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 (c) 2002, 2010, Oracle and/or its affiliates. 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                 ldlm_mode_t mode = lock->l_req_mode;
 204
 205                 /* Invalidate all dentries associated with this inode */
 206                 if (inode == NULL)
 207                         break;
 208
 209                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
 210                 /* For OPEN locks we differentiate between lock modes - CR, CW. PR - bug 22891 */
 211                 if ((bits & MDS_INODELOCK_LOOKUP) &&
 212                     ll_have_md_lock(inode, MDS_INODELOCK_LOOKUP, LCK_MINMODE))
 213                         bits &= ~MDS_INODELOCK_LOOKUP;
 214                 if ((bits & MDS_INODELOCK_UPDATE) &&
 215                     ll_have_md_lock(inode, MDS_INODELOCK_UPDATE, LCK_MINMODE))
 216                         bits &= ~MDS_INODELOCK_UPDATE;
 217                 if ((bits & MDS_INODELOCK_OPEN) &&
 218                     ll_have_md_lock(inode, MDS_INODELOCK_OPEN, mode))
 219                         bits &= ~MDS_INODELOCK_OPEN;
 220
 221                 fid = ll_inode2fid(inode);
 222                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
 223                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
 224                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
 225                         LDLM_ERROR(lock, "data mismatch with object "
 226                                    DFID" (%p)", PFID(fid), inode);
 227                 }
 228
 229                 if (bits & MDS_INODELOCK_OPEN) {
 230                         int flags = 0;
 231                         switch (lock->l_req_mode) {
 232                         case LCK_CW:
 233                                 flags = FMODE_WRITE;
 234                                 break;
 235                         case LCK_PR:
 236                                 flags = FMODE_EXEC;
 237                                 break;
 238                         case LCK_CR:
 239                                 flags = FMODE_READ;
 240                                 break;
 241                         default:
 242                                 CERROR("Unexpected lock mode for OPEN lock "
 243                                        "%d, inode %ld\n", lock->l_req_mode,
 244                                        inode->i_ino);
 245                         }
 246                         ll_md_real_close(inode, flags);
 247                 }
 248
 249                 lli = ll_i2info(inode);
 250                 if (bits & MDS_INODELOCK_UPDATE)
 251                         lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 252
 253                 if (S_ISDIR(inode->i_mode) &&
 254                      (bits & MDS_INODELOCK_UPDATE)) {
 255                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 256                                inode->i_ino);
 257                         truncate_inode_pages(inode->i_mapping, 0);
 258                         ll_drop_negative_dentry(inode);
 259                 }
 260
 261                 if (inode->i_sb->s_root &&
 262                     inode != inode->i_sb->s_root->d_inode &&
 263                     (bits & MDS_INODELOCK_LOOKUP))
 264                         ll_unhash_aliases(inode);
 265                 iput(inode);
 266                 break;
 267         }
 268         default:
 269                 LBUG();
 270         }
 271
 272         RETURN(0);
 273 }
 274
 275 __u32 ll_i2suppgid(struct inode *i)
 276 {
 277         if (cfs_curproc_is_in_groups(i->i_gid))
 278                 return (__u32)i->i_gid;
 279         else
 280                 return (__u32)(-1);
 281 }
 282
 283 /* Pack the required supplementary groups into the supplied groups array.
 284  * If we don't need to use the groups from the target inode(s) then we
 285  * instead pack one or more groups from the user's supplementary group
 286  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 287 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 288 {
 289 #if 0
 290         int i;
 291 #endif
 292
 293         LASSERT(i1 != NULL);
 294         LASSERT(suppgids != NULL);
 295
 296         suppgids[0] = ll_i2suppgid(i1);
 297
 298         if (i2)
 299                 suppgids[1] = ll_i2suppgid(i2);
 300                 else
 301                         suppgids[1] = -1;
 302
 303 #if 0
 304         for (i = 0; i < current_ngroups; i++) {
 305                 if (suppgids[0] == -1) {
 306                         if (current_groups[i] != suppgids[1])
 307                                 suppgids[0] = current_groups[i];
 308                         continue;
 309                 }
 310                 if (suppgids[1] == -1) {
 311                         if (current_groups[i] != suppgids[0])
 312                                 suppgids[1] = current_groups[i];
 313                         continue;
 314                 }
 315                 break;
 316         }
 317 #endif
 318 }
 319
 320 static void ll_d_add(struct dentry *de, struct inode *inode)
 321 {
 322         CDEBUG(D_DENTRY, "adding inode %p to dentry %p\n", inode, de);
 323         /* d_instantiate */
 324         if (!list_empty(&de->d_alias)) {
 325                 spin_unlock(&dcache_lock);
 326                 CERROR("dentry %.*s %p alias next %p, prev %p\n",
 327                        de->d_name.len, de->d_name.name, de,
 328                        de->d_alias.next, de->d_alias.prev);
 329                 LBUG();
 330         }
 331         if (inode)
 332                 list_add(&de->d_alias, &inode->i_dentry);
 333         de->d_inode = inode;
 334
 335         /* d_rehash */
 336         if (!d_unhashed(de)) {
 337                 spin_unlock(&dcache_lock);
 338                 CERROR("dentry %.*s %p hash next %p\n",
 339                        de->d_name.len, de->d_name.name, de, de->d_hash.next);
 340                 LBUG();
 341         }
 342         d_rehash_cond(de, 0);
 343 }
 344
 345 /* Search "inode"'s alias list for a dentry that has the same name and parent
 346  * as de.  If found, return it.  If not found, return de.
