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 #include <linux/iversion.h>
  45
  46 #include <cluster/masklog.h>
  47
  48 #include "ocfs2.h"
  49
  50 #include "alloc.h"
  51 #include "dcache.h"
  52 #include "dir.h"
  53 #include "dlmglue.h"
  54 #include "extent_map.h"
  55 #include "file.h"
  56 #include "inode.h"
  57 #include "journal.h"
  58 #include "namei.h"
  59 #include "suballoc.h"
  60 #include "super.h"
  61 #include "symlink.h"
  62 #include "sysfile.h"
  63 #include "uptodate.h"
  64 #include "xattr.h"
  65 #include "acl.h"
  66 #include "ocfs2_trace.h"
  67
  68 #include "buffer_head_io.h"
  69
  70 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
  71                               struct inode *dir,
  72                               struct inode *inode,
  73                               dev_t dev,
  74                               struct buffer_head **new_fe_bh,
  75                               struct buffer_head *parent_fe_bh,
  76                               handle_t *handle,
  77                               struct ocfs2_alloc_context *inode_ac);
  78
  79 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
  80                                     struct inode **ret_orphan_dir,
  81                                     u64 blkno,
  82                                     char *name,
  83                                     struct ocfs2_dir_lookup_result *lookup,
  84                                     bool dio);
  85
  86 static int ocfs2_orphan_add(struct ocfs2_super *osb,
  87                             handle_t *handle,
  88                             struct inode *inode,
  89                             struct buffer_head *fe_bh,
  90                             char *name,
  91                             struct ocfs2_dir_lookup_result *lookup,
  92                             struct inode *orphan_dir_inode,
  93                             bool dio);
  94
  95 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
  96                                      handle_t *handle,
  97                                      struct inode *inode,
  98                                      const char *symname);
  99
 100 static int ocfs2_double_lock(struct ocfs2_super *osb,
 101                              struct buffer_head **bh1,
 102                              struct inode *inode1,
 103                              struct buffer_head **bh2,
 104                              struct inode *inode2,
 105                              int rename);
 106
 107 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
 108 /* An orphan dir name is an 8 byte value, printed as a hex string */
 109 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
 110
 111 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
 112                                    unsigned int flags)
 113 {
 114         int status;
 115         u64 blkno;
 116         struct inode *inode = NULL;
 117         struct dentry *ret;
 118         struct ocfs2_inode_info *oi;
 119
 120         trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
 121                            dentry->d_name.name,
 122                            (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
 123
 124         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
 125                 ret = ERR_PTR(-ENAMETOOLONG);
 126                 goto bail;
 127         }
 128
 129         status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
 130         if (status < 0) {
 131                 if (status != -ENOENT)
 132                         mlog_errno(status);
 133                 ret = ERR_PTR(status);
 134                 goto bail;
 135         }
 136
 137         status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
 138                                             dentry->d_name.len, &blkno);
 139         if (status < 0)
 140                 goto bail_add;
 141
 142         inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
 143         if (IS_ERR(inode)) {
 144                 ret = ERR_PTR(-EACCES);
 145                 goto bail_unlock;
 146         }
 147
 148         oi = OCFS2_I(inode);
 149         /* Clear any orphaned state... If we were able to look up the
 150          * inode from a directory, it certainly can't be orphaned. We
 151          * might have the bad state from a node which intended to
 152          * orphan this inode but crashed before it could commit the
 153          * unlink. */
 154         spin_lock(&oi->ip_lock);
 155         oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
 156         spin_unlock(&oi->ip_lock);
 157
 158 bail_add:
 159         ret = d_splice_alias(inode, dentry);
 160
 161         if (inode) {
 162                 /*
 163                  * If d_splice_alias() finds a DCACHE_DISCONNECTED
 164                  * dentry, it will d_move() it on top of ourse. The
 165                  * return value will indicate this however, so in
 166                  * those cases, we switch them around for the locking
 167                  * code.
 168                  *
 169                  * NOTE: This dentry already has ->d_op set from
 170                  * ocfs2_get_parent() and ocfs2_get_dentry()
 171                  */
 172                 if (!IS_ERR_OR_NULL(ret))
 173                         dentry = ret;
 174
 175                 status = ocfs2_dentry_attach_lock(dentry, inode,
 176                                                   OCFS2_I(dir)->ip_blkno);
 177                 if (status) {
 178                         mlog_errno(status);
 179                         ret = ERR_PTR(status);
 180                         goto bail_unlock;
 181                 }
 182         } else
 183                 ocfs2_dentry_attach_gen(dentry);
 184
 185 bail_unlock:
 186         /* Don't drop the cluster lock until *after* the d_add --
 187          * unlink on another node will message us to remove that
 188          * dentry under this lock so otherwise we can race this with
 189          * the downconvert thread and have a stale dentry. */
 190         ocfs2_inode_unlock(dir, 0);
 191
 192 bail:
 193
 194         trace_ocfs2_lookup_ret(ret);
 195
 196         return ret;
 197 }
 198
 199 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
 200 {
 201         struct inode *inode;
 202         int status;
 203
 204         inode = new_inode(dir->i_sb);
 205         if (!inode) {
 206                 mlog(ML_ERROR, "new_inode failed!\n");
 207                 return ERR_PTR(-ENOMEM);
 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         status = dquot_initialize(inode);
 217         if (status)
 218                 return ERR_PTR(status);
 219
 220         return inode;
 221 }
 222
 223 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
 224                 struct dentry *dentry, struct inode *inode)
 225 {
 226         struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
 227
 228         ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
 229         ocfs2_lock_res_free(&dl->dl_lockres);
 230         BUG_ON(dl->dl_count != 1);
 231         spin_lock(&dentry_attach_lock);
 232         dentry->d_fsdata = NULL;
 233         spin_unlock(&dentry_attach_lock);
 234         kfree(dl);
 235         iput(inode);
 236 }
 237
 238 static int ocfs2_mknod(struct inode *dir,
 239                        struct dentry *dentry,
 240                        umode_t mode,
 241                        dev_t dev)
 242 {
 243         int status = 0;
 244         struct buffer_head *parent_fe_bh = NULL;
 245         handle_t *handle = NULL;
 246         struct ocfs2_super *osb;
 247         struct ocfs2_dinode *dirfe;
 248         struct buffer_head *new_fe_bh = NULL;
 249         struct inode *inode = NULL;
 250         struct ocfs2_alloc_context *inode_ac = NULL;
 251         struct ocfs2_alloc_context *data_ac = NULL;
 252         struct ocfs2_alloc_context *meta_ac = NULL;
 253         int want_clusters = 0;
 254         int want_meta = 0;
 255         int xattr_credits = 0;
 256         struct ocfs2_security_xattr_info si = {
 257                 .enable = 1,
 258         };
 259         int did_quota_inode = 0;
 260         struct ocfs2_dir_lookup_result lookup = { NULL, };
 261         sigset_t oldset;
 262         int did_block_signals = 0;
 263         struct ocfs2_dentry_lock *dl = NULL;
 264
 265         trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 266                           (unsigned long long)OCFS2_I(dir)->ip_blkno,
 267                           (unsigned long)dev, mode);
 268
 269         status = dquot_initialize(dir);
 270         if (status) {
 271                 mlog_errno(status);
 272                 return status;
 273         }
 274
 275         /* get our super block */
 276         osb = OCFS2_SB(dir->i_sb);
 277
 278         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
 279         if (status < 0) {
 280                 if (status != -ENOENT)
 281                         mlog_errno(status);
 282                 return status;
 283         }
 284
 285         if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
 286                 status = -EMLINK;
 287                 goto leave;
 288         }
 289
 290         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
 291         if (!ocfs2_read_links_count(dirfe)) {
 292                 /* can't make a file in a deleted directory. */
 293                 status = -ENOENT;
 294                 goto leave;
 295         }
 296
 297         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 298                                            dentry->d_name.len);
 299         if (status)
 300                 goto leave;
 301
 302         /* get a spot inside the dir. */
 303         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 304                                               dentry->d_name.name,
 305                                               dentry->d_name.len, &lookup);
 306         if (status < 0) {
 307                 mlog_errno(status);
 308                 goto leave;
 309         }
 310
 311         /* reserve an inode spot */
 312         status = ocfs2_reserve_new_inode(osb, &inode_ac);
 313         if (status < 0) {
 314                 if (status != -ENOSPC)
 315                         mlog_errno(status);
 316                 goto leave;
 317         }
 318
 319         inode = ocfs2_get_init_inode(dir, mode);
 320         if (IS_ERR(inode)) {
 321                 status = PTR_ERR(inode);
 322                 inode = NULL;
 323                 mlog_errno(status);
 324                 goto leave;
 325         }
 326
 327         /* get security xattr */
 328         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
 329         if (status) {
 330                 if (status == -EOPNOTSUPP)
 331                         si.enable = 0;
 332                 else {
 333                         mlog_errno(status);
 334                         goto leave;
 335                 }
 336         }
 337
 338         /* calculate meta data/clusters for setting security and acl xattr */
 339         status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
 340                                        &si, &want_clusters,
 341                                        &xattr_credits, &want_meta);
 342         if (status < 0) {
 343                 mlog_errno(status);
 344                 goto leave;
 345         }
 346
 347         /* Reserve a cluster if creating an extent based directory. */
 348         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
 349                 want_clusters += 1;
 350
 351                 /* Dir indexing requires extra space as well */
 352                 if (ocfs2_supports_indexed_dirs(osb))
 353                         want_meta++;
 354         }
 355
 356         status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
 357         if (status < 0) {
 358                 if (status != -ENOSPC)
 359                         mlog_errno(status);
 360                 goto leave;
 361         }
 362
 363         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
 364         if (status < 0) {
 365                 if (status != -ENOSPC)
 366                         mlog_errno(status);
 367                 goto leave;
 368         }
 369
 370         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
 371                                                             S_ISDIR(mode),
 372                                                             xattr_credits));
 373         if (IS_ERR(handle)) {
 374                 status = PTR_ERR(handle);
 375                 handle = NULL;
 376                 mlog_errno(status);
 377                 goto leave;
 378         }
 379
 380         /* Starting to change things, restart is no longer possible. */
 381         ocfs2_block_signals(&oldset);
 382         did_block_signals = 1;
 383
 384         status = dquot_alloc_inode(inode);
 385         if (status)
 386                 goto leave;
 387         did_quota_inode = 1;
 388
 389         /* do the real work now. */
 390         status = ocfs2_mknod_locked(osb, dir, inode, dev,
 391                                     &new_fe_bh, parent_fe_bh, handle,
 392                                     inode_ac);
 393         if (status < 0) {
 394                 mlog_errno(status);
 395                 goto leave;
 396         }
 397
 398         if (S_ISDIR(mode)) {
 399                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
 400                                             new_fe_bh, data_ac, meta_ac);
 401                 if (status < 0) {
 402                         mlog_errno(status);
 403                         goto leave;
 404                 }
 405
 406                 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
 407                                                  parent_fe_bh,
 408                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 409                 if (status < 0) {
 410                         mlog_errno(status);
 411                         goto leave;
 412                 }
 413                 ocfs2_add_links_count(dirfe, 1);
 414                 ocfs2_journal_dirty(handle, parent_fe_bh);
 415                 inc_nlink(dir);
 416         }
 417
 418         status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
 419                          meta_ac, data_ac);
 420
 421         if (status < 0) {
 422                 mlog_errno(status);
 423                 goto leave;
 424         }
 425
 426         if (si.enable) {
 427                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
 428                                                  meta_ac, data_ac);
 429                 if (status < 0) {
 430                         mlog_errno(status);
 431                         goto leave;
 432                 }
 433         }
 434
 435         /*
 436          * Do this before adding the entry to the directory. We add
 437          * also set d_op after success so that ->d_iput() will cleanup
 438          * the dentry lock even if ocfs2_add_entry() fails below.
