fs/ocfs2/namei.c

   1 /* -*- mode: c; c-basic-offset: 8; -*-
   2  * vim: noexpandtab sw=8 ts=8 sts=0:
   3  *
   4  * namei.c
   5  *
   6  * Create and rename file, directory, symlinks
   7  *
   8  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
   9  *
  10  *  Portions of this code from linux/fs/ext3/dir.c
  11  *
  12  *  Copyright (C) 1992, 1993, 1994, 1995
  13  *  Remy Card (card@masi.ibp.fr)
  14  *  Laboratoire MASI - Institut Blaise pascal
  15  *  Universite Pierre et Marie Curie (Paris VI)
  16  *
  17  *   from
  18  *
  19  *   linux/fs/minix/dir.c
  20  *
  21  *   Copyright (C) 1991, 1992 Linux Torvalds
  22  *
  23  * This program is free software; you can redistribute it and/or
  24  * modify it under the terms of the GNU General Public
  25  * License as published by the Free Software Foundation; either
  26  * version 2 of the License, or (at your option) any later version.
  27  *
  28  * This program is distributed in the hope that it will be useful,
  29  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  30  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  31  * General Public License for more details.
  32  *
  33  * You should have received a copy of the GNU General Public
  34  * License along with this program; if not, write to the
  35  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  36  * Boston, MA 021110-1307, USA.
  37  */
  38
  39 #include <linux/fs.h>
  40 #include <linux/types.h>
  41 #include <linux/slab.h>
  42 #include <linux/highmem.h>
  43 #include <linux/quotaops.h>
  44
  45 #define MLOG_MASK_PREFIX ML_NAMEI
  46 #include <cluster/masklog.h>
  47
  48 #include "ocfs2.h"
  49
  50 #include "alloc.h"
  51 #include "dcache.h"
  52 #include "dir.h"
  53 #include "dlmglue.h"
  54 #include "extent_map.h"
  55 #include "file.h"
  56 #include "inode.h"
  57 #include "journal.h"
  58 #include "namei.h"
  59 #include "suballoc.h"
  60 #include "super.h"
  61 #include "symlink.h"
  62 #include "sysfile.h"
  63 #include "uptodate.h"
  64 #include "xattr.h"
  65 #include "acl.h"
  66
  67 #include "buffer_head_io.h"
  68
  69 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
  70                               struct inode *dir,
  71                               struct inode *inode,
  72                               struct dentry *dentry,
  73                               dev_t dev,
  74                               struct buffer_head **new_fe_bh,
  75                               struct buffer_head *parent_fe_bh,
  76                               handle_t *handle,
  77                               struct ocfs2_alloc_context *inode_ac);
  78
  79 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
  80                                     struct inode **ret_orphan_dir,
  81                                     struct inode *inode,
  82                                     char *name,
  83                                     struct ocfs2_dir_lookup_result *lookup);
  84
  85 static int ocfs2_orphan_add(struct ocfs2_super *osb,
  86                             handle_t *handle,
  87                             struct inode *inode,
  88                             struct ocfs2_dinode *fe,
  89                             char *name,
  90                             struct ocfs2_dir_lookup_result *lookup,
  91                             struct inode *orphan_dir_inode);
  92
  93 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
  94                                      handle_t *handle,
  95                                      struct inode *inode,
  96                                      const char *symname);
  97
  98 /* An orphan dir name is an 8 byte value, printed as a hex string */
  99 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
 100
 101 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
 102                                    struct nameidata *nd)
 103 {
 104         int status;
 105         u64 blkno;
 106         struct inode *inode = NULL;
 107         struct dentry *ret;
 108         struct ocfs2_inode_info *oi;
 109
 110         mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
 111                    dentry->d_name.len, dentry->d_name.name);
 112
 113         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
 114                 ret = ERR_PTR(-ENAMETOOLONG);
 115                 goto bail;
 116         }
 117
 118         mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len,
 119              dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno);
 120
 121         status = ocfs2_inode_lock_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, dir, parent_fe_bh,
 379                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 380                 if (status < 0) {
 381                         mlog_errno(status);
 382                         goto leave;
 383                 }
 384                 ocfs2_add_links_count(dirfe, 1);
 385                 status = ocfs2_journal_dirty(handle, parent_fe_bh);
 386                 if (status < 0) {
 387                         mlog_errno(status);
 388                         goto leave;
 389                 }
 390                 inc_nlink(dir);
 391         }
 392
 393         status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
 394                                 meta_ac, data_ac);
 395         if (status < 0) {
 396                 mlog_errno(status);
 397                 goto leave;
 398         }
 399
 400         if (si.enable) {
 401                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
 402                                                  meta_ac, data_ac);
 403                 if (status < 0) {
 404                         mlog_errno(status);
 405                         goto leave;
 406                 }
 407         }
 408
 409         status = ocfs2_add_entry(handle, dentry, inode,
 410                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
 411                                  &lookup);
 412         if (status < 0) {
 413                 mlog_errno(status);
 414                 goto leave;
 415         }
 416
 417         status = ocfs2_dentry_attach_lock(dentry, inode,
 418                                           OCFS2_I(dir)->ip_blkno);
 419         if (status) {
 420                 mlog_errno(status);
 421                 goto leave;
 422         }
 423
 424         insert_inode_hash(inode);
 425         dentry->d_op = &ocfs2_dentry_ops;
 426         d_instantiate(dentry, inode);
 427         status = 0;
 428 leave:
 429         if (status < 0 && did_quota_inode)
 430                 vfs_dq_free_inode(inode);
 431         if (handle)
 432                 ocfs2_commit_trans(osb, handle);
 433
 434         ocfs2_inode_unlock(dir, 1);
 435
 436         if (status == -ENOSPC)
 437                 mlog(0, "Disk is full\n");
 438
 439         brelse(new_fe_bh);
 440         brelse(parent_fe_bh);
 441         kfree(si.name);
 442         kfree(si.value);
 443
 444         ocfs2_free_dir_lookup_result(&lookup);
 445
 446         if ((status < 0) && inode) {
 447                 clear_nlink(inode);
 448                 iput(inode);
 449         }
 450
 451         if (inode_ac)
 452                 ocfs2_free_alloc_context(inode_ac);
 453
 454         if (data_ac)
 455                 ocfs2_free_alloc_context(data_ac);
 456
 457         if (meta_ac)
 458                 ocfs2_free_alloc_context(meta_ac);
 459
 460         mlog_exit(status);
 461
 462         return status;
 463 }
 464
 465 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 466                               struct inode *dir,
 467                               struct inode *inode,
 468                               struct dentry *dentry,
 469                               dev_t dev,
 470                               struct buffer_head **new_fe_bh,
 471                               struct buffer_head *parent_fe_bh,
 472                               handle_t *handle,
 473                               struct ocfs2_alloc_context *inode_ac)
 474 {
 475         int status = 0;
 476         struct ocfs2_dinode *fe = NULL;
 477         struct ocfs2_extent_list *fel;
 478         u64 fe_blkno = 0;
 479         u16 suballoc_bit;
 480         u16 feat;
 481
 482         mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry,
 483                    inode->i_mode, (unsigned long)dev, dentry->d_name.len,
 484                    dentry->d_name.name);
 485
 486         *new_fe_bh = NULL;
 487
 488         status = ocfs2_claim_new_inode(osb, handle, dir, parent_fe_bh,
 489                                        inode_ac, &suballoc_bit, &fe_blkno);
 490         if (status < 0) {
 491                 mlog_errno(status);
 492                 goto leave;
 493         }
 494
 495         /* populate as many fields early on as possible - many of
 496          * these are used by the support functions here and in
 497          * callers. */
 498         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
 499         OCFS2_I(inode)->ip_blkno = fe_blkno;
