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, 2012, Whamcloud, Inc.
  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_lite.h>
  50 #include <lustre_dlm.h>
  51 #include <lustre_ver.h>
  52 #include "llite_internal.h"
  53
  54 static int ll_create_it(struct inode *, struct dentry *,
  55                         int, struct lookup_intent *);
  56
  57 /*
  58  * Check if we have something mounted at the named dchild.
  59  * In such a case there would always be dentry present.
  60  */
  61 static int ll_d_mountpoint(struct dentry *dparent, struct dentry *dchild,
  62                            struct qstr *name)
  63 {
  64         int mounted = 0;
  65
  66         if (unlikely(dchild)) {
  67                 mounted = d_mountpoint(dchild);
  68         } else if (dparent) {
  69                 dchild = d_lookup(dparent, name);
  70                 if (dchild) {
  71                         mounted = d_mountpoint(dchild);
  72                         dput(dchild);
  73                 }
  74         }
  75         return mounted;
  76 }
  77
  78 int ll_unlock(__u32 mode, struct lustre_handle *lockh)
  79 {
  80         ENTRY;
  81
  82         ldlm_lock_decref(lockh, mode);
  83
  84         RETURN(0);
  85 }
  86
  87
  88 /* called from iget5_locked->find_inode() under inode_lock spinlock */
  89 static int ll_test_inode(struct inode *inode, void *opaque)
  90 {
  91         struct ll_inode_info *lli = ll_i2info(inode);
  92         struct lustre_md     *md = opaque;
  93
  94         if (unlikely(!(md->body->valid & OBD_MD_FLID))) {
  95                 CERROR("MDS body missing FID\n");
  96                 return 0;
  97         }
  98
  99         if (!lu_fid_eq(&lli->lli_fid, &md->body->fid1))
 100                 return 0;
 101
 102         return 1;
 103 }
 104
 105 static int ll_set_inode(struct inode *inode, void *opaque)
 106 {
 107         struct ll_inode_info *lli = ll_i2info(inode);
 108         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
 109
 110         if (unlikely(!(body->valid & OBD_MD_FLID))) {
 111                 CERROR("MDS body missing FID\n");
 112                 return -EINVAL;
 113         }
 114
 115         lli->lli_fid = body->fid1;
 116         if (unlikely(!(body->valid & OBD_MD_FLTYPE))) {
 117                 CERROR("Can not initialize inode "DFID" without object type: "
 118                        "valid = "LPX64"\n", PFID(&lli->lli_fid), body->valid);
 119                 return -EINVAL;
 120         }
 121
 122         inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mode & S_IFMT);
 123         if (unlikely(inode->i_mode == 0)) {
 124                 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
 125                 return -EINVAL;
 126         }
 127
 128         ll_lli_init(lli);
 129
 130         return 0;
 131 }
 132
 133
 134 /*
 135  * Get an inode by inode number (already instantiated by the intent lookup).
 136  * Returns inode or NULL
 137  */
 138 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 139                       struct lustre_md *md)
 140 {
 141         struct inode         *inode;
 142         ENTRY;
 143
 144         LASSERT(hash != 0);
 145         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
 146
 147         if (inode) {
 148                 if (inode->i_state & I_NEW) {
 149                         int rc = 0;
 150
 151                         ll_read_inode2(inode, md);
 152                         if (S_ISREG(inode->i_mode) &&
 153                             ll_i2info(inode)->lli_clob == NULL)
 154                                 rc = cl_file_inode_init(inode, md);
 155                         if (rc != 0) {
 156                                 md->lsm = NULL;
 157                                 make_bad_inode(inode);
 158                                 unlock_new_inode(inode);
 159                                 iput(inode);
 160                                 inode = ERR_PTR(rc);
 161                         } else
 162                                 unlock_new_inode(inode);
 163                 } else if (!(inode->i_state & (I_FREEING | I_CLEAR)))
 164                         ll_update_inode(inode, md);
 165                 CDEBUG(D_VFSTRACE, "got inode: %p for "DFID"\n",
 166                        inode, PFID(&md->body->fid1));
 167         }
 168         RETURN(inode);
 169 }
 170
 171 static void ll_invalidate_negative_children(struct inode *dir)
 172 {
 173         struct dentry *dentry, *tmp_subdir;
 174         struct ll_d_hlist_node *p;
 175
 176         ll_lock_dcache(dir);
 177         ll_d_hlist_for_each_entry(dentry, p, &dir->i_dentry, d_alias) {
 178                 spin_lock(&dentry->d_lock);
 179                 if (!list_empty(&dentry->d_subdirs)) {
 180                         struct dentry *child;
 181
 182                         list_for_each_entry_safe(child, tmp_subdir,
 183                                                  &dentry->d_subdirs,
 184                                                  d_u.d_child) {
 185                                 if (child->d_inode == NULL)
 186                                         d_lustre_invalidate(child);
 187                         }
 188                 }
 189                 spin_unlock(&dentry->d_lock);
 190         }
 191         ll_unlock_dcache(dir);
 192 }
 193
 194 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 195                        void *data, int flag)
 196 {
 197         int rc;
 198         struct lustre_handle lockh;
 199         ENTRY;
 200
 201         switch (flag) {
 202         case LDLM_CB_BLOCKING:
 203                 ldlm_lock2handle(lock, &lockh);
 204                 rc = ldlm_cli_cancel(&lockh);
 205                 if (rc < 0) {
 206                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 207                         RETURN(rc);
