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                         rc = cl_file_inode_init(inode, md);
 129
 130                 if (rc != 0) {
 131                         make_bad_inode(inode);
 132                         unlock_new_inode(inode);
 133                         iput(inode);
 134                         inode = ERR_PTR(rc);
 135                 } else {
 136                         unlock_new_inode(inode);
 137                 }
 138         } else if (!(inode->i_state & (I_FREEING | I_CLEAR))) {
 139                 rc = ll_update_inode(inode, md);
 140                 CDEBUG(D_VFSTRACE, "got inode: "DFID"(%p): rc = %d\n",
 141                        PFID(&md->body->mbo_fid1), inode, rc);
 142                 if (rc != 0) {
 143                         iput(inode);
 144                         inode = ERR_PTR(rc);
 145                 }
 146         }
 147
 148         RETURN(inode);
 149 }
 150
 151 static void ll_invalidate_negative_children(struct inode *dir)
 152 {
 153         struct dentry *dentry, *tmp_subdir;
 154         DECLARE_LL_D_HLIST_NODE_PTR(p);
 155
 156         ll_lock_dcache(dir);
 157         ll_d_hlist_for_each_entry(dentry, p, &dir->i_dentry) {
 158                 spin_lock(&dentry->d_lock);
 159                 if (!list_empty(&dentry->d_subdirs)) {
 160                         struct dentry *child;
 161
 162                         list_for_each_entry_safe(child, tmp_subdir,
 163                                                  &dentry->d_subdirs,
 164                                                  d_child) {
 165                                 if (child->d_inode == NULL)
 166                                         d_lustre_invalidate(child, 1);
 167                         }
 168                 }
 169                 spin_unlock(&dentry->d_lock);
 170         }
 171         ll_unlock_dcache(dir);
 172 }
 173
 174 int ll_test_inode_by_fid(struct inode *inode, void *opaque)
 175 {
 176         return lu_fid_eq(&ll_i2info(inode)->lli_fid, opaque);
 177 }
 178
 179 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 180                        void *data, int flag)
 181 {
 182         struct lustre_handle lockh;
 183         int rc;
 184         ENTRY;
 185
 186         switch (flag) {
 187         case LDLM_CB_BLOCKING:
 188                 ldlm_lock2handle(lock, &lockh);
 189                 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
 190                 if (rc < 0) {
 191                         CDEBUG(D_INODE, "ldlm_cli_cancel: rc = %d\n", rc);
 192                         RETURN(rc);
 193                 }
 194                 break;
 195         case LDLM_CB_CANCELING: {
 196                 struct inode *inode = ll_inode_from_resource_lock(lock);
 197                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 198
 199                 /* Inode is set to lock->l_resource->lr_lvb_inode
 200                  * for mdc - bug 24555 */
 201                 LASSERT(lock->l_ast_data == NULL);
 202
 203                 if (inode == NULL)
 204                         break;
 205
 206                 /* Invalidate all dentries associated with this inode */
 207                 LASSERT(ldlm_is_canceling(lock));
 208
 209                 if (!fid_res_name_eq(ll_inode2fid(inode),
 210                                      &lock->l_resource->lr_name)) {
 211                         LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
 212                                    PFID(ll_inode2fid(inode)), inode);
 213                         LBUG();
 214                 }
 215
 216                 if (bits & MDS_INODELOCK_XATTR) {
 217                         if (S_ISDIR(inode->i_mode))
 218                                 ll_i2info(inode)->lli_def_stripe_offset = -1;
 219                         ll_xattr_cache_destroy(inode);
 220                         bits &= ~MDS_INODELOCK_XATTR;
 221                 }
 222
 223                 /* For OPEN locks we differentiate between lock modes
 224                  * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
 225                 if (bits & MDS_INODELOCK_OPEN)
 226                         ll_have_md_lock(inode, &bits, lock->l_req_mode);
 227
 228                 if (bits & MDS_INODELOCK_OPEN) {
 229                         fmode_t fmode;
 230
 231                         switch (lock->l_req_mode) {
 232                         case LCK_CW:
 233                                 fmode = FMODE_WRITE;
 234                                 break;
 235                         case LCK_PR:
 236                                 fmode = FMODE_EXEC;
 237                                 break;
 238                         case LCK_CR:
 239                                 fmode = FMODE_READ;
 240                                 break;
 241                         default:
 242                                 LDLM_ERROR(lock, "bad lock mode for OPEN lock");
 243                                 LBUG();
 244                         }
 245
 246                         ll_md_real_close(inode, fmode);
 247
 248                         bits &= ~MDS_INODELOCK_OPEN;
 249                 }
 250
 251                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
 252                             MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM))
 253                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
 254
 255                 if (bits & MDS_INODELOCK_LAYOUT) {
 256                         struct cl_object_conf conf = {
 257                                 .coc_opc = OBJECT_CONF_INVALIDATE,
 258                                 .coc_inode = inode,
 259                         };
 260
 261                         rc = ll_layout_conf(inode, &conf);
 262                         if (rc < 0)
 263                                 CDEBUG(D_INODE, "cannot invalidate layout of "
 264                                        DFID": rc = %d\n",
 265                                        PFID(ll_inode2fid(inode)), rc);
 266                 }
 267
 268                 if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
 269                         struct ll_inode_info *lli = ll_i2info(inode);
 270
 271                         CDEBUG(D_INODE, "invalidating inode "DFID" lli = %p, "
 272                                "pfid  = "DFID"\n", PFID(ll_inode2fid(inode)),
 273                                lli, PFID(&lli->lli_pfid));
 274                         truncate_inode_pages(inode->i_mapping, 0);
 275
 276                         if (unlikely(!fid_is_zero(&lli->lli_pfid))) {
 277                                 struct inode *master_inode = NULL;
 278                                 unsigned long hash;
 279
 280                                 /* This is slave inode, since all of the child
 281                                  * dentry is connected on the master inode, so
 282                                  * we have to invalidate the negative children
 283                                  * on master inode */
 284                                 CDEBUG(D_INODE, "Invalidate s"DFID" m"DFID"\n",
 285                                        PFID(ll_inode2fid(inode)),
 286                                        PFID(&lli->lli_pfid));
 287
 288                                 hash = cl_fid_build_ino(&lli->lli_pfid,
 289                                         ll_need_32bit_api(ll_i2sbi(inode)));
 290
 291                                 /* Do not lookup the inode with ilookup5,
 292                                  * otherwise it will cause dead lock,
 293                                  *
 294                                  * 1. Client1 send chmod req to the MDT0, then
 295                                  * on MDT0, it enqueues master and all of its
 296                                  * slaves lock, (mdt_attr_set() ->
 297                                  * mdt_lock_slaves()), after gets master and
 298                                  * stripe0 lock, it will send the enqueue req
 299                                  * (for stripe1) to MDT1, then MDT1 finds the
 300                                  * lock has been granted to client2. Then MDT1
 301                                  * sends blocking ast to client2.
