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, 2016, 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 <lustre_ver.h>
  51 #include "llite_internal.h"
  52
  53 static int ll_create_it(struct inode *dir, struct dentry *dentry,
  54                         struct lookup_intent *it,
  55                         void *secctx, __u32 secctxlen);
  56
  57 /* called from iget5_locked->find_inode() under inode_lock spinlock */
  58 static int ll_test_inode(struct inode *inode, void *opaque)
  59 {
  60         struct ll_inode_info    *lli = ll_i2info(inode);
  61         struct lustre_md        *md = opaque;
  62
  63         if (unlikely(!(md->body->mbo_valid & OBD_MD_FLID))) {
  64                 CERROR("MDS body missing FID\n");
  65                 return 0;
  66         }
  67
  68         if (!lu_fid_eq(&lli->lli_fid, &md->body->mbo_fid1))
  69                 return 0;
  70
  71         return 1;
  72 }
  73
  74 static int ll_set_inode(struct inode *inode, void *opaque)
  75 {
  76         struct ll_inode_info *lli = ll_i2info(inode);
  77         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
  78
  79         if (unlikely(!(body->mbo_valid & OBD_MD_FLID))) {
  80                 CERROR("MDS body missing FID\n");
  81                 return -EINVAL;
  82         }
  83
  84         lli->lli_fid = body->mbo_fid1;
  85         if (unlikely(!(body->mbo_valid & OBD_MD_FLTYPE))) {
  86                 CERROR("Can not initialize inode "DFID" without object type: "
  87                        "valid = %#llx\n",
  88                        PFID(&lli->lli_fid), body->mbo_valid);
  89                 return -EINVAL;
  90         }
  91
  92         inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mbo_mode & S_IFMT);
  93         if (unlikely(inode->i_mode == 0)) {
  94                 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
  95                 return -EINVAL;
  96         }
  97
  98         ll_lli_init(lli);
  99
 100         return 0;
 101 }
 102
 103
 104 /**
 105  * Get an inode by inode number(@hash), which is already instantiated by
 106  * the intent lookup).
 107  */
 108 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 109                       struct lustre_md *md)
 110 {
 111         struct inode    *inode;
 112         int             rc = 0;
 113
 114         ENTRY;
 115
 116         LASSERT(hash != 0);
 117         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
 118         if (inode == NULL)
 119                 RETURN(ERR_PTR(-ENOMEM));
 120
 121         if (inode->i_state & I_NEW) {
 122                 rc = ll_read_inode2(inode, md);
 123                 if (rc == 0 && S_ISREG(inode->i_mode) &&
 124                     ll_i2info(inode)->lli_clob == NULL)
 125                         rc = cl_file_inode_init(inode, md);
 126
 127                 if (rc != 0) {
 128                         /* Let's clear directory lsm here, otherwise
 129                          * make_bad_inode() will reset the inode mode
 130                          * to regular, then ll_clear_inode will not
 131                          * be able to clear lsm_md */
 132                         if (S_ISDIR(inode->i_mode))
 133                                 ll_dir_clear_lsm_md(inode);
 134                         make_bad_inode(inode);
 135                         unlock_new_inode(inode);
 136                         iput(inode);
 137                         inode = ERR_PTR(rc);
 138                 } else {
 139                         inode_has_no_xattr(inode);
 140                         unlock_new_inode(inode);
 141                 }
 142         } else if (is_bad_inode(inode)) {
 143                 iput(inode);
 144                 inode = ERR_PTR(-ESTALE);
 145         } else if (!(inode->i_state & (I_FREEING | I_CLEAR))) {
 146                 rc = ll_update_inode(inode, md);
 147                 CDEBUG(D_VFSTRACE, "got inode: "DFID"(%p): rc = %d\n",
 148                        PFID(&md->body->mbo_fid1), inode, rc);
 149                 if (rc != 0) {
 150                         if (S_ISDIR(inode->i_mode))
 151                                 ll_dir_clear_lsm_md(inode);
 152                         iput(inode);
 153                         inode = ERR_PTR(rc);
 154                 }
 155         }
 156
 157         RETURN(inode);
 158 }
 159
 160 static void ll_invalidate_negative_children(struct inode *dir)
 161 {
 162         struct dentry *dentry, *tmp_subdir;
 163         DECLARE_LL_D_HLIST_NODE_PTR(p);
 164
 165         ll_lock_dcache(dir);
 166         ll_d_hlist_for_each_entry(dentry, p, &dir->i_dentry) {
 167                 spin_lock(&dentry->d_lock);
 168                 if (!list_empty(&dentry->d_subdirs)) {
 169                         struct dentry *child;
 170
 171                         list_for_each_entry_safe(child, tmp_subdir,
 172                                                  &dentry->d_subdirs,
 173                                                  d_child) {
 174                                 if (child->d_inode == NULL)
 175                                         d_lustre_invalidate(child, 1);
 176                         }
 177                 }
 178                 spin_unlock(&dentry->d_lock);
 179         }
 180         ll_unlock_dcache(dir);
 181 }
 182
 183 int ll_test_inode_by_fid(struct inode *inode, void *opaque)
 184 {
 185         return lu_fid_eq(&ll_i2info(inode)->lli_fid, opaque);
 186 }
 187
 188 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 189                        void *data, int flag)
 190 {
 191         struct lustre_handle lockh;
 192         int rc;
 193         ENTRY;
 194
 195         switch (flag) {
 196         case LDLM_CB_BLOCKING:
 197                 ldlm_lock2handle(lock, &lockh);
 198                 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
 199                 if (rc < 0) {
 200                         CDEBUG(D_INODE, "ldlm_cli_cancel: rc = %d\n", rc);
 201                         RETURN(rc);
 202                 }
 203                 break;
 204         case LDLM_CB_CANCELING: {
 205                 struct inode *inode = ll_inode_from_resource_lock(lock);
 206                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 207
 208                 /* Inode is set to lock->l_resource->lr_lvb_inode
 209                  * for mdc - bug 24555 */
 210                 LASSERT(lock->l_ast_data == NULL);
 211
 212                 if (inode == NULL)
 213                         break;
 214
 215                 /* Invalidate all dentries associated with this inode */
 216                 LASSERT(ldlm_is_canceling(lock));
 217
 218                 if (!fid_res_name_eq(ll_inode2fid(inode),
 219                                      &lock->l_resource->lr_name)) {
 220                         LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
 221                                    PFID(ll_inode2fid(inode)), inode);
 222                         LBUG();
 223                 }
 224
 225                 if (bits & MDS_INODELOCK_XATTR) {
 226                         if (S_ISDIR(inode->i_mode))
 227                                 ll_i2info(inode)->lli_def_stripe_offset = -1;
 228                         ll_xattr_cache_destroy(inode);
 229                         bits &= ~MDS_INODELOCK_XATTR;
 230                 }
 231
 232                 /* For OPEN locks we differentiate between lock modes
 233                  * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
 234                 if (bits & MDS_INODELOCK_OPEN)
 235                         ll_have_md_lock(inode, &bits, lock->l_req_mode);
 236
 237                 if (bits & MDS_INODELOCK_OPEN) {
