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         spin_lock(&dir->i_lock);
 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         spin_unlock(&dir->i_lock);
 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         if (!lli->lli_clob) {
 196                 /* due to DoM read on open, there may exist pages for Lustre
 197                  * regular file even though cl_object is not set up yet. */
 198                 truncate_inode_pages(inode->i_mapping, 0);
 199                 RETURN(0);
 200         }
 201
 202         env = cl_env_get(&refcheck);
 203         if (IS_ERR(env))
 204                 RETURN(PTR_ERR(env));
 205
 206         /* reach MDC layer to flush data under  the DoM ldlm lock */
 207         rc = cl_object_flush(env, lli->lli_clob, lock);
 208         if (rc == -ENODATA) {
 209                 CDEBUG(D_INODE, "inode "DFID" layout has no DoM stripe\n",
 210                        PFID(ll_inode2fid(inode)));
 211                 /* most likely result of layout change, do nothing */
 212                 rc = 0;
 213         }
 214
 215         cl_env_put(env, &refcheck);
 216         RETURN(rc);
 217 }
 218
 219 static void ll_lock_cancel_bits(struct ldlm_lock *lock, __u64 to_cancel)
 220 {
 221         struct inode *inode = ll_inode_from_resource_lock(lock);
 222         struct ll_inode_info *lli;
 223         __u64 bits = to_cancel;
 224         int rc;
 225
 226         ENTRY;
 227
 228         if (!inode) {
 229                 /* That means the inode is evicted most likely and may cause
 230                  * the skipping of lock cleanups below, so print the message
 231                  * about that in log.
 232                  */
 233                 if (lock->l_resource->lr_lvb_inode)
 234                         LDLM_DEBUG(lock,
 235                                    "can't take inode for the lock (%sevicted)\n",
 236                                    lock->l_resource->lr_lvb_inode->i_state &
 237                                    I_FREEING ? "" : "not ");
 238                 RETURN_EXIT;
 239         }
 240
 241         if (!fid_res_name_eq(ll_inode2fid(inode),
 242                              &lock->l_resource->lr_name)) {
 243                 LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
 244                            PFID(ll_inode2fid(inode)), inode);
 245                 LBUG();
 246         }
 247
 248         if (bits & MDS_INODELOCK_XATTR) {
 249                 ll_xattr_cache_destroy(inode);
 250                 bits &= ~MDS_INODELOCK_XATTR;
 251         }
 252
 253         /* For OPEN locks we differentiate between lock modes
 254          * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
 255         if (bits & MDS_INODELOCK_OPEN)
 256                 ll_have_md_lock(inode, &bits, lock->l_req_mode);
 257
 258         if (bits & MDS_INODELOCK_OPEN) {
 259                 fmode_t fmode;
 260
 261                 switch (lock->l_req_mode) {
 262                 case LCK_CW:
 263                         fmode = FMODE_WRITE;
 264                         break;
 265                 case LCK_PR:
 266                         fmode = FMODE_EXEC;
 267                         break;
 268                 case LCK_CR:
 269                         fmode = FMODE_READ;
 270                         break;
 271                 default:
 272                         LDLM_ERROR(lock, "bad lock mode for OPEN lock");
 273                         LBUG();
 274                 }
 275
 276                 ll_md_real_close(inode, fmode);
 277
 278                 bits &= ~MDS_INODELOCK_OPEN;
 279         }
 280
 281         if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
 282                     MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM |
 283                     MDS_INODELOCK_DOM))
 284                 ll_have_md_lock(inode, &bits, LCK_MINMODE);
 285
 286         if (bits & MDS_INODELOCK_DOM) {
 287                 rc =  ll_dom_lock_cancel(inode, lock);
 288                 if (rc < 0)
 289                         CDEBUG(D_INODE, "cannot flush DoM data "
 290                                DFID": rc = %d\n",
 291                                PFID(ll_inode2fid(inode)), rc);
 292         }
 293
 294         if (bits & MDS_INODELOCK_LAYOUT) {
 295                 struct cl_object_conf conf = {
 296                         .coc_opc = OBJECT_CONF_INVALIDATE,
 297                         .coc_inode = inode,
 298                 };
 299
 300                 rc = ll_layout_conf(inode, &conf);
 301                 if (rc < 0)
 302                         CDEBUG(D_INODE, "cannot invalidate layout of "
 303                                DFID": rc = %d\n",
 304                                PFID(ll_inode2fid(inode)), rc);
 305         }
 306
 307         lli = ll_i2info(inode);
 308
 309         if (bits & MDS_INODELOCK_UPDATE)
 310                 lli->lli_update_atime = 1;
 311
 312         if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
 313                 CDEBUG(D_INODE, "invalidating inode "DFID" lli = %p, "
 314                        "pfid  = "DFID"\n", PFID(ll_inode2fid(inode)),
 315                        lli, PFID(&lli->lli_pfid));
 316                 truncate_inode_pages(inode->i_mapping, 0);
 317
 318                 if (unlikely(!fid_is_zero(&lli->lli_pfid))) {
 319                         struct inode *master_inode = NULL;
 320                         unsigned long hash;
 321
 322                         /* This is slave inode, since all of the child dentry
 323                          * is connected on the master inode, so we have to
 324                          * invalidate the negative children on master inode */
 325                         CDEBUG(D_INODE, "Invalidate s"DFID" m"DFID"\n",
 326                                PFID(ll_inode2fid(inode)), PFID(&lli->lli_pfid));
 327
 328                         hash = cl_fid_build_ino(&lli->lli_pfid,
 329                                         ll_need_32bit_api(ll_i2sbi(inode)));
 330
 331                         /* Do not lookup the inode with ilookup5, otherwise
 332                          * it will cause dead lock,
 333                          * 1. Client1 send chmod req to the MDT0, then on MDT0,
 334                          * it enqueues master and all of its slaves lock,
 335                          * (mdt_attr_set() -> mdt_lock_slaves()), after gets
 336                          * master and stripe0 lock, it will send the enqueue
 337                          * req (for stripe1) to MDT1, then MDT1 finds the lock
 338                          * has been granted to client2. Then MDT1 sends blocking
 339                          * ast to client2.
 340                          * 2. At the same time, client2 tries to unlink
 341                          * the striped dir (rm -rf striped_dir), and during
 342                          * lookup, it will hold the master inode of the striped
 343                          * directory, whose inode state is NEW, then tries to
 344                          * revalidate all of its slaves, (ll_prep_inode()->
 345                          * ll_iget()->ll_read_inode2()-> ll_update_inode().).
 346                          * And it will be blocked on the server side because
 347                          * of 1.
 348                          * 3. Then the client get the blocking_ast req, cancel
 349                          * the lock, but being blocked if using ->ilookup5()),
 350                          * because master inode state is NEW. */
 351                         master_inode = ilookup5_nowait(inode->i_sb, hash,
 352                                                         ll_test_inode_by_fid,
 353                                                         (void *)&lli->lli_pfid);
 354                         if (master_inode) {
 355                                 ll_invalidate_negative_children(master_inode);
 356                                 iput(master_inode);
 357                         }
 358                 } else {
 359                         ll_invalidate_negative_children(inode);
 360                 }
 361         }
 362
 363         if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
 364             inode->i_sb->s_root != NULL &&
 365             inode != inode->i_sb->s_root->d_inode)
 366                 ll_invalidate_aliases(inode);
 367
 368         if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM))
 369                 forget_all_cached_acls(inode);
 370
 371         iput(inode);
 372         RETURN_EXIT;
 373 }
 374
 375 /* Check if the given lock may be downgraded instead of canceling and
 376  * that convert is really needed. */
 377 int ll_md_need_convert(struct ldlm_lock *lock)
 378 {
 379         struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
 380         struct inode *inode;
 381         __u64 wanted = lock->l_policy_data.l_inodebits.cancel_bits;
 382         __u64 bits = lock->l_policy_data.l_inodebits.bits & ~wanted;
 383         enum ldlm_mode mode = LCK_MINMODE;
 384
 385         if (!lock->l_conn_export ||
 386             !exp_connect_lock_convert(lock->l_conn_export))
 387                 return 0;
 388
 389         if (!wanted || !bits || ldlm_is_cancel(lock))
 390                 return 0;
 391
 392         /* do not convert locks other than DOM for now */
 393         if (!((bits | wanted) & MDS_INODELOCK_DOM))
 394                 return 0;
 395
 396         /* We may have already remaining bits in some other lock so
 397          * lock convert will leave us just extra lock for the same bit.
