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
  45 #define DEBUG_SUBSYSTEM S_LLITE
  46
  47 #include <obd_support.h>
  48 #include <lustre_fid.h>
  49 #include <lustre_lite.h>
  50 #include <lustre_dlm.h>
  51 #include <lustre_ver.h>
  52 #include <lustre_mdc.h>
  53 #include "llite_internal.h"
  54
  55 /*
  56  * Check if we have something mounted at the named dchild.
  57  * In such a case there would always be dentry present.
  58  */
  59 static int ll_d_mountpoint(struct dentry *dparent, struct dentry *dchild,
  60                            struct qstr *name)
  61 {
  62         int mounted = 0;
  63
  64         if (unlikely(dchild)) {
  65                 mounted = d_mountpoint(dchild);
  66         } else if (dparent) {
  67                 dchild = d_lookup(dparent, name);
  68                 if (dchild) {
  69                         mounted = d_mountpoint(dchild);
  70                         dput(dchild);
  71                 }
  72         }
  73         return mounted;
  74 }
  75
  76 int ll_unlock(__u32 mode, struct lustre_handle *lockh)
  77 {
  78         ENTRY;
  79
  80         ldlm_lock_decref(lockh, mode);
  81
  82         RETURN(0);
  83 }
  84
  85
  86 /* called from iget5_locked->find_inode() under inode_lock spinlock */
  87 static int ll_test_inode(struct inode *inode, void *opaque)
  88 {
  89         struct ll_inode_info *lli = ll_i2info(inode);
  90         struct lustre_md     *md = opaque;
  91
  92         if (unlikely(!(md->body->valid & OBD_MD_FLID))) {
  93                 CERROR("MDS body missing FID\n");
  94                 return 0;
  95         }
  96
  97         if (!lu_fid_eq(&lli->lli_fid, &md->body->fid1))
  98                 return 0;
  99
 100         return 1;
 101 }
 102
 103 static int ll_set_inode(struct inode *inode, void *opaque)
 104 {
 105         struct ll_inode_info *lli = ll_i2info(inode);
 106         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
 107
 108         if (unlikely(!(body->valid & OBD_MD_FLID))) {
 109                 CERROR("MDS body missing FID\n");
 110                 return -EINVAL;
 111         }
 112
 113         lli->lli_fid = body->fid1;
 114         return 0;
 115 }
 116
 117
 118 /*
 119  * Get an inode by inode number (already instantiated by the intent lookup).
 120  * Returns inode or NULL
 121  */
 122 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 123                       struct lustre_md *md)
 124 {
 125         struct inode         *inode;
 126         ENTRY;
 127
 128         LASSERT(hash != 0);
 129         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
 130
 131         if (inode) {
 132                 if (inode->i_state & I_NEW) {
 133                         int rc;
 134
 135                         ll_read_inode2(inode, md);
 136                         rc = cl_inode_init(inode, md);
 137                         if (rc != 0) {
 138                                 md->lsm = NULL;
 139                                 make_bad_inode(inode);
 140                                 unlock_new_inode(inode);
 141                                 iput(inode);
 142                                 inode = ERR_PTR(rc);
 143                         } else
 144                                 unlock_new_inode(inode);
 145                 } else if (!(inode->i_state & (I_FREEING | I_CLEAR)))
 146                                 ll_update_inode(inode, md);
 147                 CDEBUG(D_VFSTRACE, "got inode: %p for "DFID"\n",
 148                        inode, PFID(&md->body->fid1));
 149         }
 150         RETURN(inode);
 151 }
 152
 153 static void ll_drop_negative_dentry(struct inode *dir)
 154 {
 155         struct dentry *dentry, *tmp_alias, *tmp_subdir;
 156
 157         cfs_spin_lock(&ll_lookup_lock);
 158         spin_lock(&dcache_lock);
 159 restart:
 160         list_for_each_entry_safe(dentry, tmp_alias,
 161                                  &dir->i_dentry,d_alias) {
 162                 if (!list_empty(&dentry->d_subdirs)) {
 163                         struct dentry *child;
 164                         list_for_each_entry_safe(child, tmp_subdir,
 165                                                  &dentry->d_subdirs,
 166                                                  d_child) {
 167                                 /* XXX Print some debug here? */
 168                                 if (!child->d_inode)
 169                                 /* Negative dentry. If we were
 170                                    dropping dcache lock, go
 171                                    throught the list again */
 172                                         if (ll_drop_dentry(child))
 173                                                 goto restart;
 174                         }
 175                 }
 176         }
 177         spin_unlock(&dcache_lock);
 178         cfs_spin_unlock(&ll_lookup_lock);
 179 }
 180
 181
 182 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 183                        void *data, int flag)
 184 {
 185         int rc;
 186         struct lustre_handle lockh;
 187         ENTRY;
 188
 189         switch (flag) {
 190         case LDLM_CB_BLOCKING:
 191                 ldlm_lock2handle(lock, &lockh);
 192                 rc = ldlm_cli_cancel(&lockh);
 193                 if (rc < 0) {
 194                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 195                         RETURN(rc);
 196                 }
 197                 break;
 198         case LDLM_CB_CANCELING: {
 199                 struct inode *inode = ll_inode_from_lock(lock);
 200                 struct ll_inode_info *lli;
 201                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 202                 struct lu_fid *fid;
 203
 204                 /* Invalidate all dentries associated with this inode */
 205                 if (inode == NULL)
 206                         break;
 207
 208                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
 209                 if ((bits & MDS_INODELOCK_LOOKUP) &&
 210                     ll_have_md_lock(inode, MDS_INODELOCK_LOOKUP))
 211                         bits &= ~MDS_INODELOCK_LOOKUP;
 212                 if ((bits & MDS_INODELOCK_UPDATE) &&