 500         spin_lock(&osb->osb_lock);
 501         inode->i_generation = osb->s_next_generation++;
 502         spin_unlock(&osb->osb_lock);
 503
 504         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
 505         if (!*new_fe_bh) {
 506                 status = -EIO;
 507                 mlog_errno(status);
 508                 goto leave;
 509         }
 510         ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh);
 511
 512         status = ocfs2_journal_access_di(handle, inode, *new_fe_bh,
 513                                          OCFS2_JOURNAL_ACCESS_CREATE);
 514         if (status < 0) {
 515                 mlog_errno(status);
 516                 goto leave;
 517         }
 518
 519         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
 520         memset(fe, 0, osb->sb->s_blocksize);
 521
 522         fe->i_generation = cpu_to_le32(inode->i_generation);
 523         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
 524         fe->i_blkno = cpu_to_le64(fe_blkno);
 525         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
 526         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
 527         fe->i_uid = cpu_to_le32(inode->i_uid);
 528         fe->i_gid = cpu_to_le32(inode->i_gid);
 529         fe->i_mode = cpu_to_le16(inode->i_mode);
 530         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 531                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
 532
 533         ocfs2_set_links_count(fe, inode->i_nlink);
 534
 535         fe->i_last_eb_blk = 0;
 536         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 537         le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
 538         fe->i_atime = fe->i_ctime = fe->i_mtime =
 539                 cpu_to_le64(CURRENT_TIME.tv_sec);
 540         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
 541                 cpu_to_le32(CURRENT_TIME.tv_nsec);
 542         fe->i_dtime = 0;
 543
 544         /*
 545          * If supported, directories start with inline data. If inline
 546          * isn't supported, but indexing is, we start them as indexed.
 547          */
 548         feat = le16_to_cpu(fe->i_dyn_features);
 549         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
 550                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
 551
 552                 fe->id2.i_data.id_count = cpu_to_le16(
 553                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
 554         } else {
 555                 fel = &fe->id2.i_list;
 556                 fel->l_tree_depth = 0;
 557                 fel->l_next_free_rec = 0;
 558                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
 559         }
 560
 561         status = ocfs2_journal_dirty(handle, *new_fe_bh);
 562         if (status < 0) {
 563                 mlog_errno(status);
 564                 goto leave;
 565         }
 566
 567         ocfs2_populate_inode(inode, fe, 1);
 568         ocfs2_inode_set_new(osb, inode);
 569         if (!ocfs2_mount_local(osb)) {
 570                 status = ocfs2_create_new_inode_locks(inode);
 571                 if (status < 0)
 572                         mlog_errno(status);
 573         }
 574
 575         status = 0; /* error in ocfs2_create_new_inode_locks is not
 576                      * critical */
 577
 578 leave:
 579         if (status < 0) {
 580                 if (*new_fe_bh) {
 581                         brelse(*new_fe_bh);
 582                         *new_fe_bh = NULL;
 583                 }
 584         }
 585
 586         mlog_exit(status);
 587         return status;
 588 }
 589
 590 static int ocfs2_mkdir(struct inode *dir,
 591                        struct dentry *dentry,
 592                        int mode)
 593 {
 594         int ret;
 595
 596         mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
 597                    dentry->d_name.len, dentry->d_name.name);
 598         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
 599         mlog_exit(ret);
 600
 601         return ret;
 602 }
 603
 604 static int ocfs2_create(struct inode *dir,
 605                         struct dentry *dentry,
 606                         int mode,
 607                         struct nameidata *nd)
 608 {
 609         int ret;
 610
 611         mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
 612                    dentry->d_name.len, dentry->d_name.name);
 613         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
 614         mlog_exit(ret);
 615
 616         return ret;
 617 }
 618
 619 static int ocfs2_link(struct dentry *old_dentry,
 620                       struct inode *dir,
 621                       struct dentry *dentry)
 622 {
 623         handle_t *handle;
 624         struct inode *inode = old_dentry->d_inode;
 625         int err;
 626         struct buffer_head *fe_bh = NULL;
 627         struct buffer_head *parent_fe_bh = NULL;
 628         struct ocfs2_dinode *fe = NULL;
 629         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 630         struct ocfs2_dir_lookup_result lookup = { NULL, };
 631
 632         mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
 633                    old_dentry->d_name.len, old_dentry->d_name.name,
 634                    dentry->d_name.len, dentry->d_name.name);
 635
 636         if (S_ISDIR(inode->i_mode))
 637                 return -EPERM;
 638
 639         err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
 640         if (err < 0) {
 641                 if (err != -ENOENT)
 642                         mlog_errno(err);
 643                 return err;
 644         }
 645
 646         if (!dir->i_nlink) {
 647                 err = -ENOENT;
 648                 goto out;
 649         }
 650
 651         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 652                                         dentry->d_name.len);
 653         if (err)
 654                 goto out;
 655
 656         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 657                                            dentry->d_name.name,
 658                                            dentry->d_name.len, &lookup);
 659         if (err < 0) {
 660                 mlog_errno(err);
 661                 goto out;
 662         }
 663
 664         err = ocfs2_inode_lock(inode, &fe_bh, 1);
 665         if (err < 0) {
 666                 if (err != -ENOENT)
 667                         mlog_errno(err);
 668                 goto out;
 669         }
 670
 671         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 672         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
 673                 err = -EMLINK;
 674                 goto out_unlock_inode;
 675         }
 676
 677         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
 678         if (IS_ERR(handle)) {
 679                 err = PTR_ERR(handle);
 680                 handle = NULL;
 681                 mlog_errno(err);
 682                 goto out_unlock_inode;
 683         }
 684
 685         err = ocfs2_journal_access_di(handle, inode, fe_bh,
 686                                       OCFS2_JOURNAL_ACCESS_WRITE);
 687         if (err < 0) {
 688                 mlog_errno(err);
 689                 goto out_commit;
 690         }
 691
 692         inc_nlink(inode);
 693         inode->i_ctime = CURRENT_TIME;
 694         ocfs2_set_links_count(fe, inode->i_nlink);
 695         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 696         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 697
 698         err = ocfs2_journal_dirty(handle, fe_bh);
 699         if (err < 0) {
 700                 ocfs2_add_links_count(fe, -1);
 701                 drop_nlink(inode);
 702                 mlog_errno(err);
 703                 goto out_commit;
 704         }
 705
 706         err = ocfs2_add_entry(handle, dentry, inode,
 707                               OCFS2_I(inode)->ip_blkno,
 708                               parent_fe_bh, &lookup);
 709         if (err) {
 710                 ocfs2_add_links_count(fe, -1);
 711                 drop_nlink(inode);
 712                 mlog_errno(err);
 713                 goto out_commit;
 714         }
 715
 716         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
 717         if (err) {
 718                 mlog_errno(err);
 719                 goto out_commit;
 720         }
 721
 722         atomic_inc(&inode->i_count);
 723         dentry->d_op = &ocfs2_dentry_ops;
 724         d_instantiate(dentry, inode);
 725
 726 out_commit:
 727         ocfs2_commit_trans(osb, handle);
 728 out_unlock_inode:
 729         ocfs2_inode_unlock(inode, 1);
 730
 731 out:
 732         ocfs2_inode_unlock(dir, 1);
 733
 734         brelse(fe_bh);
 735         brelse(parent_fe_bh);
 736
 737         ocfs2_free_dir_lookup_result(&lookup);
 738
 739         mlog_exit(err);
 740
 741         return err;
 742 }
 743
 744 /*
 745  * Takes and drops an exclusive lock on the given dentry. This will
 746  * force other nodes to drop it.
