kernel/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 #include <cluster/masklog.h>
  46
  47 #include "ocfs2.h"
  48
  49 #include "alloc.h"
  50 #include "dcache.h"
  51 #include "dir.h"
  52 #include "dlmglue.h"
  53 #include "extent_map.h"
  54 #include "file.h"
  55 #include "inode.h"
  56 #include "journal.h"
  57 #include "namei.h"
  58 #include "suballoc.h"
  59 #include "super.h"
  60 #include "symlink.h"
  61 #include "sysfile.h"
  62 #include "uptodate.h"
  63 #include "xattr.h"
  64 #include "acl.h"
  65 #include "ocfs2_trace.h"
  66
  67 #include "buffer_head_io.h"
  68
  69 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
  70                               struct inode *dir,
  71                               struct inode *inode,
  72                               dev_t dev,
  73                               struct buffer_head **new_fe_bh,
  74                               struct buffer_head *parent_fe_bh,
  75                               handle_t *handle,
  76                               struct ocfs2_alloc_context *inode_ac);
  77
  78 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
  79                                     struct inode **ret_orphan_dir,
  80                                     u64 blkno,
  81                                     char *name,
  82                                     struct ocfs2_dir_lookup_result *lookup,
  83                                     bool dio);
  84
  85 static int ocfs2_orphan_add(struct ocfs2_super *osb,
  86                             handle_t *handle,
  87                             struct inode *inode,
  88                             struct buffer_head *fe_bh,
  89                             char *name,
  90                             struct ocfs2_dir_lookup_result *lookup,
  91                             struct inode *orphan_dir_inode,
  92                             bool dio);
  93
  94 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
  95                                      handle_t *handle,
  96                                      struct inode *inode,
  97                                      const char *symname);
  98
  99 static int ocfs2_double_lock(struct ocfs2_super *osb,
 100                              struct buffer_head **bh1,
 101                              struct inode *inode1,
 102                              struct buffer_head **bh2,
 103                              struct inode *inode2,
 104                              int rename);
 105
 106 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
 107 /* An orphan dir name is an 8 byte value, printed as a hex string */
 108 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
 109 #define OCFS2_DIO_ORPHAN_PREFIX "dio-"
 110 #define OCFS2_DIO_ORPHAN_PREFIX_LEN 4
 111
 112 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
 113                                    unsigned int flags)
 114 {
 115         int status;
 116         u64 blkno;
 117         struct inode *inode = NULL;
 118         struct dentry *ret;
 119         struct ocfs2_inode_info *oi;
 120
 121         trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
 122                            dentry->d_name.name,
 123                            (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
 124
 125         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
 126                 ret = ERR_PTR(-ENAMETOOLONG);
 127                 goto bail;
 128         }
 129
 130         status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
 131         if (status < 0) {
 132                 if (status != -ENOENT)
 133                         mlog_errno(status);
 134                 ret = ERR_PTR(status);
 135                 goto bail;
 136         }
 137
 138         status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
 139                                             dentry->d_name.len, &blkno);
 140         if (status < 0)
 141                 goto bail_add;
 142
 143         inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
 144         if (IS_ERR(inode)) {
 145                 ret = ERR_PTR(-EACCES);
 146                 goto bail_unlock;
 147         }
 148
 149         oi = OCFS2_I(inode);
 150         /* Clear any orphaned state... If we were able to look up the
 151          * inode from a directory, it certainly can't be orphaned. We
 152          * might have the bad state from a node which intended to
 153          * orphan this inode but crashed before it could commit the
 154          * unlink. */
 155         spin_lock(&oi->ip_lock);
 156         oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
 157         spin_unlock(&oi->ip_lock);
 158
 159 bail_add:
 160         ret = d_splice_alias(inode, dentry);
 161
 162         if (inode) {
 163                 /*
 164                  * If d_splice_alias() finds a DCACHE_DISCONNECTED
 165                  * dentry, it will d_move() it on top of ourse. The
 166                  * return value will indicate this however, so in
 167                  * those cases, we switch them around for the locking
 168                  * code.
 169                  *
 170                  * NOTE: This dentry already has ->d_op set from
 171                  * ocfs2_get_parent() and ocfs2_get_dentry()
 172                  */
 173                 if (!IS_ERR_OR_NULL(ret))
 174                         dentry = ret;
 175
 176                 status = ocfs2_dentry_attach_lock(dentry, inode,
 177                                                   OCFS2_I(dir)->ip_blkno);
 178                 if (status) {
 179                         mlog_errno(status);
 180                         ret = ERR_PTR(status);
 181                         goto bail_unlock;
 182                 }
 183         } else
 184                 ocfs2_dentry_attach_gen(dentry);
 185
 186 bail_unlock:
 187         /* Don't drop the cluster lock until *after* the d_add --
 188          * unlink on another node will message us to remove that
 189          * dentry under this lock so otherwise we can race this with
 190          * the downconvert thread and have a stale dentry. */
 191         ocfs2_inode_unlock(dir, 0);
 192
 193 bail:
 194
 195         trace_ocfs2_lookup_ret(ret);
 196
 197         return ret;
 198 }
 199
 200 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
 201 {
 202         struct inode *inode;
 203
 204         inode = new_inode(dir->i_sb);
 205         if (!inode) {
 206                 mlog(ML_ERROR, "new_inode failed!\n");
 207                 return NULL;
 208         }
 209
 210         /* populate as many fields early on as possible - many of
 211          * these are used by the support functions here and in
 212          * callers. */
 213         if (S_ISDIR(mode))
 214                 set_nlink(inode, 2);
 215         inode_init_owner(inode, dir, mode);
 216         dquot_initialize(inode);
 217         return inode;
 218 }
 219
 220 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
 221                 struct dentry *dentry, struct inode *inode)
 222 {
 223         struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
 224
 225         ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
 226         ocfs2_lock_res_free(&dl->dl_lockres);
 227         BUG_ON(dl->dl_count != 1);
 228         spin_lock(&dentry_attach_lock);
 229         dentry->d_fsdata = NULL;
 230         spin_unlock(&dentry_attach_lock);
 231         kfree(dl);
 232         iput(inode);
 233 }
 234
 235 static int ocfs2_mknod(struct inode *dir,
 236                        struct dentry *dentry,
 237                        umode_t mode,
 238                        dev_t dev)
 239 {
 240         int status = 0;
 241         struct buffer_head *parent_fe_bh = NULL;
 242         handle_t *handle = NULL;
 243         struct ocfs2_super *osb;
 244         struct ocfs2_dinode *dirfe;
 245         struct buffer_head *new_fe_bh = NULL;
 246         struct inode *inode = NULL;
 247         struct ocfs2_alloc_context *inode_ac = NULL;
 248         struct ocfs2_alloc_context *data_ac = NULL;
 249         struct ocfs2_alloc_context *meta_ac = NULL;
 250         int want_clusters = 0;
 251         int want_meta = 0;
 252         int xattr_credits = 0;
 253         struct ocfs2_security_xattr_info si = {
 254                 .enable = 1,
 255         };
 256         int did_quota_inode = 0;
 257         struct ocfs2_dir_lookup_result lookup = { NULL, };
 258         sigset_t oldset;
 259         int did_block_signals = 0;
 260         struct posix_acl *default_acl = NULL, *acl = NULL;
 261         struct ocfs2_dentry_lock *dl = NULL;
 262
 263         trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 264                           (unsigned long long)OCFS2_I(dir)->ip_blkno,
 265                           (unsigned long)dev, mode);
 266
 267         dquot_initialize(dir);
 268
 269         /* get our super block */
 270         osb = OCFS2_SB(dir->i_sb);
 271
 272         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
 273         if (status < 0) {
 274                 if (status != -ENOENT)
 275                         mlog_errno(status);
 276                 return status;
 277         }
 278
 279         if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
 280                 status = -EMLINK;
 281                 goto leave;
 282         }
 283
 284         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
 285         if (!ocfs2_read_links_count(dirfe)) {
 286                 /* can't make a file in a deleted directory. */
 287                 status = -ENOENT;
 288                 goto leave;
 289         }
 290
 291         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 292                                            dentry->d_name.len);
 293         if (status)
 294                 goto leave;
 295
 296         /* get a spot inside the dir. */
 297         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 298                                               dentry->d_name.name,
 299                                               dentry->d_name.len, &lookup);
 300         if (status < 0) {
 301                 mlog_errno(status);
 302                 goto leave;
 303         }
 304
 305         /* reserve an inode spot */
 306         status = ocfs2_reserve_new_inode(osb, &inode_ac);
 307         if (status < 0) {
 308                 if (status != -ENOSPC)
 309                         mlog_errno(status);
 310                 goto leave;
 311         }
 312
 313         inode = ocfs2_get_init_inode(dir, mode);
 314         if (!inode) {
 315                 status = -ENOMEM;
 316                 mlog_errno(status);
 317                 goto leave;
 318         }
 319
 320         /* get security xattr */
 321         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
 322         if (status) {
 323                 if (status == -EOPNOTSUPP)
 324                         si.enable = 0;
 325                 else {
 326                         mlog_errno(status);
 327                         goto leave;
 328                 }
 329         }
 330
 331         /* calculate meta data/clusters for setting security and acl xattr */
 332         status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
 333                                        &si, &want_clusters,
 334                                        &xattr_credits, &want_meta);
 335         if (status < 0) {
 336                 mlog_errno(status);
 337                 goto leave;
 338         }
 339
 340         /* Reserve a cluster if creating an extent based directory. */
 341         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
 342                 want_clusters += 1;
 343
 344                 /* Dir indexing requires extra space as well */
 345                 if (ocfs2_supports_indexed_dirs(osb))
 346                         want_meta++;
 347         }
 348
 349         status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
 350         if (status < 0) {
 351                 if (status != -ENOSPC)
 352                         mlog_errno(status);
 353                 goto leave;
 354         }
 355
 356         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
 357         if (status < 0) {
 358                 if (status != -ENOSPC)
 359                         mlog_errno(status);
 360                 goto leave;
 361         }
 362
 363         status = posix_acl_create(dir, &mode, &default_acl, &acl);
 364         if (status) {
 365                 mlog_errno(status);
 366                 goto leave;
 367         }
 368
 369         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
 370                                                             S_ISDIR(mode),
 371                                                             xattr_credits));
 372         if (IS_ERR(handle)) {
 373                 status = PTR_ERR(handle);
 374                 handle = NULL;
 375                 mlog_errno(status);
 376                 goto leave;
 377         }
 378
 379         /* Starting to change things, restart is no longer possible. */
 380         ocfs2_block_signals(&oldset);
 381         did_block_signals = 1;
 382
 383         status = dquot_alloc_inode(inode);
 384         if (status)
 385                 goto leave;
 386         did_quota_inode = 1;
 387
 388         /* do the real work now. */
 389         status = ocfs2_mknod_locked(osb, dir, inode, dev,
 390                                     &new_fe_bh, parent_fe_bh, handle,
 391                                     inode_ac);
 392         if (status < 0) {
 393                 mlog_errno(status);
 394                 goto leave;
 395         }
 396
 397         if (S_ISDIR(mode)) {
 398                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
 399                                             new_fe_bh, data_ac, meta_ac);
 400                 if (status < 0) {
 401                         mlog_errno(status);
 402                         goto leave;
 403                 }
 404
 405                 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
 406                                                  parent_fe_bh,
 407                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 408                 if (status < 0) {
 409                         mlog_errno(status);
 410                         goto leave;
 411                 }
 412                 ocfs2_add_links_count(dirfe, 1);
 413                 ocfs2_journal_dirty(handle, parent_fe_bh);
 414                 inc_nlink(dir);
 415         }
 416
 417         if (default_acl) {
 418                 status = ocfs2_set_acl(handle, inode, new_fe_bh,
 419                                        ACL_TYPE_DEFAULT, default_acl,
 420                                        meta_ac, data_ac);
 421         }
 422         if (!status && acl) {
 423                 status = ocfs2_set_acl(handle, inode, new_fe_bh,
 424                                        ACL_TYPE_ACCESS, acl,
 425                                        meta_ac, data_ac);
 426         }
 427
 428         if (status < 0) {
 429                 mlog_errno(status);
 430                 goto leave;
 431         }
 432
 433         if (si.enable) {
 434                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
 435                                                  meta_ac, data_ac);
 436                 if (status < 0) {
 437                         mlog_errno(status);
 438                         goto leave;
 439                 }
 440         }
 441
 442         /*
 443          * Do this before adding the entry to the directory. We add
 444          * also set d_op after success so that ->d_iput() will cleanup
 445          * the dentry lock even if ocfs2_add_entry() fails below.
