lustre/llite/namei.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (c) 2002, 2003 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include <linux/fs.h>
  23 #include <linux/sched.h>
  24 #include <linux/mm.h>
  25 #include <linux/smp_lock.h>
  26 #include <linux/quotaops.h>
  27 #include <linux/highmem.h>
  28 #include <linux/pagemap.h>
  29
  30 #define DEBUG_SUBSYSTEM S_LLITE
  31
  32 #include <obd_support.h>
  33 #include <lustre_fid.h>
  34 #include <lustre_lite.h>
  35 #include <lustre_dlm.h>
  36 #include <lustre_ver.h>
  37 #include <lustre_mdc.h>
  38 #include "llite_internal.h"
  39
  40 /* methods */
  41 extern struct dentry_operations ll_d_ops;
  42
  43 /*
  44  * Check if we have something mounted at the named dchild.
  45  * In such a case there would always be dentry present.
  46  */
  47 static int ll_d_mountpoint(struct dentry *dparent, struct dentry *dchild,
  48                            struct qstr *name)
  49 {
  50         int mounted = 0;
  51
  52         if (unlikely(dchild)) {
  53                 mounted = d_mountpoint(dchild);
  54         } else if (dparent) {
  55                 dchild = d_lookup(dparent, name);
  56                 if (dchild) {
  57                         mounted = d_mountpoint(dchild);
  58                         dput(dchild);
  59                 }
  60         }
  61         return mounted;
  62 }
  63
  64 int ll_unlock(__u32 mode, struct lustre_handle *lockh)
  65 {
  66         ENTRY;
  67
  68         ldlm_lock_decref(lockh, mode);
  69
  70         RETURN(0);
  71 }
  72
  73 /*
  74  * Get an inode by inode number (already instantiated by the intent lookup).
  75  * Returns inode or NULL
  76  */
  77 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  78 struct inode *ll_iget(struct super_block *sb, ino_t hash,
  79                       struct lustre_md *md)
  80 {
  81         struct ll_inode_info *lli;
  82         struct inode *inode;
  83         LASSERT(hash != 0);
  84
  85         inode = iget_locked(sb, hash);
  86         if (inode) {
  87                 if (inode->i_state & I_NEW) {
  88                         lli = ll_i2info(inode);
  89                         ll_read_inode2(inode, md);
  90                         unlock_new_inode(inode);
  91                 } else {
  92                         if (!(inode->i_state & (I_FREEING | I_CLEAR)))
  93                                 ll_update_inode(inode, md);
  94                 }
  95                 CDEBUG(D_VFSTRACE, "inode: %lu/%u(%p)\n",
  96                        inode->i_ino, inode->i_generation, inode);
  97         }
  98
  99         return inode;
 100 }
 101 #else
 102 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 103                       struct lustre_md *md)
 104 {
 105         struct inode *inode;
 106         LASSERT(hash != 0);
 107
 108         inode = iget4(sb, hash, NULL, md);
 109         if (inode) {
 110                 if (!(inode->i_state & (I_FREEING | I_CLEAR)))
 111                         ll_update_inode(inode, md);
 112
 113                 CDEBUG(D_VFSTRACE, "inode: %lu/%u(%p)\n",
 114                        inode->i_ino, inode->i_generation, inode);
 115         }
 116         return inode;
 117 }
 118 #endif
 119
 120 static void ll_drop_negative_dentry(struct inode *dir)
 121 {
 122         struct dentry *dentry, *tmp_alias, *tmp_subdir;
 123
 124         spin_lock(&dcache_lock);
 125 restart:
 126         list_for_each_entry_safe(dentry, tmp_alias,
 127                                  &dir->i_dentry,d_alias) {
 128                 if (!list_empty(&dentry->d_subdirs)) {
 129                         struct dentry *child;
 130                         list_for_each_entry_safe(child, tmp_subdir,
 131                                                  &dentry->d_subdirs,
 132                                                  d_child) {
 133                                 /* XXX Print some debug here? */
 134                                 if (!child->d_inode)
 135                                 /* Negative dentry. If we were
 136                                    dropping dcache lock, go
 137                                    throught the list again */
 138                                         if (ll_drop_dentry(child))
 139                                                 goto restart;
 140                         }
 141                 }
 142         }
 143         spin_unlock(&dcache_lock);
 144 }
 145
 146
 147 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 148                        void *data, int flag)
 149 {
 150         int rc;
 151         struct lustre_handle lockh;
 152         ENTRY;
 153
 154         switch (flag) {
 155         case LDLM_CB_BLOCKING:
 156                 ldlm_lock2handle(lock, &lockh);
 157                 rc = ldlm_cli_cancel(&lockh);
 158                 if (rc < 0) {
 159                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 160                         RETURN(rc);
 161                 }
 162                 break;
 163         case LDLM_CB_CANCELING: {
 164                 struct inode *inode = ll_inode_from_lock(lock);
 165                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 166                 struct lu_fid *fid;
 167
 168                 /* Invalidate all dentries associated with this inode */
 169                 if (inode == NULL)
 170                         break;
 171
 172                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
 173                 if ((bits & MDS_INODELOCK_LOOKUP) &&
 174                     ll_have_md_lock(inode, MDS_INODELOCK_LOOKUP))
