lustre/llite/namei.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #include <linux/fs.h>
  38 #include <linux/sched.h>
  39 #include <linux/mm.h>
  40 #include <linux/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 /*
  55  * Check if we have something mounted at the named dchild.
  56  * In such a case there would always be dentry present.
  57  */
  58 static int ll_d_mountpoint(struct dentry *dparent, struct dentry *dchild,
  59                            struct qstr *name)
  60 {
  61         int mounted = 0;
  62
  63         if (unlikely(dchild)) {
  64                 mounted = d_mountpoint(dchild);
  65         } else if (dparent) {
  66                 dchild = d_lookup(dparent, name);
  67                 if (dchild) {
  68                         mounted = d_mountpoint(dchild);
  69                         dput(dchild);
  70                 }
  71         }
  72         return mounted;
  73 }
  74
  75 int ll_unlock(__u32 mode, struct lustre_handle *lockh)
  76 {
  77         ENTRY;
  78
  79         ldlm_lock_decref(lockh, mode);
  80
  81         RETURN(0);
  82 }
  83
  84
  85 /* called from iget5_locked->find_inode() under inode_lock spinlock */
  86 static int ll_test_inode(struct inode *inode, void *opaque)
  87 {
  88         struct ll_inode_info *lli = ll_i2info(inode);
  89         struct lustre_md     *md = opaque;
  90
  91         if (unlikely(!(md->body->valid & OBD_MD_FLID))) {
  92                 CERROR("MDS body missing FID\n");
  93                 return 0;
  94         }
  95
  96         if (!lu_fid_eq(&lli->lli_fid, &md->body->fid1))
  97                 return 0;
  98
  99         return 1;
 100 }
 101
 102 static int ll_set_inode(struct inode *inode, void *opaque)
 103 {
 104         struct ll_inode_info *lli = ll_i2info(inode);
 105         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
 106
 107         if (unlikely(!(body->valid & OBD_MD_FLID))) {
 108                 CERROR("MDS body missing FID\n");
 109                 return -EINVAL;
 110         }
 111
 112         lli->lli_fid = body->fid1;
 113         if (unlikely(!(body->valid & OBD_MD_FLTYPE))) {
 114                 CERROR("Can not initialize inode "DFID" without object type: "
 115                        "valid = "LPX64"\n", PFID(&lli->lli_fid), body->valid);
 116                 return -EINVAL;
 117         }
 118
 119         inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mode & S_IFMT);
 120         if (unlikely(inode->i_mode == 0)) {
 121                 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
 122                 return -EINVAL;
 123         }
 124
 125         ll_lli_init(lli);
 126
 127         return 0;
 128 }
 129
 130
 131 /*
 132  * Get an inode by inode number (already instantiated by the intent lookup).
 133  * Returns inode or NULL
 134  */
 135 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 136                       struct lustre_md *md)
 137 {
 138         struct inode         *inode;
 139         ENTRY;
 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                                 rc = cl_file_inode_init(inode, md);
 152                         if (rc != 0) {
 153                                 md->lsm = NULL;
 154                                 make_bad_inode(inode);
 155                                 unlock_new_inode(inode);
 156                                 iput(inode);
 157                                 inode = ERR_PTR(rc);
 158                         } else
 159                                 unlock_new_inode(inode);
 160                 } else if (!(inode->i_state & (I_FREEING | I_CLEAR)))
 161                         ll_update_inode(inode, md);
 162                 CDEBUG(D_VFSTRACE, "got inode: %p for "DFID"\n",
 163                        inode, PFID(&md->body->fid1));
 164         }
 165         RETURN(inode);
 166 }
 167
 168 static void ll_invalidate_negative_children(struct inode *dir)
 169 {
 170         struct dentry *dentry, *tmp_subdir;
 171
 172         ll_lock_dcache(dir);
 173         list_for_each_entry(dentry, &dir->i_dentry, d_alias) {
 174                 spin_lock(&dentry->d_lock);
 175                 if (!list_empty(&dentry->d_subdirs)) {
 176                         struct dentry *child;
 177
 178                         list_for_each_entry_safe(child, tmp_subdir,
 179                                                  &dentry->d_subdirs,
 180                                                  d_child) {
 181                                 if (child->d_inode == NULL)
 182                                         d_lustre_invalidate(child);
 183                         }
 184                 }
 185                 spin_unlock(&dentry->d_lock);
 186         }
 187         ll_unlock_dcache(dir);
 188 }
 189
 190 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 191                        void *data, int flag)
 192 {
 193         int rc;
 194         struct lustre_handle lockh;
 195         ENTRY;
 196
 197         switch (flag) {
 198         case LDLM_CB_BLOCKING:
 199                 ldlm_lock2handle(lock, &lockh);
 200                 rc = ldlm_cli_cancel(&lockh);
 201                 if (rc < 0) {
 202                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 203                         RETURN(rc);
 204                 }
 205                 break;
 206         case LDLM_CB_CANCELING: {
 207                 struct inode *inode = ll_inode_from_lock(lock);