 439          */
 440         status = ocfs2_dentry_attach_lock(dentry, inode,
 441                                           OCFS2_I(dir)->ip_blkno);
 442         if (status) {
 443                 mlog_errno(status);
 444                 goto leave;
 445         }
 446
 447         dl = dentry->d_fsdata;
 448
 449         status = ocfs2_add_entry(handle, dentry, inode,
 450                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
 451                                  &lookup);
 452         if (status < 0) {
 453                 mlog_errno(status);
 454                 goto leave;
 455         }
 456
 457         insert_inode_hash(inode);
 458         d_instantiate(dentry, inode);
 459         status = 0;
 460 leave:
 461         if (status < 0 && did_quota_inode)
 462                 dquot_free_inode(inode);
 463         if (handle)
 464                 ocfs2_commit_trans(osb, handle);
 465
 466         ocfs2_inode_unlock(dir, 1);
 467         if (did_block_signals)
 468                 ocfs2_unblock_signals(&oldset);
 469
 470         brelse(new_fe_bh);
 471         brelse(parent_fe_bh);
 472         kfree(si.value);
 473
 474         ocfs2_free_dir_lookup_result(&lookup);
 475
 476         if (inode_ac)
 477                 ocfs2_free_alloc_context(inode_ac);
 478
 479         if (data_ac)
 480                 ocfs2_free_alloc_context(data_ac);
 481
 482         if (meta_ac)
 483                 ocfs2_free_alloc_context(meta_ac);
 484
 485         /*
 486          * We should call iput after the i_mutex of the bitmap been
 487          * unlocked in ocfs2_free_alloc_context, or the
 488          * ocfs2_delete_inode will mutex_lock again.
 489          */
 490         if ((status < 0) && inode) {
 491                 if (dl)
 492                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
 493
 494                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
 495                 clear_nlink(inode);
 496                 iput(inode);
 497         }
 498
 499         if (status)
 500                 mlog_errno(status);
 501
 502         return status;
 503 }
 504
 505 static int __ocfs2_mknod_locked(struct inode *dir,
 506                                 struct inode *inode,
 507                                 dev_t dev,
 508                                 struct buffer_head **new_fe_bh,
 509                                 struct buffer_head *parent_fe_bh,
 510                                 handle_t *handle,
 511                                 struct ocfs2_alloc_context *inode_ac,
 512                                 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
 513 {
 514         int status = 0;
 515         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 516         struct ocfs2_dinode *fe = NULL;
 517         struct ocfs2_extent_list *fel;
 518         u16 feat;
 519         struct ocfs2_inode_info *oi = OCFS2_I(inode);
 520         struct timespec64 ts;
 521
 522         *new_fe_bh = NULL;
 523
 524         /* populate as many fields early on as possible - many of
 525          * these are used by the support functions here and in
 526          * callers. */
 527         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
 528         OCFS2_I(inode)->ip_blkno = fe_blkno;
 529         spin_lock(&osb->osb_lock);
 530         inode->i_generation = osb->s_next_generation++;
 531         spin_unlock(&osb->osb_lock);
 532
 533         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
 534         if (!*new_fe_bh) {
 535                 status = -ENOMEM;
 536                 mlog_errno(status);
 537                 goto leave;
 538         }
 539         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
 540
 541         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
 542                                          *new_fe_bh,
 543                                          OCFS2_JOURNAL_ACCESS_CREATE);
 544         if (status < 0) {
 545                 mlog_errno(status);
 546                 goto leave;
 547         }
 548
 549         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
 550         memset(fe, 0, osb->sb->s_blocksize);
 551
 552         fe->i_generation = cpu_to_le32(inode->i_generation);
 553         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
 554         fe->i_blkno = cpu_to_le64(fe_blkno);
 555         fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
 556         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
 557         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
 558         fe->i_uid = cpu_to_le32(i_uid_read(inode));
 559         fe->i_gid = cpu_to_le32(i_gid_read(inode));
 560         fe->i_mode = cpu_to_le16(inode->i_mode);
 561         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 562                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
 563
 564         ocfs2_set_links_count(fe, inode->i_nlink);
 565
 566         fe->i_last_eb_blk = 0;
 567         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 568         fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
 569         ktime_get_real_ts64(&ts);
 570         fe->i_atime = fe->i_ctime = fe->i_mtime =
 571                 cpu_to_le64(ts.tv_sec);
 572         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
 573                 cpu_to_le32(ts.tv_nsec);
 574         fe->i_dtime = 0;
 575
 576         /*
 577          * If supported, directories start with inline data. If inline
 578          * isn't supported, but indexing is, we start them as indexed.
 579          */
 580         feat = le16_to_cpu(fe->i_dyn_features);
 581         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
 582                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
 583
 584                 fe->id2.i_data.id_count = cpu_to_le16(
 585                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
 586         } else {
 587                 fel = &fe->id2.i_list;
 588                 fel->l_tree_depth = 0;
 589                 fel->l_next_free_rec = 0;
 590                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
 591         }
 592
 593         ocfs2_journal_dirty(handle, *new_fe_bh);
 594
 595         ocfs2_populate_inode(inode, fe, 1);
 596         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
 597         if (!ocfs2_mount_local(osb)) {
 598                 status = ocfs2_create_new_inode_locks(inode);
 599                 if (status < 0)
 600                         mlog_errno(status);
 601         }
 602
 603         oi->i_sync_tid = handle->h_transaction->t_tid;
 604         oi->i_datasync_tid = handle->h_transaction->t_tid;
 605
 606 leave:
 607         if (status < 0) {
 608                 if (*new_fe_bh) {
 609                         brelse(*new_fe_bh);
 610                         *new_fe_bh = NULL;
 611                 }
 612         }
 613
 614         if (status)
 615                 mlog_errno(status);
 616         return status;
 617 }
 618
 619 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 620                               struct inode *dir,
 621                               struct inode *inode,
 622                               dev_t dev,
 623                               struct buffer_head **new_fe_bh,
 624                               struct buffer_head *parent_fe_bh,
 625                               handle_t *handle,
 626                               struct ocfs2_alloc_context *inode_ac)
 627 {
 628         int status = 0;
 629         u64 suballoc_loc, fe_blkno = 0;
 630         u16 suballoc_bit;
 631
 632         *new_fe_bh = NULL;
 633
 634         status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
 635                                        inode_ac, &suballoc_loc,
 636                                        &suballoc_bit, &fe_blkno);
 637         if (status < 0) {
 638                 mlog_errno(status);
 639                 return status;
 640         }
 641
 642         status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
 643                                     parent_fe_bh, handle, inode_ac,
 644                                     fe_blkno, suballoc_loc, suballoc_bit);
 645         if (status < 0) {
 646                 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit);
 647                 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode,
 648                                 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1);
 649                 if (tmp)
 650                         mlog_errno(tmp);
 651         }
 652
 653         return status;
 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         err = dquot_initialize(dir);
 712         if (err) {
 713                 mlog_errno(err);
 714                 return err;
 715         }
 716
 717         err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
 718                         &parent_fe_bh, dir, 0);
 719         if (err < 0) {
 720                 if (err != -ENOENT)
 721                         mlog_errno(err);
 722                 return err;
 723         }
 724
 725         /* make sure both dirs have bhs
 726          * get an extra ref on old_dir_bh if old==new */
 727         if (!parent_fe_bh) {
 728                 if (old_dir_bh) {
 729                         parent_fe_bh = old_dir_bh;
 730                         get_bh(parent_fe_bh);
 731                 } else {
 732                         mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
 733                         err = -EIO;
 734                         goto out;
 735                 }
 736         }
 737
 738         if (!dir->i_nlink) {
 739                 err = -ENOENT;
 740                 goto out;
 741         }
 742
 743         err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
 744                         old_dentry->d_name.len, &old_de_ino);
 745         if (err) {
 746                 err = -ENOENT;
 747                 goto out;
 748         }
 749
 750         /*
 751          * Check whether another node removed the source inode while we
 752          * were in the vfs.
 753          */
 754         if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
 755                 err = -ENOENT;
 756                 goto out;
 757         }
 758
 759         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 760                                         dentry->d_name.len);
 761         if (err)
 762                 goto out;
 763
 764         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 765                                            dentry->d_name.name,
 766                                            dentry->d_name.len, &lookup);
 767         if (err < 0) {
 768                 mlog_errno(err);
 769                 goto out;
 770         }
 771
 772         err = ocfs2_inode_lock(inode, &fe_bh, 1);
 773         if (err < 0) {
 774                 if (err != -ENOENT)
 775                         mlog_errno(err);
 776                 goto out;
 777         }
 778
 779         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 780         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
 781                 err = -EMLINK;
 782                 goto out_unlock_inode;
 783         }
 784
 785         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
 786         if (IS_ERR(handle)) {
 787                 err = PTR_ERR(handle);
 788                 handle = NULL;
 789                 mlog_errno(err);
 790                 goto out_unlock_inode;
 791         }
 792
 793         /* Starting to change things, restart is no longer possible. */
 794         ocfs2_block_signals(&oldset);
 795
 796         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 797                                       OCFS2_JOURNAL_ACCESS_WRITE);
 798         if (err < 0) {
 799                 mlog_errno(err);
 800                 goto out_commit;
 801         }
 802
 803         inc_nlink(inode);
 804         inode->i_ctime = current_time(inode);
 805         ocfs2_set_links_count(fe, inode->i_nlink);
 806         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 807         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 808         ocfs2_journal_dirty(handle, fe_bh);
 809
 810         err = ocfs2_add_entry(handle, dentry, inode,
 811                               OCFS2_I(inode)->ip_blkno,
 812                               parent_fe_bh, &lookup);
 813         if (err) {
 814                 ocfs2_add_links_count(fe, -1);
 815                 drop_nlink(inode);
 816                 mlog_errno(err);
 817                 goto out_commit;
 818         }
 819
 820         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
 821         if (err) {
 822                 mlog_errno(err);
 823                 goto out_commit;
 824         }
 825
 826         ihold(inode);
 827         d_instantiate(dentry, inode);
 828
 829 out_commit:
 830         ocfs2_commit_trans(osb, handle);
 831         ocfs2_unblock_signals(&oldset);
 832 out_unlock_inode:
 833         ocfs2_inode_unlock(inode, 1);
 834
 835 out:
 836         ocfs2_double_unlock(old_dir, dir);
 837
 838         brelse(fe_bh);
 839         brelse(parent_fe_bh);
 840         brelse(old_dir_bh);
 841
 842         ocfs2_free_dir_lookup_result(&lookup);
 843
 844         if (err)
 845                 mlog_errno(err);
 846
 847         return err;
 848 }
 849
 850 /*
 851  * Takes and drops an exclusive lock on the given dentry. This will
 852  * force other nodes to drop it.
