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 (card@masi.ibp.fr)
  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 #define MLOG_MASK_PREFIX ML_NAMEI
  46 #include <cluster/masklog.h>
  47
  48 #include "ocfs2.h"
  49
  50 #include "alloc.h"
  51 #include "dcache.h"
  52 #include "dir.h"
  53 #include "dlmglue.h"
  54 #include "extent_map.h"
  55 #include "file.h"
  56 #include "inode.h"
  57 #include "journal.h"
  58 #include "namei.h"
  59 #include "suballoc.h"
  60 #include "super.h"
  61 #include "symlink.h"
  62 #include "sysfile.h"
  63 #include "uptodate.h"
  64 #include "xattr.h"
  65 #include "acl.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                               struct dentry *dentry,
  73                               dev_t dev,
  74                               struct buffer_head **new_fe_bh,
  75                               struct buffer_head *parent_fe_bh,
  76                               handle_t *handle,
  77                               struct ocfs2_alloc_context *inode_ac);
  78
  79 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
  80                                     struct inode **ret_orphan_dir,
  81                                     struct inode *inode,
  82                                     char *name,
  83                                     struct ocfs2_dir_lookup_result *lookup);
  84
  85 static int ocfs2_orphan_add(struct ocfs2_super *osb,
  86                             handle_t *handle,
  87                             struct inode *inode,
  88                             struct ocfs2_dinode *fe,
  89                             char *name,
  90                             struct ocfs2_dir_lookup_result *lookup,
  91                             struct inode *orphan_dir_inode);
  92
  93 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
  94                                      handle_t *handle,
  95                                      struct inode *inode,
  96                                      const char *symname);
  97
  98 /* An orphan dir name is an 8 byte value, printed as a hex string */
  99 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
 100
 101 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
 102                                    struct nameidata *nd)
 103 {
 104         int status;
 105         u64 blkno;
 106         struct inode *inode = NULL;
 107         struct dentry *ret;
 108         struct ocfs2_inode_info *oi;
 109
 110         mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
 111                    dentry->d_name.len, dentry->d_name.name);
 112
 113         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
 114                 ret = ERR_PTR(-ENAMETOOLONG);
 115                 goto bail;
 116         }
 117
 118         mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len,
 119              dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno);
 120
 121         status = ocfs2_inode_lock(dir, NULL, 0);
 122         if (status < 0) {
 123                 if (status != -ENOENT)
 124                         mlog_errno(status);
 125                 ret = ERR_PTR(status);
 126                 goto bail;
 127         }
 128
 129         status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
 130                                             dentry->d_name.len, &blkno);
 131         if (status < 0)
 132                 goto bail_add;
 133
 134         inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
 135         if (IS_ERR(inode)) {
 136                 ret = ERR_PTR(-EACCES);
 137                 goto bail_unlock;
 138         }
 139
 140         oi = OCFS2_I(inode);
 141         /* Clear any orphaned state... If we were able to look up the
 142          * inode from a directory, it certainly can't be orphaned. We
 143          * might have the bad state from a node which intended to
 144          * orphan this inode but crashed before it could commit the
 145          * unlink. */
 146         spin_lock(&oi->ip_lock);
 147         oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
 148         spin_unlock(&oi->ip_lock);
 149
 150 bail_add:
 151         dentry->d_op = &ocfs2_dentry_ops;
 152         ret = d_splice_alias(inode, dentry);
 153
 154         if (inode) {
 155                 /*
 156                  * If d_splice_alias() finds a DCACHE_DISCONNECTED
 157                  * dentry, it will d_move() it on top of ourse. The
 158                  * return value will indicate this however, so in
 159                  * those cases, we switch them around for the locking
 160                  * code.
 161                  *
 162                  * NOTE: This dentry already has ->d_op set from
 163                  * ocfs2_get_parent() and ocfs2_get_dentry()
 164                  */
 165                 if (ret)
 166                         dentry = ret;
 167
 168                 status = ocfs2_dentry_attach_lock(dentry, inode,
 169                                                   OCFS2_I(dir)->ip_blkno);
 170                 if (status) {
 171                         mlog_errno(status);
 172                         ret = ERR_PTR(status);
 173                         goto bail_unlock;
 174                 }
 175         }
 176
 177 bail_unlock:
 178         /* Don't drop the cluster lock until *after* the d_add --
 179          * unlink on another node will message us to remove that
 180          * dentry under this lock so otherwise we can race this with
 181          * the downconvert thread and have a stale dentry. */
 182         ocfs2_inode_unlock(dir, 0);
 183
 184 bail:
 185
 186         mlog_exit_ptr(ret);
 187
 188         return ret;
 189 }
 190
 191 static struct inode *ocfs2_get_init_inode(struct inode *dir, int mode)
 192 {
 193         struct inode *inode;
 194
 195         inode = new_inode(dir->i_sb);
 196         if (!inode) {
 197                 mlog(ML_ERROR, "new_inode failed!\n");
 198                 return NULL;
 199         }
 200
 201         /* populate as many fields early on as possible - many of
 202          * these are used by the support functions here and in
 203          * callers. */
 204         if (S_ISDIR(mode))
 205                 inode->i_nlink = 2;
 206         else
 207                 inode->i_nlink = 1;
 208         inode->i_uid = current_fsuid();
 209         if (dir->i_mode & S_ISGID) {
 210                 inode->i_gid = dir->i_gid;
 211                 if (S_ISDIR(mode))
 212                         mode |= S_ISGID;
 213         } else
 214                 inode->i_gid = current_fsgid();
 215         inode->i_mode = mode;
 216         vfs_dq_init(inode);
 217         return inode;
 218 }
 219
 220 static int ocfs2_mknod(struct inode *dir,
 221                        struct dentry *dentry,
 222                        int mode,
 223                        dev_t dev)
 224 {
 225         int status = 0;
 226         struct buffer_head *parent_fe_bh = NULL;
 227         handle_t *handle = NULL;
 228         struct ocfs2_super *osb;
 229         struct ocfs2_dinode *dirfe;
 230         struct buffer_head *new_fe_bh = NULL;
 231         struct inode *inode = NULL;
 232         struct ocfs2_alloc_context *inode_ac = NULL;
 233         struct ocfs2_alloc_context *data_ac = NULL;
 234         struct ocfs2_alloc_context *meta_ac = NULL;
 235         int want_clusters = 0;
 236         int want_meta = 0;
 237         int xattr_credits = 0;
 238         struct ocfs2_security_xattr_info si = {
 239                 .enable = 1,
 240         };
 241         int did_quota_inode = 0;
 242         struct ocfs2_dir_lookup_result lookup = { NULL, };
 243
 244         mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
 245                    (unsigned long)dev, dentry->d_name.len,
 246                    dentry->d_name.name);
 247
 248         /* get our super block */
 249         osb = OCFS2_SB(dir->i_sb);
 250
 251         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
 252         if (status < 0) {
 253                 if (status != -ENOENT)
 254                         mlog_errno(status);
 255                 return status;
 256         }
 257
 258         if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
 259                 status = -EMLINK;
 260                 goto leave;
 261         }
 262
 263         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
 264         if (!ocfs2_read_links_count(dirfe)) {
 265                 /* can't make a file in a deleted directory. */
 266                 status = -ENOENT;
 267                 goto leave;
 268         }
 269
 270         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 271                                            dentry->d_name.len);
 272         if (status)
 273                 goto leave;
 274
 275         /* get a spot inside the dir. */
 276         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 277                                               dentry->d_name.name,
 278                                               dentry->d_name.len, &lookup);
 279         if (status < 0) {
 280                 mlog_errno(status);
 281                 goto leave;
 282         }
 283
 284         /* reserve an inode spot */
 285         status = ocfs2_reserve_new_inode(osb, &inode_ac);
 286         if (status < 0) {
 287                 if (status != -ENOSPC)
 288                         mlog_errno(status);
 289                 goto leave;
 290         }
 291
 292         inode = ocfs2_get_init_inode(dir, mode);
 293         if (!inode) {
 294                 status = -ENOMEM;
 295                 mlog_errno(status);
 296                 goto leave;
 297         }
 298
 299         /* get security xattr */
