fs/ocfs2/namei.c

   1 /* -*- mode: c; c-basic-offset: 8; -*-
   2  * vim: noexpandtab sw=8 ts=8 sts=0:
   3  *
   4  * namei.c
   5  *
   6  * Create and rename file, directory, symlinks
   7  *
   8  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
   9  *
  10  *  Portions of this code from linux/fs/ext3/dir.c
  11  *
  12  *  Copyright (C) 1992, 1993, 1994, 1995
  13  *  Remy Card ([email protected])
  14  *  Laboratoire MASI - Institut Blaise pascal
  15  *  Universite Pierre et Marie Curie (Paris VI)
  16  *
  17  *   from
  18  *
  19  *   linux/fs/minix/dir.c
  20  *
  21  *   Copyright (C) 1991, 1992 Linux Torvalds
  22  *
  23  * This program is free software; you can redistribute it and/or
  24  * modify it under the terms of the GNU General Public
  25  * License as published by the Free Software Foundation; either
  26  * version 2 of the License, or (at your option) any later version.
  27  *
  28  * This program is distributed in the hope that it will be useful,
  29  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  30  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  31  * General Public License for more details.
  32  *
  33  * You should have received a copy of the GNU General Public
  34  * License along with this program; if not, write to the
  35  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  36  * Boston, MA 021110-1307, USA.
  37  */
  38
  39 #include <linux/fs.h>
  40 #include <linux/types.h>
  41 #include <linux/slab.h>
  42 #include <linux/highmem.h>
  43 #include <linux/quotaops.h>
  44
  45 #include <cluster/masklog.h>
  46
  47 #include "ocfs2.h"
  48
  49 #include "alloc.h"
  50 #include "dcache.h"
  51 #include "dir.h"
  52 #include "dlmglue.h"
  53 #include "extent_map.h"
  54 #include "file.h"
  55 #include "inode.h"
  56 #include "journal.h"
  57 #include "namei.h"
  58 #include "suballoc.h"
  59 #include "super.h"
  60 #include "symlink.h"
  61 #include "sysfile.h"
  62 #include "uptodate.h"
  63 #include "xattr.h"
  64 #include "acl.h"
  65 #include "ocfs2_trace.h"
  66
  67 #include "buffer_head_io.h"
  68
  69 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
  70                               struct inode *dir,
  71                               struct inode *inode,
  72                               dev_t dev,
  73                               struct buffer_head **new_fe_bh,
  74                               struct buffer_head *parent_fe_bh,
  75                               handle_t *handle,
  76                               struct ocfs2_alloc_context *inode_ac);
  77
  78 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
  79                                     struct inode **ret_orphan_dir,
  80                                     u64 blkno,
  81                                     char *name,
  82                                     struct ocfs2_dir_lookup_result *lookup);
  83
  84 static int ocfs2_orphan_add(struct ocfs2_super *osb,
  85                             handle_t *handle,
  86                             struct inode *inode,
  87                             struct buffer_head *fe_bh,
  88                             char *name,
  89                             struct ocfs2_dir_lookup_result *lookup,
  90                             struct inode *orphan_dir_inode);
  91
  92 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
  93                                      handle_t *handle,
  94                                      struct inode *inode,
  95                                      const char *symname);
  96
  97 static int ocfs2_double_lock(struct ocfs2_super *osb,
  98                              struct buffer_head **bh1,
  99                              struct inode *inode1,
 100                              struct buffer_head **bh2,
 101                              struct inode *inode2,
 102                              int rename);
 103
 104 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
 105 /* An orphan dir name is an 8 byte value, printed as a hex string */
 106 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
 107
 108 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
 109                                    unsigned int flags)
 110 {
 111         int status;
 112         u64 blkno;
 113         struct inode *inode = NULL;
 114         struct dentry *ret;
 115         struct ocfs2_inode_info *oi;
 116
 117         trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
 118                            dentry->d_name.name,
 119                            (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
 120
 121         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
 122                 ret = ERR_PTR(-ENAMETOOLONG);
 123                 goto bail;
 124         }
 125
 126         status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
 127         if (status < 0) {
 128                 if (status != -ENOENT)
 129                         mlog_errno(status);
 130                 ret = ERR_PTR(status);
 131                 goto bail;
 132         }
 133
 134         status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
 135                                             dentry->d_name.len, &blkno);
 136         if (status < 0)
 137                 goto bail_add;
 138
 139         inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
 140         if (IS_ERR(inode)) {
 141                 ret = ERR_PTR(-EACCES);
 142                 goto bail_unlock;
 143         }
 144
 145         oi = OCFS2_I(inode);
 146         /* Clear any orphaned state... If we were able to look up the
 147          * inode from a directory, it certainly can't be orphaned. We
 148          * might have the bad state from a node which intended to
 149          * orphan this inode but crashed before it could commit the
 150          * unlink. */
 151         spin_lock(&oi->ip_lock);
 152         oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
 153         spin_unlock(&oi->ip_lock);
 154
 155 bail_add:
 156         ret = d_splice_alias(inode, dentry);
 157
 158         if (inode) {
 159                 /*
 160                  * If d_splice_alias() finds a DCACHE_DISCONNECTED
 161                  * dentry, it will d_move() it on top of ourse. The
 162                  * return value will indicate this however, so in
 163                  * those cases, we switch them around for the locking
 164                  * code.
 165                  *
 166                  * NOTE: This dentry already has ->d_op set from
 167                  * ocfs2_get_parent() and ocfs2_get_dentry()
 168                  */
 169                 if (!IS_ERR_OR_NULL(ret))
 170                         dentry = ret;
 171
 172                 status = ocfs2_dentry_attach_lock(dentry, inode,
 173                                                   OCFS2_I(dir)->ip_blkno);
 174                 if (status) {
 175                         mlog_errno(status);
 176                         ret = ERR_PTR(status);
 177                         goto bail_unlock;
 178                 }
 179         } else
 180                 ocfs2_dentry_attach_gen(dentry);
 181
 182 bail_unlock:
 183         /* Don't drop the cluster lock until *after* the d_add --
 184          * unlink on another node will message us to remove that
 185          * dentry under this lock so otherwise we can race this with
 186          * the downconvert thread and have a stale dentry. */
 187         ocfs2_inode_unlock(dir, 0);
 188
 189 bail:
 190
 191         trace_ocfs2_lookup_ret(ret);
 192
 193         return ret;
 194 }
 195
 196 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
 197 {
 198         struct inode *inode;
 199
 200         inode = new_inode(dir->i_sb);
 201         if (!inode) {
 202                 mlog(ML_ERROR, "new_inode failed!\n");
 203                 return NULL;
 204         }
 205
 206         /* populate as many fields early on as possible - many of
 207          * these are used by the support functions here and in
 208          * callers. */
 209         if (S_ISDIR(mode))
 210                 set_nlink(inode, 2);
 211         inode_init_owner(inode, dir, mode);
 212         dquot_initialize(inode);
 213         return inode;
 214 }
 215
 216 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
 217                 struct dentry *dentry, struct inode *inode)
 218 {
 219         struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
 220
 221         ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
 222         ocfs2_lock_res_free(&dl->dl_lockres);
 223         BUG_ON(dl->dl_count != 1);
 224         spin_lock(&dentry_attach_lock);
 225         dentry->d_fsdata = NULL;
 226         spin_unlock(&dentry_attach_lock);
 227         kfree(dl);
 228         iput(inode);
 229 }
 230
 231 static int ocfs2_mknod(struct inode *dir,
 232                        struct dentry *dentry,
 233                        umode_t mode,
 234                        dev_t dev)
 235 {
 236         int status = 0;
 237         struct buffer_head *parent_fe_bh = NULL;
 238         handle_t *handle = NULL;
 239         struct ocfs2_super *osb;
 240         struct ocfs2_dinode *dirfe;
 241         struct buffer_head *new_fe_bh = NULL;
 242         struct inode *inode = NULL;
 243         struct ocfs2_alloc_context *inode_ac = NULL;
 244         struct ocfs2_alloc_context *data_ac = NULL;
 245         struct ocfs2_alloc_context *meta_ac = NULL;
 246         int want_clusters = 0;
 247         int want_meta = 0;
 248         int xattr_credits = 0;
 249         struct ocfs2_security_xattr_info si = {
 250                 .enable = 1,
 251         };
 252         int did_quota_inode = 0;
 253         struct ocfs2_dir_lookup_result lookup = { NULL, };
 254         sigset_t oldset;
 255         int did_block_signals = 0;
 256         struct posix_acl *default_acl = NULL, *acl = NULL;
 257         struct ocfs2_dentry_lock *dl = NULL;
 258
 259         trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 260                           (unsigned long long)OCFS2_I(dir)->ip_blkno,
 261                           (unsigned long)dev, mode);
 262
 263         dquot_initialize(dir);
 264
 265         /* get our super block */
 266         osb = OCFS2_SB(dir->i_sb);
 267
 268         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
 269         if (status < 0) {
 270                 if (status != -ENOENT)
 271                         mlog_errno(status);
 272                 return status;
 273         }
 274
 275         if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
 276                 status = -EMLINK;
 277                 goto leave;
 278         }
 279
 280         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
 281         if (!ocfs2_read_links_count(dirfe)) {
 282                 /* can't make a file in a deleted directory. */
 283                 status = -ENOENT;
 284                 goto leave;
 285         }
 286
 287         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 288                                            dentry->d_name.len);
 289         if (status)
 290                 goto leave;
 291
 292         /* get a spot inside the dir. */
 293         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 294                                               dentry->d_name.name,