 347  * Lustre can't use d_add_unique because don't unhash aliases for directory
 348  * in ll_revalidate_it.  After revaliadate inode will be have hashed aliases
 349  * and it triggers BUG_ON in d_instantiate_unique (bug #10954).
 350  */
 351 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *de)
 352 {
 353         struct list_head *tmp;
 354         struct dentry *dentry;
 355         struct dentry *last_discon = NULL;
 356
 357         cfs_spin_lock(&ll_lookup_lock);
 358         spin_lock(&dcache_lock);
 359         list_for_each(tmp, &inode->i_dentry) {
 360                 dentry = list_entry(tmp, struct dentry, d_alias);
 361
 362                 /* We are called here with 'de' already on the aliases list. */
 363                 if (unlikely(dentry == de)) {
 364                         CERROR("whoops\n");
 365                         continue;
 366                 }
 367
 368                 if (dentry->d_flags & DCACHE_DISCONNECTED) {
 369                         LASSERT(last_discon == NULL);
 370                         last_discon = dentry;
 371                         continue;
 372                 }
 373
 374                 if (dentry->d_parent != de->d_parent)
 375                         continue;
 376
 377                 if (dentry->d_name.hash != de->d_name.hash)
 378                         continue;
 379
 380                 if (dentry->d_name.len != de->d_name.len)
 381                         continue;
 382
 383                 if (memcmp(dentry->d_name.name, de->d_name.name,
 384                            de->d_name.len) != 0)
 385                         continue;
 386
 387                 dget_locked(dentry);
 388                 lock_dentry(dentry);
 389                 __d_drop(dentry);
 390                 unlock_dentry(dentry);
 391                 ll_dops_init(dentry, 0);
 392                 d_rehash_cond(dentry, 0); /* avoid taking dcache_lock inside */
 393                 spin_unlock(&dcache_lock);
 394                 cfs_spin_unlock(&ll_lookup_lock);
 395                 iput(inode);
 396                 CDEBUG(D_DENTRY, "alias dentry %.*s (%p) parent %p inode %p "
 397                        "refc %d\n", de->d_name.len, de->d_name.name, de,
 398                        de->d_parent, de->d_inode, atomic_read(&de->d_count));
 399                 return dentry;
 400         }
 401
 402         if (last_discon) {
 403                 CDEBUG(D_DENTRY, "Reuse disconnected dentry %p inode %p "
 404                         "refc %d\n", last_discon, last_discon->d_inode,
 405                         atomic_read(&last_discon->d_count));
 406                 dget_locked(last_discon);
 407                 lock_dentry(last_discon);
 408                 last_discon->d_flags |= DCACHE_LUSTRE_INVALID;
 409                 unlock_dentry(last_discon);
 410                 spin_unlock(&dcache_lock);
 411                 cfs_spin_unlock(&ll_lookup_lock);
 412                 ll_dops_init(last_discon, 1);
 413                 d_rehash(de);
 414                 d_move(last_discon, de);
 415                 iput(inode);
 416                 return last_discon;
 417         }
 418         lock_dentry(de);
 419         de->d_flags |= DCACHE_LUSTRE_INVALID;
 420         unlock_dentry(de);
 421         ll_d_add(de, inode);
 422
 423         spin_unlock(&dcache_lock);
 424         cfs_spin_unlock(&ll_lookup_lock);
 425
 426         return de;
 427 }
 428
 429 int ll_lookup_it_finish(struct ptlrpc_request *request,
 430                         struct lookup_intent *it, void *data)
 431 {
 432         struct it_cb_data *icbd = data;
 433         struct dentry **de = icbd->icbd_childp;
 434         struct inode *parent = icbd->icbd_parent;
 435         struct ll_sb_info *sbi = ll_i2sbi(parent);
 436         struct inode *inode = NULL;
 437         int rc;
 438         ENTRY;
 439
 440         /* NB 1 request reference will be taken away by ll_intent_lock()
 441          * when I return */
 442         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 443                 struct dentry *save = *de;
 444                 __u32 bits;
 445
 446                 rc = ll_prep_inode(&inode, request, (*de)->d_sb);
 447                 if (rc)
 448                         RETURN(rc);
 449
 450                 CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
 451                        inode, inode->i_ino, inode->i_generation);
 452                 md_set_lock_data(sbi->ll_md_exp,
 453                                  &it->d.lustre.it_lock_handle, inode, &bits);
 454
 455                 /* We used to query real size from OSTs here, but actually
 456                    this is not needed. For stat() calls size would be updated
 457                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 458                    2.4 and
 459                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 460                    Everybody else who needs correct file size would call
 461                    cl_glimpse_size or some equivalent themselves anyway.
