lustre/llite/namei.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #include <linux/fs.h>
  38 #include <linux/sched.h>
  39 #include <linux/mm.h>
  40 #include <linux/smp_lock.h>
  41 #include <linux/quotaops.h>
  42 #include <linux/highmem.h>
  43 #include <linux/pagemap.h>
  44 #include <linux/security.h>
  45
  46 #define DEBUG_SUBSYSTEM S_LLITE
  47
  48 #include <obd_support.h>
  49 #include <lustre_fid.h>
  50 #include <lustre_lite.h>
  51 #include <lustre_dlm.h>
  52 #include <lustre_ver.h>
  53 #include "llite_internal.h"
  54
  55 /*
  56  * Check if we have something mounted at the named dchild.
  57  * In such a case there would always be dentry present.
  58  */
  59 static int ll_d_mountpoint(struct dentry *dparent, struct dentry *dchild,
  60                            struct qstr *name)
  61 {
  62         int mounted = 0;
  63
  64         if (unlikely(dchild)) {
  65                 mounted = d_mountpoint(dchild);
  66         } else if (dparent) {
  67                 dchild = d_lookup(dparent, name);
  68                 if (dchild) {
  69                         mounted = d_mountpoint(dchild);
  70                         dput(dchild);
  71                 }
  72         }
  73         return mounted;
  74 }
  75
  76 int ll_unlock(__u32 mode, struct lustre_handle *lockh)
  77 {
  78         ENTRY;
  79
  80         ldlm_lock_decref(lockh, mode);
  81
  82         RETURN(0);
  83 }
  84
  85
  86 /* called from iget5_locked->find_inode() under inode_lock spinlock */
  87 static int ll_test_inode(struct inode *inode, void *opaque)
  88 {
  89         struct ll_inode_info *lli = ll_i2info(inode);
  90         struct lustre_md     *md = opaque;
  91
  92         if (unlikely(!(md->body->valid & OBD_MD_FLID))) {
  93                 CERROR("MDS body missing FID\n");
  94                 return 0;
  95         }
  96
  97         if (!lu_fid_eq(&lli->lli_fid, &md->body->fid1))
  98                 return 0;
  99
 100         return 1;
 101 }
 102
 103 static int ll_set_inode(struct inode *inode, void *opaque)
 104 {
 105         struct ll_inode_info *lli = ll_i2info(inode);
 106         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
 107
 108         if (unlikely(!(body->valid & OBD_MD_FLID))) {
 109                 CERROR("MDS body missing FID\n");
 110                 return -EINVAL;
 111         }
 112
 113         lli->lli_fid = body->fid1;
 114         if (unlikely(!(body->valid & OBD_MD_FLTYPE))) {
 115                 CERROR("Can not initialize inode "DFID" without object type: "
 116                        "valid = "LPX64"\n", PFID(&lli->lli_fid), body->valid);
 117                 return -EINVAL;
 118         }
 119
 120         inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mode & S_IFMT);
 121         if (unlikely(inode->i_mode == 0)) {
 122                 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
 123                 return -EINVAL;
 124         }
 125
 126         ll_lli_init(lli);
 127
 128         return 0;
 129 }
 130
 131
 132 /*
 133  * Get an inode by inode number (already instantiated by the intent lookup).
 134  * Returns inode or NULL
 135  */
 136 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 137                       struct lustre_md *md)
 138 {
 139         struct inode         *inode;
 140         ENTRY;
 141
 142         LASSERT(hash != 0);
 143         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
 144
 145         if (inode) {
 146                 if (inode->i_state & I_NEW) {
 147                         int rc = 0;
 148
 149                         ll_read_inode2(inode, md);
 150                         if (S_ISREG(inode->i_mode) &&
 151                             ll_i2info(inode)->lli_clob == NULL)
 152                                 rc = cl_file_inode_init(inode, md);
 153                         if (rc != 0) {
 154                                 md->lsm = NULL;
 155                                 make_bad_inode(inode);
 156                                 unlock_new_inode(inode);
 157                                 iput(inode);
 158                                 inode = ERR_PTR(rc);
 159                         } else
 160                                 unlock_new_inode(inode);
 161                 } else if (!(inode->i_state & (I_FREEING | I_CLEAR)))
 162                         ll_update_inode(inode, md);
 163                 CDEBUG(D_VFSTRACE, "got inode: %p for "DFID"\n",
 164                        inode, PFID(&md->body->fid1));
 165         }
 166         RETURN(inode);
 167 }
 168
 169 static void ll_invalidate_negative_children(struct inode *dir)
 170 {
 171         struct dentry *dentry, *tmp_subdir;
 172
 173         ll_lock_dcache(dir);
 174         list_for_each_entry(dentry, &dir->i_dentry, d_alias) {
 175                 spin_lock(&dentry->d_lock);
 176                 if (!list_empty(&dentry->d_subdirs)) {
 177                         struct dentry *child;
 178
 179                         list_for_each_entry_safe(child, tmp_subdir,
 180                                                  &dentry->d_subdirs,