 295                                               dentry->d_name.len, &lookup);
 296         if (status < 0) {
 297                 mlog_errno(status);
 298                 goto leave;
 299         }
 300
 301         /* reserve an inode spot */
 302         status = ocfs2_reserve_new_inode(osb, &inode_ac);
 303         if (status < 0) {
 304                 if (status != -ENOSPC)
 305                         mlog_errno(status);
 306                 goto leave;
 307         }
 308
 309         inode = ocfs2_get_init_inode(dir, mode);
 310         if (!inode) {
 311                 status = -ENOMEM;
 312                 mlog_errno(status);
 313                 goto leave;
 314         }
 315
 316         /* get security xattr */
 317         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
 318         if (status) {
 319                 if (status == -EOPNOTSUPP)
 320                         si.enable = 0;
 321                 else {
 322                         mlog_errno(status);
 323                         goto leave;
 324                 }
 325         }
 326
 327         /* calculate meta data/clusters for setting security and acl xattr */
 328         status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
 329                                        &si, &want_clusters,
 330                                        &xattr_credits, &want_meta);
 331         if (status < 0) {
 332                 mlog_errno(status);
 333                 goto leave;
 334         }
 335
 336         /* Reserve a cluster if creating an extent based directory. */
 337         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
 338                 want_clusters += 1;
 339
 340                 /* Dir indexing requires extra space as well */
 341                 if (ocfs2_supports_indexed_dirs(osb))
 342                         want_meta++;
 343         }
 344
 345         status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
 346         if (status < 0) {
 347                 if (status != -ENOSPC)
 348                         mlog_errno(status);
 349                 goto leave;
 350         }
 351
 352         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
 353         if (status < 0) {
 354                 if (status != -ENOSPC)
 355                         mlog_errno(status);
 356                 goto leave;
 357         }
 358
 359         status = posix_acl_create(dir, &mode, &default_acl, &acl);
 360         if (status) {
 361                 mlog_errno(status);
 362                 goto leave;
 363         }
 364
 365         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
 366                                                             S_ISDIR(mode),
 367                                                             xattr_credits));
 368         if (IS_ERR(handle)) {
 369                 status = PTR_ERR(handle);
 370                 handle = NULL;
 371                 mlog_errno(status);
 372                 goto leave;
 373         }
 374
 375         /* Starting to change things, restart is no longer possible. */
 376         ocfs2_block_signals(&oldset);
 377         did_block_signals = 1;
 378
 379         status = dquot_alloc_inode(inode);
 380         if (status)
 381                 goto leave;
 382         did_quota_inode = 1;
 383
 384         /* do the real work now. */
 385         status = ocfs2_mknod_locked(osb, dir, inode, dev,
 386                                     &new_fe_bh, parent_fe_bh, handle,
 387                                     inode_ac);
 388         if (status < 0) {
 389                 mlog_errno(status);
 390                 goto leave;
 391         }
 392
 393         if (S_ISDIR(mode)) {
 394                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
 395                                             new_fe_bh, data_ac, meta_ac);
 396                 if (status < 0) {
 397                         mlog_errno(status);
 398                         goto leave;
 399                 }
 400
 401                 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
 402                                                  parent_fe_bh,
 403                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 404                 if (status < 0) {
 405                         mlog_errno(status);
 406                         goto leave;
 407                 }
 408                 ocfs2_add_links_count(dirfe, 1);
 409                 ocfs2_journal_dirty(handle, parent_fe_bh);
 410                 inc_nlink(dir);
 411         }
 412
 413         if (default_acl) {
 414                 status = ocfs2_set_acl(handle, inode, new_fe_bh,
 415                                        ACL_TYPE_DEFAULT, default_acl,
 416                                        meta_ac, data_ac);
 417         }
 418         if (!status && acl) {
 419                 status = ocfs2_set_acl(handle, inode, new_fe_bh,
 420                                        ACL_TYPE_ACCESS, acl,
 421                                        meta_ac, data_ac);
 422         }
 423
 424         if (status < 0) {
 425                 mlog_errno(status);
 426                 goto leave;
 427         }
 428
 429         if (si.enable) {
 430                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
 431                                                  meta_ac, data_ac);
 432                 if (status < 0) {
 433                         mlog_errno(status);
 434                         goto leave;
 435                 }
 436         }
 437
 438         /*
 439          * Do this before adding the entry to the directory. We add
 440          * also set d_op after success so that ->d_iput() will cleanup
 441          * the dentry lock even if ocfs2_add_entry() fails below.
 442          */
 443         status = ocfs2_dentry_attach_lock(dentry, inode,
 444                                           OCFS2_I(dir)->ip_blkno);
 445         if (status) {
 446                 mlog_errno(status);
 447                 goto leave;
 448         }
 449
 450         dl = dentry->d_fsdata;
 451
 452         status = ocfs2_add_entry(handle, dentry, inode,
 453                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
 454                                  &lookup);
 455         if (status < 0) {
 456                 mlog_errno(status);
 457                 goto leave;
 458         }
 459
 460         insert_inode_hash(inode);
 461         d_instantiate(dentry, inode);
 462         status = 0;
 463 leave:
 464         if (default_acl)
 465                 posix_acl_release(default_acl);
 466         if (acl)
 467                 posix_acl_release(acl);
 468         if (status < 0 && did_quota_inode)
 469                 dquot_free_inode(inode);
 470         if (handle)
 471                 ocfs2_commit_trans(osb, handle);
 472
 473         ocfs2_inode_unlock(dir, 1);
 474         if (did_block_signals)
 475                 ocfs2_unblock_signals(&oldset);
 476
 477         brelse(new_fe_bh);
 478         brelse(parent_fe_bh);
 479         kfree(si.value);
 480
 481         ocfs2_free_dir_lookup_result(&lookup);
 482
 483         if (inode_ac)
 484                 ocfs2_free_alloc_context(inode_ac);
 485
 486         if (data_ac)
 487                 ocfs2_free_alloc_context(data_ac);
 488
 489         if (meta_ac)
 490                 ocfs2_free_alloc_context(meta_ac);
 491
 492         /*
 493          * We should call iput after the i_mutex of the bitmap been
 494          * unlocked in ocfs2_free_alloc_context, or the
 495          * ocfs2_delete_inode will mutex_lock again.
 496          */
 497         if ((status < 0) && inode) {
 498                 if (dl)
 499                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
 500
 501                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
 502                 clear_nlink(inode);
 503                 iput(inode);
 504         }
 505
 506         if (status)
 507                 mlog_errno(status);
 508
 509         return status;
 510 }
 511
 512 static int __ocfs2_mknod_locked(struct inode *dir,
 513                                 struct inode *inode,
 514                                 dev_t dev,
 515                                 struct buffer_head **new_fe_bh,
 516                                 struct buffer_head *parent_fe_bh,
 517                                 handle_t *handle,
 518                                 struct ocfs2_alloc_context *inode_ac,
 519                                 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
 520 {
 521         int status = 0;
 522         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 523         struct ocfs2_dinode *fe = NULL;
 524         struct ocfs2_extent_list *fel;
 525         u16 feat;
 526         struct ocfs2_inode_info *oi = OCFS2_I(inode);
 527
 528         *new_fe_bh = NULL;
 529
 530         /* populate as many fields early on as possible - many of
 531          * these are used by the support functions here and in
 532          * callers. */
 533         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
 534         OCFS2_I(inode)->ip_blkno = fe_blkno;
 535         spin_lock(&osb->osb_lock);
 536         inode->i_generation = osb->s_next_generation++;
 537         spin_unlock(&osb->osb_lock);
 538
 539         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
 540         if (!*new_fe_bh) {
 541                 status = -ENOMEM;
 542                 mlog_errno(status);
 543                 goto leave;
 544         }
 545         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
 546
 547         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
 548                                          *new_fe_bh,
 549                                          OCFS2_JOURNAL_ACCESS_CREATE);
 550         if (status < 0) {
 551                 mlog_errno(status);
 552                 goto leave;
 553         }
 554
 555         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
 556         memset(fe, 0, osb->sb->s_blocksize);
 557
 558         fe->i_generation = cpu_to_le32(inode->i_generation);
 559         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
 560         fe->i_blkno = cpu_to_le64(fe_blkno);
 561         fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
 562         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
 563         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
 564         fe->i_uid = cpu_to_le32(i_uid_read(inode));
 565         fe->i_gid = cpu_to_le32(i_gid_read(inode));
 566         fe->i_mode = cpu_to_le16(inode->i_mode);
 567         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 568                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
 569
 570         ocfs2_set_links_count(fe, inode->i_nlink);
 571
 572         fe->i_last_eb_blk = 0;
 573         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 574         fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
 575         fe->i_atime = fe->i_ctime = fe->i_mtime =
 576                 cpu_to_le64(CURRENT_TIME.tv_sec);
 577         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
 578                 cpu_to_le32(CURRENT_TIME.tv_nsec);
 579         fe->i_dtime = 0;
 580
 581         /*
 582          * If supported, directories start with inline data. If inline
 583          * isn't supported, but indexing is, we start them as indexed.