 238                         fmode_t fmode;
 239
 240                         switch (lock->l_req_mode) {
 241                         case LCK_CW:
 242                                 fmode = FMODE_WRITE;
 243                                 break;
 244                         case LCK_PR:
 245                                 fmode = FMODE_EXEC;
 246                                 break;
 247                         case LCK_CR:
 248                                 fmode = FMODE_READ;
 249                                 break;
 250                         default:
 251                                 LDLM_ERROR(lock, "bad lock mode for OPEN lock");
 252                                 LBUG();
 253                         }
 254
 255                         ll_md_real_close(inode, fmode);
 256
 257                         bits &= ~MDS_INODELOCK_OPEN;
 258                 }
 259
 260                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
 261                             MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM))
 262                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
 263
 264                 if (bits & MDS_INODELOCK_LAYOUT) {
 265                         struct cl_object_conf conf = {
 266                                 .coc_opc = OBJECT_CONF_INVALIDATE,
 267                                 .coc_inode = inode,
 268                         };
 269
 270                         rc = ll_layout_conf(inode, &conf);
 271                         if (rc < 0)
 272                                 CDEBUG(D_INODE, "cannot invalidate layout of "
 273                                        DFID": rc = %d\n",
 274                                        PFID(ll_inode2fid(inode)), rc);
 275                 }
 276
 277                 if (bits & MDS_INODELOCK_UPDATE) {
 278                         struct ll_inode_info *lli = ll_i2info(inode);
 279                         lli->lli_update_atime = 1;
 280                 }
 281
 282                 if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
 283                         struct ll_inode_info *lli = ll_i2info(inode);
 284
 285                         CDEBUG(D_INODE, "invalidating inode "DFID" lli = %p, "
 286                                "pfid  = "DFID"\n", PFID(ll_inode2fid(inode)),
 287                                lli, PFID(&lli->lli_pfid));
 288                         truncate_inode_pages(inode->i_mapping, 0);
 289
 290                         if (unlikely(!fid_is_zero(&lli->lli_pfid))) {
 291                                 struct inode *master_inode = NULL;
 292                                 unsigned long hash;
 293
 294                                 /* This is slave inode, since all of the child
 295                                  * dentry is connected on the master inode, so
 296                                  * we have to invalidate the negative children
 297                                  * on master inode */
 298                                 CDEBUG(D_INODE, "Invalidate s"DFID" m"DFID"\n",
 299                                        PFID(ll_inode2fid(inode)),
 300                                        PFID(&lli->lli_pfid));
 301
 302                                 hash = cl_fid_build_ino(&lli->lli_pfid,
 303                                         ll_need_32bit_api(ll_i2sbi(inode)));
 304
 305                                 /* Do not lookup the inode with ilookup5,
 306                                  * otherwise it will cause dead lock,
 307                                  *
 308                                  * 1. Client1 send chmod req to the MDT0, then
 309                                  * on MDT0, it enqueues master and all of its
 310                                  * slaves lock, (mdt_attr_set() ->
 311                                  * mdt_lock_slaves()), after gets master and
 312                                  * stripe0 lock, it will send the enqueue req
 313                                  * (for stripe1) to MDT1, then MDT1 finds the
 314                                  * lock has been granted to client2. Then MDT1
 315                                  * sends blocking ast to client2.
 316                                  *
 317                                  * 2. At the same time, client2 tries to unlink
 318                                  * the striped dir (rm -rf striped_dir), and
 319                                  * during lookup, it will hold the master inode
 320                                  * of the striped directory, whose inode state
 321                                  * is NEW, then tries to revalidate all of its
 322                                  * slaves, (ll_prep_inode()->ll_iget()->
 323                                  * ll_read_inode2()-> ll_update_inode().). And
 324                                  * it will be blocked on the server side because
 325                                  * of 1.
 326                                  *
 327                                  * 3. Then the client get the blocking_ast req,
 328                                  * cancel the lock, but being blocked if using
 329                                  * ->ilookup5()), because master inode state is
 330                                  *  NEW. */
 331                                 master_inode = ilookup5_nowait(inode->i_sb,
 332                                                     hash, ll_test_inode_by_fid,
 333                                                         (void *)&lli->lli_pfid);
 334                                 if (master_inode) {
 335                                         ll_invalidate_negative_children(
 336                                                                 master_inode);
 337                                         iput(master_inode);
 338                                 }
 339                         } else {
 340                                 ll_invalidate_negative_children(inode);
 341                         }
 342                 }
 343
 344                 if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
 345                     inode->i_sb->s_root != NULL &&
 346                     inode != inode->i_sb->s_root->d_inode)
 347                         ll_invalidate_aliases(inode);
 348
 349                 iput(inode);
 350                 break;
 351         }
 352         default:
 353                 LBUG();
 354         }
 355
 356         RETURN(0);
 357 }
 358
 359 __u32 ll_i2suppgid(struct inode *i)
 360 {
 361         if (in_group_p(i->i_gid))
 362                 return (__u32)from_kgid(&init_user_ns, i->i_gid);
 363         else
 364                 return (__u32) __kgid_val(INVALID_GID);
 365 }
 366
 367 /* Pack the required supplementary groups into the supplied groups array.
 368  * If we don't need to use the groups from the target inode(s) then we
 369  * instead pack one or more groups from the user's supplementary group
 370  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 371 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 372 {
 373         LASSERT(i1 != NULL);
 374         LASSERT(suppgids != NULL);
 375
 376         suppgids[0] = ll_i2suppgid(i1);
 377
 378         if (i2)
 379                 suppgids[1] = ll_i2suppgid(i2);
 380         else
 381                 suppgids[1] = -1;
 382 }
 383
 384 /*
 385  * try to reuse three types of dentry:
 386  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
 387  *    by concurrent .revalidate).
 388  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
 389  *    be cleared by others calling d_lustre_revalidate).
 390  * 3. DISCONNECTED alias.
