lustre/llite/namei.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2014, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #include <linux/fs.h>
  38 #include <linux/sched.h>
  39 #include <linux/mm.h>
  40 #include <linux/quotaops.h>
  41 #include <linux/highmem.h>
  42 #include <linux/pagemap.h>
  43 #include <linux/security.h>
  44 #include <linux/user_namespace.h>
  45 #ifdef HAVE_UIDGID_HEADER
  46 # include <linux/uidgid.h>
  47 #endif
  48
  49 #define DEBUG_SUBSYSTEM S_LLITE
  50
  51 #include <obd_support.h>
  52 #include <lustre_fid.h>
  53 #include <lustre_dlm.h>
  54 #include <lustre_ver.h>
  55 #include "llite_internal.h"
  56
  57 static int ll_create_it(struct inode *dir, struct dentry *dentry,
  58                         struct lookup_intent *it);
  59
  60 /* called from iget5_locked->find_inode() under inode_lock spinlock */
  61 static int ll_test_inode(struct inode *inode, void *opaque)
  62 {
  63         struct ll_inode_info    *lli = ll_i2info(inode);
  64         struct lustre_md        *md = opaque;
  65
  66         if (unlikely(!(md->body->mbo_valid & OBD_MD_FLID))) {
  67                 CERROR("MDS body missing FID\n");
  68                 return 0;
  69         }
  70
  71         if (!lu_fid_eq(&lli->lli_fid, &md->body->mbo_fid1))
  72                 return 0;
  73
  74         return 1;
  75 }
  76
  77 static int ll_set_inode(struct inode *inode, void *opaque)
  78 {
  79         struct ll_inode_info *lli = ll_i2info(inode);
  80         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
  81
  82         if (unlikely(!(body->mbo_valid & OBD_MD_FLID))) {
  83                 CERROR("MDS body missing FID\n");
  84                 return -EINVAL;
  85         }
  86
  87         lli->lli_fid = body->mbo_fid1;
  88         if (unlikely(!(body->mbo_valid & OBD_MD_FLTYPE))) {
  89                 CERROR("Can not initialize inode "DFID" without object type: "
  90                        "valid = "LPX64"\n",
  91                        PFID(&lli->lli_fid), body->mbo_valid);
  92                 return -EINVAL;
  93         }
  94
  95         inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mbo_mode & S_IFMT);
  96         if (unlikely(inode->i_mode == 0)) {
  97                 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
  98                 return -EINVAL;
  99         }
 100
 101         ll_lli_init(lli);
 102
 103         return 0;
 104 }
 105
 106
 107 /**
 108  * Get an inode by inode number(@hash), which is already instantiated by
 109  * the intent lookup).
 110  */
 111 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 112                       struct lustre_md *md)
 113 {
 114         struct inode    *inode;
 115         int             rc = 0;
 116
 117         ENTRY;
 118
 119         LASSERT(hash != 0);
 120         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
 121         if (inode == NULL)
 122                 RETURN(ERR_PTR(-ENOMEM));
 123
 124         if (inode->i_state & I_NEW) {
 125                 rc = ll_read_inode2(inode, md);
 126                 if (rc == 0 && S_ISREG(inode->i_mode) &&
 127                     ll_i2info(inode)->lli_clob == NULL) {
 128                         CDEBUG(D_INODE, "%s: apply lsm %p to inode "DFID"\n",
 129                                 ll_get_fsname(sb, NULL, 0), md->lsm,
 130                                 PFID(ll_inode2fid(inode)));
 131                         rc = cl_file_inode_init(inode, md);
 132                 }
 133                 if (rc != 0) {
 134                         make_bad_inode(inode);
 135                         unlock_new_inode(inode);
 136                         iput(inode);
 137                         inode = ERR_PTR(rc);
 138                 } else {
 139                         unlock_new_inode(inode);
 140                 }
 141         } else if (!(inode->i_state & (I_FREEING | I_CLEAR))) {
 142                 rc = ll_update_inode(inode, md);
 143                 CDEBUG(D_VFSTRACE, "got inode: "DFID"(%p): rc = %d\n",
 144                        PFID(&md->body->mbo_fid1), inode, rc);
 145                 if (rc != 0) {
 146                         iput(inode);
 147                         inode = ERR_PTR(rc);
 148                 }
 149         }
 150
 151         RETURN(inode);
 152 }
 153
 154 static void ll_invalidate_negative_children(struct inode *dir)
 155 {
 156         struct dentry *dentry, *tmp_subdir;
 157         DECLARE_LL_D_HLIST_NODE_PTR(p);
 158
 159         ll_lock_dcache(dir);
 160         ll_d_hlist_for_each_entry(dentry, p, &dir->i_dentry, d_alias) {
 161                 spin_lock(&dentry->d_lock);
 162                 if (!list_empty(&dentry->d_subdirs)) {
 163                         struct dentry *child;
 164
 165                         list_for_each_entry_safe(child, tmp_subdir,
 166                                                  &dentry->d_subdirs,
 167                                                  d_u.d_child) {
 168                                 if (child->d_inode == NULL)
 169                                         d_lustre_invalidate(child, 1);
 170                         }
 171                 }
 172                 spin_unlock(&dentry->d_lock);
 173         }
 174         ll_unlock_dcache(dir);
 175 }
 176
 177 int ll_test_inode_by_fid(struct inode *inode, void *opaque)
 178 {
 179         return lu_fid_eq(&ll_i2info(inode)->lli_fid, opaque);
 180 }
 181
 182 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 183                        void *data, int flag)
 184 {
 185         struct lustre_handle lockh;
 186         int rc;
 187         ENTRY;
 188
 189         switch (flag) {
 190         case LDLM_CB_BLOCKING:
 191                 ldlm_lock2handle(lock, &lockh);
 192                 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
 193                 if (rc < 0) {
 194                         CDEBUG(D_INODE, "ldlm_cli_cancel: rc = %d\n", rc);
 195                         RETURN(rc);
 196                 }
 197                 break;
 198         case LDLM_CB_CANCELING: {
 199                 struct inode *inode = ll_inode_from_resource_lock(lock);
 200                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 201
 202                 /* Inode is set to lock->l_resource->lr_lvb_inode
 203                  * for mdc - bug 24555 */
 204                 LASSERT(lock->l_ast_data == NULL);
 205
 206                 if (inode == NULL)
 207                         break;
 208
 209                 /* Invalidate all dentries associated with this inode */