 584          */
 585         feat = le16_to_cpu(fe->i_dyn_features);
 586         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
 587                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
 588
 589                 fe->id2.i_data.id_count = cpu_to_le16(
 590                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
 591         } else {
 592                 fel = &fe->id2.i_list;
 593                 fel->l_tree_depth = 0;
 594                 fel->l_next_free_rec = 0;
 595                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
 596         }
 597
 598         ocfs2_journal_dirty(handle, *new_fe_bh);
 599
 600         ocfs2_populate_inode(inode, fe, 1);
 601         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
 602         if (!ocfs2_mount_local(osb)) {
 603                 status = ocfs2_create_new_inode_locks(inode);
 604                 if (status < 0)
 605                         mlog_errno(status);
 606         }
 607
 608         oi->i_sync_tid = handle->h_transaction->t_tid;
 609         oi->i_datasync_tid = handle->h_transaction->t_tid;
 610
 611 leave:
 612         if (status < 0) {
 613                 if (*new_fe_bh) {
 614                         brelse(*new_fe_bh);
 615                         *new_fe_bh = NULL;
 616                 }
 617         }
 618
 619         if (status)
 620                 mlog_errno(status);
 621         return status;
 622 }
 623
 624 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 625                               struct inode *dir,
 626                               struct inode *inode,
 627                               dev_t dev,
 628                               struct buffer_head **new_fe_bh,
 629                               struct buffer_head *parent_fe_bh,
 630                               handle_t *handle,
 631                               struct ocfs2_alloc_context *inode_ac)
 632 {
 633         int status = 0;
 634         u64 suballoc_loc, fe_blkno = 0;
 635         u16 suballoc_bit;
 636
 637         *new_fe_bh = NULL;
 638
 639         status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
 640                                        inode_ac, &suballoc_loc,
 641                                        &suballoc_bit, &fe_blkno);
 642         if (status < 0) {
 643                 mlog_errno(status);
 644                 return status;
 645         }
 646
 647         return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
 648                                     parent_fe_bh, handle, inode_ac,
 649                                     fe_blkno, suballoc_loc, suballoc_bit);
 650 }
 651
 652 static int ocfs2_mkdir(struct inode *dir,
 653                        struct dentry *dentry,
 654                        umode_t mode)
 655 {
 656         int ret;
 657
 658         trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 659                           OCFS2_I(dir)->ip_blkno, mode);
 660         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
 661         if (ret)
 662                 mlog_errno(ret);
 663
 664         return ret;
 665 }
 666
 667 static int ocfs2_create(struct inode *dir,
 668                         struct dentry *dentry,
 669                         umode_t mode,
 670                         bool excl)
 671 {
 672         int ret;
 673
 674         trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 675                            (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
 676         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
 677         if (ret)
 678                 mlog_errno(ret);
 679
 680         return ret;
 681 }
 682
 683 static int ocfs2_link(struct dentry *old_dentry,
 684                       struct inode *dir,
 685                       struct dentry *dentry)
 686 {
 687         handle_t *handle;
 688         struct inode *inode = old_dentry->d_inode;
 689         struct inode *old_dir = old_dentry->d_parent->d_inode;
 690         int err;
 691         struct buffer_head *fe_bh = NULL;
 692         struct buffer_head *old_dir_bh = NULL;
 693         struct buffer_head *parent_fe_bh = NULL;
 694         struct ocfs2_dinode *fe = NULL;
 695         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 696         struct ocfs2_dir_lookup_result lookup = { NULL, };
 697         sigset_t oldset;
 698         u64 old_de_ino;
 699
 700         trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
 701                          old_dentry->d_name.len, old_dentry->d_name.name,
 702                          dentry->d_name.len, dentry->d_name.name);
 703
 704         if (S_ISDIR(inode->i_mode))
 705                 return -EPERM;
 706
 707         dquot_initialize(dir);
 708
 709         err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
 710                         &parent_fe_bh, dir, 0);
 711         if (err < 0) {
 712                 if (err != -ENOENT)
 713                         mlog_errno(err);
 714                 return err;
 715         }
 716
 717         /* make sure both dirs have bhs
 718          * get an extra ref on old_dir_bh if old==new */
 719         if (!parent_fe_bh) {
 720                 if (old_dir_bh) {
 721                         parent_fe_bh = old_dir_bh;
 722                         get_bh(parent_fe_bh);
 723                 } else {
 724                         mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
 725                         err = -EIO;
 726                         goto out;
 727                 }
 728         }
 729
 730         if (!dir->i_nlink) {
 731                 err = -ENOENT;
 732                 goto out;
 733         }
 734
 735         err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
 736                         old_dentry->d_name.len, &old_de_ino);
 737         if (err) {
 738                 err = -ENOENT;
 739                 goto out;
 740         }
 741
 742         /*
 743          * Check whether another node removed the source inode while we
 744          * were in the vfs.
 745          */
 746         if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
 747                 err = -ENOENT;
 748                 goto out;
 749         }
 750
 751         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 752                                         dentry->d_name.len);
 753         if (err)
 754                 goto out;
 755
 756         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 757                                            dentry->d_name.name,
 758                                            dentry->d_name.len, &lookup);
 759         if (err < 0) {
 760                 mlog_errno(err);
 761                 goto out;
 762         }
 763
 764         err = ocfs2_inode_lock(inode, &fe_bh, 1);
 765         if (err < 0) {
 766                 if (err != -ENOENT)
 767                         mlog_errno(err);
 768                 goto out;
 769         }
 770
 771         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 772         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
 773                 err = -EMLINK;
 774                 goto out_unlock_inode;
 775         }
 776
 777         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
 778         if (IS_ERR(handle)) {
 779                 err = PTR_ERR(handle);
 780                 handle = NULL;
 781                 mlog_errno(err);
 782                 goto out_unlock_inode;
 783         }
 784
 785         /* Starting to change things, restart is no longer possible. */
 786         ocfs2_block_signals(&oldset);
 787
 788         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 789                                       OCFS2_JOURNAL_ACCESS_WRITE);
 790         if (err < 0) {
 791                 mlog_errno(err);
 792                 goto out_commit;
 793         }
 794
 795         inc_nlink(inode);
 796         inode->i_ctime = CURRENT_TIME;
 797         ocfs2_set_links_count(fe, inode->i_nlink);
 798         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 799         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 800         ocfs2_journal_dirty(handle, fe_bh);
 801
 802         err = ocfs2_add_entry(handle, dentry, inode,
 803                               OCFS2_I(inode)->ip_blkno,
 804                               parent_fe_bh, &lookup);
 805         if (err) {
 806                 ocfs2_add_links_count(fe, -1);
 807                 drop_nlink(inode);
 808                 mlog_errno(err);
 809                 goto out_commit;
 810         }
 811
 812         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
 813         if (err) {
 814                 mlog_errno(err);
 815                 goto out_commit;
 816         }
 817
 818         ihold(inode);
 819         d_instantiate(dentry, inode);
 820
 821 out_commit:
 822         ocfs2_commit_trans(osb, handle);
 823         ocfs2_unblock_signals(&oldset);
 824 out_unlock_inode:
 825         ocfs2_inode_unlock(inode, 1);
 826
 827 out:
 828         ocfs2_double_unlock(old_dir, dir);
 829
 830         brelse(fe_bh);
 831         brelse(parent_fe_bh);
 832         brelse(old_dir_bh);
 833
 834         ocfs2_free_dir_lookup_result(&lookup);
 835
 836         if (err)
 837                 mlog_errno(err);
 838
 839         return err;
 840 }
 841
 842 /*
 843  * Takes and drops an exclusive lock on the given dentry. This will
 844  * force other nodes to drop it.
 845  */
 846 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 847 {
 848         int ret;
 849
 850         ret = ocfs2_dentry_lock(dentry, 1);
 851         if (ret)
 852                 mlog_errno(ret);
 853         else
 854                 ocfs2_dentry_unlock(dentry, 1);
 855
 856         return ret;
 857 }
 858
 859 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
 860 {
 861         if (S_ISDIR(inode->i_mode)) {
 862                 if (inode->i_nlink == 2)
 863                         return 1;
 864                 return 0;
 865         }
 866
 867         if (inode->i_nlink == 1)
 868                 return 1;
 869         return 0;
 870 }
 871
 872 static int ocfs2_unlink(struct inode *dir,
 873                         struct dentry *dentry)
 874 {
 875         int status;
 876         int child_locked = 0;
 877         bool is_unlinkable = false;
 878         struct inode *inode = dentry->d_inode;
 879         struct inode *orphan_dir = NULL;
 880         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 881         u64 blkno;
 882         struct ocfs2_dinode *fe = NULL;
 883         struct buffer_head *fe_bh = NULL;
 884         struct buffer_head *parent_node_bh = NULL;
 885         handle_t *handle = NULL;
 886         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 887         struct ocfs2_dir_lookup_result lookup = { NULL, };
 888         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
 889
 890         trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
 891                            dentry->d_name.name,
 892                            (unsigned long long)OCFS2_I(dir)->ip_blkno,
 893                            (unsigned long long)OCFS2_I(inode)->ip_blkno);
 894
 895         dquot_initialize(dir);
 896
 897         BUG_ON(dentry->d_parent->d_inode != dir);
 898
 899         if (inode == osb->root_inode)
 900                 return -EPERM;
 901
 902         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
 903                                          OI_LS_PARENT);
 904         if (status < 0) {
 905                 if (status != -ENOENT)
 906                         mlog_errno(status);
 907                 return status;
 908         }
 909
 910         status = ocfs2_find_files_on_disk(dentry->d_name.name,
 911                                           dentry->d_name.len, &blkno, dir,
 912                                           &lookup);
 913         if (status < 0) {
 914                 if (status != -ENOENT)
 915                         mlog_errno(status);
 916                 goto leave;
 917         }
 918
 919         if (OCFS2_I(inode)->ip_blkno != blkno) {
 920                 status = -ENOENT;
 921
 922                 trace_ocfs2_unlink_noent(
 923                                 (unsigned long long)OCFS2_I(inode)->ip_blkno,
 924                                 (unsigned long long)blkno,
 925                                 OCFS2_I(inode)->ip_flags);
 926                 goto leave;
 927         }
 928
 929         status = ocfs2_inode_lock(inode, &fe_bh, 1);
 930         if (status < 0) {
 931                 if (status != -ENOENT)
 932                         mlog_errno(status);
 933                 goto leave;
 934         }
 935         child_locked = 1;
 936
 937         if (S_ISDIR(inode->i_mode)) {
 938                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
 939                         status = -ENOTEMPTY;
 940                         goto leave;
 941                 }
 942         }
 943
 944         status = ocfs2_remote_dentry_delete(dentry);
 945         if (status < 0) {
 946                 /* This remote delete should succeed under all normal
 947                  * circumstances. */
 948                 mlog_errno(status);
 949                 goto leave;
 950         }
 951
 952         if (ocfs2_inode_is_unlinkable(inode)) {
 953                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
 954                                                   OCFS2_I(inode)->ip_blkno,
 955                                                   orphan_name, &orphan_insert);
 956                 if (status < 0) {
 957                         mlog_errno(status);
 958                         goto leave;
 959                 }
 960                 is_unlinkable = true;
 961         }
 962
 963         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
 964         if (IS_ERR(handle)) {
 965                 status = PTR_ERR(handle);
 966                 handle = NULL;
 967                 mlog_errno(status);
 968                 goto leave;
 969         }
 970
 971         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 972                                          OCFS2_JOURNAL_ACCESS_WRITE);
 973         if (status < 0) {
 974                 mlog_errno(status);
 975                 goto leave;
 976         }
 977
 978         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 979
 980         /* delete the name from the parent dir */
 981         status = ocfs2_delete_entry(handle, dir, &lookup);
 982         if (status < 0) {
 983                 mlog_errno(status);
 984                 goto leave;
 985         }
 986
 987         if (S_ISDIR(inode->i_mode))
 988                 drop_nlink(inode);
 989         drop_nlink(inode);
 990         ocfs2_set_links_count(fe, inode->i_nlink);
 991         ocfs2_journal_dirty(handle, fe_bh);
 992
 993         dir->i_ctime = dir->i_mtime = CURRENT_TIME;
 994         if (S_ISDIR(inode->i_mode))
 995                 drop_nlink(dir);
 996
 997         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
 998         if (status < 0) {
 999                 mlog_errno(status);
1000                 if (S_ISDIR(inode->i_mode))
1001                         inc_nlink(dir);
1002                 goto leave;
1003         }
1004
1005         if (is_unlinkable) {
1006                 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1007                                 orphan_name, &orphan_insert, orphan_dir);
1008                 if (status < 0)
1009                         mlog_errno(status);
1010         }
1011
1012 leave:
1013         if (handle)
1014                 ocfs2_commit_trans(osb, handle);
1015
1016         if (child_locked)
1017                 ocfs2_inode_unlock(inode, 1);
1018
1019         ocfs2_inode_unlock(dir, 1);
1020
1021         if (orphan_dir) {
1022                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1023                 ocfs2_inode_unlock(orphan_dir, 1);
1024                 mutex_unlock(&orphan_dir->i_mutex);
1025                 iput(orphan_dir);
1026         }
1027
1028         brelse(fe_bh);
1029         brelse(parent_node_bh);
1030
1031         ocfs2_free_dir_lookup_result(&orphan_insert);
1032         ocfs2_free_dir_lookup_result(&lookup);
1033
1034         if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1035                 mlog_errno(status);
1036
1037         return status;
1038 }
1039
1040 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1041                 u64 src_inode_no, u64 dest_inode_no)
1042 {
1043         int ret = 0, i = 0;
1044         u64 parent_inode_no = 0;
1045         u64 child_inode_no = src_inode_no;
1046         struct inode *child_inode;
1047
1048 #define MAX_LOOKUP_TIMES 32
1049         while (1) {
1050                 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1051                 if (IS_ERR(child_inode)) {
1052                         ret = PTR_ERR(child_inode);
1053                         break;
1054                 }
1055
1056                 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1057                 if (ret < 0) {
1058                         iput(child_inode);
1059                         if (ret != -ENOENT)
1060                                 mlog_errno(ret);
1061                         break;
1062                 }
1063
1064                 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1065                                 &parent_inode_no);
1066                 ocfs2_inode_unlock(child_inode, 0);
1067                 iput(child_inode);
1068                 if (ret < 0) {
1069                         ret = -ENOENT;
1070                         break;
1071                 }
1072
1073                 if (parent_inode_no == dest_inode_no) {
1074                         ret = 1;
1075                         break;
1076                 }
1077
1078                 if (parent_inode_no == osb->root_inode->i_ino) {
1079                         ret = 0;
1080                         break;
1081                 }
1082
1083                 child_inode_no = parent_inode_no;
1084
1085                 if (++i >= MAX_LOOKUP_TIMES) {
1086                         mlog(ML_NOTICE, "max lookup times reached, filesystem "
1087                                         "may have nested directories, "
1088                                         "src inode: %llu, dest inode: %llu.\n",
1089                                         (unsigned long long)src_inode_no,
1090                                         (unsigned long long)dest_inode_no);
1091                         ret = 0;
1092                         break;
1093                 }
1094         }
1095
1096         return ret;
1097 }
1098
1099 /*
1100  * The only place this should be used is rename and link!
