fs/ocfs2/namei.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* -*- mode: c; c-basic-offset: 8; -*-
   3  * vim: noexpandtab sw=8 ts=8 sts=0:
   4  *
   5  * namei.c
   6  *
   7  * Create and rename file, directory, symlinks
   8  *
   9  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
  10  *
  11  *  Portions of this code from linux/fs/ext3/dir.c
  12  *
  13  *  Copyright (C) 1992, 1993, 1994, 1995
  14  *  Remy Card ([email protected])
  15  *  Laboratoire MASI - Institut Blaise pascal
  16  *  Universite Pierre et Marie Curie (Paris VI)
  17  *
  18  *   from
  19  *
  20  *   linux/fs/minix/dir.c
  21  *
  22  *   Copyright (C) 1991, 1992 Linux Torvalds
  23  */
  24
  25 #include <linux/fs.h>
  26 #include <linux/types.h>
  27 #include <linux/slab.h>
  28 #include <linux/highmem.h>
  29 #include <linux/quotaops.h>
  30 #include <linux/iversion.h>
  31
  32 #include <cluster/masklog.h>
  33
  34 #include "ocfs2.h"
  35
  36 #include "alloc.h"
  37 #include "dcache.h"
  38 #include "dir.h"
  39 #include "dlmglue.h"
  40 #include "extent_map.h"
  41 #include "file.h"
  42 #include "inode.h"
  43 #include "journal.h"
  44 #include "namei.h"
  45 #include "suballoc.h"
  46 #include "super.h"
  47 #include "symlink.h"
  48 #include "sysfile.h"
  49 #include "uptodate.h"
  50 #include "xattr.h"
  51 #include "acl.h"
  52 #include "ocfs2_trace.h"
  53
  54 #include "buffer_head_io.h"
  55
  56 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
  57                               struct inode *dir,
  58                               struct inode *inode,
  59                               dev_t dev,
  60                               struct buffer_head **new_fe_bh,
  61                               struct buffer_head *parent_fe_bh,
  62                               handle_t *handle,
  63                               struct ocfs2_alloc_context *inode_ac);
  64
  65 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
  66                                     struct inode **ret_orphan_dir,
  67                                     u64 blkno,
  68                                     char *name,
  69                                     struct ocfs2_dir_lookup_result *lookup,
  70                                     bool dio);
  71
  72 static int ocfs2_orphan_add(struct ocfs2_super *osb,
  73                             handle_t *handle,
  74                             struct inode *inode,
  75                             struct buffer_head *fe_bh,
  76                             char *name,
  77                             struct ocfs2_dir_lookup_result *lookup,
  78                             struct inode *orphan_dir_inode,
  79                             bool dio);
  80
  81 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
  82                                      handle_t *handle,
  83                                      struct inode *inode,
  84                                      const char *symname);
  85
  86 static int ocfs2_double_lock(struct ocfs2_super *osb,
  87                              struct buffer_head **bh1,
  88                              struct inode *inode1,
  89                              struct buffer_head **bh2,
  90                              struct inode *inode2,
  91                              int rename);
  92
  93 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
  94 /* An orphan dir name is an 8 byte value, printed as a hex string */
  95 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
  96
  97 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
  98                                    unsigned int flags)
  99 {
 100         int status;
 101         u64 blkno;
 102         struct inode *inode = NULL;
 103         struct dentry *ret;
 104         struct ocfs2_inode_info *oi;
 105
 106         trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
 107                            dentry->d_name.name,
 108                            (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
 109
 110         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
 111                 ret = ERR_PTR(-ENAMETOOLONG);
 112                 goto bail;
 113         }
 114
 115         status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
 116         if (status < 0) {
 117                 if (status != -ENOENT)
 118                         mlog_errno(status);
 119                 ret = ERR_PTR(status);
 120                 goto bail;
 121         }
 122
 123         status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
 124                                             dentry->d_name.len, &blkno);
 125         if (status < 0)
 126                 goto bail_add;
 127
 128         inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
 129         if (IS_ERR(inode)) {
 130                 ret = ERR_PTR(-EACCES);
 131                 goto bail_unlock;
 132         }
 133
 134         oi = OCFS2_I(inode);
 135         /* Clear any orphaned state... If we were able to look up the
 136          * inode from a directory, it certainly can't be orphaned. We
 137          * might have the bad state from a node which intended to
 138          * orphan this inode but crashed before it could commit the
 139          * unlink. */
 140         spin_lock(&oi->ip_lock);
 141         oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
 142         spin_unlock(&oi->ip_lock);
 143
 144 bail_add:
 145         ret = d_splice_alias(inode, dentry);
 146
 147         if (inode) {
 148                 /*
 149                  * If d_splice_alias() finds a DCACHE_DISCONNECTED
 150                  * dentry, it will d_move() it on top of ourse. The
 151                  * return value will indicate this however, so in
 152                  * those cases, we switch them around for the locking
 153                  * code.
 154                  *
 155                  * NOTE: This dentry already has ->d_op set from
 156                  * ocfs2_get_parent() and ocfs2_get_dentry()
 157                  */
 158                 if (!IS_ERR_OR_NULL(ret))
 159                         dentry = ret;
 160
 161                 status = ocfs2_dentry_attach_lock(dentry, inode,
 162                                                   OCFS2_I(dir)->ip_blkno);
 163                 if (status) {
 164                         mlog_errno(status);
 165                         ret = ERR_PTR(status);
 166                         goto bail_unlock;
 167                 }
 168         } else
 169                 ocfs2_dentry_attach_gen(dentry);
 170
 171 bail_unlock:
 172         /* Don't drop the cluster lock until *after* the d_add --
 173          * unlink on another node will message us to remove that
 174          * dentry under this lock so otherwise we can race this with
 175          * the downconvert thread and have a stale dentry. */
 176         ocfs2_inode_unlock(dir, 0);
 177
 178 bail:
 179
 180         trace_ocfs2_lookup_ret(ret);
 181
 182         return ret;
 183 }
 184
 185 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
 186 {
 187         struct inode *inode;
 188         int status;
 189
 190         inode = new_inode(dir->i_sb);
 191         if (!inode) {
 192                 mlog(ML_ERROR, "new_inode failed!\n");
 193                 return ERR_PTR(-ENOMEM);
 194         }
 195
 196         /* populate as many fields early on as possible - many of
 197          * these are used by the support functions here and in
 198          * callers. */
 199         if (S_ISDIR(mode))
 200                 set_nlink(inode, 2);
 201         inode_init_owner(inode, dir, mode);
 202         status = dquot_initialize(inode);
 203         if (status)
 204                 return ERR_PTR(status);
 205
 206         return inode;
 207 }
 208
 209 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
 210                 struct dentry *dentry, struct inode *inode)
 211 {
 212         struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
 213
 214         ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
 215         ocfs2_lock_res_free(&dl->dl_lockres);
 216         BUG_ON(dl->dl_count != 1);
 217         spin_lock(&dentry_attach_lock);
 218         dentry->d_fsdata = NULL;
 219         spin_unlock(&dentry_attach_lock);
 220         kfree(dl);
 221         iput(inode);
 222 }
 223
 224 static int ocfs2_mknod(struct inode *dir,
 225                        struct dentry *dentry,
 226                        umode_t mode,
 227                        dev_t dev)
 228 {
 229         int status = 0;
 230         struct buffer_head *parent_fe_bh = NULL;
 231         handle_t *handle = NULL;
 232         struct ocfs2_super *osb;
 233         struct ocfs2_dinode *dirfe;
 234         struct buffer_head *new_fe_bh = NULL;
 235         struct inode *inode = NULL;
 236         struct ocfs2_alloc_context *inode_ac = NULL;
 237         struct ocfs2_alloc_context *data_ac = NULL;
 238         struct ocfs2_alloc_context *meta_ac = NULL;
 239         int want_clusters = 0;
 240         int want_meta = 0;
 241         int xattr_credits = 0;
 242         struct ocfs2_security_xattr_info si = {
 243                 .enable = 1,
 244         };
 245         int did_quota_inode = 0;
 246         struct ocfs2_dir_lookup_result lookup = { NULL, };
 247         sigset_t oldset;
 248         int did_block_signals = 0;
 249         struct ocfs2_dentry_lock *dl = NULL;
 250
 251         trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 252                           (unsigned long long)OCFS2_I(dir)->ip_blkno,
 253                           (unsigned long)dev, mode);
 254
 255         status = dquot_initialize(dir);
 256         if (status) {
 257                 mlog_errno(status);
 258                 return status;
 259         }
 260
 261         /* get our super block */
 262         osb = OCFS2_SB(dir->i_sb);
 263
 264         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
 265         if (status < 0) {
 266                 if (status != -ENOENT)
 267                         mlog_errno(status);
 268                 return status;
 269         }
 270
 271         if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
 272                 status = -EMLINK;
 273                 goto leave;
 274         }
 275
 276         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
 277         if (!ocfs2_read_links_count(dirfe)) {
 278                 /* can't make a file in a deleted directory. */
 279                 status = -ENOENT;
 280                 goto leave;
 281         }
 282
 283         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 284                                            dentry->d_name.len);
 285         if (status)
 286                 goto leave;
 287
 288         /* get a spot inside the dir. */
 289         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 290                                               dentry->d_name.name,
 291                                               dentry->d_name.len, &lookup);
 292         if (status < 0) {
 293                 mlog_errno(status);
 294                 goto leave;
 295         }
 296
 297         /* reserve an inode spot */
 298         status = ocfs2_reserve_new_inode(osb, &inode_ac);
 299         if (status < 0) {
 300                 if (status != -ENOSPC)
 301                         mlog_errno(status);
 302                 goto leave;
 303         }
 304
 305         inode = ocfs2_get_init_inode(dir, mode);
 306         if (IS_ERR(inode)) {
 307                 status = PTR_ERR(inode);
 308                 inode = NULL;
 309                 mlog_errno(status);
 310                 goto leave;
 311         }
 312
 313         /* get security xattr */
 314         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
 315         if (status) {
 316                 if (status == -EOPNOTSUPP)
 317                         si.enable = 0;
 318                 else {
 319                         mlog_errno(status);
 320                         goto leave;
 321                 }
 322         }
 323
 324         /* calculate meta data/clusters for setting security and acl xattr */
 325         status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
 326                                        &si, &want_clusters,
 327                                        &xattr_credits, &want_meta);
 328         if (status < 0) {
 329                 mlog_errno(status);
 330                 goto leave;
 331         }
 332
 333         /* Reserve a cluster if creating an extent based directory. */
 334         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
 335                 want_clusters += 1;
 336
 337                 /* Dir indexing requires extra space as well */
 338                 if (ocfs2_supports_indexed_dirs(osb))
 339                         want_meta++;
 340         }
 341
 342         status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
 343         if (status < 0) {
 344                 if (status != -ENOSPC)
 345                         mlog_errno(status);
 346                 goto leave;
 347         }
 348
 349         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
 350         if (status < 0) {
 351                 if (status != -ENOSPC)
 352                         mlog_errno(status);
 353                 goto leave;
 354         }
 355
 356         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
 357                                                             S_ISDIR(mode),
 358                                                             xattr_credits));
 359         if (IS_ERR(handle)) {
 360                 status = PTR_ERR(handle);
 361                 handle = NULL;
 362                 mlog_errno(status);
 363                 goto leave;
 364         }
 365
 366         /* Starting to change things, restart is no longer possible. */
 367         ocfs2_block_signals(&oldset);
 368         did_block_signals = 1;
 369
 370         status = dquot_alloc_inode(inode);
 371         if (status)
 372                 goto leave;
 373         did_quota_inode = 1;
 374
 375         /* do the real work now. */
 376         status = ocfs2_mknod_locked(osb, dir, inode, dev,
 377                                     &new_fe_bh, parent_fe_bh, handle,
 378                                     inode_ac);
 379         if (status < 0) {
 380                 mlog_errno(status);
 381                 goto leave;
 382         }
 383
 384         if (S_ISDIR(mode)) {
 385                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
 386                                             new_fe_bh, data_ac, meta_ac);
 387                 if (status < 0) {
 388                         mlog_errno(status);
 389                         goto leave;
 390                 }
 391
 392                 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
 393                                                  parent_fe_bh,
 394                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 395                 if (status < 0) {
 396                         mlog_errno(status);
 397                         goto leave;
 398                 }
 399                 ocfs2_add_links_count(dirfe, 1);
 400                 ocfs2_journal_dirty(handle, parent_fe_bh);
 401                 inc_nlink(dir);
 402         }
 403
 404         status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
 405                          meta_ac, data_ac);
 406
 407         if (status < 0) {
 408                 mlog_errno(status);
 409                 goto leave;
 410         }
 411
 412         if (si.enable) {
 413                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
 414                                                  meta_ac, data_ac);
 415                 if (status < 0) {
 416                         mlog_errno(status);
 417                         goto leave;
 418                 }
 419         }
 420
 421         /*
 422          * Do this before adding the entry to the directory. We add
 423          * also set d_op after success so that ->d_iput() will cleanup
 424          * the dentry lock even if ocfs2_add_entry() fails below.