 210                 LASSERT(ldlm_is_canceling(lock));
 211
 212                 if (!fid_res_name_eq(ll_inode2fid(inode),
 213                                      &lock->l_resource->lr_name)) {
 214                         LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
 215                                    PFID(ll_inode2fid(inode)), inode);
 216                         LBUG();
 217                 }
 218
 219                 if (bits & MDS_INODELOCK_XATTR) {
 220                         if (S_ISDIR(inode->i_mode))
 221                                 ll_i2info(inode)->lli_def_stripe_offset = -1;
 222                         ll_xattr_cache_destroy(inode);
 223                         bits &= ~MDS_INODELOCK_XATTR;
 224                 }
 225
 226                 /* For OPEN locks we differentiate between lock modes
 227                  * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
 228                 if (bits & MDS_INODELOCK_OPEN)
 229                         ll_have_md_lock(inode, &bits, lock->l_req_mode);
 230
 231                 if (bits & MDS_INODELOCK_OPEN) {
 232                         fmode_t fmode;
 233
 234                         switch (lock->l_req_mode) {
 235                         case LCK_CW:
 236                                 fmode = FMODE_WRITE;
 237                                 break;
 238                         case LCK_PR:
 239                                 fmode = FMODE_EXEC;
 240                                 break;
 241                         case LCK_CR:
 242                                 fmode = FMODE_READ;
 243                                 break;
 244                         default:
 245                                 LDLM_ERROR(lock, "bad lock mode for OPEN lock");
 246                                 LBUG();
 247                         }
 248
 249                         ll_md_real_close(inode, fmode);
 250
 251                         bits &= ~MDS_INODELOCK_OPEN;
 252                 }
 253
 254                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
 255                             MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM))
 256                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
 257
 258                 if (bits & MDS_INODELOCK_LAYOUT) {
 259                         struct cl_object_conf conf = {
 260                                 .coc_opc = OBJECT_CONF_INVALIDATE,
 261                                 .coc_inode = inode,
 262                         };
 263
 264                         rc = ll_layout_conf(inode, &conf);
 265                         if (rc < 0)
 266                                 CDEBUG(D_INODE, "cannot invalidate layout of "
 267                                        DFID": rc = %d\n",
 268                                        PFID(ll_inode2fid(inode)), rc);
 269                 }
 270
 271                 if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
 272                         struct ll_inode_info *lli = ll_i2info(inode);
 273
 274                         CDEBUG(D_INODE, "invalidating inode "DFID" lli = %p, "
 275                                "pfid  = "DFID"\n", PFID(ll_inode2fid(inode)),
 276                                lli, PFID(&lli->lli_pfid));
 277                         truncate_inode_pages(inode->i_mapping, 0);
 278
 279                         if (unlikely(!fid_is_zero(&lli->lli_pfid))) {
 280                                 struct inode *master_inode = NULL;
 281                                 unsigned long hash;
 282
 283                                 /* This is slave inode, since all of the child
 284                                  * dentry is connected on the master inode, so
 285                                  * we have to invalidate the negative children
 286                                  * on master inode */
 287                                 CDEBUG(D_INODE, "Invalidate s"DFID" m"DFID"\n",
 288                                        PFID(ll_inode2fid(inode)),
 289                                        PFID(&lli->lli_pfid));
 290
 291                                 hash = cl_fid_build_ino(&lli->lli_pfid,
 292                                         ll_need_32bit_api(ll_i2sbi(inode)));
 293
 294                                 master_inode = ilookup5(inode->i_sb, hash,
 295                                                         ll_test_inode_by_fid,
 296                                                         (void *)&lli->lli_pfid);
 297                                 if (master_inode != NULL &&
 298                                         !IS_ERR(master_inode)) {
 299                                         ll_invalidate_negative_children(
 300                                                                 master_inode);
 301                                         iput(master_inode);
 302                                 }
 303                         } else {
 304                                 ll_invalidate_negative_children(inode);
 305                         }
 306                 }
 307
 308                 if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
 309                     inode->i_sb->s_root != NULL &&
 310                     inode != inode->i_sb->s_root->d_inode)
 311                         ll_invalidate_aliases(inode);
 312
 313                 iput(inode);
 314                 break;
 315         }
 316         default:
 317                 LBUG();
 318         }
 319
 320         RETURN(0);
 321 }
 322
 323 __u32 ll_i2suppgid(struct inode *i)
 324 {
 325         if (in_group_p(i->i_gid))
 326                 return (__u32)from_kgid(&init_user_ns, i->i_gid);
 327         else
 328                 return (__u32) __kgid_val(INVALID_GID);
 329 }
 330
 331 /* Pack the required supplementary groups into the supplied groups array.
 332  * If we don't need to use the groups from the target inode(s) then we
 333  * instead pack one or more groups from the user's supplementary group
 334  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 335 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 336 {
 337         LASSERT(i1 != NULL);
 338         LASSERT(suppgids != NULL);
 339
 340         suppgids[0] = ll_i2suppgid(i1);
 341
 342         if (i2)
 343                 suppgids[1] = ll_i2suppgid(i2);
 344         else
 345                 suppgids[1] = -1;
 346 }
 347
 348 /*
 349  * try to reuse three types of dentry:
 350  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
 351  *    by concurrent .revalidate).