 398          * Check if client has other lock with the same bits and the same
 399          * or lower mode and don't convert if any.
 400          */
 401         switch (lock->l_req_mode) {
 402         case LCK_PR:
 403                 mode = LCK_PR;
 404                 /* fallthrough */
 405         case LCK_PW:
 406                 mode |= LCK_CR;
 407                 break;
 408         case LCK_CW:
 409                 mode = LCK_CW;
 410                 /* fallthrough */
 411         case LCK_CR:
 412                 mode |= LCK_CR;
 413                 break;
 414         default:
 415                 /* do not convert other modes */
 416                 return 0;
 417         }
 418
 419         /* is lock is too old to be converted? */
 420         lock_res_and_lock(lock);
 421         if (ktime_after(ktime_get(),
 422                         ktime_add(lock->l_last_used,
 423                                   ktime_set(ns->ns_dirty_age_limit, 0)))) {
 424                 unlock_res_and_lock(lock);
 425                 return 0;
 426         }
 427         unlock_res_and_lock(lock);
 428
 429         inode = ll_inode_from_resource_lock(lock);
 430         ll_have_md_lock(inode, &bits, mode);
 431         iput(inode);
 432         return !!(bits);
 433 }
 434
 435 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 436                        void *data, int flag)
 437 {
 438         struct lustre_handle lockh;
 439         __u64 bits = lock->l_policy_data.l_inodebits.bits;
 440         int rc;
 441
 442         ENTRY;
 443
 444         switch (flag) {
 445         case LDLM_CB_BLOCKING:
 446         {
 447                 __u64 cancel_flags = LCF_ASYNC;
 448
 449                 if (ll_md_need_convert(lock)) {
 450                         cancel_flags |= LCF_CONVERT;
 451                         /* For lock convert some cancel actions may require
 452                          * this lock with non-dropped canceled bits, e.g. page
 453                          * flush for DOM lock. So call ll_lock_cancel_bits()
 454                          * here while canceled bits are still set.
 455                          */
 456                         bits = lock->l_policy_data.l_inodebits.cancel_bits;
 457                         if (bits & MDS_INODELOCK_DOM)
 458                                 ll_lock_cancel_bits(lock, MDS_INODELOCK_DOM);
 459                 }
 460                 ldlm_lock2handle(lock, &lockh);
 461                 rc = ldlm_cli_cancel(&lockh, cancel_flags);
 462                 if (rc < 0) {
 463                         CDEBUG(D_INODE, "ldlm_cli_cancel: rc = %d\n", rc);
 464                         RETURN(rc);
 465                 }
 466                 break;
 467         }
 468         case LDLM_CB_CANCELING:
 469                 /* Nothing to do for non-granted locks */
 470                 if (!ldlm_is_granted(lock))
 471                         break;
 472
 473                 if (ldlm_is_converting(lock)) {
 474                         /* this is called on already converted lock, so
 475                          * ibits has remained bits only and cancel_bits
 476                          * are bits that were dropped.
 477                          * Note that DOM lock is handled prior lock convert
 478                          * and is excluded here.
 479                          */
 480                         bits = lock->l_policy_data.l_inodebits.cancel_bits &
 481                                 ~MDS_INODELOCK_DOM;
 482                 } else {
 483                         LASSERT(ldlm_is_canceling(lock));
 484                 }
 485                 ll_lock_cancel_bits(lock, bits);
 486                 break;
 487         default:
 488                 LBUG();
 489         }
 490
 491         RETURN(0);
 492 }
 493
 494 __u32 ll_i2suppgid(struct inode *i)
 495 {
 496         if (in_group_p(i->i_gid))
 497                 return (__u32)from_kgid(&init_user_ns, i->i_gid);
 498         else
 499                 return (__u32) __kgid_val(INVALID_GID);
 500 }
 501
 502 /* Pack the required supplementary groups into the supplied groups array.
 503  * If we don't need to use the groups from the target inode(s) then we
 504  * instead pack one or more groups from the user's supplementary group
 505  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 506 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 507 {
 508         LASSERT(i1 != NULL);
 509         LASSERT(suppgids != NULL);
 510
 511         suppgids[0] = ll_i2suppgid(i1);
 512
 513         if (i2)
 514                 suppgids[1] = ll_i2suppgid(i2);
 515         else
 516                 suppgids[1] = -1;
 517 }
 518
 519 /*
 520  * try to reuse three types of dentry:
 521  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
 522  *    by concurrent .revalidate).
 523  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
 524  *    be cleared by others calling d_lustre_revalidate).
 525  * 3. DISCONNECTED alias.
 526  */
 527 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
 528 {
 529         struct dentry *alias, *discon_alias, *invalid_alias;
 530         DECLARE_LL_D_HLIST_NODE_PTR(p);
 531
 532         if (ll_d_hlist_empty(&inode->i_dentry))
 533                 return NULL;
 534
 535         discon_alias = invalid_alias = NULL;
 536
 537         spin_lock(&inode->i_lock);
 538         ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry) {
 539                 LASSERT(alias != dentry);
 540
 541                 spin_lock(&alias->d_lock);
 542                 if ((alias->d_flags & DCACHE_DISCONNECTED) &&
 543                     S_ISDIR(inode->i_mode))
 544                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
 545                         discon_alias = alias;
 546                 else if (alias->d_parent == dentry->d_parent             &&
 547                          alias->d_name.hash == dentry->d_name.hash       &&
 548                          alias->d_name.len == dentry->d_name.len         &&
 549                          memcmp(alias->d_name.name, dentry->d_name.name,
 550                                 dentry->d_name.len) == 0)
 551                         invalid_alias = alias;
 552                 spin_unlock(&alias->d_lock);
 553
 554                 if (invalid_alias)
 555                         break;
 556         }
 557         alias = invalid_alias ?: discon_alias ?: NULL;
 558         if (alias) {
 559                 spin_lock(&alias->d_lock);
 560                 dget_dlock(alias);
 561                 spin_unlock(&alias->d_lock);
 562         }
 563         spin_unlock(&inode->i_lock);
 564
 565         return alias;
 566 }
 567
 568 /*
 569  * Similar to d_splice_alias(), but lustre treats invalid alias
 570  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
 571  */
 572 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
 573 {
 574         struct dentry *new;
 575         int rc;
 576
 577         if (inode) {
 578                 new = ll_find_alias(inode, de);
 579                 if (new) {
 580                         rc = ll_d_init(new);
 581                         if (rc < 0) {
 582                                 dput(new);
 583                                 return ERR_PTR(rc);
 584                         }
 585                         d_move(new, de);
 586                         iput(inode);
 587                         CDEBUG(D_DENTRY,
 588                                "Reuse dentry %p inode %p refc %d flags %#x\n",
 589                               new, new->d_inode, ll_d_count(new), new->d_flags);
 590                         return new;
 591                 }
 592         }
 593         rc = ll_d_init(de);
 594         if (rc < 0)
 595                 return ERR_PTR(rc);
 596         d_add(de, inode);
 597         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
 598                de, de->d_inode, ll_d_count(de), de->d_flags);
 599         return de;
 600 }
 601
 602 static int ll_lookup_it_finish(struct ptlrpc_request *request,
 603                                struct lookup_intent *it,
 604                                struct inode *parent, struct dentry **de,
 605                                void *secctx, __u32 secctxlen)
 606 {
 607         struct inode             *inode = NULL;
 608         __u64                     bits = 0;
 609         int                       rc;
 610         struct dentry *alias;
 611         ENTRY;
 612
 613         /* NB 1 request reference will be taken away by ll_intent_lock()
 614          * when I return */
 615         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
 616                it->it_disposition);
 617         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 618                 struct req_capsule *pill = &request->rq_pill;
 619                 struct mdt_body *body = req_capsule_server_get(pill,
 620                                                                &RMF_MDT_BODY);
 621
 622                 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
 623                 if (rc)
 624                         RETURN(rc);
 625
 626                 if (it->it_op & IT_OPEN)
 627                         ll_dom_finish_open(inode, request, it);
 628
 629                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
 630
 631                 /* We used to query real size from OSTs here, but actually
 632                  * this is not needed. For stat() calls size would be updated
 633                  * from subsequent do_revalidate()->ll_inode_revalidate_it() in
 634                  * 2.4 and
 635                  * vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 636                  * Everybody else who needs correct file size would call
 637                  * ll_glimpse_size or some equivalent themselves anyway.