 300         status = ocfs2_init_security_get(inode, dir, &si);
 301         if (status) {
 302                 if (status == -EOPNOTSUPP)
 303                         si.enable = 0;
 304                 else {
 305                         mlog_errno(status);
 306                         goto leave;
 307                 }
 308         }
 309
 310         /* calculate meta data/clusters for setting security and acl xattr */
 311         status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
 312                                        &si, &want_clusters,
 313                                        &xattr_credits, &want_meta);
 314         if (status < 0) {
 315                 mlog_errno(status);
 316                 goto leave;
 317         }
 318
 319         /* Reserve a cluster if creating an extent based directory. */
 320         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
 321                 want_clusters += 1;
 322
 323                 /* Dir indexing requires extra space as well */
 324                 if (ocfs2_supports_indexed_dirs(osb))
 325                         want_meta++;
 326         }
 327
 328         status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
 329         if (status < 0) {
 330                 if (status != -ENOSPC)
 331                         mlog_errno(status);
 332                 goto leave;
 333         }
 334
 335         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
 336         if (status < 0) {
 337                 if (status != -ENOSPC)
 338                         mlog_errno(status);
 339                 goto leave;
 340         }
 341
 342         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
 343                                                             S_ISDIR(mode),
 344                                                             xattr_credits));
 345         if (IS_ERR(handle)) {
 346                 status = PTR_ERR(handle);
 347                 handle = NULL;
 348                 mlog_errno(status);
 349                 goto leave;
 350         }
 351
 352         /* We don't use standard VFS wrapper because we don't want vfs_dq_init
 353          * to be called. */
 354         if (sb_any_quota_active(osb->sb) &&
 355             osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
 356                 status = -EDQUOT;
 357                 goto leave;
 358         }
 359         did_quota_inode = 1;
 360
 361         /* do the real work now. */
 362         status = ocfs2_mknod_locked(osb, dir, inode, dentry, dev,
 363                                     &new_fe_bh, parent_fe_bh, handle,
 364                                     inode_ac);
 365         if (status < 0) {
 366                 mlog_errno(status);
 367                 goto leave;
 368         }
 369
 370         if (S_ISDIR(mode)) {
 371                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
 372                                             new_fe_bh, data_ac, meta_ac);
 373                 if (status < 0) {
 374                         mlog_errno(status);
 375                         goto leave;
 376                 }
 377
 378                 status = ocfs2_journal_access_di(handle, dir, parent_fe_bh,
 379                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 380                 if (status < 0) {
 381                         mlog_errno(status);
 382                         goto leave;
 383                 }
 384                 ocfs2_add_links_count(dirfe, 1);
 385                 status = ocfs2_journal_dirty(handle, parent_fe_bh);
 386                 if (status < 0) {
 387                         mlog_errno(status);
 388                         goto leave;
 389                 }
 390                 inc_nlink(dir);
 391         }
 392
 393         status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
 394                                 meta_ac, data_ac);
 395         if (status < 0) {
 396                 mlog_errno(status);
 397                 goto leave;
 398         }
 399
 400         if (si.enable) {
 401                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
 402                                                  meta_ac, data_ac);
 403                 if (status < 0) {
 404                         mlog_errno(status);
 405                         goto leave;
 406                 }
 407         }
 408
 409         status = ocfs2_add_entry(handle, dentry, inode,
 410                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
 411                                  &lookup);
 412         if (status < 0) {
 413                 mlog_errno(status);
 414                 goto leave;
 415         }
 416
 417         status = ocfs2_dentry_attach_lock(dentry, inode,
 418                                           OCFS2_I(dir)->ip_blkno);
 419         if (status) {
 420                 mlog_errno(status);
 421                 goto leave;
 422         }
 423
 424         insert_inode_hash(inode);
 425         dentry->d_op = &ocfs2_dentry_ops;
 426         d_instantiate(dentry, inode);
 427         status = 0;
 428 leave:
 429         if (status < 0 && did_quota_inode)
 430                 vfs_dq_free_inode(inode);
 431         if (handle)
 432                 ocfs2_commit_trans(osb, handle);
 433
 434         ocfs2_inode_unlock(dir, 1);
 435
 436         if (status == -ENOSPC)
 437                 mlog(0, "Disk is full\n");
 438
 439         brelse(new_fe_bh);
 440         brelse(parent_fe_bh);
 441         kfree(si.name);
 442         kfree(si.value);
 443
 444         ocfs2_free_dir_lookup_result(&lookup);
 445
 446         if ((status < 0) && inode) {
 447                 clear_nlink(inode);
 448                 iput(inode);
 449         }
 450
 451         if (inode_ac)
 452                 ocfs2_free_alloc_context(inode_ac);
 453
 454         if (data_ac)
 455                 ocfs2_free_alloc_context(data_ac);
 456
 457         if (meta_ac)
 458                 ocfs2_free_alloc_context(meta_ac);
 459
 460         mlog_exit(status);
 461
 462         return status;
 463 }
 464
 465 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 466                               struct inode *dir,
 467                               struct inode *inode,
 468                               struct dentry *dentry,
 469                               dev_t dev,
 470                               struct buffer_head **new_fe_bh,
 471                               struct buffer_head *parent_fe_bh,
 472                               handle_t *handle,
 473                               struct ocfs2_alloc_context *inode_ac)
 474 {
 475         int status = 0;
 476         struct ocfs2_dinode *fe = NULL;
 477         struct ocfs2_extent_list *fel;
 478         u64 fe_blkno = 0;
 479         u16 suballoc_bit;
 480         u16 feat;
 481
 482         mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry,
 483                    inode->i_mode, (unsigned long)dev, dentry->d_name.len,
 484                    dentry->d_name.name);
 485
 486         *new_fe_bh = NULL;
 487
 488         status = ocfs2_claim_new_inode(osb, handle, dir, parent_fe_bh,
 489                                        inode_ac, &suballoc_bit, &fe_blkno);
 490         if (status < 0) {
 491                 mlog_errno(status);
 492                 goto leave;
 493         }
 494
 495         /* populate as many fields early on as possible - many of
 496          * these are used by the support functions here and in
 497          * callers. */
 498         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
 499         OCFS2_I(inode)->ip_blkno = fe_blkno;
 500         spin_lock(&osb->osb_lock);
 501         inode->i_generation = osb->s_next_generation++;
 502         spin_unlock(&osb->osb_lock);
 503
 504         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
 505         if (!*new_fe_bh) {
 506                 status = -EIO;
 507                 mlog_errno(status);
 508                 goto leave;
 509         }
 510         ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh);
 511
 512         status = ocfs2_journal_access_di(handle, inode, *new_fe_bh,
 513                                          OCFS2_JOURNAL_ACCESS_CREATE);
 514         if (status < 0) {
 515                 mlog_errno(status);
 516                 goto leave;
 517         }
 518
 519         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
 520         memset(fe, 0, osb->sb->s_blocksize);
 521
 522         fe->i_generation = cpu_to_le32(inode->i_generation);
 523         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
 524         fe->i_blkno = cpu_to_le64(fe_blkno);
 525         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
 526         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
 527         fe->i_uid = cpu_to_le32(inode->i_uid);
 528         fe->i_gid = cpu_to_le32(inode->i_gid);
 529         fe->i_mode = cpu_to_le16(inode->i_mode);
 530         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 531                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
 532
 533         ocfs2_set_links_count(fe, inode->i_nlink);
 534
 535         fe->i_last_eb_blk = 0;
 536         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 537         le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
 538         fe->i_atime = fe->i_ctime = fe->i_mtime =
 539                 cpu_to_le64(CURRENT_TIME.tv_sec);
 540         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
 541                 cpu_to_le32(CURRENT_TIME.tv_nsec);
 542         fe->i_dtime = 0;
 543
 544         /*
 545          * If supported, directories start with inline data. If inline
 546          * isn't supported, but indexing is, we start them as indexed.