 446          */
 447         status = ocfs2_dentry_attach_lock(dentry, inode,
 448                                           OCFS2_I(dir)->ip_blkno);
 449         if (status) {
 450                 mlog_errno(status);
 451                 goto leave;
 452         }
 453
 454         dl = dentry->d_fsdata;
 455
 456         status = ocfs2_add_entry(handle, dentry, inode,
 457                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
 458                                  &lookup);
 459         if (status < 0) {
 460                 mlog_errno(status);
 461                 goto leave;
 462         }
 463
 464         insert_inode_hash(inode);
 465         d_instantiate(dentry, inode);
 466         status = 0;
 467 leave:
 468         if (default_acl)
 469                 posix_acl_release(default_acl);
 470         if (acl)
 471                 posix_acl_release(acl);
 472         if (status < 0 && did_quota_inode)
 473                 dquot_free_inode(inode);
 474         if (handle)
 475                 ocfs2_commit_trans(osb, handle);
 476
 477         ocfs2_inode_unlock(dir, 1);
 478         if (did_block_signals)
 479                 ocfs2_unblock_signals(&oldset);
 480
 481         brelse(new_fe_bh);
 482         brelse(parent_fe_bh);
 483         kfree(si.value);
 484
 485         ocfs2_free_dir_lookup_result(&lookup);
 486
 487         if (inode_ac)
 488                 ocfs2_free_alloc_context(inode_ac);
 489
 490         if (data_ac)
 491                 ocfs2_free_alloc_context(data_ac);
 492
 493         if (meta_ac)
 494                 ocfs2_free_alloc_context(meta_ac);
 495
 496         /*
 497          * We should call iput after the i_mutex of the bitmap been
 498          * unlocked in ocfs2_free_alloc_context, or the
 499          * ocfs2_delete_inode will mutex_lock again.
 500          */
 501         if ((status < 0) && inode) {
 502                 if (dl)
 503                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
 504
 505                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
 506                 clear_nlink(inode);
 507                 iput(inode);
 508         }
 509
 510         if (status)
 511                 mlog_errno(status);
 512
 513         return status;
 514 }
 515
 516 static int __ocfs2_mknod_locked(struct inode *dir,
 517                                 struct inode *inode,
 518                                 dev_t dev,
 519                                 struct buffer_head **new_fe_bh,
 520                                 struct buffer_head *parent_fe_bh,
 521                                 handle_t *handle,
 522                                 struct ocfs2_alloc_context *inode_ac,
 523                                 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
 524 {
 525         int status = 0;
 526         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 527         struct ocfs2_dinode *fe = NULL;
 528         struct ocfs2_extent_list *fel;
 529         u16 feat;
 530         struct ocfs2_inode_info *oi = OCFS2_I(inode);
 531
 532         *new_fe_bh = NULL;
 533
 534         /* populate as many fields early on as possible - many of
 535          * these are used by the support functions here and in
 536          * callers. */
 537         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
 538         OCFS2_I(inode)->ip_blkno = fe_blkno;
 539         spin_lock(&osb->osb_lock);
 540         inode->i_generation = osb->s_next_generation++;
 541         spin_unlock(&osb->osb_lock);
 542
 543         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
 544         if (!*new_fe_bh) {
 545                 status = -ENOMEM;
 546                 mlog_errno(status);
 547                 goto leave;
 548         }
 549         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
 550
 551         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
 552                                          *new_fe_bh,
 553                                          OCFS2_JOURNAL_ACCESS_CREATE);
 554         if (status < 0) {
 555                 mlog_errno(status);
 556                 goto leave;
 557         }
 558
 559         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
 560         memset(fe, 0, osb->sb->s_blocksize);
 561
 562         fe->i_generation = cpu_to_le32(inode->i_generation);
 563         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
 564         fe->i_blkno = cpu_to_le64(fe_blkno);
 565         fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
 566         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
 567         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
 568         fe->i_uid = cpu_to_le32(i_uid_read(inode));
 569         fe->i_gid = cpu_to_le32(i_gid_read(inode));
 570         fe->i_mode = cpu_to_le16(inode->i_mode);
 571         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 572                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
 573
 574         ocfs2_set_links_count(fe, inode->i_nlink);
 575
 576         fe->i_last_eb_blk = 0;
 577         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 578         fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
 579         fe->i_atime = fe->i_ctime = fe->i_mtime =
 580                 cpu_to_le64(CURRENT_TIME.tv_sec);
 581         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
 582                 cpu_to_le32(CURRENT_TIME.tv_nsec);
 583         fe->i_dtime = 0;
 584
 585         /*
 586          * If supported, directories start with inline data. If inline
 587          * isn't supported, but indexing is, we start them as indexed.
 588          */
 589         feat = le16_to_cpu(fe->i_dyn_features);
 590         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
 591                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
 592
 593                 fe->id2.i_data.id_count = cpu_to_le16(
 594                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
 595         } else {
 596                 fel = &fe->id2.i_list;
 597                 fel->l_tree_depth = 0;
 598                 fel->l_next_free_rec = 0;
 599                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
 600         }
 601
 602         ocfs2_journal_dirty(handle, *new_fe_bh);
 603
 604         ocfs2_populate_inode(inode, fe, 1);
 605         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
 606         if (!ocfs2_mount_local(osb)) {
 607                 status = ocfs2_create_new_inode_locks(inode);
 608                 if (status < 0)
 609                         mlog_errno(status);
 610         }
 611
 612         oi->i_sync_tid = handle->h_transaction->t_tid;
 613         oi->i_datasync_tid = handle->h_transaction->t_tid;
 614
 615 leave:
 616         if (status < 0) {
 617                 if (*new_fe_bh) {
 618                         brelse(*new_fe_bh);
 619                         *new_fe_bh = NULL;
 620                 }
 621         }
 622
 623         if (status)
 624                 mlog_errno(status);
 625         return status;
 626 }
 627
 628 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 629                               struct inode *dir,
 630                               struct inode *inode,
 631                               dev_t dev,
 632                               struct buffer_head **new_fe_bh,
 633                               struct buffer_head *parent_fe_bh,
 634                               handle_t *handle,
 635                               struct ocfs2_alloc_context *inode_ac)
 636 {
 637         int status = 0;
 638         u64 suballoc_loc, fe_blkno = 0;
 639         u16 suballoc_bit;
 640
 641         *new_fe_bh = NULL;
 642
 643         status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
 644                                        inode_ac, &suballoc_loc,
 645                                        &suballoc_bit, &fe_blkno);
 646         if (status < 0) {
 647                 mlog_errno(status);
 648                 return status;
 649         }
 650
 651         return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
 652                                     parent_fe_bh, handle, inode_ac,
 653                                     fe_blkno, suballoc_loc, suballoc_bit);
 654 }
 655
 656 static int ocfs2_mkdir(struct inode *dir,
 657                        struct dentry *dentry,
 658                        umode_t mode)
 659 {
 660         int ret;
 661
 662         trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 663                           OCFS2_I(dir)->ip_blkno, mode);
 664         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
 665         if (ret)
 666                 mlog_errno(ret);
 667
 668         return ret;
 669 }
 670
 671 static int ocfs2_create(struct inode *dir,
 672                         struct dentry *dentry,
 673                         umode_t mode,
 674                         bool excl)
 675 {
 676         int ret;
 677
 678         trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 679                            (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
 680         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
 681         if (ret)
 682                 mlog_errno(ret);
 683
 684         return ret;
 685 }
 686
 687 static int ocfs2_link(struct dentry *old_dentry,
 688                       struct inode *dir,
 689                       struct dentry *dentry)
 690 {
 691         handle_t *handle;
 692         struct inode *inode = d_inode(old_dentry);
 693         struct inode *old_dir = d_inode(old_dentry->d_parent);
 694         int err;
 695         struct buffer_head *fe_bh = NULL;
 696         struct buffer_head *old_dir_bh = NULL;
 697         struct buffer_head *parent_fe_bh = NULL;
 698         struct ocfs2_dinode *fe = NULL;
 699         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 700         struct ocfs2_dir_lookup_result lookup = { NULL, };
 701         sigset_t oldset;
 702         u64 old_de_ino;
 703
 704         trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
 705                          old_dentry->d_name.len, old_dentry->d_name.name,
 706                          dentry->d_name.len, dentry->d_name.name);
 707
 708         if (S_ISDIR(inode->i_mode))
 709                 return -EPERM;
 710
 711         dquot_initialize(dir);
 712
 713         err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
 714                         &parent_fe_bh, dir, 0);
 715         if (err < 0) {
 716                 if (err != -ENOENT)
 717                         mlog_errno(err);
 718                 return err;
 719         }
 720
 721         /* make sure both dirs have bhs
 722          * get an extra ref on old_dir_bh if old==new */
 723         if (!parent_fe_bh) {
 724                 if (old_dir_bh) {
 725                         parent_fe_bh = old_dir_bh;
 726                         get_bh(parent_fe_bh);
 727                 } else {
 728                         mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
 729                         err = -EIO;
 730                         goto out;
 731                 }
 732         }
 733
 734         if (!dir->i_nlink) {
 735                 err = -ENOENT;
 736                 goto out;
 737         }
 738
 739         err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
 740                         old_dentry->d_name.len, &old_de_ino);
 741         if (err) {
 742                 err = -ENOENT;
 743                 goto out;
 744         }
 745
 746         /*
 747          * Check whether another node removed the source inode while we
 748          * were in the vfs.