 853  */
 854 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 855 {
 856         int ret;
 857
 858         ret = ocfs2_dentry_lock(dentry, 1);
 859         if (ret)
 860                 mlog_errno(ret);
 861         else
 862                 ocfs2_dentry_unlock(dentry, 1);
 863
 864         return ret;
 865 }
 866
 867 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
 868 {
 869         if (S_ISDIR(inode->i_mode)) {
 870                 if (inode->i_nlink == 2)
 871                         return 1;
 872                 return 0;
 873         }
 874
 875         if (inode->i_nlink == 1)
 876                 return 1;
 877         return 0;
 878 }
 879
 880 static int ocfs2_unlink(struct inode *dir,
 881                         struct dentry *dentry)
 882 {
 883         int status;
 884         int child_locked = 0;
 885         bool is_unlinkable = false;
 886         struct inode *inode = d_inode(dentry);
 887         struct inode *orphan_dir = NULL;
 888         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 889         u64 blkno;
 890         struct ocfs2_dinode *fe = NULL;
 891         struct buffer_head *fe_bh = NULL;
 892         struct buffer_head *parent_node_bh = NULL;
 893         handle_t *handle = NULL;
 894         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 895         struct ocfs2_dir_lookup_result lookup = { NULL, };
 896         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
 897
 898         trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
 899                            dentry->d_name.name,
 900                            (unsigned long long)OCFS2_I(dir)->ip_blkno,
 901                            (unsigned long long)OCFS2_I(inode)->ip_blkno);
 902
 903         status = dquot_initialize(dir);
 904         if (status) {
 905                 mlog_errno(status);
 906                 return status;
 907         }
 908
 909         BUG_ON(d_inode(dentry->d_parent) != dir);
 910
 911         if (inode == osb->root_inode)
 912                 return -EPERM;
 913
 914         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
 915                                          OI_LS_PARENT);
 916         if (status < 0) {
 917                 if (status != -ENOENT)
 918                         mlog_errno(status);
 919                 return status;
 920         }
 921
 922         status = ocfs2_find_files_on_disk(dentry->d_name.name,
 923                                           dentry->d_name.len, &blkno, dir,
 924                                           &lookup);
 925         if (status < 0) {
 926                 if (status != -ENOENT)
 927                         mlog_errno(status);
 928                 goto leave;
 929         }
 930
 931         if (OCFS2_I(inode)->ip_blkno != blkno) {
 932                 status = -ENOENT;
 933
 934                 trace_ocfs2_unlink_noent(
 935                                 (unsigned long long)OCFS2_I(inode)->ip_blkno,
 936                                 (unsigned long long)blkno,
 937                                 OCFS2_I(inode)->ip_flags);
 938                 goto leave;
 939         }
 940
 941         status = ocfs2_inode_lock(inode, &fe_bh, 1);
 942         if (status < 0) {
 943                 if (status != -ENOENT)
 944                         mlog_errno(status);
 945                 goto leave;
 946         }
 947         child_locked = 1;
 948
 949         if (S_ISDIR(inode->i_mode)) {
 950                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
 951                         status = -ENOTEMPTY;
 952                         goto leave;
 953                 }
 954         }
 955
 956         status = ocfs2_remote_dentry_delete(dentry);
 957         if (status < 0) {
 958                 /* This remote delete should succeed under all normal
 959                  * circumstances. */
 960                 mlog_errno(status);
 961                 goto leave;
 962         }
 963
 964         if (ocfs2_inode_is_unlinkable(inode)) {
 965                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
 966                                                   OCFS2_I(inode)->ip_blkno,
 967                                                   orphan_name, &orphan_insert,
 968                                                   false);
 969                 if (status < 0) {
 970                         mlog_errno(status);
 971                         goto leave;
 972                 }
 973                 is_unlinkable = true;
 974         }
 975
 976         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
 977         if (IS_ERR(handle)) {
 978                 status = PTR_ERR(handle);
 979                 handle = NULL;
 980                 mlog_errno(status);
 981                 goto leave;
 982         }
 983
 984         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 985                                          OCFS2_JOURNAL_ACCESS_WRITE);
 986         if (status < 0) {
 987                 mlog_errno(status);
 988                 goto leave;
 989         }
 990
 991         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 992
 993         /* delete the name from the parent dir */
 994         status = ocfs2_delete_entry(handle, dir, &lookup);
 995         if (status < 0) {
 996                 mlog_errno(status);
 997                 goto leave;
 998         }
 999
1000         if (S_ISDIR(inode->i_mode))
1001                 drop_nlink(inode);
1002         drop_nlink(inode);
1003         ocfs2_set_links_count(fe, inode->i_nlink);
1004         ocfs2_journal_dirty(handle, fe_bh);
1005
1006         dir->i_ctime = dir->i_mtime = current_time(dir);
1007         if (S_ISDIR(inode->i_mode))
1008                 drop_nlink(dir);
1009
1010         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1011         if (status < 0) {
1012                 mlog_errno(status);
1013                 if (S_ISDIR(inode->i_mode))
1014                         inc_nlink(dir);
1015                 goto leave;
1016         }
1017
1018         if (is_unlinkable) {
1019                 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1020                                 orphan_name, &orphan_insert, orphan_dir, false);
1021                 if (status < 0)
1022                         mlog_errno(status);
1023         }
1024
1025 leave:
1026         if (handle)
1027                 ocfs2_commit_trans(osb, handle);
1028
1029         if (orphan_dir) {
1030                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1031                 ocfs2_inode_unlock(orphan_dir, 1);
1032                 inode_unlock(orphan_dir);
1033                 iput(orphan_dir);
1034         }
1035
1036         if (child_locked)
1037                 ocfs2_inode_unlock(inode, 1);
1038
1039         ocfs2_inode_unlock(dir, 1);
1040
1041         brelse(fe_bh);
1042         brelse(parent_node_bh);
1043
1044         ocfs2_free_dir_lookup_result(&orphan_insert);
1045         ocfs2_free_dir_lookup_result(&lookup);
1046
1047         if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1048                 mlog_errno(status);
1049
1050         return status;
1051 }
1052
1053 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1054                 u64 src_inode_no, u64 dest_inode_no)
1055 {
1056         int ret = 0, i = 0;
1057         u64 parent_inode_no = 0;
1058         u64 child_inode_no = src_inode_no;
1059         struct inode *child_inode;
1060
1061 #define MAX_LOOKUP_TIMES 32
1062         while (1) {
1063                 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1064                 if (IS_ERR(child_inode)) {
1065                         ret = PTR_ERR(child_inode);
1066                         break;
1067                 }
1068
1069                 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1070                 if (ret < 0) {
1071                         iput(child_inode);
1072                         if (ret != -ENOENT)
1073                                 mlog_errno(ret);
1074                         break;
1075                 }
1076
1077                 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1078                                 &parent_inode_no);
1079                 ocfs2_inode_unlock(child_inode, 0);
1080                 iput(child_inode);
1081                 if (ret < 0) {
1082                         ret = -ENOENT;
1083                         break;
1084                 }
1085
1086                 if (parent_inode_no == dest_inode_no) {
1087                         ret = 1;
1088                         break;
1089                 }
1090
1091                 if (parent_inode_no == osb->root_inode->i_ino) {
1092                         ret = 0;
1093                         break;
1094                 }
1095
1096                 child_inode_no = parent_inode_no;
1097
1098                 if (++i >= MAX_LOOKUP_TIMES) {
1099                         mlog(ML_NOTICE, "max lookup times reached, filesystem "
1100                                         "may have nested directories, "
1101                                         "src inode: %llu, dest inode: %llu.\n",
1102                                         (unsigned long long)src_inode_no,
1103                                         (unsigned long long)dest_inode_no);
1104                         ret = 0;
1105                         break;
1106                 }
1107         }
1108
1109         return ret;
1110 }
1111
1112 /*
1113  * The only place this should be used is rename and link!
1114  * if they have the same id, then the 1st one is the only one locked.
1115  */
1116 static int ocfs2_double_lock(struct ocfs2_super *osb,
1117                              struct buffer_head **bh1,
1118                              struct inode *inode1,
1119                              struct buffer_head **bh2,
1120                              struct inode *inode2,
1121                              int rename)
1122 {
1123         int status;
1124         int inode1_is_ancestor, inode2_is_ancestor;
1125         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1126         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1127
1128         trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1129                                 (unsigned long long)oi2->ip_blkno);
1130
1131         if (*bh1)
1132                 *bh1 = NULL;
1133         if (*bh2)
1134                 *bh2 = NULL;
1135
1136         /* we always want to lock the one with the lower lockid first.
1137          * and if they are nested, we lock ancestor first */
1138         if (oi1->ip_blkno != oi2->ip_blkno) {
1139                 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1140                                 oi1->ip_blkno);
1141                 if (inode1_is_ancestor < 0) {
1142                         status = inode1_is_ancestor;
1143                         goto bail;
1144                 }
1145
1146                 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1147                                 oi2->ip_blkno);
1148                 if (inode2_is_ancestor < 0) {
1149                         status = inode2_is_ancestor;
1150                         goto bail;
1151                 }
1152
1153                 if ((inode1_is_ancestor == 1) ||
1154                                 (oi1->ip_blkno < oi2->ip_blkno &&
1155                                 inode2_is_ancestor == 0)) {
1156                         /* switch id1 and id2 around */
1157                         swap(bh2, bh1);
1158                         swap(inode2, inode1);
1159                 }
1160                 /* lock id2 */
1161                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1162                                 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1163                 if (status < 0) {
1164                         if (status != -ENOENT)
1165                                 mlog_errno(status);
1166                         goto bail;
1167                 }
1168         }
1169
1170         /* lock id1 */
1171         status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1172                         rename == 1 ?  OI_LS_RENAME2 : OI_LS_PARENT);
1173         if (status < 0) {
1174                 /*
1175                  * An error return must mean that no cluster locks
1176                  * were held on function exit.