 747  */
 748 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 749 {
 750         int ret;
 751
 752         ret = ocfs2_dentry_lock(dentry, 1);
 753         if (ret)
 754                 mlog_errno(ret);
 755         else
 756                 ocfs2_dentry_unlock(dentry, 1);
 757
 758         return ret;
 759 }
 760
 761 static inline int inode_is_unlinkable(struct inode *inode)
 762 {
 763         if (S_ISDIR(inode->i_mode)) {
 764                 if (inode->i_nlink == 2)
 765                         return 1;
 766                 return 0;
 767         }
 768
 769         if (inode->i_nlink == 1)
 770                 return 1;
 771         return 0;
 772 }
 773
 774 static int ocfs2_unlink(struct inode *dir,
 775                         struct dentry *dentry)
 776 {
 777         int status;
 778         int child_locked = 0;
 779         struct inode *inode = dentry->d_inode;
 780         struct inode *orphan_dir = NULL;
 781         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 782         u64 blkno;
 783         struct ocfs2_dinode *fe = NULL;
 784         struct buffer_head *fe_bh = NULL;
 785         struct buffer_head *parent_node_bh = NULL;
 786         handle_t *handle = NULL;
 787         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 788         struct ocfs2_dir_lookup_result lookup = { NULL, };
 789         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
 790
 791         mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
 792                    dentry->d_name.len, dentry->d_name.name);
 793
 794         BUG_ON(dentry->d_parent->d_inode != dir);
 795
 796         mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);
 797
 798         if (inode == osb->root_inode) {
 799                 mlog(0, "Cannot delete the root directory\n");
 800                 return -EPERM;
 801         }
 802
 803         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
 804                                          OI_LS_PARENT);
 805         if (status < 0) {
 806                 if (status != -ENOENT)
 807                         mlog_errno(status);
 808                 return status;
 809         }
 810
 811         status = ocfs2_find_files_on_disk(dentry->d_name.name,
 812                                           dentry->d_name.len, &blkno, dir,
 813                                           &lookup);
 814         if (status < 0) {
 815                 if (status != -ENOENT)
 816                         mlog_errno(status);
 817                 goto leave;
 818         }
 819
 820         if (OCFS2_I(inode)->ip_blkno != blkno) {
 821                 status = -ENOENT;
 822
 823                 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
 824                      (unsigned long long)OCFS2_I(inode)->ip_blkno,
 825                      (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
 826                 goto leave;
 827         }
 828
 829         status = ocfs2_inode_lock(inode, &fe_bh, 1);
 830         if (status < 0) {
 831                 if (status != -ENOENT)
 832                         mlog_errno(status);
 833                 goto leave;
 834         }
 835         child_locked = 1;
 836
 837         if (S_ISDIR(inode->i_mode)) {
 838                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
 839                         status = -ENOTEMPTY;
 840                         goto leave;
 841                 }
 842         }
 843
 844         status = ocfs2_remote_dentry_delete(dentry);
 845         if (status < 0) {
 846                 /* This remote delete should succeed under all normal
 847                  * circumstances. */
 848                 mlog_errno(status);
 849                 goto leave;
 850         }
 851
 852         if (inode_is_unlinkable(inode)) {
 853                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, inode,
 854                                                   orphan_name, &orphan_insert);
 855                 if (status < 0) {
 856                         mlog_errno(status);
 857                         goto leave;
 858                 }
 859         }
 860
 861         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
 862         if (IS_ERR(handle)) {
 863                 status = PTR_ERR(handle);
 864                 handle = NULL;
 865                 mlog_errno(status);
 866                 goto leave;
 867         }
 868
 869         status = ocfs2_journal_access_di(handle, inode, fe_bh,
 870                                          OCFS2_JOURNAL_ACCESS_WRITE);
 871         if (status < 0) {
 872                 mlog_errno(status);
 873                 goto leave;
 874         }
 875
 876         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 877
 878         if (inode_is_unlinkable(inode)) {
 879                 status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name,
 880                                           &orphan_insert, orphan_dir);
 881                 if (status < 0) {
 882                         mlog_errno(status);
 883                         goto leave;
 884                 }
 885         }
 886
 887         /* delete the name from the parent dir */
 888         status = ocfs2_delete_entry(handle, dir, &lookup);
 889         if (status < 0) {
 890                 mlog_errno(status);
 891                 goto leave;
 892         }
 893
 894         if (S_ISDIR(inode->i_mode))
 895                 drop_nlink(inode);
 896         drop_nlink(inode);
 897         ocfs2_set_links_count(fe, inode->i_nlink);
 898
 899         status = ocfs2_journal_dirty(handle, fe_bh);
 900         if (status < 0) {
 901                 mlog_errno(status);
 902                 goto leave;
 903         }
 904
 905         dir->i_ctime = dir->i_mtime = CURRENT_TIME;
 906         if (S_ISDIR(inode->i_mode))
 907                 drop_nlink(dir);
 908
 909         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
 910         if (status < 0) {
 911                 mlog_errno(status);
 912                 if (S_ISDIR(inode->i_mode))
 913                         inc_nlink(dir);
 914         }
 915
 916 leave:
 917         if (handle)
 918                 ocfs2_commit_trans(osb, handle);
 919
 920         if (child_locked)
 921                 ocfs2_inode_unlock(inode, 1);
 922
 923         ocfs2_inode_unlock(dir, 1);
 924
 925         if (orphan_dir) {
 926                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
 927                 ocfs2_inode_unlock(orphan_dir, 1);
 928                 mutex_unlock(&orphan_dir->i_mutex);
 929                 iput(orphan_dir);
 930         }
 931
 932         brelse(fe_bh);
 933         brelse(parent_node_bh);
 934
 935         ocfs2_free_dir_lookup_result(&orphan_insert);
 936         ocfs2_free_dir_lookup_result(&lookup);
 937
 938         mlog_exit(status);
 939
 940         return status;
 941 }
 942
 943 /*
 944  * The only place this should be used is rename!