 208                 }
 209                 break;
 210         case LDLM_CB_CANCELING: {
 211                 struct inode *inode = ll_inode_from_lock(lock);
 212                 struct ll_inode_info *lli;
 213                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 214                 struct lu_fid *fid;
 215                 ldlm_mode_t mode = lock->l_req_mode;
 216
 217                 /* Invalidate all dentries associated with this inode */
 218                 if (inode == NULL)
 219                         break;
 220
 221                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
 222                 /* For OPEN locks we differentiate between lock modes
 223                  * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
 224                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
 225                             MDS_INODELOCK_LAYOUT))
 226                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
 227
 228                 if (bits & MDS_INODELOCK_OPEN)
 229                         ll_have_md_lock(inode, &bits, mode);
 230
 231                 fid = ll_inode2fid(inode);
 232                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
 233                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
 234                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
 235                         LDLM_ERROR(lock, "data mismatch with object "
 236                                    DFID" (%p)", PFID(fid), inode);
 237                 }
 238
 239                 if (bits & MDS_INODELOCK_OPEN) {
 240                         int flags = 0;
 241                         switch (lock->l_req_mode) {
 242                         case LCK_CW:
 243                                 flags = FMODE_WRITE;
 244                                 break;
 245                         case LCK_PR:
 246                                 flags = FMODE_EXEC;
 247                                 break;
 248                         case LCK_CR:
 249                                 flags = FMODE_READ;
 250                                 break;
 251                         default:
 252                                 CERROR("Unexpected lock mode for OPEN lock "
 253                                        "%d, inode %ld\n", lock->l_req_mode,
 254                                        inode->i_ino);
 255                         }
 256                         ll_md_real_close(inode, flags);
 257                 }
 258
 259                 lli = ll_i2info(inode);
 260                 if (bits & MDS_INODELOCK_LAYOUT) {
 261                         struct cl_object_conf conf = { .coc_inode = inode,
 262                                                        .coc_invalidate = true };
 263                         rc = ll_layout_conf(inode, &conf);
 264                         if (rc)
 265                                 CDEBUG(D_INODE, "invaliding layout %d.\n", rc);
 266                 }
 267
 268                 if (bits & MDS_INODELOCK_UPDATE)
 269                         lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 270
 271                 if (S_ISDIR(inode->i_mode) &&
 272                      (bits & MDS_INODELOCK_UPDATE)) {
 273                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 274                                inode->i_ino);
 275                         truncate_inode_pages(inode->i_mapping, 0);
 276                         ll_invalidate_negative_children(inode);
 277                 }
 278
 279                 if (inode->i_sb->s_root &&
 280                     inode != inode->i_sb->s_root->d_inode &&
 281                     (bits & MDS_INODELOCK_LOOKUP))
 282                         ll_invalidate_aliases(inode);
 283                 iput(inode);
 284                 break;
 285         }
 286         default:
 287                 LBUG();
 288         }
 289
 290         RETURN(0);
 291 }
 292
 293 __u32 ll_i2suppgid(struct inode *i)
 294 {
 295         if (cfs_curproc_is_in_groups(i->i_gid))
 296                 return (__u32)i->i_gid;
 297         else
 298                 return (__u32)(-1);
 299 }
 300
 301 /* Pack the required supplementary groups into the supplied groups array.
 302  * If we don't need to use the groups from the target inode(s) then we
 303  * instead pack one or more groups from the user's supplementary group
 304  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 305 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 306 {
 307 #if 0
 308         int i;
 309 #endif
 310
 311         LASSERT(i1 != NULL);
 312         LASSERT(suppgids != NULL);
 313
 314         suppgids[0] = ll_i2suppgid(i1);
 315
 316         if (i2)
 317                 suppgids[1] = ll_i2suppgid(i2);
 318                 else
 319                         suppgids[1] = -1;
 320
 321 #if 0
 322         for (i = 0; i < current_ngroups; i++) {
 323                 if (suppgids[0] == -1) {
 324                         if (current_groups[i] != suppgids[1])
 325                                 suppgids[0] = current_groups[i];
 326                         continue;
 327                 }
 328                 if (suppgids[1] == -1) {
 329                         if (current_groups[i] != suppgids[0])
 330                                 suppgids[1] = current_groups[i];
 331                         continue;
 332                 }
 333                 break;
 334         }
 335 #endif
 336 }
 337
 338 /*
 339  * try to reuse three types of dentry:
 340  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
 341  *    by concurrent .revalidate).
 342  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
 343  *    be cleared by others calling d_lustre_revalidate).
 344  * 3. DISCONNECTED alias.