1177                  */
1178                 if (oi1->ip_blkno != oi2->ip_blkno) {
1179                         ocfs2_inode_unlock(inode2, 1);
1180                         brelse(*bh2);
1181                         *bh2 = NULL;
1182                 }
1183
1184                 if (status != -ENOENT)
1185                         mlog_errno(status);
1186         }
1187
1188         trace_ocfs2_double_lock_end(
1189                         (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1190                         (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1191
1192 bail:
1193         if (status)
1194                 mlog_errno(status);
1195         return status;
1196 }
1197
1198 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1199 {
1200         ocfs2_inode_unlock(inode1, 1);
1201
1202         if (inode1 != inode2)
1203                 ocfs2_inode_unlock(inode2, 1);
1204 }
1205
1206 static int ocfs2_rename(struct inode *old_dir,
1207                         struct dentry *old_dentry,
1208                         struct inode *new_dir,
1209                         struct dentry *new_dentry,
1210                         unsigned int flags)
1211 {
1212         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1213         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1214         struct inode *old_inode = d_inode(old_dentry);
1215         struct inode *new_inode = d_inode(new_dentry);
1216         struct inode *orphan_dir = NULL;
1217         struct ocfs2_dinode *newfe = NULL;
1218         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1219         struct buffer_head *newfe_bh = NULL;
1220         struct buffer_head *old_inode_bh = NULL;
1221         struct ocfs2_super *osb = NULL;
1222         u64 newfe_blkno, old_de_ino;
1223         handle_t *handle = NULL;
1224         struct buffer_head *old_dir_bh = NULL;
1225         struct buffer_head *new_dir_bh = NULL;
1226         u32 old_dir_nlink = old_dir->i_nlink;
1227         struct ocfs2_dinode *old_di;
1228         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1229         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1230         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1231         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1232         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1233         bool should_add_orphan = false;
1234
1235         if (flags)
1236                 return -EINVAL;
1237
1238         /* At some point it might be nice to break this function up a
1239          * bit. */
1240
1241         trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1242                            old_dentry->d_name.len, old_dentry->d_name.name,
1243                            new_dentry->d_name.len, new_dentry->d_name.name);
1244
1245         status = dquot_initialize(old_dir);
1246         if (status) {
1247                 mlog_errno(status);
1248                 goto bail;
1249         }
1250         status = dquot_initialize(new_dir);
1251         if (status) {
1252                 mlog_errno(status);
1253                 goto bail;
1254         }
1255
1256         osb = OCFS2_SB(old_dir->i_sb);
1257
1258         if (new_inode) {
1259                 if (!igrab(new_inode))
1260                         BUG();
1261         }
1262
1263         /* Assume a directory hierarchy thusly:
1264          * a/b/c
1265          * a/d
1266          * a,b,c, and d are all directories.
1267          *
1268          * from cwd of 'a' on both nodes:
1269          * node1: mv b/c d
1270          * node2: mv d   b/c
1271          *
1272          * And that's why, just like the VFS, we need a file system
1273          * rename lock. */
1274         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1275                 status = ocfs2_rename_lock(osb);
1276                 if (status < 0) {
1277                         mlog_errno(status);
1278                         goto bail;
1279                 }
1280                 rename_lock = 1;
1281
1282                 /* here we cannot guarantee the inodes haven't just been
1283                  * changed, so check if they are nested again */
1284                 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1285                                 old_inode->i_ino);
1286                 if (status < 0) {
1287                         mlog_errno(status);
1288                         goto bail;
1289                 } else if (status == 1) {
1290                         status = -EPERM;
1291                         trace_ocfs2_rename_not_permitted(
1292                                         (unsigned long long)old_inode->i_ino,
1293                                         (unsigned long long)new_dir->i_ino);
1294                         goto bail;
1295                 }
1296         }
1297
1298         /* if old and new are the same, this'll just do one lock. */
1299         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1300                                    &new_dir_bh, new_dir, 1);
1301         if (status < 0) {
1302                 mlog_errno(status);
1303                 goto bail;
1304         }
1305         parents_locked = 1;
1306
1307         if (!new_dir->i_nlink) {
1308                 status = -EACCES;
1309                 goto bail;
1310         }
1311
1312         /* make sure both dirs have bhs
1313          * get an extra ref on old_dir_bh if old==new */
1314         if (!new_dir_bh) {
1315                 if (old_dir_bh) {
1316                         new_dir_bh = old_dir_bh;
1317                         get_bh(new_dir_bh);
1318                 } else {
1319                         mlog(ML_ERROR, "no old_dir_bh!\n");
1320                         status = -EIO;
1321                         goto bail;
1322                 }
1323         }
1324
1325         /*
1326          * Aside from allowing a meta data update, the locking here
1327          * also ensures that the downconvert thread on other nodes
1328          * won't have to concurrently downconvert the inode and the
1329          * dentry locks.
1330          */
1331         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1332                                          OI_LS_PARENT);
1333         if (status < 0) {
1334                 if (status != -ENOENT)
1335                         mlog_errno(status);
1336                 goto bail;
1337         }
1338         old_child_locked = 1;
1339
1340         status = ocfs2_remote_dentry_delete(old_dentry);
1341         if (status < 0) {
1342                 mlog_errno(status);
1343                 goto bail;
1344         }
1345
1346         if (S_ISDIR(old_inode->i_mode)) {
1347                 u64 old_inode_parent;
1348
1349                 update_dot_dot = 1;
1350                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1351                                                   old_inode,
1352                                                   &old_inode_dot_dot_res);
1353                 if (status) {
1354                         status = -EIO;
1355                         goto bail;
1356                 }
1357
1358                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1359                         status = -EIO;
1360                         goto bail;
1361                 }
1362
1363                 if (!new_inode && new_dir != old_dir &&
1364                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1365                         status = -EMLINK;
1366                         goto bail;
1367                 }
1368         }
1369
1370         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1371                                             old_dentry->d_name.len,
1372                                             &old_de_ino);
1373         if (status) {
1374                 status = -ENOENT;
1375                 goto bail;
1376         }
1377
1378         /*
1379          *  Check for inode number is _not_ due to possible IO errors.
1380          *  We might rmdir the source, keep it as pwd of some process
1381          *  and merrily kill the link to whatever was created under the
1382          *  same name. Goodbye sticky bit ;-<
1383          */
1384         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1385                 status = -ENOENT;
1386                 goto bail;
1387         }
1388
1389         /* check if the target already exists (in which case we need
1390          * to delete it */
1391         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1392                                           new_dentry->d_name.len,
1393                                           &newfe_blkno, new_dir,
1394                                           &target_lookup_res);
1395         /* The only error we allow here is -ENOENT because the new
1396          * file not existing is perfectly valid. */
1397         if ((status < 0) && (status != -ENOENT)) {
1398                 /* If we cannot find the file specified we should just */
1399                 /* return the error... */
1400                 mlog_errno(status);
1401                 goto bail;
1402         }
1403         if (status == 0)
1404                 target_exists = 1;
1405
1406         if (!target_exists && new_inode) {
1407                 /*
1408                  * Target was unlinked by another node while we were
1409                  * waiting to get to ocfs2_rename(). There isn't
1410                  * anything we can do here to help the situation, so
1411                  * bubble up the appropriate error.
1412                  */
1413                 status = -ENOENT;
1414                 goto bail;
1415         }
1416
1417         /* In case we need to overwrite an existing file, we blow it
1418          * away first */
1419         if (target_exists) {
1420                 /* VFS didn't think there existed an inode here, but
1421                  * someone else in the cluster must have raced our
1422                  * rename to create one. Today we error cleanly, in
1423                  * the future we should consider calling iget to build
1424                  * a new struct inode for this entry. */
1425                 if (!new_inode) {
1426                         status = -EACCES;
1427
1428                         trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1429                                                 new_dentry->d_name.name);
1430                         goto bail;
1431                 }
1432
1433                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1434                         status = -EACCES;
1435
1436                         trace_ocfs2_rename_disagree(
1437                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1438                              (unsigned long long)newfe_blkno,
1439                              OCFS2_I(new_inode)->ip_flags);
1440                         goto bail;
1441                 }
1442
1443                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1444                 if (status < 0) {
1445                         if (status != -ENOENT)
1446                                 mlog_errno(status);
1447                         goto bail;
1448                 }
1449                 new_child_locked = 1;
1450
1451                 status = ocfs2_remote_dentry_delete(new_dentry);
1452                 if (status < 0) {
1453                         mlog_errno(status);
1454                         goto bail;
1455                 }
1456
1457                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1458
1459                 trace_ocfs2_rename_over_existing(
1460                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1461                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1462
1463                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1464                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1465                                                 OCFS2_I(new_inode)->ip_blkno,
1466                                                 orphan_name, &orphan_insert,
1467                                                 false);
1468                         if (status < 0) {
1469                                 mlog_errno(status);
1470                                 goto bail;
1471                         }
1472                         should_add_orphan = true;
1473                 }
1474         } else {
1475                 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1476
1477                 status = ocfs2_check_dir_for_entry(new_dir,
1478                                                    new_dentry->d_name.name,
1479                                                    new_dentry->d_name.len);
1480                 if (status)
1481                         goto bail;
1482
1483                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1484                                                       new_dentry->d_name.name,
1485                                                       new_dentry->d_name.len,
1486                                                       &target_insert);
1487                 if (status < 0) {
1488                         mlog_errno(status);
1489                         goto bail;
1490                 }
1491         }
1492
1493         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1494         if (IS_ERR(handle)) {
1495                 status = PTR_ERR(handle);
1496                 handle = NULL;
1497                 mlog_errno(status);
1498                 goto bail;
1499         }
1500
1501         if (target_exists) {
1502                 if (S_ISDIR(new_inode->i_mode)) {
1503                         if (new_inode->i_nlink != 2 ||
1504                             !ocfs2_empty_dir(new_inode)) {
1505                                 status = -ENOTEMPTY;
1506                                 goto bail;
1507                         }
1508                 }
1509                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1510                                                  newfe_bh,
1511                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1512                 if (status < 0) {
1513                         mlog_errno(status);
1514                         goto bail;
1515                 }
1516
1517                 /* change the dirent to point to the correct inode */
1518                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1519                                             old_inode);
1520                 if (status < 0) {
1521                         mlog_errno(status);
1522                         goto bail;
1523                 }
1524                 inode_inc_iversion(new_dir);
1525
1526                 if (S_ISDIR(new_inode->i_mode))
1527                         ocfs2_set_links_count(newfe, 0);
1528                 else
1529                         ocfs2_add_links_count(newfe, -1);
1530                 ocfs2_journal_dirty(handle, newfe_bh);
1531                 if (should_add_orphan) {
1532                         status = ocfs2_orphan_add(osb, handle, new_inode,
1533                                         newfe_bh, orphan_name,
1534                                         &orphan_insert, orphan_dir, false);
1535                         if (status < 0) {
1536                                 mlog_errno(status);
1537                                 goto bail;
1538                         }
1539                 }
1540         } else {
1541                 /* if the name was not found in new_dir, add it now */
1542                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1543                                          OCFS2_I(old_inode)->ip_blkno,
1544                                          new_dir_bh, &target_insert);
1545         }
1546
1547         old_inode->i_ctime = current_time(old_inode);
1548         mark_inode_dirty(old_inode);
1549
1550         status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1551                                          old_inode_bh,
1552                                          OCFS2_JOURNAL_ACCESS_WRITE);
1553         if (status >= 0) {
1554                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1555
1556                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1557                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1558                 ocfs2_journal_dirty(handle, old_inode_bh);
1559         } else
1560                 mlog_errno(status);
1561
1562         /*
1563          * Now that the name has been added to new_dir, remove the old name.
