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 #ifdef DCACHE_LUSTRE_INVALID
 382                 dentry->d_flags &= ~DCACHE_LUSTRE_INVALID;
 383 #endif
 384                 unlock_dentry(dentry);
 385                 ll_dops_init(dentry, 0);
 386                 d_rehash_cond(dentry, 0); /* avoid taking dcache_lock inside */
 387                 spin_unlock(&dcache_lock);
 388                 spin_unlock(&ll_lookup_lock);
 389                 iput(inode);
 390                 CDEBUG(D_DENTRY, "alias dentry %.*s (%p) parent %p inode %p "
 391                        "refc %d\n", de->d_name.len, de->d_name.name, de,
 392                        de->d_parent, de->d_inode, atomic_read(&de->d_count));
 393                 return dentry;
 394         }
 395
 396         if (last_discon) {
 397                 CDEBUG(D_DENTRY, "Reuse disconnected dentry %p inode %p "
 398                         "refc %d\n", last_discon, last_discon->d_inode,
 399                         atomic_read(&last_discon->d_count));
 400                 dget_locked(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
 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
 434                 rc = ll_prep_inode(&inode, request, (*de)->d_sb);
 435                 if (rc)
 436                         RETURN(rc);
 437
 438                 CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
 439                        inode, inode->i_ino, inode->i_generation);
 440                 md_set_lock_data(sbi->ll_md_exp,
 441                                  &it->d.lustre.it_lock_handle, inode);
 442
 443                 /* We used to query real size from OSTs here, but actually
 444                    this is not needed. For stat() calls size would be updated
 445                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 446                    2.4 and
 447                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 448                    Everybody else who needs correct file size would call
 449                    cl_glimpse_size or some equivalent themselves anyway.
 450                    Also see bug 7198. */
 451
 452                 ll_dops_init(*de, 1);
 453                 *de = ll_find_alias(inode, *de);
 454                 if (*de != save) {
 455                         struct ll_dentry_data *lld = ll_d2d(*de);
 456
 457                         /* just make sure the ll_dentry_data is ready */
 458                         if (unlikely(lld == NULL)) {
 459                                 ll_set_dd(*de);
 460                                 lld = ll_d2d(*de);
 461                                 if (likely(lld != NULL))
 462                                         lld->lld_sa_generation = 0;
 463                         }
 464                 }
 465         } else {
 466                 ll_dops_init(*de, 1);
 467                 /* Check that parent has UPDATE lock. If there is none, we
 468                    cannot afford to hash this dentry (done by ll_d_add) as it
 469                    might get picked up later when UPDATE lock will appear */
 470                 if (ll_have_md_lock(parent, MDS_INODELOCK_UPDATE)) {
 471                         spin_lock(&dcache_lock);
 472                         ll_d_add(*de, NULL);
 473                         spin_unlock(&dcache_lock);
 474                 } else {
 475                         (*de)->d_inode = NULL;
 476                         /* We do not want to hash the dentry if don`t have a
 477                          * lock, but if this dentry is later used in d_move,
 478                          * we'd hit uninitialised list head d_hash, so we just
 479                          * do this to init d_hash field but leave dentry
 480                          * unhashed. (bug 10796). */
 481                         d_rehash(*de);
 482                         d_drop(*de);
 483                 }
 484         }
 485
 486         RETURN(0);
 487 }
 488
 489 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 490                                    struct lookup_intent *it, int lookup_flags)
 491 {
 492         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 493         struct dentry *save = dentry, *retval;
 494         struct ptlrpc_request *req = NULL;
 495         struct md_op_data *op_data;
 496         struct it_cb_data icbd;
 497         __u32 opc;
 498         int rc, first = 0;
 499         ENTRY;
 500
 501         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 502                 RETURN(ERR_PTR(-ENAMETOOLONG));
 503
 504         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 505                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 506                parent->i_generation, parent, LL_IT2STR(it));
 507
 508         if (d_mountpoint(dentry))
 509                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 510
 511         ll_frob_intent(&it, &lookup_it);
 512
 513         /* As do_lookup is called before follow_mount, root dentry may be left
 514          * not valid, revalidate it here. */
 515         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 516             (it->it_op & (IT_OPEN | IT_CREAT))) {
 517                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it);
 518                 if (rc)
 519                         RETURN(ERR_PTR(rc));
 520         }
 521
 522         if (it->it_op == IT_GETATTR) {
