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 #include <linux/uidgid.h>
  42
  43 #define DEBUG_SUBSYSTEM S_LLITE
  44
  45 #include <obd_support.h>
  46 #include <lustre_fid.h>
  47 #include <lustre_dlm.h>
  48 #include "llite_internal.h"
  49
  50 static int ll_create_it(struct inode *dir, struct dentry *dentry,
  51                         struct lookup_intent *it,
  52                         void *secctx, __u32 secctxlen, bool encrypt,
  53                         void *encctx, __u32 encctxlen);
  54
  55 /* called from iget5_locked->find_inode() under inode_lock spinlock */
  56 static int ll_test_inode(struct inode *inode, void *opaque)
  57 {
  58         struct ll_inode_info    *lli = ll_i2info(inode);
  59         struct lustre_md        *md = opaque;
  60
  61         if (unlikely(!(md->body->mbo_valid & OBD_MD_FLID))) {
  62                 CERROR("MDS body missing FID\n");
  63                 return 0;
  64         }
  65
  66         if (!lu_fid_eq(&lli->lli_fid, &md->body->mbo_fid1))
  67                 return 0;
  68
  69         return 1;
  70 }
  71
  72 static int ll_set_inode(struct inode *inode, void *opaque)
  73 {
  74         struct ll_inode_info *lli = ll_i2info(inode);
  75         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
  76
  77         if (unlikely(!(body->mbo_valid & OBD_MD_FLID))) {
  78                 CERROR("MDS body missing FID\n");
  79                 return -EINVAL;
  80         }
  81
  82         lli->lli_fid = body->mbo_fid1;
  83         if (unlikely(!(body->mbo_valid & OBD_MD_FLTYPE))) {
  84                 CERROR("Can not initialize inode "DFID" without object type: "
  85                        "valid = %#llx\n",
  86                        PFID(&lli->lli_fid), body->mbo_valid);
  87                 return -EINVAL;
  88         }
  89
  90         inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mbo_mode & S_IFMT);
  91         if (unlikely(inode->i_mode == 0)) {
  92                 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
  93                 return -EINVAL;
  94         }
  95
  96         ll_lli_init(lli);
  97
  98         return 0;
  99 }
 100
 101
 102 /**
 103  * Get an inode by inode number(@hash), which is already instantiated by
 104  * the intent lookup).
 105  */
 106 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 107                       struct lustre_md *md)
 108 {
 109         struct inode    *inode;
 110         int             rc = 0;
 111
 112         ENTRY;
 113
 114         LASSERT(hash != 0);
 115         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
 116         if (inode == NULL)
 117                 RETURN(ERR_PTR(-ENOMEM));
 118
 119         if (inode->i_state & I_NEW) {
 120                 rc = ll_read_inode2(inode, md);
 121                 if (rc == 0 && S_ISREG(inode->i_mode) &&
 122                     ll_i2info(inode)->lli_clob == NULL)
 123                         rc = cl_file_inode_init(inode, md);
 124
 125                 if (rc != 0) {
 126                         /* Let's clear directory lsm here, otherwise
 127                          * make_bad_inode() will reset the inode mode
 128                          * to regular, then ll_clear_inode will not
 129                          * be able to clear lsm_md */
 130                         if (S_ISDIR(inode->i_mode))
 131                                 ll_dir_clear_lsm_md(inode);
 132                         make_bad_inode(inode);
 133                         unlock_new_inode(inode);
 134                         iput(inode);
 135                         inode = ERR_PTR(rc);
 136                 } else {
 137                         inode_has_no_xattr(inode);
 138                         unlock_new_inode(inode);
 139                 }
 140         } else if (is_bad_inode(inode)) {
 141                 iput(inode);
 142                 inode = ERR_PTR(-ESTALE);
 143         } else if (!(inode->i_state & (I_FREEING | I_CLEAR))) {
 144                 rc = ll_update_inode(inode, md);
 145                 CDEBUG(D_VFSTRACE, "got inode: "DFID"(%p): rc = %d\n",
 146                        PFID(&md->body->mbo_fid1), inode, rc);
 147                 if (rc != 0) {
 148                         if (S_ISDIR(inode->i_mode))
 149                                 ll_dir_clear_lsm_md(inode);
 150                         iput(inode);
 151                         inode = ERR_PTR(rc);
 152                 }
 153         }
 154
 155         RETURN(inode);
 156 }
 157
 158 static void ll_invalidate_negative_children(struct inode *dir)
 159 {
 160         struct dentry *dentry, *tmp_subdir;
 161
 162         spin_lock(&dir->i_lock);
 163         hlist_for_each_entry(dentry, &dir->i_dentry, d_alias) {
 164                 spin_lock(&dentry->d_lock);
 165                 if (!list_empty(&dentry->d_subdirs)) {
 166                         struct dentry *child;
 167
 168                         list_for_each_entry_safe(child, tmp_subdir,
 169                                                  &dentry->d_subdirs,
 170                                                  d_child) {
 171                                 if (child->d_inode == NULL)
 172                                         d_lustre_invalidate(child, 1);
 173                         }
 174                 }
 175                 spin_unlock(&dentry->d_lock);
 176         }
 177         spin_unlock(&dir->i_lock);
 178 }
 179
 180 int ll_test_inode_by_fid(struct inode *inode, void *opaque)
 181 {
 182         return lu_fid_eq(&ll_i2info(inode)->lli_fid, opaque);
 183 }
 184
 185 static int ll_dom_lock_cancel(struct inode *inode, struct ldlm_lock *lock)
 186 {
 187         struct lu_env *env;
 188         struct ll_inode_info *lli = ll_i2info(inode);
 189         __u16 refcheck;
 190         int rc;
 191         ENTRY;
 192
 193         if (!lli->lli_clob) {
 194                 /* due to DoM read on open, there may exist pages for Lustre
 195                  * regular file even though cl_object is not set up yet. */
 196                 truncate_inode_pages(inode->i_mapping, 0);
 197                 RETURN(0);
 198         }
 199
 200         env = cl_env_get(&refcheck);
 201         if (IS_ERR(env))
 202                 RETURN(PTR_ERR(env));
 203
 204         /* reach MDC layer to flush data under  the DoM ldlm lock */
 205         rc = cl_object_flush(env, lli->lli_clob, lock);
 206         if (rc == -ENODATA) {
 207                 CDEBUG(D_INODE, "inode "DFID" layout has no DoM stripe\n",
 208                        PFID(ll_inode2fid(inode)));
 209                 /* most likely result of layout change, do nothing */
 210                 rc = 0;
 211         }
 212
 213         cl_env_put(env, &refcheck);
 214         RETURN(rc);
 215 }
 216
 217 static void ll_lock_cancel_bits(struct ldlm_lock *lock, __u64 to_cancel)
 218 {
 219         struct inode *inode = ll_inode_from_resource_lock(lock);
 220         struct ll_inode_info *lli;
 221         __u64 bits = to_cancel;
 222         int rc;
 223
 224         ENTRY;
 225
 226         if (!inode) {
 227                 /* That means the inode is evicted most likely and may cause
 228                  * the skipping of lock cleanups below, so print the message
 229                  * about that in log.
