 __u32 ll_i2suppgid(struct inode *i)
 304 {
 305         if (in_group_p(i->i_gid))
 306                 return (__u32)from_kgid(&init_user_ns, i->i_gid);
 307         else
 308                 return (__u32)(-1);
 309 }
 310
 311 /* Pack the required supplementary groups into the supplied groups array.
 312  * If we don't need to use the groups from the target inode(s) then we
 313  * instead pack one or more groups from the user's supplementary group
 314  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 315 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 316 {
 317 #if 0
 318         int i;
 319 #endif
 320
 321         LASSERT(i1 != NULL);
 322         LASSERT(suppgids != NULL);
 323
 324         suppgids[0] = ll_i2suppgid(i1);
 325
 326         if (i2)
 327                 suppgids[1] = ll_i2suppgid(i2);
 328                 else
 329                         suppgids[1] = -1;
 330
 331 #if 0
 332         for (i = 0; i < current_ngroups; i++) {
 333                 if (suppgids[0] == -1) {
 334                         if (current_groups[i] != suppgids[1])
 335                                 suppgids[0] = current_groups[i];
 336                         continue;
 337                 }
 338                 if (suppgids[1] == -1) {
 339                         if (current_groups[i] != suppgids[0])
 340                                 suppgids[1] = current_groups[i];
 341                         continue;
 342                 }
 343                 break;
 344         }
 345 #endif
 346 }
 347
 348 /*
 349  * try to reuse three types of dentry:
 350  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
 351  *    by concurrent .revalidate).
 352  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
 353  *    be cleared by others calling d_lustre_revalidate).
 354  * 3. DISCONNECTED alias.
 355  */
 356 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
 357 {
 358         struct dentry *alias, *discon_alias, *invalid_alias;
 359         struct ll_d_hlist_node *p;
 360
 361         if (ll_d_hlist_empty(&inode->i_dentry))
 362                 return NULL;
 363
 364         discon_alias = invalid_alias = NULL;
 365
 366         ll_lock_dcache(inode);
 367         ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
 368                 LASSERT(alias != dentry);
 369
 370                 spin_lock(&alias->d_lock);
 371                 if (alias->d_flags & DCACHE_DISCONNECTED)
 372                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
 373                         discon_alias = alias;
 374                 else if (alias->d_parent == dentry->d_parent         &&
 375                          alias->d_name.hash == dentry->d_name.hash       &&
 376                          alias->d_name.len == dentry->d_name.len         &&
 377                          memcmp(alias->d_name.name, dentry->d_name.name,
 378                                 dentry->d_name.len) == 0)
 379                         invalid_alias = alias;
 380                 spin_unlock(&alias->d_lock);
 381
 382                 if (invalid_alias)
 383                         break;
 384         }
 385         alias = invalid_alias ?: discon_alias ?: NULL;
 386         if (alias) {
 387                 spin_lock(&alias->d_lock);
 388                 dget_dlock(alias);
 389                 spin_unlock(&alias->d_lock);
 390         }
 391         ll_unlock_dcache(inode);
 392
 393         return alias;
 394 }
 395
 396 /*
 397  * Similar to d_splice_alias(), but lustre treats invalid alias
 398  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
 399  */
 400 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
 401 {
 402         struct dentry *new;
 403         int rc;
 404
 405         if (inode) {
 406                 new = ll_find_alias(inode, de);
 407                 if (new) {
 408                         rc = ll_d_init(new);
 409                         if (rc < 0) {
 410                                 dput(new);
 411                                 return ERR_PTR(rc);
 412                         }
 413                         d_move(new, de);
 414                         iput(inode);
 415                         CDEBUG(D_DENTRY,
 416                                "Reuse dentry %p inode %p refc %d flags %#x\n",
 417                               new, new->d_inode, d_count(new), new->d_flags);
 418                         return new;
 419                 }
 420         }
 421         rc = ll_d_init(de);
 422         if (rc < 0)
 423                 return ERR_PTR(rc);
 424         d_add(de, inode);
 425         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
 426                de, de->d_inode, d_count(de), de->d_flags);
 427         return de;
 428 }
 429
 430 int ll_lookup_it_finish(struct ptlrpc_request *request,
 431                         struct lookup_intent *it, void *data)
 432 {
 433         struct it_cb_data *icbd = data;
 434         struct dentry **de = icbd->icbd_childp;
 435         struct inode *parent = icbd->icbd_parent;
 436         struct inode *inode = NULL;
 437         __u64 bits = 0;
 438         int rc;
 439
 440         /* NB 1 request reference will be taken away by ll_intent_lock()
 441          * when I return */
 442         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
 443                it->d.lustre.it_disposition);
 444         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 445                 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
 446                 if (rc)
 447                         return rc;
 448
 449                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
 450
 451                 /* We used to query real size from OSTs here, but actually
 452                    this is not needed. For stat() calls size would be updated
 453                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 454                    2.4 and
 455                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 456                    Everybody else who needs correct file size would call
 457                    ll_glimpse_size or some equivalent themselves anyway.