 749          */
 750         if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
 751                 err = -ENOENT;
 752                 goto out;
 753         }
 754
 755         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 756                                         dentry->d_name.len);
 757         if (err)
 758                 goto out;
 759
 760         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 761                                            dentry->d_name.name,
 762                                            dentry->d_name.len, &lookup);
 763         if (err < 0) {
 764                 mlog_errno(err);
 765                 goto out;
 766         }
 767
 768         err = ocfs2_inode_lock(inode, &fe_bh, 1);
 769         if (err < 0) {
 770                 if (err != -ENOENT)
 771                         mlog_errno(err);
 772                 goto out;
 773         }
 774
 775         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 776         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
 777                 err = -EMLINK;
 778                 goto out_unlock_inode;
 779         }
 780
 781         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
 782         if (IS_ERR(handle)) {
 783                 err = PTR_ERR(handle);
 784                 handle = NULL;
 785                 mlog_errno(err);
 786                 goto out_unlock_inode;
 787         }
 788
 789         /* Starting to change things, restart is no longer possible. */
 790         ocfs2_block_signals(&oldset);
 791
 792         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 793                                       OCFS2_JOURNAL_ACCESS_WRITE);
 794         if (err < 0) {
 795                 mlog_errno(err);
 796                 goto out_commit;
 797         }
 798
 799         inc_nlink(inode);
 800         inode->i_ctime = CURRENT_TIME;
 801         ocfs2_set_links_count(fe, inode->i_nlink);
 802         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 803         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 804         ocfs2_journal_dirty(handle, fe_bh);
 805
 806         err = ocfs2_add_entry(handle, dentry, inode,
 807                               OCFS2_I(inode)->ip_blkno,
 808                               parent_fe_bh, &lookup);
 809         if (err) {
 810                 ocfs2_add_links_count(fe, -1);
 811                 drop_nlink(inode);
 812                 mlog_errno(err);
 813                 goto out_commit;
 814         }
 815
 816         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
 817         if (err) {
 818                 mlog_errno(err);
 819                 goto out_commit;
 820         }
 821
 822         ihold(inode);
 823         d_instantiate(dentry, inode);
 824
 825 out_commit:
 826         ocfs2_commit_trans(osb, handle);
 827         ocfs2_unblock_signals(&oldset);
 828 out_unlock_inode:
 829         ocfs2_inode_unlock(inode, 1);
 830
 831 out:
 832         ocfs2_double_unlock(old_dir, dir);
 833
 834         brelse(fe_bh);
 835         brelse(parent_fe_bh);
 836         brelse(old_dir_bh);
 837
 838         ocfs2_free_dir_lookup_result(&lookup);
 839
 840         if (err)
 841                 mlog_errno(err);
 842
 843         return err;
 844 }
 845
 846 /*
 847  * Takes and drops an exclusive lock on the given dentry. This will
 848  * force other nodes to drop it.
 849  */
 850 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 851 {
 852         int ret;
 853
 854         ret = ocfs2_dentry_lock(dentry, 1);
 855         if (ret)
 856                 mlog_errno(ret);
 857         else
 858                 ocfs2_dentry_unlock(dentry, 1);
 859
 860         return ret;
 861 }
 862
 863 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
 864 {
 865         if (S_ISDIR(inode->i_mode)) {
 866                 if (inode->i_nlink == 2)
 867                         return 1;
 868                 return 0;
 869         }
 870
 871         if (inode->i_nlink == 1)
 872                 return 1;
 873         return 0;
 874 }
 875
 876 static int ocfs2_unlink(struct inode *dir,
 877                         struct dentry *dentry)
 878 {
 879         int status;
 880         int child_locked = 0;
 881         bool is_unlinkable = false;
 882         struct inode *inode = d_inode(dentry);
 883         struct inode *orphan_dir = NULL;
 884         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 885         u64 blkno;
 886         struct ocfs2_dinode *fe = NULL;
 887         struct buffer_head *fe_bh = NULL;
 888         struct buffer_head *parent_node_bh = NULL;
 889         handle_t *handle = NULL;
 890         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 891         struct ocfs2_dir_lookup_result lookup = { NULL, };
 892         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
 893
 894         trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
 895                            dentry->d_name.name,
 896                            (unsigned long long)OCFS2_I(dir)->ip_blkno,
 897                            (unsigned long long)OCFS2_I(inode)->ip_blkno);
 898
 899         dquot_initialize(dir);
 900
 901         BUG_ON(d_inode(dentry->d_parent) != dir);
 902
 903         if (inode == osb->root_inode)
 904                 return -EPERM;
 905
 906         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
 907                                          OI_LS_PARENT);
 908         if (status < 0) {
 909                 if (status != -ENOENT)
 910                         mlog_errno(status);
 911                 return status;
 912         }
 913
 914         status = ocfs2_find_files_on_disk(dentry->d_name.name,
 915                                           dentry->d_name.len, &blkno, dir,
 916                                           &lookup);
 917         if (status < 0) {
 918                 if (status != -ENOENT)
 919                         mlog_errno(status);
 920                 goto leave;
 921         }
 922
 923         if (OCFS2_I(inode)->ip_blkno != blkno) {
 924                 status = -ENOENT;
 925
 926                 trace_ocfs2_unlink_noent(
 927                                 (unsigned long long)OCFS2_I(inode)->ip_blkno,
 928                                 (unsigned long long)blkno,
 929                                 OCFS2_I(inode)->ip_flags);
 930                 goto leave;
 931         }
 932
 933         status = ocfs2_inode_lock(inode, &fe_bh, 1);
 934         if (status < 0) {
 935                 if (status != -ENOENT)
 936                         mlog_errno(status);
 937                 goto leave;
 938         }
 939         child_locked = 1;
 940
 941         if (S_ISDIR(inode->i_mode)) {
 942                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
 943                         status = -ENOTEMPTY;
 944                         goto leave;
 945                 }
 946         }
 947
 948         status = ocfs2_remote_dentry_delete(dentry);
 949         if (status < 0) {
 950                 /* This remote delete should succeed under all normal
 951                  * circumstances. */
 952                 mlog_errno(status);
 953                 goto leave;
 954         }
 955
 956         if (ocfs2_inode_is_unlinkable(inode)) {
 957                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
 958                                                   OCFS2_I(inode)->ip_blkno,
 959                                                   orphan_name, &orphan_insert,
 960                                                   false);
 961                 if (status < 0) {
 962                         mlog_errno(status);
 963                         goto leave;
 964                 }
 965                 is_unlinkable = true;
 966         }
 967
 968         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
 969         if (IS_ERR(handle)) {
 970                 status = PTR_ERR(handle);
 971                 handle = NULL;
 972                 mlog_errno(status);
 973                 goto leave;
 974         }
 975
 976         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 977                                          OCFS2_JOURNAL_ACCESS_WRITE);
 978         if (status < 0) {
 979                 mlog_errno(status);
 980                 goto leave;
 981         }
 982
 983         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 984
 985         /* delete the name from the parent dir */
 986         status = ocfs2_delete_entry(handle, dir, &lookup);
 987         if (status < 0) {
 988                 mlog_errno(status);
 989                 goto leave;
 990         }
 991
 992         if (S_ISDIR(inode->i_mode))
 993                 drop_nlink(inode);
 994         drop_nlink(inode);
 995         ocfs2_set_links_count(fe, inode->i_nlink);
 996         ocfs2_journal_dirty(handle, fe_bh);
 997
 998         dir->i_ctime = dir->i_mtime = CURRENT_TIME;
 999         if (S_ISDIR(inode->i_mode))
1000                 drop_nlink(dir);
1001
1002         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1003         if (status < 0) {
1004                 mlog_errno(status);
1005                 if (S_ISDIR(inode->i_mode))
1006                         inc_nlink(dir);
1007                 goto leave;
1008         }
1009
1010         if (is_unlinkable) {
1011                 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1012                                 orphan_name, &orphan_insert, orphan_dir, false);
1013                 if (status < 0)
1014                         mlog_errno(status);
1015         }
1016
1017 leave:
1018         if (handle)
1019                 ocfs2_commit_trans(osb, handle);
1020
1021         if (child_locked)
1022                 ocfs2_inode_unlock(inode, 1);
1023
1024         ocfs2_inode_unlock(dir, 1);
1025
1026         if (orphan_dir) {
1027                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1028                 ocfs2_inode_unlock(orphan_dir, 1);
1029                 mutex_unlock(&orphan_dir->i_mutex);
1030                 iput(orphan_dir);
1031         }
1032
1033         brelse(fe_bh);
1034         brelse(parent_node_bh);
1035
1036         ocfs2_free_dir_lookup_result(&orphan_insert);
1037         ocfs2_free_dir_lookup_result(&lookup);
1038
1039         if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1040                 mlog_errno(status);
1041
1042         return status;
1043 }
1044
1045 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1046                 u64 src_inode_no, u64 dest_inode_no)
1047 {
1048         int ret = 0, i = 0;
1049         u64 parent_inode_no = 0;
1050         u64 child_inode_no = src_inode_no;
1051         struct inode *child_inode;
1052
1053 #define MAX_LOOKUP_TIMES 32
1054         while (1) {
1055                 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1056                 if (IS_ERR(child_inode)) {
1057                         ret = PTR_ERR(child_inode);
1058                         break;
1059                 }
1060
1061                 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1062                 if (ret < 0) {
1063                         iput(child_inode);
1064                         if (ret != -ENOENT)
1065                                 mlog_errno(ret);
1066                         break;
1067                 }
1068
1069                 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1070                                 &parent_inode_no);
1071                 ocfs2_inode_unlock(child_inode, 0);
1072                 iput(child_inode);
1073                 if (ret < 0) {
1074                         ret = -ENOENT;
1075                         break;
1076                 }
1077
1078                 if (parent_inode_no == dest_inode_no) {
1079                         ret = 1;
1080                         break;
1081                 }
1082
1083                 if (parent_inode_no == osb->root_inode->i_ino) {
1084                         ret = 0;
1085                         break;
1086                 }
1087
1088                 child_inode_no = parent_inode_no;
1089
1090                 if (++i >= MAX_LOOKUP_TIMES) {
1091                         mlog(ML_NOTICE, "max lookup times reached, filesystem "
1092                                         "may have nested directories, "
1093                                         "src inode: %llu, dest inode: %llu.\n",
1094                                         (unsigned long long)src_inode_no,
1095                                         (unsigned long long)dest_inode_no);
1096                         ret = 0;
1097                         break;
1098                 }
1099         }
1100
1101         return ret;
1102 }
1103
1104 /*
1105  * The only place this should be used is rename and link!
1106  * if they have the same id, then the 1st one is the only one locked.
1107  */
1108 static int ocfs2_double_lock(struct ocfs2_super *osb,
1109                              struct buffer_head **bh1,
1110                              struct inode *inode1,
1111                              struct buffer_head **bh2,
1112                              struct inode *inode2,
1113                              int rename)
1114 {
1115         int status;
1116         int inode1_is_ancestor, inode2_is_ancestor;
1117         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1118         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1119         struct buffer_head **tmpbh;
1120         struct inode *tmpinode;
1121
1122         trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1123                                 (unsigned long long)oi2->ip_blkno);
1124
1125         if (*bh1)
1126                 *bh1 = NULL;
1127         if (*bh2)
1128                 *bh2 = NULL;
1129
1130         /* we always want to lock the one with the lower lockid first.