 208                 struct ll_inode_info *lli;
 209                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 210                 struct lu_fid *fid;
 211                 ldlm_mode_t mode = lock->l_req_mode;
 212
 213                 /* Invalidate all dentries associated with this inode */
 214                 if (inode == NULL)
 215                         break;
 216
 217                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
 218                 /* For OPEN locks we differentiate between lock modes
 219                  * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
 220                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
 221                             MDS_INODELOCK_LAYOUT))
 222                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
 223
 224                 if (bits & MDS_INODELOCK_OPEN)
 225                         ll_have_md_lock(inode, &bits, mode);
 226
 227                 fid = ll_inode2fid(inode);
 228                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
 229                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
 230                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
 231                         LDLM_ERROR(lock, "data mismatch with object "
 232                                    DFID" (%p)", PFID(fid), inode);
 233                 }
 234
 235                 if (bits & MDS_INODELOCK_OPEN) {
 236                         int flags = 0;
 237                         switch (lock->l_req_mode) {
 238                         case LCK_CW:
 239                                 flags = FMODE_WRITE;
 240                                 break;
 241                         case LCK_PR:
 242                                 flags = FMODE_EXEC;
 243                                 break;
 244                         case LCK_CR:
 245                                 flags = FMODE_READ;
 246                                 break;
 247                         default:
 248                                 CERROR("Unexpected lock mode for OPEN lock "
 249                                        "%d, inode %ld\n", lock->l_req_mode,
 250                                        inode->i_ino);
 251                         }
 252                         ll_md_real_close(inode, flags);
 253                 }
 254
 255                 lli = ll_i2info(inode);
 256                 if (bits & MDS_INODELOCK_LAYOUT) {
 257                         struct cl_object_conf conf = { .coc_inode = inode,
 258                                                        .coc_invalidate = true };
 259                         rc = ll_layout_conf(inode, &conf);
 260                         if (rc)
 261                                 CDEBUG(D_INODE, "invaliding layout %d.\n", rc);
 262                 }
 263
 264                 if (bits & MDS_INODELOCK_UPDATE)
 265                         lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 266
 267                 if (S_ISDIR(inode->i_mode) &&
 268                      (bits & MDS_INODELOCK_UPDATE)) {
 269                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 270                                inode->i_ino);
 271                         truncate_inode_pages(inode->i_mapping, 0);
 272                         ll_invalidate_negative_children(inode);
 273                 }
 274
 275                 if (inode->i_sb->s_root &&
 276                     inode != inode->i_sb->s_root->d_inode &&
 277                     (bits & MDS_INODELOCK_LOOKUP))
 278                         ll_invalidate_aliases(inode);
 279                 iput(inode);
 280                 break;
 281         }
 282         default:
 283                 LBUG();
 284         }
 285
 286         RETURN(0);
 287 }
 288
 289 __u32 ll_i2suppgid(struct inode *i)
 290 {
 291         if (cfs_curproc_is_in_groups(i->i_gid))
 292                 return (__u32)i->i_gid;
 293         else
 294                 return (__u32)(-1);
 295 }
 296
 297 /* Pack the required supplementary groups into the supplied groups array.
 298  * If we don't need to use the groups from the target inode(s) then we
 299  * instead pack one or more groups from the user's supplementary group
 300  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 301 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 302 {
 303 #if 0
 304         int i;
 305 #endif
 306
 307         LASSERT(i1 != NULL);
 308         LASSERT(suppgids != NULL);
 309
 310         suppgids[0] = ll_i2suppgid(i1);
 311
 312         if (i2)
 313                 suppgids[1] = ll_i2suppgid(i2);
 314                 else
 315                         suppgids[1] = -1;
 316
 317 #if 0
 318         for (i = 0; i < current_ngroups; i++) {
 319                 if (suppgids[0] == -1) {
 320                         if (current_groups[i] != suppgids[1])
 321                                 suppgids[0] = current_groups[i];
 322                         continue;
 323                 }
 324                 if (suppgids[1] == -1) {
 325                         if (current_groups[i] != suppgids[0])
 326                                 suppgids[1] = current_groups[i];
 327                         continue;
 328                 }
 329                 break;
 330         }
 331 #endif
 332 }
 333
 334 /*
 335  * try to reuse three types of dentry:
 336  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
 337  *    by concurrent .revalidate).