 458                    Also see bug 7198. */
 459         }
 460
 461         /* Only hash *de if it is unhashed (new dentry).
 462          * Atoimc_open may passin hashed dentries for open.
 463          */
 464         if (d_unhashed(*de)) {
 465                 struct dentry *alias;
 466
 467                 alias = ll_splice_alias(inode, *de);
 468                 if (IS_ERR(alias))
 469                         return PTR_ERR(alias);
 470                 *de = alias;
 471         } else if (!it_disposition(it, DISP_LOOKUP_NEG)  &&
 472                    !it_disposition(it, DISP_OPEN_CREATE)) {
 473                 /* With DISP_OPEN_CREATE dentry will
 474                    instantiated in ll_create_it. */
 475                 LASSERT((*de)->d_inode == NULL);
 476                 d_instantiate(*de, inode);
 477         }
 478
 479         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 480                 /* we have lookup look - unhide dentry */
 481                 if (bits & MDS_INODELOCK_LOOKUP)
 482                         d_lustre_revalidate(*de);
 483         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
 484                 /* If file created on server, don't depend on parent UPDATE
 485                  * lock to unhide it. It is left hidden and next lookup can
 486                  * find it in ll_splice_alias.
 487                  */
 488                 /* Check that parent has UPDATE lock. */
 489                 struct lookup_intent parent_it = {
 490                                         .it_op = IT_GETATTR,
 491                                         .d.lustre.it_lock_handle = 0 };
 492
 493                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it,
 494                                        &ll_i2info(parent)->lli_fid, NULL)) {
 495                         d_lustre_revalidate(*de);
 496                         ll_intent_release(&parent_it);
 497                 }
 498         }
 499
 500         return 0;
 501 }
 502
 503 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 504                                    struct lookup_intent *it, int lookup_flags)
 505 {
 506         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 507         struct dentry *save = dentry, *retval;
 508         struct ptlrpc_request *req = NULL;
 509         struct md_op_data *op_data;
 510         struct it_cb_data icbd;
 511         __u32 opc;
 512         int rc;
 513
 514         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 515                 return ERR_PTR(-ENAMETOOLONG);
 516
 517         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 518                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 519                parent->i_generation, parent, LL_IT2STR(it));
 520
 521         if (d_mountpoint(dentry))
 522                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 523
 524         ll_frob_intent(&it, &lookup_it);
 525
 526         if (it->it_op == IT_GETATTR) {
 527                 rc = ll_statahead_enter(parent, &dentry, 0);
 528                 if (rc == 1) {
 529                         if (dentry == save)
 530                                 GOTO(out, retval = NULL);
 531                         GOTO(out, retval = dentry);
 532                 }
 533         }
 534
 535         icbd.icbd_childp = &dentry;
 536         icbd.icbd_parent = parent;
 537
 538         if (it->it_op & IT_CREAT)
 539                 opc = LUSTRE_OPC_CREATE;
 540         else
 541                 opc = LUSTRE_OPC_ANY;
 542
 543         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 544                                      dentry->d_name.len, lookup_flags, opc,
 545                                      NULL);
 546         if (IS_ERR(op_data))
 547                 return (void *)op_data;
 548
 549         /* enforce umask if acl disabled or MDS doesn't support umask */
 550         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 551                 it->it_create_mode &= ~current_umask();
 552
 553         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 554                             lookup_flags, &req, ll_md_blocking_ast, 0);
 555         ll_finish_md_op_data(op_data);
 556         if (rc < 0)
 557                 GOTO(out, retval = ERR_PTR(rc));
 558
 559         rc = ll_lookup_it_finish(req, it, &icbd);
 560         if (rc != 0) {
 561                 ll_intent_release(it);
 562                 GOTO(out, retval = ERR_PTR(rc));
 563         }
 564
 565         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 566             !S_ISREG(dentry->d_inode->i_mode) &&
 567             !S_ISDIR(dentry->d_inode->i_mode)) {
