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   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_nested(dir, NULL, 0, OI_LS_PARENT);
 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, INODE_CACHE(dir),
 379                                                  parent_fe_bh,
 380                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 381                 if (status < 0) {
 382                         mlog_errno(status);
 383                         goto leave;
 384                 }
 385                 ocfs2_add_links_count(dirfe, 1);
 386                 status = ocfs2_journal_dirty(handle, parent_fe_bh);
 387                 if (status < 0) {
 388                         mlog_errno(status);
 389                         goto leave;
 390                 }
 391                 inc_nlink(dir);
 392         }
 393
 394         status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
 395                                 meta_ac, data_ac);
 396         if (status < 0) {
 397                 mlog_errno(status);
 398                 goto leave;
 399         }
 400
 401         if (si.enable) {
 402                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
 403                                                  meta_ac, data_ac);
 404                 if (status < 0) {
 405                         mlog_errno(status);
 406                         goto leave;
 407                 }
 408         }
 409
 410         status = ocfs2_add_entry(handle, dentry, inode,
 411                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
 412                                  &lookup);
 413         if (status < 0) {
 414                 mlog_errno(status);
 415                 goto leave;
 416         }
 417
 418         status = ocfs2_dentry_attach_lock(dentry, inode,
 419                                           OCFS2_I(dir)->ip_blkno);
 420         if (status) {
 421                 mlog_errno(status);
 422                 goto leave;
 423         }
 424
 425         insert_inode_hash(inode);
 426         dentry->d_op = &ocfs2_dentry_ops;
 427         d_instantiate(dentry, inode);
 428         status = 0;
 429 leave:
 430         if (status < 0 && did_quota_inode)
 431                 vfs_dq_free_inode(inode);
 432         if (handle)
 433                 ocfs2_commit_trans(osb, handle);
 434
 435         ocfs2_inode_unlock(dir, 1);
 436
 437         if (status == -ENOSPC)
 438                 mlog(0, "Disk is full\n");
 439
 440         brelse(new_fe_bh);
 441         brelse(parent_fe_bh);
 442         kfree(si.name);
 443         kfree(si.value);
 444
 445         ocfs2_free_dir_lookup_result(&lookup);
 446
 447         if ((status < 0) && inode) {
 448                 clear_nlink(inode);
 449                 iput(inode);
 450         }
 451
 452         if (inode_ac)
 453                 ocfs2_free_alloc_context(inode_ac);
 454
 455         if (data_ac)
 456                 ocfs2_free_alloc_context(data_ac);
 457
 458         if (meta_ac)
 459                 ocfs2_free_alloc_context(meta_ac);
 460
 461         mlog_exit(status);
 462
 463         return status;
 464 }
 465
 466 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 467                               struct inode *dir,
 468                               struct inode *inode,
 469                               struct dentry *dentry,
 470                               dev_t dev,
 471                               struct buffer_head **new_fe_bh,
 472                               struct buffer_head *parent_fe_bh,
 473                               handle_t *handle,
 474                               struct ocfs2_alloc_context *inode_ac)
 475 {
 476         int status = 0;
 477         struct ocfs2_dinode *fe = NULL;
 478         struct ocfs2_extent_list *fel;
 479         u64 fe_blkno = 0;
 480         u16 suballoc_bit;
 481         u16 feat;
 482
 483         mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry,
 484                    inode->i_mode, (unsigned long)dev, dentry->d_name.len,
 485                    dentry->d_name.name);
 486
 487         *new_fe_bh = NULL;
 488
 489         status = ocfs2_claim_new_inode(osb, handle, dir, parent_fe_bh,
 490                                        inode_ac, &suballoc_bit, &fe_blkno);
 491         if (status < 0) {
 492                 mlog_errno(status);
 493                 goto leave;
 494         }
 495
 496         /* populate as many fields early on as possible - many of
 497          * these are used by the support functions here and in
 498          * callers. */
 499         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
 500         OCFS2_I(inode)->ip_blkno = fe_blkno;
 501         spin_lock(&osb->osb_lock);
 502         inode->i_generation = osb->s_next_generation++;
 503         spin_unlock(&osb->osb_lock);
 504
 505         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
 506         if (!*new_fe_bh) {
 507                 status = -EIO;
 508                 mlog_errno(status);
 509                 goto leave;
 510         }
 511         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
 512
 513         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
 514                                          *new_fe_bh,
 515                                          OCFS2_JOURNAL_ACCESS_CREATE);
 516         if (status < 0) {
 517                 mlog_errno(status);
 518                 goto leave;
 519         }
 520
 521         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
 522         memset(fe, 0, osb->sb->s_blocksize);
 523
 524         fe->i_generation = cpu_to_le32(inode->i_generation);
 525         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
 526         fe->i_blkno = cpu_to_le64(fe_blkno);
 527         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
 528         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
 529         fe->i_uid = cpu_to_le32(inode->i_uid);
 530         fe->i_gid = cpu_to_le32(inode->i_gid);
 531         fe->i_mode = cpu_to_le16(inode->i_mode);
 532         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 533                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
 534
 535         ocfs2_set_links_count(fe, inode->i_nlink);
 536
 537         fe->i_last_eb_blk = 0;
 538         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 539         le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
 540         fe->i_atime = fe->i_ctime = fe->i_mtime =
 541                 cpu_to_le64(CURRENT_TIME.tv_sec);
 542         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
 543                 cpu_to_le32(CURRENT_TIME.tv_nsec);
 544         fe->i_dtime = 0;
 545
 546         /*
 547          * If supported, directories start with inline data. If inline
 548          * isn't supported, but indexing is, we start them as indexed.
