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  * Copyright (c) 2011 Whamcloud, Inc.
  33  *
  34  */
  35 /*
  36  * This file is part of Lustre, http://www.lustre.org/
  37  * Lustre is a trademark of Sun Microsystems, Inc.
  38  */
  39
  40 #include <linux/fs.h>
  41 #include <linux/sched.h>
  42 #include <linux/mm.h>
  43 #include <linux/smp_lock.h>
  44 #include <linux/quotaops.h>
  45 #include <linux/highmem.h>
  46 #include <linux/pagemap.h>
  47
  48 #define DEBUG_SUBSYSTEM S_LLITE
  49
  50 #include <obd_support.h>
  51 #include <lustre_fid.h>
  52 #include <lustre_lite.h>
  53 #include <lustre_dlm.h>
  54 #include <lustre_ver.h>
  55 #include <lustre_mdc.h>
  56 #include "llite_internal.h"
  57
  58 /*
  59  * Check if we have something mounted at the named dchild.
  60  * In such a case there would always be dentry present.
  61  */
  62 static int ll_d_mountpoint(struct dentry *dparent, struct dentry *dchild,
  63                            struct qstr *name)
  64 {
  65         int mounted = 0;
  66
  67         if (unlikely(dchild)) {
  68                 mounted = d_mountpoint(dchild);
  69         } else if (dparent) {
  70                 dchild = d_lookup(dparent, name);
  71                 if (dchild) {
  72                         mounted = d_mountpoint(dchild);
  73                         dput(dchild);
  74                 }
  75         }
  76         return mounted;
  77 }
  78
  79 int ll_unlock(__u32 mode, struct lustre_handle *lockh)
  80 {
  81         ENTRY;
  82
  83         ldlm_lock_decref(lockh, mode);
  84
  85         RETURN(0);
  86 }
  87
  88
  89 /* called from iget5_locked->find_inode() under inode_lock spinlock */
  90 static int ll_test_inode(struct inode *inode, void *opaque)
  91 {
  92         struct ll_inode_info *lli = ll_i2info(inode);
  93         struct lustre_md     *md = opaque;
  94
  95         if (unlikely(!(md->body->valid & OBD_MD_FLID))) {
  96                 CERROR("MDS body missing FID\n");
  97                 return 0;
  98         }
  99
 100         if (!lu_fid_eq(&lli->lli_fid, &md->body->fid1))
 101                 return 0;
 102
 103         return 1;
 104 }
 105
 106 static int ll_set_inode(struct inode *inode, void *opaque)
 107 {
 108         struct ll_inode_info *lli = ll_i2info(inode);
 109         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
 110
 111         if (unlikely(!(body->valid & OBD_MD_FLID))) {
 112                 CERROR("MDS body missing FID\n");
 113                 return -EINVAL;
 114         }
 115
 116         lli->lli_fid = body->fid1;
 117         return 0;
 118 }
 119
 120
 121 /*
 122  * Get an inode by inode number (already instantiated by the intent lookup).
 123  * Returns inode or NULL
 124  */
 125 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 126                       struct lustre_md *md)
 127 {
 128         struct inode         *inode;
 129         ENTRY;
 130
 131         LASSERT(hash != 0);
 132         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
 133
 134         if (inode) {
 135                 if (inode->i_state & I_NEW) {
 136                         int rc;
 137
 138                         ll_read_inode2(inode, md);
 139                         rc = cl_inode_init(inode, md);
 140                         if (rc != 0) {
 141                                 md->lsm = NULL;
 142                                 make_bad_inode(inode);
 143                                 unlock_new_inode(inode);
 144                                 iput(inode);
 145                                 inode = ERR_PTR(rc);
 146                         } else
 147                                 unlock_new_inode(inode);
 148                 } else if (!(inode->i_state & (I_FREEING | I_CLEAR)))
 149                                 ll_update_inode(inode, md);
 150                 CDEBUG(D_VFSTRACE, "got inode: %p for "DFID"\n",
 151                        inode, PFID(&md->body->fid1));
 152         }
 153         RETURN(inode);
 154 }
 155
 156 static void ll_drop_negative_dentry(struct inode *dir)
 157 {
 158         struct dentry *dentry, *tmp_alias, *tmp_subdir;
 159
 160         cfs_spin_lock(&ll_lookup_lock);
 161         spin_lock(&dcache_lock);
 162 restart:
 163         list_for_each_entry_safe(dentry, tmp_alias,
 164                                  &dir->i_dentry,d_alias) {
 165                 if (!list_empty(&dentry->d_subdirs)) {
 166                         struct dentry *child;
 167                         list_for_each_entry_safe(child, tmp_subdir,
 168                                                  &dentry->d_subdirs,
 169                                                  d_child) {
 170                                 /* XXX Print some debug here? */
 171                                 if (!child->d_inode)
 172                                 /* Negative dentry. If we were
 173                                    dropping dcache lock, go
 174                                    throught the list again */
 175                                         if (ll_drop_dentry(child))
 176                                                 goto restart;
 177                         }
 178                 }
 179         }
 180         spin_unlock(&dcache_lock);
 181         cfs_spin_unlock(&ll_lookup_lock);
 182 }
 183
 184
 185 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 186                        void *data, int flag)
 187 {
 188         int rc;
 189         struct lustre_handle lockh;
 190         ENTRY;
 191
 192         switch (flag) {
 193         case LDLM_CB_BLOCKING:
 194                 ldlm_lock2handle(lock, &lockh);
 195                 rc = ldlm_cli_cancel(&lockh);
 196                 if (rc < 0) {
 197                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 198                         RETURN(rc);
 199                 }
 200                 break;
 201         case LDLM_CB_CANCELING: {