 175                         bits &= ~MDS_INODELOCK_LOOKUP;
 176                 if ((bits & MDS_INODELOCK_UPDATE) &&
 177                     ll_have_md_lock(inode, MDS_INODELOCK_UPDATE))
 178                         bits &= ~MDS_INODELOCK_UPDATE;
 179                 if ((bits & MDS_INODELOCK_OPEN) &&
 180                     ll_have_md_lock(inode, MDS_INODELOCK_OPEN))
 181                         bits &= ~MDS_INODELOCK_OPEN;
 182
 183                 fid = ll_inode2fid(inode);
 184                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
 185                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
 186                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
 187                         LDLM_ERROR(lock, "data mismatch with object "
 188                                    DFID" (%p)", PFID(fid), inode);
 189                 }
 190
 191                 if (bits & MDS_INODELOCK_OPEN) {
 192                         int flags = 0;
 193                         switch (lock->l_req_mode) {
 194                         case LCK_CW:
 195                                 flags = FMODE_WRITE;
 196                                 break;
 197                         case LCK_PR:
 198                                 flags = FMODE_EXEC;
 199                                 break;
 200                         case LCK_CR:
 201                                 flags = FMODE_READ;
 202                                 break;
 203                         default:
 204                                 CERROR("Unexpected lock mode for OPEN lock "
 205                                        "%d, inode %ld\n", lock->l_req_mode,
 206                                        inode->i_ino);
 207                         }
 208                         ll_md_real_close(inode, flags);
 209                 }
 210
 211                 if (bits & MDS_INODELOCK_UPDATE)
 212                         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 213
 214                 if (S_ISDIR(inode->i_mode) &&
 215                      (bits & MDS_INODELOCK_UPDATE)) {
 216                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 217                                inode->i_ino);
 218                         truncate_inode_pages(inode->i_mapping, 0);
 219                         ll_drop_negative_dentry(inode);
 220                 }
 221
 222                 if (inode->i_sb->s_root &&
 223                     inode != inode->i_sb->s_root->d_inode &&
 224                     (bits & MDS_INODELOCK_LOOKUP))
 225                         ll_unhash_aliases(inode);
 226                 iput(inode);
 227                 break;
 228         }
 229         default:
 230                 LBUG();
 231         }
 232
 233         RETURN(0);
 234 }
 235
 236 /* Pack the required supplementary groups into the supplied groups array.
 237  * If we don't need to use the groups from the target inode(s) then we
 238  * instead pack one or more groups from the user's supplementary group
 239  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 240 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 241 {
 242         int i;
 243
 244         LASSERT(i1 != NULL);
 245         LASSERT(suppgids != NULL);
 246
 247         if (in_group_p(i1->i_gid))
 248                 suppgids[0] = i1->i_gid;
 249         else
 250                 suppgids[0] = -1;
 251
 252         if (i2) {
 253                 if (in_group_p(i2->i_gid))
 254                         suppgids[1] = i2->i_gid;
 255                 else
 256                         suppgids[1] = -1;
 257         } else {
 258                 suppgids[1] = -1;
 259         }
 260
 261         for (i = 0; i < current_ngroups; i++) {
 262                 if (suppgids[0] == -1) {
 263                         if (current_groups[i] != suppgids[1])
 264                                 suppgids[0] = current_groups[i];
 265                         continue;
 266                 }
 267                 if (suppgids[1] == -1) {
 268                         if (current_groups[i] != suppgids[0])
 269                                 suppgids[1] = current_groups[i];
 270                         continue;
 271                 }
 272                 break;
 273         }
 274 }
 275
 276 static void ll_d_add(struct dentry *de, struct inode *inode)
 277 {
 278         CDEBUG(D_DENTRY, "adding inode %p to dentry %p\n", inode, de);
 279         /* d_instantiate */
 280         if (!list_empty(&de->d_alias)) {
 281                 spin_unlock(&dcache_lock);
 282                 CERROR("dentry %.*s %p alias next %p, prev %p\n",
 283                        de->d_name.len, de->d_name.name, de,
 284                        de->d_alias.next, de->d_alias.prev);
 285                 LBUG();
 286         }
 287         if (inode)
 288                 list_add(&de->d_alias, &inode->i_dentry);
 289         de->d_inode = inode;
 290
 291         /* d_rehash */
 292         if (!d_unhashed(de)) {
 293                 spin_unlock(&dcache_lock);
 294                 CERROR("dentry %.*s %p hash next %p\n",
 295                        de->d_name.len, de->d_name.name, de, de->d_hash.next);
 296                 LBUG();
 297         }
 298         __d_rehash(de, 0);
 299 }
 300
 301 /* Search "inode"'s alias list for a dentry that has the same name and parent
 302  * as de.  If found, return it.  If not found, return de.
 303  * Lustre can't use d_add_unique because don't unhash aliases for directory
 304  * in ll_revalidate_it.  After revaliadate inode will be have hashed aliases
 305  * and it triggers BUG_ON in d_instantiate_unique (bug #10954).