 549          */
 550         feat = le16_to_cpu(fe->i_dyn_features);
 551         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
 552                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
 553
 554                 fe->id2.i_data.id_count = cpu_to_le16(
 555                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
 556         } else {
 557                 fel = &fe->id2.i_list;
 558                 fel->l_tree_depth = 0;
 559                 fel->l_next_free_rec = 0;
 560                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
 561         }
 562
 563         status = ocfs2_journal_dirty(handle, *new_fe_bh);
 564         if (status < 0) {
 565                 mlog_errno(status);
 566                 goto leave;
 567         }
 568
 569         ocfs2_populate_inode(inode, fe, 1);
 570         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
 571         if (!ocfs2_mount_local(osb)) {
 572                 status = ocfs2_create_new_inode_locks(inode);
 573                 if (status < 0)
 574                         mlog_errno(status);
 575         }
 576
 577         status = 0; /* error in ocfs2_create_new_inode_locks is not
 578                      * critical */
 579
 580 leave:
 581         if (status < 0) {
 582                 if (*new_fe_bh) {
 583                         brelse(*new_fe_bh);
 584                         *new_fe_bh = NULL;
 585                 }
 586         }
 587
 588         mlog_exit(status);
 589         return status;
 590 }
 591
 592 static int ocfs2_mkdir(struct inode *dir,
 593                        struct dentry *dentry,
 594                        int mode)
 595 {
 596         int ret;
 597
 598         mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
 599                    dentry->d_name.len, dentry->d_name.name);
 600         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
 601         mlog_exit(ret);
 602
 603         return ret;
 604 }
 605
 606 static int ocfs2_create(struct inode *dir,
 607                         struct dentry *dentry,
 608                         int mode,
 609                         struct nameidata *nd)
 610 {
 611         int ret;
 612
 613         mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
 614                    dentry->d_name.len, dentry->d_name.name);
 615         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
 616         mlog_exit(ret);
 617
 618         return ret;
 619 }
 620
 621 static int ocfs2_link(struct dentry *old_dentry,
 622                       struct inode *dir,
 623                       struct dentry *dentry)
 624 {
 625         handle_t *handle;
 626         struct inode *inode = old_dentry->d_inode;
 627         int err;
 628         struct buffer_head *fe_bh = NULL;
 629         struct buffer_head *parent_fe_bh = NULL;
 630         struct ocfs2_dinode *fe = NULL;
 631         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 632         struct ocfs2_dir_lookup_result lookup = { NULL, };
 633
 634         mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
 635                    old_dentry->d_name.len, old_dentry->d_name.name,
 636                    dentry->d_name.len, dentry->d_name.name);
 637
 638         if (S_ISDIR(inode->i_mode))
 639                 return -EPERM;
 640
 641         err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
 642         if (err < 0) {
 643                 if (err != -ENOENT)
 644                         mlog_errno(err);
 645                 return err;
 646         }
 647
 648         if (!dir->i_nlink) {
 649                 err = -ENOENT;
 650                 goto out;
 651         }
 652
 653         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 654                                         dentry->d_name.len);
 655         if (err)
 656                 goto out;
 657
 658         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 659                                            dentry->d_name.name,
 660                                            dentry->d_name.len, &lookup);
 661         if (err < 0) {
 662                 mlog_errno(err);
 663                 goto out;
 664         }
 665
 666         err = ocfs2_inode_lock(inode, &fe_bh, 1);
 667         if (err < 0) {
 668                 if (err != -ENOENT)
 669                         mlog_errno(err);
 670                 goto out;
 671         }
 672
 673         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 674         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
 675                 err = -EMLINK;
 676                 goto out_unlock_inode;
 677         }
 678
 679         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
 680         if (IS_ERR(handle)) {
 681                 err = PTR_ERR(handle);
 682                 handle = NULL;
 683                 mlog_errno(err);
 684                 goto out_unlock_inode;
 685         }
 686
 687         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 688                                       OCFS2_JOURNAL_ACCESS_WRITE);
 689         if (err < 0) {
 690                 mlog_errno(err);
 691                 goto out_commit;
 692         }
 693
 694         inc_nlink(inode);
 695         inode->i_ctime = CURRENT_TIME;
 696         ocfs2_set_links_count(fe, inode->i_nlink);
 697         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 698         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 699
 700         err = ocfs2_journal_dirty(handle, fe_bh);
 701         if (err < 0) {
 702                 ocfs2_add_links_count(fe, -1);
 703                 drop_nlink(inode);
 704                 mlog_errno(err);
 705                 goto out_commit;
 706         }
 707
 708         err = ocfs2_add_entry(handle, dentry, inode,
 709                               OCFS2_I(inode)->ip_blkno,
 710                               parent_fe_bh, &lookup);
 711         if (err) {
 712                 ocfs2_add_links_count(fe, -1);
 713                 drop_nlink(inode);
 714                 mlog_errno(err);
 715                 goto out_commit;
 716         }
 717
 718         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
 719         if (err) {
 720                 mlog_errno(err);
 721                 goto out_commit;
 722         }
 723
 724         atomic_inc(&inode->i_count);
 725         dentry->d_op = &ocfs2_dentry_ops;
 726         d_instantiate(dentry, inode);
 727
 728 out_commit:
 729         ocfs2_commit_trans(osb, handle);
 730 out_unlock_inode:
 731         ocfs2_inode_unlock(inode, 1);
 732
 733 out:
 734         ocfs2_inode_unlock(dir, 1);
 735
 736         brelse(fe_bh);
 737         brelse(parent_fe_bh);
 738
 739         ocfs2_free_dir_lookup_result(&lookup);
 740
 741         mlog_exit(err);
 742
 743         return err;
 744 }
 745
 746 /*
 747  * Takes and drops an exclusive lock on the given dentry. This will
 748  * force other nodes to drop it.