 523                 first = ll_statahead_enter(parent, &dentry, 1);
 524                 if (first >= 0) {
 525                         ll_statahead_exit(dentry, first);
 526                         if (first == 1)
 527                                 RETURN(retval = dentry);
 528                 }
 529         }
 530
 531         icbd.icbd_childp = &dentry;
 532         icbd.icbd_parent = parent;
 533
 534         if (it->it_op & IT_CREAT ||
 535             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 536                 opc = LUSTRE_OPC_CREATE;
 537         else
 538                 opc = LUSTRE_OPC_ANY;
 539
 540         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 541                                      dentry->d_name.len, lookup_flags, opc,
 542                                      NULL);
 543         if (IS_ERR(op_data))
 544                 RETURN((void *)op_data);
 545
 546         it->it_create_mode &= ~current->fs->umask;
 547
 548         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 549                             lookup_flags, &req, ll_md_blocking_ast, 0);
 550         ll_finish_md_op_data(op_data);
 551         if (rc < 0)
 552                 GOTO(out, retval = ERR_PTR(rc));
 553
 554         rc = ll_lookup_it_finish(req, it, &icbd);
 555         if (rc != 0) {
 556                 ll_intent_release(it);
 557                 GOTO(out, retval = ERR_PTR(rc));
 558         }
 559
 560         if (first == -EEXIST)
 561                 ll_statahead_mark(dentry);
 562
 563         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 564             !S_ISREG(dentry->d_inode->i_mode) &&
 565             !S_ISDIR(dentry->d_inode->i_mode)) {
 566                 ll_release_openhandle(dentry, it);
 567         }
 568         ll_lookup_finish_locks(it, dentry);
 569
 570         if (dentry == save)
 571                 GOTO(out, retval = NULL);
 572         else
 573                 GOTO(out, retval = dentry);
 574  out:
 575         if (req)
 576                 ptlrpc_req_finished(req);
 577         return retval;
 578 }
 579
 580 #ifdef HAVE_VFS_INTENT_PATCHES
 581 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 582                                    struct nameidata *nd)
 583 {
 584         struct dentry *de;
 585         ENTRY;
 586
 587         if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
 588                 de = ll_lookup_it(parent, dentry, &nd->intent, nd->flags);
 589         else
 590                 de = ll_lookup_it(parent, dentry, NULL, 0);
 591
 592         RETURN(de);
 593 }
 594 #else
 595 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 596                                         int lookup_flags)
 597 {
 598         struct lookup_intent *it;
 599
 600         OBD_ALLOC(it, sizeof(*it));
 601         if (!it)
 602                 return ERR_PTR(-ENOMEM);
 603
 604         if (lookup_flags & LOOKUP_OPEN) {
 605                 it->it_op = IT_OPEN;
 606                 if (lookup_flags & LOOKUP_CREATE)
 607                         it->it_op |= IT_CREAT;
 608                 it->it_create_mode = oit->create_mode;
 609                 it->it_flags = oit->flags;
 610         } else {
 611                 it->it_op = IT_GETATTR;
 612         }
 613
 614 #ifndef HAVE_FILE_IN_STRUCT_INTENT
 615                 /* Since there is no way to pass our intent to ll_file_open,
 616                  * just check the file is there. Actual open will be done
 617                  * in ll_file_open */
 618                 if (it->it_op & IT_OPEN)
 619                         it->it_op = IT_LOOKUP;
 620 #endif
 621
 622         return it;
 623 }
 624
 625 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 626                                    struct nameidata *nd)
 627 {
 628         struct dentry *de;
 629         ENTRY;
 630
 631         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 632                 struct lookup_intent *it;
 633
 634 #if defined(HAVE_FILE_IN_STRUCT_INTENT) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 635                 /* Did we came here from failed revalidate just to propagate
 636                  * its error? */
 637                 if (nd->flags & LOOKUP_OPEN)
 638                         if (IS_ERR(nd->intent.open.file))
 639                                 RETURN((struct dentry *)nd->intent.open.file);
 640 #endif
 641
 642                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 643                         it = ll_d2d(dentry)->lld_it;
 644                         ll_d2d(dentry)->lld_it = NULL;
 645                 } else {
 646                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 647                         if (IS_ERR(it))
 648                                 RETURN((struct dentry *)it);
 649                 }
 650
 651                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 652                 if (de)
 653                         dentry = de;
 654                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 655                         if (dentry->d_inode &&
 656                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 657 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 658                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 659                                         // We cannot call open here as it would
 660                                         // deadlock.