 213                     ll_have_md_lock(inode, MDS_INODELOCK_UPDATE))
 214                         bits &= ~MDS_INODELOCK_UPDATE;
 215                 if ((bits & MDS_INODELOCK_OPEN) &&
 216                     ll_have_md_lock(inode, MDS_INODELOCK_OPEN))
 217                         bits &= ~MDS_INODELOCK_OPEN;
 218
 219                 fid = ll_inode2fid(inode);
 220                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
 221                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
 222                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
 223                         LDLM_ERROR(lock, "data mismatch with object "
 224                                    DFID" (%p)", PFID(fid), inode);
 225                 }
 226
 227                 if (bits & MDS_INODELOCK_OPEN) {
 228                         int flags = 0;
 229                         switch (lock->l_req_mode) {
 230                         case LCK_CW:
 231                                 flags = FMODE_WRITE;
 232                                 break;
 233                         case LCK_PR:
 234                                 flags = FMODE_EXEC;
 235                                 break;
 236                         case LCK_CR:
 237                                 flags = FMODE_READ;
 238                                 break;
 239                         default:
 240                                 CERROR("Unexpected lock mode for OPEN lock "
 241                                        "%d, inode %ld\n", lock->l_req_mode,
 242                                        inode->i_ino);
 243                         }
 244                         ll_md_real_close(inode, flags);
 245                 }
 246
 247                 lli = ll_i2info(inode);
 248                 if (bits & MDS_INODELOCK_UPDATE)
 249                         lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 250
 251                 if (S_ISDIR(inode->i_mode) &&
 252                      (bits & MDS_INODELOCK_UPDATE)) {
 253                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 254                                inode->i_ino);
 255                         truncate_inode_pages(inode->i_mapping, 0);
 256                         ll_drop_negative_dentry(inode);
 257                 }
 258
 259                 if ((bits & MDS_INODELOCK_LOOKUP) &&
 260                     !cfs_list_empty(&lli->lli_sa_dentry)) {
 261                         struct ll_dentry_data *lld, *next;
 262
 263                         cfs_spin_lock(&lli->lli_sa_lock);
 264                         cfs_list_for_each_entry_safe(lld, next,
 265                                                      &lli->lli_sa_dentry,
 266                                                      lld_sa_alias)
 267                                 cfs_list_del_init(&lld->lld_sa_alias);
 268                         cfs_spin_unlock(&lli->lli_sa_lock);
 269                 }
 270
 271                 if (inode->i_sb->s_root &&
 272                     inode != inode->i_sb->s_root->d_inode &&
 273                     (bits & MDS_INODELOCK_LOOKUP))
 274                         ll_unhash_aliases(inode);
 275                 iput(inode);
 276                 break;
 277         }
 278         default:
 279                 LBUG();
 280         }
 281
 282         RETURN(0);
 283 }
 284
 285 __u32 ll_i2suppgid(struct inode *i)
 286 {
 287         if (cfs_curproc_is_in_groups(i->i_gid))
 288                 return (__u32)i->i_gid;
 289         else
 290                 return (__u32)(-1);
 291 }
 292
 293 /* Pack the required supplementary groups into the supplied groups array.
 294  * If we don't need to use the groups from the target inode(s) then we
 295  * instead pack one or more groups from the user's supplementary group
 296  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 297 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 298 {
 299 #if 0
 300         int i;
 301 #endif
 302
 303         LASSERT(i1 != NULL);
 304         LASSERT(suppgids != NULL);
 305
 306         suppgids[0] = ll_i2suppgid(i1);
 307
 308         if (i2)
 309                 suppgids[1] = ll_i2suppgid(i2);
 310                 else
 311                         suppgids[1] = -1;
 312
 313 #if 0
 314         for (i = 0; i < current_ngroups; i++) {
 315                 if (suppgids[0] == -1) {
 316                         if (current_groups[i] != suppgids[1])
 317                                 suppgids[0] = current_groups[i];
 318                         continue;
 319                 }
 320                 if (suppgids[1] == -1) {
 321                         if (current_groups[i] != suppgids[0])
 322                                 suppgids[1] = current_groups[i];
 323                         continue;
 324                 }
 325                 break;
 326         }
 327 #endif
 328 }
 329
 330 static void ll_d_add(struct dentry *de, struct inode *inode)
 331 {
 332         CDEBUG(D_DENTRY, "adding inode %p to dentry %p\n", inode, de);
 333         /* d_instantiate */
 334         if (!list_empty(&de->d_alias)) {
 335                 spin_unlock(&dcache_lock);
 336                 CERROR("dentry %.*s %p alias next %p, prev %p\n",
 337                        de->d_name.len, de->d_name.name, de,
 338                        de->d_alias.next, de->d_alias.prev);
 339                 LBUG();
 340         }
 341         if (inode)
 342                 list_add(&de->d_alias, &inode->i_dentry);
 343         de->d_inode = inode;
 344
 345         /* d_rehash */
 346         if (!d_unhashed(de)) {
 347                 spin_unlock(&dcache_lock);
 348                 CERROR("dentry %.*s %p hash next %p\n",
 349                        de->d_name.len, de->d_name.name, de, de->d_hash.next);
 350                 LBUG();
 351         }
 352         d_rehash_cond(de, 0);
 353 }
 354
 355 /* Search "inode"'s alias list for a dentry that has the same name and parent
 356  * as de.  If found, return it.  If not found, return de.
 357  * Lustre can't use d_add_unique because don't unhash aliases for directory
 358  * in ll_revalidate_it.  After revaliadate inode will be have hashed aliases
 359  * and it triggers BUG_ON in d_instantiate_unique (bug #10954).