 345  */
 346 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
 347 {
 348         struct dentry *alias, *discon_alias, *invalid_alias;
 349         struct ll_d_hlist_node *p;
 350
 351         if (ll_d_hlist_empty(&inode->i_dentry))
 352                 return NULL;
 353
 354         discon_alias = invalid_alias = NULL;
 355
 356         ll_lock_dcache(inode);
 357         ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
 358                 LASSERT(alias != dentry);
 359
 360                 spin_lock(&alias->d_lock);
 361                 if (alias->d_flags & DCACHE_DISCONNECTED)
 362                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
 363                         discon_alias = alias;
 364                 else if (alias->d_parent == dentry->d_parent             &&
 365                          alias->d_name.hash == dentry->d_name.hash       &&
 366                          alias->d_name.len == dentry->d_name.len         &&
 367                          memcmp(alias->d_name.name, dentry->d_name.name,
 368                                 dentry->d_name.len) == 0)
 369                         invalid_alias = alias;
 370                 spin_unlock(&alias->d_lock);
 371
 372                 if (invalid_alias)
 373                         break;
 374         }
 375         alias = invalid_alias ?: discon_alias ?: NULL;
 376         if (alias) {
 377                 spin_lock(&alias->d_lock);
 378                 dget_dlock(alias);
 379                 spin_unlock(&alias->d_lock);
 380         }
 381         ll_unlock_dcache(inode);
 382
 383         return alias;
 384 }
 385
 386 /*
 387  * Similar to d_splice_alias(), but lustre treats invalid alias
 388  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
 389  */
 390 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
 391 {
 392         struct dentry *new;
 393
 394         if (inode) {
 395                 new = ll_find_alias(inode, de);
 396                 if (new) {
 397                         ll_dops_init(new, 1, 1);
 398                         d_move(new, de);
 399                         iput(inode);
 400                         CDEBUG(D_DENTRY,
 401                                "Reuse dentry %p inode %p refc %d flags %#x\n",
 402                               new, new->d_inode, d_refcount(new), new->d_flags);
 403                         return new;
 404                 }
 405         }
 406         ll_dops_init(de, 1, 1);
 407         __d_lustre_invalidate(de);
 408         d_add(de, inode);
 409         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
 410                de, de->d_inode, d_refcount(de), de->d_flags);
 411         return de;
 412 }
 413
 414 int ll_lookup_it_finish(struct ptlrpc_request *request,
 415                         struct lookup_intent *it, void *data)
 416 {
 417         struct it_cb_data *icbd = data;
 418         struct dentry **de = icbd->icbd_childp;
 419         struct inode *parent = icbd->icbd_parent;
 420         struct inode *inode = NULL;
 421         __u64 bits = 0;
 422         int rc;
 423         ENTRY;
 424
 425         /* NB 1 request reference will be taken away by ll_intent_lock()
 426          * when I return */
 427         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
 428                it->d.lustre.it_disposition);
 429         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 430                 rc = ll_prep_inode(&inode, request, (*de)->d_sb);
 431                 if (rc)
 432                         RETURN(rc);
 433
 434                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
 435
 436                 /* We used to query real size from OSTs here, but actually
 437                    this is not needed. For stat() calls size would be updated
 438                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 439                    2.4 and
 440                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 441                    Everybody else who needs correct file size would call
 442                    ll_glimpse_size or some equivalent themselves anyway.
 443                    Also see bug 7198. */
 444         }
 445
 446         /* Only hash *de if it is unhashed (new dentry).
 447          * Atoimc_open may passin hashed dentries for open.
 448          */
 449         if (d_unhashed(*de))
 450                 *de = ll_splice_alias(inode, *de);
 451
 452         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 453                 /* we have lookup look - unhide dentry */
 454                 if (bits & MDS_INODELOCK_LOOKUP)
 455                         d_lustre_revalidate(*de);
 456         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
 457                 /* If file created on server, don't depend on parent UPDATE
 458                  * lock to unhide it. It is left hidden and next lookup can
 459                  * find it in ll_splice_alias.
 460                  */
 461                 /* Check that parent has UPDATE lock. */
 462                 struct lookup_intent parent_it = {
 463                                         .it_op = IT_GETATTR,
 464                                         .d.lustre.it_lock_handle = 0 };
 465
 466                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it,
 467                                        &ll_i2info(parent)->lli_fid, NULL)) {
 468                         d_lustre_revalidate(*de);
 469                         ll_intent_release(&parent_it);
 470                 }
 471         }
 472
 473         RETURN(0);
 474 }
 475
 476 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 477                                    struct lookup_intent *it, int lookup_flags)
 478 {
 479         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 480         struct dentry *save = dentry, *retval;
 481         struct ptlrpc_request *req = NULL;
 482         struct md_op_data *op_data;
 483         struct it_cb_data icbd;
 484         __u32 opc;
 485         int rc;
 486         ENTRY;
 487
 488         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 489                 RETURN(ERR_PTR(-ENAMETOOLONG));
 490
 491         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 492                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 493                parent->i_generation, parent, LL_IT2STR(it));
 494
 495         if (d_mountpoint(dentry))
 496                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 497
 498         ll_frob_intent(&it, &lookup_it);
 499
 500         /* As do_lookup is called before follow_mount, root dentry may be left
 501          * not valid, revalidate it here. */
 502         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 503             (it->it_op & (IT_OPEN | IT_CREAT))) {
 504                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it,