 547          */
 548         feat = le16_to_cpu(fe->i_dyn_features);
 549         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
 550                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
 551
 552                 fe->id2.i_data.id_count = cpu_to_le16(
 553                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
 554         } else {
 555                 fel = &fe->id2.i_list;
 556                 fel->l_tree_depth = 0;
 557                 fel->l_next_free_rec = 0;
 558                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
 559         }
 560
 561         status = ocfs2_journal_dirty(handle, *new_fe_bh);
 562         if (status < 0) {
 563                 mlog_errno(status);
 564                 goto leave;
 565         }
 566
 567         ocfs2_populate_inode(inode, fe, 1);
 568         ocfs2_inode_set_new(osb, inode);
 569         if (!ocfs2_mount_local(osb)) {
 570                 status = ocfs2_create_new_inode_locks(inode);
 571                 if (status < 0)
 572                         mlog_errno(status);
 573         }
 574
 575         status = 0; /* error in ocfs2_create_new_inode_locks is not
 576                      * critical */
 577
 578 leave:
 579         if (status < 0) {
 580                 if (*new_fe_bh) {
 581                         brelse(*new_fe_bh);
 582                         *new_fe_bh = NULL;
 583                 }
 584         }
 585
 586         mlog_exit(status);
 587         return status;
 588 }
 589
 590 static int ocfs2_mkdir(struct inode *dir,
 591                        struct dentry *dentry,
 592                        int mode)
 593 {
 594         int ret;
 595
 596         mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
 597                    dentry->d_name.len, dentry->d_name.name);
 598         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
 599         mlog_exit(ret);
 600
 601         return ret;
 602 }
 603
 604 static int ocfs2_create(struct inode *dir,
 605                         struct dentry *dentry,
 606                         int mode,
 607                         struct nameidata *nd)
 608 {
 609         int ret;
 610
 611         mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
 612                    dentry->d_name.len, dentry->d_name.name);
 613         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
 614         mlog_exit(ret);
 615
 616         return ret;
 617 }
 618
 619 static int ocfs2_link(struct dentry *old_dentry,
 620                       struct inode *dir,
 621                       struct dentry *dentry)
 622 {
 623         handle_t *handle;
 624         struct inode *inode = old_dentry->d_inode;
 625         int err;
 626         struct buffer_head *fe_bh = NULL;
 627         struct buffer_head *parent_fe_bh = NULL;
 628         struct ocfs2_dinode *fe = NULL;
 629         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 630         struct ocfs2_dir_lookup_result lookup = { NULL, };
 631
 632         mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
 633                    old_dentry->d_name.len, old_dentry->d_name.name,
 634                    dentry->d_name.len, dentry->d_name.name);
 635
 636         if (S_ISDIR(inode->i_mode))
 637                 return -EPERM;
 638
 639         err = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
 640         if (err < 0) {
 641                 if (err != -ENOENT)
 642                         mlog_errno(err);
 643                 return err;
 644         }
 645
 646         if (!dir->i_nlink) {
 647                 err = -ENOENT;
 648                 goto out;
 649         }
 650
 651         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 652                                         dentry->d_name.len);
 653         if (err)
 654                 goto out;
 655
 656         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 657                                            dentry->d_name.name,
 658                                            dentry->d_name.len, &lookup);
 659         if (err < 0) {
 660                 mlog_errno(err);
 661                 goto out;
 662         }
 663
 664         err = ocfs2_inode_lock(inode, &fe_bh, 1);
 665         if (err < 0) {
 666                 if (err != -ENOENT)
 667                         mlog_errno(err);
 668                 goto out;
 669         }
 670
 671         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 672         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
 673                 err = -EMLINK;
 674                 goto out_unlock_inode;
 675         }
 676
 677         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
 678         if (IS_ERR(handle)) {
 679                 err = PTR_ERR(handle);
 680                 handle = NULL;
 681                 mlog_errno(err);
 682                 goto out_unlock_inode;
 683         }
 684
 685         err = ocfs2_journal_access_di(handle, inode, fe_bh,
 686                                       OCFS2_JOURNAL_ACCESS_WRITE);
 687         if (err < 0) {
 688                 mlog_errno(err);
 689                 goto out_commit;
 690         }
 691
 692         inc_nlink(inode);
 693         inode->i_ctime = CURRENT_TIME;
 694         ocfs2_set_links_count(fe, inode->i_nlink);
 695         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 696         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 697
 698         err = ocfs2_journal_dirty(handle, fe_bh);
 699         if (err < 0) {
 700                 ocfs2_add_links_count(fe, -1);
 701                 drop_nlink(inode);
 702                 mlog_errno(err);
 703                 goto out_commit;
 704         }
 705
 706         err = ocfs2_add_entry(handle, dentry, inode,
 707                               OCFS2_I(inode)->ip_blkno,
 708                               parent_fe_bh, &lookup);
 709         if (err) {
 710                 ocfs2_add_links_count(fe, -1);
 711                 drop_nlink(inode);
 712                 mlog_errno(err);
 713                 goto out_commit;
 714         }
 715
 716         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
 717         if (err) {
 718                 mlog_errno(err);
 719                 goto out_commit;
 720         }
 721
 722         atomic_inc(&inode->i_count);
 723         dentry->d_op = &ocfs2_dentry_ops;
 724         d_instantiate(dentry, inode);
 725
 726 out_commit:
 727         ocfs2_commit_trans(osb, handle);
 728 out_unlock_inode:
 729         ocfs2_inode_unlock(inode, 1);
 730
 731 out:
 732         ocfs2_inode_unlock(dir, 1);
 733
 734         brelse(fe_bh);
 735         brelse(parent_fe_bh);
 736
 737         ocfs2_free_dir_lookup_result(&lookup);
 738
 739         mlog_exit(err);
 740
 741         return err;
 742 }
 743
 744 /*
 745  * Takes and drops an exclusive lock on the given dentry. This will
 746  * force other nodes to drop it.