 661                                         ptlrpc_req_finished(
 662                                                        (struct ptlrpc_request *)
 663                                                           it->d.lustre.it_data);
 664                                 } else {
 665 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 666 /* 2.6.1[456] have a bug in open_namei() that forgets to check
 667  * nd->intent.open.file for error, so we need to return it as lookup's result
 668  * instead */
 669                                         struct file *filp;
 670                                         nd->intent.open.file->private_data = it;
 671                                         filp =lookup_instantiate_filp(nd,dentry,
 672                                                                       NULL);
 673                                         if (IS_ERR(filp)) {
 674                                                 if (de)
 675                                                         dput(de);
 676                                                 de = (struct dentry *) filp;
 677                                         }
 678 #else
 679                                         nd->intent.open.file->private_data = it;
 680                                         (void)lookup_instantiate_filp(nd,dentry,
 681                                                                       NULL);
 682 #endif
 683
 684                                 }
 685 #else /* HAVE_FILE_IN_STRUCT_INTENT */
 686                                 /* Release open handle as we have no way to
 687                                  * pass it to ll_file_open */
 688                                 ll_release_openhandle(dentry, it);
 689 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
 690                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 691                                 // XXX This can only reliably work on assumption
 692                                 // that there are NO hashed negative dentries.
 693                                 ll_d2d(dentry)->lld_it = it;
 694                                 it = NULL; /* Will be freed in ll_create_nd */
 695                                 /* We absolutely depend on ll_create_nd to be
 696                                  * called to not leak this intent and possible
 697                                  * data attached to it */
 698                         }
 699                 }
 700
 701                 if (it) {
 702                         ll_intent_release(it);
 703                         OBD_FREE(it, sizeof(*it));
 704                 }
 705         } else {
 706                 de = ll_lookup_it(parent, dentry, NULL, 0);
 707         }
 708
 709         RETURN(de);
 710 }
 711 #endif
 712
 713 /**
 714  * check new allocated inode, new inode shld not have any valid alias
 715  */
 716 static void ll_validate_new_inode(struct inode *new)
 717 {
 718         struct list_head *lp;
 719         struct dentry * dentry;
 720         int need_inval = 0;
 721         int in_recheck = 0;
 722
 723         if (list_empty(&new->i_dentry))
 724                 return;
 725 recheck:
 726         spin_lock(&dcache_lock);
 727         list_for_each(lp, &new->i_dentry) {
 728                 dentry = list_entry(lp, struct dentry, d_alias);
 729                 if (!d_unhashed(dentry) && !(dentry->d_flags & DCACHE_LUSTRE_INVALID)){
 730                         ll_dump_inode(new);
 731                         if (in_recheck)
 732                                 LBUG();
 733                 }
 734                 need_inval = 1;
 735         }
 736         spin_unlock(&dcache_lock);
 737
 738         if (need_inval && !in_recheck) {
 739                 /* kill all old inode's data pages */
 740                 truncate_inode_pages(new->i_mapping, 0);
 741
 742                 /* invalidate all dirent and recheck inode */
 743                 ll_unhash_aliases(new);
 744                 in_recheck = 1;