 360  */
 361 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *de)
 362 {
 363         struct list_head *tmp;
 364         struct dentry *dentry;
 365         struct dentry *last_discon = NULL;
 366
 367         cfs_spin_lock(&ll_lookup_lock);
 368         spin_lock(&dcache_lock);
 369         list_for_each(tmp, &inode->i_dentry) {
 370                 dentry = list_entry(tmp, struct dentry, d_alias);
 371
 372                 /* We are called here with 'de' already on the aliases list. */
 373                 if (unlikely(dentry == de)) {
 374                         CERROR("whoops\n");
 375                         continue;
 376                 }
 377
 378                 if (dentry->d_flags & DCACHE_DISCONNECTED) {
 379                         LASSERT(last_discon == NULL);
 380                         last_discon = dentry;
 381                         continue;
 382                 }
 383
 384                 if (dentry->d_parent != de->d_parent)
 385                         continue;
 386
 387                 if (dentry->d_name.hash != de->d_name.hash)
 388                         continue;
 389
 390                 if (dentry->d_name.len != de->d_name.len)
 391                         continue;
 392
 393                 if (memcmp(dentry->d_name.name, de->d_name.name,
 394                            de->d_name.len) != 0)
 395                         continue;
 396
 397                 dget_locked(dentry);
 398                 lock_dentry(dentry);
 399                 __d_drop(dentry);
 400                 unlock_dentry(dentry);
 401                 ll_dops_init(dentry, 0);
 402                 d_rehash_cond(dentry, 0); /* avoid taking dcache_lock inside */
 403                 spin_unlock(&dcache_lock);
 404                 cfs_spin_unlock(&ll_lookup_lock);
 405                 iput(inode);
 406                 CDEBUG(D_DENTRY, "alias dentry %.*s (%p) parent %p inode %p "
 407                        "refc %d\n", de->d_name.len, de->d_name.name, de,
 408                        de->d_parent, de->d_inode, atomic_read(&de->d_count));
 409                 return dentry;
 410         }
 411
 412         if (last_discon) {
 413                 CDEBUG(D_DENTRY, "Reuse disconnected dentry %p inode %p "
 414                         "refc %d\n", last_discon, last_discon->d_inode,
 415                         atomic_read(&last_discon->d_count));
 416                 dget_locked(last_discon);
 417                 lock_dentry(last_discon);
 418                 last_discon->d_flags |= DCACHE_LUSTRE_INVALID;
 419                 unlock_dentry(last_discon);
 420                 spin_unlock(&dcache_lock);
 421                 cfs_spin_unlock(&ll_lookup_lock);
 422                 ll_dops_init(last_discon, 1);
 423                 d_rehash(de);
 424                 d_move(last_discon, de);
 425                 iput(inode);
 426                 return last_discon;
 427         }
 428         lock_dentry(de);
 429         de->d_flags |= DCACHE_LUSTRE_INVALID;
 430         unlock_dentry(de);
 431         ll_d_add(de, inode);
 432
 433         spin_unlock(&dcache_lock);
 434         cfs_spin_unlock(&ll_lookup_lock);
 435
 436         return de;
 437 }
 438
 439 void ll_lookup_it_alias(struct dentry **de, struct inode *inode, __u32 bits)
 440 {
 441         struct dentry *save = *de;
 442         ENTRY;
 443
 444         ll_dops_init(*de, 1);
 445         *de = ll_find_alias(inode, *de);
 446         if (*de != save) {
 447                 struct ll_dentry_data *lld = ll_d2d(*de);
 448
 449                 /* just make sure the ll_dentry_data is ready */
 450                 if (unlikely(lld == NULL))
 451                         ll_dops_init(*de, 1);
 452         }
 453         /* we have lookup look - unhide dentry */
 454         if (bits & MDS_INODELOCK_LOOKUP) {
 455                 lock_dentry(*de);
 456                 (*de)->d_flags &= ~DCACHE_LUSTRE_INVALID;
 457                 unlock_dentry(*de);
 458         }
 459         EXIT;
 460 }
 461
 462 int ll_lookup_it_finish(struct ptlrpc_request *request,
 463                         struct lookup_intent *it, void *data)
 464 {
 465         struct it_cb_data *icbd = data;
 466         struct dentry **de = icbd->icbd_childp;
 467         struct inode *parent = icbd->icbd_parent;
 468         struct ll_sb_info *sbi = ll_i2sbi(parent);
 469         struct inode *inode = NULL;
 470         int rc;
 471         ENTRY;
 472
 473         /* NB 1 request reference will be taken away by ll_intent_lock()
 474          * when I return */
 475         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 476                 __u32 bits;
 477
 478                 rc = ll_prep_inode(&inode, request, (*de)->d_sb);
 479                 if (rc)
 480                         RETURN(rc);
 481
 482                 CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
 483                        inode, inode->i_ino, inode->i_generation);
 484                 md_set_lock_data(sbi->ll_md_exp,
 485                                  &it->d.lustre.it_lock_handle, inode, &bits);
 486
 487                 if (icbd->bits != NULL)
 488                         *icbd->bits = bits;
 489                 if (icbd->icbd_alias != NULL) {
 490                         *icbd->icbd_alias = inode;
 491                         RETURN(0);
 492                 }
 493
 494                 /* We used to query real size from OSTs here, but actually
 495                    this is not needed. For stat() calls size would be updated
 496                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 497                    2.4 and
 498                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 499                    Everybody else who needs correct file size would call
 500                    cl_glimpse_size or some equivalent themselves anyway.