 638                  * Also see bug 7198.
 639                  */
 640
 641                 /* If security context was returned by MDT, put it in
 642                  * inode now to save an extra getxattr from security hooks,
 643                  * and avoid deadlock.
 644                  */
 645                 if (body->mbo_valid & OBD_MD_SECCTX) {
 646                         secctx = req_capsule_server_get(pill, &RMF_FILE_SECCTX);
 647                         secctxlen = req_capsule_get_size(pill,
 648                                                            &RMF_FILE_SECCTX,
 649                                                            RCL_SERVER);
 650
 651                         if (secctxlen)
 652                                 CDEBUG(D_SEC, "server returned security context"
 653                                        " for "DFID"\n",
 654                                        PFID(ll_inode2fid(inode)));
 655                 }
 656
 657                 if (secctx != NULL && secctxlen != 0) {
 658                         inode_lock(inode);
 659                         rc = security_inode_notifysecctx(inode, secctx,
 660                                                          secctxlen);
 661                         inode_unlock(inode);
 662                         if (rc)
 663                                 CWARN("cannot set security context for "
 664                                       DFID": rc = %d\n",
 665                                       PFID(ll_inode2fid(inode)), rc);
 666                 }
 667         }
 668
 669         /* Only hash *de if it is unhashed (new dentry).
 670          * Atoimc_open may passin hashed dentries for open.
 671          */
 672         alias = ll_splice_alias(inode, *de);
 673         if (IS_ERR(alias))
 674                 GOTO(out, rc = PTR_ERR(alias));
 675
 676         *de = alias;
 677
 678         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 679                 /* we have lookup look - unhide dentry */
 680                 if (bits & MDS_INODELOCK_LOOKUP)
 681                         d_lustre_revalidate(*de);
 682         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
 683                 /*
 684                  * If file was created on the server, the dentry is revalidated
 685                  * in ll_create_it if the lock allows for it.
 686                  */
 687                 /* Check that parent has UPDATE lock. */
 688                 struct lookup_intent parent_it = {
 689                                         .it_op = IT_GETATTR,
 690                                         .it_lock_handle = 0 };
 691                 struct lu_fid   fid = ll_i2info(parent)->lli_fid;
 692
 693                 /* If it is striped directory, get the real stripe parent */
 694                 if (unlikely(ll_dir_striped(parent))) {
 695                         rc = md_get_fid_from_lsm(ll_i2mdexp(parent),
 696                                                  ll_i2info(parent)->lli_lsm_md,
 697                                                  (*de)->d_name.name,
 698                                                  (*de)->d_name.len, &fid);
 699                         if (rc != 0)
 700                                 GOTO(out, rc);
 701                 }
 702
 703                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it, &fid,
 704                                        NULL)) {
 705                         d_lustre_revalidate(*de);
 706                         ll_intent_release(&parent_it);
 707                 }
 708         }
 709
 710         GOTO(out, rc = 0);
 711
 712 out:
 713         if (rc != 0 && it->it_op & IT_OPEN)
 714                 ll_open_cleanup((*de)->d_sb, request);
 715
 716         return rc;
 717 }
 718
 719 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 720                                    struct lookup_intent *it,
 721                                    void **secctx, __u32 *secctxlen,
 722                                    struct pcc_create_attach *pca)
 723 {
 724         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 725         struct dentry *save = dentry, *retval;
 726         struct ptlrpc_request *req = NULL;
 727         struct md_op_data *op_data = NULL;
 728         struct lov_user_md *lum = NULL;
 729         __u32 opc;
 730         int rc;
 731         char secctx_name[XATTR_NAME_MAX + 1];
 732
 733         ENTRY;
 734
 735         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 736                 RETURN(ERR_PTR(-ENAMETOOLONG));
 737
 738         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
 739                dentry->d_name.len, dentry->d_name.name,
 740                PFID(ll_inode2fid(parent)), parent, LL_IT2STR(it));
 741
 742         if (d_mountpoint(dentry))
 743                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 744
 745         if (it == NULL || it->it_op == IT_GETXATTR)
 746                 it = &lookup_it;
 747
 748         if (it->it_op == IT_GETATTR && dentry_may_statahead(parent, dentry)) {
 749                 rc = ll_statahead(parent, &dentry, 0);
 750                 if (rc == 1)
 751                         RETURN(dentry == save ? NULL : dentry);
 752         }
 753
 754         if (it->it_op & IT_OPEN && it->it_flags & FMODE_WRITE &&
 755             dentry->d_sb->s_flags & SB_RDONLY)
 756                 RETURN(ERR_PTR(-EROFS));
 757
 758         if (it->it_op & IT_CREAT)
 759                 opc = LUSTRE_OPC_CREATE;
 760         else
 761                 opc = LUSTRE_OPC_ANY;
 762
 763         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 764                                      dentry->d_name.len, 0, opc, NULL);
 765         if (IS_ERR(op_data))
 766                 GOTO(out, retval = ERR_CAST(op_data));
 767
 768         /* enforce umask if acl disabled or MDS doesn't support umask */
 769         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 770                 it->it_create_mode &= ~current_umask();
 771
 772         if (it->it_op & IT_CREAT &&
 773             ll_i2sbi(parent)->ll_flags & LL_SBI_FILE_SECCTX) {
 774                 rc = ll_dentry_init_security(dentry, it->it_create_mode,
 775                                              &dentry->d_name,
 776                                              &op_data->op_file_secctx_name,
 777                                              &op_data->op_file_secctx,
 778                                              &op_data->op_file_secctx_size);
 779                 if (rc < 0)
 780                         GOTO(out, retval = ERR_PTR(rc));
 781                 if (secctx != NULL)
 782                         *secctx = op_data->op_file_secctx;
 783                 if (secctxlen != NULL)
 784                         *secctxlen = op_data->op_file_secctx_size;
 785         } else {
 786                 if (secctx != NULL)
 787                         *secctx = NULL;
 788                 if (secctxlen != NULL)
 789                         *secctxlen = 0;
 790         }
 791
 792         /* ask for security context upon intent */
 793         if (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_OPEN)) {
 794                 /* get name of security xattr to request to server */
 795                 rc = ll_listsecurity(parent, secctx_name,
 796                                      sizeof(secctx_name));
 797                 if (rc < 0) {
 798                         CDEBUG(D_SEC, "cannot get security xattr name for "
 799                                DFID": rc = %d\n",
 800                                PFID(ll_inode2fid(parent)), rc);
 801                 } else if (rc > 0) {
 802                         op_data->op_file_secctx_name = secctx_name;
 803                         op_data->op_file_secctx_name_size = rc;
 804                         CDEBUG(D_SEC, "'%.*s' is security xattr for "DFID"\n",
