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