lustre/llite/namei.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  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/smp_lock.h>
  41 #include <linux/quotaops.h>
  42 #include <linux/highmem.h>
  43 #include <linux/pagemap.h>
  44 #include <linux/dcache.h>
  45 #include <linux/buffer_head.h>
  46
  47 #define DEBUG_SUBSYSTEM S_LLITE
  48
  49 #include <obd_support.h>
  50 #include <lustre_fid.h>
  51 #include <lustre_lite.h>
  52 #include <lustre_dlm.h>
  53 #include <lustre_ver.h>
  54 #include <lustre_mdc.h>
  55 #include "llite_internal.h"
  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         return 0;
 108 }
 109
 110
 111 /*
 112  * Get an inode by inode number (already instantiated by the intent lookup).
 113  * Returns inode or NULL
 114  */
 115 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 116                       struct lustre_md *md)
 117 {
 118         struct ll_inode_info *lli;
 119         struct inode         *inode;
 120         ENTRY;
 121
 122         LASSERT(hash != 0);
 123         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
 124
 125         if (inode) {
 126                 lli = ll_i2info(inode);
 127                 if (inode->i_state & I_NEW) {
 128                         int rc;
 129
 130                         ll_read_inode2(inode, md);
 131                         rc = cl_inode_init(inode, md);
 132                         if (rc != 0) {
 133                                 md->lsm = NULL;
 134                                 make_bad_inode(inode);
 135                                 unlock_new_inode(inode);
 136                                 iput(inode);
 137                                 inode = ERR_PTR(rc);
 138                         } else
 139                                 unlock_new_inode(inode);
 140                 } else if (!(inode->i_state & (I_FREEING | I_CLEAR)))
 141                                 ll_update_inode(inode, md);
 142                 CDEBUG(D_VFSTRACE, "got inode: %p for "DFID"\n",
 143                        inode, PFID(&md->body->fid1));
 144         }
 145         RETURN(inode);
 146 }
 147
 148 static void ll_drop_negative_dentry(struct inode *dir)
 149 {
 150         struct dentry *dentry, *tmp_alias, *tmp_subdir;
 151
 152         spin_lock(&ll_lookup_lock);
 153         spin_lock(&dcache_lock);
 154 restart:
 155         list_for_each_entry_safe(dentry, tmp_alias,
 156                                  &dir->i_dentry,d_alias) {
 157                 if (!list_empty(&dentry->d_subdirs)) {
 158                         struct dentry *child;
 159                         list_for_each_entry_safe(child, tmp_subdir,
 160                                                  &dentry->d_subdirs,
 161                                                  d_child) {
 162                                 /* XXX Print some debug here? */
 163                                 if (!child->d_inode)
 164                                 /* Negative dentry. If we were
 165                                    dropping dcache lock, go
 166                                    throught the list again */
 167                                         if (ll_drop_dentry(child))
 168                                                 goto restart;
 169                         }
 170                 }
 171         }
 172         spin_unlock(&dcache_lock);
 173         spin_unlock(&ll_lookup_lock);
 174 }
 175
 176
 177 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 178                        void *data, int flag)
 179 {
 180         int rc;
 181         struct lustre_handle lockh;
 182         ENTRY;
 183
 184         switch (flag) {
 185         case LDLM_CB_BLOCKING:
 186                 ldlm_lock2handle(lock, &lockh);
 187                 rc = ldlm_cli_cancel(&lockh);
 188                 if (rc < 0) {
 189                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 190                         RETURN(rc);
 191                 }
 192                 break;
 193         case LDLM_CB_CANCELING: {
 194                 struct inode *inode = ll_inode_from_lock(lock);
 195                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 196                 struct lu_fid *fid;
 197
 198                 /* Invalidate all dentries associated with this inode */
 199                 if (inode == NULL)
 200                         break;
 201
 202                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
 203                 if ((bits & MDS_INODELOCK_LOOKUP) &&
 204                     ll_have_md_lock(inode, MDS_INODELOCK_LOOKUP))
 205                         bits &= ~MDS_INODELOCK_LOOKUP;
 206                 if ((bits & MDS_INODELOCK_UPDATE) &&
 207                     ll_have_md_lock(inode, MDS_INODELOCK_UPDATE))
 208                         bits &= ~MDS_INODELOCK_UPDATE;
 209                 if ((bits & MDS_INODELOCK_OPEN) &&
 210                     ll_have_md_lock(inode, MDS_INODELOCK_OPEN))
 211                         bits &= ~MDS_INODELOCK_OPEN;
 212
 213                 fid = ll_inode2fid(inode);
 214                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
 215                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
 216                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
 217                         LDLM_ERROR(lock, "data mismatch with object "
 218                                    DFID" (%p)", PFID(fid), inode);
 219                 }
 220
 221                 if (bits & MDS_INODELOCK_OPEN) {
 222                         int flags = 0;
 223                         switch (lock->l_req_mode) {
 224                         case LCK_CW:
 225                                 flags = FMODE_WRITE;
 226                                 break;
 227                         case LCK_PR:
 228                                 flags = FMODE_EXEC;
 229                                 break;
 230                         case LCK_CR:
 231                                 flags = FMODE_READ;
 232                                 break;
 233                         default:
 234                                 CERROR("Unexpected lock mode for OPEN lock "
 235                                        "%d, inode %ld\n", lock->l_req_mode,
 236                                        inode->i_ino);
 237                         }
 238                         ll_md_real_close(inode, flags);
 239                 }
 240
 241                 if (bits & MDS_INODELOCK_UPDATE)
 242                         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 243
 244                 if (S_ISDIR(inode->i_mode) &&
 245                      (bits & MDS_INODELOCK_UPDATE)) {
 246                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 247                                inode->i_ino);
 248                         truncate_inode_pages(inode->i_mapping, 0);
 249                         ll_drop_negative_dentry(inode);
 250                 }
 251
 252                 if (inode->i_sb->s_root &&
 253                     inode != inode->i_sb->s_root->d_inode &&
 254                     (bits & MDS_INODELOCK_LOOKUP))
 255                         ll_unhash_aliases(inode);
 256                 iput(inode);
 257                 break;
 258         }
 259         default:
 260                 LBUG();
 261         }
 262
 263         RETURN(0);
 264 }
 265
 266 __u32 ll_i2suppgid(struct inode *i)
 267 {
 268         if (in_group_p(i->i_gid))
 269                 return (__u32)i->i_gid;
 270         else
 271                 return (__u32)(-1);
 272 }
 273
 274 /* Pack the required supplementary groups into the supplied groups array.