1564          *
1565          * We don't keep any directory entry context around until now
1566          * because the insert might have changed the type of directory
1567          * we're dealing with.
1568          */
1569         status = ocfs2_find_entry(old_dentry->d_name.name,
1570                                   old_dentry->d_name.len, old_dir,
1571                                   &old_entry_lookup);
1572         if (status) {
1573                 if (!is_journal_aborted(osb->journal->j_journal)) {
1574                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1575                                         "is not deleted.",
1576                                         new_dentry->d_name.len, new_dentry->d_name.name,
1577                                         old_dentry->d_name.len, old_dentry->d_name.name);
1578                 }
1579                 goto bail;
1580         }
1581
1582         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1583         if (status < 0) {
1584                 mlog_errno(status);
1585                 if (!is_journal_aborted(osb->journal->j_journal)) {
1586                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1587                                         "is not deleted.",
1588                                         new_dentry->d_name.len, new_dentry->d_name.name,
1589                                         old_dentry->d_name.len, old_dentry->d_name.name);
1590                 }
1591                 goto bail;
1592         }
1593
1594         if (new_inode) {
1595                 drop_nlink(new_inode);
1596                 new_inode->i_ctime = current_time(new_inode);
1597         }
1598         old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
1599
1600         if (update_dot_dot) {
1601                 status = ocfs2_update_entry(old_inode, handle,
1602                                             &old_inode_dot_dot_res, new_dir);
1603                 drop_nlink(old_dir);
1604                 if (new_inode) {
1605                         drop_nlink(new_inode);
1606                 } else {
1607                         inc_nlink(new_dir);
1608                         mark_inode_dirty(new_dir);
1609                 }
1610         }
1611         mark_inode_dirty(old_dir);
1612         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1613         if (new_inode) {
1614                 mark_inode_dirty(new_inode);
1615                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1616         }
1617
1618         if (old_dir != new_dir) {
1619                 /* Keep the same times on both directories.*/
1620                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1621
1622                 /*
1623                  * This will also pick up the i_nlink change from the
1624                  * block above.
1625                  */
1626                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1627         }
1628
1629         if (old_dir_nlink != old_dir->i_nlink) {
1630                 if (!old_dir_bh) {
1631                         mlog(ML_ERROR, "need to change nlink for old dir "
1632                              "%llu from %d to %d but bh is NULL!\n",
1633                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1634                              (int)old_dir_nlink, old_dir->i_nlink);
1635                 } else {
1636                         struct ocfs2_dinode *fe;
1637                         status = ocfs2_journal_access_di(handle,
1638                                                          INODE_CACHE(old_dir),
1639                                                          old_dir_bh,
1640                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1641                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1642                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1643                         ocfs2_journal_dirty(handle, old_dir_bh);
1644                 }
1645         }
1646         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1647         status = 0;
1648 bail:
1649         if (handle)
1650                 ocfs2_commit_trans(osb, handle);
1651
1652         if (orphan_dir) {
1653                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1654                 ocfs2_inode_unlock(orphan_dir, 1);
1655                 inode_unlock(orphan_dir);
1656                 iput(orphan_dir);
1657         }
1658
1659         if (new_child_locked)
1660                 ocfs2_inode_unlock(new_inode, 1);
1661
1662         if (old_child_locked)
1663                 ocfs2_inode_unlock(old_inode, 1);
1664
1665         if (parents_locked)
1666                 ocfs2_double_unlock(old_dir, new_dir);
1667
1668         if (rename_lock)
1669                 ocfs2_rename_unlock(osb);
1670
1671         if (new_inode)
1672                 sync_mapping_buffers(old_inode->i_mapping);
1673
1674         iput(new_inode);
1675
1676         ocfs2_free_dir_lookup_result(&target_lookup_res);
1677         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1678         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1679         ocfs2_free_dir_lookup_result(&orphan_insert);
1680         ocfs2_free_dir_lookup_result(&target_insert);
1681
1682         brelse(newfe_bh);
1683         brelse(old_inode_bh);
1684         brelse(old_dir_bh);
1685         brelse(new_dir_bh);
1686
1687         if (status)
1688                 mlog_errno(status);
1689
1690         return status;
1691 }
1692
1693 /*
1694  * we expect i_size = strlen(symname). Copy symname into the file
1695  * data, including the null terminator.
1696  */
1697 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1698                                      handle_t *handle,
1699                                      struct inode *inode,
1700                                      const char *symname)
1701 {
1702         struct buffer_head **bhs = NULL;
1703         const char *c;
1704         struct super_block *sb = osb->sb;
1705         u64 p_blkno, p_blocks;
1706         int virtual, blocks, status, i, bytes_left;
1707
1708         bytes_left = i_size_read(inode) + 1;
1709         /* we can't trust i_blocks because we're actually going to
1710          * write i_size + 1 bytes. */
1711         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1712
1713         trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1714                                         i_size_read(inode), blocks);
1715
1716         /* Sanity check -- make sure we're going to fit. */
1717         if (bytes_left >
1718             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1719                 status = -EIO;
1720                 mlog_errno(status);
1721                 goto bail;
1722         }
1723
1724         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1725         if (!bhs) {
1726                 status = -ENOMEM;
1727                 mlog_errno(status);
1728                 goto bail;
1729         }
1730
1731         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1732                                              NULL);
1733         if (status < 0) {
1734                 mlog_errno(status);
1735                 goto bail;
1736         }
1737
1738         /* links can never be larger than one cluster so we know this
1739          * is all going to be contiguous, but do a sanity check
1740          * anyway. */
1741         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1742                 status = -EIO;
1743                 mlog_errno(status);
1744                 goto bail;
1745         }
1746
1747         virtual = 0;
1748         while(bytes_left > 0) {
1749                 c = &symname[virtual * sb->s_blocksize];
1750
1751                 bhs[virtual] = sb_getblk(sb, p_blkno);
1752                 if (!bhs[virtual]) {
1753                         status = -ENOMEM;
1754                         mlog_errno(status);
1755                         goto bail;
1756                 }
1757                 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1758                                               bhs[virtual]);
1759
1760                 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1761                                               bhs[virtual],
1762                                               OCFS2_JOURNAL_ACCESS_CREATE);
1763                 if (status < 0) {
1764                         mlog_errno(status);
1765                         goto bail;
1766                 }
1767
1768                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1769
1770                 memcpy(bhs[virtual]->b_data, c,
1771                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1772                        bytes_left);
1773
1774                 ocfs2_journal_dirty(handle, bhs[virtual]);
1775
1776                 virtual++;
1777                 p_blkno++;
1778                 bytes_left -= sb->s_blocksize;
1779         }
1780
1781         status = 0;
1782 bail:
1783
1784         if (bhs) {
1785                 for(i = 0; i < blocks; i++)
1786                         brelse(bhs[i]);
1787                 kfree(bhs);
1788         }
1789
1790         if (status)
1791                 mlog_errno(status);
1792         return status;
1793 }
1794
1795 static int ocfs2_symlink(struct inode *dir,
1796                          struct dentry *dentry,
1797                          const char *symname)
1798 {
1799         int status, l, credits;
1800         u64 newsize;
1801         struct ocfs2_super *osb = NULL;
1802         struct inode *inode = NULL;
1803         struct super_block *sb;
1804         struct buffer_head *new_fe_bh = NULL;
1805         struct buffer_head *parent_fe_bh = NULL;
1806         struct ocfs2_dinode *fe = NULL;
1807         struct ocfs2_dinode *dirfe;
1808         handle_t *handle = NULL;
1809         struct ocfs2_alloc_context *inode_ac = NULL;
1810         struct ocfs2_alloc_context *data_ac = NULL;
1811         struct ocfs2_alloc_context *xattr_ac = NULL;
1812         int want_clusters = 0;
1813         int xattr_credits = 0;
1814         struct ocfs2_security_xattr_info si = {
1815                 .enable = 1,
1816         };
1817         int did_quota = 0, did_quota_inode = 0;
1818         struct ocfs2_dir_lookup_result lookup = { NULL, };
1819         sigset_t oldset;
1820         int did_block_signals = 0;
1821         struct ocfs2_dentry_lock *dl = NULL;
1822
1823         trace_ocfs2_symlink_begin(dir, dentry, symname,
1824                                   dentry->d_name.len, dentry->d_name.name);
1825
1826         status = dquot_initialize(dir);
1827         if (status) {
1828                 mlog_errno(status);
1829                 goto bail;
1830         }
1831
1832         sb = dir->i_sb;
1833         osb = OCFS2_SB(sb);
1834
1835         l = strlen(symname) + 1;
1836
1837         credits = ocfs2_calc_symlink_credits(sb);
1838
1839         /* lock the parent directory */
1840         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1841         if (status < 0) {
1842                 if (status != -ENOENT)
1843                         mlog_errno(status);
1844                 return status;
1845         }
1846
1847         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1848         if (!ocfs2_read_links_count(dirfe)) {
1849                 /* can't make a file in a deleted directory. */
1850                 status = -ENOENT;
1851                 goto bail;
1852         }
1853
1854         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1855                                            dentry->d_name.len);
1856         if (status)
1857                 goto bail;
1858
1859         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1860                                               dentry->d_name.name,
1861                                               dentry->d_name.len, &lookup);
1862         if (status < 0) {
1863                 mlog_errno(status);
1864                 goto bail;
1865         }
1866
1867         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1868         if (status < 0) {
1869                 if (status != -ENOSPC)
1870                         mlog_errno(status);
1871                 goto bail;
1872         }
1873
1874         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1875         if (IS_ERR(inode)) {
1876                 status = PTR_ERR(inode);
1877                 inode = NULL;
1878                 mlog_errno(status);
1879                 goto bail;
1880         }
1881
1882         /* get security xattr */
1883         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1884         if (status) {
1885                 if (status == -EOPNOTSUPP)
1886                         si.enable = 0;
1887                 else {
1888                         mlog_errno(status);
1889                         goto bail;
1890                 }
1891         }
1892
1893         /* calculate meta data/clusters for setting security xattr */
1894         if (si.enable) {
1895                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1896                                                   &xattr_credits, &xattr_ac);