1101  * if they have the same id, then the 1st one is the only one locked.
1102  */
1103 static int ocfs2_double_lock(struct ocfs2_super *osb,
1104                              struct buffer_head **bh1,
1105                              struct inode *inode1,
1106                              struct buffer_head **bh2,
1107                              struct inode *inode2,
1108                              int rename)
1109 {
1110         int status;
1111         int inode1_is_ancestor, inode2_is_ancestor;
1112         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1113         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1114         struct buffer_head **tmpbh;
1115         struct inode *tmpinode;
1116
1117         trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1118                                 (unsigned long long)oi2->ip_blkno);
1119
1120         if (*bh1)
1121                 *bh1 = NULL;
1122         if (*bh2)
1123                 *bh2 = NULL;
1124
1125         /* we always want to lock the one with the lower lockid first.
1126          * and if they are nested, we lock ancestor first */
1127         if (oi1->ip_blkno != oi2->ip_blkno) {
1128                 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1129                                 oi1->ip_blkno);
1130                 if (inode1_is_ancestor < 0) {
1131                         status = inode1_is_ancestor;
1132                         goto bail;
1133                 }
1134
1135                 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1136                                 oi2->ip_blkno);
1137                 if (inode2_is_ancestor < 0) {
1138                         status = inode2_is_ancestor;
1139                         goto bail;
1140                 }
1141
1142                 if ((inode1_is_ancestor == 1) ||
1143                                 (oi1->ip_blkno < oi2->ip_blkno &&
1144                                 inode2_is_ancestor == 0)) {
1145                         /* switch id1 and id2 around */
1146                         tmpbh = bh2;
1147                         bh2 = bh1;
1148                         bh1 = tmpbh;
1149
1150                         tmpinode = inode2;
1151                         inode2 = inode1;
1152                         inode1 = tmpinode;
1153                 }
1154                 /* lock id2 */
1155                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1156                                 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1157                 if (status < 0) {
1158                         if (status != -ENOENT)
1159                                 mlog_errno(status);
1160                         goto bail;
1161                 }
1162         }
1163
1164         /* lock id1 */
1165         status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1166                         rename == 1 ?  OI_LS_RENAME2 : OI_LS_PARENT);
1167         if (status < 0) {
1168                 /*
1169                  * An error return must mean that no cluster locks
1170                  * were held on function exit.
1171                  */
1172                 if (oi1->ip_blkno != oi2->ip_blkno) {
1173                         ocfs2_inode_unlock(inode2, 1);
1174                         brelse(*bh2);
1175                         *bh2 = NULL;
1176                 }
1177
1178                 if (status != -ENOENT)
1179                         mlog_errno(status);
1180         }
1181
1182         trace_ocfs2_double_lock_end(
1183                         (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1184                         (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1185
1186 bail:
1187         if (status)
1188                 mlog_errno(status);
1189         return status;
1190 }
1191
1192 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1193 {
1194         ocfs2_inode_unlock(inode1, 1);
1195
1196         if (inode1 != inode2)
1197                 ocfs2_inode_unlock(inode2, 1);
1198 }
1199
1200 static int ocfs2_rename(struct inode *old_dir,
1201                         struct dentry *old_dentry,
1202                         struct inode *new_dir,
1203                         struct dentry *new_dentry)
1204 {
1205         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1206         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1207         struct inode *old_inode = old_dentry->d_inode;
1208         struct inode *new_inode = new_dentry->d_inode;
1209         struct inode *orphan_dir = NULL;
1210         struct ocfs2_dinode *newfe = NULL;
1211         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1212         struct buffer_head *newfe_bh = NULL;
1213         struct buffer_head *old_inode_bh = NULL;
1214         struct ocfs2_super *osb = NULL;
1215         u64 newfe_blkno, old_de_ino;
1216         handle_t *handle = NULL;
1217         struct buffer_head *old_dir_bh = NULL;
1218         struct buffer_head *new_dir_bh = NULL;
1219         u32 old_dir_nlink = old_dir->i_nlink;
1220         struct ocfs2_dinode *old_di;
1221         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1222         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1223         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1224         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1225         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1226         bool should_add_orphan = false;
1227
1228         /* At some point it might be nice to break this function up a
1229          * bit. */
1230
1231         trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1232                            old_dentry->d_name.len, old_dentry->d_name.name,
1233                            new_dentry->d_name.len, new_dentry->d_name.name);
1234
1235         dquot_initialize(old_dir);
1236         dquot_initialize(new_dir);
1237
1238         osb = OCFS2_SB(old_dir->i_sb);
1239
1240         if (new_inode) {
1241                 if (!igrab(new_inode))
1242                         BUG();
1243         }
1244
1245         /* Assume a directory hierarchy thusly:
1246          * a/b/c
1247          * a/d
1248          * a,b,c, and d are all directories.
1249          *
1250          * from cwd of 'a' on both nodes:
1251          * node1: mv b/c d
1252          * node2: mv d   b/c
1253          *
1254          * And that's why, just like the VFS, we need a file system
1255          * rename lock. */
1256         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1257                 status = ocfs2_rename_lock(osb);
1258                 if (status < 0) {
1259                         mlog_errno(status);
1260                         goto bail;
1261                 }
1262                 rename_lock = 1;
1263
1264                 /* here we cannot guarantee the inodes haven't just been
1265                  * changed, so check if they are nested again */
1266                 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1267                                 old_inode->i_ino);
1268                 if (status < 0) {
1269                         mlog_errno(status);
1270                         goto bail;
1271                 } else if (status == 1) {
1272                         status = -EPERM;
1273                         trace_ocfs2_rename_not_permitted(
1274                                         (unsigned long long)old_inode->i_ino,
1275                                         (unsigned long long)new_dir->i_ino);
1276                         goto bail;
1277                 }
1278         }
1279
1280         /* if old and new are the same, this'll just do one lock. */
1281         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1282                                    &new_dir_bh, new_dir, 1);
1283         if (status < 0) {
1284                 mlog_errno(status);
1285                 goto bail;
1286         }
1287         parents_locked = 1;
1288
1289         /* make sure both dirs have bhs
1290          * get an extra ref on old_dir_bh if old==new */
1291         if (!new_dir_bh) {
1292                 if (old_dir_bh) {
1293                         new_dir_bh = old_dir_bh;
1294                         get_bh(new_dir_bh);
1295                 } else {
1296                         mlog(ML_ERROR, "no old_dir_bh!\n");
1297                         status = -EIO;
1298                         goto bail;
1299                 }
1300         }
1301
1302         /*
1303          * Aside from allowing a meta data update, the locking here
1304          * also ensures that the downconvert thread on other nodes
1305          * won't have to concurrently downconvert the inode and the
1306          * dentry locks.
1307          */
1308         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1309                                          OI_LS_PARENT);
1310         if (status < 0) {
1311                 if (status != -ENOENT)
1312                         mlog_errno(status);
1313                 goto bail;
1314         }
1315         old_child_locked = 1;
1316
1317         status = ocfs2_remote_dentry_delete(old_dentry);
1318         if (status < 0) {
1319                 mlog_errno(status);
1320                 goto bail;
1321         }
1322
1323         if (S_ISDIR(old_inode->i_mode)) {
1324                 u64 old_inode_parent;
1325
1326                 update_dot_dot = 1;
1327                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1328                                                   old_inode,
1329                                                   &old_inode_dot_dot_res);
1330                 if (status) {
1331                         status = -EIO;
1332                         goto bail;
1333                 }
1334
1335                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1336                         status = -EIO;
1337                         goto bail;
1338                 }
1339
1340                 if (!new_inode && new_dir != old_dir &&
1341                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1342                         status = -EMLINK;
1343                         goto bail;
1344                 }
1345         }
1346
1347         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1348                                             old_dentry->d_name.len,
1349                                             &old_de_ino);
1350         if (status) {
1351                 status = -ENOENT;
1352                 goto bail;
1353         }
1354
1355         /*
1356          *  Check for inode number is _not_ due to possible IO errors.