 181                                                  d_child) {
 182                                 if (child->d_inode == NULL)
 183                                         d_lustre_invalidate(child);
 184                         }
 185                 }
 186                 spin_unlock(&dentry->d_lock);
 187         }
 188         ll_unlock_dcache(dir);
 189 }
 190
 191 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 192                        void *data, int flag)
 193 {
 194         int rc;
 195         struct lustre_handle lockh;
 196         ENTRY;
 197
 198         switch (flag) {
 199         case LDLM_CB_BLOCKING:
 200                 ldlm_lock2handle(lock, &lockh);
 201                 rc = ldlm_cli_cancel(&lockh);
 202                 if (rc < 0) {
 203                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 204                         RETURN(rc);
 205                 }
 206                 break;
 207         case LDLM_CB_CANCELING: {
 208                 struct inode *inode = ll_inode_from_lock(lock);
 209                 struct ll_inode_info *lli;
 210                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 211                 struct lu_fid *fid;
 212                 ldlm_mode_t mode = lock->l_req_mode;
 213
 214                 /* Invalidate all dentries associated with this inode */
 215                 if (inode == NULL)
 216                         break;
 217
 218                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
 219                 /* For OPEN locks we differentiate between lock modes
 220                  * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
 221                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
 222                             MDS_INODELOCK_LAYOUT))
 223                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
 224
 225                 if (bits & MDS_INODELOCK_OPEN)
 226                         ll_have_md_lock(inode, &bits, mode);
 227
 228                 fid = ll_inode2fid(inode);
 229                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
 230                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
 231                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
 232                         LDLM_ERROR(lock, "data mismatch with object "
 233                                    DFID" (%p)", PFID(fid), inode);
 234                 }
 235
 236                 if (bits & MDS_INODELOCK_OPEN) {
 237                         int flags = 0;
 238                         switch (lock->l_req_mode) {
 239                         case LCK_CW:
 240                                 flags = FMODE_WRITE;
 241                                 break;
 242                         case LCK_PR:
 243                                 flags = FMODE_EXEC;
 244                                 break;
 245                         case LCK_CR:
 246                                 flags = FMODE_READ;
 247                                 break;
 248                         default:
 249                                 CERROR("Unexpected lock mode for OPEN lock "
 250                                        "%d, inode %ld\n", lock->l_req_mode,
 251                                        inode->i_ino);
 252                         }
 253                         ll_md_real_close(inode, flags);
 254                 }
 255
 256                 lli = ll_i2info(inode);
 257                 if (bits & MDS_INODELOCK_LAYOUT) {
 258                         struct cl_object_conf conf = { .coc_inode = inode,
 259                                                        .coc_invalidate = true };
 260                         rc = ll_layout_conf(inode, &conf);
 261                         if (rc)
 262                                 CDEBUG(D_INODE, "invaliding layout %d.\n", rc);
 263                 }
 264
 265                 if (bits & MDS_INODELOCK_UPDATE)
 266                         lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 267
 268                 if (S_ISDIR(inode->i_mode) &&
 269                      (bits & MDS_INODELOCK_UPDATE)) {
 270                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 271                                inode->i_ino);
 272                         truncate_inode_pages(inode->i_mapping, 0);
 273                         ll_invalidate_negative_children(inode);
 274                 }
 275
 276                 if (inode->i_sb->s_root &&
 277                     inode != inode->i_sb->s_root->d_inode &&
 278                     (bits & MDS_INODELOCK_LOOKUP))
 279                         ll_invalidate_aliases(inode);
 280                 iput(inode);
 281                 break;
 282         }
 283         default:
 284                 LBUG();
 285         }
 286
 287         RETURN(0);
 288 }
 289
 290 __u32 ll_i2suppgid(struct inode *i)
 291 {
 292         if (cfs_curproc_is_in_groups(i->i_gid))
 293                 return (__u32)i->i_gid;
 294         else
 295                 return (__u32)(-1);
 296 }
 297
 298 /* Pack the required supplementary groups into the supplied groups array.
