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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32
  33 #include <linux/fs.h>
  34 #include <linux/sched.h>
  35 #include <linux/mm.h>
  36 #include <linux/quotaops.h>
  37 #include <linux/highmem.h>
  38 #include <linux/pagemap.h>
  39 #include <linux/security.h>
  40 #include <linux/user_namespace.h>
  41 #ifdef HAVE_UIDGID_HEADER
  42 # include <linux/uidgid.h>
  43 #endif
  44
  45 #define DEBUG_SUBSYSTEM S_LLITE
  46
  47 #include <obd_support.h>
  48 #include <lustre_fid.h>
  49 #include <lustre_dlm.h>
  50 #include "llite_internal.h"
  51
  52 static int ll_create_it(struct inode *dir, struct dentry *dentry,
  53                         struct lookup_intent *it,
  54                         void *secctx, __u32 secctxlen);
  55
  56 /* called from iget5_locked->find_inode() under inode_lock spinlock */
  57 static int ll_test_inode(struct inode *inode, void *opaque)
  58 {
  59         struct ll_inode_info    *lli = ll_i2info(inode);
  60         struct lustre_md        *md = opaque;
  61
  62         if (unlikely(!(md->body->mbo_valid & OBD_MD_FLID))) {
  63                 CERROR("MDS body missing FID\n");
  64                 return 0;
  65         }
  66
  67         if (!lu_fid_eq(&lli->lli_fid, &md->body->mbo_fid1))
  68                 return 0;
  69
  70         return 1;
  71 }
  72
  73 static int ll_set_inode(struct inode *inode, void *opaque)
  74 {
  75         struct ll_inode_info *lli = ll_i2info(inode);
  76         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
  77
  78         if (unlikely(!(body->mbo_valid & OBD_MD_FLID))) {
  79                 CERROR("MDS body missing FID\n");
  80                 return -EINVAL;
  81         }
  82
  83         lli->lli_fid = body->mbo_fid1;
  84         if (unlikely(!(body->mbo_valid & OBD_MD_FLTYPE))) {
  85                 CERROR("Can not initialize inode "DFID" without object type: "
  86                        "valid = %#llx\n",
  87                        PFID(&lli->lli_fid), body->mbo_valid);
  88                 return -EINVAL;
  89         }
  90
  91         inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mbo_mode & S_IFMT);
  92         if (unlikely(inode->i_mode == 0)) {
  93                 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
  94                 return -EINVAL;
  95         }
  96
  97         ll_lli_init(lli);
  98
  99         return 0;
 100 }
 101
 102
 103 /**
 104  * Get an inode by inode number(@hash), which is already instantiated by
 105  * the intent lookup).
 106  */
 107 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 108                       struct lustre_md *md)
 109 {
 110         struct inode    *inode;
 111         int             rc = 0;
 112
 113         ENTRY;
 114
 115         LASSERT(hash != 0);
 116         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
 117         if (inode == NULL)
 118                 RETURN(ERR_PTR(-ENOMEM));
 119
 120         if (inode->i_state & I_NEW) {
 121                 rc = ll_read_inode2(inode, md);
 122                 if (rc == 0 && S_ISREG(inode->i_mode) &&
 123                     ll_i2info(inode)->lli_clob == NULL)
 124                         rc = cl_file_inode_init(inode, md);
 125
 126                 if (rc != 0) {
 127                         /* Let's clear directory lsm here, otherwise
 128                          * make_bad_inode() will reset the inode mode
 129                          * to regular, then ll_clear_inode will not
 130                          * be able to clear lsm_md */
 131                         if (S_ISDIR(inode->i_mode))
 132                                 ll_dir_clear_lsm_md(inode);
 133                         make_bad_inode(inode);
 134                         unlock_new_inode(inode);
 135                         iput(inode);
 136                         inode = ERR_PTR(rc);
 137                 } else {
 138                         inode_has_no_xattr(inode);
 139                         unlock_new_inode(inode);
 140                 }
 141         } else if (is_bad_inode(inode)) {
 142                 iput(inode);
 143                 inode = ERR_PTR(-ESTALE);
 144         } else if (!(inode->i_state & (I_FREEING | I_CLEAR))) {
 145                 rc = ll_update_inode(inode, md);
 146                 CDEBUG(D_VFSTRACE, "got inode: "DFID"(%p): rc = %d\n",
 147                        PFID(&md->body->mbo_fid1), inode, rc);
 148                 if (rc != 0) {
 149                         if (S_ISDIR(inode->i_mode))
 150                                 ll_dir_clear_lsm_md(inode);
 151                         iput(inode);
 152                         inode = ERR_PTR(rc);
 153                 }
 154         }
 155
 156         RETURN(inode);
 157 }
 158
 159 static void ll_invalidate_negative_children(struct inode *dir)
 160 {
 161         struct dentry *dentry, *tmp_subdir;
 162         DECLARE_LL_D_HLIST_NODE_PTR(p);
 163
 164         ll_lock_dcache(dir);
 165         ll_d_hlist_for_each_entry(dentry, p, &dir->i_dentry) {
 166                 spin_lock(&dentry->d_lock);
 167                 if (!list_empty(&dentry->d_subdirs)) {
 168                         struct dentry *child;
 169
 170                         list_for_each_entry_safe(child, tmp_subdir,
 171                                                  &dentry->d_subdirs,
 172                                                  d_child) {
 173                                 if (child->d_inode == NULL)
 174                                         d_lustre_invalidate(child, 1);
 175                         }
 176                 }
 177                 spin_unlock(&dentry->d_lock);
 178         }
 179         ll_unlock_dcache(dir);
 180 }
 181
 182 int ll_test_inode_by_fid(struct inode *inode, void *opaque)
 183 {
 184         return lu_fid_eq(&ll_i2info(inode)->lli_fid, opaque);
 185 }
 186
 187 static int ll_dom_lock_cancel(struct inode *inode, struct ldlm_lock *lock)
 188 {
 189         struct lu_env *env;
 190         struct ll_inode_info *lli = ll_i2info(inode);
 191         __u16 refcheck;
 192         int rc;
 193         ENTRY;
 194
 195         env = cl_env_get(&refcheck);
 196         if (IS_ERR(env))
 197                 RETURN(PTR_ERR(env));
 198
 199         /* reach MDC layer to flush data under  the DoM ldlm lock */
 200         rc = cl_object_flush(env, lli->lli_clob, lock);
 201         if (rc == -ENODATA) {
 202                 CDEBUG(D_INODE, "inode "DFID" layout has no DoM stripe\n",
 203                        PFID(ll_inode2fid(inode)));
 204                 /* most likely result of layout change, do nothing */
 205                 rc = 0;
 206         }
 207
 208         cl_env_put(env, &refcheck);
 209         RETURN(rc);
 210 }
 211
 212 static void ll_lock_cancel_bits(struct ldlm_lock *lock, __u64 to_cancel)
 213 {
 214         struct inode *inode = ll_inode_from_resource_lock(lock);
 215         __u64 bits = to_cancel;
 216         int rc;
 217
 218         ENTRY;
 219
 220         if (!inode) {
 221                 /* That means the inode is evicted most likely and may cause
 222                  * the skipping of lock cleanups below, so print the message
 223                  * about that in log.