 306  */
 307 struct dentry *ll_find_alias(struct inode *inode, struct dentry *de)
 308 {
 309         struct list_head *tmp;
 310         struct dentry *dentry;
 311         struct dentry *last_discon = NULL;
 312
 313         spin_lock(&dcache_lock);
 314         list_for_each(tmp, &inode->i_dentry) {
 315                 dentry = list_entry(tmp, struct dentry, d_alias);
 316
 317                 /* We are called here with 'de' already on the aliases list. */
 318                 if (unlikely(dentry == de)) {
 319                         CERROR("whoops\n");
 320                         continue;
 321                 }
 322
 323                 if (dentry->d_flags & DCACHE_DISCONNECTED) {
 324                         LASSERT(last_discon == NULL);
 325                         last_discon = dentry;
 326                         continue;
 327                 }
 328
 329                 if (dentry->d_parent != de->d_parent)
 330                         continue;
 331
 332                 if (dentry->d_name.hash != de->d_name.hash)
 333                         continue;
 334
 335                 if (dentry->d_name.len != de->d_name.len)
 336                         continue;
 337
 338                 if (memcmp(dentry->d_name.name, de->d_name.name,
 339                            de->d_name.len) != 0)
 340                         continue;
 341
 342                 dget_locked(dentry);
 343                 lock_dentry(dentry);
 344                 __d_drop(dentry);
 345 #ifdef LUSTRE_KERNEL_VERSION
 346                 dentry->d_flags &= ~DCACHE_LUSTRE_INVALID;
 347 #endif
 348                 unlock_dentry(dentry);
 349                 __d_rehash(dentry, 0); /* avoid taking dcache_lock inside */
 350                 spin_unlock(&dcache_lock);
 351                 iput(inode);
 352                 CDEBUG(D_DENTRY, "alias dentry %.*s (%p) parent %p inode %p "
 353                        "refc %d\n", de->d_name.len, de->d_name.name, de,
 354                        de->d_parent, de->d_inode, atomic_read(&de->d_count));
 355                 return dentry;
 356         }
 357
 358         if (last_discon) {
 359                 CDEBUG(D_DENTRY, "Reuse disconnected dentry %p inode %p "
 360                         "refc %d\n", last_discon, last_discon->d_inode,
 361                         atomic_read(&last_discon->d_count));
 362                 __d_rehash(de, 0);
 363                 dget_locked(last_discon);
 364                 __d_move(last_discon, de);
 365                 spin_unlock(&dcache_lock);
 366                 d_rehash(de);
 367                 iput(inode);
 368                 return last_discon;
 369         }
 370
 371         ll_d_add(de, inode);
 372
 373         spin_unlock(&dcache_lock);
 374
 375         return de;
 376 }
 377
 378 static int lookup_it_finish(struct ptlrpc_request *request, int offset,
 379                             struct lookup_intent *it, void *data)
 380 {
 381         struct it_cb_data *icbd = data;
 382         struct dentry **de = icbd->icbd_childp;
 383         struct inode *parent = icbd->icbd_parent;
 384         struct ll_sb_info *sbi = ll_i2sbi(parent);
 385         struct inode *inode = NULL;
 386         int rc;
 387
 388         /* NB 1 request reference will be taken away by ll_intent_lock()
 389          * when I return */
 390         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 391                 ENTRY;
 392
 393                 rc = ll_prep_inode(&inode, request, offset,
 394                                    (*de)->d_sb);
 395                 if (rc)
 396                         RETURN(rc);
 397
 398                 CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
 399                        inode, inode->i_ino, inode->i_generation);
 400                 md_set_lock_data(sbi->ll_md_exp,
 401                                  &it->d.lustre.it_lock_handle, inode);
 402
 403                 /* We used to query real size from OSTs here, but actually
 404                    this is not needed. For stat() calls size would be updated
 405                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 406                    2.4 and
 407                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 408                    Everybody else who needs correct file size would call
 409                    ll_glimpse_size or some equivalent themselves anyway.
 410                    Also see bug 7198. */
 411
 412                 *de = ll_find_alias(inode, *de);
 413         } else {
 414                 ENTRY;
 415                 /* Check that parent has UPDATE lock. If there is none, we
 416                    cannot afford to hash this dentry (done by ll_d_add) as it
 417                    might get picked up later when UPDATE lock will appear */
 418                 if (ll_have_md_lock(parent, MDS_INODELOCK_UPDATE)) {
 419                         spin_lock(&dcache_lock);
 420                         ll_d_add(*de, inode);
 421                         spin_unlock(&dcache_lock);
 422                 } else {
 423                         (*de)->d_inode = NULL;
 424                         /* We do not want to hash the dentry if don`t have a
 425                          * lock, but if this dentry is later used in d_move,
 426                          * we'd hit uninitialised list head d_hash, so we just
 427                          * do this to init d_hash field but leave dentry
 428                          * unhashed. (bug 10796). */
 429                         d_rehash(*de);
 430                         d_drop(*de);
 431                 }
 432         }
 433
 434         ll_set_dd(*de);
 435         (*de)->d_op = &ll_d_ops;
 436
 437         RETURN(0);
 438 }
 439
 440 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 441                                    struct lookup_intent *it, int lookup_flags)
 442 {
 443         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 444         struct dentry *save = dentry, *retval;
 445         struct ptlrpc_request *req = NULL;
 446         struct md_op_data *op_data;
 447         struct it_cb_data icbd;
 448         __u32 opc;
 449         int rc;
 450         ENTRY;
 451
 452         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 453                 RETURN(ERR_PTR(-ENAMETOOLONG));
 454
 455         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 456                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 457                parent->i_generation, parent, LL_IT2STR(it));
 458
 459         if (d_mountpoint(dentry))
 460                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 461
 462         ll_frob_intent(&it, &lookup_it);
 463
 464         /* As do_lookup is called before follow_mount, root dentry may be left
 465          * not valid, revalidate it here. */
 466         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 467             (it->it_op & (IT_OPEN | IT_CREAT))) {
 468                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it);