 391  */
 392 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
 393 {
 394         struct dentry *alias, *discon_alias, *invalid_alias;
 395         DECLARE_LL_D_HLIST_NODE_PTR(p);
 396
 397         if (ll_d_hlist_empty(&inode->i_dentry))
 398                 return NULL;
 399
 400         discon_alias = invalid_alias = NULL;
 401
 402         ll_lock_dcache(inode);
 403         ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry) {
 404                 LASSERT(alias != dentry);
 405
 406                 spin_lock(&alias->d_lock);
 407                 if ((alias->d_flags & DCACHE_DISCONNECTED) &&
 408                     S_ISDIR(inode->i_mode))
 409                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
 410                         discon_alias = alias;
 411                 else if (alias->d_parent == dentry->d_parent             &&
 412                          alias->d_name.hash == dentry->d_name.hash       &&
 413                          alias->d_name.len == dentry->d_name.len         &&
 414                          memcmp(alias->d_name.name, dentry->d_name.name,
 415                                 dentry->d_name.len) == 0)
 416                         invalid_alias = alias;
 417                 spin_unlock(&alias->d_lock);
 418
 419                 if (invalid_alias)
 420                         break;
 421         }
 422         alias = invalid_alias ?: discon_alias ?: NULL;
 423         if (alias) {
 424                 spin_lock(&alias->d_lock);
 425                 dget_dlock(alias);
 426                 spin_unlock(&alias->d_lock);
 427         }
 428         ll_unlock_dcache(inode);
 429
 430         return alias;
 431 }
 432
 433 /*
 434  * Similar to d_splice_alias(), but lustre treats invalid alias
 435  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
 436  */
 437 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
 438 {
 439         struct dentry *new;
 440         int rc;
 441
 442         if (inode) {
 443                 new = ll_find_alias(inode, de);
 444                 if (new) {
 445                         rc = ll_d_init(new);
 446                         if (rc < 0) {
 447                                 dput(new);
 448                                 return ERR_PTR(rc);
 449                         }
 450                         d_move(new, de);
 451                         iput(inode);
 452                         CDEBUG(D_DENTRY,
 453                                "Reuse dentry %p inode %p refc %d flags %#x\n",
 454                               new, new->d_inode, ll_d_count(new), new->d_flags);
 455                         return new;
 456                 }
 457         }
 458         rc = ll_d_init(de);
 459         if (rc < 0)
 460                 return ERR_PTR(rc);
 461         d_add(de, inode);
 462         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
 463                de, de->d_inode, ll_d_count(de), de->d_flags);
 464         return de;
 465 }
 466
 467 static int ll_lookup_it_finish(struct ptlrpc_request *request,
 468                                struct lookup_intent *it,
 469                                struct inode *parent, struct dentry **de)
 470 {
 471         struct inode             *inode = NULL;
 472         __u64                     bits = 0;
 473         int                       rc;
 474         struct dentry *alias;
 475         ENTRY;
 476
 477         /* NB 1 request reference will be taken away by ll_intent_lock()
 478          * when I return */
 479         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
 480                it->it_disposition);
 481         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 482                 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
 483                 if (rc)
 484                         RETURN(rc);
 485
 486                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
 487
 488                 /* We used to query real size from OSTs here, but actually
 489                    this is not needed. For stat() calls size would be updated
 490                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 491                    2.4 and
 492                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 493                    Everybody else who needs correct file size would call
 494                    ll_glimpse_size or some equivalent themselves anyway.
 495                    Also see bug 7198. */
 496         }
 497
 498         /* Only hash *de if it is unhashed (new dentry).
 499          * Atoimc_open may passin hashed dentries for open.
 500          */
 501         alias = ll_splice_alias(inode, *de);
 502         if (IS_ERR(alias))
 503                 GOTO(out, rc = PTR_ERR(alias));
 504
 505         *de = alias;
 506
 507         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 508                 /* we have lookup look - unhide dentry */
 509                 if (bits & MDS_INODELOCK_LOOKUP)
 510                         d_lustre_revalidate(*de);
 511         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
 512                 /* If file created on server, don't depend on parent UPDATE
 513                  * lock to unhide it. It is left hidden and next lookup can
 514                  * find it in ll_splice_alias.
 515                  */
 516                 /* Check that parent has UPDATE lock. */
 517                 struct lookup_intent parent_it = {
 518                                         .it_op = IT_GETATTR,
 519                                         .it_lock_handle = 0 };
 520                 struct lu_fid   fid = ll_i2info(parent)->lli_fid;
 521
 522                 /* If it is striped directory, get the real stripe parent */
 523                 if (unlikely(ll_i2info(parent)->lli_lsm_md != NULL)) {
 524                         rc = md_get_fid_from_lsm(ll_i2mdexp(parent),
 525                                                  ll_i2info(parent)->lli_lsm_md,
 526                                                  (*de)->d_name.name,
 527                                                  (*de)->d_name.len, &fid);
 528                         if (rc != 0)
 529                                 GOTO(out, rc);
 530                 }
 531
 532                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it, &fid,
 533                                        NULL)) {
 534                         d_lustre_revalidate(*de);
 535                         ll_intent_release(&parent_it);
 536                 }
 537         }
 538
 539         GOTO(out, rc = 0);
 540
 541 out:
 542         if (rc != 0 && it->it_op & IT_OPEN)
 543                 ll_open_cleanup((*de)->d_sb, request);
 544
 545         return rc;
 546 }
 547
 548 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 549                                    struct lookup_intent *it,
 550                                    void **secctx, __u32 *secctxlen)
 551 {
 552         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 553         struct dentry *save = dentry, *retval;
 554         struct ptlrpc_request *req = NULL;
 555         struct md_op_data *op_data = NULL;
 556         __u32 opc;
 557         int rc;
 558         ENTRY;
 559
 560         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 561                 RETURN(ERR_PTR(-ENAMETOOLONG));
 562
 563         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