 202                 struct inode *inode = ll_inode_from_lock(lock);
 203                 struct ll_inode_info *lli;
 204                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 205                 struct lu_fid *fid;
 206                 ldlm_mode_t mode = lock->l_req_mode;
 207
 208                 /* Invalidate all dentries associated with this inode */
 209                 if (inode == NULL)
 210                         break;
 211
 212                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
 213                 /* For OPEN locks we differentiate between lock modes - CR, CW. PR - bug 22891 */
 214                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE))
 215                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
 216
 217                 if (bits & MDS_INODELOCK_OPEN)
 218                         ll_have_md_lock(inode, &bits, mode);
 219
 220                 fid = ll_inode2fid(inode);
 221                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
 222                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
 223                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
 224                         LDLM_ERROR(lock, "data mismatch with object "
 225                                    DFID" (%p)", PFID(fid), inode);
 226                 }
 227
 228                 if (bits & MDS_INODELOCK_OPEN) {
 229                         int flags = 0;
 230                         switch (lock->l_req_mode) {
 231                         case LCK_CW:
 232                                 flags = FMODE_WRITE;
 233                                 break;
 234                         case LCK_PR:
 235                                 flags = FMODE_EXEC;
 236                                 break;
 237                         case LCK_CR:
 238                                 flags = FMODE_READ;
 239                                 break;
 240                         default:
 241                                 CERROR("Unexpected lock mode for OPEN lock "
 242                                        "%d, inode %ld\n", lock->l_req_mode,
 243                                        inode->i_ino);
 244                         }
 245                         ll_md_real_close(inode, flags);
 246                 }
 247
 248                 lli = ll_i2info(inode);
 249                 if (bits & MDS_INODELOCK_UPDATE)
 250                         lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 251
 252                 if (S_ISDIR(inode->i_mode) &&
 253                      (bits & MDS_INODELOCK_UPDATE)) {
 254                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 255                                inode->i_ino);
 256                         truncate_inode_pages(inode->i_mapping, 0);
 257                         ll_drop_negative_dentry(inode);
 258                 }
 259
 260                 if (inode->i_sb->s_root &&
 261                     inode != inode->i_sb->s_root->d_inode &&
 262                     (bits & MDS_INODELOCK_LOOKUP))
 263                         ll_unhash_aliases(inode);
 264                 iput(inode);
 265                 break;
 266         }
 267         default:
 268                 LBUG();
 269         }
 270
 271         RETURN(0);
 272 }
 273
 274 __u32 ll_i2suppgid(struct inode *i)
 275 {
 276         if (cfs_curproc_is_in_groups(i->i_gid))
 277                 return (__u32)i->i_gid;
 278         else
 279                 return (__u32)(-1);
 280 }
 281
 282 /* Pack the required supplementary groups into the supplied groups array.
 283  * If we don't need to use the groups from the target inode(s) then we
 284  * instead pack one or more groups from the user's supplementary group
 285  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 286 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 287 {
 288 #if 0
 289         int i;
 290 #endif
 291
 292         LASSERT(i1 != NULL);
 293         LASSERT(suppgids != NULL);
 294
 295         suppgids[0] = ll_i2suppgid(i1);
 296
 297         if (i2)
 298                 suppgids[1] = ll_i2suppgid(i2);
 299                 else
 300                         suppgids[1] = -1;
 301
 302 #if 0
 303         for (i = 0; i < current_ngroups; i++) {
 304                 if (suppgids[0] == -1) {
 305                         if (current_groups[i] != suppgids[1])
 306                                 suppgids[0] = current_groups[i];
 307                         continue;
 308                 }
 309                 if (suppgids[1] == -1) {
 310                         if (current_groups[i] != suppgids[0])
 311                                 suppgids[1] = current_groups[i];
 312                         continue;
 313                 }
 314                 break;
 315         }
 316 #endif
 317 }
 318
 319 static void ll_d_add(struct dentry *de, struct inode *inode)
 320 {
 321         CDEBUG(D_DENTRY, "adding inode %p to dentry %p\n", inode, de);
 322         /* d_instantiate */
 323         if (!list_empty(&de->d_alias)) {
 324                 spin_unlock(&dcache_lock);
 325                 CERROR("dentry %.*s %p alias next %p, prev %p\n",
 326                        de->d_name.len, de->d_name.name, de,
 327                        de->d_alias.next, de->d_alias.prev);
 328                 LBUG();
 329         }
 330         if (inode)
 331                 list_add(&de->d_alias, &inode->i_dentry);
 332         de->d_inode = inode;
 333
 334         /* d_rehash */
 335         if (!d_unhashed(de)) {
 336                 spin_unlock(&dcache_lock);
 337                 CERROR("dentry %.*s %p hash next %p\n",
 338                        de->d_name.len, de->d_name.name, de, de->d_hash.next);
 339                 LBUG();
 340         }
 341         d_rehash_cond(de, 0);
 342 }
 343
 344 /* Search "inode"'s alias list for a dentry that has the same name and parent
 345  * as de.  If found, return it.  If not found, return de.