 805                                rc, secctx_name, PFID(ll_inode2fid(parent)));
 806                 }
 807         }
 808
 809         if (pca && pca->pca_dataset) {
 810                 struct pcc_dataset *dataset = pca->pca_dataset;
 811
 812                 OBD_ALLOC_PTR(lum);
 813                 if (lum == NULL)
 814                         GOTO(out, retval = ERR_PTR(-ENOMEM));
 815
 816                 lum->lmm_magic = LOV_USER_MAGIC_V1;
 817                 lum->lmm_pattern = LOV_PATTERN_F_RELEASED | LOV_PATTERN_RAID0;
 818                 op_data->op_data = lum;
 819                 op_data->op_data_size = sizeof(*lum);
 820                 op_data->op_archive_id = dataset->pccd_rwid;
 821
 822                 rc = obd_fid_alloc(NULL, ll_i2mdexp(parent), &op_data->op_fid2,
 823                                    op_data);
 824                 if (rc)
 825                         GOTO(out, retval = ERR_PTR(rc));
 826
 827                 rc = pcc_inode_create(parent->i_sb, dataset, &op_data->op_fid2,
 828                                       &pca->pca_dentry);
 829                 if (rc)
 830                         GOTO(out, retval = ERR_PTR(rc));
 831
 832                 it->it_flags |= MDS_OPEN_PCC;
 833         }
 834
 835         rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
 836                             &ll_md_blocking_ast, 0);
 837         /* If the MDS allows the client to chgrp (CFS_SETGRP_PERM), but the
 838          * client does not know which suppgid should be sent to the MDS, or
 839          * some other(s) changed the target file's GID after this RPC sent
 840          * to the MDS with the suppgid as the original GID, then we should
 841          * try again with right suppgid. */
 842         if (rc == -EACCES && it->it_op & IT_OPEN &&
 843             it_disposition(it, DISP_OPEN_DENY)) {
 844                 struct mdt_body *body;
 845
 846                 LASSERT(req != NULL);
 847
 848                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 849                 if (op_data->op_suppgids[0] == body->mbo_gid ||
 850                     op_data->op_suppgids[1] == body->mbo_gid ||
 851                     !in_group_p(make_kgid(&init_user_ns, body->mbo_gid)))
 852                         GOTO(out, retval = ERR_PTR(-EACCES));
 853
 854                 fid_zero(&op_data->op_fid2);
 855                 op_data->op_suppgids[1] = body->mbo_gid;
 856                 ptlrpc_req_finished(req);
 857                 req = NULL;
 858                 ll_intent_release(it);
 859                 rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
 860                                     &ll_md_blocking_ast, 0);
 861         }
 862
 863         if (rc < 0)
 864                 GOTO(out, retval = ERR_PTR(rc));
 865
 866         /* dir layout may change */
 867         ll_unlock_md_op_lsm(op_data);
 868         rc = ll_lookup_it_finish(req, it, parent, &dentry,
 869                                  secctx != NULL ? *secctx : NULL,
 870                                  secctxlen != NULL ? *secctxlen : 0);
 871         if (rc != 0) {
 872                 ll_intent_release(it);
 873                 GOTO(out, retval = ERR_PTR(rc));
 874         }
 875
 876         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 877             !S_ISREG(dentry->d_inode->i_mode) &&
 878             !S_ISDIR(dentry->d_inode->i_mode)) {
 879                 ll_release_openhandle(dentry, it);
 880         }
 881         ll_lookup_finish_locks(it, dentry);
 882
 883         GOTO(out, retval = (dentry == save) ? NULL : dentry);
 884
 885 out:
 886         if (op_data != NULL && !IS_ERR(op_data)) {
 887                 if (secctx != NULL && secctxlen != NULL) {
 888                         /* caller needs sec ctx info, so reset it in op_data to
 889                          * prevent it from being freed */
 890                         op_data->op_file_secctx = NULL;
 891                         op_data->op_file_secctx_size = 0;
 892                 }
 893                 ll_finish_md_op_data(op_data);
 894         }
 895
 896         if (lum != NULL)
 897                 OBD_FREE_PTR(lum);
 898
 899         ptlrpc_req_finished(req);
 900         return retval;
 901 }
 902
 903 #ifdef HAVE_IOP_ATOMIC_OPEN
 904 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 905                                    unsigned int flags)
 906 {
 907         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
 908         struct dentry *de;
 909
 910         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), flags=%u\n",
 911                dentry->d_name.len, dentry->d_name.name,
 912                PFID(ll_inode2fid(parent)), parent, flags);
 913
 914         /*
 915          * Optimize away (CREATE && !OPEN). Let .create handle the race.
 916          * but only if we have write permissions there, otherwise we need
 917          * to proceed with lookup. LU-4185
 918          */
 919         if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN) &&
 920             (inode_permission(parent, MAY_WRITE | MAY_EXEC) == 0))
 921                 return NULL;
 922
 923         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
 924                 itp = NULL;
 925         else
 926                 itp = &it;
 927         de = ll_lookup_it(parent, dentry, itp, NULL, NULL, NULL);
 928
 929         if (itp != NULL)
 930                 ll_intent_release(itp);
 931
 932         return de;
 933 }
 934
 935 #ifdef FMODE_CREATED /* added in Linux v4.18-rc1-20-g73a09dd */
 936 # define ll_is_opened(o, f)             ((f)->f_mode & FMODE_OPENED)
 937 # define ll_finish_open(f, d, o)        finish_open((f), (d), NULL)
 938 # define ll_last_arg
 939 # define ll_set_created(o, f)                                           \
 940 do {                                                                    \
 941         (f)->f_mode |= FMODE_CREATED;                                   \
 942 } while (0)
 943
 944 #else
 945 # define ll_is_opened(o, f)             (*(o))
 946 # define ll_finish_open(f, d, o)        finish_open((f), (d), NULL, (o))
 947 # define ll_last_arg                    , int *opened
 948 # define ll_set_created(o, f)                                           \
 949 do {                                                                    \
 950         *(o) |= FILE_CREATED;                                           \
 951 } while (0)
 952
 953 #endif
 954
 955 /*
 956  * For cached negative dentry and new dentry, handle lookup/create/open
 957  * together.
 958  */
 959 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
 960                           struct file *file, unsigned open_flags,
 961                           umode_t mode ll_last_arg)
 962 {
 963         struct lookup_intent *it;
 964         struct dentry *de;
 965         long long lookup_flags = LOOKUP_OPEN;
 966         void *secctx = NULL;
 967         __u32 secctxlen = 0;
 968         struct ll_sb_info *sbi;
 969         struct pcc_create_attach pca = { NULL, NULL };
 970         int rc = 0;
 971         ENTRY;
 972
 973         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), file %p,"
 974                            "open_flags %x, mode %x opened %d\n",
 975                dentry->d_name.len, dentry->d_name.name,
 976                PFID(ll_inode2fid(dir)), dir, file, open_flags, mode,
 977                ll_is_opened(opened, file));
 978
 979         /* Only negative dentries enter here */
 980         LASSERT(dentry->d_inode == NULL);
 981
 982         if (!d_unhashed(dentry)) {
 983                 /* A valid negative dentry that just passed revalidation,
 984                  * there's little point to try and open it server-side,
 985                  * even though there's a minuscule chance it might succeed.
 986                  * Either way it's a valid race to just return -ENOENT here.