 302                                  *
 303                                  * 2. At the same time, client2 tries to unlink
 304                                  * the striped dir (rm -rf striped_dir), and
 305                                  * during lookup, it will hold the master inode
 306                                  * of the striped directory, whose inode state
 307                                  * is NEW, then tries to revalidate all of its
 308                                  * slaves, (ll_prep_inode()->ll_iget()->
 309                                  * ll_read_inode2()-> ll_update_inode().). And
 310                                  * it will be blocked on the server side because
 311                                  * of 1.
 312                                  *
 313                                  * 3. Then the client get the blocking_ast req,
 314                                  * cancel the lock, but being blocked if using
 315                                  * ->ilookup5()), because master inode state is
 316                                  *  NEW. */
 317                                 master_inode = ilookup5_nowait(inode->i_sb,
 318                                                     hash, ll_test_inode_by_fid,
 319                                                         (void *)&lli->lli_pfid);
 320                                 if (master_inode != NULL &&
 321                                         !IS_ERR(master_inode)) {
 322                                         ll_invalidate_negative_children(
 323                                                                 master_inode);
 324                                         iput(master_inode);
 325                                 }
 326                         } else {
 327                                 ll_invalidate_negative_children(inode);
 328                         }
 329                 }
 330
 331                 if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
 332                     inode->i_sb->s_root != NULL &&
 333                     inode != inode->i_sb->s_root->d_inode)
 334                         ll_invalidate_aliases(inode);
 335
 336                 iput(inode);
 337                 break;
 338         }
 339         default:
 340                 LBUG();
 341         }
 342
 343         RETURN(0);
 344 }
 345
 346 __u32 ll_i2suppgid(struct inode *i)
 347 {
 348         if (in_group_p(i->i_gid))
 349                 return (__u32)from_kgid(&init_user_ns, i->i_gid);
 350         else
 351                 return (__u32) __kgid_val(INVALID_GID);
 352 }
 353
 354 /* Pack the required supplementary groups into the supplied groups array.
 355  * If we don't need to use the groups from the target inode(s) then we
 356  * instead pack one or more groups from the user's supplementary group
 357  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 358 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 359 {
 360         LASSERT(i1 != NULL);
 361         LASSERT(suppgids != NULL);
 362
 363         suppgids[0] = ll_i2suppgid(i1);
 364
 365         if (i2)
 366                 suppgids[1] = ll_i2suppgid(i2);
 367         else
 368                 suppgids[1] = -1;
 369 }
 370
 371 /*
 372  * try to reuse three types of dentry:
 373  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
 374  *    by concurrent .revalidate).
 375  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
 376  *    be cleared by others calling d_lustre_revalidate).
 377  * 3. DISCONNECTED alias.