 425          */
 426         status = ocfs2_dentry_attach_lock(dentry, inode,
 427                                           OCFS2_I(dir)->ip_blkno);
 428         if (status) {
 429                 mlog_errno(status);
 430                 goto leave;
 431         }
 432
 433         dl = dentry->d_fsdata;
 434
 435         status = ocfs2_add_entry(handle, dentry, inode,
 436                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
 437                                  &lookup);
 438         if (status < 0) {
 439                 mlog_errno(status);
 440                 goto leave;
 441         }
 442
 443         insert_inode_hash(inode);
 444         d_instantiate(dentry, inode);
 445         status = 0;
 446 leave:
 447         if (status < 0 && did_quota_inode)
 448                 dquot_free_inode(inode);
 449         if (handle)
 450                 ocfs2_commit_trans(osb, handle);
 451
 452         ocfs2_inode_unlock(dir, 1);
 453         if (did_block_signals)
 454                 ocfs2_unblock_signals(&oldset);
 455
 456         brelse(new_fe_bh);
 457         brelse(parent_fe_bh);
 458         kfree(si.value);
 459
 460         ocfs2_free_dir_lookup_result(&lookup);
 461
 462         if (inode_ac)
 463                 ocfs2_free_alloc_context(inode_ac);
 464
 465         if (data_ac)
 466                 ocfs2_free_alloc_context(data_ac);
 467
 468         if (meta_ac)
 469                 ocfs2_free_alloc_context(meta_ac);
 470
 471         /*
 472          * We should call iput after the i_mutex of the bitmap been
 473          * unlocked in ocfs2_free_alloc_context, or the
 474          * ocfs2_delete_inode will mutex_lock again.
 475          */
 476         if ((status < 0) && inode) {
 477                 if (dl)
 478                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
 479
 480                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
 481                 clear_nlink(inode);
 482                 iput(inode);
 483         }
 484
 485         if (status)
 486                 mlog_errno(status);
 487
 488         return status;
 489 }
 490
 491 static int __ocfs2_mknod_locked(struct inode *dir,
 492                                 struct inode *inode,
 493                                 dev_t dev,
 494                                 struct buffer_head **new_fe_bh,
 495                                 struct buffer_head *parent_fe_bh,
 496                                 handle_t *handle,
 497                                 struct ocfs2_alloc_context *inode_ac,
 498                                 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
 499 {
 500         int status = 0;
 501         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 502         struct ocfs2_dinode *fe = NULL;
 503         struct ocfs2_extent_list *fel;
 504         u16 feat;
 505         struct ocfs2_inode_info *oi = OCFS2_I(inode);
 506         struct timespec64 ts;
 507
 508         *new_fe_bh = NULL;
 509
 510         /* populate as many fields early on as possible - many of
 511          * these are used by the support functions here and in
 512          * callers. */
 513         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
 514         oi->ip_blkno = fe_blkno;
 515         spin_lock(&osb->osb_lock);
 516         inode->i_generation = osb->s_next_generation++;
 517         spin_unlock(&osb->osb_lock);
 518
 519         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
 520         if (!*new_fe_bh) {
 521                 status = -ENOMEM;
 522                 mlog_errno(status);
 523                 goto leave;
 524         }
 525         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
 526
 527         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
 528                                          *new_fe_bh,
 529                                          OCFS2_JOURNAL_ACCESS_CREATE);
 530         if (status < 0) {
 531                 mlog_errno(status);
 532                 goto leave;
 533         }
 534
 535         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
 536         memset(fe, 0, osb->sb->s_blocksize);
 537
 538         fe->i_generation = cpu_to_le32(inode->i_generation);
 539         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
 540         fe->i_blkno = cpu_to_le64(fe_blkno);
 541         fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
 542         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
 543         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
 544         fe->i_uid = cpu_to_le32(i_uid_read(inode));
 545         fe->i_gid = cpu_to_le32(i_gid_read(inode));
 546         fe->i_mode = cpu_to_le16(inode->i_mode);
 547         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 548                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
 549
 550         ocfs2_set_links_count(fe, inode->i_nlink);
 551
 552         fe->i_last_eb_blk = 0;
 553         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 554         fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
 555         ktime_get_real_ts64(&ts);
 556         fe->i_atime = fe->i_ctime = fe->i_mtime =
 557                 cpu_to_le64(ts.tv_sec);
 558         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
 559                 cpu_to_le32(ts.tv_nsec);
 560         fe->i_dtime = 0;
 561
 562         /*
 563          * If supported, directories start with inline data. If inline
 564          * isn't supported, but indexing is, we start them as indexed.
 565          */
 566         feat = le16_to_cpu(fe->i_dyn_features);
 567         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
 568                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
 569
 570                 fe->id2.i_data.id_count = cpu_to_le16(
 571                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
 572         } else {
 573                 fel = &fe->id2.i_list;
 574                 fel->l_tree_depth = 0;
 575                 fel->l_next_free_rec = 0;
 576                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
 577         }
 578
 579         ocfs2_journal_dirty(handle, *new_fe_bh);
 580
 581         ocfs2_populate_inode(inode, fe, 1);
 582         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
 583         if (!ocfs2_mount_local(osb)) {
 584                 status = ocfs2_create_new_inode_locks(inode);
 585                 if (status < 0)
 586                         mlog_errno(status);
 587         }
 588
 589         oi->i_sync_tid = handle->h_transaction->t_tid;
 590         oi->i_datasync_tid = handle->h_transaction->t_tid;
 591
 592 leave:
 593         if (status < 0) {
 594                 if (*new_fe_bh) {
 595                         brelse(*new_fe_bh);
 596                         *new_fe_bh = NULL;
 597                 }
 598         }
 599
 600         if (status)
 601                 mlog_errno(status);
 602         return status;
 603 }
 604
 605 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 606                               struct inode *dir,
 607                               struct inode *inode,
 608                               dev_t dev,
 609                               struct buffer_head **new_fe_bh,
 610                               struct buffer_head *parent_fe_bh,
 611                               handle_t *handle,
 612                               struct ocfs2_alloc_context *inode_ac)
 613 {
 614         int status = 0;
 615         u64 suballoc_loc, fe_blkno = 0;
 616         u16 suballoc_bit;
 617
 618         *new_fe_bh = NULL;
 619
 620         status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
 621                                        inode_ac, &suballoc_loc,
 622                                        &suballoc_bit, &fe_blkno);
 623         if (status < 0) {
 624                 mlog_errno(status);
 625                 return status;
 626         }
 627
 628         status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
 629                                     parent_fe_bh, handle, inode_ac,
 630                                     fe_blkno, suballoc_loc, suballoc_bit);
 631         if (status < 0) {
 632                 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit);
 633                 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode,
 634                                 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1);
 635                 if (tmp)
 636                         mlog_errno(tmp);
 637         }
 638
 639         return status;
 640 }
 641
 642 static int ocfs2_mkdir(struct inode *dir,
 643                        struct dentry *dentry,
 644                        umode_t mode)
 645 {
 646         int ret;
 647
 648         trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 649                           OCFS2_I(dir)->ip_blkno, mode);
 650         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
 651         if (ret)
 652                 mlog_errno(ret);
 653
 654         return ret;
 655 }
 656
 657 static int ocfs2_create(struct inode *dir,
 658                         struct dentry *dentry,
 659                         umode_t mode,
 660                         bool excl)
 661 {
 662         int ret;
 663
 664         trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 665                            (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
 666         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
 667         if (ret)
 668                 mlog_errno(ret);
 669
 670         return ret;
 671 }
 672
 673 static int ocfs2_link(struct dentry *old_dentry,
 674                       struct inode *dir,
 675                       struct dentry *dentry)
 676 {
 677         handle_t *handle;
 678         struct inode *inode = d_inode(old_dentry);
 679         struct inode *old_dir = d_inode(old_dentry->d_parent);
 680         int err;
 681         struct buffer_head *fe_bh = NULL;
 682         struct buffer_head *old_dir_bh = NULL;
 683         struct buffer_head *parent_fe_bh = NULL;
 684         struct ocfs2_dinode *fe = NULL;
 685         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 686         struct ocfs2_dir_lookup_result lookup = { NULL, };
 687         sigset_t oldset;
 688         u64 old_de_ino;
 689
 690         trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
 691                          old_dentry->d_name.len, old_dentry->d_name.name,
 692                          dentry->d_name.len, dentry->d_name.name);
 693
 694         if (S_ISDIR(inode->i_mode))
 695                 return -EPERM;
 696
 697         err = dquot_initialize(dir);
 698         if (err) {
 699                 mlog_errno(err);
 700                 return err;
 701         }
 702
 703         err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
 704                         &parent_fe_bh, dir, 0);
 705         if (err < 0) {
 706                 if (err != -ENOENT)
 707                         mlog_errno(err);
 708                 return err;
 709         }
 710
 711         /* make sure both dirs have bhs
 712          * get an extra ref on old_dir_bh if old==new */
 713         if (!parent_fe_bh) {
 714                 if (old_dir_bh) {
 715                         parent_fe_bh = old_dir_bh;
 716                         get_bh(parent_fe_bh);
 717                 } else {
 718                         mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
 719                         err = -EIO;
 720                         goto out;
 721                 }
 722         }
 723
 724         if (!dir->i_nlink) {
 725                 err = -ENOENT;
 726                 goto out;
 727         }
 728
 729         err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
 730                         old_dentry->d_name.len, &old_de_ino);
 731         if (err) {
 732                 err = -ENOENT;
 733                 goto out;
 734         }
 735
 736         /*
 737          * Check whether another node removed the source inode while we
 738          * were in the vfs.