1357          *  We might rmdir the source, keep it as pwd of some process
1358          *  and merrily kill the link to whatever was created under the
1359          *  same name. Goodbye sticky bit ;-<
1360          */
1361         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1362                 status = -ENOENT;
1363                 goto bail;
1364         }
1365
1366         /* check if the target already exists (in which case we need
1367          * to delete it */
1368         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1369                                           new_dentry->d_name.len,
1370                                           &newfe_blkno, new_dir,
1371                                           &target_lookup_res);
1372         /* The only error we allow here is -ENOENT because the new
1373          * file not existing is perfectly valid. */
1374         if ((status < 0) && (status != -ENOENT)) {
1375                 /* If we cannot find the file specified we should just */
1376                 /* return the error... */
1377                 mlog_errno(status);
1378                 goto bail;
1379         }
1380         if (status == 0)
1381                 target_exists = 1;
1382
1383         if (!target_exists && new_inode) {
1384                 /*
1385                  * Target was unlinked by another node while we were
1386                  * waiting to get to ocfs2_rename(). There isn't
1387                  * anything we can do here to help the situation, so
1388                  * bubble up the appropriate error.
1389                  */
1390                 status = -ENOENT;
1391                 goto bail;
1392         }
1393
1394         /* In case we need to overwrite an existing file, we blow it
1395          * away first */
1396         if (target_exists) {
1397                 /* VFS didn't think there existed an inode here, but
1398                  * someone else in the cluster must have raced our
1399                  * rename to create one. Today we error cleanly, in
1400                  * the future we should consider calling iget to build
1401                  * a new struct inode for this entry. */
1402                 if (!new_inode) {
1403                         status = -EACCES;
1404
1405                         trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1406                                                 new_dentry->d_name.name);
1407                         goto bail;
1408                 }
1409
1410                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1411                         status = -EACCES;
1412
1413                         trace_ocfs2_rename_disagree(
1414                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1415                              (unsigned long long)newfe_blkno,
1416                              OCFS2_I(new_inode)->ip_flags);
1417                         goto bail;
1418                 }
1419
1420                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1421                 if (status < 0) {
1422                         if (status != -ENOENT)
1423                                 mlog_errno(status);
1424                         goto bail;
1425                 }
1426                 new_child_locked = 1;
1427
1428                 status = ocfs2_remote_dentry_delete(new_dentry);
1429                 if (status < 0) {
1430                         mlog_errno(status);
1431                         goto bail;
1432                 }
1433
1434                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1435
1436                 trace_ocfs2_rename_over_existing(
1437                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1438                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1439
1440                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1441                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1442                                                 OCFS2_I(new_inode)->ip_blkno,
1443                                                 orphan_name, &orphan_insert);
1444                         if (status < 0) {
1445                                 mlog_errno(status);
1446                                 goto bail;
1447                         }
1448                         should_add_orphan = true;
1449                 }
1450         } else {
1451                 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1452
1453                 status = ocfs2_check_dir_for_entry(new_dir,
1454                                                    new_dentry->d_name.name,
1455                                                    new_dentry->d_name.len);
1456                 if (status)
1457                         goto bail;
1458
1459                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1460                                                       new_dentry->d_name.name,
1461                                                       new_dentry->d_name.len,
1462                                                       &target_insert);
1463                 if (status < 0) {
1464                         mlog_errno(status);
1465                         goto bail;
1466                 }
1467         }
1468
1469         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1470         if (IS_ERR(handle)) {
1471                 status = PTR_ERR(handle);
1472                 handle = NULL;
1473                 mlog_errno(status);
1474                 goto bail;
1475         }
1476
1477         if (target_exists) {
1478                 if (S_ISDIR(new_inode->i_mode)) {
1479                         if (new_inode->i_nlink != 2 ||
1480                             !ocfs2_empty_dir(new_inode)) {
1481                                 status = -ENOTEMPTY;
1482                                 goto bail;
1483                         }
1484                 }
1485                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1486                                                  newfe_bh,
1487                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1488                 if (status < 0) {
1489                         mlog_errno(status);
1490                         goto bail;
1491                 }
1492
1493                 /* change the dirent to point to the correct inode */
1494                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1495                                             old_inode);
1496                 if (status < 0) {
1497                         mlog_errno(status);
1498                         goto bail;
1499                 }
1500                 new_dir->i_version++;
1501
1502                 if (S_ISDIR(new_inode->i_mode))
1503                         ocfs2_set_links_count(newfe, 0);
1504                 else
1505                         ocfs2_add_links_count(newfe, -1);
1506                 ocfs2_journal_dirty(handle, newfe_bh);
1507                 if (should_add_orphan) {
1508                         status = ocfs2_orphan_add(osb, handle, new_inode,
1509                                         newfe_bh, orphan_name,
1510                                         &orphan_insert, orphan_dir);
1511                         if (status < 0) {
1512                                 mlog_errno(status);
1513                                 goto bail;
1514                         }
1515                 }
1516         } else {
1517                 /* if the name was not found in new_dir, add it now */
1518                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1519                                          OCFS2_I(old_inode)->ip_blkno,
1520                                          new_dir_bh, &target_insert);
1521         }
1522
1523         old_inode->i_ctime = CURRENT_TIME;
1524         mark_inode_dirty(old_inode);
1525
1526         status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1527                                          old_inode_bh,
1528                                          OCFS2_JOURNAL_ACCESS_WRITE);
1529         if (status >= 0) {
1530                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1531
1532                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1533                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1534                 ocfs2_journal_dirty(handle, old_inode_bh);
1535         } else
1536                 mlog_errno(status);
1537
1538         /*
1539          * Now that the name has been added to new_dir, remove the old name.
1540          *
1541          * We don't keep any directory entry context around until now
1542          * because the insert might have changed the type of directory
1543          * we're dealing with.
1544          */
1545         status = ocfs2_find_entry(old_dentry->d_name.name,
1546                                   old_dentry->d_name.len, old_dir,
1547                                   &old_entry_lookup);
1548         if (status)
1549                 goto bail;
1550
1551         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1552         if (status < 0) {
1553                 mlog_errno(status);
1554                 goto bail;
1555         }
1556
1557         if (new_inode) {
1558                 drop_nlink(new_inode);
1559                 new_inode->i_ctime = CURRENT_TIME;
1560         }
1561         old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1562
1563         if (update_dot_dot) {
1564                 status = ocfs2_update_entry(old_inode, handle,
1565                                             &old_inode_dot_dot_res, new_dir);
1566                 drop_nlink(old_dir);
1567                 if (new_inode) {
1568                         drop_nlink(new_inode);
1569                 } else {
1570                         inc_nlink(new_dir);
1571                         mark_inode_dirty(new_dir);
1572                 }
1573         }
1574         mark_inode_dirty(old_dir);
1575         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1576         if (new_inode) {
1577                 mark_inode_dirty(new_inode);
1578                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1579         }
1580
1581         if (old_dir != new_dir) {
1582                 /* Keep the same times on both directories.*/
1583                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1584
1585                 /*
1586                  * This will also pick up the i_nlink change from the
1587                  * block above.
1588                  */
1589                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1590         }
1591
1592         if (old_dir_nlink != old_dir->i_nlink) {
1593                 if (!old_dir_bh) {
1594                         mlog(ML_ERROR, "need to change nlink for old dir "
1595                              "%llu from %d to %d but bh is NULL!\n",
1596                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1597                              (int)old_dir_nlink, old_dir->i_nlink);
1598                 } else {
1599                         struct ocfs2_dinode *fe;
1600                         status = ocfs2_journal_access_di(handle,
1601                                                          INODE_CACHE(old_dir),
1602                                                          old_dir_bh,
1603                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1604                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1605                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1606                         ocfs2_journal_dirty(handle, old_dir_bh);
1607                 }
1608         }
1609         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1610         status = 0;
1611 bail:
1612         if (rename_lock)
1613                 ocfs2_rename_unlock(osb);
1614
1615         if (handle)
1616                 ocfs2_commit_trans(osb, handle);
1617
1618         if (parents_locked)
1619                 ocfs2_double_unlock(old_dir, new_dir);
1620
1621         if (old_child_locked)
1622                 ocfs2_inode_unlock(old_inode, 1);
1623
1624         if (new_child_locked)
1625                 ocfs2_inode_unlock(new_inode, 1);
1626
1627         if (orphan_dir) {
1628                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1629                 ocfs2_inode_unlock(orphan_dir, 1);
1630                 mutex_unlock(&orphan_dir->i_mutex);
1631                 iput(orphan_dir);
1632         }
1633
1634         if (new_inode)
1635                 sync_mapping_buffers(old_inode->i_mapping);
1636
1637         if (new_inode)
1638                 iput(new_inode);
1639
1640         ocfs2_free_dir_lookup_result(&target_lookup_res);
1641         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1642         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1643         ocfs2_free_dir_lookup_result(&orphan_insert);
1644         ocfs2_free_dir_lookup_result(&target_insert);
1645
1646         brelse(newfe_bh);
1647         brelse(old_inode_bh);
1648         brelse(old_dir_bh);
1649         brelse(new_dir_bh);
1650
1651         if (status)
1652                 mlog_errno(status);
1653
1654         return status;
1655 }
1656
1657 /*
1658  * we expect i_size = strlen(symname). Copy symname into the file
1659  * data, including the null terminator.