 501                    Also see bug 7198. */
 502                 ll_lookup_it_alias(de, inode, bits);
 503         } else {
 504                 ll_dops_init(*de, 1);
 505                 /* Check that parent has UPDATE lock. If there is none, we
 506                    cannot afford to hash this dentry (done by ll_d_add) as it
 507                    might get picked up later when UPDATE lock will appear */
 508                 if (ll_have_md_lock(parent, MDS_INODELOCK_UPDATE)) {
 509                         spin_lock(&dcache_lock);
 510                         ll_d_add(*de, NULL);
 511                         spin_unlock(&dcache_lock);
 512                 } else {
 513                         /* negative lookup - and don't have update lock to
 514                          * parent */
 515                         lock_dentry(*de);
 516                         (*de)->d_flags |= DCACHE_LUSTRE_INVALID;
 517                         unlock_dentry(*de);
 518
 519                         (*de)->d_inode = NULL;
 520                         /* We do not want to hash the dentry if don`t have a
 521                          * lock, but if this dentry is later used in d_move,
 522                          * we'd hit uninitialised list head d_hash, so we just
 523                          * do this to init d_hash field but leave dentry
 524                          * unhashed. (bug 10796). */
 525                         d_rehash(*de);
 526                         d_drop(*de);
 527                 }
 528         }
 529
 530         RETURN(0);
 531 }
 532
 533 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 534                                    struct lookup_intent *it, int lookup_flags)
 535 {
 536         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 537         struct dentry *save = dentry, *retval;
 538         struct ptlrpc_request *req = NULL;
 539         struct md_op_data *op_data;
 540         struct it_cb_data icbd;
 541         __u32 opc;
 542         int rc, first = 0;
 543         ENTRY;
 544
 545         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 546                 RETURN(ERR_PTR(-ENAMETOOLONG));
 547
 548         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 549                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 550                parent->i_generation, parent, LL_IT2STR(it));
 551
 552         if (d_mountpoint(dentry))
 553                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 554
 555         ll_frob_intent(&it, &lookup_it);
 556
 557         /* As do_lookup is called before follow_mount, root dentry may be left
 558          * not valid, revalidate it here. */
 559         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 560             (it->it_op & (IT_OPEN | IT_CREAT))) {
 561                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it);
 562                 if (rc)
 563                         RETURN(ERR_PTR(rc));
 564         }
 565
 566         if (it->it_op == IT_GETATTR) {
 567                 first = ll_statahead_enter(parent, &dentry, 1);
 568                 if (first >= 0) {
 569                         ll_statahead_exit(parent, dentry, first);
 570                         if (first == 1)
 571                                 RETURN(retval = dentry);
 572                 }
 573         }
 574
 575         icbd.icbd_childp = &dentry;
 576         icbd.icbd_parent = parent;
 577         icbd.icbd_alias  = NULL;
 578         icbd.bits        = NULL;
 579
 580         if (it->it_op & IT_CREAT ||
 581             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 582                 opc = LUSTRE_OPC_CREATE;
 583         else
 584                 opc = LUSTRE_OPC_ANY;
 585
 586         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 587                                      dentry->d_name.len, lookup_flags, opc,
 588                                      NULL);
 589         if (IS_ERR(op_data))
 590                 RETURN((void *)op_data);
 591
 592         it->it_create_mode &= ~current->fs->umask;
 593
 594         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 595                             lookup_flags, &req, ll_md_blocking_ast, 0);
 596         ll_finish_md_op_data(op_data);
 597         if (rc < 0)
 598                 GOTO(out, retval = ERR_PTR(rc));
 599
 600         rc = ll_lookup_it_finish(req, it, &icbd);
 601         if (rc != 0) {
 602                 ll_intent_release(it);
 603                 GOTO(out, retval = ERR_PTR(rc));
 604         }
 605
 606         if (first == -EEXIST)
 607                 ll_statahead_mark(parent, dentry);
 608
 609         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 610             !S_ISREG(dentry->d_inode->i_mode) &&
 611             !S_ISDIR(dentry->d_inode->i_mode)) {
 612                 ll_release_openhandle(dentry, it);
 613         }
 614         ll_lookup_finish_locks(it, dentry);
 615
 616         if (dentry == save)
 617                 GOTO(out, retval = NULL);
 618         else
 619                 GOTO(out, retval = dentry);
 620  out:
 621         if (req)
 622                 ptlrpc_req_finished(req);
 623         return retval;
 624 }
 625
 626 #ifdef HAVE_VFS_INTENT_PATCHES
 627 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 628                                    struct nameidata *nd)
 629 {
 630         struct dentry *de;
 631         ENTRY;
 632
 633         if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
 634                 de = ll_lookup_it(parent, dentry, &nd->intent, nd->flags);
 635         else
 636                 de = ll_lookup_it(parent, dentry, NULL, 0);
 637
 638         RETURN(de);
 639 }
 640 #else
 641 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 642                                         int lookup_flags)
 643 {
 644         struct lookup_intent *it;
 645
 646         OBD_ALLOC(it, sizeof(*it));
 647         if (!it)
 648                 return ERR_PTR(-ENOMEM);
 649
 650         if (lookup_flags & LOOKUP_OPEN) {
 651                 it->it_op = IT_OPEN;
 652                 if (lookup_flags & LOOKUP_CREATE)
 653                         it->it_op |= IT_CREAT;
 654                 it->it_create_mode = oit->create_mode;
 655                 it->it_flags = oit->flags;
 656         } else {
 657                 it->it_op = IT_GETATTR;
 658         }
 659
 660 #ifndef HAVE_FILE_IN_STRUCT_INTENT
 661                 /* Since there is no way to pass our intent to ll_file_open,
 662                  * just check the file is there. Actual open will be done
 663                  * in ll_file_open */
 664                 if (it->it_op & IT_OPEN)
 665                         it->it_op = IT_LOOKUP;
 666 #endif
 667
 668         return it;
 669 }
 670
 671 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 672                                    struct nameidata *nd)
 673 {
 674         struct dentry *de;
 675         ENTRY;
 676
 677         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 678                 struct lookup_intent *it;
 679
 680 #if defined(HAVE_FILE_IN_STRUCT_INTENT) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 681                 /* Did we came here from failed revalidate just to propagate
 682                  * its error? */
 683                 if (nd->flags & LOOKUP_OPEN)
 684                         if (IS_ERR(nd->intent.open.file))
 685                                 RETURN((struct dentry *)nd->intent.open.file);
 686 #endif
 687
 688                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 689                         it = ll_d2d(dentry)->lld_it;
 690                         ll_d2d(dentry)->lld_it = NULL;
 691                 } else {
 692                         if ((nd->flags & LOOKUP_CREATE ) && !(nd->flags & LOOKUP_OPEN)) {
 693                                 /* We are sure this is new dentry, so we need to create
 694                                    our private data and set the dentry ops */
 695                                 ll_dops_init(dentry, 1);
 696                                 RETURN(NULL);
 697                         }
 698                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 699                         if (IS_ERR(it))
 700                                 RETURN((struct dentry *)it);
 701                 }
 702
 703                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 704                 if (de)
 705                         dentry = de;
 706                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 707                         if (dentry->d_inode &&
 708                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 709 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 710                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 711                                         // We cannot call open here as it would
 712                                         // deadlock.
