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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(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)) {
 259                 status = -EMLINK;
 260                 goto leave;
 261         }
 262
 263         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
 264         if (!dirfe->i_links_count) {
 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                 le16_add_cpu(&dirfe->i_links_count, 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, inode_ac, &suballoc_bit,
 489                                        &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         fe->i_links_count = cpu_to_le16(inode->i_nlink);
 533
 534         fe->i_last_eb_blk = 0;
 535         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 536         le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
 537         fe->i_atime = fe->i_ctime = fe->i_mtime =
 538                 cpu_to_le64(CURRENT_TIME.tv_sec);
 539         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
 540                 cpu_to_le32(CURRENT_TIME.tv_nsec);
 541         fe->i_dtime = 0;
 542
 543         /*
 544          * If supported, directories start with inline data. If inline
 545          * isn't supported, but indexing is, we start them as indexed.
 546          */
 547         feat = le16_to_cpu(fe->i_dyn_features);
 548         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
 549                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
 550
 551                 fe->id2.i_data.id_count = cpu_to_le16(
 552                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
 553         } else {
 554                 fel = &fe->id2.i_list;
 555                 fel->l_tree_depth = 0;
 556                 fel->l_next_free_rec = 0;
 557                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
 558         }
 559
 560         status = ocfs2_journal_dirty(handle, *new_fe_bh);
 561         if (status < 0) {
 562                 mlog_errno(status);
 563                 goto leave;
 564         }
 565
 566         ocfs2_populate_inode(inode, fe, 1);
 567         ocfs2_inode_set_new(osb, inode);
 568         if (!ocfs2_mount_local(osb)) {
 569                 status = ocfs2_create_new_inode_locks(inode);
 570                 if (status < 0)
 571                         mlog_errno(status);
 572         }
 573
 574         status = 0; /* error in ocfs2_create_new_inode_locks is not
 575                      * critical */
 576
 577 leave:
 578         if (status < 0) {
 579                 if (*new_fe_bh) {
 580                         brelse(*new_fe_bh);
 581                         *new_fe_bh = NULL;
 582                 }
 583         }
 584
 585         mlog_exit(status);
 586         return status;
 587 }
 588
 589 static int ocfs2_mkdir(struct inode *dir,
 590                        struct dentry *dentry,
 591                        int mode)
 592 {
 593         int ret;
 594
 595         mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
 596                    dentry->d_name.len, dentry->d_name.name);
 597         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
 598         mlog_exit(ret);
 599
 600         return ret;
 601 }
 602
 603 static int ocfs2_create(struct inode *dir,
 604                         struct dentry *dentry,
 605                         int mode,
 606                         struct nameidata *nd)
 607 {
 608         int ret;
 609
 610         mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
 611                    dentry->d_name.len, dentry->d_name.name);
 612         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
 613         mlog_exit(ret);
 614
 615         return ret;
 616 }
 617
 618 static int ocfs2_link(struct dentry *old_dentry,
 619                       struct inode *dir,
 620                       struct dentry *dentry)
 621 {
 622         handle_t *handle;
 623         struct inode *inode = old_dentry->d_inode;
 624         int err;
 625         struct buffer_head *fe_bh = NULL;
 626         struct buffer_head *parent_fe_bh = NULL;
 627         struct ocfs2_dinode *fe = NULL;
 628         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 629         struct ocfs2_dir_lookup_result lookup = { NULL, };
 630
 631         mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
 632                    old_dentry->d_name.len, old_dentry->d_name.name,
 633                    dentry->d_name.len, dentry->d_name.name);
 634
 635         if (S_ISDIR(inode->i_mode))
 636                 return -EPERM;
 637
 638         err = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
 639         if (err < 0) {
 640                 if (err != -ENOENT)
 641                         mlog_errno(err);
 642                 return err;
 643         }
 644
 645         if (!dir->i_nlink) {
 646                 err = -ENOENT;
 647                 goto out;
 648         }
 649
 650         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 651                                         dentry->d_name.len);
 652         if (err)
 653                 goto out;
 654
 655         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 656                                            dentry->d_name.name,
 657                                            dentry->d_name.len, &lookup);
 658         if (err < 0) {
 659                 mlog_errno(err);
 660                 goto out;
 661         }
 662
 663         err = ocfs2_inode_lock(inode, &fe_bh, 1);
 664         if (err < 0) {
 665                 if (err != -ENOENT)
 666                         mlog_errno(err);
 667                 goto out;
 668         }
 669
 670         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 671         if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) {
 672                 err = -EMLINK;
 673                 goto out_unlock_inode;
 674         }
 675
 676         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
 677         if (IS_ERR(handle)) {
 678                 err = PTR_ERR(handle);
 679                 handle = NULL;
 680                 mlog_errno(err);
 681                 goto out_unlock_inode;
 682         }
 683
 684         err = ocfs2_journal_access_di(handle, inode, fe_bh,
 685                                       OCFS2_JOURNAL_ACCESS_WRITE);
 686         if (err < 0) {
 687                 mlog_errno(err);
 688                 goto out_commit;
 689         }
 690
 691         inc_nlink(inode);
 692         inode->i_ctime = CURRENT_TIME;
 693         fe->i_links_count = cpu_to_le16(inode->i_nlink);
 694         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 695         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 696
 697         err = ocfs2_journal_dirty(handle, fe_bh);
 698         if (err < 0) {
 699                 le16_add_cpu(&fe->i_links_count, -1);
 700                 drop_nlink(inode);
 701                 mlog_errno(err);
 702                 goto out_commit;
 703         }
 704
 705         err = ocfs2_add_entry(handle, dentry, inode,
 706                               OCFS2_I(inode)->ip_blkno,
 707                               parent_fe_bh, &lookup);
 708         if (err) {
 709                 le16_add_cpu(&fe->i_links_count, -1);
 710                 drop_nlink(inode);
 711                 mlog_errno(err);
 712                 goto out_commit;
 713         }
 714
 715         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
 716         if (err) {
 717                 mlog_errno(err);
 718                 goto out_commit;
 719         }
 720
 721         atomic_inc(&inode->i_count);
 722         dentry->d_op = &ocfs2_dentry_ops;
 723         d_instantiate(dentry, inode);
 724
 725 out_commit:
 726         ocfs2_commit_trans(osb, handle);
 727 out_unlock_inode:
 728         ocfs2_inode_unlock(inode, 1);
 729
 730 out:
 731         ocfs2_inode_unlock(dir, 1);
 732
 733         brelse(fe_bh);
 734         brelse(parent_fe_bh);
 735
 736         ocfs2_free_dir_lookup_result(&lookup);
 737
 738         mlog_exit(err);
 739
 740         return err;
 741 }
 742
 743 /*
 744  * Takes and drops an exclusive lock on the given dentry. This will
 745  * force other nodes to drop it.