 275  * If we don't need to use the groups from the target inode(s) then we
 276  * instead pack one or more groups from the user's supplementary group
 277  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 278 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 279 {
 280 #if 0
 281         int i;
 282 #endif
 283
 284         LASSERT(i1 != NULL);
 285         LASSERT(suppgids != NULL);
 286
 287         suppgids[0] = ll_i2suppgid(i1);
 288
 289         if (i2)
 290                 suppgids[1] = ll_i2suppgid(i2);
 291                 else
 292                         suppgids[1] = -1;
 293
 294 #if 0
 295         for (i = 0; i < current_ngroups; i++) {
 296                 if (suppgids[0] == -1) {
 297                         if (current_groups[i] != suppgids[1])
 298                                 suppgids[0] = current_groups[i];
 299                         continue;
 300                 }
 301                 if (suppgids[1] == -1) {
 302                         if (current_groups[i] != suppgids[0])
 303                                 suppgids[1] = current_groups[i];
 304                         continue;
 305                 }
 306                 break;
 307         }
 308 #endif
 309 }
 310
 311 static void ll_d_add(struct dentry *de, struct inode *inode)
 312 {
 313         CDEBUG(D_DENTRY, "adding inode %p to dentry %p\n", inode, de);
 314         /* d_instantiate */
 315         if (!list_empty(&de->d_alias)) {
 316                 spin_unlock(&dcache_lock);
 317                 CERROR("dentry %.*s %p alias next %p, prev %p\n",
 318                        de->d_name.len, de->d_name.name, de,
 319                        de->d_alias.next, de->d_alias.prev);
 320                 LBUG();
 321         }
 322         if (inode)
 323                 list_add(&de->d_alias, &inode->i_dentry);
 324         de->d_inode = inode;
 325
 326         /* d_rehash */
 327         if (!d_unhashed(de)) {
 328                 spin_unlock(&dcache_lock);
 329                 CERROR("dentry %.*s %p hash next %p\n",
 330                        de->d_name.len, de->d_name.name, de, de->d_hash.next);
 331                 LBUG();
 332         }
 333         d_rehash_cond(de, 0);
 334 }
 335
 336 /* Search "inode"'s alias list for a dentry that has the same name and parent
 337  * as de.  If found, return it.  If not found, return de.
 338  * Lustre can't use d_add_unique because don't unhash aliases for directory
 339  * in ll_revalidate_it.  After revaliadate inode will be have hashed aliases
 340  * and it triggers BUG_ON in d_instantiate_unique (bug #10954).
 341  */
 342 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *de)
 343 {
 344         struct list_head *tmp;
 345         struct dentry *dentry;
 346         struct dentry *last_discon = NULL;
 347
 348         spin_lock(&ll_lookup_lock);
 349         spin_lock(&dcache_lock);
 350         list_for_each(tmp, &inode->i_dentry) {
 351                 dentry = list_entry(tmp, struct dentry, d_alias);
 352
 353                 /* We are called here with 'de' already on the aliases list. */
 354                 if (unlikely(dentry == de)) {
 355                         CERROR("whoops\n");
 356                         continue;
 357                 }
 358
 359                 if (dentry->d_flags & DCACHE_DISCONNECTED) {
 360                         LASSERT(last_discon == NULL);
 361                         last_discon = dentry;
 362                         continue;
 363                 }
 364
 365                 if (dentry->d_parent != de->d_parent)
 366                         continue;
 367
 368                 if (dentry->d_name.hash != de->d_name.hash)
 369                         continue;
 370
 371                 if (dentry->d_name.len != de->d_name.len)
 372                         continue;
 373
 374                 if (memcmp(dentry->d_name.name, de->d_name.name,
 375                            de->d_name.len) != 0)
 376                         continue;
 377
 378                 dget_locked(dentry);
 379                 lock_dentry(dentry);
 380                 __d_drop(dentry);
 381                 unlock_dentry(dentry);
 382                 ll_dops_init(dentry, 0);
 383                 d_rehash_cond(dentry, 0); /* avoid taking dcache_lock inside */
 384                 spin_unlock(&dcache_lock);
 385                 spin_unlock(&ll_lookup_lock);
 386                 iput(inode);
 387                 CDEBUG(D_DENTRY, "alias dentry %.*s (%p) parent %p inode %p "
 388                        "refc %d\n", de->d_name.len, de->d_name.name, de,
 389                        de->d_parent, de->d_inode, atomic_read(&de->d_count));
 390                 return dentry;
 391         }
 392
 393         if (last_discon) {
 394                 CDEBUG(D_DENTRY, "Reuse disconnected dentry %p inode %p "
 395                         "refc %d\n", last_discon, last_discon->d_inode,
 396                         atomic_read(&last_discon->d_count));
 397                 dget_locked(last_discon);
 398                 lock_dentry(last_discon);
 399                 last_discon->d_flags |= DCACHE_LUSTRE_INVALID;
 400                 unlock_dentry(last_discon);
 401                 spin_unlock(&dcache_lock);
 402                 spin_unlock(&ll_lookup_lock);
 403                 ll_dops_init(last_discon, 1);
 404                 d_rehash(de);
 405                 d_move(last_discon, de);
 406                 iput(inode);
 407                 return last_discon;
 408         }
 409         de->d_flags |= DCACHE_LUSTRE_INVALID;
 410         ll_d_add(de, inode);
 411
 412         spin_unlock(&dcache_lock);
 413         spin_unlock(&ll_lookup_lock);
 414
 415         return de;
 416 }
 417
 418 int ll_lookup_it_finish(struct ptlrpc_request *request,
 419                      struct lookup_intent *it, void *data)
 420 {
 421         struct it_cb_data *icbd = data;
 422         struct dentry **de = icbd->icbd_childp;
 423         struct inode *parent = icbd->icbd_parent;
 424         struct ll_sb_info *sbi = ll_i2sbi(parent);
 425         struct inode *inode = NULL;
 426         int rc;
 427         ENTRY;
 428
 429         /* NB 1 request reference will be taken away by ll_intent_lock()
 430          * when I return */
