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 roll_back;
 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 roll_back;
 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 roll_back;
 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 roll_back;
 441         }
 442
 443         insert_inode_hash(inode);
 444         d_instantiate(dentry, inode);
 445         status = 0;
 446
 447 roll_back:
 448         if (status < 0 && S_ISDIR(mode)) {
 449                 ocfs2_add_links_count(dirfe, -1);
 450                 drop_nlink(dir);
 451         }
 452
 453 leave:
 454         if (status < 0 && did_quota_inode)
 455                 dquot_free_inode(inode);
 456         if (handle)
 457                 ocfs2_commit_trans(osb, handle);
 458
 459         ocfs2_inode_unlock(dir, 1);
 460         if (did_block_signals)
 461                 ocfs2_unblock_signals(&oldset);
 462
 463         brelse(new_fe_bh);
 464         brelse(parent_fe_bh);
 465         kfree(si.value);
 466
 467         ocfs2_free_dir_lookup_result(&lookup);
 468
 469         if (inode_ac)
 470                 ocfs2_free_alloc_context(inode_ac);
 471
 472         if (data_ac)
 473                 ocfs2_free_alloc_context(data_ac);
 474
 475         if (meta_ac)
 476                 ocfs2_free_alloc_context(meta_ac);
 477
 478         /*
 479          * We should call iput after the i_mutex of the bitmap been
 480          * unlocked in ocfs2_free_alloc_context, or the
 481          * ocfs2_delete_inode will mutex_lock again.
 482          */
 483         if ((status < 0) && inode) {
 484                 if (dl)
 485                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
 486
 487                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
 488                 clear_nlink(inode);
 489                 iput(inode);
 490         }
 491
 492         if (status)
 493                 mlog_errno(status);
 494
 495         return status;
 496 }
 497
 498 static int __ocfs2_mknod_locked(struct inode *dir,
 499                                 struct inode *inode,
 500                                 dev_t dev,
 501                                 struct buffer_head **new_fe_bh,
 502                                 struct buffer_head *parent_fe_bh,
 503                                 handle_t *handle,
 504                                 struct ocfs2_alloc_context *inode_ac,
 505                                 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
 506 {
 507         int status = 0;
 508         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 509         struct ocfs2_dinode *fe = NULL;
 510         struct ocfs2_extent_list *fel;
 511         u16 feat;
 512         struct ocfs2_inode_info *oi = OCFS2_I(inode);
 513         struct timespec64 ts;
 514
 515         *new_fe_bh = NULL;
 516
 517         /* populate as many fields early on as possible - many of
 518          * these are used by the support functions here and in
 519          * callers. */
 520         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
 521         oi->ip_blkno = fe_blkno;
 522         spin_lock(&osb->osb_lock);
 523         inode->i_generation = osb->s_next_generation++;
 524         spin_unlock(&osb->osb_lock);
 525
 526         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
 527         if (!*new_fe_bh) {
 528                 status = -ENOMEM;
 529                 mlog_errno(status);
 530                 goto leave;
 531         }
 532         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
 533
 534         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
 535                                          *new_fe_bh,
 536                                          OCFS2_JOURNAL_ACCESS_CREATE);
 537         if (status < 0) {
 538                 mlog_errno(status);
 539                 goto leave;
 540         }
 541
 542         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
 543         memset(fe, 0, osb->sb->s_blocksize);
 544
 545         fe->i_generation = cpu_to_le32(inode->i_generation);
 546         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
 547         fe->i_blkno = cpu_to_le64(fe_blkno);
 548         fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
 549         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
 550         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
 551         fe->i_uid = cpu_to_le32(i_uid_read(inode));
 552         fe->i_gid = cpu_to_le32(i_gid_read(inode));
 553         fe->i_mode = cpu_to_le16(inode->i_mode);
 554         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 555                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
 556
 557         ocfs2_set_links_count(fe, inode->i_nlink);
 558
 559         fe->i_last_eb_blk = 0;
 560         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 561         fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
 562         ktime_get_real_ts64(&ts);
 563         fe->i_atime = fe->i_ctime = fe->i_mtime =
 564                 cpu_to_le64(ts.tv_sec);
 565         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
 566                 cpu_to_le32(ts.tv_nsec);
 567         fe->i_dtime = 0;
 568
 569         /*
 570          * If supported, directories start with inline data. If inline
 571          * isn't supported, but indexing is, we start them as indexed.
 572          */
 573         feat = le16_to_cpu(fe->i_dyn_features);
 574         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
 575                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
 576
 577                 fe->id2.i_data.id_count = cpu_to_le16(
 578                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
 579         } else {
 580                 fel = &fe->id2.i_list;
 581                 fel->l_tree_depth = 0;
 582                 fel->l_next_free_rec = 0;
 583                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
 584         }
 585
 586         ocfs2_journal_dirty(handle, *new_fe_bh);
 587
 588         ocfs2_populate_inode(inode, fe, 1);
 589         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
 590         if (!ocfs2_mount_local(osb)) {
 591                 status = ocfs2_create_new_inode_locks(inode);
 592                 if (status < 0)
 593                         mlog_errno(status);
 594         }
 595
 596         ocfs2_update_inode_fsync_trans(handle, inode, 1);
 597
 598 leave:
 599         if (status < 0) {
 600                 if (*new_fe_bh) {
 601                         brelse(*new_fe_bh);
 602                         *new_fe_bh = NULL;
 603                 }
 604         }
 605
 606         if (status)
 607                 mlog_errno(status);
 608         return status;
 609 }
 610
 611 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 612                               struct inode *dir,
 613                               struct inode *inode,
 614                               dev_t dev,
 615                               struct buffer_head **new_fe_bh,
 616                               struct buffer_head *parent_fe_bh,
 617                               handle_t *handle,
 618                               struct ocfs2_alloc_context *inode_ac)
 619 {
 620         int status = 0;
 621         u64 suballoc_loc, fe_blkno = 0;
 622         u16 suballoc_bit;
 623
 624         *new_fe_bh = NULL;
 625
 626         status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
 627                                        inode_ac, &suballoc_loc,
 628                                        &suballoc_bit, &fe_blkno);
 629         if (status < 0) {
 630                 mlog_errno(status);
 631                 return status;
 632         }
 633
 634         status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
 635                                     parent_fe_bh, handle, inode_ac,
 636                                     fe_blkno, suballoc_loc, suballoc_bit);
 637         if (status < 0) {
 638                 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit);
 639                 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode,
 640                                 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1);
 641                 if (tmp)
 642                         mlog_errno(tmp);
 643         }
 644
 645         return status;
 646 }
 647
 648 static int ocfs2_mkdir(struct inode *dir,
 649                        struct dentry *dentry,
 650                        umode_t mode)
 651 {
 652         int ret;
 653
 654         trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 655                           OCFS2_I(dir)->ip_blkno, mode);
 656         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
 657         if (ret)
 658                 mlog_errno(ret);
 659
 660         return ret;
 661 }
 662
 663 static int ocfs2_create(struct inode *dir,
 664                         struct dentry *dentry,
 665                         umode_t mode,
 666                         bool excl)
 667 {
 668         int ret;
 669
 670         trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 671                            (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
 672         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
 673         if (ret)
 674                 mlog_errno(ret);
 675
 676         return ret;
 677 }
 678
 679 static int ocfs2_link(struct dentry *old_dentry,
 680                       struct inode *dir,
 681                       struct dentry *dentry)
 682 {
 683         handle_t *handle;
 684         struct inode *inode = d_inode(old_dentry);
 685         struct inode *old_dir = d_inode(old_dentry->d_parent);
 686         int err;
 687         struct buffer_head *fe_bh = NULL;
 688         struct buffer_head *old_dir_bh = NULL;
 689         struct buffer_head *parent_fe_bh = NULL;
 690         struct ocfs2_dinode *fe = NULL;
 691         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 692         struct ocfs2_dir_lookup_result lookup = { NULL, };
 693         sigset_t oldset;
 694         u64 old_de_ino;
 695
 696         trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
 697                          old_dentry->d_name.len, old_dentry->d_name.name,
 698                          dentry->d_name.len, dentry->d_name.name);
 699
 700         if (S_ISDIR(inode->i_mode))
 701                 return -EPERM;
 702
 703         err = dquot_initialize(dir);
 704         if (err) {
 705                 mlog_errno(err);
 706                 return err;
 707         }
 708
 709         err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
 710                         &parent_fe_bh, dir, 0);
 711         if (err < 0) {
 712                 if (err != -ENOENT)
 713                         mlog_errno(err);
 714                 return err;
 715         }
 716
 717         /* make sure both dirs have bhs
 718          * get an extra ref on old_dir_bh if old==new */
 719         if (!parent_fe_bh) {
 720                 if (old_dir_bh) {
 721                         parent_fe_bh = old_dir_bh;
 722                         get_bh(parent_fe_bh);
 723                 } else {
 724                         mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
 725                         err = -EIO;
 726                         goto out;
 727                 }
 728         }
 729
 730         if (!dir->i_nlink) {
 731                 err = -ENOENT;
 732                 goto out;
 733         }
 734
 735         err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
 736                         old_dentry->d_name.len, &old_de_ino);
 737         if (err) {
 738                 err = -ENOENT;
 739                 goto out;
 740         }
 741
 742         /*
 743          * Check whether another node removed the source inode while we
 744          * were in the vfs.