 462                    Also see bug 7198. */
 463                 ll_dops_init(*de, 1);
 464                 *de = ll_find_alias(inode, *de);
 465                 if (*de != save) {
 466                         struct ll_dentry_data *lld = ll_d2d(*de);
 467
 468                         /* just make sure the ll_dentry_data is ready */
 469                         if (unlikely(lld == NULL))
 470                                 ll_dops_init(*de, 1);
 471                 }
 472                 /* we have lookup look - unhide dentry */
 473                 if (bits & MDS_INODELOCK_LOOKUP) {
 474                         lock_dentry(*de);
 475                         (*de)->d_flags &= ~DCACHE_LUSTRE_INVALID;
 476                         unlock_dentry(*de);
 477                 }
 478         } else {
 479                 ll_dops_init(*de, 1);
 480                 /* Check that parent has UPDATE lock. If there is none, we
 481                    cannot afford to hash this dentry (done by ll_d_add) as it
 482                    might get picked up later when UPDATE lock will appear */
 483                 if (ll_have_md_lock(parent, MDS_INODELOCK_UPDATE, LCK_MINMODE)) {
 484                         spin_lock(&dcache_lock);
 485                         ll_d_add(*de, NULL);
 486                         spin_unlock(&dcache_lock);
 487                 } else {
 488                         /* negative lookup - and don't have update lock to
 489                          * parent */
 490                         lock_dentry(*de);
 491                         (*de)->d_flags |= DCACHE_LUSTRE_INVALID;
 492                         unlock_dentry(*de);
 493
 494                         (*de)->d_inode = NULL;
 495                         /* We do not want to hash the dentry if don`t have a
 496                          * lock, but if this dentry is later used in d_move,
 497                          * we'd hit uninitialised list head d_hash, so we just
 498                          * do this to init d_hash field but leave dentry
 499                          * unhashed. (bug 10796). */
 500                         d_rehash(*de);
 501                         d_drop(*de);
 502                 }
 503         }
 504
 505         RETURN(0);
 506 }
 507
 508 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 509                                    struct lookup_intent *it, int lookup_flags)
 510 {
 511         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 512         struct dentry *save = dentry, *retval;
 513         struct ptlrpc_request *req = NULL;
 514         struct md_op_data *op_data;
 515         struct it_cb_data icbd;
 516         __u32 opc;
 517         int rc, first = 0;
 518         ENTRY;
 519
 520         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 521                 RETURN(ERR_PTR(-ENAMETOOLONG));
 522
 523         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 524                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 525                parent->i_generation, parent, LL_IT2STR(it));
 526
 527         if (d_mountpoint(dentry))
 528                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 529
 530         ll_frob_intent(&it, &lookup_it);
 531
 532         /* As do_lookup is called before follow_mount, root dentry may be left
 533          * not valid, revalidate it here. */
 534         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 535             (it->it_op & (IT_OPEN | IT_CREAT))) {
 536                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it);
 537                 if (rc)
 538                         RETURN(ERR_PTR(rc));
 539         }
 540
 541         if (it->it_op == IT_GETATTR) {
 542                 first = ll_statahead_enter(parent, &dentry, 1);
 543                 if (first >= 0) {
 544                         ll_statahead_exit(parent, dentry, first);
 545                         if (first == 1)
 546                                 RETURN(retval = dentry);
 547                 }
 548         }
 549
 550         icbd.icbd_childp = &dentry;
 551         icbd.icbd_parent = parent;
 552
 553         if (it->it_op & IT_CREAT ||
 554             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 555                 opc = LUSTRE_OPC_CREATE;
 556         else
 557                 opc = LUSTRE_OPC_ANY;
 558
 559         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 560                                      dentry->d_name.len, lookup_flags, opc,
 561                                      NULL);
 562         if (IS_ERR(op_data))
 563                 RETURN((void *)op_data);
 564
 565         it->it_create_mode &= ~current->fs->umask;
 566
 567         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 568                             lookup_flags, &req, ll_md_blocking_ast, 0);
 569         ll_finish_md_op_data(op_data);
 570         if (rc < 0)
 571                 GOTO(out, retval = ERR_PTR(rc));
 572
 573         rc = ll_lookup_it_finish(req, it, &icbd);
 574         if (rc != 0) {
 575                 ll_intent_release(it);
 576                 GOTO(out, retval = ERR_PTR(rc));
 577         }
 578
 579         if (first == -EEXIST)
 580                 ll_statahead_mark(parent, dentry);
 581
 582         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 583             !S_ISREG(dentry->d_inode->i_mode) &&
 584             !S_ISDIR(dentry->d_inode->i_mode)) {
 585                 ll_release_openhandle(dentry, it);
 586         }
 587         ll_lookup_finish_locks(it, dentry);
 588
 589         if (dentry == save)
 590                 GOTO(out, retval = NULL);
 591         else
 592                 GOTO(out, retval = dentry);
 593  out:
 594         if (req)
 595                 ptlrpc_req_finished(req);
 596         return retval;