 713                                         ptlrpc_req_finished(
 714                                                        (struct ptlrpc_request *)
 715                                                           it->d.lustre.it_data);
 716                                 } else {
 717 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 718 /* 2.6.1[456] have a bug in open_namei() that forgets to check
 719  * nd->intent.open.file for error, so we need to return it as lookup's result
 720  * instead */
 721                                         struct file *filp;
 722                                         nd->intent.open.file->private_data = it;
 723                                         filp =lookup_instantiate_filp(nd,dentry,
 724                                                                       NULL);
 725                                         if (IS_ERR(filp)) {
 726                                                 if (de)
 727                                                         dput(de);
 728                                                 de = (struct dentry *) filp;
 729                                         }
 730 #else
 731                                         nd->intent.open.file->private_data = it;
 732                                         (void)lookup_instantiate_filp(nd,dentry,
 733                                                                       NULL);
 734 #endif
 735
 736                                 }
 737 #else /* HAVE_FILE_IN_STRUCT_INTENT */
 738                                 /* Release open handle as we have no way to
 739                                  * pass it to ll_file_open */
 740                                 ll_release_openhandle(dentry, it);
 741 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
 742                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 743                                 // XXX This can only reliably work on assumption
 744                                 // that there are NO hashed negative dentries.
 745                                 ll_d2d(dentry)->lld_it = it;
 746                                 it = NULL; /* Will be freed in ll_create_nd */
 747                                 /* We absolutely depend on ll_create_nd to be
 748                                  * called to not leak this intent and possible
 749                                  * data attached to it */
 750                         }
 751                 }
 752
 753                 if (it) {
 754                         ll_intent_release(it);
 755                         OBD_FREE(it, sizeof(*it));
 756                 }
 757         } else {
 758                 de = ll_lookup_it(parent, dentry, NULL, 0);
 759         }
 760
 761         RETURN(de);
 762 }
 763 #endif
 764
 765 /* We depend on "mode" being set with the proper file type/umask by now */
 766 static struct inode *ll_create_node(struct inode *dir, const char *name,
 767                                     int namelen, const void *data, int datalen,
 768                                     int mode, __u64 extra,
 769                                     struct lookup_intent *it)
 770 {
 771         struct inode *inode = NULL;
 772         struct ptlrpc_request *request = NULL;
 773         struct ll_sb_info *sbi = ll_i2sbi(dir);
 774         int rc;
 775         ENTRY;
 776
 777         LASSERT(it && it->d.lustre.it_disposition);
 778
 779         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 780         request = it->d.lustre.it_data;
 781         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 782         rc = ll_prep_inode(&inode, request, dir->i_sb);
 783         if (rc)
 784                 GOTO(out, inode = ERR_PTR(rc));
 785
 786         LASSERT(list_empty(&inode->i_dentry));
 787
 788         /* We asked for a lock on the directory, but were granted a
 789          * lock on the inode.  Since we finally have an inode pointer,
 790          * stuff it in the lock. */
 791         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 792                inode, inode->i_ino, inode->i_generation);
 793         md_set_lock_data(sbi->ll_md_exp,
 794                          &it->d.lustre.it_lock_handle, inode, NULL);
 795         EXIT;
 796  out:
 797         ptlrpc_req_finished(request);
 798         return inode;
 799 }
 800
 801 /*
 802  * By the time this is called, we already have created the directory cache
 803  * entry for the new file, but it is so far negative - it has no inode.
 804  *
 805  * We defer creating the OBD object(s) until open, to keep the intent and
 806  * non-intent code paths similar, and also because we do not have the MDS
 807  * inode number before calling ll_create_node() (which is needed for LOV),
 808  * so we would need to do yet another RPC to the MDS to store the LOV EA
 809  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 810  * lmm_size in datalen (the MDS still has code which will handle that).
 811  *
 812  * If the create succeeds, we fill in the inode information
 813  * with d_instantiate().