 745                 goto recheck;
 746         }
 747 }
 748
 749 /* We depend on "mode" being set with the proper file type/umask by now */
 750 static struct inode *ll_create_node(struct inode *dir, const char *name,
 751                                     int namelen, const void *data, int datalen,
 752                                     int mode, __u64 extra,
 753                                     struct lookup_intent *it)
 754 {
 755         struct inode *inode = NULL;
 756         struct ptlrpc_request *request = NULL;
 757         struct ll_sb_info *sbi = ll_i2sbi(dir);
 758         int rc;
 759         ENTRY;
 760
 761         LASSERT(it && it->d.lustre.it_disposition);
 762
 763         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 764         request = it->d.lustre.it_data;
 765         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 766         rc = ll_prep_inode(&inode, request, dir->i_sb);
 767         if (rc)
 768                 GOTO(out, inode = ERR_PTR(rc));
 769
 770         ll_validate_new_inode(inode);
 771
 772         /* We asked for a lock on the directory, but were granted a
 773          * lock on the inode.  Since we finally have an inode pointer,
 774          * stuff it in the lock. */
 775         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 776                inode, inode->i_ino, inode->i_generation);
 777         md_set_lock_data(sbi->ll_md_exp,
 778                          &it->d.lustre.it_lock_handle, inode);
 779         EXIT;
 780  out:
 781         ptlrpc_req_finished(request);
 782         return inode;
 783 }
 784
 785 /*
 786  * By the time this is called, we already have created the directory cache
 787  * entry for the new file, but it is so far negative - it has no inode.
 788  *
 789  * We defer creating the OBD object(s) until open, to keep the intent and
 790  * non-intent code paths similar, and also because we do not have the MDS
 791  * inode number before calling ll_create_node() (which is needed for LOV),
 792  * so we would need to do yet another RPC to the MDS to store the LOV EA
 793  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 794  * lmm_size in datalen (the MDS still has code which will handle that).
 795  *
 796  * If the create succeeds, we fill in the inode information
 797  * with d_instantiate().
 798  */
 799 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 800                         struct lookup_intent *it)
 801 {
 802         struct inode *inode;
 803         int rc = 0;
 804         ENTRY;
 805
 806         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 807                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 808                dir->i_generation, dir, LL_IT2STR(it));
 809
 810         rc = it_open_error(DISP_OPEN_CREATE, it);
 811         if (rc)
 812                 RETURN(rc);
 813
 814         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 815                                NULL, 0, mode, 0, it);
 816         if (IS_ERR(inode)) {
 817                 RETURN(PTR_ERR(inode));
 818         }
 819
 820         /* it might been set during parent dir revalidation */
 821         dentry->d_flags &= ~DCACHE_LUSTRE_INVALID;
 822         d_instantiate(dentry, inode);
 823         /* Negative dentry may be unhashed if parent does not have UPDATE lock,
 824          * but some callers, e.g. do_coredump, expect dentry to be hashed after
 825          * successful create. Hash it here. */
 826         spin_lock(&dcache_lock);
 827         if (d_unhashed(dentry))
 828                 d_rehash_cond(dentry, 0);
 829         spin_unlock(&dcache_lock);
 830         RETURN(0);
 831 }
 832
 833 static void ll_update_times(struct ptlrpc_request *request,
 834                             struct inode *inode)
 835 {
 836         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 837                                                        &RMF_MDT_BODY);
 838
 839         LASSERT(body);
 840         /* mtime is always updated with ctime, but can be set in past.