 739          */
 740         if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
 741                 err = -ENOENT;
 742                 goto out;
 743         }
 744
 745         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 746                                         dentry->d_name.len);
 747         if (err)
 748                 goto out;
 749
 750         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 751                                            dentry->d_name.name,
 752                                            dentry->d_name.len, &lookup);
 753         if (err < 0) {
 754                 mlog_errno(err);
 755                 goto out;
 756         }
 757
 758         err = ocfs2_inode_lock(inode, &fe_bh, 1);
 759         if (err < 0) {
 760                 if (err != -ENOENT)
 761                         mlog_errno(err);
 762                 goto out;
 763         }
 764
 765         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 766         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
 767                 err = -EMLINK;
 768                 goto out_unlock_inode;
 769         }
 770
 771         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
 772         if (IS_ERR(handle)) {
 773                 err = PTR_ERR(handle);
 774                 handle = NULL;
 775                 mlog_errno(err);
 776                 goto out_unlock_inode;
 777         }
 778
 779         /* Starting to change things, restart is no longer possible. */
 780         ocfs2_block_signals(&oldset);
 781
 782         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 783                                       OCFS2_JOURNAL_ACCESS_WRITE);
 784         if (err < 0) {
 785                 mlog_errno(err);
 786                 goto out_commit;
 787         }
 788
 789         inc_nlink(inode);
 790         inode->i_ctime = current_time(inode);
 791         ocfs2_set_links_count(fe, inode->i_nlink);
 792         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 793         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 794         ocfs2_journal_dirty(handle, fe_bh);
 795
 796         err = ocfs2_add_entry(handle, dentry, inode,
 797                               OCFS2_I(inode)->ip_blkno,
 798                               parent_fe_bh, &lookup);
 799         if (err) {
 800                 ocfs2_add_links_count(fe, -1);
 801                 drop_nlink(inode);
 802                 mlog_errno(err);
 803                 goto out_commit;
 804         }
 805
 806         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
 807         if (err) {
 808                 mlog_errno(err);
 809                 goto out_commit;
 810         }
 811
 812         ihold(inode);
 813         d_instantiate(dentry, inode);
 814
 815 out_commit:
 816         ocfs2_commit_trans(osb, handle);
 817         ocfs2_unblock_signals(&oldset);
 818 out_unlock_inode:
 819         ocfs2_inode_unlock(inode, 1);
 820
 821 out:
 822         ocfs2_double_unlock(old_dir, dir);
 823
 824         brelse(fe_bh);
 825         brelse(parent_fe_bh);
 826         brelse(old_dir_bh);
 827
 828         ocfs2_free_dir_lookup_result(&lookup);
 829
 830         if (err)
 831                 mlog_errno(err);
 832
 833         return err;
 834 }
 835
 836 /*
 837  * Takes and drops an exclusive lock on the given dentry. This will
 838  * force other nodes to drop it.
 839  */
 840 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 841 {
 842         int ret;
 843
 844         ret = ocfs2_dentry_lock(dentry, 1);
 845         if (ret)
 846                 mlog_errno(ret);
 847         else
 848                 ocfs2_dentry_unlock(dentry, 1);
 849
 850         return ret;
 851 }
 852
 853 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
 854 {
 855         if (S_ISDIR(inode->i_mode)) {
 856                 if (inode->i_nlink == 2)
 857                         return 1;
 858                 return 0;
 859         }
 860
 861         if (inode->i_nlink == 1)
 862                 return 1;
 863         return 0;
 864 }
 865
 866 static int ocfs2_unlink(struct inode *dir,
 867                         struct dentry *dentry)
 868 {
 869         int status;
 870         int child_locked = 0;
 871         bool is_unlinkable = false;
 872         struct inode *inode = d_inode(dentry);
 873         struct inode *orphan_dir = NULL;
 874         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 875         u64 blkno;
 876         struct ocfs2_dinode *fe = NULL;
 877         struct buffer_head *fe_bh = NULL;
 878         struct buffer_head *parent_node_bh = NULL;
 879         handle_t *handle = NULL;
 880         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 881         struct ocfs2_dir_lookup_result lookup = { NULL, };
 882         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
 883
 884         trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
 885                            dentry->d_name.name,
 886                            (unsigned long long)OCFS2_I(dir)->ip_blkno,
 887                            (unsigned long long)OCFS2_I(inode)->ip_blkno);
 888
 889         status = dquot_initialize(dir);
 890         if (status) {
 891                 mlog_errno(status);
 892                 return status;
 893         }
 894
 895         BUG_ON(d_inode(dentry->d_parent) != dir);
 896
 897         if (inode == osb->root_inode)
 898                 return -EPERM;
 899
 900         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
 901                                          OI_LS_PARENT);
 902         if (status < 0) {
 903                 if (status != -ENOENT)
 904                         mlog_errno(status);
 905                 return status;
 906         }
 907
 908         status = ocfs2_find_files_on_disk(dentry->d_name.name,
 909                                           dentry->d_name.len, &blkno, dir,
 910                                           &lookup);
 911         if (status < 0) {
 912                 if (status != -ENOENT)
 913                         mlog_errno(status);
 914                 goto leave;
 915         }
 916
 917         if (OCFS2_I(inode)->ip_blkno != blkno) {
 918                 status = -ENOENT;
 919
 920                 trace_ocfs2_unlink_noent(
 921                                 (unsigned long long)OCFS2_I(inode)->ip_blkno,
 922                                 (unsigned long long)blkno,
 923                                 OCFS2_I(inode)->ip_flags);
 924                 goto leave;
 925         }
 926
 927         status = ocfs2_inode_lock(inode, &fe_bh, 1);
 928         if (status < 0) {
 929                 if (status != -ENOENT)
 930                         mlog_errno(status);
 931                 goto leave;
 932         }
 933         child_locked = 1;
 934
 935         if (S_ISDIR(inode->i_mode)) {
 936                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
 937                         status = -ENOTEMPTY;
 938                         goto leave;
 939                 }
 940         }
 941
 942         status = ocfs2_remote_dentry_delete(dentry);
 943         if (status < 0) {
 944                 /* This remote delete should succeed under all normal
 945                  * circumstances. */
 946                 mlog_errno(status);
 947                 goto leave;
 948         }
 949
 950         if (ocfs2_inode_is_unlinkable(inode)) {
 951                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
 952                                                   OCFS2_I(inode)->ip_blkno,
 953                                                   orphan_name, &orphan_insert,
 954                                                   false);
 955                 if (status < 0) {
 956                         mlog_errno(status);
 957                         goto leave;
 958                 }
 959                 is_unlinkable = true;
 960         }
 961
 962         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
 963         if (IS_ERR(handle)) {
 964                 status = PTR_ERR(handle);
 965                 handle = NULL;
 966                 mlog_errno(status);
 967                 goto leave;
 968         }
 969
 970         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 971                                          OCFS2_JOURNAL_ACCESS_WRITE);
 972         if (status < 0) {
 973                 mlog_errno(status);
 974                 goto leave;
 975         }
 976
 977         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 978
 979         /* delete the name from the parent dir */
 980         status = ocfs2_delete_entry(handle, dir, &lookup);
 981         if (status < 0) {
 982                 mlog_errno(status);
 983                 goto leave;
 984         }
 985
 986         if (S_ISDIR(inode->i_mode))
 987                 drop_nlink(inode);
 988         drop_nlink(inode);
 989         ocfs2_set_links_count(fe, inode->i_nlink);
 990         ocfs2_journal_dirty(handle, fe_bh);
 991
 992         dir->i_ctime = dir->i_mtime = current_time(dir);
 993         if (S_ISDIR(inode->i_mode))
 994                 drop_nlink(dir);
 995
 996         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
 997         if (status < 0) {
 998                 mlog_errno(status);
 999                 if (S_ISDIR(inode->i_mode))
1000                         inc_nlink(dir);
1001                 goto leave;
1002         }
1003
1004         if (is_unlinkable) {
1005                 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1006                                 orphan_name, &orphan_insert, orphan_dir, false);
1007                 if (status < 0)
1008                         mlog_errno(status);
1009         }
1010
1011 leave:
1012         if (handle)
1013                 ocfs2_commit_trans(osb, handle);
1014
1015         if (orphan_dir) {
1016                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1017                 ocfs2_inode_unlock(orphan_dir, 1);
1018                 inode_unlock(orphan_dir);
1019                 iput(orphan_dir);
1020         }
1021
1022         if (child_locked)
1023                 ocfs2_inode_unlock(inode, 1);
1024
1025         ocfs2_inode_unlock(dir, 1);
1026
1027         brelse(fe_bh);
1028         brelse(parent_node_bh);
1029
1030         ocfs2_free_dir_lookup_result(&orphan_insert);
1031         ocfs2_free_dir_lookup_result(&lookup);
1032
1033         if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1034                 mlog_errno(status);
1035
1036         return status;
1037 }
1038
1039 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1040                 u64 src_inode_no, u64 dest_inode_no)
1041 {
1042         int ret = 0, i = 0;
1043         u64 parent_inode_no = 0;
1044         u64 child_inode_no = src_inode_no;
1045         struct inode *child_inode;
1046
1047 #define MAX_LOOKUP_TIMES 32
1048         while (1) {
1049                 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1050                 if (IS_ERR(child_inode)) {
1051                         ret = PTR_ERR(child_inode);
1052                         break;
1053                 }
1054
1055                 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1056                 if (ret < 0) {
1057                         iput(child_inode);
1058                         if (ret != -ENOENT)
1059                                 mlog_errno(ret);
1060                         break;
1061                 }
1062
1063                 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1064                                 &parent_inode_no);
1065                 ocfs2_inode_unlock(child_inode, 0);
1066                 iput(child_inode);
1067                 if (ret < 0) {
1068                         ret = -ENOENT;
1069                         break;
1070                 }
1071
1072                 if (parent_inode_no == dest_inode_no) {
1073                         ret = 1;
1074                         break;
1075                 }
1076
1077                 if (parent_inode_no == osb->root_inode->i_ino) {
1078                         ret = 0;
1079                         break;
1080                 }
1081
1082                 child_inode_no = parent_inode_no;
1083
1084                 if (++i >= MAX_LOOKUP_TIMES) {
1085                         mlog(ML_NOTICE, "max lookup times reached, filesystem "
1086                                         "may have nested directories, "
1087                                         "src inode: %llu, dest inode: %llu.\n",
1088                                         (unsigned long long)src_inode_no,
1089                                         (unsigned long long)dest_inode_no);
1090                         ret = 0;
1091                         break;
1092                 }
1093         }
1094
1095         return ret;
1096 }
1097
1098 /*
1099  * The only place this should be used is rename and link!