 568                 ll_release_openhandle(dentry, it);
 569         }
 570         ll_lookup_finish_locks(it, dentry);
 571
 572         if (dentry == save)
 573                 GOTO(out, retval = NULL);
 574         else
 575                 GOTO(out, retval = dentry);
 576  out:
 577         if (req)
 578                 ptlrpc_req_finished(req);
 579         if (it->it_op == IT_GETATTR && (retval == NULL || retval == dentry))
 580                 ll_statahead_mark(parent, dentry);
 581         return retval;
 582 }
 583
 584 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 585                                    unsigned int flags)
 586 {
 587         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
 588         struct dentry *de;
 589
 590         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),flags=%u\n",
 591                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 592                parent->i_generation, parent, flags);
 593
 594         /* Optimize away (CREATE && !OPEN). Let .create handle the race. */
 595         if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN))
 596                 return NULL;
 597
 598         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
 599                 itp = NULL;
 600         else
 601                 itp = &it;
 602         de = ll_lookup_it(parent, dentry, itp, 0);
 603
 604         if (itp != NULL)
 605                 ll_intent_release(itp);
 606
 607         return de;
 608 }
 609
 610 /*
 611  * For cached negative dentry and new dentry, handle lookup/create/open
 612  * together.
 613  */
 614 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
 615                           struct file *file, unsigned open_flags,
 616                           umode_t mode, int *opened)
 617 {
 618         struct lookup_intent *it;
 619         struct dentry *de;
 620         long long lookup_flags = LOOKUP_OPEN;
 621         int rc = 0;
 622
 623         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),file %p,"
 624                            "open_flags %x,mode %x opened %d\n",
 625                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 626                dir->i_generation, dir, file, open_flags, mode, *opened);
 627
 628         OBD_ALLOC(it, sizeof(*it));
 629         if (!it)
 630                 return -ENOMEM;
 631
 632         it->it_op = IT_OPEN;
 633         if (open_flags & O_CREAT) {
 634                 it->it_op |= IT_CREAT;
 635                 lookup_flags |= LOOKUP_CREATE;
 636         }
 637         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
 638         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
 639
 640         /* Dentry added to dcache tree in ll_lookup_it */
 641         de = ll_lookup_it(dir, dentry, it, lookup_flags);
 642         if (IS_ERR(de))
 643                 rc = PTR_ERR(de);
 644         else if (de != NULL)
 645                 dentry = de;
 646
 647         if (!rc) {
 648                 if (it_disposition(it, DISP_OPEN_CREATE)) {
 649                         /* Dentry instantiated in ll_create_it. */
 650                         rc = ll_create_it(dir, dentry, mode, it);
 651                         if (rc) {
 652                                 /* We dget in ll_splice_alias. */
 653                                 if (de != NULL)
 654                                         dput(de);
 655                                 goto out_release;
 656                         }
 657
 658                         *opened |= FILE_CREATED;
 659                 }
 660                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
 661                         /* Open dentry. */
 662                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
 663                                 /* We cannot call open here as it would
 664                                  * deadlock.
 665                                  */
 666                                 if (it_disposition(it, DISP_ENQ_OPEN_REF))
 667                                         ptlrpc_req_finished(
 668                                                        (struct ptlrpc_request *)
 669                                                           it->d.lustre.it_data);
 670                                 rc = finish_no_open(file, de);
 671                         } else {
 672                                 file->private_data = it;
 673                                 rc = finish_open(file, dentry, NULL, opened);
 674                                 /* We dget in ll_splice_alias. finish_open takes
 675                                  * care of dget for fd open.