 749  */
 750 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 751 {
 752         int ret;
 753
 754         ret = ocfs2_dentry_lock(dentry, 1);
 755         if (ret)
 756                 mlog_errno(ret);
 757         else
 758                 ocfs2_dentry_unlock(dentry, 1);
 759
 760         return ret;
 761 }
 762
 763 static inline int inode_is_unlinkable(struct inode *inode)
 764 {
 765         if (S_ISDIR(inode->i_mode)) {
 766                 if (inode->i_nlink == 2)
 767                         return 1;
 768                 return 0;
 769         }
 770
 771         if (inode->i_nlink == 1)
 772                 return 1;
 773         return 0;
 774 }
 775
 776 static int ocfs2_unlink(struct inode *dir,
 777                         struct dentry *dentry)
 778 {
 779         int status;
 780         int child_locked = 0;
 781         struct inode *inode = dentry->d_inode;
 782         struct inode *orphan_dir = NULL;
 783         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 784         u64 blkno;
 785         struct ocfs2_dinode *fe = NULL;
 786         struct buffer_head *fe_bh = NULL;
 787         struct buffer_head *parent_node_bh = NULL;
 788         handle_t *handle = NULL;
 789         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 790         struct ocfs2_dir_lookup_result lookup = { NULL, };
 791         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
 792
 793         mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
 794                    dentry->d_name.len, dentry->d_name.name);
 795
 796         BUG_ON(dentry->d_parent->d_inode != dir);
 797
 798         mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);
 799
 800         if (inode == osb->root_inode) {
 801                 mlog(0, "Cannot delete the root directory\n");
 802                 return -EPERM;
 803         }
 804
 805         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
 806                                          OI_LS_PARENT);
 807         if (status < 0) {
 808                 if (status != -ENOENT)
 809                         mlog_errno(status);
 810                 return status;
 811         }
 812
 813         status = ocfs2_find_files_on_disk(dentry->d_name.name,
 814                                           dentry->d_name.len, &blkno, dir,
 815                                           &lookup);
 816         if (status < 0) {
 817                 if (status != -ENOENT)
 818                         mlog_errno(status);
 819                 goto leave;
 820         }
 821
 822         if (OCFS2_I(inode)->ip_blkno != blkno) {
 823                 status = -ENOENT;
 824
 825                 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
 826                      (unsigned long long)OCFS2_I(inode)->ip_blkno,
 827                      (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
 828                 goto leave;
 829         }
 830
 831         status = ocfs2_inode_lock(inode, &fe_bh, 1);
 832         if (status < 0) {
 833                 if (status != -ENOENT)
 834                         mlog_errno(status);
 835                 goto leave;
 836         }
 837         child_locked = 1;
 838
 839         if (S_ISDIR(inode->i_mode)) {
 840                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
 841                         status = -ENOTEMPTY;
 842                         goto leave;
 843                 }
 844         }
 845
 846         status = ocfs2_remote_dentry_delete(dentry);
 847         if (status < 0) {
 848                 /* This remote delete should succeed under all normal
 849                  * circumstances. */
 850                 mlog_errno(status);
 851                 goto leave;
 852         }
 853
 854         if (inode_is_unlinkable(inode)) {
 855                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, inode,
 856                                                   orphan_name, &orphan_insert);
 857                 if (status < 0) {
 858                         mlog_errno(status);
 859                         goto leave;
 860                 }
 861         }
 862
 863         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
 864         if (IS_ERR(handle)) {
 865                 status = PTR_ERR(handle);
 866                 handle = NULL;
 867                 mlog_errno(status);
 868                 goto leave;
 869         }
 870
 871         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 872                                          OCFS2_JOURNAL_ACCESS_WRITE);
 873         if (status < 0) {
 874                 mlog_errno(status);
 875                 goto leave;
 876         }
 877
 878         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 879
 880         if (inode_is_unlinkable(inode)) {
 881                 status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name,
 882                                           &orphan_insert, orphan_dir);
 883                 if (status < 0) {
 884                         mlog_errno(status);
 885                         goto leave;
 886                 }
 887         }
 888
 889         /* delete the name from the parent dir */
 890         status = ocfs2_delete_entry(handle, dir, &lookup);
 891         if (status < 0) {
 892                 mlog_errno(status);
 893                 goto leave;
 894         }
 895
 896         if (S_ISDIR(inode->i_mode))
 897                 drop_nlink(inode);
 898         drop_nlink(inode);
 899         ocfs2_set_links_count(fe, inode->i_nlink);
 900
 901         status = ocfs2_journal_dirty(handle, fe_bh);
 902         if (status < 0) {
 903                 mlog_errno(status);
 904                 goto leave;
 905         }
 906
 907         dir->i_ctime = dir->i_mtime = CURRENT_TIME;
 908         if (S_ISDIR(inode->i_mode))
 909                 drop_nlink(dir);
 910
 911         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
 912         if (status < 0) {
 913                 mlog_errno(status);
 914                 if (S_ISDIR(inode->i_mode))
 915                         inc_nlink(dir);
 916         }
 917
 918 leave:
 919         if (handle)
 920                 ocfs2_commit_trans(osb, handle);
 921
 922         if (child_locked)
 923                 ocfs2_inode_unlock(inode, 1);
 924
 925         ocfs2_inode_unlock(dir, 1);
 926
 927         if (orphan_dir) {
 928                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
 929                 ocfs2_inode_unlock(orphan_dir, 1);
 930                 mutex_unlock(&orphan_dir->i_mutex);
 931                 iput(orphan_dir);
 932         }
 933
 934         brelse(fe_bh);
 935         brelse(parent_node_bh);
 936
 937         ocfs2_free_dir_lookup_result(&orphan_insert);
 938         ocfs2_free_dir_lookup_result(&lookup);
 939
 940         mlog_exit(status);
 941
 942         return status;
 943 }
 944
 945 /*
 946  * The only place this should be used is rename!
 947  * if they have the same id, then the 1st one is the only one locked.
 948  */
 949 static int ocfs2_double_lock(struct ocfs2_super *osb,
 950                              struct buffer_head **bh1,
 951                              struct inode *inode1,
 952                              struct buffer_head **bh2,
 953                              struct inode *inode2)
 954 {
 955         int status;
 956         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
 957         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
 958         struct buffer_head **tmpbh;
 959         struct inode *tmpinode;
 960
 961         mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
 962                    (unsigned long long)oi1->ip_blkno,
 963                    (unsigned long long)oi2->ip_blkno);
 964
 965         if (*bh1)
 966                 *bh1 = NULL;
 967         if (*bh2)
 968                 *bh2 = NULL;
 969
 970         /* we always want to lock the one with the lower lockid first. */
 971         if (oi1->ip_blkno != oi2->ip_blkno) {
 972                 if (oi1->ip_blkno < oi2->ip_blkno) {
 973                         /* switch id1 and id2 around */
 974                         mlog(0, "switching them around...\n");
 975                         tmpbh = bh2;
 976                         bh2 = bh1;
 977                         bh1 = tmpbh;
 978
 979                         tmpinode = inode2;
 980                         inode2 = inode1;
 981                         inode1 = tmpinode;
 982                 }
 983                 /* lock id2 */
 984                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
 985                                                  OI_LS_RENAME1);
 986                 if (status < 0) {
 987                         if (status != -ENOENT)
 988                                 mlog_errno(status);
 989                         goto bail;
 990                 }
 991         }
 992
 993         /* lock id1 */
 994         status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
 995         if (status < 0) {
 996                 /*
 997                  * An error return must mean that no cluster locks
 998                  * were held on function exit.