 564                dentry->d_name.len, dentry->d_name.name,
 565                PFID(ll_inode2fid(parent)), parent, LL_IT2STR(it));
 566
 567         if (d_mountpoint(dentry))
 568                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 569
 570         if (it == NULL || it->it_op == IT_GETXATTR)
 571                 it = &lookup_it;
 572
 573         if (it->it_op == IT_GETATTR && dentry_may_statahead(parent, dentry)) {
 574                 rc = ll_statahead(parent, &dentry, 0);
 575                 if (rc == 1)
 576                         RETURN(dentry == save ? NULL : dentry);
 577         }
 578
 579         if (it->it_op & IT_OPEN && it->it_flags & FMODE_WRITE &&
 580             dentry->d_sb->s_flags & MS_RDONLY)
 581                 RETURN(ERR_PTR(-EROFS));
 582
 583         if (it->it_op & IT_CREAT)
 584                 opc = LUSTRE_OPC_CREATE;
 585         else
 586                 opc = LUSTRE_OPC_ANY;
 587
 588         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 589                                      dentry->d_name.len, 0, opc, NULL);
 590         if (IS_ERR(op_data))
 591                 GOTO(out, retval = ERR_CAST(op_data));
 592
 593         /* enforce umask if acl disabled or MDS doesn't support umask */
 594         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 595                 it->it_create_mode &= ~current_umask();
 596
 597         if (it->it_op & IT_CREAT &&
 598             ll_i2sbi(parent)->ll_flags & LL_SBI_FILE_SECCTX) {
 599                 rc = ll_dentry_init_security(dentry, it->it_create_mode,
 600                                              &dentry->d_name,
 601                                              &op_data->op_file_secctx_name,
 602                                              &op_data->op_file_secctx,
 603                                              &op_data->op_file_secctx_size);
 604                 if (rc < 0)
 605                         GOTO(out, retval = ERR_PTR(rc));
 606                 if (secctx != NULL)
 607                         *secctx = op_data->op_file_secctx;
 608                 if (secctxlen != NULL)
 609                         *secctxlen = op_data->op_file_secctx_size;
 610         }
 611
 612         rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
 613                             &ll_md_blocking_ast, 0);
 614         /* If the MDS allows the client to chgrp (CFS_SETGRP_PERM), but the
 615          * client does not know which suppgid should be sent to the MDS, or
 616          * some other(s) changed the target file's GID after this RPC sent
 617          * to the MDS with the suppgid as the original GID, then we should
 618          * try again with right suppgid. */
 619         if (rc == -EACCES && it->it_op & IT_OPEN &&
 620             it_disposition(it, DISP_OPEN_DENY)) {
 621                 struct mdt_body *body;
 622
 623                 LASSERT(req != NULL);
 624
 625                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 626                 if (op_data->op_suppgids[0] == body->mbo_gid ||
 627                     op_data->op_suppgids[1] == body->mbo_gid ||
 628                     !in_group_p(make_kgid(&init_user_ns, body->mbo_gid)))
 629                         GOTO(out, retval = ERR_PTR(-EACCES));
 630
 631                 fid_zero(&op_data->op_fid2);
 632                 op_data->op_suppgids[1] = body->mbo_gid;
 633                 ptlrpc_req_finished(req);
 634                 req = NULL;
 635                 ll_intent_release(it);
 636                 rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
 637                                     &ll_md_blocking_ast, 0);
 638         }
 639
 640         if (rc < 0)
 641                 GOTO(out, retval = ERR_PTR(rc));
 642
 643         rc = ll_lookup_it_finish(req, it, parent, &dentry);
 644         if (rc != 0) {
 645                 ll_intent_release(it);
 646                 GOTO(out, retval = ERR_PTR(rc));
 647         }
 648
 649         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 650             !S_ISREG(dentry->d_inode->i_mode) &&
 651             !S_ISDIR(dentry->d_inode->i_mode)) {
 652                 ll_release_openhandle(dentry, it);
 653         }
 654         ll_lookup_finish_locks(it, dentry);
 655
 656         GOTO(out, retval = (dentry == save) ? NULL : dentry);
 657
 658 out:
 659         if (op_data != NULL && !IS_ERR(op_data)) {
 660                 if (secctx != NULL && secctxlen != NULL) {
 661                         /* caller needs sec ctx info, so reset it in op_data to
 662                          * prevent it from being freed */
 663                         op_data->op_file_secctx = NULL;
 664                         op_data->op_file_secctx_size = 0;
 665                 }
 666                 ll_finish_md_op_data(op_data);
 667         }
 668
 669         ptlrpc_req_finished(req);
 670         return retval;
 671 }
 672
 673 #ifdef HAVE_IOP_ATOMIC_OPEN
 674 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 675                                    unsigned int flags)
 676 {
 677         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
 678         struct dentry *de;
 679
 680         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), flags=%u\n",
 681                dentry->d_name.len, dentry->d_name.name,
 682                PFID(ll_inode2fid(parent)), parent, flags);
 683
 684         /*
 685          * Optimize away (CREATE && !OPEN). Let .create handle the race.
 686          * but only if we have write permissions there, otherwise we need
 687          * to proceed with lookup. LU-4185
 688          */
 689         if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN) &&
 690             (inode_permission(parent, MAY_WRITE | MAY_EXEC) == 0))
 691                 return NULL;
 692
 693         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
 694                 itp = NULL;
 695         else
 696                 itp = &it;
 697         de = ll_lookup_it(parent, dentry, itp, NULL, NULL);
 698
 699         if (itp != NULL)
 700                 ll_intent_release(itp);
 701
 702         return de;
 703 }
 704
 705 /*
 706  * For cached negative dentry and new dentry, handle lookup/create/open
 707  * together.
 708  */
 709 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
 710                           struct file *file, unsigned open_flags,
 711                           umode_t mode, int *opened)
 712 {
 713         struct lookup_intent *it;
 714         struct dentry *de;
 715         long long lookup_flags = LOOKUP_OPEN;
 716         void *secctx = NULL;
 717         __u32 secctxlen = 0;
 718         int rc = 0;
 719         ENTRY;
 720
 721         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), file %p,"
 722                            "open_flags %x, mode %x opened %d\n",
 723                dentry->d_name.len, dentry->d_name.name,
 724                PFID(ll_inode2fid(dir)), dir, file, open_flags, mode, *opened);
 725
 726         /* Only negative dentries enter here */
 727         LASSERT(dentry->d_inode == NULL);
 728
 729         if (!d_unhashed(dentry)) {
 730                 /* A valid negative dentry that just passed revalidation,
 731                  * there's little point to try and open it server-side,
 732                  * even though there's a minuscule chance it might succeed.
 733                  * Either way it's a valid race to just return -ENOENT here.