1100  * if they have the same id, then the 1st one is the only one locked.
1101  */
1102 static int ocfs2_double_lock(struct ocfs2_super *osb,
1103                              struct buffer_head **bh1,
1104                              struct inode *inode1,
1105                              struct buffer_head **bh2,
1106                              struct inode *inode2,
1107                              int rename)
1108 {
1109         int status;
1110         int inode1_is_ancestor, inode2_is_ancestor;
1111         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1112         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1113
1114         trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1115                                 (unsigned long long)oi2->ip_blkno);
1116
1117         if (*bh1)
1118                 *bh1 = NULL;
1119         if (*bh2)
1120                 *bh2 = NULL;
1121
1122         /* we always want to lock the one with the lower lockid first.
1123          * and if they are nested, we lock ancestor first */
1124         if (oi1->ip_blkno != oi2->ip_blkno) {
1125                 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1126                                 oi1->ip_blkno);
1127                 if (inode1_is_ancestor < 0) {
1128                         status = inode1_is_ancestor;
1129                         goto bail;
1130                 }
1131
1132                 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1133                                 oi2->ip_blkno);
1134                 if (inode2_is_ancestor < 0) {
1135                         status = inode2_is_ancestor;
1136                         goto bail;
1137                 }
1138
1139                 if ((inode1_is_ancestor == 1) ||
1140                                 (oi1->ip_blkno < oi2->ip_blkno &&
1141                                 inode2_is_ancestor == 0)) {
1142                         /* switch id1 and id2 around */
1143                         swap(bh2, bh1);
1144                         swap(inode2, inode1);
1145                 }
1146                 /* lock id2 */
1147                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1148                                 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1149                 if (status < 0) {
1150                         if (status != -ENOENT)
1151                                 mlog_errno(status);
1152                         goto bail;
1153                 }
1154         }
1155
1156         /* lock id1 */
1157         status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1158                         rename == 1 ?  OI_LS_RENAME2 : OI_LS_PARENT);
1159         if (status < 0) {
1160                 /*
1161                  * An error return must mean that no cluster locks
1162                  * were held on function exit.
1163                  */
1164                 if (oi1->ip_blkno != oi2->ip_blkno) {
1165                         ocfs2_inode_unlock(inode2, 1);
1166                         brelse(*bh2);
1167                         *bh2 = NULL;
1168                 }
1169
1170                 if (status != -ENOENT)
1171                         mlog_errno(status);
1172         }
1173
1174         trace_ocfs2_double_lock_end(
1175                         (unsigned long long)oi1->ip_blkno,
1176                         (unsigned long long)oi2->ip_blkno);
1177
1178 bail:
1179         if (status)
1180                 mlog_errno(status);
1181         return status;
1182 }
1183
1184 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1185 {
1186         ocfs2_inode_unlock(inode1, 1);
1187
1188         if (inode1 != inode2)
1189                 ocfs2_inode_unlock(inode2, 1);
1190 }
1191
1192 static int ocfs2_rename(struct inode *old_dir,
1193                         struct dentry *old_dentry,
1194                         struct inode *new_dir,
1195                         struct dentry *new_dentry,
1196                         unsigned int flags)
1197 {
1198         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1199         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1200         struct inode *old_inode = d_inode(old_dentry);
1201         struct inode *new_inode = d_inode(new_dentry);
1202         struct inode *orphan_dir = NULL;
1203         struct ocfs2_dinode *newfe = NULL;
1204         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1205         struct buffer_head *newfe_bh = NULL;
1206         struct buffer_head *old_inode_bh = NULL;
1207         struct ocfs2_super *osb = NULL;
1208         u64 newfe_blkno, old_de_ino;
1209         handle_t *handle = NULL;
1210         struct buffer_head *old_dir_bh = NULL;
1211         struct buffer_head *new_dir_bh = NULL;
1212         u32 old_dir_nlink = old_dir->i_nlink;
1213         struct ocfs2_dinode *old_di;
1214         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1215         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1216         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1217         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1218         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1219         bool should_add_orphan = false;
1220
1221         if (flags)
1222                 return -EINVAL;
1223
1224         /* At some point it might be nice to break this function up a
1225          * bit. */
1226
1227         trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1228                            old_dentry->d_name.len, old_dentry->d_name.name,
1229                            new_dentry->d_name.len, new_dentry->d_name.name);
1230
1231         status = dquot_initialize(old_dir);
1232         if (status) {
1233                 mlog_errno(status);
1234                 goto bail;
1235         }
1236         status = dquot_initialize(new_dir);
1237         if (status) {
1238                 mlog_errno(status);
1239                 goto bail;
1240         }
1241
1242         osb = OCFS2_SB(old_dir->i_sb);
1243
1244         if (new_inode) {
1245                 if (!igrab(new_inode))
1246                         BUG();
1247         }
1248
1249         /* Assume a directory hierarchy thusly:
1250          * a/b/c
1251          * a/d
1252          * a,b,c, and d are all directories.
1253          *
1254          * from cwd of 'a' on both nodes:
1255          * node1: mv b/c d
1256          * node2: mv d   b/c
1257          *
1258          * And that's why, just like the VFS, we need a file system
1259          * rename lock. */
1260         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1261                 status = ocfs2_rename_lock(osb);
1262                 if (status < 0) {
1263                         mlog_errno(status);
1264                         goto bail;
1265                 }
1266                 rename_lock = 1;
1267
1268                 /* here we cannot guarantee the inodes haven't just been
1269                  * changed, so check if they are nested again */
1270                 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1271                                 old_inode->i_ino);
1272                 if (status < 0) {
1273                         mlog_errno(status);
1274                         goto bail;
1275                 } else if (status == 1) {
1276                         status = -EPERM;
1277                         trace_ocfs2_rename_not_permitted(
1278                                         (unsigned long long)old_inode->i_ino,
1279                                         (unsigned long long)new_dir->i_ino);
1280                         goto bail;
1281                 }
1282         }
1283
1284         /* if old and new are the same, this'll just do one lock. */
1285         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1286                                    &new_dir_bh, new_dir, 1);
1287         if (status < 0) {
1288                 mlog_errno(status);
1289                 goto bail;
1290         }
1291         parents_locked = 1;
1292
1293         if (!new_dir->i_nlink) {
1294                 status = -EACCES;
1295                 goto bail;
1296         }
1297
1298         /* make sure both dirs have bhs
1299          * get an extra ref on old_dir_bh if old==new */
1300         if (!new_dir_bh) {
1301                 if (old_dir_bh) {
1302                         new_dir_bh = old_dir_bh;
1303                         get_bh(new_dir_bh);
1304                 } else {
1305                         mlog(ML_ERROR, "no old_dir_bh!\n");
1306                         status = -EIO;
1307                         goto bail;
1308                 }
1309         }
1310
1311         /*
1312          * Aside from allowing a meta data update, the locking here
1313          * also ensures that the downconvert thread on other nodes
1314          * won't have to concurrently downconvert the inode and the
1315          * dentry locks.
1316          */
1317         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1318                                          OI_LS_PARENT);
1319         if (status < 0) {
1320                 if (status != -ENOENT)
1321                         mlog_errno(status);
1322                 goto bail;
1323         }
1324         old_child_locked = 1;
1325
1326         status = ocfs2_remote_dentry_delete(old_dentry);
1327         if (status < 0) {
1328                 mlog_errno(status);
1329                 goto bail;
1330         }
1331
1332         if (S_ISDIR(old_inode->i_mode)) {
1333                 u64 old_inode_parent;
1334
1335                 update_dot_dot = 1;
1336                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1337                                                   old_inode,
1338                                                   &old_inode_dot_dot_res);
1339                 if (status) {
1340                         status = -EIO;
1341                         goto bail;
1342                 }
1343
1344                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1345                         status = -EIO;
1346                         goto bail;
1347                 }
1348
1349                 if (!new_inode && new_dir != old_dir &&
1350                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1351                         status = -EMLINK;
1352                         goto bail;
1353                 }
1354         }
1355
1356         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1357                                             old_dentry->d_name.len,
1358                                             &old_de_ino);
1359         if (status) {
1360                 status = -ENOENT;
1361                 goto bail;
1362         }
1363
1364         /*
1365          *  Check for inode number is _not_ due to possible IO errors.
1366          *  We might rmdir the source, keep it as pwd of some process
1367          *  and merrily kill the link to whatever was created under the
1368          *  same name. Goodbye sticky bit ;-<
1369          */
1370         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1371                 status = -ENOENT;
1372                 goto bail;
1373         }
1374
1375         /* check if the target already exists (in which case we need
1376          * to delete it */
1377         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1378                                           new_dentry->d_name.len,
1379                                           &newfe_blkno, new_dir,
1380                                           &target_lookup_res);
1381         /* The only error we allow here is -ENOENT because the new
1382          * file not existing is perfectly valid. */
1383         if ((status < 0) && (status != -ENOENT)) {
1384                 /* If we cannot find the file specified we should just */
1385                 /* return the error... */
1386                 mlog_errno(status);
1387                 goto bail;
1388         }
1389         if (status == 0)
1390                 target_exists = 1;
1391
1392         if (!target_exists && new_inode) {
1393                 /*
1394                  * Target was unlinked by another node while we were
1395                  * waiting to get to ocfs2_rename(). There isn't
1396                  * anything we can do here to help the situation, so
1397                  * bubble up the appropriate error.