 431         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 432                 struct dentry *save = *de;
 433                 __u32 bits;
 434
 435                 rc = ll_prep_inode(&inode, request, (*de)->d_sb);
 436                 if (rc)
 437                         RETURN(rc);
 438
 439                 CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
 440                        inode, inode->i_ino, inode->i_generation);
 441                 md_set_lock_data(sbi->ll_md_exp,
 442                                  &it->d.lustre.it_lock_handle, inode, &bits);
 443
 444                 /* We used to query real size from OSTs here, but actually
 445                    this is not needed. For stat() calls size would be updated
 446                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 447                    2.4 and
 448                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 449                    Everybody else who needs correct file size would call
 450                    cl_glimpse_size or some equivalent themselves anyway.
 451                    Also see bug 7198. */
 452
 453                 ll_dops_init(*de, 1);
 454                 *de = ll_find_alias(inode, *de);
 455                 if (*de != save) {
 456                         struct ll_dentry_data *lld = ll_d2d(*de);
 457
 458                         /* just make sure the ll_dentry_data is ready */
 459                         if (unlikely(lld == NULL)) {
 460                                 ll_set_dd(*de);
 461                                 lld = ll_d2d(*de);
 462                                 if (likely(lld != NULL))
 463                                         lld->lld_sa_generation = 0;
 464                         }
 465                 }
 466                 /* we have lookup look - unhide dentry */
 467                 if (bits & MDS_INODELOCK_LOOKUP) {
 468                         lock_dentry(*de);
 469                         (*de)->d_flags &= ~(DCACHE_LUSTRE_INVALID);
 470                         unlock_dentry(*de);
 471                 }
 472         } else {
 473                 ll_dops_init(*de, 1);
 474                 /* Check that parent has UPDATE lock. If there is none, we
 475                    cannot afford to hash this dentry (done by ll_d_add) as it
 476                    might get picked up later when UPDATE lock will appear */
 477                 if (ll_have_md_lock(parent, MDS_INODELOCK_UPDATE)) {
 478                         spin_lock(&dcache_lock);
 479                         ll_d_add(*de, NULL);
 480                         spin_unlock(&dcache_lock);
 481                 } else {
 482                         /* negative lookup - and don't have update lock to
 483                          * parent */
 484                         lock_dentry(*de);
 485                         (*de)->d_flags |= DCACHE_LUSTRE_INVALID;
 486                         unlock_dentry(*de);
 487
 488                         (*de)->d_inode = NULL;
 489                         /* We do not want to hash the dentry if don`t have a
 490                          * lock, but if this dentry is later used in d_move,
 491                          * we'd hit uninitialised list head d_hash, so we just
 492                          * do this to init d_hash field but leave dentry
 493                          * unhashed. (bug 10796). */
 494                         d_rehash(*de);
 495                         d_drop(*de);
 496                 }
 497         }
 498
 499         RETURN(0);
 500 }
 501
 502 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 503                                    struct lookup_intent *it, int lookup_flags)
 504 {
 505         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 506         struct dentry *save = dentry, *retval;
 507         struct ptlrpc_request *req = NULL;
 508         struct md_op_data *op_data;
 509         struct it_cb_data icbd;
 510         __u32 opc;
 511         int rc, first = 0;
 512         ENTRY;
 513
 514         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 515                 RETURN(ERR_PTR(-ENAMETOOLONG));
 516
 517         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 518                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 519                parent->i_generation, parent, LL_IT2STR(it));
 520
 521         if (d_mountpoint(dentry))
 522                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 523
 524         ll_frob_intent(&it, &lookup_it);
 525
 526         /* As do_lookup is called before follow_mount, root dentry may be left
 527          * not valid, revalidate it here. */
 528         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 529             (it->it_op & (IT_OPEN | IT_CREAT))) {
 530                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it);
 531                 if (rc)
 532                         RETURN(ERR_PTR(rc));
 533         }
 534
 535         if (it->it_op == IT_GETATTR) {
 536                 first = ll_statahead_enter(parent, &dentry, 1);
 537                 if (first >= 0) {
 538                         ll_statahead_exit(dentry, first);
 539                         if (first == 1)
 540                                 RETURN(retval = dentry);
 541                 }
 542         }
 543
 544         icbd.icbd_childp = &dentry;
 545         icbd.icbd_parent = parent;
 546
 547         if (it->it_op & IT_CREAT ||
 548             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 549                 opc = LUSTRE_OPC_CREATE;
 550         else
 551                 opc = LUSTRE_OPC_ANY;
 552
 553         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 554                                      dentry->d_name.len, lookup_flags, opc,
 555                                      NULL);
 556         if (IS_ERR(op_data))
 557                 RETURN((void *)op_data);
 558
 559         it->it_create_mode &= ~current->fs->umask;
 560
 561         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 562                             lookup_flags, &req, ll_md_blocking_ast, 0);
 563         ll_finish_md_op_data(op_data);
 564         if (rc < 0)
 565                 GOTO(out, retval = ERR_PTR(rc));