 230                  */
 231                 if (lock->l_resource->lr_lvb_inode)
 232                         LDLM_DEBUG(lock,
 233                                    "can't take inode for the lock (%sevicted)\n",
 234                                    lock->l_resource->lr_lvb_inode->i_state &
 235                                    I_FREEING ? "" : "not ");
 236                 RETURN_EXIT;
 237         }
 238
 239         if (!fid_res_name_eq(ll_inode2fid(inode),
 240                              &lock->l_resource->lr_name)) {
 241                 LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
 242                            PFID(ll_inode2fid(inode)), inode);
 243                 LBUG();
 244         }
 245
 246         if (bits & MDS_INODELOCK_XATTR) {
 247                 ll_xattr_cache_destroy(inode);
 248                 bits &= ~MDS_INODELOCK_XATTR;
 249         }
 250
 251         /* For OPEN locks we differentiate between lock modes
 252          * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
 253         if (bits & MDS_INODELOCK_OPEN)
 254                 ll_have_md_lock(inode, &bits, lock->l_req_mode);
 255
 256         if (bits & MDS_INODELOCK_OPEN) {
 257                 fmode_t fmode;
 258
 259                 switch (lock->l_req_mode) {
 260                 case LCK_CW:
 261                         fmode = FMODE_WRITE;
 262                         break;
 263                 case LCK_PR:
 264                         fmode = FMODE_EXEC;
 265                         break;
 266                 case LCK_CR:
 267                         fmode = FMODE_READ;
 268                         break;
 269                 default:
 270                         LDLM_ERROR(lock, "bad lock mode for OPEN lock");
 271                         LBUG();
 272                 }
 273
 274                 ll_md_real_close(inode, fmode);
 275
 276                 bits &= ~MDS_INODELOCK_OPEN;
 277         }
 278
 279         if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
 280                     MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM |
 281                     MDS_INODELOCK_DOM))
 282                 ll_have_md_lock(inode, &bits, LCK_MINMODE);
 283
 284         if (bits & MDS_INODELOCK_DOM) {
 285                 rc =  ll_dom_lock_cancel(inode, lock);
 286                 if (rc < 0)
 287                         CDEBUG(D_INODE, "cannot flush DoM data "
 288                                DFID": rc = %d\n",
 289                                PFID(ll_inode2fid(inode)), rc);
 290         }
 291
 292         if (bits & MDS_INODELOCK_LAYOUT) {
 293                 struct cl_object_conf conf = {
 294                         .coc_opc = OBJECT_CONF_INVALIDATE,
 295                         .coc_inode = inode,
 296                 };
 297
 298                 rc = ll_layout_conf(inode, &conf);
 299                 if (rc < 0)
 300                         CDEBUG(D_INODE, "cannot invalidate layout of "
 301                                DFID": rc = %d\n",
 302                                PFID(ll_inode2fid(inode)), rc);
 303         }
 304
 305         lli = ll_i2info(inode);
 306
 307         if (bits & MDS_INODELOCK_UPDATE)
 308                 ll_file_set_flag(lli, LLIF_UPDATE_ATIME);
 309
 310         if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
 311                 CDEBUG(D_INODE, "invalidating inode "DFID" lli = %p, "
 312                        "pfid  = "DFID"\n", PFID(ll_inode2fid(inode)),
 313                        lli, PFID(&lli->lli_pfid));
 314                 truncate_inode_pages(inode->i_mapping, 0);
 315
 316                 if (unlikely(!fid_is_zero(&lli->lli_pfid))) {
 317                         struct inode *master_inode = NULL;
 318                         unsigned long hash;
 319
 320                         /* This is slave inode, since all of the child dentry
 321                          * is connected on the master inode, so we have to
 322                          * invalidate the negative children on master inode */
 323                         CDEBUG(D_INODE, "Invalidate s"DFID" m"DFID"\n",
 324                                PFID(ll_inode2fid(inode)), PFID(&lli->lli_pfid));
 325
 326                         hash = cl_fid_build_ino(&lli->lli_pfid,
 327                                         ll_need_32bit_api(ll_i2sbi(inode)));
 328
 329                         /* Do not lookup the inode with ilookup5, otherwise
 330                          * it will cause dead lock,
 331                          * 1. Client1 send chmod req to the MDT0, then on MDT0,
 332                          * it enqueues master and all of its slaves lock,
 333                          * (mdt_attr_set() -> mdt_lock_slaves()), after gets
 334                          * master and stripe0 lock, it will send the enqueue
 335                          * req (for stripe1) to MDT1, then MDT1 finds the lock
 336                          * has been granted to client2. Then MDT1 sends blocking
 337                          * ast to client2.
 338                          * 2. At the same time, client2 tries to unlink
 339                          * the striped dir (rm -rf striped_dir), and during
 340                          * lookup, it will hold the master inode of the striped
 341                          * directory, whose inode state is NEW, then tries to
 342                          * revalidate all of its slaves, (ll_prep_inode()->
 343                          * ll_iget()->ll_read_inode2()-> ll_update_inode().).
 344                          * And it will be blocked on the server side because
 345                          * of 1.
 346                          * 3. Then the client get the blocking_ast req, cancel
 347                          * the lock, but being blocked if using ->ilookup5()),
 348                          * because master inode state is NEW. */
 349                         master_inode = ilookup5_nowait(inode->i_sb, hash,
 350                                                         ll_test_inode_by_fid,
 351                                                         (void *)&lli->lli_pfid);
 352                         if (master_inode) {
 353                                 ll_invalidate_negative_children(master_inode);
 354                                 iput(master_inode);
 355                         }
 356                 } else {
 357                         ll_invalidate_negative_children(inode);
 358                 }
 359         }
 360
 361         if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
 362             inode->i_sb->s_root != NULL &&
 363             inode != inode->i_sb->s_root->d_inode)
 364                 ll_invalidate_aliases(inode);
 365
 366         if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM))
 367                 forget_all_cached_acls(inode);
 368
 369         iput(inode);
 370         RETURN_EXIT;
 371 }
 372
 373 /* Check if the given lock may be downgraded instead of canceling and
 374  * that convert is really needed. */
 375 int ll_md_need_convert(struct ldlm_lock *lock)
 376 {
 377         struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
 378         struct inode *inode;
 379         __u64 wanted = lock->l_policy_data.l_inodebits.cancel_bits;
 380         __u64 bits = lock->l_policy_data.l_inodebits.bits & ~wanted;
 381         enum ldlm_mode mode = LCK_MINMODE;
 382
 383         if (!lock->l_conn_export ||
 384             !exp_connect_lock_convert(lock->l_conn_export))
 385                 return 0;
 386
 387         if (!wanted || !bits || ldlm_is_cancel(lock))
 388                 return 0;
 389
 390         /* do not convert locks other than DOM for now */
 391         if (!((bits | wanted) & MDS_INODELOCK_DOM))
 392                 return 0;
 393
 394         /* We may have already remaining bits in some other lock so
 395          * lock convert will leave us just extra lock for the same bit.
 396          * Check if client has other lock with the same bits and the same
 397          * or lower mode and don't convert if any.
 398          */
 399         switch (lock->l_req_mode) {
 400         case LCK_PR:
 401                 mode = LCK_PR;
 402                 /* fallthrough */
 403         case LCK_PW:
 404                 mode |= LCK_CR;
 405                 break;
 406         case LCK_CW:
 407                 mode = LCK_CW;
 408                 /* fallthrough */
 409         case LCK_CR:
 410                 mode |= LCK_CR;
 411                 break;
 412         default:
 413                 /* do not convert other modes */
 414                 return 0;
 415         }
 416
 417         /* is lock is too old to be converted? */
 418         lock_res_and_lock(lock);
 419         if (ktime_after(ktime_get(),
 420                         ktime_add(lock->l_last_used, ns->ns_dirty_age_limit))) {
 421                 unlock_res_and_lock(lock);
 422                 return 0;
 423         }
 424         unlock_res_and_lock(lock);
 425
 426         inode = ll_inode_from_resource_lock(lock);
 427         ll_have_md_lock(inode, &bits, mode);
 428         iput(inode);
 429         return !!(bits);
 430 }
 431
 432 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *ld,
 433                        void *data, int flag)
 434 {
 435         struct lustre_handle lockh;
 436         int rc;
 437
 438         ENTRY;
 439
 440         switch (flag) {
 441         case LDLM_CB_BLOCKING:
 442         {
 443                 __u64 cancel_flags = LCF_ASYNC;
 444
 445                 /* if lock convert is not needed then still have to
 446                  * pass lock via ldlm_cli_convert() to keep all states
 447                  * correct, set cancel_bits to full lock bits to cause
 448                  * full cancel to happen.
 449                  */
 450                 if (!ll_md_need_convert(lock)) {
 451                         lock_res_and_lock(lock);
 452                         lock->l_policy_data.l_inodebits.cancel_bits =
 453                                         lock->l_policy_data.l_inodebits.bits;
 454                         unlock_res_and_lock(lock);
 455                 }
 456                 rc = ldlm_cli_convert(lock, cancel_flags);
 457                 if (!rc)
 458                         RETURN(0);
 459                 /* continue with cancel otherwise */
 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         {
 470                 __u64 to_cancel = lock->l_policy_data.l_inodebits.bits;
 471
 472                 /* Nothing to do for non-granted locks */
 473                 if (!ldlm_is_granted(lock))
 474                         break;
 475
 476                 /* If 'ld' is supplied then bits to be cancelled are passed
 477                  * implicitly by lock converting and cancel_bits from 'ld'
 478                  * should be used. Otherwise full cancel is being performed
 479                  * and lock inodebits are used.
 480                  *
 481                  * Note: we cannot rely on cancel_bits in lock itself at this
 482                  * moment because they can be changed by concurrent thread,
 483                  * so ldlm_cli_inodebits_convert() pass cancel bits implicitly
 484                  * in 'ld' parameter.