1660  */
1661 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1662                                      handle_t *handle,
1663                                      struct inode *inode,
1664                                      const char *symname)
1665 {
1666         struct buffer_head **bhs = NULL;
1667         const char *c;
1668         struct super_block *sb = osb->sb;
1669         u64 p_blkno, p_blocks;
1670         int virtual, blocks, status, i, bytes_left;
1671
1672         bytes_left = i_size_read(inode) + 1;
1673         /* we can't trust i_blocks because we're actually going to
1674          * write i_size + 1 bytes. */
1675         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1676
1677         trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1678                                         i_size_read(inode), blocks);
1679
1680         /* Sanity check -- make sure we're going to fit. */
1681         if (bytes_left >
1682             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1683                 status = -EIO;
1684                 mlog_errno(status);
1685                 goto bail;
1686         }
1687
1688         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1689         if (!bhs) {
1690                 status = -ENOMEM;
1691                 mlog_errno(status);
1692                 goto bail;
1693         }
1694
1695         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1696                                              NULL);
1697         if (status < 0) {
1698                 mlog_errno(status);
1699                 goto bail;
1700         }
1701
1702         /* links can never be larger than one cluster so we know this
1703          * is all going to be contiguous, but do a sanity check
1704          * anyway. */
1705         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1706                 status = -EIO;
1707                 mlog_errno(status);
1708                 goto bail;
1709         }
1710
1711         virtual = 0;
1712         while(bytes_left > 0) {
1713                 c = &symname[virtual * sb->s_blocksize];
1714
1715                 bhs[virtual] = sb_getblk(sb, p_blkno);
1716                 if (!bhs[virtual]) {
1717                         status = -ENOMEM;
1718                         mlog_errno(status);
1719                         goto bail;
1720                 }
1721                 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1722                                               bhs[virtual]);
1723
1724                 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1725                                               bhs[virtual],
1726                                               OCFS2_JOURNAL_ACCESS_CREATE);
1727                 if (status < 0) {
1728                         mlog_errno(status);
1729                         goto bail;
1730                 }
1731
1732                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1733
1734                 memcpy(bhs[virtual]->b_data, c,
1735                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1736                        bytes_left);
1737
1738                 ocfs2_journal_dirty(handle, bhs[virtual]);
1739
1740                 virtual++;
1741                 p_blkno++;
1742                 bytes_left -= sb->s_blocksize;
1743         }
1744
1745         status = 0;
1746 bail:
1747
1748         if (bhs) {
1749                 for(i = 0; i < blocks; i++)
1750                         brelse(bhs[i]);
1751                 kfree(bhs);
1752         }
1753
1754         if (status)
1755                 mlog_errno(status);
1756         return status;
1757 }
1758
1759 static int ocfs2_symlink(struct inode *dir,
1760                          struct dentry *dentry,
1761                          const char *symname)
1762 {
1763         int status, l, credits;
1764         u64 newsize;
1765         struct ocfs2_super *osb = NULL;
1766         struct inode *inode = NULL;
1767         struct super_block *sb;
1768         struct buffer_head *new_fe_bh = NULL;
1769         struct buffer_head *parent_fe_bh = NULL;
1770         struct ocfs2_dinode *fe = NULL;
1771         struct ocfs2_dinode *dirfe;
1772         handle_t *handle = NULL;
1773         struct ocfs2_alloc_context *inode_ac = NULL;
1774         struct ocfs2_alloc_context *data_ac = NULL;
1775         struct ocfs2_alloc_context *xattr_ac = NULL;
1776         int want_clusters = 0;
1777         int xattr_credits = 0;
1778         struct ocfs2_security_xattr_info si = {
1779                 .enable = 1,
1780         };
1781         int did_quota = 0, did_quota_inode = 0;
1782         struct ocfs2_dir_lookup_result lookup = { NULL, };
1783         sigset_t oldset;
1784         int did_block_signals = 0;
1785         struct ocfs2_dentry_lock *dl = NULL;
1786
1787         trace_ocfs2_symlink_begin(dir, dentry, symname,
1788                                   dentry->d_name.len, dentry->d_name.name);
1789
1790         dquot_initialize(dir);
1791
1792         sb = dir->i_sb;
1793         osb = OCFS2_SB(sb);
1794
1795         l = strlen(symname) + 1;
1796
1797         credits = ocfs2_calc_symlink_credits(sb);
1798
1799         /* lock the parent directory */
1800         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1801         if (status < 0) {
1802                 if (status != -ENOENT)
1803                         mlog_errno(status);
1804                 return status;
1805         }
1806
1807         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1808         if (!ocfs2_read_links_count(dirfe)) {
1809                 /* can't make a file in a deleted directory. */
1810                 status = -ENOENT;
1811                 goto bail;
1812         }
1813
1814         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1815                                            dentry->d_name.len);
1816         if (status)
1817                 goto bail;
1818
1819         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1820                                               dentry->d_name.name,
1821                                               dentry->d_name.len, &lookup);
1822         if (status < 0) {
1823                 mlog_errno(status);
1824                 goto bail;
1825         }
1826
1827         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1828         if (status < 0) {
1829                 if (status != -ENOSPC)
1830                         mlog_errno(status);
1831                 goto bail;
1832         }
1833
1834         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1835         if (!inode) {
1836                 status = -ENOMEM;
1837                 mlog_errno(status);
1838                 goto bail;
1839         }
1840
1841         /* get security xattr */
1842         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1843         if (status) {
1844                 if (status == -EOPNOTSUPP)
1845                         si.enable = 0;
1846                 else {
1847                         mlog_errno(status);
1848                         goto bail;
1849                 }
1850         }
1851
1852         /* calculate meta data/clusters for setting security xattr */
1853         if (si.enable) {
1854                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1855                                                   &xattr_credits, &xattr_ac);
1856                 if (status < 0) {
1857                         mlog_errno(status);
1858                         goto bail;
1859                 }
1860         }
1861
1862         /* don't reserve bitmap space for fast symlinks. */
1863         if (l > ocfs2_fast_symlink_chars(sb))
1864                 want_clusters += 1;
1865
1866         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1867         if (status < 0) {
1868                 if (status != -ENOSPC)
1869                         mlog_errno(status);
1870                 goto bail;
1871         }
1872
1873         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1874         if (IS_ERR(handle)) {
1875                 status = PTR_ERR(handle);
1876                 handle = NULL;
1877                 mlog_errno(status);
1878                 goto bail;
1879         }
1880
1881         /* Starting to change things, restart is no longer possible. */
1882         ocfs2_block_signals(&oldset);
1883         did_block_signals = 1;
1884
1885         status = dquot_alloc_inode(inode);
1886         if (status)
1887                 goto bail;
1888         did_quota_inode = 1;
1889
1890         trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1891                                    dentry->d_name.name,
1892                                    (unsigned long long)OCFS2_I(dir)->ip_blkno,
1893                                    inode->i_mode);
1894
1895         status = ocfs2_mknod_locked(osb, dir, inode,
1896                                     0, &new_fe_bh, parent_fe_bh, handle,
1897                                     inode_ac);
1898         if (status < 0) {
1899                 mlog_errno(status);
1900                 goto bail;
1901         }
1902
1903         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1904         inode->i_rdev = 0;
1905         newsize = l - 1;
1906         inode->i_op = &ocfs2_symlink_inode_operations;
1907         if (l > ocfs2_fast_symlink_chars(sb)) {
1908                 u32 offset = 0;
1909
1910                 status = dquot_alloc_space_nodirty(inode,
1911                     ocfs2_clusters_to_bytes(osb->sb, 1));
1912                 if (status)
1913                         goto bail;
1914                 did_quota = 1;
1915                 inode->i_mapping->a_ops = &ocfs2_aops;
1916                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1917                                               new_fe_bh,
1918                                               handle, data_ac, NULL,
1919                                               NULL);
1920                 if (status < 0) {
1921                         if (status != -ENOSPC && status != -EINTR) {
1922                                 mlog(ML_ERROR,
1923                                      "Failed to extend file to %llu\n",
1924                                      (unsigned long long)newsize);
1925                                 mlog_errno(status);
1926                                 status = -ENOSPC;
1927                         }
1928                         goto bail;
1929                 }
1930                 i_size_write(inode, newsize);
1931                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1932         } else {
1933                 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1934                 memcpy((char *) fe->id2.i_symlink, symname, l);
1935                 i_size_write(inode, newsize);
1936                 inode->i_blocks = 0;
1937         }
1938
1939         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1940         if (status < 0) {
1941                 mlog_errno(status);
1942                 goto bail;
1943         }
1944
1945         if (!ocfs2_inode_is_fast_symlink(inode)) {
1946                 status = ocfs2_create_symlink_data(osb, handle, inode,
1947                                                    symname);
1948                 if (status < 0) {
1949                         mlog_errno(status);
1950                         goto bail;
1951                 }
1952         }
1953
1954         if (si.enable) {
1955                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1956                                                  xattr_ac, data_ac);
1957                 if (status < 0) {
1958                         mlog_errno(status);
1959                         goto bail;
1960                 }
1961         }
1962
1963         /*
1964          * Do this before adding the entry to the directory. We add
1965          * also set d_op after success so that ->d_iput() will cleanup
1966          * the dentry lock even if ocfs2_add_entry() fails below.