 352  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
 353  *    be cleared by others calling d_lustre_revalidate).
 354  * 3. DISCONNECTED alias.
 355  */
 356 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
 357 {
 358         struct dentry *alias, *discon_alias, *invalid_alias;
 359         DECLARE_LL_D_HLIST_NODE_PTR(p);
 360
 361         if (ll_d_hlist_empty(&inode->i_dentry))
 362                 return NULL;
 363
 364         discon_alias = invalid_alias = NULL;
 365
 366         ll_lock_dcache(inode);
 367         ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
 368                 LASSERT(alias != dentry);
 369
 370                 spin_lock(&alias->d_lock);
 371                 if (alias->d_flags & DCACHE_DISCONNECTED)
 372                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
 373                         discon_alias = alias;
 374                 else if (alias->d_parent == dentry->d_parent             &&
 375                          alias->d_name.hash == dentry->d_name.hash       &&
 376                          alias->d_name.len == dentry->d_name.len         &&
 377                          memcmp(alias->d_name.name, dentry->d_name.name,
 378                                 dentry->d_name.len) == 0)
 379                         invalid_alias = alias;
 380                 spin_unlock(&alias->d_lock);
 381
 382                 if (invalid_alias)
 383                         break;
 384         }
 385         alias = invalid_alias ?: discon_alias ?: NULL;
 386         if (alias) {
 387                 spin_lock(&alias->d_lock);
 388                 dget_dlock(alias);
 389                 spin_unlock(&alias->d_lock);
 390         }
 391         ll_unlock_dcache(inode);
 392
 393         return alias;
 394 }
 395
 396 /*
 397  * Similar to d_splice_alias(), but lustre treats invalid alias
 398  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
 399  */
 400 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
 401 {
 402         struct dentry *new;
 403         int rc;
 404
 405         if (inode) {
 406                 new = ll_find_alias(inode, de);
 407                 if (new) {
 408                         rc = ll_d_init(new);
 409                         if (rc < 0) {
 410                                 dput(new);
 411                                 return ERR_PTR(rc);
 412                         }
 413                         d_move(new, de);
 414                         iput(inode);
 415                         CDEBUG(D_DENTRY,
 416                                "Reuse dentry %p inode %p refc %d flags %#x\n",
 417                               new, new->d_inode, ll_d_count(new), new->d_flags);
 418                         return new;
 419                 }
 420         }
 421         rc = ll_d_init(de);
 422         if (rc < 0)
 423                 return ERR_PTR(rc);
 424         d_add(de, inode);
 425         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
 426                de, de->d_inode, ll_d_count(de), de->d_flags);
 427         return de;
 428 }
 429
 430 static int ll_lookup_it_finish(struct ptlrpc_request *request,
 431                                struct lookup_intent *it,
 432                                struct inode *parent, struct dentry **de)
 433 {
 434         struct inode             *inode = NULL;
 435         __u64                     bits = 0;
 436         int                       rc;
 437         ENTRY;
 438
 439         /* NB 1 request reference will be taken away by ll_intent_lock()
 440          * when I return */
 441         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
 442                it->d.lustre.it_disposition);
 443         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 444                 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
 445                 if (rc)
 446                         RETURN(rc);
 447
 448                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
 449
 450                 /* We used to query real size from OSTs here, but actually
 451                    this is not needed. For stat() calls size would be updated
 452                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 453                    2.4 and
 454                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 455                    Everybody else who needs correct file size would call
 456                    ll_glimpse_size or some equivalent themselves anyway.
 457                    Also see bug 7198. */
 458         }
 459
 460         /* Only hash *de if it is unhashed (new dentry).
 461          * Atoimc_open may passin hashed dentries for open.
 462          */
 463         if (d_unhashed(*de)) {
 464                 struct dentry *alias;
 465
 466                 alias = ll_splice_alias(inode, *de);
 467                 if (IS_ERR(alias))
 468                         GOTO(out, rc = PTR_ERR(alias));
 469
 470                 *de = alias;
 471         } else if (!it_disposition(it, DISP_LOOKUP_NEG)  &&
 472                    !it_disposition(it, DISP_OPEN_CREATE)) {
 473                 /* With DISP_OPEN_CREATE dentry will
 474                    instantiated in ll_create_it. */
 475                 LASSERT((*de)->d_inode == NULL);
 476                 d_instantiate(*de, inode);
 477         }
 478
 479         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 480                 /* we have lookup look - unhide dentry */
 481                 if (bits & MDS_INODELOCK_LOOKUP)
 482                         d_lustre_revalidate(*de);
 483         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
 484                 /* If file created on server, don't depend on parent UPDATE
 485                  * lock to unhide it. It is left hidden and next lookup can
 486                  * find it in ll_splice_alias.