 746  */
 747 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 748 {
 749         int ret;
 750
 751         ret = ocfs2_dentry_lock(dentry, 1);
 752         if (ret)
 753                 mlog_errno(ret);
 754         else
 755                 ocfs2_dentry_unlock(dentry, 1);
 756
 757         return ret;
 758 }
 759
 760 static inline int inode_is_unlinkable(struct inode *inode)
 761 {
 762         if (S_ISDIR(inode->i_mode)) {
 763                 if (inode->i_nlink == 2)
 764                         return 1;
 765                 return 0;
 766         }
 767
 768         if (inode->i_nlink == 1)
 769                 return 1;
 770         return 0;
 771 }
 772
 773 static int ocfs2_unlink(struct inode *dir,
 774                         struct dentry *dentry)
 775 {
 776         int status;
 777         int child_locked = 0;
 778         struct inode *inode = dentry->d_inode;
 779         struct inode *orphan_dir = NULL;
 780         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 781         u64 blkno;
 782         struct ocfs2_dinode *fe = NULL;
 783         struct buffer_head *fe_bh = NULL;
 784         struct buffer_head *parent_node_bh = NULL;
 785         handle_t *handle = NULL;
 786         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 787         struct ocfs2_dir_lookup_result lookup = { NULL, };
 788         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
 789
 790         mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
 791                    dentry->d_name.len, dentry->d_name.name);
 792
 793         BUG_ON(dentry->d_parent->d_inode != dir);
 794
 795         mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);
 796
 797         if (inode == osb->root_inode) {
 798                 mlog(0, "Cannot delete the root directory\n");
 799                 return -EPERM;
 800         }
 801
 802         status = ocfs2_inode_lock(dir, &parent_node_bh, 1);
 803         if (status < 0) {
 804                 if (status != -ENOENT)
 805                         mlog_errno(status);
 806                 return status;
 807         }
 808
 809         status = ocfs2_find_files_on_disk(dentry->d_name.name,
 810                                           dentry->d_name.len, &blkno, dir,
 811                                           &lookup);
 812         if (status < 0) {
 813                 if (status != -ENOENT)
 814                         mlog_errno(status);
 815                 goto leave;
 816         }
 817
 818         if (OCFS2_I(inode)->ip_blkno != blkno) {
 819                 status = -ENOENT;
 820
 821                 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
 822                      (unsigned long long)OCFS2_I(inode)->ip_blkno,
 823                      (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
 824                 goto leave;
 825         }
 826
 827         status = ocfs2_inode_lock(inode, &fe_bh, 1);
 828         if (status < 0) {
 829                 if (status != -ENOENT)
 830                         mlog_errno(status);
 831                 goto leave;
 832         }
 833         child_locked = 1;
 834
 835         if (S_ISDIR(inode->i_mode)) {
 836                 if (!ocfs2_empty_dir(inode)) {
 837                         status = -ENOTEMPTY;
 838                         goto leave;
 839                 } else if (inode->i_nlink != 2) {
 840                         status = -ENOTEMPTY;
 841                         goto leave;
 842                 }
 843         }
 844
 845         status = ocfs2_remote_dentry_delete(dentry);
 846         if (status < 0) {
 847                 /* This remote delete should succeed under all normal
 848                  * circumstances. */
 849                 mlog_errno(status);
 850                 goto leave;
 851         }
 852
 853         if (inode_is_unlinkable(inode)) {
 854                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, inode,
 855                                                   orphan_name, &orphan_insert);
 856                 if (status < 0) {
 857                         mlog_errno(status);
 858                         goto leave;
 859                 }
 860         }
 861
 862         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
 863         if (IS_ERR(handle)) {
 864                 status = PTR_ERR(handle);
 865                 handle = NULL;
 866                 mlog_errno(status);
 867                 goto leave;
 868         }
 869
 870         status = ocfs2_journal_access_di(handle, inode, fe_bh,
 871                                          OCFS2_JOURNAL_ACCESS_WRITE);
 872         if (status < 0) {
 873                 mlog_errno(status);
 874                 goto leave;
 875         }
 876
 877         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 878
 879         if (inode_is_unlinkable(inode)) {
 880                 status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name,
 881                                           &orphan_insert, orphan_dir);
 882                 if (status < 0) {
 883                         mlog_errno(status);
 884                         goto leave;
 885                 }
 886         }
 887
 888         /* delete the name from the parent dir */
 889         status = ocfs2_delete_entry(handle, dir, &lookup);
 890         if (status < 0) {
 891                 mlog_errno(status);
 892                 goto leave;
 893         }
 894
 895         if (S_ISDIR(inode->i_mode))
 896                 drop_nlink(inode);
 897         drop_nlink(inode);
 898         fe->i_links_count = cpu_to_le16(inode->i_nlink);
 899
 900         status = ocfs2_journal_dirty(handle, fe_bh);
 901         if (status < 0) {
 902                 mlog_errno(status);
 903                 goto leave;
 904         }
 905
 906         dir->i_ctime = dir->i_mtime = CURRENT_TIME;
 907         if (S_ISDIR(inode->i_mode))
 908                 drop_nlink(dir);
 909
 910         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
 911         if (status < 0) {
 912                 mlog_errno(status);
 913                 if (S_ISDIR(inode->i_mode))
 914                         inc_nlink(dir);
 915         }
 916