1967          */
1968         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1969         if (status) {
1970                 mlog_errno(status);
1971                 goto bail;
1972         }
1973
1974         dl = dentry->d_fsdata;
1975
1976         status = ocfs2_add_entry(handle, dentry, inode,
1977                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
1978                                  &lookup);
1979         if (status < 0) {
1980                 mlog_errno(status);
1981                 goto bail;
1982         }
1983
1984         insert_inode_hash(inode);
1985         d_instantiate(dentry, inode);
1986 bail:
1987         if (status < 0 && did_quota)
1988                 dquot_free_space_nodirty(inode,
1989                                         ocfs2_clusters_to_bytes(osb->sb, 1));
1990         if (status < 0 && did_quota_inode)
1991                 dquot_free_inode(inode);
1992         if (handle)
1993                 ocfs2_commit_trans(osb, handle);
1994
1995         ocfs2_inode_unlock(dir, 1);
1996         if (did_block_signals)
1997                 ocfs2_unblock_signals(&oldset);
1998
1999         brelse(new_fe_bh);
2000         brelse(parent_fe_bh);
2001         kfree(si.value);
2002         ocfs2_free_dir_lookup_result(&lookup);
2003         if (inode_ac)
2004                 ocfs2_free_alloc_context(inode_ac);
2005         if (data_ac)
2006                 ocfs2_free_alloc_context(data_ac);
2007         if (xattr_ac)
2008                 ocfs2_free_alloc_context(xattr_ac);
2009         if ((status < 0) && inode) {
2010                 if (dl)
2011                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2012
2013                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2014                 clear_nlink(inode);
2015                 iput(inode);
2016         }
2017
2018         if (status)
2019                 mlog_errno(status);
2020
2021         return status;
2022 }
2023
2024 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2025 {
2026         int status, namelen;
2027
2028         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2029                            (long long)blkno);
2030         if (namelen <= 0) {
2031                 if (namelen)
2032                         status = namelen;
2033                 else
2034                         status = -EINVAL;
2035                 mlog_errno(status);
2036                 goto bail;
2037         }
2038         if (namelen != OCFS2_ORPHAN_NAMELEN) {
2039                 status = -EINVAL;
2040                 mlog_errno(status);
2041                 goto bail;
2042         }
2043
2044         trace_ocfs2_blkno_stringify(blkno, name, namelen);
2045
2046         status = 0;
2047 bail:
2048         if (status < 0)
2049                 mlog_errno(status);
2050         return status;
2051 }
2052
2053 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2054                                         struct inode **ret_orphan_dir,
2055                                         struct buffer_head **ret_orphan_dir_bh)
2056 {
2057         struct inode *orphan_dir_inode;
2058         struct buffer_head *orphan_dir_bh = NULL;
2059         int ret = 0;
2060
2061         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2062                                                        ORPHAN_DIR_SYSTEM_INODE,
2063                                                        osb->slot_num);
2064         if (!orphan_dir_inode) {
2065                 ret = -ENOENT;
2066                 mlog_errno(ret);
2067                 return ret;
2068         }
2069
2070         mutex_lock(&orphan_dir_inode->i_mutex);
2071
2072         ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2073         if (ret < 0) {
2074                 mutex_unlock(&orphan_dir_inode->i_mutex);
2075                 iput(orphan_dir_inode);
2076
2077                 mlog_errno(ret);
2078                 return ret;
2079         }
2080
2081         *ret_orphan_dir = orphan_dir_inode;
2082         *ret_orphan_dir_bh = orphan_dir_bh;
2083
2084         return 0;
2085 }
2086
2087 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2088                                       struct buffer_head *orphan_dir_bh,
2089                                       u64 blkno,
2090                                       char *name,
2091                                       struct ocfs2_dir_lookup_result *lookup)
2092 {
2093         int ret;
2094         struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2095
2096         ret = ocfs2_blkno_stringify(blkno, name);
2097         if (ret < 0) {
2098                 mlog_errno(ret);
2099                 return ret;
2100         }
2101
2102         ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2103                                            orphan_dir_bh, name,
2104                                            OCFS2_ORPHAN_NAMELEN, lookup);
2105         if (ret < 0) {
2106                 mlog_errno(ret);
2107                 return ret;
2108         }
2109
2110         return 0;
2111 }
2112
2113 /**
2114  * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2115  * insertion of an orphan.
2116  * @osb: ocfs2 file system
2117  * @ret_orphan_dir: Orphan dir inode - returned locked!
2118  * @blkno: Actual block number of the inode to be inserted into orphan dir.
2119  * @lookup: dir lookup result, to be passed back into functions like
2120  *          ocfs2_orphan_add
2121  *
2122  * Returns zero on success and the ret_orphan_dir, name and lookup
2123  * fields will be populated.
2124  *
2125  * Returns non-zero on failure.
2126  */
2127 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2128                                     struct inode **ret_orphan_dir,
2129                                     u64 blkno,
2130                                     char *name,
2131                                     struct ocfs2_dir_lookup_result *lookup)
2132 {
2133         struct inode *orphan_dir_inode = NULL;
2134         struct buffer_head *orphan_dir_bh = NULL;
2135         int ret = 0;
2136
2137         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2138                                            &orphan_dir_bh);
2139         if (ret < 0) {
2140                 mlog_errno(ret);
2141                 return ret;
2142         }
2143
2144         ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2145                                          blkno, name, lookup);
2146         if (ret < 0) {
2147                 mlog_errno(ret);
2148                 goto out;
2149         }
2150
2151         *ret_orphan_dir = orphan_dir_inode;
2152
2153 out:
2154         brelse(orphan_dir_bh);
2155
2156         if (ret) {
2157                 ocfs2_inode_unlock(orphan_dir_inode, 1);
2158                 mutex_unlock(&orphan_dir_inode->i_mutex);
2159                 iput(orphan_dir_inode);
2160         }
2161
2162         if (ret)
2163                 mlog_errno(ret);
2164         return ret;
2165 }
2166
2167 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2168                             handle_t *handle,
2169                             struct inode *inode,
2170                             struct buffer_head *fe_bh,
2171                             char *name,
2172                             struct ocfs2_dir_lookup_result *lookup,
2173                             struct inode *orphan_dir_inode)
2174 {
2175         struct buffer_head *orphan_dir_bh = NULL;
2176         int status = 0;
2177         struct ocfs2_dinode *orphan_fe;
2178         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2179
2180         trace_ocfs2_orphan_add_begin(
2181                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2182
2183         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2184         if (status < 0) {
2185                 mlog_errno(status);
2186                 goto leave;
2187         }
2188
2189         status = ocfs2_journal_access_di(handle,
2190                                          INODE_CACHE(orphan_dir_inode),
2191                                          orphan_dir_bh,
2192                                          OCFS2_JOURNAL_ACCESS_WRITE);
2193         if (status < 0) {
2194                 mlog_errno(status);
2195                 goto leave;
2196         }
2197
2198         /*
2199          * We're going to journal the change of i_flags and i_orphaned_slot.
2200          * It's safe anyway, though some callers may duplicate the journaling.
2201          * Journaling within the func just make the logic look more
2202          * straightforward.
2203          */
2204         status = ocfs2_journal_access_di(handle,
2205                                          INODE_CACHE(inode),
2206                                          fe_bh,
2207                                          OCFS2_JOURNAL_ACCESS_WRITE);
2208         if (status < 0) {
2209                 mlog_errno(status);
2210                 goto leave;
2211         }
2212
2213         /* we're a cluster, and nlink can change on disk from
2214          * underneath us... */
2215         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2216         if (S_ISDIR(inode->i_mode))
2217                 ocfs2_add_links_count(orphan_fe, 1);
2218         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2219         ocfs2_journal_dirty(handle, orphan_dir_bh);
2220
2221         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2222                                    OCFS2_ORPHAN_NAMELEN, inode,
2223                                    OCFS2_I(inode)->ip_blkno,
2224                                    orphan_dir_bh, lookup);
2225         if (status < 0) {
2226                 mlog_errno(status);
2227                 goto rollback;
2228         }
2229
2230         fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2231         OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2232
2233         /* Record which orphan dir our inode now resides
2234          * in. delete_inode will use this to determine which orphan
2235          * dir to lock. */
2236         fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2237
2238         ocfs2_journal_dirty(handle, fe_bh);
2239
2240         trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2241                                    osb->slot_num);
2242
2243 rollback:
2244         if (status < 0) {
2245                 if (S_ISDIR(inode->i_mode))
2246                         ocfs2_add_links_count(orphan_fe, -1);
2247                 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2248         }
2249
2250 leave:
2251         brelse(orphan_dir_bh);
2252
2253         return status;
2254 }
2255
2256 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2257 int ocfs2_orphan_del(struct ocfs2_super *osb,
2258                      handle_t *handle,
2259                      struct inode *orphan_dir_inode,
2260                      struct inode *inode,
2261                      struct buffer_head *orphan_dir_bh)
2262 {
2263         char name[OCFS2_ORPHAN_NAMELEN + 1];
2264         struct ocfs2_dinode *orphan_fe;
2265         int status = 0;
2266         struct ocfs2_dir_lookup_result lookup = { NULL, };
2267
2268         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2269         if (status < 0) {
2270                 mlog_errno(status);
2271                 goto leave;
2272         }
2273
2274         trace_ocfs2_orphan_del(
2275              (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2276              name, OCFS2_ORPHAN_NAMELEN);
2277
2278         /* find it's spot in the orphan directory */
2279         status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
2280                                   &lookup);
2281         if (status) {
2282                 mlog_errno(status);
2283                 goto leave;
2284         }
2285
2286         /* remove it from the orphan directory */
2287         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2288         if (status < 0) {
2289                 mlog_errno(status);
2290                 goto leave;
2291         }
2292
2293         status = ocfs2_journal_access_di(handle,
2294                                          INODE_CACHE(orphan_dir_inode),
2295                                          orphan_dir_bh,
2296                                          OCFS2_JOURNAL_ACCESS_WRITE);
2297         if (status < 0) {
2298                 mlog_errno(status);
2299                 goto leave;
2300         }
2301
2302         /* do the i_nlink dance! :) */
2303         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2304         if (S_ISDIR(inode->i_mode))
2305                 ocfs2_add_links_count(orphan_fe, -1);
2306         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2307         ocfs2_journal_dirty(handle, orphan_dir_bh);
2308
2309 leave:
2310         ocfs2_free_dir_lookup_result(&lookup);
2311
2312         if (status)
2313                 mlog_errno(status);
2314         return status;
2315 }
2316
2317 /**
2318  * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2319  * allocated file. This is different from the typical 'add to orphan dir'
2320  * operation in that the inode does not yet exist. This is a problem because
2321  * the orphan dir stringifies the inode block number to come up with it's
2322  * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2323  * problem. This function works around it by calling deeper into the orphan
2324  * and suballoc code than other callers. Use this only by necessity.
2325  * @dir: The directory which this inode will ultimately wind up under - not the
2326  * orphan dir!
2327  * @dir_bh: buffer_head the @dir inode block
2328  * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2329  * with the string to be used for orphan dirent. Pass back to the orphan dir
2330  * code.
2331  * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2332  * dir code.
2333  * @ret_di_blkno: block number where the new inode will be allocated.
2334  * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2335  * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2336  *
2337  * Returns zero on success and the ret_orphan_dir, name and lookup
2338  * fields will be populated.
2339  *
2340  * Returns non-zero on failure.