1131          * and if they are nested, we lock ancestor first */
1132         if (oi1->ip_blkno != oi2->ip_blkno) {
1133                 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1134                                 oi1->ip_blkno);
1135                 if (inode1_is_ancestor < 0) {
1136                         status = inode1_is_ancestor;
1137                         goto bail;
1138                 }
1139
1140                 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1141                                 oi2->ip_blkno);
1142                 if (inode2_is_ancestor < 0) {
1143                         status = inode2_is_ancestor;
1144                         goto bail;
1145                 }
1146
1147                 if ((inode1_is_ancestor == 1) ||
1148                                 (oi1->ip_blkno < oi2->ip_blkno &&
1149                                 inode2_is_ancestor == 0)) {
1150                         /* switch id1 and id2 around */
1151                         tmpbh = bh2;
1152                         bh2 = bh1;
1153                         bh1 = tmpbh;
1154
1155                         tmpinode = inode2;
1156                         inode2 = inode1;
1157                         inode1 = tmpinode;
1158                 }
1159                 /* lock id2 */
1160                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1161                                 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1162                 if (status < 0) {
1163                         if (status != -ENOENT)
1164                                 mlog_errno(status);
1165                         goto bail;
1166                 }
1167         }
1168
1169         /* lock id1 */
1170         status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1171                         rename == 1 ?  OI_LS_RENAME2 : OI_LS_PARENT);
1172         if (status < 0) {
1173                 /*
1174                  * An error return must mean that no cluster locks
1175                  * were held on function exit.
1176                  */
1177                 if (oi1->ip_blkno != oi2->ip_blkno) {
1178                         ocfs2_inode_unlock(inode2, 1);
1179                         brelse(*bh2);
1180                         *bh2 = NULL;
1181                 }
1182
1183                 if (status != -ENOENT)
1184                         mlog_errno(status);
1185         }
1186
1187         trace_ocfs2_double_lock_end(
1188                         (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1189                         (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1190
1191 bail:
1192         if (status)
1193                 mlog_errno(status);
1194         return status;
1195 }
1196
1197 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1198 {
1199         ocfs2_inode_unlock(inode1, 1);
1200
1201         if (inode1 != inode2)
1202                 ocfs2_inode_unlock(inode2, 1);
1203 }
1204
1205 static int ocfs2_rename(struct inode *old_dir,
1206                         struct dentry *old_dentry,
1207                         struct inode *new_dir,
1208                         struct dentry *new_dentry)
1209 {
1210         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1211         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1212         struct inode *old_inode = d_inode(old_dentry);
1213         struct inode *new_inode = d_inode(new_dentry);
1214         struct inode *orphan_dir = NULL;
1215         struct ocfs2_dinode *newfe = NULL;
1216         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1217         struct buffer_head *newfe_bh = NULL;
1218         struct buffer_head *old_inode_bh = NULL;
1219         struct ocfs2_super *osb = NULL;
1220         u64 newfe_blkno, old_de_ino;
1221         handle_t *handle = NULL;
1222         struct buffer_head *old_dir_bh = NULL;
1223         struct buffer_head *new_dir_bh = NULL;
1224         u32 old_dir_nlink = old_dir->i_nlink;
1225         struct ocfs2_dinode *old_di;
1226         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1227         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1228         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1229         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1230         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1231         bool should_add_orphan = false;
1232
1233         /* At some point it might be nice to break this function up a
1234          * bit. */
1235
1236         trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1237                            old_dentry->d_name.len, old_dentry->d_name.name,
1238                            new_dentry->d_name.len, new_dentry->d_name.name);
1239
1240         dquot_initialize(old_dir);
1241         dquot_initialize(new_dir);
1242
1243         osb = OCFS2_SB(old_dir->i_sb);
1244
1245         if (new_inode) {
1246                 if (!igrab(new_inode))
1247                         BUG();
1248         }
1249
1250         /* Assume a directory hierarchy thusly:
1251          * a/b/c
1252          * a/d
1253          * a,b,c, and d are all directories.
1254          *
1255          * from cwd of 'a' on both nodes:
1256          * node1: mv b/c d
1257          * node2: mv d   b/c
1258          *
1259          * And that's why, just like the VFS, we need a file system
1260          * rename lock. */
1261         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1262                 status = ocfs2_rename_lock(osb);
1263                 if (status < 0) {
1264                         mlog_errno(status);
1265                         goto bail;
1266                 }
1267                 rename_lock = 1;
1268
1269                 /* here we cannot guarantee the inodes haven't just been
1270                  * changed, so check if they are nested again */
1271                 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1272                                 old_inode->i_ino);
1273                 if (status < 0) {
1274                         mlog_errno(status);
1275                         goto bail;
1276                 } else if (status == 1) {
1277                         status = -EPERM;
1278                         trace_ocfs2_rename_not_permitted(
1279                                         (unsigned long long)old_inode->i_ino,
1280                                         (unsigned long long)new_dir->i_ino);
1281                         goto bail;
1282                 }
1283         }
1284
1285         /* if old and new are the same, this'll just do one lock. */
1286         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1287                                    &new_dir_bh, new_dir, 1);
1288         if (status < 0) {
1289                 mlog_errno(status);
1290                 goto bail;
1291         }
1292         parents_locked = 1;
1293
1294         /* make sure both dirs have bhs
1295          * get an extra ref on old_dir_bh if old==new */
1296         if (!new_dir_bh) {
1297                 if (old_dir_bh) {
1298                         new_dir_bh = old_dir_bh;
1299                         get_bh(new_dir_bh);
1300                 } else {
1301                         mlog(ML_ERROR, "no old_dir_bh!\n");
1302                         status = -EIO;
1303                         goto bail;
1304                 }
1305         }
1306
1307         /*
1308          * Aside from allowing a meta data update, the locking here
1309          * also ensures that the downconvert thread on other nodes
1310          * won't have to concurrently downconvert the inode and the
1311          * dentry locks.
1312          */
1313         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1314                                          OI_LS_PARENT);
1315         if (status < 0) {
1316                 if (status != -ENOENT)
1317                         mlog_errno(status);
1318                 goto bail;
1319         }
1320         old_child_locked = 1;
1321
1322         status = ocfs2_remote_dentry_delete(old_dentry);
1323         if (status < 0) {
1324                 mlog_errno(status);
1325                 goto bail;
1326         }
1327
1328         if (S_ISDIR(old_inode->i_mode)) {
1329                 u64 old_inode_parent;
1330
1331                 update_dot_dot = 1;
1332                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1333                                                   old_inode,
1334                                                   &old_inode_dot_dot_res);
1335                 if (status) {
1336                         status = -EIO;
1337                         goto bail;
1338                 }
1339
1340                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1341                         status = -EIO;
1342                         goto bail;
1343                 }
1344
1345                 if (!new_inode && new_dir != old_dir &&
1346                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1347                         status = -EMLINK;
1348                         goto bail;
1349                 }
1350         }
1351
1352         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1353                                             old_dentry->d_name.len,
1354                                             &old_de_ino);
1355         if (status) {
1356                 status = -ENOENT;
1357                 goto bail;
1358         }
1359
1360         /*
1361          *  Check for inode number is _not_ due to possible IO errors.
1362          *  We might rmdir the source, keep it as pwd of some process
1363          *  and merrily kill the link to whatever was created under the
1364          *  same name. Goodbye sticky bit ;-<
1365          */
1366         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1367                 status = -ENOENT;
1368                 goto bail;
1369         }
1370
1371         /* check if the target already exists (in which case we need
1372          * to delete it */
1373         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1374                                           new_dentry->d_name.len,
1375                                           &newfe_blkno, new_dir,
1376                                           &target_lookup_res);
1377         /* The only error we allow here is -ENOENT because the new
1378          * file not existing is perfectly valid. */
1379         if ((status < 0) && (status != -ENOENT)) {
1380                 /* If we cannot find the file specified we should just */
1381                 /* return the error... */
1382                 mlog_errno(status);
1383                 goto bail;
1384         }
1385         if (status == 0)
1386                 target_exists = 1;
1387
1388         if (!target_exists && new_inode) {
1389                 /*
1390                  * Target was unlinked by another node while we were
1391                  * waiting to get to ocfs2_rename(). There isn't
1392                  * anything we can do here to help the situation, so
1393                  * bubble up the appropriate error.
1394                  */
1395                 status = -ENOENT;
1396                 goto bail;
1397         }
1398
1399         /* In case we need to overwrite an existing file, we blow it
1400          * away first */
1401         if (target_exists) {
1402                 /* VFS didn't think there existed an inode here, but
1403                  * someone else in the cluster must have raced our
1404                  * rename to create one. Today we error cleanly, in
1405                  * the future we should consider calling iget to build
1406                  * a new struct inode for this entry. */
1407                 if (!new_inode) {
1408                         status = -EACCES;
1409
1410                         trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1411                                                 new_dentry->d_name.name);
1412                         goto bail;
1413                 }
1414
1415                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1416                         status = -EACCES;
1417
1418                         trace_ocfs2_rename_disagree(
1419                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1420                              (unsigned long long)newfe_blkno,
1421                              OCFS2_I(new_inode)->ip_flags);
1422                         goto bail;
1423                 }
1424
1425                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1426                 if (status < 0) {
1427                         if (status != -ENOENT)
1428                                 mlog_errno(status);
1429                         goto bail;
1430                 }
1431                 new_child_locked = 1;
1432
1433                 status = ocfs2_remote_dentry_delete(new_dentry);
1434                 if (status < 0) {
1435                         mlog_errno(status);
1436                         goto bail;
1437                 }
1438
1439                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1440
1441                 trace_ocfs2_rename_over_existing(
1442                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1443                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1444
1445                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1446                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1447                                                 OCFS2_I(new_inode)->ip_blkno,
1448                                                 orphan_name, &orphan_insert,
1449                                                 false);
1450                         if (status < 0) {
1451                                 mlog_errno(status);
1452                                 goto bail;
1453                         }
1454                         should_add_orphan = true;
1455                 }
1456         } else {
1457                 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1458
1459                 status = ocfs2_check_dir_for_entry(new_dir,
1460                                                    new_dentry->d_name.name,
1461                                                    new_dentry->d_name.len);
1462                 if (status)
1463                         goto bail;
1464
1465                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1466                                                       new_dentry->d_name.name,
1467                                                       new_dentry->d_name.len,
1468                                                       &target_insert);
1469                 if (status < 0) {
1470                         mlog_errno(status);
1471                         goto bail;
1472                 }
1473         }
1474
1475         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1476         if (IS_ERR(handle)) {
1477                 status = PTR_ERR(handle);
1478                 handle = NULL;
1479                 mlog_errno(status);
1480                 goto bail;
1481         }
1482
1483         if (target_exists) {
1484                 if (S_ISDIR(new_inode->i_mode)) {
1485                         if (new_inode->i_nlink != 2 ||
1486                             !ocfs2_empty_dir(new_inode)) {
1487                                 status = -ENOTEMPTY;
1488                                 goto bail;
1489                         }
1490                 }
1491                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1492                                                  newfe_bh,
1493                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1494                 if (status < 0) {
1495                         mlog_errno(status);
1496                         goto bail;
1497                 }
1498
1499                 /* change the dirent to point to the correct inode */
1500                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1501                                             old_inode);
1502                 if (status < 0) {
1503                         mlog_errno(status);
1504                         goto bail;
1505                 }
1506                 new_dir->i_version++;
1507
1508                 if (S_ISDIR(new_inode->i_mode))
1509                         ocfs2_set_links_count(newfe, 0);
1510                 else
1511                         ocfs2_add_links_count(newfe, -1);
1512                 ocfs2_journal_dirty(handle, newfe_bh);
1513                 if (should_add_orphan) {
1514                         status = ocfs2_orphan_add(osb, handle, new_inode,
1515                                         newfe_bh, orphan_name,
1516                                         &orphan_insert, orphan_dir, false);
1517                         if (status < 0) {
1518                                 mlog_errno(status);
1519                                 goto bail;
1520                         }
1521                 }
1522         } else {
1523                 /* if the name was not found in new_dir, add it now */
1524                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1525                                          OCFS2_I(old_inode)->ip_blkno,
1526                                          new_dir_bh, &target_insert);
1527         }
1528
1529         old_inode->i_ctime = CURRENT_TIME;
1530         mark_inode_dirty(old_inode);
1531
1532         status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1533                                          old_inode_bh,
1534                                          OCFS2_JOURNAL_ACCESS_WRITE);
1535         if (status >= 0) {
1536                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1537
1538                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1539                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1540                 ocfs2_journal_dirty(handle, old_inode_bh);
1541         } else
1542                 mlog_errno(status);
1543
1544         /*
1545          * Now that the name has been added to new_dir, remove the old name.