 745          */
 746         if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
 747                 err = -ENOENT;
 748                 goto out;
 749         }
 750
 751         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 752                                         dentry->d_name.len);
 753         if (err)
 754                 goto out;
 755
 756         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 757                                            dentry->d_name.name,
 758                                            dentry->d_name.len, &lookup);
 759         if (err < 0) {
 760                 mlog_errno(err);
 761                 goto out;
 762         }
 763
 764         err = ocfs2_inode_lock(inode, &fe_bh, 1);
 765         if (err < 0) {
 766                 if (err != -ENOENT)
 767                         mlog_errno(err);
 768                 goto out;
 769         }
 770
 771         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 772         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
 773                 err = -EMLINK;
 774                 goto out_unlock_inode;
 775         }
 776
 777         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
 778         if (IS_ERR(handle)) {
 779                 err = PTR_ERR(handle);
 780                 handle = NULL;
 781                 mlog_errno(err);
 782                 goto out_unlock_inode;
 783         }
 784
 785         /* Starting to change things, restart is no longer possible. */
 786         ocfs2_block_signals(&oldset);
 787
 788         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 789                                       OCFS2_JOURNAL_ACCESS_WRITE);
 790         if (err < 0) {
 791                 mlog_errno(err);
 792                 goto out_commit;
 793         }
 794
 795         inc_nlink(inode);
 796         inode->i_ctime = current_time(inode);
 797         ocfs2_set_links_count(fe, inode->i_nlink);
 798         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 799         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 800         ocfs2_journal_dirty(handle, fe_bh);
 801
 802         err = ocfs2_add_entry(handle, dentry, inode,
 803                               OCFS2_I(inode)->ip_blkno,
 804                               parent_fe_bh, &lookup);
 805         if (err) {
 806                 ocfs2_add_links_count(fe, -1);
 807                 drop_nlink(inode);
 808                 mlog_errno(err);
 809                 goto out_commit;
 810         }
 811
 812         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
 813         if (err) {
 814                 mlog_errno(err);
 815                 goto out_commit;
 816         }
 817
 818         ihold(inode);
 819         d_instantiate(dentry, inode);
 820
 821 out_commit:
 822         ocfs2_commit_trans(osb, handle);
 823         ocfs2_unblock_signals(&oldset);
 824 out_unlock_inode:
 825         ocfs2_inode_unlock(inode, 1);
 826
 827 out:
 828         ocfs2_double_unlock(old_dir, dir);
 829
 830         brelse(fe_bh);
 831         brelse(parent_fe_bh);
 832         brelse(old_dir_bh);
 833
 834         ocfs2_free_dir_lookup_result(&lookup);
 835
 836         if (err)
 837                 mlog_errno(err);
 838
 839         return err;
 840 }
 841
 842 /*
 843  * Takes and drops an exclusive lock on the given dentry. This will
 844  * force other nodes to drop it.
 845  */
 846 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 847 {
 848         int ret;
 849
 850         ret = ocfs2_dentry_lock(dentry, 1);
 851         if (ret)
 852                 mlog_errno(ret);
 853         else
 854                 ocfs2_dentry_unlock(dentry, 1);
 855
 856         return ret;
 857 }
 858
 859 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
 860 {
 861         if (S_ISDIR(inode->i_mode)) {
 862                 if (inode->i_nlink == 2)
 863                         return 1;
 864                 return 0;
 865         }
 866
 867         if (inode->i_nlink == 1)
 868                 return 1;
 869         return 0;
 870 }
 871
 872 static int ocfs2_unlink(struct inode *dir,
 873                         struct dentry *dentry)
 874 {
 875         int status;
 876         int child_locked = 0;
 877         bool is_unlinkable = false;
 878         struct inode *inode = d_inode(dentry);
 879         struct inode *orphan_dir = NULL;
 880         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 881         u64 blkno;
 882         struct ocfs2_dinode *fe = NULL;
 883         struct buffer_head *fe_bh = NULL;
 884         struct buffer_head *parent_node_bh = NULL;
 885         handle_t *handle = NULL;
 886         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 887         struct ocfs2_dir_lookup_result lookup = { NULL, };
 888         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
 889
 890         trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
 891                            dentry->d_name.name,
 892                            (unsigned long long)OCFS2_I(dir)->ip_blkno,
 893                            (unsigned long long)OCFS2_I(inode)->ip_blkno);
 894
 895         status = dquot_initialize(dir);
 896         if (status) {
 897                 mlog_errno(status);
 898                 return status;
 899         }
 900
 901         BUG_ON(d_inode(dentry->d_parent) != dir);
 902
 903         if (inode == osb->root_inode)
 904                 return -EPERM;
 905
 906         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
 907                                          OI_LS_PARENT);
 908         if (status < 0) {
 909                 if (status != -ENOENT)
 910                         mlog_errno(status);
 911                 return status;
 912         }
 913
 914         status = ocfs2_find_files_on_disk(dentry->d_name.name,
 915                                           dentry->d_name.len, &blkno, dir,
 916                                           &lookup);
 917         if (status < 0) {
 918                 if (status != -ENOENT)
 919                         mlog_errno(status);
 920                 goto leave;
 921         }
 922
 923         if (OCFS2_I(inode)->ip_blkno != blkno) {
 924                 status = -ENOENT;
 925
 926                 trace_ocfs2_unlink_noent(
 927                                 (unsigned long long)OCFS2_I(inode)->ip_blkno,
 928                                 (unsigned long long)blkno,
 929                                 OCFS2_I(inode)->ip_flags);
 930                 goto leave;
 931         }
 932
 933         status = ocfs2_inode_lock(inode, &fe_bh, 1);
 934         if (status < 0) {
 935                 if (status != -ENOENT)
 936                         mlog_errno(status);
 937                 goto leave;
 938         }
 939         child_locked = 1;
 940
 941         if (S_ISDIR(inode->i_mode)) {
 942                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
 943                         status = -ENOTEMPTY;
 944                         goto leave;
 945                 }
 946         }
 947
 948         status = ocfs2_remote_dentry_delete(dentry);
 949         if (status < 0) {
 950                 /* This remote delete should succeed under all normal
 951                  * circumstances. */
 952                 mlog_errno(status);
 953                 goto leave;
 954         }
 955
 956         if (ocfs2_inode_is_unlinkable(inode)) {
 957                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
 958                                                   OCFS2_I(inode)->ip_blkno,
 959                                                   orphan_name, &orphan_insert,
 960                                                   false);
 961                 if (status < 0) {
 962                         mlog_errno(status);
 963                         goto leave;
 964                 }
 965                 is_unlinkable = true;
 966         }
 967
 968         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
 969         if (IS_ERR(handle)) {
 970                 status = PTR_ERR(handle);
 971                 handle = NULL;
 972                 mlog_errno(status);
 973                 goto leave;
 974         }
 975
 976         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 977                                          OCFS2_JOURNAL_ACCESS_WRITE);
 978         if (status < 0) {
 979                 mlog_errno(status);
 980                 goto leave;
 981         }
 982
 983         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 984
 985         /* delete the name from the parent dir */
 986         status = ocfs2_delete_entry(handle, dir, &lookup);
 987         if (status < 0) {
 988                 mlog_errno(status);
 989                 goto leave;
 990         }
 991
 992         if (S_ISDIR(inode->i_mode))
 993                 drop_nlink(inode);
 994         drop_nlink(inode);
 995         ocfs2_set_links_count(fe, inode->i_nlink);
 996         ocfs2_journal_dirty(handle, fe_bh);
 997
 998         dir->i_ctime = dir->i_mtime = current_time(dir);
 999         if (S_ISDIR(inode->i_mode))
1000                 drop_nlink(dir);
1001
1002         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1003         if (status < 0) {
1004                 mlog_errno(status);
1005                 if (S_ISDIR(inode->i_mode))
1006                         inc_nlink(dir);
1007                 goto leave;
1008         }
1009
1010         if (is_unlinkable) {
1011                 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1012                                 orphan_name, &orphan_insert, orphan_dir, false);
1013                 if (status < 0)
1014                         mlog_errno(status);
1015         }
1016
1017 leave:
1018         if (handle)
1019                 ocfs2_commit_trans(osb, handle);
1020
1021         if (orphan_dir) {
1022                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1023                 ocfs2_inode_unlock(orphan_dir, 1);
1024                 inode_unlock(orphan_dir);
1025                 iput(orphan_dir);
1026         }
1027
1028         if (child_locked)
1029                 ocfs2_inode_unlock(inode, 1);
1030
1031         ocfs2_inode_unlock(dir, 1);
1032
1033         brelse(fe_bh);
1034         brelse(parent_node_bh);
1035
1036         ocfs2_free_dir_lookup_result(&orphan_insert);
1037         ocfs2_free_dir_lookup_result(&lookup);
1038
1039         if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1040                 mlog_errno(status);
1041
1042         return status;
1043 }
1044
1045 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1046                 u64 src_inode_no, u64 dest_inode_no)
1047 {
1048         int ret = 0, i = 0;
1049         u64 parent_inode_no = 0;
1050         u64 child_inode_no = src_inode_no;
1051         struct inode *child_inode;
1052
1053 #define MAX_LOOKUP_TIMES 32
1054         while (1) {
1055                 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1056                 if (IS_ERR(child_inode)) {
1057                         ret = PTR_ERR(child_inode);
1058                         break;
1059                 }
1060
1061                 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1062                 if (ret < 0) {
1063                         iput(child_inode);
1064                         if (ret != -ENOENT)
1065                                 mlog_errno(ret);
1066                         break;
1067                 }
1068
1069                 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1070                                 &parent_inode_no);
1071                 ocfs2_inode_unlock(child_inode, 0);
1072                 iput(child_inode);
1073                 if (ret < 0) {
1074                         ret = -ENOENT;
1075                         break;
1076                 }
1077
1078                 if (parent_inode_no == dest_inode_no) {
1079                         ret = 1;
1080                         break;
1081                 }
1082
1083                 if (parent_inode_no == osb->root_inode->i_ino) {
1084                         ret = 0;
1085                         break;
1086                 }
1087
1088                 child_inode_no = parent_inode_no;
1089
1090                 if (++i >= MAX_LOOKUP_TIMES) {
1091                         mlog_ratelimited(ML_NOTICE, "max lookup times reached, "
1092                                         "filesystem may have nested directories, "
1093                                         "src inode: %llu, dest inode: %llu.\n",
1094                                         (unsigned long long)src_inode_no,
1095                                         (unsigned long long)dest_inode_no);
1096                         ret = 0;
1097                         break;
1098                 }
1099         }
1100
1101         return ret;
1102 }
1103
1104 /*
1105  * The only place this should be used is rename and link!