 224                  */
 225                 if (lock->l_resource->lr_lvb_inode)
 226                         LDLM_DEBUG(lock,
 227                                    "can't take inode for the lock (%sevicted)\n",
 228                                    lock->l_resource->lr_lvb_inode->i_state &
 229                                    I_FREEING ? "" : "not ");
 230                 RETURN_EXIT;
 231         }
 232
 233         if (!fid_res_name_eq(ll_inode2fid(inode),
 234                              &lock->l_resource->lr_name)) {
 235                 LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
 236                            PFID(ll_inode2fid(inode)), inode);
 237                 LBUG();
 238         }
 239
 240         if (bits & MDS_INODELOCK_XATTR) {
 241                 if (S_ISDIR(inode->i_mode))
 242                         ll_i2info(inode)->lli_def_stripe_offset = -1;
 243                 ll_xattr_cache_destroy(inode);
 244                 bits &= ~MDS_INODELOCK_XATTR;
 245         }
 246
 247         /* For OPEN locks we differentiate between lock modes
 248          * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
 249         if (bits & MDS_INODELOCK_OPEN)
 250                 ll_have_md_lock(inode, &bits, lock->l_req_mode);
 251
 252         if (bits & MDS_INODELOCK_OPEN) {
 253                 fmode_t fmode;
 254
 255                 switch (lock->l_req_mode) {
 256                 case LCK_CW:
 257                         fmode = FMODE_WRITE;
 258                         break;
 259                 case LCK_PR:
 260                         fmode = FMODE_EXEC;
 261                         break;
 262                 case LCK_CR:
 263                         fmode = FMODE_READ;
 264                         break;
 265                 default:
 266                         LDLM_ERROR(lock, "bad lock mode for OPEN lock");
 267                         LBUG();
 268                 }
 269
 270                 ll_md_real_close(inode, fmode);
 271
 272                 bits &= ~MDS_INODELOCK_OPEN;
 273         }
 274
 275         if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
 276                     MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM |
 277                     MDS_INODELOCK_DOM))
 278                 ll_have_md_lock(inode, &bits, LCK_MINMODE);
 279
 280         if (bits & MDS_INODELOCK_DOM) {
 281                 rc =  ll_dom_lock_cancel(inode, lock);
 282                 if (rc < 0)
 283                         CDEBUG(D_INODE, "cannot flush DoM data "
 284                                DFID": rc = %d\n",
 285                                PFID(ll_inode2fid(inode)), rc);
 286         }
 287
 288         if (bits & MDS_INODELOCK_LAYOUT) {
 289                 struct cl_object_conf conf = {
 290                         .coc_opc = OBJECT_CONF_INVALIDATE,
 291                         .coc_inode = inode,
 292                 };
 293
 294                 rc = ll_layout_conf(inode, &conf);
 295                 if (rc < 0)
 296                         CDEBUG(D_INODE, "cannot invalidate layout of "
 297                                DFID": rc = %d\n",
 298                                PFID(ll_inode2fid(inode)), rc);
 299         }
 300
 301         if (bits & MDS_INODELOCK_UPDATE) {
 302                 struct ll_inode_info *lli = ll_i2info(inode);
 303
 304                 lli->lli_update_atime = 1;
 305         }
 306
 307         if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
 308                 struct ll_inode_info *lli = ll_i2info(inode);
 309
 310                 CDEBUG(D_INODE, "invalidating inode "DFID" lli = %p, "
 311                        "pfid  = "DFID"\n", PFID(ll_inode2fid(inode)),
 312                        lli, PFID(&lli->lli_pfid));
 313                 truncate_inode_pages(inode->i_mapping, 0);
 314
 315                 if (unlikely(!fid_is_zero(&lli->lli_pfid))) {
 316                         struct inode *master_inode = NULL;
 317                         unsigned long hash;
 318
 319                         /* This is slave inode, since all of the child dentry
 320                          * is connected on the master inode, so we have to
 321                          * invalidate the negative children on master inode */
 322                         CDEBUG(D_INODE, "Invalidate s"DFID" m"DFID"\n",
 323                                PFID(ll_inode2fid(inode)), PFID(&lli->lli_pfid));
 324
 325                         hash = cl_fid_build_ino(&lli->lli_pfid,
 326                                         ll_need_32bit_api(ll_i2sbi(inode)));
 327
 328                         /* Do not lookup the inode with ilookup5, otherwise
 329                          * it will cause dead lock,
 330                          * 1. Client1 send chmod req to the MDT0, then on MDT0,
 331                          * it enqueues master and all of its slaves lock,
 332                          * (mdt_attr_set() -> mdt_lock_slaves()), after gets
 333                          * master and stripe0 lock, it will send the enqueue
 334                          * req (for stripe1) to MDT1, then MDT1 finds the lock
 335                          * has been granted to client2. Then MDT1 sends blocking
 336                          * ast to client2.
 337                          * 2. At the same time, client2 tries to unlink
 338                          * the striped dir (rm -rf striped_dir), and during
 339                          * lookup, it will hold the master inode of the striped
 340                          * directory, whose inode state is NEW, then tries to
 341                          * revalidate all of its slaves, (ll_prep_inode()->
 342                          * ll_iget()->ll_read_inode2()-> ll_update_inode().).
 343                          * And it will be blocked on the server side because
 344                          * of 1.
 345                          * 3. Then the client get the blocking_ast req, cancel
 346                          * the lock, but being blocked if using ->ilookup5()),
 347                          * because master inode state is NEW. */
 348                         master_inode = ilookup5_nowait(inode->i_sb, hash,
 349                                                         ll_test_inode_by_fid,
 350                                                         (void *)&lli->lli_pfid);
 351                         if (master_inode) {
 352                                 ll_invalidate_negative_children(master_inode);
 353                                 iput(master_inode);
 354                         }
 355                 } else {
 356                         ll_invalidate_negative_children(inode);
 357                 }
 358         }
 359
 360         if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
 361             inode->i_sb->s_root != NULL &&
 362             inode != inode->i_sb->s_root->d_inode)
 363                 ll_invalidate_aliases(inode);
 364
 365         if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM))
 366                 forget_all_cached_acls(inode);
 367
 368         iput(inode);
 369         RETURN_EXIT;
 370 }
 371
 372 /* Check if the given lock may be downgraded instead of canceling and
 373  * that convert is really needed. */
 374 int ll_md_need_convert(struct ldlm_lock *lock)
 375 {
 376         struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
 377         struct inode *inode;
 378         __u64 wanted = lock->l_policy_data.l_inodebits.cancel_bits;
 379         __u64 bits = lock->l_policy_data.l_inodebits.bits & ~wanted;
 380         enum ldlm_mode mode = LCK_MINMODE;
 381
 382         if (!lock->l_conn_export ||
 383             !exp_connect_lock_convert(lock->l_conn_export))
 384                 return 0;
 385
 386         if (!wanted || !bits || ldlm_is_cancel(lock))
 387                 return 0;
 388
 389         /* do not convert locks other than DOM for now */
 390         if (!((bits | wanted) & MDS_INODELOCK_DOM))
 391                 return 0;
 392
 393         /* We may have already remaining bits in some other lock so
 394          * lock convert will leave us just extra lock for the same bit.
 395          * Check if client has other lock with the same bits and the same
 396          * or lower mode and don't convert if any.
 397          */
 398         switch (lock->l_req_mode) {
 399         case LCK_PR:
 400                 mode = LCK_PR;
 401         case LCK_PW:
 402                 mode |= LCK_CR;
 403                 break;
 404         case LCK_CW:
 405                 mode = LCK_CW;
 406         case LCK_CR:
 407                 mode |= LCK_CR;
 408                 break;
 409         default:
 410                 /* do not convert other modes */
 411                 return 0;
 412         }
 413
 414         /* is lock is too old to be converted? */
 415         lock_res_and_lock(lock);
 416         if (ktime_after(ktime_get(),
 417                         ktime_add(lock->l_last_used,
 418                                   ktime_set(ns->ns_dirty_age_limit, 0)))) {
 419                 unlock_res_and_lock(lock);
 420                 return 0;
 421         }
 422         unlock_res_and_lock(lock);
 423
 424         inode = ll_inode_from_resource_lock(lock);
 425         ll_have_md_lock(inode, &bits, mode);
 426         iput(inode);
 427         return !!(bits);
 428 }
 429
 430 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *ld,
 431                        void *data, int flag)
 432 {
 433         struct lustre_handle lockh;
 434         int rc;
 435
 436         ENTRY;
 437
 438         switch (flag) {
 439         case LDLM_CB_BLOCKING:
 440         {
 441                 __u64 cancel_flags = LCF_ASYNC;
 442
 443                 /* if lock convert is not needed then still have to
 444                  * pass lock via ldlm_cli_convert() to keep all states
 445                  * correct, set cancel_bits to full lock bits to cause
 446                  * full cancel to happen.