 734                  */
 735                 if (!(open_flags & O_CREAT))
 736                         return -ENOENT;
 737
 738                 /* Otherwise we just unhash it to be rehashed afresh via
 739                  * lookup if necessary
 740                  */
 741                 d_drop(dentry);
 742         }
 743
 744         OBD_ALLOC(it, sizeof(*it));
 745         if (!it)
 746                 RETURN(-ENOMEM);
 747
 748         it->it_op = IT_OPEN;
 749         if (open_flags & O_CREAT) {
 750                 it->it_op |= IT_CREAT;
 751                 lookup_flags |= LOOKUP_CREATE;
 752         }
 753         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
 754         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
 755         it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
 756
 757         /* Dentry added to dcache tree in ll_lookup_it */
 758         de = ll_lookup_it(dir, dentry, it, &secctx, &secctxlen);
 759         if (IS_ERR(de))
 760                 rc = PTR_ERR(de);
 761         else if (de != NULL)
 762                 dentry = de;
 763
 764         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
 765
 766         if (!rc) {
 767                 if (it_disposition(it, DISP_OPEN_CREATE)) {
 768                         /* Dentry instantiated in ll_create_it. */
 769                         rc = ll_create_it(dir, dentry, it, secctx, secctxlen);
 770                         security_release_secctx(secctx, secctxlen);
 771                         if (rc) {
 772                                 /* We dget in ll_splice_alias. */
 773                                 if (de != NULL)
 774                                         dput(de);
 775                                 goto out_release;
 776                         }
 777
 778                         *opened |= FILE_CREATED;
 779                 }
 780                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
 781                         /* Open dentry. */
 782                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
 783                                 /* We cannot call open here as it might
 784                                  * deadlock. This case is unreachable in
 785                                  * practice because of OBD_CONNECT_NODEVOH. */
 786                                 rc = finish_no_open(file, de);
 787                         } else {
 788                                 file->private_data = it;
 789                                 rc = finish_open(file, dentry, NULL, opened);
 790                                 /* We dget in ll_splice_alias. finish_open takes
 791                                  * care of dget for fd open.
 792                                  */
 793                                 if (de != NULL)
 794                                         dput(de);
 795                         }
 796                 } else {
 797                         rc = finish_no_open(file, de);
 798                 }
 799         }
 800
 801 out_release:
 802         ll_intent_release(it);
 803         OBD_FREE(it, sizeof(*it));
 804
 805         RETURN(rc);
 806 }
 807
 808 #else /* !HAVE_IOP_ATOMIC_OPEN */
 809 static struct lookup_intent *
 810 ll_convert_intent(struct open_intent *oit, int lookup_flags, bool is_readonly)
 811 {
 812         struct lookup_intent *it;
 813
 814         OBD_ALLOC_PTR(it);
 815         if (!it)
 816                 return ERR_PTR(-ENOMEM);
 817
 818         if (lookup_flags & LOOKUP_OPEN) {
 819                 it->it_op = IT_OPEN;
 820                 /* Avoid file creation for ro bind mount point(is_readonly) */
 821                 if ((lookup_flags & LOOKUP_CREATE) && !is_readonly)
 822                         it->it_op |= IT_CREAT;
 823                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
 824                 it->it_flags = ll_namei_to_lookup_intent_flag(oit->flags &
 825                                                 ~(is_readonly ? O_CREAT : 0));
 826                 it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
 827         } else {
 828                 it->it_op = IT_GETATTR;
 829         }
 830
 831         return it;
 832 }
 833
 834 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 835                                    struct nameidata *nd)
 836 {
 837         struct dentry *de;
 838         ENTRY;
 839
 840         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 841                 struct lookup_intent *it;
 842
 843                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 844                         it = ll_d2d(dentry)->lld_it;
 845                         ll_d2d(dentry)->lld_it = NULL;
 846                 } else {
 847                         /*
 848                          * Optimize away (CREATE && !OPEN). Let .create handle
 849                          * the race. But only if we have write permissions
 850                          * there, otherwise we need to proceed with lookup.
 851                          * LU-4185
 852                          */
 853                         if ((nd->flags & LOOKUP_CREATE) &&
 854                             !(nd->flags & LOOKUP_OPEN) &&
 855                             (inode_permission(parent,
 856                                               MAY_WRITE | MAY_EXEC) == 0))
 857                                 RETURN(NULL);
 858
 859                         it = ll_convert_intent(&nd->intent.open, nd->flags,
 860                                 (nd->path.mnt->mnt_flags & MNT_READONLY) ||
 861                                 (nd->path.mnt->mnt_sb->s_flags & MS_RDONLY));
 862                         if (IS_ERR(it))
 863                                 RETURN((struct dentry *)it);
 864                 }
 865
 866                 de = ll_lookup_it(parent, dentry, it, NULL, NULL);
 867                 if (de)
 868                         dentry = de;
 869                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 870                         if (dentry->d_inode &&
 871                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 872                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 873                                         /* We cannot call open here as it might
 874                                          * deadlock. This case is unreachable in
 875                                          * practice because of
 876                                          * OBD_CONNECT_NODEVOH. */
 877                                 } else {
 878                                         struct file *filp;
 879
 880                                         nd->intent.open.file->private_data = it;
 881                                         filp = lookup_instantiate_filp(nd,
 882                                                                        dentry,
 883                                                                        NULL);
 884                                         if (IS_ERR(filp)) {
 885                                                 if (de)
 886                                                         dput(de);
 887                                                 de = (struct dentry *)filp;
 888                                         }
 889                                 }
 890                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 891                                 /* XXX This can only reliably work on assumption
 892                                  * that there are NO hashed negative dentries.*/
 893                                 ll_d2d(dentry)->lld_it = it;
 894                                 it = NULL; /* Will be freed in ll_create_nd */
 895                                 /* We absolutely depend on ll_create_nd to be
 896                                  * called to not leak this intent and possible
 897                                  * data attached to it */
 898                         }
 899                 }
 900
 901                 if (it) {
 902                         ll_intent_release(it);
 903                         OBD_FREE(it, sizeof(*it));
 904                 }
 905         } else {
 906                 de = ll_lookup_it(parent, dentry, NULL, NULL, NULL);
 907         }
 908
 909         RETURN(de);
 910 }
 911 #endif /* HAVE_IOP_ATOMIC_OPEN */
 912
 913 /* We depend on "mode" being set with the proper file type/umask by now */
 914 static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
 915 {
 916         struct inode *inode = NULL;
 917         struct ptlrpc_request *request = NULL;
 918         struct ll_sb_info *sbi = ll_i2sbi(dir);
 919         int rc;
 920         ENTRY;
 921
 922         LASSERT(it && it->it_disposition);
 923
 924         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 925         request = it->it_request;
 926         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 927         rc = ll_prep_inode(&inode, request, dir->i_sb, it);
 928         if (rc)
 929                 GOTO(out, inode = ERR_PTR(rc));
 930
 931         /* Pause to allow for a race with concurrent access by fid */
 932         OBD_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_NODE_PAUSE, cfs_fail_val);
 933
 934         /* We asked for a lock on the directory, but were granted a
 935          * lock on the inode.  Since we finally have an inode pointer,
 936          * stuff it in the lock. */
 937         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode "DFID"(%p)\n",
 938                PFID(ll_inode2fid(inode)), inode);
 939         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
 940         EXIT;
 941  out:
 942         ptlrpc_req_finished(request);
 943         return inode;
 944 }
 945
 946 /*
 947  * By the time this is called, we already have created the directory cache
 948  * entry for the new file, but it is so far negative - it has no inode.