 378  */
 379 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
 380 {
 381         struct dentry *alias, *discon_alias, *invalid_alias;
 382         DECLARE_LL_D_HLIST_NODE_PTR(p);
 383
 384         if (ll_d_hlist_empty(&inode->i_dentry))
 385                 return NULL;
 386
 387         discon_alias = invalid_alias = NULL;
 388
 389         ll_lock_dcache(inode);
 390         ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry) {
 391                 LASSERT(alias != dentry);
 392
 393                 spin_lock(&alias->d_lock);
 394                 if (alias->d_flags & DCACHE_DISCONNECTED)
 395                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
 396                         discon_alias = alias;
 397                 else if (alias->d_parent == dentry->d_parent             &&
 398                          alias->d_name.hash == dentry->d_name.hash       &&
 399                          alias->d_name.len == dentry->d_name.len         &&
 400                          memcmp(alias->d_name.name, dentry->d_name.name,
 401                                 dentry->d_name.len) == 0)
 402                         invalid_alias = alias;
 403                 spin_unlock(&alias->d_lock);
 404
 405                 if (invalid_alias)
 406                         break;
 407         }
 408         alias = invalid_alias ?: discon_alias ?: NULL;
 409         if (alias) {
 410                 spin_lock(&alias->d_lock);
 411                 dget_dlock(alias);
 412                 spin_unlock(&alias->d_lock);
 413         }
 414         ll_unlock_dcache(inode);
 415
 416         return alias;
 417 }
 418
 419 /*
 420  * Similar to d_splice_alias(), but lustre treats invalid alias
 421  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
 422  */
 423 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
 424 {
 425         struct dentry *new;
 426         int rc;
 427
 428         if (inode) {
 429                 new = ll_find_alias(inode, de);
 430                 if (new) {
 431                         rc = ll_d_init(new);
 432                         if (rc < 0) {
 433                                 dput(new);
 434                                 return ERR_PTR(rc);
 435                         }
 436                         d_move(new, de);
 437                         iput(inode);
 438                         CDEBUG(D_DENTRY,
 439                                "Reuse dentry %p inode %p refc %d flags %#x\n",
 440                               new, new->d_inode, ll_d_count(new), new->d_flags);
 441                         return new;
 442                 }
 443         }
 444         rc = ll_d_init(de);
 445         if (rc < 0)
 446                 return ERR_PTR(rc);
 447         d_add(de, inode);
 448         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
 449                de, de->d_inode, ll_d_count(de), de->d_flags);
 450         return de;
 451 }
 452
 453 static int ll_lookup_it_finish(struct ptlrpc_request *request,
 454                                struct lookup_intent *it,
 455                                struct inode *parent, struct dentry **de)
 456 {
 457         struct inode             *inode = NULL;
 458         __u64                     bits = 0;
 459         int                       rc;
 460         ENTRY;
 461
 462         /* NB 1 request reference will be taken away by ll_intent_lock()
 463          * when I return */
 464         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
 465                it->d.lustre.it_disposition);
 466         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 467                 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
 468                 if (rc)
 469                         RETURN(rc);
 470
 471                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
 472
 473                 /* We used to query real size from OSTs here, but actually
 474                    this is not needed. For stat() calls size would be updated
 475                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 476                    2.4 and
 477                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 478                    Everybody else who needs correct file size would call
 479                    ll_glimpse_size or some equivalent themselves anyway.
 480                    Also see bug 7198. */
 481         }
 482
 483         /* Only hash *de if it is unhashed (new dentry).
 484          * Atoimc_open may passin hashed dentries for open.
 485          */
 486         if (d_unhashed(*de)) {
 487                 struct dentry *alias;
 488
 489                 alias = ll_splice_alias(inode, *de);
 490                 if (IS_ERR(alias))
 491                         GOTO(out, rc = PTR_ERR(alias));
 492
 493                 *de = alias;
 494         } else if (!it_disposition(it, DISP_LOOKUP_NEG)  &&
 495                    !it_disposition(it, DISP_OPEN_CREATE)) {
 496                 /* With DISP_OPEN_CREATE dentry will
 497                    instantiated in ll_create_it. */
 498                 LASSERT((*de)->d_inode == NULL);
 499                 d_instantiate(*de, inode);
 500         }
 501
 502         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 503                 /* we have lookup look - unhide dentry */
 504                 if (bits & MDS_INODELOCK_LOOKUP)
 505                         d_lustre_revalidate(*de);
 506         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
 507                 /* If file created on server, don't depend on parent UPDATE
 508                  * lock to unhide it. It is left hidden and next lookup can
 509                  * find it in ll_splice_alias.
 510                  */
 511                 /* Check that parent has UPDATE lock. */
 512                 struct lookup_intent parent_it = {
 513                                         .it_op = IT_GETATTR,
 514                                         .d.lustre.it_lock_handle = 0 };
 515                 struct lu_fid   fid = ll_i2info(parent)->lli_fid;
 516
 517                 /* If it is striped directory, get the real stripe parent */
 518                 if (unlikely(ll_i2info(parent)->lli_lsm_md != NULL)) {
 519                         rc = md_get_fid_from_lsm(ll_i2mdexp(parent),
 520                                                  ll_i2info(parent)->lli_lsm_md,
 521                                                  (*de)->d_name.name,
 522                                                  (*de)->d_name.len, &fid);
 523                         if (rc != 0)
 524                                 GOTO(out, rc);
 525                 }
 526
 527                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it, &fid,
 528                                        NULL)) {
 529                         d_lustre_revalidate(*de);
 530                         ll_intent_release(&parent_it);
 531                 }
 532         }
 533
 534         GOTO(out, rc = 0);
 535
 536 out:
 537         if (rc != 0 && it->it_op & IT_OPEN)
 538                 ll_open_cleanup((*de)->d_sb, request);
 539
 540         return rc;
 541 }
 542
 543 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 544                                    struct lookup_intent *it)
 545 {
 546         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 547         struct dentry *save = dentry, *retval;
 548         struct ptlrpc_request *req = NULL;
 549         struct md_op_data *op_data = NULL;
 550         __u32 opc;
 551         int rc;
 552         ENTRY;
 553
 554         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 555                 RETURN(ERR_PTR(-ENAMETOOLONG));
 556
 557         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