 917 leave:
 918         if (handle)
 919                 ocfs2_commit_trans(osb, handle);
 920
 921         if (child_locked)
 922                 ocfs2_inode_unlock(inode, 1);
 923
 924         ocfs2_inode_unlock(dir, 1);
 925
 926         if (orphan_dir) {
 927                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
 928                 ocfs2_inode_unlock(orphan_dir, 1);
 929                 mutex_unlock(&orphan_dir->i_mutex);
 930                 iput(orphan_dir);
 931         }
 932
 933         brelse(fe_bh);
 934         brelse(parent_node_bh);
 935
 936         ocfs2_free_dir_lookup_result(&orphan_insert);
 937         ocfs2_free_dir_lookup_result(&lookup);
 938
 939         mlog_exit(status);
 940
 941         return status;
 942 }
 943
 944 /*
 945  * The only place this should be used is rename!
 946  * if they have the same id, then the 1st one is the only one locked.
 947  */
 948 static int ocfs2_double_lock(struct ocfs2_super *osb,
 949                              struct buffer_head **bh1,
 950                              struct inode *inode1,
 951                              struct buffer_head **bh2,
 952                              struct inode *inode2)
 953 {
 954         int status;
 955         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
 956         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
 957         struct buffer_head **tmpbh;
 958         struct inode *tmpinode;
 959
 960         mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
 961                    (unsigned long long)oi1->ip_blkno,
 962                    (unsigned long long)oi2->ip_blkno);
 963
 964         if (*bh1)
 965                 *bh1 = NULL;
 966         if (*bh2)
 967                 *bh2 = NULL;
 968
 969         /* we always want to lock the one with the lower lockid first. */
 970         if (oi1->ip_blkno != oi2->ip_blkno) {
 971                 if (oi1->ip_blkno < oi2->ip_blkno) {
 972                         /* switch id1 and id2 around */
 973                         mlog(0, "switching them around...\n");
 974                         tmpbh = bh2;
 975                         bh2 = bh1;
 976                         bh1 = tmpbh;
 977
 978                         tmpinode = inode2;
 979                         inode2 = inode1;
 980                         inode1 = tmpinode;
 981                 }
 982                 /* lock id2 */
 983                 status = ocfs2_inode_lock(inode2, bh2, 1);
 984                 if (status < 0) {
 985                         if (status != -ENOENT)
 986                                 mlog_errno(status);
 987                         goto bail;
 988                 }
 989         }
 990
 991         /* lock id1 */
 992         status = ocfs2_inode_lock(inode1, bh1, 1);
 993         if (status < 0) {
 994                 /*
 995                  * An error return must mean that no cluster locks
 996                  * were held on function exit.
 997                  */
 998                 if (oi1->ip_blkno != oi2->ip_blkno)
 999                         ocfs2_inode_unlock(inode2, 1);
1000
1001                 if (status != -ENOENT)
1002                         mlog_errno(status);
1003         }
1004
1005 bail:
1006         mlog_exit(status);
1007         return status;
1008 }
1009
1010 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1011 {
1012         ocfs2_inode_unlock(inode1, 1);
1013
1014         if (inode1 != inode2)
1015                 ocfs2_inode_unlock(inode2, 1);
1016 }
1017
1018 static int ocfs2_rename(struct inode *old_dir,
1019                         struct dentry *old_dentry,
1020                         struct inode *new_dir,
1021                         struct dentry *new_dentry)
1022 {
1023         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1024         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1025         struct inode *old_inode = old_dentry->d_inode;
1026         struct inode *new_inode = new_dentry->d_inode;
1027         struct inode *orphan_dir = NULL;
1028         struct ocfs2_dinode *newfe = NULL;
1029         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1030         struct buffer_head *orphan_entry_bh = NULL;
1031         struct buffer_head *newfe_bh = NULL;
1032         struct buffer_head *old_inode_bh = NULL;
1033         struct buffer_head *insert_entry_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(old_inode, &old_inode_bh, 1);
1111         if (status < 0) {
1112                 if (status != -ENOENT)
1113                         mlog_errno(status);
1114                 goto bail;
1115         }
1116         old_child_locked = 1;
1117
1118         status = ocfs2_remote_dentry_delete(old_dentry);
1119         if (status < 0) {
1120                 mlog_errno(status);
1121                 goto bail;
1122         }
1123
1124         if (S_ISDIR(old_inode->i_mode)) {
1125                 u64 old_inode_parent;
1126
1127                 update_dot_dot = 1;
1128                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1129                                                   old_inode,
1130                                                   &old_inode_dot_dot_res);
1131                 if (status) {
1132                         status = -EIO;
1133                         goto bail;
1134                 }
1135
1136                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1137                         status = -EIO;
1138                         goto bail;
1139                 }
1140
1141                 if (!new_inode && new_dir != old_dir &&
1142                     new_dir->i_nlink >= OCFS2_LINK_MAX) {
1143                         status = -EMLINK;
1144                         goto bail;
1145                 }
1146         }
1147
1148         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1149                                             old_dentry->d_name.len,
1150                                             &old_de_ino);
1151         if (status) {
1152                 status = -ENOENT;
1153                 goto bail;
1154         }
1155
1156         /*
1157          *  Check for inode number is _not_ due to possible IO errors.