 566
 567         rc = ll_lookup_it_finish(req, it, &icbd);
 568         if (rc != 0) {
 569                 ll_intent_release(it);
 570                 GOTO(out, retval = ERR_PTR(rc));
 571         }
 572
 573         if (first == -EEXIST)
 574                 ll_statahead_mark(dentry);
 575
 576         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 577             !S_ISREG(dentry->d_inode->i_mode) &&
 578             !S_ISDIR(dentry->d_inode->i_mode)) {
 579                 ll_release_openhandle(dentry, it);
 580         }
 581         ll_lookup_finish_locks(it, dentry);
 582
 583         if (dentry == save)
 584                 GOTO(out, retval = NULL);
 585         else
 586                 GOTO(out, retval = dentry);
 587  out:
 588         if (req)
 589                 ptlrpc_req_finished(req);
 590         return retval;
 591 }
 592
 593 #ifdef HAVE_VFS_INTENT_PATCHES
 594 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 595                                    struct nameidata *nd)
 596 {
 597         struct dentry *de;
 598         ENTRY;
 599
 600         if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
 601                 de = ll_lookup_it(parent, dentry, &nd->intent, nd->flags);
 602         else
 603                 de = ll_lookup_it(parent, dentry, NULL, 0);
 604
 605         RETURN(de);
 606 }
 607 #else
 608 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 609                                         int lookup_flags)
 610 {
 611         struct lookup_intent *it;
 612
 613         OBD_ALLOC(it, sizeof(*it));
 614         if (!it)
 615                 return ERR_PTR(-ENOMEM);
 616
 617         if (lookup_flags & LOOKUP_OPEN) {
 618                 it->it_op = IT_OPEN;
 619                 if (lookup_flags & LOOKUP_CREATE)
 620                         it->it_op |= IT_CREAT;
 621                 it->it_create_mode = oit->create_mode;
 622                 it->it_flags = oit->flags;
 623         } else {
 624                 it->it_op = IT_GETATTR;
 625         }
 626
 627 #ifndef HAVE_FILE_IN_STRUCT_INTENT
 628                 /* Since there is no way to pass our intent to ll_file_open,
 629                  * just check the file is there. Actual open will be done
 630                  * in ll_file_open */
 631                 if (it->it_op & IT_OPEN)
 632                         it->it_op = IT_LOOKUP;
 633 #endif
 634
 635         return it;
 636 }
 637
 638 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 639                                    struct nameidata *nd)
 640 {
 641         struct dentry *de;
 642         ENTRY;
 643
 644         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 645                 struct lookup_intent *it;
 646
 647 #if defined(HAVE_FILE_IN_STRUCT_INTENT) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 648                 /* Did we came here from failed revalidate just to propagate
 649                  * its error? */
 650                 if (nd->flags & LOOKUP_OPEN)
 651                         if (IS_ERR(nd->intent.open.file))
 652                                 RETURN((struct dentry *)nd->intent.open.file);
 653 #endif
 654
 655                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 656                         it = ll_d2d(dentry)->lld_it;
 657                         ll_d2d(dentry)->lld_it = NULL;
 658                 } else {
 659                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 660                         if (IS_ERR(it))
 661                                 RETURN((struct dentry *)it);
 662                 }
 663
 664                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 665                 if (de)
 666                         dentry = de;
 667                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 668                         if (dentry->d_inode &&
 669                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 670 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 671                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 672                                         // We cannot call open here as it would
 673                                         // deadlock.
 674                                         ptlrpc_req_finished(
 675                                                        (struct ptlrpc_request *)
 676                                                           it->d.lustre.it_data);
 677                                 } else {
 678 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 679 /* 2.6.1[456] have a bug in open_namei() that forgets to check
 680  * nd->intent.open.file for error, so we need to return it as lookup's result
 681  * instead */
 682                                         struct file *filp;
 683                                         nd->intent.open.file->private_data = it;
 684                                         filp =lookup_instantiate_filp(nd,dentry,
 685                                                                       NULL);
 686                                         if (IS_ERR(filp)) {
 687                                                 if (de)
 688                                                         dput(de);
 689                                                 de = (struct dentry *) filp;
 690                                         }
 691 #else
 692                                         nd->intent.open.file->private_data = it;
 693                                         (void)lookup_instantiate_filp(nd,dentry,
 694                                                                       NULL);
 695 #endif
 696
 697                                 }
 698 #else /* HAVE_FILE_IN_STRUCT_INTENT */
 699                                 /* Release open handle as we have no way to
 700                                  * pass it to ll_file_open */
 701                                 ll_release_openhandle(dentry, it);
 702 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
 703                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 704                                 // XXX This can only reliably work on assumption
 705                                 // that there are NO hashed negative dentries.