 597 }
 598
 599 #ifdef HAVE_VFS_INTENT_PATCHES
 600 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 601                                    struct nameidata *nd)
 602 {
 603         struct dentry *de;
 604         ENTRY;
 605
 606         if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
 607                 de = ll_lookup_it(parent, dentry, &nd->intent, nd->flags);
 608         else
 609                 de = ll_lookup_it(parent, dentry, NULL, 0);
 610
 611         RETURN(de);
 612 }
 613 #else
 614 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 615                                         int lookup_flags)
 616 {
 617         struct lookup_intent *it;
 618
 619         OBD_ALLOC(it, sizeof(*it));
 620         if (!it)
 621                 return ERR_PTR(-ENOMEM);
 622
 623         if (lookup_flags & LOOKUP_OPEN) {
 624                 it->it_op = IT_OPEN;
 625                 if (lookup_flags & LOOKUP_CREATE)
 626                         it->it_op |= IT_CREAT;
 627                 it->it_create_mode = oit->create_mode;
 628                 it->it_flags = oit->flags;
 629         } else {
 630                 it->it_op = IT_GETATTR;
 631         }
 632
 633 #ifndef HAVE_FILE_IN_STRUCT_INTENT
 634                 /* Since there is no way to pass our intent to ll_file_open,
 635                  * just check the file is there. Actual open will be done
 636                  * in ll_file_open */
 637                 if (it->it_op & IT_OPEN)
 638                         it->it_op = IT_LOOKUP;
 639 #endif
 640
 641         return it;
 642 }
 643
 644 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 645                                    struct nameidata *nd)
 646 {
 647         struct dentry *de;
 648         ENTRY;
 649
 650         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 651                 struct lookup_intent *it;
 652
 653 #if defined(HAVE_FILE_IN_STRUCT_INTENT) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 654                 /* Did we came here from failed revalidate just to propagate
 655                  * its error? */
 656                 if (nd->flags & LOOKUP_OPEN)
 657                         if (IS_ERR(nd->intent.open.file))
 658                                 RETURN((struct dentry *)nd->intent.open.file);
 659 #endif
 660                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 661                         it = ll_d2d(dentry)->lld_it;
 662                         ll_d2d(dentry)->lld_it = NULL;
 663                 } else {
 664                         if ((nd->flags & LOOKUP_CREATE ) && !(nd->flags & LOOKUP_OPEN)) {
 665                                 /* We are sure this is new dentry, so we need to create
 666                                    our private data and set the dentry ops */
 667                                 ll_dops_init(dentry, 1);
 668                                 RETURN(NULL);
 669                         }
 670                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 671                         if (IS_ERR(it))
 672                                 RETURN((struct dentry *)it);
 673                 }
 674
 675                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 676                 if (de)
 677                         dentry = de;
 678                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 679                         if (dentry->d_inode &&
 680                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 681 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 682                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 683                                         // We cannot call open here as it would
 684                                         // deadlock.
 685                                         ptlrpc_req_finished(
 686                                                        (struct ptlrpc_request *)
 687                                                           it->d.lustre.it_data);
 688                                 } else {
 689 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 690 /* 2.6.1[456] have a bug in open_namei() that forgets to check
 691  * nd->intent.open.file for error, so we need to return it as lookup's result
 692  * instead */
 693                                         struct file *filp;
 694                                         nd->intent.open.file->private_data = it;
 695                                         filp =lookup_instantiate_filp(nd,dentry,
 696                                                                       NULL);
 697                                         if (IS_ERR(filp)) {
 698                                                 if (de)
 699                                                         dput(de);
 700                                                 de = (struct dentry *) filp;
 701                                         }
 702 #else
 703                                         nd->intent.open.file->private_data = it;
 704                                         (void)lookup_instantiate_filp(nd,dentry,
 705                                                                       NULL);
 706 #endif
 707
 708                                 }
 709 #else /* HAVE_FILE_IN_STRUCT_INTENT */
 710                                 /* Release open handle as we have no way to
 711                                  * pass it to ll_file_open */
 712                                 ll_release_openhandle(dentry, it);
 713 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
 714                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 715                                 // XXX This can only reliably work on assumption
 716                                 // that there are NO hashed negative dentries.