 338  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
 339  *    be cleared by others calling d_lustre_revalidate).
 340  * 3. DISCONNECTED alias.
 341  */
 342 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
 343 {
 344         struct dentry *alias, *discon_alias, *invalid_alias;
 345
 346         if (list_empty(&inode->i_dentry))
 347                 return NULL;
 348
 349         discon_alias = invalid_alias = NULL;
 350
 351         ll_lock_dcache(inode);
 352         list_for_each_entry(alias, &inode->i_dentry, d_alias) {
 353                 LASSERT(alias != dentry);
 354
 355                 spin_lock(&alias->d_lock);
 356                 if (alias->d_flags & DCACHE_DISCONNECTED)
 357                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
 358                         discon_alias = alias;
 359                 else if (alias->d_parent == dentry->d_parent             &&
 360                          alias->d_name.hash == dentry->d_name.hash       &&
 361                          alias->d_name.len == dentry->d_name.len         &&
 362                          memcmp(alias->d_name.name, dentry->d_name.name,
 363                                 dentry->d_name.len) == 0)
 364                         invalid_alias = alias;
 365                 spin_unlock(&alias->d_lock);
 366
 367                 if (invalid_alias)
 368                         break;
 369         }
 370         alias = invalid_alias ?: discon_alias ?: NULL;
 371         if (alias) {
 372                 spin_lock(&alias->d_lock);
 373                 dget_dlock(alias);
 374                 spin_unlock(&alias->d_lock);
 375         }
 376         ll_unlock_dcache(inode);
 377
 378         return alias;
 379 }
 380
 381 /*
 382  * Similar to d_splice_alias(), but lustre treats DCACHE_LUSTRE_INVALID alias
 383  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
 384  */
 385 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
 386 {
 387         struct dentry *new;
 388
 389         if (inode) {
 390                 new = ll_find_alias(inode, de);
 391                 if (new) {
 392                         ll_dops_init(new, 1, 1);
 393                         d_move(new, de);
 394                         iput(inode);
 395                         CDEBUG(D_DENTRY,
 396                                "Reuse dentry %p inode %p refc %d flags %#x\n",
 397                               new, new->d_inode, d_refcount(new), new->d_flags);
 398                         return new;
 399                 }
 400         }
 401         __d_lustre_invalidate(de);
 402         ll_dops_init(de, 1, 1);
 403         d_add(de, inode);
 404         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
 405                de, de->d_inode, d_refcount(de), de->d_flags);
 406         return de;
 407 }
 408
 409 int ll_lookup_it_finish(struct ptlrpc_request *request,
 410                         struct lookup_intent *it, void *data)
 411 {
 412         struct it_cb_data *icbd = data;
 413         struct dentry **de = icbd->icbd_childp;
 414         struct inode *parent = icbd->icbd_parent;
 415         struct inode *inode = NULL;
 416         __u64 bits = 0;
 417         int rc;
 418         ENTRY;
 419
 420         /* NB 1 request reference will be taken away by ll_intent_lock()
 421          * when I return */
 422         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 423                 rc = ll_prep_inode(&inode, request, (*de)->d_sb);
 424                 if (rc)
 425                         RETURN(rc);
 426
 427                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
 428
 429                 /* We used to query real size from OSTs here, but actually
 430                    this is not needed. For stat() calls size would be updated
 431                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 432                    2.4 and
 433                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 434                    Everybody else who needs correct file size would call
 435                    ll_glimpse_size or some equivalent themselves anyway.