 447                  */
 448                 if (!ll_md_need_convert(lock)) {
 449                         lock_res_and_lock(lock);
 450                         lock->l_policy_data.l_inodebits.cancel_bits =
 451                                         lock->l_policy_data.l_inodebits.bits;
 452                         unlock_res_and_lock(lock);
 453                 }
 454                 rc = ldlm_cli_convert(lock, cancel_flags);
 455                 if (!rc)
 456                         RETURN(0);
 457                 /* continue with cancel otherwise */
 458                 ldlm_lock2handle(lock, &lockh);
 459                 rc = ldlm_cli_cancel(&lockh, cancel_flags);
 460                 if (rc < 0) {
 461                         CDEBUG(D_INODE, "ldlm_cli_cancel: rc = %d\n", rc);
 462                         RETURN(rc);
 463                 }
 464                 break;
 465         }
 466         case LDLM_CB_CANCELING:
 467         {
 468                 __u64 to_cancel = lock->l_policy_data.l_inodebits.bits;
 469
 470                 /* Nothing to do for non-granted locks */
 471                 if (!ldlm_is_granted(lock))
 472                         break;
 473
 474                 /* If 'ld' is supplied then bits to be cancelled are passed
 475                  * implicitly by lock converting and cancel_bits from 'ld'
 476                  * should be used. Otherwise full cancel is being performed
 477                  * and lock inodebits are used.
 478                  *
 479                  * Note: we cannot rely on cancel_bits in lock itself at this
 480                  * moment because they can be changed by concurrent thread,
 481                  * so ldlm_cli_inodebits_convert() pass cancel bits implicitly
 482                  * in 'ld' parameter.
 483                  */
 484                 if (ld) {
 485                         /* partial bits cancel allowed only during convert */
 486                         LASSERT(ldlm_is_converting(lock));
 487                         /* mask cancel bits by lock bits so only no any unused
 488                          * bits are passed to ll_lock_cancel_bits()
 489                          */
 490                         to_cancel &= ld->l_policy_data.l_inodebits.cancel_bits;
 491                 }
 492                 ll_lock_cancel_bits(lock, to_cancel);
 493                 break;
 494         }
 495         default:
 496                 LBUG();
 497         }
 498
 499         RETURN(0);
 500 }
 501
 502 __u32 ll_i2suppgid(struct inode *i)
 503 {
 504         if (in_group_p(i->i_gid))
 505                 return (__u32)from_kgid(&init_user_ns, i->i_gid);
 506         else
 507                 return (__u32) __kgid_val(INVALID_GID);
 508 }
 509
 510 /* Pack the required supplementary groups into the supplied groups array.
 511  * If we don't need to use the groups from the target inode(s) then we
 512  * instead pack one or more groups from the user's supplementary group
 513  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 514 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 515 {
 516         LASSERT(i1 != NULL);
 517         LASSERT(suppgids != NULL);
 518
 519         suppgids[0] = ll_i2suppgid(i1);
 520
 521         if (i2)
 522                 suppgids[1] = ll_i2suppgid(i2);
 523         else
 524                 suppgids[1] = -1;
 525 }
 526
 527 /*
 528  * try to reuse three types of dentry:
 529  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
 530  *    by concurrent .revalidate).
 531  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
 532  *    be cleared by others calling d_lustre_revalidate).
 533  * 3. DISCONNECTED alias.
 534  */
 535 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
 536 {
 537         struct dentry *alias, *discon_alias, *invalid_alias;
 538         DECLARE_LL_D_HLIST_NODE_PTR(p);
 539
 540         if (ll_d_hlist_empty(&inode->i_dentry))
 541                 return NULL;
 542
 543         discon_alias = invalid_alias = NULL;
 544
 545         ll_lock_dcache(inode);
 546         ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry) {
 547                 LASSERT(alias != dentry);
 548
 549                 spin_lock(&alias->d_lock);
 550                 if ((alias->d_flags & DCACHE_DISCONNECTED) &&
 551                     S_ISDIR(inode->i_mode))
 552                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
 553                         discon_alias = alias;
 554                 else if (alias->d_parent == dentry->d_parent             &&
 555                          alias->d_name.hash == dentry->d_name.hash       &&
 556                          alias->d_name.len == dentry->d_name.len         &&
 557                          memcmp(alias->d_name.name, dentry->d_name.name,
 558                                 dentry->d_name.len) == 0)
 559                         invalid_alias = alias;
 560                 spin_unlock(&alias->d_lock);
 561
 562                 if (invalid_alias)
 563                         break;
 564         }
 565         alias = invalid_alias ?: discon_alias ?: NULL;
 566         if (alias) {
 567                 spin_lock(&alias->d_lock);
 568                 dget_dlock(alias);
 569                 spin_unlock(&alias->d_lock);
 570         }
 571         ll_unlock_dcache(inode);
 572
 573         return alias;
 574 }
 575
 576 /*
 577  * Similar to d_splice_alias(), but lustre treats invalid alias
 578  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
 579  */
 580 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
 581 {
 582         struct dentry *new;
 583         int rc;
 584
 585         if (inode) {
 586                 new = ll_find_alias(inode, de);
 587                 if (new) {
 588                         rc = ll_d_init(new);
 589                         if (rc < 0) {
 590                                 dput(new);
 591                                 return ERR_PTR(rc);
 592                         }
 593                         d_move(new, de);
 594                         iput(inode);
 595                         CDEBUG(D_DENTRY,
 596                                "Reuse dentry %p inode %p refc %d flags %#x\n",
 597                               new, new->d_inode, ll_d_count(new), new->d_flags);
 598                         return new;
 599                 }
 600         }
 601         rc = ll_d_init(de);
 602         if (rc < 0)
 603                 return ERR_PTR(rc);
 604         d_add(de, inode);
 605         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
 606                de, de->d_inode, ll_d_count(de), de->d_flags);
 607         return de;
 608 }
 609
 610 static int ll_lookup_it_finish(struct ptlrpc_request *request,
 611                                struct lookup_intent *it,
 612                                struct inode *parent, struct dentry **de,
 613                                void *secctx, __u32 secctxlen, ktime_t kstart)
 614 {
 615         struct inode             *inode = NULL;
 616         __u64                     bits = 0;
 617         int                       rc;
 618         struct dentry *alias;
 619         ENTRY;
 620
 621         /* NB 1 request reference will be taken away by ll_intent_lock()
 622          * when I return */
 623         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
 624                it->it_disposition);
 625         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 626                 struct req_capsule *pill = &request->rq_pill;
 627                 struct mdt_body *body = req_capsule_server_get(pill,
 628                                                                &RMF_MDT_BODY);
 629
 630                 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
 631                 if (rc)
 632                         RETURN(rc);
 633
 634                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
 635                 /* OPEN can return data if lock has DoM+LAYOUT bits set */
 636                 if (it->it_op & IT_OPEN &&
 637                     bits & MDS_INODELOCK_DOM && bits & MDS_INODELOCK_LAYOUT)
 638                         ll_dom_finish_open(inode, request);
 639
 640                 /* We used to query real size from OSTs here, but actually
 641                  * this is not needed. For stat() calls size would be updated
 642                  * from subsequent do_revalidate()->ll_inode_revalidate_it() in
 643                  * 2.4 and
 644                  * vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 645                  * Everybody else who needs correct file size would call
 646                  * ll_glimpse_size or some equivalent themselves anyway.
 647                  * Also see bug 7198.
 648                  */
 649
 650                 /* If security context was returned by MDT, put it in
 651                  * inode now to save an extra getxattr from security hooks,
 652                  * and avoid deadlock.