 999                  */
1000                 if (oi1->ip_blkno != oi2->ip_blkno)
1001                         ocfs2_inode_unlock(inode2, 1);
1002
1003                 if (status != -ENOENT)
1004                         mlog_errno(status);
1005         }
1006
1007 bail:
1008         mlog_exit(status);
1009         return status;
1010 }
1011
1012 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1013 {
1014         ocfs2_inode_unlock(inode1, 1);
1015
1016         if (inode1 != inode2)
1017                 ocfs2_inode_unlock(inode2, 1);
1018 }
1019
1020 static int ocfs2_rename(struct inode *old_dir,
1021                         struct dentry *old_dentry,
1022                         struct inode *new_dir,
1023                         struct dentry *new_dentry)
1024 {
1025         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1026         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1027         struct inode *old_inode = old_dentry->d_inode;
1028         struct inode *new_inode = new_dentry->d_inode;
1029         struct inode *orphan_dir = NULL;
1030         struct ocfs2_dinode *newfe = NULL;
1031         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1032         struct buffer_head *newfe_bh = NULL;
1033         struct buffer_head *old_inode_bh = NULL;
1034         struct ocfs2_super *osb = NULL;
1035         u64 newfe_blkno, old_de_ino;
1036         handle_t *handle = NULL;
1037         struct buffer_head *old_dir_bh = NULL;
1038         struct buffer_head *new_dir_bh = NULL;
1039         nlink_t old_dir_nlink = old_dir->i_nlink;
1040         struct ocfs2_dinode *old_di;
1041         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1042         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1043         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1044         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1045         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1046
1047         /* At some point it might be nice to break this function up a
1048          * bit. */
1049
1050         mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
1051                    old_dir, old_dentry, new_dir, new_dentry,
1052                    old_dentry->d_name.len, old_dentry->d_name.name,
1053                    new_dentry->d_name.len, new_dentry->d_name.name);
1054
1055         osb = OCFS2_SB(old_dir->i_sb);
1056
1057         if (new_inode) {
1058                 if (!igrab(new_inode))
1059                         BUG();
1060         }
1061
1062         /* Assume a directory hierarchy thusly:
1063          * a/b/c
1064          * a/d
1065          * a,b,c, and d are all directories.
1066          *
1067          * from cwd of 'a' on both nodes:
1068          * node1: mv b/c d
1069          * node2: mv d   b/c
1070          *
1071          * And that's why, just like the VFS, we need a file system
1072          * rename lock. */
1073         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1074                 status = ocfs2_rename_lock(osb);
1075                 if (status < 0) {
1076                         mlog_errno(status);
1077                         goto bail;
1078                 }
1079                 rename_lock = 1;
1080         }
1081
1082         /* if old and new are the same, this'll just do one lock. */
1083         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1084                                    &new_dir_bh, new_dir);
1085         if (status < 0) {
1086                 mlog_errno(status);
1087                 goto bail;
1088         }
1089         parents_locked = 1;
1090
1091         /* make sure both dirs have bhs
1092          * get an extra ref on old_dir_bh if old==new */
1093         if (!new_dir_bh) {
1094                 if (old_dir_bh) {
1095                         new_dir_bh = old_dir_bh;
1096                         get_bh(new_dir_bh);
1097                 } else {
1098                         mlog(ML_ERROR, "no old_dir_bh!\n");
1099                         status = -EIO;
1100                         goto bail;
1101                 }
1102         }
1103
1104         /*
1105          * Aside from allowing a meta data update, the locking here
1106          * also ensures that the downconvert thread on other nodes
1107          * won't have to concurrently downconvert the inode and the
1108          * dentry locks.
1109          */
1110         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1111                                          OI_LS_PARENT);
1112         if (status < 0) {
1113                 if (status != -ENOENT)
1114                         mlog_errno(status);
1115                 goto bail;
1116         }
1117         old_child_locked = 1;
1118
1119         status = ocfs2_remote_dentry_delete(old_dentry);
1120         if (status < 0) {
1121                 mlog_errno(status);
1122                 goto bail;
1123         }
1124
1125         if (S_ISDIR(old_inode->i_mode)) {
1126                 u64 old_inode_parent;
1127
1128                 update_dot_dot = 1;
1129                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1130                                                   old_inode,
1131                                                   &old_inode_dot_dot_res);
1132                 if (status) {
1133                         status = -EIO;
1134                         goto bail;
1135                 }
1136
1137                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1138                         status = -EIO;
1139                         goto bail;
1140                 }
1141
1142                 if (!new_inode && new_dir != old_dir &&
1143                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1144                         status = -EMLINK;
1145                         goto bail;
1146                 }
1147         }
1148
1149         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1150                                             old_dentry->d_name.len,
1151                                             &old_de_ino);
1152         if (status) {
1153                 status = -ENOENT;
1154                 goto bail;
1155         }
1156
1157         /*
1158          *  Check for inode number is _not_ due to possible IO errors.
1159          *  We might rmdir the source, keep it as pwd of some process
1160          *  and merrily kill the link to whatever was created under the
1161          *  same name. Goodbye sticky bit ;-<
1162          */
1163         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1164                 status = -ENOENT;
1165                 goto bail;
1166         }
1167
1168         /* check if the target already exists (in which case we need
1169          * to delete it */
1170         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1171                                           new_dentry->d_name.len,
1172                                           &newfe_blkno, new_dir,
1173                                           &target_lookup_res);
1174         /* The only error we allow here is -ENOENT because the new
1175          * file not existing is perfectly valid. */
1176         if ((status < 0) && (status != -ENOENT)) {
1177                 /* If we cannot find the file specified we should just */
1178                 /* return the error... */
1179                 mlog_errno(status);
1180                 goto bail;
1181         }
1182         if (status == 0)
1183                 target_exists = 1;
1184
1185         if (!target_exists && new_inode) {
1186                 /*
1187                  * Target was unlinked by another node while we were
1188                  * waiting to get to ocfs2_rename(). There isn't
1189                  * anything we can do here to help the situation, so
1190                  * bubble up the appropriate error.