 436                    Also see bug 7198. */
 437         }
 438
 439         *de = ll_splice_alias(inode, *de);
 440
 441         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 442                 /* we have lookup look - unhide dentry */
 443                 if (bits & MDS_INODELOCK_LOOKUP)
 444                         d_lustre_revalidate(*de);
 445         } else {
 446                 /* Check that parent has UPDATE lock. */
 447                 struct lookup_intent parent_it = {
 448                                         .it_op = IT_GETATTR,
 449                                         .d.lustre.it_lock_handle = 0 };
 450
 451                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it,
 452                                        &ll_i2info(parent)->lli_fid, NULL)) {
 453                         d_lustre_revalidate(*de);
 454                         ll_intent_release(&parent_it);
 455                 }
 456         }
 457
 458         RETURN(0);
 459 }
 460
 461 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 462                                    struct lookup_intent *it, int lookup_flags)
 463 {
 464         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 465         struct dentry *save = dentry, *retval;
 466         struct ptlrpc_request *req = NULL;
 467         struct md_op_data *op_data;
 468         struct it_cb_data icbd;
 469         __u32 opc;
 470         int rc;
 471         ENTRY;
 472
 473         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 474                 RETURN(ERR_PTR(-ENAMETOOLONG));
 475
 476         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 477                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 478                parent->i_generation, parent, LL_IT2STR(it));
 479
 480         if (d_mountpoint(dentry))
 481                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 482
 483         ll_frob_intent(&it, &lookup_it);
 484
 485         /* As do_lookup is called before follow_mount, root dentry may be left
 486          * not valid, revalidate it here. */
 487         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 488             (it->it_op & (IT_OPEN | IT_CREAT))) {
 489                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it,
 490                                             MDS_INODELOCK_LOOKUP);
 491                 if (rc)
 492                         RETURN(ERR_PTR(rc));
 493         }
 494
 495         if (it->it_op == IT_GETATTR) {
 496                 rc = ll_statahead_enter(parent, &dentry, 0);
 497                 if (rc == 1) {
 498                         if (dentry == save)
 499                                 GOTO(out, retval = NULL);
 500                         GOTO(out, retval = dentry);
 501                 }
 502         }
 503
 504         icbd.icbd_childp = &dentry;
 505         icbd.icbd_parent = parent;
 506
 507         if (it->it_op & IT_CREAT ||
 508             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 509                 opc = LUSTRE_OPC_CREATE;
 510         else
 511                 opc = LUSTRE_OPC_ANY;
 512
 513         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 514                                      dentry->d_name.len, lookup_flags, opc,
 515                                      NULL);
 516         if (IS_ERR(op_data))
 517                 RETURN((void *)op_data);
 518
 519         it->it_create_mode &= ~cfs_curproc_umask();
 520
 521         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 522                             lookup_flags, &req, ll_md_blocking_ast, 0);
 523         ll_finish_md_op_data(op_data);
 524         if (rc < 0)
 525                 GOTO(out, retval = ERR_PTR(rc));
 526
 527         rc = ll_lookup_it_finish(req, it, &icbd);
 528         if (rc != 0) {
 529                 ll_intent_release(it);
 530                 GOTO(out, retval = ERR_PTR(rc));
 531         }
 532
 533         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 534             !S_ISREG(dentry->d_inode->i_mode) &&
 535             !S_ISDIR(dentry->d_inode->i_mode)) {
 536                 ll_release_openhandle(dentry, it);
 537         }
 538         ll_lookup_finish_locks(it, dentry);
 539
 540         if (dentry == save)
 541                 GOTO(out, retval = NULL);
 542         else
 543                 GOTO(out, retval = dentry);
 544  out:
 545         if (req)
 546                 ptlrpc_req_finished(req);
 547         if (it->it_op == IT_GETATTR && (retval == NULL || retval == dentry))
 548                 ll_statahead_mark(parent, dentry);
 549         return retval;
 550 }
 551
 552 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 553                                         int lookup_flags)
 554 {
 555         struct lookup_intent *it;
 556
 557         OBD_ALLOC(it, sizeof(*it));
 558         if (!it)
 559                 return ERR_PTR(-ENOMEM);
 560
 561         if (lookup_flags & LOOKUP_OPEN) {
 562                 it->it_op = IT_OPEN;
 563                 if (lookup_flags & LOOKUP_CREATE)
 564                         it->it_op |= IT_CREAT;
 565                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
 566                 it->it_flags = oit->flags;
 567         } else {
 568                 it->it_op = IT_GETATTR;
 569         }
 570
 571         return it;
 572 }
 573
 574 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 575                                    struct nameidata *nd)
 576 {
 577         struct dentry *de;
 578         ENTRY;
 579
 580         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 581                 struct lookup_intent *it;
 582
 583 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
 584                 /* Did we came here from failed revalidate just to propagate
 585                  * its error? */
 586                 if (nd->flags & LOOKUP_OPEN)
 587                         if (IS_ERR(nd->intent.open.file))
 588                                 RETURN((struct dentry *)nd->intent.open.file);
 589 #endif
 590                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 591                         it = ll_d2d(dentry)->lld_it;
 592                         ll_d2d(dentry)->lld_it = NULL;
 593                 } else {
 594                         if ((nd->flags & LOOKUP_CREATE ) && !(nd->flags & LOOKUP_OPEN)) {
 595                                 /* We are sure this is new dentry, so we need to create
 596                                    our private data and set the dentry ops */
 597                                 ll_dops_init(dentry, 1, 1);
 598                                 __d_lustre_invalidate(dentry);
 599                                 d_add(dentry, NULL);
 600                                 RETURN(NULL);
 601                         }
 602                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 603                         if (IS_ERR(it))
 604                                 RETURN((struct dentry *)it);
 605                 }
 606
 607                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 608                 if (de)
 609                         dentry = de;
 610                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 611                         if (dentry->d_inode &&
 612                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 613                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 614                                         // We cannot call open here as it would
 615                                         // deadlock.