 706                                 ll_d2d(dentry)->lld_it = it;
 707                                 it = NULL; /* Will be freed in ll_create_nd */
 708                                 /* We absolutely depend on ll_create_nd to be
 709                                  * called to not leak this intent and possible
 710                                  * data attached to it */
 711                         }
 712                 }
 713
 714                 if (it) {
 715                         ll_intent_release(it);
 716                         OBD_FREE(it, sizeof(*it));
 717                 }
 718         } else {
 719                 de = ll_lookup_it(parent, dentry, NULL, 0);
 720         }
 721
 722         RETURN(de);
 723 }
 724 #endif
 725
 726 /**
 727  * check new allocated inode, new inode shld not have any valid alias
 728  */
 729 static void ll_validate_new_inode(struct inode *new)
 730 {
 731         struct list_head *lp;
 732         struct dentry * dentry;
 733         int need_inval = 0;
 734         int in_recheck = 0;
 735
 736         if (list_empty(&new->i_dentry))
 737                 return;
 738 recheck:
 739         spin_lock(&dcache_lock);
 740         list_for_each(lp, &new->i_dentry) {
 741                 dentry = list_entry(lp, struct dentry, d_alias);
 742                 if (!d_unhashed(dentry) && !(dentry->d_flags & DCACHE_LUSTRE_INVALID)){
 743                         ll_dump_inode(new);
 744                         if (in_recheck)
 745                                 LBUG();
 746                 }
 747                 need_inval = 1;
 748         }
 749         spin_unlock(&dcache_lock);
 750
 751         if (need_inval && !in_recheck) {
 752                 /* kill all old inode's data pages */
 753                 truncate_inode_pages(new->i_mapping, 0);
 754
 755                 /* invalidate all dirent and recheck inode */
 756                 ll_unhash_aliases(new);
 757                 in_recheck = 1;
 758                 goto recheck;
 759         }
 760 }
 761
 762 /* We depend on "mode" being set with the proper file type/umask by now */
 763 static struct inode *ll_create_node(struct inode *dir, const char *name,
 764                                     int namelen, const void *data, int datalen,
 765                                     int mode, __u64 extra,
 766                                     struct lookup_intent *it)
 767 {
 768         struct inode *inode = NULL;
 769         struct ptlrpc_request *request = NULL;
 770         struct ll_sb_info *sbi = ll_i2sbi(dir);
 771         int rc;
 772         ENTRY;
 773
 774         LASSERT(it && it->d.lustre.it_disposition);
 775
 776         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 777         request = it->d.lustre.it_data;
 778         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 779         rc = ll_prep_inode(&inode, request, dir->i_sb);
 780         if (rc)
 781                 GOTO(out, inode = ERR_PTR(rc));
 782
 783         ll_validate_new_inode(inode);
 784
 785         /* We asked for a lock on the directory, but were granted a
 786          * lock on the inode.  Since we finally have an inode pointer,
 787          * stuff it in the lock. */
 788         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 789                inode, inode->i_ino, inode->i_generation);
 790         md_set_lock_data(sbi->ll_md_exp,
 791                          &it->d.lustre.it_lock_handle, inode, NULL);
 792         EXIT;
 793  out:
 794         ptlrpc_req_finished(request);
 795         return inode;
 796 }
 797
 798 /*
 799  * By the time this is called, we already have created the directory cache
 800  * entry for the new file, but it is so far negative - it has no inode.
 801  *
 802  * We defer creating the OBD object(s) until open, to keep the intent and
 803  * non-intent code paths similar, and also because we do not have the MDS
 804  * inode number before calling ll_create_node() (which is needed for LOV),
 805  * so we would need to do yet another RPC to the MDS to store the LOV EA
 806  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 807  * lmm_size in datalen (the MDS still has code which will handle that).
 808  *
 809  * If the create succeeds, we fill in the inode information
 810  * with d_instantiate().
 811  */
 812 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 813                         struct lookup_intent *it)
 814 {
 815         struct inode *inode;
 816         int rc = 0;
 817         ENTRY;
 818
 819         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 820                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 821                dir->i_generation, dir, LL_IT2STR(it));
 822
 823         rc = it_open_error(DISP_OPEN_CREATE, it);
 824         if (rc)
 825                 RETURN(rc);
 826
 827         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 828                                NULL, 0, mode, 0, it);
 829         if (IS_ERR(inode)) {
 830                 RETURN(PTR_ERR(inode));
 831         }
 832
 833         /* it might been set during parent dir revalidation */
 834         dentry->d_flags &= ~DCACHE_LUSTRE_INVALID;
 835         d_instantiate(dentry, inode);
 836         /* Negative dentry may be unhashed if parent does not have UPDATE lock,
 837          * but some callers, e.g. do_coredump, expect dentry to be hashed after
 838          * successful create. Hash it here. */
 839         spin_lock(&dcache_lock);
 840         if (d_unhashed(dentry))
 841                 d_rehash_cond(dentry, 0);
 842         spin_unlock(&dcache_lock);
 843         RETURN(0);
 844 }
 845
 846 static void ll_update_times(struct ptlrpc_request *request,
 847                             struct inode *inode)
 848 {
 849         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 850                                                        &RMF_MDT_BODY);
 851
 852         LASSERT(body);
 853         /* mtime is always updated with ctime, but can be set in past.