 717                                 ll_d2d(dentry)->lld_it = it;
 718                                 it = NULL; /* Will be freed in ll_create_nd */
 719                                 /* We absolutely depend on ll_create_nd to be
 720                                  * called to not leak this intent and possible
 721                                  * data attached to it */
 722                         }
 723                 }
 724
 725                 if (it) {
 726                         ll_intent_release(it);
 727                         OBD_FREE(it, sizeof(*it));
 728                 }
 729         } else {
 730                 de = ll_lookup_it(parent, dentry, NULL, 0);
 731         }
 732
 733         RETURN(de);
 734 }
 735 #endif
 736
 737 /* We depend on "mode" being set with the proper file type/umask by now */
 738 static struct inode *ll_create_node(struct inode *dir, const char *name,
 739                                     int namelen, const void *data, int datalen,
 740                                     int mode, __u64 extra,
 741                                     struct lookup_intent *it)
 742 {
 743         struct inode *inode = NULL;
 744         struct ptlrpc_request *request = NULL;
 745         struct ll_sb_info *sbi = ll_i2sbi(dir);
 746         int rc;
 747         ENTRY;
 748
 749         LASSERT(it && it->d.lustre.it_disposition);
 750
 751         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 752         request = it->d.lustre.it_data;
 753         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 754         rc = ll_prep_inode(&inode, request, dir->i_sb);
 755         if (rc)
 756                 GOTO(out, inode = ERR_PTR(rc));
 757
 758         LASSERT(list_empty(&inode->i_dentry));
 759
 760         /* We asked for a lock on the directory, but were granted a
 761          * lock on the inode.  Since we finally have an inode pointer,
 762          * stuff it in the lock. */
 763         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 764                inode, inode->i_ino, inode->i_generation);
 765         md_set_lock_data(sbi->ll_md_exp,
 766                          &it->d.lustre.it_lock_handle, inode, NULL);
 767         EXIT;
 768  out:
 769         ptlrpc_req_finished(request);
 770         return inode;
 771 }
 772
 773 /*
 774  * By the time this is called, we already have created the directory cache
 775  * entry for the new file, but it is so far negative - it has no inode.
 776  *
 777  * We defer creating the OBD object(s) until open, to keep the intent and
 778  * non-intent code paths similar, and also because we do not have the MDS
 779  * inode number before calling ll_create_node() (which is needed for LOV),
 780  * so we would need to do yet another RPC to the MDS to store the LOV EA
 781  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 782  * lmm_size in datalen (the MDS still has code which will handle that).
 783  *
 784  * If the create succeeds, we fill in the inode information
 785  * with d_instantiate().
 786  */
 787 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 788                         struct lookup_intent *it)
 789 {
 790         struct inode *inode;
 791         int rc = 0;
 792         ENTRY;
 793
 794         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 795                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 796                dir->i_generation, dir, LL_IT2STR(it));
 797
 798         rc = it_open_error(DISP_OPEN_CREATE, it);
 799         if (rc)
 800                 RETURN(rc);
 801
 802         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 803                                NULL, 0, mode, 0, it);
 804         if (IS_ERR(inode))
 805                 RETURN(PTR_ERR(inode));
 806
 807         d_instantiate(dentry, inode);
 808         /* Negative dentry may be unhashed if parent does not have UPDATE lock,
 809          * but some callers, e.g. do_coredump, expect dentry to be hashed after
 810          * successful create. Hash it here. */
 811         spin_lock(&dcache_lock);
 812         if (d_unhashed(dentry))
 813                 d_rehash_cond(dentry, 0);
 814         spin_unlock(&dcache_lock);
 815         RETURN(0);
 816 }
 817
 818 static void ll_update_times(struct ptlrpc_request *request,
 819                             struct inode *inode)
 820 {
 821         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 822                                                        &RMF_MDT_BODY);
 823
 824         LASSERT(body);
 825         if (body->valid & OBD_MD_FLMTIME &&
 826             body->mtime > LTIME_S(inode->i_mtime)) {
 827                 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to "LPU64"\n",
 828                        inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
 829                 LTIME_S(inode->i_mtime) = body->mtime;
 830         }
 831         if (body->valid & OBD_MD_FLCTIME &&
 832             body->ctime > LTIME_S(inode->i_ctime))
 833                 LTIME_S(inode->i_ctime) = body->ctime;
 834 }
 835
 836 static int ll_new_node(struct inode *dir, struct qstr *name,
 837                        const char *tgt, int mode, int rdev,
 838                        struct dentry *dchild, __u32 opc)
 839 {
 840         struct ptlrpc_request *request = NULL;
 841         struct md_op_data *op_data;
 842         struct inode *inode = NULL;
 843         struct ll_sb_info *sbi = ll_i2sbi(dir);
 844         int tgt_len = 0;
 845         int err;
 846
 847         ENTRY;
 848         if (unlikely(tgt != NULL))
 849                 tgt_len = strlen(tgt) + 1;
 850
 851         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 852                                      name->len, 0, opc, NULL);
 853         if (IS_ERR(op_data))
 854                 GOTO(err_exit, err = PTR_ERR(op_data));
 855
 856         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 857                         cfs_curproc_fsuid(), cfs_curproc_fsgid(),
 858                         cfs_curproc_cap_pack(), rdev, &request);
 859         ll_finish_md_op_data(op_data);
 860         if (err)
 861                 GOTO(err_exit, err);
 862
 863         ll_update_times(request, dir);
 864
 865         if (dchild) {
 866                 err = ll_prep_inode(&inode, request, dchild->d_sb);
 867                 if (err)
 868                      GOTO(err_exit, err);
 869
 870                 d_drop(dchild);
 871                 d_instantiate(dchild, inode);
 872         }
 873         EXIT;
 874 err_exit:
 875         ptlrpc_req_finished(request);
 876
 877         return err;
 878 }
 879
 880 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 881                             unsigned rdev, struct dentry *dchild)
 882 {
 883         int err;
 884         ENTRY;
 885
 886         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 887                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 888                mode, rdev);
 889