 676                                  */
 677                                 if (de != NULL)
 678                                         dput(de);
 679                         }
 680                 } else {
 681                         rc = finish_no_open(file, de);
 682                 }
 683         }
 684
 685 out_release:
 686         ll_intent_release(it);
 687         OBD_FREE(it, sizeof(*it));
 688
 689         return rc;
 690 }
 691
 692
 693 /* We depend on "mode" being set with the proper file type/umask by now */
 694 static struct inode *ll_create_node(struct inode *dir, const char *name,
 695                                     int namelen, const void *data, int datalen,
 696                                     int mode, __u64 extra,
 697                                     struct lookup_intent *it)
 698 {
 699         struct inode *inode = NULL;
 700         struct ptlrpc_request *request = NULL;
 701         struct ll_sb_info *sbi = ll_i2sbi(dir);
 702         int rc;
 703
 704         LASSERT(it && it->d.lustre.it_disposition);
 705
 706         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 707         request = it->d.lustre.it_data;
 708         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 709         rc = ll_prep_inode(&inode, request, dir->i_sb, it);
 710         if (rc)
 711                 GOTO(out, inode = ERR_PTR(rc));
 712
 713         LASSERT(ll_d_hlist_empty(&inode->i_dentry));
 714
 715         /* We asked for a lock on the directory, but were granted a
 716          * lock on the inode.  Since we finally have an inode pointer,
 717          * stuff it in the lock. */
 718         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 719                inode, inode->i_ino, inode->i_generation);
 720         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
 721  out:
 722         ptlrpc_req_finished(request);
 723         return inode;
 724 }
 725
 726 /*
 727  * By the time this is called, we already have created the directory cache
 728  * entry for the new file, but it is so far negative - it has no inode.
 729  *
 730  * We defer creating the OBD object(s) until open, to keep the intent and
 731  * non-intent code paths similar, and also because we do not have the MDS
 732  * inode number before calling ll_create_node() (which is needed for LOV),
 733  * so we would need to do yet another RPC to the MDS to store the LOV EA
 734  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 735  * lmm_size in datalen (the MDS still has code which will handle that).
 736  *
 737  * If the create succeeds, we fill in the inode information
 738  * with d_instantiate().
 739  */
 740 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 741                         struct lookup_intent *it)
 742 {
 743         struct inode *inode;
 744         int rc = 0;
 745
 746         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 747                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 748                dir->i_generation, dir, LL_IT2STR(it));
 749
 750         rc = it_open_error(DISP_OPEN_CREATE, it);
 751         if (rc)
 752                 return rc;
 753
 754         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 755                                NULL, 0, mode, 0, it);
 756         if (IS_ERR(inode))
 757                 return PTR_ERR(inode);
 758
 759         if (filename_is_volatile(dentry->d_name.name, dentry->d_name.len, NULL))
 760                 ll_i2info(inode)->lli_volatile = true;
 761
 762         d_instantiate(dentry, inode);
 763         return 0;
 764 }
 765
 766 static void ll_update_times(struct ptlrpc_request *request,
 767                             struct inode *inode)
 768 {
 769         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 770                                                        &RMF_MDT_BODY);
 771
 772         LASSERT(body);
 773         if (body->valid & OBD_MD_FLMTIME &&
 774             body->mtime > LTIME_S(inode->i_mtime)) {
 775                 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to "LPU64"\n",
 776                        inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
 777                 LTIME_S(inode->i_mtime) = body->mtime;
 778         }
 779         if (body->valid & OBD_MD_FLCTIME &&
 780             body->ctime > LTIME_S(inode->i_ctime))
 781                 LTIME_S(inode->i_ctime) = body->ctime;
 782 }
 783
 784 static int ll_new_node(struct inode *dir, struct qstr *name,
 785                        const char *tgt, int mode, int rdev,
 786                        struct dentry *dchild, __u32 opc)
 787 {
 788         struct ptlrpc_request *request = NULL;
 789         struct md_op_data *op_data;
 790         struct inode *inode = NULL;
 791         struct ll_sb_info *sbi = ll_i2sbi(dir);
 792         int tgt_len = 0;
 793         int err;
 794
 795         if (unlikely(tgt != NULL))
 796                 tgt_len = strlen(tgt) + 1;
 797
 798         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 799                                      name->len, 0, opc, NULL);
 800         if (IS_ERR(op_data))
 801                 GOTO(err_exit, err = PTR_ERR(op_data));
 802
 803         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 804                         from_kuid(&init_user_ns, current_fsuid()),