 854            As write and utime(2) may happen within 1 second, and utime's
 855            mtime has a priority over write's one, so take mtime from mds
 856            for the same ctimes. */
 857         if (body->valid & OBD_MD_FLCTIME &&
 858             body->ctime >= LTIME_S(inode->i_ctime)) {
 859                 LTIME_S(inode->i_ctime) = body->ctime;
 860
 861                 if (body->valid & OBD_MD_FLMTIME) {
 862                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
 863                                "to "LPU64"\n", inode->i_ino,
 864                                LTIME_S(inode->i_mtime), body->mtime);
 865                         LTIME_S(inode->i_mtime) = body->mtime;
 866                 }
 867         }
 868 }
 869
 870 static int ll_new_node(struct inode *dir, struct qstr *name,
 871                        const char *tgt, int mode, int rdev,
 872                        struct dentry *dchild, __u32 opc)
 873 {
 874         struct ptlrpc_request *request = NULL;
 875         struct md_op_data *op_data;
 876         struct inode *inode = NULL;
 877         struct ll_sb_info *sbi = ll_i2sbi(dir);
 878         int tgt_len = 0;
 879         int err;
 880
 881         ENTRY;
 882         if (unlikely(tgt != NULL))
 883                 tgt_len = strlen(tgt) + 1;
 884
 885         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 886                                      name->len, 0, opc, NULL);
 887         if (IS_ERR(op_data))
 888                 GOTO(err_exit, err = PTR_ERR(op_data));
 889
 890         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 891                         current->fsuid, current->fsgid,
 892                         cfs_curproc_cap_pack(), rdev, &request);
 893         ll_finish_md_op_data(op_data);
 894         if (err)
 895                 GOTO(err_exit, err);
 896
 897         ll_update_times(request, dir);
 898
 899         if (dchild) {
 900                 err = ll_prep_inode(&inode, request, dchild->d_sb);
 901                 if (err)
 902                      GOTO(err_exit, err);
 903
 904                 d_drop(dchild);
 905                 d_instantiate(dchild, inode);
 906                 EXIT;
 907         }
 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         mode &= ~current->fs->umask;
 925
 926         switch (mode & S_IFMT) {
 927         case 0:
 928                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 929         case S_IFREG:
 930         case S_IFCHR:
 931         case S_IFBLK:
 932         case S_IFIFO:
 933         case S_IFSOCK:
 934                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 935                                   LUSTRE_OPC_MKNOD);
 936                 break;
 937         case S_IFDIR:
 938                 err = -EPERM;
 939                 break;
 940         default:
 941                 err = -EINVAL;
 942         }
 943         RETURN(err);
 944 }
 945
 946 #ifndef HAVE_VFS_INTENT_PATCHES
 947 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 948                         int mode, struct nameidata *nd)
 949 {
 950         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 951         int rc;
 952
 953         if (!it)
 954                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 955
 956         ll_d2d(dentry)->lld_it = NULL;
 957
 958         /* Was there an error? Propagate it! */
 959         if (it->d.lustre.it_status) {
 960                 rc = it->d.lustre.it_status;
 961                 goto out;
 962         }
 963
 964         rc = ll_create_it(dir, dentry, mode, it);
 965 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 966         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 967                 nd->intent.open.file->private_data = it;
 968                 lookup_instantiate_filp(nd, dentry, NULL);
 969         }
 970 #else
 971         ll_release_openhandle(dentry,it);
 972 #endif
 973
 974 out:
 975         ll_intent_release(it);
 976         OBD_FREE(it, sizeof(*it));
 977
 978         return rc;
 979 }
 980 #else
 981 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 982                         int mode, struct nameidata *nd)
 983 {
 984         if (!nd || !nd->intent.d.lustre.it_disposition)
 985                 /* No saved request? Just mknod the file */
 986                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 987
 988         return ll_create_it(dir, dentry, mode, &nd->intent);
 989 }
 990 #endif
 991
 992 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 993                               const char *tgt, struct dentry *dchild)
 994 {
 995         int err;
 996         ENTRY;
 997
 998         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 999                name->len, name->name, dir->i_ino, dir->i_generation,
1000                dir, 3000, tgt);
1001
1002         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
1003                           0, dchild, LUSTRE_OPC_SYMLINK);
1004         RETURN(err);
1005 }
1006
1007 static int ll_link_generic(struct inode *src,  struct inode *dir,
1008                            struct qstr *name, struct dentry *dchild)
1009 {
1010         struct ll_sb_info *sbi = ll_i2sbi(dir);
1011         struct ptlrpc_request *request = NULL;
1012         struct md_op_data *op_data;
1013         int err;
1014
1015         ENTRY;
1016         CDEBUG(D_VFSTRACE,
1017                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
1018                src->i_ino, src->i_generation, src, dir->i_ino,
1019                dir->i_generation, dir, name->len, name->name);
1020
1021         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1022                                      0, LUSTRE_OPC_ANY, NULL);
1023         if (IS_ERR(op_data))
1024                 RETURN(PTR_ERR(op_data));
1025
1026         err = md_link(sbi->ll_md_exp, op_data, &request);
1027         ll_finish_md_op_data(op_data);
1028         if (err)
1029                 GOTO(out, err);
1030         if (dchild)
1031                 d_drop(dchild);
1032
1033         ll_update_times(request, dir);
1034         EXIT;
1035 out:
1036         ptlrpc_req_finished(request);
1037         RETURN(err);
1038 }
1039
1040 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
1041                             int mode, struct dentry *dchild)
1042
1043 {
1044         int err;
1045         ENTRY;
1046
1047         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1048                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1049
1050         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
1051         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
1052
1053         RETURN(err);
1054 }
1055
1056 /* Try to find the child dentry by its name.