 653                  */
 654                 if (body->mbo_valid & OBD_MD_SECCTX) {
 655                         secctx = req_capsule_server_get(pill, &RMF_FILE_SECCTX);
 656                         secctxlen = req_capsule_get_size(pill,
 657                                                            &RMF_FILE_SECCTX,
 658                                                            RCL_SERVER);
 659
 660                         if (secctxlen)
 661                                 CDEBUG(D_SEC, "server returned security context"
 662                                        " for "DFID"\n",
 663                                        PFID(ll_inode2fid(inode)));
 664                 }
 665
 666                 if (secctx && secctxlen) {
 667                         inode_lock(inode);
 668                         rc = security_inode_notifysecctx(inode, secctx,
 669                                                          secctxlen);
 670                         inode_unlock(inode);
 671                         if (rc)
 672                                 CWARN("cannot set security context for "
 673                                       DFID": rc = %d\n",
 674                                       PFID(ll_inode2fid(inode)), rc);
 675                 }
 676         }
 677
 678         /* Only hash *de if it is unhashed (new dentry).
 679          * Atoimc_open may passin hashed dentries for open.
 680          */
 681         alias = ll_splice_alias(inode, *de);
 682         if (IS_ERR(alias))
 683                 GOTO(out, rc = PTR_ERR(alias));
 684
 685         *de = alias;
 686
 687         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 688                 /* we have lookup look - unhide dentry */
 689                 if (bits & MDS_INODELOCK_LOOKUP)
 690                         d_lustre_revalidate(*de);
 691         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
 692                 /*
 693                  * If file was created on the server, the dentry is revalidated
 694                  * in ll_create_it if the lock allows for it.
 695                  */
 696                 /* Check that parent has UPDATE lock. */
 697                 struct lookup_intent parent_it = {
 698                                         .it_op = IT_GETATTR,
 699                                         .it_lock_handle = 0 };
 700                 struct lu_fid   fid = ll_i2info(parent)->lli_fid;
 701
 702                 /* If it is striped directory, get the real stripe parent */
 703                 if (unlikely(ll_i2info(parent)->lli_lsm_md != NULL)) {
 704                         rc = md_get_fid_from_lsm(ll_i2mdexp(parent),
 705                                                  ll_i2info(parent)->lli_lsm_md,
 706                                                  (*de)->d_name.name,
 707                                                  (*de)->d_name.len, &fid);
 708                         if (rc != 0)
 709                                 GOTO(out, rc);
 710                 }
 711
 712                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it, &fid,
 713                                        NULL)) {
 714                         d_lustre_revalidate(*de);
 715                         ll_intent_release(&parent_it);
 716                 }
 717         }
 718
 719         if (it_disposition(it, DISP_OPEN_CREATE)) {
 720                 ll_stats_ops_tally(ll_i2sbi(parent), LPROC_LL_MKNOD,
 721                                    ktime_us_delta(ktime_get(), kstart));
 722         }
 723
 724         GOTO(out, rc = 0);
 725
 726 out:
 727         if (rc != 0 && it->it_op & IT_OPEN) {
 728                 ll_intent_drop_lock(it);
 729                 ll_open_cleanup((*de)->d_sb, request);
 730         }
 731
 732         return rc;
 733 }
 734
 735 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 736                                    struct lookup_intent *it,
 737                                    void **secctx, __u32 *secctxlen)
 738 {
 739         ktime_t kstart = ktime_get();
 740         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 741         struct dentry *save = dentry, *retval;
 742         struct ptlrpc_request *req = NULL;
 743         struct md_op_data *op_data = NULL;
 744         __u32 opc;
 745         int rc;
 746         char secctx_name[XATTR_NAME_MAX + 1];
 747
 748         ENTRY;
 749
 750         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 751                 RETURN(ERR_PTR(-ENAMETOOLONG));
 752
 753         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
 754                dentry->d_name.len, dentry->d_name.name,
 755                PFID(ll_inode2fid(parent)), parent, LL_IT2STR(it));
 756
 757         if (d_mountpoint(dentry))
 758                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 759
 760         if (it == NULL || it->it_op == IT_GETXATTR)
 761                 it = &lookup_it;
 762
 763         if (it->it_op == IT_GETATTR && dentry_may_statahead(parent, dentry)) {
 764                 rc = ll_statahead(parent, &dentry, 0);
 765                 if (rc == 1)
 766                         RETURN(dentry == save ? NULL : dentry);
 767         }
 768
 769         if (it->it_op & IT_OPEN && it->it_flags & FMODE_WRITE &&
 770             dentry->d_sb->s_flags & SB_RDONLY)
 771                 RETURN(ERR_PTR(-EROFS));
 772
 773         if (it->it_op & IT_CREAT)
 774                 opc = LUSTRE_OPC_CREATE;
 775         else
 776                 opc = LUSTRE_OPC_ANY;
 777
 778         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 779                                      dentry->d_name.len, 0, opc, NULL);
 780         if (IS_ERR(op_data))
 781                 GOTO(out, retval = ERR_CAST(op_data));
 782
 783         /* enforce umask if acl disabled or MDS doesn't support umask */
 784         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 785                 it->it_create_mode &= ~current_umask();
 786
 787         if (it->it_op & IT_CREAT &&
 788             ll_i2sbi(parent)->ll_flags & LL_SBI_FILE_SECCTX) {
 789                 rc = ll_dentry_init_security(dentry, it->it_create_mode,
 790                                              &dentry->d_name,
 791                                              &op_data->op_file_secctx_name,
 792                                              &op_data->op_file_secctx,
 793                                              &op_data->op_file_secctx_size);
 794                 if (rc < 0)
 795                         GOTO(out, retval = ERR_PTR(rc));
 796                 if (secctx)
 797                         *secctx = op_data->op_file_secctx;
 798                 if (secctxlen)
 799                         *secctxlen = op_data->op_file_secctx_size;
 800         } else {
 801                 if (secctx)
 802                         *secctx = NULL;
 803                 if (secctxlen)
 804                         *secctxlen = 0;
 805         }
 806
 807         /* ask for security context upon intent */
 808         if (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_OPEN)) {
 809                 /* get name of security xattr to request to server */
 810                 rc = ll_listsecurity(parent, secctx_name,
 811                                      sizeof(secctx_name));
 812                 if (rc < 0) {
 813                         CDEBUG(D_SEC, "cannot get security xattr name for "
 814                                DFID": rc = %d\n",
 815                                PFID(ll_inode2fid(parent)), rc);
 816                 } else if (rc > 0) {
 817                         op_data->op_file_secctx_name = secctx_name;
 818                         op_data->op_file_secctx_name_size = rc;
 819                         CDEBUG(D_SEC, "'%.*s' is security xattr for "DFID"\n",
 820                                rc, secctx_name, PFID(ll_inode2fid(parent)));
 821                 }
 822         }
 823
 824         rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
 825                             &ll_md_blocking_ast, 0);
 826         /* If the MDS allows the client to chgrp (CFS_SETGRP_PERM), but the
 827          * client does not know which suppgid should be sent to the MDS, or
 828          * some other(s) changed the target file's GID after this RPC sent
 829          * to the MDS with the suppgid as the original GID, then we should
 830          * try again with right suppgid. */
 831         if (rc == -EACCES && it->it_op & IT_OPEN &&
 832             it_disposition(it, DISP_OPEN_DENY)) {
 833                 struct mdt_body *body;
 834
 835                 LASSERT(req != NULL);
 836
 837                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 838                 if (op_data->op_suppgids[0] == body->mbo_gid ||
 839                     op_data->op_suppgids[1] == body->mbo_gid ||
 840                     !in_group_p(make_kgid(&init_user_ns, body->mbo_gid)))
 841                         GOTO(out, retval = ERR_PTR(-EACCES));
 842
 843                 fid_zero(&op_data->op_fid2);
 844                 op_data->op_suppgids[1] = body->mbo_gid;
 845                 ptlrpc_req_finished(req);
 846                 req = NULL;
 847                 ll_intent_release(it);
 848                 rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
 849                                     &ll_md_blocking_ast, 0);
 850         }
 851
 852         if (rc < 0)
 853                 GOTO(out, retval = ERR_PTR(rc));
 854
 855         /* dir layout may change */
 856         ll_unlock_md_op_lsm(op_data);
 857         rc = ll_lookup_it_finish(req, it, parent, &dentry,
 858                                  secctx ? *secctx : NULL,
 859                                  secctxlen ? *secctxlen : 0, kstart);
 860         if (rc != 0) {
 861                 ll_intent_release(it);
 862                 GOTO(out, retval = ERR_PTR(rc));
 863         }
 864
 865         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 866             !S_ISREG(dentry->d_inode->i_mode) &&
 867             !S_ISDIR(dentry->d_inode->i_mode)) {
 868                 ll_release_openhandle(dentry, it);
 869         }
 870         ll_lookup_finish_locks(it, dentry);
 871
 872         GOTO(out, retval = (dentry == save) ? NULL : dentry);
 873
 874 out:
 875         if (op_data != NULL && !IS_ERR(op_data)) {
 876                 if (secctx && secctxlen) {
 877                         /* caller needs sec ctx info, so reset it in op_data to
 878                          * prevent it from being freed */
 879                         op_data->op_file_secctx = NULL;
 880                         op_data->op_file_secctx_size = 0;
 881                 }
 882                 ll_finish_md_op_data(op_data);
 883         }
 884
 885         ptlrpc_req_finished(req);
 886         return retval;
 887 }
 888
 889 #ifdef HAVE_IOP_ATOMIC_OPEN
 890 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 891                                    unsigned int flags)
 892 {
 893         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
 894         struct dentry *de;
 895
 896         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), flags=%u\n",
 897                dentry->d_name.len, dentry->d_name.name,
 898                PFID(ll_inode2fid(parent)), parent, flags);
 899
 900         /*
 901          * Optimize away (CREATE && !OPEN). Let .create handle the race.