 346  * Lustre can't use d_add_unique because don't unhash aliases for directory
 347  * in ll_revalidate_it.  After revaliadate inode will be have hashed aliases
 348  * and it triggers BUG_ON in d_instantiate_unique (bug #10954).
 349  */
 350 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *de)
 351 {
 352         struct list_head *tmp;
 353         struct dentry *dentry;
 354         struct dentry *last_discon = NULL;
 355
 356         cfs_spin_lock(&ll_lookup_lock);
 357         spin_lock(&dcache_lock);
 358         list_for_each(tmp, &inode->i_dentry) {
 359                 dentry = list_entry(tmp, struct dentry, d_alias);
 360
 361                 /* We are called here with 'de' already on the aliases list. */
 362                 if (unlikely(dentry == de)) {
 363                         CERROR("whoops\n");
 364                         continue;
 365                 }
 366
 367                 if (dentry->d_flags & DCACHE_DISCONNECTED) {
 368                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
 369                         last_discon = dentry;
 370                         continue;
 371                 }
 372
 373                 if (dentry->d_parent != de->d_parent)
 374                         continue;
 375
 376                 if (dentry->d_name.hash != de->d_name.hash)
 377                         continue;
 378
 379                 if (dentry->d_name.len != de->d_name.len)
 380                         continue;
 381
 382                 if (memcmp(dentry->d_name.name, de->d_name.name,
 383                            de->d_name.len) != 0)
 384                         continue;
 385
 386                 dget_locked(dentry);
 387                 lock_dentry(dentry);
 388                 __d_drop(dentry);
 389                 unlock_dentry(dentry);
 390                 ll_dops_init(dentry, 0, 1);
 391                 d_rehash_cond(dentry, 0); /* avoid taking dcache_lock inside */
 392                 spin_unlock(&dcache_lock);
 393                 cfs_spin_unlock(&ll_lookup_lock);
 394                 iput(inode);
 395                 CDEBUG(D_DENTRY, "alias dentry %.*s (%p) parent %p inode %p "
 396                        "refc %d\n", de->d_name.len, de->d_name.name, de,
 397                        de->d_parent, de->d_inode, atomic_read(&de->d_count));
 398                 return dentry;
 399         }
 400
 401         if (last_discon) {
 402                 CDEBUG(D_DENTRY, "Reuse disconnected dentry %p inode %p "
 403                         "refc %d\n", last_discon, last_discon->d_inode,
 404                         atomic_read(&last_discon->d_count));
 405                 dget_locked(last_discon);
 406                 lock_dentry(last_discon);
 407                 last_discon->d_flags |= DCACHE_LUSTRE_INVALID;
 408                 unlock_dentry(last_discon);
 409                 spin_unlock(&dcache_lock);
 410                 cfs_spin_unlock(&ll_lookup_lock);
 411                 ll_dops_init(last_discon, 1, 1);
 412                 d_rehash(de);
 413                 d_move(last_discon, de);
 414                 iput(inode);
 415                 return last_discon;
 416         }
 417         lock_dentry(de);
 418         de->d_flags |= DCACHE_LUSTRE_INVALID;
 419         unlock_dentry(de);
 420         ll_d_add(de, inode);
 421
 422         spin_unlock(&dcache_lock);
 423         cfs_spin_unlock(&ll_lookup_lock);
 424
 425         return de;
 426 }
 427
 428 int ll_lookup_it_finish(struct ptlrpc_request *request,
 429                         struct lookup_intent *it, void *data)
 430 {
 431         struct it_cb_data *icbd = data;
 432         struct dentry **de = icbd->icbd_childp;
 433         struct inode *parent = icbd->icbd_parent;
 434         struct ll_sb_info *sbi = ll_i2sbi(parent);
 435         struct inode *inode = NULL;
 436         int rc;
 437         ENTRY;
 438
 439         /* NB 1 request reference will be taken away by ll_intent_lock()
 440          * when I return */
 441         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 442                 struct dentry *save = *de;
 443                 __u32 bits;
 444
 445                 rc = ll_prep_inode(&inode, request, (*de)->d_sb);
 446                 if (rc)
 447                         RETURN(rc);
 448
 449                 CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
 450                        inode, inode->i_ino, inode->i_generation);
 451                 md_set_lock_data(sbi->ll_md_exp,
 452                                  &it->d.lustre.it_lock_handle, inode, &bits);
 453
 454                 /* We used to query real size from OSTs here, but actually
 455                    this is not needed. For stat() calls size would be updated
 456                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 457                    2.4 and
 458                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 459                    Everybody else who needs correct file size would call
 460                    cl_glimpse_size or some equivalent themselves anyway.