 469                 if (rc)
 470                         RETURN(ERR_PTR(rc));
 471         }
 472
 473         icbd.icbd_childp = &dentry;
 474         icbd.icbd_parent = parent;
 475
 476         if (it->it_op & IT_CREAT ||
 477             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 478                 opc = LUSTRE_OPC_CREATE;
 479         else
 480                 opc = LUSTRE_OPC_ANY;
 481
 482         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 483                                      dentry->d_name.len, lookup_flags, opc,
 484                                      NULL);
 485         if (IS_ERR(op_data))
 486                 RETURN((void *)op_data);
 487
 488         it->it_create_mode &= ~current->fs->umask;
 489
 490         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 491                             lookup_flags, &req, ll_md_blocking_ast, 0);
 492         ll_finish_md_op_data(op_data);
 493         if (rc < 0)
 494                 GOTO(out, retval = ERR_PTR(rc));
 495
 496         rc = lookup_it_finish(req, DLM_REPLY_REC_OFF, it, &icbd);
 497         if (rc != 0) {
 498                 ll_intent_release(it);
 499                 GOTO(out, retval = ERR_PTR(rc));
 500         }
 501
 502         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 503             !S_ISREG(dentry->d_inode->i_mode) &&
 504             !S_ISDIR(dentry->d_inode->i_mode)) {
 505                 ll_release_openhandle(dentry, it);
 506         }
 507         ll_lookup_finish_locks(it, dentry);
 508
 509         if (dentry == save)
 510                 GOTO(out, retval = NULL);
 511         else
 512                 GOTO(out, retval = dentry);
 513  out:
 514         if (req)
 515                 ptlrpc_req_finished(req);
 516         return retval;
 517 }
 518
 519 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 520 #ifdef LUSTRE_KERNEL_VERSION
 521 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 522                                    struct nameidata *nd)
 523 {
 524         struct dentry *de;
 525         ENTRY;
 526
 527         if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
 528                 de = ll_lookup_it(parent, dentry, &nd->intent, nd->flags);
 529         else
 530                 de = ll_lookup_it(parent, dentry, NULL, 0);
 531
 532         RETURN(de);
 533 }
 534 #else
 535 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 536                                         int lookup_flags)
 537 {
 538         struct lookup_intent *it;
 539
 540         OBD_ALLOC(it, sizeof(*it));
 541         if (!it)
 542                 return ERR_PTR(-ENOMEM);
 543
 544         if (lookup_flags & LOOKUP_OPEN) {
 545                 it->it_op = IT_OPEN;
 546                 if (lookup_flags & LOOKUP_CREATE)
 547                         it->it_op |= IT_CREAT;
 548                 it->it_create_mode = oit->create_mode;
 549                 it->it_flags = oit->flags;
 550         } else {
 551                 it->it_op = IT_GETATTR;
 552         }
 553
 554 #ifndef HAVE_FILE_IN_STRUCT_INTENT
 555                 /* Since there is no way to pass our intent to ll_file_open,
 556                  * just check the file is there. Actual open will be done
 557                  * in ll_file_open */
 558                 if (it->it_op & IT_OPEN)
 559                         it->it_op = IT_LOOKUP;
 560 #endif
 561
 562         return it;
 563 }
 564
 565 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 566                                    struct nameidata *nd)
 567 {
 568         struct dentry *de;
 569         ENTRY;
 570
 571         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 572                 struct lookup_intent *it;
 573
 574 #if defined(HAVE_FILE_IN_STRUCT_INTENT) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 575                 /* Did we came here from failed revalidate just to propagate
 576                  * its error? */
 577                 if (nd->flags & LOOKUP_OPEN)
 578                         if (IS_ERR(nd->intent.open.file))
 579                                 RETURN((struct dentry *)nd->intent.open.file);
 580 #endif
 581
 582                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 583                         it = ll_d2d(dentry)->lld_it;
 584                         ll_d2d(dentry)->lld_it = NULL;
 585                 } else {
 586                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 587                         if (IS_ERR(it))
 588                                 RETURN((struct dentry *)it);
 589                 }
 590
 591                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 592                 if (de)
 593                         dentry = de;
 594                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 595                         if (dentry->d_inode &&
 596                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 597 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 598                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 599                                         // We cannot call open here as it would
 600                                         // deadlock.
 601                                         ptlrpc_req_finished(
 602                                                        (struct ptlrpc_request *)
 603                                                           it->d.lustre.it_data);
 604                                 } else {
 605                                         struct file *filp;
 606                                         nd->intent.open.file->private_data = it;
 607                                         filp =lookup_instantiate_filp(nd,dentry,
 608                                                                       NULL);
 609 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 610 /* 2.6.1[456] have a bug in open_namei() that forgets to check
 611  * nd->intent.open.file for error, so we need to return it as lookup's result
 612  * instead */
 613                                         if (IS_ERR(filp)) {
 614                                                 if (de)
 615                                                         dput(de);
 616                                                 de = (struct dentry *) filp;
 617                                         }
 618 #endif
 619
 620                                 }
 621 #else /* HAVE_FILE_IN_STRUCT_INTENT */
 622                                 /* Release open handle as we have no way to
 623                                  * pass it to ll_file_open */
 624                                 ll_release_openhandle(dentry, it);
 625 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
 626                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 627                                 // XXX This can only reliably work on assumption
 628                                 // that there are NO hashed negative dentries.