 487                  */
 488                 /* Check that parent has UPDATE lock. */
 489                 struct lookup_intent parent_it = {
 490                                         .it_op = IT_GETATTR,
 491                                         .d.lustre.it_lock_handle = 0 };
 492                 struct lu_fid   fid = ll_i2info(parent)->lli_fid;
 493
 494                 /* If it is striped directory, get the real stripe parent */
 495                 if (unlikely(ll_i2info(parent)->lli_lsm_md != NULL)) {
 496                         rc = md_get_fid_from_lsm(ll_i2mdexp(parent),
 497                                                  ll_i2info(parent)->lli_lsm_md,
 498                                                  (*de)->d_name.name,
 499                                                  (*de)->d_name.len, &fid);
 500                         if (rc != 0)
 501                                 GOTO(out, rc);
 502                 }
 503
 504                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it, &fid,
 505                                        NULL)) {
 506                         d_lustre_revalidate(*de);
 507                         ll_intent_release(&parent_it);
 508                 }
 509         }
 510
 511         GOTO(out, rc = 0);
 512
 513 out:
 514         if (rc != 0 && it->it_op & IT_OPEN)
 515                 ll_open_cleanup((*de)->d_sb, request);
 516
 517         return rc;
 518 }
 519
 520 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 521                                    struct lookup_intent *it)
 522 {
 523         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 524         struct dentry *save = dentry, *retval;
 525         struct ptlrpc_request *req = NULL;
 526         struct md_op_data *op_data = NULL;
 527         __u32 opc;
 528         int rc;
 529         ENTRY;
 530
 531         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 532                 RETURN(ERR_PTR(-ENAMETOOLONG));
 533
 534         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
 535                dentry->d_name.len, dentry->d_name.name,
 536                PFID(ll_inode2fid(parent)), parent, LL_IT2STR(it));
 537
 538         if (d_mountpoint(dentry))
 539                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 540
 541         if (it == NULL || it->it_op == IT_GETXATTR)
 542                 it = &lookup_it;
 543
 544         if (it->it_op == IT_GETATTR && dentry_may_statahead(parent, dentry)) {
 545                 rc = ll_statahead(parent, &dentry, 0);
 546                 if (rc == 1)
 547                         RETURN(dentry == save ? NULL : dentry);
 548         }
 549
 550         if (it->it_op & IT_CREAT)
 551                 opc = LUSTRE_OPC_CREATE;
 552         else
 553                 opc = LUSTRE_OPC_ANY;
 554
 555         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 556                                      dentry->d_name.len, 0, opc, NULL);
 557         if (IS_ERR(op_data))
 558                 RETURN((void *)op_data);
 559
 560         /* enforce umask if acl disabled or MDS doesn't support umask */
 561         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 562                 it->it_create_mode &= ~current_umask();
 563
 564         rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
 565                             &ll_md_blocking_ast, 0);
 566         /* If the MDS allows the client to chgrp (CFS_SETGRP_PERM), but the
 567          * client does not know which suppgid should be sent to the MDS, or
 568          * some other(s) changed the target file's GID after this RPC sent
 569          * to the MDS with the suppgid as the original GID, then we should
 570          * try again with right suppgid. */
 571         if (rc == -EACCES && it->it_op & IT_OPEN &&
 572             it_disposition(it, DISP_OPEN_DENY)) {
 573                 struct mdt_body *body;
 574
 575                 LASSERT(req != NULL);
 576
 577                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 578                 if (op_data->op_suppgids[0] == body->mbo_gid ||
 579                     op_data->op_suppgids[1] == body->mbo_gid ||
 580                     !in_group_p(make_kgid(&init_user_ns, body->mbo_gid)))
 581                         GOTO(out, retval = ERR_PTR(-EACCES));
 582
 583                 fid_zero(&op_data->op_fid2);
 584                 op_data->op_suppgids[1] = body->mbo_gid;
 585                 ptlrpc_req_finished(req);
 586                 req = NULL;
 587                 ll_intent_release(it);
 588                 rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
 589                                     &ll_md_blocking_ast, 0);
 590         }
 591
 592         if (rc < 0)
 593                 GOTO(out, retval = ERR_PTR(rc));
 594
 595         rc = ll_lookup_it_finish(req, it, parent, &dentry);
 596         if (rc != 0) {
 597                 ll_intent_release(it);
 598                 GOTO(out, retval = ERR_PTR(rc));
 599         }
 600
 601         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 602             !S_ISREG(dentry->d_inode->i_mode) &&
 603             !S_ISDIR(dentry->d_inode->i_mode)) {
 604                 ll_release_openhandle(dentry, it);
 605         }
 606         ll_lookup_finish_locks(it, dentry);
 607
 608         GOTO(out, retval = (dentry == save) ? NULL : dentry);
 609
 610 out:
 611         if (op_data != NULL && !IS_ERR(op_data))
 612                 ll_finish_md_op_data(op_data);
 613
 614         ptlrpc_req_finished(req);
 615         return retval;
 616 }
 617
 618 #ifdef HAVE_IOP_ATOMIC_OPEN
 619 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 620                                    unsigned int flags)
 621 {
 622         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
 623         struct dentry *de;
 624
 625         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), flags=%u\n",
 626                dentry->d_name.len, dentry->d_name.name,
 627                PFID(ll_inode2fid(parent)), parent, flags);
 628
 629         /* Optimize away (CREATE && !OPEN). Let .create handle the race. */
 630         if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN))
 631                 return NULL;
 632
 633         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
 634                 itp = NULL;
 635         else
 636                 itp = &it;
 637         de = ll_lookup_it(parent, dentry, itp);
 638
 639         if (itp != NULL)
 640                 ll_intent_release(itp);
 641
 642         return de;
 643 }
 644
 645 /*
 646  * For cached negative dentry and new dentry, handle lookup/create/open
 647  * together.
 648  */
 649 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
 650                           struct file *file, unsigned open_flags,
 651                           umode_t mode, int *opened)
 652 {
 653         struct lookup_intent *it;
 654         struct dentry *de;
 655         long long lookup_flags = LOOKUP_OPEN;
 656         int rc = 0;
 657         ENTRY;
 658
 659         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), file %p,"
 660                            "open_flags %x, mode %x opened %d\n",
 661                dentry->d_name.len, dentry->d_name.name,
 662                PFID(ll_inode2fid(dir)), dir, file, open_flags, mode, *opened);
 663
 664         OBD_ALLOC(it, sizeof(*it));
 665         if (!it)
 666                 RETURN(-ENOMEM);
 667
 668         it->it_op = IT_OPEN;
 669         if (open_flags & O_CREAT) {
 670                 it->it_op |= IT_CREAT;
 671                 lookup_flags |= LOOKUP_CREATE;
 672         }
 673         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
 674         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
 675         it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
 676
 677         /* Dentry added to dcache tree in ll_lookup_it */
 678         de = ll_lookup_it(dir, dentry, it);
 679         if (IS_ERR(de))
 680                 rc = PTR_ERR(de);
 681         else if (de != NULL)
 682                 dentry = de;
 683
 684         if (!rc) {
 685                 if (it_disposition(it, DISP_OPEN_CREATE)) {
 686                         /* Dentry instantiated in ll_create_it. */
 687                         rc = ll_create_it(dir, dentry, it);
 688                         if (rc) {
 689                                 /* We dget in ll_splice_alias. */
 690                                 if (de != NULL)
 691                                         dput(de);
 692                                 goto out_release;
 693                         }
 694
 695                         *opened |= FILE_CREATED;
 696                 }
 697                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
 698                         /* Open dentry. */
 699                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
 700                                 /* We cannot call open here as it would
 701                                  * deadlock.