1191                  */
1192                 status = -ENOENT;
1193                 goto bail;
1194         }
1195
1196         /* In case we need to overwrite an existing file, we blow it
1197          * away first */
1198         if (target_exists) {
1199                 /* VFS didn't think there existed an inode here, but
1200                  * someone else in the cluster must have raced our
1201                  * rename to create one. Today we error cleanly, in
1202                  * the future we should consider calling iget to build
1203                  * a new struct inode for this entry. */
1204                 if (!new_inode) {
1205                         status = -EACCES;
1206
1207                         mlog(0, "We found an inode for name %.*s but VFS "
1208                              "didn't give us one.\n", new_dentry->d_name.len,
1209                              new_dentry->d_name.name);
1210                         goto bail;
1211                 }
1212
1213                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1214                         status = -EACCES;
1215
1216                         mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1217                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1218                              (unsigned long long)newfe_blkno,
1219                              OCFS2_I(new_inode)->ip_flags);
1220                         goto bail;
1221                 }
1222
1223                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1224                 if (status < 0) {
1225                         if (status != -ENOENT)
1226                                 mlog_errno(status);
1227                         goto bail;
1228                 }
1229                 new_child_locked = 1;
1230
1231                 status = ocfs2_remote_dentry_delete(new_dentry);
1232                 if (status < 0) {
1233                         mlog_errno(status);
1234                         goto bail;
1235                 }
1236
1237                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1238
1239                 mlog(0, "aha rename over existing... new_blkno=%llu "
1240                      "newfebh=%p bhblocknr=%llu\n",
1241                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1242                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1243
1244                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1245                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1246                                                           new_inode,
1247                                                           orphan_name,
1248                                                           &orphan_insert);
1249                         if (status < 0) {
1250                                 mlog_errno(status);
1251                                 goto bail;
1252                         }
1253                 }
1254         } else {
1255                 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1256
1257                 status = ocfs2_check_dir_for_entry(new_dir,
1258                                                    new_dentry->d_name.name,
1259                                                    new_dentry->d_name.len);
1260                 if (status)
1261                         goto bail;
1262
1263                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1264                                                       new_dentry->d_name.name,
1265                                                       new_dentry->d_name.len,
1266                                                       &target_insert);
1267                 if (status < 0) {
1268                         mlog_errno(status);
1269                         goto bail;
1270                 }
1271         }
1272
1273         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1274         if (IS_ERR(handle)) {
1275                 status = PTR_ERR(handle);
1276                 handle = NULL;
1277                 mlog_errno(status);
1278                 goto bail;
1279         }
1280
1281         if (target_exists) {
1282                 if (S_ISDIR(new_inode->i_mode)) {
1283                         if (new_inode->i_nlink != 2 ||
1284                             !ocfs2_empty_dir(new_inode)) {
1285                                 status = -ENOTEMPTY;
1286                                 goto bail;
1287                         }
1288                 }
1289                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1290                                                  newfe_bh,
1291                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1292                 if (status < 0) {
1293                         mlog_errno(status);
1294                         goto bail;
1295                 }
1296
1297                 if (S_ISDIR(new_inode->i_mode) ||
1298                     (ocfs2_read_links_count(newfe) == 1)) {
1299                         status = ocfs2_orphan_add(osb, handle, new_inode,
1300                                                   newfe, orphan_name,
1301                                                   &orphan_insert, orphan_dir);
1302                         if (status < 0) {
1303                                 mlog_errno(status);
1304                                 goto bail;
1305                         }
1306                 }
1307
1308                 /* change the dirent to point to the correct inode */
1309                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1310                                             old_inode);
1311                 if (status < 0) {
1312                         mlog_errno(status);
1313                         goto bail;
1314                 }
1315                 new_dir->i_version++;
1316
1317                 if (S_ISDIR(new_inode->i_mode))
1318                         ocfs2_set_links_count(newfe, 0);
1319                 else
1320                         ocfs2_add_links_count(newfe, -1);
1321
1322                 status = ocfs2_journal_dirty(handle, newfe_bh);
1323                 if (status < 0) {
1324                         mlog_errno(status);
1325                         goto bail;
1326                 }
1327         } else {
1328                 /* if the name was not found in new_dir, add it now */
1329                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1330                                          OCFS2_I(old_inode)->ip_blkno,
1331                                          new_dir_bh, &target_insert);
1332         }
1333
1334         old_inode->i_ctime = CURRENT_TIME;
1335         mark_inode_dirty(old_inode);
1336
1337         status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1338                                          old_inode_bh,
1339                                          OCFS2_JOURNAL_ACCESS_WRITE);
1340         if (status >= 0) {
1341                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1342
1343                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1344                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1345
1346                 status = ocfs2_journal_dirty(handle, old_inode_bh);
1347                 if (status < 0)
1348                         mlog_errno(status);
1349         } else
1350                 mlog_errno(status);
1351
1352         /*
1353          * Now that the name has been added to new_dir, remove the old name.
1354          *
1355          * We don't keep any directory entry context around until now
1356          * because the insert might have changed the type of directory
1357          * we're dealing with.
1358          */
1359         status = ocfs2_find_entry(old_dentry->d_name.name,
1360                                   old_dentry->d_name.len, old_dir,
1361                                   &old_entry_lookup);
1362         if (status)
1363                 goto bail;
1364
1365         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1366         if (status < 0) {
1367                 mlog_errno(status);
1368                 goto bail;
1369         }
1370
1371         if (new_inode) {
1372                 new_inode->i_nlink--;
1373                 new_inode->i_ctime = CURRENT_TIME;
1374         }
1375         old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1376
1377         if (update_dot_dot) {
1378                 status = ocfs2_update_entry(old_inode, handle,
1379                                             &old_inode_dot_dot_res, new_dir);
1380                 old_dir->i_nlink--;
1381                 if (new_inode) {
1382                         new_inode->i_nlink--;
1383                 } else {
1384                         inc_nlink(new_dir);
1385                         mark_inode_dirty(new_dir);
1386                 }
1387         }
1388         mark_inode_dirty(old_dir);
1389         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1390         if (new_inode) {
1391                 mark_inode_dirty(new_inode);
1392                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1393         }
1394
1395         if (old_dir != new_dir) {
1396                 /* Keep the same times on both directories.*/
1397                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1398
1399                 /*
1400                  * This will also pick up the i_nlink change from the
1401                  * block above.