 505                                             MDS_INODELOCK_LOOKUP);
 506                 if (rc)
 507                         RETURN(ERR_PTR(rc));
 508         }
 509
 510         if (it->it_op == IT_GETATTR) {
 511                 rc = ll_statahead_enter(parent, &dentry, 0);
 512                 if (rc == 1) {
 513                         if (dentry == save)
 514                                 GOTO(out, retval = NULL);
 515                         GOTO(out, retval = dentry);
 516                 }
 517         }
 518
 519         icbd.icbd_childp = &dentry;
 520         icbd.icbd_parent = parent;
 521
 522         if (it->it_op & IT_CREAT ||
 523             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 524                 opc = LUSTRE_OPC_CREATE;
 525         else
 526                 opc = LUSTRE_OPC_ANY;
 527
 528         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 529                                      dentry->d_name.len, lookup_flags, opc,
 530                                      NULL);
 531         if (IS_ERR(op_data))
 532                 RETURN((void *)op_data);
 533
 534         /* enforce umask if acl disabled or MDS doesn't support umask */
 535         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 536                 it->it_create_mode &= ~cfs_curproc_umask();
 537
 538         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 539                             lookup_flags, &req, ll_md_blocking_ast, 0);
 540         ll_finish_md_op_data(op_data);
 541         if (rc < 0)
 542                 GOTO(out, retval = ERR_PTR(rc));
 543
 544         rc = ll_lookup_it_finish(req, it, &icbd);
 545         if (rc != 0) {
 546                 ll_intent_release(it);
 547                 GOTO(out, retval = ERR_PTR(rc));
 548         }
 549
 550         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 551             !S_ISREG(dentry->d_inode->i_mode) &&
 552             !S_ISDIR(dentry->d_inode->i_mode)) {
 553                 ll_release_openhandle(dentry, it);
 554         }
 555         ll_lookup_finish_locks(it, dentry);
 556
 557         if (dentry == save)
 558                 GOTO(out, retval = NULL);
 559         else
 560                 GOTO(out, retval = dentry);
 561  out:
 562         if (req)
 563                 ptlrpc_req_finished(req);
 564         if (it->it_op == IT_GETATTR && (retval == NULL || retval == dentry))
 565                 ll_statahead_mark(parent, dentry);
 566         return retval;
 567 }
 568
 569 #ifdef HAVE_IOP_ATOMIC_OPEN
 570 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 571                                    unsigned int flags)
 572 {
 573         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
 574         struct dentry *de;
 575
 576         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),flags=%u\n",
 577                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 578                parent->i_generation, parent, flags);
 579
 580         /* Optimize away (CREATE && !OPEN). Let .create handle the race. */
 581         if ((flags & LOOKUP_CREATE ) && !(flags & LOOKUP_OPEN)) {
 582                 ll_dops_init(dentry, 1, 1);
 583                 __d_lustre_invalidate(dentry);
 584                 d_add(dentry, NULL);
 585                 return NULL;
 586         }
 587
 588         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
 589                 itp = NULL;
 590         else
 591                 itp = &it;
 592         de = ll_lookup_it(parent, dentry, itp, 0);
 593
 594         if (itp != NULL)
 595                 ll_intent_release(itp);
 596
 597         return de;
 598 }
 599
 600 /*
 601  * For cached negative dentry and new dentry, handle lookup/create/open
 602  * together.
 603  */
 604 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
 605                           struct file *file, unsigned open_flags,
 606                           umode_t mode, int *opened)
 607 {
 608         struct lookup_intent *it;
 609         struct dentry *de;
 610         long long lookup_flags = LOOKUP_OPEN;
 611         int rc = 0;
 612         ENTRY;
 613
 614         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),file %p,"
 615                            "open_flags %x,mode %x opened %d\n",
 616                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 617                dir->i_generation, dir, file, open_flags, mode, *opened);
 618
 619         OBD_ALLOC(it, sizeof(*it));
 620         if (!it)
 621                 RETURN(-ENOMEM);
 622
 623         it->it_op = IT_OPEN;
 624         if (mode) {
 625                 it->it_op |= IT_CREAT;
 626                 lookup_flags |= LOOKUP_CREATE;
 627         }
 628         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
 629         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
 630
 631         /* Dentry added to dcache tree in ll_lookup_it */
 632         de = ll_lookup_it(dir, dentry, it, lookup_flags);
 633         if (IS_ERR(de))
 634                 rc = PTR_ERR(de);
 635         else if (de != NULL)
 636                 dentry = de;
 637
 638         if (!rc) {
 639                 if (it_disposition(it, DISP_OPEN_CREATE)) {
 640                         /* Dentry instantiated in ll_create_it. */
 641                         rc = ll_create_it(dir, dentry, mode, it);
 642                         if (rc) {
 643                                 /* We dget in ll_splice_alias. */
 644                                 if (de != NULL)
 645                                         dput(de);
 646                                 goto out_release;
 647                         }
 648
 649                         *opened |= FILE_CREATED;
 650                 }
 651                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
 652                         /* Open dentry. */
 653                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
 654                                 /* We cannot call open here as it would
 655                                  * deadlock.
 656                                  */
 657                                 if (it_disposition(it, DISP_ENQ_OPEN_REF))
 658                                         ptlrpc_req_finished(
 659                                                        (struct ptlrpc_request *)
 660                                                           it->d.lustre.it_data);
 661                                 rc = finish_no_open(file, de);
 662                         } else {
 663                                 file->private_data = it;
 664                                 rc = finish_open(file, dentry, NULL, opened);
 665                                 /* We dget in ll_splice_alias. finish_open takes
 666                                  * care of dget for fd open.