 902          * but only if we have write permissions there, otherwise we need
 903          * to proceed with lookup. LU-4185
 904          */
 905         if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN) &&
 906             (inode_permission(parent, MAY_WRITE | MAY_EXEC) == 0))
 907                 return NULL;
 908
 909         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
 910                 itp = NULL;
 911         else
 912                 itp = &it;
 913         de = ll_lookup_it(parent, dentry, itp, NULL, NULL);
 914
 915         if (itp != NULL)
 916                 ll_intent_release(itp);
 917
 918         return de;
 919 }
 920
 921 #ifdef FMODE_CREATED /* added in Linux v4.18-rc1-20-g73a09dd */
 922 # define ll_is_opened(o, f)             ((f)->f_mode & FMODE_OPENED)
 923 # define ll_finish_open(f, d, o)        finish_open((f), (d), NULL)
 924 # define ll_last_arg
 925 # define ll_set_created(o, f)                                           \
 926 do {                                                                    \
 927         (f)->f_mode |= FMODE_CREATED;                                   \
 928 } while (0)
 929
 930 #else
 931 # define ll_is_opened(o, f)             (*(o))
 932 # define ll_finish_open(f, d, o)        finish_open((f), (d), NULL, (o))
 933 # define ll_last_arg                    , int *opened
 934 # define ll_set_created(o, f)                                           \
 935 do {                                                                    \
 936         *(o) |= FILE_CREATED;                                           \
 937 } while (0)
 938
 939 #endif
 940
 941 /*
 942  * For cached negative dentry and new dentry, handle lookup/create/open
 943  * together.
 944  */
 945 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
 946                           struct file *file, unsigned open_flags,
 947                           umode_t mode ll_last_arg)
 948 {
 949         struct lookup_intent *it;
 950         struct dentry *de;
 951         long long lookup_flags = LOOKUP_OPEN;
 952         void *secctx = NULL;
 953         __u32 secctxlen = 0;
 954         int rc = 0;
 955         ENTRY;
 956
 957         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), file %p,"
 958                            "open_flags %x, mode %x opened %d\n",
 959                dentry->d_name.len, dentry->d_name.name,
 960                PFID(ll_inode2fid(dir)), dir, file, open_flags, mode,
 961                ll_is_opened(opened, file));
 962
 963         /* Only negative dentries enter here */
 964         LASSERT(dentry->d_inode == NULL);
 965
 966         if (!d_unhashed(dentry)) {
 967                 /* A valid negative dentry that just passed revalidation,
 968                  * there's little point to try and open it server-side,
 969                  * even though there's a minuscule chance it might succeed.
 970                  * Either way it's a valid race to just return -ENOENT here.
 971                  */
 972                 if (!(open_flags & O_CREAT))
 973                         return -ENOENT;
 974
 975                 /* Otherwise we just unhash it to be rehashed afresh via
 976                  * lookup if necessary
 977                  */
 978                 d_drop(dentry);
 979         }
 980
 981         OBD_ALLOC(it, sizeof(*it));
 982         if (!it)
 983                 RETURN(-ENOMEM);
 984
 985         it->it_op = IT_OPEN;
 986         if (open_flags & O_CREAT) {
 987                 it->it_op |= IT_CREAT;
 988                 lookup_flags |= LOOKUP_CREATE;
 989         }
 990         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
 991         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
 992         it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
 993
 994         /* Dentry added to dcache tree in ll_lookup_it */
 995         de = ll_lookup_it(dir, dentry, it, &secctx, &secctxlen);
 996         if (IS_ERR(de))
 997                 rc = PTR_ERR(de);
 998         else if (de != NULL)
 999                 dentry = de;
1000
1001         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1002
1003         if (!rc) {
1004                 if (it_disposition(it, DISP_OPEN_CREATE)) {
1005                         /* Dentry instantiated in ll_create_it. */
1006                         rc = ll_create_it(dir, dentry, it, secctx, secctxlen);
1007                         security_release_secctx(secctx, secctxlen);
1008                         if (rc) {
1009                                 /* We dget in ll_splice_alias. */
1010                                 if (de != NULL)
1011                                         dput(de);
1012                                 goto out_release;
1013                         }
1014                         ll_set_created(opened, file);
1015                 }
1016                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
1017                         /* Open dentry. */
1018                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
1019                                 /* We cannot call open here as it might
1020                                  * deadlock. This case is unreachable in
1021                                  * practice because of OBD_CONNECT_NODEVOH. */
1022                                 rc = finish_no_open(file, de);
1023                         } else {
1024                                 file->private_data = it;
1025                                 rc = ll_finish_open(file, dentry, opened);
1026                                 /* We dget in ll_splice_alias. finish_open takes
1027                                  * care of dget for fd open.
1028                                  */
1029                                 if (de != NULL)
1030                                         dput(de);
1031                         }
1032                 } else {
1033                         rc = finish_no_open(file, de);
1034                 }
1035         }
1036
1037 out_release:
1038         ll_intent_release(it);
1039         OBD_FREE(it, sizeof(*it));
1040
1041         RETURN(rc);
1042 }
1043
1044 #else /* !HAVE_IOP_ATOMIC_OPEN */
1045 static struct lookup_intent *
1046 ll_convert_intent(struct open_intent *oit, int lookup_flags, bool is_readonly)
1047 {
1048         struct lookup_intent *it;
1049
1050         OBD_ALLOC_PTR(it);
1051         if (!it)
1052                 return ERR_PTR(-ENOMEM);
1053
1054         if (lookup_flags & LOOKUP_OPEN) {
1055                 it->it_op = IT_OPEN;
1056                 /* Avoid file creation for ro bind mount point(is_readonly) */
1057                 if ((lookup_flags & LOOKUP_CREATE) && !is_readonly)
1058                         it->it_op |= IT_CREAT;
1059                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
1060                 it->it_flags = ll_namei_to_lookup_intent_flag(oit->flags &
1061                                                 ~(is_readonly ? O_CREAT : 0));
1062                 it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
1063         } else {
1064                 it->it_op = IT_GETATTR;
1065         }
1066
1067         return it;
1068 }
1069
1070 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
1071                                    struct nameidata *nd)
1072 {
1073         struct dentry *de;
1074         ENTRY;
1075
1076         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
1077                 struct lookup_intent *it;
1078
1079                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
1080                         it = ll_d2d(dentry)->lld_it;
1081                         ll_d2d(dentry)->lld_it = NULL;
1082                 } else {
1083                         /*
1084                          * Optimize away (CREATE && !OPEN). Let .create handle
1085                          * the race. But only if we have write permissions
1086                          * there, otherwise we need to proceed with lookup.
