drivers/staging/lustre/lustre/llite/namei.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  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/quotaops.h>
  41 #include <linux/highmem.h>
  42 #include <linux/pagemap.h>
  43 #include <linux/security.h>
  44
  45 #define DEBUG_SUBSYSTEM S_LLITE
  46
  47 #include "../include/obd_support.h"
  48 #include "../include/lustre_fid.h"
  49 #include "../include/lustre_lite.h"
  50 #include "../include/lustre_dlm.h"
  51 #include "../include/lustre_ver.h"
  52 #include "llite_internal.h"
  53
  54 static int ll_create_it(struct inode *, struct dentry *,
  55                         int, struct lookup_intent *);
  56
  57 /*
  58  * Check if we have something mounted at the named dchild.
  59  * In such a case there would always be dentry present.
  60  */
  61 static int ll_d_mountpoint(struct dentry *dparent, struct dentry *dchild,
  62                            struct qstr *name)
  63 {
  64         int mounted = 0;
  65
  66         if (unlikely(dchild)) {
  67                 mounted = d_mountpoint(dchild);
  68         } else if (dparent) {
  69                 dchild = d_lookup(dparent, name);
  70                 if (dchild) {
  71                         mounted = d_mountpoint(dchild);
  72                         dput(dchild);
  73                 }
  74         }
  75         return mounted;
  76 }
  77
  78 /* called from iget5_locked->find_inode() under inode_hash_lock spinlock */
  79 static int ll_test_inode(struct inode *inode, void *opaque)
  80 {
  81         struct ll_inode_info *lli = ll_i2info(inode);
  82         struct lustre_md     *md = opaque;
  83
  84         if (unlikely(!(md->body->valid & OBD_MD_FLID))) {
  85                 CERROR("MDS body missing FID\n");
  86                 return 0;
  87         }
  88
  89         if (!lu_fid_eq(&lli->lli_fid, &md->body->fid1))
  90                 return 0;
  91
  92         return 1;
  93 }
  94
  95 static int ll_set_inode(struct inode *inode, void *opaque)
  96 {
  97         struct ll_inode_info *lli = ll_i2info(inode);
  98         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
  99
 100         if (unlikely(!(body->valid & OBD_MD_FLID))) {
 101                 CERROR("MDS body missing FID\n");
 102                 return -EINVAL;
 103         }
 104
 105         lli->lli_fid = body->fid1;
 106         if (unlikely(!(body->valid & OBD_MD_FLTYPE))) {
 107                 CERROR("Can not initialize inode "DFID" without object type: "
 108                        "valid = %#llx\n", PFID(&lli->lli_fid), body->valid);
 109                 return -EINVAL;
 110         }
 111
 112         inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mode & S_IFMT);
 113         if (unlikely(inode->i_mode == 0)) {
 114                 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
 115                 return -EINVAL;
 116         }
 117
 118         ll_lli_init(lli);
 119
 120         return 0;
 121 }
 122
 123
 124 /*
 125  * Get an inode by inode number (already instantiated by the intent lookup).
 126  * Returns inode or NULL
 127  */
 128 struct inode *ll_iget(struct super_block *sb, ino_t hash,
 129                       struct lustre_md *md)
 130 {
 131         struct inode     *inode;
 132
 133         LASSERT(hash != 0);
 134         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
 135
 136         if (inode) {
 137                 if (inode->i_state & I_NEW) {
 138                         int rc = 0;
 139
 140                         ll_read_inode2(inode, md);
 141                         if (S_ISREG(inode->i_mode) &&
 142                             ll_i2info(inode)->lli_clob == NULL) {
 143                                 CDEBUG(D_INODE,
 144                                         "%s: apply lsm %p to inode "DFID".\n",
 145                                         ll_get_fsname(sb, NULL, 0), md->lsm,
 146                                         PFID(ll_inode2fid(inode)));
 147                                 rc = cl_file_inode_init(inode, md);
 148                         }
 149                         if (rc != 0) {
 150                                 make_bad_inode(inode);
 151                                 unlock_new_inode(inode);
 152                                 iput(inode);
 153                                 inode = ERR_PTR(rc);
 154                         } else
 155                                 unlock_new_inode(inode);
 156                 } else if (!(inode->i_state & (I_FREEING | I_CLEAR)))
 157                         ll_update_inode(inode, md);
 158                 CDEBUG(D_VFSTRACE, "got inode: %p for "DFID"\n",
 159                        inode, PFID(&md->body->fid1));
 160         }
 161         return inode;
 162 }
 163
 164 static void ll_invalidate_negative_children(struct inode *dir)
 165 {
 166         struct dentry *dentry, *tmp_subdir;
 167         struct ll_d_hlist_node *p;
 168
 169         ll_lock_dcache(dir);
 170         ll_d_hlist_for_each_entry(dentry, p, &dir->i_dentry, d_alias) {
 171                 spin_lock(&dentry->d_lock);
 172                 if (!list_empty(&dentry->d_subdirs)) {
 173                         struct dentry *child;
 174
 175                         list_for_each_entry_safe(child, tmp_subdir,
 176                                                  &dentry->d_subdirs,
 177                                                  d_u.d_child) {
 178                                 if (child->d_inode == NULL)