 485                  */
 486                 if (ld) {
 487                         /* partial bits cancel allowed only during convert */
 488                         LASSERT(ldlm_is_converting(lock));
 489                         /* mask cancel bits by lock bits so only no any unused
 490                          * bits are passed to ll_lock_cancel_bits()
 491                          */
 492                         to_cancel &= ld->l_policy_data.l_inodebits.cancel_bits;
 493                 }
 494                 ll_lock_cancel_bits(lock, to_cancel);
 495                 break;
 496         }
 497         default:
 498                 LBUG();
 499         }
 500
 501         RETURN(0);
 502 }
 503
 504 __u32 ll_i2suppgid(struct inode *i)
 505 {
 506         if (in_group_p(i->i_gid))
 507                 return (__u32)from_kgid(&init_user_ns, i->i_gid);
 508         else
 509                 return (__u32) __kgid_val(INVALID_GID);
 510 }
 511
 512 /* Pack the required supplementary groups into the supplied groups array.
 513  * If we don't need to use the groups from the target inode(s) then we
 514  * instead pack one or more groups from the user's supplementary group
 515  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 516 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 517 {
 518         LASSERT(i1 != NULL);
 519         LASSERT(suppgids != NULL);
 520
 521         suppgids[0] = ll_i2suppgid(i1);
 522
 523         if (i2)
 524                 suppgids[1] = ll_i2suppgid(i2);
 525         else
 526                 suppgids[1] = -1;
 527 }
 528
 529 /*
 530  * try to reuse three types of dentry:
 531  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
 532  *    by concurrent .revalidate).
 533  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
 534  *    be cleared by others calling d_lustre_revalidate).
 535  * 3. DISCONNECTED alias.
 536  */
 537 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
 538 {
 539         struct dentry *alias, *discon_alias, *invalid_alias;
 540
 541         if (hlist_empty(&inode->i_dentry))
 542                 return NULL;
 543
 544         discon_alias = invalid_alias = NULL;
 545
 546         spin_lock(&inode->i_lock);
 547         hlist_for_each_entry(alias, &inode->i_dentry, d_alias) {
 548                 LASSERT(alias != dentry);
 549
 550                 spin_lock(&alias->d_lock);
 551                 if ((alias->d_flags & DCACHE_DISCONNECTED) &&
 552                     S_ISDIR(inode->i_mode))
 553                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
 554                         discon_alias = alias;
 555                 else if (alias->d_parent == dentry->d_parent             &&
 556                          alias->d_name.hash == dentry->d_name.hash       &&
 557                          alias->d_name.len == dentry->d_name.len         &&
 558                          memcmp(alias->d_name.name, dentry->d_name.name,
 559                                 dentry->d_name.len) == 0)
 560                         invalid_alias = alias;
 561                 spin_unlock(&alias->d_lock);
 562
 563                 if (invalid_alias)
 564                         break;
 565         }
 566         alias = invalid_alias ?: discon_alias ?: NULL;
 567         if (alias) {
 568                 spin_lock(&alias->d_lock);
 569                 dget_dlock(alias);
 570                 spin_unlock(&alias->d_lock);
 571         }
 572         spin_unlock(&inode->i_lock);
 573
 574         return alias;
 575 }
 576
 577 /*
 578  * Similar to d_splice_alias(), but lustre treats invalid alias
 579  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
 580  */
 581 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
 582 {
 583         struct dentry *new;
 584         int rc;
 585
 586         if (inode) {
 587                 new = ll_find_alias(inode, de);
 588                 if (new) {
 589                         rc = ll_d_init(new);
 590                         if (rc < 0) {
 591                                 dput(new);
 592                                 return ERR_PTR(rc);
 593                         }
 594                         d_move(new, de);
 595                         iput(inode);
 596                         CDEBUG(D_DENTRY,
 597                                "Reuse dentry %p inode %p refc %d flags %#x\n",
 598                               new, new->d_inode, ll_d_count(new), new->d_flags);
 599                         return new;
 600                 }
 601         }
 602         rc = ll_d_init(de);
 603         if (rc < 0)
 604                 return ERR_PTR(rc);
 605         d_add(de, inode);
 606         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
 607                de, de->d_inode, ll_d_count(de), de->d_flags);
 608         return de;
 609 }
 610
 611 static int ll_lookup_it_finish(struct ptlrpc_request *request,
 612                                struct lookup_intent *it,
 613                                struct inode *parent, struct dentry **de,
 614                                void *secctx, __u32 secctxlen,
 615                                void *encctx, __u32 encctxlen,
 616                                ktime_t kstart, bool encrypt)
 617 {
 618         struct inode             *inode = NULL;
 619         __u64                     bits = 0;
 620         int                       rc;
 621         struct dentry *alias;
 622         ENTRY;
 623
 624         /* NB 1 request reference will be taken away by ll_intent_lock()
 625          * when I return */
 626         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
 627                it->it_disposition);
 628         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 629                 struct req_capsule *pill = &request->rq_pill;
 630                 struct mdt_body *body = req_capsule_server_get(pill,
 631                                                                &RMF_MDT_BODY);
 632
 633                 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
 634                 if (rc)
 635                         RETURN(rc);
 636
 637                 if (it->it_op & IT_OPEN)
 638                         ll_dom_finish_open(inode, request, it);
 639
 640                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
 641
 642                 /* We used to query real size from OSTs here, but actually
 643                  * this is not needed. For stat() calls size would be updated
 644                  * from subsequent do_revalidate()->ll_inode_revalidate_it() in
 645                  * 2.4 and
 646                  * vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 647                  * Everybody else who needs correct file size would call
 648                  * ll_glimpse_size or some equivalent themselves anyway.
 649                  * Also see bug 7198.
 650                  */
 651
 652                 /* If security context was returned by MDT, put it in
 653                  * inode now to save an extra getxattr from security hooks,
 654                  * and avoid deadlock.
 655                  */
 656                 if (body->mbo_valid & OBD_MD_SECCTX) {
 657                         secctx = req_capsule_server_get(pill, &RMF_FILE_SECCTX);
 658                         secctxlen = req_capsule_get_size(pill,
 659                                                            &RMF_FILE_SECCTX,
 660                                                            RCL_SERVER);
 661
 662                         if (secctxlen)
 663                                 CDEBUG(D_SEC, "server returned security context"
 664                                        " for "DFID"\n",
 665                                        PFID(ll_inode2fid(inode)));
 666                 }
 667
 668                 if (secctx != NULL && secctxlen != 0) {
 669                         /* no need to protect selinux_inode_setsecurity() by
 670                          * inode_lock. Taking it would lead to a client deadlock
 671                          * LU-13617
 672                          */
 673                         rc = security_inode_notifysecctx(inode, secctx,
 674                                                          secctxlen);
 675                         if (rc)
 676                                 CWARN("%s: cannot set security context for "DFID": rc = %d\n",
 677                                       ll_i2sbi(inode)->ll_fsname,
 678                                       PFID(ll_inode2fid(inode)),
 679                                       rc);
 680                 }
 681
 682                 /* If encryption context was returned by MDT, put it in
 683                  * inode now to save an extra getxattr and avoid deadlock.
 684                  */
 685                 if (body->mbo_valid & OBD_MD_ENCCTX) {
 686                         encctx = req_capsule_server_get(pill, &RMF_FILE_ENCCTX);
 687                         encctxlen = req_capsule_get_size(pill,
 688                                                          &RMF_FILE_ENCCTX,
 689                                                          RCL_SERVER);
 690
 691                         if (encctxlen) {
 692                                 CDEBUG(D_SEC,
 693                                        "server returned encryption ctx for "DFID"\n",
 694                                        PFID(ll_inode2fid(inode)));
 695                                 rc = ll_xattr_cache_insert(inode,
 696                                                LL_XATTR_NAME_ENCRYPTION_CONTEXT,
 697                                                encctx, encctxlen);
 698                                 if (rc)
 699                                         CWARN("%s: cannot set enc ctx for "DFID": rc = %d\n",
 700                                               ll_i2sbi(inode)->ll_fsname,
 701                                               PFID(ll_inode2fid(inode)), rc);
 702                         }
 703                 }
 704         }
 705
 706         /* Only hash *de if it is unhashed (new dentry).
 707          * Atoimc_open may passin hashed dentries for open.