 702                                  */
 703                                 if (it_disposition(it, DISP_ENQ_OPEN_REF))
 704                                         ptlrpc_req_finished(
 705                                                        (struct ptlrpc_request *)
 706                                                           it->d.lustre.it_data);
 707                                 rc = finish_no_open(file, de);
 708                         } else {
 709                                 file->private_data = it;
 710                                 rc = finish_open(file, dentry, NULL, opened);
 711                                 /* We dget in ll_splice_alias. finish_open takes
 712                                  * care of dget for fd open.
 713                                  */
 714                                 if (de != NULL)
 715                                         dput(de);
 716                         }
 717                 } else {
 718                         rc = finish_no_open(file, de);
 719                 }
 720         }
 721
 722 out_release:
 723         ll_intent_release(it);
 724         OBD_FREE(it, sizeof(*it));
 725
 726         RETURN(rc);
 727 }
 728
 729 #else /* !HAVE_IOP_ATOMIC_OPEN */
 730 static struct lookup_intent *
 731 ll_convert_intent(struct open_intent *oit, int lookup_flags)
 732 {
 733         struct lookup_intent *it;
 734
 735         OBD_ALLOC_PTR(it);
 736         if (!it)
 737                 return ERR_PTR(-ENOMEM);
 738
 739         if (lookup_flags & LOOKUP_OPEN) {
 740                 it->it_op = IT_OPEN;
 741                 if (lookup_flags & LOOKUP_CREATE)
 742                         it->it_op |= IT_CREAT;
 743                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
 744                 it->it_flags = ll_namei_to_lookup_intent_flag(oit->flags);
 745                 it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
 746         } else {
 747                 it->it_op = IT_GETATTR;
 748         }
 749
 750         return it;
 751 }
 752
 753 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 754                                    struct nameidata *nd)
 755 {
 756         struct dentry *de;
 757         ENTRY;
 758
 759         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 760                 struct lookup_intent *it;
 761
 762                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 763                         it = ll_d2d(dentry)->lld_it;
 764                         ll_d2d(dentry)->lld_it = NULL;
 765                 } else {
 766                         if ((nd->flags & LOOKUP_CREATE) &&
 767                             !(nd->flags & LOOKUP_OPEN))
 768                                 RETURN(NULL);
 769
 770                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 771                         if (IS_ERR(it))
 772                                 RETURN((struct dentry *)it);
 773                 }
 774
 775                 de = ll_lookup_it(parent, dentry, it);
 776                 if (de)
 777                         dentry = de;
 778                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 779                         if (dentry->d_inode &&
 780                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 781                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 782                                         // We cannot call open here as it would
 783                                         // deadlock.
 784                                         ptlrpc_req_finished(
 785                                                        (struct ptlrpc_request *)
 786                                                           it->d.lustre.it_data);
 787                                 } else {
 788                                         struct file *filp;
 789
 790                                         nd->intent.open.file->private_data = it;
 791                                         filp = lookup_instantiate_filp(nd,
 792                                                                        dentry,
 793                                                                        NULL);
 794                                         if (IS_ERR(filp)) {
 795                                                 if (de)
 796                                                         dput(de);
 797                                                 de = (struct dentry *)filp;
 798                                         }
 799                                 }
 800                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 801                                 // XXX This can only reliably work on assumption
 802                                 // that there are NO hashed negative dentries.
 803                                 ll_d2d(dentry)->lld_it = it;
 804                                 it = NULL; /* Will be freed in ll_create_nd */
 805                                 /* We absolutely depend on ll_create_nd to be
 806                                  * called to not leak this intent and possible
 807                                  * data attached to it */
 808                         }
 809                 }
 810
 811                 if (it) {
 812                         ll_intent_release(it);
 813                         OBD_FREE(it, sizeof(*it));
 814                 }
 815         } else {
 816                 de = ll_lookup_it(parent, dentry, NULL);
 817         }
 818
 819         RETURN(de);
 820 }
 821 #endif /* HAVE_IOP_ATOMIC_OPEN */
 822
 823 /* We depend on "mode" being set with the proper file type/umask by now */
 824 static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
 825 {
 826         struct inode *inode = NULL;
 827         struct ptlrpc_request *request = NULL;
 828         struct ll_sb_info *sbi = ll_i2sbi(dir);
 829         int rc;
 830         ENTRY;
 831
 832         LASSERT(it && it->d.lustre.it_disposition);
 833
 834         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 835         request = it->d.lustre.it_data;
 836         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 837         rc = ll_prep_inode(&inode, request, dir->i_sb, it);
 838         if (rc)
 839                 GOTO(out, inode = ERR_PTR(rc));
 840
 841         LASSERT(ll_d_hlist_empty(&inode->i_dentry));
 842
 843         /* We asked for a lock on the directory, but were granted a
 844          * lock on the inode.  Since we finally have an inode pointer,
 845          * stuff it in the lock. */
 846         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode "DFID"(%p)\n",
 847                PFID(ll_inode2fid(inode)), inode);
 848         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
 849         EXIT;
 850  out:
 851         ptlrpc_req_finished(request);
 852         return inode;
 853 }
 854
 855 /*
 856  * By the time this is called, we already have created the directory cache
 857  * entry for the new file, but it is so far negative - it has no inode.