 987                  */
 988                 if (!(open_flags & O_CREAT))
 989                         return -ENOENT;
 990
 991                 /* Otherwise we just unhash it to be rehashed afresh via
 992                  * lookup if necessary
 993                  */
 994                 d_drop(dentry);
 995         }
 996
 997         OBD_ALLOC(it, sizeof(*it));
 998         if (!it)
 999                 RETURN(-ENOMEM);
1000
1001         it->it_op = IT_OPEN;
1002         if (open_flags & O_CREAT) {
1003                 it->it_op |= IT_CREAT;
1004                 lookup_flags |= LOOKUP_CREATE;
1005                 sbi = ll_i2sbi(dir);
1006                 /* Volatile file is used for HSM restore, so do not use PCC */
1007                 if (!filename_is_volatile(dentry->d_name.name,
1008                                           dentry->d_name.len, NULL)) {
1009                         struct pcc_matcher item;
1010                         struct pcc_dataset *dataset;
1011
1012                         item.pm_uid = from_kuid(&init_user_ns, current_uid());
1013                         item.pm_gid = from_kgid(&init_user_ns, current_gid());
1014                         item.pm_projid = ll_i2info(dir)->lli_projid;
1015                         item.pm_name = &dentry->d_name;
1016                         dataset = pcc_dataset_match_get(&sbi->ll_pcc_super,
1017                                                         &item);
1018                         pca.pca_dataset = dataset;
1019                 }
1020         }
1021         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
1022         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
1023         it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
1024
1025         /* Dentry added to dcache tree in ll_lookup_it */
1026         de = ll_lookup_it(dir, dentry, it, &secctx, &secctxlen, &pca);
1027         if (IS_ERR(de))
1028                 rc = PTR_ERR(de);
1029         else if (de != NULL)
1030                 dentry = de;
1031
1032         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1033
1034         if (!rc) {
1035                 if (it_disposition(it, DISP_OPEN_CREATE)) {
1036                         /* Dentry instantiated in ll_create_it. */
1037                         rc = ll_create_it(dir, dentry, it, secctx, secctxlen);
1038                         security_release_secctx(secctx, secctxlen);
1039                         if (rc) {
1040                                 /* We dget in ll_splice_alias. */
1041                                 if (de != NULL)
1042                                         dput(de);
1043                                 goto out_release;
1044                         }
1045
1046                         rc = pcc_inode_create_fini(dentry->d_inode, &pca);
1047                         if (rc) {
1048                                 if (de != NULL)
1049                                         dput(de);
1050                                 GOTO(out_release, rc);
1051                         }
1052
1053                         ll_set_created(opened, file);
1054                 } else {
1055                         /* Open the file with O_CREAT, but the file already
1056                          * existed on MDT. This may happend in the case that
1057                          * the LOOKUP ibits lock is revoked and the
1058                          * corresponding dentry cache is deleted.
1059                          * i.e. In the current Lustre, the truncate operation
1060                          * will revoke the LOOKUP ibits lock, and the file
1061                          * dentry cache will be invalidated. The following open
1062                          * with O_CREAT flag will call into ->atomic_open, the
1063                          * file was wrongly though as newly created file and
1064                          * try to auto cache the file. So after client knows it
1065                          * is not a DISP_OPEN_CREATE, it should cleanup the
1066                          * already created PCC copy.
1067                          */
1068                         pcc_create_attach_cleanup(dir->i_sb, &pca);
1069                 }
1070
1071                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
1072                         /* Open dentry. */
1073                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
1074                                 /* We cannot call open here as it might
1075                                  * deadlock. This case is unreachable in
1076                                  * practice because of OBD_CONNECT_NODEVOH. */
1077                                 rc = finish_no_open(file, de);
1078                         } else {
1079                                 file->private_data = it;
1080                                 rc = ll_finish_open(file, dentry, opened);
1081                                 /* We dget in ll_splice_alias. finish_open takes
1082                                  * care of dget for fd open.
1083                                  */
1084                                 if (de != NULL)
1085                                         dput(de);
1086                         }
1087                 } else {
1088                         rc = finish_no_open(file, de);
1089                 }
1090         } else {
1091                 pcc_create_attach_cleanup(dir->i_sb, &pca);
1092         }
1093
1094 out_release:
1095         ll_intent_release(it);
1096         OBD_FREE(it, sizeof(*it));
1097
1098         RETURN(rc);
1099 }
1100
1101 #else /* !HAVE_IOP_ATOMIC_OPEN */
1102 static struct lookup_intent *
1103 ll_convert_intent(struct open_intent *oit, int lookup_flags, bool is_readonly)
1104 {
1105         struct lookup_intent *it;
1106
1107         OBD_ALLOC_PTR(it);
1108         if (!it)
1109                 return ERR_PTR(-ENOMEM);
1110
1111         if (lookup_flags & LOOKUP_OPEN) {
1112                 it->it_op = IT_OPEN;
1113                 /* Avoid file creation for ro bind mount point(is_readonly) */
1114                 if ((lookup_flags & LOOKUP_CREATE) && !is_readonly)
1115                         it->it_op |= IT_CREAT;
1116                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
1117                 it->it_flags = ll_namei_to_lookup_intent_flag(oit->flags &
1118                                                 ~(is_readonly ? O_CREAT : 0));
1119                 it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
1120         } else {
1121                 it->it_op = IT_GETATTR;
1122         }
1123
1124         return it;
1125 }
1126
1127 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
1128                                    struct nameidata *nd)
1129 {
1130         struct dentry *de;
1131         ENTRY;
1132
1133         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
1134                 struct lookup_intent *it;
1135
1136                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
1137                         it = ll_d2d(dentry)->lld_it;
1138                         ll_d2d(dentry)->lld_it = NULL;
1139                 } else {
1140                         /*
1141                          * Optimize away (CREATE && !OPEN). Let .create handle
1142                          * the race. But only if we have write permissions
1143                          * there, otherwise we need to proceed with lookup.
1144                          * LU-4185
1145                          */
1146                         if ((nd->flags & LOOKUP_CREATE) &&
1147                             !(nd->flags & LOOKUP_OPEN) &&
1148                             (inode_permission(parent,
1149                                               MAY_WRITE | MAY_EXEC) == 0))
1150                                 RETURN(NULL);
1151
1152                         it = ll_convert_intent(&nd->intent.open, nd->flags,
1153                                 (nd->path.mnt->mnt_flags & MNT_READONLY) ||
1154                                 (nd->path.mnt->mnt_sb->s_flags & SB_RDONLY));
1155                         if (IS_ERR(it))
1156                                 RETURN((struct dentry *)it);
1157                 }
1158
1159                 de = ll_lookup_it(parent, dentry, it, NULL, NULL, NULL);
1160                 if (de)
1161                         dentry = de;
1162                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
1163                         if (dentry->d_inode &&
1164                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
1165                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
1166                                         /* We cannot call open here as it might
1167                                          * deadlock. This case is unreachable in
1168                                          * practice because of
1169                                          * OBD_CONNECT_NODEVOH. */
1170                                 } else {
1171                                         struct file *filp;
1172
1173                                         nd->intent.open.file->private_data = it;
1174                                         filp = lookup_instantiate_filp(nd,
1175                                                                        dentry,
1176                                                                        NULL);
1177                                         if (IS_ERR(filp)) {
1178                                                 if (de)
1179                                                         dput(de);
1180                                                 de = (struct dentry *)filp;
1181                                         }
1182                                 }
1183                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
1184                                 /* XXX This can only reliably work on assumption
1185                                  * that there are NO hashed negative dentries.*/
1186                                 ll_d2d(dentry)->lld_it = it;
1187                                 it = NULL; /* Will be freed in ll_create_nd */
1188                                 /* We absolutely depend on ll_create_nd to be
1189                                  * called to not leak this intent and possible
1190                                  * data attached to it */
1191                         }
1192                 }
1193
1194                 if (it) {
1195                         ll_intent_release(it);
1196                         OBD_FREE(it, sizeof(*it));
1197                 }
1198         } else {
1199                 de = ll_lookup_it(parent, dentry, NULL, NULL, NULL, NULL);
1200         }
1201
1202         RETURN(de);
1203 }
1204 #endif /* HAVE_IOP_ATOMIC_OPEN */
1205
1206 /* We depend on "mode" being set with the proper file type/umask by now */
1207 static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
1208 {
1209         struct inode *inode = NULL;
1210         struct ptlrpc_request *request = NULL;
1211         struct ll_sb_info *sbi = ll_i2sbi(dir);
1212         int rc;
1213         ENTRY;
1214
1215         LASSERT(it && it->it_disposition);
1216
1217         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
1218         request = it->it_request;
1219         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
1220         rc = ll_prep_inode(&inode, request, dir->i_sb, it);
1221         if (rc)
1222                 GOTO(out, inode = ERR_PTR(rc));
1223
1224         /* Pause to allow for a race with concurrent access by fid */
1225         OBD_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_NODE_PAUSE, cfs_fail_val);
1226
1227         /* We asked for a lock on the directory, but were granted a
1228          * lock on the inode.  Since we finally have an inode pointer,
1229          * stuff it in the lock. */
1230         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode "DFID"(%p)\n",
1231                PFID(ll_inode2fid(inode)), inode);
1232         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
1233         EXIT;
1234  out:
1235         ptlrpc_req_finished(request);
1236         return inode;
1237 }
1238
1239 /*
1240  * By the time this is called, we already have created the directory cache
1241  * entry for the new file, but it is so far negative - it has no inode.