 708          */
 709         alias = ll_splice_alias(inode, *de);
 710         if (IS_ERR(alias))
 711                 GOTO(out, rc = PTR_ERR(alias));
 712
 713         *de = alias;
 714
 715         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 716                 /* we have lookup look - unhide dentry */
 717                 if (bits & MDS_INODELOCK_LOOKUP)
 718                         d_lustre_revalidate(*de);
 719
 720                 if (encrypt) {
 721                         rc = llcrypt_get_encryption_info(inode);
 722                         if (rc)
 723                                 GOTO(out, rc);
 724                         if (!llcrypt_has_encryption_key(inode))
 725                                 GOTO(out, rc = -ENOKEY);
 726                 }
 727         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
 728                 /*
 729                  * If file was created on the server, the dentry is revalidated
 730                  * in ll_create_it if the lock allows for it.
 731                  */
 732                 /* Check that parent has UPDATE lock. */
 733                 struct lookup_intent parent_it = {
 734                                         .it_op = IT_GETATTR,
 735                                         .it_lock_handle = 0 };
 736                 struct lu_fid   fid = ll_i2info(parent)->lli_fid;
 737
 738                 /* If it is striped directory, get the real stripe parent */
 739                 if (unlikely(ll_dir_striped(parent))) {
 740                         rc = md_get_fid_from_lsm(ll_i2mdexp(parent),
 741                                                  ll_i2info(parent)->lli_lsm_md,
 742                                                  (*de)->d_name.name,
 743                                                  (*de)->d_name.len, &fid);
 744                         if (rc != 0)
 745                                 GOTO(out, rc);
 746                 }
 747
 748                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it, &fid,
 749                                        NULL)) {
 750                         d_lustre_revalidate(*de);
 751                         ll_intent_release(&parent_it);
 752                 }
 753         }
 754
 755         if (it_disposition(it, DISP_OPEN_CREATE)) {
 756                 ll_stats_ops_tally(ll_i2sbi(parent), LPROC_LL_MKNOD,
 757                                    ktime_us_delta(ktime_get(), kstart));
 758         }
 759
 760         GOTO(out, rc = 0);
 761
 762 out:
 763         if (rc != 0 && it->it_op & IT_OPEN) {
 764                 ll_intent_drop_lock(it);
 765                 ll_open_cleanup((*de)->d_sb, request);
 766         }
 767
 768         return rc;
 769 }
 770
 771 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 772                                    struct lookup_intent *it,
 773                                    void **secctx, __u32 *secctxlen,
 774                                    struct pcc_create_attach *pca,
 775                                    bool encrypt,
 776                                    void **encctx, __u32 *encctxlen)
 777 {
 778         ktime_t kstart = ktime_get();
 779         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 780         struct dentry *save = dentry, *retval;
 781         struct ptlrpc_request *req = NULL;
 782         struct md_op_data *op_data = NULL;
 783         struct lov_user_md *lum = NULL;
 784         __u32 opc;
 785         int rc;
 786         char secctx_name[XATTR_NAME_MAX + 1];
 787
 788         ENTRY;
 789
 790         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 791                 RETURN(ERR_PTR(-ENAMETOOLONG));
 792
 793         CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p), intent=%s\n",
 794                dentry, PFID(ll_inode2fid(parent)), parent, LL_IT2STR(it));
 795
 796         if (d_mountpoint(dentry))
 797                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 798
 799         if (it == NULL || it->it_op == IT_GETXATTR)
 800                 it = &lookup_it;
 801
 802         if (it->it_op == IT_GETATTR && dentry_may_statahead(parent, dentry)) {
 803                 rc = ll_revalidate_statahead(parent, &dentry, 0);
 804                 if (rc == 1)
 805                         RETURN(dentry == save ? NULL : dentry);
 806         }
 807
 808         if (it->it_op & IT_OPEN && it->it_flags & FMODE_WRITE &&
 809             dentry->d_sb->s_flags & SB_RDONLY)
 810                 RETURN(ERR_PTR(-EROFS));
 811
 812         if (it->it_op & IT_CREAT)
 813                 opc = LUSTRE_OPC_CREATE;
 814         else
 815                 opc = LUSTRE_OPC_ANY;
 816
 817         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 818                                      dentry->d_name.len, 0, opc, NULL);
 819         if (IS_ERR(op_data))
 820                 GOTO(out, retval = ERR_CAST(op_data));
 821
 822         /* enforce umask if acl disabled or MDS doesn't support umask */
 823         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 824                 it->it_create_mode &= ~current_umask();
 825
 826         if (it->it_op & IT_CREAT &&
 827             ll_i2sbi(parent)->ll_flags & LL_SBI_FILE_SECCTX) {
 828                 rc = ll_dentry_init_security(dentry, it->it_create_mode,
 829                                              &dentry->d_name,
 830                                              &op_data->op_file_secctx_name,
 831                                              &op_data->op_file_secctx,
 832                                              &op_data->op_file_secctx_size);
 833                 if (rc < 0)
 834                         GOTO(out, retval = ERR_PTR(rc));
 835                 if (secctx != NULL)
 836                         *secctx = op_data->op_file_secctx;
 837                 if (secctxlen != NULL)
 838                         *secctxlen = op_data->op_file_secctx_size;
 839         } else {
 840                 if (secctx != NULL)
 841                         *secctx = NULL;
 842                 if (secctxlen != NULL)
 843                         *secctxlen = 0;
 844         }
 845         if (it->it_op & IT_CREAT && encrypt) {
 846                 rc = llcrypt_inherit_context(parent, NULL, op_data, false);
 847                 if (rc)
 848                         GOTO(out, retval = ERR_PTR(rc));
 849                 if (encctx != NULL)
 850                         *encctx = op_data->op_file_encctx;
 851                 if (encctxlen != NULL)
 852                         *encctxlen = op_data->op_file_encctx_size;
 853         } else {
 854                 if (encctx != NULL)
 855                         *encctx = NULL;
 856                 if (encctxlen != NULL)
 857                         *encctxlen = 0;
 858         }
 859
 860         /* ask for security context upon intent */
 861         if (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_OPEN)) {
 862                 /* get name of security xattr to request to server */
 863                 rc = ll_listsecurity(parent, secctx_name,
 864                                      sizeof(secctx_name));
 865                 if (rc < 0) {
 866                         CDEBUG(D_SEC, "cannot get security xattr name for "
 867                                DFID": rc = %d\n",
 868                                PFID(ll_inode2fid(parent)), rc);
 869                 } else if (rc > 0) {
 870                         op_data->op_file_secctx_name = secctx_name;
 871                         op_data->op_file_secctx_name_size = rc;
 872                         CDEBUG(D_SEC, "'%.*s' is security xattr for "DFID"\n",
 873                                rc, secctx_name, PFID(ll_inode2fid(parent)));
 874                 }
 875         }
 876
 877         if (pca && pca->pca_dataset) {
 878                 struct pcc_dataset *dataset = pca->pca_dataset;
 879
 880                 OBD_ALLOC_PTR(lum);
 881                 if (lum == NULL)
 882                         GOTO(out, retval = ERR_PTR(-ENOMEM));
 883
 884                 lum->lmm_magic = LOV_USER_MAGIC_V1;
 885                 lum->lmm_pattern = LOV_PATTERN_F_RELEASED | LOV_PATTERN_RAID0;
 886                 op_data->op_data = lum;
 887                 op_data->op_data_size = sizeof(*lum);
 888                 op_data->op_archive_id = dataset->pccd_rwid;
 889
 890                 rc = obd_fid_alloc(NULL, ll_i2mdexp(parent), &op_data->op_fid2,
 891                                    op_data);
 892                 if (rc)
 893                         GOTO(out, retval = ERR_PTR(rc));
 894
 895                 rc = pcc_inode_create(parent->i_sb, dataset, &op_data->op_fid2,
 896                                       &pca->pca_dentry);
 897                 if (rc)
 898                         GOTO(out, retval = ERR_PTR(rc));
 899
 900                 it->it_flags |= MDS_OPEN_PCC;
 901         }
 902
 903         rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
 904                             &ll_md_blocking_ast, 0);
 905         /* If the MDS allows the client to chgrp (CFS_SETGRP_PERM), but the
 906          * client does not know which suppgid should be sent to the MDS, or
 907          * some other(s) changed the target file's GID after this RPC sent
 908          * to the MDS with the suppgid as the original GID, then we should
 909          * try again with right suppgid. */
 910         if (rc == -EACCES && it->it_op & IT_OPEN &&
 911             it_disposition(it, DISP_OPEN_DENY)) {
 912                 struct mdt_body *body;
 913
 914                 LASSERT(req != NULL);
 915
 916                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 917                 if (op_data->op_suppgids[0] == body->mbo_gid ||
 918                     op_data->op_suppgids[1] == body->mbo_gid ||
 919                     !in_group_p(make_kgid(&init_user_ns, body->mbo_gid)))
 920                         GOTO(out, retval = ERR_PTR(-EACCES));
 921
 922                 fid_zero(&op_data->op_fid2);
 923                 op_data->op_suppgids[1] = body->mbo_gid;
 924                 ptlrpc_req_finished(req);
 925                 req = NULL;
 926                 ll_intent_release(it);