1087                          * LU-4185
1088                          */
1089                         if ((nd->flags & LOOKUP_CREATE) &&
1090                             !(nd->flags & LOOKUP_OPEN) &&
1091                             (inode_permission(parent,
1092                                               MAY_WRITE | MAY_EXEC) == 0))
1093                                 RETURN(NULL);
1094
1095                         it = ll_convert_intent(&nd->intent.open, nd->flags,
1096                                 (nd->path.mnt->mnt_flags & MNT_READONLY) ||
1097                                 (nd->path.mnt->mnt_sb->s_flags & SB_RDONLY));
1098                         if (IS_ERR(it))
1099                                 RETURN((struct dentry *)it);
1100                 }
1101
1102                 de = ll_lookup_it(parent, dentry, it, NULL, NULL);
1103                 if (de)
1104                         dentry = de;
1105                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
1106                         if (dentry->d_inode &&
1107                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
1108                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
1109                                         /* We cannot call open here as it might
1110                                          * deadlock. This case is unreachable in
1111                                          * practice because of
1112                                          * OBD_CONNECT_NODEVOH. */
1113                                 } else {
1114                                         struct file *filp;
1115
1116                                         nd->intent.open.file->private_data = it;
1117                                         filp = lookup_instantiate_filp(nd,
1118                                                                        dentry,
1119                                                                        NULL);
1120                                         if (IS_ERR(filp)) {
1121                                                 if (de)
1122                                                         dput(de);
1123                                                 de = (struct dentry *)filp;
1124                                         }
1125                                 }
1126                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
1127                                 /* XXX This can only reliably work on assumption
1128                                  * that there are NO hashed negative dentries.*/
1129                                 ll_d2d(dentry)->lld_it = it;
1130                                 it = NULL; /* Will be freed in ll_create_nd */
1131                                 /* We absolutely depend on ll_create_nd to be
1132                                  * called to not leak this intent and possible
1133                                  * data attached to it */
1134                         }
1135                 }
1136
1137                 if (it) {
1138                         ll_intent_release(it);
1139                         OBD_FREE(it, sizeof(*it));
1140                 }
1141         } else {
1142                 de = ll_lookup_it(parent, dentry, NULL, NULL, NULL);
1143         }
1144
1145         RETURN(de);
1146 }
1147 #endif /* HAVE_IOP_ATOMIC_OPEN */
1148
1149 /* We depend on "mode" being set with the proper file type/umask by now */
1150 static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
1151 {
1152         struct inode *inode = NULL;
1153         struct ptlrpc_request *request = NULL;
1154         struct ll_sb_info *sbi = ll_i2sbi(dir);
1155         int rc;
1156         ENTRY;
1157
1158         LASSERT(it && it->it_disposition);
1159
1160         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
1161         request = it->it_request;
1162         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
1163         rc = ll_prep_inode(&inode, request, dir->i_sb, it);
1164         if (rc)
1165                 GOTO(out, inode = ERR_PTR(rc));
1166
1167         /* Pause to allow for a race with concurrent access by fid */
1168         OBD_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_NODE_PAUSE, cfs_fail_val);
1169
1170         /* We asked for a lock on the directory, but were granted a
1171          * lock on the inode.  Since we finally have an inode pointer,
1172          * stuff it in the lock. */
1173         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode "DFID"(%p)\n",
1174                PFID(ll_inode2fid(inode)), inode);
1175         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
1176         EXIT;
1177  out:
1178         ptlrpc_req_finished(request);
1179         return inode;
1180 }
1181
1182 /*
1183  * By the time this is called, we already have created the directory cache
1184  * entry for the new file, but it is so far negative - it has no inode.
1185  *
1186  * We defer creating the OBD object(s) until open, to keep the intent and
1187  * non-intent code paths similar, and also because we do not have the MDS
1188  * inode number before calling ll_create_node() (which is needed for LOV),
1189  * so we would need to do yet another RPC to the MDS to store the LOV EA
1190  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
1191  * lmm_size in datalen (the MDS still has code which will handle that).
1192  *
1193  * If the create succeeds, we fill in the inode information
1194  * with d_instantiate().
1195  */
1196 static int ll_create_it(struct inode *dir, struct dentry *dentry,
1197                         struct lookup_intent *it,
1198                         void *secctx, __u32 secctxlen)
1199 {
1200         struct inode *inode;
1201         __u64 bits = 0;
1202         int rc = 0;
1203         ENTRY;
1204
1205         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
1206                dentry->d_name.len, dentry->d_name.name,
1207                PFID(ll_inode2fid(dir)), dir, LL_IT2STR(it));
1208
1209         rc = it_open_error(DISP_OPEN_CREATE, it);
1210         if (rc)
1211                 RETURN(rc);
1212
1213         inode = ll_create_node(dir, it);
1214         if (IS_ERR(inode))
1215                 RETURN(PTR_ERR(inode));
1216
1217         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX) && secctx) {
1218                 inode_lock(inode);
1219                 /* must be done before d_instantiate, because it calls
1220                  * security_d_instantiate, which means a getxattr if security
1221                  * context is not set yet */
1222                 rc = security_inode_notifysecctx(inode, secctx, secctxlen);
1223                 inode_unlock(inode);
1224                 if (rc)
1225                         RETURN(rc);
1226         }
1227
1228         d_instantiate(dentry, inode);
1229
1230         if (!(ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX)) {
1231                 rc = ll_inode_init_security(dentry, inode, dir);
1232                 if (rc)
1233                         RETURN(rc);
1234         }
1235
1236         ll_set_lock_data(ll_i2sbi(dir)->ll_md_exp, inode, it, &bits);
1237         if (bits & MDS_INODELOCK_LOOKUP)
1238                 d_lustre_revalidate(dentry);
1239
1240         RETURN(0);
1241 }
1242
1243 void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
1244 {
1245         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
1246                                                        &RMF_MDT_BODY);
1247
1248         LASSERT(body);
1249         if (body->mbo_valid & OBD_MD_FLMTIME &&
1250             body->mbo_mtime > inode->i_mtime.tv_sec) {
1251                 CDEBUG(D_INODE,
1252                        "setting fid " DFID " mtime from %lld to %llu\n",
1253                        PFID(ll_inode2fid(inode)),
1254                        (s64)inode->i_mtime.tv_sec, body->mbo_mtime);
1255                 inode->i_mtime.tv_sec = body->mbo_mtime;
1256         }
1257
1258         if (body->mbo_valid & OBD_MD_FLCTIME &&
1259             body->mbo_ctime > inode->i_ctime.tv_sec)
1260                 inode->i_ctime.tv_sec = body->mbo_ctime;
1261 }
1262
1263 static int ll_new_node(struct inode *dir, struct dentry *dchild,
1264                        const char *tgt, umode_t mode, int rdev, __u32 opc)
1265 {
1266         struct qstr *name = &dchild->d_name;
1267         struct ptlrpc_request *request = NULL;
1268         struct md_op_data *op_data;
1269         struct inode *inode = NULL;
1270         struct ll_sb_info *sbi = ll_i2sbi(dir);
1271         int tgt_len = 0;
1272         int err;
1273
1274         ENTRY;
1275         if (unlikely(tgt != NULL))
1276                 tgt_len = strlen(tgt) + 1;
1277
1278 again:
1279         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1280                                      name->len, 0, opc, NULL);
1281         if (IS_ERR(op_data))
1282                 GOTO(err_exit, err = PTR_ERR(op_data));
1283
1284         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1285                 err = ll_dentry_init_security(dchild, mode, &dchild->d_name,
1286                                               &op_data->op_file_secctx_name,
1287                                               &op_data->op_file_secctx,
1288                                               &op_data->op_file_secctx_size);