1398                  */
1399                 status = -ENOENT;
1400                 goto bail;
1401         }
1402
1403         /* In case we need to overwrite an existing file, we blow it
1404          * away first */
1405         if (target_exists) {
1406                 /* VFS didn't think there existed an inode here, but
1407                  * someone else in the cluster must have raced our
1408                  * rename to create one. Today we error cleanly, in
1409                  * the future we should consider calling iget to build
1410                  * a new struct inode for this entry. */
1411                 if (!new_inode) {
1412                         status = -EACCES;
1413
1414                         trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1415                                                 new_dentry->d_name.name);
1416                         goto bail;
1417                 }
1418
1419                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1420                         status = -EACCES;
1421
1422                         trace_ocfs2_rename_disagree(
1423                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1424                              (unsigned long long)newfe_blkno,
1425                              OCFS2_I(new_inode)->ip_flags);
1426                         goto bail;
1427                 }
1428
1429                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1430                 if (status < 0) {
1431                         if (status != -ENOENT)
1432                                 mlog_errno(status);
1433                         goto bail;
1434                 }
1435                 new_child_locked = 1;
1436
1437                 status = ocfs2_remote_dentry_delete(new_dentry);
1438                 if (status < 0) {
1439                         mlog_errno(status);
1440                         goto bail;
1441                 }
1442
1443                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1444
1445                 trace_ocfs2_rename_over_existing(
1446                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1447                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1448
1449                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1450                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1451                                                 OCFS2_I(new_inode)->ip_blkno,
1452                                                 orphan_name, &orphan_insert,
1453                                                 false);
1454                         if (status < 0) {
1455                                 mlog_errno(status);
1456                                 goto bail;
1457                         }
1458                         should_add_orphan = true;
1459                 }
1460         } else {
1461                 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1462
1463                 status = ocfs2_check_dir_for_entry(new_dir,
1464                                                    new_dentry->d_name.name,
1465                                                    new_dentry->d_name.len);
1466                 if (status)
1467                         goto bail;
1468
1469                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1470                                                       new_dentry->d_name.name,
1471                                                       new_dentry->d_name.len,
1472                                                       &target_insert);
1473                 if (status < 0) {
1474                         mlog_errno(status);
1475                         goto bail;
1476                 }
1477         }
1478
1479         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1480         if (IS_ERR(handle)) {
1481                 status = PTR_ERR(handle);
1482                 handle = NULL;
1483                 mlog_errno(status);
1484                 goto bail;
1485         }
1486
1487         if (target_exists) {
1488                 if (S_ISDIR(new_inode->i_mode)) {
1489                         if (new_inode->i_nlink != 2 ||
1490                             !ocfs2_empty_dir(new_inode)) {
1491                                 status = -ENOTEMPTY;
1492                                 goto bail;
1493                         }
1494                 }
1495                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1496                                                  newfe_bh,
1497                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1498                 if (status < 0) {
1499                         mlog_errno(status);
1500                         goto bail;
1501                 }
1502
1503                 /* change the dirent to point to the correct inode */
1504                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1505                                             old_inode);
1506                 if (status < 0) {
1507                         mlog_errno(status);
1508                         goto bail;
1509                 }
1510                 inode_inc_iversion(new_dir);
1511
1512                 if (S_ISDIR(new_inode->i_mode))
1513                         ocfs2_set_links_count(newfe, 0);
1514                 else
1515                         ocfs2_add_links_count(newfe, -1);
1516                 ocfs2_journal_dirty(handle, newfe_bh);
1517                 if (should_add_orphan) {
1518                         status = ocfs2_orphan_add(osb, handle, new_inode,
1519                                         newfe_bh, orphan_name,
1520                                         &orphan_insert, orphan_dir, false);
1521                         if (status < 0) {
1522                                 mlog_errno(status);
1523                                 goto bail;
1524                         }
1525                 }
1526         } else {
1527                 /* if the name was not found in new_dir, add it now */
1528                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1529                                          OCFS2_I(old_inode)->ip_blkno,
1530                                          new_dir_bh, &target_insert);
1531         }
1532
1533         old_inode->i_ctime = current_time(old_inode);
1534         mark_inode_dirty(old_inode);
1535
1536         status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1537                                          old_inode_bh,
1538                                          OCFS2_JOURNAL_ACCESS_WRITE);
1539         if (status >= 0) {
1540                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1541
1542                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1543                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1544                 ocfs2_journal_dirty(handle, old_inode_bh);
1545         } else
1546                 mlog_errno(status);
1547
1548         /*
1549          * Now that the name has been added to new_dir, remove the old name.
1550          *
1551          * We don't keep any directory entry context around until now
1552          * because the insert might have changed the type of directory
1553          * we're dealing with.
1554          */
1555         status = ocfs2_find_entry(old_dentry->d_name.name,
1556                                   old_dentry->d_name.len, old_dir,
1557                                   &old_entry_lookup);
1558         if (status) {
1559                 if (!is_journal_aborted(osb->journal->j_journal)) {
1560                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1561                                         "is not deleted.",
1562                                         new_dentry->d_name.len, new_dentry->d_name.name,
1563                                         old_dentry->d_name.len, old_dentry->d_name.name);
1564                 }
1565                 goto bail;
1566         }
1567
1568         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1569         if (status < 0) {
1570                 mlog_errno(status);
1571                 if (!is_journal_aborted(osb->journal->j_journal)) {
1572                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1573                                         "is not deleted.",
1574                                         new_dentry->d_name.len, new_dentry->d_name.name,
1575                                         old_dentry->d_name.len, old_dentry->d_name.name);
1576                 }
1577                 goto bail;
1578         }
1579
1580         if (new_inode) {
1581                 drop_nlink(new_inode);
1582                 new_inode->i_ctime = current_time(new_inode);
1583         }
1584         old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
1585
1586         if (update_dot_dot) {
1587                 status = ocfs2_update_entry(old_inode, handle,
1588                                             &old_inode_dot_dot_res, new_dir);
1589                 drop_nlink(old_dir);
1590                 if (new_inode) {
1591                         drop_nlink(new_inode);
1592                 } else {
1593                         inc_nlink(new_dir);
1594                         mark_inode_dirty(new_dir);
1595                 }
1596         }
1597         mark_inode_dirty(old_dir);
1598         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1599         if (new_inode) {
1600                 mark_inode_dirty(new_inode);
1601                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1602         }
1603
1604         if (old_dir != new_dir) {
1605                 /* Keep the same times on both directories.*/
1606                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1607
1608                 /*
1609                  * This will also pick up the i_nlink change from the
1610                  * block above.
1611                  */
1612                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1613         }
1614
1615         if (old_dir_nlink != old_dir->i_nlink) {
1616                 if (!old_dir_bh) {
1617                         mlog(ML_ERROR, "need to change nlink for old dir "
1618                              "%llu from %d to %d but bh is NULL!\n",
1619                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1620                              (int)old_dir_nlink, old_dir->i_nlink);
1621                 } else {
1622                         struct ocfs2_dinode *fe;
1623                         status = ocfs2_journal_access_di(handle,
1624                                                          INODE_CACHE(old_dir),
1625                                                          old_dir_bh,
1626                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1627                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1628                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1629                         ocfs2_journal_dirty(handle, old_dir_bh);
1630                 }
1631         }
1632         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1633         status = 0;
1634 bail:
1635         if (handle)
1636                 ocfs2_commit_trans(osb, handle);
1637
1638         if (orphan_dir) {
1639                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1640                 ocfs2_inode_unlock(orphan_dir, 1);
1641                 inode_unlock(orphan_dir);
1642                 iput(orphan_dir);
1643         }
1644
1645         if (new_child_locked)
1646                 ocfs2_inode_unlock(new_inode, 1);
1647
1648         if (old_child_locked)
1649                 ocfs2_inode_unlock(old_inode, 1);
1650
1651         if (parents_locked)
1652                 ocfs2_double_unlock(old_dir, new_dir);
1653
1654         if (rename_lock)
1655                 ocfs2_rename_unlock(osb);
1656
1657         if (new_inode)
1658                 sync_mapping_buffers(old_inode->i_mapping);
1659
1660         iput(new_inode);
1661
1662         ocfs2_free_dir_lookup_result(&target_lookup_res);
1663         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1664         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1665         ocfs2_free_dir_lookup_result(&orphan_insert);
1666         ocfs2_free_dir_lookup_result(&target_insert);
1667
1668         brelse(newfe_bh);
1669         brelse(old_inode_bh);
1670         brelse(old_dir_bh);
1671         brelse(new_dir_bh);
1672
1673         if (status)
1674                 mlog_errno(status);
1675
1676         return status;
1677 }
1678
1679 /*
1680  * we expect i_size = strlen(symname). Copy symname into the file
1681  * data, including the null terminator.
1682  */
1683 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1684                                      handle_t *handle,
1685                                      struct inode *inode,
1686                                      const char *symname)
1687 {
1688         struct buffer_head **bhs = NULL;
1689         const char *c;
1690         struct super_block *sb = osb->sb;
1691         u64 p_blkno, p_blocks;
1692         int virtual, blocks, status, i, bytes_left;
1693
1694         bytes_left = i_size_read(inode) + 1;
1695         /* we can't trust i_blocks because we're actually going to
1696          * write i_size + 1 bytes. */
1697         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1698
1699         trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1700                                         i_size_read(inode), blocks);
1701
1702         /* Sanity check -- make sure we're going to fit. */
1703         if (bytes_left >
1704             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1705                 status = -EIO;
1706                 mlog_errno(status);
1707                 goto bail;
1708         }
1709
1710         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1711         if (!bhs) {
1712                 status = -ENOMEM;
1713                 mlog_errno(status);
1714                 goto bail;
1715         }
1716
1717         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1718                                              NULL);
1719         if (status < 0) {
1720                 mlog_errno(status);
1721                 goto bail;
1722         }
1723
1724         /* links can never be larger than one cluster so we know this
1725          * is all going to be contiguous, but do a sanity check
1726          * anyway. */
1727         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1728                 status = -EIO;
1729                 mlog_errno(status);
1730                 goto bail;
1731         }
1732
1733         virtual = 0;
1734         while(bytes_left > 0) {
1735                 c = &symname[virtual * sb->s_blocksize];
1736
1737                 bhs[virtual] = sb_getblk(sb, p_blkno);
1738                 if (!bhs[virtual]) {
1739                         status = -ENOMEM;
1740                         mlog_errno(status);
1741                         goto bail;
1742                 }
1743                 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1744                                               bhs[virtual]);
1745
1746                 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1747                                               bhs[virtual],
1748                                               OCFS2_JOURNAL_ACCESS_CREATE);
1749                 if (status < 0) {
1750                         mlog_errno(status);
1751                         goto bail;
1752                 }
1753
1754                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1755