 461                    Also see bug 7198. */
 462                 ll_dops_init(*de, 1, 1);
 463                 *de = ll_find_alias(inode, *de);
 464                 if (*de != save) {
 465                         struct ll_dentry_data *lld = ll_d2d(*de);
 466
 467                         /* just make sure the ll_dentry_data is ready */
 468                         if (unlikely(lld == NULL))
 469                                 ll_dops_init(*de, 1, 1);
 470                 }
 471                 /* we have lookup look - unhide dentry */
 472                 if (bits & MDS_INODELOCK_LOOKUP) {
 473                         lock_dentry(*de);
 474                         (*de)->d_flags &= ~DCACHE_LUSTRE_INVALID;
 475                         unlock_dentry(*de);
 476                 }
 477         } else {
 478                 __u64 ibits;
 479
 480                 ll_dops_init(*de, 1, 1);
 481                 /* Check that parent has UPDATE lock. If there is none, we
 482                    cannot afford to hash this dentry (done by ll_d_add) as it
 483                    might get picked up later when UPDATE lock will appear */
 484                 ibits = MDS_INODELOCK_UPDATE;
 485                 if (ll_have_md_lock(parent, &ibits, LCK_MINMODE)) {
 486                         spin_lock(&dcache_lock);
 487                         ll_d_add(*de, NULL);
 488                         spin_unlock(&dcache_lock);
 489                 } else {
 490                         /* negative lookup - and don't have update lock to
 491                          * parent */
 492                         lock_dentry(*de);
 493                         (*de)->d_flags |= DCACHE_LUSTRE_INVALID;
 494                         unlock_dentry(*de);
 495
 496                         (*de)->d_inode = NULL;
 497                         /* We do not want to hash the dentry if don`t have a
 498                          * lock, but if this dentry is later used in d_move,
 499                          * we'd hit uninitialised list head d_hash, so we just
 500                          * do this to init d_hash field but leave dentry
 501                          * unhashed. (bug 10796). */
 502                         d_rehash(*de);
 503                         d_drop(*de);
 504                 }
 505         }
 506
 507         RETURN(0);
 508 }
 509
 510 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 511                                    struct lookup_intent *it, int lookup_flags)
 512 {
 513         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 514         struct dentry *save = dentry, *retval;
 515         struct ptlrpc_request *req = NULL;
 516         struct md_op_data *op_data;
 517         struct it_cb_data icbd;
 518         __u32 opc;
 519         int rc, first = 0;
 520         ENTRY;
 521
 522         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 523                 RETURN(ERR_PTR(-ENAMETOOLONG));
 524
 525         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 526                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 527                parent->i_generation, parent, LL_IT2STR(it));
 528
 529         if (d_mountpoint(dentry))
 530                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 531
 532         ll_frob_intent(&it, &lookup_it);
 533
 534         /* As do_lookup is called before follow_mount, root dentry may be left
 535          * not valid, revalidate it here. */
 536         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
 537             (it->it_op & (IT_OPEN | IT_CREAT))) {
 538                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it,
 539                                             MDS_INODELOCK_LOOKUP);
 540                 if (rc)
 541                         RETURN(ERR_PTR(rc));
 542         }
 543
 544         if (it->it_op == IT_GETATTR) {
 545                 first = ll_statahead_enter(parent, &dentry, 1);
 546                 if (first >= 0) {
 547                         ll_statahead_exit(parent, dentry, first);
 548                         if (first == 1)
 549                                 RETURN(retval = dentry);
 550                 }
 551         }
 552
 553         icbd.icbd_childp = &dentry;
 554         icbd.icbd_parent = parent;
 555
 556         if (it->it_op & IT_CREAT ||
 557             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
 558                 opc = LUSTRE_OPC_CREATE;
 559         else
 560                 opc = LUSTRE_OPC_ANY;
 561
 562         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 563                                      dentry->d_name.len, lookup_flags, opc,
 564                                      NULL);
 565         if (IS_ERR(op_data))
 566                 RETURN((void *)op_data);
 567
 568         it->it_create_mode &= ~cfs_curproc_umask();
 569
 570         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 571                             lookup_flags, &req, ll_md_blocking_ast, 0);
 572         ll_finish_md_op_data(op_data);
 573         if (rc < 0)
 574                 GOTO(out, retval = ERR_PTR(rc));
 575
 576         rc = ll_lookup_it_finish(req, it, &icbd);
 577         if (rc != 0) {
 578                 ll_intent_release(it);
 579                 GOTO(out, retval = ERR_PTR(rc));
 580         }
 581
 582         if (first == -EEXIST)
 583                 ll_statahead_mark(parent, dentry);
 584
 585         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 586             !S_ISREG(dentry->d_inode->i_mode) &&
 587             !S_ISDIR(dentry->d_inode->i_mode)) {
 588                 ll_release_openhandle(dentry, it);
 589         }
 590         ll_lookup_finish_locks(it, dentry);
 591
 592         if (dentry == save)
 593                 GOTO(out, retval = NULL);
 594         else
 595                 GOTO(out, retval = dentry);
 596  out:
 597         if (req)
 598                 ptlrpc_req_finished(req);
 599         return retval;
 600 }
 601
 602 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
 603                                         int lookup_flags)
 604 {
 605         struct lookup_intent *it;
 606
 607         OBD_ALLOC(it, sizeof(*it));
 608         if (!it)
 609                 return ERR_PTR(-ENOMEM);
 610
 611         if (lookup_flags & LOOKUP_OPEN) {
 612                 it->it_op = IT_OPEN;
 613                 if (lookup_flags & LOOKUP_CREATE)
 614                         it->it_op |= IT_CREAT;
 615                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
 616                 it->it_flags = oit->flags;
 617         } else {
 618                 it->it_op = IT_GETATTR;
 619         }
 620
 621 #ifndef HAVE_FILE_IN_STRUCT_INTENT
 622                 /* Since there is no way to pass our intent to ll_file_open,
 623                  * just check the file is there. Actual open will be done