1897                 if (status < 0) {
1898                         mlog_errno(status);
1899                         goto bail;
1900                 }
1901         }
1902
1903         /* don't reserve bitmap space for fast symlinks. */
1904         if (l > ocfs2_fast_symlink_chars(sb))
1905                 want_clusters += 1;
1906
1907         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1908         if (status < 0) {
1909                 if (status != -ENOSPC)
1910                         mlog_errno(status);
1911                 goto bail;
1912         }
1913
1914         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1915         if (IS_ERR(handle)) {
1916                 status = PTR_ERR(handle);
1917                 handle = NULL;
1918                 mlog_errno(status);
1919                 goto bail;
1920         }
1921
1922         /* Starting to change things, restart is no longer possible. */
1923         ocfs2_block_signals(&oldset);
1924         did_block_signals = 1;
1925
1926         status = dquot_alloc_inode(inode);
1927         if (status)
1928                 goto bail;
1929         did_quota_inode = 1;
1930
1931         trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1932                                    dentry->d_name.name,
1933                                    (unsigned long long)OCFS2_I(dir)->ip_blkno,
1934                                    inode->i_mode);
1935
1936         status = ocfs2_mknod_locked(osb, dir, inode,
1937                                     0, &new_fe_bh, parent_fe_bh, handle,
1938                                     inode_ac);
1939         if (status < 0) {
1940                 mlog_errno(status);
1941                 goto bail;
1942         }
1943
1944         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1945         inode->i_rdev = 0;
1946         newsize = l - 1;
1947         inode->i_op = &ocfs2_symlink_inode_operations;
1948         inode_nohighmem(inode);
1949         if (l > ocfs2_fast_symlink_chars(sb)) {
1950                 u32 offset = 0;
1951
1952                 status = dquot_alloc_space_nodirty(inode,
1953                     ocfs2_clusters_to_bytes(osb->sb, 1));
1954                 if (status)
1955                         goto bail;
1956                 did_quota = 1;
1957                 inode->i_mapping->a_ops = &ocfs2_aops;
1958                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1959                                               new_fe_bh,
1960                                               handle, data_ac, NULL,
1961                                               NULL);
1962                 if (status < 0) {
1963                         if (status != -ENOSPC && status != -EINTR) {
1964                                 mlog(ML_ERROR,
1965                                      "Failed to extend file to %llu\n",
1966                                      (unsigned long long)newsize);
1967                                 mlog_errno(status);
1968                                 status = -ENOSPC;
1969                         }
1970                         goto bail;
1971                 }
1972                 i_size_write(inode, newsize);
1973                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1974         } else {
1975                 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1976                 memcpy((char *) fe->id2.i_symlink, symname, l);
1977                 i_size_write(inode, newsize);
1978                 inode->i_blocks = 0;
1979         }
1980
1981         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1982         if (status < 0) {
1983                 mlog_errno(status);
1984                 goto bail;
1985         }
1986
1987         if (!ocfs2_inode_is_fast_symlink(inode)) {
1988                 status = ocfs2_create_symlink_data(osb, handle, inode,
1989                                                    symname);
1990                 if (status < 0) {
1991                         mlog_errno(status);
1992                         goto bail;
1993                 }
1994         }
1995
1996         if (si.enable) {
1997                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1998                                                  xattr_ac, data_ac);
1999                 if (status < 0) {
2000                         mlog_errno(status);
2001                         goto bail;
2002                 }
2003         }
2004
2005         /*
2006          * Do this before adding the entry to the directory. We add
2007          * also set d_op after success so that ->d_iput() will cleanup
2008          * the dentry lock even if ocfs2_add_entry() fails below.
2009          */
2010         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2011         if (status) {
2012                 mlog_errno(status);
2013                 goto bail;
2014         }
2015
2016         dl = dentry->d_fsdata;
2017
2018         status = ocfs2_add_entry(handle, dentry, inode,
2019                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
2020                                  &lookup);
2021         if (status < 0) {
2022                 mlog_errno(status);
2023                 goto bail;
2024         }
2025
2026         insert_inode_hash(inode);
2027         d_instantiate(dentry, inode);
2028 bail:
2029         if (status < 0 && did_quota)
2030                 dquot_free_space_nodirty(inode,
2031                                         ocfs2_clusters_to_bytes(osb->sb, 1));
2032         if (status < 0 && did_quota_inode)
2033                 dquot_free_inode(inode);
2034         if (handle)
2035                 ocfs2_commit_trans(osb, handle);
2036
2037         ocfs2_inode_unlock(dir, 1);
2038         if (did_block_signals)
2039                 ocfs2_unblock_signals(&oldset);
2040
2041         brelse(new_fe_bh);
2042         brelse(parent_fe_bh);
2043         kfree(si.value);
2044         ocfs2_free_dir_lookup_result(&lookup);
2045         if (inode_ac)
2046                 ocfs2_free_alloc_context(inode_ac);
2047         if (data_ac)
2048                 ocfs2_free_alloc_context(data_ac);
2049         if (xattr_ac)
2050                 ocfs2_free_alloc_context(xattr_ac);
2051         if ((status < 0) && inode) {
2052                 if (dl)
2053                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2054
2055                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2056                 clear_nlink(inode);
2057                 iput(inode);
2058         }
2059
2060         if (status)
2061                 mlog_errno(status);
2062
2063         return status;
2064 }
2065
2066 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2067 {
2068         int status, namelen;
2069
2070         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2071                            (long long)blkno);
2072         if (namelen <= 0) {
2073                 if (namelen)
2074                         status = namelen;
2075                 else
2076                         status = -EINVAL;
2077                 mlog_errno(status);
2078                 goto bail;
2079         }
2080         if (namelen != OCFS2_ORPHAN_NAMELEN) {
2081                 status = -EINVAL;
2082                 mlog_errno(status);
2083                 goto bail;
2084         }
2085
2086         trace_ocfs2_blkno_stringify(blkno, name, namelen);
2087
2088         status = 0;
2089 bail:
2090         if (status < 0)
2091                 mlog_errno(status);
2092         return status;
2093 }
2094
2095 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2096                                         struct inode **ret_orphan_dir,
2097                                         struct buffer_head **ret_orphan_dir_bh)
2098 {
2099         struct inode *orphan_dir_inode;
2100         struct buffer_head *orphan_dir_bh = NULL;
2101         int ret = 0;
2102
2103         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2104                                                        ORPHAN_DIR_SYSTEM_INODE,
2105                                                        osb->slot_num);
2106         if (!orphan_dir_inode) {
2107                 ret = -ENOENT;
2108                 mlog_errno(ret);
2109                 return ret;
2110         }
2111
2112         inode_lock(orphan_dir_inode);
2113
2114         ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2115         if (ret < 0) {
2116                 inode_unlock(orphan_dir_inode);
2117                 iput(orphan_dir_inode);
2118
2119                 mlog_errno(ret);
2120                 return ret;
2121         }
2122
2123         *ret_orphan_dir = orphan_dir_inode;
2124         *ret_orphan_dir_bh = orphan_dir_bh;
2125
2126         return 0;
2127 }
2128
2129 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2130                                       struct buffer_head *orphan_dir_bh,
2131                                       u64 blkno,
2132                                       char *name,
2133                                       struct ocfs2_dir_lookup_result *lookup,
2134                                       bool dio)
2135 {
2136         int ret;
2137         struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2138         int namelen = dio ?
2139                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2140                         OCFS2_ORPHAN_NAMELEN;
2141
2142         if (dio) {
2143                 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2144                                 OCFS2_DIO_ORPHAN_PREFIX);
2145                 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2146                         ret = -EINVAL;
2147                         mlog_errno(ret);
2148                         return ret;
2149                 }
2150
2151                 ret = ocfs2_blkno_stringify(blkno,
2152                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2153         } else
2154                 ret = ocfs2_blkno_stringify(blkno, name);
2155         if (ret < 0) {
2156                 mlog_errno(ret);
2157                 return ret;
2158         }
2159
2160         ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2161                                            orphan_dir_bh, name,
2162                                            namelen, lookup);
2163         if (ret < 0) {
2164                 mlog_errno(ret);
2165                 return ret;
2166         }
2167
2168         return 0;
2169 }
2170
2171 /**
2172  * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2173  * insertion of an orphan.
2174  * @osb: ocfs2 file system
2175  * @ret_orphan_dir: Orphan dir inode - returned locked!
2176  * @blkno: Actual block number of the inode to be inserted into orphan dir.
2177  * @lookup: dir lookup result, to be passed back into functions like
2178  *          ocfs2_orphan_add
2179  *
2180  * Returns zero on success and the ret_orphan_dir, name and lookup
2181  * fields will be populated.
2182  *
2183  * Returns non-zero on failure.
2184  */
2185 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2186                                     struct inode **ret_orphan_dir,
2187                                     u64 blkno,
2188                                     char *name,
2189                                     struct ocfs2_dir_lookup_result *lookup,
2190                                     bool dio)
2191 {
2192         struct inode *orphan_dir_inode = NULL;
2193         struct buffer_head *orphan_dir_bh = NULL;
2194         int ret = 0;
2195
2196         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2197                                            &orphan_dir_bh);
2198         if (ret < 0) {
2199                 mlog_errno(ret);
2200                 return ret;
2201         }
2202
2203         ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2204                                          blkno, name, lookup, dio);
2205         if (ret < 0) {
2206                 mlog_errno(ret);
2207                 goto out;
2208         }
2209
2210         *ret_orphan_dir = orphan_dir_inode;
2211
2212 out:
2213         brelse(orphan_dir_bh);
2214
2215         if (ret) {
2216                 ocfs2_inode_unlock(orphan_dir_inode, 1);
2217                 inode_unlock(orphan_dir_inode);
2218                 iput(orphan_dir_inode);
2219         }
2220
2221         if (ret)
2222                 mlog_errno(ret);
2223         return ret;
2224 }
2225
2226 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2227                             handle_t *handle,
2228                             struct inode *inode,
2229                             struct buffer_head *fe_bh,
2230                             char *name,
2231                             struct ocfs2_dir_lookup_result *lookup,
2232                             struct inode *orphan_dir_inode,
2233                             bool dio)
2234 {
2235         struct buffer_head *orphan_dir_bh = NULL;
2236         int status = 0;
2237         struct ocfs2_dinode *orphan_fe;
2238         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2239         int namelen = dio ?