1756                 memcpy(bhs[virtual]->b_data, c,
1757                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1758                        bytes_left);
1759
1760                 ocfs2_journal_dirty(handle, bhs[virtual]);
1761
1762                 virtual++;
1763                 p_blkno++;
1764                 bytes_left -= sb->s_blocksize;
1765         }
1766
1767         status = 0;
1768 bail:
1769
1770         if (bhs) {
1771                 for(i = 0; i < blocks; i++)
1772                         brelse(bhs[i]);
1773                 kfree(bhs);
1774         }
1775
1776         if (status)
1777                 mlog_errno(status);
1778         return status;
1779 }
1780
1781 static int ocfs2_symlink(struct inode *dir,
1782                          struct dentry *dentry,
1783                          const char *symname)
1784 {
1785         int status, l, credits;
1786         u64 newsize;
1787         struct ocfs2_super *osb = NULL;
1788         struct inode *inode = NULL;
1789         struct super_block *sb;
1790         struct buffer_head *new_fe_bh = NULL;
1791         struct buffer_head *parent_fe_bh = NULL;
1792         struct ocfs2_dinode *fe = NULL;
1793         struct ocfs2_dinode *dirfe;
1794         handle_t *handle = NULL;
1795         struct ocfs2_alloc_context *inode_ac = NULL;
1796         struct ocfs2_alloc_context *data_ac = NULL;
1797         struct ocfs2_alloc_context *xattr_ac = NULL;
1798         int want_clusters = 0;
1799         int xattr_credits = 0;
1800         struct ocfs2_security_xattr_info si = {
1801                 .enable = 1,
1802         };
1803         int did_quota = 0, did_quota_inode = 0;
1804         struct ocfs2_dir_lookup_result lookup = { NULL, };
1805         sigset_t oldset;
1806         int did_block_signals = 0;
1807         struct ocfs2_dentry_lock *dl = NULL;
1808
1809         trace_ocfs2_symlink_begin(dir, dentry, symname,
1810                                   dentry->d_name.len, dentry->d_name.name);
1811
1812         status = dquot_initialize(dir);
1813         if (status) {
1814                 mlog_errno(status);
1815                 goto bail;
1816         }
1817
1818         sb = dir->i_sb;
1819         osb = OCFS2_SB(sb);
1820
1821         l = strlen(symname) + 1;
1822
1823         credits = ocfs2_calc_symlink_credits(sb);
1824
1825         /* lock the parent directory */
1826         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1827         if (status < 0) {
1828                 if (status != -ENOENT)
1829                         mlog_errno(status);
1830                 return status;
1831         }
1832
1833         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1834         if (!ocfs2_read_links_count(dirfe)) {
1835                 /* can't make a file in a deleted directory. */
1836                 status = -ENOENT;
1837                 goto bail;
1838         }
1839
1840         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1841                                            dentry->d_name.len);
1842         if (status)
1843                 goto bail;
1844
1845         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1846                                               dentry->d_name.name,
1847                                               dentry->d_name.len, &lookup);
1848         if (status < 0) {
1849                 mlog_errno(status);
1850                 goto bail;
1851         }
1852
1853         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1854         if (status < 0) {
1855                 if (status != -ENOSPC)
1856                         mlog_errno(status);
1857                 goto bail;
1858         }
1859
1860         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1861         if (IS_ERR(inode)) {
1862                 status = PTR_ERR(inode);
1863                 inode = NULL;
1864                 mlog_errno(status);
1865                 goto bail;
1866         }
1867
1868         /* get security xattr */
1869         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1870         if (status) {
1871                 if (status == -EOPNOTSUPP)
1872                         si.enable = 0;
1873                 else {
1874                         mlog_errno(status);
1875                         goto bail;
1876                 }
1877         }
1878
1879         /* calculate meta data/clusters for setting security xattr */
1880         if (si.enable) {
1881                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1882                                                   &xattr_credits, &xattr_ac);
1883                 if (status < 0) {
1884                         mlog_errno(status);
1885                         goto bail;
1886                 }
1887         }
1888
1889         /* don't reserve bitmap space for fast symlinks. */
1890         if (l > ocfs2_fast_symlink_chars(sb))
1891                 want_clusters += 1;
1892
1893         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1894         if (status < 0) {
1895                 if (status != -ENOSPC)
1896                         mlog_errno(status);
1897                 goto bail;
1898         }
1899
1900         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1901         if (IS_ERR(handle)) {
1902                 status = PTR_ERR(handle);
1903                 handle = NULL;
1904                 mlog_errno(status);
1905                 goto bail;
1906         }
1907
1908         /* Starting to change things, restart is no longer possible. */
1909         ocfs2_block_signals(&oldset);
1910         did_block_signals = 1;
1911
1912         status = dquot_alloc_inode(inode);
1913         if (status)
1914                 goto bail;
1915         did_quota_inode = 1;
1916
1917         trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1918                                    dentry->d_name.name,
1919                                    (unsigned long long)OCFS2_I(dir)->ip_blkno,
1920                                    inode->i_mode);
1921
1922         status = ocfs2_mknod_locked(osb, dir, inode,
1923                                     0, &new_fe_bh, parent_fe_bh, handle,
1924                                     inode_ac);
1925         if (status < 0) {
1926                 mlog_errno(status);
1927                 goto bail;
1928         }
1929
1930         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1931         inode->i_rdev = 0;
1932         newsize = l - 1;
1933         inode->i_op = &ocfs2_symlink_inode_operations;
1934         inode_nohighmem(inode);
1935         if (l > ocfs2_fast_symlink_chars(sb)) {
1936                 u32 offset = 0;
1937
1938                 status = dquot_alloc_space_nodirty(inode,
1939                     ocfs2_clusters_to_bytes(osb->sb, 1));
1940                 if (status)
1941                         goto bail;
1942                 did_quota = 1;
1943                 inode->i_mapping->a_ops = &ocfs2_aops;
1944                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1945                                               new_fe_bh,
1946                                               handle, data_ac, NULL,
1947                                               NULL);
1948                 if (status < 0) {
1949                         if (status != -ENOSPC && status != -EINTR) {
1950                                 mlog(ML_ERROR,
1951                                      "Failed to extend file to %llu\n",
1952                                      (unsigned long long)newsize);
1953                                 mlog_errno(status);
1954                                 status = -ENOSPC;
1955                         }
1956                         goto bail;
1957                 }
1958                 i_size_write(inode, newsize);
1959                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1960         } else {
1961                 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1962                 memcpy((char *) fe->id2.i_symlink, symname, l);
1963                 i_size_write(inode, newsize);
1964                 inode->i_blocks = 0;
1965         }
1966
1967         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1968         if (status < 0) {
1969                 mlog_errno(status);
1970                 goto bail;
1971         }
1972
1973         if (!ocfs2_inode_is_fast_symlink(inode)) {
1974                 status = ocfs2_create_symlink_data(osb, handle, inode,
1975                                                    symname);
1976                 if (status < 0) {
1977                         mlog_errno(status);
1978                         goto bail;
1979                 }
1980         }
1981
1982         if (si.enable) {
1983                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1984                                                  xattr_ac, data_ac);
1985                 if (status < 0) {
1986                         mlog_errno(status);
1987                         goto bail;
1988                 }
1989         }
1990
1991         /*
1992          * Do this before adding the entry to the directory. We add
1993          * also set d_op after success so that ->d_iput() will cleanup
1994          * the dentry lock even if ocfs2_add_entry() fails below.
1995          */
1996         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1997         if (status) {
1998                 mlog_errno(status);
1999                 goto bail;
2000         }
2001
2002         dl = dentry->d_fsdata;
2003
2004         status = ocfs2_add_entry(handle, dentry, inode,
2005                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
2006                                  &lookup);
2007         if (status < 0) {
2008                 mlog_errno(status);
2009                 goto bail;
2010         }
2011
2012         insert_inode_hash(inode);
2013         d_instantiate(dentry, inode);
2014 bail:
2015         if (status < 0 && did_quota)
2016                 dquot_free_space_nodirty(inode,
2017                                         ocfs2_clusters_to_bytes(osb->sb, 1));
2018         if (status < 0 && did_quota_inode)
2019                 dquot_free_inode(inode);
2020         if (handle)
2021                 ocfs2_commit_trans(osb, handle);
2022
2023         ocfs2_inode_unlock(dir, 1);
2024         if (did_block_signals)
2025                 ocfs2_unblock_signals(&oldset);
2026
2027         brelse(new_fe_bh);
2028         brelse(parent_fe_bh);
2029         kfree(si.value);
2030         ocfs2_free_dir_lookup_result(&lookup);
2031         if (inode_ac)
2032                 ocfs2_free_alloc_context(inode_ac);
2033         if (data_ac)
2034                 ocfs2_free_alloc_context(data_ac);
2035         if (xattr_ac)
2036                 ocfs2_free_alloc_context(xattr_ac);
2037         if ((status < 0) && inode) {
2038                 if (dl)
2039                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2040
2041                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2042                 clear_nlink(inode);
2043                 iput(inode);
2044         }
2045
2046         if (status)
2047                 mlog_errno(status);
2048
2049         return status;
2050 }
2051
2052 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2053 {
2054         int status, namelen;
2055
2056         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2057                            (long long)blkno);
2058         if (namelen <= 0) {
2059                 if (namelen)
2060                         status = namelen;
2061                 else
2062                         status = -EINVAL;
2063                 mlog_errno(status);
2064                 goto bail;
2065         }
2066         if (namelen != OCFS2_ORPHAN_NAMELEN) {
2067                 status = -EINVAL;
2068                 mlog_errno(status);
2069                 goto bail;
2070         }
2071
2072         trace_ocfs2_blkno_stringify(blkno, name, namelen);
2073
2074         status = 0;
2075 bail:
2076         if (status < 0)
2077                 mlog_errno(status);
2078         return status;
2079 }
2080
2081 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2082                                         struct inode **ret_orphan_dir,
2083                                         struct buffer_head **ret_orphan_dir_bh)
2084 {
2085         struct inode *orphan_dir_inode;
2086         struct buffer_head *orphan_dir_bh = NULL;
2087         int ret = 0;
2088
2089         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2090                                                        ORPHAN_DIR_SYSTEM_INODE,
2091                                                        osb->slot_num);
2092         if (!orphan_dir_inode) {
2093                 ret = -ENOENT;
2094                 mlog_errno(ret);
2095                 return ret;
2096         }
2097
2098         inode_lock(orphan_dir_inode);
2099
2100         ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2101         if (ret < 0) {
2102                 inode_unlock(orphan_dir_inode);
2103                 iput(orphan_dir_inode);
2104
2105                 mlog_errno(ret);
2106                 return ret;
2107         }
2108
2109         *ret_orphan_dir = orphan_dir_inode;
2110         *ret_orphan_dir_bh = orphan_dir_bh;
2111
2112         return 0;
2113 }
2114
2115 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2116                                       struct buffer_head *orphan_dir_bh,
2117                                       u64 blkno,
2118                                       char *name,
2119                                       struct ocfs2_dir_lookup_result *lookup,
2120                                       bool dio)
2121 {
2122         int ret;
2123         struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2124         int namelen = dio ?
2125                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2126                         OCFS2_ORPHAN_NAMELEN;
2127
2128         if (dio) {
2129                 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2130                                 OCFS2_DIO_ORPHAN_PREFIX);
2131                 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2132                         ret = -EINVAL;
2133                         mlog_errno(ret);
2134                         return ret;
2135                 }
2136
2137                 ret = ocfs2_blkno_stringify(blkno,
2138                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2139         } else
2140                 ret = ocfs2_blkno_stringify(blkno, name);
2141         if (ret < 0) {
2142                 mlog_errno(ret);
2143                 return ret;
2144         }
2145
2146         ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2147                                            orphan_dir_bh, name,
2148                                            namelen, lookup);
2149         if (ret < 0) {
2150                 mlog_errno(ret);
2151                 return ret;
2152         }
2153
2154         return 0;
2155 }
2156
2157 /**
2158  * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2159  * insertion of an orphan.
2160  * @osb: ocfs2 file system
2161  * @ret_orphan_dir: Orphan dir inode - returned locked!
2162  * @blkno: Actual block number of the inode to be inserted into orphan dir.
2163  * @lookup: dir lookup result, to be passed back into functions like
2164  *          ocfs2_orphan_add
2165  *
2166  * Returns zero on success and the ret_orphan_dir, name and lookup
2167  * fields will be populated.
2168  *
2169  * Returns non-zero on failure.