1158          *  We might rmdir the source, keep it as pwd of some process
1159          *  and merrily kill the link to whatever was created under the
1160          *  same name. Goodbye sticky bit ;-<
1161          */
1162         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1163                 status = -ENOENT;
1164                 goto bail;
1165         }
1166
1167         /* check if the target already exists (in which case we need
1168          * to delete it */
1169         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1170                                           new_dentry->d_name.len,
1171                                           &newfe_blkno, new_dir,
1172                                           &target_lookup_res);
1173         /* The only error we allow here is -ENOENT because the new
1174          * file not existing is perfectly valid. */
1175         if ((status < 0) && (status != -ENOENT)) {
1176                 /* If we cannot find the file specified we should just */
1177                 /* return the error... */
1178                 mlog_errno(status);
1179                 goto bail;
1180         }
1181         if (status == 0)
1182                 target_exists = 1;
1183
1184         if (!target_exists && new_inode) {
1185                 /*
1186                  * Target was unlinked by another node while we were
1187                  * waiting to get to ocfs2_rename(). There isn't
1188                  * anything we can do here to help the situation, so
1189                  * bubble up the appropriate error.
1190                  */
1191                 status = -ENOENT;
1192                 goto bail;
1193         }
1194
1195         /* In case we need to overwrite an existing file, we blow it
1196          * away first */
1197         if (target_exists) {
1198                 /* VFS didn't think there existed an inode here, but
1199                  * someone else in the cluster must have raced our
1200                  * rename to create one. Today we error cleanly, in
1201                  * the future we should consider calling iget to build
1202                  * a new struct inode for this entry. */
1203                 if (!new_inode) {
1204                         status = -EACCES;
1205
1206                         mlog(0, "We found an inode for name %.*s but VFS "
1207                              "didn't give us one.\n", new_dentry->d_name.len,
1208                              new_dentry->d_name.name);
1209                         goto bail;
1210                 }
1211
1212                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1213                         status = -EACCES;
1214
1215                         mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1216                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1217                              (unsigned long long)newfe_blkno,
1218                              OCFS2_I(new_inode)->ip_flags);
1219                         goto bail;
1220                 }
1221
1222                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1223                 if (status < 0) {
1224                         if (status != -ENOENT)
1225                                 mlog_errno(status);
1226                         goto bail;
1227                 }
1228                 new_child_locked = 1;
1229
1230                 status = ocfs2_remote_dentry_delete(new_dentry);
1231                 if (status < 0) {
1232                         mlog_errno(status);
1233                         goto bail;
1234                 }
1235
1236                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1237
1238                 mlog(0, "aha rename over existing... new_blkno=%llu "
1239                      "newfebh=%p bhblocknr=%llu\n",
1240                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1241                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1242
1243                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1244                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1245                                                           new_inode,
1246                                                           orphan_name,
1247                                                           &orphan_insert);
1248                         if (status < 0) {
1249                                 mlog_errno(status);
1250                                 goto bail;
1251                         }
1252                 }
1253         } else {
1254                 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1255
1256                 status = ocfs2_check_dir_for_entry(new_dir,
1257                                                    new_dentry->d_name.name,
1258                                                    new_dentry->d_name.len);
1259                 if (status)
1260                         goto bail;
1261
1262                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1263                                                       new_dentry->d_name.name,
1264                                                       new_dentry->d_name.len,
1265                                                       &target_insert);
1266                 if (status < 0) {
1267                         mlog_errno(status);
1268                         goto bail;
1269                 }
1270         }
1271
1272         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1273         if (IS_ERR(handle)) {
1274                 status = PTR_ERR(handle);
1275                 handle = NULL;
1276                 mlog_errno(status);
1277                 goto bail;
1278         }
1279
1280         if (target_exists) {
1281                 if (S_ISDIR(new_inode->i_mode)) {
1282                         if (!ocfs2_empty_dir(new_inode) ||
1283                             new_inode->i_nlink != 2) {
1284                                 status = -ENOTEMPTY;
1285                                 goto bail;
1286                         }
1287                 }
1288                 status = ocfs2_journal_access_di(handle, new_inode, newfe_bh,
1289                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1290                 if (status < 0) {
1291                         mlog_errno(status);
1292                         goto bail;
1293                 }
1294
1295                 if (S_ISDIR(new_inode->i_mode) ||
1296                     (newfe->i_links_count == cpu_to_le16(1))){
1297                         status = ocfs2_orphan_add(osb, handle, new_inode,
1298                                                   newfe, orphan_name,
1299                                                   &orphan_insert, orphan_dir);
1300                         if (status < 0) {
1301                                 mlog_errno(status);
1302                                 goto bail;
1303                         }
1304                 }
1305
1306                 /* change the dirent to point to the correct inode */
1307                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1308                                             old_inode);
1309                 if (status < 0) {
1310                         mlog_errno(status);
1311                         goto bail;
1312                 }
1313                 new_dir->i_version++;
1314
1315                 if (S_ISDIR(new_inode->i_mode))
1316                         newfe->i_links_count = 0;
1317                 else
1318                         le16_add_cpu(&newfe->i_links_count, -1);
1319
1320                 status = ocfs2_journal_dirty(handle, newfe_bh);
1321                 if (status < 0) {
1322                         mlog_errno(status);
1323                         goto bail;
1324                 }
1325         } else {
1326                 /* if the name was not found in new_dir, add it now */
1327                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1328                                          OCFS2_I(old_inode)->ip_blkno,
1329                                          new_dir_bh, &target_insert);
1330         }
1331
1332         old_inode->i_ctime = CURRENT_TIME;
1333         mark_inode_dirty(old_inode);
1334
1335         status = ocfs2_journal_access_di(handle, old_inode, old_inode_bh,
1336                                          OCFS2_JOURNAL_ACCESS_WRITE);
1337         if (status >= 0) {
1338                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1339
1340                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1341                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1342
1343                 status = ocfs2_journal_dirty(handle, old_inode_bh);
1344                 if (status < 0)
1345                         mlog_errno(status);
1346         } else
1347                 mlog_errno(status);
1348
1349         /*
1350          * Now that the name has been added to new_dir, remove the old name.