 299  * If we don't need to use the groups from the target inode(s) then we
 300  * instead pack one or more groups from the user's supplementary group
 301  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 302 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 303 {
 304 #if 0
 305         int i;
 306 #endif
 307
 308         LASSERT(i1 != NULL);
 309         LASSERT(suppgids != NULL);
 310
 311         suppgids[0] = ll_i2suppgid(i1);
 312
 313         if (i2)
 314                 suppgids[1] = ll_i2suppgid(i2);
 315                 else
 316                         suppgids[1] = -1;
 317
 318 #if 0
 319         for (i = 0; i < current_ngroups; i++) {
 320                 if (suppgids[0] == -1) {
 321                         if (current_groups[i] != suppgids[1])
 322                                 suppgids[0] = current_groups[i];
 323                         continue;
 324                 }
 325                 if (suppgids[1] == -1) {
 326                         if (current_groups[i] != suppgids[0])
 327                                 suppgids[1] = current_groups[i];
 328                         continue;
 329                 }
 330                 break;
 331         }
 332 #endif
 333 }
 334
 335 /*
 336  * try to reuse three types of dentry:
 337  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
 338  *    by concurrent .revalidate).
 339  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
 340  *    be cleared by others calling d_lustre_revalidate).
 341  * 3. DISCONNECTED alias.
 342  */
 343 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
 344 {
 345         struct dentry *alias, *discon_alias, *invalid_alias;
 346
 347         if (list_empty(&inode->i_dentry))
 348                 return NULL;
 349
 350         discon_alias = invalid_alias = NULL;
 351
 352         ll_lock_dcache(inode);
 353         list_for_each_entry(alias, &inode->i_dentry, d_alias) {
 354                 LASSERT(alias != dentry);
 355
 356                 spin_lock(&alias->d_lock);
 357                 if (alias->d_flags & DCACHE_DISCONNECTED)
 358                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
 359                         discon_alias = alias;
 360                 else if (alias->d_parent == dentry->d_parent             &&
 361                          alias->d_name.hash == dentry->d_name.hash       &&
 362                          alias->d_name.len == dentry->d_name.len         &&
 363                          memcmp(alias->d_name.name, dentry->d_name.name,
 364                                 dentry->d_name.len) == 0)
 365                         invalid_alias = alias;
 366                 spin_unlock(&alias->d_lock);
 367
 368                 if (invalid_alias)
 369                         break;
 370         }
 371         alias = invalid_alias ?: discon_alias ?: NULL;
 372         if (alias) {
 373                 spin_lock(&alias->d_lock);
 374                 dget_dlock(alias);
 375                 spin_unlock(&alias->d_lock);
 376         }
 377         ll_unlock_dcache(inode);
 378
 379         return alias;
 380 }
 381
 382 /*
 383  * Similar to d_splice_alias(), but lustre treats DCACHE_LUSTRE_INVALID alias
 384  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
 385  */
 386 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
 387 {
 388         struct dentry *new;
 389
 390         if (inode) {
 391                 new = ll_find_alias(inode, de);
 392                 if (new) {
 393                         ll_dops_init(new, 1, 1);
 394                         d_move(new, de);
 395                         iput(inode);
 396                         CDEBUG(D_DENTRY,
 397                                "Reuse dentry %p inode %p refc %d flags %#x\n",
 398                               new, new->d_inode, d_refcount(new), new->d_flags);
 399                         return new;
 400                 }
 401         }
 402         __d_lustre_invalidate(de);
 403         ll_dops_init(de, 1, 1);
 404         d_add(de, inode);
 405         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
 406                de, de->d_inode, d_refcount(de), de->d_flags);
 407         return de;
 408 }
 409
 410 int ll_lookup_it_finish(struct ptlrpc_request *request,
 411                         struct lookup_intent *it, void *data)
 412 {
 413         struct it_cb_data *icbd = data;
 414         struct dentry **de = icbd->icbd_childp;
 415         struct inode *parent = icbd->icbd_parent;
 416         struct inode *inode = NULL;
 417         __u64 bits = 0;
 418         int rc;
 419         ENTRY;
 420
 421         /* NB 1 request reference will be taken away by ll_intent_lock()
 422          * when I return */
 423         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 424                 rc = ll_prep_inode(&inode, request, (*de)->d_sb);
 425                 if (rc)
 426                         RETURN(rc);
 427
 428                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
 429
 430                 /* We used to query real size from OSTs here, but actually
 431                    this is not needed. For stat() calls size would be updated
 432                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 433                    2.4 and
 434                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 435                    Everybody else who needs correct file size would call
 436                    ll_glimpse_size or some equivalent themselves anyway.