 179                                         d_lustre_invalidate(child, 1);
 180                         }
 181                 }
 182                 spin_unlock(&dentry->d_lock);
 183         }
 184         ll_unlock_dcache(dir);
 185 }
 186
 187 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 188                        void *data, int flag)
 189 {
 190         struct lustre_handle lockh;
 191         int rc;
 192
 193         switch (flag) {
 194         case LDLM_CB_BLOCKING:
 195                 ldlm_lock2handle(lock, &lockh);
 196                 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
 197                 if (rc < 0) {
 198                         CDEBUG(D_INODE, "ldlm_cli_cancel: rc = %d\n", rc);
 199                         return rc;
 200                 }
 201                 break;
 202         case LDLM_CB_CANCELING: {
 203                 struct inode *inode = ll_inode_from_resource_lock(lock);
 204                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
 205
 206                 /* Inode is set to lock->l_resource->lr_lvb_inode
 207                  * for mdc - bug 24555 */
 208                 LASSERT(lock->l_ast_data == NULL);
 209
 210                 if (inode == NULL)
 211                         break;
 212
 213                 /* Invalidate all dentries associated with this inode */
 214                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
 215
 216                 if (!fid_res_name_eq(ll_inode2fid(inode),
 217                                      &lock->l_resource->lr_name)) {
 218                         LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
 219                                    PFID(ll_inode2fid(inode)), inode);
 220                         LBUG();
 221                 }
 222
 223                 if (bits & MDS_INODELOCK_XATTR) {
 224                         ll_xattr_cache_destroy(inode);
 225                         bits &= ~MDS_INODELOCK_XATTR;
 226                 }
 227
 228                 /* For OPEN locks we differentiate between lock modes
 229                  * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
 230                 if (bits & MDS_INODELOCK_OPEN)
 231                         ll_have_md_lock(inode, &bits, lock->l_req_mode);
 232
 233                 if (bits & MDS_INODELOCK_OPEN) {
 234                         fmode_t fmode;
 235
 236                         switch (lock->l_req_mode) {
 237                         case LCK_CW:
 238                                 fmode = FMODE_WRITE;
 239                                 break;
 240                         case LCK_PR:
 241                                 fmode = FMODE_EXEC;
 242                                 break;
 243                         case LCK_CR:
 244                                 fmode = FMODE_READ;
 245                                 break;
 246                         default:
 247                                 LDLM_ERROR(lock, "bad lock mode for OPEN lock");
 248                                 LBUG();
 249                         }
 250
 251                         ll_md_real_close(inode, fmode);
 252                 }
 253
 254                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
 255                             MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM))
 256                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
 257
 258                 if (bits & MDS_INODELOCK_LAYOUT) {
 259                         struct cl_object_conf conf = {
 260                                 .coc_opc = OBJECT_CONF_INVALIDATE,
 261                                 .coc_inode = inode,
 262                         };
 263
 264                         rc = ll_layout_conf(inode, &conf);
 265                         if (rc < 0)
 266                                 CDEBUG(D_INODE, "cannot invalidate layout of "
 267                                        DFID": rc = %d\n",
 268                                        PFID(ll_inode2fid(inode)), rc);
 269                 }
 270
 271                 if (bits & MDS_INODELOCK_UPDATE) {
 272                         struct ll_inode_info *lli = ll_i2info(inode);
 273
 274                         spin_lock(&lli->lli_lock);
 275                         lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
 276                         spin_unlock(&lli->lli_lock);
 277                 }
 278
 279                 if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
 280                         CDEBUG(D_INODE, "invalidating inode %lu\n",
 281                                inode->i_ino);
 282                         truncate_inode_pages(inode->i_mapping, 0);
 283                         ll_invalidate_negative_children(inode);
 284                 }
 285
 286                 if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
 287                     inode->i_sb->s_root != NULL &&
 288                     inode != inode->i_sb->s_root->d_inode)
 289                         ll_invalidate_aliases(inode);
 290
 291                 iput(inode);
 292                 break;
 293         }
 294         default:
 295                 LBUG();
 296         }
 297
 298         return 0;
 299 }
 300
 301 __u32 ll_i2suppgid(struct inode *i)
 302 {
 303         if (in_group_p(i->i_gid))
 304                 return (__u32)from_kgid(&init_user_ns, i->i_gid);
 305         else
 306                 return (__u32)(-1);
 307 }
 308
 309 /* Pack the required supplementary groups into the supplied groups array.