1351          *
1352          * We don't keep any directory entry context around until now
1353          * because the insert might have changed the type of directory
1354          * we're dealing with.
1355          */
1356         status = ocfs2_find_entry(old_dentry->d_name.name,
1357                                   old_dentry->d_name.len, old_dir,
1358                                   &old_entry_lookup);
1359         if (status)
1360                 goto bail;
1361
1362         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1363         if (status < 0) {
1364                 mlog_errno(status);
1365                 goto bail;
1366         }
1367
1368         if (new_inode) {
1369                 new_inode->i_nlink--;
1370                 new_inode->i_ctime = CURRENT_TIME;
1371         }
1372         old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1373
1374         if (update_dot_dot) {
1375                 status = ocfs2_update_entry(old_inode, handle,
1376                                             &old_inode_dot_dot_res, new_dir);
1377                 old_dir->i_nlink--;
1378                 if (new_inode) {
1379                         new_inode->i_nlink--;
1380                 } else {
1381                         inc_nlink(new_dir);
1382                         mark_inode_dirty(new_dir);
1383                 }
1384         }
1385         mark_inode_dirty(old_dir);
1386         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1387         if (new_inode) {
1388                 mark_inode_dirty(new_inode);
1389                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1390         }
1391
1392         if (old_dir != new_dir) {
1393                 /* Keep the same times on both directories.*/
1394                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1395
1396                 /*
1397                  * This will also pick up the i_nlink change from the
1398                  * block above.
1399                  */
1400                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1401         }
1402
1403         if (old_dir_nlink != old_dir->i_nlink) {
1404                 if (!old_dir_bh) {
1405                         mlog(ML_ERROR, "need to change nlink for old dir "
1406                              "%llu from %d to %d but bh is NULL!\n",
1407                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1408                              (int)old_dir_nlink, old_dir->i_nlink);
1409                 } else {
1410                         struct ocfs2_dinode *fe;
1411                         status = ocfs2_journal_access_di(handle, old_dir,
1412                                                          old_dir_bh,
1413                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1414                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1415                         fe->i_links_count = cpu_to_le16(old_dir->i_nlink);
1416                         status = ocfs2_journal_dirty(handle, old_dir_bh);
1417                 }
1418         }
1419
1420         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1421         status = 0;
1422 bail:
1423         if (rename_lock)
1424                 ocfs2_rename_unlock(osb);
1425
1426         if (handle)
1427                 ocfs2_commit_trans(osb, handle);
1428
1429         if (parents_locked)
1430                 ocfs2_double_unlock(old_dir, new_dir);
1431
1432         if (old_child_locked)
1433                 ocfs2_inode_unlock(old_inode, 1);
1434
1435         if (new_child_locked)
1436                 ocfs2_inode_unlock(new_inode, 1);
1437
1438         if (orphan_dir) {
1439                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1440                 ocfs2_inode_unlock(orphan_dir, 1);
1441                 mutex_unlock(&orphan_dir->i_mutex);
1442                 iput(orphan_dir);
1443         }
1444
1445         if (new_inode)
1446                 sync_mapping_buffers(old_inode->i_mapping);
1447
1448         if (new_inode)
1449                 iput(new_inode);
1450
1451         ocfs2_free_dir_lookup_result(&target_lookup_res);
1452         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1453         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1454         ocfs2_free_dir_lookup_result(&orphan_insert);
1455         ocfs2_free_dir_lookup_result(&target_insert);
1456
1457         brelse(newfe_bh);
1458         brelse(old_inode_bh);
1459         brelse(old_dir_bh);
1460         brelse(new_dir_bh);
1461         brelse(orphan_entry_bh);
1462         brelse(insert_entry_bh);
1463
1464         mlog_exit(status);
1465
1466         return status;
1467 }
1468
1469 /*
1470  * we expect i_size = strlen(symname). Copy symname into the file
1471  * data, including the null terminator.