 616                                         ptlrpc_req_finished(
 617                                                        (struct ptlrpc_request *)
 618                                                           it->d.lustre.it_data);
 619                                 } else {
 620                                         struct file *filp;
 621
 622                                         nd->intent.open.file->private_data = it;
 623                                         filp = lookup_instantiate_filp(nd,
 624                                                                        dentry,
 625                                                                        NULL);
 626                                         if (IS_ERR(filp)) {
 627                                                 if (de)
 628                                                         dput(de);
 629                                                 de = (struct dentry *)filp;
 630                                         }
 631                                 }
 632                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 633                                 // XXX This can only reliably work on assumption
 634                                 // that there are NO hashed negative dentries.
 635                                 ll_d2d(dentry)->lld_it = it;
 636                                 it = NULL; /* Will be freed in ll_create_nd */
 637                                 /* We absolutely depend on ll_create_nd to be
 638                                  * called to not leak this intent and possible
 639                                  * data attached to it */
 640                         }
 641                 }
 642
 643                 if (it) {
 644                         ll_intent_release(it);
 645                         OBD_FREE(it, sizeof(*it));
 646                 }
 647         } else {
 648                 de = ll_lookup_it(parent, dentry, NULL, 0);
 649         }
 650
 651         RETURN(de);
 652 }
 653
 654 /* We depend on "mode" being set with the proper file type/umask by now */
 655 static struct inode *ll_create_node(struct inode *dir, const char *name,
 656                                     int namelen, const void *data, int datalen,
 657                                     int mode, __u64 extra,
 658                                     struct lookup_intent *it)
 659 {
 660         struct inode *inode = NULL;
 661         struct ptlrpc_request *request = NULL;
 662         struct ll_sb_info *sbi = ll_i2sbi(dir);
 663         int rc;
 664         ENTRY;
 665
 666         LASSERT(it && it->d.lustre.it_disposition);
 667
 668         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 669         request = it->d.lustre.it_data;
 670         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 671         rc = ll_prep_inode(&inode, request, dir->i_sb);
 672         if (rc)
 673                 GOTO(out, inode = ERR_PTR(rc));
 674
 675         LASSERT(list_empty(&inode->i_dentry));
 676
 677         /* We asked for a lock on the directory, but were granted a
 678          * lock on the inode.  Since we finally have an inode pointer,
 679          * stuff it in the lock. */
 680         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 681                inode, inode->i_ino, inode->i_generation);
 682         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
 683         EXIT;
 684  out:
 685         ptlrpc_req_finished(request);
 686         return inode;
 687 }
 688
 689 /*
 690  * By the time this is called, we already have created the directory cache
 691  * entry for the new file, but it is so far negative - it has no inode.
 692  *
 693  * We defer creating the OBD object(s) until open, to keep the intent and
 694  * non-intent code paths similar, and also because we do not have the MDS
 695  * inode number before calling ll_create_node() (which is needed for LOV),
 696  * so we would need to do yet another RPC to the MDS to store the LOV EA
 697  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 698  * lmm_size in datalen (the MDS still has code which will handle that).
 699  *
 700  * If the create succeeds, we fill in the inode information
 701  * with d_instantiate().