 310  * If we don't need to use the groups from the target inode(s) then we
 311  * instead pack one or more groups from the user's supplementary group
 312  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 313 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 314 {
 315 #if 0
 316         int i;
 317 #endif
 318
 319         LASSERT(i1 != NULL);
 320         LASSERT(suppgids != NULL);
 321
 322         suppgids[0] = ll_i2suppgid(i1);
 323
 324         if (i2)
 325                 suppgids[1] = ll_i2suppgid(i2);
 326                 else
 327                         suppgids[1] = -1;
 328
 329 #if 0
 330         for (i = 0; i < current_ngroups; i++) {
 331                 if (suppgids[0] == -1) {
 332                         if (current_groups[i] != suppgids[1])
 333                                 suppgids[0] = current_groups[i];
 334                         continue;
 335                 }
 336                 if (suppgids[1] == -1) {
 337                         if (current_groups[i] != suppgids[0])
 338                                 suppgids[1] = current_groups[i];
 339                         continue;
 340                 }
 341                 break;
 342         }
 343 #endif
 344 }
 345
 346 /*
 347  * try to reuse three types of dentry:
 348  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
 349  *    by concurrent .revalidate).
 350  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
 351  *    be cleared by others calling d_lustre_revalidate).
 352  * 3. DISCONNECTED alias.
 353  */
 354 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
 355 {
 356         struct dentry *alias, *discon_alias, *invalid_alias;
 357         struct ll_d_hlist_node *p;
 358
 359         if (ll_d_hlist_empty(&inode->i_dentry))
 360                 return NULL;
 361
 362         discon_alias = invalid_alias = NULL;
 363
 364         ll_lock_dcache(inode);
 365         ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
 366                 LASSERT(alias != dentry);
 367
 368                 spin_lock(&alias->d_lock);
 369                 if (alias->d_flags & DCACHE_DISCONNECTED)
 370                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
 371                         discon_alias = alias;
 372                 else if (alias->d_parent == dentry->d_parent         &&
 373                          alias->d_name.hash == dentry->d_name.hash       &&
 374                          alias->d_name.len == dentry->d_name.len         &&
 375                          memcmp(alias->d_name.name, dentry->d_name.name,
 376                                 dentry->d_name.len) == 0)
 377                         invalid_alias = alias;
 378                 spin_unlock(&alias->d_lock);
 379
 380                 if (invalid_alias)
 381                         break;
 382         }
 383         alias = invalid_alias ?: discon_alias ?: NULL;
 384         if (alias) {
 385                 spin_lock(&alias->d_lock);
 386                 dget_dlock(alias);
 387                 spin_unlock(&alias->d_lock);
 388         }
 389         ll_unlock_dcache(inode);
 390
 391         return alias;
 392 }
 393
 394 /*
 395  * Similar to d_splice_alias(), but lustre treats invalid alias
 396  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
 397  */
 398 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
 399 {
 400         struct dentry *new;
 401         int rc;
 402
 403         if (inode) {
 404                 new = ll_find_alias(inode, de);
 405                 if (new) {
 406                         rc = ll_d_init(new);
 407                         if (rc < 0) {
 408                                 dput(new);
 409                                 return ERR_PTR(rc);
 410                         }
 411                         d_move(new, de);
 412                         iput(inode);
 413                         CDEBUG(D_DENTRY,
 414                                "Reuse dentry %p inode %p refc %d flags %#x\n",
 415                               new, new->d_inode, d_count(new), new->d_flags);
 416                         return new;
 417                 }
 418         }
 419         rc = ll_d_init(de);
 420         if (rc < 0)
 421                 return ERR_PTR(rc);
 422         d_add(de, inode);
 423         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
 424                de, de->d_inode, d_count(de), de->d_flags);
 425         return de;
 426 }
 427
 428 static int ll_lookup_it_finish(struct ptlrpc_request *request,
 429                                struct lookup_intent *it,
 430                                struct inode *parent, struct dentry **de)
 431 {
 432         struct inode *inode = NULL;
 433         __u64 bits = 0;
 434         int rc;
 435
 436         /* NB 1 request reference will be taken away by ll_intent_lock()
 437          * when I return */
 438         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
 439                it->d.lustre.it_disposition);
 440         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 441                 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
 442                 if (rc)
 443                         return rc;
 444
 445                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
 446
 447                 /* We used to query real size from OSTs here, but actually
 448                    this is not needed. For stat() calls size would be updated
 449                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
 450                    2.4 and
 451                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
 452                    Everybody else who needs correct file size would call
 453                    ll_glimpse_size or some equivalent themselves anyway.
 454                    Also see bug 7198. */
 455         }
 456
 457         /* Only hash *de if it is unhashed (new dentry).
 458          * Atoimc_open may passing hashed dentries for open.