 558                dentry->d_name.len, dentry->d_name.name,
 559                PFID(ll_inode2fid(parent)), parent, LL_IT2STR(it));
 560
 561         if (d_mountpoint(dentry))
 562                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 563
 564         if (it == NULL || it->it_op == IT_GETXATTR)
 565                 it = &lookup_it;
 566
 567         if (it->it_op == IT_GETATTR && dentry_may_statahead(parent, dentry)) {
 568                 rc = ll_statahead(parent, &dentry, 0);
 569                 if (rc == 1)
 570                         RETURN(dentry == save ? NULL : dentry);
 571         }
 572
 573         if (it->it_op & IT_CREAT)
 574                 opc = LUSTRE_OPC_CREATE;
 575         else
 576                 opc = LUSTRE_OPC_ANY;
 577
 578         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 579                                      dentry->d_name.len, 0, opc, NULL);
 580         if (IS_ERR(op_data))
 581                 RETURN((void *)op_data);
 582
 583         /* enforce umask if acl disabled or MDS doesn't support umask */
 584         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 585                 it->it_create_mode &= ~current_umask();
 586
 587         rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
 588                             &ll_md_blocking_ast, 0);
 589         /* If the MDS allows the client to chgrp (CFS_SETGRP_PERM), but the
 590          * client does not know which suppgid should be sent to the MDS, or
 591          * some other(s) changed the target file's GID after this RPC sent
 592          * to the MDS with the suppgid as the original GID, then we should
 593          * try again with right suppgid. */
 594         if (rc == -EACCES && it->it_op & IT_OPEN &&
 595             it_disposition(it, DISP_OPEN_DENY)) {
 596                 struct mdt_body *body;
 597
 598                 LASSERT(req != NULL);
 599
 600                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 601                 if (op_data->op_suppgids[0] == body->mbo_gid ||
 602                     op_data->op_suppgids[1] == body->mbo_gid ||
 603                     !in_group_p(make_kgid(&init_user_ns, body->mbo_gid)))
 604                         GOTO(out, retval = ERR_PTR(-EACCES));
 605
 606                 fid_zero(&op_data->op_fid2);
 607                 op_data->op_suppgids[1] = body->mbo_gid;
 608                 ptlrpc_req_finished(req);
 609                 req = NULL;
 610                 ll_intent_release(it);
 611                 rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
 612                                     &ll_md_blocking_ast, 0);
 613         }
 614
 615         if (rc < 0)
 616                 GOTO(out, retval = ERR_PTR(rc));
 617
 618         rc = ll_lookup_it_finish(req, it, parent, &dentry);
 619         if (rc != 0) {
 620                 ll_intent_release(it);
 621                 GOTO(out, retval = ERR_PTR(rc));
 622         }
 623
 624         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 625             !S_ISREG(dentry->d_inode->i_mode) &&
 626             !S_ISDIR(dentry->d_inode->i_mode)) {
 627                 ll_release_openhandle(dentry, it);
 628         }
 629         ll_lookup_finish_locks(it, dentry);
 630
 631         GOTO(out, retval = (dentry == save) ? NULL : dentry);
 632
 633 out:
 634         if (op_data != NULL && !IS_ERR(op_data))
 635                 ll_finish_md_op_data(op_data);
 636
 637         ptlrpc_req_finished(req);
 638         return retval;
 639 }
 640
 641 #ifdef HAVE_IOP_ATOMIC_OPEN
 642 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 643                                    unsigned int flags)
 644 {
 645         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
 646         struct dentry *de;
 647
 648         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), flags=%u\n",
 649                dentry->d_name.len, dentry->d_name.name,
 650                PFID(ll_inode2fid(parent)), parent, flags);
 651
 652         /* Optimize away (CREATE && !OPEN). Let .create handle the race. */
 653         if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN))
 654                 return NULL;
 655
 656         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
 657                 itp = NULL;
 658         else
 659                 itp = &it;
 660         de = ll_lookup_it(parent, dentry, itp);
 661
 662         if (itp != NULL)
 663                 ll_intent_release(itp);
 664
 665         return de;
 666 }
 667
 668 /*
 669  * For cached negative dentry and new dentry, handle lookup/create/open
 670  * together.
 671  */
 672 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
 673                           struct file *file, unsigned open_flags,
 674                           umode_t mode, int *opened)
 675 {
 676         struct lookup_intent *it;
 677         struct dentry *de;
 678         long long lookup_flags = LOOKUP_OPEN;
 679         int rc = 0;
 680         ENTRY;
 681
 682         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), file %p,"
 683                            "open_flags %x, mode %x opened %d\n",
 684                dentry->d_name.len, dentry->d_name.name,
 685                PFID(ll_inode2fid(dir)), dir, file, open_flags, mode, *opened);
 686
 687         OBD_ALLOC(it, sizeof(*it));
 688         if (!it)
 689                 RETURN(-ENOMEM);
 690
 691         it->it_op = IT_OPEN;
 692         if (open_flags & O_CREAT) {
 693                 it->it_op |= IT_CREAT;
 694                 lookup_flags |= LOOKUP_CREATE;
 695         }
 696         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
 697         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
 698         it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
 699
 700         /* Dentry added to dcache tree in ll_lookup_it */
 701         de = ll_lookup_it(dir, dentry, it);
 702         if (IS_ERR(de))
 703                 rc = PTR_ERR(de);
 704         else if (de != NULL)
 705                 dentry = de;
 706
 707         if (!rc) {
 708                 if (it_disposition(it, DISP_OPEN_CREATE)) {
 709                         /* Dentry instantiated in ll_create_it. */
 710                         rc = ll_create_it(dir, dentry, it);
 711                         if (rc) {
 712                                 /* We dget in ll_splice_alias. */
 713                                 if (de != NULL)
 714                                         dput(de);
 715                                 goto out_release;
 716                         }
 717
 718                         *opened |= FILE_CREATED;
 719                 }
 720                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
 721                         /* Open dentry. */
 722                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
 723                                 /* We cannot call open here as it would
 724                                  * deadlock.
 725                                  */
 726                                 if (it_disposition(it, DISP_ENQ_OPEN_REF))
 727                                         ptlrpc_req_finished(
 728                                                        (struct ptlrpc_request *)
 729                                                           it->d.lustre.it_data);
 730                                 rc = finish_no_open(file, de);
 731                         } else {
 732                                 file->private_data = it;
 733                                 rc = finish_open(file, dentry, NULL, opened);
 734                                 /* We dget in ll_splice_alias. finish_open takes
 735                                  * care of dget for fd open.