 702  */
 703 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 704                         struct lookup_intent *it)
 705 {
 706         struct inode *inode;
 707         int rc = 0;
 708         ENTRY;
 709
 710         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 711                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 712                dir->i_generation, dir, LL_IT2STR(it));
 713
 714         rc = it_open_error(DISP_OPEN_CREATE, it);
 715         if (rc)
 716                 RETURN(rc);
 717
 718         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 719                                NULL, 0, mode, 0, it);
 720         if (IS_ERR(inode))
 721                 RETURN(PTR_ERR(inode));
 722
 723         d_instantiate(dentry, inode);
 724         RETURN(0);
 725 }
 726
 727 static void ll_update_times(struct ptlrpc_request *request,
 728                             struct inode *inode)
 729 {
 730         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 731                                                        &RMF_MDT_BODY);
 732
 733         LASSERT(body);
 734         if (body->valid & OBD_MD_FLMTIME &&
 735             body->mtime > LTIME_S(inode->i_mtime)) {
 736                 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to "LPU64"\n",
 737                        inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
 738                 LTIME_S(inode->i_mtime) = body->mtime;
 739         }
 740         if (body->valid & OBD_MD_FLCTIME &&
 741             body->ctime > LTIME_S(inode->i_ctime))
 742                 LTIME_S(inode->i_ctime) = body->ctime;
 743 }
 744
 745 static int ll_new_node(struct inode *dir, struct qstr *name,
 746                        const char *tgt, int mode, int rdev,
 747                        struct dentry *dchild, __u32 opc)
 748 {
 749         struct ptlrpc_request *request = NULL;
 750         struct md_op_data *op_data;
 751         struct inode *inode = NULL;
 752         struct ll_sb_info *sbi = ll_i2sbi(dir);
 753         int tgt_len = 0;
 754         int err;
 755
 756         ENTRY;
 757         if (unlikely(tgt != NULL))
 758                 tgt_len = strlen(tgt) + 1;
 759
 760         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 761                                      name->len, 0, opc, NULL);
 762         if (IS_ERR(op_data))
 763                 GOTO(err_exit, err = PTR_ERR(op_data));
 764
 765         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 766                         cfs_curproc_fsuid(), cfs_curproc_fsgid(),
 767                         cfs_curproc_cap_pack(), rdev, &request);
 768         ll_finish_md_op_data(op_data);
 769         if (err)
 770                 GOTO(err_exit, err);
 771
 772         ll_update_times(request, dir);
 773
 774         if (dchild) {
 775                 err = ll_prep_inode(&inode, request, dchild->d_sb);
 776                 if (err)
 777                      GOTO(err_exit, err);
 778
 779                 d_instantiate(dchild, inode);
 780         }
 781         EXIT;
 782 err_exit:
 783         ptlrpc_req_finished(request);
 784
 785         return err;
 786 }
 787
 788 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 789                             unsigned rdev, struct dentry *dchild)
 790 {
 791         int err;
 792         ENTRY;
 793
 794         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 795                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 796                mode, rdev);
 797
 798         mode &= ~cfs_curproc_umask();
 799
 800         switch (mode & S_IFMT) {
 801         case 0:
 802                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 803         case S_IFREG:
 804         case S_IFCHR:
 805         case S_IFBLK:
 806         case S_IFIFO:
 807         case S_IFSOCK:
 808                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 809                                   LUSTRE_OPC_MKNOD);
 810                 break;
 811         case S_IFDIR:
 812                 err = -EPERM;
 813                 break;
 814         default:
 815                 err = -EINVAL;
 816         }
 817
 818         if (!err)
 819                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
 820
 821         RETURN(err);
 822 }
 823
 824 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 825                         int mode, struct nameidata *nd)
 826 {
 827         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 828         int rc;
 829
 830         if (!it)
 831                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 832
 833         ll_d2d(dentry)->lld_it = NULL;
 834
 835         /* Was there an error? Propagate it! */
 836         if (it->d.lustre.it_status) {
 837                 rc = it->d.lustre.it_status;
 838                 goto out;
 839         }
 840
 841         rc = ll_create_it(dir, dentry, mode, it);
 842         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 843                 struct file *filp;
 844
 845                 nd->intent.open.file->private_data = it;
 846                 filp = lookup_instantiate_filp(nd, dentry, NULL);
 847                 if (IS_ERR(filp))
 848                         rc = PTR_ERR(filp);
 849         }
 850
 851 out:
 852         ll_intent_release(it);
 853         OBD_FREE(it, sizeof(*it));
 854
 855         if (!rc)
 856                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
 857
 858         return rc;
 859 }
 860
 861 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 862                               const char *tgt, struct dentry *dchild)
 863 {
 864         int err;
 865         ENTRY;
 866
 867         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 868                name->len, name->name, dir->i_ino, dir->i_generation,
 869                dir, 3000, tgt);
 870
 871         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 872                           0, dchild, LUSTRE_OPC_SYMLINK);
 873
 874         if (!err)
 875                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
 876
 877         RETURN(err);
 878 }
 879
 880 static int ll_link_generic(struct inode *src,  struct inode *dir,
 881                            struct qstr *name, struct dentry *dchild)
 882 {
 883         struct ll_sb_info *sbi = ll_i2sbi(dir);
 884         struct ptlrpc_request *request = NULL;
 885         struct md_op_data *op_data;
 886         int err;
 887
 888         ENTRY;
 889         CDEBUG(D_VFSTRACE,
 890                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
 891                src->i_ino, src->i_generation, src, dir->i_ino,
 892                dir->i_generation, dir, name->len, name->name);
 893
 894         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
 895                                      0, LUSTRE_OPC_ANY, NULL);
 896         if (IS_ERR(op_data))
 897                 RETURN(PTR_ERR(op_data));
 898
 899         err = md_link(sbi->ll_md_exp, op_data, &request);
 900         ll_finish_md_op_data(op_data);
 901         if (err)
 902                 GOTO(out, err);
 903
 904         ll_update_times(request, dir);
 905         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
 906         EXIT;
 907 out:
 908         ptlrpc_req_finished(request);
 909         RETURN(err);
 910 }
 911
 912 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
 913                             int mode, struct dentry *dchild)
 914
 915 {
 916         int err;
 917         ENTRY;
 918
 919         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 920                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 921
 922         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~cfs_curproc_umask()) | S_IFDIR;
 923         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
 924
 925         if (!err)
 926                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
 927
 928         RETURN(err);
 929 }
 930
 931 /* Try to find the child dentry by its name.