 459          */
 460         if (d_unhashed(*de)) {
 461                 struct dentry *alias;
 462
 463                 alias = ll_splice_alias(inode, *de);
 464                 if (IS_ERR(alias))
 465                         return PTR_ERR(alias);
 466                 *de = alias;
 467         } else if (!it_disposition(it, DISP_LOOKUP_NEG)  &&
 468                    !it_disposition(it, DISP_OPEN_CREATE)) {
 469                 /* With DISP_OPEN_CREATE dentry will
 470                    instantiated in ll_create_it. */
 471                 LASSERT((*de)->d_inode == NULL);
 472                 d_instantiate(*de, inode);
 473         }
 474
 475         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
 476                 /* we have lookup look - unhide dentry */
 477                 if (bits & MDS_INODELOCK_LOOKUP)
 478                         d_lustre_revalidate(*de);
 479         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
 480                 /* If file created on server, don't depend on parent UPDATE
 481                  * lock to unhide it. It is left hidden and next lookup can
 482                  * find it in ll_splice_alias.
 483                  */
 484                 /* Check that parent has UPDATE lock. */
 485                 struct lookup_intent parent_it = {
 486                                         .it_op = IT_GETATTR,
 487                                         .d.lustre.it_lock_handle = 0 };
 488
 489                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it,
 490                                        &ll_i2info(parent)->lli_fid, NULL)) {
 491                         d_lustre_revalidate(*de);
 492                         ll_intent_release(&parent_it);
 493                 }
 494         }
 495
 496         return 0;
 497 }
 498
 499 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 500                                    struct lookup_intent *it, int lookup_flags)
 501 {
 502         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
 503         struct dentry *save = dentry, *retval;
 504         struct ptlrpc_request *req = NULL;
 505         struct md_op_data *op_data;
 506         __u32 opc;
 507         int rc;
 508
 509         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
 510                 return ERR_PTR(-ENAMETOOLONG);
 511
 512         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 513                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 514                parent->i_generation, parent, LL_IT2STR(it));
 515
 516         if (d_mountpoint(dentry))
 517                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 518
 519         if (it == NULL || it->it_op == IT_GETXATTR)
 520                 it = &lookup_it;
 521
 522         if (it->it_op == IT_GETATTR) {
 523                 rc = ll_statahead_enter(parent, &dentry, 0);
 524                 if (rc == 1) {
 525                         if (dentry == save)
 526                                 retval = NULL;
 527                         else
 528                                 retval = dentry;
 529                         goto out;
 530                 }
 531         }
 532
 533         if (it->it_op & IT_CREAT)
 534                 opc = LUSTRE_OPC_CREATE;
 535         else
 536                 opc = LUSTRE_OPC_ANY;
 537
 538         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
 539                                      dentry->d_name.len, lookup_flags, opc,
 540                                      NULL);
 541         if (IS_ERR(op_data))
 542                 return (void *)op_data;
 543
 544         /* enforce umask if acl disabled or MDS doesn't support umask */
 545         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 546                 it->it_create_mode &= ~current_umask();
 547
 548         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
 549                             lookup_flags, &req, ll_md_blocking_ast, 0);
 550         ll_finish_md_op_data(op_data);
 551         if (rc < 0) {
 552                 retval = ERR_PTR(rc);
 553                 goto out;
 554         }
 555
 556         rc = ll_lookup_it_finish(req, it, parent, &dentry);
 557         if (rc != 0) {
 558                 ll_intent_release(it);
 559                 retval = ERR_PTR(rc);
 560                 goto out;
 561         }
 562
 563         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
 564             !S_ISREG(dentry->d_inode->i_mode) &&
 565             !S_ISDIR(dentry->d_inode->i_mode)) {
 566                 ll_release_openhandle(dentry, it);
 567         }
 568         ll_lookup_finish_locks(it, dentry);
 569
 570         if (dentry == save)
 571                 retval = NULL;
 572         else
 573                 retval = dentry;
 574         goto out;
 575  out:
 576         if (req)
 577                 ptlrpc_req_finished(req);
 578         if (it->it_op == IT_GETATTR && (retval == NULL || retval == dentry))
 579                 ll_statahead_mark(parent, dentry);
 580         return retval;
 581 }
 582
 583 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 584                                    unsigned int flags)
 585 {
 586         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
 587         struct dentry *de;
 588
 589         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),flags=%u\n",
 590                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
 591                parent->i_generation, parent, flags);
 592
 593         /* Optimize away (CREATE && !OPEN). Let .create handle the race. */
 594         if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN))
 595                 return NULL;
 596
 597         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
 598                 itp = NULL;
 599         else
 600                 itp = &it;
 601         de = ll_lookup_it(parent, dentry, itp, 0);
 602
 603         if (itp != NULL)
 604                 ll_intent_release(itp);
 605
 606         return de;
 607 }
 608
 609 /*
 610  * For cached negative dentry and new dentry, handle lookup/create/open
 611  * together.