 747  */
 748 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 749 {
 750         int ret;
 751
 752         ret = ocfs2_dentry_lock(dentry, 1);
 753         if (ret)
 754                 mlog_errno(ret);
 755         else
 756                 ocfs2_dentry_unlock(dentry, 1);
 757
 758         return ret;
 759 }
 760
 761 static inline int inode_is_unlinkable(struct inode *inode)
 762 {
 763         if (S_ISDIR(inode->i_mode)) {
 764                 if (inode->i_nlink == 2)
 765                         return 1;
 766                 return 0;
 767         }
 768
 769         if (inode->i_nlink == 1)
 770                 return 1;
 771         return 0;
 772 }
 773
 774 static int ocfs2_unlink(struct inode *dir,
 775                         struct dentry *dentry)
 776 {
 777         int status;
 778         int child_locked = 0;
 779         struct inode *inode = dentry->d_inode;
 780         struct inode *orphan_dir = NULL;
 781         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 782         u64 blkno;
 783         struct ocfs2_dinode *fe = NULL;
 784         struct buffer_head *fe_bh = NULL;
 785         struct buffer_head *parent_node_bh = NULL;
 786         handle_t *handle = NULL;
 787         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 788         struct ocfs2_dir_lookup_result lookup = { NULL, };
 789         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
 790
 791         mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
 792                    dentry->d_name.len, dentry->d_name.name);
 793
 794         BUG_ON(dentry->d_parent->d_inode != dir);
 795
 796         mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);
 797
 798         if (inode == osb->root_inode) {
 799                 mlog(0, "Cannot delete the root directory\n");
 800                 return -EPERM;
 801         }
 802
 803         status = ocfs2_inode_lock(dir, &parent_node_bh, 1);
 804         if (status < 0) {
 805                 if (status != -ENOENT)
 806                         mlog_errno(status);
 807                 return status;
 808         }
 809
 810         status = ocfs2_find_files_on_disk(dentry->d_name.name,
 811                                           dentry->d_name.len, &blkno, dir,
 812                                           &lookup);
 813         if (status < 0) {
 814                 if (status != -ENOENT)
 815                         mlog_errno(status);
 816                 goto leave;
 817         }
 818
 819         if (OCFS2_I(inode)->ip_blkno != blkno) {
 820                 status = -ENOENT;
 821
 822                 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
 823                      (unsigned long long)OCFS2_I(inode)->ip_blkno,
 824                      (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
 825                 goto leave;
 826         }
 827
 828         status = ocfs2_inode_lock(inode, &fe_bh, 1);
 829         if (status < 0) {
 830                 if (status != -ENOENT)
 831                         mlog_errno(status);
 832                 goto leave;
 833         }
 834         child_locked = 1;
 835
 836         if (S_ISDIR(inode->i_mode)) {
 837                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
 838                         status = -ENOTEMPTY;
 839                         goto leave;
 840                 }
 841         }
 842
 843         status = ocfs2_remote_dentry_delete(dentry);
 844         if (status < 0) {
 845                 /* This remote delete should succeed under all normal
 846                  * circumstances. */
 847                 mlog_errno(status);
 848                 goto leave;
 849         }
 850
 851         if (inode_is_unlinkable(inode)) {
 852                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, inode,
 853                                                   orphan_name, &orphan_insert);
 854                 if (status < 0) {
 855                         mlog_errno(status);
 856                         goto leave;
 857                 }
 858         }
 859
 860         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
 861         if (IS_ERR(handle)) {
 862                 status = PTR_ERR(handle);
 863                 handle = NULL;
 864                 mlog_errno(status);
 865                 goto leave;
 866         }
 867
 868         status = ocfs2_journal_access_di(handle, inode, fe_bh,
 869                                          OCFS2_JOURNAL_ACCESS_WRITE);
 870         if (status < 0) {
 871                 mlog_errno(status);
 872                 goto leave;
 873         }
 874
 875         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 876
 877         if (inode_is_unlinkable(inode)) {
 878                 status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name,
 879                                           &orphan_insert, orphan_dir);
 880                 if (status < 0) {
 881                         mlog_errno(status);
 882                         goto leave;
 883                 }
 884         }
 885
 886         /* delete the name from the parent dir */
 887         status = ocfs2_delete_entry(handle, dir, &lookup);
 888         if (status < 0) {
 889                 mlog_errno(status);
 890                 goto leave;
 891         }
 892
 893         if (S_ISDIR(inode->i_mode))
 894                 drop_nlink(inode);
 895         drop_nlink(inode);
 896         ocfs2_set_links_count(fe, inode->i_nlink);
 897
 898         status = ocfs2_journal_dirty(handle, fe_bh);
 899         if (status < 0) {
 900                 mlog_errno(status);
 901                 goto leave;
 902         }
 903
 904         dir->i_ctime = dir->i_mtime = CURRENT_TIME;
 905         if (S_ISDIR(inode->i_mode))
 906                 drop_nlink(dir);
 907
 908         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
 909         if (status < 0) {
 910                 mlog_errno(status);
 911                 if (S_ISDIR(inode->i_mode))
 912                         inc_nlink(dir);
 913         }
 914
 915 leave:
 916         if (handle)
 917                 ocfs2_commit_trans(osb, handle);
 918
 919         if (child_locked)
 920                 ocfs2_inode_unlock(inode, 1);
 921
 922         ocfs2_inode_unlock(dir, 1);
 923
 924         if (orphan_dir) {
 925                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
 926                 ocfs2_inode_unlock(orphan_dir, 1);
 927                 mutex_unlock(&orphan_dir->i_mutex);
 928                 iput(orphan_dir);
 929         }
 930
 931         brelse(fe_bh);
 932         brelse(parent_node_bh);
 933
 934         ocfs2_free_dir_lookup_result(&orphan_insert);
 935         ocfs2_free_dir_lookup_result(&lookup);
 936
 937         mlog_exit(status);
 938
 939         return status;
 940 }
 941
 942 /*
 943  * The only place this should be used is rename!
 944  * if they have the same id, then the 1st one is the only one locked.
 945  */
 946 static int ocfs2_double_lock(struct ocfs2_super *osb,
 947                              struct buffer_head **bh1,
 948                              struct inode *inode1,
 949                              struct buffer_head **bh2,
 950                              struct inode *inode2)
 951 {
 952         int status;
 953         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
 954         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
 955         struct buffer_head **tmpbh;
 956         struct inode *tmpinode;
 957
 958         mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
 959                    (unsigned long long)oi1->ip_blkno,
 960                    (unsigned long long)oi2->ip_blkno);
 961
 962         if (*bh1)
 963                 *bh1 = NULL;
 964         if (*bh2)
 965                 *bh2 = NULL;
 966
 967         /* we always want to lock the one with the lower lockid first. */
 968         if (oi1->ip_blkno != oi2->ip_blkno) {
 969                 if (oi1->ip_blkno < oi2->ip_blkno) {
 970                         /* switch id1 and id2 around */
 971                         mlog(0, "switching them around...\n");
 972                         tmpbh = bh2;
 973                         bh2 = bh1;
 974                         bh1 = tmpbh;
 975
 976                         tmpinode = inode2;
 977                         inode2 = inode1;
 978                         inode1 = tmpinode;
 979                 }
 980                 /* lock id2 */
 981                 status = ocfs2_inode_lock(inode2, bh2, 1);
 982                 if (status < 0) {
 983                         if (status != -ENOENT)
 984                                 mlog_errno(status);
 985                         goto bail;
 986                 }
 987         }
 988
 989         /* lock id1 */
 990         status = ocfs2_inode_lock(inode1, bh1, 1);
 991         if (status < 0) {
 992                 /*
 993                  * An error return must mean that no cluster locks
 994                  * were held on function exit.
 995                  */
 996                 if (oi1->ip_blkno != oi2->ip_blkno)
 997                         ocfs2_inode_unlock(inode2, 1);
 998
 999                 if (status != -ENOENT)
1000                         mlog_errno(status);
1001         }
1002
1003 bail:
1004         mlog_exit(status);
1005         return status;
1006 }
1007
1008 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1009 {
1010         ocfs2_inode_unlock(inode1, 1);
1011
1012         if (inode1 != inode2)
1013                 ocfs2_inode_unlock(inode2, 1);
1014 }
1015
1016 static int ocfs2_rename(struct inode *old_dir,
1017                         struct dentry *old_dentry,
1018                         struct inode *new_dir,
1019                         struct dentry *new_dentry)
1020 {
1021         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1022         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1023         struct inode *old_inode = old_dentry->d_inode;
1024         struct inode *new_inode = new_dentry->d_inode;
1025         struct inode *orphan_dir = NULL;
1026         struct ocfs2_dinode *newfe = NULL;
1027         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1028         struct buffer_head *newfe_bh = NULL;
1029         struct buffer_head *old_inode_bh = NULL;
1030         struct ocfs2_super *osb = NULL;
1031         u64 newfe_blkno, old_de_ino;
1032         handle_t *handle = NULL;
1033         struct buffer_head *old_dir_bh = NULL;
1034         struct buffer_head *new_dir_bh = NULL;
1035         nlink_t old_dir_nlink = old_dir->i_nlink;
1036         struct ocfs2_dinode *old_di;
1037         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1038         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1039         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1040         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1041         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1042
1043         /* At some point it might be nice to break this function up a
1044          * bit. */
1045
1046         mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
1047                    old_dir, old_dentry, new_dir, new_dentry,
1048                    old_dentry->d_name.len, old_dentry->d_name.name,
1049                    new_dentry->d_name.len, new_dentry->d_name.name);
1050
1051         osb = OCFS2_SB(old_dir->i_sb);
1052
1053         if (new_inode) {
1054                 if (!igrab(new_inode))
1055                         BUG();
1056         }
1057
1058         /* Assume a directory hierarchy thusly:
1059          * a/b/c
1060          * a/d
1061          * a,b,c, and d are all directories.