 736                                  */
 737                                 if (de != NULL)
 738                                         dput(de);
 739                         }
 740                 } else {
 741                         rc = finish_no_open(file, de);
 742                 }
 743         }
 744
 745 out_release:
 746         ll_intent_release(it);
 747         OBD_FREE(it, sizeof(*it));
 748
 749         RETURN(rc);
 750 }
 751
 752 #else /* !HAVE_IOP_ATOMIC_OPEN */
 753 static struct lookup_intent *
 754 ll_convert_intent(struct open_intent *oit, int lookup_flags)
 755 {
 756         struct lookup_intent *it;
 757
 758         OBD_ALLOC_PTR(it);
 759         if (!it)
 760                 return ERR_PTR(-ENOMEM);
 761
 762         if (lookup_flags & LOOKUP_OPEN) {
 763                 it->it_op = IT_OPEN;
 764                 if (lookup_flags & LOOKUP_CREATE)
 765                         it->it_op |= IT_CREAT;
 766                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
 767                 it->it_flags = ll_namei_to_lookup_intent_flag(oit->flags);
 768                 it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
 769         } else {
 770                 it->it_op = IT_GETATTR;
 771         }
 772
 773         return it;
 774 }
 775
 776 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 777                                    struct nameidata *nd)
 778 {
 779         struct dentry *de;
 780         ENTRY;
 781
 782         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 783                 struct lookup_intent *it;
 784
 785                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 786                         it = ll_d2d(dentry)->lld_it;
 787                         ll_d2d(dentry)->lld_it = NULL;
 788                 } else {
 789                         if ((nd->flags & LOOKUP_CREATE) &&
 790                             !(nd->flags & LOOKUP_OPEN))
 791                                 RETURN(NULL);
 792
 793                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 794                         if (IS_ERR(it))
 795                                 RETURN((struct dentry *)it);
 796                 }
 797
 798                 de = ll_lookup_it(parent, dentry, it);
 799                 if (de)
 800                         dentry = de;
 801                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 802                         if (dentry->d_inode &&
 803                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 804                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 805                                         // We cannot call open here as it would
 806                                         // deadlock.
 807                                         ptlrpc_req_finished(
 808                                                        (struct ptlrpc_request *)
 809                                                           it->d.lustre.it_data);
 810                                 } else {
 811                                         struct file *filp;
 812
 813                                         nd->intent.open.file->private_data = it;
 814                                         filp = lookup_instantiate_filp(nd,
 815                                                                        dentry,
 816                                                                        NULL);
 817                                         if (IS_ERR(filp)) {
 818                                                 if (de)
 819                                                         dput(de);
 820                                                 de = (struct dentry *)filp;
 821                                         }
 822                                 }
 823                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 824                                 // XXX This can only reliably work on assumption
 825                                 // that there are NO hashed negative dentries.
 826                                 ll_d2d(dentry)->lld_it = it;
 827                                 it = NULL; /* Will be freed in ll_create_nd */
 828                                 /* We absolutely depend on ll_create_nd to be
 829                                  * called to not leak this intent and possible
 830                                  * data attached to it */
 831                         }
 832                 }
 833
 834                 if (it) {
 835                         ll_intent_release(it);
 836                         OBD_FREE(it, sizeof(*it));
 837                 }
 838         } else {
 839                 de = ll_lookup_it(parent, dentry, NULL);
 840         }
 841
 842         RETURN(de);
 843 }
 844 #endif /* HAVE_IOP_ATOMIC_OPEN */
 845
 846 /* We depend on "mode" being set with the proper file type/umask by now */
 847 static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
 848 {
 849         struct inode *inode = NULL;
 850         struct ptlrpc_request *request = NULL;
 851         struct ll_sb_info *sbi = ll_i2sbi(dir);
 852         int rc;
 853         ENTRY;
 854
 855         LASSERT(it && it->d.lustre.it_disposition);
 856
 857         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 858         request = it->d.lustre.it_data;
 859         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 860         rc = ll_prep_inode(&inode, request, dir->i_sb, it);
 861         if (rc)
 862                 GOTO(out, inode = ERR_PTR(rc));
 863
 864         LASSERT(ll_d_hlist_empty(&inode->i_dentry));
 865
 866         /* We asked for a lock on the directory, but were granted a
 867          * lock on the inode.  Since we finally have an inode pointer,
 868          * stuff it in the lock. */
 869         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode "DFID"(%p)\n",
 870                PFID(ll_inode2fid(inode)), inode);
 871         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
 872         EXIT;
 873  out:
 874         ptlrpc_req_finished(request);
 875         return inode;
 876 }
 877
 878 /*
 879  * By the time this is called, we already have created the directory cache
 880  * entry for the new file, but it is so far negative - it has no inode.
 881  *
 882  * We defer creating the OBD object(s) until open, to keep the intent and
 883  * non-intent code paths similar, and also because we do not have the MDS
 884  * inode number before calling ll_create_node() (which is needed for LOV),
 885  * so we would need to do yet another RPC to the MDS to store the LOV EA
 886  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 887  * lmm_size in datalen (the MDS still has code which will handle that).
 888  *
 889  * If the create succeeds, we fill in the inode information
 890  * with d_instantiate().