1546          *
1547          * We don't keep any directory entry context around until now
1548          * because the insert might have changed the type of directory
1549          * we're dealing with.
1550          */
1551         status = ocfs2_find_entry(old_dentry->d_name.name,
1552                                   old_dentry->d_name.len, old_dir,
1553                                   &old_entry_lookup);
1554         if (status)
1555                 goto bail;
1556
1557         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1558         if (status < 0) {
1559                 mlog_errno(status);
1560                 goto bail;
1561         }
1562
1563         if (new_inode) {
1564                 drop_nlink(new_inode);
1565                 new_inode->i_ctime = CURRENT_TIME;
1566         }
1567         old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1568
1569         if (update_dot_dot) {
1570                 status = ocfs2_update_entry(old_inode, handle,
1571                                             &old_inode_dot_dot_res, new_dir);
1572                 drop_nlink(old_dir);
1573                 if (new_inode) {
1574                         drop_nlink(new_inode);
1575                 } else {
1576                         inc_nlink(new_dir);
1577                         mark_inode_dirty(new_dir);
1578                 }
1579         }
1580         mark_inode_dirty(old_dir);
1581         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1582         if (new_inode) {
1583                 mark_inode_dirty(new_inode);
1584                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1585         }
1586
1587         if (old_dir != new_dir) {
1588                 /* Keep the same times on both directories.*/
1589                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1590
1591                 /*
1592                  * This will also pick up the i_nlink change from the
1593                  * block above.
1594                  */
1595                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1596         }
1597
1598         if (old_dir_nlink != old_dir->i_nlink) {
1599                 if (!old_dir_bh) {
1600                         mlog(ML_ERROR, "need to change nlink for old dir "
1601                              "%llu from %d to %d but bh is NULL!\n",
1602                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1603                              (int)old_dir_nlink, old_dir->i_nlink);
1604                 } else {
1605                         struct ocfs2_dinode *fe;
1606                         status = ocfs2_journal_access_di(handle,
1607                                                          INODE_CACHE(old_dir),
1608                                                          old_dir_bh,
1609                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1610                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1611                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1612                         ocfs2_journal_dirty(handle, old_dir_bh);
1613                 }
1614         }
1615         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1616         status = 0;
1617 bail:
1618         if (rename_lock)
1619                 ocfs2_rename_unlock(osb);
1620
1621         if (handle)
1622                 ocfs2_commit_trans(osb, handle);
1623
1624         if (parents_locked)
1625                 ocfs2_double_unlock(old_dir, new_dir);
1626
1627         if (old_child_locked)
1628                 ocfs2_inode_unlock(old_inode, 1);
1629
1630         if (new_child_locked)
1631                 ocfs2_inode_unlock(new_inode, 1);
1632
1633         if (orphan_dir) {
1634                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1635                 ocfs2_inode_unlock(orphan_dir, 1);
1636                 mutex_unlock(&orphan_dir->i_mutex);
1637                 iput(orphan_dir);
1638         }
1639
1640         if (new_inode)
1641                 sync_mapping_buffers(old_inode->i_mapping);
1642
1643         if (new_inode)
1644                 iput(new_inode);
1645
1646         ocfs2_free_dir_lookup_result(&target_lookup_res);
1647         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1648         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1649         ocfs2_free_dir_lookup_result(&orphan_insert);
1650         ocfs2_free_dir_lookup_result(&target_insert);
1651
1652         brelse(newfe_bh);
1653         brelse(old_inode_bh);
1654         brelse(old_dir_bh);
1655         brelse(new_dir_bh);
1656
1657         if (status)
1658                 mlog_errno(status);
1659
1660         return status;
1661 }
1662
1663 /*
1664  * we expect i_size = strlen(symname). Copy symname into the file
1665  * data, including the null terminator.
1666  */
1667 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1668                                      handle_t *handle,
1669                                      struct inode *inode,
1670                                      const char *symname)
1671 {
1672         struct buffer_head **bhs = NULL;
1673         const char *c;
1674         struct super_block *sb = osb->sb;
1675         u64 p_blkno, p_blocks;
1676         int virtual, blocks, status, i, bytes_left;
1677
1678         bytes_left = i_size_read(inode) + 1;
1679         /* we can't trust i_blocks because we're actually going to
1680          * write i_size + 1 bytes. */
1681         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1682
1683         trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1684                                         i_size_read(inode), blocks);
1685
1686         /* Sanity check -- make sure we're going to fit. */
1687         if (bytes_left >
1688             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1689                 status = -EIO;
1690                 mlog_errno(status);
1691                 goto bail;
1692         }
1693
1694         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1695         if (!bhs) {
1696                 status = -ENOMEM;
1697                 mlog_errno(status);
1698                 goto bail;
1699         }
1700
1701         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1702                                              NULL);
1703         if (status < 0) {
1704                 mlog_errno(status);
1705                 goto bail;
1706         }
1707
1708         /* links can never be larger than one cluster so we know this
1709          * is all going to be contiguous, but do a sanity check
1710          * anyway. */
1711         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1712                 status = -EIO;
1713                 mlog_errno(status);
1714                 goto bail;
1715         }
1716
1717         virtual = 0;
1718         while(bytes_left > 0) {
1719                 c = &symname[virtual * sb->s_blocksize];
1720
1721                 bhs[virtual] = sb_getblk(sb, p_blkno);
1722                 if (!bhs[virtual]) {
1723                         status = -ENOMEM;
1724                         mlog_errno(status);
1725                         goto bail;
1726                 }
1727                 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1728                                               bhs[virtual]);
1729
1730                 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1731                                               bhs[virtual],
1732                                               OCFS2_JOURNAL_ACCESS_CREATE);
1733                 if (status < 0) {
1734                         mlog_errno(status);
1735                         goto bail;
1736                 }
1737
1738                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1739
1740                 memcpy(bhs[virtual]->b_data, c,
1741                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1742                        bytes_left);
1743
1744                 ocfs2_journal_dirty(handle, bhs[virtual]);
1745
1746                 virtual++;
1747                 p_blkno++;
1748                 bytes_left -= sb->s_blocksize;
1749         }
1750
1751         status = 0;
1752 bail:
1753
1754         if (bhs) {
1755                 for(i = 0; i < blocks; i++)
1756                         brelse(bhs[i]);
1757                 kfree(bhs);
1758         }
1759
1760         if (status)
1761                 mlog_errno(status);
1762         return status;
1763 }
1764
1765 static int ocfs2_symlink(struct inode *dir,
1766                          struct dentry *dentry,
1767                          const char *symname)
1768 {
1769         int status, l, credits;
1770         u64 newsize;
1771         struct ocfs2_super *osb = NULL;
1772         struct inode *inode = NULL;
1773         struct super_block *sb;
1774         struct buffer_head *new_fe_bh = NULL;
1775         struct buffer_head *parent_fe_bh = NULL;
1776         struct ocfs2_dinode *fe = NULL;
1777         struct ocfs2_dinode *dirfe;
1778         handle_t *handle = NULL;
1779         struct ocfs2_alloc_context *inode_ac = NULL;
1780         struct ocfs2_alloc_context *data_ac = NULL;
1781         struct ocfs2_alloc_context *xattr_ac = NULL;
1782         int want_clusters = 0;
1783         int xattr_credits = 0;
1784         struct ocfs2_security_xattr_info si = {
1785                 .enable = 1,
1786         };
1787         int did_quota = 0, did_quota_inode = 0;
1788         struct ocfs2_dir_lookup_result lookup = { NULL, };
1789         sigset_t oldset;
1790         int did_block_signals = 0;
1791         struct ocfs2_dentry_lock *dl = NULL;
1792
1793         trace_ocfs2_symlink_begin(dir, dentry, symname,
1794                                   dentry->d_name.len, dentry->d_name.name);
1795
1796         dquot_initialize(dir);
1797
1798         sb = dir->i_sb;
1799         osb = OCFS2_SB(sb);
1800
1801         l = strlen(symname) + 1;
1802
1803         credits = ocfs2_calc_symlink_credits(sb);
1804
1805         /* lock the parent directory */
1806         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1807         if (status < 0) {
1808                 if (status != -ENOENT)
1809                         mlog_errno(status);
1810                 return status;
1811         }
1812
1813         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1814         if (!ocfs2_read_links_count(dirfe)) {
1815                 /* can't make a file in a deleted directory. */
1816                 status = -ENOENT;
1817                 goto bail;
1818         }
1819
1820         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1821                                            dentry->d_name.len);
1822         if (status)
1823                 goto bail;
1824
1825         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1826                                               dentry->d_name.name,
1827                                               dentry->d_name.len, &lookup);
1828         if (status < 0) {
1829                 mlog_errno(status);
1830                 goto bail;
1831         }
1832
1833         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1834         if (status < 0) {
1835                 if (status != -ENOSPC)
1836                         mlog_errno(status);
1837                 goto bail;
1838         }
1839
1840         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1841         if (!inode) {
1842                 status = -ENOMEM;
1843                 mlog_errno(status);
1844                 goto bail;
1845         }
1846
1847         /* get security xattr */
1848         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1849         if (status) {
1850                 if (status == -EOPNOTSUPP)
1851                         si.enable = 0;
1852                 else {
1853                         mlog_errno(status);
1854                         goto bail;
1855                 }
1856         }
1857
1858         /* calculate meta data/clusters for setting security xattr */
1859         if (si.enable) {
1860                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1861                                                   &xattr_credits, &xattr_ac);
1862                 if (status < 0) {
1863                         mlog_errno(status);
1864                         goto bail;
1865                 }
1866         }
1867
1868         /* don't reserve bitmap space for fast symlinks. */
1869         if (l > ocfs2_fast_symlink_chars(sb))
1870                 want_clusters += 1;
1871
1872         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1873         if (status < 0) {
1874                 if (status != -ENOSPC)
1875                         mlog_errno(status);
1876                 goto bail;
1877         }
1878
1879         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1880         if (IS_ERR(handle)) {
1881                 status = PTR_ERR(handle);
1882                 handle = NULL;
1883                 mlog_errno(status);
1884                 goto bail;
1885         }
1886
1887         /* Starting to change things, restart is no longer possible. */