 949  *
 950  * We defer creating the OBD object(s) until open, to keep the intent and
 951  * non-intent code paths similar, and also because we do not have the MDS
 952  * inode number before calling ll_create_node() (which is needed for LOV),
 953  * so we would need to do yet another RPC to the MDS to store the LOV EA
 954  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 955  * lmm_size in datalen (the MDS still has code which will handle that).
 956  *
 957  * If the create succeeds, we fill in the inode information
 958  * with d_instantiate().
 959  */
 960 static int ll_create_it(struct inode *dir, struct dentry *dentry,
 961                         struct lookup_intent *it,
 962                         void *secctx, __u32 secctxlen)
 963 {
 964         struct inode *inode;
 965         int rc = 0;
 966         ENTRY;
 967
 968         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
 969                dentry->d_name.len, dentry->d_name.name,
 970                PFID(ll_inode2fid(dir)), dir, LL_IT2STR(it));
 971
 972         rc = it_open_error(DISP_OPEN_CREATE, it);
 973         if (rc)
 974                 RETURN(rc);
 975
 976         inode = ll_create_node(dir, it);
 977         if (IS_ERR(inode))
 978                 RETURN(PTR_ERR(inode));
 979
 980         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX) &&
 981             secctx != NULL) {
 982                 inode_lock(inode);
 983                 /* must be done before d_instantiate, because it calls
 984                  * security_d_instantiate, which means a getxattr if security
 985                  * context is not set yet */
 986                 rc = security_inode_notifysecctx(inode, secctx, secctxlen);
 987                 inode_unlock(inode);
 988                 if (rc)
 989                         RETURN(rc);
 990         }
 991
 992         d_instantiate(dentry, inode);
 993
 994         if (!(ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX)) {
 995                 rc = ll_inode_init_security(dentry, inode, dir);
 996                 if (rc)
 997                         RETURN(rc);
 998         }
 999
1000         RETURN(0);
1001 }
1002
1003 void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
1004 {
1005         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
1006                                                        &RMF_MDT_BODY);
1007
1008         LASSERT(body);
1009         if (body->mbo_valid & OBD_MD_FLMTIME &&
1010             body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1011                 CDEBUG(D_INODE, "setting fid "DFID" mtime from %lu to %llu"
1012                        "\n", PFID(ll_inode2fid(inode)),
1013                        LTIME_S(inode->i_mtime), body->mbo_mtime);
1014                 LTIME_S(inode->i_mtime) = body->mbo_mtime;
1015         }
1016
1017         if (body->mbo_valid & OBD_MD_FLCTIME &&
1018             body->mbo_ctime > LTIME_S(inode->i_ctime))
1019                 LTIME_S(inode->i_ctime) = body->mbo_ctime;
1020 }
1021
1022 static int ll_new_node(struct inode *dir, struct dentry *dchild,
1023                        const char *tgt, umode_t mode, int rdev, __u32 opc)
1024 {
1025         struct qstr *name = &dchild->d_name;
1026         struct ptlrpc_request *request = NULL;
1027         struct md_op_data *op_data;
1028         struct inode *inode = NULL;
1029         struct ll_sb_info *sbi = ll_i2sbi(dir);
1030         int tgt_len = 0;
1031         int err;
1032
1033         ENTRY;
1034         if (unlikely(tgt != NULL))
1035                 tgt_len = strlen(tgt) + 1;
1036
1037 again:
1038         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1039                                      name->len, 0, opc, NULL);
1040         if (IS_ERR(op_data))
1041                 GOTO(err_exit, err = PTR_ERR(op_data));
1042
1043         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1044                 err = ll_dentry_init_security(dchild, mode, &dchild->d_name,
1045                                               &op_data->op_file_secctx_name,
1046                                               &op_data->op_file_secctx,
1047                                               &op_data->op_file_secctx_size);
1048                 if (err < 0)
1049                         GOTO(err_exit, err);
1050         }
1051
1052         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
1053                         from_kuid(&init_user_ns, current_fsuid()),
1054                         from_kgid(&init_user_ns, current_fsgid()),
1055                         cfs_curproc_cap_pack(), rdev, &request);
1056         if (err < 0 && err != -EREMOTE)
1057                 GOTO(err_exit, err);
1058
1059         /* If the client doesn't know where to create a subdirectory (or
1060          * in case of a race that sends the RPC to the wrong MDS), the
1061          * MDS will return -EREMOTE and the client will fetch the layout
1062          * of the directory, then create the directory on the right MDT. */
1063         if (unlikely(err == -EREMOTE)) {
1064                 struct ll_inode_info    *lli = ll_i2info(dir);
1065                 struct lmv_user_md      *lum;
1066                 int                     lumsize;
1067                 int                     err2;
1068
1069                 ptlrpc_req_finished(request);
1070                 request = NULL;
1071
1072                 err2 = ll_dir_getstripe(dir, (void **)&lum, &lumsize, &request,
1073                                         OBD_MD_DEFAULT_MEA);
1074                 if (err2 == 0) {
1075                         /* Update stripe_offset and retry */
1076                         lli->lli_def_stripe_offset = lum->lum_stripe_offset;
1077                 } else if (err2 == -ENODATA &&
1078                            lli->lli_def_stripe_offset != -1) {
1079                         /* If there are no default stripe EA on the MDT, but the
1080                          * client has default stripe, then it probably means
1081                          * default stripe EA has just been deleted. */
1082                         lli->lli_def_stripe_offset = -1;
1083                 } else {
1084                         GOTO(err_exit, err);
1085                 }
1086
1087                 ptlrpc_req_finished(request);
1088                 request = NULL;
1089                 ll_finish_md_op_data(op_data);
1090                 goto again;
1091         }
1092
1093         ll_update_times(request, dir);
1094
1095         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_NEWNODE_PAUSE, cfs_fail_val);
1096
1097         err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
1098         if (err)
1099                 GOTO(err_exit, err);
1100
1101         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1102                 inode_lock(inode);
1103                 /* must be done before d_instantiate, because it calls
1104                  * security_d_instantiate, which means a getxattr if security
1105                  * context is not set yet */
1106                 err = security_inode_notifysecctx(inode,
1107                                                   op_data->op_file_secctx,
1108                                                   op_data->op_file_secctx_size);
1109                 inode_unlock(inode);
1110                 if (err)
1111                         GOTO(err_exit, err);
1112         }
1113
1114         d_instantiate(dchild, inode);
1115
1116         if (!(sbi->ll_flags & LL_SBI_FILE_SECCTX)) {
1117                 err = ll_inode_init_security(dchild, inode, dir);
1118                 if (err)
1119                         GOTO(err_exit, err);
1120         }
1121
1122         EXIT;
1123 err_exit:
1124         if (request != NULL)
1125                 ptlrpc_req_finished(request);
1126
1127         if (!IS_ERR_OR_NULL(op_data))
1128                 ll_finish_md_op_data(op_data);
1129
1130         return err;
1131 }
1132
1133 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1134                     dev_t rdev)
1135 {
1136         struct qstr *name = &dchild->d_name;
1137         int err;
1138         ENTRY;
1139
1140         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p) mode %o dev %x\n",
1141                name->len, name->name, PFID(ll_inode2fid(dir)), dir,
1142                mode, rdev);
1143
1144         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1145                 mode &= ~current_umask();
1146
1147         switch (mode & S_IFMT) {
1148         case 0:
1149                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
1150         case S_IFREG:
1151         case S_IFCHR:
1152         case S_IFBLK:
1153         case S_IFIFO:
1154         case S_IFSOCK:
1155                 err = ll_new_node(dir, dchild, NULL, mode, old_encode_dev(rdev),
1156                                   LUSTRE_OPC_MKNOD);
1157                 break;
1158         case S_IFDIR:
1159                 err = -EPERM;
1160                 break;
1161         default:
1162                 err = -EINVAL;
1163         }
1164
1165         if (!err)
1166                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
1167
1168         RETURN(err);
1169 }
1170
1171 #ifdef HAVE_IOP_ATOMIC_OPEN
1172 /*
1173  * Plain create. Intent create is handled in atomic_open.