 932    If found, put the result fid into @fid. */
 933 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
 934                              struct lu_fid *fid)
 935 {
 936         struct dentry *parent, *child;
 937
 938         parent = list_entry(dir->i_dentry.next, struct dentry, d_alias);
 939         child = d_lookup(parent, name);
 940         if (child) {
 941                 if (child->d_inode)
 942                         *fid = *ll_inode2fid(child->d_inode);
 943                 dput(child);
 944         }
 945 }
 946
 947 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
 948                             struct dentry *dchild, struct qstr *name)
 949 {
 950         struct ptlrpc_request *request = NULL;
 951         struct md_op_data *op_data;
 952         int rc;
 953         ENTRY;
 954
 955         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 956                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 957
 958         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
 959                 RETURN(-EBUSY);
 960
 961         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
 962                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
 963         if (IS_ERR(op_data))
 964                 RETURN(PTR_ERR(op_data));
 965
 966         ll_get_child_fid(dir, name, &op_data->op_fid3);
 967         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
 968         ll_finish_md_op_data(op_data);
 969         if (rc == 0) {
 970                 ll_update_times(request, dir);
 971                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
 972         }
 973
 974         ptlrpc_req_finished(request);
 975         RETURN(rc);
 976 }
 977
 978 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
 979 {
 980         struct mdt_body *body;
 981         struct lov_mds_md *eadata;
 982         struct lov_stripe_md *lsm = NULL;
 983         struct obd_trans_info oti = { 0 };
 984         struct obdo *oa;
 985         struct obd_capa *oc = NULL;
 986         int rc;
 987         ENTRY;
 988
 989         /* req is swabbed so this is safe */
 990         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
 991         if (!(body->valid & OBD_MD_FLEASIZE))
 992                 RETURN(0);
 993
 994         if (body->eadatasize == 0) {
 995                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
 996                 GOTO(out, rc = -EPROTO);
 997         }
 998
 999         /* The MDS sent back the EA because we unlinked the last reference
1000          * to this file. Use this EA to unlink the objects on the OST.
1001          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1002          * check it is complete and sensible. */
1003         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1004                                               body->eadatasize);
1005         LASSERT(eadata != NULL);
1006
1007         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1008         if (rc < 0) {
1009                 CERROR("obd_unpackmd: %d\n", rc);
1010                 GOTO(out, rc);
1011         }
1012         LASSERT(rc >= sizeof(*lsm));
1013
1014         OBDO_ALLOC(oa);
1015         if (oa == NULL)
1016                 GOTO(out_free_memmd, rc = -ENOMEM);
1017
1018         oa->o_id = lsm->lsm_object_id;
1019         oa->o_seq = lsm->lsm_object_seq;
1020         oa->o_mode = body->mode & S_IFMT;
1021         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1022
1023         if (body->valid & OBD_MD_FLCOOKIE) {
1024                 oa->o_valid |= OBD_MD_FLCOOKIE;
1025                 oti.oti_logcookies =
1026                         req_capsule_server_sized_get(&request->rq_pill,
1027                                                      &RMF_LOGCOOKIES,
1028                                                    sizeof(struct llog_cookie) *
1029                                                      lsm->lsm_stripe_count);
1030                 if (oti.oti_logcookies == NULL) {
1031                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1032                         body->valid &= ~OBD_MD_FLCOOKIE;
1033                 }
1034         }
1035
1036         if (body->valid & OBD_MD_FLOSSCAPA) {
1037                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1038                 if (rc)
1039                         GOTO(out_free_memmd, rc);
1040         }
1041
1042         rc = obd_destroy(NULL, ll_i2dtexp(dir), oa, lsm, &oti,
1043                          ll_i2mdexp(dir), oc);
1044         capa_put(oc);
1045         OBDO_FREE(oa);
1046         if (rc)
1047                 CERROR("obd destroy objid "LPX64" error %d\n",
1048                        lsm->lsm_object_id, rc);
1049  out_free_memmd:
1050         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1051  out:
1052         return rc;
1053 }
1054
1055 /* ll_unlink_generic() doesn't update the inode with the new link count.