1402                  */
1403                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1404         }
1405
1406         if (old_dir_nlink != old_dir->i_nlink) {
1407                 if (!old_dir_bh) {
1408                         mlog(ML_ERROR, "need to change nlink for old dir "
1409                              "%llu from %d to %d but bh is NULL!\n",
1410                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1411                              (int)old_dir_nlink, old_dir->i_nlink);
1412                 } else {
1413                         struct ocfs2_dinode *fe;
1414                         status = ocfs2_journal_access_di(handle,
1415                                                          INODE_CACHE(old_dir),
1416                                                          old_dir_bh,
1417                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1418                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1419                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1420                         status = ocfs2_journal_dirty(handle, old_dir_bh);
1421                 }
1422         }
1423         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1424         status = 0;
1425 bail:
1426         if (rename_lock)
1427                 ocfs2_rename_unlock(osb);
1428
1429         if (handle)
1430                 ocfs2_commit_trans(osb, handle);
1431
1432         if (parents_locked)
1433                 ocfs2_double_unlock(old_dir, new_dir);
1434
1435         if (old_child_locked)
1436                 ocfs2_inode_unlock(old_inode, 1);
1437
1438         if (new_child_locked)
1439                 ocfs2_inode_unlock(new_inode, 1);
1440
1441         if (orphan_dir) {
1442                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1443                 ocfs2_inode_unlock(orphan_dir, 1);
1444                 mutex_unlock(&orphan_dir->i_mutex);
1445                 iput(orphan_dir);
1446         }
1447
1448         if (new_inode)
1449                 sync_mapping_buffers(old_inode->i_mapping);
1450
1451         if (new_inode)
1452                 iput(new_inode);
1453
1454         ocfs2_free_dir_lookup_result(&target_lookup_res);
1455         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1456         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1457         ocfs2_free_dir_lookup_result(&orphan_insert);
1458         ocfs2_free_dir_lookup_result(&target_insert);
1459
1460         brelse(newfe_bh);
1461         brelse(old_inode_bh);
1462         brelse(old_dir_bh);
1463         brelse(new_dir_bh);
1464
1465         mlog_exit(status);
1466
1467         return status;
1468 }
1469
1470 /*
1471  * we expect i_size = strlen(symname). Copy symname into the file
1472  * data, including the null terminator.
1473  */
1474 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1475                                      handle_t *handle,
1476                                      struct inode *inode,
1477                                      const char *symname)
1478 {
1479         struct buffer_head **bhs = NULL;
1480         const char *c;
1481         struct super_block *sb = osb->sb;
1482         u64 p_blkno, p_blocks;
1483         int virtual, blocks, status, i, bytes_left;
1484
1485         bytes_left = i_size_read(inode) + 1;
1486         /* we can't trust i_blocks because we're actually going to
1487          * write i_size + 1 bytes. */
1488         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1489
1490         mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
1491                         (unsigned long long)inode->i_blocks,
1492                         i_size_read(inode), blocks);
1493
1494         /* Sanity check -- make sure we're going to fit. */
1495         if (bytes_left >
1496             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1497                 status = -EIO;
1498                 mlog_errno(status);
1499                 goto bail;
1500         }
1501
1502         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1503         if (!bhs) {
1504                 status = -ENOMEM;
1505                 mlog_errno(status);
1506                 goto bail;
1507         }
1508
1509         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1510                                              NULL);
1511         if (status < 0) {
1512                 mlog_errno(status);
1513                 goto bail;
1514         }
1515
1516         /* links can never be larger than one cluster so we know this
1517          * is all going to be contiguous, but do a sanity check
1518          * anyway. */
1519         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1520                 status = -EIO;
1521                 mlog_errno(status);
1522                 goto bail;
1523         }
1524
1525         virtual = 0;
1526         while(bytes_left > 0) {
1527                 c = &symname[virtual * sb->s_blocksize];
1528
1529                 bhs[virtual] = sb_getblk(sb, p_blkno);
1530                 if (!bhs[virtual]) {
1531                         status = -ENOMEM;
1532                         mlog_errno(status);
1533                         goto bail;
1534                 }
1535                 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1536                                               bhs[virtual]);
1537
1538                 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1539                                               bhs[virtual],
1540                                               OCFS2_JOURNAL_ACCESS_CREATE);
1541                 if (status < 0) {
1542                         mlog_errno(status);
1543                         goto bail;
1544                 }
1545
1546                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1547
1548                 memcpy(bhs[virtual]->b_data, c,
1549                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1550                        bytes_left);
1551
1552                 status = ocfs2_journal_dirty(handle, bhs[virtual]);
1553                 if (status < 0) {
1554                         mlog_errno(status);
1555                         goto bail;
1556                 }
1557
1558                 virtual++;
1559                 p_blkno++;
1560                 bytes_left -= sb->s_blocksize;
1561         }
1562
1563         status = 0;
1564 bail:
1565
1566         if (bhs) {
1567                 for(i = 0; i < blocks; i++)
1568                         brelse(bhs[i]);
1569                 kfree(bhs);
1570         }
1571
1572         mlog_exit(status);
1573         return status;
1574 }
1575
1576 static int ocfs2_symlink(struct inode *dir,
1577                          struct dentry *dentry,
1578                          const char *symname)
1579 {
1580         int status, l, credits;
1581         u64 newsize;
1582         struct ocfs2_super *osb = NULL;
1583         struct inode *inode = NULL;
1584         struct super_block *sb;
1585         struct buffer_head *new_fe_bh = NULL;
1586         struct buffer_head *parent_fe_bh = NULL;
1587         struct ocfs2_dinode *fe = NULL;
1588         struct ocfs2_dinode *dirfe;
1589         handle_t *handle = NULL;
1590         struct ocfs2_alloc_context *inode_ac = NULL;
1591         struct ocfs2_alloc_context *data_ac = NULL;
1592         struct ocfs2_alloc_context *xattr_ac = NULL;
1593         int want_clusters = 0;
1594         int xattr_credits = 0;
1595         struct ocfs2_security_xattr_info si = {
1596                 .enable = 1,
1597         };
1598         int did_quota = 0, did_quota_inode = 0;
1599         struct ocfs2_dir_lookup_result lookup = { NULL, };
1600
1601         mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1602                    dentry, symname, dentry->d_name.len, dentry->d_name.name);
1603
1604         sb = dir->i_sb;
1605         osb = OCFS2_SB(sb);
1606
1607         l = strlen(symname) + 1;
1608
1609         credits = ocfs2_calc_symlink_credits(sb);
1610
1611         /* lock the parent directory */
1612         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1613         if (status < 0) {
1614                 if (status != -ENOENT)
1615                         mlog_errno(status);
1616                 return status;
1617         }
1618