1242  *
1243  * We defer creating the OBD object(s) until open, to keep the intent and
1244  * non-intent code paths similar, and also because we do not have the MDS
1245  * inode number before calling ll_create_node() (which is needed for LOV),
1246  * so we would need to do yet another RPC to the MDS to store the LOV EA
1247  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
1248  * lmm_size in datalen (the MDS still has code which will handle that).
1249  *
1250  * If the create succeeds, we fill in the inode information
1251  * with d_instantiate().
1252  */
1253 static int ll_create_it(struct inode *dir, struct dentry *dentry,
1254                         struct lookup_intent *it,
1255                         void *secctx, __u32 secctxlen)
1256 {
1257         struct inode *inode;
1258         __u64 bits = 0;
1259         int rc = 0;
1260         ENTRY;
1261
1262         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
1263                dentry->d_name.len, dentry->d_name.name,
1264                PFID(ll_inode2fid(dir)), dir, LL_IT2STR(it));
1265
1266         rc = it_open_error(DISP_OPEN_CREATE, it);
1267         if (rc)
1268                 RETURN(rc);
1269
1270         inode = ll_create_node(dir, it);
1271         if (IS_ERR(inode))
1272                 RETURN(PTR_ERR(inode));
1273
1274         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX) &&
1275             secctx != NULL) {
1276                 inode_lock(inode);
1277                 /* must be done before d_instantiate, because it calls
1278                  * security_d_instantiate, which means a getxattr if security
1279                  * context is not set yet */
1280                 rc = security_inode_notifysecctx(inode, secctx, secctxlen);
1281                 inode_unlock(inode);
1282                 if (rc)
1283                         RETURN(rc);
1284         }
1285
1286         d_instantiate(dentry, inode);
1287
1288         if (!(ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX)) {
1289                 rc = ll_inode_init_security(dentry, inode, dir);
1290                 if (rc)
1291                         RETURN(rc);
1292         }
1293
1294         ll_set_lock_data(ll_i2sbi(dir)->ll_md_exp, inode, it, &bits);
1295         if (bits & MDS_INODELOCK_LOOKUP)
1296                 d_lustre_revalidate(dentry);
1297
1298         RETURN(0);
1299 }
1300
1301 void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
1302 {
1303         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
1304                                                        &RMF_MDT_BODY);
1305
1306         LASSERT(body);
1307         if (body->mbo_valid & OBD_MD_FLMTIME &&
1308             body->mbo_mtime > inode->i_mtime.tv_sec) {
1309                 CDEBUG(D_INODE,
1310                        "setting fid " DFID " mtime from %lld to %llu\n",
1311                        PFID(ll_inode2fid(inode)),
1312                        (s64)inode->i_mtime.tv_sec, body->mbo_mtime);
1313                 inode->i_mtime.tv_sec = body->mbo_mtime;
1314         }
1315
1316         if (body->mbo_valid & OBD_MD_FLCTIME &&
1317             body->mbo_ctime > inode->i_ctime.tv_sec)
1318                 inode->i_ctime.tv_sec = body->mbo_ctime;
1319 }
1320
1321 static int ll_new_node(struct inode *dir, struct dentry *dchild,
1322                        const char *tgt, umode_t mode, int rdev, __u32 opc)
1323 {
1324         struct qstr *name = &dchild->d_name;
1325         struct ptlrpc_request *request = NULL;
1326         struct md_op_data *op_data;
1327         struct inode *inode = NULL;
1328         struct ll_sb_info *sbi = ll_i2sbi(dir);
1329         int tgt_len = 0;
1330         int err;
1331
1332         ENTRY;
1333         if (unlikely(tgt != NULL))
1334                 tgt_len = strlen(tgt) + 1;
1335
1336 again:
1337         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1338                                      name->len, 0, opc, NULL);
1339         if (IS_ERR(op_data))
1340                 GOTO(err_exit, err = PTR_ERR(op_data));
1341
1342         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1343                 err = ll_dentry_init_security(dchild, mode, &dchild->d_name,
1344                                               &op_data->op_file_secctx_name,
1345                                               &op_data->op_file_secctx,
1346                                               &op_data->op_file_secctx_size);
1347                 if (err < 0)
1348                         GOTO(err_exit, err);
1349         }
1350
1351         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
1352                         from_kuid(&init_user_ns, current_fsuid()),
1353                         from_kgid(&init_user_ns, current_fsgid()),
1354                         cfs_curproc_cap_pack(), rdev, &request);
1355 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 14, 58, 0)
1356         /*
1357          * server < 2.12.58 doesn't pack default LMV in intent_getattr reply,
1358          * fetch default LMV here.
1359          */
1360         if (unlikely(err == -EREMOTE)) {
1361                 struct ll_inode_info    *lli = ll_i2info(dir);
1362                 struct lmv_user_md      *lum;
1363                 int                     lumsize;
1364                 int                     err2;
1365
1366                 ptlrpc_req_finished(request);
1367                 request = NULL;
1368
1369                 err2 = ll_dir_getstripe(dir, (void **)&lum, &lumsize, &request,
1370                                         OBD_MD_DEFAULT_MEA);
1371                 ll_finish_md_op_data(op_data);
1372                 op_data = NULL;
1373                 if (err2 == 0) {
1374                         struct lustre_md md = { NULL };
1375
1376                         md.body = req_capsule_server_get(&request->rq_pill,
1377                                                          &RMF_MDT_BODY);
1378                         if (!md.body)
1379                                 GOTO(err_exit, err = -EPROTO);
1380
1381                         OBD_ALLOC_PTR(md.default_lmv);
1382                         if (!md.default_lmv)
1383                                 GOTO(err_exit, err = -ENOMEM);
1384
1385                         md.default_lmv->lsm_md_magic = lum->lum_magic;
1386                         md.default_lmv->lsm_md_stripe_count =
1387                                 lum->lum_stripe_count;
1388                         md.default_lmv->lsm_md_master_mdt_index =
1389                                 lum->lum_stripe_offset;
1390                         md.default_lmv->lsm_md_hash_type = lum->lum_hash_type;
1391
1392                         err = ll_update_inode(dir, &md);
1393                         md_free_lustre_md(sbi->ll_md_exp, &md);
1394                         if (err)
1395                                 GOTO(err_exit, err);
1396                 } else if (err2 == -ENODATA && lli->lli_default_lsm_md) {
1397                         /*
1398                          * If there are no default stripe EA on the MDT, but the
1399                          * client has default stripe, then it probably means
1400                          * default stripe EA has just been deleted.