 858  *
 859  * We defer creating the OBD object(s) until open, to keep the intent and
 860  * non-intent code paths similar, and also because we do not have the MDS
 861  * inode number before calling ll_create_node() (which is needed for LOV),
 862  * so we would need to do yet another RPC to the MDS to store the LOV EA
 863  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 864  * lmm_size in datalen (the MDS still has code which will handle that).
 865  *
 866  * If the create succeeds, we fill in the inode information
 867  * with d_instantiate().
 868  */
 869 static int ll_create_it(struct inode *dir, struct dentry *dentry,
 870                         struct lookup_intent *it)
 871 {
 872         struct inode *inode;
 873         int rc = 0;
 874         ENTRY;
 875
 876         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
 877                dentry->d_name.len, dentry->d_name.name,
 878                PFID(ll_inode2fid(dir)), dir, LL_IT2STR(it));
 879
 880         rc = it_open_error(DISP_OPEN_CREATE, it);
 881         if (rc)
 882                 RETURN(rc);
 883
 884         inode = ll_create_node(dir, it);
 885         if (IS_ERR(inode))
 886                 RETURN(PTR_ERR(inode));
 887
 888         d_instantiate(dentry, inode);
 889         RETURN(0);
 890 }
 891
 892 void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
 893 {
 894         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 895                                                        &RMF_MDT_BODY);
 896
 897         LASSERT(body);
 898         if (body->mbo_valid & OBD_MD_FLMTIME &&
 899             body->mbo_mtime > LTIME_S(inode->i_mtime)) {
 900                 CDEBUG(D_INODE, "setting fid "DFID" mtime from %lu to "LPU64
 901                        "\n", PFID(ll_inode2fid(inode)),
 902                        LTIME_S(inode->i_mtime), body->mbo_mtime);
 903                 LTIME_S(inode->i_mtime) = body->mbo_mtime;
 904         }
 905
 906         if (body->mbo_valid & OBD_MD_FLCTIME &&
 907             body->mbo_ctime > LTIME_S(inode->i_ctime))
 908                 LTIME_S(inode->i_ctime) = body->mbo_ctime;
 909 }
 910
 911 static int ll_new_node(struct inode *dir, struct dentry *dchild,
 912                        const char *tgt, umode_t mode, int rdev, __u32 opc)
 913 {
 914         struct qstr *name = &dchild->d_name;
 915         struct ptlrpc_request *request = NULL;
 916         struct md_op_data *op_data;
 917         struct inode *inode = NULL;
 918         struct ll_sb_info *sbi = ll_i2sbi(dir);
 919         int tgt_len = 0;
 920         int err;
 921
 922         ENTRY;
 923         if (unlikely(tgt != NULL))
 924                 tgt_len = strlen(tgt) + 1;
 925
 926 again:
 927         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 928                                      name->len, 0, opc, NULL);
 929         if (IS_ERR(op_data))
 930                 GOTO(err_exit, err = PTR_ERR(op_data));
 931
 932         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 933                         from_kuid(&init_user_ns, current_fsuid()),
 934                         from_kgid(&init_user_ns, current_fsgid()),
 935                         cfs_curproc_cap_pack(), rdev, &request);
 936         ll_finish_md_op_data(op_data);
 937         if (err) {
 938                 /* If the client doesn't know where to create a subdirectory (or
 939                  * in case of a race that sends the RPC to the wrong MDS), the
 940                  * MDS will return -EREMOTE and the client will fetch the layout
 941                  * for the directory, either from the local xattr cache or the
 942                  * MDS, then create the directory on the right MDT. */
 943                 if (err == -EREMOTE) {
 944                         struct lmv_user_md *lum;
 945                         int rc;
 946
 947                         ptlrpc_req_finished(request);
 948                         request = NULL;
 949
 950                         OBD_ALLOC_PTR(lum);
 951                         if (lum == NULL)
 952                                 GOTO(err_exit, err = -ENOMEM);
 953
 954                         rc = ll_getxattr_common(dir, XATTR_NAME_DEFAULT_LMV,
 955                                                 lum, sizeof(*lum),
 956                                                 OBD_MD_FLXATTR);
 957                         if (rc < 0) {
 958                                 OBD_FREE_PTR(lum);
 959                                 if (rc == -ENODATA)
 960                                         GOTO(err_exit, err);
 961                                 else
 962                                         GOTO(err_exit, rc);
 963                         }
 964
 965                         ll_i2info(dir)->lli_def_stripe_offset =
 966                                 le32_to_cpu(lum->lum_stripe_offset);
 967                         OBD_FREE_PTR(lum);
 968                         goto again;
 969                 }
 970                 GOTO(err_exit, err);
 971         }
 972
 973         ll_update_times(request, dir);
 974
 975         err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
 976         if (err)
 977                 GOTO(err_exit, err);
 978
 979         d_instantiate(dchild, inode);
 980
 981         EXIT;
 982 err_exit:
 983         if (request != NULL)
 984                 ptlrpc_req_finished(request);
 985
 986         return err;
 987 }
 988
 989 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
 990                     dev_t rdev)
 991 {
 992         struct qstr *name = &dchild->d_name;
 993         int err;
 994         ENTRY;
 995
 996         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p) mode %o dev %x\n",
 997                name->len, name->name, PFID(ll_inode2fid(dir)), dir,
 998                mode, rdev);
 999
1000         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1001                 mode &= ~current_umask();
1002
1003         switch (mode & S_IFMT) {
1004         case 0:
1005                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
1006         case S_IFREG:
1007         case S_IFCHR:
1008         case S_IFBLK:
1009         case S_IFIFO:
1010         case S_IFSOCK:
1011                 err = ll_new_node(dir, dchild, NULL, mode, old_encode_dev(rdev),
1012                                   LUSTRE_OPC_MKNOD);
1013                 break;
1014         case S_IFDIR:
1015                 err = -EPERM;
1016                 break;
1017         default:
1018                 err = -EINVAL;
1019         }
1020
1021         if (!err)
1022                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
1023
1024         RETURN(err);
1025 }
1026
1027 #ifdef HAVE_IOP_ATOMIC_OPEN
1028 /*
1029  * Plain create. Intent create is handled in atomic_open.