 624                  * in ll_file_open */
 625                 if (it->it_op & IT_OPEN)
 626                         it->it_op = IT_LOOKUP;
 627 #endif
 628
 629         return it;
 630 }
 631
 632 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 633                                    struct nameidata *nd)
 634 {
 635         struct dentry *de;
 636         ENTRY;
 637
 638         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
 639                 struct lookup_intent *it;
 640
 641 #if defined(HAVE_FILE_IN_STRUCT_INTENT) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 642                 /* Did we came here from failed revalidate just to propagate
 643                  * its error? */
 644                 if (nd->flags & LOOKUP_OPEN)
 645                         if (IS_ERR(nd->intent.open.file))
 646                                 RETURN((struct dentry *)nd->intent.open.file);
 647 #endif
 648                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
 649                         it = ll_d2d(dentry)->lld_it;
 650                         ll_d2d(dentry)->lld_it = NULL;
 651                 } else {
 652                         if ((nd->flags & LOOKUP_CREATE ) && !(nd->flags & LOOKUP_OPEN)) {
 653                                 /* We are sure this is new dentry, so we need to create
 654                                    our private data and set the dentry ops */
 655                                 ll_dops_init(dentry, 1, 1);
 656                                 RETURN(NULL);
 657                         }
 658                         it = ll_convert_intent(&nd->intent.open, nd->flags);
 659                         if (IS_ERR(it))
 660                                 RETURN((struct dentry *)it);
 661                 }
 662
 663                 de = ll_lookup_it(parent, dentry, it, nd->flags);
 664                 if (de)
 665                         dentry = de;
 666                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
 667                         if (dentry->d_inode &&
 668                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
 669 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 670                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
 671                                         // We cannot call open here as it would
 672                                         // deadlock.
 673                                         ptlrpc_req_finished(
 674                                                        (struct ptlrpc_request *)
 675                                                           it->d.lustre.it_data);
 676                                 } else {
 677 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 678 /* 2.6.1[456] have a bug in open_namei() that forgets to check
 679  * nd->intent.open.file for error, so we need to return it as lookup's result
 680  * instead */
 681                                         struct file *filp;
 682                                         nd->intent.open.file->private_data = it;
 683                                         filp =lookup_instantiate_filp(nd,dentry,
 684                                                                       NULL);
 685                                         if (IS_ERR(filp)) {
 686                                                 if (de)
 687                                                         dput(de);
 688                                                 de = (struct dentry *) filp;
 689                                         }
 690 #else
 691                                         nd->intent.open.file->private_data = it;
 692                                         (void)lookup_instantiate_filp(nd,dentry,
 693                                                                       NULL);
 694 #endif
 695
 696                                 }
 697 #else /* HAVE_FILE_IN_STRUCT_INTENT */
 698                                 /* Release open handle as we have no way to
 699                                  * pass it to ll_file_open */
 700                                 ll_release_openhandle(dentry, it);
 701 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
 702                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
 703                                 // XXX This can only reliably work on assumption
 704                                 // that there are NO hashed negative dentries.
 705                                 ll_d2d(dentry)->lld_it = it;
 706                                 it = NULL; /* Will be freed in ll_create_nd */
 707                                 /* We absolutely depend on ll_create_nd to be
 708                                  * called to not leak this intent and possible
 709                                  * data attached to it */
 710                         }
 711                 }
 712
 713                 if (it) {
 714                         ll_intent_release(it);
 715                         OBD_FREE(it, sizeof(*it));
 716                 }
 717         } else {
 718                 de = ll_lookup_it(parent, dentry, NULL, 0);
 719         }
 720
 721         RETURN(de);
 722 }
 723
 724 /* We depend on "mode" being set with the proper file type/umask by now */
 725 static struct inode *ll_create_node(struct inode *dir, const char *name,
 726                                     int namelen, const void *data, int datalen,
 727                                     int mode, __u64 extra,
 728                                     struct lookup_intent *it)
 729 {
 730         struct inode *inode = NULL;
 731         struct ptlrpc_request *request = NULL;
 732         struct ll_sb_info *sbi = ll_i2sbi(dir);
 733         int rc;
 734         ENTRY;
 735
 736         LASSERT(it && it->d.lustre.it_disposition);
 737
 738         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 739         request = it->d.lustre.it_data;
 740         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 741         rc = ll_prep_inode(&inode, request, dir->i_sb);
 742         if (rc)
 743                 GOTO(out, inode = ERR_PTR(rc));
 744
 745         LASSERT(list_empty(&inode->i_dentry));
 746
 747         /* We asked for a lock on the directory, but were granted a
 748          * lock on the inode.  Since we finally have an inode pointer,
 749          * stuff it in the lock. */
 750         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 751                inode, inode->i_ino, inode->i_generation);
 752         md_set_lock_data(sbi->ll_md_exp,
 753                          &it->d.lustre.it_lock_handle, inode, NULL);
 754         EXIT;
 755  out:
 756         ptlrpc_req_finished(request);
 757         return inode;
 758 }
 759
 760 /*
 761  * By the time this is called, we already have created the directory cache
 762  * entry for the new file, but it is so far negative - it has no inode.