1057    If found, put the result fid into @fid. */
1058 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
1059                              struct lu_fid *fid)
1060 {
1061         struct dentry *parent, *child;
1062
1063         parent = list_entry(dir->i_dentry.next, struct dentry, d_alias);
1064         child = d_lookup(parent, name);
1065         if (child) {
1066                 if (child->d_inode)
1067                         *fid = *ll_inode2fid(child->d_inode);
1068                 dput(child);
1069         }
1070 }
1071
1072 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1073                             struct dentry *dchild, struct qstr *name)
1074 {
1075         struct ptlrpc_request *request = NULL;
1076         struct md_op_data *op_data;
1077         int rc;
1078         ENTRY;
1079
1080         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1081                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1082
1083         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1084                 RETURN(-EBUSY);
1085
1086         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1087                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1088         if (IS_ERR(op_data))
1089                 RETURN(PTR_ERR(op_data));
1090
1091         ll_get_child_fid(dir, name, &op_data->op_fid3);
1092         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1093         ll_finish_md_op_data(op_data);
1094         if (rc == 0)
1095                 ll_update_times(request, dir);
1096         ptlrpc_req_finished(request);
1097         RETURN(rc);
1098 }
1099
1100 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1101 {
1102         struct mdt_body *body;
1103         struct lov_mds_md *eadata;
1104         struct lov_stripe_md *lsm = NULL;
1105         struct obd_trans_info oti = { 0 };
1106         struct obdo *oa;
1107         struct obd_capa *oc = NULL;
1108         int rc;
1109         ENTRY;
1110
1111         /* req is swabbed so this is safe */
1112         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1113         if (!(body->valid & OBD_MD_FLEASIZE))
1114                 RETURN(0);
1115
1116         if (body->eadatasize == 0) {
1117                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1118                 GOTO(out, rc = -EPROTO);
1119         }
1120
1121         /* The MDS sent back the EA because we unlinked the last reference
1122          * to this file. Use this EA to unlink the objects on the OST.
1123          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1124          * check it is complete and sensible. */
1125         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1126                                               body->eadatasize);
1127         LASSERT(eadata != NULL);
1128
1129         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1130         if (rc < 0) {
1131                 CERROR("obd_unpackmd: %d\n", rc);
1132                 GOTO(out, rc);
1133         }
1134         LASSERT(rc >= sizeof(*lsm));
1135
1136         rc = obd_checkmd(ll_i2dtexp(dir), ll_i2mdexp(dir), lsm);
1137         if (rc)
1138                 GOTO(out_free_memmd, rc);
1139
1140         OBDO_ALLOC(oa);
1141         if (oa == NULL)
1142                 GOTO(out_free_memmd, rc = -ENOMEM);
1143
1144         oa->o_id = lsm->lsm_object_id;
1145         oa->o_gr = lsm->lsm_object_gr;
1146         oa->o_mode = body->mode & S_IFMT;
1147         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1148
1149         if (body->valid & OBD_MD_FLCOOKIE) {
1150                 oa->o_valid |= OBD_MD_FLCOOKIE;
1151                 oti.oti_logcookies =
1152                         req_capsule_server_sized_get(&request->rq_pill,
1153                                                      &RMF_LOGCOOKIES,
1154                                                    sizeof(struct llog_cookie) *
1155                                                      lsm->lsm_stripe_count);
1156                 if (oti.oti_logcookies == NULL) {
1157                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1158                         body->valid &= ~OBD_MD_FLCOOKIE;
1159                 }
1160         }
1161
1162         if (body->valid & OBD_MD_FLOSSCAPA) {
1163                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1164                 if (rc)
1165                         GOTO(out_free_memmd, rc);
1166         }
1167
1168         rc = obd_destroy(ll_i2dtexp(dir), oa, lsm, &oti, ll_i2mdexp(dir), oc);
1169         capa_put(oc);
1170         OBDO_FREE(oa);
1171         if (rc)
1172                 CERROR("obd destroy objid "LPX64" error %d\n",
1173                        lsm->lsm_object_id, rc);
1174  out_free_memmd:
1175         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1176  out:
1177         return rc;
1178 }
1179
1180 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1181                              struct dentry *dchild, struct qstr *name)
1182 {
1183         struct ptlrpc_request *request = NULL;
1184         struct md_op_data *op_data;
1185         int rc;
1186         ENTRY;
1187         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1188                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1189
1190         /*
1191          * XXX: unlink bind mountpoint maybe call to here,
1192          * just check it as vfs_unlink does.