1062          *
1063          * from cwd of 'a' on both nodes:
1064          * node1: mv b/c d
1065          * node2: mv d   b/c
1066          *
1067          * And that's why, just like the VFS, we need a file system
1068          * rename lock. */
1069         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1070                 status = ocfs2_rename_lock(osb);
1071                 if (status < 0) {
1072                         mlog_errno(status);
1073                         goto bail;
1074                 }
1075                 rename_lock = 1;
1076         }
1077
1078         /* if old and new are the same, this'll just do one lock. */
1079         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1080                                    &new_dir_bh, new_dir);
1081         if (status < 0) {
1082                 mlog_errno(status);
1083                 goto bail;
1084         }
1085         parents_locked = 1;
1086
1087         /* make sure both dirs have bhs
1088          * get an extra ref on old_dir_bh if old==new */
1089         if (!new_dir_bh) {
1090                 if (old_dir_bh) {
1091                         new_dir_bh = old_dir_bh;
1092                         get_bh(new_dir_bh);
1093                 } else {
1094                         mlog(ML_ERROR, "no old_dir_bh!\n");
1095                         status = -EIO;
1096                         goto bail;
1097                 }
1098         }
1099
1100         /*
1101          * Aside from allowing a meta data update, the locking here
1102          * also ensures that the downconvert thread on other nodes
1103          * won't have to concurrently downconvert the inode and the
1104          * dentry locks.
1105          */
1106         status = ocfs2_inode_lock(old_inode, &old_inode_bh, 1);
1107         if (status < 0) {
1108                 if (status != -ENOENT)
1109                         mlog_errno(status);
1110                 goto bail;
1111         }
1112         old_child_locked = 1;
1113
1114         status = ocfs2_remote_dentry_delete(old_dentry);
1115         if (status < 0) {
1116                 mlog_errno(status);
1117                 goto bail;
1118         }
1119
1120         if (S_ISDIR(old_inode->i_mode)) {
1121                 u64 old_inode_parent;
1122
1123                 update_dot_dot = 1;
1124                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1125                                                   old_inode,
1126                                                   &old_inode_dot_dot_res);
1127                 if (status) {
1128                         status = -EIO;
1129                         goto bail;
1130                 }
1131
1132                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1133                         status = -EIO;
1134                         goto bail;
1135                 }
1136
1137                 if (!new_inode && new_dir != old_dir &&
1138                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1139                         status = -EMLINK;
1140                         goto bail;
1141                 }
1142         }
1143
1144         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1145                                             old_dentry->d_name.len,
1146                                             &old_de_ino);
1147         if (status) {
1148                 status = -ENOENT;
1149                 goto bail;
1150         }
1151
1152         /*
1153          *  Check for inode number is _not_ due to possible IO errors.
1154          *  We might rmdir the source, keep it as pwd of some process
1155          *  and merrily kill the link to whatever was created under the
1156          *  same name. Goodbye sticky bit ;-<
1157          */
1158         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1159                 status = -ENOENT;
1160                 goto bail;
1161         }
1162
1163         /* check if the target already exists (in which case we need
1164          * to delete it */
1165         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1166                                           new_dentry->d_name.len,
1167                                           &newfe_blkno, new_dir,
1168                                           &target_lookup_res);
1169         /* The only error we allow here is -ENOENT because the new
1170          * file not existing is perfectly valid. */
1171         if ((status < 0) && (status != -ENOENT)) {
1172                 /* If we cannot find the file specified we should just */
1173                 /* return the error... */
1174                 mlog_errno(status);
1175                 goto bail;
1176         }
1177         if (status == 0)
1178                 target_exists = 1;
1179
1180         if (!target_exists && new_inode) {
1181                 /*
1182                  * Target was unlinked by another node while we were
1183                  * waiting to get to ocfs2_rename(). There isn't
1184                  * anything we can do here to help the situation, so
1185                  * bubble up the appropriate error.
1186                  */
1187                 status = -ENOENT;
1188                 goto bail;
1189         }
1190
1191         /* In case we need to overwrite an existing file, we blow it
1192          * away first */
1193         if (target_exists) {
1194                 /* VFS didn't think there existed an inode here, but
1195                  * someone else in the cluster must have raced our
1196                  * rename to create one. Today we error cleanly, in
1197                  * the future we should consider calling iget to build
1198                  * a new struct inode for this entry. */
1199                 if (!new_inode) {
1200                         status = -EACCES;
1201
1202                         mlog(0, "We found an inode for name %.*s but VFS "
1203                              "didn't give us one.\n", new_dentry->d_name.len,
1204                              new_dentry->d_name.name);
1205                         goto bail;
1206                 }
1207
1208                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1209                         status = -EACCES;
1210
1211                         mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1212                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1213                              (unsigned long long)newfe_blkno,
1214                              OCFS2_I(new_inode)->ip_flags);
1215                         goto bail;
1216                 }
1217
1218                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1219                 if (status < 0) {
1220                         if (status != -ENOENT)
1221                                 mlog_errno(status);
1222                         goto bail;
1223                 }
1224                 new_child_locked = 1;
1225
1226                 status = ocfs2_remote_dentry_delete(new_dentry);
1227                 if (status < 0) {
1228                         mlog_errno(status);
1229                         goto bail;
1230                 }
1231
1232                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1233
1234                 mlog(0, "aha rename over existing... new_blkno=%llu "
1235                      "newfebh=%p bhblocknr=%llu\n",
1236                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1237                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1238
1239                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1240                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1241                                                           new_inode,
1242                                                           orphan_name,
1243                                                           &orphan_insert);
1244                         if (status < 0) {
1245                                 mlog_errno(status);
1246                                 goto bail;
1247                         }
1248                 }
1249         } else {
1250                 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1251
1252                 status = ocfs2_check_dir_for_entry(new_dir,
1253                                                    new_dentry->d_name.name,
1254                                                    new_dentry->d_name.len);
1255                 if (status)
1256                         goto bail;
1257
1258                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1259                                                       new_dentry->d_name.name,
1260                                                       new_dentry->d_name.len,
1261                                                       &target_insert);
1262                 if (status < 0) {
1263                         mlog_errno(status);
1264                         goto bail;
1265                 }
1266         }
1267
1268         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1269         if (IS_ERR(handle)) {
1270                 status = PTR_ERR(handle);
1271                 handle = NULL;
1272                 mlog_errno(status);
1273                 goto bail;
1274         }
1275
1276         if (target_exists) {
1277                 if (S_ISDIR(new_inode->i_mode)) {
1278                         if (new_inode->i_nlink != 2 ||
1279                             !ocfs2_empty_dir(new_inode)) {
1280                                 status = -ENOTEMPTY;
1281                                 goto bail;
1282                         }
1283                 }
1284                 status = ocfs2_journal_access_di(handle, new_inode, newfe_bh,
1285                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1286                 if (status < 0) {
1287                         mlog_errno(status);
1288                         goto bail;
1289                 }
1290
1291                 if (S_ISDIR(new_inode->i_mode) ||
1292                     (ocfs2_read_links_count(newfe) == 1)) {
1293                         status = ocfs2_orphan_add(osb, handle, new_inode,
1294                                                   newfe, orphan_name,
1295                                                   &orphan_insert, orphan_dir);
1296                         if (status < 0) {
1297                                 mlog_errno(status);
1298                                 goto bail;
1299                         }
1300                 }
1301
1302                 /* change the dirent to point to the correct inode */
1303                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1304                                             old_inode);
1305                 if (status < 0) {
1306                         mlog_errno(status);
1307                         goto bail;
1308                 }
1309                 new_dir->i_version++;
1310
1311                 if (S_ISDIR(new_inode->i_mode))
1312                         ocfs2_set_links_count(newfe, 0);
1313                 else
1314                         ocfs2_add_links_count(newfe, -1);
1315
1316                 status = ocfs2_journal_dirty(handle, newfe_bh);
1317                 if (status < 0) {
1318                         mlog_errno(status);
1319                         goto bail;
1320                 }
1321         } else {
1322                 /* if the name was not found in new_dir, add it now */
1323                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1324                                          OCFS2_I(old_inode)->ip_blkno,
1325                                          new_dir_bh, &target_insert);
1326         }
1327
1328         old_inode->i_ctime = CURRENT_TIME;
1329         mark_inode_dirty(old_inode);
1330
1331         status = ocfs2_journal_access_di(handle, old_inode, old_inode_bh,
1332                                          OCFS2_JOURNAL_ACCESS_WRITE);
1333         if (status >= 0) {
1334                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1335
1336                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1337                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1338
1339                 status = ocfs2_journal_dirty(handle, old_inode_bh);
1340                 if (status < 0)
1341                         mlog_errno(status);
1342         } else
1343                 mlog_errno(status);
1344
1345         /*
1346          * Now that the name has been added to new_dir, remove the old name.