1106  * if they have the same id, then the 1st one is the only one locked.
1107  */
1108 static int ocfs2_double_lock(struct ocfs2_super *osb,
1109                              struct buffer_head **bh1,
1110                              struct inode *inode1,
1111                              struct buffer_head **bh2,
1112                              struct inode *inode2,
1113                              int rename)
1114 {
1115         int status;
1116         int inode1_is_ancestor, inode2_is_ancestor;
1117         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1118         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1119
1120         trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1121                                 (unsigned long long)oi2->ip_blkno);
1122
1123         if (*bh1)
1124                 *bh1 = NULL;
1125         if (*bh2)
1126                 *bh2 = NULL;
1127
1128         /* we always want to lock the one with the lower lockid first.
1129          * and if they are nested, we lock ancestor first */
1130         if (oi1->ip_blkno != oi2->ip_blkno) {
1131                 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1132                                 oi1->ip_blkno);
1133                 if (inode1_is_ancestor < 0) {
1134                         status = inode1_is_ancestor;
1135                         goto bail;
1136                 }
1137
1138                 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1139                                 oi2->ip_blkno);
1140                 if (inode2_is_ancestor < 0) {
1141                         status = inode2_is_ancestor;
1142                         goto bail;
1143                 }
1144
1145                 if ((inode1_is_ancestor == 1) ||
1146                                 (oi1->ip_blkno < oi2->ip_blkno &&
1147                                 inode2_is_ancestor == 0)) {
1148                         /* switch id1 and id2 around */
1149                         swap(bh2, bh1);
1150                         swap(inode2, inode1);
1151                 }
1152                 /* lock id2 */
1153                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1154                                 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1155                 if (status < 0) {
1156                         if (status != -ENOENT)
1157                                 mlog_errno(status);
1158                         goto bail;
1159                 }
1160         }
1161
1162         /* lock id1 */
1163         status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1164                         rename == 1 ?  OI_LS_RENAME2 : OI_LS_PARENT);
1165         if (status < 0) {
1166                 /*
1167                  * An error return must mean that no cluster locks
1168                  * were held on function exit.
1169                  */
1170                 if (oi1->ip_blkno != oi2->ip_blkno) {
1171                         ocfs2_inode_unlock(inode2, 1);
1172                         brelse(*bh2);
1173                         *bh2 = NULL;
1174                 }
1175
1176                 if (status != -ENOENT)
1177                         mlog_errno(status);
1178         }
1179
1180         trace_ocfs2_double_lock_end(
1181                         (unsigned long long)oi1->ip_blkno,
1182                         (unsigned long long)oi2->ip_blkno);
1183
1184 bail:
1185         if (status)
1186                 mlog_errno(status);
1187         return status;
1188 }
1189
1190 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1191 {
1192         ocfs2_inode_unlock(inode1, 1);
1193
1194         if (inode1 != inode2)
1195                 ocfs2_inode_unlock(inode2, 1);
1196 }
1197
1198 static int ocfs2_rename(struct inode *old_dir,
1199                         struct dentry *old_dentry,
1200                         struct inode *new_dir,
1201                         struct dentry *new_dentry,
1202                         unsigned int flags)
1203 {
1204         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1205         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1206         struct inode *old_inode = d_inode(old_dentry);
1207         struct inode *new_inode = d_inode(new_dentry);
1208         struct inode *orphan_dir = NULL;
1209         struct ocfs2_dinode *newfe = NULL;
1210         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1211         struct buffer_head *newfe_bh = NULL;
1212         struct buffer_head *old_inode_bh = NULL;
1213         struct ocfs2_super *osb = NULL;
1214         u64 newfe_blkno, old_de_ino;
1215         handle_t *handle = NULL;
1216         struct buffer_head *old_dir_bh = NULL;
1217         struct buffer_head *new_dir_bh = NULL;
1218         u32 old_dir_nlink = old_dir->i_nlink;
1219         struct ocfs2_dinode *old_di;
1220         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1221         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1222         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1223         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1224         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1225         bool should_add_orphan = false;
1226
1227         if (flags)
1228                 return -EINVAL;
1229
1230         /* At some point it might be nice to break this function up a
1231          * bit. */
1232
1233         trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1234                            old_dentry->d_name.len, old_dentry->d_name.name,
1235                            new_dentry->d_name.len, new_dentry->d_name.name);
1236
1237         status = dquot_initialize(old_dir);
1238         if (status) {
1239                 mlog_errno(status);
1240                 goto bail;
1241         }
1242         status = dquot_initialize(new_dir);
1243         if (status) {
1244                 mlog_errno(status);
1245                 goto bail;
1246         }
1247
1248         osb = OCFS2_SB(old_dir->i_sb);
1249
1250         if (new_inode) {
1251                 if (!igrab(new_inode))
1252                         BUG();
1253         }
1254
1255         /* Assume a directory hierarchy thusly:
1256          * a/b/c
1257          * a/d
1258          * a,b,c, and d are all directories.
1259          *
1260          * from cwd of 'a' on both nodes:
1261          * node1: mv b/c d
1262          * node2: mv d   b/c
1263          *
1264          * And that's why, just like the VFS, we need a file system
1265          * rename lock. */
1266         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1267                 status = ocfs2_rename_lock(osb);
1268                 if (status < 0) {
1269                         mlog_errno(status);
1270                         goto bail;
1271                 }
1272                 rename_lock = 1;
1273
1274                 /* here we cannot guarantee the inodes haven't just been
1275                  * changed, so check if they are nested again */
1276                 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1277                                 old_inode->i_ino);
1278                 if (status < 0) {
1279                         mlog_errno(status);
1280                         goto bail;
1281                 } else if (status == 1) {
1282                         status = -EPERM;
1283                         trace_ocfs2_rename_not_permitted(
1284                                         (unsigned long long)old_inode->i_ino,
1285                                         (unsigned long long)new_dir->i_ino);
1286                         goto bail;
1287                 }
1288         }
1289
1290         /* if old and new are the same, this'll just do one lock. */
1291         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1292                                    &new_dir_bh, new_dir, 1);
1293         if (status < 0) {
1294                 mlog_errno(status);
1295                 goto bail;
1296         }
1297         parents_locked = 1;
1298
1299         if (!new_dir->i_nlink) {
1300                 status = -EACCES;
1301                 goto bail;
1302         }
1303
1304         /* make sure both dirs have bhs
1305          * get an extra ref on old_dir_bh if old==new */
1306         if (!new_dir_bh) {
1307                 if (old_dir_bh) {
1308                         new_dir_bh = old_dir_bh;
1309                         get_bh(new_dir_bh);
1310                 } else {
1311                         mlog(ML_ERROR, "no old_dir_bh!\n");
1312                         status = -EIO;
1313                         goto bail;
1314                 }
1315         }
1316
1317         /*
1318          * Aside from allowing a meta data update, the locking here
1319          * also ensures that the downconvert thread on other nodes
1320          * won't have to concurrently downconvert the inode and the
1321          * dentry locks.