 927                 rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
 928                                     &ll_md_blocking_ast, 0);
 929         }
 930
 931         if (rc < 0)
 932                 GOTO(out, retval = ERR_PTR(rc));
 933
 934         /* dir layout may change */
 935         ll_unlock_md_op_lsm(op_data);
 936         rc = ll_lookup_it_finish(req, it, parent, &dentry,
 937                                  secctx != NULL ? *secctx : NULL,
 938                                  secctxlen != NULL ? *secctxlen : 0,
 939                                  encctx != NULL ? *encctx : NULL,
 940                                  encctxlen != NULL ? *encctxlen : 0,
 941                                  kstart, encrypt);
 942         if (rc != 0) {
 943                 ll_intent_release(it);
 944                 GOTO(out, retval = ERR_PTR(rc));
 945         }
 946
 947         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 948             !S_ISREG(dentry->d_inode->i_mode) &&
 949             !S_ISDIR(dentry->d_inode->i_mode)) {
 950                 ll_release_openhandle(dentry, it);
 951         }
 952         ll_lookup_finish_locks(it, dentry);
 953
 954         GOTO(out, retval = (dentry == save) ? NULL : dentry);
 955
 956 out:
 957         if (op_data != NULL && !IS_ERR(op_data)) {
 958                 if (secctx != NULL && secctxlen != NULL) {
 959                         /* caller needs sec ctx info, so reset it in op_data to
 960                          * prevent it from being freed */
 961                         op_data->op_file_secctx = NULL;
 962                         op_data->op_file_secctx_size = 0;
 963                 }
 964                 if (encctx != NULL && encctxlen != NULL &&
 965                     it->it_op & IT_CREAT && encrypt) {
 966                         /* caller needs enc ctx info, so reset it in op_data to
 967                          * prevent it from being freed
 968                          */
 969                         op_data->op_file_encctx = NULL;
 970                         op_data->op_file_encctx_size = 0;
 971                 }
 972                 ll_finish_md_op_data(op_data);
 973         }
 974
 975         if (lum != NULL)
 976                 OBD_FREE_PTR(lum);
 977
 978         ptlrpc_req_finished(req);
 979         return retval;
 980 }
 981
 982 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 983                                    unsigned int flags)
 984 {
 985         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
 986         struct dentry *de;
 987
 988         CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p), flags=%u\n",
 989                dentry, PFID(ll_inode2fid(parent)), parent, flags);
 990
 991         /*
 992          * Optimize away (CREATE && !OPEN). Let .create handle the race.
 993          * but only if we have write permissions there, otherwise we need
 994          * to proceed with lookup. LU-4185
 995          */
 996         if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN) &&
 997             (inode_permission(parent, MAY_WRITE | MAY_EXEC) == 0))
 998                 return NULL;
 999
1000         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
1001                 itp = NULL;
1002         else
1003                 itp = &it;
1004         de = ll_lookup_it(parent, dentry, itp, NULL, NULL, NULL, false,
1005                           NULL, NULL);
1006
1007         if (itp != NULL)
1008                 ll_intent_release(itp);
1009
1010         return de;
1011 }
1012
1013 #ifdef FMODE_CREATED /* added in Linux v4.18-rc1-20-g73a09dd */
1014 # define ll_is_opened(o, f)             ((f)->f_mode & FMODE_OPENED)
1015 # define ll_finish_open(f, d, o)        finish_open((f), (d), NULL)
1016 # define ll_last_arg
1017 # define ll_set_created(o, f)                                           \
1018 do {                                                                    \
1019         (f)->f_mode |= FMODE_CREATED;                                   \
1020 } while (0)
1021
1022 #else
1023 # define ll_is_opened(o, f)             (*(o))
1024 # define ll_finish_open(f, d, o)        finish_open((f), (d), NULL, (o))
1025 # define ll_last_arg                    , int *opened
1026 # define ll_set_created(o, f)                                           \
1027 do {                                                                    \
1028         *(o) |= FILE_CREATED;                                           \
1029 } while (0)
1030
1031 #endif
1032
1033 /*
1034  * For cached negative dentry and new dentry, handle lookup/create/open
1035  * together.
1036  */
1037 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
1038                           struct file *file, unsigned open_flags,
1039                           umode_t mode ll_last_arg)
1040 {
1041         struct lookup_intent *it;
1042         struct dentry *de;
1043         long long lookup_flags = LOOKUP_OPEN;
1044         void *secctx = NULL;
1045         __u32 secctxlen = 0;
1046         void *encctx = NULL;
1047         __u32 encctxlen = 0;
1048         struct ll_sb_info *sbi = NULL;
1049         struct pcc_create_attach pca = { NULL, NULL };
1050         bool encrypt = false;
1051         int rc = 0;
1052         ENTRY;
1053
1054         CDEBUG(D_VFSTRACE,
1055                "VFS Op:name=%pd, dir="DFID"(%p), file %p, open_flags %x, mode %x opened %d\n",
1056                dentry, PFID(ll_inode2fid(dir)), dir, file, open_flags, mode,
1057                ll_is_opened(opened, file));
1058
1059         /* Only negative dentries enter here */
1060         LASSERT(dentry->d_inode == NULL);
1061
1062         if (!d_unhashed(dentry)) {
1063                 /* A valid negative dentry that just passed revalidation,
1064                  * there's little point to try and open it server-side,
1065                  * even though there's a minuscule chance it might succeed.
1066                  * Either way it's a valid race to just return -ENOENT here.
1067                  */
1068                 if (!(open_flags & O_CREAT))
1069                         return -ENOENT;
1070
1071                 /* Otherwise we just unhash it to be rehashed afresh via
1072                  * lookup if necessary
1073                  */
1074                 d_drop(dentry);
1075         }
1076
1077         OBD_ALLOC(it, sizeof(*it));
1078         if (!it)
1079                 RETURN(-ENOMEM);
1080
1081         it->it_op = IT_OPEN;
1082         if (open_flags & O_CREAT) {
1083                 it->it_op |= IT_CREAT;
1084                 lookup_flags |= LOOKUP_CREATE;
1085                 sbi = ll_i2sbi(dir);
1086                 /* Volatile file is used for HSM restore, so do not use PCC */
1087                 if (!filename_is_volatile(dentry->d_name.name,
1088                                           dentry->d_name.len, NULL)) {
1089                         struct pcc_matcher item;
1090                         struct pcc_dataset *dataset;
1091
1092                         item.pm_uid = from_kuid(&init_user_ns, current_uid());
1093                         item.pm_gid = from_kgid(&init_user_ns, current_gid());
1094                         item.pm_projid = ll_i2info(dir)->lli_projid;
1095                         item.pm_name = &dentry->d_name;
1096                         dataset = pcc_dataset_match_get(&sbi->ll_pcc_super,
1097                                                         &item);
1098                         pca.pca_dataset = dataset;
1099                 }
1100         }
1101         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
1102         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
1103         it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
1104
1105         if (ll_sbi_has_encrypt(ll_i2sbi(dir)) && IS_ENCRYPTED(dir)) {
1106                 /* we know that we are going to create a regular file because
1107                  * we set S_IFREG bit on it->it_create_mode above
1108                  */
1109                 rc = llcrypt_get_encryption_info(dir);
1110                 if (rc)
1111                         GOTO(out_release, rc);
1112                 if (!llcrypt_has_encryption_key(dir))
1113                         GOTO(out_release, rc = -ENOKEY);
1114                 encrypt = true;
1115                 rc = 0;
1116         }
1117
1118         /* Dentry added to dcache tree in ll_lookup_it */
1119         de = ll_lookup_it(dir, dentry, it, &secctx, &secctxlen, &pca, encrypt,
1120                           &encctx, &encctxlen);
1121         if (IS_ERR(de))
1122                 rc = PTR_ERR(de);
1123         else if (de != NULL)
1124                 dentry = de;
1125
1126         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1127
1128         if (!rc) {
1129                 if (it_disposition(it, DISP_OPEN_CREATE)) {
1130                         /* Dentry instantiated in ll_create_it. */
1131                         rc = ll_create_it(dir, dentry, it, secctx, secctxlen,
1132                                           encrypt, encctx, encctxlen);
1133                         security_release_secctx(secctx, secctxlen);
1134                         llcrypt_free_ctx(encctx, encctxlen);
1135                         if (rc) {
1136                                 /* We dget in ll_splice_alias. */
1137                                 if (de != NULL)
1138                                         dput(de);
1139                                 goto out_release;
1140                         }
1141
1142                         rc = pcc_inode_create_fini(dentry->d_inode, &pca);
1143                         if (rc) {
1144                                 if (de != NULL)
1145                                         dput(de);
1146                                 GOTO(out_release, rc);
1147                         }
1148
1149                         ll_set_created(opened, file);
1150                 } else {
1151                         /* Open the file with O_CREAT, but the file already
1152                          * existed on MDT. This may happend in the case that
1153                          * the LOOKUP ibits lock is revoked and the
1154                          * corresponding dentry cache is deleted.