 945  * if they have the same id, then the 1st one is the only one locked.
 946  */
 947 static int ocfs2_double_lock(struct ocfs2_super *osb,
 948                              struct buffer_head **bh1,
 949                              struct inode *inode1,
 950                              struct buffer_head **bh2,
 951                              struct inode *inode2)
 952 {
 953         int status;
 954         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
 955         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
 956         struct buffer_head **tmpbh;
 957         struct inode *tmpinode;
 958
 959         mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
 960                    (unsigned long long)oi1->ip_blkno,
 961                    (unsigned long long)oi2->ip_blkno);
 962
 963         if (*bh1)
 964                 *bh1 = NULL;
 965         if (*bh2)
 966                 *bh2 = NULL;
 967
 968         /* we always want to lock the one with the lower lockid first. */
 969         if (oi1->ip_blkno != oi2->ip_blkno) {
 970                 if (oi1->ip_blkno < oi2->ip_blkno) {
 971                         /* switch id1 and id2 around */
 972                         mlog(0, "switching them around...\n");
 973                         tmpbh = bh2;
 974                         bh2 = bh1;
 975                         bh1 = tmpbh;
 976
 977                         tmpinode = inode2;
 978                         inode2 = inode1;
 979                         inode1 = tmpinode;
 980                 }
 981                 /* lock id2 */
 982                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
 983                                                  OI_LS_RENAME1);
 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_nested(inode1, bh1, 1, OI_LS_RENAME2);
 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 *newfe_bh = NULL;
1031         struct buffer_head *old_inode_bh = NULL;
1032         struct ocfs2_super *osb = NULL;
1033         u64 newfe_blkno, old_de_ino;
1034         handle_t *handle = NULL;
1035         struct buffer_head *old_dir_bh = NULL;
1036         struct buffer_head *new_dir_bh = NULL;
1037         nlink_t old_dir_nlink = old_dir->i_nlink;
1038         struct ocfs2_dinode *old_di;
1039         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1040         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1041         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1042         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1043         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1044
1045         /* At some point it might be nice to break this function up a
1046          * bit. */
1047
1048         mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
1049                    old_dir, old_dentry, new_dir, new_dentry,
1050                    old_dentry->d_name.len, old_dentry->d_name.name,
1051                    new_dentry->d_name.len, new_dentry->d_name.name);
1052
1053         osb = OCFS2_SB(old_dir->i_sb);
1054
1055         if (new_inode) {
1056                 if (!igrab(new_inode))
1057                         BUG();
1058         }
1059
1060         /* Assume a directory hierarchy thusly:
1061          * a/b/c
1062          * a/d
1063          * a,b,c, and d are all directories.
1064          *
1065          * from cwd of 'a' on both nodes:
1066          * node1: mv b/c d
1067          * node2: mv d   b/c
1068          *
1069          * And that's why, just like the VFS, we need a file system
1070          * rename lock. */
1071         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1072                 status = ocfs2_rename_lock(osb);
1073                 if (status < 0) {
1074                         mlog_errno(status);
1075                         goto bail;
1076                 }
1077                 rename_lock = 1;
1078         }
1079
1080         /* if old and new are the same, this'll just do one lock. */
1081         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1082                                    &new_dir_bh, new_dir);
1083         if (status < 0) {
1084                 mlog_errno(status);
1085                 goto bail;
1086         }
1087         parents_locked = 1;
1088
1089         /* make sure both dirs have bhs
1090          * get an extra ref on old_dir_bh if old==new */
1091         if (!new_dir_bh) {
1092                 if (old_dir_bh) {
1093                         new_dir_bh = old_dir_bh;
1094                         get_bh(new_dir_bh);
1095                 } else {
1096                         mlog(ML_ERROR, "no old_dir_bh!\n");
1097                         status = -EIO;
1098                         goto bail;
1099                 }
1100         }
1101
1102         /*
1103          * Aside from allowing a meta data update, the locking here
1104          * also ensures that the downconvert thread on other nodes
1105          * won't have to concurrently downconvert the inode and the
1106          * dentry locks.
1107          */
1108         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1109                                          OI_LS_PARENT);
1110         if (status < 0) {
1111                 if (status != -ENOENT)
1112                         mlog_errno(status);
1113                 goto bail;
1114         }
1115         old_child_locked = 1;
1116
1117         status = ocfs2_remote_dentry_delete(old_dentry);
1118         if (status < 0) {
1119                 mlog_errno(status);
1120                 goto bail;
1121         }
1122
1123         if (S_ISDIR(old_inode->i_mode)) {
1124                 u64 old_inode_parent;
1125
1126                 update_dot_dot = 1;
1127                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1128                                                   old_inode,
1129                                                   &old_inode_dot_dot_res);
1130                 if (status) {
1131                         status = -EIO;
1132                         goto bail;
1133                 }
1134
1135                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1136                         status = -EIO;
1137                         goto bail;
1138                 }
1139
1140                 if (!new_inode && new_dir != old_dir &&
1141                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1142                         status = -EMLINK;
1143                         goto bail;
1144                 }
1145         }
1146
1147         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1148                                             old_dentry->d_name.len,
1149                                             &old_de_ino);
1150         if (status) {
1151                 status = -ENOENT;
1152                 goto bail;
1153         }
1154
1155         /*
1156          *  Check for inode number is _not_ due to possible IO errors.