1193          */
1194         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1195                 RETURN(-EBUSY);
1196
1197         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1198                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1199         if (IS_ERR(op_data))
1200                 RETURN(PTR_ERR(op_data));
1201
1202         ll_get_child_fid(dir, name, &op_data->op_fid3);
1203         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1204         ll_finish_md_op_data(op_data);
1205         if (rc)
1206                 GOTO(out, rc);
1207
1208         ll_update_times(request, dir);
1209
1210         rc = ll_objects_destroy(request, dir);
1211  out:
1212         ptlrpc_req_finished(request);
1213         RETURN(rc);
1214 }
1215
1216 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1217                              struct dentry *src_dchild, struct qstr *src_name,
1218                              struct inode *tgt, struct dentry *tgt_dparent,
1219                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1220 {
1221         struct ptlrpc_request *request = NULL;
1222         struct ll_sb_info *sbi = ll_i2sbi(src);
1223         struct md_op_data *op_data;
1224         int err;
1225         ENTRY;
1226         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1227                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1228                src->i_ino, src->i_generation, src, tgt_name->len,
1229                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1230
1231         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1232             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1233                 RETURN(-EBUSY);
1234
1235         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1236                                      LUSTRE_OPC_ANY, NULL);
1237         if (IS_ERR(op_data))
1238                 RETURN(PTR_ERR(op_data));
1239
1240         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1241         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1242         err = md_rename(sbi->ll_md_exp, op_data,
1243                         src_name->name, src_name->len,
1244                         tgt_name->name, tgt_name->len, &request);
1245         ll_finish_md_op_data(op_data);
1246         if (!err) {
1247                 ll_update_times(request, src);
1248                 ll_update_times(request, tgt);
1249                 err = ll_objects_destroy(request, src);
1250         }
1251
1252         ptlrpc_req_finished(request);
1253
1254         RETURN(err);
1255 }
1256
1257 #ifdef HAVE_VFS_INTENT_PATCHES
1258 static int ll_mknod_raw(struct nameidata *nd, int mode, dev_t rdev)
1259 {
1260         return ll_mknod_generic(nd->dentry->d_inode, &nd->last, mode,rdev,NULL);
1261 }
1262 static int ll_rename_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1263 {
1264         return ll_rename_generic(srcnd->dentry->d_inode, srcnd->dentry,
1265                                  NULL, &srcnd->last,
1266                                  tgtnd->dentry->d_inode, tgtnd->dentry,
1267                                  NULL, &tgtnd->last);
1268 }
1269 static int ll_link_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1270 {
1271         return ll_link_generic(srcnd->dentry->d_inode, tgtnd->dentry->d_inode,
1272                                &tgtnd->last, NULL);
1273 }
1274 static int ll_symlink_raw(struct nameidata *nd, const char *tgt)
1275 {
1276         return ll_symlink_generic(nd->dentry->d_inode, &nd->last, tgt, NULL);
1277 }
1278 static int ll_rmdir_raw(struct nameidata *nd)
1279 {
1280         return ll_rmdir_generic(nd->dentry->d_inode, nd->dentry, NULL,
1281                                 &nd->last);
1282 }
1283 static int ll_mkdir_raw(struct nameidata *nd, int mode)
1284 {
1285         return ll_mkdir_generic(nd->dentry->d_inode, &nd->last, mode, NULL);
1286 }
1287 static int ll_unlink_raw(struct nameidata *nd)
1288 {
1289         return ll_unlink_generic(nd->dentry->d_inode, nd->dentry, NULL,
1290                                  &nd->last);
1291 }
1292 #endif
1293
1294 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1295                     ll_dev_t rdev)
1296 {
1297         return ll_mknod_generic(dir, &dchild->d_name, mode,
1298                                 old_encode_dev(rdev), dchild);
1299 }
1300
1301 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1302 {
1303         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1304 }
1305 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1306 {
1307         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
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 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1314                       const char *oldname)
1315 {
1316         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1317 }
1318 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1319                    struct dentry *new_dentry)
1320 {
1321         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1322                                new_dentry);
1323 }
1324 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1325                      struct inode *new_dir, struct dentry *new_dentry)
1326 {
1327         int err;
1328         err = ll_rename_generic(old_dir, NULL,
1329                                  old_dentry, &old_dentry->d_name,
1330                                  new_dir, NULL, new_dentry,
1331                                  &new_dentry->d_name);
1332         if (!err) {
1333 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
1334                 if (!S_ISDIR(old_dentry->d_inode->i_mode))
1335 #endif
1336                         d_move(old_dentry, new_dentry);
1337         }
1338         return err;
1339 }
1340
1341 struct inode_operations ll_dir_inode_operations = {
1342 #ifdef HAVE_VFS_INTENT_PATCHES
1343         .link_raw           = ll_link_raw,
1344         .unlink_raw         = ll_unlink_raw,
1345         .symlink_raw        = ll_symlink_raw,
1346         .mkdir_raw          = ll_mkdir_raw,
1347         .rmdir_raw          = ll_rmdir_raw,
1348         .mknod_raw          = ll_mknod_raw,
1349         .rename_raw         = ll_rename_raw,
1350         .setattr            = ll_setattr,
1351         .setattr_raw        = ll_setattr_raw,
1352 #endif
1353         .mknod              = ll_mknod,
1354         .lookup             = ll_lookup_nd,
1355         .create             = ll_create_nd,
1356         /* We need all these non-raw things for NFSD, to not patch it. */
1357         .unlink             = ll_unlink,
1358         .mkdir              = ll_mkdir,
1359         .rmdir              = ll_rmdir,
1360         .symlink            = ll_symlink,
1361         .link               = ll_link,
1362         .rename             = ll_rename,
1363         .setattr            = ll_setattr,
1364         .getattr            = ll_getattr,
1365         .permission         = ll_inode_permission,
1366         .setxattr           = ll_setxattr,
1367         .getxattr           = ll_getxattr,
1368         .listxattr          = ll_listxattr,
1369         .removexattr        = ll_removexattr,
1370 };
1371
1372 struct inode_operations ll_special_inode_operations = {
1373 #ifdef HAVE_VFS_INTENT_PATCHES
1374         .setattr_raw    = ll_setattr_raw,
1375 #endif
1376         .setattr        = ll_setattr,
1377         .getattr        = ll_getattr,
1378         .permission     = ll_inode_permission,
1379         .setxattr       = ll_setxattr,
1380         .getxattr       = ll_getxattr,
1381         .listxattr      = ll_listxattr,
1382         .removexattr    = ll_removexattr,
1383 };