 814  */
 815 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 816                         struct lookup_intent *it)
 817 {
 818         struct inode *inode;
 819         int rc = 0;
 820         ENTRY;
 821
 822         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 823                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 824                dir->i_generation, dir, LL_IT2STR(it));
 825
 826         rc = it_open_error(DISP_OPEN_CREATE, it);
 827         if (rc)
 828                 RETURN(rc);
 829
 830         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 831                                NULL, 0, mode, 0, it);
 832         if (IS_ERR(inode)) {
 833                 RETURN(PTR_ERR(inode));
 834         }
 835
 836         d_instantiate(dentry, inode);
 837         /* Negative dentry may be unhashed if parent does not have UPDATE lock,
 838          * but some callers, e.g. do_coredump, expect dentry to be hashed after
 839          * successful create. Hash it here. */
 840         spin_lock(&dcache_lock);
 841         if (d_unhashed(dentry))
 842                 d_rehash_cond(dentry, 0);
 843         spin_unlock(&dcache_lock);
 844         RETURN(0);
 845 }
 846
 847 static void ll_update_times(struct ptlrpc_request *request,
 848                             struct inode *inode)
 849 {
 850         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 851                                                        &RMF_MDT_BODY);
 852
 853         LASSERT(body);
 854         if (body->valid & OBD_MD_FLMTIME &&
 855             body->mtime > LTIME_S(inode->i_mtime)) {
 856                 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to "LPU64"\n",
 857                        inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
 858                 LTIME_S(inode->i_mtime) = body->mtime;
 859         }
 860         if (body->valid & OBD_MD_FLCTIME &&
 861             body->ctime > LTIME_S(inode->i_ctime))
 862                 LTIME_S(inode->i_ctime) = body->ctime;
 863 }
 864
 865 static int ll_new_node(struct inode *dir, struct qstr *name,
 866                        const char *tgt, int mode, int rdev,
 867                        struct dentry *dchild, __u32 opc)
 868 {
 869         struct ptlrpc_request *request = NULL;
 870         struct md_op_data *op_data;
 871         struct inode *inode = NULL;
 872         struct ll_sb_info *sbi = ll_i2sbi(dir);
 873         int tgt_len = 0;
 874         int err;
 875
 876         ENTRY;
 877         if (unlikely(tgt != NULL))
 878                 tgt_len = strlen(tgt) + 1;
 879
 880         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 881                                      name->len, 0, opc, NULL);
 882         if (IS_ERR(op_data))
 883                 GOTO(err_exit, err = PTR_ERR(op_data));
 884
 885         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 886                         cfs_curproc_fsuid(), cfs_curproc_fsgid(),
 887                         cfs_curproc_cap_pack(), rdev, &request);
 888         ll_finish_md_op_data(op_data);
 889         if (err)
 890                 GOTO(err_exit, err);
 891
 892         ll_update_times(request, dir);
 893
 894         if (dchild) {
 895                 err = ll_prep_inode(&inode, request, dchild->d_sb);
 896                 if (err)
 897                      GOTO(err_exit, err);
 898
 899                 d_drop(dchild);
 900                 d_instantiate(dchild, inode);
 901                 EXIT;
 902         }
 903 err_exit:
 904         ptlrpc_req_finished(request);
 905
 906         return err;
 907 }
 908
 909 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 910                             unsigned rdev, struct dentry *dchild)
 911 {
 912         int err;
 913         ENTRY;
 914
 915         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 916                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 917                mode, rdev);
 918
 919         mode &= ~current->fs->umask;
 920
 921         switch (mode & S_IFMT) {
 922         case 0:
 923                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 924         case S_IFREG:
 925         case S_IFCHR:
 926         case S_IFBLK:
 927         case S_IFIFO:
 928         case S_IFSOCK:
 929                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 930                                   LUSTRE_OPC_MKNOD);
 931                 break;
 932         case S_IFDIR:
 933                 err = -EPERM;
 934                 break;
 935         default:
 936                 err = -EINVAL;
 937         }
 938         RETURN(err);
 939 }
 940
 941 #ifndef HAVE_VFS_INTENT_PATCHES
 942 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 943                         int mode, struct nameidata *nd)
 944 {
 945         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 946         int rc;
 947
 948         if (!it)
 949                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 950
 951         ll_d2d(dentry)->lld_it = NULL;
 952
 953         /* Was there an error? Propagate it! */
 954         if (it->d.lustre.it_status) {
 955                 rc = it->d.lustre.it_status;
 956                 goto out;
 957         }
 958
 959         rc = ll_create_it(dir, dentry, mode, it);
 960 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 961         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 962                 nd->intent.open.file->private_data = it;
 963                 lookup_instantiate_filp(nd, dentry, NULL);
 964         }
 965 #else
 966         ll_release_openhandle(dentry,it);
 967 #endif
 968
 969 out:
 970         ll_intent_release(it);
 971         OBD_FREE(it, sizeof(*it));
 972
 973         return rc;
 974 }
 975 #else
 976 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 977                         int mode, struct nameidata *nd)
 978 {
 979         if (!nd || !nd->intent.d.lustre.it_disposition)
 980                 /* No saved request? Just mknod the file */
 981                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 982
 983         return ll_create_it(dir, dentry, mode, &nd->intent);
 984 }
 985 #endif
 986
 987 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 988                               const char *tgt, struct dentry *dchild)
 989 {
 990         int err;
 991         ENTRY;
 992
 993         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 994                name->len, name->name, dir->i_ino, dir->i_generation,
 995                dir, 3000, tgt);
 996
 997         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 998                           0, dchild, LUSTRE_OPC_SYMLINK);
 999         RETURN(err);
1000 }
1001
1002 static int ll_link_generic(struct inode *src,  struct inode *dir,
1003                            struct qstr *name, struct dentry *dchild)
1004 {
1005         struct ll_sb_info *sbi = ll_i2sbi(dir);
1006         struct ptlrpc_request *request = NULL;
1007         struct md_op_data *op_data;
1008         int err;
1009
1010         ENTRY;
1011         CDEBUG(D_VFSTRACE,
1012                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
1013                src->i_ino, src->i_generation, src, dir->i_ino,
1014                dir->i_generation, dir, name->len, name->name);
1015
1016         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1017                                      0, LUSTRE_OPC_ANY, NULL);
1018         if (IS_ERR(op_data))
1019                 RETURN(PTR_ERR(op_data));
1020
1021         err = md_link(sbi->ll_md_exp, op_data, &request);
1022         ll_finish_md_op_data(op_data);
1023         if (err)
1024                 GOTO(out, err);
1025         if (dchild)
1026                 d_drop(dchild);
1027
1028         ll_update_times(request, dir);
1029         EXIT;
1030 out:
1031         ptlrpc_req_finished(request);
1032         RETURN(err);
1033 }
1034
1035 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
1036                             int mode, struct dentry *dchild)
1037
1038 {
1039         int err;
1040         ENTRY;
1041
1042         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1043                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1044
1045         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
1046         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
1047
1048         RETURN(err);
1049 }
1050
1051 /* Try to find the child dentry by its name.