1174  */
1175 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1176                         umode_t mode, bool want_excl)
1177 {
1178         int rc;
1179
1180         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1181
1182         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), "
1183                            "flags=%u, excl=%d\n", dentry->d_name.len,
1184                dentry->d_name.name, PFID(ll_inode2fid(dir)),
1185                dir, mode, want_excl);
1186
1187         /* Using mknod(2) to create a regular file is designed to not recognize
1188          * volatile file name, so we use ll_mknod() here. */
1189         rc = ll_mknod(dir, dentry, mode, 0);
1190
1191         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1192
1193         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
1194                dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
1195
1196         return rc;
1197 }
1198 #else /* !HAVE_IOP_ATOMIC_OPEN */
1199 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1200                         ll_umode_t mode, struct nameidata *nd)
1201 {
1202         struct ll_dentry_data *lld = ll_d2d(dentry);
1203         struct lookup_intent *it = NULL;
1204         int rc;
1205
1206         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1207
1208         if (lld != NULL)
1209                 it = lld->lld_it;
1210
1211         if (!it) {
1212                 /* LU-8559: use LUSTRE_OPC_CREATE for non atomic open case
1213                  * so that volatile file name is recoginized.
1214                  * Mknod(2), however, is designed to not recognize volatile
1215                  * file name to avoid inode leak under orphan directory until
1216                  * MDT reboot */
1217                 return ll_new_node(dir, dentry, NULL, mode, 0,
1218                                    LUSTRE_OPC_CREATE);
1219         }
1220
1221         lld->lld_it = NULL;
1222
1223         /* Was there an error? Propagate it! */
1224         if (it->it_status) {
1225                 rc = it->it_status;
1226                 goto out;
1227         }
1228
1229         rc = ll_create_it(dir, dentry, it, NULL, 0);
1230         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
1231                 struct file *filp;
1232
1233                 nd->intent.open.file->private_data = it;
1234                 filp = lookup_instantiate_filp(nd, dentry, NULL);
1235                 if (IS_ERR(filp))
1236                         rc = PTR_ERR(filp);
1237         }
1238
1239 out:
1240         ll_intent_release(it);
1241         OBD_FREE(it, sizeof(*it));
1242
1243         if (!rc)
1244                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1245
1246         return rc;
1247 }
1248 #endif /* HAVE_IOP_ATOMIC_OPEN */
1249
1250 static int ll_symlink(struct inode *dir, struct dentry *dchild,
1251                       const char *oldpath)
1252 {
1253         struct qstr *name = &dchild->d_name;
1254         int err;
1255         ENTRY;
1256
1257         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), target=%.*s\n",
1258                name->len, name->name, PFID(ll_inode2fid(dir)),
1259                dir, 3000, oldpath);
1260
1261         err = ll_new_node(dir, dchild, oldpath, S_IFLNK | S_IRWXUGO, 0,
1262                           LUSTRE_OPC_SYMLINK);
1263
1264         if (!err)
1265                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
1266
1267         RETURN(err);
1268 }
1269
1270 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1271                    struct dentry *new_dentry)
1272 {
1273         struct inode *src = old_dentry->d_inode;
1274         struct qstr *name = &new_dentry->d_name;
1275         struct ll_sb_info *sbi = ll_i2sbi(dir);
1276         struct ptlrpc_request *request = NULL;
1277         struct md_op_data *op_data;
1278         int err;
1279
1280         ENTRY;
1281         CDEBUG(D_VFSTRACE, "VFS Op: inode="DFID"(%p), dir="DFID"(%p), "
1282                "target=%.*s\n", PFID(ll_inode2fid(src)), src,
1283                PFID(ll_inode2fid(dir)), dir, name->len, name->name);
1284
1285         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1286                                      0, LUSTRE_OPC_ANY, NULL);
1287         if (IS_ERR(op_data))
1288                 RETURN(PTR_ERR(op_data));
1289
1290         err = md_link(sbi->ll_md_exp, op_data, &request);
1291         ll_finish_md_op_data(op_data);
1292         if (err)
1293                 GOTO(out, err);
1294
1295         ll_update_times(request, dir);
1296         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
1297         EXIT;
1298 out:
1299         ptlrpc_req_finished(request);
1300         RETURN(err);
1301 }
1302
1303 static int ll_mkdir(struct inode *dir, struct dentry *dchild, ll_umode_t mode)
1304 {
1305         struct qstr *name = &dchild->d_name;
1306         int err;
1307         ENTRY;
1308
1309         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1310                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1311
1312         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1313                 mode &= ~current_umask();
1314
1315         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1316
1317         err = ll_new_node(dir, dchild, NULL, mode, 0, LUSTRE_OPC_MKDIR);
1318         if (err == 0)
1319                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
1320
1321         RETURN(err);
1322 }
1323
1324 static int ll_rmdir(struct inode *dir, struct dentry *dchild)
1325 {
1326         struct qstr *name = &dchild->d_name;
1327         struct ptlrpc_request *request = NULL;
1328         struct md_op_data *op_data;
1329         int rc;
1330         ENTRY;
1331
1332         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1333                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1334
1335         if (unlikely(d_mountpoint(dchild)))
1336                 RETURN(-EBUSY);
1337
1338         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1339                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1340         if (IS_ERR(op_data))
1341                 RETURN(PTR_ERR(op_data));
1342
1343         if (dchild->d_inode != NULL)
1344                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1345
1346         op_data->op_fid2 = op_data->op_fid3;
1347         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1348         ll_finish_md_op_data(op_data);
1349         if (rc == 0) {
1350                 ll_update_times(request, dir);
1351                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1352         }
1353
1354         ptlrpc_req_finished(request);
1355         RETURN(rc);
1356 }
1357
1358 /**
1359  * Remove dir entry
1360  **/
1361 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1362 {
1363         struct ptlrpc_request *request = NULL;
1364         struct md_op_data *op_data;
1365         int rc;
1366         ENTRY;
1367
1368         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1369                namelen, name, PFID(ll_inode2fid(dir)), dir);
1370
1371         op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1372                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1373         if (IS_ERR(op_data))
1374                 RETURN(PTR_ERR(op_data));
1375         op_data->op_cli_flags |= CLI_RM_ENTRY;
1376         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1377         ll_finish_md_op_data(op_data);
1378         if (rc == 0) {
1379                 ll_update_times(request, dir);
1380                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1381         }
1382
1383         ptlrpc_req_finished(request);
1384         RETURN(rc);
1385 }
1386
1387 static int ll_unlink(struct inode *dir, struct dentry *dchild)
1388 {
1389         struct qstr *name = &dchild->d_name;
1390         struct ptlrpc_request *request = NULL;
1391         struct md_op_data *op_data;
1392         int rc;
1393         ENTRY;
1394         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1395                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1396
1397         /*
1398          * XXX: unlink bind mountpoint maybe call to here,
1399          * just check it as vfs_unlink does.