1322          */
1323         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1324                                          OI_LS_PARENT);
1325         if (status < 0) {
1326                 if (status != -ENOENT)
1327                         mlog_errno(status);
1328                 goto bail;
1329         }
1330         old_child_locked = 1;
1331
1332         status = ocfs2_remote_dentry_delete(old_dentry);
1333         if (status < 0) {
1334                 mlog_errno(status);
1335                 goto bail;
1336         }
1337
1338         if (S_ISDIR(old_inode->i_mode)) {
1339                 u64 old_inode_parent;
1340
1341                 update_dot_dot = 1;
1342                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1343                                                   old_inode,
1344                                                   &old_inode_dot_dot_res);
1345                 if (status) {
1346                         status = -EIO;
1347                         goto bail;
1348                 }
1349
1350                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1351                         status = -EIO;
1352                         goto bail;
1353                 }
1354
1355                 if (!new_inode && new_dir != old_dir &&
1356                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1357                         status = -EMLINK;
1358                         goto bail;
1359                 }
1360         }
1361
1362         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1363                                             old_dentry->d_name.len,
1364                                             &old_de_ino);
1365         if (status) {
1366                 status = -ENOENT;
1367                 goto bail;
1368         }
1369
1370         /*
1371          *  Check for inode number is _not_ due to possible IO errors.
1372          *  We might rmdir the source, keep it as pwd of some process
1373          *  and merrily kill the link to whatever was created under the
1374          *  same name. Goodbye sticky bit ;-<
1375          */
1376         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1377                 status = -ENOENT;
1378                 goto bail;
1379         }
1380
1381         /* check if the target already exists (in which case we need
1382          * to delete it */
1383         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1384                                           new_dentry->d_name.len,
1385                                           &newfe_blkno, new_dir,
1386                                           &target_lookup_res);
1387         /* The only error we allow here is -ENOENT because the new
1388          * file not existing is perfectly valid. */
1389         if ((status < 0) && (status != -ENOENT)) {
1390                 /* If we cannot find the file specified we should just */
1391                 /* return the error... */
1392                 mlog_errno(status);
1393                 goto bail;
1394         }
1395         if (status == 0)
1396                 target_exists = 1;
1397
1398         if (!target_exists && new_inode) {
1399                 /*
1400                  * Target was unlinked by another node while we were
1401                  * waiting to get to ocfs2_rename(). There isn't
1402                  * anything we can do here to help the situation, so
1403                  * bubble up the appropriate error.
1404                  */
1405                 status = -ENOENT;
1406                 goto bail;
1407         }
1408
1409         /* In case we need to overwrite an existing file, we blow it
1410          * away first */
1411         if (target_exists) {
1412                 /* VFS didn't think there existed an inode here, but
1413                  * someone else in the cluster must have raced our
1414                  * rename to create one. Today we error cleanly, in
1415                  * the future we should consider calling iget to build
1416                  * a new struct inode for this entry. */
1417                 if (!new_inode) {
1418                         status = -EACCES;
1419
1420                         trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1421                                                 new_dentry->d_name.name);
1422                         goto bail;
1423                 }
1424
1425                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1426                         status = -EACCES;
1427
1428                         trace_ocfs2_rename_disagree(
1429                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1430                              (unsigned long long)newfe_blkno,
1431                              OCFS2_I(new_inode)->ip_flags);
1432                         goto bail;
1433                 }
1434
1435                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1436                 if (status < 0) {
1437                         if (status != -ENOENT)
1438                                 mlog_errno(status);
1439                         goto bail;
1440                 }
1441                 new_child_locked = 1;
1442
1443                 status = ocfs2_remote_dentry_delete(new_dentry);
1444                 if (status < 0) {
1445                         mlog_errno(status);
1446                         goto bail;
1447                 }
1448
1449                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1450
1451                 trace_ocfs2_rename_over_existing(
1452                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1453                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1454
1455                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1456                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1457                                                 OCFS2_I(new_inode)->ip_blkno,
1458                                                 orphan_name, &orphan_insert,
1459                                                 false);
1460                         if (status < 0) {
1461                                 mlog_errno(status);
1462                                 goto bail;
1463                         }
1464                         should_add_orphan = true;
1465                 }
1466         } else {
1467                 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1468
1469                 status = ocfs2_check_dir_for_entry(new_dir,
1470                                                    new_dentry->d_name.name,
1471                                                    new_dentry->d_name.len);
1472                 if (status)
1473                         goto bail;
1474
1475                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1476                                                       new_dentry->d_name.name,
1477                                                       new_dentry->d_name.len,
1478                                                       &target_insert);
1479                 if (status < 0) {
1480                         mlog_errno(status);
1481                         goto bail;
1482                 }
1483         }
1484
1485         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1486         if (IS_ERR(handle)) {
1487                 status = PTR_ERR(handle);
1488                 handle = NULL;
1489                 mlog_errno(status);
1490                 goto bail;
1491         }
1492
1493         if (target_exists) {
1494                 if (S_ISDIR(new_inode->i_mode)) {
1495                         if (new_inode->i_nlink != 2 ||
1496                             !ocfs2_empty_dir(new_inode)) {
1497                                 status = -ENOTEMPTY;
1498                                 goto bail;
1499                         }
1500                 }
1501                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1502                                                  newfe_bh,
1503                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1504                 if (status < 0) {
1505                         mlog_errno(status);
1506                         goto bail;
1507                 }
1508
1509                 /* change the dirent to point to the correct inode */
1510                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1511                                             old_inode);
1512                 if (status < 0) {
1513                         mlog_errno(status);
1514                         goto bail;
1515                 }
1516                 inode_inc_iversion(new_dir);
1517
1518                 if (S_ISDIR(new_inode->i_mode))
1519                         ocfs2_set_links_count(newfe, 0);
1520                 else
1521                         ocfs2_add_links_count(newfe, -1);
1522                 ocfs2_journal_dirty(handle, newfe_bh);
1523                 if (should_add_orphan) {
1524                         status = ocfs2_orphan_add(osb, handle, new_inode,
1525                                         newfe_bh, orphan_name,
1526                                         &orphan_insert, orphan_dir, false);
1527                         if (status < 0) {
1528                                 mlog_errno(status);
1529                                 goto bail;
1530                         }
1531                 }
1532         } else {
1533                 /* if the name was not found in new_dir, add it now */
1534                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1535                                          OCFS2_I(old_inode)->ip_blkno,
1536                                          new_dir_bh, &target_insert);
1537         }
1538
1539         old_inode->i_ctime = current_time(old_inode);
1540         mark_inode_dirty(old_inode);
1541
1542         status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1543                                          old_inode_bh,
1544                                          OCFS2_JOURNAL_ACCESS_WRITE);
1545         if (status >= 0) {
1546                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1547
1548                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1549                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1550                 ocfs2_journal_dirty(handle, old_inode_bh);
1551         } else
1552                 mlog_errno(status);
1553
1554         /*
1555          * Now that the name has been added to new_dir, remove the old name.
1556          *
1557          * We don't keep any directory entry context around until now
1558          * because the insert might have changed the type of directory
1559          * we're dealing with.
1560          */
1561         status = ocfs2_find_entry(old_dentry->d_name.name,
1562                                   old_dentry->d_name.len, old_dir,
1563                                   &old_entry_lookup);
1564         if (status) {
1565                 if (!is_journal_aborted(osb->journal->j_journal)) {
1566                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1567                                         "is not deleted.",
1568                                         new_dentry->d_name.len, new_dentry->d_name.name,
1569                                         old_dentry->d_name.len, old_dentry->d_name.name);
1570                 }
1571                 goto bail;
1572         }
1573
1574         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1575         if (status < 0) {
1576                 mlog_errno(status);
1577                 if (!is_journal_aborted(osb->journal->j_journal)) {
1578                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1579                                         "is not deleted.",
1580                                         new_dentry->d_name.len, new_dentry->d_name.name,
1581                                         old_dentry->d_name.len, old_dentry->d_name.name);
1582                 }
1583                 goto bail;
1584         }
1585
1586         if (new_inode) {
1587                 drop_nlink(new_inode);
1588                 new_inode->i_ctime = current_time(new_inode);
1589         }
1590         old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
1591
1592         if (update_dot_dot) {
1593                 status = ocfs2_update_entry(old_inode, handle,
1594                                             &old_inode_dot_dot_res, new_dir);
1595                 drop_nlink(old_dir);
1596                 if (new_inode) {
1597                         drop_nlink(new_inode);
1598                 } else {
1599                         inc_nlink(new_dir);
1600                         mark_inode_dirty(new_dir);
1601                 }
1602         }
1603         mark_inode_dirty(old_dir);
1604         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1605         if (new_inode) {
1606                 mark_inode_dirty(new_inode);
1607                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1608         }
1609
1610         if (old_dir != new_dir) {
1611                 /* Keep the same times on both directories.*/
1612                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1613
1614                 /*
1615                  * This will also pick up the i_nlink change from the
1616                  * block above.