 891  */
 892 static int ll_create_it(struct inode *dir, struct dentry *dentry,
 893                         struct lookup_intent *it)
 894 {
 895         struct inode *inode;
 896         int rc = 0;
 897         ENTRY;
 898
 899         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
 900                dentry->d_name.len, dentry->d_name.name,
 901                PFID(ll_inode2fid(dir)), dir, LL_IT2STR(it));
 902
 903         rc = it_open_error(DISP_OPEN_CREATE, it);
 904         if (rc)
 905                 RETURN(rc);
 906
 907         inode = ll_create_node(dir, it);
 908         if (IS_ERR(inode))
 909                 RETURN(PTR_ERR(inode));
 910
 911         d_instantiate(dentry, inode);
 912
 913         rc = ll_init_security(dentry, inode, dir);
 914         if (rc)
 915                 RETURN(rc);
 916
 917         RETURN(0);
 918 }
 919
 920 void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
 921 {
 922         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 923                                                        &RMF_MDT_BODY);
 924
 925         LASSERT(body);
 926         if (body->mbo_valid & OBD_MD_FLMTIME &&
 927             body->mbo_mtime > LTIME_S(inode->i_mtime)) {
 928                 CDEBUG(D_INODE, "setting fid "DFID" mtime from %lu to "LPU64
 929                        "\n", PFID(ll_inode2fid(inode)),
 930                        LTIME_S(inode->i_mtime), body->mbo_mtime);
 931                 LTIME_S(inode->i_mtime) = body->mbo_mtime;
 932         }
 933
 934         if (body->mbo_valid & OBD_MD_FLCTIME &&
 935             body->mbo_ctime > LTIME_S(inode->i_ctime))
 936                 LTIME_S(inode->i_ctime) = body->mbo_ctime;
 937 }
 938
 939 static int ll_new_node(struct inode *dir, struct dentry *dchild,
 940                        const char *tgt, umode_t mode, int rdev, __u32 opc)
 941 {
 942         struct qstr *name = &dchild->d_name;
 943         struct ptlrpc_request *request = NULL;
 944         struct md_op_data *op_data;
 945         struct inode *inode = NULL;
 946         struct ll_sb_info *sbi = ll_i2sbi(dir);
 947         int tgt_len = 0;
 948         int err;
 949
 950         ENTRY;
 951         if (unlikely(tgt != NULL))
 952                 tgt_len = strlen(tgt) + 1;
 953
 954 again:
 955         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 956                                      name->len, 0, opc, NULL);
 957         if (IS_ERR(op_data))
 958                 GOTO(err_exit, err = PTR_ERR(op_data));
 959
 960         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 961                         from_kuid(&init_user_ns, current_fsuid()),
 962                         from_kgid(&init_user_ns, current_fsgid()),
 963                         cfs_curproc_cap_pack(), rdev, &request);
 964         ll_finish_md_op_data(op_data);
 965         if (err < 0 && err != -EREMOTE)
 966                 GOTO(err_exit, err);
 967
 968         /* If the client doesn't know where to create a subdirectory (or
 969          * in case of a race that sends the RPC to the wrong MDS), the
 970          * MDS will return -EREMOTE and the client will fetch the layout
 971          * of the directory, then create the directory on the right MDT. */
 972         if (unlikely(err == -EREMOTE)) {
 973                 struct ll_inode_info    *lli = ll_i2info(dir);
 974                 struct lmv_user_md      *lum;
 975                 int                     lumsize;
 976                 int                     err2;
 977
 978                 ptlrpc_req_finished(request);
 979                 request = NULL;
 980
 981                 err2 = ll_dir_getstripe(dir, (void **)&lum, &lumsize, &request,
 982                                         OBD_MD_DEFAULT_MEA);
 983                 if (err2 == 0) {
 984                         /* Update stripe_offset and retry */
 985                         lli->lli_def_stripe_offset = lum->lum_stripe_offset;
 986                 } else if (err2 == -ENODATA &&
 987                            lli->lli_def_stripe_offset != -1) {
 988                         /* If there are no default stripe EA on the MDT, but the
 989                          * client has default stripe, then it probably means
 990                          * default stripe EA has just been deleted. */
 991                         lli->lli_def_stripe_offset = -1;
 992                 } else {
 993                         GOTO(err_exit, err);
 994                 }
 995
 996                 ptlrpc_req_finished(request);
 997                 request = NULL;
 998                 goto again;
 999         }
1000
1001         ll_update_times(request, dir);
1002
1003         err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
1004         if (err)
1005                 GOTO(err_exit, err);
1006
1007         d_instantiate(dchild, inode);
1008
1009         err = ll_init_security(dchild, inode, dir);
1010         if (err)
1011                 GOTO(err_exit, err);
1012
1013         EXIT;
1014 err_exit:
1015         if (request != NULL)
1016                 ptlrpc_req_finished(request);
1017
1018         return err;
1019 }
1020
1021 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1022                     dev_t rdev)
1023 {
1024         struct qstr *name = &dchild->d_name;
1025         int err;
1026         ENTRY;
1027
1028         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p) mode %o dev %x\n",
1029                name->len, name->name, PFID(ll_inode2fid(dir)), dir,
1030                mode, rdev);
1031
1032         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1033                 mode &= ~current_umask();
1034
1035         switch (mode & S_IFMT) {
1036         case 0:
1037                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
1038         case S_IFREG:
1039         case S_IFCHR:
1040         case S_IFBLK:
1041         case S_IFIFO:
1042         case S_IFSOCK:
1043                 err = ll_new_node(dir, dchild, NULL, mode, old_encode_dev(rdev),
1044                                   LUSTRE_OPC_MKNOD);
1045                 break;
1046         case S_IFDIR:
1047                 err = -EPERM;
1048                 break;
1049         default:
1050                 err = -EINVAL;
1051         }
1052
1053         if (!err)
1054                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
1055
1056         RETURN(err);
1057 }
1058
1059 #ifdef HAVE_IOP_ATOMIC_OPEN
1060 /*
1061  * Plain create. Intent create is handled in atomic_open.