 437                    Also see bug 7198. */
 438         }
 439
 440         *de = ll_splice_alias(inode, *de);
 441
 442         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 443                 /* we have lookup look - unhide dentry */
 444                 if (bits & MDS_INODELOCK_LOOKUP)
 445                         d_lustre_revalidate(*de);
 446         } else {
 447                 /* Check that parent has UPDATE lock. */
 448                 struct lookup_intent parent_it = {
 449                                         .it_op = IT_GETATTR,
 450                                         .d.lustre.it_lock_handle = 0 };
 451
 452                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it,
 453                                        &ll_i2info(parent)->lli_fid, NULL)) {
 454                         d_lustre_revalidate(*de);
 455                         ll_intent_release(&parent_it);
 456                 }
 457         }
 458
 459         RETURN(0);
 460 }
 461
 462 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 463                                    struct lookup_intent *it, int lookup_flags)
 464 {
 465         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 466         struct dentry *save = dentry, *retval;
 467         struct ptlrpc_request *req = NULL;
 468         struct md_op_data *op_data;
 469         struct it_cb_data icbd;
 470         __u32 opc;
 471         int rc;
 472         ENTRY;
 473
 474         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 475                 RETURN(ERR_PTR(-ENAMETOOLONG));
 476
 477         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 478                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 479                parent->i_generation, parent, LL_IT2STR(it));
 480
 481         if (d_mountpoint(dentry))
 482                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 483
 484         ll_frob_intent(&it, &lookup_it);
 485
 486         /* As do_lookup is called before follow_mount, root dentry may be left
 487          * not valid, revalidate it here. */
 488         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 489             (it->it_op & (IT_OPEN | IT_CREAT))) {
 490                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it,
 491                                             MDS_INODELOCK_LOOKUP);
 492                 if (rc)
 493                         RETURN(ERR_PTR(rc));
 494         }
 495
 496         if (it->it_op == IT_GETATTR) {
 497                 rc = ll_statahead_enter(parent, &dentry, 0);
 498                 if (rc == 1) {
 499                         if (dentry == save)
 500                                 GOTO(out, retval = NULL);
 501                         GOTO(out, retval = dentry);
 502                 }
 503         }
 504
 505         icbd.icbd_childp = &dentry;
 506         icbd.icbd_parent = parent;
 507
 508         if (it->it_op & IT_CREAT ||
 509             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 510                 opc = LUSTRE_OPC_CREATE;
 511         else
 512                 opc = LUSTRE_OPC_ANY;
 513
 514         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 515                                      dentry->d_name.len, lookup_flags, opc,
 516                                      NULL);
 517         if (IS_ERR(op_data))
 518                 RETURN((void *)op_data);
 519
 520         it->it_create_mode &= ~cfs_curproc_umask();
 521
 522         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 523                             lookup_flags, &req, ll_md_blocking_ast, 0);
 524         ll_finish_md_op_data(op_data);
 525         if (rc < 0)
 526                 GOTO(out, retval = ERR_PTR(rc));
 527
 528         rc = ll_lookup_it_finish(req, it, &icbd);
 529         if (rc != 0) {
 530                 ll_intent_release(it);
 531                 GOTO(out, retval = ERR_PTR(rc));
 532         }
 533
 534         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 535             !S_ISREG(dentry->d_inode->i_mode) &&
 536             !S_ISDIR(dentry->d_inode->i_mode)) {
 537                 ll_release_openhandle(dentry, it);
 538         }
 539         ll_lookup_finish_locks(it, dentry);
 540
 541         if (dentry == save)
 542                 GOTO(out, retval = NULL);
 543         else
 544                 GOTO(out, retval = dentry);
 545  out:
 546         if (req)
 547                 ptlrpc_req_finished(req);
 548         if (it->it_op == IT_GETATTR && (retval == NULL || retval == dentry))
 549                 ll_statahead_mark(parent, dentry);
 550         return retval;
 551 }
 552
 553 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 554                                         int lookup_flags)
 555 {
 556         struct lookup_intent *it;
 557
 558         OBD_ALLOC(it, sizeof(*it));
 559         if (!it)
 560                 return ERR_PTR(-ENOMEM);
 561
 562         if (lookup_flags & LOOKUP_OPEN) {
 563                 it->it_op = IT_OPEN;
 564                 if (lookup_flags & LOOKUP_CREATE)
 565                         it->it_op |= IT_CREAT;
 566                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
 567                 it->it_flags = oit->flags;
 568         } else {
 569                 it->it_op = IT_GETATTR;
 570         }
 571
 572         return it;
 573 }
 574
 575 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 576                                    struct nameidata *nd)
 577 {
 578         struct dentry *de;
 579         ENTRY;
 580
 581         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 582                 struct lookup_intent *it;
 583
 584 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
 585                 /* Did we came here from failed revalidate just to propagate
 586                  * its error? */
 587                 if (nd->flags & LOOKUP_OPEN)
 588                         if (IS_ERR(nd->intent.open.file))
 589                                 RETURN((struct dentry *)nd->intent.open.file);
 590 #endif
 591                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 592                         it = ll_d2d(dentry)->lld_it;
 593                         ll_d2d(dentry)->lld_it = NULL;
 594                 } else {
 595                         if ((nd->flags & LOOKUP_CREATE ) && !(nd->flags & LOOKUP_OPEN)) {
 596                                 /* We are sure this is new dentry, so we need to create
 597                                    our private data and set the dentry ops */
 598                                 ll_dops_init(dentry, 1, 1);
 599                                 __d_lustre_invalidate(dentry);
 600                                 d_add(dentry, NULL);
 601                                 RETURN(NULL);
 602                         }
 603                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 604                         if (IS_ERR(it))
 605                                 RETURN((struct dentry *)it);
 606                 }
 607
 608                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 609                 if (de)
 610                         dentry = de;
 611                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 612                         if (dentry->d_inode &&
 613                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 614                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 615                                         // We cannot call open here as it would
 616                                         // deadlock.