 612  */
 613 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
 614                           struct file *file, unsigned open_flags,
 615                           umode_t mode, int *opened)
 616 {
 617         struct lookup_intent *it;
 618         struct dentry *de;
 619         long long lookup_flags = LOOKUP_OPEN;
 620         int rc = 0;
 621
 622         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),file %p,"
 623                            "open_flags %x,mode %x opened %d\n",
 624                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 625                dir->i_generation, dir, file, open_flags, mode, *opened);
 626
 627         it = kzalloc(sizeof(*it), GFP_NOFS);
 628         if (!it)
 629                 return -ENOMEM;
 630
 631         it->it_op = IT_OPEN;
 632         if (open_flags & O_CREAT) {
 633                 it->it_op |= IT_CREAT;
 634                 lookup_flags |= LOOKUP_CREATE;
 635         }
 636         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
 637         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
 638
 639         /* Dentry added to dcache tree in ll_lookup_it */
 640         de = ll_lookup_it(dir, dentry, it, lookup_flags);
 641         if (IS_ERR(de))
 642                 rc = PTR_ERR(de);
 643         else if (de != NULL)
 644                 dentry = de;
 645
 646         if (!rc) {
 647                 if (it_disposition(it, DISP_OPEN_CREATE)) {
 648                         /* Dentry instantiated in ll_create_it. */
 649                         rc = ll_create_it(dir, dentry, mode, it);
 650                         if (rc) {
 651                                 /* We dget in ll_splice_alias. */
 652                                 if (de != NULL)
 653                                         dput(de);
 654                                 goto out_release;
 655                         }
 656
 657                         *opened |= FILE_CREATED;
 658                 }
 659                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
 660                         /* Open dentry. */
 661                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
 662                                 /* We cannot call open here as it would
 663                                  * deadlock.
 664                                  */
 665                                 if (it_disposition(it, DISP_ENQ_OPEN_REF))
 666                                         ptlrpc_req_finished(
 667                                                        (struct ptlrpc_request *)
 668                                                           it->d.lustre.it_data);
 669                                 rc = finish_no_open(file, de);
 670                         } else {
 671                                 file->private_data = it;
 672                                 rc = finish_open(file, dentry, NULL, opened);
 673                                 /* We dget in ll_splice_alias. finish_open takes
 674                                  * care of dget for fd open.
 675                                  */
 676                                 if (de != NULL)
 677                                         dput(de);
 678                         }
 679                 } else {
 680                         rc = finish_no_open(file, de);
 681                 }
 682         }
 683
 684 out_release:
 685         ll_intent_release(it);
 686         OBD_FREE(it, sizeof(*it));
 687
 688         return rc;
 689 }
 690
 691
 692 /* We depend on "mode" being set with the proper file type/umask by now */
 693 static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
 694 {
 695         struct inode *inode = NULL;
 696         struct ptlrpc_request *request = NULL;
 697         struct ll_sb_info *sbi = ll_i2sbi(dir);
 698         int rc;
 699
 700         LASSERT(it && it->d.lustre.it_disposition);
 701
 702         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
 703         request = it->d.lustre.it_data;
 704         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
 705         rc = ll_prep_inode(&inode, request, dir->i_sb, it);
 706         if (rc) {
 707                 inode = ERR_PTR(rc);
 708                 goto out;
 709         }
 710
 711         LASSERT(ll_d_hlist_empty(&inode->i_dentry));
 712
 713         /* We asked for a lock on the directory, but were granted a
 714          * lock on the inode.  Since we finally have an inode pointer,
 715          * stuff it in the lock. */
 716         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
 717                inode, inode->i_ino, inode->i_generation);
 718         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
 719  out:
 720         ptlrpc_req_finished(request);
 721         return inode;
 722 }
 723
 724 /*
 725  * By the time this is called, we already have created the directory cache
 726  * entry for the new file, but it is so far negative - it has no inode.
 727  *
 728  * We defer creating the OBD object(s) until open, to keep the intent and
 729  * non-intent code paths similar, and also because we do not have the MDS
 730  * inode number before calling ll_create_node() (which is needed for LOV),
 731  * so we would need to do yet another RPC to the MDS to store the LOV EA
 732  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
 733  * lmm_size in datalen (the MDS still has code which will handle that).
 734  *
 735  * If the create succeeds, we fill in the inode information
 736  * with d_instantiate().