1052    If found, put the result fid into @fid. */
1053 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
1054                              struct lu_fid *fid)
1055 {
1056         struct dentry *parent, *child;
1057
1058         parent = list_entry(dir->i_dentry.next, struct dentry, d_alias);
1059         child = d_lookup(parent, name);
1060         if (child) {
1061                 if (child->d_inode)
1062                         *fid = *ll_inode2fid(child->d_inode);
1063                 dput(child);
1064         }
1065 }
1066
1067 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1068                             struct dentry *dchild, struct qstr *name)
1069 {
1070         struct ptlrpc_request *request = NULL;
1071         struct md_op_data *op_data;
1072         int rc;
1073         ENTRY;
1074
1075         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1076                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1077
1078         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1079                 RETURN(-EBUSY);
1080
1081         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1082                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1083         if (IS_ERR(op_data))
1084                 RETURN(PTR_ERR(op_data));
1085
1086         ll_get_child_fid(dir, name, &op_data->op_fid3);
1087         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1088         ll_finish_md_op_data(op_data);
1089         if (rc == 0)
1090                 ll_update_times(request, dir);
1091         ptlrpc_req_finished(request);
1092         RETURN(rc);
1093 }
1094
1095 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1096 {
1097         struct mdt_body *body;
1098         struct lov_mds_md *eadata;
1099         struct lov_stripe_md *lsm = NULL;
1100         struct obd_trans_info oti = { 0 };
1101         struct obdo *oa;
1102         struct obd_capa *oc = NULL;
1103         int rc;
1104         ENTRY;
1105
1106         /* req is swabbed so this is safe */
1107         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1108         if (!(body->valid & OBD_MD_FLEASIZE))
1109                 RETURN(0);
1110
1111         if (body->eadatasize == 0) {
1112                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1113                 GOTO(out, rc = -EPROTO);
1114         }
1115
1116         /* The MDS sent back the EA because we unlinked the last reference
1117          * to this file. Use this EA to unlink the objects on the OST.
1118          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1119          * check it is complete and sensible. */
1120         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1121                                               body->eadatasize);
1122         LASSERT(eadata != NULL);
1123
1124         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1125         if (rc < 0) {
1126                 CERROR("obd_unpackmd: %d\n", rc);
1127                 GOTO(out, rc);
1128         }
1129         LASSERT(rc >= sizeof(*lsm));
1130
1131         OBDO_ALLOC(oa);
1132         if (oa == NULL)
1133                 GOTO(out_free_memmd, rc = -ENOMEM);
1134
1135         oa->o_id = lsm->lsm_object_id;
1136         oa->o_gr = lsm->lsm_object_gr;
1137         oa->o_mode = body->mode & S_IFMT;
1138         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1139
1140         if (body->valid & OBD_MD_FLCOOKIE) {
1141                 oa->o_valid |= OBD_MD_FLCOOKIE;
1142                 oti.oti_logcookies =
1143                         req_capsule_server_sized_get(&request->rq_pill,
1144                                                      &RMF_LOGCOOKIES,
1145                                                    sizeof(struct llog_cookie) *
1146                                                      lsm->lsm_stripe_count);
1147                 if (oti.oti_logcookies == NULL) {
1148                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1149                         body->valid &= ~OBD_MD_FLCOOKIE;
1150                 }
1151         }
1152
1153         if (body->valid & OBD_MD_FLOSSCAPA) {
1154                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1155                 if (rc)
1156                         GOTO(out_free_memmd, rc);
1157         }
1158
1159         rc = obd_destroy(ll_i2dtexp(dir), oa, lsm, &oti, ll_i2mdexp(dir), oc);
1160         capa_put(oc);
1161         OBDO_FREE(oa);
1162         if (rc)
1163                 CERROR("obd destroy objid "LPX64" error %d\n",
1164                        lsm->lsm_object_id, rc);
1165  out_free_memmd:
1166         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1167  out:
1168         return rc;
1169 }
1170
1171 /* ll_unlink_generic() doesn't update the inode with the new link count.
1172  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
1173  * is any lock existing. They will recycle dentries and inodes based upon locks
1174  * too. b=20433 */
1175 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1176                              struct dentry *dchild, struct qstr *name)
1177 {
1178         struct ptlrpc_request *request = NULL;
1179         struct md_op_data *op_data;
1180         int rc;
1181         ENTRY;
1182         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1183                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1184
1185         /*
1186          * XXX: unlink bind mountpoint maybe call to here,
1187          * just check it as vfs_unlink does.