1062  */
1063 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1064                         umode_t mode, bool want_excl)
1065 {
1066         int rc;
1067
1068         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), "
1069                            "flags=%u, excl=%d\n", dentry->d_name.len,
1070                dentry->d_name.name, PFID(ll_inode2fid(dir)),
1071                dir, mode, want_excl);
1072
1073         rc = ll_mknod(dir, dentry, mode, 0);
1074
1075         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1076
1077         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
1078                dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
1079
1080         return rc;
1081 }
1082 #else /* !HAVE_IOP_ATOMIC_OPEN */
1083 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1084                         ll_umode_t mode, struct nameidata *nd)
1085 {
1086         struct ll_dentry_data *lld = ll_d2d(dentry);
1087         struct lookup_intent *it = NULL;
1088         int rc;
1089
1090         if (lld != NULL)
1091                 it = lld->lld_it;
1092
1093         if (!it)
1094                 return ll_mknod(dir, dentry, mode, 0);
1095
1096         lld->lld_it = NULL;
1097
1098         /* Was there an error? Propagate it! */
1099         if (it->d.lustre.it_status) {
1100                 rc = it->d.lustre.it_status;
1101                 goto out;
1102         }
1103
1104         rc = ll_create_it(dir, dentry, it);
1105         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
1106                 struct file *filp;
1107
1108                 nd->intent.open.file->private_data = it;
1109                 filp = lookup_instantiate_filp(nd, dentry, NULL);
1110                 if (IS_ERR(filp))
1111                         rc = PTR_ERR(filp);
1112         }
1113
1114 out:
1115         ll_intent_release(it);
1116         OBD_FREE(it, sizeof(*it));
1117
1118         if (!rc)
1119                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1120
1121         return rc;
1122 }
1123 #endif /* HAVE_IOP_ATOMIC_OPEN */
1124
1125 static int ll_symlink(struct inode *dir, struct dentry *dchild,
1126                       const char *oldpath)
1127 {
1128         struct qstr *name = &dchild->d_name;
1129         int err;
1130         ENTRY;
1131
1132         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), target=%.*s\n",
1133                name->len, name->name, PFID(ll_inode2fid(dir)),
1134                dir, 3000, oldpath);
1135
1136         err = ll_new_node(dir, dchild, oldpath, S_IFLNK | S_IRWXUGO, 0,
1137                           LUSTRE_OPC_SYMLINK);
1138
1139         if (!err)
1140                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
1141
1142         RETURN(err);
1143 }
1144
1145 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1146                    struct dentry *new_dentry)
1147 {
1148         struct inode *src = old_dentry->d_inode;
1149         struct qstr *name = &new_dentry->d_name;
1150         struct ll_sb_info *sbi = ll_i2sbi(dir);
1151         struct ptlrpc_request *request = NULL;
1152         struct md_op_data *op_data;
1153         int err;
1154
1155         ENTRY;
1156         CDEBUG(D_VFSTRACE, "VFS Op: inode="DFID"(%p), dir="DFID"(%p), "
1157                "target=%.*s\n", PFID(ll_inode2fid(src)), src,
1158                PFID(ll_inode2fid(dir)), dir, name->len, name->name);
1159
1160         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1161                                      0, LUSTRE_OPC_ANY, NULL);
1162         if (IS_ERR(op_data))
1163                 RETURN(PTR_ERR(op_data));
1164
1165         err = md_link(sbi->ll_md_exp, op_data, &request);
1166         ll_finish_md_op_data(op_data);
1167         if (err)
1168                 GOTO(out, err);
1169
1170         ll_update_times(request, dir);
1171         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
1172         EXIT;
1173 out:
1174         ptlrpc_req_finished(request);
1175         RETURN(err);
1176 }
1177
1178 static int ll_mkdir(struct inode *dir, struct dentry *dchild, ll_umode_t mode)
1179 {
1180         struct qstr *name = &dchild->d_name;
1181         int err;
1182         ENTRY;
1183
1184         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1185                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1186
1187         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1188                 mode &= ~current_umask();
1189
1190         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1191
1192         err = ll_new_node(dir, dchild, NULL, mode, 0, LUSTRE_OPC_MKDIR);
1193         if (err == 0)
1194                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
1195
1196         RETURN(err);
1197 }
1198
1199 static int ll_rmdir(struct inode *dir, struct dentry *dchild)
1200 {
1201         struct qstr *name = &dchild->d_name;
1202         struct ptlrpc_request *request = NULL;
1203         struct md_op_data *op_data;
1204         int rc;
1205         ENTRY;
1206
1207         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1208                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1209
1210         if (unlikely(d_mountpoint(dchild)))
1211                 RETURN(-EBUSY);
1212
1213         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1214                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1215         if (IS_ERR(op_data))
1216                 RETURN(PTR_ERR(op_data));
1217
1218         if (dchild->d_inode != NULL)
1219                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1220
1221         op_data->op_fid2 = op_data->op_fid3;
1222         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1223         ll_finish_md_op_data(op_data);
1224         if (rc == 0) {
1225                 ll_update_times(request, dir);
1226                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1227         }
1228
1229         ptlrpc_req_finished(request);
1230         RETURN(rc);
1231 }
1232
1233 /**
1234  * Remove dir entry
1235  **/
1236 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1237 {
1238         struct ptlrpc_request *request = NULL;
1239         struct md_op_data *op_data;
1240         int rc;
1241         ENTRY;
1242
1243         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1244                namelen, name, PFID(ll_inode2fid(dir)), dir);
1245
1246         op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1247                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1248         if (IS_ERR(op_data))
1249                 RETURN(PTR_ERR(op_data));
1250         op_data->op_cli_flags |= CLI_RM_ENTRY;
1251         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1252         ll_finish_md_op_data(op_data);
1253         if (rc == 0) {
1254                 ll_update_times(request, dir);
1255                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1256         }
1257
1258         ptlrpc_req_finished(request);
1259         RETURN(rc);
1260 }
1261
1262 /* ll_unlink() doesn't update the inode with the new link count.