 805                         from_kgid(&init_user_ns, current_fsgid()),
 806                         cfs_curproc_cap_pack(), rdev, &request);
 807         ll_finish_md_op_data(op_data);
 808         if (err)
 809                 GOTO(err_exit, err);
 810
 811         ll_update_times(request, dir);
 812
 813         if (dchild) {
 814                 err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
 815                 if (err)
 816                      GOTO(err_exit, err);
 817
 818                 d_instantiate(dchild, inode);
 819         }
 820 err_exit:
 821         ptlrpc_req_finished(request);
 822
 823         return err;
 824 }
 825
 826 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 827                             unsigned rdev, struct dentry *dchild)
 828 {
 829         int err;
 830
 831         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 832                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 833                mode, rdev);
 834
 835         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
 836                 mode &= ~current_umask();
 837
 838         switch (mode & S_IFMT) {
 839         case 0:
 840                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 841         case S_IFREG:
 842         case S_IFCHR:
 843         case S_IFBLK:
 844         case S_IFIFO:
 845         case S_IFSOCK:
 846                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 847                                   LUSTRE_OPC_MKNOD);
 848                 break;
 849         case S_IFDIR:
 850                 err = -EPERM;
 851                 break;
 852         default:
 853                 err = -EINVAL;
 854         }
 855
 856         if (!err)
 857                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
 858
 859         return err;
 860 }
 861
 862 /*
 863  * Plain create. Intent create is handled in atomic_open.
 864  */
 865 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 866                         umode_t mode, bool want_excl)
 867 {
 868         int rc;
 869
 870         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),"
 871                            "flags=%u, excl=%d\n",
 872                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 873                dir->i_generation, dir, mode, want_excl);
 874
 875         rc = ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 876
 877         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
 878
 879         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
 880                dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
 881
 882         return rc;
 883 }
 884
 885 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 886                               const char *tgt, struct dentry *dchild)
 887 {
 888         int err;
 889
 890         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 891                name->len, name->name, dir->i_ino, dir->i_generation,
 892                dir, 3000, tgt);
 893
 894         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 895                           0, dchild, LUSTRE_OPC_SYMLINK);
 896
 897         if (!err)
 898                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
 899
 900         return err;
 901 }
 902
 903 static int ll_link_generic(struct inode *src,  struct inode *dir,
 904                            struct qstr *name, struct dentry *dchild)
 905 {
 906         struct ll_sb_info *sbi = ll_i2sbi(dir);
 907         struct ptlrpc_request *request = NULL;
 908         struct md_op_data *op_data;
 909         int err;
 910
 911         CDEBUG(D_VFSTRACE,
 912                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
 913                src->i_ino, src->i_generation, src, dir->i_ino,
 914                dir->i_generation, dir, name->len, name->name);
 915
 916         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
 917                                      0, LUSTRE_OPC_ANY, NULL);
 918         if (IS_ERR(op_data))
 919                 return PTR_ERR(op_data);
 920
 921         err = md_link(sbi->ll_md_exp, op_data, &request);
 922         ll_finish_md_op_data(op_data);
 923         if (err)
 924                 GOTO(out, err);
 925
 926         ll_update_times(request, dir);
 927         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
 928 out:
 929         ptlrpc_req_finished(request);
 930         return err;
 931 }
 932
 933 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
 934                             int mode, struct dentry *dchild)
 935
 936 {
 937         int err;
 938
 939         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 940                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 941
 942         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
 943                 mode &= ~current_umask();
 944         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
 945         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
 946
 947         if (!err)
 948                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
 949
 950         return err;
 951 }
 952
 953 /* Try to find the child dentry by its name.