 629                                 ll_d2d(dentry)->lld_it = it;
 630                                 it = NULL; /* Will be freed in ll_create_nd */
 631                                 /* We absolutely depend on ll_create_nd to be
 632                                  * called to not leak this intent and possible
 633                                  * data attached to it */
 634                         }
 635                 }
 636
 637                 if (it) {
 638                         ll_intent_release(it);
 639                         OBD_FREE(it, sizeof(*it));
 640                 }
 641         } else {
 642                 de = ll_lookup_it(parent, dentry, NULL, 0);
 643         }
 644
 645         RETURN(de);
 646 }
 647 #endif
 648 #endif
 649
 650 /* We depend on "mode" being set with the proper file type/umask by now */
 651 static struct inode *ll_create_node(struct inode *dir, const char *name,
 652                                     int namelen, const void *data, int datalen,
 653                                     int mode, __u64 extra,
 654                                     struct lookup_intent *it)
 655 {
 656         struct inode *inode = NULL;
 657         struct ptlrpc_request *request = NULL;
 658         struct ll_sb_info *sbi = ll_i2sbi(dir);
 659         int rc;
 660         ENTRY;
 661
 662         LASSERT(it && it->d.lustre.it_disposition);
 663
 664         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 665         request = it->d.lustre.it_data;
 666         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 667         rc = ll_prep_inode(&inode, request, DLM_REPLY_REC_OFF, dir->i_sb);
 668         if (rc)
 669                 GOTO(out, inode = ERR_PTR(rc));
 670
 671         LASSERT(list_empty(&inode->i_dentry));
 672
 673         /* We asked for a lock on the directory, but were granted a
 674          * lock on the inode.  Since we finally have an inode pointer,
 675          * stuff it in the lock. */
 676         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 677                inode, inode->i_ino, inode->i_generation);
 678         md_set_lock_data(sbi->ll_md_exp,
 679                          &it->d.lustre.it_lock_handle, inode);
 680         EXIT;
 681  out:
 682         ptlrpc_req_finished(request);
 683         return inode;
 684 }
 685
 686 /*
 687  * By the time this is called, we already have created the directory cache
 688  * entry for the new file, but it is so far negative - it has no inode.
 689  *
 690  * We defer creating the OBD object(s) until open, to keep the intent and
 691  * non-intent code paths similar, and also because we do not have the MDS
 692  * inode number before calling ll_create_node() (which is needed for LOV),
 693  * so we would need to do yet another RPC to the MDS to store the LOV EA
 694  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 695  * lmm_size in datalen (the MDS still has code which will handle that).
 696  *
 697  * If the create succeeds, we fill in the inode information
 698  * with d_instantiate().
 699  */
 700 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 701                         struct lookup_intent *it)
 702 {
 703         struct inode *inode;
 704         int rc = 0;
 705         ENTRY;
 706
 707         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 708                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 709                dir->i_generation, dir, LL_IT2STR(it));
 710
 711         rc = it_open_error(DISP_OPEN_CREATE, it);
 712         if (rc)
 713                 RETURN(rc);
 714
 715         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 716                                NULL, 0, mode, 0, it);
 717         if (IS_ERR(inode)) {
 718                 RETURN(PTR_ERR(inode));
 719         }
 720
 721         d_instantiate(dentry, inode);
 722         /* Negative dentry may be unhashed if parent does not have UPDATE lock,
 723          * but some callers, e.g. do_coredump, expect dentry to be hashed after
 724          * successful create. Hash it here. */
 725         spin_lock(&dcache_lock);
 726         if (d_unhashed(dentry))
 727                 __d_rehash(dentry, 0);
 728         spin_unlock(&dcache_lock);
 729         RETURN(0);
 730 }
 731
 732 static void ll_update_times(struct ptlrpc_request *request, int offset,
 733                             struct inode *inode)
 734 {
 735         struct mdt_body *body = lustre_msg_buf(request->rq_repmsg, offset,
 736                                                sizeof(*body));
 737         LASSERT(body);
 738
 739         /* mtime is always updated with ctime, but can be set in past.