2240                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2241                         OCFS2_ORPHAN_NAMELEN;
2242
2243         trace_ocfs2_orphan_add_begin(
2244                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2245
2246         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2247         if (status < 0) {
2248                 mlog_errno(status);
2249                 goto leave;
2250         }
2251
2252         status = ocfs2_journal_access_di(handle,
2253                                          INODE_CACHE(orphan_dir_inode),
2254                                          orphan_dir_bh,
2255                                          OCFS2_JOURNAL_ACCESS_WRITE);
2256         if (status < 0) {
2257                 mlog_errno(status);
2258                 goto leave;
2259         }
2260
2261         /*
2262          * We're going to journal the change of i_flags and i_orphaned_slot.
2263          * It's safe anyway, though some callers may duplicate the journaling.
2264          * Journaling within the func just make the logic look more
2265          * straightforward.
2266          */
2267         status = ocfs2_journal_access_di(handle,
2268                                          INODE_CACHE(inode),
2269                                          fe_bh,
2270                                          OCFS2_JOURNAL_ACCESS_WRITE);
2271         if (status < 0) {
2272                 mlog_errno(status);
2273                 goto leave;
2274         }
2275
2276         /* we're a cluster, and nlink can change on disk from
2277          * underneath us... */
2278         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2279         if (S_ISDIR(inode->i_mode))
2280                 ocfs2_add_links_count(orphan_fe, 1);
2281         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2282         ocfs2_journal_dirty(handle, orphan_dir_bh);
2283
2284         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2285                                    namelen, inode,
2286                                    OCFS2_I(inode)->ip_blkno,
2287                                    orphan_dir_bh, lookup);
2288         if (status < 0) {
2289                 mlog_errno(status);
2290                 goto rollback;
2291         }
2292
2293         if (dio) {
2294                 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2295                  * slot.
2296                  */
2297                 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2298                 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2299         } else {
2300                 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2301                 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2302
2303                 /* Record which orphan dir our inode now resides
2304                  * in. delete_inode will use this to determine which orphan
2305                  * dir to lock. */
2306                 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2307         }
2308
2309         ocfs2_journal_dirty(handle, fe_bh);
2310
2311         trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2312                                    osb->slot_num);
2313
2314 rollback:
2315         if (status < 0) {
2316                 if (S_ISDIR(inode->i_mode))
2317                         ocfs2_add_links_count(orphan_fe, -1);
2318                 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2319         }
2320
2321 leave:
2322         brelse(orphan_dir_bh);
2323
2324         return status;
2325 }
2326
2327 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2328 int ocfs2_orphan_del(struct ocfs2_super *osb,
2329                      handle_t *handle,
2330                      struct inode *orphan_dir_inode,
2331                      struct inode *inode,
2332                      struct buffer_head *orphan_dir_bh,
2333                      bool dio)
2334 {
2335         const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN;
2336         char name[namelen + 1];
2337         struct ocfs2_dinode *orphan_fe;
2338         int status = 0;
2339         struct ocfs2_dir_lookup_result lookup = { NULL, };
2340
2341         if (dio) {
2342                 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2343                                 OCFS2_DIO_ORPHAN_PREFIX);
2344                 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2345                         status = -EINVAL;
2346                         mlog_errno(status);
2347                         return status;
2348                 }
2349
2350                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2351                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2352         } else
2353                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2354         if (status < 0) {
2355                 mlog_errno(status);
2356                 goto leave;
2357         }
2358
2359         trace_ocfs2_orphan_del(
2360              (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2361              name, strlen(name));
2362
2363         status = ocfs2_journal_access_di(handle,
2364                                          INODE_CACHE(orphan_dir_inode),
2365                                          orphan_dir_bh,
2366                                          OCFS2_JOURNAL_ACCESS_WRITE);
2367         if (status < 0) {
2368                 mlog_errno(status);
2369                 goto leave;
2370         }
2371
2372         /* find it's spot in the orphan directory */
2373         status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2374                                   &lookup);
2375         if (status) {
2376                 mlog_errno(status);
2377                 goto leave;
2378         }
2379
2380         /* remove it from the orphan directory */
2381         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2382         if (status < 0) {
2383                 mlog_errno(status);
2384                 goto leave;
2385         }
2386
2387         /* do the i_nlink dance! :) */
2388         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2389         if (S_ISDIR(inode->i_mode))
2390                 ocfs2_add_links_count(orphan_fe, -1);
2391         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2392         ocfs2_journal_dirty(handle, orphan_dir_bh);
2393
2394 leave:
2395         ocfs2_free_dir_lookup_result(&lookup);
2396
2397         if (status)
2398                 mlog_errno(status);
2399         return status;
2400 }
2401
2402 /**
2403  * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2404  * allocated file. This is different from the typical 'add to orphan dir'
2405  * operation in that the inode does not yet exist. This is a problem because
2406  * the orphan dir stringifies the inode block number to come up with it's
2407  * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2408  * problem. This function works around it by calling deeper into the orphan
2409  * and suballoc code than other callers. Use this only by necessity.
2410  * @dir: The directory which this inode will ultimately wind up under - not the
2411  * orphan dir!
2412  * @dir_bh: buffer_head the @dir inode block
2413  * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2414  * with the string to be used for orphan dirent. Pass back to the orphan dir
2415  * code.
2416  * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2417  * dir code.
2418  * @ret_di_blkno: block number where the new inode will be allocated.
2419  * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2420  * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2421  *
2422  * Returns zero on success and the ret_orphan_dir, name and lookup
2423  * fields will be populated.
2424  *
2425  * Returns non-zero on failure.
2426  */
2427 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2428                                         struct buffer_head *dir_bh,
2429                                         char *orphan_name,
2430                                         struct inode **ret_orphan_dir,
2431                                         u64 *ret_di_blkno,
2432                                         struct ocfs2_dir_lookup_result *orphan_insert,
2433                                         struct ocfs2_alloc_context **ret_inode_ac)
2434 {
2435         int ret;
2436         u64 di_blkno;
2437         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2438         struct inode *orphan_dir = NULL;
2439         struct buffer_head *orphan_dir_bh = NULL;
2440         struct ocfs2_alloc_context *inode_ac = NULL;
2441
2442         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2443         if (ret < 0) {
2444                 mlog_errno(ret);
2445                 return ret;
2446         }
2447
2448         /* reserve an inode spot */
2449         ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2450         if (ret < 0) {
2451                 if (ret != -ENOSPC)
2452                         mlog_errno(ret);
2453                 goto out;
2454         }
2455
2456         ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2457                                        &di_blkno);
2458         if (ret) {
2459                 mlog_errno(ret);
2460                 goto out;
2461         }
2462
2463         ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2464                                          di_blkno, orphan_name, orphan_insert,
2465                                          false);
2466         if (ret < 0) {
2467                 mlog_errno(ret);
2468                 goto out;
2469         }
2470
2471 out:
2472         if (ret == 0) {
2473                 *ret_orphan_dir = orphan_dir;
2474                 *ret_di_blkno = di_blkno;
2475                 *ret_inode_ac = inode_ac;
2476                 /*
2477                  * orphan_name and orphan_insert are already up to
2478                  * date via prepare_orphan_dir
2479                  */
2480         } else {
2481                 /* Unroll reserve_new_inode* */
2482                 if (inode_ac)
2483                         ocfs2_free_alloc_context(inode_ac);
2484
2485                 /* Unroll orphan dir locking */
2486                 inode_unlock(orphan_dir);
2487                 ocfs2_inode_unlock(orphan_dir, 1);
2488                 iput(orphan_dir);
2489         }
2490
2491         brelse(orphan_dir_bh);
2492
2493         return ret;
2494 }
2495
2496 int ocfs2_create_inode_in_orphan(struct inode *dir,
2497                                  int mode,
2498                                  struct inode **new_inode)
2499 {
2500         int status, did_quota_inode = 0;
2501         struct inode *inode = NULL;
2502         struct inode *orphan_dir = NULL;
2503         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2504         struct ocfs2_dinode *di = NULL;
2505         handle_t *handle = NULL;
2506         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2507         struct buffer_head *parent_di_bh = NULL;
2508         struct buffer_head *new_di_bh = NULL;
2509         struct ocfs2_alloc_context *inode_ac = NULL;
2510         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2511         u64 uninitialized_var(di_blkno), suballoc_loc;
2512         u16 suballoc_bit;
2513
2514         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2515         if (status < 0) {
2516                 if (status != -ENOENT)
2517                         mlog_errno(status);
2518                 return status;
2519         }
2520
2521         status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2522                                               orphan_name, &orphan_dir,
2523                                               &di_blkno, &orphan_insert, &inode_ac);
2524         if (status < 0) {
2525                 if (status != -ENOSPC)
2526                         mlog_errno(status);
2527                 goto leave;
2528         }
2529
2530         inode = ocfs2_get_init_inode(dir, mode);
2531         if (IS_ERR(inode)) {
2532                 status = PTR_ERR(inode);
2533                 inode = NULL;
2534                 mlog_errno(status);
2535                 goto leave;
2536         }
2537
2538         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2539         if (IS_ERR(handle)) {
2540                 status = PTR_ERR(handle);
2541                 handle = NULL;
2542                 mlog_errno(status);
2543                 goto leave;
2544         }
2545
2546         status = dquot_alloc_inode(inode);
2547         if (status)
2548                 goto leave;
2549         did_quota_inode = 1;
2550
2551         status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2552                                               &suballoc_loc,
2553                                               &suballoc_bit, di_blkno);
2554         if (status < 0) {
2555                 mlog_errno(status);
2556                 goto leave;
2557         }
2558
2559         clear_nlink(inode);
2560         /* do the real work now. */
2561         status = __ocfs2_mknod_locked(dir, inode,
2562                                       0, &new_di_bh, parent_di_bh, handle,
2563                                       inode_ac, di_blkno, suballoc_loc,
2564                                       suballoc_bit);
2565         if (status < 0) {
2566                 mlog_errno(status);
2567                 goto leave;
2568         }
2569
2570         di = (struct ocfs2_dinode *)new_di_bh->b_data;
2571         status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2572                                   &orphan_insert, orphan_dir, false);
2573         if (status < 0) {
2574                 mlog_errno(status);
2575                 goto leave;
2576         }
2577
2578         /* get open lock so that only nodes can't remove it from orphan dir. */
2579         status = ocfs2_open_lock(inode);
2580         if (status < 0)
2581                 mlog_errno(status);
2582
2583         insert_inode_hash(inode);
2584 leave:
2585         if (status < 0 && did_quota_inode)
2586                 dquot_free_inode(inode);
2587         if (handle)
2588                 ocfs2_commit_trans(osb, handle);
2589
2590         if (orphan_dir) {
2591                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2592                 ocfs2_inode_unlock(orphan_dir, 1);
2593                 inode_unlock(orphan_dir);
2594                 iput(orphan_dir);
2595         }
2596
2597         if ((status < 0) && inode) {
2598                 clear_nlink(inode);
2599                 iput(inode);
2600         }
2601
2602         if (inode_ac)
2603                 ocfs2_free_alloc_context(inode_ac);
2604
2605         brelse(new_di_bh);
2606
2607         if (!status)
2608                 *new_inode = inode;
2609
2610         ocfs2_free_dir_lookup_result(&orphan_insert);
2611
2612         ocfs2_inode_unlock(dir, 1);
2613         brelse(parent_di_bh);
2614         return status;
2615 }
2616
2617 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2618         struct inode *inode)
2619 {
2620         char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2621         struct inode *orphan_dir_inode = NULL;
2622         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2623         struct buffer_head *di_bh = NULL;
2624         int status = 0;
2625         handle_t *handle = NULL;
2626         struct ocfs2_dinode *di = NULL;
2627
2628         status = ocfs2_inode_lock(inode, &di_bh, 1);
2629         if (status < 0) {
2630                 mlog_errno(status);
2631                 goto bail;
2632         }
2633
2634         di = (struct ocfs2_dinode *) di_bh->b_data;
2635         /*
2636          * Another append dio crashed?