1619         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1620         if (!ocfs2_read_links_count(dirfe)) {
1621                 /* can't make a file in a deleted directory. */
1622                 status = -ENOENT;
1623                 goto bail;
1624         }
1625
1626         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1627                                            dentry->d_name.len);
1628         if (status)
1629                 goto bail;
1630
1631         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1632                                               dentry->d_name.name,
1633                                               dentry->d_name.len, &lookup);
1634         if (status < 0) {
1635                 mlog_errno(status);
1636                 goto bail;
1637         }
1638
1639         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1640         if (status < 0) {
1641                 if (status != -ENOSPC)
1642                         mlog_errno(status);
1643                 goto bail;
1644         }
1645
1646         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1647         if (!inode) {
1648                 status = -ENOMEM;
1649                 mlog_errno(status);
1650                 goto bail;
1651         }
1652
1653         /* get security xattr */
1654         status = ocfs2_init_security_get(inode, dir, &si);
1655         if (status) {
1656                 if (status == -EOPNOTSUPP)
1657                         si.enable = 0;
1658                 else {
1659                         mlog_errno(status);
1660                         goto bail;
1661                 }
1662         }
1663
1664         /* calculate meta data/clusters for setting security xattr */
1665         if (si.enable) {
1666                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1667                                                   &xattr_credits, &xattr_ac);
1668                 if (status < 0) {
1669                         mlog_errno(status);
1670                         goto bail;
1671                 }
1672         }
1673
1674         /* don't reserve bitmap space for fast symlinks. */
1675         if (l > ocfs2_fast_symlink_chars(sb))
1676                 want_clusters += 1;
1677
1678         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1679         if (status < 0) {
1680                 if (status != -ENOSPC)
1681                         mlog_errno(status);
1682                 goto bail;
1683         }
1684
1685         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1686         if (IS_ERR(handle)) {
1687                 status = PTR_ERR(handle);
1688                 handle = NULL;
1689                 mlog_errno(status);
1690                 goto bail;
1691         }
1692
1693         /* We don't use standard VFS wrapper because we don't want vfs_dq_init
1694          * to be called. */
1695         if (sb_any_quota_active(osb->sb) &&
1696             osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
1697                 status = -EDQUOT;
1698                 goto bail;
1699         }
1700         did_quota_inode = 1;
1701
1702         status = ocfs2_mknod_locked(osb, dir, inode, dentry,
1703                                     0, &new_fe_bh, parent_fe_bh, handle,
1704                                     inode_ac);
1705         if (status < 0) {
1706                 mlog_errno(status);
1707                 goto bail;
1708         }
1709
1710         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1711         inode->i_rdev = 0;
1712         newsize = l - 1;
1713         if (l > ocfs2_fast_symlink_chars(sb)) {
1714                 u32 offset = 0;
1715
1716                 inode->i_op = &ocfs2_symlink_inode_operations;
1717                 if (vfs_dq_alloc_space_nodirty(inode,
1718                     ocfs2_clusters_to_bytes(osb->sb, 1))) {
1719                         status = -EDQUOT;
1720                         goto bail;
1721                 }
1722                 did_quota = 1;
1723                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1724                                               new_fe_bh,
1725                                               handle, data_ac, NULL,
1726                                               NULL);
1727                 if (status < 0) {
1728                         if (status != -ENOSPC && status != -EINTR) {
1729                                 mlog(ML_ERROR,
1730                                      "Failed to extend file to %llu\n",
1731                                      (unsigned long long)newsize);
1732                                 mlog_errno(status);
1733                                 status = -ENOSPC;
1734                         }
1735                         goto bail;
1736                 }
1737                 i_size_write(inode, newsize);
1738                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1739         } else {
1740                 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1741                 memcpy((char *) fe->id2.i_symlink, symname, l);
1742                 i_size_write(inode, newsize);
1743                 inode->i_blocks = 0;
1744         }
1745
1746         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1747         if (status < 0) {
1748                 mlog_errno(status);
1749                 goto bail;
1750         }
1751
1752         if (!ocfs2_inode_is_fast_symlink(inode)) {
1753                 status = ocfs2_create_symlink_data(osb, handle, inode,
1754                                                    symname);
1755                 if (status < 0) {
1756                         mlog_errno(status);
1757                         goto bail;
1758                 }
1759         }
1760
1761         if (si.enable) {
1762                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1763                                                  xattr_ac, data_ac);
1764                 if (status < 0) {
1765                         mlog_errno(status);
1766                         goto bail;
1767                 }
1768         }
1769
1770         status = ocfs2_add_entry(handle, dentry, inode,
1771                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
1772                                  &lookup);
1773         if (status < 0) {
1774                 mlog_errno(status);
1775                 goto bail;
1776         }
1777
1778         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1779         if (status) {
1780                 mlog_errno(status);
1781                 goto bail;
1782         }
1783
1784         insert_inode_hash(inode);
1785         dentry->d_op = &ocfs2_dentry_ops;
1786         d_instantiate(dentry, inode);
1787 bail:
1788         if (status < 0 && did_quota)
1789                 vfs_dq_free_space_nodirty(inode,
1790                                         ocfs2_clusters_to_bytes(osb->sb, 1));
1791         if (status < 0 && did_quota_inode)
1792                 vfs_dq_free_inode(inode);
1793         if (handle)
1794                 ocfs2_commit_trans(osb, handle);
1795
1796         ocfs2_inode_unlock(dir, 1);
1797
1798         brelse(new_fe_bh);
1799         brelse(parent_fe_bh);
1800         kfree(si.name);
1801         kfree(si.value);
1802         ocfs2_free_dir_lookup_result(&lookup);
1803         if (inode_ac)
1804                 ocfs2_free_alloc_context(inode_ac);
1805         if (data_ac)
1806                 ocfs2_free_alloc_context(data_ac);
1807         if (xattr_ac)
1808                 ocfs2_free_alloc_context(xattr_ac);
1809         if ((status < 0) && inode) {
1810                 clear_nlink(inode);
1811                 iput(inode);
1812         }
1813
1814         mlog_exit(status);
1815
1816         return status;
1817 }
1818
1819 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1820 {
1821         int status, namelen;
1822
1823         mlog_entry_void();
1824
1825         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1826                            (long long)blkno);
1827         if (namelen <= 0) {
1828                 if (namelen)
1829                         status = namelen;
1830                 else
1831                         status = -EINVAL;
1832                 mlog_errno(status);
1833                 goto bail;
1834         }
1835         if (namelen != OCFS2_ORPHAN_NAMELEN) {
1836                 status = -EINVAL;