 667                                  */
 668                                 if (de != NULL)
 669                                         dput(de);
 670                         }
 671                 } else {
 672                         rc = finish_no_open(file, de);
 673                 }
 674         }
 675
 676 out_release:
 677         ll_intent_release(it);
 678         OBD_FREE(it, sizeof(*it));
 679
 680         RETURN(rc);
 681 }
 682
 683 #else /* !HAVE_IOP_ATOMIC_OPEN */
 684 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 685                                         int lookup_flags)
 686 {
 687         struct lookup_intent *it;
 688
 689         OBD_ALLOC(it, sizeof(*it));
 690         if (!it)
 691                 return ERR_PTR(-ENOMEM);
 692
 693         if (lookup_flags & LOOKUP_OPEN) {
 694                 it->it_op = IT_OPEN;
 695                 if (lookup_flags & LOOKUP_CREATE)
 696                         it->it_op |= IT_CREAT;
 697                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
 698                 it->it_flags = ll_namei_to_lookup_intent_flag(oit->flags);
 699         } else {
 700                 it->it_op = IT_GETATTR;
 701         }
 702
 703         return it;
 704 }
 705
 706 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 707                                    struct nameidata *nd)
 708 {
 709         struct dentry *de;
 710         ENTRY;
 711
 712         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 713                 struct lookup_intent *it;
 714
 715                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 716                         it = ll_d2d(dentry)->lld_it;
 717                         ll_d2d(dentry)->lld_it = NULL;
 718                 } else {
 719                         if ((nd->flags & LOOKUP_CREATE ) && !(nd->flags & LOOKUP_OPEN)) {
 720                                 /* We are sure this is new dentry, so we need to create
 721                                    our private data and set the dentry ops */
 722                                 ll_dops_init(dentry, 1, 1);
 723                                 __d_lustre_invalidate(dentry);
 724                                 d_add(dentry, NULL);
 725                                 RETURN(NULL);
 726                         }
 727                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 728                         if (IS_ERR(it))
 729                                 RETURN((struct dentry *)it);
 730                 }
 731
 732                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 733                 if (de)
 734                         dentry = de;
 735                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 736                         if (dentry->d_inode &&
 737                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 738                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 739                                         // We cannot call open here as it would
 740                                         // deadlock.
 741                                         ptlrpc_req_finished(
 742                                                        (struct ptlrpc_request *)
 743                                                           it->d.lustre.it_data);
 744                                 } else {
 745                                         struct file *filp;
 746
 747                                         nd->intent.open.file->private_data = it;
 748                                         filp = lookup_instantiate_filp(nd,
 749                                                                        dentry,
 750                                                                        NULL);
 751                                         if (IS_ERR(filp)) {
 752                                                 if (de)
 753                                                         dput(de);
 754                                                 de = (struct dentry *)filp;
 755                                         }
 756                                 }
 757                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 758                                 // XXX This can only reliably work on assumption
 759                                 // that there are NO hashed negative dentries.
 760                                 ll_d2d(dentry)->lld_it = it;
 761                                 it = NULL; /* Will be freed in ll_create_nd */
 762                                 /* We absolutely depend on ll_create_nd to be
 763                                  * called to not leak this intent and possible
 764                                  * data attached to it */
 765                         }
 766                 }
 767
 768                 if (it) {
 769                         ll_intent_release(it);
 770                         OBD_FREE(it, sizeof(*it));
 771                 }
 772         } else {
 773                 de = ll_lookup_it(parent, dentry, NULL, 0);
 774         }
 775
 776         RETURN(de);
 777 }
 778 #endif /* HAVE_IOP_ATOMIC_OPEN */
 779
 780 /* We depend on "mode" being set with the proper file type/umask by now */
 781 static struct inode *ll_create_node(struct inode *dir, const char *name,
 782                                     int namelen, const void *data, int datalen,
 783                                     int mode, __u64 extra,
 784                                     struct lookup_intent *it)
 785 {
 786         struct inode *inode = NULL;
 787         struct ptlrpc_request *request = NULL;
 788         struct ll_sb_info *sbi = ll_i2sbi(dir);
 789         int rc;
 790         ENTRY;
 791
 792         LASSERT(it && it->d.lustre.it_disposition);
 793
 794         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 795         request = it->d.lustre.it_data;
 796         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 797         rc = ll_prep_inode(&inode, request, dir->i_sb);
 798         if (rc)
 799                 GOTO(out, inode = ERR_PTR(rc));
 800
 801         LASSERT(ll_d_hlist_empty(&inode->i_dentry));
 802
 803         /* We asked for a lock on the directory, but were granted a
 804          * lock on the inode.  Since we finally have an inode pointer,
 805          * stuff it in the lock. */
 806         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 807                inode, inode->i_ino, inode->i_generation);
 808         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
 809         EXIT;
 810  out:
 811         ptlrpc_req_finished(request);
 812         return inode;
 813 }
 814
 815 /*
 816  * By the time this is called, we already have created the directory cache
 817  * entry for the new file, but it is so far negative - it has no inode.
 818  *
 819  * We defer creating the OBD object(s) until open, to keep the intent and
 820  * non-intent code paths similar, and also because we do not have the MDS
 821  * inode number before calling ll_create_node() (which is needed for LOV),
 822  * so we would need to do yet another RPC to the MDS to store the LOV EA
 823  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 824  * lmm_size in datalen (the MDS still has code which will handle that).
 825  *
 826  * If the create succeeds, we fill in the inode information
 827  * with d_instantiate().