 617                                         ptlrpc_req_finished(
 618                                                        (struct ptlrpc_request *)
 619                                                           it->d.lustre.it_data);
 620                                 } else {
 621                                         struct file *filp;
 622
 623                                         nd->intent.open.file->private_data = it;
 624                                         filp = lookup_instantiate_filp(nd,
 625                                                                        dentry,
 626                                                                        NULL);
 627                                         if (IS_ERR(filp)) {
 628                                                 if (de)
 629                                                         dput(de);
 630                                                 de = (struct dentry *)filp;
 631                                         }
 632                                 }
 633                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 634                                 // XXX This can only reliably work on assumption
 635                                 // that there are NO hashed negative dentries.
 636                                 ll_d2d(dentry)->lld_it = it;
 637                                 it = NULL; /* Will be freed in ll_create_nd */
 638                                 /* We absolutely depend on ll_create_nd to be
 639                                  * called to not leak this intent and possible
 640                                  * data attached to it */
 641                         }
 642                 }
 643
 644                 if (it) {
 645                         ll_intent_release(it);
 646                         OBD_FREE(it, sizeof(*it));
 647                 }
 648         } else {
 649                 de = ll_lookup_it(parent, dentry, NULL, 0);
 650         }
 651
 652         RETURN(de);
 653 }
 654
 655 /* We depend on "mode" being set with the proper file type/umask by now */
 656 static struct inode *ll_create_node(struct inode *dir, const char *name,
 657                                     int namelen, const void *data, int datalen,
 658                                     int mode, __u64 extra,
 659                                     struct lookup_intent *it)
 660 {
 661         struct inode *inode = NULL;
 662         struct ptlrpc_request *request = NULL;
 663         struct ll_sb_info *sbi = ll_i2sbi(dir);
 664         int rc;
 665         ENTRY;
 666
 667         LASSERT(it && it->d.lustre.it_disposition);
 668
 669         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 670         request = it->d.lustre.it_data;
 671         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 672         rc = ll_prep_inode(&inode, request, dir->i_sb);
 673         if (rc)
 674                 GOTO(out, inode = ERR_PTR(rc));
 675
 676         LASSERT(list_empty(&inode->i_dentry));
 677
 678         /* We asked for a lock on the directory, but were granted a
 679          * lock on the inode.  Since we finally have an inode pointer,
 680          * stuff it in the lock. */
 681         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 682                inode, inode->i_ino, inode->i_generation);
 683         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
 684         EXIT;
 685  out:
 686         ptlrpc_req_finished(request);
 687         return inode;
 688 }
 689
 690 /*
 691  * By the time this is called, we already have created the directory cache
 692  * entry for the new file, but it is so far negative - it has no inode.
 693  *
 694  * We defer creating the OBD object(s) until open, to keep the intent and
 695  * non-intent code paths similar, and also because we do not have the MDS
 696  * inode number before calling ll_create_node() (which is needed for LOV),
 697  * so we would need to do yet another RPC to the MDS to store the LOV EA
 698  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 699  * lmm_size in datalen (the MDS still has code which will handle that).
 700  *
 701  * If the create succeeds, we fill in the inode information
 702  * with d_instantiate().