 763  *
 764  * We defer creating the OBD object(s) until open, to keep the intent and
 765  * non-intent code paths similar, and also because we do not have the MDS
 766  * inode number before calling ll_create_node() (which is needed for LOV),
 767  * so we would need to do yet another RPC to the MDS to store the LOV EA
 768  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 769  * lmm_size in datalen (the MDS still has code which will handle that).
 770  *
 771  * If the create succeeds, we fill in the inode information
 772  * with d_instantiate().
 773  */
 774 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 775                         struct lookup_intent *it)
 776 {
 777         struct inode *inode;
 778         int rc = 0;
 779         ENTRY;
 780
 781         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 782                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 783                dir->i_generation, dir, LL_IT2STR(it));
 784
 785         rc = it_open_error(DISP_OPEN_CREATE, it);
 786         if (rc)
 787                 RETURN(rc);
 788
 789         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
 790                                NULL, 0, mode, 0, it);
 791         if (IS_ERR(inode))
 792                 RETURN(PTR_ERR(inode));
 793
 794         d_instantiate(dentry, inode);
 795         /* Negative dentry may be unhashed if parent does not have UPDATE lock,
 796          * but some callers, e.g. do_coredump, expect dentry to be hashed after
 797          * successful create. Hash it here. */
 798         spin_lock(&dcache_lock);
 799         if (d_unhashed(dentry))
 800                 d_rehash_cond(dentry, 0);
 801         spin_unlock(&dcache_lock);
 802         RETURN(0);
 803 }
 804
 805 static void ll_update_times(struct ptlrpc_request *request,
 806                             struct inode *inode)
 807 {
 808         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 809                                                        &RMF_MDT_BODY);
 810
 811         LASSERT(body);
 812         if (body->valid & OBD_MD_FLMTIME &&
 813             body->mtime > LTIME_S(inode->i_mtime)) {
 814                 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to "LPU64"\n",
 815                        inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
 816                 LTIME_S(inode->i_mtime) = body->mtime;
 817         }
 818         if (body->valid & OBD_MD_FLCTIME &&
 819             body->ctime > LTIME_S(inode->i_ctime))
 820                 LTIME_S(inode->i_ctime) = body->ctime;
 821 }
 822
 823 static int ll_new_node(struct inode *dir, struct qstr *name,
 824                        const char *tgt, int mode, int rdev,
 825                        struct dentry *dchild, __u32 opc)
 826 {
 827         struct ptlrpc_request *request = NULL;
 828         struct md_op_data *op_data;
 829         struct inode *inode = NULL;
 830         struct ll_sb_info *sbi = ll_i2sbi(dir);
 831         int tgt_len = 0;
 832         int err;
 833
 834         ENTRY;
 835         if (unlikely(tgt != NULL))
 836                 tgt_len = strlen(tgt) + 1;
 837
 838         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 839                                      name->len, 0, opc, NULL);
 840         if (IS_ERR(op_data))
 841                 GOTO(err_exit, err = PTR_ERR(op_data));
 842
 843         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 844                         cfs_curproc_fsuid(), cfs_curproc_fsgid(),
 845                         cfs_curproc_cap_pack(), rdev, &request);
 846         ll_finish_md_op_data(op_data);
 847         if (err)
 848                 GOTO(err_exit, err);
 849
 850         ll_update_times(request, dir);
 851
 852         if (dchild) {
 853                 err = ll_prep_inode(&inode, request, dchild->d_sb);
 854                 if (err)
 855                      GOTO(err_exit, err);
 856
 857                 d_drop(dchild);
 858                 d_instantiate(dchild, inode);
 859         }
 860         EXIT;
 861 err_exit:
 862         ptlrpc_req_finished(request);
 863
 864         return err;
 865 }
 866
 867 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 868                             unsigned rdev, struct dentry *dchild)
 869 {
 870         int err;
 871         ENTRY;
 872
 873         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 874                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 875                mode, rdev);
 876
 877         mode &= ~cfs_curproc_umask();
 878
 879         switch (mode & S_IFMT) {
 880         case 0:
 881                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 882         case S_IFREG:
 883         case S_IFCHR:
 884         case S_IFBLK:
 885         case S_IFIFO:
 886         case S_IFSOCK:
 887                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 888                                   LUSTRE_OPC_MKNOD);
 889                 break;
 890         case S_IFDIR:
 891                 err = -EPERM;
 892                 break;
 893         default:
 894                 err = -EINVAL;
 895         }
 896         RETURN(err);
 897 }
 898
 899 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 900                         int mode, struct nameidata *nd)
 901 {
 902         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
 903         int rc;
 904
 905         if (!it)
 906                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 907
 908         ll_d2d(dentry)->lld_it = NULL;
 909
 910         /* Was there an error? Propagate it! */
 911         if (it->d.lustre.it_status) {
 912                 rc = it->d.lustre.it_status;
 913                 goto out;
 914         }
 915
 916         rc = ll_create_it(dir, dentry, mode, it);
 917 #ifdef HAVE_FILE_IN_STRUCT_INTENT
 918         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
 919                 nd->intent.open.file->private_data = it;
 920                 lookup_instantiate_filp(nd, dentry, NULL);
 921         }
 922 #else
 923         ll_release_openhandle(dentry,it);
 924 #endif
 925
 926 out:
 927         ll_intent_release(it);
 928         OBD_FREE(it, sizeof(*it));
 929
 930         return rc;
 931 }
 932
 933 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 934                               const char *tgt, struct dentry *dchild)
 935 {
 936         int err;
 937         ENTRY;
 938
 939         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 940                name->len, name->name, dir->i_ino, dir->i_generation,
 941                dir, 3000, tgt);
 942