1263  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if
1264  * there is any lock existing. They will recycle dentries and inodes
1265  * based upon locks too. b=20433 */
1266 static int ll_unlink(struct inode *dir, struct dentry *dchild)
1267 {
1268         struct qstr *name = &dchild->d_name;
1269         struct ptlrpc_request *request = NULL;
1270         struct md_op_data *op_data;
1271         int rc;
1272         ENTRY;
1273         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1274                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1275
1276         /*
1277          * XXX: unlink bind mountpoint maybe call to here,
1278          * just check it as vfs_unlink does.
1279          */
1280         if (unlikely(d_mountpoint(dchild)))
1281                 RETURN(-EBUSY);
1282
1283         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len, 0,
1284                                      LUSTRE_OPC_ANY, NULL);
1285         if (IS_ERR(op_data))
1286                 RETURN(PTR_ERR(op_data));
1287
1288         if (dchild->d_inode != NULL)
1289                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1290
1291         op_data->op_fid2 = op_data->op_fid3;
1292         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1293         ll_finish_md_op_data(op_data);
1294         if (rc)
1295                 GOTO(out, rc);
1296
1297         ll_update_times(request, dir);
1298         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1299
1300  out:
1301         ptlrpc_req_finished(request);
1302         RETURN(rc);
1303 }
1304
1305 static int ll_rename(struct inode *src, struct dentry *src_dchild,
1306                      struct inode *tgt, struct dentry *tgt_dchild)
1307 {
1308         struct qstr *src_name = &src_dchild->d_name;
1309         struct qstr *tgt_name = &tgt_dchild->d_name;
1310         struct ptlrpc_request *request = NULL;
1311         struct ll_sb_info *sbi = ll_i2sbi(src);
1312         struct md_op_data *op_data;
1313         int err;
1314         ENTRY;
1315         CDEBUG(D_VFSTRACE, "VFS Op:oldname=%.*s, src_dir="DFID
1316                "(%p), newname=%.*s, tgt_dir="DFID"(%p)\n",
1317                src_name->len, src_name->name,
1318                PFID(ll_inode2fid(src)), src, tgt_name->len,
1319                tgt_name->name, PFID(ll_inode2fid(tgt)), tgt);
1320
1321         if (unlikely(d_mountpoint(src_dchild) || d_mountpoint(tgt_dchild)))
1322                 RETURN(-EBUSY);
1323
1324         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1325                                      LUSTRE_OPC_ANY, NULL);
1326         if (IS_ERR(op_data))
1327                 RETURN(PTR_ERR(op_data));
1328
1329         if (src_dchild->d_inode != NULL)
1330                 op_data->op_fid3 = *ll_inode2fid(src_dchild->d_inode);
1331
1332         if (tgt_dchild->d_inode != NULL)
1333                 op_data->op_fid4 = *ll_inode2fid(tgt_dchild->d_inode);
1334
1335         err = md_rename(sbi->ll_md_exp, op_data,
1336                         src_name->name, src_name->len,
1337                         tgt_name->name, tgt_name->len, &request);
1338         ll_finish_md_op_data(op_data);
1339         if (!err) {
1340                 ll_update_times(request, src);
1341                 ll_update_times(request, tgt);
1342                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1343         }
1344
1345         ptlrpc_req_finished(request);
1346
1347         if (err == 0)
1348                 d_move(src_dchild, tgt_dchild);
1349
1350         RETURN(err);
1351 }
1352
1353 const struct inode_operations ll_dir_inode_operations = {
1354         .mknod              = ll_mknod,
1355 #ifdef HAVE_IOP_ATOMIC_OPEN
1356         .atomic_open        = ll_atomic_open,
1357 #endif
1358         .lookup             = ll_lookup_nd,
1359         .create             = ll_create_nd,
1360         /* We need all these non-raw things for NFSD, to not patch it. */
1361         .unlink             = ll_unlink,
1362         .mkdir              = ll_mkdir,
1363         .rmdir              = ll_rmdir,
1364         .symlink            = ll_symlink,
1365         .link               = ll_link,
1366         .rename             = ll_rename,
1367         .setattr            = ll_setattr,
1368         .getattr            = ll_getattr,
1369         .permission         = ll_inode_permission,
1370         .setxattr           = ll_setxattr,
1371         .getxattr           = ll_getxattr,
1372         .listxattr          = ll_listxattr,
1373         .removexattr        = ll_removexattr,
1374 #ifdef HAVE_IOP_GET_ACL
1375         .get_acl            = ll_get_acl,
1376 #endif
1377 };
1378
1379 const struct inode_operations ll_special_inode_operations = {
1380         .setattr        = ll_setattr,
1381         .getattr        = ll_getattr,
1382         .permission     = ll_inode_permission,
1383         .setxattr       = ll_setxattr,
1384         .getxattr       = ll_getxattr,
1385         .listxattr      = ll_listxattr,
1386         .removexattr    = ll_removexattr,
1387 #ifdef HAVE_IOP_GET_ACL
1388         .get_acl            = ll_get_acl,
1389 #endif
1390 };