 703  */
 704 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 705                         struct lookup_intent *it)
 706 {
 707         struct inode *inode;
 708         int rc = 0;
 709         ENTRY;
 710
 711         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 712                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 713                dir->i_generation, dir, LL_IT2STR(it));
 714
 715         rc = it_open_error(DISP_OPEN_CREATE, it);
 716         if (rc)
 717                 RETURN(rc);
 718
 719         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 720                                NULL, 0, mode, 0, it);
 721         if (IS_ERR(inode))
 722                 RETURN(PTR_ERR(inode));
 723
 724         d_instantiate(dentry, inode);
 725         RETURN(0);
 726 }
 727
 728 static void ll_update_times(struct ptlrpc_request *request,
 729                             struct inode *inode)
 730 {
 731         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 732                                                        &RMF_MDT_BODY);
 733
 734         LASSERT(body);
 735         if (body->valid & OBD_MD_FLMTIME &&
 736             body->mtime > LTIME_S(inode->i_mtime)) {
 737                 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to "LPU64"\n",
 738                        inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
 739                 LTIME_S(inode->i_mtime) = body->mtime;
 740         }
 741         if (body->valid & OBD_MD_FLCTIME &&
 742             body->ctime > LTIME_S(inode->i_ctime))
 743                 LTIME_S(inode->i_ctime) = body->ctime;
 744 }
 745
 746 static int ll_new_node(struct inode *dir, struct qstr *name,
 747                        const char *tgt, int mode, int rdev,
 748                        struct dentry *dchild, __u32 opc)
 749 {
 750         struct ptlrpc_request *request = NULL;
 751         struct md_op_data *op_data;
 752         struct inode *inode = NULL;
 753         struct ll_sb_info *sbi = ll_i2sbi(dir);
 754         int tgt_len = 0;
 755         int err;
 756
 757         ENTRY;
 758         if (unlikely(tgt != NULL))
 759                 tgt_len = strlen(tgt) + 1;
 760
 761         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 762                                      name->len, 0, opc, NULL);
 763         if (IS_ERR(op_data))
 764                 GOTO(err_exit, err = PTR_ERR(op_data));
 765
 766         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 767                         cfs_curproc_fsuid(), cfs_curproc_fsgid(),
 768                         cfs_curproc_cap_pack(), rdev, &request);
 769         ll_finish_md_op_data(op_data);
 770         if (err)
 771                 GOTO(err_exit, err);
 772
 773         ll_update_times(request, dir);
 774
 775         if (dchild) {
 776                 err = ll_prep_inode(&inode, request, dchild->d_sb);
 777                 if (err)
 778                      GOTO(err_exit, err);
 779
 780                 d_instantiate(dchild, inode);
 781         }
 782         EXIT;
 783 err_exit:
 784         ptlrpc_req_finished(request);
 785
 786         return err;
 787 }
 788
 789 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 790                             unsigned rdev, struct dentry *dchild)
 791 {
 792         int err;
 793         ENTRY;
 794
 795         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 796                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 797                mode, rdev);
 798
 799         mode &= ~cfs_curproc_umask();
 800
 801         switch (mode & S_IFMT) {
 802         case 0:
 803                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 804         case S_IFREG:
 805         case S_IFCHR:
 806         case S_IFBLK:
 807         case S_IFIFO:
 808         case S_IFSOCK:
 809                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 810                                   LUSTRE_OPC_MKNOD);
 811                 break;
 812         case S_IFDIR:
 813                 err = -EPERM;
 814                 break;
 815         default:
 816                 err = -EINVAL;
 817         }
 818
 819         if (!err)
 820                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
 821
 822         RETURN(err);
 823 }
 824
 825 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 826                         int mode, struct nameidata *nd)
 827 {
 828         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 829         int rc;
 830
 831         if (!it)
 832                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 833
 834         ll_d2d(dentry)->lld_it = NULL;
 835
 836         /* Was there an error? Propagate it! */
 837         if (it->d.lustre.it_status) {
 838                 rc = it->d.lustre.it_status;
 839                 goto out;
 840         }
 841
 842         rc = ll_create_it(dir, dentry, mode, it);
 843         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 844                 struct file *filp;
 845
 846                 nd->intent.open.file->private_data = it;
 847                 filp = lookup_instantiate_filp(nd, dentry, NULL);
 848                 if (IS_ERR(filp))
 849                         rc = PTR_ERR(filp);
 850         }
 851
 852 out:
 853         ll_intent_release(it);
 854         OBD_FREE(it, sizeof(*it));
 855
 856         if (!rc)
 857                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
 858
 859         return rc;
 860 }
 861
 862 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 863                               const char *tgt, struct dentry *dchild)
 864 {
 865         int err;
 866         ENTRY;
 867
 868         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 869                name->len, name->name, dir->i_ino, dir->i_generation,
 870                dir, 3000, tgt);
 871
 872         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 873                           0, dchild, LUSTRE_OPC_SYMLINK);
 874
 875         if (!err)
 876                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
 877
 878         RETURN(err);
 879 }
 880
 881 static int ll_link_generic(struct inode *src,  struct inode *dir,
 882                            struct qstr *name, struct dentry *dchild)
 883 {
 884         struct ll_sb_info *sbi = ll_i2sbi(dir);
 885         struct ptlrpc_request *request = NULL;
 886         struct md_op_data *op_data;
 887         int err;
 888
 889         ENTRY;
 890         CDEBUG(D_VFSTRACE,
 891                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
 892                src->i_ino, src->i_generation, src, dir->i_ino,
 893                dir->i_generation, dir, name->len, name->name);
 894
 895         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
 896                                      0, LUSTRE_OPC_ANY, NULL);
 897         if (IS_ERR(op_data))
 898                 RETURN(PTR_ERR(op_data));
 899
 900         err = md_link(sbi->ll_md_exp, op_data, &request);
 901         ll_finish_md_op_data(op_data);
 902         if (err)
 903                 GOTO(out, err);
 904
 905         ll_update_times(request, dir);
 906         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
 907         EXIT;
 908 out:
 909         ptlrpc_req_finished(request);
 910         RETURN(err);
 911 }
 912
 913 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
 914                             int mode, struct dentry *dchild)
 915
 916 {
 917         int err;
 918         ENTRY;
 919
 920         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 921                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 922
 923         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~cfs_curproc_umask()) | S_IFDIR;
 924         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
 925
 926         if (!err)
 927                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
 928
 929         RETURN(err);
 930 }
 931
 932 /* Try to find the child dentry by its name.