 943         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 944                           0, dchild, LUSTRE_OPC_SYMLINK);
 945         RETURN(err);
 946 }
 947
 948 static int ll_link_generic(struct inode *src,  struct inode *dir,
 949                            struct qstr *name, struct dentry *dchild)
 950 {
 951         struct ll_sb_info *sbi = ll_i2sbi(dir);
 952         struct ptlrpc_request *request = NULL;
 953         struct md_op_data *op_data;
 954         int err;
 955
 956         ENTRY;
 957         CDEBUG(D_VFSTRACE,
 958                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
 959                src->i_ino, src->i_generation, src, dir->i_ino,
 960                dir->i_generation, dir, name->len, name->name);
 961
 962         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
 963                                      0, LUSTRE_OPC_ANY, NULL);
 964         if (IS_ERR(op_data))
 965                 RETURN(PTR_ERR(op_data));
 966
 967         err = md_link(sbi->ll_md_exp, op_data, &request);
 968         ll_finish_md_op_data(op_data);
 969         if (err)
 970                 GOTO(out, err);
 971         if (dchild)
 972                 d_drop(dchild);
 973
 974         ll_update_times(request, dir);
 975         EXIT;
 976 out:
 977         ptlrpc_req_finished(request);
 978         RETURN(err);
 979 }
 980
 981 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
 982                             int mode, struct dentry *dchild)
 983
 984 {
 985         int err;
 986         ENTRY;
 987
 988         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 989                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 990
 991         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~cfs_curproc_umask()) | S_IFDIR;
 992         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
 993
 994         RETURN(err);
 995 }
 996
 997 /* Try to find the child dentry by its name.
 998    If found, put the result fid into @fid. */
 999 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
1000                              struct lu_fid *fid)
1001 {
1002         struct dentry *parent, *child;
1003
1004         parent = list_entry(dir->i_dentry.next, struct dentry, d_alias);
1005         child = d_lookup(parent, name);
1006         if (child) {
1007                 if (child->d_inode)
1008                         *fid = *ll_inode2fid(child->d_inode);
1009                 dput(child);
1010         }
1011 }
1012
1013 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1014                             struct dentry *dchild, struct qstr *name)
1015 {
1016         struct ptlrpc_request *request = NULL;
1017         struct md_op_data *op_data;
1018         int rc;
1019         ENTRY;
1020
1021         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1022                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1023
1024         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1025                 RETURN(-EBUSY);
1026
1027         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1028                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1029         if (IS_ERR(op_data))
1030                 RETURN(PTR_ERR(op_data));
1031
1032         ll_get_child_fid(dir, name, &op_data->op_fid3);
1033         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1034         ll_finish_md_op_data(op_data);
1035         if (rc == 0)
1036                 ll_update_times(request, dir);
1037         ptlrpc_req_finished(request);
1038         RETURN(rc);
1039 }
1040
1041 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1042 {
1043         struct mdt_body *body;
1044         struct lov_mds_md *eadata;
1045         struct lov_stripe_md *lsm = NULL;
1046         struct obd_trans_info oti = { 0 };
1047         struct obdo *oa;
1048         struct obd_capa *oc = NULL;
1049         int rc;
1050         ENTRY;
1051
1052         /* req is swabbed so this is safe */
1053         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1054         if (!(body->valid & OBD_MD_FLEASIZE))
1055                 RETURN(0);
1056
1057         if (body->eadatasize == 0) {
1058                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1059                 GOTO(out, rc = -EPROTO);
1060         }
1061
1062         /* The MDS sent back the EA because we unlinked the last reference
1063          * to this file. Use this EA to unlink the objects on the OST.
1064          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1065          * check it is complete and sensible. */
1066         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1067                                               body->eadatasize);
1068         LASSERT(eadata != NULL);
1069
1070         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1071         if (rc < 0) {
1072                 CERROR("obd_unpackmd: %d\n", rc);
1073                 GOTO(out, rc);
1074         }
1075         LASSERT(rc >= sizeof(*lsm));
1076
1077         OBDO_ALLOC(oa);
1078         if (oa == NULL)
1079                 GOTO(out_free_memmd, rc = -ENOMEM);
1080
1081         oa->o_id = lsm->lsm_object_id;
1082         oa->o_seq = lsm->lsm_object_seq;
1083         oa->o_mode = body->mode & S_IFMT;
1084         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1085
1086         if (body->valid & OBD_MD_FLCOOKIE) {
1087                 oa->o_valid |= OBD_MD_FLCOOKIE;
1088                 oti.oti_logcookies =
1089                         req_capsule_server_sized_get(&request->rq_pill,
1090                                                      &RMF_LOGCOOKIES,
1091                                                    sizeof(struct llog_cookie) *
1092                                                      lsm->lsm_stripe_count);
1093                 if (oti.oti_logcookies == NULL) {
1094                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1095                         body->valid &= ~OBD_MD_FLCOOKIE;
1096                 }
1097         }
1098
1099         if (body->valid & OBD_MD_FLOSSCAPA) {
1100                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1101                 if (rc)
1102                         GOTO(out_free_memmd, rc);
1103         }
1104
1105         rc = obd_destroy(ll_i2dtexp(dir), oa, lsm, &oti, ll_i2mdexp(dir), oc);
1106         capa_put(oc);
1107         OBDO_FREE(oa);
1108         if (rc)
1109                 CERROR("obd destroy objid "LPX64" error %d\n",
1110                        lsm->lsm_object_id, rc);
1111  out_free_memmd:
1112         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1113  out:
1114         return rc;
1115 }
1116
1117 /* ll_unlink_generic() doesn't update the inode with the new link count.