1155                          * i.e. In the current Lustre, the truncate operation
1156                          * will revoke the LOOKUP ibits lock, and the file
1157                          * dentry cache will be invalidated. The following open
1158                          * with O_CREAT flag will call into ->atomic_open, the
1159                          * file was wrongly though as newly created file and
1160                          * try to auto cache the file. So after client knows it
1161                          * is not a DISP_OPEN_CREATE, it should cleanup the
1162                          * already created PCC copy.
1163                          */
1164                         pcc_create_attach_cleanup(dir->i_sb, &pca);
1165
1166                         if (open_flags & O_CREAT && encrypt &&
1167                             dentry->d_inode) {
1168                                 rc = ll_set_encflags(dentry->d_inode, encctx,
1169                                                      encctxlen, true);
1170                                 llcrypt_free_ctx(encctx, encctxlen);
1171                                 if (rc)
1172                                         GOTO(out_release, rc);
1173                         }
1174                 }
1175
1176                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
1177                         /* Open dentry. */
1178                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
1179                                 /* We cannot call open here as it might
1180                                  * deadlock. This case is unreachable in
1181                                  * practice because of OBD_CONNECT_NODEVOH. */
1182                                 rc = finish_no_open(file, de);
1183                         } else {
1184                                 file->private_data = it;
1185                                 rc = ll_finish_open(file, dentry, opened);
1186                                 /* We dget in ll_splice_alias. finish_open takes
1187                                  * care of dget for fd open.
1188                                  */
1189                                 if (de != NULL)
1190                                         dput(de);
1191                         }
1192                 } else {
1193                         rc = finish_no_open(file, de);
1194                 }
1195         } else {
1196                 pcc_create_attach_cleanup(dir->i_sb, &pca);
1197         }
1198
1199 out_release:
1200         ll_intent_release(it);
1201         OBD_FREE(it, sizeof(*it));
1202
1203         RETURN(rc);
1204 }
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, bool encrypt,
1256                         void *encctx, __u32 encctxlen)
1257 {
1258         struct inode *inode;
1259         __u64 bits = 0;
1260         int rc = 0;
1261         ENTRY;
1262
1263         CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p), intent=%s\n",
1264                dentry, 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                 /* must be done before d_instantiate, because it calls
1277                  * security_d_instantiate, which means a getxattr if security
1278                  * context is not set yet */
1279                 /* no need to protect selinux_inode_setsecurity() by
1280                  * inode_lock. Taking it would lead to a client deadlock
1281                  * LU-13617
1282                  */
1283                 rc = security_inode_notifysecctx(inode, secctx, secctxlen);
1284                 if (rc)
1285                         RETURN(rc);
1286         }
1287
1288         d_instantiate(dentry, inode);
1289
1290         if (encrypt) {
1291                 rc = ll_set_encflags(inode, encctx, encctxlen, true);
1292                 if (rc)
1293                         RETURN(rc);
1294         }
1295
1296         if (!(ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX)) {
1297                 rc = ll_inode_init_security(dentry, inode, dir);
1298                 if (rc)
1299                         RETURN(rc);
1300         }
1301
1302         ll_set_lock_data(ll_i2sbi(dir)->ll_md_exp, inode, it, &bits);
1303         if (bits & MDS_INODELOCK_LOOKUP)
1304                 d_lustre_revalidate(dentry);
1305
1306         RETURN(0);
1307 }
1308
1309 void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
1310 {
1311         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
1312                                                        &RMF_MDT_BODY);
1313
1314         LASSERT(body);
1315         if (body->mbo_valid & OBD_MD_FLMTIME &&
1316             body->mbo_mtime > inode->i_mtime.tv_sec) {
1317                 CDEBUG(D_INODE,
1318                        "setting fid " DFID " mtime from %lld to %llu\n",
1319                        PFID(ll_inode2fid(inode)),
1320                        (s64)inode->i_mtime.tv_sec, body->mbo_mtime);
1321                 inode->i_mtime.tv_sec = body->mbo_mtime;
1322         }
1323
1324         if (body->mbo_valid & OBD_MD_FLCTIME &&
1325             body->mbo_ctime > inode->i_ctime.tv_sec)
1326                 inode->i_ctime.tv_sec = body->mbo_ctime;
1327 }
1328
1329 static int ll_new_node(struct inode *dir, struct dentry *dchild,
1330                        const char *tgt, umode_t mode, int rdev, __u32 opc)
1331 {
1332         struct qstr *name = &dchild->d_name;
1333         struct ptlrpc_request *request = NULL;
1334         struct md_op_data *op_data = NULL;
1335         struct inode *inode = NULL;
1336         struct ll_sb_info *sbi = ll_i2sbi(dir);
1337         int tgt_len = 0;
1338         bool encrypt = false;
1339         int err;
1340
1341         ENTRY;
1342         if (unlikely(tgt != NULL))
1343                 tgt_len = strlen(tgt) + 1;
1344
1345 again:
1346         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1347                                      name->len, 0, opc, NULL);
1348         if (IS_ERR(op_data))
1349                 GOTO(err_exit, err = PTR_ERR(op_data));
1350
1351         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1352                 err = ll_dentry_init_security(dchild, mode, &dchild->d_name,
1353                                               &op_data->op_file_secctx_name,
1354                                               &op_data->op_file_secctx,
1355                                               &op_data->op_file_secctx_size);
1356                 if (err < 0)
1357                         GOTO(err_exit, err);
1358         }
1359
1360         if (ll_sbi_has_encrypt(sbi) &&
1361             ((IS_ENCRYPTED(dir) &&
1362             (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))) ||
1363             (unlikely(llcrypt_dummy_context_enabled(dir)) && S_ISDIR(mode)))) {
1364                 err = llcrypt_get_encryption_info(dir);
1365                 if (err)
1366                         GOTO(err_exit, err);
1367                 if (!llcrypt_has_encryption_key(dir))
1368                         GOTO(err_exit, err = -ENOKEY);
1369                 encrypt = true;
1370         }
1371
1372         if (encrypt) {
1373                 err = llcrypt_inherit_context(dir, NULL, op_data, false);
1374                 if (err)
1375                         GOTO(err_exit, err);
1376         }
1377
1378         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
1379                         from_kuid(&init_user_ns, current_fsuid()),
1380                         from_kgid(&init_user_ns, current_fsgid()),
1381                         cfs_curproc_cap_pack(), rdev, &request);
1382 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 14, 58, 0)
1383         /*
1384          * server < 2.12.58 doesn't pack default LMV in intent_getattr reply,
1385          * fetch default LMV here.