 954    If found, put the result fid into @fid. */
 955 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
 956                              struct lu_fid *fid)
 957 {
 958         struct dentry *parent, *child;
 959
 960         parent = ll_d_hlist_entry(dir->i_dentry, struct dentry, d_alias);
 961         child = d_lookup(parent, name);
 962         if (child) {
 963                 if (child->d_inode)
 964                         *fid = *ll_inode2fid(child->d_inode);
 965                 dput(child);
 966         }
 967 }
 968
 969 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
 970                             struct dentry *dchild, struct qstr *name)
 971 {
 972         struct ptlrpc_request *request = NULL;
 973         struct md_op_data *op_data;
 974         int rc;
 975
 976         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 977                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 978
 979         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
 980                 return -EBUSY;
 981
 982         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
 983                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
 984         if (IS_ERR(op_data))
 985                 return PTR_ERR(op_data);
 986
 987         ll_get_child_fid(dir, name, &op_data->op_fid3);
 988         op_data->op_fid2 = op_data->op_fid3;
 989         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
 990         ll_finish_md_op_data(op_data);
 991         if (rc == 0) {
 992                 ll_update_times(request, dir);
 993                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
 994         }
 995
 996         ptlrpc_req_finished(request);
 997         return rc;
 998 }
 999
1000 /**
1001  * Remove dir entry
1002  **/
1003 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1004 {
1005         struct ptlrpc_request *request = NULL;
1006         struct md_op_data *op_data;
1007         int rc;
1008
1009         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1010                namelen, name, dir->i_ino, dir->i_generation, dir);
1011
1012         op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1013                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1014         if (IS_ERR(op_data))
1015                 return PTR_ERR(op_data);
1016         op_data->op_cli_flags |= CLI_RM_ENTRY;
1017         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1018         ll_finish_md_op_data(op_data);
1019         if (rc == 0) {
1020                 ll_update_times(request, dir);
1021                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1022         }
1023
1024         ptlrpc_req_finished(request);
1025         return rc;
1026 }
1027
1028 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1029 {
1030         struct mdt_body *body;
1031         struct lov_mds_md *eadata;
1032         struct lov_stripe_md *lsm = NULL;
1033         struct obd_trans_info oti = { 0 };
1034         struct obdo *oa;
1035         struct obd_capa *oc = NULL;
1036         int rc;
1037
1038         /* req is swabbed so this is safe */
1039         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1040         if (!(body->valid & OBD_MD_FLEASIZE))
1041                 return 0;
1042
1043         if (body->eadatasize == 0) {
1044                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1045                 GOTO(out, rc = -EPROTO);
1046         }
1047
1048         /* The MDS sent back the EA because we unlinked the last reference
1049          * to this file. Use this EA to unlink the objects on the OST.
1050          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1051          * check it is complete and sensible. */
1052         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1053                                               body->eadatasize);
1054         LASSERT(eadata != NULL);
1055
1056         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1057         if (rc < 0) {
1058                 CERROR("obd_unpackmd: %d\n", rc);
1059                 GOTO(out, rc);
1060         }
1061         LASSERT(rc >= sizeof(*lsm));
1062
1063         OBDO_ALLOC(oa);
1064         if (oa == NULL)
1065                 GOTO(out_free_memmd, rc = -ENOMEM);
1066
1067         oa->o_oi = lsm->lsm_oi;
1068         oa->o_mode = body->mode & S_IFMT;
1069         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1070
1071         if (body->valid & OBD_MD_FLCOOKIE) {
1072                 oa->o_valid |= OBD_MD_FLCOOKIE;
1073                 oti.oti_logcookies =
1074                         req_capsule_server_sized_get(&request->rq_pill,
1075                                                      &RMF_LOGCOOKIES,
1076                                                    sizeof(struct llog_cookie) *
1077                                                      lsm->lsm_stripe_count);
1078                 if (oti.oti_logcookies == NULL) {
1079                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1080                         body->valid &= ~OBD_MD_FLCOOKIE;
1081                 }
1082         }
1083
1084         if (body->valid & OBD_MD_FLOSSCAPA) {
1085                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1086                 if (rc)
1087                         GOTO(out_free_memmd, rc);
1088         }
1089
1090         rc = obd_destroy(NULL, ll_i2dtexp(dir), oa, lsm, &oti,
1091                          ll_i2mdexp(dir), oc);
1092         capa_put(oc);
1093         if (rc)
1094                 CERROR("obd destroy objid "DOSTID" error %d\n",
1095                        POSTID(&lsm->lsm_oi), rc);
1096 out_free_memmd:
1097         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1098         OBDO_FREE(oa);
1099 out:
1100         return rc;
1101 }
1102
1103 /* ll_unlink_generic() doesn't update the inode with the new link count.
1104  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
1105  * is any lock existing. They will recycle dentries and inodes based upon locks
1106  * too. b=20433 */
1107 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1108                              struct dentry *dchild, struct qstr *name)
1109 {
1110         struct ptlrpc_request *request = NULL;
1111         struct md_op_data *op_data;
1112         int rc;
1113         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1114                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1115
1116         /*
1117          * XXX: unlink bind mountpoint maybe call to here,
1118          * just check it as vfs_unlink does.