1289                 if (err < 0)
1290                         GOTO(err_exit, err);
1291         }
1292
1293         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
1294                         from_kuid(&init_user_ns, current_fsuid()),
1295                         from_kgid(&init_user_ns, current_fsgid()),
1296                         cfs_curproc_cap_pack(), rdev, &request);
1297         if (err < 0 && err != -EREMOTE)
1298                 GOTO(err_exit, err);
1299
1300         /* If the client doesn't know where to create a subdirectory (or
1301          * in case of a race that sends the RPC to the wrong MDS), the
1302          * MDS will return -EREMOTE and the client will fetch the layout
1303          * of the directory, then create the directory on the right MDT. */
1304         if (unlikely(err == -EREMOTE)) {
1305                 struct ll_inode_info    *lli = ll_i2info(dir);
1306                 struct lmv_user_md      *lum;
1307                 int                     lumsize;
1308                 int                     err2;
1309
1310                 ptlrpc_req_finished(request);
1311                 request = NULL;
1312
1313                 err2 = ll_dir_getstripe(dir, (void **)&lum, &lumsize, &request,
1314                                         OBD_MD_DEFAULT_MEA);
1315                 if (err2 == 0) {
1316                         /* Update stripe_offset and retry */
1317                         lli->lli_def_stripe_offset = lum->lum_stripe_offset;
1318                 } else if (err2 == -ENODATA &&
1319                            lli->lli_def_stripe_offset != -1) {
1320                         /* If there are no default stripe EA on the MDT, but the
1321                          * client has default stripe, then it probably means
1322                          * default stripe EA has just been deleted. */
1323                         lli->lli_def_stripe_offset = -1;
1324                 } else {
1325                         GOTO(err_exit, err);
1326                 }
1327
1328                 ptlrpc_req_finished(request);
1329                 request = NULL;
1330                 ll_finish_md_op_data(op_data);
1331                 goto again;
1332         }
1333
1334         ll_update_times(request, dir);
1335
1336         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_NEWNODE_PAUSE, cfs_fail_val);
1337
1338         err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
1339         if (err)
1340                 GOTO(err_exit, err);
1341
1342         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1343                 inode_lock(inode);
1344                 /* must be done before d_instantiate, because it calls
1345                  * security_d_instantiate, which means a getxattr if security
1346                  * context is not set yet */
1347                 err = security_inode_notifysecctx(inode,
1348                                                   op_data->op_file_secctx,
1349                                                   op_data->op_file_secctx_size);
1350                 inode_unlock(inode);
1351                 if (err)
1352                         GOTO(err_exit, err);
1353         }
1354
1355         d_instantiate(dchild, inode);
1356
1357         if (!(sbi->ll_flags & LL_SBI_FILE_SECCTX)) {
1358                 err = ll_inode_init_security(dchild, inode, dir);
1359                 if (err)
1360                         GOTO(err_exit, err);
1361         }
1362
1363         EXIT;
1364 err_exit:
1365         if (request != NULL)
1366                 ptlrpc_req_finished(request);
1367
1368         if (!IS_ERR_OR_NULL(op_data))
1369                 ll_finish_md_op_data(op_data);
1370
1371         return err;
1372 }
1373
1374 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1375                     dev_t rdev)
1376 {
1377         struct qstr *name = &dchild->d_name;
1378         int err;
1379         ENTRY;
1380
1381         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p) mode %o dev %x\n",
1382                name->len, name->name, PFID(ll_inode2fid(dir)), dir,
1383                mode, rdev);
1384
1385         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1386                 mode &= ~current_umask();
1387
1388         switch (mode & S_IFMT) {
1389         case 0:
1390                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
1391         case S_IFREG:
1392         case S_IFCHR:
1393         case S_IFBLK:
1394         case S_IFIFO:
1395         case S_IFSOCK:
1396                 err = ll_new_node(dir, dchild, NULL, mode, old_encode_dev(rdev),
1397                                   LUSTRE_OPC_MKNOD);
1398                 break;
1399         case S_IFDIR:
1400                 err = -EPERM;
1401                 break;
1402         default:
1403                 err = -EINVAL;
1404         }
1405
1406         if (!err)
1407                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
1408
1409         RETURN(err);
1410 }
1411
1412 #ifdef HAVE_IOP_ATOMIC_OPEN
1413 /*
1414  * Plain create. Intent create is handled in atomic_open.
1415  */
1416 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1417                         umode_t mode, bool want_excl)
1418 {
1419         int rc;
1420
1421         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1422
1423         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), "
1424                            "flags=%u, excl=%d\n", dentry->d_name.len,
1425                dentry->d_name.name, PFID(ll_inode2fid(dir)),
1426                dir, mode, want_excl);
1427
1428         /* Using mknod(2) to create a regular file is designed to not recognize
1429          * volatile file name, so we use ll_mknod() here. */
1430         rc = ll_mknod(dir, dentry, mode, 0);
1431
1432         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1433
1434         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
1435                dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
1436
1437         return rc;
1438 }
1439 #else /* !HAVE_IOP_ATOMIC_OPEN */
1440 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1441                         ll_umode_t mode, struct nameidata *nd)
1442 {
1443         struct ll_dentry_data *lld = ll_d2d(dentry);
1444         struct lookup_intent *it = NULL;
1445         int rc;
1446
1447         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1448
1449         if (lld != NULL)
1450                 it = lld->lld_it;
1451
1452         if (!it) {
1453                 /* LU-8559: use LUSTRE_OPC_CREATE for non atomic open case
1454                  * so that volatile file name is recoginized.
1455                  * Mknod(2), however, is designed to not recognize volatile
1456                  * file name to avoid inode leak under orphan directory until
1457                  * MDT reboot */
1458                 return ll_new_node(dir, dentry, NULL, mode, 0,
1459                                    LUSTRE_OPC_CREATE);
1460         }
1461
1462         lld->lld_it = NULL;
1463
1464         /* Was there an error? Propagate it! */
1465         if (it->it_status) {
1466                 rc = it->it_status;
1467                 goto out;
1468         }
1469
1470         rc = ll_create_it(dir, dentry, it, NULL, 0);
1471         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
1472                 struct file *filp;
1473
1474                 nd->intent.open.file->private_data = it;
1475                 filp = lookup_instantiate_filp(nd, dentry, NULL);
1476                 if (IS_ERR(filp))
1477                         rc = PTR_ERR(filp);
1478         }
1479
1480 out:
1481         ll_intent_release(it);
1482         OBD_FREE(it, sizeof(*it));
1483
1484         if (!rc)
1485                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1486
1487         return rc;
1488 }
1489 #endif /* HAVE_IOP_ATOMIC_OPEN */
1490
1491 static int ll_symlink(struct inode *dir, struct dentry *dchild,
1492                       const char *oldpath)
1493 {
1494         struct qstr *name = &dchild->d_name;
1495         int err;
1496         ENTRY;
1497
1498         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), target=%.*s\n",
1499                name->len, name->name, PFID(ll_inode2fid(dir)),
1500                dir, 3000, oldpath);
1501
1502         err = ll_new_node(dir, dchild, oldpath, S_IFLNK | S_IRWXUGO, 0,
1503                           LUSTRE_OPC_SYMLINK);
1504
1505         if (!err)
1506                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
1507
1508         RETURN(err);
1509 }
1510
1511 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1512                    struct dentry *new_dentry)
1513 {
1514         struct inode *src = old_dentry->d_inode;
1515         struct qstr *name = &new_dentry->d_name;
1516         struct ll_sb_info *sbi = ll_i2sbi(dir);
1517         struct ptlrpc_request *request = NULL;
1518         struct md_op_data *op_data;
1519         int err;
1520
1521         ENTRY;
1522         CDEBUG(D_VFSTRACE, "VFS Op: inode="DFID"(%p), dir="DFID"(%p), "
1523                "target=%.*s\n", PFID(ll_inode2fid(src)), src,
1524                PFID(ll_inode2fid(dir)), dir, name->len, name->name);
1525
1526         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1527                                      0, LUSTRE_OPC_ANY, NULL);