1188          */
1189         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1190                 RETURN(-EBUSY);
1191
1192         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1193                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1194         if (IS_ERR(op_data))
1195                 RETURN(PTR_ERR(op_data));
1196
1197         ll_get_child_fid(dir, name, &op_data->op_fid3);
1198         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1199         ll_finish_md_op_data(op_data);
1200         if (rc)
1201                 GOTO(out, rc);
1202
1203         ll_update_times(request, dir);
1204
1205         rc = ll_objects_destroy(request, dir);
1206  out:
1207         ptlrpc_req_finished(request);
1208         RETURN(rc);
1209 }
1210
1211 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1212                              struct dentry *src_dchild, struct qstr *src_name,
1213                              struct inode *tgt, struct dentry *tgt_dparent,
1214                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1215 {
1216         struct ptlrpc_request *request = NULL;
1217         struct ll_sb_info *sbi = ll_i2sbi(src);
1218         struct md_op_data *op_data;
1219         int err;
1220         ENTRY;
1221         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1222                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1223                src->i_ino, src->i_generation, src, tgt_name->len,
1224                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1225
1226         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1227             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1228                 RETURN(-EBUSY);
1229
1230         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1231                                      LUSTRE_OPC_ANY, NULL);
1232         if (IS_ERR(op_data))
1233                 RETURN(PTR_ERR(op_data));
1234
1235         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1236         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1237         err = md_rename(sbi->ll_md_exp, op_data,
1238                         src_name->name, src_name->len,
1239                         tgt_name->name, tgt_name->len, &request);
1240         ll_finish_md_op_data(op_data);
1241         if (!err) {
1242                 ll_update_times(request, src);
1243                 ll_update_times(request, tgt);
1244                 err = ll_objects_destroy(request, src);
1245         }
1246
1247         ptlrpc_req_finished(request);
1248
1249         RETURN(err);
1250 }
1251
1252 #ifdef HAVE_VFS_INTENT_PATCHES
1253 static int ll_mknod_raw(struct nameidata *nd, int mode, dev_t rdev)
1254 {
1255         return ll_mknod_generic(nd->dentry->d_inode, &nd->last, mode,rdev,NULL);
1256 }
1257 static int ll_rename_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1258 {
1259         return ll_rename_generic(srcnd->dentry->d_inode, srcnd->dentry,
1260                                  NULL, &srcnd->last,
1261                                  tgtnd->dentry->d_inode, tgtnd->dentry,
1262                                  NULL, &tgtnd->last);
1263 }
1264 static int ll_link_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1265 {
1266         return ll_link_generic(srcnd->dentry->d_inode, tgtnd->dentry->d_inode,
1267                                &tgtnd->last, NULL);
1268 }
1269 static int ll_symlink_raw(struct nameidata *nd, const char *tgt)
1270 {
1271         return ll_symlink_generic(nd->dentry->d_inode, &nd->last, tgt, NULL);
1272 }
1273 static int ll_rmdir_raw(struct nameidata *nd)
1274 {
1275         return ll_rmdir_generic(nd->dentry->d_inode, nd->dentry, NULL,
1276                                 &nd->last);
1277 }
1278 static int ll_mkdir_raw(struct nameidata *nd, int mode)
1279 {
1280         return ll_mkdir_generic(nd->dentry->d_inode, &nd->last, mode, NULL);
1281 }
1282 static int ll_unlink_raw(struct nameidata *nd)
1283 {
1284         return ll_unlink_generic(nd->dentry->d_inode, nd->dentry, NULL,
1285                                  &nd->last);
1286 }
1287 #endif
1288
1289 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1290                     ll_dev_t rdev)
1291 {
1292         return ll_mknod_generic(dir, &dchild->d_name, mode,
1293                                 old_encode_dev(rdev), dchild);
1294 }
1295
1296 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1297 {
1298         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1299 }
1300 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1301 {
1302         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1303 }
1304 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1305 {
1306         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1307 }
1308 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1309                       const char *oldname)
1310 {
1311         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1312 }
1313 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1314                    struct dentry *new_dentry)
1315 {
1316         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1317                                new_dentry);
1318 }
1319 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1320                      struct inode *new_dir, struct dentry *new_dentry)
1321 {
1322         int err;
1323         err = ll_rename_generic(old_dir, NULL,
1324                                  old_dentry, &old_dentry->d_name,
1325                                  new_dir, NULL, new_dentry,
1326                                  &new_dentry->d_name);
1327         if (!err) {
1328 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
1329                 if (!S_ISDIR(old_dentry->d_inode->i_mode))
1330 #endif
1331                         d_move(old_dentry, new_dentry);
1332         }
1333         return err;
1334 }
1335
1336 struct inode_operations ll_dir_inode_operations = {
1337 #ifdef HAVE_VFS_INTENT_PATCHES
1338         .link_raw           = ll_link_raw,
1339         .unlink_raw         = ll_unlink_raw,
1340         .symlink_raw        = ll_symlink_raw,
1341         .mkdir_raw          = ll_mkdir_raw,
1342         .rmdir_raw          = ll_rmdir_raw,
1343         .mknod_raw          = ll_mknod_raw,
1344         .rename_raw         = ll_rename_raw,
1345         .setattr            = ll_setattr,
1346         .setattr_raw        = ll_setattr_raw,
1347 #endif
1348         .mknod              = ll_mknod,
1349         .lookup             = ll_lookup_nd,
1350         .create             = ll_create_nd,
1351         /* We need all these non-raw things for NFSD, to not patch it. */
1352         .unlink             = ll_unlink,
1353         .mkdir              = ll_mkdir,
1354         .rmdir              = ll_rmdir,
1355         .symlink            = ll_symlink,
1356         .link               = ll_link,
1357         .rename             = ll_rename,
1358         .setattr            = ll_setattr,
1359         .getattr            = ll_getattr,
1360         .permission         = ll_inode_permission,
1361         .setxattr           = ll_setxattr,
1362         .getxattr           = ll_getxattr,
1363         .listxattr          = ll_listxattr,
1364         .removexattr        = ll_removexattr,
1365 };
1366
1367 struct inode_operations ll_special_inode_operations = {
1368 #ifdef HAVE_VFS_INTENT_PATCHES
1369         .setattr_raw    = ll_setattr_raw,
1370 #endif
1371         .setattr        = ll_setattr,
1372         .getattr        = ll_getattr,
1373         .permission     = ll_inode_permission,
1374         .setxattr       = ll_setxattr,
1375         .getxattr       = ll_getxattr,
1376         .listxattr      = ll_listxattr,
1377         .removexattr    = ll_removexattr,
1378 };