1401                          */
1402                         down_write(&lli->lli_lsm_sem);
1403                         if (lli->lli_default_lsm_md)
1404                                 OBD_FREE_PTR(lli->lli_default_lsm_md);
1405                         lli->lli_default_lsm_md = NULL;
1406                         up_write(&lli->lli_lsm_sem);
1407                 } else {
1408                         GOTO(err_exit, err);
1409                 }
1410
1411                 ptlrpc_req_finished(request);
1412                 request = NULL;
1413                 goto again;
1414         }
1415 #endif
1416
1417         if (err < 0)
1418                 GOTO(err_exit, err);
1419
1420         ll_update_times(request, dir);
1421
1422         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_NEWNODE_PAUSE, cfs_fail_val);
1423
1424         err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
1425         if (err)
1426                 GOTO(err_exit, err);
1427
1428         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1429                 inode_lock(inode);
1430                 /* must be done before d_instantiate, because it calls
1431                  * security_d_instantiate, which means a getxattr if security
1432                  * context is not set yet */
1433                 err = security_inode_notifysecctx(inode,
1434                                                   op_data->op_file_secctx,
1435                                                   op_data->op_file_secctx_size);
1436                 inode_unlock(inode);
1437                 if (err)
1438                         GOTO(err_exit, err);
1439         }
1440
1441         d_instantiate(dchild, inode);
1442
1443         if (!(sbi->ll_flags & LL_SBI_FILE_SECCTX)) {
1444                 err = ll_inode_init_security(dchild, inode, dir);
1445                 if (err)
1446                         GOTO(err_exit, err);
1447         }
1448
1449         EXIT;
1450 err_exit:
1451         if (request != NULL)
1452                 ptlrpc_req_finished(request);
1453
1454         if (!IS_ERR_OR_NULL(op_data))
1455                 ll_finish_md_op_data(op_data);
1456
1457         return err;
1458 }
1459
1460 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1461                     dev_t rdev)
1462 {
1463         struct qstr *name = &dchild->d_name;
1464         ktime_t kstart = ktime_get();
1465         int err;
1466         ENTRY;
1467
1468         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p) mode %o dev %x\n",
1469                name->len, name->name, PFID(ll_inode2fid(dir)), dir,
1470                mode, rdev);
1471
1472         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1473                 mode &= ~current_umask();
1474
1475         switch (mode & S_IFMT) {
1476         case 0:
1477                 mode |= S_IFREG;
1478                 /* fallthrough */
1479         case S_IFREG:
1480         case S_IFCHR:
1481         case S_IFBLK:
1482         case S_IFIFO:
1483         case S_IFSOCK:
1484                 err = ll_new_node(dir, dchild, NULL, mode, old_encode_dev(rdev),
1485                                   LUSTRE_OPC_MKNOD);
1486                 break;
1487         case S_IFDIR:
1488                 err = -EPERM;
1489                 break;
1490         default:
1491                 err = -EINVAL;
1492         }
1493
1494         if (!err)
1495                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD,
1496                                    ktime_us_delta(ktime_get(), kstart));
1497
1498         RETURN(err);
1499 }
1500
1501 #ifdef HAVE_IOP_ATOMIC_OPEN
1502 /*
1503  * Plain create. Intent create is handled in atomic_open.
1504  */
1505 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1506                         umode_t mode, bool want_excl)
1507 {
1508         ktime_t kstart = ktime_get();
1509         int rc;
1510
1511         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1512
1513         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), "
1514                            "flags=%u, excl=%d\n", dentry->d_name.len,
1515                dentry->d_name.name, PFID(ll_inode2fid(dir)),
1516                dir, mode, want_excl);
1517
1518         /* Using mknod(2) to create a regular file is designed to not recognize
1519          * volatile file name, so we use ll_mknod() here. */
1520         rc = ll_mknod(dir, dentry, mode, 0);
1521
1522         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
1523                dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
1524
1525         if (!rc)
1526                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE,
1527                                    ktime_us_delta(ktime_get(), kstart));
1528
1529         return rc;
1530 }
1531 #else /* !HAVE_IOP_ATOMIC_OPEN */
1532 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1533                         ll_umode_t mode, struct nameidata *nd)
1534 {
1535         struct ll_dentry_data *lld = ll_d2d(dentry);
1536         struct lookup_intent *it = NULL;
1537         ktime_t kstart = ktime_get();
1538         int rc;
1539
1540         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1541
1542         if (lld != NULL)
1543                 it = lld->lld_it;
1544
1545         if (!it) {
1546                 /* LU-8559: use LUSTRE_OPC_CREATE for non atomic open case
1547                  * so that volatile file name is recoginized.
1548                  * Mknod(2), however, is designed to not recognize volatile
1549                  * file name to avoid inode leak under orphan directory until
1550                  * MDT reboot */
1551                 return ll_new_node(dir, dentry, NULL, mode, 0,
1552                                    LUSTRE_OPC_CREATE);
1553         }
1554
1555         lld->lld_it = NULL;
1556
1557         /* Was there an error? Propagate it! */
1558         if (it->it_status) {
1559                 rc = it->it_status;
1560                 goto out;
1561         }
1562
1563         rc = ll_create_it(dir, dentry, it, NULL, 0);
1564         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
1565                 struct file *filp;
1566
1567                 nd->intent.open.file->private_data = it;
1568                 filp = lookup_instantiate_filp(nd, dentry, NULL);
1569                 if (IS_ERR(filp))
1570                         rc = PTR_ERR(filp);
1571         }
1572
1573 out:
1574         ll_intent_release(it);
1575         OBD_FREE(it, sizeof(*it));
1576
1577         if (!rc)
1578                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE,
1579                                    ktime_us_delta(ktime_get(), kstart));
1580
1581         return rc;
1582 }
1583 #endif /* HAVE_IOP_ATOMIC_OPEN */
1584
1585 static int ll_symlink(struct inode *dir, struct dentry *dchild,
1586                       const char *oldpath)
1587 {
1588         struct qstr *name = &dchild->d_name;
1589         ktime_t kstart = ktime_get();
1590         int err;
1591         ENTRY;
1592
1593         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), target=%.*s\n",
1594                name->len, name->name, PFID(ll_inode2fid(dir)),
1595                dir, 3000, oldpath);
1596
1597         err = ll_new_node(dir, dchild, oldpath, S_IFLNK | S_IRWXUGO, 0,
1598                           LUSTRE_OPC_SYMLINK);
1599
1600         if (!err)
1601                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK,
1602                                    ktime_us_delta(ktime_get(), kstart));
1603
1604         RETURN(err);
1605 }
1606
1607 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1608                    struct dentry *new_dentry)
1609 {
1610         struct inode *src = old_dentry->d_inode;
1611         struct qstr *name = &new_dentry->d_name;
1612         struct ll_sb_info *sbi = ll_i2sbi(dir);
1613         struct ptlrpc_request *request = NULL;
1614         struct md_op_data *op_data;
1615         ktime_t kstart = ktime_get();
1616         int err;
1617
1618         ENTRY;
1619         CDEBUG(D_VFSTRACE, "VFS Op: inode="DFID"(%p), dir="DFID"(%p), "
1620                "target=%.*s\n", PFID(ll_inode2fid(src)), src,
1621                PFID(ll_inode2fid(dir)), dir, name->len, name->name);
1622
1623         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1624                                      0, LUSTRE_OPC_ANY, NULL);
1625         if (IS_ERR(op_data))
1626                 RETURN(PTR_ERR(op_data));
1627
1628         err = md_link(sbi->ll_md_exp, op_data, &request);
1629         ll_finish_md_op_data(op_data);
1630         if (err)
1631                 GOTO(out, err);
1632
1633         ll_update_times(request, dir);
1634         ll_stats_ops_tally(sbi, LPROC_LL_LINK,
1635                            ktime_us_delta(ktime_get(), kstart));
1636         EXIT;
1637 out:
1638         ptlrpc_req_finished(request);
1639         RETURN(err);
1640 }
1641
1642 static int ll_mkdir(struct inode *dir, struct dentry *dchild, ll_umode_t mode)
1643 {
1644         struct qstr *name = &dchild->d_name;
1645         ktime_t kstart = ktime_get();
1646         int err;
1647         ENTRY;
1648