1157          *  We might rmdir the source, keep it as pwd of some process
1158          *  and merrily kill the link to whatever was created under the
1159          *  same name. Goodbye sticky bit ;-<
1160          */
1161         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1162                 status = -ENOENT;
1163                 goto bail;
1164         }
1165
1166         /* check if the target already exists (in which case we need
1167          * to delete it */
1168         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1169                                           new_dentry->d_name.len,
1170                                           &newfe_blkno, new_dir,
1171                                           &target_lookup_res);
1172         /* The only error we allow here is -ENOENT because the new
1173          * file not existing is perfectly valid. */
1174         if ((status < 0) && (status != -ENOENT)) {
1175                 /* If we cannot find the file specified we should just */
1176                 /* return the error... */
1177                 mlog_errno(status);
1178                 goto bail;
1179         }
1180         if (status == 0)
1181                 target_exists = 1;
1182
1183         if (!target_exists && new_inode) {
1184                 /*
1185                  * Target was unlinked by another node while we were
1186                  * waiting to get to ocfs2_rename(). There isn't
1187                  * anything we can do here to help the situation, so
1188                  * bubble up the appropriate error.
1189                  */
1190                 status = -ENOENT;
1191                 goto bail;
1192         }
1193
1194         /* In case we need to overwrite an existing file, we blow it
1195          * away first */
1196         if (target_exists) {
1197                 /* VFS didn't think there existed an inode here, but
1198                  * someone else in the cluster must have raced our
1199                  * rename to create one. Today we error cleanly, in
1200                  * the future we should consider calling iget to build
1201                  * a new struct inode for this entry. */
1202                 if (!new_inode) {
1203                         status = -EACCES;
1204
1205                         mlog(0, "We found an inode for name %.*s but VFS "
1206                              "didn't give us one.\n", new_dentry->d_name.len,
1207                              new_dentry->d_name.name);
1208                         goto bail;
1209                 }
1210
1211                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1212                         status = -EACCES;
1213
1214                         mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1215                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1216                              (unsigned long long)newfe_blkno,
1217                              OCFS2_I(new_inode)->ip_flags);
1218                         goto bail;
1219                 }
1220
1221                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1222                 if (status < 0) {
1223                         if (status != -ENOENT)
1224                                 mlog_errno(status);
1225                         goto bail;
1226                 }
1227                 new_child_locked = 1;
1228
1229                 status = ocfs2_remote_dentry_delete(new_dentry);
1230                 if (status < 0) {
1231                         mlog_errno(status);
1232                         goto bail;
1233                 }
1234
1235                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1236
1237                 mlog(0, "aha rename over existing... new_blkno=%llu "
1238                      "newfebh=%p bhblocknr=%llu\n",
1239                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1240                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1241
1242                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1243                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1244                                                           new_inode,
1245                                                           orphan_name,
1246                                                           &orphan_insert);
1247                         if (status < 0) {
1248                                 mlog_errno(status);
1249                                 goto bail;
1250                         }
1251                 }
1252         } else {
1253                 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1254
1255                 status = ocfs2_check_dir_for_entry(new_dir,
1256                                                    new_dentry->d_name.name,
1257                                                    new_dentry->d_name.len);
1258                 if (status)
1259                         goto bail;
1260
1261                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1262                                                       new_dentry->d_name.name,
1263                                                       new_dentry->d_name.len,
1264                                                       &target_insert);
1265                 if (status < 0) {
1266                         mlog_errno(status);
1267                         goto bail;
1268                 }
1269         }
1270
1271         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1272         if (IS_ERR(handle)) {
1273                 status = PTR_ERR(handle);
1274                 handle = NULL;
1275                 mlog_errno(status);
1276                 goto bail;
1277         }
1278
1279         if (target_exists) {
1280                 if (S_ISDIR(new_inode->i_mode)) {
1281                         if (new_inode->i_nlink != 2 ||
1282                             !ocfs2_empty_dir(new_inode)) {
1283                                 status = -ENOTEMPTY;
1284                                 goto bail;
1285                         }
1286                 }
1287                 status = ocfs2_journal_access_di(handle, new_inode, newfe_bh,
1288                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1289                 if (status < 0) {
1290                         mlog_errno(status);
1291                         goto bail;
1292                 }
1293
1294                 if (S_ISDIR(new_inode->i_mode) ||
1295                     (ocfs2_read_links_count(newfe) == 1)) {
1296                         status = ocfs2_orphan_add(osb, handle, new_inode,
1297                                                   newfe, orphan_name,
1298                                                   &orphan_insert, orphan_dir);
1299                         if (status < 0) {
1300                                 mlog_errno(status);
1301                                 goto bail;
1302                         }
1303                 }
1304
1305                 /* change the dirent to point to the correct inode */
1306                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1307                                             old_inode);
1308                 if (status < 0) {
1309                         mlog_errno(status);
1310                         goto bail;
1311                 }
1312                 new_dir->i_version++;
1313
1314                 if (S_ISDIR(new_inode->i_mode))
1315                         ocfs2_set_links_count(newfe, 0);
1316                 else
1317                         ocfs2_add_links_count(newfe, -1);
1318
1319                 status = ocfs2_journal_dirty(handle, newfe_bh);
1320                 if (status < 0) {
1321                         mlog_errno(status);
1322                         goto bail;
1323                 }
1324         } else {
1325                 /* if the name was not found in new_dir, add it now */
1326                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1327                                          OCFS2_I(old_inode)->ip_blkno,
1328                                          new_dir_bh, &target_insert);
1329         }
1330
1331         old_inode->i_ctime = CURRENT_TIME;
1332         mark_inode_dirty(old_inode);
1333
1334         status = ocfs2_journal_access_di(handle, old_inode, old_inode_bh,
1335                                          OCFS2_JOURNAL_ACCESS_WRITE);
1336         if (status >= 0) {
1337                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1338
1339                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1340                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1341
1342                 status = ocfs2_journal_dirty(handle, old_inode_bh);
1343                 if (status < 0)
1344                         mlog_errno(status);
1345         } else
1346                 mlog_errno(status);
1347
1348         /*
1349          * Now that the name has been added to new_dir, remove the old name.
1350          *
1351          * We don't keep any directory entry context around until now
1352          * because the insert might have changed the type of directory
1353          * we're dealing with.
1354          */
1355         status = ocfs2_find_entry(old_dentry->d_name.name,
1356                                   old_dentry->d_name.len, old_dir,
1357                                   &old_entry_lookup);
1358         if (status)
1359                 goto bail;
1360
1361         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1362         if (status < 0) {
1363                 mlog_errno(status);
1364                 goto bail;
1365         }
1366
1367         if (new_inode) {
1368                 new_inode->i_nlink--;
1369                 new_inode->i_ctime = CURRENT_TIME;
1370         }
1371         old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1372
1373         if (update_dot_dot) {
1374                 status = ocfs2_update_entry(old_inode, handle,
1375                                             &old_inode_dot_dot_res, new_dir);
1376                 old_dir->i_nlink--;
1377                 if (new_inode) {
1378                         new_inode->i_nlink--;
1379                 } else {
1380                         inc_nlink(new_dir);
1381                         mark_inode_dirty(new_dir);
1382                 }
1383         }
1384         mark_inode_dirty(old_dir);
1385         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1386         if (new_inode) {
1387                 mark_inode_dirty(new_inode);
1388                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1389         }
1390
1391         if (old_dir != new_dir) {
1392                 /* Keep the same times on both directories.*/
1393                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1394
1395                 /*
1396                  * This will also pick up the i_nlink change from the
1397                  * block above.