1030  */
1031 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1032                         umode_t mode, bool want_excl)
1033 {
1034         int rc;
1035
1036         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), "
1037                            "flags=%u, excl=%d\n", dentry->d_name.len,
1038                dentry->d_name.name, PFID(ll_inode2fid(dir)),
1039                dir, mode, want_excl);
1040
1041         rc = ll_mknod(dir, dentry, mode, 0);
1042
1043         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1044
1045         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
1046                dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
1047
1048         return rc;
1049 }
1050 #else /* !HAVE_IOP_ATOMIC_OPEN */
1051 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1052                         ll_umode_t mode, struct nameidata *nd)
1053 {
1054         struct ll_dentry_data *lld = ll_d2d(dentry);
1055         struct lookup_intent *it = NULL;
1056         int rc;
1057
1058         if (lld != NULL)
1059                 it = lld->lld_it;
1060
1061         if (!it)
1062                 return ll_mknod(dir, dentry, mode, 0);
1063
1064         lld->lld_it = NULL;
1065
1066         /* Was there an error? Propagate it! */
1067         if (it->d.lustre.it_status) {
1068                 rc = it->d.lustre.it_status;
1069                 goto out;
1070         }
1071
1072         rc = ll_create_it(dir, dentry, it);
1073         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
1074                 struct file *filp;
1075
1076                 nd->intent.open.file->private_data = it;
1077                 filp = lookup_instantiate_filp(nd, dentry, NULL);
1078                 if (IS_ERR(filp))
1079                         rc = PTR_ERR(filp);
1080         }
1081
1082 out:
1083         ll_intent_release(it);
1084         OBD_FREE(it, sizeof(*it));
1085
1086         if (!rc)
1087                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1088
1089         return rc;
1090 }
1091 #endif /* HAVE_IOP_ATOMIC_OPEN */
1092
1093 static int ll_symlink(struct inode *dir, struct dentry *dchild,
1094                       const char *oldpath)
1095 {
1096         struct qstr *name = &dchild->d_name;
1097         int err;
1098         ENTRY;
1099
1100         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), target=%.*s\n",
1101                name->len, name->name, PFID(ll_inode2fid(dir)),
1102                dir, 3000, oldpath);
1103
1104         err = ll_new_node(dir, dchild, oldpath, S_IFLNK | S_IRWXUGO, 0,
1105                           LUSTRE_OPC_SYMLINK);
1106
1107         if (!err)
1108                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
1109
1110         RETURN(err);
1111 }
1112
1113 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1114                    struct dentry *new_dentry)
1115 {
1116         struct inode *src = old_dentry->d_inode;
1117         struct qstr *name = &new_dentry->d_name;
1118         struct ll_sb_info *sbi = ll_i2sbi(dir);
1119         struct ptlrpc_request *request = NULL;
1120         struct md_op_data *op_data;
1121         int err;
1122
1123         ENTRY;
1124         CDEBUG(D_VFSTRACE, "VFS Op: inode="DFID"(%p), dir="DFID"(%p), "
1125                "target=%.*s\n", PFID(ll_inode2fid(src)), src,
1126                PFID(ll_inode2fid(dir)), dir, name->len, name->name);
1127
1128         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1129                                      0, LUSTRE_OPC_ANY, NULL);
1130         if (IS_ERR(op_data))
1131                 RETURN(PTR_ERR(op_data));
1132
1133         err = md_link(sbi->ll_md_exp, op_data, &request);
1134         ll_finish_md_op_data(op_data);
1135         if (err)
1136                 GOTO(out, err);
1137
1138         ll_update_times(request, dir);
1139         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
1140         EXIT;
1141 out:
1142         ptlrpc_req_finished(request);
1143         RETURN(err);
1144 }
1145
1146 static int ll_mkdir(struct inode *dir, struct dentry *dchild, ll_umode_t mode)
1147 {
1148         struct qstr *name = &dchild->d_name;
1149         int err;
1150         ENTRY;
1151
1152         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1153                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1154
1155         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1156                 mode &= ~current_umask();
1157
1158         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1159
1160         err = ll_new_node(dir, dchild, NULL, mode, 0, LUSTRE_OPC_MKDIR);
1161         if (err == 0)
1162                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
1163
1164         RETURN(err);
1165 }
1166
1167 static int ll_rmdir(struct inode *dir, struct dentry *dchild)
1168 {
1169         struct qstr *name = &dchild->d_name;
1170         struct ptlrpc_request *request = NULL;
1171         struct md_op_data *op_data;
1172         int rc;
1173         ENTRY;
1174
1175         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1176                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1177
1178         if (unlikely(d_mountpoint(dchild)))
1179                 RETURN(-EBUSY);
1180
1181         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1182                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1183         if (IS_ERR(op_data))
1184                 RETURN(PTR_ERR(op_data));
1185
1186         if (dchild->d_inode != NULL)
1187                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1188
1189         op_data->op_fid2 = op_data->op_fid3;
1190         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1191         ll_finish_md_op_data(op_data);
1192         if (rc == 0) {
1193                 ll_update_times(request, dir);
1194                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1195         }
1196
1197         ptlrpc_req_finished(request);
1198         RETURN(rc);
1199 }
1200
1201 /**
1202  * Remove dir entry
1203  **/
1204 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1205 {
1206         struct ptlrpc_request *request = NULL;
1207         struct md_op_data *op_data;
1208         int rc;
1209         ENTRY;
1210
1211         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1212                namelen, name, PFID(ll_inode2fid(dir)), dir);
1213
1214         op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1215                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1216         if (IS_ERR(op_data))
1217                 RETURN(PTR_ERR(op_data));
1218         op_data->op_cli_flags |= CLI_RM_ENTRY;
1219         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1220         ll_finish_md_op_data(op_data);
1221         if (rc == 0) {
1222                 ll_update_times(request, dir);
1223                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1224         }
1225
1226         ptlrpc_req_finished(request);
1227         RETURN(rc);
1228 }
1229
1230 /* ll_unlink() doesn't update the inode with the new link count.