2170  */
2171 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2172                                     struct inode **ret_orphan_dir,
2173                                     u64 blkno,
2174                                     char *name,
2175                                     struct ocfs2_dir_lookup_result *lookup,
2176                                     bool dio)
2177 {
2178         struct inode *orphan_dir_inode = NULL;
2179         struct buffer_head *orphan_dir_bh = NULL;
2180         int ret = 0;
2181
2182         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2183                                            &orphan_dir_bh);
2184         if (ret < 0) {
2185                 mlog_errno(ret);
2186                 return ret;
2187         }
2188
2189         ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2190                                          blkno, name, lookup, dio);
2191         if (ret < 0) {
2192                 mlog_errno(ret);
2193                 goto out;
2194         }
2195
2196         *ret_orphan_dir = orphan_dir_inode;
2197
2198 out:
2199         brelse(orphan_dir_bh);
2200
2201         if (ret) {
2202                 ocfs2_inode_unlock(orphan_dir_inode, 1);
2203                 inode_unlock(orphan_dir_inode);
2204                 iput(orphan_dir_inode);
2205         }
2206
2207         if (ret)
2208                 mlog_errno(ret);
2209         return ret;
2210 }
2211
2212 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2213                             handle_t *handle,
2214                             struct inode *inode,
2215                             struct buffer_head *fe_bh,
2216                             char *name,
2217                             struct ocfs2_dir_lookup_result *lookup,
2218                             struct inode *orphan_dir_inode,
2219                             bool dio)
2220 {
2221         struct buffer_head *orphan_dir_bh = NULL;
2222         int status = 0;
2223         struct ocfs2_dinode *orphan_fe;
2224         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2225         int namelen = dio ?
2226                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2227                         OCFS2_ORPHAN_NAMELEN;
2228
2229         trace_ocfs2_orphan_add_begin(
2230                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2231
2232         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2233         if (status < 0) {
2234                 mlog_errno(status);
2235                 goto leave;
2236         }
2237
2238         status = ocfs2_journal_access_di(handle,
2239                                          INODE_CACHE(orphan_dir_inode),
2240                                          orphan_dir_bh,
2241                                          OCFS2_JOURNAL_ACCESS_WRITE);
2242         if (status < 0) {
2243                 mlog_errno(status);
2244                 goto leave;
2245         }
2246
2247         /*
2248          * We're going to journal the change of i_flags and i_orphaned_slot.
2249          * It's safe anyway, though some callers may duplicate the journaling.
2250          * Journaling within the func just make the logic look more
2251          * straightforward.
2252          */
2253         status = ocfs2_journal_access_di(handle,
2254                                          INODE_CACHE(inode),
2255                                          fe_bh,
2256                                          OCFS2_JOURNAL_ACCESS_WRITE);
2257         if (status < 0) {
2258                 mlog_errno(status);
2259                 goto leave;
2260         }
2261
2262         /* we're a cluster, and nlink can change on disk from
2263          * underneath us... */
2264         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2265         if (S_ISDIR(inode->i_mode))
2266                 ocfs2_add_links_count(orphan_fe, 1);
2267         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2268         ocfs2_journal_dirty(handle, orphan_dir_bh);
2269
2270         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2271                                    namelen, inode,
2272                                    OCFS2_I(inode)->ip_blkno,
2273                                    orphan_dir_bh, lookup);
2274         if (status < 0) {
2275                 mlog_errno(status);
2276                 goto rollback;
2277         }
2278
2279         if (dio) {
2280                 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2281                  * slot.
2282                  */
2283                 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2284                 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2285         } else {
2286                 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2287                 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2288
2289                 /* Record which orphan dir our inode now resides
2290                  * in. delete_inode will use this to determine which orphan
2291                  * dir to lock. */
2292                 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2293         }
2294
2295         ocfs2_journal_dirty(handle, fe_bh);
2296
2297         trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2298                                    osb->slot_num);
2299
2300 rollback:
2301         if (status < 0) {
2302                 if (S_ISDIR(inode->i_mode))
2303                         ocfs2_add_links_count(orphan_fe, -1);
2304                 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2305         }
2306
2307 leave:
2308         brelse(orphan_dir_bh);
2309
2310         return status;
2311 }
2312
2313 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2314 int ocfs2_orphan_del(struct ocfs2_super *osb,
2315                      handle_t *handle,
2316                      struct inode *orphan_dir_inode,
2317                      struct inode *inode,
2318                      struct buffer_head *orphan_dir_bh,
2319                      bool dio)
2320 {
2321         char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2322         struct ocfs2_dinode *orphan_fe;
2323         int status = 0;
2324         struct ocfs2_dir_lookup_result lookup = { NULL, };
2325
2326         if (dio) {
2327                 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2328                                 OCFS2_DIO_ORPHAN_PREFIX);
2329                 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2330                         status = -EINVAL;
2331                         mlog_errno(status);
2332                         return status;
2333                 }
2334
2335                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2336                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2337         } else
2338                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2339         if (status < 0) {
2340                 mlog_errno(status);
2341                 goto leave;
2342         }
2343
2344         trace_ocfs2_orphan_del(
2345              (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2346              name, strlen(name));
2347
2348         status = ocfs2_journal_access_di(handle,
2349                                          INODE_CACHE(orphan_dir_inode),
2350                                          orphan_dir_bh,
2351                                          OCFS2_JOURNAL_ACCESS_WRITE);
2352         if (status < 0) {
2353                 mlog_errno(status);
2354                 goto leave;
2355         }
2356
2357         /* find it's spot in the orphan directory */
2358         status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2359                                   &lookup);
2360         if (status) {
2361                 mlog_errno(status);
2362                 goto leave;
2363         }
2364
2365         /* remove it from the orphan directory */
2366         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2367         if (status < 0) {
2368                 mlog_errno(status);
2369                 goto leave;
2370         }
2371
2372         /* do the i_nlink dance! :) */
2373         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2374         if (S_ISDIR(inode->i_mode))
2375                 ocfs2_add_links_count(orphan_fe, -1);
2376         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2377         ocfs2_journal_dirty(handle, orphan_dir_bh);
2378
2379 leave:
2380         ocfs2_free_dir_lookup_result(&lookup);
2381
2382         if (status)
2383                 mlog_errno(status);
2384         return status;
2385 }
2386
2387 /**
2388  * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2389  * allocated file. This is different from the typical 'add to orphan dir'
2390  * operation in that the inode does not yet exist. This is a problem because
2391  * the orphan dir stringifies the inode block number to come up with it's
2392  * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2393  * problem. This function works around it by calling deeper into the orphan
2394  * and suballoc code than other callers. Use this only by necessity.
2395  * @dir: The directory which this inode will ultimately wind up under - not the
2396  * orphan dir!
2397  * @dir_bh: buffer_head the @dir inode block
2398  * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2399  * with the string to be used for orphan dirent. Pass back to the orphan dir
2400  * code.
2401  * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2402  * dir code.
2403  * @ret_di_blkno: block number where the new inode will be allocated.
2404  * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2405  * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2406  *
2407  * Returns zero on success and the ret_orphan_dir, name and lookup
2408  * fields will be populated.
2409  *
2410  * Returns non-zero on failure.
2411  */
2412 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2413                                         struct buffer_head *dir_bh,
2414                                         char *orphan_name,
2415                                         struct inode **ret_orphan_dir,
2416                                         u64 *ret_di_blkno,
2417                                         struct ocfs2_dir_lookup_result *orphan_insert,
2418                                         struct ocfs2_alloc_context **ret_inode_ac)
2419 {
2420         int ret;
2421         u64 di_blkno;
2422         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2423         struct inode *orphan_dir = NULL;
2424         struct buffer_head *orphan_dir_bh = NULL;
2425         struct ocfs2_alloc_context *inode_ac = NULL;
2426
2427         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2428         if (ret < 0) {
2429                 mlog_errno(ret);
2430                 return ret;
2431         }
2432
2433         /* reserve an inode spot */
2434         ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2435         if (ret < 0) {
2436                 if (ret != -ENOSPC)
2437                         mlog_errno(ret);
2438                 goto out;
2439         }
2440
2441         ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2442                                        &di_blkno);
2443         if (ret) {
2444                 mlog_errno(ret);
2445                 goto out;
2446         }
2447
2448         ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2449                                          di_blkno, orphan_name, orphan_insert,
2450                                          false);
2451         if (ret < 0) {
2452                 mlog_errno(ret);
2453                 goto out;
2454         }
2455
2456 out:
2457         if (ret == 0) {
2458                 *ret_orphan_dir = orphan_dir;
2459                 *ret_di_blkno = di_blkno;
2460                 *ret_inode_ac = inode_ac;
2461                 /*
2462                  * orphan_name and orphan_insert are already up to
2463                  * date via prepare_orphan_dir
2464                  */
2465         } else {
2466                 /* Unroll reserve_new_inode* */
2467                 if (inode_ac)
2468                         ocfs2_free_alloc_context(inode_ac);
2469
2470                 /* Unroll orphan dir locking */
2471                 inode_unlock(orphan_dir);
2472                 ocfs2_inode_unlock(orphan_dir, 1);
2473                 iput(orphan_dir);
2474         }
2475
2476         brelse(orphan_dir_bh);
2477
2478         return ret;
2479 }
2480
2481 int ocfs2_create_inode_in_orphan(struct inode *dir,
2482                                  int mode,
2483                                  struct inode **new_inode)
2484 {
2485         int status, did_quota_inode = 0;
2486         struct inode *inode = NULL;
2487         struct inode *orphan_dir = NULL;
2488         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2489         struct ocfs2_dinode *di = NULL;
2490         handle_t *handle = NULL;
2491         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2492         struct buffer_head *parent_di_bh = NULL;
2493         struct buffer_head *new_di_bh = NULL;
2494         struct ocfs2_alloc_context *inode_ac = NULL;
2495         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2496         u64 uninitialized_var(di_blkno), suballoc_loc;
2497         u16 suballoc_bit;
2498
2499         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2500         if (status < 0) {
2501                 if (status != -ENOENT)
2502                         mlog_errno(status);
2503                 return status;
2504         }
2505
2506         status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2507                                               orphan_name, &orphan_dir,
2508                                               &di_blkno, &orphan_insert, &inode_ac);
2509         if (status < 0) {
2510                 if (status != -ENOSPC)
2511                         mlog_errno(status);
2512                 goto leave;
2513         }
2514
2515         inode = ocfs2_get_init_inode(dir, mode);
2516         if (IS_ERR(inode)) {
2517                 status = PTR_ERR(inode);
2518                 inode = NULL;
2519                 mlog_errno(status);
2520                 goto leave;
2521         }
2522
2523         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2524         if (IS_ERR(handle)) {
2525                 status = PTR_ERR(handle);
2526                 handle = NULL;
2527                 mlog_errno(status);
2528                 goto leave;
2529         }
2530
2531         status = dquot_alloc_inode(inode);
2532         if (status)
2533                 goto leave;
2534         did_quota_inode = 1;
2535
2536         status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2537                                               &suballoc_loc,
2538                                               &suballoc_bit, di_blkno);
2539         if (status < 0) {
2540                 mlog_errno(status);
2541                 goto leave;
2542         }
2543
2544         clear_nlink(inode);
2545         /* do the real work now. */
2546         status = __ocfs2_mknod_locked(dir, inode,
2547                                       0, &new_di_bh, parent_di_bh, handle,
2548                                       inode_ac, di_blkno, suballoc_loc,
2549                                       suballoc_bit);
2550         if (status < 0) {
2551                 mlog_errno(status);
2552                 goto leave;
2553         }
2554
2555         di = (struct ocfs2_dinode *)new_di_bh->b_data;
2556         status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2557                                   &orphan_insert, orphan_dir, false);
2558         if (status < 0) {
2559                 mlog_errno(status);
2560                 goto leave;
2561         }
2562
2563         /* get open lock so that only nodes can't remove it from orphan dir. */
2564         status = ocfs2_open_lock(inode);
2565         if (status < 0)
2566                 mlog_errno(status);
2567
2568         insert_inode_hash(inode);
2569 leave:
2570         if (status < 0 && did_quota_inode)
2571                 dquot_free_inode(inode);
2572         if (handle)
2573                 ocfs2_commit_trans(osb, handle);
2574
2575         if (orphan_dir) {
2576                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2577                 ocfs2_inode_unlock(orphan_dir, 1);
2578                 inode_unlock(orphan_dir);
2579                 iput(orphan_dir);
2580         }
2581
2582         if ((status < 0) && inode) {
2583                 clear_nlink(inode);
2584                 iput(inode);
2585         }
2586
2587         if (inode_ac)
2588                 ocfs2_free_alloc_context(inode_ac);
2589
2590         brelse(new_di_bh);
2591
2592         if (!status)
2593                 *new_inode = inode;
2594
2595         ocfs2_free_dir_lookup_result(&orphan_insert);
2596
2597         ocfs2_inode_unlock(dir, 1);
2598         brelse(parent_di_bh);
2599         return status;
2600 }
2601
2602 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2603         struct inode *inode)
2604 {
2605         char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2606         struct inode *orphan_dir_inode = NULL;
2607         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2608         struct buffer_head *di_bh = NULL;
2609         int status = 0;
2610         handle_t *handle = NULL;
2611         struct ocfs2_dinode *di = NULL;
2612
2613         status = ocfs2_inode_lock(inode, &di_bh, 1);
2614         if (status < 0) {
2615                 mlog_errno(status);
2616                 goto bail;
2617         }
2618
2619         di = (struct ocfs2_dinode *) di_bh->b_data;
2620         /*
2621          * Another append dio crashed?