1888         ocfs2_block_signals(&oldset);
1889         did_block_signals = 1;
1890
1891         status = dquot_alloc_inode(inode);
1892         if (status)
1893                 goto bail;
1894         did_quota_inode = 1;
1895
1896         trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1897                                    dentry->d_name.name,
1898                                    (unsigned long long)OCFS2_I(dir)->ip_blkno,
1899                                    inode->i_mode);
1900
1901         status = ocfs2_mknod_locked(osb, dir, inode,
1902                                     0, &new_fe_bh, parent_fe_bh, handle,
1903                                     inode_ac);
1904         if (status < 0) {
1905                 mlog_errno(status);
1906                 goto bail;
1907         }
1908
1909         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1910         inode->i_rdev = 0;
1911         newsize = l - 1;
1912         inode->i_op = &ocfs2_symlink_inode_operations;
1913         if (l > ocfs2_fast_symlink_chars(sb)) {
1914                 u32 offset = 0;
1915
1916                 status = dquot_alloc_space_nodirty(inode,
1917                     ocfs2_clusters_to_bytes(osb->sb, 1));
1918                 if (status)
1919                         goto bail;
1920                 did_quota = 1;
1921                 inode->i_mapping->a_ops = &ocfs2_aops;
1922                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1923                                               new_fe_bh,
1924                                               handle, data_ac, NULL,
1925                                               NULL);
1926                 if (status < 0) {
1927                         if (status != -ENOSPC && status != -EINTR) {
1928                                 mlog(ML_ERROR,
1929                                      "Failed to extend file to %llu\n",
1930                                      (unsigned long long)newsize);
1931                                 mlog_errno(status);
1932                                 status = -ENOSPC;
1933                         }
1934                         goto bail;
1935                 }
1936                 i_size_write(inode, newsize);
1937                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1938         } else {
1939                 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1940                 memcpy((char *) fe->id2.i_symlink, symname, l);
1941                 i_size_write(inode, newsize);
1942                 inode->i_blocks = 0;
1943         }
1944
1945         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1946         if (status < 0) {
1947                 mlog_errno(status);
1948                 goto bail;
1949         }
1950
1951         if (!ocfs2_inode_is_fast_symlink(inode)) {
1952                 status = ocfs2_create_symlink_data(osb, handle, inode,
1953                                                    symname);
1954                 if (status < 0) {
1955                         mlog_errno(status);
1956                         goto bail;
1957                 }
1958         }
1959
1960         if (si.enable) {
1961                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1962                                                  xattr_ac, data_ac);
1963                 if (status < 0) {
1964                         mlog_errno(status);
1965                         goto bail;
1966                 }
1967         }
1968
1969         /*
1970          * Do this before adding the entry to the directory. We add
1971          * also set d_op after success so that ->d_iput() will cleanup
1972          * the dentry lock even if ocfs2_add_entry() fails below.
1973          */
1974         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1975         if (status) {
1976                 mlog_errno(status);
1977                 goto bail;
1978         }
1979
1980         dl = dentry->d_fsdata;
1981
1982         status = ocfs2_add_entry(handle, dentry, inode,
1983                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
1984                                  &lookup);
1985         if (status < 0) {
1986                 mlog_errno(status);
1987                 goto bail;
1988         }
1989
1990         insert_inode_hash(inode);
1991         d_instantiate(dentry, inode);
1992 bail:
1993         if (status < 0 && did_quota)
1994                 dquot_free_space_nodirty(inode,
1995                                         ocfs2_clusters_to_bytes(osb->sb, 1));
1996         if (status < 0 && did_quota_inode)
1997                 dquot_free_inode(inode);
1998         if (handle)
1999                 ocfs2_commit_trans(osb, handle);
2000
2001         ocfs2_inode_unlock(dir, 1);
2002         if (did_block_signals)
2003                 ocfs2_unblock_signals(&oldset);
2004
2005         brelse(new_fe_bh);
2006         brelse(parent_fe_bh);
2007         kfree(si.value);
2008         ocfs2_free_dir_lookup_result(&lookup);
2009         if (inode_ac)
2010                 ocfs2_free_alloc_context(inode_ac);
2011         if (data_ac)
2012                 ocfs2_free_alloc_context(data_ac);
2013         if (xattr_ac)
2014                 ocfs2_free_alloc_context(xattr_ac);
2015         if ((status < 0) && inode) {
2016                 if (dl)
2017                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2018
2019                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2020                 clear_nlink(inode);
2021                 iput(inode);
2022         }
2023
2024         if (status)
2025                 mlog_errno(status);
2026
2027         return status;
2028 }
2029
2030 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2031 {
2032         int status, namelen;
2033
2034         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2035                            (long long)blkno);
2036         if (namelen <= 0) {
2037                 if (namelen)
2038                         status = namelen;
2039                 else
2040                         status = -EINVAL;
2041                 mlog_errno(status);
2042                 goto bail;
2043         }
2044         if (namelen != OCFS2_ORPHAN_NAMELEN) {
2045                 status = -EINVAL;
2046                 mlog_errno(status);
2047                 goto bail;
2048         }
2049
2050         trace_ocfs2_blkno_stringify(blkno, name, namelen);
2051
2052         status = 0;
2053 bail:
2054         if (status < 0)
2055                 mlog_errno(status);
2056         return status;
2057 }
2058
2059 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2060                                         struct inode **ret_orphan_dir,
2061                                         struct buffer_head **ret_orphan_dir_bh)
2062 {
2063         struct inode *orphan_dir_inode;
2064         struct buffer_head *orphan_dir_bh = NULL;
2065         int ret = 0;
2066
2067         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2068                                                        ORPHAN_DIR_SYSTEM_INODE,
2069                                                        osb->slot_num);
2070         if (!orphan_dir_inode) {
2071                 ret = -ENOENT;
2072                 mlog_errno(ret);
2073                 return ret;
2074         }
2075
2076         mutex_lock(&orphan_dir_inode->i_mutex);
2077
2078         ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2079         if (ret < 0) {
2080                 mutex_unlock(&orphan_dir_inode->i_mutex);
2081                 iput(orphan_dir_inode);
2082
2083                 mlog_errno(ret);
2084                 return ret;
2085         }
2086
2087         *ret_orphan_dir = orphan_dir_inode;
2088         *ret_orphan_dir_bh = orphan_dir_bh;
2089
2090         return 0;
2091 }
2092
2093 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2094                                       struct buffer_head *orphan_dir_bh,
2095                                       u64 blkno,
2096                                       char *name,
2097                                       struct ocfs2_dir_lookup_result *lookup,
2098                                       bool dio)
2099 {
2100         int ret;
2101         struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2102         int namelen = dio ?
2103                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2104                         OCFS2_ORPHAN_NAMELEN;
2105
2106         if (dio) {
2107                 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2108                                 OCFS2_DIO_ORPHAN_PREFIX);
2109                 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2110                         ret = -EINVAL;
2111                         mlog_errno(ret);
2112                         return ret;
2113                 }
2114
2115                 ret = ocfs2_blkno_stringify(blkno,
2116                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2117         } else
2118                 ret = ocfs2_blkno_stringify(blkno, name);
2119         if (ret < 0) {
2120                 mlog_errno(ret);
2121                 return ret;
2122         }
2123
2124         ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2125                                            orphan_dir_bh, name,
2126                                            namelen, lookup);
2127         if (ret < 0) {
2128                 mlog_errno(ret);
2129                 return ret;
2130         }
2131
2132         return 0;
2133 }
2134
2135 /**
2136  * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2137  * insertion of an orphan.
2138  * @osb: ocfs2 file system
2139  * @ret_orphan_dir: Orphan dir inode - returned locked!
2140  * @blkno: Actual block number of the inode to be inserted into orphan dir.
2141  * @lookup: dir lookup result, to be passed back into functions like
2142  *          ocfs2_orphan_add
2143  *
2144  * Returns zero on success and the ret_orphan_dir, name and lookup
2145  * fields will be populated.
2146  *
2147  * Returns non-zero on failure.
2148  */
2149 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2150                                     struct inode **ret_orphan_dir,
2151                                     u64 blkno,
2152                                     char *name,
2153                                     struct ocfs2_dir_lookup_result *lookup,
2154                                     bool dio)
2155 {
2156         struct inode *orphan_dir_inode = NULL;
2157         struct buffer_head *orphan_dir_bh = NULL;
2158         int ret = 0;
2159
2160         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2161                                            &orphan_dir_bh);
2162         if (ret < 0) {
2163                 mlog_errno(ret);
2164                 return ret;
2165         }
2166
2167         ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2168                                          blkno, name, lookup, dio);
2169         if (ret < 0) {
2170                 mlog_errno(ret);
2171                 goto out;
2172         }
2173
2174         *ret_orphan_dir = orphan_dir_inode;
2175
2176 out:
2177         brelse(orphan_dir_bh);
2178
2179         if (ret) {
2180                 ocfs2_inode_unlock(orphan_dir_inode, 1);
2181                 mutex_unlock(&orphan_dir_inode->i_mutex);
2182                 iput(orphan_dir_inode);
2183         }
2184
2185         if (ret)
2186                 mlog_errno(ret);
2187         return ret;
2188 }
2189
2190 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2191                             handle_t *handle,
2192                             struct inode *inode,
2193                             struct buffer_head *fe_bh,
2194                             char *name,
2195                             struct ocfs2_dir_lookup_result *lookup,
2196                             struct inode *orphan_dir_inode,
2197                             bool dio)
2198 {
2199         struct buffer_head *orphan_dir_bh = NULL;
2200         int status = 0;
2201         struct ocfs2_dinode *orphan_fe;
2202         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2203         int namelen = dio ?
2204                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2205                         OCFS2_ORPHAN_NAMELEN;
2206
2207         trace_ocfs2_orphan_add_begin(
2208                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2209
2210         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2211         if (status < 0) {
2212                 mlog_errno(status);
2213                 goto leave;
2214         }
2215
2216         status = ocfs2_journal_access_di(handle,
2217                                          INODE_CACHE(orphan_dir_inode),
2218                                          orphan_dir_bh,
2219                                          OCFS2_JOURNAL_ACCESS_WRITE);
2220         if (status < 0) {
2221                 mlog_errno(status);
2222                 goto leave;
2223         }
2224
2225         /*
2226          * We're going to journal the change of i_flags and i_orphaned_slot.