1617                  */
1618                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1619         }
1620
1621         if (old_dir_nlink != old_dir->i_nlink) {
1622                 if (!old_dir_bh) {
1623                         mlog(ML_ERROR, "need to change nlink for old dir "
1624                              "%llu from %d to %d but bh is NULL!\n",
1625                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1626                              (int)old_dir_nlink, old_dir->i_nlink);
1627                 } else {
1628                         struct ocfs2_dinode *fe;
1629                         status = ocfs2_journal_access_di(handle,
1630                                                          INODE_CACHE(old_dir),
1631                                                          old_dir_bh,
1632                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1633                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1634                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1635                         ocfs2_journal_dirty(handle, old_dir_bh);
1636                 }
1637         }
1638         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1639         status = 0;
1640 bail:
1641         if (handle)
1642                 ocfs2_commit_trans(osb, handle);
1643
1644         if (orphan_dir) {
1645                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1646                 ocfs2_inode_unlock(orphan_dir, 1);
1647                 inode_unlock(orphan_dir);
1648                 iput(orphan_dir);
1649         }
1650
1651         if (new_child_locked)
1652                 ocfs2_inode_unlock(new_inode, 1);
1653
1654         if (old_child_locked)
1655                 ocfs2_inode_unlock(old_inode, 1);
1656
1657         if (parents_locked)
1658                 ocfs2_double_unlock(old_dir, new_dir);
1659
1660         if (rename_lock)
1661                 ocfs2_rename_unlock(osb);
1662
1663         if (new_inode)
1664                 sync_mapping_buffers(old_inode->i_mapping);
1665
1666         iput(new_inode);
1667
1668         ocfs2_free_dir_lookup_result(&target_lookup_res);
1669         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1670         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1671         ocfs2_free_dir_lookup_result(&orphan_insert);
1672         ocfs2_free_dir_lookup_result(&target_insert);
1673
1674         brelse(newfe_bh);
1675         brelse(old_inode_bh);
1676         brelse(old_dir_bh);
1677         brelse(new_dir_bh);
1678
1679         if (status)
1680                 mlog_errno(status);
1681
1682         return status;
1683 }
1684
1685 /*
1686  * we expect i_size = strlen(symname). Copy symname into the file
1687  * data, including the null terminator.
1688  */
1689 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1690                                      handle_t *handle,
1691                                      struct inode *inode,
1692                                      const char *symname)
1693 {
1694         struct buffer_head **bhs = NULL;
1695         const char *c;
1696         struct super_block *sb = osb->sb;
1697         u64 p_blkno, p_blocks;
1698         int virtual, blocks, status, i, bytes_left;
1699
1700         bytes_left = i_size_read(inode) + 1;
1701         /* we can't trust i_blocks because we're actually going to
1702          * write i_size + 1 bytes. */
1703         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1704
1705         trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1706                                         i_size_read(inode), blocks);
1707
1708         /* Sanity check -- make sure we're going to fit. */
1709         if (bytes_left >
1710             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1711                 status = -EIO;
1712                 mlog_errno(status);
1713                 goto bail;
1714         }
1715
1716         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1717         if (!bhs) {
1718                 status = -ENOMEM;
1719                 mlog_errno(status);
1720                 goto bail;
1721         }
1722
1723         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1724                                              NULL);
1725         if (status < 0) {
1726                 mlog_errno(status);
1727                 goto bail;
1728         }
1729
1730         /* links can never be larger than one cluster so we know this
1731          * is all going to be contiguous, but do a sanity check
1732          * anyway. */
1733         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1734                 status = -EIO;
1735                 mlog_errno(status);
1736                 goto bail;
1737         }
1738
1739         virtual = 0;
1740         while(bytes_left > 0) {
1741                 c = &symname[virtual * sb->s_blocksize];
1742
1743                 bhs[virtual] = sb_getblk(sb, p_blkno);
1744                 if (!bhs[virtual]) {
1745                         status = -ENOMEM;
1746                         mlog_errno(status);
1747                         goto bail;
1748                 }
1749                 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1750                                               bhs[virtual]);
1751
1752                 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1753                                               bhs[virtual],
1754                                               OCFS2_JOURNAL_ACCESS_CREATE);
1755                 if (status < 0) {
1756                         mlog_errno(status);
1757                         goto bail;
1758                 }
1759
1760                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1761
1762                 memcpy(bhs[virtual]->b_data, c,
1763                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1764                        bytes_left);
1765
1766                 ocfs2_journal_dirty(handle, bhs[virtual]);
1767
1768                 virtual++;
1769                 p_blkno++;
1770                 bytes_left -= sb->s_blocksize;
1771         }
1772
1773         status = 0;
1774 bail:
1775
1776         if (bhs) {
1777                 for(i = 0; i < blocks; i++)
1778                         brelse(bhs[i]);
1779                 kfree(bhs);
1780         }
1781
1782         if (status)
1783                 mlog_errno(status);
1784         return status;
1785 }
1786
1787 static int ocfs2_symlink(struct inode *dir,
1788                          struct dentry *dentry,
1789                          const char *symname)
1790 {
1791         int status, l, credits;
1792         u64 newsize;
1793         struct ocfs2_super *osb = NULL;
1794         struct inode *inode = NULL;
1795         struct super_block *sb;
1796         struct buffer_head *new_fe_bh = NULL;
1797         struct buffer_head *parent_fe_bh = NULL;
1798         struct ocfs2_dinode *fe = NULL;
1799         struct ocfs2_dinode *dirfe;
1800         handle_t *handle = NULL;
1801         struct ocfs2_alloc_context *inode_ac = NULL;
1802         struct ocfs2_alloc_context *data_ac = NULL;
1803         struct ocfs2_alloc_context *xattr_ac = NULL;
1804         int want_clusters = 0;
1805         int xattr_credits = 0;
1806         struct ocfs2_security_xattr_info si = {
1807                 .enable = 1,
1808         };
1809         int did_quota = 0, did_quota_inode = 0;
1810         struct ocfs2_dir_lookup_result lookup = { NULL, };
1811         sigset_t oldset;
1812         int did_block_signals = 0;
1813         struct ocfs2_dentry_lock *dl = NULL;
1814
1815         trace_ocfs2_symlink_begin(dir, dentry, symname,
1816                                   dentry->d_name.len, dentry->d_name.name);
1817
1818         status = dquot_initialize(dir);
1819         if (status) {
1820                 mlog_errno(status);
1821                 goto bail;
1822         }
1823
1824         sb = dir->i_sb;
1825         osb = OCFS2_SB(sb);
1826
1827         l = strlen(symname) + 1;
1828
1829         credits = ocfs2_calc_symlink_credits(sb);
1830
1831         /* lock the parent directory */
1832         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1833         if (status < 0) {
1834                 if (status != -ENOENT)
1835                         mlog_errno(status);
1836                 return status;
1837         }
1838
1839         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1840         if (!ocfs2_read_links_count(dirfe)) {
1841                 /* can't make a file in a deleted directory. */
1842                 status = -ENOENT;
1843                 goto bail;
1844         }
1845
1846         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1847                                            dentry->d_name.len);
1848         if (status)
1849                 goto bail;
1850
1851         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1852                                               dentry->d_name.name,
1853                                               dentry->d_name.len, &lookup);
1854         if (status < 0) {
1855                 mlog_errno(status);
1856                 goto bail;
1857         }
1858
1859         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1860         if (status < 0) {
1861                 if (status != -ENOSPC)
1862                         mlog_errno(status);
1863                 goto bail;
1864         }
1865
1866         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1867         if (IS_ERR(inode)) {
1868                 status = PTR_ERR(inode);
1869                 inode = NULL;
1870                 mlog_errno(status);
1871                 goto bail;
1872         }
1873
1874         /* get security xattr */
1875         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1876         if (status) {
1877                 if (status == -EOPNOTSUPP)
1878                         si.enable = 0;
1879                 else {
1880                         mlog_errno(status);
1881                         goto bail;
1882                 }
1883         }
1884
1885         /* calculate meta data/clusters for setting security xattr */
1886         if (si.enable) {
1887                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1888                                                   &xattr_credits, &xattr_ac);
1889                 if (status < 0) {
1890                         mlog_errno(status);
1891                         goto bail;
1892                 }
1893         }
1894
1895         /* don't reserve bitmap space for fast symlinks. */
1896         if (l > ocfs2_fast_symlink_chars(sb))
1897                 want_clusters += 1;