1472  */
1473 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1474                                      handle_t *handle,
1475                                      struct inode *inode,
1476                                      const char *symname)
1477 {
1478         struct buffer_head **bhs = NULL;
1479         const char *c;
1480         struct super_block *sb = osb->sb;
1481         u64 p_blkno, p_blocks;
1482         int virtual, blocks, status, i, bytes_left;
1483
1484         bytes_left = i_size_read(inode) + 1;
1485         /* we can't trust i_blocks because we're actually going to
1486          * write i_size + 1 bytes. */
1487         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1488
1489         mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
1490                         (unsigned long long)inode->i_blocks,
1491                         i_size_read(inode), blocks);
1492
1493         /* Sanity check -- make sure we're going to fit. */
1494         if (bytes_left >
1495             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1496                 status = -EIO;
1497                 mlog_errno(status);
1498                 goto bail;
1499         }
1500
1501         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1502         if (!bhs) {
1503                 status = -ENOMEM;
1504                 mlog_errno(status);
1505                 goto bail;
1506         }
1507
1508         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1509                                              NULL);
1510         if (status < 0) {
1511                 mlog_errno(status);
1512                 goto bail;
1513         }
1514
1515         /* links can never be larger than one cluster so we know this
1516          * is all going to be contiguous, but do a sanity check
1517          * anyway. */
1518         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1519                 status = -EIO;
1520                 mlog_errno(status);
1521                 goto bail;
1522         }
1523
1524         virtual = 0;
1525         while(bytes_left > 0) {
1526                 c = &symname[virtual * sb->s_blocksize];
1527
1528                 bhs[virtual] = sb_getblk(sb, p_blkno);
1529                 if (!bhs[virtual]) {
1530                         status = -ENOMEM;
1531                         mlog_errno(status);
1532                         goto bail;
1533                 }
1534                 ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]);
1535
1536                 status = ocfs2_journal_access(handle, inode, bhs[virtual],
1537                                               OCFS2_JOURNAL_ACCESS_CREATE);
1538                 if (status < 0) {
1539                         mlog_errno(status);
1540                         goto bail;
1541                 }
1542
1543                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1544
1545                 memcpy(bhs[virtual]->b_data, c,
1546                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1547                        bytes_left);
1548
1549                 status = ocfs2_journal_dirty(handle, bhs[virtual]);
1550                 if (status < 0) {
1551                         mlog_errno(status);
1552                         goto bail;
1553                 }
1554
1555                 virtual++;
1556                 p_blkno++;
1557                 bytes_left -= sb->s_blocksize;
1558         }
1559
1560         status = 0;
1561 bail:
1562
1563         if (bhs) {
1564                 for(i = 0; i < blocks; i++)
1565                         brelse(bhs[i]);
1566                 kfree(bhs);
1567         }
1568
1569         mlog_exit(status);
1570         return status;
1571 }
1572
1573 static int ocfs2_symlink(struct inode *dir,
1574                          struct dentry *dentry,
1575                          const char *symname)
1576 {
1577         int status, l, credits;
1578         u64 newsize;
1579         struct ocfs2_super *osb = NULL;
1580         struct inode *inode = NULL;
1581         struct super_block *sb;
1582         struct buffer_head *new_fe_bh = NULL;
1583         struct buffer_head *parent_fe_bh = NULL;
1584         struct ocfs2_dinode *fe = NULL;
1585         struct ocfs2_dinode *dirfe;
1586         handle_t *handle = NULL;
1587         struct ocfs2_alloc_context *inode_ac = NULL;
1588         struct ocfs2_alloc_context *data_ac = NULL;
1589         struct ocfs2_alloc_context *xattr_ac = NULL;
1590         int want_clusters = 0;
1591         int xattr_credits = 0;
1592         struct ocfs2_security_xattr_info si = {
1593                 .enable = 1,
1594         };
1595         int did_quota = 0, did_quota_inode = 0;
1596         struct ocfs2_dir_lookup_result lookup = { NULL, };
1597
1598         mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1599                    dentry, symname, dentry->d_name.len, dentry->d_name.name);
1600
1601         sb = dir->i_sb;
1602         osb = OCFS2_SB(sb);
1603
1604         l = strlen(symname) + 1;
1605
1606         credits = ocfs2_calc_symlink_credits(sb);
1607
1608         /* lock the parent directory */
1609         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1610         if (status < 0) {
1611                 if (status != -ENOENT)
1612                         mlog_errno(status);
1613                 return status;
1614         }
1615
1616         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1617         if (!dirfe->i_links_count) {
1618                 /* can't make a file in a deleted directory. */
1619                 status = -ENOENT;
1620                 goto bail;
1621         }
1622
1623         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1624                                            dentry->d_name.len);
1625         if (status)
1626                 goto bail;
1627
1628         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1629                                               dentry->d_name.name,
1630                                               dentry->d_name.len, &lookup);
1631         if (status < 0) {
1632                 mlog_errno(status);
1633                 goto bail;
1634         }
1635
1636         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1637         if (status < 0) {
1638                 if (status != -ENOSPC)
1639                         mlog_errno(status);
1640                 goto bail;
1641         }
1642
1643         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1644         if (!inode) {
1645                 status = -ENOMEM;
1646                 mlog_errno(status);
1647                 goto bail;
1648         }
1649
1650         /* get security xattr */
1651         status = ocfs2_init_security_get(inode, dir, &si);
1652         if (status) {
1653                 if (status == -EOPNOTSUPP)
1654                         si.enable = 0;
1655                 else {
1656                         mlog_errno(status);
1657                         goto bail;
1658                 }
1659         }
1660
1661         /* calculate meta data/clusters for setting security xattr */
1662         if (si.enable) {
1663                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1664                                                   &xattr_credits, &xattr_ac);
1665                 if (status < 0) {