 841            As write and utime(2) may happen within 1 second, and utime's
 842            mtime has a priority over write's one, so take mtime from mds
 843            for the same ctimes. */
 844         if (body->valid & OBD_MD_FLCTIME &&
 845             body->ctime >= LTIME_S(inode->i_ctime)) {
 846                 LTIME_S(inode->i_ctime) = body->ctime;
 847
 848                 if (body->valid & OBD_MD_FLMTIME) {
 849                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
 850                                "to "LPU64"\n", inode->i_ino,
 851                                LTIME_S(inode->i_mtime), body->mtime);
 852                         LTIME_S(inode->i_mtime) = body->mtime;
 853                 }
 854         }
 855 }
 856
 857 static int ll_new_node(struct inode *dir, struct qstr *name,
 858                        const char *tgt, int mode, int rdev,
 859                        struct dentry *dchild, __u32 opc)
 860 {
 861         struct ptlrpc_request *request = NULL;
 862         struct md_op_data *op_data;
 863         struct inode *inode = NULL;
 864         struct ll_sb_info *sbi = ll_i2sbi(dir);
 865         int tgt_len = 0;
 866         int err;
 867
 868         ENTRY;
 869         if (unlikely(tgt != NULL))
 870                 tgt_len = strlen(tgt) + 1;
 871
 872         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 873                                      name->len, 0, opc, NULL);
 874         if (IS_ERR(op_data))
 875                 GOTO(err_exit, err = PTR_ERR(op_data));
 876
 877         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 878                         current->fsuid, current->fsgid,
 879                         cfs_curproc_cap_pack(), rdev, &request);
 880         ll_finish_md_op_data(op_data);
 881         if (err)
 882                 GOTO(err_exit, err);
 883
 884         ll_update_times(request, dir);
 885
 886         if (dchild) {
 887                 err = ll_prep_inode(&inode, request, dchild->d_sb);
 888                 if (err)
 889                      GOTO(err_exit, err);
 890
 891                 d_drop(dchild);
 892                 d_instantiate(dchild, inode);
 893                 EXIT;
 894         }
 895 err_exit:
 896         ptlrpc_req_finished(request);
 897
 898         return err;
 899 }
 900
 901 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 902                             unsigned rdev, struct dentry *dchild)
 903 {
 904         int err;
 905         ENTRY;
 906
 907         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 908                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 909                mode, rdev);
 910
 911         mode &= ~current->fs->umask;
 912
 913         switch (mode & S_IFMT) {
 914         case 0:
 915                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 916         case S_IFREG:
 917         case S_IFCHR:
 918         case S_IFBLK:
 919         case S_IFIFO:
 920         case S_IFSOCK:
 921                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 922                                   LUSTRE_OPC_MKNOD);
 923                 break;
 924         case S_IFDIR:
 925                 err = -EPERM;
 926                 break;
 927         default:
 928                 err = -EINVAL;
 929         }
 930         RETURN(err);
 931 }
 932
 933 #ifndef HAVE_VFS_INTENT_PATCHES
 934 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 935                         int mode, struct nameidata *nd)
 936 {
 937         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 938         int rc;
 939
 940         if (!it)
 941                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 942
 943         ll_d2d(dentry)->lld_it = NULL;
 944
 945         /* Was there an error? Propagate it! */
 946         if (it->d.lustre.it_status) {
 947                 rc = it->d.lustre.it_status;
 948                 goto out;
 949         }
 950
 951         rc = ll_create_it(dir, dentry, mode, it);
 952 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 953         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 954                 nd->intent.open.file->private_data = it;
 955                 lookup_instantiate_filp(nd, dentry, NULL);
 956         }
 957 #else
 958         ll_release_openhandle(dentry,it);
 959 #endif
 960
 961 out:
 962         ll_intent_release(it);
 963         OBD_FREE(it, sizeof(*it));
 964
 965         return rc;
 966 }
 967 #else
 968 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 969                         int mode, struct nameidata *nd)
 970 {
 971         if (!nd || !nd->intent.d.lustre.it_disposition)
 972                 /* No saved request? Just mknod the file */
 973                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 974
 975         return ll_create_it(dir, dentry, mode, &nd->intent);