1398                  */
1399                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1400         }
1401
1402         if (old_dir_nlink != old_dir->i_nlink) {
1403                 if (!old_dir_bh) {
1404                         mlog(ML_ERROR, "need to change nlink for old dir "
1405                              "%llu from %d to %d but bh is NULL!\n",
1406                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1407                              (int)old_dir_nlink, old_dir->i_nlink);
1408                 } else {
1409                         struct ocfs2_dinode *fe;
1410                         status = ocfs2_journal_access_di(handle, old_dir,
1411                                                       old_dir_bh,
1412                                                       OCFS2_JOURNAL_ACCESS_WRITE);
1413                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1414                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1415                         status = ocfs2_journal_dirty(handle, old_dir_bh);
1416                 }
1417         }
1418         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1419         status = 0;
1420 bail:
1421         if (rename_lock)
1422                 ocfs2_rename_unlock(osb);
1423
1424         if (handle)
1425                 ocfs2_commit_trans(osb, handle);
1426
1427         if (parents_locked)
1428                 ocfs2_double_unlock(old_dir, new_dir);
1429
1430         if (old_child_locked)
1431                 ocfs2_inode_unlock(old_inode, 1);
1432
1433         if (new_child_locked)
1434                 ocfs2_inode_unlock(new_inode, 1);
1435
1436         if (orphan_dir) {
1437                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1438                 ocfs2_inode_unlock(orphan_dir, 1);
1439                 mutex_unlock(&orphan_dir->i_mutex);
1440                 iput(orphan_dir);
1441         }
1442
1443         if (new_inode)
1444                 sync_mapping_buffers(old_inode->i_mapping);
1445
1446         if (new_inode)
1447                 iput(new_inode);
1448
1449         ocfs2_free_dir_lookup_result(&target_lookup_res);
1450         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1451         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1452         ocfs2_free_dir_lookup_result(&orphan_insert);
1453         ocfs2_free_dir_lookup_result(&target_insert);
1454
1455         brelse(newfe_bh);
1456         brelse(old_inode_bh);
1457         brelse(old_dir_bh);
1458         brelse(new_dir_bh);
1459
1460         mlog_exit(status);
1461
1462         return status;
1463 }
1464
1465 /*
1466  * we expect i_size = strlen(symname). Copy symname into the file
1467  * data, including the null terminator.
1468  */
1469 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1470                                      handle_t *handle,
1471                                      struct inode *inode,
1472                                      const char *symname)
1473 {
1474         struct buffer_head **bhs = NULL;
1475         const char *c;
1476         struct super_block *sb = osb->sb;
1477         u64 p_blkno, p_blocks;
1478         int virtual, blocks, status, i, bytes_left;
1479
1480         bytes_left = i_size_read(inode) + 1;
1481         /* we can't trust i_blocks because we're actually going to
1482          * write i_size + 1 bytes. */
1483         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1484
1485         mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
1486                         (unsigned long long)inode->i_blocks,
1487                         i_size_read(inode), blocks);
1488
1489         /* Sanity check -- make sure we're going to fit. */
1490         if (bytes_left >
1491             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1492                 status = -EIO;
1493                 mlog_errno(status);
1494                 goto bail;
1495         }
1496
1497         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1498         if (!bhs) {
1499                 status = -ENOMEM;
1500                 mlog_errno(status);
1501                 goto bail;
1502         }
1503
1504         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1505                                              NULL);
1506         if (status < 0) {
1507                 mlog_errno(status);
1508                 goto bail;
1509         }
1510
1511         /* links can never be larger than one cluster so we know this
1512          * is all going to be contiguous, but do a sanity check
1513          * anyway. */
1514         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1515                 status = -EIO;
1516                 mlog_errno(status);
1517                 goto bail;
1518         }
1519
1520         virtual = 0;
1521         while(bytes_left > 0) {
1522                 c = &symname[virtual * sb->s_blocksize];
1523
1524                 bhs[virtual] = sb_getblk(sb, p_blkno);
1525                 if (!bhs[virtual]) {
1526                         status = -ENOMEM;
1527                         mlog_errno(status);
1528                         goto bail;
1529                 }
1530                 ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]);
1531
1532                 status = ocfs2_journal_access(handle, inode, bhs[virtual],
1533                                               OCFS2_JOURNAL_ACCESS_CREATE);
1534                 if (status < 0) {
1535                         mlog_errno(status);
1536                         goto bail;
1537                 }
1538
1539                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1540
1541                 memcpy(bhs[virtual]->b_data, c,
1542                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1543                        bytes_left);
1544
1545                 status = ocfs2_journal_dirty(handle, bhs[virtual]);
1546                 if (status < 0) {
1547                         mlog_errno(status);
1548                         goto bail;
1549                 }
1550
1551                 virtual++;
1552                 p_blkno++;
1553                 bytes_left -= sb->s_blocksize;
1554         }
1555
1556         status = 0;
1557 bail:
1558
1559         if (bhs) {
1560                 for(i = 0; i < blocks; i++)
1561                         brelse(bhs[i]);
1562                 kfree(bhs);
1563         }
1564
1565         mlog_exit(status);
1566         return status;
1567 }
1568
1569 static int ocfs2_symlink(struct inode *dir,
1570                          struct dentry *dentry,
1571                          const char *symname)
1572 {
1573         int status, l, credits;
1574         u64 newsize;
1575         struct ocfs2_super *osb = NULL;
1576         struct inode *inode = NULL;
1577         struct super_block *sb;
1578         struct buffer_head *new_fe_bh = NULL;
1579         struct buffer_head *parent_fe_bh = NULL;
1580         struct ocfs2_dinode *fe = NULL;
1581         struct ocfs2_dinode *dirfe;
1582         handle_t *handle = NULL;
1583         struct ocfs2_alloc_context *inode_ac = NULL;
1584         struct ocfs2_alloc_context *data_ac = NULL;
1585         struct ocfs2_alloc_context *xattr_ac = NULL;
1586         int want_clusters = 0;
1587         int xattr_credits = 0;
1588         struct ocfs2_security_xattr_info si = {
1589                 .enable = 1,
1590         };
1591         int did_quota = 0, did_quota_inode = 0;
1592         struct ocfs2_dir_lookup_result lookup = { NULL, };
1593
1594         mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1595                    dentry, symname, dentry->d_name.len, dentry->d_name.name);
1596
1597         sb = dir->i_sb;
1598         osb = OCFS2_SB(sb);
1599
1600         l = strlen(symname) + 1;
1601
1602         credits = ocfs2_calc_symlink_credits(sb);
1603
1604         /* lock the parent directory */
1605         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1606         if (status < 0) {
1607                 if (status != -ENOENT)
1608                         mlog_errno(status);
1609                 return status;
1610         }
1611
1612         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1613         if (!ocfs2_read_links_count(dirfe)) {