 740            As write and utime(2) may happen within 1 second, and utime's
 741            mtime has a priority over write's one, so take mtime from mds
 742            for the same ctimes. */
 743         if (body->valid & OBD_MD_FLCTIME &&
 744             body->ctime >= LTIME_S(inode->i_ctime)) {
 745                 LTIME_S(inode->i_ctime) = body->ctime;
 746
 747                 if (body->valid & OBD_MD_FLMTIME) {
 748                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
 749                                "to "LPU64"\n", inode->i_ino,
 750                                LTIME_S(inode->i_mtime), body->mtime);
 751                         LTIME_S(inode->i_mtime) = body->mtime;
 752                 }
 753         }
 754 }
 755
 756 static int ll_new_node(struct inode *dir, struct qstr *name,
 757                        const char *tgt, int mode, int rdev,
 758                        struct dentry *dchild, __u32 opc)
 759 {
 760         struct ptlrpc_request *request = NULL;
 761         struct md_op_data *op_data;
 762         struct inode *inode = NULL;
 763         struct ll_sb_info *sbi = ll_i2sbi(dir);
 764         int tgt_len = 0;
 765         int err;
 766
 767         ENTRY;
 768         if (unlikely(tgt != NULL))
 769                 tgt_len = strlen(tgt) + 1;
 770
 771         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 772                                      name->len, 0, opc, NULL);
 773         if (IS_ERR(op_data))
 774                 GOTO(err_exit, err = PTR_ERR(op_data));
 775
 776         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 777                         current->fsuid, current->fsgid,
 778                         current->cap_effective, rdev, &request);
 779         ll_finish_md_op_data(op_data);
 780         if (err)
 781                 GOTO(err_exit, err);
 782
 783         ll_update_times(request, REPLY_REC_OFF, dir);
 784
 785         if (dchild) {
 786                 err = ll_prep_inode(&inode, request, REPLY_REC_OFF,
 787                                     dchild->d_sb);
 788                 if (err)
 789                      GOTO(err_exit, err);
 790
 791                 d_drop(dchild);
 792                 d_instantiate(dchild, inode);
 793                 EXIT;
 794         }
 795 err_exit:
 796         ptlrpc_req_finished(request);
 797
 798         return err;
 799 }
 800
 801 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 802                             unsigned rdev, struct dentry *dchild)
 803 {
 804         int err;
 805         ENTRY;
 806
 807         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 808                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 809                mode, rdev);
 810
 811         mode &= ~current->fs->umask;
 812
 813         switch (mode & S_IFMT) {
 814         case 0:
 815                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 816         case S_IFREG:
 817         case S_IFCHR:
 818         case S_IFBLK:
 819         case S_IFIFO:
 820         case S_IFSOCK:
 821                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 822                                   LUSTRE_OPC_MKNOD);
 823                 break;
 824         case S_IFDIR:
 825                 err = -EPERM;
 826                 break;
 827         default:
 828                 err = -EINVAL;
 829         }
 830         RETURN(err);
 831 }
 832
 833 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 834 #ifndef LUSTRE_KERNEL_VERSION
 835 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 836                         int mode, struct nameidata *nd)
 837 {
 838         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 839         int rc;
 840
 841         if (!it)
 842                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 843
 844         ll_d2d(dentry)->lld_it = NULL;
 845
 846         /* Was there an error? Propagate it! */
 847         if (it->d.lustre.it_status) {
 848                 rc = it->d.lustre.it_status;
 849                 goto out;
 850         }
 851
 852         rc = ll_create_it(dir, dentry, mode, it);
 853 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 854         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 855                 nd->intent.open.file->private_data = it;
 856                 lookup_instantiate_filp(nd, dentry, NULL);
 857         }
 858 #else
 859         ll_release_openhandle(dentry,it);
 860 #endif
 861
 862 out:
 863         ll_intent_release(it);
 864         OBD_FREE(it, sizeof(*it));
 865
 866         return rc;
 867 }
 868 #else
 869 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 870                         int mode, struct nameidata *nd)
 871 {
 872         if (!nd || !nd->intent.d.lustre.it_disposition)
 873                 /* No saved request? Just mknod the file */
 874                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 875
 876         return ll_create_it(dir, dentry, mode, &nd->intent);
 877 }
 878 #endif
 879 #endif
 880
 881 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 882                               const char *tgt, struct dentry *dchild)
 883 {
 884         int err;
 885         ENTRY;
 886
 887         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 888                name->len, name->name, dir->i_ino, dir->i_generation,
 889                dir, 3000, tgt);
 890
 891         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 892                           0, dchild, LUSTRE_OPC_SYMLINK);
 893         RETURN(err);
 894 }
 895
 896 static int ll_link_generic(struct inode *src,  struct inode *dir,
 897                            struct qstr *name, struct dentry *dchild)
 898 {
 899         struct ll_sb_info *sbi = ll_i2sbi(dir);
 900         struct ptlrpc_request *request = NULL;
 901         struct md_op_data *op_data;
 902         int err;
 903
 904         ENTRY;
 905         CDEBUG(D_VFSTRACE,
 906                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
 907                src->i_ino, src->i_generation, src, dir->i_ino,
 908                dir->i_generation, dir, name->len, name->name);
 909
 910         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
 911                                      0, LUSTRE_OPC_ANY, NULL);
 912         if (IS_ERR(op_data))
 913                 RETURN(PTR_ERR(op_data));
 914
 915         err = md_link(sbi->ll_md_exp, op_data, &request);
 916         ll_finish_md_op_data(op_data);
 917         if (err)
 918                 GOTO(out, err);
 919         if (dchild)
 920                 d_drop(dchild);
 921
 922         ll_update_times(request, REPLY_REC_OFF, dir);
 923         EXIT;
 924 out:
 925         ptlrpc_req_finished(request);
 926         RETURN(err);
 927 }
 928
 929 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
 930                             int mode, struct dentry *dchild)
 931
 932 {
 933         int err;
 934         ENTRY;
 935
 936         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 937                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 938
 939         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
 940         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
 941
 942         RETURN(err);
 943 }
 944
 945 /* Try to find the child dentry by its name.