 737  */
 738 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
 739                         struct lookup_intent *it)
 740 {
 741         struct inode *inode;
 742         int rc = 0;
 743
 744         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
 745                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 746                dir->i_generation, dir, LL_IT2STR(it));
 747
 748         rc = it_open_error(DISP_OPEN_CREATE, it);
 749         if (rc)
 750                 return rc;
 751
 752         inode = ll_create_node(dir, it);
 753         if (IS_ERR(inode))
 754                 return PTR_ERR(inode);
 755
 756         d_instantiate(dentry, inode);
 757         return 0;
 758 }
 759
 760 static void ll_update_times(struct ptlrpc_request *request,
 761                             struct inode *inode)
 762 {
 763         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
 764                                                        &RMF_MDT_BODY);
 765
 766         LASSERT(body);
 767         if (body->valid & OBD_MD_FLMTIME &&
 768             body->mtime > LTIME_S(inode->i_mtime)) {
 769                 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to %llu\n",
 770                        inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
 771                 LTIME_S(inode->i_mtime) = body->mtime;
 772         }
 773         if (body->valid & OBD_MD_FLCTIME &&
 774             body->ctime > LTIME_S(inode->i_ctime))
 775                 LTIME_S(inode->i_ctime) = body->ctime;
 776 }
 777
 778 static int ll_new_node(struct inode *dir, struct qstr *name,
 779                        const char *tgt, int mode, int rdev,
 780                        struct dentry *dchild, __u32 opc)
 781 {
 782         struct ptlrpc_request *request = NULL;
 783         struct md_op_data *op_data;
 784         struct inode *inode = NULL;
 785         struct ll_sb_info *sbi = ll_i2sbi(dir);
 786         int tgt_len = 0;
 787         int err;
 788
 789         if (unlikely(tgt != NULL))
 790                 tgt_len = strlen(tgt) + 1;
 791
 792         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
 793                                      name->len, 0, opc, NULL);
 794         if (IS_ERR(op_data)) {
 795                 err = PTR_ERR(op_data);
 796                 goto err_exit;
 797         }
 798
 799         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
 800                         from_kuid(&init_user_ns, current_fsuid()),
 801                         from_kgid(&init_user_ns, current_fsgid()),
 802                         cfs_curproc_cap_pack(), rdev, &request);
 803         ll_finish_md_op_data(op_data);
 804         if (err)
 805                 goto err_exit;
 806
 807         ll_update_times(request, dir);
 808
 809         if (dchild) {
 810                 err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
 811                 if (err)
 812                         goto err_exit;
 813
 814                 d_instantiate(dchild, inode);
 815         }
 816 err_exit:
 817         ptlrpc_req_finished(request);
 818
 819         return err;
 820 }
 821
 822 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
 823                             unsigned rdev, struct dentry *dchild)
 824 {
 825         int err;
 826
 827         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
 828                name->len, name->name, dir->i_ino, dir->i_generation, dir,
 829                mode, rdev);
 830
 831         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
 832                 mode &= ~current_umask();
 833
 834         switch (mode & S_IFMT) {
 835         case 0:
 836                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
 837         case S_IFREG:
 838         case S_IFCHR:
 839         case S_IFBLK:
 840         case S_IFIFO:
 841         case S_IFSOCK:
 842                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
 843                                   LUSTRE_OPC_MKNOD);
 844                 break;
 845         case S_IFDIR:
 846                 err = -EPERM;
 847                 break;
 848         default:
 849                 err = -EINVAL;
 850         }
 851
 852         if (!err)
 853                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
 854
 855         return err;
 856 }
 857
 858 /*
 859  * Plain create. Intent create is handled in atomic_open.
 860  */
 861 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
 862                         umode_t mode, bool want_excl)
 863 {
 864         int rc;
 865
 866         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),"
 867                            "flags=%u, excl=%d\n",
 868                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
 869                dir->i_generation, dir, mode, want_excl);
 870
 871         rc = ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
 872
 873         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
 874
 875         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
 876                dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
 877
 878         return rc;
 879 }
 880
 881 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
 882                               const char *tgt, struct dentry *dchild)
 883 {
 884         int err;
 885
 886         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
 887                name->len, name->name, dir->i_ino, dir->i_generation,
 888                dir, 3000, tgt);
 889
 890         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
 891                           0, dchild, LUSTRE_OPC_SYMLINK);
 892
 893         if (!err)
 894                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
 895
 896         return err;
 897 }
 898
 899 static int ll_link_generic(struct inode *src,  struct inode *dir,
 900                            struct qstr *name, struct dentry *dchild)
 901 {
 902         struct ll_sb_info *sbi = ll_i2sbi(dir);
 903         struct ptlrpc_request *request = NULL;
 904         struct md_op_data *op_data;
 905         int err;
 906
 907         CDEBUG(D_VFSTRACE,
 908                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
 909                src->i_ino, src->i_generation, src, dir->i_ino,
 910                dir->i_generation, dir, name->len, name->name);
 911
 912         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
 913                                      0, LUSTRE_OPC_ANY, NULL);
 914         if (IS_ERR(op_data))
 915                 return PTR_ERR(op_data);
 916
 917         err = md_link(sbi->ll_md_exp, op_data, &request);
 918         ll_finish_md_op_data(op_data);
 919         if (err)
 920                 goto out;
 921
 922         ll_update_times(request, dir);
 923         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
 924 out:
 925         ptlrpc_req_finished(request);
 926         return err;
 927 }
 928
 929 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
 930                             int mode, struct dentry *dchild)
 931
 932 {
 933         int err;
 934
 935         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 936                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 937
 938         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
 939                 mode &= ~current_umask();
 940         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
 941         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
 942
 943         if (!err)
 944                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
 945
 946         return err;
 947 }
 948
 949 /* Try to find the child dentry by its name.