2341  */
2342 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2343                                         struct buffer_head *dir_bh,
2344                                         char *orphan_name,
2345                                         struct inode **ret_orphan_dir,
2346                                         u64 *ret_di_blkno,
2347                                         struct ocfs2_dir_lookup_result *orphan_insert,
2348                                         struct ocfs2_alloc_context **ret_inode_ac)
2349 {
2350         int ret;
2351         u64 di_blkno;
2352         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2353         struct inode *orphan_dir = NULL;
2354         struct buffer_head *orphan_dir_bh = NULL;
2355         struct ocfs2_alloc_context *inode_ac = NULL;
2356
2357         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2358         if (ret < 0) {
2359                 mlog_errno(ret);
2360                 return ret;
2361         }
2362
2363         /* reserve an inode spot */
2364         ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2365         if (ret < 0) {
2366                 if (ret != -ENOSPC)
2367                         mlog_errno(ret);
2368                 goto out;
2369         }
2370
2371         ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2372                                        &di_blkno);
2373         if (ret) {
2374                 mlog_errno(ret);
2375                 goto out;
2376         }
2377
2378         ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2379                                          di_blkno, orphan_name, orphan_insert);
2380         if (ret < 0) {
2381                 mlog_errno(ret);
2382                 goto out;
2383         }
2384
2385 out:
2386         if (ret == 0) {
2387                 *ret_orphan_dir = orphan_dir;
2388                 *ret_di_blkno = di_blkno;
2389                 *ret_inode_ac = inode_ac;
2390                 /*
2391                  * orphan_name and orphan_insert are already up to
2392                  * date via prepare_orphan_dir
2393                  */
2394         } else {
2395                 /* Unroll reserve_new_inode* */
2396                 if (inode_ac)
2397                         ocfs2_free_alloc_context(inode_ac);
2398
2399                 /* Unroll orphan dir locking */
2400                 mutex_unlock(&orphan_dir->i_mutex);
2401                 ocfs2_inode_unlock(orphan_dir, 1);
2402                 iput(orphan_dir);
2403         }
2404
2405         brelse(orphan_dir_bh);
2406
2407         return ret;
2408 }
2409
2410 int ocfs2_create_inode_in_orphan(struct inode *dir,
2411                                  int mode,
2412                                  struct inode **new_inode)
2413 {
2414         int status, did_quota_inode = 0;
2415         struct inode *inode = NULL;
2416         struct inode *orphan_dir = NULL;
2417         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2418         struct ocfs2_dinode *di = NULL;
2419         handle_t *handle = NULL;
2420         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2421         struct buffer_head *parent_di_bh = NULL;
2422         struct buffer_head *new_di_bh = NULL;
2423         struct ocfs2_alloc_context *inode_ac = NULL;
2424         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2425         u64 uninitialized_var(di_blkno), suballoc_loc;
2426         u16 suballoc_bit;
2427
2428         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2429         if (status < 0) {
2430                 if (status != -ENOENT)
2431                         mlog_errno(status);
2432                 return status;
2433         }
2434
2435         status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2436                                               orphan_name, &orphan_dir,
2437                                               &di_blkno, &orphan_insert, &inode_ac);
2438         if (status < 0) {
2439                 if (status != -ENOSPC)
2440                         mlog_errno(status);
2441                 goto leave;
2442         }
2443
2444         inode = ocfs2_get_init_inode(dir, mode);
2445         if (!inode) {
2446                 status = -ENOMEM;
2447                 mlog_errno(status);
2448                 goto leave;
2449         }
2450
2451         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2452         if (IS_ERR(handle)) {
2453                 status = PTR_ERR(handle);
2454                 handle = NULL;
2455                 mlog_errno(status);
2456                 goto leave;
2457         }
2458
2459         status = dquot_alloc_inode(inode);
2460         if (status)
2461                 goto leave;
2462         did_quota_inode = 1;
2463
2464         status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2465                                               &suballoc_loc,
2466                                               &suballoc_bit, di_blkno);
2467         if (status < 0) {
2468                 mlog_errno(status);
2469                 goto leave;
2470         }
2471
2472         clear_nlink(inode);
2473         /* do the real work now. */
2474         status = __ocfs2_mknod_locked(dir, inode,
2475                                       0, &new_di_bh, parent_di_bh, handle,
2476                                       inode_ac, di_blkno, suballoc_loc,
2477                                       suballoc_bit);
2478         if (status < 0) {
2479                 mlog_errno(status);
2480                 goto leave;
2481         }
2482
2483         di = (struct ocfs2_dinode *)new_di_bh->b_data;
2484         status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2485                                   &orphan_insert, orphan_dir);
2486         if (status < 0) {
2487                 mlog_errno(status);
2488                 goto leave;
2489         }
2490
2491         /* get open lock so that only nodes can't remove it from orphan dir. */
2492         status = ocfs2_open_lock(inode);
2493         if (status < 0)
2494                 mlog_errno(status);
2495
2496         insert_inode_hash(inode);
2497 leave:
2498         if (status < 0 && did_quota_inode)
2499                 dquot_free_inode(inode);
2500         if (handle)
2501                 ocfs2_commit_trans(osb, handle);
2502
2503         if (orphan_dir) {
2504                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2505                 ocfs2_inode_unlock(orphan_dir, 1);
2506                 mutex_unlock(&orphan_dir->i_mutex);
2507                 iput(orphan_dir);
2508         }
2509
2510         if ((status < 0) && inode) {
2511                 clear_nlink(inode);
2512                 iput(inode);
2513         }
2514
2515         if (inode_ac)
2516                 ocfs2_free_alloc_context(inode_ac);
2517
2518         brelse(new_di_bh);
2519
2520         if (!status)
2521                 *new_inode = inode;
2522
2523         ocfs2_free_dir_lookup_result(&orphan_insert);
2524
2525         ocfs2_inode_unlock(dir, 1);
2526         brelse(parent_di_bh);
2527         return status;
2528 }
2529
2530 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2531                                    struct inode *inode,
2532                                    struct dentry *dentry)
2533 {
2534         int status = 0;
2535         struct buffer_head *parent_di_bh = NULL;
2536         handle_t *handle = NULL;
2537         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2538         struct ocfs2_dinode *dir_di, *di;
2539         struct inode *orphan_dir_inode = NULL;
2540         struct buffer_head *orphan_dir_bh = NULL;
2541         struct buffer_head *di_bh = NULL;
2542         struct ocfs2_dir_lookup_result lookup = { NULL, };
2543
2544         trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2545                                 dentry->d_name.len, dentry->d_name.name,
2546                                 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2547                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2548
2549         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2550         if (status < 0) {
2551                 if (status != -ENOENT)
2552                         mlog_errno(status);
2553                 return status;
2554         }
2555
2556         dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2557         if (!dir_di->i_links_count) {
2558                 /* can't make a file in a deleted directory. */
2559                 status = -ENOENT;
2560                 goto leave;
2561         }
2562
2563         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2564                                            dentry->d_name.len);
2565         if (status)
2566                 goto leave;
2567
2568         /* get a spot inside the dir. */
2569         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2570                                               dentry->d_name.name,
2571                                               dentry->d_name.len, &lookup);
2572         if (status < 0) {
2573                 mlog_errno(status);
2574                 goto leave;
2575         }
2576
2577         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2578                                                        ORPHAN_DIR_SYSTEM_INODE,
2579                                                        osb->slot_num);
2580         if (!orphan_dir_inode) {
2581                 status = -EEXIST;
2582                 mlog_errno(status);
2583                 goto leave;
2584         }
2585
2586         mutex_lock(&orphan_dir_inode->i_mutex);
2587
2588         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2589         if (status < 0) {
2590                 mlog_errno(status);
2591                 mutex_unlock(&orphan_dir_inode->i_mutex);
2592                 iput(orphan_dir_inode);
2593                 goto leave;
2594         }
2595
2596         status = ocfs2_read_inode_block(inode, &di_bh);
2597         if (status < 0) {
2598                 mlog_errno(status);
2599                 goto orphan_unlock;
2600         }
2601
2602         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2603         if (IS_ERR(handle)) {
2604                 status = PTR_ERR(handle);
2605                 handle = NULL;
2606                 mlog_errno(status);
2607                 goto orphan_unlock;
2608         }
2609
2610         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2611                                          di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2612         if (status < 0) {
2613                 mlog_errno(status);
2614                 goto out_commit;
2615         }
2616
2617         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2618                                   orphan_dir_bh);
2619         if (status < 0) {
2620                 mlog_errno(status);
2621                 goto out_commit;
2622         }
2623
2624         di = (struct ocfs2_dinode *)di_bh->b_data;
2625         di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2626         di->i_orphaned_slot = 0;
2627         set_nlink(inode, 1);
2628         ocfs2_set_links_count(di, inode->i_nlink);
2629         ocfs2_update_inode_fsync_trans(handle, inode, 1);
2630         ocfs2_journal_dirty(handle, di_bh);
2631
2632         status = ocfs2_add_entry(handle, dentry, inode,
2633                                  OCFS2_I(inode)->ip_blkno, parent_di_bh,
2634                                  &lookup);
2635         if (status < 0) {
2636                 mlog_errno(status);
2637                 goto out_commit;
2638         }
2639
2640         status = ocfs2_dentry_attach_lock(dentry, inode,
2641                                           OCFS2_I(dir)->ip_blkno);
2642         if (status) {
2643                 mlog_errno(status);
2644                 goto out_commit;
2645         }
2646
2647         d_instantiate(dentry, inode);
2648         status = 0;
2649 out_commit:
2650         ocfs2_commit_trans(osb, handle);
2651 orphan_unlock:
2652         ocfs2_inode_unlock(orphan_dir_inode, 1);
2653         mutex_unlock(&orphan_dir_inode->i_mutex);
2654         iput(orphan_dir_inode);
2655 leave:
2656
2657         ocfs2_inode_unlock(dir, 1);
2658
2659         brelse(di_bh);
2660         brelse(parent_di_bh);
2661         brelse(orphan_dir_bh);
2662
2663         ocfs2_free_dir_lookup_result(&lookup);
2664
2665         if (status)
2666                 mlog_errno(status);
2667
2668         return status;
2669 }
2670
2671 const struct inode_operations ocfs2_dir_iops = {
2672         .create         = ocfs2_create,
2673         .lookup         = ocfs2_lookup,
2674         .link           = ocfs2_link,
2675         .unlink         = ocfs2_unlink,
2676         .rmdir          = ocfs2_unlink,
2677         .symlink        = ocfs2_symlink,
2678         .mkdir          = ocfs2_mkdir,
2679         .mknod          = ocfs2_mknod,
2680         .rename         = ocfs2_rename,
2681         .setattr        = ocfs2_setattr,
2682         .getattr        = ocfs2_getattr,
2683         .permission     = ocfs2_permission,
2684         .setxattr       = generic_setxattr,
2685         .getxattr       = generic_getxattr,
2686         .listxattr      = ocfs2_listxattr,
2687         .removexattr    = generic_removexattr,
2688         .fiemap         = ocfs2_fiemap,
2689         .get_acl        = ocfs2_iop_get_acl,
2690         .set_acl        = ocfs2_iop_set_acl,
2691 };