 890         mode &= ~current->fs->umask;
 891
 892         switch (mode & S_IFMT) {
 893         case 0:
 894                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 895         case S_IFREG:
 896         case S_IFCHR:
 897         case S_IFBLK:
 898         case S_IFIFO:
 899         case S_IFSOCK:
 900                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 901                                   LUSTRE_OPC_MKNOD);
 902                 break;
 903         case S_IFDIR:
 904                 err = -EPERM;
 905                 break;
 906         default:
 907                 err = -EINVAL;
 908         }
 909         RETURN(err);
 910 }
 911
 912 #ifndef HAVE_VFS_INTENT_PATCHES
 913 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 914                         int mode, struct nameidata *nd)
 915 {
 916         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 917         int rc;
 918
 919         if (!it)
 920                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 921
 922         ll_d2d(dentry)->lld_it = NULL;
 923
 924         /* Was there an error? Propagate it! */
 925         if (it->d.lustre.it_status) {
 926                 rc = it->d.lustre.it_status;
 927                 goto out;
 928         }
 929
 930         rc = ll_create_it(dir, dentry, mode, it);
 931 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 932         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 933                 nd->intent.open.file->private_data = it;
 934                 lookup_instantiate_filp(nd, dentry, NULL);
 935         }
 936 #else
 937         ll_release_openhandle(dentry,it);
 938 #endif
 939
 940 out:
 941         ll_intent_release(it);
 942         OBD_FREE(it, sizeof(*it));
 943
 944         return rc;
 945 }
 946 #else
 947 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 948                         int mode, struct nameidata *nd)
 949 {
 950         if (!nd || !nd->intent.d.lustre.it_disposition)
 951                 /* No saved request? Just mknod the file */
 952                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 953
 954         return ll_create_it(dir, dentry, mode, &nd->intent);
 955 }
 956 #endif
 957
 958 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 959                               const char *tgt, struct dentry *dchild)
 960 {
 961         int err;
 962         ENTRY;
 963
 964         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 965                name->len, name->name, dir->i_ino, dir->i_generation,
 966                dir, 3000, tgt);
 967
 968         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 969                           0, dchild, LUSTRE_OPC_SYMLINK);
 970         RETURN(err);
 971 }
 972
 973 static int ll_link_generic(struct inode *src,  struct inode *dir,
 974                            struct qstr *name, struct dentry *dchild)
 975 {
 976         struct ll_sb_info *sbi = ll_i2sbi(dir);
 977         struct ptlrpc_request *request = NULL;
 978         struct md_op_data *op_data;
 979         int err;
 980
 981         ENTRY;
 982         CDEBUG(D_VFSTRACE,
 983                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
 984                src->i_ino, src->i_generation, src, dir->i_ino,
 985                dir->i_generation, dir, name->len, name->name);
 986
 987         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
 988                                      0, LUSTRE_OPC_ANY, NULL);
 989         if (IS_ERR(op_data))
 990                 RETURN(PTR_ERR(op_data));
 991
 992         err = md_link(sbi->ll_md_exp, op_data, &request);
 993         ll_finish_md_op_data(op_data);
 994         if (err)
 995                 GOTO(out, err);
 996         if (dchild)
 997                 d_drop(dchild);
 998
 999         ll_update_times(request, dir);
1000         EXIT;
1001 out:
1002         ptlrpc_req_finished(request);
1003         RETURN(err);
1004 }
1005
1006 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
1007                             int mode, struct dentry *dchild)
1008
1009 {
1010         int err;
1011         ENTRY;
1012
1013         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1014                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1015
1016         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
1017         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
1018
1019         RETURN(err);
1020 }
1021
1022 /* Try to find the child dentry by its name.
1023    If found, put the result fid into @fid. */
1024 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
1025                              struct lu_fid *fid)
1026 {
1027         struct dentry *parent, *child;
1028
1029         parent = list_entry(dir->i_dentry.next, struct dentry, d_alias);
1030         child = d_lookup(parent, name);
1031         if (child) {
1032                 if (child->d_inode)
1033                         *fid = *ll_inode2fid(child->d_inode);
1034                 dput(child);
1035         }
1036 }
1037
1038 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1039                             struct dentry *dchild, struct qstr *name)
1040 {
1041         struct ptlrpc_request *request = NULL;
1042         struct md_op_data *op_data;
1043         int rc;
1044         ENTRY;
1045
1046         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1047                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1048
1049         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1050                 RETURN(-EBUSY);
1051
1052         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1053                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1054         if (IS_ERR(op_data))
1055                 RETURN(PTR_ERR(op_data));
1056
1057         ll_get_child_fid(dir, name, &op_data->op_fid3);
1058         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1059         ll_finish_md_op_data(op_data);
1060         if (rc == 0)
1061                 ll_update_times(request, dir);
1062         ptlrpc_req_finished(request);
1063         RETURN(rc);
1064 }
1065
1066 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1067 {
1068         struct mdt_body *body;
1069         struct lov_mds_md *eadata;
1070         struct lov_stripe_md *lsm = NULL;
1071         struct obd_trans_info oti = { 0 };
1072         struct obdo *oa;
1073         struct obd_capa *oc = NULL;
1074         int rc;
1075         ENTRY;
1076
1077         /* req is swabbed so this is safe */
1078         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1079         if (!(body->valid & OBD_MD_FLEASIZE))
1080                 RETURN(0);
1081
1082         if (body->eadatasize == 0) {
1083                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1084                 GOTO(out, rc = -EPROTO);
1085         }
1086
1087         /* The MDS sent back the EA because we unlinked the last reference
1088          * to this file. Use this EA to unlink the objects on the OST.