1118  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
1119  * is any lock existing. They will recycle dentries and inodes based upon locks
1120  * too. b=20433 */
1121 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1122                              struct dentry *dchild, struct qstr *name)
1123 {
1124         struct ptlrpc_request *request = NULL;
1125         struct md_op_data *op_data;
1126         int rc;
1127         ENTRY;
1128         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1129                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1130
1131         /*
1132          * XXX: unlink bind mountpoint maybe call to here,
1133          * just check it as vfs_unlink does.
1134          */
1135         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1136                 RETURN(-EBUSY);
1137
1138         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1139                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1140         if (IS_ERR(op_data))
1141                 RETURN(PTR_ERR(op_data));
1142
1143         ll_get_child_fid(dir, name, &op_data->op_fid3);
1144         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1145         ll_finish_md_op_data(op_data);
1146         if (rc)
1147                 GOTO(out, rc);
1148
1149         ll_update_times(request, dir);
1150
1151         rc = ll_objects_destroy(request, dir);
1152  out:
1153         ptlrpc_req_finished(request);
1154         RETURN(rc);
1155 }
1156
1157 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1158                              struct dentry *src_dchild, struct qstr *src_name,
1159                              struct inode *tgt, struct dentry *tgt_dparent,
1160                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1161 {
1162         struct ptlrpc_request *request = NULL;
1163         struct ll_sb_info *sbi = ll_i2sbi(src);
1164         struct md_op_data *op_data;
1165         int err;
1166         ENTRY;
1167         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1168                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1169                src->i_ino, src->i_generation, src, tgt_name->len,
1170                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1171
1172         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1173             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1174                 RETURN(-EBUSY);
1175
1176         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1177                                      LUSTRE_OPC_ANY, NULL);
1178         if (IS_ERR(op_data))
1179                 RETURN(PTR_ERR(op_data));
1180
1181         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1182         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1183         err = md_rename(sbi->ll_md_exp, op_data,
1184                         src_name->name, src_name->len,
1185                         tgt_name->name, tgt_name->len, &request);
1186         ll_finish_md_op_data(op_data);
1187         if (!err) {
1188                 ll_update_times(request, src);
1189                 ll_update_times(request, tgt);
1190                 err = ll_objects_destroy(request, src);
1191         }
1192
1193         ptlrpc_req_finished(request);
1194
1195         RETURN(err);
1196 }
1197
1198 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1199                     ll_dev_t rdev)
1200 {
1201         return ll_mknod_generic(dir, &dchild->d_name, mode,
1202                                 old_encode_dev(rdev), dchild);
1203 }
1204
1205 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1206 {
1207         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1208 }
1209 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1210 {
1211         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1212 }
1213 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1214 {
1215         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1216 }
1217 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1218                       const char *oldname)
1219 {
1220         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1221 }
1222 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1223                    struct dentry *new_dentry)
1224 {
1225         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1226                                new_dentry);
1227 }
1228 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1229                      struct inode *new_dir, struct dentry *new_dentry)
1230 {
1231         int err;
1232         err = ll_rename_generic(old_dir, NULL,
1233                                  old_dentry, &old_dentry->d_name,
1234                                  new_dir, NULL, new_dentry,
1235                                  &new_dentry->d_name);
1236         if (!err) {
1237 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
1238                 if (!S_ISDIR(old_dentry->d_inode->i_mode))
1239 #endif
1240                         d_move(old_dentry, new_dentry);
1241         }
1242         return err;
1243 }
1244
1245 struct inode_operations ll_dir_inode_operations = {
1246         .mknod              = ll_mknod,
1247         .lookup             = ll_lookup_nd,
1248         .create             = ll_create_nd,
1249         /* We need all these non-raw things for NFSD, to not patch it. */
1250         .unlink             = ll_unlink,
1251         .mkdir              = ll_mkdir,
1252         .rmdir              = ll_rmdir,
1253         .symlink            = ll_symlink,
1254         .link               = ll_link,
1255         .rename             = ll_rename,
1256         .setattr            = ll_setattr,
1257         .getattr            = ll_getattr,
1258         .permission         = ll_inode_permission,
1259         .setxattr           = ll_setxattr,
1260         .getxattr           = ll_getxattr,
1261         .listxattr          = ll_listxattr,
1262         .removexattr        = ll_removexattr,
1263 };
1264
1265 struct inode_operations ll_special_inode_operations = {
1266         .setattr        = ll_setattr,
1267         .getattr        = ll_getattr,
1268         .permission     = ll_inode_permission,
1269         .setxattr       = ll_setxattr,
1270         .getxattr       = ll_getxattr,
1271         .listxattr      = ll_listxattr,
1272         .removexattr    = ll_removexattr,
1273 };