1528         if (IS_ERR(op_data))
1529                 RETURN(PTR_ERR(op_data));
1530
1531         err = md_link(sbi->ll_md_exp, op_data, &request);
1532         ll_finish_md_op_data(op_data);
1533         if (err)
1534                 GOTO(out, err);
1535
1536         ll_update_times(request, dir);
1537         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
1538         EXIT;
1539 out:
1540         ptlrpc_req_finished(request);
1541         RETURN(err);
1542 }
1543
1544 static int ll_mkdir(struct inode *dir, struct dentry *dchild, ll_umode_t mode)
1545 {
1546         struct qstr *name = &dchild->d_name;
1547         int err;
1548         ENTRY;
1549
1550         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1551                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1552
1553         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1554                 mode &= ~current_umask();
1555
1556         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1557
1558         err = ll_new_node(dir, dchild, NULL, mode, 0, LUSTRE_OPC_MKDIR);
1559         if (err == 0)
1560                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
1561
1562         RETURN(err);
1563 }
1564
1565 static int ll_rmdir(struct inode *dir, struct dentry *dchild)
1566 {
1567         struct qstr *name = &dchild->d_name;
1568         struct ptlrpc_request *request = NULL;
1569         struct md_op_data *op_data;
1570         int rc;
1571         ENTRY;
1572
1573         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1574                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1575
1576         if (unlikely(d_mountpoint(dchild)))
1577                 RETURN(-EBUSY);
1578
1579         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1580                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1581         if (IS_ERR(op_data))
1582                 RETURN(PTR_ERR(op_data));
1583
1584         if (dchild->d_inode != NULL)
1585                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1586
1587         op_data->op_fid2 = op_data->op_fid3;
1588         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1589         ll_finish_md_op_data(op_data);
1590         if (rc == 0) {
1591                 ll_update_times(request, dir);
1592                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1593         }
1594
1595         ptlrpc_req_finished(request);
1596         RETURN(rc);
1597 }
1598
1599 /**
1600  * Remove dir entry
1601  **/
1602 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1603 {
1604         struct ptlrpc_request *request = NULL;
1605         struct md_op_data *op_data;
1606         int rc;
1607         ENTRY;
1608
1609         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1610                namelen, name, PFID(ll_inode2fid(dir)), dir);
1611
1612         op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1613                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1614         if (IS_ERR(op_data))
1615                 RETURN(PTR_ERR(op_data));
1616         op_data->op_cli_flags |= CLI_RM_ENTRY;
1617         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1618         ll_finish_md_op_data(op_data);
1619         if (rc == 0) {
1620                 ll_update_times(request, dir);
1621                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1622         }
1623
1624         ptlrpc_req_finished(request);
1625         RETURN(rc);
1626 }
1627
1628 static int ll_unlink(struct inode *dir, struct dentry *dchild)
1629 {
1630         struct qstr *name = &dchild->d_name;
1631         struct ptlrpc_request *request = NULL;
1632         struct md_op_data *op_data;
1633         struct mdt_body *body;
1634         int rc;
1635         ENTRY;
1636         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1637                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1638
1639         /*
1640          * XXX: unlink bind mountpoint maybe call to here,
1641          * just check it as vfs_unlink does.
1642          */
1643         if (unlikely(d_mountpoint(dchild)))
1644                 RETURN(-EBUSY);
1645
1646         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len, 0,
1647                                      LUSTRE_OPC_ANY, NULL);
1648         if (IS_ERR(op_data))
1649                 RETURN(PTR_ERR(op_data));
1650
1651         op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1652
1653         op_data->op_fid2 = op_data->op_fid3;
1654         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1655         ll_finish_md_op_data(op_data);
1656         if (rc)
1657                 GOTO(out, rc);
1658
1659         /*
1660          * The server puts attributes in on the last unlink, use them to update
1661          * the link count so the inode can be freed immediately.
1662          */
1663         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1664         if (body->mbo_valid & OBD_MD_FLNLINK)
1665                 set_nlink(dchild->d_inode, body->mbo_nlink);
1666
1667         ll_update_times(request, dir);
1668         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1669
1670 out:
1671         ptlrpc_req_finished(request);
1672         RETURN(rc);
1673 }
1674
1675 static int ll_rename(struct inode *src, struct dentry *src_dchild,
1676                      struct inode *tgt, struct dentry *tgt_dchild
1677 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
1678                      , unsigned int flags
1679 #endif
1680                      )
1681 {
1682         struct qstr *src_name = &src_dchild->d_name;
1683         struct qstr *tgt_name = &tgt_dchild->d_name;
1684         struct ptlrpc_request *request = NULL;
1685         struct ll_sb_info *sbi = ll_i2sbi(src);
1686         struct md_op_data *op_data;
1687         int err;
1688         ENTRY;
1689
1690 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
1691         if (flags)
1692                 return -EINVAL;
1693 #endif
1694
1695         CDEBUG(D_VFSTRACE, "VFS Op:oldname=%.*s, src_dir="DFID
1696                "(%p), newname=%.*s, tgt_dir="DFID"(%p)\n",
1697                src_name->len, src_name->name,
1698                PFID(ll_inode2fid(src)), src, tgt_name->len,
1699                tgt_name->name, PFID(ll_inode2fid(tgt)), tgt);
1700
1701         if (unlikely(d_mountpoint(src_dchild) || d_mountpoint(tgt_dchild)))
1702                 RETURN(-EBUSY);
1703
1704         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1705                                      LUSTRE_OPC_ANY, NULL);
1706         if (IS_ERR(op_data))
1707                 RETURN(PTR_ERR(op_data));
1708
1709         if (src_dchild->d_inode != NULL)
1710                 op_data->op_fid3 = *ll_inode2fid(src_dchild->d_inode);
1711
1712         if (tgt_dchild->d_inode != NULL)
1713                 op_data->op_fid4 = *ll_inode2fid(tgt_dchild->d_inode);
1714
1715         err = md_rename(sbi->ll_md_exp, op_data,
1716                         src_name->name, src_name->len,
1717                         tgt_name->name, tgt_name->len, &request);
1718         ll_finish_md_op_data(op_data);
1719         if (!err) {
1720                 ll_update_times(request, src);
1721                 ll_update_times(request, tgt);
1722                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1723         }
1724
1725         ptlrpc_req_finished(request);
1726
1727         if (err == 0)
1728                 d_move(src_dchild, tgt_dchild);
1729
1730         RETURN(err);
1731 }
1732
1733 const struct inode_operations ll_dir_inode_operations = {
1734         .mknod          = ll_mknod,
1735 #ifdef HAVE_IOP_ATOMIC_OPEN
1736         .atomic_open    = ll_atomic_open,
1737 #endif
1738         .lookup         = ll_lookup_nd,
1739         .create         = ll_create_nd,
1740         /* We need all these non-raw things for NFSD, to not patch it. */
1741         .unlink         = ll_unlink,
1742         .mkdir          = ll_mkdir,
1743         .rmdir          = ll_rmdir,
1744         .symlink        = ll_symlink,
1745         .link           = ll_link,
1746         .rename         = ll_rename,
1747         .setattr        = ll_setattr,
1748         .getattr        = ll_getattr,
1749         .permission     = ll_inode_permission,
1750 #ifdef HAVE_IOP_XATTR
1751         .setxattr       = ll_setxattr,
1752         .getxattr       = ll_getxattr,
1753         .removexattr    = ll_removexattr,
1754 #endif
1755         .listxattr      = ll_listxattr,
1756 #ifdef HAVE_IOP_GET_ACL
1757         .get_acl        = ll_get_acl,
1758 #endif
1759 #ifdef HAVE_IOP_SET_ACL
1760         .set_acl        = ll_set_acl,
1761 #endif
1762 };
1763
1764 const struct inode_operations ll_special_inode_operations = {
1765         .setattr        = ll_setattr,
1766         .getattr        = ll_getattr,
1767         .permission     = ll_inode_permission,
1768 #ifdef HAVE_IOP_XATTR
1769         .setxattr       = ll_setxattr,
1770         .getxattr       = ll_getxattr,
1771         .removexattr    = ll_removexattr,
1772 #endif
1773         .listxattr      = ll_listxattr,
1774 #ifdef HAVE_IOP_GET_ACL
1775         .get_acl        = ll_get_acl,
1776 #endif
1777 #ifdef HAVE_IOP_SET_ACL
1778         .set_acl        = ll_set_acl,
1779 #endif
1780 };