 976 }
 977 #endif
 978
 979 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 980                               const char *tgt, struct dentry *dchild)
 981 {
 982         int err;
 983         ENTRY;
 984
 985         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 986                name->len, name->name, dir->i_ino, dir->i_generation,
 987                dir, 3000, tgt);
 988
 989         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 990                           0, dchild, LUSTRE_OPC_SYMLINK);
 991         RETURN(err);
 992 }
 993
 994 static int ll_link_generic(struct inode *src,  struct inode *dir,
 995                            struct qstr *name, struct dentry *dchild)
 996 {
 997         struct ll_sb_info *sbi = ll_i2sbi(dir);
 998         struct ptlrpc_request *request = NULL;
 999         struct md_op_data *op_data;
1000         int err;
1001
1002         ENTRY;
1003         CDEBUG(D_VFSTRACE,
1004                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
1005                src->i_ino, src->i_generation, src, dir->i_ino,
1006                dir->i_generation, dir, name->len, name->name);
1007
1008         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1009                                      0, LUSTRE_OPC_ANY, NULL);
1010         if (IS_ERR(op_data))
1011                 RETURN(PTR_ERR(op_data));
1012
1013         err = md_link(sbi->ll_md_exp, op_data, &request);
1014         ll_finish_md_op_data(op_data);
1015         if (err)
1016                 GOTO(out, err);
1017         if (dchild)
1018                 d_drop(dchild);
1019
1020         ll_update_times(request, dir);
1021         EXIT;
1022 out:
1023         ptlrpc_req_finished(request);
1024         RETURN(err);
1025 }
1026
1027 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
1028                             int mode, struct dentry *dchild)
1029
1030 {
1031         int err;
1032         ENTRY;
1033
1034         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1035                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1036
1037         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
1038         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
1039
1040         RETURN(err);
1041 }
1042
1043 /* Try to find the child dentry by its name.
1044    If found, put the result fid into @fid. */
1045 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
1046                              struct lu_fid *fid)
1047 {
1048         struct dentry *parent, *child;
1049
1050         parent = list_entry(dir->i_dentry.next, struct dentry, d_alias);
1051         child = d_lookup(parent, name);
1052         if (child) {
1053                 if (child->d_inode)
1054                         *fid = *ll_inode2fid(child->d_inode);
1055                 dput(child);
1056         }
1057 }
1058
1059 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1060                             struct dentry *dchild, struct qstr *name)
1061 {
1062         struct ptlrpc_request *request = NULL;
1063         struct md_op_data *op_data;
1064         int rc;
1065         ENTRY;
1066
1067         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1068                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1069
1070         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1071                 RETURN(-EBUSY);
1072
1073         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1074                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1075         if (IS_ERR(op_data))
1076                 RETURN(PTR_ERR(op_data));
1077
1078         ll_get_child_fid(dir, name, &op_data->op_fid3);
1079         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1080         ll_finish_md_op_data(op_data);
1081         if (rc == 0)
1082                 ll_update_times(request, dir);
1083         ptlrpc_req_finished(request);
1084         RETURN(rc);
1085 }
1086
1087 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1088 {
1089         struct mdt_body *body;
1090         struct lov_mds_md *eadata;
1091         struct lov_stripe_md *lsm = NULL;
1092         struct obd_trans_info oti = { 0 };
1093         struct obdo *oa;
1094         struct obd_capa *oc = NULL;
1095         int rc;
1096         ENTRY;
1097
1098         /* req is swabbed so this is safe */
1099         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1100         if (!(body->valid & OBD_MD_FLEASIZE))
1101                 RETURN(0);
1102
1103         if (body->eadatasize == 0) {
1104                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1105                 GOTO(out, rc = -EPROTO);
1106         }
1107
1108         /* The MDS sent back the EA because we unlinked the last reference
1109          * to this file. Use this EA to unlink the objects on the OST.