1386          */
1387         if (unlikely(err == -EREMOTE)) {
1388                 struct ll_inode_info    *lli = ll_i2info(dir);
1389                 struct lmv_user_md      *lum;
1390                 int                     lumsize;
1391                 int                     err2;
1392
1393                 ptlrpc_req_finished(request);
1394                 request = NULL;
1395
1396                 err2 = ll_dir_getstripe(dir, (void **)&lum, &lumsize, &request,
1397                                         OBD_MD_DEFAULT_MEA);
1398                 ll_finish_md_op_data(op_data);
1399                 op_data = NULL;
1400                 if (err2 == 0) {
1401                         struct lustre_md md = { NULL };
1402
1403                         md.body = req_capsule_server_get(&request->rq_pill,
1404                                                          &RMF_MDT_BODY);
1405                         if (!md.body)
1406                                 GOTO(err_exit, err = -EPROTO);
1407
1408                         OBD_ALLOC_PTR(md.default_lmv);
1409                         if (!md.default_lmv)
1410                                 GOTO(err_exit, err = -ENOMEM);
1411
1412                         md.default_lmv->lsm_md_magic = lum->lum_magic;
1413                         md.default_lmv->lsm_md_stripe_count =
1414                                 lum->lum_stripe_count;
1415                         md.default_lmv->lsm_md_master_mdt_index =
1416                                 lum->lum_stripe_offset;
1417                         md.default_lmv->lsm_md_hash_type = lum->lum_hash_type;
1418
1419                         err = ll_update_inode(dir, &md);
1420                         md_free_lustre_md(sbi->ll_md_exp, &md);
1421                         if (err)
1422                                 GOTO(err_exit, err);
1423                 } else if (err2 == -ENODATA && lli->lli_default_lsm_md) {
1424                         /*
1425                          * If there are no default stripe EA on the MDT, but the
1426                          * client has default stripe, then it probably means
1427                          * default stripe EA has just been deleted.
1428                          */
1429                         down_write(&lli->lli_lsm_sem);
1430                         if (lli->lli_default_lsm_md)
1431                                 OBD_FREE_PTR(lli->lli_default_lsm_md);
1432                         lli->lli_default_lsm_md = NULL;
1433                         up_write(&lli->lli_lsm_sem);
1434                 } else {
1435                         GOTO(err_exit, err);
1436                 }
1437
1438                 ptlrpc_req_finished(request);
1439                 request = NULL;
1440                 goto again;
1441         }
1442 #endif
1443
1444         if (err < 0)
1445                 GOTO(err_exit, err);
1446
1447         ll_update_times(request, dir);
1448
1449         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_NEWNODE_PAUSE, cfs_fail_val);
1450
1451         err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
1452         if (err)
1453                 GOTO(err_exit, err);
1454
1455         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1456                 /* must be done before d_instantiate, because it calls
1457                  * security_d_instantiate, which means a getxattr if security
1458                  * context is not set yet */
1459                 /* no need to protect selinux_inode_setsecurity() by
1460                  * inode_lock. Taking it would lead to a client deadlock
1461                  * LU-13617
1462                  */
1463                 err = security_inode_notifysecctx(inode,
1464                                                   op_data->op_file_secctx,
1465                                                   op_data->op_file_secctx_size);
1466                 if (err)
1467                         GOTO(err_exit, err);
1468         }
1469
1470         d_instantiate(dchild, inode);
1471
1472         if (encrypt) {
1473                 err = ll_set_encflags(inode, op_data->op_file_encctx,
1474                                       op_data->op_file_encctx_size, true);
1475                 if (err)
1476                         GOTO(err_exit, err);
1477         }
1478
1479         if (!(sbi->ll_flags & LL_SBI_FILE_SECCTX)) {
1480                 err = ll_inode_init_security(dchild, inode, dir);
1481                 if (err)
1482                         GOTO(err_exit, err);
1483         }
1484
1485         EXIT;
1486 err_exit:
1487         if (request != NULL)
1488                 ptlrpc_req_finished(request);
1489
1490         if (!IS_ERR_OR_NULL(op_data))
1491                 ll_finish_md_op_data(op_data);
1492
1493         RETURN(err);
1494 }
1495
1496 static int ll_mknod(struct inode *dir, struct dentry *dchild, umode_t mode,
1497                     dev_t rdev)
1498 {
1499         ktime_t kstart = ktime_get();
1500         int err;
1501         ENTRY;
1502
1503         CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p) mode %o dev %x\n",
1504                dchild, PFID(ll_inode2fid(dir)), dir, mode, rdev);
1505
1506         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1507                 mode &= ~current_umask();
1508
1509         switch (mode & S_IFMT) {
1510         case 0:
1511                 mode |= S_IFREG;
1512                 /* fallthrough */
1513         case S_IFREG:
1514         case S_IFCHR:
1515         case S_IFBLK:
1516         case S_IFIFO:
1517         case S_IFSOCK:
1518                 err = ll_new_node(dir, dchild, NULL, mode, old_encode_dev(rdev),
1519                                   LUSTRE_OPC_MKNOD);
1520                 break;
1521         case S_IFDIR:
1522                 err = -EPERM;
1523                 break;
1524         default:
1525                 err = -EINVAL;
1526         }
1527
1528         if (!err)
1529                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD,
1530                                    ktime_us_delta(ktime_get(), kstart));
1531
1532         RETURN(err);
1533 }
1534
1535 /*
1536  * Plain create. Intent create is handled in atomic_open.
1537  */
1538 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1539                         umode_t mode, bool want_excl)
1540 {
1541         ktime_t kstart = ktime_get();
1542         int rc;
1543
1544         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1545
1546         CDEBUG(D_VFSTRACE,
1547                "VFS Op:name=%pd, dir="DFID"(%p), flags=%u, excl=%d\n",
1548                dentry, PFID(ll_inode2fid(dir)), dir, mode, want_excl);
1549
1550         /* Using mknod(2) to create a regular file is designed to not recognize
1551          * volatile file name, so we use ll_mknod() here. */
1552         rc = ll_mknod(dir, dentry, mode, 0);
1553
1554         CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, unhashed %d\n",
1555                dentry, d_unhashed(dentry));
1556
1557         if (!rc)
1558                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE,
1559                                    ktime_us_delta(ktime_get(), kstart));
1560
1561         return rc;
1562 }
1563
1564 static int ll_symlink(struct inode *dir, struct dentry *dchild,
1565                       const char *oldpath)
1566 {
1567         ktime_t kstart = ktime_get();
1568         int err;
1569         ENTRY;
1570
1571         CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p), target=%.*s\n",
1572                dchild, PFID(ll_inode2fid(dir)), dir, 3000, oldpath);
1573
1574         err = ll_new_node(dir, dchild, oldpath, S_IFLNK | S_IRWXUGO, 0,
1575                           LUSTRE_OPC_SYMLINK);
1576
1577         if (!err)
1578                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK,
1579                                    ktime_us_delta(ktime_get(), kstart));
1580
1581         RETURN(err);
1582 }
1583
1584 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1585                    struct dentry *new_dentry)
1586 {
1587         struct inode *src = old_dentry->d_inode;
1588         struct qstr *name = &new_dentry->d_name;
1589         struct ll_sb_info *sbi = ll_i2sbi(dir);
1590         struct ptlrpc_request *request = NULL;
1591         struct md_op_data *op_data;
1592         ktime_t kstart = ktime_get();
1593         int err;
1594
1595         ENTRY;
1596         CDEBUG(D_VFSTRACE,
1597                "VFS Op: inode="DFID"(%p), dir="DFID"(%p), target=%pd\n",
1598                PFID(ll_inode2fid(src)), src,
1599                PFID(ll_inode2fid(dir)), dir, new_dentry);
1600
1601         err = llcrypt_prepare_link(old_dentry, dir, new_dentry);
1602         if (err)
1603                 RETURN(err);
1604
1605         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1606                                      0, LUSTRE_OPC_ANY, NULL);
1607         if (IS_ERR(op_data))
1608                 RETURN(PTR_ERR(op_data));
1609
1610         err = md_link(sbi->ll_md_exp, op_data, &request);
1611         ll_finish_md_op_data(op_data);
1612         if (err)
1613                 GOTO(out, err);
1614
1615         ll_update_times(request, dir);
1616         ll_stats_ops_tally(sbi, LPROC_LL_LINK,
1617                            ktime_us_delta(ktime_get(), kstart));
1618         EXIT;
1619 out:
1620         ptlrpc_req_finished(request);
1621         RETURN(err);
1622 }
1623
1624 static int ll_mkdir(struct inode *dir, struct dentry *dchild, umode_t mode)
1625 {
1626         ktime_t kstart = ktime_get();
1627         int err;
1628         ENTRY;
1629