2227          * It's safe anyway, though some callers may duplicate the journaling.
2228          * Journaling within the func just make the logic look more
2229          * straightforward.
2230          */
2231         status = ocfs2_journal_access_di(handle,
2232                                          INODE_CACHE(inode),
2233                                          fe_bh,
2234                                          OCFS2_JOURNAL_ACCESS_WRITE);
2235         if (status < 0) {
2236                 mlog_errno(status);
2237                 goto leave;
2238         }
2239
2240         /* we're a cluster, and nlink can change on disk from
2241          * underneath us... */
2242         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2243         if (S_ISDIR(inode->i_mode))
2244                 ocfs2_add_links_count(orphan_fe, 1);
2245         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2246         ocfs2_journal_dirty(handle, orphan_dir_bh);
2247
2248         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2249                                    namelen, inode,
2250                                    OCFS2_I(inode)->ip_blkno,
2251                                    orphan_dir_bh, lookup);
2252         if (status < 0) {
2253                 mlog_errno(status);
2254                 goto rollback;
2255         }
2256
2257         if (dio) {
2258                 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2259                  * slot.
2260                  */
2261                 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2262                 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2263         } else {
2264                 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2265                 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2266
2267                 /* Record which orphan dir our inode now resides
2268                  * in. delete_inode will use this to determine which orphan
2269                  * dir to lock. */
2270                 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2271         }
2272
2273         ocfs2_journal_dirty(handle, fe_bh);
2274
2275         trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2276                                    osb->slot_num);
2277
2278 rollback:
2279         if (status < 0) {
2280                 if (S_ISDIR(inode->i_mode))
2281                         ocfs2_add_links_count(orphan_fe, -1);
2282                 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2283         }
2284
2285 leave:
2286         brelse(orphan_dir_bh);
2287
2288         return status;
2289 }
2290
2291 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2292 int ocfs2_orphan_del(struct ocfs2_super *osb,
2293                      handle_t *handle,
2294                      struct inode *orphan_dir_inode,
2295                      struct inode *inode,
2296                      struct buffer_head *orphan_dir_bh,
2297                      bool dio)
2298 {
2299         const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN;
2300         char name[namelen + 1];
2301         struct ocfs2_dinode *orphan_fe;
2302         int status = 0;
2303         struct ocfs2_dir_lookup_result lookup = { NULL, };
2304
2305         if (dio) {
2306                 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2307                                 OCFS2_DIO_ORPHAN_PREFIX);
2308                 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2309                         status = -EINVAL;
2310                         mlog_errno(status);
2311                         return status;
2312                 }
2313
2314                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2315                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2316         } else
2317                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2318         if (status < 0) {
2319                 mlog_errno(status);
2320                 goto leave;
2321         }
2322
2323         trace_ocfs2_orphan_del(
2324              (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2325              name, strlen(name));
2326
2327         /* find it's spot in the orphan directory */
2328         status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2329                                   &lookup);
2330         if (status) {
2331                 mlog_errno(status);
2332                 goto leave;
2333         }
2334
2335         /* remove it from the orphan directory */
2336         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2337         if (status < 0) {
2338                 mlog_errno(status);
2339                 goto leave;
2340         }
2341
2342         status = ocfs2_journal_access_di(handle,
2343                                          INODE_CACHE(orphan_dir_inode),
2344                                          orphan_dir_bh,
2345                                          OCFS2_JOURNAL_ACCESS_WRITE);
2346         if (status < 0) {
2347                 mlog_errno(status);
2348                 goto leave;
2349         }
2350
2351         /* do the i_nlink dance! :) */
2352         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2353         if (S_ISDIR(inode->i_mode))
2354                 ocfs2_add_links_count(orphan_fe, -1);
2355         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2356         ocfs2_journal_dirty(handle, orphan_dir_bh);
2357
2358 leave:
2359         ocfs2_free_dir_lookup_result(&lookup);
2360
2361         if (status)
2362                 mlog_errno(status);
2363         return status;
2364 }
2365
2366 /**
2367  * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2368  * allocated file. This is different from the typical 'add to orphan dir'
2369  * operation in that the inode does not yet exist. This is a problem because
2370  * the orphan dir stringifies the inode block number to come up with it's
2371  * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2372  * problem. This function works around it by calling deeper into the orphan
2373  * and suballoc code than other callers. Use this only by necessity.
2374  * @dir: The directory which this inode will ultimately wind up under - not the
2375  * orphan dir!
2376  * @dir_bh: buffer_head the @dir inode block
2377  * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2378  * with the string to be used for orphan dirent. Pass back to the orphan dir
2379  * code.
2380  * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2381  * dir code.
2382  * @ret_di_blkno: block number where the new inode will be allocated.
2383  * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2384  * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2385  *
2386  * Returns zero on success and the ret_orphan_dir, name and lookup
2387  * fields will be populated.
2388  *
2389  * Returns non-zero on failure.
2390  */
2391 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2392                                         struct buffer_head *dir_bh,
2393                                         char *orphan_name,
2394                                         struct inode **ret_orphan_dir,
2395                                         u64 *ret_di_blkno,
2396                                         struct ocfs2_dir_lookup_result *orphan_insert,
2397                                         struct ocfs2_alloc_context **ret_inode_ac)
2398 {
2399         int ret;
2400         u64 di_blkno;
2401         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2402         struct inode *orphan_dir = NULL;
2403         struct buffer_head *orphan_dir_bh = NULL;
2404         struct ocfs2_alloc_context *inode_ac = NULL;
2405
2406         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2407         if (ret < 0) {
2408                 mlog_errno(ret);
2409                 return ret;
2410         }
2411
2412         /* reserve an inode spot */
2413         ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2414         if (ret < 0) {
2415                 if (ret != -ENOSPC)
2416                         mlog_errno(ret);
2417                 goto out;
2418         }
2419
2420         ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2421                                        &di_blkno);
2422         if (ret) {
2423                 mlog_errno(ret);
2424                 goto out;
2425         }
2426
2427         ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2428                                          di_blkno, orphan_name, orphan_insert,
2429                                          false);
2430         if (ret < 0) {
2431                 mlog_errno(ret);
2432                 goto out;
2433         }
2434
2435 out:
2436         if (ret == 0) {
2437                 *ret_orphan_dir = orphan_dir;
2438                 *ret_di_blkno = di_blkno;
2439                 *ret_inode_ac = inode_ac;
2440                 /*
2441                  * orphan_name and orphan_insert are already up to
2442                  * date via prepare_orphan_dir
2443                  */
2444         } else {
2445                 /* Unroll reserve_new_inode* */
2446                 if (inode_ac)
2447                         ocfs2_free_alloc_context(inode_ac);
2448
2449                 /* Unroll orphan dir locking */
2450                 mutex_unlock(&orphan_dir->i_mutex);
2451                 ocfs2_inode_unlock(orphan_dir, 1);
2452                 iput(orphan_dir);
2453         }
2454
2455         brelse(orphan_dir_bh);
2456
2457         return ret;
2458 }
2459
2460 int ocfs2_create_inode_in_orphan(struct inode *dir,
2461                                  int mode,
2462                                  struct inode **new_inode)
2463 {
2464         int status, did_quota_inode = 0;
2465         struct inode *inode = NULL;
2466         struct inode *orphan_dir = NULL;
2467         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2468         struct ocfs2_dinode *di = NULL;
2469         handle_t *handle = NULL;
2470         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2471         struct buffer_head *parent_di_bh = NULL;
2472         struct buffer_head *new_di_bh = NULL;
2473         struct ocfs2_alloc_context *inode_ac = NULL;
2474         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2475         u64 uninitialized_var(di_blkno), suballoc_loc;
2476         u16 suballoc_bit;
2477
2478         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2479         if (status < 0) {
2480                 if (status != -ENOENT)
2481                         mlog_errno(status);
2482                 return status;
2483         }
2484
2485         status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2486                                               orphan_name, &orphan_dir,
2487                                               &di_blkno, &orphan_insert, &inode_ac);
2488         if (status < 0) {
2489                 if (status != -ENOSPC)
2490                         mlog_errno(status);
2491                 goto leave;
2492         }
2493
2494         inode = ocfs2_get_init_inode(dir, mode);
2495         if (!inode) {
2496                 status = -ENOMEM;
2497                 mlog_errno(status);
2498                 goto leave;
2499         }
2500
2501         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2502         if (IS_ERR(handle)) {
2503                 status = PTR_ERR(handle);
2504                 handle = NULL;
2505                 mlog_errno(status);
2506                 goto leave;
2507         }
2508
2509         status = dquot_alloc_inode(inode);
2510         if (status)
2511                 goto leave;
2512         did_quota_inode = 1;
2513
2514         status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2515                                               &suballoc_loc,
2516                                               &suballoc_bit, di_blkno);
2517         if (status < 0) {
2518                 mlog_errno(status);
2519                 goto leave;
2520         }
2521
2522         clear_nlink(inode);
2523         /* do the real work now. */
2524         status = __ocfs2_mknod_locked(dir, inode,
2525                                       0, &new_di_bh, parent_di_bh, handle,
2526                                       inode_ac, di_blkno, suballoc_loc,
2527                                       suballoc_bit);
2528         if (status < 0) {
2529                 mlog_errno(status);
2530                 goto leave;
2531         }
2532
2533         di = (struct ocfs2_dinode *)new_di_bh->b_data;
2534         status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2535                                   &orphan_insert, orphan_dir, false);
2536         if (status < 0) {
2537                 mlog_errno(status);
2538                 goto leave;
2539         }
2540
2541         /* get open lock so that only nodes can't remove it from orphan dir. */
2542         status = ocfs2_open_lock(inode);
2543         if (status < 0)
2544                 mlog_errno(status);
2545
2546         insert_inode_hash(inode);
2547 leave:
2548         if (status < 0 && did_quota_inode)
2549                 dquot_free_inode(inode);
2550         if (handle)
2551                 ocfs2_commit_trans(osb, handle);
2552
2553         if (orphan_dir) {
2554                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2555                 ocfs2_inode_unlock(orphan_dir, 1);
2556                 mutex_unlock(&orphan_dir->i_mutex);
2557                 iput(orphan_dir);
2558         }
2559
2560         if ((status < 0) && inode) {
2561                 clear_nlink(inode);
2562                 iput(inode);
2563         }
2564
2565         if (inode_ac)
2566                 ocfs2_free_alloc_context(inode_ac);
2567
2568         brelse(new_di_bh);
2569
2570         if (!status)
2571                 *new_inode = inode;
2572
2573         ocfs2_free_dir_lookup_result(&orphan_insert);
2574
2575         ocfs2_inode_unlock(dir, 1);
2576         brelse(parent_di_bh);
2577         return status;
2578 }
2579
2580 static int ocfs2_dio_orphan_recovered(struct inode *inode)
2581 {
2582         int ret;
2583         struct buffer_head *di_bh = NULL;
2584         struct ocfs2_dinode *di = NULL;
2585
2586         ret = ocfs2_inode_lock(inode, &di_bh, 1);
2587         if (ret < 0) {
2588                 mlog_errno(ret);
2589                 return 0;
2590         }
2591
2592         di = (struct ocfs2_dinode *) di_bh->b_data;
2593         ret = !(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL));
2594         ocfs2_inode_unlock(inode, 1);
2595         brelse(di_bh);
2596
2597         return ret;
2598 }
2599
2600 #define OCFS2_DIO_ORPHANED_FL_CHECK_INTERVAL 10000
2601 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2602         struct inode *inode)
2603 {
2604         char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2605         struct inode *orphan_dir_inode = NULL;
2606         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2607         struct buffer_head *di_bh = NULL;
2608         int status = 0;
2609         handle_t *handle = NULL;
2610         struct ocfs2_dinode *di = NULL;
2611
2612 restart:
2613         status = ocfs2_inode_lock(inode, &di_bh, 1);
2614         if (status < 0) {
2615                 mlog_errno(status);
2616                 goto bail;
2617         }
2618
2619         di = (struct ocfs2_dinode *) di_bh->b_data;
2620         /*
2621          * Another append dio crashed?