1898
1899         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1900         if (status < 0) {
1901                 if (status != -ENOSPC)
1902                         mlog_errno(status);
1903                 goto bail;
1904         }
1905
1906         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1907         if (IS_ERR(handle)) {
1908                 status = PTR_ERR(handle);
1909                 handle = NULL;
1910                 mlog_errno(status);
1911                 goto bail;
1912         }
1913
1914         /* Starting to change things, restart is no longer possible. */
1915         ocfs2_block_signals(&oldset);
1916         did_block_signals = 1;
1917
1918         status = dquot_alloc_inode(inode);
1919         if (status)
1920                 goto bail;
1921         did_quota_inode = 1;
1922
1923         trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1924                                    dentry->d_name.name,
1925                                    (unsigned long long)OCFS2_I(dir)->ip_blkno,
1926                                    inode->i_mode);
1927
1928         status = ocfs2_mknod_locked(osb, dir, inode,
1929                                     0, &new_fe_bh, parent_fe_bh, handle,
1930                                     inode_ac);
1931         if (status < 0) {
1932                 mlog_errno(status);
1933                 goto bail;
1934         }
1935
1936         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1937         inode->i_rdev = 0;
1938         newsize = l - 1;
1939         inode->i_op = &ocfs2_symlink_inode_operations;
1940         inode_nohighmem(inode);
1941         if (l > ocfs2_fast_symlink_chars(sb)) {
1942                 u32 offset = 0;
1943
1944                 status = dquot_alloc_space_nodirty(inode,
1945                     ocfs2_clusters_to_bytes(osb->sb, 1));
1946                 if (status)
1947                         goto bail;
1948                 did_quota = 1;
1949                 inode->i_mapping->a_ops = &ocfs2_aops;
1950                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1951                                               new_fe_bh,
1952                                               handle, data_ac, NULL,
1953                                               NULL);
1954                 if (status < 0) {
1955                         if (status != -ENOSPC && status != -EINTR) {
1956                                 mlog(ML_ERROR,
1957                                      "Failed to extend file to %llu\n",
1958                                      (unsigned long long)newsize);
1959                                 mlog_errno(status);
1960                                 status = -ENOSPC;
1961                         }
1962                         goto bail;
1963                 }
1964                 i_size_write(inode, newsize);
1965                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1966         } else {
1967                 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1968                 memcpy((char *) fe->id2.i_symlink, symname, l);
1969                 i_size_write(inode, newsize);
1970                 inode->i_blocks = 0;
1971         }
1972
1973         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1974         if (status < 0) {
1975                 mlog_errno(status);
1976                 goto bail;
1977         }
1978
1979         if (!ocfs2_inode_is_fast_symlink(inode)) {
1980                 status = ocfs2_create_symlink_data(osb, handle, inode,
1981                                                    symname);
1982                 if (status < 0) {
1983                         mlog_errno(status);
1984                         goto bail;
1985                 }
1986         }
1987
1988         if (si.enable) {
1989                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1990                                                  xattr_ac, data_ac);
1991                 if (status < 0) {
1992                         mlog_errno(status);
1993                         goto bail;
1994                 }
1995         }
1996
1997         /*
1998          * Do this before adding the entry to the directory. We add
1999          * also set d_op after success so that ->d_iput() will cleanup
2000          * the dentry lock even if ocfs2_add_entry() fails below.
2001          */
2002         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2003         if (status) {
2004                 mlog_errno(status);
2005                 goto bail;
2006         }
2007
2008         dl = dentry->d_fsdata;
2009
2010         status = ocfs2_add_entry(handle, dentry, inode,
2011                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
2012                                  &lookup);
2013         if (status < 0) {
2014                 mlog_errno(status);
2015                 goto bail;
2016         }
2017
2018         insert_inode_hash(inode);
2019         d_instantiate(dentry, inode);
2020 bail:
2021         if (status < 0 && did_quota)
2022                 dquot_free_space_nodirty(inode,
2023                                         ocfs2_clusters_to_bytes(osb->sb, 1));
2024         if (status < 0 && did_quota_inode)
2025                 dquot_free_inode(inode);
2026         if (handle)
2027                 ocfs2_commit_trans(osb, handle);
2028
2029         ocfs2_inode_unlock(dir, 1);
2030         if (did_block_signals)
2031                 ocfs2_unblock_signals(&oldset);
2032
2033         brelse(new_fe_bh);
2034         brelse(parent_fe_bh);
2035         kfree(si.value);
2036         ocfs2_free_dir_lookup_result(&lookup);
2037         if (inode_ac)
2038                 ocfs2_free_alloc_context(inode_ac);
2039         if (data_ac)
2040                 ocfs2_free_alloc_context(data_ac);
2041         if (xattr_ac)
2042                 ocfs2_free_alloc_context(xattr_ac);
2043         if ((status < 0) && inode) {
2044                 if (dl)
2045                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2046
2047                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2048                 clear_nlink(inode);
2049                 iput(inode);
2050         }
2051
2052         if (status)
2053                 mlog_errno(status);
2054
2055         return status;
2056 }
2057
2058 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2059 {
2060         int status, namelen;
2061
2062         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2063                            (long long)blkno);
2064         if (namelen <= 0) {
2065                 if (namelen)
2066                         status = namelen;
2067                 else
2068                         status = -EINVAL;
2069                 mlog_errno(status);
2070                 goto bail;
2071         }
2072         if (namelen != OCFS2_ORPHAN_NAMELEN) {
2073                 status = -EINVAL;
2074                 mlog_errno(status);
2075                 goto bail;
2076         }
2077
2078         trace_ocfs2_blkno_stringify(blkno, name, namelen);
2079
2080         status = 0;
2081 bail:
2082         if (status < 0)
2083                 mlog_errno(status);
2084         return status;
2085 }
2086
2087 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2088                                         struct inode **ret_orphan_dir,
2089                                         struct buffer_head **ret_orphan_dir_bh)
2090 {
2091         struct inode *orphan_dir_inode;
2092         struct buffer_head *orphan_dir_bh = NULL;
2093         int ret = 0;
2094
2095         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2096                                                        ORPHAN_DIR_SYSTEM_INODE,
2097                                                        osb->slot_num);
2098         if (!orphan_dir_inode) {
2099                 ret = -ENOENT;
2100                 mlog_errno(ret);
2101                 return ret;
2102         }
2103
2104         inode_lock(orphan_dir_inode);
2105
2106         ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2107         if (ret < 0) {
2108                 inode_unlock(orphan_dir_inode);
2109                 iput(orphan_dir_inode);
2110
2111                 mlog_errno(ret);
2112                 return ret;
2113         }
2114
2115         *ret_orphan_dir = orphan_dir_inode;
2116         *ret_orphan_dir_bh = orphan_dir_bh;
2117
2118         return 0;
2119 }
2120
2121 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2122                                       struct buffer_head *orphan_dir_bh,
2123                                       u64 blkno,
2124                                       char *name,
2125                                       struct ocfs2_dir_lookup_result *lookup,
2126                                       bool dio)
2127 {
2128         int ret;
2129         struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2130         int namelen = dio ?
2131                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2132                         OCFS2_ORPHAN_NAMELEN;
2133
2134         if (dio) {
2135                 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2136                                 OCFS2_DIO_ORPHAN_PREFIX);
2137                 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2138                         ret = -EINVAL;
2139                         mlog_errno(ret);
2140                         return ret;
2141                 }
2142
2143                 ret = ocfs2_blkno_stringify(blkno,
2144                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2145         } else
2146                 ret = ocfs2_blkno_stringify(blkno, name);
2147         if (ret < 0) {
2148                 mlog_errno(ret);
2149                 return ret;
2150         }
2151
2152         ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2153                                            orphan_dir_bh, name,
2154                                            namelen, lookup);
2155         if (ret < 0) {
2156                 mlog_errno(ret);
2157                 return ret;
2158         }
2159
2160         return 0;
2161 }
2162
2163 /**
2164  * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2165  * insertion of an orphan.
2166  * @osb: ocfs2 file system
2167  * @ret_orphan_dir: Orphan dir inode - returned locked!
2168  * @blkno: Actual block number of the inode to be inserted into orphan dir.
2169  * @lookup: dir lookup result, to be passed back into functions like
2170  *          ocfs2_orphan_add
2171  *
2172  * Returns zero on success and the ret_orphan_dir, name and lookup
2173  * fields will be populated.
2174  *
2175  * Returns non-zero on failure.