1666                         mlog_errno(status);
1667                         goto bail;
1668                 }
1669         }
1670
1671         /* don't reserve bitmap space for fast symlinks. */
1672         if (l > ocfs2_fast_symlink_chars(sb))
1673                 want_clusters += 1;
1674
1675         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1676         if (status < 0) {
1677                 if (status != -ENOSPC)
1678                         mlog_errno(status);
1679                 goto bail;
1680         }
1681
1682         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1683         if (IS_ERR(handle)) {
1684                 status = PTR_ERR(handle);
1685                 handle = NULL;
1686                 mlog_errno(status);
1687                 goto bail;
1688         }
1689
1690         /* We don't use standard VFS wrapper because we don't want vfs_dq_init
1691          * to be called. */
1692         if (sb_any_quota_active(osb->sb) &&
1693             osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
1694                 status = -EDQUOT;
1695                 goto bail;
1696         }
1697         did_quota_inode = 1;
1698
1699         status = ocfs2_mknod_locked(osb, dir, inode, dentry,
1700                                     0, &new_fe_bh, parent_fe_bh, handle,
1701                                     inode_ac);
1702         if (status < 0) {
1703                 mlog_errno(status);
1704                 goto bail;
1705         }
1706
1707         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1708         inode->i_rdev = 0;
1709         newsize = l - 1;
1710         if (l > ocfs2_fast_symlink_chars(sb)) {
1711                 u32 offset = 0;
1712
1713                 inode->i_op = &ocfs2_symlink_inode_operations;
1714                 if (vfs_dq_alloc_space_nodirty(inode,
1715                     ocfs2_clusters_to_bytes(osb->sb, 1))) {
1716                         status = -EDQUOT;
1717                         goto bail;
1718                 }
1719                 did_quota = 1;
1720                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1721                                               new_fe_bh,
1722                                               handle, data_ac, NULL,
1723                                               NULL);
1724                 if (status < 0) {
1725                         if (status != -ENOSPC && status != -EINTR) {
1726                                 mlog(ML_ERROR,
1727                                      "Failed to extend file to %llu\n",
1728                                      (unsigned long long)newsize);
1729                                 mlog_errno(status);
1730                                 status = -ENOSPC;
1731                         }
1732                         goto bail;
1733                 }
1734                 i_size_write(inode, newsize);
1735                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1736         } else {
1737                 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1738                 memcpy((char *) fe->id2.i_symlink, symname, l);
1739                 i_size_write(inode, newsize);
1740                 inode->i_blocks = 0;
1741         }
1742
1743         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1744         if (status < 0) {
1745                 mlog_errno(status);
1746                 goto bail;
1747         }
1748
1749         if (!ocfs2_inode_is_fast_symlink(inode)) {
1750                 status = ocfs2_create_symlink_data(osb, handle, inode,
1751                                                    symname);
1752                 if (status < 0) {
1753                         mlog_errno(status);
1754                         goto bail;
1755                 }
1756         }
1757
1758         if (si.enable) {
1759                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1760                                                  xattr_ac, data_ac);
1761                 if (status < 0) {
1762                         mlog_errno(status);
1763                         goto bail;
1764                 }
1765         }
1766
1767         status = ocfs2_add_entry(handle, dentry, inode,
1768                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
1769                                  &lookup);
1770         if (status < 0) {
1771                 mlog_errno(status);
1772                 goto bail;
1773         }
1774
1775         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1776         if (status) {
1777                 mlog_errno(status);
1778                 goto bail;
1779         }
1780
1781         insert_inode_hash(inode);
1782         dentry->d_op = &ocfs2_dentry_ops;
1783         d_instantiate(dentry, inode);
1784 bail:
1785         if (status < 0 && did_quota)
1786                 vfs_dq_free_space_nodirty(inode,
1787                                         ocfs2_clusters_to_bytes(osb->sb, 1));
1788         if (status < 0 && did_quota_inode)
1789                 vfs_dq_free_inode(inode);
1790         if (handle)
1791                 ocfs2_commit_trans(osb, handle);
1792
1793         ocfs2_inode_unlock(dir, 1);
1794
1795         brelse(new_fe_bh);
1796         brelse(parent_fe_bh);
1797         kfree(si.name);
1798         kfree(si.value);
1799         ocfs2_free_dir_lookup_result(&lookup);
1800         if (inode_ac)
1801                 ocfs2_free_alloc_context(inode_ac);
1802         if (data_ac)
1803                 ocfs2_free_alloc_context(data_ac);
1804         if (xattr_ac)
1805                 ocfs2_free_alloc_context(xattr_ac);
1806         if ((status < 0) && inode) {
1807                 clear_nlink(inode);
1808                 iput(inode);
1809         }
1810
1811         mlog_exit(status);
1812
1813         return status;
1814 }
1815
1816 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1817 {
1818         int status, namelen;
1819
1820         mlog_entry_void();
1821
1822         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1823                            (long long)blkno);
1824         if (namelen <= 0) {
1825                 if (namelen)
1826                         status = namelen;
1827                 else
1828                         status = -EINVAL;
1829                 mlog_errno(status);
1830                 goto bail;
1831         }
1832         if (namelen != OCFS2_ORPHAN_NAMELEN) {
1833                 status = -EINVAL;
1834                 mlog_errno(status);
1835                 goto bail;
1836         }
1837
1838         mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
1839              namelen);
1840
1841         status = 0;
1842 bail:
1843         mlog_exit(status);
1844         return status;
1845 }
1846
1847 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1848                                     struct inode **ret_orphan_dir,
1849                                     struct inode *inode,
1850                                     char *name,
1851                                     struct ocfs2_dir_lookup_result *lookup)
1852 {
1853         struct inode *orphan_dir_inode;
1854         struct buffer_head *orphan_dir_bh = NULL;
1855         int status = 0;
1856
1857         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
1858         if (status < 0) {