1110          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1111          * check it is complete and sensible. */
1112         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1113                                               body->eadatasize);
1114         LASSERT(eadata != NULL);
1115
1116         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1117         if (rc < 0) {
1118                 CERROR("obd_unpackmd: %d\n", rc);
1119                 GOTO(out, rc);
1120         }
1121         LASSERT(rc >= sizeof(*lsm));
1122
1123         rc = obd_checkmd(ll_i2dtexp(dir), ll_i2mdexp(dir), lsm);
1124         if (rc)
1125                 GOTO(out_free_memmd, rc);
1126
1127         OBDO_ALLOC(oa);
1128         if (oa == NULL)
1129                 GOTO(out_free_memmd, rc = -ENOMEM);
1130
1131         oa->o_id = lsm->lsm_object_id;
1132         oa->o_gr = lsm->lsm_object_gr;
1133         oa->o_mode = body->mode & S_IFMT;
1134         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1135
1136         if (body->valid & OBD_MD_FLCOOKIE) {
1137                 oa->o_valid |= OBD_MD_FLCOOKIE;
1138                 oti.oti_logcookies =
1139                         req_capsule_server_sized_get(&request->rq_pill,
1140                                                      &RMF_LOGCOOKIES,
1141                                                    sizeof(struct llog_cookie) *
1142                                                      lsm->lsm_stripe_count);
1143                 if (oti.oti_logcookies == NULL) {
1144                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1145                         body->valid &= ~OBD_MD_FLCOOKIE;
1146                 }
1147         }
1148
1149         if (body->valid & OBD_MD_FLOSSCAPA) {
1150                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1151                 if (rc)
1152                         GOTO(out_free_memmd, rc);
1153         }
1154
1155         rc = obd_destroy(ll_i2dtexp(dir), oa, lsm, &oti, ll_i2mdexp(dir), oc);
1156         capa_put(oc);
1157         OBDO_FREE(oa);
1158         if (rc)
1159                 CERROR("obd destroy objid "LPX64" error %d\n",
1160                        lsm->lsm_object_id, rc);
1161  out_free_memmd:
1162         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1163  out:
1164         return rc;
1165 }
1166
1167 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1168                              struct dentry *dchild, struct qstr *name)
1169 {
1170         struct ptlrpc_request *request = NULL;
1171         struct md_op_data *op_data;
1172         int rc;
1173         ENTRY;
1174         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1175                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1176
1177         /*
1178          * XXX: unlink bind mountpoint maybe call to here,
1179          * just check it as vfs_unlink does.
1180          */
1181         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1182                 RETURN(-EBUSY);
1183
1184         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1185                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1186         if (IS_ERR(op_data))
1187                 RETURN(PTR_ERR(op_data));
1188
1189         ll_get_child_fid(dir, name, &op_data->op_fid3);
1190         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1191         ll_finish_md_op_data(op_data);
1192         if (rc)
1193                 GOTO(out, rc);
1194
1195         ll_update_times(request, dir);
1196
1197         rc = ll_objects_destroy(request, dir);
1198  out:
1199         ptlrpc_req_finished(request);
1200         RETURN(rc);
1201 }
1202
1203 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1204                              struct dentry *src_dchild, struct qstr *src_name,
1205                              struct inode *tgt, struct dentry *tgt_dparent,
1206                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1207 {
1208         struct ptlrpc_request *request = NULL;
1209         struct ll_sb_info *sbi = ll_i2sbi(src);
1210         struct md_op_data *op_data;
1211         int err;
1212         ENTRY;
1213         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1214                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1215                src->i_ino, src->i_generation, src, tgt_name->len,
1216                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1217
1218         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1219             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1220                 RETURN(-EBUSY);
1221
1222         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1223                                      LUSTRE_OPC_ANY, NULL);
1224         if (IS_ERR(op_data))
1225                 RETURN(PTR_ERR(op_data));
1226
1227         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1228         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1229         err = md_rename(sbi->ll_md_exp, op_data,
1230                         src_name->name, src_name->len,
1231                         tgt_name->name, tgt_name->len, &request);
1232         ll_finish_md_op_data(op_data);