1614                 /* can't make a file in a deleted directory. */
1615                 status = -ENOENT;
1616                 goto bail;
1617         }
1618
1619         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1620                                            dentry->d_name.len);
1621         if (status)
1622                 goto bail;
1623
1624         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1625                                               dentry->d_name.name,
1626                                               dentry->d_name.len, &lookup);
1627         if (status < 0) {
1628                 mlog_errno(status);
1629                 goto bail;
1630         }
1631
1632         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1633         if (status < 0) {
1634                 if (status != -ENOSPC)
1635                         mlog_errno(status);
1636                 goto bail;
1637         }
1638
1639         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1640         if (!inode) {
1641                 status = -ENOMEM;
1642                 mlog_errno(status);
1643                 goto bail;
1644         }
1645
1646         /* get security xattr */
1647         status = ocfs2_init_security_get(inode, dir, &si);
1648         if (status) {
1649                 if (status == -EOPNOTSUPP)
1650                         si.enable = 0;
1651                 else {
1652                         mlog_errno(status);
1653                         goto bail;
1654                 }
1655         }
1656
1657         /* calculate meta data/clusters for setting security xattr */
1658         if (si.enable) {
1659                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1660                                                   &xattr_credits, &xattr_ac);
1661                 if (status < 0) {
1662                         mlog_errno(status);
1663                         goto bail;
1664                 }
1665         }
1666
1667         /* don't reserve bitmap space for fast symlinks. */
1668         if (l > ocfs2_fast_symlink_chars(sb))
1669                 want_clusters += 1;
1670
1671         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1672         if (status < 0) {
1673                 if (status != -ENOSPC)
1674                         mlog_errno(status);
1675                 goto bail;
1676         }
1677
1678         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1679         if (IS_ERR(handle)) {
1680                 status = PTR_ERR(handle);
1681                 handle = NULL;
1682                 mlog_errno(status);
1683                 goto bail;
1684         }
1685
1686         /* We don't use standard VFS wrapper because we don't want vfs_dq_init
1687          * to be called. */
1688         if (sb_any_quota_active(osb->sb) &&
1689             osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
1690                 status = -EDQUOT;
1691                 goto bail;
1692         }
1693         did_quota_inode = 1;
1694
1695         status = ocfs2_mknod_locked(osb, dir, inode, dentry,
1696                                     0, &new_fe_bh, parent_fe_bh, handle,
1697                                     inode_ac);
1698         if (status < 0) {
1699                 mlog_errno(status);
1700                 goto bail;
1701         }
1702
1703         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1704         inode->i_rdev = 0;
1705         newsize = l - 1;
1706         if (l > ocfs2_fast_symlink_chars(sb)) {
1707                 u32 offset = 0;
1708
1709                 inode->i_op = &ocfs2_symlink_inode_operations;
1710                 if (vfs_dq_alloc_space_nodirty(inode,
1711                     ocfs2_clusters_to_bytes(osb->sb, 1))) {
1712                         status = -EDQUOT;
1713                         goto bail;
1714                 }
1715                 did_quota = 1;
1716                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1717                                               new_fe_bh,
1718                                               handle, data_ac, NULL,
1719                                               NULL);
1720                 if (status < 0) {
1721                         if (status != -ENOSPC && status != -EINTR) {
1722                                 mlog(ML_ERROR,
1723                                      "Failed to extend file to %llu\n",
1724                                      (unsigned long long)newsize);
1725                                 mlog_errno(status);
1726                                 status = -ENOSPC;
1727                         }
1728                         goto bail;
1729                 }
1730                 i_size_write(inode, newsize);
1731                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1732         } else {
1733                 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1734                 memcpy((char *) fe->id2.i_symlink, symname, l);
1735                 i_size_write(inode, newsize);
1736                 inode->i_blocks = 0;
1737         }
1738
1739         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1740         if (status < 0) {
1741                 mlog_errno(status);
1742                 goto bail;
1743         }
1744
1745         if (!ocfs2_inode_is_fast_symlink(inode)) {
1746                 status = ocfs2_create_symlink_data(osb, handle, inode,
1747                                                    symname);
1748                 if (status < 0) {
1749                         mlog_errno(status);
1750                         goto bail;
1751                 }
1752         }
1753
1754         if (si.enable) {
1755                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1756                                                  xattr_ac, data_ac);
1757                 if (status < 0) {
1758                         mlog_errno(status);
1759                         goto bail;
1760                 }
1761         }
1762
1763         status = ocfs2_add_entry(handle, dentry, inode,
1764                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
1765                                  &lookup);
1766         if (status < 0) {
1767                 mlog_errno(status);
1768                 goto bail;
1769         }
1770
1771         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1772         if (status) {
1773                 mlog_errno(status);
1774                 goto bail;
1775         }
1776
1777         insert_inode_hash(inode);
1778         dentry->d_op = &ocfs2_dentry_ops;
1779         d_instantiate(dentry, inode);
1780 bail:
1781         if (status < 0 && did_quota)
1782                 vfs_dq_free_space_nodirty(inode,
1783                                         ocfs2_clusters_to_bytes(osb->sb, 1));
1784         if (status < 0 && did_quota_inode)
1785                 vfs_dq_free_inode(inode);
1786         if (handle)
1787                 ocfs2_commit_trans(osb, handle);
1788
1789         ocfs2_inode_unlock(dir, 1);
1790
1791         brelse(new_fe_bh);
1792         brelse(parent_fe_bh);
1793         kfree(si.name);
1794         kfree(si.value);
1795         ocfs2_free_dir_lookup_result(&lookup);
1796         if (inode_ac)
1797                 ocfs2_free_alloc_context(inode_ac);
1798         if (data_ac)
1799                 ocfs2_free_alloc_context(data_ac);
1800         if (xattr_ac)
1801                 ocfs2_free_alloc_context(xattr_ac);
1802         if ((status < 0) && inode) {
1803                 clear_nlink(inode);
1804                 iput(inode);
1805         }
1806
1807         mlog_exit(status);
1808
1809         return status;
1810 }
1811
1812 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1813 {
1814         int status, namelen;
1815
1816         mlog_entry_void();
1817
1818         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1819                            (long long)blkno);
1820         if (namelen <= 0) {
1821                 if (namelen)
1822                         status = namelen;
1823                 else
1824                         status = -EINVAL;
1825                 mlog_errno(status);
1826                 goto bail;
1827         }