1347          *
1348          * We don't keep any directory entry context around until now
1349          * because the insert might have changed the type of directory
1350          * we're dealing with.
1351          */
1352         status = ocfs2_find_entry(old_dentry->d_name.name,
1353                                   old_dentry->d_name.len, old_dir,
1354                                   &old_entry_lookup);
1355         if (status)
1356                 goto bail;
1357
1358         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1359         if (status < 0) {
1360                 mlog_errno(status);
1361                 goto bail;
1362         }
1363
1364         if (new_inode) {
1365                 new_inode->i_nlink--;
1366                 new_inode->i_ctime = CURRENT_TIME;
1367         }
1368         old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1369
1370         if (update_dot_dot) {
1371                 status = ocfs2_update_entry(old_inode, handle,
1372                                             &old_inode_dot_dot_res, new_dir);
1373                 old_dir->i_nlink--;
1374                 if (new_inode) {
1375                         new_inode->i_nlink--;
1376                 } else {
1377                         inc_nlink(new_dir);
1378                         mark_inode_dirty(new_dir);
1379                 }
1380         }
1381         mark_inode_dirty(old_dir);
1382         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1383         if (new_inode) {
1384                 mark_inode_dirty(new_inode);
1385                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1386         }
1387
1388         if (old_dir != new_dir) {
1389                 /* Keep the same times on both directories.*/
1390                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1391
1392                 /*
1393                  * This will also pick up the i_nlink change from the
1394                  * block above.
1395                  */
1396                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1397         }
1398
1399         if (old_dir_nlink != old_dir->i_nlink) {
1400                 if (!old_dir_bh) {
1401                         mlog(ML_ERROR, "need to change nlink for old dir "
1402                              "%llu from %d to %d but bh is NULL!\n",
1403                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1404                              (int)old_dir_nlink, old_dir->i_nlink);
1405                 } else {
1406                         struct ocfs2_dinode *fe;
1407                         status = ocfs2_journal_access_di(handle, old_dir,
1408                                                       old_dir_bh,
1409                                                       OCFS2_JOURNAL_ACCESS_WRITE);
1410                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1411                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1412                         status = ocfs2_journal_dirty(handle, old_dir_bh);
1413                 }
1414         }
1415         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1416         status = 0;
1417 bail:
1418         if (rename_lock)
1419                 ocfs2_rename_unlock(osb);
1420
1421         if (handle)
1422                 ocfs2_commit_trans(osb, handle);
1423
1424         if (parents_locked)
1425                 ocfs2_double_unlock(old_dir, new_dir);
1426
1427         if (old_child_locked)
1428                 ocfs2_inode_unlock(old_inode, 1);
1429
1430         if (new_child_locked)
1431                 ocfs2_inode_unlock(new_inode, 1);
1432
1433         if (orphan_dir) {
1434                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1435                 ocfs2_inode_unlock(orphan_dir, 1);
1436                 mutex_unlock(&orphan_dir->i_mutex);
1437                 iput(orphan_dir);
1438         }
1439
1440         if (new_inode)
1441                 sync_mapping_buffers(old_inode->i_mapping);
1442
1443         if (new_inode)
1444                 iput(new_inode);
1445
1446         ocfs2_free_dir_lookup_result(&target_lookup_res);
1447         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1448         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1449         ocfs2_free_dir_lookup_result(&orphan_insert);
1450         ocfs2_free_dir_lookup_result(&target_insert);
1451
1452         brelse(newfe_bh);
1453         brelse(old_inode_bh);
1454         brelse(old_dir_bh);
1455         brelse(new_dir_bh);
1456
1457         mlog_exit(status);
1458
1459         return status;
1460 }
1461
1462 /*
1463  * we expect i_size = strlen(symname). Copy symname into the file
1464  * data, including the null terminator.