2176  */
2177 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2178                                     struct inode **ret_orphan_dir,
2179                                     u64 blkno,
2180                                     char *name,
2181                                     struct ocfs2_dir_lookup_result *lookup,
2182                                     bool dio)
2183 {
2184         struct inode *orphan_dir_inode = NULL;
2185         struct buffer_head *orphan_dir_bh = NULL;
2186         int ret = 0;
2187
2188         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2189                                            &orphan_dir_bh);
2190         if (ret < 0) {
2191                 mlog_errno(ret);
2192                 return ret;
2193         }
2194
2195         ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2196                                          blkno, name, lookup, dio);
2197         if (ret < 0) {
2198                 mlog_errno(ret);
2199                 goto out;
2200         }
2201
2202         *ret_orphan_dir = orphan_dir_inode;
2203
2204 out:
2205         brelse(orphan_dir_bh);
2206
2207         if (ret) {
2208                 ocfs2_inode_unlock(orphan_dir_inode, 1);
2209                 inode_unlock(orphan_dir_inode);
2210                 iput(orphan_dir_inode);
2211         }
2212
2213         if (ret)
2214                 mlog_errno(ret);
2215         return ret;
2216 }
2217
2218 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2219                             handle_t *handle,
2220                             struct inode *inode,
2221                             struct buffer_head *fe_bh,
2222                             char *name,
2223                             struct ocfs2_dir_lookup_result *lookup,
2224                             struct inode *orphan_dir_inode,
2225                             bool dio)
2226 {
2227         struct buffer_head *orphan_dir_bh = NULL;
2228         int status = 0;
2229         struct ocfs2_dinode *orphan_fe;
2230         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2231         int namelen = dio ?
2232                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2233                         OCFS2_ORPHAN_NAMELEN;
2234
2235         trace_ocfs2_orphan_add_begin(
2236                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2237
2238         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2239         if (status < 0) {
2240                 mlog_errno(status);
2241                 goto leave;
2242         }
2243
2244         status = ocfs2_journal_access_di(handle,
2245                                          INODE_CACHE(orphan_dir_inode),
2246                                          orphan_dir_bh,
2247                                          OCFS2_JOURNAL_ACCESS_WRITE);
2248         if (status < 0) {
2249                 mlog_errno(status);
2250                 goto leave;
2251         }
2252
2253         /*
2254          * We're going to journal the change of i_flags and i_orphaned_slot.
2255          * It's safe anyway, though some callers may duplicate the journaling.
2256          * Journaling within the func just make the logic look more
2257          * straightforward.
2258          */
2259         status = ocfs2_journal_access_di(handle,
2260                                          INODE_CACHE(inode),
2261                                          fe_bh,
2262                                          OCFS2_JOURNAL_ACCESS_WRITE);
2263         if (status < 0) {
2264                 mlog_errno(status);
2265                 goto leave;
2266         }
2267
2268         /* we're a cluster, and nlink can change on disk from
2269          * underneath us... */
2270         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2271         if (S_ISDIR(inode->i_mode))
2272                 ocfs2_add_links_count(orphan_fe, 1);
2273         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2274         ocfs2_journal_dirty(handle, orphan_dir_bh);
2275
2276         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2277                                    namelen, inode,
2278                                    OCFS2_I(inode)->ip_blkno,
2279                                    orphan_dir_bh, lookup);
2280         if (status < 0) {
2281                 mlog_errno(status);
2282                 goto rollback;
2283         }
2284
2285         if (dio) {
2286                 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2287                  * slot.
2288                  */
2289                 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2290                 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2291         } else {
2292                 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2293                 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2294
2295                 /* Record which orphan dir our inode now resides
2296                  * in. delete_inode will use this to determine which orphan
2297                  * dir to lock. */
2298                 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2299         }
2300
2301         ocfs2_journal_dirty(handle, fe_bh);
2302
2303         trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2304                                    osb->slot_num);
2305
2306 rollback:
2307         if (status < 0) {
2308                 if (S_ISDIR(inode->i_mode))
2309                         ocfs2_add_links_count(orphan_fe, -1);
2310                 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2311         }
2312
2313 leave:
2314         brelse(orphan_dir_bh);
2315
2316         return status;
2317 }
2318
2319 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2320 int ocfs2_orphan_del(struct ocfs2_super *osb,
2321                      handle_t *handle,
2322                      struct inode *orphan_dir_inode,
2323                      struct inode *inode,
2324                      struct buffer_head *orphan_dir_bh,
2325                      bool dio)
2326 {
2327         char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2328         struct ocfs2_dinode *orphan_fe;
2329         int status = 0;
2330         struct ocfs2_dir_lookup_result lookup = { NULL, };
2331
2332         if (dio) {
2333                 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2334                                 OCFS2_DIO_ORPHAN_PREFIX);
2335                 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2336                         status = -EINVAL;
2337                         mlog_errno(status);
2338                         return status;
2339                 }
2340
2341                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2342                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2343         } else
2344                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2345         if (status < 0) {
2346                 mlog_errno(status);
2347                 goto leave;
2348         }
2349
2350         trace_ocfs2_orphan_del(
2351              (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2352              name, strlen(name));
2353
2354         status = ocfs2_journal_access_di(handle,
2355                                          INODE_CACHE(orphan_dir_inode),
2356                                          orphan_dir_bh,
2357                                          OCFS2_JOURNAL_ACCESS_WRITE);
2358         if (status < 0) {
2359                 mlog_errno(status);
2360                 goto leave;
2361         }
2362
2363         /* find it's spot in the orphan directory */
2364         status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2365                                   &lookup);
2366         if (status) {
2367                 mlog_errno(status);
2368                 goto leave;
2369         }
2370
2371         /* remove it from the orphan directory */
2372         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2373         if (status < 0) {
2374                 mlog_errno(status);
2375                 goto leave;
2376         }
2377
2378         /* do the i_nlink dance! :) */
2379         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2380         if (S_ISDIR(inode->i_mode))
2381                 ocfs2_add_links_count(orphan_fe, -1);
2382         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2383         ocfs2_journal_dirty(handle, orphan_dir_bh);
2384
2385 leave:
2386         ocfs2_free_dir_lookup_result(&lookup);
2387
2388         if (status)
2389                 mlog_errno(status);
2390         return status;
2391 }
2392
2393 /**
2394  * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2395  * allocated file. This is different from the typical 'add to orphan dir'
2396  * operation in that the inode does not yet exist. This is a problem because
2397  * the orphan dir stringifies the inode block number to come up with it's
2398  * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2399  * problem. This function works around it by calling deeper into the orphan
2400  * and suballoc code than other callers. Use this only by necessity.
2401  * @dir: The directory which this inode will ultimately wind up under - not the
2402  * orphan dir!
2403  * @dir_bh: buffer_head the @dir inode block
2404  * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2405  * with the string to be used for orphan dirent. Pass back to the orphan dir
2406  * code.
2407  * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2408  * dir code.
2409  * @ret_di_blkno: block number where the new inode will be allocated.
2410  * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2411  * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2412  *
2413  * Returns zero on success and the ret_orphan_dir, name and lookup
2414  * fields will be populated.
2415  *
2416  * Returns non-zero on failure.