1119          */
1120         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1121                 return -EBUSY;
1122
1123         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1124                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1125         if (IS_ERR(op_data))
1126                 return PTR_ERR(op_data);
1127
1128         ll_get_child_fid(dir, name, &op_data->op_fid3);
1129         op_data->op_fid2 = op_data->op_fid3;
1130         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1131         ll_finish_md_op_data(op_data);
1132         if (rc)
1133                 GOTO(out, rc);
1134
1135         ll_update_times(request, dir);
1136         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1137
1138         rc = ll_objects_destroy(request, dir);
1139  out:
1140         ptlrpc_req_finished(request);
1141         return rc;
1142 }
1143
1144 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1145                              struct dentry *src_dchild, struct qstr *src_name,
1146                              struct inode *tgt, struct dentry *tgt_dparent,
1147                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1148 {
1149         struct ptlrpc_request *request = NULL;
1150         struct ll_sb_info *sbi = ll_i2sbi(src);
1151         struct md_op_data *op_data;
1152         int err;
1153
1154         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1155                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1156                src->i_ino, src->i_generation, src, tgt_name->len,
1157                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1158
1159         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1160             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1161                 return -EBUSY;
1162
1163         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1164                                      LUSTRE_OPC_ANY, NULL);
1165         if (IS_ERR(op_data))
1166                 return PTR_ERR(op_data);
1167
1168         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1169         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1170         err = md_rename(sbi->ll_md_exp, op_data,
1171                         src_name->name, src_name->len,
1172                         tgt_name->name, tgt_name->len, &request);
1173         ll_finish_md_op_data(op_data);
1174         if (!err) {
1175                 ll_update_times(request, src);
1176                 ll_update_times(request, tgt);
1177                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1178                 err = ll_objects_destroy(request, src);
1179         }
1180
1181         ptlrpc_req_finished(request);
1182
1183         return err;
1184 }
1185
1186 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1187                     dev_t rdev)
1188 {
1189         return ll_mknod_generic(dir, &dchild->d_name, mode,
1190                                 old_encode_dev(rdev), dchild);
1191 }
1192
1193 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1194 {
1195         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1196 }
1197
1198 static int ll_mkdir(struct inode *dir, struct dentry *dentry, ll_umode_t mode)
1199 {
1200         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1201 }
1202
1203 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1204 {
1205         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1206 }
1207
1208 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1209                       const char *oldname)
1210 {
1211         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1212 }
1213
1214 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1215                    struct dentry *new_dentry)
1216 {
1217         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1218                                new_dentry);
1219 }
1220
1221 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1222                      struct inode *new_dir, struct dentry *new_dentry)
1223 {
1224         int err;
1225         err = ll_rename_generic(old_dir, NULL,
1226                                  old_dentry, &old_dentry->d_name,
1227                                  new_dir, NULL, new_dentry,
1228                                  &new_dentry->d_name);
1229         if (!err) {
1230                         d_move(old_dentry, new_dentry);
1231         }
1232         return err;
1233 }
1234
1235 struct inode_operations ll_dir_inode_operations = {
1236         .mknod        = ll_mknod,
1237         .atomic_open        = ll_atomic_open,
1238         .lookup      = ll_lookup_nd,
1239         .create      = ll_create_nd,
1240         /* We need all these non-raw things for NFSD, to not patch it. */
1241         .unlink      = ll_unlink,
1242         .mkdir        = ll_mkdir,
1243         .rmdir        = ll_rmdir,
1244         .symlink            = ll_symlink,
1245         .link          = ll_link,
1246         .rename      = ll_rename,
1247         .setattr            = ll_setattr,
1248         .getattr            = ll_getattr,
1249         .permission      = ll_inode_permission,
1250         .setxattr          = ll_setxattr,
1251         .getxattr          = ll_getxattr,
1252         .listxattr        = ll_listxattr,
1253         .removexattr    = ll_removexattr,
1254         .get_acl            = ll_get_acl,
1255 };
1256
1257 struct inode_operations ll_special_inode_operations = {
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         .get_acl            = ll_get_acl,
1266 };