 946    If found, put the result fid into @fid. */
 947 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
 948                              struct lu_fid *fid)
 949 {
 950         struct dentry *parent, *child;
 951
 952         parent = list_entry(dir->i_dentry.next, struct dentry, d_alias);
 953         child = d_lookup(parent, name);
 954         if (child) {
 955                 if (child->d_inode)
 956                         *fid = *ll_inode2fid(child->d_inode);
 957                 dput(child);
 958         }
 959 }
 960
 961 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
 962                             struct dentry *dchild, struct qstr *name)
 963 {
 964         struct ptlrpc_request *request = NULL;
 965         struct md_op_data *op_data;
 966         int rc;
 967         ENTRY;
 968
 969         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 970                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 971
 972         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
 973                 RETURN(-EBUSY);
 974
 975         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
 976                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
 977         if (IS_ERR(op_data))
 978                 RETURN(PTR_ERR(op_data));
 979
 980         ll_get_child_fid(dir, name, &op_data->op_fid3);
 981         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
 982         ll_finish_md_op_data(op_data);
 983         if (rc == 0)
 984                 ll_update_times(request, REPLY_REC_OFF, dir);
 985         ptlrpc_req_finished(request);
 986         RETURN(rc);
 987 }
 988
 989 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
 990 {
 991         struct mdt_body *body;
 992         struct lov_mds_md *eadata;
 993         struct lov_stripe_md *lsm = NULL;
 994         struct obd_trans_info oti = { 0 };
 995         struct obdo *oa;
 996         int rc;
 997         ENTRY;
 998
 999         /* req is swabbed so this is safe */
1000         body = lustre_msg_buf(request->rq_repmsg, REPLY_REC_OFF, sizeof(*body));
1001
1002         if (!(body->valid & OBD_MD_FLEASIZE))
1003                 RETURN(0);
1004
1005         if (body->eadatasize == 0) {
1006                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1007                 GOTO(out, rc = -EPROTO);
1008         }
1009
1010         /* The MDS sent back the EA because we unlinked the last reference
1011          * to this file. Use this EA to unlink the objects on the OST.
1012          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1013          * check it is complete and sensible. */
1014         eadata = lustre_swab_repbuf(request, REPLY_REC_OFF + 1,
1015                                     body->eadatasize, NULL);
1016         LASSERT(eadata != NULL);
1017         if (eadata == NULL) {
1018                 CERROR("Can't unpack MDS EA data\n");
1019                 GOTO(out, rc = -EPROTO);
1020         }
1021
1022         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1023         if (rc < 0) {
1024                 CERROR("obd_unpackmd: %d\n", rc);
1025                 GOTO(out, rc);
1026         }
1027         LASSERT(rc >= sizeof(*lsm));
1028
1029         rc = obd_checkmd(ll_i2dtexp(dir), ll_i2mdexp(dir), lsm);
1030         if (rc)
1031                 GOTO(out_free_memmd, rc);
1032
1033         OBDO_ALLOC(oa);
1034         if (oa == NULL)
1035                 GOTO(out_free_memmd, rc = -ENOMEM);
1036
1037         oa->o_id = lsm->lsm_object_id;
1038         oa->o_gr = lsm->lsm_object_gr;
1039         oa->o_mode = body->mode & S_IFMT;
1040         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1041
1042         if (body->valid & OBD_MD_FLCOOKIE) {
1043                 oa->o_valid |= OBD_MD_FLCOOKIE;
1044                 oti.oti_logcookies =
1045                         lustre_msg_buf(request->rq_repmsg, REPLY_REC_OFF + 2,
1046                                        sizeof(struct llog_cookie) *
1047                                        lsm->lsm_stripe_count);
1048                 if (oti.oti_logcookies == NULL) {
1049                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1050                         body->valid &= ~OBD_MD_FLCOOKIE;
1051                 }
1052         }
1053
1054         rc = obd_destroy(ll_i2dtexp(dir), oa, lsm, &oti, ll_i2mdexp(dir));
1055         OBDO_FREE(oa);
1056         if (rc)
1057                 CERROR("obd destroy objid "LPX64" error %d\n",
1058                        lsm->lsm_object_id, rc);
1059  out_free_memmd:
1060         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1061  out:
1062         return rc;
1063 }
1064
1065 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1066                              struct dentry *dchild, struct qstr *name)
1067 {
1068         struct ptlrpc_request *request = NULL;
1069         struct md_op_data *op_data;
1070         int rc;
1071         ENTRY;
1072         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1073                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1074
1075         /*
1076          * XXX: unlink bind mountpoint maybe call to here,
1077          * just check it as vfs_unlink does.