1859                 mlog_errno(status);
1860                 return status;
1861         }
1862
1863         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1864                                                        ORPHAN_DIR_SYSTEM_INODE,
1865                                                        osb->slot_num);
1866         if (!orphan_dir_inode) {
1867                 status = -ENOENT;
1868                 mlog_errno(status);
1869                 return status;
1870         }
1871
1872         mutex_lock(&orphan_dir_inode->i_mutex);
1873
1874         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1875         if (status < 0) {
1876                 mlog_errno(status);
1877                 goto leave;
1878         }
1879
1880         status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1881                                               orphan_dir_bh, name,
1882                                               OCFS2_ORPHAN_NAMELEN, lookup);
1883         if (status < 0) {
1884                 ocfs2_inode_unlock(orphan_dir_inode, 1);
1885
1886                 mlog_errno(status);
1887                 goto leave;
1888         }
1889
1890         *ret_orphan_dir = orphan_dir_inode;
1891
1892 leave:
1893         if (status) {
1894                 mutex_unlock(&orphan_dir_inode->i_mutex);
1895                 iput(orphan_dir_inode);
1896         }
1897
1898         brelse(orphan_dir_bh);
1899
1900         mlog_exit(status);
1901         return status;
1902 }
1903
1904 static int ocfs2_orphan_add(struct ocfs2_super *osb,
1905                             handle_t *handle,
1906                             struct inode *inode,
1907                             struct ocfs2_dinode *fe,
1908                             char *name,
1909                             struct ocfs2_dir_lookup_result *lookup,
1910                             struct inode *orphan_dir_inode)
1911 {
1912         struct buffer_head *orphan_dir_bh = NULL;
1913         int status = 0;
1914         struct ocfs2_dinode *orphan_fe;
1915
1916         mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
1917
1918         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
1919         if (status < 0) {
1920                 mlog_errno(status);
1921                 goto leave;
1922         }
1923
1924         status = ocfs2_journal_access_di(handle, orphan_dir_inode, orphan_dir_bh,
1925                                          OCFS2_JOURNAL_ACCESS_WRITE);
1926         if (status < 0) {
1927                 mlog_errno(status);
1928                 goto leave;
1929         }
1930
1931         /* we're a cluster, and nlink can change on disk from
1932          * underneath us... */
1933         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
1934         if (S_ISDIR(inode->i_mode))
1935                 le16_add_cpu(&orphan_fe->i_links_count, 1);
1936         orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count);
1937
1938         status = ocfs2_journal_dirty(handle, orphan_dir_bh);
1939         if (status < 0) {
1940                 mlog_errno(status);
1941                 goto leave;
1942         }
1943
1944         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
1945                                    OCFS2_ORPHAN_NAMELEN, inode,
1946                                    OCFS2_I(inode)->ip_blkno,
1947                                    orphan_dir_bh, lookup);
1948         if (status < 0) {
1949                 mlog_errno(status);
1950                 goto leave;
1951         }
1952
1953         le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
1954
1955         /* Record which orphan dir our inode now resides
1956          * in. delete_inode will use this to determine which orphan
1957          * dir to lock. */
1958         fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
1959
1960         mlog(0, "Inode %llu orphaned in slot %d\n",
1961              (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);
1962
1963 leave:
1964         brelse(orphan_dir_bh);
1965
1966         mlog_exit(status);
1967         return status;
1968 }
1969
1970 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
1971 int ocfs2_orphan_del(struct ocfs2_super *osb,
1972                      handle_t *handle,
1973                      struct inode *orphan_dir_inode,
1974                      struct inode *inode,
1975                      struct buffer_head *orphan_dir_bh)
1976 {
1977         char name[OCFS2_ORPHAN_NAMELEN + 1];
1978         struct ocfs2_dinode *orphan_fe;
1979         int status = 0;
1980         struct ocfs2_dir_lookup_result lookup = { NULL, };
1981
1982         mlog_entry_void();
1983
1984         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
1985         if (status < 0) {
1986                 mlog_errno(status);
1987                 goto leave;
1988         }
1989
1990         mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
1991              name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
1992              OCFS2_ORPHAN_NAMELEN);
1993
1994         /* find it's spot in the orphan directory */
1995         status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
1996                                   &lookup);
1997         if (status) {
1998                 mlog_errno(status);
1999                 goto leave;
2000         }
2001
2002         /* remove it from the orphan directory */
2003         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2004         if (status < 0) {
2005                 mlog_errno(status);
2006                 goto leave;
2007         }
2008
2009         status = ocfs2_journal_access_di(handle,orphan_dir_inode,  orphan_dir_bh,
2010                                          OCFS2_JOURNAL_ACCESS_WRITE);
2011         if (status < 0) {
2012                 mlog_errno(status);
2013                 goto leave;
2014         }
2015
2016         /* do the i_nlink dance! :) */
2017         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2018         if (S_ISDIR(inode->i_mode))
2019                 le16_add_cpu(&orphan_fe->i_links_count, -1);
2020         orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count);
2021
2022         status = ocfs2_journal_dirty(handle, orphan_dir_bh);
2023         if (status < 0) {
2024                 mlog_errno(status);
2025                 goto leave;
2026         }
2027
2028 leave:
2029         ocfs2_free_dir_lookup_result(&lookup);
2030
2031         mlog_exit(status);
2032         return status;
2033 }
2034
2035 const struct inode_operations ocfs2_dir_iops = {
2036         .create         = ocfs2_create,
2037         .lookup         = ocfs2_lookup,
2038         .link           = ocfs2_link,
2039         .unlink         = ocfs2_unlink,
2040         .rmdir          = ocfs2_unlink,
2041         .symlink        = ocfs2_symlink,
2042         .mkdir          = ocfs2_mkdir,
2043         .mknod          = ocfs2_mknod,
2044         .rename         = ocfs2_rename,
2045         .setattr        = ocfs2_setattr,
2046         .getattr        = ocfs2_getattr,
2047         .permission     = ocfs2_permission,
2048         .setxattr       = generic_setxattr,
2049         .getxattr       = generic_getxattr,
2050         .listxattr      = ocfs2_listxattr,
2051         .removexattr    = generic_removexattr,
2052 };