1089          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1090          * check it is complete and sensible. */
1091         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1092                                               body->eadatasize);
1093         LASSERT(eadata != NULL);
1094
1095         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1096         if (rc < 0) {
1097                 CERROR("obd_unpackmd: %d\n", rc);
1098                 GOTO(out, rc);
1099         }
1100         LASSERT(rc >= sizeof(*lsm));
1101
1102         OBDO_ALLOC(oa);
1103         if (oa == NULL)
1104                 GOTO(out_free_memmd, rc = -ENOMEM);
1105
1106         oa->o_id = lsm->lsm_object_id;
1107         oa->o_seq = lsm->lsm_object_seq;
1108         oa->o_mode = body->mode & S_IFMT;
1109         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1110
1111         if (body->valid & OBD_MD_FLCOOKIE) {
1112                 oa->o_valid |= OBD_MD_FLCOOKIE;
1113                 oti.oti_logcookies =
1114                         req_capsule_server_sized_get(&request->rq_pill,
1115                                                      &RMF_LOGCOOKIES,
1116                                                    sizeof(struct llog_cookie) *
1117                                                      lsm->lsm_stripe_count);
1118                 if (oti.oti_logcookies == NULL) {
1119                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1120                         body->valid &= ~OBD_MD_FLCOOKIE;
1121                 }
1122         }
1123
1124         if (body->valid & OBD_MD_FLOSSCAPA) {
1125                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1126                 if (rc)
1127                         GOTO(out_free_memmd, rc);
1128         }
1129
1130         rc = obd_destroy(ll_i2dtexp(dir), oa, lsm, &oti, ll_i2mdexp(dir), oc);
1131         capa_put(oc);
1132         OBDO_FREE(oa);
1133         if (rc)
1134                 CERROR("obd destroy objid "LPX64" error %d\n",
1135                        lsm->lsm_object_id, rc);
1136  out_free_memmd:
1137         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1138  out:
1139         return rc;
1140 }
1141
1142 /* ll_unlink_generic() doesn't update the inode with the new link count.
1143  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
1144  * is any lock existing. They will recycle dentries and inodes based upon locks
1145  * too. b=20433 */
1146 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1147                              struct dentry *dchild, struct qstr *name)
1148 {
1149         struct ptlrpc_request *request = NULL;
1150         struct md_op_data *op_data;
1151         int rc;
1152         ENTRY;
1153         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1154                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1155
1156         /*
1157          * XXX: unlink bind mountpoint maybe call to here,
1158          * just check it as vfs_unlink does.
1159          */
1160         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1161                 RETURN(-EBUSY);
1162
1163         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1164                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1165         if (IS_ERR(op_data))
1166                 RETURN(PTR_ERR(op_data));
1167
1168         ll_get_child_fid(dir, name, &op_data->op_fid3);
1169         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1170         ll_finish_md_op_data(op_data);
1171         if (rc)
1172                 GOTO(out, rc);
1173
1174         ll_update_times(request, dir);
1175
1176         rc = ll_objects_destroy(request, dir);
1177  out:
1178         ptlrpc_req_finished(request);
1179         RETURN(rc);
1180 }
1181
1182 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1183                              struct dentry *src_dchild, struct qstr *src_name,
1184                              struct inode *tgt, struct dentry *tgt_dparent,
1185                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1186 {
1187         struct ptlrpc_request *request = NULL;
1188         struct ll_sb_info *sbi = ll_i2sbi(src);
1189         struct md_op_data *op_data;
1190         int err;
1191         ENTRY;
1192         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1193                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1194                src->i_ino, src->i_generation, src, tgt_name->len,
1195                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1196
1197         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1198             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1199                 RETURN(-EBUSY);
1200
1201         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1202                                      LUSTRE_OPC_ANY, NULL);
1203         if (IS_ERR(op_data))
1204                 RETURN(PTR_ERR(op_data));
1205
1206         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1207         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1208         err = md_rename(sbi->ll_md_exp, op_data,
1209                         src_name->name, src_name->len,
1210                         tgt_name->name, tgt_name->len, &request);
1211         ll_finish_md_op_data(op_data);
1212         if (!err) {
1213                 ll_update_times(request, src);