 950    If found, put the result fid into @fid. */
 951 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
 952                              struct lu_fid *fid)
 953 {
 954         struct dentry *parent, *child;
 955
 956         parent = ll_d_hlist_entry(dir->i_dentry, struct dentry, d_alias);
 957         child = d_lookup(parent, name);
 958         if (child) {
 959                 if (child->d_inode)
 960                         *fid = *ll_inode2fid(child->d_inode);
 961                 dput(child);
 962         }
 963 }
 964
 965 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
 966                             struct dentry *dchild, struct qstr *name)
 967 {
 968         struct ptlrpc_request *request = NULL;
 969         struct md_op_data *op_data;
 970         int rc;
 971
 972         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
 973                name->len, name->name, dir->i_ino, dir->i_generation, dir);
 974
 975         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
 976                 return -EBUSY;
 977
 978         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
 979                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
 980         if (IS_ERR(op_data))
 981                 return PTR_ERR(op_data);
 982
 983         ll_get_child_fid(dir, name, &op_data->op_fid3);
 984         op_data->op_fid2 = op_data->op_fid3;
 985         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
 986         ll_finish_md_op_data(op_data);
 987         if (rc == 0) {
 988                 ll_update_times(request, dir);
 989                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
 990         }
 991
 992         ptlrpc_req_finished(request);
 993         return rc;
 994 }
 995
 996 /**
 997  * Remove dir entry
 998  **/
 999 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1000 {
1001         struct ptlrpc_request *request = NULL;
1002         struct md_op_data *op_data;
1003         int rc;
1004
1005         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1006                namelen, name, dir->i_ino, dir->i_generation, dir);
1007
1008         op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1009                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1010         if (IS_ERR(op_data))
1011                 return PTR_ERR(op_data);
1012         op_data->op_cli_flags |= CLI_RM_ENTRY;
1013         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1014         ll_finish_md_op_data(op_data);
1015         if (rc == 0) {
1016                 ll_update_times(request, dir);
1017                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1018         }
1019
1020         ptlrpc_req_finished(request);
1021         return rc;
1022 }
1023
1024 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1025 {
1026         struct mdt_body *body;
1027         struct lov_mds_md *eadata;
1028         struct lov_stripe_md *lsm = NULL;
1029         struct obd_trans_info oti = { 0 };
1030         struct obdo *oa;
1031         struct obd_capa *oc = NULL;
1032         int rc;
1033
1034         /* req is swabbed so this is safe */
1035         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1036         if (!(body->valid & OBD_MD_FLEASIZE))
1037                 return 0;
1038
1039         if (body->eadatasize == 0) {
1040                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1041                 rc = -EPROTO;
1042                 goto out;
1043         }
1044
1045         /* The MDS sent back the EA because we unlinked the last reference
1046          * to this file. Use this EA to unlink the objects on the OST.
1047          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1048          * check it is complete and sensible. */
1049         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1050                                               body->eadatasize);
1051         LASSERT(eadata != NULL);
1052
1053         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1054         if (rc < 0) {
1055                 CERROR("obd_unpackmd: %d\n", rc);
1056                 goto out;
1057         }
1058         LASSERT(rc >= sizeof(*lsm));
1059
1060         OBDO_ALLOC(oa);
1061         if (oa == NULL) {
1062                 rc = -ENOMEM;
1063                 goto out_free_memmd;
1064         }
1065
1066         oa->o_oi = lsm->lsm_oi;
1067         oa->o_mode = body->mode & S_IFMT;
1068         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1069
1070         if (body->valid & OBD_MD_FLCOOKIE) {
1071                 oa->o_valid |= OBD_MD_FLCOOKIE;
1072                 oti.oti_logcookies =
1073                         req_capsule_server_sized_get(&request->rq_pill,
1074                                                      &RMF_LOGCOOKIES,
1075                                                    sizeof(struct llog_cookie) *
1076                                                      lsm->lsm_stripe_count);
1077                 if (oti.oti_logcookies == NULL) {
1078                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1079                         body->valid &= ~OBD_MD_FLCOOKIE;
1080                 }
1081         }
1082
1083         if (body->valid & OBD_MD_FLOSSCAPA) {
1084                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1085                 if (rc)
1086                         goto out_free_memmd;
1087         }
1088
1089         rc = obd_destroy(NULL, ll_i2dtexp(dir), oa, lsm, &oti,
1090                          ll_i2mdexp(dir), oc);
1091         capa_put(oc);
1092         if (rc)
1093                 CERROR("obd destroy objid "DOSTID" error %d\n",
1094                        POSTID(&lsm->lsm_oi), rc);
1095 out_free_memmd:
1096         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1097         OBDO_FREE(oa);
1098 out:
1099         return rc;
1100 }
1101
1102 /* ll_unlink_generic() doesn't update the inode with the new link count.