1056  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
1057  * is any lock existing. They will recycle dentries and inodes based upon locks
1058  * too. b=20433 */
1059 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1060                              struct dentry *dchild, struct qstr *name)
1061 {
1062         struct ptlrpc_request *request = NULL;
1063         struct md_op_data *op_data;
1064         int rc;
1065         ENTRY;
1066         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1067                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1068
1069         /*
1070          * XXX: unlink bind mountpoint maybe call to here,
1071          * just check it as vfs_unlink does.
1072          */
1073         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1074                 RETURN(-EBUSY);
1075
1076         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1077                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1078         if (IS_ERR(op_data))
1079                 RETURN(PTR_ERR(op_data));
1080
1081         ll_get_child_fid(dir, name, &op_data->op_fid3);
1082         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1083         ll_finish_md_op_data(op_data);
1084         if (rc)
1085                 GOTO(out, rc);
1086
1087         ll_update_times(request, dir);
1088         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1089
1090         rc = ll_objects_destroy(request, dir);
1091  out:
1092         ptlrpc_req_finished(request);
1093         RETURN(rc);
1094 }
1095
1096 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1097                              struct dentry *src_dchild, struct qstr *src_name,
1098                              struct inode *tgt, struct dentry *tgt_dparent,
1099                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1100 {
1101         struct ptlrpc_request *request = NULL;
1102         struct ll_sb_info *sbi = ll_i2sbi(src);
1103         struct md_op_data *op_data;
1104         int err;
1105         ENTRY;
1106         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1107                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1108                src->i_ino, src->i_generation, src, tgt_name->len,
1109                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1110
1111         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1112             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1113                 RETURN(-EBUSY);
1114
1115         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1116                                      LUSTRE_OPC_ANY, NULL);
1117         if (IS_ERR(op_data))
1118                 RETURN(PTR_ERR(op_data));
1119
1120         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1121         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1122         err = md_rename(sbi->ll_md_exp, op_data,
1123                         src_name->name, src_name->len,
1124                         tgt_name->name, tgt_name->len, &request);
1125         ll_finish_md_op_data(op_data);
1126         if (!err) {
1127                 ll_update_times(request, src);
1128                 ll_update_times(request, tgt);
1129                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1130                 err = ll_objects_destroy(request, src);
1131         }
1132
1133         ptlrpc_req_finished(request);
1134
1135         RETURN(err);
1136 }
1137
1138 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1139                     ll_dev_t rdev)
1140 {
1141         return ll_mknod_generic(dir, &dchild->d_name, mode,
1142                                 old_encode_dev(rdev), dchild);
1143 }
1144
1145 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1146 {
1147         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1148 }
1149 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1150 {
1151         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1152 }
1153 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1154 {
1155         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1156 }
1157 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1158                       const char *oldname)
1159 {
1160         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1161 }
1162 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1163                    struct dentry *new_dentry)
1164 {
1165         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1166                                new_dentry);
1167 }
1168 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1169                      struct inode *new_dir, struct dentry *new_dentry)
1170 {
1171         int err;
1172         err = ll_rename_generic(old_dir, NULL,
1173                                  old_dentry, &old_dentry->d_name,
1174                                  new_dir, NULL, new_dentry,
1175                                  &new_dentry->d_name);
1176         if (!err) {
1177 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
1178                 if (!S_ISDIR(old_dentry->d_inode->i_mode))
1179 #endif
1180                         d_move(old_dentry, new_dentry);
1181         }
1182         return err;
1183 }
1184
1185 struct inode_operations ll_dir_inode_operations = {
1186         .mknod              = ll_mknod,
1187         .lookup             = ll_lookup_nd,
1188         .create             = ll_create_nd,
1189         /* We need all these non-raw things for NFSD, to not patch it. */
1190         .unlink             = ll_unlink,
1191         .mkdir              = ll_mkdir,
1192         .rmdir              = ll_rmdir,
1193         .symlink            = ll_symlink,
1194         .link               = ll_link,
1195         .rename             = ll_rename,
1196         .setattr            = ll_setattr,
1197         .getattr            = ll_getattr,
1198         .permission         = ll_inode_permission,
1199         .setxattr           = ll_setxattr,
1200         .getxattr           = ll_getxattr,
1201         .listxattr          = ll_listxattr,
1202         .removexattr        = ll_removexattr,
1203 };
1204
1205 struct inode_operations ll_special_inode_operations = {
1206         .setattr        = ll_setattr,
1207         .getattr        = ll_getattr,
1208         .permission     = ll_inode_permission,
1209         .setxattr       = ll_setxattr,
1210         .getxattr       = ll_getxattr,
1211         .listxattr      = ll_listxattr,
1212         .removexattr    = ll_removexattr,
1213 };