1214                 ll_update_times(request, tgt);
1215                 err = ll_objects_destroy(request, src);
1216         }
1217
1218         ptlrpc_req_finished(request);
1219
1220         RETURN(err);
1221 }
1222
1223 #ifdef HAVE_VFS_INTENT_PATCHES
1224 static int ll_mknod_raw(struct nameidata *nd, int mode, dev_t rdev)
1225 {
1226         return ll_mknod_generic(nd->dentry->d_inode, &nd->last, mode,rdev,NULL);
1227 }
1228 static int ll_rename_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1229 {
1230         return ll_rename_generic(srcnd->dentry->d_inode, srcnd->dentry,
1231                                  NULL, &srcnd->last,
1232                                  tgtnd->dentry->d_inode, tgtnd->dentry,
1233                                  NULL, &tgtnd->last);
1234 }
1235 static int ll_link_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1236 {
1237         return ll_link_generic(srcnd->dentry->d_inode, tgtnd->dentry->d_inode,
1238                                &tgtnd->last, NULL);
1239 }
1240 static int ll_symlink_raw(struct nameidata *nd, const char *tgt)
1241 {
1242         return ll_symlink_generic(nd->dentry->d_inode, &nd->last, tgt, NULL);
1243 }
1244 static int ll_rmdir_raw(struct nameidata *nd)
1245 {
1246         return ll_rmdir_generic(nd->dentry->d_inode, nd->dentry, NULL,
1247                                 &nd->last);
1248 }
1249 static int ll_mkdir_raw(struct nameidata *nd, int mode)
1250 {
1251         return ll_mkdir_generic(nd->dentry->d_inode, &nd->last, mode, NULL);
1252 }
1253 static int ll_unlink_raw(struct nameidata *nd)
1254 {
1255         return ll_unlink_generic(nd->dentry->d_inode, nd->dentry, NULL,
1256                                  &nd->last);
1257 }
1258 #endif
1259
1260 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1261                     ll_dev_t rdev)
1262 {
1263         return ll_mknod_generic(dir, &dchild->d_name, mode,
1264                                 old_encode_dev(rdev), dchild);
1265 }
1266
1267 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1268 {
1269         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1270 }
1271 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1272 {
1273         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1274 }
1275 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1276 {
1277         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1278 }
1279 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1280                       const char *oldname)
1281 {
1282         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1283 }
1284 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1285                    struct dentry *new_dentry)
1286 {
1287         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1288                                new_dentry);
1289 }
1290 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1291                      struct inode *new_dir, struct dentry *new_dentry)
1292 {
1293         int err;
1294         err = ll_rename_generic(old_dir, NULL,
1295                                  old_dentry, &old_dentry->d_name,
1296                                  new_dir, NULL, new_dentry,
1297                                  &new_dentry->d_name);
1298         if (!err) {
1299 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
1300                 if (!S_ISDIR(old_dentry->d_inode->i_mode))
1301 #endif
1302                         d_move(old_dentry, new_dentry);
1303         }
1304         return err;
1305 }
1306
1307 struct inode_operations ll_dir_inode_operations = {
1308 #ifdef HAVE_VFS_INTENT_PATCHES
1309         .link_raw           = ll_link_raw,
1310         .unlink_raw         = ll_unlink_raw,
1311         .symlink_raw        = ll_symlink_raw,
1312         .mkdir_raw          = ll_mkdir_raw,
1313         .rmdir_raw          = ll_rmdir_raw,
1314         .mknod_raw          = ll_mknod_raw,
1315         .rename_raw         = ll_rename_raw,
1316         .setattr            = ll_setattr,
1317         .setattr_raw        = ll_setattr_raw,
1318 #endif
1319         .mknod              = ll_mknod,
1320         .lookup             = ll_lookup_nd,
1321         .create             = ll_create_nd,
1322         /* We need all these non-raw things for NFSD, to not patch it. */
1323         .unlink             = ll_unlink,
1324         .mkdir              = ll_mkdir,
1325         .rmdir              = ll_rmdir,
1326         .symlink            = ll_symlink,
1327         .link               = ll_link,
1328         .rename             = ll_rename,
1329         .setattr            = ll_setattr,
1330         .getattr            = ll_getattr,
1331         .permission         = ll_inode_permission,
1332         .setxattr           = ll_setxattr,
1333         .getxattr           = ll_getxattr,
1334         .listxattr          = ll_listxattr,
1335         .removexattr        = ll_removexattr,
1336 };
1337
1338 struct inode_operations ll_special_inode_operations = {
1339 #ifdef HAVE_VFS_INTENT_PATCHES
1340         .setattr_raw    = ll_setattr_raw,
1341 #endif
1342         .setattr        = ll_setattr,
1343         .getattr        = ll_getattr,
1344         .permission     = ll_inode_permission,
1345         .setxattr       = ll_setxattr,
1346         .getxattr       = ll_getxattr,
1347         .listxattr      = ll_listxattr,
1348         .removexattr    = ll_removexattr,
1349 };