2622          * If so, manually recover it first.
2623          */
2624         if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2625                 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2626                 if (status < 0) {
2627                         if (status != -ENOSPC)
2628                                 mlog_errno(status);
2629                         goto bail_unlock_inode;
2630                 }
2631
2632                 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2633                 if (status < 0) {
2634                         mlog_errno(status);
2635                         goto bail_unlock_inode;
2636                 }
2637         }
2638
2639         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2640                         OCFS2_I(inode)->ip_blkno,
2641                         orphan_name,
2642                         &orphan_insert,
2643                         true);
2644         if (status < 0) {
2645                 mlog_errno(status);
2646                 goto bail_unlock_inode;
2647         }
2648
2649         handle = ocfs2_start_trans(osb,
2650                         OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2651         if (IS_ERR(handle)) {
2652                 status = PTR_ERR(handle);
2653                 goto bail_unlock_orphan;
2654         }
2655
2656         status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2657                         &orphan_insert, orphan_dir_inode, true);
2658         if (status)
2659                 mlog_errno(status);
2660
2661         ocfs2_commit_trans(osb, handle);
2662
2663 bail_unlock_orphan:
2664         ocfs2_inode_unlock(orphan_dir_inode, 1);
2665         inode_unlock(orphan_dir_inode);
2666         iput(orphan_dir_inode);
2667
2668         ocfs2_free_dir_lookup_result(&orphan_insert);
2669
2670 bail_unlock_inode:
2671         ocfs2_inode_unlock(inode, 1);
2672         brelse(di_bh);
2673
2674 bail:
2675         return status;
2676 }
2677
2678 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2679                 struct inode *inode, struct buffer_head *di_bh,
2680                 int update_isize, loff_t end)
2681 {
2682         struct inode *orphan_dir_inode = NULL;
2683         struct buffer_head *orphan_dir_bh = NULL;
2684         struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2685         handle_t *handle = NULL;
2686         int status = 0;
2687
2688         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2689                         ORPHAN_DIR_SYSTEM_INODE,
2690                         le16_to_cpu(di->i_dio_orphaned_slot));
2691         if (!orphan_dir_inode) {
2692                 status = -ENOENT;
2693                 mlog_errno(status);
2694                 goto bail;
2695         }
2696
2697         inode_lock(orphan_dir_inode);
2698         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2699         if (status < 0) {
2700                 inode_unlock(orphan_dir_inode);
2701                 iput(orphan_dir_inode);
2702                 mlog_errno(status);
2703                 goto bail;
2704         }
2705
2706         handle = ocfs2_start_trans(osb,
2707                         OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2708         if (IS_ERR(handle)) {
2709                 status = PTR_ERR(handle);
2710                 goto bail_unlock_orphan;
2711         }
2712
2713         BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2714
2715         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2716                                 inode, orphan_dir_bh, true);
2717         if (status < 0) {
2718                 mlog_errno(status);
2719                 goto bail_commit;
2720         }
2721
2722         status = ocfs2_journal_access_di(handle,
2723                         INODE_CACHE(inode),
2724                         di_bh,
2725                         OCFS2_JOURNAL_ACCESS_WRITE);
2726         if (status < 0) {
2727                 mlog_errno(status);
2728                 goto bail_commit;
2729         }
2730
2731         di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2732         di->i_dio_orphaned_slot = 0;
2733
2734         if (update_isize) {
2735                 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2736                 if (status)
2737                         mlog_errno(status);
2738         } else
2739                 ocfs2_journal_dirty(handle, di_bh);
2740
2741 bail_commit:
2742         ocfs2_commit_trans(osb, handle);
2743
2744 bail_unlock_orphan:
2745         ocfs2_inode_unlock(orphan_dir_inode, 1);
2746         inode_unlock(orphan_dir_inode);
2747         brelse(orphan_dir_bh);
2748         iput(orphan_dir_inode);
2749
2750 bail:
2751         return status;
2752 }
2753
2754 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2755                                    struct inode *inode,
2756                                    struct dentry *dentry)
2757 {
2758         int status = 0;
2759         struct buffer_head *parent_di_bh = NULL;
2760         handle_t *handle = NULL;
2761         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2762         struct ocfs2_dinode *dir_di, *di;
2763         struct inode *orphan_dir_inode = NULL;
2764         struct buffer_head *orphan_dir_bh = NULL;
2765         struct buffer_head *di_bh = NULL;
2766         struct ocfs2_dir_lookup_result lookup = { NULL, };
2767
2768         trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2769                                 dentry->d_name.len, dentry->d_name.name,
2770                                 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2771                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2772
2773         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2774         if (status < 0) {
2775                 if (status != -ENOENT)
2776                         mlog_errno(status);
2777                 return status;
2778         }
2779
2780         dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2781         if (!dir_di->i_links_count) {
2782                 /* can't make a file in a deleted directory. */
2783                 status = -ENOENT;
2784                 goto leave;
2785         }
2786
2787         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2788                                            dentry->d_name.len);
2789         if (status)
2790                 goto leave;
2791
2792         /* get a spot inside the dir. */
2793         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2794                                               dentry->d_name.name,
2795                                               dentry->d_name.len, &lookup);
2796         if (status < 0) {
2797                 mlog_errno(status);
2798                 goto leave;
2799         }
2800
2801         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2802                                                        ORPHAN_DIR_SYSTEM_INODE,
2803                                                        osb->slot_num);
2804         if (!orphan_dir_inode) {
2805                 status = -ENOENT;
2806                 mlog_errno(status);
2807                 goto leave;
2808         }
2809
2810         inode_lock(orphan_dir_inode);
2811
2812         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2813         if (status < 0) {
2814                 mlog_errno(status);
2815                 inode_unlock(orphan_dir_inode);
2816                 iput(orphan_dir_inode);
2817                 goto leave;
2818         }
2819
2820         status = ocfs2_read_inode_block(inode, &di_bh);
2821         if (status < 0) {
2822                 mlog_errno(status);
2823                 goto orphan_unlock;
2824         }
2825
2826         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2827         if (IS_ERR(handle)) {
2828                 status = PTR_ERR(handle);
2829                 handle = NULL;
2830                 mlog_errno(status);
2831                 goto orphan_unlock;
2832         }
2833
2834         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2835                                          di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2836         if (status < 0) {
2837                 mlog_errno(status);
2838                 goto out_commit;
2839         }
2840
2841         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2842                                   orphan_dir_bh, false);
2843         if (status < 0) {
2844                 mlog_errno(status);
2845                 goto out_commit;
2846         }
2847
2848         di = (struct ocfs2_dinode *)di_bh->b_data;
2849         di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2850         di->i_orphaned_slot = 0;
2851         set_nlink(inode, 1);
2852         ocfs2_set_links_count(di, inode->i_nlink);
2853         ocfs2_update_inode_fsync_trans(handle, inode, 1);
2854         ocfs2_journal_dirty(handle, di_bh);
2855
2856         status = ocfs2_add_entry(handle, dentry, inode,
2857                                  OCFS2_I(inode)->ip_blkno, parent_di_bh,
2858                                  &lookup);
2859         if (status < 0) {
2860                 mlog_errno(status);
2861                 goto out_commit;
2862         }
2863
2864         status = ocfs2_dentry_attach_lock(dentry, inode,
2865                                           OCFS2_I(dir)->ip_blkno);
2866         if (status) {
2867                 mlog_errno(status);
2868                 goto out_commit;
2869         }
2870
2871         d_instantiate(dentry, inode);
2872         status = 0;
2873 out_commit:
2874         ocfs2_commit_trans(osb, handle);
2875 orphan_unlock:
2876         ocfs2_inode_unlock(orphan_dir_inode, 1);
2877         inode_unlock(orphan_dir_inode);
2878         iput(orphan_dir_inode);
2879 leave:
2880
2881         ocfs2_inode_unlock(dir, 1);
2882
2883         brelse(di_bh);
2884         brelse(parent_di_bh);
2885         brelse(orphan_dir_bh);
2886
2887         ocfs2_free_dir_lookup_result(&lookup);
2888
2889         if (status)
2890                 mlog_errno(status);
2891
2892         return status;
2893 }
2894
2895 const struct inode_operations ocfs2_dir_iops = {
2896         .create         = ocfs2_create,
2897         .lookup         = ocfs2_lookup,
2898         .link           = ocfs2_link,
2899         .unlink         = ocfs2_unlink,
2900         .rmdir          = ocfs2_unlink,
2901         .symlink        = ocfs2_symlink,
2902         .mkdir          = ocfs2_mkdir,
2903         .mknod          = ocfs2_mknod,
2904         .rename         = ocfs2_rename,
2905         .setattr        = ocfs2_setattr,
2906         .getattr        = ocfs2_getattr,
2907         .permission     = ocfs2_permission,
2908         .listxattr      = ocfs2_listxattr,
2909         .fiemap         = ocfs2_fiemap,
2910         .get_acl        = ocfs2_iop_get_acl,
2911         .set_acl        = ocfs2_iop_set_acl,
2912 };