 828  */
 829 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 830                         struct lookup_intent *it)
 831 {
 832         struct inode *inode;
 833         int rc = 0;
 834         ENTRY;
 835
 836         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 837                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 838                dir->i_generation, dir, LL_IT2STR(it));
 839
 840         rc = it_open_error(DISP_OPEN_CREATE, it);
 841         if (rc)
 842                 RETURN(rc);
 843
 844         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 845                                NULL, 0, mode, 0, it);
 846         if (IS_ERR(inode))
 847                 RETURN(PTR_ERR(inode));
 848
 849         d_instantiate(dentry, inode);
 850         RETURN(0);
 851 }
 852
 853 static void ll_update_times(struct ptlrpc_request *request,
 854                             struct inode *inode)
 855 {
 856         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 857                                                        &RMF_MDT_BODY);
 858
 859         LASSERT(body);
 860         if (body->valid & OBD_MD_FLMTIME &&
 861             body->mtime > LTIME_S(inode->i_mtime)) {
 862                 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to "LPU64"\n",
 863                        inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
 864                 LTIME_S(inode->i_mtime) = body->mtime;
 865         }
 866         if (body->valid & OBD_MD_FLCTIME &&
 867             body->ctime > LTIME_S(inode->i_ctime))
 868                 LTIME_S(inode->i_ctime) = body->ctime;
 869 }
 870
 871 static int ll_new_node(struct inode *dir, struct qstr *name,
 872                        const char *tgt, int mode, int rdev,
 873                        struct dentry *dchild, __u32 opc)
 874 {
 875         struct ptlrpc_request *request = NULL;
 876         struct md_op_data *op_data;
 877         struct inode *inode = NULL;
 878         struct ll_sb_info *sbi = ll_i2sbi(dir);
 879         int tgt_len = 0;
 880         int err;
 881
 882         ENTRY;
 883         if (unlikely(tgt != NULL))
 884                 tgt_len = strlen(tgt) + 1;
 885
 886         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 887                                      name->len, 0, opc, NULL);
 888         if (IS_ERR(op_data))
 889                 GOTO(err_exit, err = PTR_ERR(op_data));
 890
 891         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 892                         cfs_curproc_fsuid(), cfs_curproc_fsgid(),
 893                         cfs_curproc_cap_pack(), rdev, &request);
 894         ll_finish_md_op_data(op_data);
 895         if (err)
 896                 GOTO(err_exit, err);
 897
 898         ll_update_times(request, dir);
 899
 900         if (dchild) {
 901                 err = ll_prep_inode(&inode, request, dchild->d_sb);
 902                 if (err)
 903                      GOTO(err_exit, err);
 904
 905                 d_instantiate(dchild, inode);
 906         }
 907         EXIT;
 908 err_exit:
 909         ptlrpc_req_finished(request);
 910
 911         return err;
 912 }
 913
 914 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 915                             unsigned rdev, struct dentry *dchild)
 916 {
 917         int err;
 918         ENTRY;
 919
 920         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 921                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 922                mode, rdev);
 923
 924         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
 925                 mode &= ~cfs_curproc_umask();
 926
 927         switch (mode & S_IFMT) {
 928         case 0:
 929                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 930         case S_IFREG:
 931         case S_IFCHR:
 932         case S_IFBLK:
 933         case S_IFIFO:
 934         case S_IFSOCK:
 935                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 936                                   LUSTRE_OPC_MKNOD);
 937                 break;
 938         case S_IFDIR:
 939                 err = -EPERM;
 940                 break;
 941         default:
 942                 err = -EINVAL;
 943         }
 944
 945         if (!err)
 946                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
 947
 948         RETURN(err);
 949 }
 950
 951 #ifdef HAVE_IOP_ATOMIC_OPEN
 952 /*
 953  * Plain create. Intent create is handled in atomic_open.
 954  */
 955 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 956                         umode_t mode, bool want_excl)
 957 {
 958         int rc;
 959
 960         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),"
 961                            "flags=%u, excl=%d\n",
 962                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 963                dir->i_generation, dir, mode, want_excl);
 964
 965         rc = ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 966
 967         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
 968
 969         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
 970                dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
 971
 972         return rc;
 973 }
 974 #else /* !HAVE_IOP_ATOMIC_OPEN */
 975 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 976                         ll_umode_t mode, struct nameidata *nd)
 977 {
 978         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 979         int rc;
 980
 981         if (!it)
 982                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 983
 984         ll_d2d(dentry)->lld_it = NULL;
 985
 986         /* Was there an error? Propagate it! */
 987         if (it->d.lustre.it_status) {
 988                 rc = it->d.lustre.it_status;
 989                 goto out;
 990         }
 991
 992         rc = ll_create_it(dir, dentry, mode, it);
 993         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 994                 struct file *filp;
 995
 996                 nd->intent.open.file->private_data = it;
 997                 filp = lookup_instantiate_filp(nd, dentry, NULL);
 998                 if (IS_ERR(filp))
 999                         rc = PTR_ERR(filp);
1000         }
1001
1002 out:
1003         ll_intent_release(it);
1004         OBD_FREE(it, sizeof(*it));
1005
1006         if (!rc)
1007                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1008
1009         return rc;
1010 }
1011 #endif /* HAVE_IOP_ATOMIC_OPEN */
1012
1013 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
1014                               const char *tgt, struct dentry *dchild)
1015 {
1016         int err;
1017         ENTRY;
1018
1019         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
1020                name->len, name->name, dir->i_ino, dir->i_generation,
1021                dir, 3000, tgt);
1022
1023         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
1024                           0, dchild, LUSTRE_OPC_SYMLINK);
1025
1026         if (!err)
1027                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
1028
1029         RETURN(err);
1030 }
1031
1032 static int ll_link_generic(struct inode *src,  struct inode *dir,
1033                            struct qstr *name, struct dentry *dchild)
1034 {
1035         struct ll_sb_info *sbi = ll_i2sbi(dir);
1036         struct ptlrpc_request *request = NULL;
1037         struct md_op_data *op_data;
1038         int err;
1039
1040         ENTRY;
1041         CDEBUG(D_VFSTRACE,
1042                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
1043                src->i_ino, src->i_generation, src, dir->i_ino,
1044                dir->i_generation, dir, name->len, name->name);
1045
1046         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1047                                      0, LUSTRE_OPC_ANY, NULL);
1048         if (IS_ERR(op_data))
1049                 RETURN(PTR_ERR(op_data));
1050
1051         err = md_link(sbi->ll_md_exp, op_data, &request);
1052         ll_finish_md_op_data(op_data);
1053         if (err)
1054                 GOTO(out, err);
1055
1056         ll_update_times(request, dir);
1057         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
1058         EXIT;
1059 out:
1060         ptlrpc_req_finished(request);
1061         RETURN(err);
1062 }
1063
1064 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
1065                             int mode, struct dentry *dchild)
1066
1067 {
1068         int err;
1069         ENTRY;
1070
1071         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1072                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1073
1074         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1075                 mode &= ~cfs_curproc_umask();
1076         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1077         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
1078
1079         if (!err)
1080                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
1081
1082         RETURN(err);
1083 }
1084
1085 /* Try to find the child dentry by its name.