1837                 mlog_errno(status);
1838                 goto bail;
1839         }
1840
1841         mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
1842              namelen);
1843
1844         status = 0;
1845 bail:
1846         mlog_exit(status);
1847         return status;
1848 }
1849
1850 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1851                                     struct inode **ret_orphan_dir,
1852                                     struct inode *inode,
1853                                     char *name,
1854                                     struct ocfs2_dir_lookup_result *lookup)
1855 {
1856         struct inode *orphan_dir_inode;
1857         struct buffer_head *orphan_dir_bh = NULL;
1858         int status = 0;
1859
1860         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
1861         if (status < 0) {
1862                 mlog_errno(status);
1863                 return status;
1864         }
1865
1866         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1867                                                        ORPHAN_DIR_SYSTEM_INODE,
1868                                                        osb->slot_num);
1869         if (!orphan_dir_inode) {
1870                 status = -ENOENT;
1871                 mlog_errno(status);
1872                 return status;
1873         }
1874
1875         mutex_lock(&orphan_dir_inode->i_mutex);
1876
1877         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1878         if (status < 0) {
1879                 mlog_errno(status);
1880                 goto leave;
1881         }
1882
1883         status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1884                                               orphan_dir_bh, name,
1885                                               OCFS2_ORPHAN_NAMELEN, lookup);
1886         if (status < 0) {
1887                 ocfs2_inode_unlock(orphan_dir_inode, 1);
1888
1889                 mlog_errno(status);
1890                 goto leave;
1891         }
1892
1893         *ret_orphan_dir = orphan_dir_inode;
1894
1895 leave:
1896         if (status) {
1897                 mutex_unlock(&orphan_dir_inode->i_mutex);
1898                 iput(orphan_dir_inode);
1899         }
1900
1901         brelse(orphan_dir_bh);
1902
1903         mlog_exit(status);
1904         return status;
1905 }
1906
1907 static int ocfs2_orphan_add(struct ocfs2_super *osb,
1908                             handle_t *handle,
1909                             struct inode *inode,
1910                             struct ocfs2_dinode *fe,
1911                             char *name,
1912                             struct ocfs2_dir_lookup_result *lookup,
1913                             struct inode *orphan_dir_inode)
1914 {
1915         struct buffer_head *orphan_dir_bh = NULL;
1916         int status = 0;
1917         struct ocfs2_dinode *orphan_fe;
1918
1919         mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
1920
1921         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
1922         if (status < 0) {
1923                 mlog_errno(status);
1924                 goto leave;
1925         }
1926
1927         status = ocfs2_journal_access_di(handle,
1928                                          INODE_CACHE(orphan_dir_inode),
1929                                          orphan_dir_bh,
1930                                          OCFS2_JOURNAL_ACCESS_WRITE);
1931         if (status < 0) {
1932                 mlog_errno(status);
1933                 goto leave;
1934         }
1935
1936         /* we're a cluster, and nlink can change on disk from
1937          * underneath us... */
1938         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
1939         if (S_ISDIR(inode->i_mode))
1940                 ocfs2_add_links_count(orphan_fe, 1);
1941         orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
1942
1943         status = ocfs2_journal_dirty(handle, orphan_dir_bh);
1944         if (status < 0) {
1945                 mlog_errno(status);
1946                 goto leave;
1947         }
1948
1949         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
1950                                    OCFS2_ORPHAN_NAMELEN, inode,
1951                                    OCFS2_I(inode)->ip_blkno,
1952                                    orphan_dir_bh, lookup);
1953         if (status < 0) {
1954                 mlog_errno(status);
1955                 goto leave;
1956         }
1957
1958         le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
1959
1960         /* Record which orphan dir our inode now resides
1961          * in. delete_inode will use this to determine which orphan
1962          * dir to lock. */
1963         fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
1964
1965         mlog(0, "Inode %llu orphaned in slot %d\n",
1966              (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);
1967
1968 leave:
1969         brelse(orphan_dir_bh);
1970
1971         mlog_exit(status);
1972         return status;
1973 }
1974
1975 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
1976 int ocfs2_orphan_del(struct ocfs2_super *osb,
1977                      handle_t *handle,
1978                      struct inode *orphan_dir_inode,
1979                      struct inode *inode,
1980                      struct buffer_head *orphan_dir_bh)
1981 {
1982         char name[OCFS2_ORPHAN_NAMELEN + 1];
1983         struct ocfs2_dinode *orphan_fe;
1984         int status = 0;
1985         struct ocfs2_dir_lookup_result lookup = { NULL, };
1986
1987         mlog_entry_void();
1988
1989         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
1990         if (status < 0) {
1991                 mlog_errno(status);
1992                 goto leave;
1993         }
1994
1995         mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
1996              name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
1997              OCFS2_ORPHAN_NAMELEN);
1998
1999         /* find it's spot in the orphan directory */
2000         status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
2001                                   &lookup);
2002         if (status) {
2003                 mlog_errno(status);
2004                 goto leave;
2005         }
2006
2007         /* remove it from the orphan directory */
2008         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2009         if (status < 0) {
2010                 mlog_errno(status);
2011                 goto leave;
2012         }
2013
2014         status = ocfs2_journal_access_di(handle,
2015                                          INODE_CACHE(orphan_dir_inode),
2016                                          orphan_dir_bh,
2017                                          OCFS2_JOURNAL_ACCESS_WRITE);
2018         if (status < 0) {
2019                 mlog_errno(status);
2020                 goto leave;
2021         }
2022
2023         /* do the i_nlink dance! :) */
2024         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2025         if (S_ISDIR(inode->i_mode))
2026                 ocfs2_add_links_count(orphan_fe, -1);
2027         orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
2028
2029         status = ocfs2_journal_dirty(handle, orphan_dir_bh);
2030         if (status < 0) {
2031                 mlog_errno(status);
2032                 goto leave;
2033         }
2034
2035 leave:
2036         ocfs2_free_dir_lookup_result(&lookup);
2037
2038         mlog_exit(status);
2039         return status;
2040 }
2041
2042 const struct inode_operations ocfs2_dir_iops = {
2043         .create         = ocfs2_create,
2044         .lookup         = ocfs2_lookup,
2045         .link           = ocfs2_link,
2046         .unlink         = ocfs2_unlink,
2047         .rmdir          = ocfs2_unlink,
2048         .symlink        = ocfs2_symlink,
2049         .mkdir          = ocfs2_mkdir,
2050         .mknod          = ocfs2_mknod,
2051         .rename         = ocfs2_rename,
2052         .setattr        = ocfs2_setattr,
2053         .getattr        = ocfs2_getattr,
2054         .permission     = ocfs2_permission,
2055         .setxattr       = generic_setxattr,
2056         .getxattr       = generic_getxattr,
2057         .listxattr      = ocfs2_listxattr,
2058         .removexattr    = generic_removexattr,
2059 };