 933    If found, put the result fid into @fid. */
 934 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
 935                              struct lu_fid *fid)
 936 {
 937         struct dentry *parent, *child;
 938
 939         parent = list_entry(dir->i_dentry.next, struct dentry, d_alias);
 940         child = d_lookup(parent, name);
 941         if (child) {
 942                 if (child->d_inode)
 943                         *fid = *ll_inode2fid(child->d_inode);
 944                 dput(child);
 945         }
 946 }
 947
 948 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
 949                             struct dentry *dchild, struct qstr *name)
 950 {
 951         struct ptlrpc_request *request = NULL;
 952         struct md_op_data *op_data;
 953         int rc;
 954         ENTRY;
 955
 956         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 957                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 958
 959         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
 960                 RETURN(-EBUSY);
 961
 962         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
 963                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
 964         if (IS_ERR(op_data))
 965                 RETURN(PTR_ERR(op_data));
 966
 967         ll_get_child_fid(dir, name, &op_data->op_fid3);
 968         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
 969         ll_finish_md_op_data(op_data);
 970         if (rc == 0) {
 971                 ll_update_times(request, dir);
 972                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
 973         }
 974
 975         ptlrpc_req_finished(request);
 976         RETURN(rc);
 977 }
 978
 979 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
 980 {
 981         struct mdt_body *body;
 982         struct lov_mds_md *eadata;
 983         struct lov_stripe_md *lsm = NULL;
 984         struct obd_trans_info oti = { 0 };
 985         struct obdo *oa;
 986         struct obd_capa *oc = NULL;
 987         int rc;
 988         ENTRY;
 989
 990         /* req is swabbed so this is safe */
 991         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
 992         if (!(body->valid & OBD_MD_FLEASIZE))
 993                 RETURN(0);
 994
 995         if (body->eadatasize == 0) {
 996                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
 997                 GOTO(out, rc = -EPROTO);
 998         }
 999
1000         /* The MDS sent back the EA because we unlinked the last reference
1001          * to this file. Use this EA to unlink the objects on the OST.
1002          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1003          * check it is complete and sensible. */
1004         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1005                                               body->eadatasize);
1006         LASSERT(eadata != NULL);
1007
1008         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1009         if (rc < 0) {
1010                 CERROR("obd_unpackmd: %d\n", rc);
1011                 GOTO(out, rc);
1012         }
1013         LASSERT(rc >= sizeof(*lsm));
1014
1015         OBDO_ALLOC(oa);
1016         if (oa == NULL)
1017                 GOTO(out_free_memmd, rc = -ENOMEM);
1018
1019         oa->o_id = lsm->lsm_object_id;
1020         oa->o_seq = lsm->lsm_object_seq;
1021         oa->o_mode = body->mode & S_IFMT;
1022         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1023
1024         if (body->valid & OBD_MD_FLCOOKIE) {
1025                 oa->o_valid |= OBD_MD_FLCOOKIE;
1026                 oti.oti_logcookies =
1027                         req_capsule_server_sized_get(&request->rq_pill,
1028                                                      &RMF_LOGCOOKIES,
1029                                                    sizeof(struct llog_cookie) *
1030                                                      lsm->lsm_stripe_count);
1031                 if (oti.oti_logcookies == NULL) {
1032                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1033                         body->valid &= ~OBD_MD_FLCOOKIE;
1034                 }
1035         }
1036
1037         if (body->valid & OBD_MD_FLOSSCAPA) {
1038                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1039                 if (rc)
1040                         GOTO(out_free_memmd, rc);
1041         }
1042
1043         rc = obd_destroy(NULL, ll_i2dtexp(dir), oa, lsm, &oti,
1044                          ll_i2mdexp(dir), oc);
1045         capa_put(oc);
1046         OBDO_FREE(oa);
1047         if (rc)
1048                 CERROR("obd destroy objid "LPX64" error %d\n",
1049                        lsm->lsm_object_id, rc);
1050  out_free_memmd:
1051         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1052  out:
1053         return rc;
1054 }
1055
1056 /* ll_unlink_generic() doesn't update the inode with the new link count.