1086    If found, put the result fid into @fid. */
1087 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
1088                              struct lu_fid *fid)
1089 {
1090         struct dentry *parent, *child;
1091
1092         parent = ll_d_hlist_entry(dir->i_dentry, struct dentry, d_alias);
1093         child = d_lookup(parent, name);
1094         if (child) {
1095                 if (child->d_inode)
1096                         *fid = *ll_inode2fid(child->d_inode);
1097                 dput(child);
1098         }
1099 }
1100
1101 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1102                             struct dentry *dchild, struct qstr *name)
1103 {
1104         struct ptlrpc_request *request = NULL;
1105         struct md_op_data *op_data;
1106         int rc;
1107         ENTRY;
1108
1109         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1110                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1111
1112         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1113                 RETURN(-EBUSY);
1114
1115         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1116                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1117         if (IS_ERR(op_data))
1118                 RETURN(PTR_ERR(op_data));
1119
1120         ll_get_child_fid(dir, name, &op_data->op_fid3);
1121         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1122         ll_finish_md_op_data(op_data);
1123         if (rc == 0) {
1124                 ll_update_times(request, dir);
1125                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1126         }
1127
1128         ptlrpc_req_finished(request);
1129         RETURN(rc);
1130 }
1131
1132 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1133 {
1134         struct mdt_body *body;
1135         struct lov_mds_md *eadata;
1136         struct lov_stripe_md *lsm = NULL;
1137         struct obd_trans_info oti = { 0 };
1138         struct obdo *oa;
1139         struct obd_capa *oc = NULL;
1140         int rc;
1141         ENTRY;
1142
1143         /* req is swabbed so this is safe */
1144         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1145         if (!(body->valid & OBD_MD_FLEASIZE))
1146                 RETURN(0);
1147
1148         if (body->eadatasize == 0) {
1149                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1150                 GOTO(out, rc = -EPROTO);
1151         }
1152
1153         /* The MDS sent back the EA because we unlinked the last reference
1154          * to this file. Use this EA to unlink the objects on the OST.
1155          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1156          * check it is complete and sensible. */
1157         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1158                                               body->eadatasize);
1159         LASSERT(eadata != NULL);
1160
1161         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1162         if (rc < 0) {
1163                 CERROR("obd_unpackmd: %d\n", rc);
1164                 GOTO(out, rc);
1165         }
1166         LASSERT(rc >= sizeof(*lsm));
1167
1168         OBDO_ALLOC(oa);
1169         if (oa == NULL)
1170                 GOTO(out_free_memmd, rc = -ENOMEM);
1171
1172         oa->o_id = lsm->lsm_object_id;
1173         oa->o_seq = lsm->lsm_object_seq;
1174         oa->o_mode = body->mode & S_IFMT;
1175         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1176
1177         if (body->valid & OBD_MD_FLCOOKIE) {
1178                 oa->o_valid |= OBD_MD_FLCOOKIE;
1179                 oti.oti_logcookies =
1180                         req_capsule_server_sized_get(&request->rq_pill,
1181                                                      &RMF_LOGCOOKIES,
1182                                                    sizeof(struct llog_cookie) *
1183                                                      lsm->lsm_stripe_count);
1184                 if (oti.oti_logcookies == NULL) {
1185                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1186                         body->valid &= ~OBD_MD_FLCOOKIE;
1187                 }
1188         }
1189
1190         if (body->valid & OBD_MD_FLOSSCAPA) {
1191                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1192                 if (rc)
1193                         GOTO(out_free_memmd, rc);
1194         }
1195
1196         rc = obd_destroy(NULL, ll_i2dtexp(dir), oa, lsm, &oti,
1197                          ll_i2mdexp(dir), oc);
1198         capa_put(oc);
1199         OBDO_FREE(oa);
1200         if (rc)
1201                 CERROR("obd destroy objid "LPX64" error %d\n",
1202                        lsm->lsm_object_id, rc);
1203  out_free_memmd:
1204         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1205  out:
1206         return rc;
1207 }
1208
1209 /* ll_unlink_generic() doesn't update the inode with the new link count.