1630         CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p)\n",
1631                dchild, PFID(ll_inode2fid(dir)), dir);
1632
1633         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1634                 mode &= ~current_umask();
1635
1636         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1637
1638         err = ll_new_node(dir, dchild, NULL, mode, 0, LUSTRE_OPC_MKDIR);
1639         if (err == 0)
1640                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR,
1641                                    ktime_us_delta(ktime_get(), kstart));
1642
1643         RETURN(err);
1644 }
1645
1646 static int ll_rmdir(struct inode *dir, struct dentry *dchild)
1647 {
1648         struct qstr *name = &dchild->d_name;
1649         struct ptlrpc_request *request = NULL;
1650         struct md_op_data *op_data;
1651         ktime_t kstart = ktime_get();
1652         int rc;
1653
1654         ENTRY;
1655
1656         CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p)\n",
1657                dchild, PFID(ll_inode2fid(dir)), dir);
1658
1659         if (unlikely(d_mountpoint(dchild)))
1660                 RETURN(-EBUSY);
1661
1662         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1663                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1664         if (IS_ERR(op_data))
1665                 RETURN(PTR_ERR(op_data));
1666
1667         if (dchild->d_inode != NULL)
1668                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1669
1670         op_data->op_fid2 = op_data->op_fid3;
1671         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1672         ll_finish_md_op_data(op_data);
1673         if (!rc)
1674                 ll_update_times(request, dir);
1675
1676         ptlrpc_req_finished(request);
1677         if (!rc)
1678                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR,
1679                                    ktime_us_delta(ktime_get(), kstart));
1680         RETURN(rc);
1681 }
1682
1683 /**
1684  * Remove dir entry
1685  **/
1686 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1687 {
1688         struct ptlrpc_request *request = NULL;
1689         struct md_op_data *op_data;
1690         ktime_t kstart = ktime_get();
1691         int rc;
1692         ENTRY;
1693
1694         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1695                namelen, name, PFID(ll_inode2fid(dir)), dir);
1696
1697         op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1698                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1699         if (IS_ERR(op_data))
1700                 RETURN(PTR_ERR(op_data));
1701         op_data->op_cli_flags |= CLI_RM_ENTRY;
1702         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1703         ll_finish_md_op_data(op_data);
1704         if (!rc)
1705                 ll_update_times(request, dir);
1706
1707         ptlrpc_req_finished(request);
1708         if (!rc)
1709                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR,
1710                                    ktime_us_delta(ktime_get(), kstart));
1711         RETURN(rc);
1712 }
1713
1714 static int ll_unlink(struct inode *dir, struct dentry *dchild)
1715 {
1716         struct qstr *name = &dchild->d_name;
1717         struct ptlrpc_request *request = NULL;
1718         struct md_op_data *op_data;
1719         struct mdt_body *body;
1720         ktime_t kstart = ktime_get();
1721         int rc;
1722
1723         ENTRY;
1724
1725         CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p)\n",
1726                dchild, PFID(ll_inode2fid(dir)), dir);
1727
1728         /*
1729          * XXX: unlink bind mountpoint maybe call to here,
1730          * just check it as vfs_unlink does.
1731          */
1732         if (unlikely(d_mountpoint(dchild)))
1733                 RETURN(-EBUSY);
1734
1735         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len, 0,
1736                                      LUSTRE_OPC_ANY, NULL);
1737         if (IS_ERR(op_data))
1738                 RETURN(PTR_ERR(op_data));
1739
1740         op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1741         /* notify lower layer if inode has dirty pages */
1742         if (S_ISREG(dchild->d_inode->i_mode) &&
1743             ll_i2info(dchild->d_inode)->lli_clob &&
1744             dirty_cnt(dchild->d_inode))
1745                 op_data->op_cli_flags |= CLI_DIRTY_DATA;
1746         op_data->op_fid2 = op_data->op_fid3;
1747         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1748         ll_finish_md_op_data(op_data);
1749         if (rc)
1750                 GOTO(out, rc);
1751
1752         /*
1753          * The server puts attributes in on the last unlink, use them to update
1754          * the link count so the inode can be freed immediately.
1755          */
1756         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1757         if (body->mbo_valid & OBD_MD_FLNLINK)
1758                 set_nlink(dchild->d_inode, body->mbo_nlink);
1759
1760         ll_update_times(request, dir);
1761
1762 out:
1763         ptlrpc_req_finished(request);
1764         if (!rc)
1765                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK,
1766                                    ktime_us_delta(ktime_get(), kstart));
1767         RETURN(rc);
1768 }
1769
1770 static int ll_rename(struct inode *src, struct dentry *src_dchild,
1771                      struct inode *tgt, struct dentry *tgt_dchild
1772 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
1773                      , unsigned int flags
1774 #endif
1775                      )
1776 {
1777         struct qstr *src_name = &src_dchild->d_name;
1778         struct qstr *tgt_name = &tgt_dchild->d_name;
1779         struct ptlrpc_request *request = NULL;
1780         struct ll_sb_info *sbi = ll_i2sbi(src);
1781         struct md_op_data *op_data;
1782         ktime_t kstart = ktime_get();
1783         int err;
1784         ENTRY;
1785
1786 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
1787         if (flags)
1788                 return -EINVAL;
1789 #endif
1790
1791         CDEBUG(D_VFSTRACE,
1792                "VFS Op:oldname=%pd, src_dir="DFID"(%p), newname=%pd, tgt_dir="DFID"(%p)\n",
1793                src_dchild, PFID(ll_inode2fid(src)), src,
1794                tgt_dchild, PFID(ll_inode2fid(tgt)), tgt);
1795
1796         if (unlikely(d_mountpoint(src_dchild) || d_mountpoint(tgt_dchild)))
1797                 RETURN(-EBUSY);
1798
1799 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
1800         err = llcrypt_prepare_rename(src, src_dchild, tgt, tgt_dchild, flags);
1801 #else
1802         err = llcrypt_prepare_rename(src, src_dchild, tgt, tgt_dchild, 0);
1803 #endif
1804         if (err)
1805                 RETURN(err);
1806
1807         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1808                                      LUSTRE_OPC_ANY, NULL);
1809         if (IS_ERR(op_data))
1810                 RETURN(PTR_ERR(op_data));
1811
1812         if (src_dchild->d_inode != NULL)
1813                 op_data->op_fid3 = *ll_inode2fid(src_dchild->d_inode);
1814
1815         if (tgt_dchild->d_inode != NULL)
1816                 op_data->op_fid4 = *ll_inode2fid(tgt_dchild->d_inode);
1817
1818         err = md_rename(sbi->ll_md_exp, op_data,
1819                         src_name->name, src_name->len,
1820                         tgt_name->name, tgt_name->len, &request);
1821         ll_finish_md_op_data(op_data);
1822         if (!err) {
1823                 ll_update_times(request, src);
1824                 ll_update_times(request, tgt);
1825         }
1826
1827         ptlrpc_req_finished(request);
1828
1829         if (!err) {
1830                 d_move(src_dchild, tgt_dchild);
1831                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME,
1832                                    ktime_us_delta(ktime_get(), kstart));
1833         }
1834
1835         RETURN(err);
1836 }
1837
1838 const struct inode_operations ll_dir_inode_operations = {
1839         .mknod          = ll_mknod,
1840         .atomic_open    = ll_atomic_open,
1841         .lookup         = ll_lookup_nd,
1842         .create         = ll_create_nd,
1843         /* We need all these non-raw things for NFSD, to not patch it. */
1844         .unlink         = ll_unlink,
1845         .mkdir          = ll_mkdir,
1846         .rmdir          = ll_rmdir,
1847         .symlink        = ll_symlink,
1848         .link           = ll_link,
1849         .rename         = ll_rename,
1850         .setattr        = ll_setattr,
1851         .getattr        = ll_getattr,
1852         .permission     = ll_inode_permission,
1853 #ifdef HAVE_IOP_XATTR
1854         .setxattr       = ll_setxattr,
1855         .getxattr       = ll_getxattr,
1856         .removexattr    = ll_removexattr,
1857 #endif
1858         .listxattr      = ll_listxattr,
1859         .get_acl        = ll_get_acl,
1860 #ifdef HAVE_IOP_SET_ACL
1861         .set_acl        = ll_set_acl,
1862 #endif
1863 };
1864
1865 const struct inode_operations ll_special_inode_operations = {
1866         .setattr        = ll_setattr,
1867         .getattr        = ll_getattr,
1868         .permission     = ll_inode_permission,
1869 #ifdef HAVE_IOP_XATTR
1870         .setxattr       = ll_setxattr,
1871         .getxattr       = ll_getxattr,
1872         .removexattr    = ll_removexattr,
1873 #endif
1874         .listxattr      = ll_listxattr,
1875         .get_acl        = ll_get_acl,
1876 #ifdef HAVE_IOP_SET_ACL
1877         .set_acl        = ll_set_acl,
1878 #endif
1879 };