1057  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
1058  * is any lock existing. They will recycle dentries and inodes based upon locks
1059  * too. b=20433 */
1060 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1061                              struct dentry *dchild, struct qstr *name)
1062 {
1063         struct ptlrpc_request *request = NULL;
1064         struct md_op_data *op_data;
1065         int rc;
1066         ENTRY;
1067         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1068                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1069
1070         /*
1071          * XXX: unlink bind mountpoint maybe call to here,
1072          * just check it as vfs_unlink does.
1073          */
1074         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1075                 RETURN(-EBUSY);
1076
1077         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1078                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1079         if (IS_ERR(op_data))
1080                 RETURN(PTR_ERR(op_data));
1081
1082         ll_get_child_fid(dir, name, &op_data->op_fid3);
1083         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1084         ll_finish_md_op_data(op_data);
1085         if (rc)
1086                 GOTO(out, rc);
1087
1088         ll_update_times(request, dir);
1089         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1090
1091         rc = ll_objects_destroy(request, dir);
1092  out:
1093         ptlrpc_req_finished(request);
1094         RETURN(rc);
1095 }
1096
1097 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1098                              struct dentry *src_dchild, struct qstr *src_name,
1099                              struct inode *tgt, struct dentry *tgt_dparent,
1100                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1101 {
1102         struct ptlrpc_request *request = NULL;
1103         struct ll_sb_info *sbi = ll_i2sbi(src);
1104         struct md_op_data *op_data;
1105         int err;
1106         ENTRY;
1107         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1108                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1109                src->i_ino, src->i_generation, src, tgt_name->len,
1110                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1111
1112         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1113             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1114                 RETURN(-EBUSY);
1115
1116         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1117                                      LUSTRE_OPC_ANY, NULL);
1118         if (IS_ERR(op_data))
1119                 RETURN(PTR_ERR(op_data));
1120
1121         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1122         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1123         err = md_rename(sbi->ll_md_exp, op_data,
1124                         src_name->name, src_name->len,
1125                         tgt_name->name, tgt_name->len, &request);
1126         ll_finish_md_op_data(op_data);
1127         if (!err) {
1128                 ll_update_times(request, src);
1129                 ll_update_times(request, tgt);
1130                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1131                 err = ll_objects_destroy(request, src);
1132         }
1133
1134         ptlrpc_req_finished(request);
1135
1136         RETURN(err);
1137 }
1138
1139 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1140                     ll_dev_t rdev)
1141 {
1142         return ll_mknod_generic(dir, &dchild->d_name, mode,
1143                                 old_encode_dev(rdev), dchild);
1144 }
1145
1146 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1147 {
1148         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1149 }
1150 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1151 {
1152         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1153 }
1154 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1155 {
1156         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1157 }
1158 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1159                       const char *oldname)
1160 {
1161         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1162 }
1163 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1164                    struct dentry *new_dentry)
1165 {
1166         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1167                                new_dentry);
1168 }
1169 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1170                      struct inode *new_dir, struct dentry *new_dentry)
1171 {
1172         int err;
1173         err = ll_rename_generic(old_dir, NULL,
1174                                  old_dentry, &old_dentry->d_name,
1175                                  new_dir, NULL, new_dentry,
1176                                  &new_dentry->d_name);
1177         if (!err) {
1178 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
1179                 if (!S_ISDIR(old_dentry->d_inode->i_mode))
1180 #endif
1181                         d_move(old_dentry, new_dentry);
1182         }
1183         return err;
1184 }
1185
1186 struct inode_operations ll_dir_inode_operations = {
1187         .mknod              = ll_mknod,
1188         .lookup             = ll_lookup_nd,
1189         .create             = ll_create_nd,
1190         /* We need all these non-raw things for NFSD, to not patch it. */
1191         .unlink             = ll_unlink,
1192         .mkdir              = ll_mkdir,
1193         .rmdir              = ll_rmdir,
1194         .symlink            = ll_symlink,
1195         .link               = ll_link,
1196         .rename             = ll_rename,
1197         .setattr            = ll_setattr,
1198         .getattr            = ll_getattr,
1199         .permission         = ll_inode_permission,
1200         .setxattr           = ll_setxattr,
1201         .getxattr           = ll_getxattr,
1202         .listxattr          = ll_listxattr,
1203         .removexattr        = ll_removexattr,
1204 };
1205
1206 struct inode_operations ll_special_inode_operations = {
1207         .setattr        = ll_setattr,
1208         .getattr        = ll_getattr,
1209         .permission     = ll_inode_permission,
1210         .setxattr       = ll_setxattr,
1211         .getxattr       = ll_getxattr,
1212         .listxattr      = ll_listxattr,
1213         .removexattr    = ll_removexattr,
1214 };