1649         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1650                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1651
1652         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1653                 mode &= ~current_umask();
1654
1655         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1656
1657         err = ll_new_node(dir, dchild, NULL, mode, 0, LUSTRE_OPC_MKDIR);
1658         if (err == 0)
1659                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR,
1660                                    ktime_us_delta(ktime_get(), kstart));
1661
1662         RETURN(err);
1663 }
1664
1665 static int ll_rmdir(struct inode *dir, struct dentry *dchild)
1666 {
1667         struct qstr *name = &dchild->d_name;
1668         struct ptlrpc_request *request = NULL;
1669         struct md_op_data *op_data;
1670         ktime_t kstart = ktime_get();
1671         int rc;
1672
1673         ENTRY;
1674
1675         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1676                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1677
1678         if (unlikely(d_mountpoint(dchild)))
1679                 RETURN(-EBUSY);
1680
1681         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1682                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1683         if (IS_ERR(op_data))
1684                 RETURN(PTR_ERR(op_data));
1685
1686         if (dchild->d_inode != NULL)
1687                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1688
1689         op_data->op_fid2 = op_data->op_fid3;
1690         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1691         ll_finish_md_op_data(op_data);
1692         if (!rc)
1693                 ll_update_times(request, dir);
1694
1695         ptlrpc_req_finished(request);
1696         if (!rc)
1697                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR,
1698                                    ktime_us_delta(ktime_get(), kstart));
1699         RETURN(rc);
1700 }
1701
1702 /**
1703  * Remove dir entry
1704  **/
1705 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1706 {
1707         struct ptlrpc_request *request = NULL;
1708         struct md_op_data *op_data;
1709         ktime_t kstart = ktime_get();
1710         int rc;
1711         ENTRY;
1712
1713         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1714                namelen, name, PFID(ll_inode2fid(dir)), dir);
1715
1716         op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1717                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1718         if (IS_ERR(op_data))
1719                 RETURN(PTR_ERR(op_data));
1720         op_data->op_cli_flags |= CLI_RM_ENTRY;
1721         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1722         ll_finish_md_op_data(op_data);
1723         if (!rc)
1724                 ll_update_times(request, dir);
1725
1726         ptlrpc_req_finished(request);
1727         if (!rc)
1728                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR,
1729                                    ktime_us_delta(ktime_get(), kstart));
1730         RETURN(rc);
1731 }
1732
1733 static int ll_unlink(struct inode *dir, struct dentry *dchild)
1734 {
1735         struct qstr *name = &dchild->d_name;
1736         struct ptlrpc_request *request = NULL;
1737         struct md_op_data *op_data;
1738         struct mdt_body *body;
1739         ktime_t kstart = ktime_get();
1740         int rc;
1741
1742         ENTRY;
1743
1744         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1745                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1746
1747         /*
1748          * XXX: unlink bind mountpoint maybe call to here,
1749          * just check it as vfs_unlink does.
1750          */
1751         if (unlikely(d_mountpoint(dchild)))
1752                 RETURN(-EBUSY);
1753
1754         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len, 0,
1755                                      LUSTRE_OPC_ANY, NULL);
1756         if (IS_ERR(op_data))
1757                 RETURN(PTR_ERR(op_data));
1758
1759         op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1760
1761         op_data->op_fid2 = op_data->op_fid3;
1762         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1763         ll_finish_md_op_data(op_data);
1764         if (rc)
1765                 GOTO(out, rc);
1766
1767         /*
1768          * The server puts attributes in on the last unlink, use them to update
1769          * the link count so the inode can be freed immediately.
1770          */
1771         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1772         if (body->mbo_valid & OBD_MD_FLNLINK)
1773                 set_nlink(dchild->d_inode, body->mbo_nlink);
1774
1775         ll_update_times(request, dir);
1776
1777 out:
1778         ptlrpc_req_finished(request);
1779         if (!rc)
1780                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK,
1781                                    ktime_us_delta(ktime_get(), kstart));
1782         RETURN(rc);
1783 }
1784
1785 static int ll_rename(struct inode *src, struct dentry *src_dchild,
1786                      struct inode *tgt, struct dentry *tgt_dchild
1787 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
1788                      , unsigned int flags
1789 #endif
1790                      )
1791 {
1792         struct qstr *src_name = &src_dchild->d_name;
1793         struct qstr *tgt_name = &tgt_dchild->d_name;
1794         struct ptlrpc_request *request = NULL;
1795         struct ll_sb_info *sbi = ll_i2sbi(src);
1796         struct md_op_data *op_data;
1797         ktime_t kstart = ktime_get();
1798         int err;
1799         ENTRY;
1800
1801 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
1802         if (flags)
1803                 return -EINVAL;
1804 #endif
1805
1806         CDEBUG(D_VFSTRACE, "VFS Op:oldname=%.*s, src_dir="DFID
1807                "(%p), newname=%.*s, tgt_dir="DFID"(%p)\n",
1808                src_name->len, src_name->name,
1809                PFID(ll_inode2fid(src)), src, tgt_name->len,
1810                tgt_name->name, PFID(ll_inode2fid(tgt)), tgt);
1811
1812         if (unlikely(d_mountpoint(src_dchild) || d_mountpoint(tgt_dchild)))
1813                 RETURN(-EBUSY);
1814
1815         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1816                                      LUSTRE_OPC_ANY, NULL);
1817         if (IS_ERR(op_data))
1818                 RETURN(PTR_ERR(op_data));
1819
1820         if (src_dchild->d_inode != NULL)
1821                 op_data->op_fid3 = *ll_inode2fid(src_dchild->d_inode);
1822
1823         if (tgt_dchild->d_inode != NULL)
1824                 op_data->op_fid4 = *ll_inode2fid(tgt_dchild->d_inode);
1825
1826         err = md_rename(sbi->ll_md_exp, op_data,
1827                         src_name->name, src_name->len,
1828                         tgt_name->name, tgt_name->len, &request);
1829         ll_finish_md_op_data(op_data);
1830         if (!err) {
1831                 ll_update_times(request, src);
1832                 ll_update_times(request, tgt);
1833         }
1834
1835         ptlrpc_req_finished(request);
1836
1837         if (!err) {
1838                 d_move(src_dchild, tgt_dchild);
1839                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME,
1840                                    ktime_us_delta(ktime_get(), kstart));
1841         }
1842
1843         RETURN(err);
1844 }
1845
1846 const struct inode_operations ll_dir_inode_operations = {
1847         .mknod          = ll_mknod,
1848 #ifdef HAVE_IOP_ATOMIC_OPEN
1849         .atomic_open    = ll_atomic_open,
1850 #endif
1851         .lookup         = ll_lookup_nd,
1852         .create         = ll_create_nd,
1853         /* We need all these non-raw things for NFSD, to not patch it. */
1854         .unlink         = ll_unlink,
1855         .mkdir          = ll_mkdir,
1856         .rmdir          = ll_rmdir,
1857         .symlink        = ll_symlink,
1858         .link           = ll_link,
1859         .rename         = ll_rename,
1860         .setattr        = ll_setattr,
1861         .getattr        = ll_getattr,
1862         .permission     = ll_inode_permission,
1863 #ifdef HAVE_IOP_XATTR
1864         .setxattr       = ll_setxattr,
1865         .getxattr       = ll_getxattr,
1866         .removexattr    = ll_removexattr,
1867 #endif
1868         .listxattr      = ll_listxattr,
1869 #ifdef HAVE_IOP_GET_ACL
1870         .get_acl        = ll_get_acl,
1871 #endif
1872 #ifdef HAVE_IOP_SET_ACL
1873         .set_acl        = ll_set_acl,
1874 #endif
1875 };
1876
1877 const struct inode_operations ll_special_inode_operations = {
1878         .setattr        = ll_setattr,
1879         .getattr        = ll_getattr,
1880         .permission     = ll_inode_permission,
1881 #ifdef HAVE_IOP_XATTR
1882         .setxattr       = ll_setxattr,
1883         .getxattr       = ll_getxattr,
1884         .removexattr    = ll_removexattr,
1885 #endif
1886         .listxattr      = ll_listxattr,
1887 #ifdef HAVE_IOP_GET_ACL
1888         .get_acl        = ll_get_acl,
1889 #endif
1890 #ifdef HAVE_IOP_SET_ACL
1891         .set_acl        = ll_set_acl,
1892 #endif
1893 };