1210  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
1211  * is any lock existing. They will recycle dentries and inodes based upon locks
1212  * too. b=20433 */
1213 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1214                              struct dentry *dchild, struct qstr *name)
1215 {
1216         struct ptlrpc_request *request = NULL;
1217         struct md_op_data *op_data;
1218         int rc;
1219         ENTRY;
1220         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1221                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1222
1223         /*
1224          * XXX: unlink bind mountpoint maybe call to here,
1225          * just check it as vfs_unlink does.
1226          */
1227         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1228                 RETURN(-EBUSY);
1229
1230         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1231                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1232         if (IS_ERR(op_data))
1233                 RETURN(PTR_ERR(op_data));
1234
1235         ll_get_child_fid(dir, name, &op_data->op_fid3);
1236         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1237         ll_finish_md_op_data(op_data);
1238         if (rc)
1239                 GOTO(out, rc);
1240
1241         ll_update_times(request, dir);
1242         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1243
1244         rc = ll_objects_destroy(request, dir);
1245  out:
1246         ptlrpc_req_finished(request);
1247         RETURN(rc);
1248 }
1249
1250 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1251                              struct dentry *src_dchild, struct qstr *src_name,
1252                              struct inode *tgt, struct dentry *tgt_dparent,
1253                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1254 {
1255         struct ptlrpc_request *request = NULL;
1256         struct ll_sb_info *sbi = ll_i2sbi(src);
1257         struct md_op_data *op_data;
1258         int err;
1259         ENTRY;
1260         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1261                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1262                src->i_ino, src->i_generation, src, tgt_name->len,
1263                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1264
1265         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1266             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1267                 RETURN(-EBUSY);
1268
1269         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1270                                      LUSTRE_OPC_ANY, NULL);
1271         if (IS_ERR(op_data))
1272                 RETURN(PTR_ERR(op_data));
1273
1274         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1275         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1276         err = md_rename(sbi->ll_md_exp, op_data,
1277                         src_name->name, src_name->len,
1278                         tgt_name->name, tgt_name->len, &request);
1279         ll_finish_md_op_data(op_data);
1280         if (!err) {
1281                 ll_update_times(request, src);
1282                 ll_update_times(request, tgt);
1283                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1284                 err = ll_objects_destroy(request, src);
1285         }
1286
1287         ptlrpc_req_finished(request);
1288
1289         RETURN(err);
1290 }
1291
1292 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1293                     dev_t rdev)
1294 {
1295         return ll_mknod_generic(dir, &dchild->d_name, mode,
1296                                 old_encode_dev(rdev), dchild);
1297 }
1298
1299 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1300 {
1301         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1302 }
1303
1304 static int ll_mkdir(struct inode *dir, struct dentry *dentry, ll_umode_t mode)
1305 {
1306         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1307 }
1308
1309 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1310 {
1311         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1312 }
1313
1314 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1315                       const char *oldname)
1316 {
1317         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1318 }
1319
1320 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1321                    struct dentry *new_dentry)
1322 {
1323         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1324                                new_dentry);
1325 }
1326
1327 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1328                      struct inode *new_dir, struct dentry *new_dentry)
1329 {
1330         int err;
1331         err = ll_rename_generic(old_dir, NULL,
1332                                  old_dentry, &old_dentry->d_name,
1333                                  new_dir, NULL, new_dentry,
1334                                  &new_dentry->d_name);
1335         if (!err) {
1336 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
1337                 if (!S_ISDIR(old_dentry->d_inode->i_mode))
1338 #endif
1339                         d_move(old_dentry, new_dentry);
1340         }
1341         return err;
1342 }
1343
1344 struct inode_operations ll_dir_inode_operations = {
1345         .mknod              = ll_mknod,
1346 #ifdef HAVE_IOP_ATOMIC_OPEN
1347         .atomic_open        = ll_atomic_open,
1348 #endif
1349         .lookup             = ll_lookup_nd,
1350         .create             = ll_create_nd,
1351         /* We need all these non-raw things for NFSD, to not patch it. */
1352         .unlink             = ll_unlink,
1353         .mkdir              = ll_mkdir,
1354         .rmdir              = ll_rmdir,
1355         .symlink            = ll_symlink,
1356         .link               = ll_link,
1357         .rename             = ll_rename,
1358         .setattr            = ll_setattr,
1359         .getattr            = ll_getattr,
1360         .permission         = ll_inode_permission,
1361         .setxattr           = ll_setxattr,
1362         .getxattr           = ll_getxattr,
1363         .listxattr          = ll_listxattr,
1364         .removexattr        = ll_removexattr,
1365 #ifdef HAVE_IOP_GET_ACL
1366         .get_acl            = ll_get_acl,
1367 #endif
1368 };
1369
1370 struct inode_operations ll_special_inode_operations = {
1371         .setattr        = ll_setattr,
1372         .getattr        = ll_getattr,
1373         .permission     = ll_inode_permission,
1374         .setxattr       = ll_setxattr,
1375         .getxattr       = ll_getxattr,
1376         .listxattr      = ll_listxattr,
1377         .removexattr    = ll_removexattr,
1378 #ifdef HAVE_IOP_GET_ACL
1379         .get_acl            = ll_get_acl,
1380 #endif
1381 };