1465  */
1466 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1467                                      handle_t *handle,
1468                                      struct inode *inode,
1469                                      const char *symname)
1470 {
1471         struct buffer_head **bhs = NULL;
1472         const char *c;
1473         struct super_block *sb = osb->sb;
1474         u64 p_blkno, p_blocks;
1475         int virtual, blocks, status, i, bytes_left;
1476
1477         bytes_left = i_size_read(inode) + 1;
1478         /* we can't trust i_blocks because we're actually going to
1479          * write i_size + 1 bytes. */
1480         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1481
1482         mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
1483                         (unsigned long long)inode->i_blocks,
1484                         i_size_read(inode), blocks);
1485
1486         /* Sanity check -- make sure we're going to fit. */
1487         if (bytes_left >
1488             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1489                 status = -EIO;
1490                 mlog_errno(status);
1491                 goto bail;
1492         }
1493
1494         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1495         if (!bhs) {
1496                 status = -ENOMEM;
1497                 mlog_errno(status);
1498                 goto bail;
1499         }
1500
1501         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1502                                              NULL);
1503         if (status < 0) {
1504                 mlog_errno(status);
1505                 goto bail;
1506         }
1507
1508         /* links can never be larger than one cluster so we know this
1509          * is all going to be contiguous, but do a sanity check
1510          * anyway. */
1511         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1512                 status = -EIO;
1513                 mlog_errno(status);
1514                 goto bail;
1515         }
1516
1517         virtual = 0;
1518         while(bytes_left > 0) {
1519                 c = &symname[virtual * sb->s_blocksize];
1520
1521                 bhs[virtual] = sb_getblk(sb, p_blkno);
1522                 if (!bhs[virtual]) {
1523                         status = -ENOMEM;
1524                         mlog_errno(status);
1525                         goto bail;
1526                 }
1527                 ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]);
1528
1529                 status = ocfs2_journal_access(handle, inode, bhs[virtual],
1530                                               OCFS2_JOURNAL_ACCESS_CREATE);
1531                 if (status < 0) {
1532                         mlog_errno(status);
1533                         goto bail;
1534                 }
1535
1536                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1537
1538                 memcpy(bhs[virtual]->b_data, c,
1539                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1540                        bytes_left);
1541
1542                 status = ocfs2_journal_dirty(handle, bhs[virtual]);
1543                 if (status < 0) {
1544                         mlog_errno(status);
1545                         goto bail;
1546                 }
1547
1548                 virtual++;
1549                 p_blkno++;
1550                 bytes_left -= sb->s_blocksize;
1551         }
1552
1553         status = 0;
1554 bail:
1555
1556         if (bhs) {
1557                 for(i = 0; i < blocks; i++)
1558                         brelse(bhs[i]);
1559                 kfree(bhs);
1560         }
1561
1562         mlog_exit(status);
1563         return status;
1564 }
1565
1566 static int ocfs2_symlink(struct inode *dir,
1567                          struct dentry *dentry,
1568                          const char *symname)
1569 {
1570         int status, l, credits;
1571         u64 newsize;
1572         struct ocfs2_super *osb = NULL;
1573         struct inode *inode = NULL;
1574         struct super_block *sb;
1575         struct buffer_head *new_fe_bh = NULL;
1576         struct buffer_head *parent_fe_bh = NULL;
1577         struct ocfs2_dinode *fe = NULL;
1578         struct ocfs2_dinode *dirfe;
1579         handle_t *handle = NULL;
1580         struct ocfs2_alloc_context *inode_ac = NULL;
1581         struct ocfs2_alloc_context *data_ac = NULL;
1582         struct ocfs2_alloc_context *xattr_ac = NULL;
1583         int want_clusters = 0;
1584         int xattr_credits = 0;
1585         struct ocfs2_security_xattr_info si = {
1586                 .enable = 1,
1587         };
1588         int did_quota = 0, did_quota_inode = 0;
1589         struct ocfs2_dir_lookup_result lookup = { NULL, };
1590
1591         mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1592                    dentry, symname, dentry->d_name.len, dentry->d_name.name);
1593
1594         sb = dir->i_sb;
1595         osb = OCFS2_SB(sb);
1596
1597         l = strlen(symname) + 1;
1598
1599         credits = ocfs2_calc_symlink_credits(sb);
1600
1601         /* lock the parent directory */
1602         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1603         if (status < 0) {
1604                 if (status != -ENOENT)
1605                         mlog_errno(status);
1606                 return status;
1607         }
1608
1609         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1610         if (!ocfs2_read_links_count(dirfe)) {
1611                 /* can't make a file in a deleted directory. */
1612                 status = -ENOENT;
1613                 goto bail;
1614         }
1615
1616         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1617                                            dentry->d_name.len);
1618         if (status)
1619                 goto bail;
1620
1621         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1622                                               dentry->d_name.name,
1623                                               dentry->d_name.len, &lookup);
1624         if (status < 0) {
1625                 mlog_errno(status);
1626                 goto bail;
1627         }
1628
1629         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1630         if (status < 0) {
1631                 if (status != -ENOSPC)
1632                         mlog_errno(status);
1633                 goto bail;
1634         }
1635
1636         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1637         if (!inode) {
1638                 status = -ENOMEM;
1639                 mlog_errno(status);
1640                 goto bail;
1641         }
1642
1643         /* get security xattr */
1644         status = ocfs2_init_security_get(inode, dir, &si);
1645         if (status) {
1646                 if (status == -EOPNOTSUPP)
1647                         si.enable = 0;
1648                 else {
1649                         mlog_errno(status);
1650                         goto bail;
1651                 }
1652         }
1653
1654         /* calculate meta data/clusters for setting security xattr */
1655         if (si.enable) {
1656                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1657                                                   &xattr_credits, &xattr_ac);
1658                 if (status < 0) {
1659                         mlog_errno(status);
1660                         goto bail;
1661                 }
1662         }
1663
1664         /* don't reserve bitmap space for fast symlinks. */
1665         if (l > ocfs2_fast_symlink_chars(sb))
1666                 want_clusters += 1;
1667
1668         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1669         if (status < 0) {
1670                 if (status != -ENOSPC)
1671                         mlog_errno(status);
1672                 goto bail;
1673         }
1674
1675         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1676         if (IS_ERR(handle)) {
1677                 status = PTR_ERR(handle);
1678                 handle = NULL;
1679                 mlog_errno(status);
1680                 goto bail;
1681         }
1682
1683         /* We don't use standard VFS wrapper because we don't want vfs_dq_init
1684          * to be called. */
1685         if (sb_any_quota_active(osb->sb) &&
1686             osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
1687                 status = -EDQUOT;
1688                 goto bail;
1689         }
1690         did_quota_inode = 1;
1691
1692         status = ocfs2_mknod_locked(osb, dir, inode, dentry,
1693                                     0, &new_fe_bh, parent_fe_bh, handle,
1694                                     inode_ac);
1695         if (status < 0) {
1696                 mlog_errno(status);
1697                 goto bail;
1698         }
1699
1700         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1701         inode->i_rdev = 0;
1702         newsize = l - 1;
1703         if (l > ocfs2_fast_symlink_chars(sb)) {
1704                 u32 offset = 0;
1705
1706                 inode->i_op = &ocfs2_symlink_inode_operations;
1707                 if (vfs_dq_alloc_space_nodirty(inode,
1708                     ocfs2_clusters_to_bytes(osb->sb, 1))) {
1709                         status = -EDQUOT;
1710                         goto bail;
1711                 }
1712                 did_quota = 1;
1713                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1714                                               new_fe_bh,
1715                                               handle, data_ac, NULL,
1716                                               NULL);
1717                 if (status < 0) {
1718                         if (status != -ENOSPC && status != -EINTR) {
1719                                 mlog(ML_ERROR,
1720                                      "Failed to extend file to %llu\n",
1721                                      (unsigned long long)newsize);
1722                                 mlog_errno(status);
1723                                 status = -ENOSPC;
1724                         }
1725                         goto bail;
1726                 }
1727                 i_size_write(inode, newsize);
1728                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1729         } else {
1730                 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1731                 memcpy((char *) fe->id2.i_symlink, symname, l);
1732                 i_size_write(inode, newsize);
1733                 inode->i_blocks = 0;
1734         }
1735
1736         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1737         if (status < 0) {
1738                 mlog_errno(status);
1739                 goto bail;
1740         }
1741
1742         if (!ocfs2_inode_is_fast_symlink(inode)) {
1743                 status = ocfs2_create_symlink_data(osb, handle, inode,
1744                                                    symname);