1103  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
1104  * is any lock existing. They will recycle dentries and inodes based upon locks
1105  * too. b=20433 */
1106 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1107                              struct dentry *dchild, struct qstr *name)
1108 {
1109         struct ptlrpc_request *request = NULL;
1110         struct md_op_data *op_data;
1111         int rc;
1112         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1113                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1114
1115         /*
1116          * XXX: unlink bind mountpoint maybe call to here,
1117          * just check it as vfs_unlink does.
1118          */
1119         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1120                 return -EBUSY;
1121
1122         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1123                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1124         if (IS_ERR(op_data))
1125                 return PTR_ERR(op_data);
1126
1127         ll_get_child_fid(dir, name, &op_data->op_fid3);
1128         op_data->op_fid2 = op_data->op_fid3;
1129         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1130         ll_finish_md_op_data(op_data);
1131         if (rc)
1132                 goto out;
1133
1134         ll_update_times(request, dir);
1135         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1136
1137         rc = ll_objects_destroy(request, dir);
1138  out:
1139         ptlrpc_req_finished(request);
1140         return rc;
1141 }
1142
1143 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1144                              struct dentry *src_dchild, struct qstr *src_name,
1145                              struct inode *tgt, struct dentry *tgt_dparent,
1146                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1147 {
1148         struct ptlrpc_request *request = NULL;
1149         struct ll_sb_info *sbi = ll_i2sbi(src);
1150         struct md_op_data *op_data;
1151         int err;
1152
1153         CDEBUG(D_VFSTRACE,
1154                "VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1155                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1156                src->i_ino, src->i_generation, src, tgt_name->len,
1157                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1158
1159         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1160             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1161                 return -EBUSY;
1162
1163         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1164                                      LUSTRE_OPC_ANY, NULL);
1165         if (IS_ERR(op_data))
1166                 return PTR_ERR(op_data);
1167
1168         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1169         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1170         err = md_rename(sbi->ll_md_exp, op_data,
1171                         src_name->name, src_name->len,
1172                         tgt_name->name, tgt_name->len, &request);
1173         ll_finish_md_op_data(op_data);
1174         if (!err) {
1175                 ll_update_times(request, src);
1176                 ll_update_times(request, tgt);
1177                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1178                 err = ll_objects_destroy(request, src);
1179         }
1180
1181         ptlrpc_req_finished(request);
1182
1183         return err;
1184 }
1185
1186 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1187                     dev_t rdev)
1188 {
1189         return ll_mknod_generic(dir, &dchild->d_name, mode,
1190                                 old_encode_dev(rdev), dchild);
1191 }
1192
1193 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1194 {
1195         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1196 }
1197
1198 static int ll_mkdir(struct inode *dir, struct dentry *dentry, ll_umode_t mode)
1199 {
1200         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1201 }
1202
1203 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1204 {
1205         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1206 }
1207
1208 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1209                       const char *oldname)
1210 {
1211         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1212 }
1213
1214 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1215                    struct dentry *new_dentry)
1216 {
1217         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1218                                new_dentry);
1219 }
1220
1221 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1222                      struct inode *new_dir, struct dentry *new_dentry)
1223 {
1224         int err;
1225         err = ll_rename_generic(old_dir, NULL,
1226                                  old_dentry, &old_dentry->d_name,
1227                                  new_dir, NULL, new_dentry,
1228                                  &new_dentry->d_name);
1229         if (!err) {
1230                         d_move(old_dentry, new_dentry);
1231         }
1232         return err;
1233 }
1234
1235 const struct inode_operations ll_dir_inode_operations = {
1236         .mknod        = ll_mknod,
1237         .atomic_open        = ll_atomic_open,
1238         .lookup      = ll_lookup_nd,
1239         .create      = ll_create_nd,
1240         /* We need all these non-raw things for NFSD, to not patch it. */
1241         .unlink      = ll_unlink,
1242         .mkdir        = ll_mkdir,
1243         .rmdir        = ll_rmdir,
1244         .symlink            = ll_symlink,
1245         .link          = ll_link,
1246         .rename      = ll_rename,
1247         .setattr            = ll_setattr,
1248         .getattr            = ll_getattr,
1249         .permission      = ll_inode_permission,
1250         .setxattr          = ll_setxattr,
1251         .getxattr          = ll_getxattr,
1252         .listxattr        = ll_listxattr,
1253         .removexattr    = ll_removexattr,
1254         .get_acl            = ll_get_acl,
1255 };
1256
1257 const struct inode_operations ll_special_inode_operations = {
1258         .setattr        = ll_setattr,
1259         .getattr        = ll_getattr,
1260         .permission     = ll_inode_permission,
1261         .setxattr       = ll_setxattr,
1262         .getxattr       = ll_getxattr,
1263         .listxattr      = ll_listxattr,
1264         .removexattr    = ll_removexattr,
1265         .get_acl            = ll_get_acl,
1266 };