1828         if (namelen != OCFS2_ORPHAN_NAMELEN) {
1829                 status = -EINVAL;
1830                 mlog_errno(status);
1831                 goto bail;
1832         }
1833
1834         mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
1835              namelen);
1836
1837         status = 0;
1838 bail:
1839         mlog_exit(status);
1840         return status;
1841 }
1842
1843 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1844                                     struct inode **ret_orphan_dir,
1845                                     struct inode *inode,
1846                                     char *name,
1847                                     struct ocfs2_dir_lookup_result *lookup)
1848 {
1849         struct inode *orphan_dir_inode;
1850         struct buffer_head *orphan_dir_bh = NULL;
1851         int status = 0;
1852
1853         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
1854         if (status < 0) {
1855                 mlog_errno(status);
1856                 return status;
1857         }
1858
1859         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1860                                                        ORPHAN_DIR_SYSTEM_INODE,
1861                                                        osb->slot_num);
1862         if (!orphan_dir_inode) {
1863                 status = -ENOENT;
1864                 mlog_errno(status);
1865                 return status;
1866         }
1867
1868         mutex_lock(&orphan_dir_inode->i_mutex);
1869
1870         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1871         if (status < 0) {
1872                 mlog_errno(status);
1873                 goto leave;
1874         }
1875
1876         status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1877                                               orphan_dir_bh, name,
1878                                               OCFS2_ORPHAN_NAMELEN, lookup);
1879         if (status < 0) {
1880                 ocfs2_inode_unlock(orphan_dir_inode, 1);
1881
1882                 mlog_errno(status);
1883                 goto leave;
1884         }
1885
1886         *ret_orphan_dir = orphan_dir_inode;
1887
1888 leave:
1889         if (status) {
1890                 mutex_unlock(&orphan_dir_inode->i_mutex);
1891                 iput(orphan_dir_inode);
1892         }
1893
1894         brelse(orphan_dir_bh);
1895
1896         mlog_exit(status);
1897         return status;
1898 }
1899
1900 static int ocfs2_orphan_add(struct ocfs2_super *osb,
1901                             handle_t *handle,
1902                             struct inode *inode,
1903                             struct ocfs2_dinode *fe,
1904                             char *name,
1905                             struct ocfs2_dir_lookup_result *lookup,
1906                             struct inode *orphan_dir_inode)
1907 {
1908         struct buffer_head *orphan_dir_bh = NULL;
1909         int status = 0;
1910         struct ocfs2_dinode *orphan_fe;
1911
1912         mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
1913
1914         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
1915         if (status < 0) {
1916                 mlog_errno(status);
1917                 goto leave;
1918         }
1919
1920         status = ocfs2_journal_access_di(handle, orphan_dir_inode, orphan_dir_bh,
1921                                          OCFS2_JOURNAL_ACCESS_WRITE);
1922         if (status < 0) {
1923                 mlog_errno(status);
1924                 goto leave;
1925         }
1926
1927         /* we're a cluster, and nlink can change on disk from
1928          * underneath us... */
1929         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
1930         if (S_ISDIR(inode->i_mode))
1931                 ocfs2_add_links_count(orphan_fe, 1);
1932         orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
1933
1934         status = ocfs2_journal_dirty(handle, orphan_dir_bh);
1935         if (status < 0) {
1936                 mlog_errno(status);
1937                 goto leave;
1938         }
1939
1940         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
1941                                    OCFS2_ORPHAN_NAMELEN, inode,
1942                                    OCFS2_I(inode)->ip_blkno,
1943                                    orphan_dir_bh, lookup);
1944         if (status < 0) {
1945                 mlog_errno(status);
1946                 goto leave;
1947         }
1948
1949         le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
1950
1951         /* Record which orphan dir our inode now resides
1952          * in. delete_inode will use this to determine which orphan
1953          * dir to lock. */
1954         fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
1955
1956         mlog(0, "Inode %llu orphaned in slot %d\n",
1957              (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);
1958
1959 leave:
1960         brelse(orphan_dir_bh);
1961
1962         mlog_exit(status);
1963         return status;
1964 }
1965
1966 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
1967 int ocfs2_orphan_del(struct ocfs2_super *osb,
1968                      handle_t *handle,
1969                      struct inode *orphan_dir_inode,
1970                      struct inode *inode,
1971                      struct buffer_head *orphan_dir_bh)
1972 {
1973         char name[OCFS2_ORPHAN_NAMELEN + 1];
1974         struct ocfs2_dinode *orphan_fe;
1975         int status = 0;
1976         struct ocfs2_dir_lookup_result lookup = { NULL, };
1977
1978         mlog_entry_void();
1979
1980         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
1981         if (status < 0) {
1982                 mlog_errno(status);
1983                 goto leave;
1984         }
1985
1986         mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
1987              name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
1988              OCFS2_ORPHAN_NAMELEN);
1989
1990         /* find it's spot in the orphan directory */
1991         status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
1992                                   &lookup);
1993         if (status) {
1994                 mlog_errno(status);
1995                 goto leave;
1996         }
1997
1998         /* remove it from the orphan directory */
1999         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2000         if (status < 0) {
2001                 mlog_errno(status);
2002                 goto leave;
2003         }
2004
2005         status = ocfs2_journal_access_di(handle,orphan_dir_inode,  orphan_dir_bh,
2006                                          OCFS2_JOURNAL_ACCESS_WRITE);
2007         if (status < 0) {
2008                 mlog_errno(status);
2009                 goto leave;
2010         }
2011
2012         /* do the i_nlink dance! :) */
2013         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2014         if (S_ISDIR(inode->i_mode))
2015                 ocfs2_add_links_count(orphan_fe, -1);
2016         orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
2017
2018         status = ocfs2_journal_dirty(handle, orphan_dir_bh);
2019         if (status < 0) {
2020                 mlog_errno(status);
2021                 goto leave;
2022         }
2023
2024 leave:
2025         ocfs2_free_dir_lookup_result(&lookup);
2026
2027         mlog_exit(status);
2028         return status;
2029 }
2030
2031 const struct inode_operations ocfs2_dir_iops = {
2032         .create         = ocfs2_create,
2033         .lookup         = ocfs2_lookup,
2034         .link           = ocfs2_link,
2035         .unlink         = ocfs2_unlink,
2036         .rmdir          = ocfs2_unlink,
2037         .symlink        = ocfs2_symlink,
2038         .mkdir          = ocfs2_mkdir,
2039         .mknod          = ocfs2_mknod,
2040         .rename         = ocfs2_rename,
2041         .setattr        = ocfs2_setattr,
2042         .getattr        = ocfs2_getattr,
2043         .permission     = ocfs2_permission,
2044         .setxattr       = generic_setxattr,
2045         .getxattr       = generic_getxattr,
2046         .listxattr      = ocfs2_listxattr,
2047         .removexattr    = generic_removexattr,
2048 };