1400          */
1401         if (unlikely(d_mountpoint(dchild)))
1402                 RETURN(-EBUSY);
1403
1404         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len, 0,
1405                                      LUSTRE_OPC_ANY, NULL);
1406         if (IS_ERR(op_data))
1407                 RETURN(PTR_ERR(op_data));
1408
1409         if (dchild->d_inode != NULL)
1410                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1411
1412         op_data->op_fid2 = op_data->op_fid3;
1413         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1414         ll_finish_md_op_data(op_data);
1415         if (rc)
1416                 GOTO(out, rc);
1417
1418         ll_update_times(request, dir);
1419         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1420
1421  out:
1422         ptlrpc_req_finished(request);
1423         RETURN(rc);
1424 }
1425
1426 static int ll_rename(struct inode *src, struct dentry *src_dchild,
1427                      struct inode *tgt, struct dentry *tgt_dchild
1428 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
1429                      , unsigned int flags
1430 #endif
1431                      )
1432 {
1433         struct qstr *src_name = &src_dchild->d_name;
1434         struct qstr *tgt_name = &tgt_dchild->d_name;
1435         struct ptlrpc_request *request = NULL;
1436         struct ll_sb_info *sbi = ll_i2sbi(src);
1437         struct md_op_data *op_data;
1438         int err;
1439         ENTRY;
1440
1441 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
1442         if (flags)
1443                 return -EINVAL;
1444 #endif
1445
1446         CDEBUG(D_VFSTRACE, "VFS Op:oldname=%.*s, src_dir="DFID
1447                "(%p), newname=%.*s, tgt_dir="DFID"(%p)\n",
1448                src_name->len, src_name->name,
1449                PFID(ll_inode2fid(src)), src, tgt_name->len,
1450                tgt_name->name, PFID(ll_inode2fid(tgt)), tgt);
1451
1452         if (unlikely(d_mountpoint(src_dchild) || d_mountpoint(tgt_dchild)))
1453                 RETURN(-EBUSY);
1454
1455         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1456                                      LUSTRE_OPC_ANY, NULL);
1457         if (IS_ERR(op_data))
1458                 RETURN(PTR_ERR(op_data));
1459
1460         if (src_dchild->d_inode != NULL)
1461                 op_data->op_fid3 = *ll_inode2fid(src_dchild->d_inode);
1462
1463         if (tgt_dchild->d_inode != NULL)
1464                 op_data->op_fid4 = *ll_inode2fid(tgt_dchild->d_inode);
1465
1466         err = md_rename(sbi->ll_md_exp, op_data,
1467                         src_name->name, src_name->len,
1468                         tgt_name->name, tgt_name->len, &request);
1469         ll_finish_md_op_data(op_data);
1470         if (!err) {
1471                 ll_update_times(request, src);
1472                 ll_update_times(request, tgt);
1473                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1474         }
1475
1476         ptlrpc_req_finished(request);
1477
1478         if (err == 0)
1479                 d_move(src_dchild, tgt_dchild);
1480
1481         RETURN(err);
1482 }
1483
1484 const struct inode_operations ll_dir_inode_operations = {
1485         .mknod          = ll_mknod,
1486 #ifdef HAVE_IOP_ATOMIC_OPEN
1487         .atomic_open    = ll_atomic_open,
1488 #endif
1489         .lookup         = ll_lookup_nd,
1490         .create         = ll_create_nd,
1491         /* We need all these non-raw things for NFSD, to not patch it. */
1492         .unlink         = ll_unlink,
1493         .mkdir          = ll_mkdir,
1494         .rmdir          = ll_rmdir,
1495         .symlink        = ll_symlink,
1496         .link           = ll_link,
1497         .rename         = ll_rename,
1498         .setattr        = ll_setattr,
1499         .getattr        = ll_getattr,
1500         .permission     = ll_inode_permission,
1501 #ifdef HAVE_IOP_XATTR
1502         .setxattr       = ll_setxattr,
1503         .getxattr       = ll_getxattr,
1504         .removexattr    = ll_removexattr,
1505 #endif
1506         .listxattr      = ll_listxattr,
1507 #ifdef HAVE_IOP_GET_ACL
1508         .get_acl        = ll_get_acl,
1509 #endif
1510 #ifdef HAVE_IOP_SET_ACL
1511         .set_acl        = ll_set_acl,
1512 #endif
1513 };
1514
1515 const struct inode_operations ll_special_inode_operations = {
1516         .setattr        = ll_setattr,
1517         .getattr        = ll_getattr,
1518         .permission     = ll_inode_permission,
1519 #ifdef HAVE_IOP_XATTR
1520         .setxattr       = ll_setxattr,
1521         .getxattr       = ll_getxattr,
1522         .removexattr    = ll_removexattr,
1523 #endif
1524         .listxattr      = ll_listxattr,
1525 #ifdef HAVE_IOP_GET_ACL
1526         .get_acl        = ll_get_acl,
1527 #endif
1528 #ifdef HAVE_IOP_SET_ACL
1529         .set_acl        = ll_set_acl,
1530 #endif
1531 };