1745                 if (status < 0) {
1746                         mlog_errno(status);
1747                         goto bail;
1748                 }
1749         }
1750
1751         if (si.enable) {
1752                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1753                                                  xattr_ac, data_ac);
1754                 if (status < 0) {
1755                         mlog_errno(status);
1756                         goto bail;
1757                 }
1758         }
1759
1760         status = ocfs2_add_entry(handle, dentry, inode,
1761                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
1762                                  &lookup);
1763         if (status < 0) {
1764                 mlog_errno(status);
1765                 goto bail;
1766         }
1767
1768         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1769         if (status) {
1770                 mlog_errno(status);
1771                 goto bail;
1772         }
1773
1774         insert_inode_hash(inode);
1775         dentry->d_op = &ocfs2_dentry_ops;
1776         d_instantiate(dentry, inode);
1777 bail:
1778         if (status < 0 && did_quota)
1779                 vfs_dq_free_space_nodirty(inode,
1780                                         ocfs2_clusters_to_bytes(osb->sb, 1));
1781         if (status < 0 && did_quota_inode)
1782                 vfs_dq_free_inode(inode);
1783         if (handle)
1784                 ocfs2_commit_trans(osb, handle);
1785
1786         ocfs2_inode_unlock(dir, 1);
1787
1788         brelse(new_fe_bh);
1789         brelse(parent_fe_bh);
1790         kfree(si.name);
1791         kfree(si.value);
1792         ocfs2_free_dir_lookup_result(&lookup);
1793         if (inode_ac)
1794                 ocfs2_free_alloc_context(inode_ac);
1795         if (data_ac)
1796                 ocfs2_free_alloc_context(data_ac);
1797         if (xattr_ac)
1798                 ocfs2_free_alloc_context(xattr_ac);
1799         if ((status < 0) && inode) {
1800                 clear_nlink(inode);
1801                 iput(inode);
1802         }
1803
1804         mlog_exit(status);
1805
1806         return status;
1807 }
1808
1809 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1810 {
1811         int status, namelen;
1812
1813         mlog_entry_void();
1814
1815         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1816                            (long long)blkno);
1817         if (namelen <= 0) {
1818                 if (namelen)
1819                         status = namelen;
1820                 else
1821                         status = -EINVAL;
1822                 mlog_errno(status);
1823                 goto bail;
1824         }
1825         if (namelen != OCFS2_ORPHAN_NAMELEN) {
1826                 status = -EINVAL;
1827                 mlog_errno(status);
1828                 goto bail;
1829         }
1830
1831         mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
1832              namelen);
1833
1834         status = 0;
1835 bail:
1836         mlog_exit(status);
1837         return status;
1838 }
1839
1840 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1841                                     struct inode **ret_orphan_dir,
1842                                     struct inode *inode,
1843                                     char *name,
1844                                     struct ocfs2_dir_lookup_result *lookup)
1845 {
1846         struct inode *orphan_dir_inode;
1847         struct buffer_head *orphan_dir_bh = NULL;
1848         int status = 0;
1849
1850         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
1851         if (status < 0) {
1852                 mlog_errno(status);
1853                 return status;
1854         }
1855
1856         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1857                                                        ORPHAN_DIR_SYSTEM_INODE,
1858                                                        osb->slot_num);
1859         if (!orphan_dir_inode) {
1860                 status = -ENOENT;
1861                 mlog_errno(status);
1862                 return status;
1863         }
1864
1865         mutex_lock(&orphan_dir_inode->i_mutex);
1866
1867         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1868         if (status < 0) {
1869                 mlog_errno(status);
1870                 goto leave;
1871         }
1872
1873         status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1874                                               orphan_dir_bh, name,
1875                                               OCFS2_ORPHAN_NAMELEN, lookup);
1876         if (status < 0) {
1877                 ocfs2_inode_unlock(orphan_dir_inode, 1);
1878
1879                 mlog_errno(status);
1880                 goto leave;
1881         }
1882
1883         *ret_orphan_dir = orphan_dir_inode;
1884
1885 leave:
1886         if (status) {
1887                 mutex_unlock(&orphan_dir_inode->i_mutex);
1888                 iput(orphan_dir_inode);
1889         }
1890
1891         brelse(orphan_dir_bh);
1892
1893         mlog_exit(status);
1894         return status;
1895 }
1896
1897 static int ocfs2_orphan_add(struct ocfs2_super *osb,
1898                             handle_t *handle,
1899                             struct inode *inode,
1900                             struct ocfs2_dinode *fe,
1901                             char *name,
1902                             struct ocfs2_dir_lookup_result *lookup,
1903                             struct inode *orphan_dir_inode)
1904 {
1905         struct buffer_head *orphan_dir_bh = NULL;
1906         int status = 0;
1907         struct ocfs2_dinode *orphan_fe;
1908
1909         mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
1910
1911         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
1912         if (status < 0) {
1913                 mlog_errno(status);
1914                 goto leave;
1915         }
1916
1917         status = ocfs2_journal_access_di(handle, orphan_dir_inode, orphan_dir_bh,
1918                                          OCFS2_JOURNAL_ACCESS_WRITE);
1919         if (status < 0) {
1920                 mlog_errno(status);
1921                 goto leave;
1922         }
1923
1924         /* we're a cluster, and nlink can change on disk from
1925          * underneath us... */
1926         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
1927         if (S_ISDIR(inode->i_mode))
1928                 ocfs2_add_links_count(orphan_fe, 1);
1929         orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
1930
1931         status = ocfs2_journal_dirty(handle, orphan_dir_bh);
1932         if (status < 0) {
1933                 mlog_errno(status);
1934                 goto leave;
1935         }
1936
1937         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
1938                                    OCFS2_ORPHAN_NAMELEN, inode,
1939                                    OCFS2_I(inode)->ip_blkno,
1940                                    orphan_dir_bh, lookup);
1941         if (status < 0) {
1942                 mlog_errno(status);
1943                 goto leave;
1944         }
1945
1946         le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
1947
1948         /* Record which orphan dir our inode now resides
1949          * in. delete_inode will use this to determine which orphan
1950          * dir to lock. */
1951         fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
1952
1953         mlog(0, "Inode %llu orphaned in slot %d\n",
1954              (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);
1955
1956 leave:
1957         brelse(orphan_dir_bh);
1958
1959         mlog_exit(status);
1960         return status;
1961 }
1962
1963 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
1964 int ocfs2_orphan_del(struct ocfs2_super *osb,
1965                      handle_t *handle,
1966                      struct inode *orphan_dir_inode,
1967                      struct inode *inode,
1968                      struct buffer_head *orphan_dir_bh)
1969 {
1970         char name[OCFS2_ORPHAN_NAMELEN + 1];
1971         struct ocfs2_dinode *orphan_fe;
1972         int status = 0;
1973         struct ocfs2_dir_lookup_result lookup = { NULL, };
1974
1975         mlog_entry_void();
1976
1977         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
1978         if (status < 0) {
1979                 mlog_errno(status);
1980                 goto leave;
1981         }
1982
1983         mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
1984              name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
1985              OCFS2_ORPHAN_NAMELEN);
1986
1987         /* find it's spot in the orphan directory */
1988         status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
1989                                   &lookup);
1990         if (status) {
1991                 mlog_errno(status);
1992                 goto leave;
1993         }
1994
1995         /* remove it from the orphan directory */
1996         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
1997         if (status < 0) {
1998                 mlog_errno(status);
1999                 goto leave;
2000         }
2001
2002         status = ocfs2_journal_access_di(handle,orphan_dir_inode,  orphan_dir_bh,
2003                                          OCFS2_JOURNAL_ACCESS_WRITE);
2004         if (status < 0) {
2005                 mlog_errno(status);
2006                 goto leave;
2007         }
2008
2009         /* do the i_nlink dance! :) */
2010         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2011         if (S_ISDIR(inode->i_mode))
2012                 ocfs2_add_links_count(orphan_fe, -1);
2013         orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
2014
2015         status = ocfs2_journal_dirty(handle, orphan_dir_bh);
2016         if (status < 0) {
2017                 mlog_errno(status);
2018                 goto leave;
2019         }
2020
2021 leave:
2022         ocfs2_free_dir_lookup_result(&lookup);
2023
2024         mlog_exit(status);
2025         return status;
2026 }
2027
2028 const struct inode_operations ocfs2_dir_iops = {
2029         .create         = ocfs2_create,
2030         .lookup         = ocfs2_lookup,
2031         .link           = ocfs2_link,
2032         .unlink         = ocfs2_unlink,
2033         .rmdir          = ocfs2_unlink,
2034         .symlink        = ocfs2_symlink,
2035         .mkdir          = ocfs2_mkdir,
2036         .mknod          = ocfs2_mknod,
2037         .rename         = ocfs2_rename,
2038         .setattr        = ocfs2_setattr,
2039         .getattr        = ocfs2_getattr,
2040         .permission     = ocfs2_permission,
2041         .setxattr       = generic_setxattr,
2042         .getxattr       = generic_getxattr,
2043         .listxattr      = ocfs2_listxattr,
2044         .removexattr    = generic_removexattr,
2045 };