2622          * If so, wait for recovery first.
2623          */
2624         if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2625                 ocfs2_inode_unlock(inode, 1);
2626                 brelse(di_bh);
2627                 wait_event_interruptible_timeout(OCFS2_I(inode)->append_dio_wq,
2628                                 ocfs2_dio_orphan_recovered(inode),
2629                                 msecs_to_jiffies(OCFS2_DIO_ORPHANED_FL_CHECK_INTERVAL));
2630                 goto restart;
2631         }
2632
2633         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2634                         OCFS2_I(inode)->ip_blkno,
2635                         orphan_name,
2636                         &orphan_insert,
2637                         true);
2638         if (status < 0) {
2639                 mlog_errno(status);
2640                 goto bail_unlock_inode;
2641         }
2642
2643         handle = ocfs2_start_trans(osb,
2644                         OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2645         if (IS_ERR(handle)) {
2646                 status = PTR_ERR(handle);
2647                 goto bail_unlock_orphan;
2648         }
2649
2650         status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2651                         &orphan_insert, orphan_dir_inode, true);
2652         if (status)
2653                 mlog_errno(status);
2654
2655         ocfs2_commit_trans(osb, handle);
2656
2657 bail_unlock_orphan:
2658         ocfs2_inode_unlock(orphan_dir_inode, 1);
2659         mutex_unlock(&orphan_dir_inode->i_mutex);
2660         iput(orphan_dir_inode);
2661
2662         ocfs2_free_dir_lookup_result(&orphan_insert);
2663
2664 bail_unlock_inode:
2665         ocfs2_inode_unlock(inode, 1);
2666         brelse(di_bh);
2667
2668 bail:
2669         return status;
2670 }
2671
2672 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2673                 struct inode *inode, int update_isize,
2674                 loff_t end)
2675 {
2676         struct inode *orphan_dir_inode = NULL;
2677         struct buffer_head *orphan_dir_bh = NULL;
2678         struct buffer_head *di_bh = NULL;
2679         struct ocfs2_dinode *di = NULL;
2680         handle_t *handle = NULL;
2681         int status = 0;
2682
2683         status = ocfs2_inode_lock(inode, &di_bh, 1);
2684         if (status < 0) {
2685                 mlog_errno(status);
2686                 goto bail;
2687         }
2688         di = (struct ocfs2_dinode *) di_bh->b_data;
2689
2690         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2691                         ORPHAN_DIR_SYSTEM_INODE,
2692                         le16_to_cpu(di->i_dio_orphaned_slot));
2693         if (!orphan_dir_inode) {
2694                 status = -ENOENT;
2695                 mlog_errno(status);
2696                 goto bail_unlock_inode;
2697         }
2698
2699         mutex_lock(&orphan_dir_inode->i_mutex);
2700         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2701         if (status < 0) {
2702                 mutex_unlock(&orphan_dir_inode->i_mutex);
2703                 iput(orphan_dir_inode);
2704                 mlog_errno(status);
2705                 goto bail_unlock_inode;
2706         }
2707
2708         handle = ocfs2_start_trans(osb,
2709                         OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2710         if (IS_ERR(handle)) {
2711                 status = PTR_ERR(handle);
2712                 goto bail_unlock_orphan;
2713         }
2714
2715         BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2716
2717         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2718                                 inode, orphan_dir_bh, true);
2719         if (status < 0) {
2720                 mlog_errno(status);
2721                 goto bail_commit;
2722         }
2723
2724         status = ocfs2_journal_access_di(handle,
2725                         INODE_CACHE(inode),
2726                         di_bh,
2727                         OCFS2_JOURNAL_ACCESS_WRITE);
2728         if (status < 0) {
2729                 mlog_errno(status);
2730                 goto bail_commit;
2731         }
2732
2733         di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2734         di->i_dio_orphaned_slot = 0;
2735
2736         if (update_isize) {
2737                 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2738                 if (status)
2739                         mlog_errno(status);
2740         } else
2741                 ocfs2_journal_dirty(handle, di_bh);
2742
2743 bail_commit:
2744         ocfs2_commit_trans(osb, handle);
2745
2746 bail_unlock_orphan:
2747         ocfs2_inode_unlock(orphan_dir_inode, 1);
2748         mutex_unlock(&orphan_dir_inode->i_mutex);
2749         brelse(orphan_dir_bh);
2750         iput(orphan_dir_inode);
2751
2752 bail_unlock_inode:
2753         ocfs2_inode_unlock(inode, 1);
2754         brelse(di_bh);
2755
2756 bail:
2757         return status;
2758 }
2759
2760 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2761                                    struct inode *inode,
2762                                    struct dentry *dentry)
2763 {
2764         int status = 0;
2765         struct buffer_head *parent_di_bh = NULL;
2766         handle_t *handle = NULL;
2767         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2768         struct ocfs2_dinode *dir_di, *di;
2769         struct inode *orphan_dir_inode = NULL;
2770         struct buffer_head *orphan_dir_bh = NULL;
2771         struct buffer_head *di_bh = NULL;
2772         struct ocfs2_dir_lookup_result lookup = { NULL, };
2773
2774         trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2775                                 dentry->d_name.len, dentry->d_name.name,
2776                                 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2777                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2778
2779         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2780         if (status < 0) {
2781                 if (status != -ENOENT)
2782                         mlog_errno(status);
2783                 return status;
2784         }
2785
2786         dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2787         if (!dir_di->i_links_count) {
2788                 /* can't make a file in a deleted directory. */
2789                 status = -ENOENT;
2790                 goto leave;
2791         }
2792
2793         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2794                                            dentry->d_name.len);
2795         if (status)
2796                 goto leave;
2797
2798         /* get a spot inside the dir. */
2799         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2800                                               dentry->d_name.name,
2801                                               dentry->d_name.len, &lookup);
2802         if (status < 0) {
2803                 mlog_errno(status);
2804                 goto leave;
2805         }
2806
2807         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2808                                                        ORPHAN_DIR_SYSTEM_INODE,
2809                                                        osb->slot_num);
2810         if (!orphan_dir_inode) {
2811                 status = -ENOENT;
2812                 mlog_errno(status);
2813                 goto leave;
2814         }
2815
2816         mutex_lock(&orphan_dir_inode->i_mutex);
2817
2818         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2819         if (status < 0) {
2820                 mlog_errno(status);
2821                 mutex_unlock(&orphan_dir_inode->i_mutex);
2822                 iput(orphan_dir_inode);
2823                 goto leave;
2824         }
2825
2826         status = ocfs2_read_inode_block(inode, &di_bh);
2827         if (status < 0) {
2828                 mlog_errno(status);
2829                 goto orphan_unlock;
2830         }
2831
2832         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2833         if (IS_ERR(handle)) {
2834                 status = PTR_ERR(handle);
2835                 handle = NULL;
2836                 mlog_errno(status);
2837                 goto orphan_unlock;
2838         }
2839
2840         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2841                                          di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2842         if (status < 0) {
2843                 mlog_errno(status);
2844                 goto out_commit;
2845         }
2846
2847         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2848                                   orphan_dir_bh, false);
2849         if (status < 0) {
2850                 mlog_errno(status);
2851                 goto out_commit;
2852         }
2853
2854         di = (struct ocfs2_dinode *)di_bh->b_data;
2855         di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2856         di->i_orphaned_slot = 0;
2857         set_nlink(inode, 1);
2858         ocfs2_set_links_count(di, inode->i_nlink);
2859         ocfs2_update_inode_fsync_trans(handle, inode, 1);
2860         ocfs2_journal_dirty(handle, di_bh);
2861
2862         status = ocfs2_add_entry(handle, dentry, inode,
2863                                  OCFS2_I(inode)->ip_blkno, parent_di_bh,
2864                                  &lookup);
2865         if (status < 0) {
2866                 mlog_errno(status);
2867                 goto out_commit;
2868         }
2869
2870         status = ocfs2_dentry_attach_lock(dentry, inode,
2871                                           OCFS2_I(dir)->ip_blkno);
2872         if (status) {
2873                 mlog_errno(status);
2874                 goto out_commit;
2875         }
2876
2877         d_instantiate(dentry, inode);
2878         status = 0;
2879 out_commit:
2880         ocfs2_commit_trans(osb, handle);
2881 orphan_unlock:
2882         ocfs2_inode_unlock(orphan_dir_inode, 1);
2883         mutex_unlock(&orphan_dir_inode->i_mutex);
2884         iput(orphan_dir_inode);
2885 leave:
2886
2887         ocfs2_inode_unlock(dir, 1);
2888
2889         brelse(di_bh);
2890         brelse(parent_di_bh);
2891         brelse(orphan_dir_bh);
2892
2893         ocfs2_free_dir_lookup_result(&lookup);
2894
2895         if (status)
2896                 mlog_errno(status);
2897
2898         return status;
2899 }
2900
2901 const struct inode_operations ocfs2_dir_iops = {
2902         .create         = ocfs2_create,
2903         .lookup         = ocfs2_lookup,
2904         .link           = ocfs2_link,
2905         .unlink         = ocfs2_unlink,
2906         .rmdir          = ocfs2_unlink,
2907         .symlink        = ocfs2_symlink,
2908         .mkdir          = ocfs2_mkdir,
2909         .mknod          = ocfs2_mknod,
2910         .rename         = ocfs2_rename,
2911         .setattr        = ocfs2_setattr,
2912         .getattr        = ocfs2_getattr,
2913         .permission     = ocfs2_permission,
2914         .setxattr       = generic_setxattr,
2915         .getxattr       = generic_getxattr,
2916         .listxattr      = ocfs2_listxattr,
2917         .removexattr    = generic_removexattr,
2918         .fiemap         = ocfs2_fiemap,
2919         .get_acl        = ocfs2_iop_get_acl,
2920         .set_acl        = ocfs2_iop_set_acl,
2921 };