1231  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if
1232  * there is any lock existing. They will recycle dentries and inodes
1233  * based upon locks too. b=20433 */
1234 static int ll_unlink(struct inode *dir, struct dentry *dchild)
1235 {
1236         struct qstr *name = &dchild->d_name;
1237         struct ptlrpc_request *request = NULL;
1238         struct md_op_data *op_data;
1239         int rc;
1240         ENTRY;
1241         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1242                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1243
1244         /*
1245          * XXX: unlink bind mountpoint maybe call to here,
1246          * just check it as vfs_unlink does.
1247          */
1248         if (unlikely(d_mountpoint(dchild)))
1249                 RETURN(-EBUSY);
1250
1251         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len, 0,
1252                                      LUSTRE_OPC_ANY, NULL);
1253         if (IS_ERR(op_data))
1254                 RETURN(PTR_ERR(op_data));
1255
1256         if (dchild->d_inode != NULL)
1257                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1258
1259         op_data->op_fid2 = op_data->op_fid3;
1260         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1261         ll_finish_md_op_data(op_data);
1262         if (rc)
1263                 GOTO(out, rc);
1264
1265         ll_update_times(request, dir);
1266         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1267
1268  out:
1269         ptlrpc_req_finished(request);
1270         RETURN(rc);
1271 }
1272
1273 static int ll_rename(struct inode *src, struct dentry *src_dchild,
1274                      struct inode *tgt, struct dentry *tgt_dchild)
1275 {
1276         struct qstr *src_name = &src_dchild->d_name;
1277         struct qstr *tgt_name = &tgt_dchild->d_name;
1278         struct ptlrpc_request *request = NULL;
1279         struct ll_sb_info *sbi = ll_i2sbi(src);
1280         struct md_op_data *op_data;
1281         int err;
1282         ENTRY;
1283         CDEBUG(D_VFSTRACE, "VFS Op:oldname=%.*s, src_dir="DFID
1284                "(%p), newname=%.*s, tgt_dir="DFID"(%p)\n",
1285                src_name->len, src_name->name,
1286                PFID(ll_inode2fid(src)), src, tgt_name->len,
1287                tgt_name->name, PFID(ll_inode2fid(tgt)), tgt);
1288
1289         if (unlikely(d_mountpoint(src_dchild) || d_mountpoint(tgt_dchild)))
1290                 RETURN(-EBUSY);
1291
1292         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1293                                      LUSTRE_OPC_ANY, NULL);
1294         if (IS_ERR(op_data))
1295                 RETURN(PTR_ERR(op_data));
1296
1297         if (src_dchild->d_inode != NULL)
1298                 op_data->op_fid3 = *ll_inode2fid(src_dchild->d_inode);
1299
1300         if (tgt_dchild->d_inode != NULL)
1301                 op_data->op_fid4 = *ll_inode2fid(tgt_dchild->d_inode);
1302
1303         err = md_rename(sbi->ll_md_exp, op_data,
1304                         src_name->name, src_name->len,
1305                         tgt_name->name, tgt_name->len, &request);
1306         ll_finish_md_op_data(op_data);
1307         if (!err) {
1308                 ll_update_times(request, src);
1309                 ll_update_times(request, tgt);
1310                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1311         }
1312
1313         ptlrpc_req_finished(request);
1314
1315         if (err == 0)
1316                 d_move(src_dchild, tgt_dchild);
1317
1318         RETURN(err);
1319 }
1320
1321 const struct inode_operations ll_dir_inode_operations = {
1322         .mknod              = ll_mknod,
1323 #ifdef HAVE_IOP_ATOMIC_OPEN
1324         .atomic_open        = ll_atomic_open,
1325 #endif
1326         .lookup             = ll_lookup_nd,
1327         .create             = ll_create_nd,
1328         /* We need all these non-raw things for NFSD, to not patch it. */
1329         .unlink             = ll_unlink,
1330         .mkdir              = ll_mkdir,
1331         .rmdir              = ll_rmdir,
1332         .symlink            = ll_symlink,
1333         .link               = ll_link,
1334         .rename             = ll_rename,
1335         .setattr            = ll_setattr,
1336         .getattr            = ll_getattr,
1337         .permission         = ll_inode_permission,
1338         .setxattr           = ll_setxattr,
1339         .getxattr           = ll_getxattr,
1340         .listxattr          = ll_listxattr,
1341         .removexattr        = ll_removexattr,
1342 #ifdef HAVE_IOP_GET_ACL
1343         .get_acl            = ll_get_acl,
1344 #endif
1345 };
1346
1347 const struct inode_operations ll_special_inode_operations = {
1348         .setattr        = ll_setattr,
1349         .getattr        = ll_getattr,
1350         .permission     = ll_inode_permission,
1351         .setxattr       = ll_setxattr,
1352         .getxattr       = ll_getxattr,
1353         .listxattr      = ll_listxattr,
1354         .removexattr    = ll_removexattr,
1355 #ifdef HAVE_IOP_GET_ACL
1356         .get_acl            = ll_get_acl,
1357 #endif
1358 };