2637          * If so, manually recover it first.
2638          */
2639         if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2640                 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2641                 if (status < 0) {
2642                         if (status != -ENOSPC)
2643                                 mlog_errno(status);
2644                         goto bail_unlock_inode;
2645                 }
2646
2647                 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2648                 if (status < 0) {
2649                         mlog_errno(status);
2650                         goto bail_unlock_inode;
2651                 }
2652         }
2653
2654         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2655                         OCFS2_I(inode)->ip_blkno,
2656                         orphan_name,
2657                         &orphan_insert,
2658                         true);
2659         if (status < 0) {
2660                 mlog_errno(status);
2661                 goto bail_unlock_inode;
2662         }
2663
2664         handle = ocfs2_start_trans(osb,
2665                         OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2666         if (IS_ERR(handle)) {
2667                 status = PTR_ERR(handle);
2668                 goto bail_unlock_orphan;
2669         }
2670
2671         status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2672                         &orphan_insert, orphan_dir_inode, true);
2673         if (status)
2674                 mlog_errno(status);
2675
2676         ocfs2_commit_trans(osb, handle);
2677
2678 bail_unlock_orphan:
2679         ocfs2_inode_unlock(orphan_dir_inode, 1);
2680         inode_unlock(orphan_dir_inode);
2681         iput(orphan_dir_inode);
2682
2683         ocfs2_free_dir_lookup_result(&orphan_insert);
2684
2685 bail_unlock_inode:
2686         ocfs2_inode_unlock(inode, 1);
2687         brelse(di_bh);
2688
2689 bail:
2690         return status;
2691 }
2692
2693 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2694                 struct inode *inode, struct buffer_head *di_bh,
2695                 int update_isize, loff_t end)
2696 {
2697         struct inode *orphan_dir_inode = NULL;
2698         struct buffer_head *orphan_dir_bh = NULL;
2699         struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2700         handle_t *handle = NULL;
2701         int status = 0;
2702
2703         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2704                         ORPHAN_DIR_SYSTEM_INODE,
2705                         le16_to_cpu(di->i_dio_orphaned_slot));
2706         if (!orphan_dir_inode) {
2707                 status = -ENOENT;
2708                 mlog_errno(status);
2709                 goto bail;
2710         }
2711
2712         inode_lock(orphan_dir_inode);
2713         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2714         if (status < 0) {
2715                 inode_unlock(orphan_dir_inode);
2716                 iput(orphan_dir_inode);
2717                 mlog_errno(status);
2718                 goto bail;
2719         }
2720
2721         handle = ocfs2_start_trans(osb,
2722                         OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2723         if (IS_ERR(handle)) {
2724                 status = PTR_ERR(handle);
2725                 goto bail_unlock_orphan;
2726         }
2727
2728         BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2729
2730         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2731                                 inode, orphan_dir_bh, true);
2732         if (status < 0) {
2733                 mlog_errno(status);
2734                 goto bail_commit;
2735         }
2736
2737         status = ocfs2_journal_access_di(handle,
2738                         INODE_CACHE(inode),
2739                         di_bh,
2740                         OCFS2_JOURNAL_ACCESS_WRITE);
2741         if (status < 0) {
2742                 mlog_errno(status);
2743                 goto bail_commit;
2744         }
2745
2746         di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2747         di->i_dio_orphaned_slot = 0;
2748
2749         if (update_isize) {
2750                 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2751                 if (status)
2752                         mlog_errno(status);
2753         } else
2754                 ocfs2_journal_dirty(handle, di_bh);
2755
2756 bail_commit:
2757         ocfs2_commit_trans(osb, handle);
2758
2759 bail_unlock_orphan:
2760         ocfs2_inode_unlock(orphan_dir_inode, 1);
2761         inode_unlock(orphan_dir_inode);
2762         brelse(orphan_dir_bh);
2763         iput(orphan_dir_inode);
2764
2765 bail:
2766         return status;
2767 }
2768
2769 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2770                                    struct inode *inode,
2771                                    struct dentry *dentry)
2772 {
2773         int status = 0;
2774         struct buffer_head *parent_di_bh = NULL;
2775         handle_t *handle = NULL;
2776         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2777         struct ocfs2_dinode *dir_di, *di;
2778         struct inode *orphan_dir_inode = NULL;
2779         struct buffer_head *orphan_dir_bh = NULL;
2780         struct buffer_head *di_bh = NULL;
2781         struct ocfs2_dir_lookup_result lookup = { NULL, };
2782
2783         trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2784                                 dentry->d_name.len, dentry->d_name.name,
2785                                 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2786                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2787
2788         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2789         if (status < 0) {
2790                 if (status != -ENOENT)
2791                         mlog_errno(status);
2792                 return status;
2793         }
2794
2795         dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2796         if (!dir_di->i_links_count) {
2797                 /* can't make a file in a deleted directory. */
2798                 status = -ENOENT;
2799                 goto leave;
2800         }
2801
2802         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2803                                            dentry->d_name.len);
2804         if (status)
2805                 goto leave;
2806
2807         /* get a spot inside the dir. */
2808         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2809                                               dentry->d_name.name,
2810                                               dentry->d_name.len, &lookup);
2811         if (status < 0) {
2812                 mlog_errno(status);
2813                 goto leave;
2814         }
2815
2816         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2817                                                        ORPHAN_DIR_SYSTEM_INODE,
2818                                                        osb->slot_num);
2819         if (!orphan_dir_inode) {
2820                 status = -ENOENT;
2821                 mlog_errno(status);
2822                 goto leave;
2823         }
2824
2825         inode_lock(orphan_dir_inode);
2826
2827         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2828         if (status < 0) {
2829                 mlog_errno(status);
2830                 inode_unlock(orphan_dir_inode);
2831                 iput(orphan_dir_inode);
2832                 goto leave;
2833         }
2834
2835         status = ocfs2_read_inode_block(inode, &di_bh);
2836         if (status < 0) {
2837                 mlog_errno(status);
2838                 goto orphan_unlock;
2839         }
2840
2841         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2842         if (IS_ERR(handle)) {
2843                 status = PTR_ERR(handle);
2844                 handle = NULL;
2845                 mlog_errno(status);
2846                 goto orphan_unlock;
2847         }
2848
2849         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2850                                          di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2851         if (status < 0) {
2852                 mlog_errno(status);
2853                 goto out_commit;
2854         }
2855
2856         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2857                                   orphan_dir_bh, false);
2858         if (status < 0) {
2859                 mlog_errno(status);
2860                 goto out_commit;
2861         }
2862
2863         di = (struct ocfs2_dinode *)di_bh->b_data;
2864         di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2865         di->i_orphaned_slot = 0;
2866         set_nlink(inode, 1);
2867         ocfs2_set_links_count(di, inode->i_nlink);
2868         ocfs2_update_inode_fsync_trans(handle, inode, 1);
2869         ocfs2_journal_dirty(handle, di_bh);
2870
2871         status = ocfs2_add_entry(handle, dentry, inode,
2872                                  OCFS2_I(inode)->ip_blkno, parent_di_bh,
2873                                  &lookup);
2874         if (status < 0) {
2875                 mlog_errno(status);
2876                 goto out_commit;
2877         }
2878
2879         status = ocfs2_dentry_attach_lock(dentry, inode,
2880                                           OCFS2_I(dir)->ip_blkno);
2881         if (status) {
2882                 mlog_errno(status);
2883                 goto out_commit;
2884         }
2885
2886         d_instantiate(dentry, inode);
2887         status = 0;
2888 out_commit:
2889         ocfs2_commit_trans(osb, handle);
2890 orphan_unlock:
2891         ocfs2_inode_unlock(orphan_dir_inode, 1);
2892         inode_unlock(orphan_dir_inode);
2893         iput(orphan_dir_inode);
2894 leave:
2895
2896         ocfs2_inode_unlock(dir, 1);
2897
2898         brelse(di_bh);
2899         brelse(parent_di_bh);
2900         brelse(orphan_dir_bh);
2901
2902         ocfs2_free_dir_lookup_result(&lookup);
2903
2904         if (status)
2905                 mlog_errno(status);
2906
2907         return status;
2908 }
2909
2910 const struct inode_operations ocfs2_dir_iops = {
2911         .create         = ocfs2_create,
2912         .lookup         = ocfs2_lookup,
2913         .link           = ocfs2_link,
2914         .unlink         = ocfs2_unlink,
2915         .rmdir          = ocfs2_unlink,
2916         .symlink        = ocfs2_symlink,
2917         .mkdir          = ocfs2_mkdir,
2918         .mknod          = ocfs2_mknod,
2919         .rename         = ocfs2_rename,
2920         .setattr        = ocfs2_setattr,
2921         .getattr        = ocfs2_getattr,
2922         .permission     = ocfs2_permission,
2923         .listxattr      = ocfs2_listxattr,
2924         .fiemap         = ocfs2_fiemap,
2925         .get_acl        = ocfs2_iop_get_acl,
2926         .set_acl        = ocfs2_iop_set_acl,
2927 };