1233         if (!err) {
1234                 ll_update_times(request, src);
1235                 ll_update_times(request, tgt);
1236                 err = ll_objects_destroy(request, src);
1237         }
1238
1239         ptlrpc_req_finished(request);
1240
1241         RETURN(err);
1242 }
1243
1244 #ifdef HAVE_VFS_INTENT_PATCHES
1245 static int ll_mknod_raw(struct nameidata *nd, int mode, dev_t rdev)
1246 {
1247         return ll_mknod_generic(nd->dentry->d_inode, &nd->last, mode,rdev,NULL);
1248 }
1249 static int ll_rename_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1250 {
1251         return ll_rename_generic(srcnd->dentry->d_inode, srcnd->dentry,
1252                                  NULL, &srcnd->last,
1253                                  tgtnd->dentry->d_inode, tgtnd->dentry,
1254                                  NULL, &tgtnd->last);
1255 }
1256 static int ll_link_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1257 {
1258         return ll_link_generic(srcnd->dentry->d_inode, tgtnd->dentry->d_inode,
1259                                &tgtnd->last, NULL);
1260 }
1261 static int ll_symlink_raw(struct nameidata *nd, const char *tgt)
1262 {
1263         return ll_symlink_generic(nd->dentry->d_inode, &nd->last, tgt, NULL);
1264 }
1265 static int ll_rmdir_raw(struct nameidata *nd)
1266 {
1267         return ll_rmdir_generic(nd->dentry->d_inode, nd->dentry, NULL,
1268                                 &nd->last);
1269 }
1270 static int ll_mkdir_raw(struct nameidata *nd, int mode)
1271 {
1272         return ll_mkdir_generic(nd->dentry->d_inode, &nd->last, mode, NULL);
1273 }
1274 static int ll_unlink_raw(struct nameidata *nd)
1275 {
1276         return ll_unlink_generic(nd->dentry->d_inode, nd->dentry, NULL,
1277                                  &nd->last);
1278 }
1279 #endif
1280
1281 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1282                     ll_dev_t rdev)
1283 {
1284         return ll_mknod_generic(dir, &dchild->d_name, mode,
1285                                 old_encode_dev(rdev), dchild);
1286 }
1287
1288 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1289 {
1290         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1291 }
1292 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1293 {
1294         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1295 }
1296 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1297 {
1298         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1299 }
1300 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1301                       const char *oldname)
1302 {
1303         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1304 }
1305 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1306                    struct dentry *new_dentry)
1307 {
1308         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1309                                new_dentry);
1310 }
1311 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1312                      struct inode *new_dir, struct dentry *new_dentry)
1313 {
1314         int err;
1315         err = ll_rename_generic(old_dir, NULL,
1316                                  old_dentry, &old_dentry->d_name,
1317                                  new_dir, NULL, new_dentry,
1318                                  &new_dentry->d_name);
1319         if (!err) {
1320 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
1321                 if (!S_ISDIR(old_dentry->d_inode->i_mode))
1322 #endif
1323                         d_move(old_dentry, new_dentry);
1324         }
1325         return err;
1326 }
1327
1328 struct inode_operations ll_dir_inode_operations = {
1329 #ifdef HAVE_VFS_INTENT_PATCHES
1330         .link_raw           = ll_link_raw,
1331         .unlink_raw         = ll_unlink_raw,
1332         .symlink_raw        = ll_symlink_raw,
1333         .mkdir_raw          = ll_mkdir_raw,
1334         .rmdir_raw          = ll_rmdir_raw,
1335         .mknod_raw          = ll_mknod_raw,
1336         .rename_raw         = ll_rename_raw,
1337         .setattr            = ll_setattr,
1338         .setattr_raw        = ll_setattr_raw,
1339 #endif
1340         .mknod              = ll_mknod,
1341         .lookup             = ll_lookup_nd,
1342         .create             = ll_create_nd,
1343         /* We need all these non-raw things for NFSD, to not patch it. */
1344         .unlink             = ll_unlink,
1345         .mkdir              = ll_mkdir,
1346         .rmdir              = ll_rmdir,
1347         .symlink            = ll_symlink,
1348         .link               = ll_link,
1349         .rename             = ll_rename,
1350         .setattr            = ll_setattr,
1351         .getattr            = ll_getattr,
1352         .permission         = ll_inode_permission,
1353         .setxattr           = ll_setxattr,
1354         .getxattr           = ll_getxattr,
1355         .listxattr          = ll_listxattr,
1356         .removexattr        = ll_removexattr,
1357 };
1358
1359 struct inode_operations ll_special_inode_operations = {
1360 #ifdef HAVE_VFS_INTENT_PATCHES
1361         .setattr_raw    = ll_setattr_raw,
1362 #endif
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 };