1078          */
1079         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1080                 RETURN(-EBUSY);
1081
1082         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1083                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1084         if (IS_ERR(op_data))
1085                 RETURN(PTR_ERR(op_data));
1086
1087         ll_get_child_fid(dir, name, &op_data->op_fid3);
1088         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1089         ll_finish_md_op_data(op_data);
1090
1091         if (rc)
1092                 GOTO(out, rc);
1093
1094         ll_update_times(request, REPLY_REC_OFF, dir);
1095
1096         rc = ll_objects_destroy(request, dir);
1097  out:
1098         ptlrpc_req_finished(request);
1099         RETURN(rc);
1100 }
1101
1102 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1103                              struct dentry *src_dchild, struct qstr *src_name,
1104                              struct inode *tgt, struct dentry *tgt_dparent,
1105                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1106 {
1107         struct ptlrpc_request *request = NULL;
1108         struct ll_sb_info *sbi = ll_i2sbi(src);
1109         struct md_op_data *op_data;
1110         int err;
1111         ENTRY;
1112         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1113                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1114                src->i_ino, src->i_generation, src, tgt_name->len,
1115                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1116
1117         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1118             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1119                 RETURN(-EBUSY);
1120
1121         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1122                                      LUSTRE_OPC_ANY, NULL);
1123         if (IS_ERR(op_data))
1124                 RETURN(PTR_ERR(op_data));
1125
1126         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1127         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1128         err = md_rename(sbi->ll_md_exp, op_data,
1129                         src_name->name, src_name->len,
1130                         tgt_name->name, tgt_name->len, &request);
1131         ll_finish_md_op_data(op_data);
1132         if (!err) {
1133                 ll_update_times(request, REPLY_REC_OFF, src);
1134                 ll_update_times(request, REPLY_REC_OFF, tgt);
1135                 err = ll_objects_destroy(request, src);
1136         }
1137
1138         ptlrpc_req_finished(request);
1139
1140         RETURN(err);
1141 }
1142
1143 #ifdef LUSTRE_KERNEL_VERSION
1144 static int ll_mknod_raw(struct nameidata *nd, int mode, dev_t rdev)
1145 {
1146         return ll_mknod_generic(nd->dentry->d_inode, &nd->last, mode,rdev,NULL);
1147 }
1148 static int ll_rename_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1149 {
1150         return ll_rename_generic(srcnd->dentry->d_inode, srcnd->dentry,
1151                                  NULL, &srcnd->last,
1152                                  tgtnd->dentry->d_inode, tgtnd->dentry,
1153                                  NULL, &tgtnd->last);
1154 }
1155 static int ll_link_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1156 {
1157         return ll_link_generic(srcnd->dentry->d_inode, tgtnd->dentry->d_inode,
1158                                &tgtnd->last, NULL);
1159 }
1160 static int ll_symlink_raw(struct nameidata *nd, const char *tgt)
1161 {
1162         return ll_symlink_generic(nd->dentry->d_inode, &nd->last, tgt, NULL);
1163 }
1164 static int ll_rmdir_raw(struct nameidata *nd)
1165 {
1166         return ll_rmdir_generic(nd->dentry->d_inode, nd->dentry, NULL,
1167                                 &nd->last);
1168 }
1169 static int ll_mkdir_raw(struct nameidata *nd, int mode)
1170 {
1171         return ll_mkdir_generic(nd->dentry->d_inode, &nd->last, mode, NULL);
1172 }
1173 static int ll_unlink_raw(struct nameidata *nd)
1174 {
1175         return ll_unlink_generic(nd->dentry->d_inode, nd->dentry, NULL,
1176                                  &nd->last);
1177 }
1178 #endif
1179
1180 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1181                     ll_dev_t rdev)
1182 {
1183         return ll_mknod_generic(dir, &dchild->d_name, mode,
1184                                 old_encode_dev(rdev), dchild);
1185 }
1186
1187 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1188 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1189 {
1190         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1191 }
1192 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1193 {
1194         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1195 }
1196 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1197 {
1198         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1199 }
1200 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1201                       const char *oldname)
1202 {
1203         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1204 }
1205 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1206                    struct dentry *new_dentry)
1207 {
1208         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1209                                new_dentry);
1210 }
1211 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1212                      struct inode *new_dir, struct dentry *new_dentry)
1213 {
1214         return ll_rename_generic(old_dir, NULL,
1215                                  old_dentry, &old_dentry->d_name,
1216                                  new_dir, NULL, new_dentry,
1217                                  &new_dentry->d_name);
1218 }
1219 #endif
1220
1221 struct inode_operations ll_dir_inode_operations = {
1222 #ifdef LUSTRE_KERNEL_VERSION
1223         .link_raw           = ll_link_raw,
1224         .unlink_raw         = ll_unlink_raw,
1225         .symlink_raw        = ll_symlink_raw,
1226         .mkdir_raw          = ll_mkdir_raw,
1227         .rmdir_raw          = ll_rmdir_raw,
1228         .mknod_raw          = ll_mknod_raw,
1229         .rename_raw         = ll_rename_raw,
1230         .setattr            = ll_setattr,
1231         .setattr_raw        = ll_setattr_raw,
1232 #endif
1233         .mknod              = ll_mknod,
1234 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
1235         .create_it          = ll_create_it,
1236         .lookup_it          = ll_lookup_it,
1237         .revalidate_it      = ll_inode_revalidate_it,
1238 #else
1239         .lookup             = ll_lookup_nd,
1240         .create             = ll_create_nd,
1241         /* We need all these non-raw things for NFSD, to not patch it. */
1242         .unlink             = ll_unlink,
1243         .mkdir              = ll_mkdir,
1244         .rmdir              = ll_rmdir,
1245         .symlink            = ll_symlink,
1246         .link               = ll_link,
1247         .rename             = ll_rename,
1248         .setattr            = ll_setattr,
1249         .getattr            = ll_getattr,
1250 #endif
1251         .permission         = ll_inode_permission,
1252         .setxattr           = ll_setxattr,
1253         .getxattr           = ll_getxattr,
1254         .listxattr          = ll_listxattr,
1255         .removexattr        = ll_removexattr,
1256 };
1257
1258 struct inode_operations ll_special_inode_operations = {
1259 #ifdef LUSTRE_KERNEL_VERSION
1260         .setattr_raw    = ll_setattr_raw,
1261 #endif
1262         .setattr        = ll_setattr,
1263 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1264         .getattr        = ll_getattr,
1265 #else
1266         .revalidate_it  = ll_inode_revalidate_it,
1267 #endif
1268         .permission     = ll_inode_permission,
1269         .setxattr       = ll_setxattr,
1270         .getxattr       = ll_getxattr,
1271         .listxattr      = ll_listxattr,
1272         .removexattr    = ll_removexattr,
1273 };