2417  */
2418 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2419                                         struct buffer_head *dir_bh,
2420                                         char *orphan_name,
2421                                         struct inode **ret_orphan_dir,
2422                                         u64 *ret_di_blkno,
2423                                         struct ocfs2_dir_lookup_result *orphan_insert,
2424                                         struct ocfs2_alloc_context **ret_inode_ac)
2425 {
2426         int ret;
2427         u64 di_blkno;
2428         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2429         struct inode *orphan_dir = NULL;
2430         struct buffer_head *orphan_dir_bh = NULL;
2431         struct ocfs2_alloc_context *inode_ac = NULL;
2432
2433         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2434         if (ret < 0) {
2435                 mlog_errno(ret);
2436                 return ret;
2437         }
2438
2439         /* reserve an inode spot */
2440         ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2441         if (ret < 0) {
2442                 if (ret != -ENOSPC)
2443                         mlog_errno(ret);
2444                 goto out;
2445         }
2446
2447         ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2448                                        &di_blkno);
2449         if (ret) {
2450                 mlog_errno(ret);
2451                 goto out;
2452         }
2453
2454         ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2455                                          di_blkno, orphan_name, orphan_insert,
2456                                          false);
2457         if (ret < 0) {
2458                 mlog_errno(ret);
2459                 goto out;
2460         }
2461
2462 out:
2463         if (ret == 0) {
2464                 *ret_orphan_dir = orphan_dir;
2465                 *ret_di_blkno = di_blkno;
2466                 *ret_inode_ac = inode_ac;
2467                 /*
2468                  * orphan_name and orphan_insert are already up to
2469                  * date via prepare_orphan_dir
2470                  */
2471         } else {
2472                 /* Unroll reserve_new_inode* */
2473                 if (inode_ac)
2474                         ocfs2_free_alloc_context(inode_ac);
2475
2476                 /* Unroll orphan dir locking */
2477                 inode_unlock(orphan_dir);
2478                 ocfs2_inode_unlock(orphan_dir, 1);
2479                 iput(orphan_dir);
2480         }
2481
2482         brelse(orphan_dir_bh);
2483
2484         return ret;
2485 }
2486
2487 int ocfs2_create_inode_in_orphan(struct inode *dir,
2488                                  int mode,
2489                                  struct inode **new_inode)
2490 {
2491         int status, did_quota_inode = 0;
2492         struct inode *inode = NULL;
2493         struct inode *orphan_dir = NULL;
2494         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2495         handle_t *handle = NULL;
2496         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2497         struct buffer_head *parent_di_bh = NULL;
2498         struct buffer_head *new_di_bh = NULL;
2499         struct ocfs2_alloc_context *inode_ac = NULL;
2500         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2501         u64 di_blkno, suballoc_loc;
2502         u16 suballoc_bit;
2503
2504         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2505         if (status < 0) {
2506                 if (status != -ENOENT)
2507                         mlog_errno(status);
2508                 return status;
2509         }
2510
2511         status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2512                                               orphan_name, &orphan_dir,
2513                                               &di_blkno, &orphan_insert, &inode_ac);
2514         if (status < 0) {
2515                 if (status != -ENOSPC)
2516                         mlog_errno(status);
2517                 goto leave;
2518         }
2519
2520         inode = ocfs2_get_init_inode(dir, mode);
2521         if (IS_ERR(inode)) {
2522                 status = PTR_ERR(inode);
2523                 inode = NULL;
2524                 mlog_errno(status);
2525                 goto leave;
2526         }
2527
2528         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2529         if (IS_ERR(handle)) {
2530                 status = PTR_ERR(handle);
2531                 handle = NULL;
2532                 mlog_errno(status);
2533                 goto leave;
2534         }
2535
2536         status = dquot_alloc_inode(inode);
2537         if (status)
2538                 goto leave;
2539         did_quota_inode = 1;
2540
2541         status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2542                                               &suballoc_loc,
2543                                               &suballoc_bit, di_blkno);
2544         if (status < 0) {
2545                 mlog_errno(status);
2546                 goto leave;
2547         }
2548
2549         clear_nlink(inode);
2550         /* do the real work now. */
2551         status = __ocfs2_mknod_locked(dir, inode,
2552                                       0, &new_di_bh, parent_di_bh, handle,
2553                                       inode_ac, di_blkno, suballoc_loc,
2554                                       suballoc_bit);
2555         if (status < 0) {
2556                 mlog_errno(status);
2557                 goto leave;
2558         }
2559
2560         status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2561                                   &orphan_insert, orphan_dir, false);
2562         if (status < 0) {
2563                 mlog_errno(status);
2564                 goto leave;
2565         }
2566
2567         /* get open lock so that only nodes can't remove it from orphan dir. */
2568         status = ocfs2_open_lock(inode);
2569         if (status < 0)
2570                 mlog_errno(status);
2571
2572         insert_inode_hash(inode);
2573 leave:
2574         if (status < 0 && did_quota_inode)
2575                 dquot_free_inode(inode);
2576         if (handle)
2577                 ocfs2_commit_trans(osb, handle);
2578
2579         if (orphan_dir) {
2580                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2581                 ocfs2_inode_unlock(orphan_dir, 1);
2582                 inode_unlock(orphan_dir);
2583                 iput(orphan_dir);
2584         }
2585
2586         if ((status < 0) && inode) {
2587                 clear_nlink(inode);
2588                 iput(inode);
2589         }
2590
2591         if (inode_ac)
2592                 ocfs2_free_alloc_context(inode_ac);
2593
2594         brelse(new_di_bh);
2595
2596         if (!status)
2597                 *new_inode = inode;
2598
2599         ocfs2_free_dir_lookup_result(&orphan_insert);
2600
2601         ocfs2_inode_unlock(dir, 1);
2602         brelse(parent_di_bh);
2603         return status;
2604 }
2605
2606 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2607         struct inode *inode)
2608 {
2609         char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2610         struct inode *orphan_dir_inode = NULL;
2611         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2612         struct buffer_head *di_bh = NULL;
2613         int status = 0;
2614         handle_t *handle = NULL;
2615         struct ocfs2_dinode *di = NULL;
2616
2617         status = ocfs2_inode_lock(inode, &di_bh, 1);
2618         if (status < 0) {
2619                 mlog_errno(status);
2620                 goto bail;
2621         }
2622
2623         di = (struct ocfs2_dinode *) di_bh->b_data;
2624         /*
2625          * Another append dio crashed?
2626          * If so, manually recover it first.
2627          */
2628         if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2629                 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2630                 if (status < 0) {
2631                         if (status != -ENOSPC)
2632                                 mlog_errno(status);
2633                         goto bail_unlock_inode;
2634                 }
2635
2636                 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2637                 if (status < 0) {
2638                         mlog_errno(status);
2639                         goto bail_unlock_inode;
2640                 }
2641         }
2642
2643         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2644                         OCFS2_I(inode)->ip_blkno,
2645                         orphan_name,
2646                         &orphan_insert,
2647                         true);
2648         if (status < 0) {
2649                 mlog_errno(status);
2650                 goto bail_unlock_inode;
2651         }
2652
2653         handle = ocfs2_start_trans(osb,
2654                         OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2655         if (IS_ERR(handle)) {
2656                 status = PTR_ERR(handle);
2657                 goto bail_unlock_orphan;
2658         }
2659
2660         status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2661                         &orphan_insert, orphan_dir_inode, true);
2662         if (status)
2663                 mlog_errno(status);
2664
2665         ocfs2_commit_trans(osb, handle);
2666
2667 bail_unlock_orphan:
2668         ocfs2_inode_unlock(orphan_dir_inode, 1);
2669         inode_unlock(orphan_dir_inode);
2670         iput(orphan_dir_inode);
2671
2672         ocfs2_free_dir_lookup_result(&orphan_insert);
2673
2674 bail_unlock_inode:
2675         ocfs2_inode_unlock(inode, 1);
2676         brelse(di_bh);
2677
2678 bail:
2679         return status;
2680 }
2681
2682 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2683                 struct inode *inode, struct buffer_head *di_bh,
2684                 int update_isize, loff_t end)
2685 {
2686         struct inode *orphan_dir_inode = NULL;
2687         struct buffer_head *orphan_dir_bh = NULL;
2688         struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2689         handle_t *handle = NULL;
2690         int status = 0;
2691
2692         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2693                         ORPHAN_DIR_SYSTEM_INODE,
2694                         le16_to_cpu(di->i_dio_orphaned_slot));
2695         if (!orphan_dir_inode) {
2696                 status = -ENOENT;
2697                 mlog_errno(status);
2698                 goto bail;
2699         }
2700
2701         inode_lock(orphan_dir_inode);
2702         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2703         if (status < 0) {
2704                 inode_unlock(orphan_dir_inode);
2705                 iput(orphan_dir_inode);
2706                 mlog_errno(status);
2707                 goto bail;
2708         }
2709
2710         handle = ocfs2_start_trans(osb,
2711                         OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2712         if (IS_ERR(handle)) {
2713                 status = PTR_ERR(handle);
2714                 goto bail_unlock_orphan;
2715         }
2716
2717         BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2718
2719         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2720                                 inode, orphan_dir_bh, true);
2721         if (status < 0) {
2722                 mlog_errno(status);
2723                 goto bail_commit;
2724         }
2725
2726         status = ocfs2_journal_access_di(handle,
2727                         INODE_CACHE(inode),
2728                         di_bh,
2729                         OCFS2_JOURNAL_ACCESS_WRITE);
2730         if (status < 0) {
2731                 mlog_errno(status);
2732                 goto bail_commit;
2733         }
2734
2735         di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2736         di->i_dio_orphaned_slot = 0;
2737
2738         if (update_isize) {
2739                 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2740                 if (status)
2741                         mlog_errno(status);
2742         } else
2743                 ocfs2_journal_dirty(handle, di_bh);
2744
2745 bail_commit:
2746         ocfs2_commit_trans(osb, handle);
2747
2748 bail_unlock_orphan:
2749         ocfs2_inode_unlock(orphan_dir_inode, 1);
2750         inode_unlock(orphan_dir_inode);
2751         brelse(orphan_dir_bh);
2752         iput(orphan_dir_inode);
2753
2754 bail:
2755         return status;
2756 }
2757
2758 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2759                                    struct inode *inode,
2760                                    struct dentry *dentry)
2761 {
2762         int status = 0;
2763         struct buffer_head *parent_di_bh = NULL;
2764         handle_t *handle = NULL;
2765         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2766         struct ocfs2_dinode *dir_di, *di;
2767         struct inode *orphan_dir_inode = NULL;
2768         struct buffer_head *orphan_dir_bh = NULL;
2769         struct buffer_head *di_bh = NULL;
2770         struct ocfs2_dir_lookup_result lookup = { NULL, };
2771
2772         trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2773                                 dentry->d_name.len, dentry->d_name.name,
2774                                 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2775                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2776
2777         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2778         if (status < 0) {
2779                 if (status != -ENOENT)
2780                         mlog_errno(status);
2781                 return status;
2782         }
2783
2784         dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2785         if (!dir_di->i_links_count) {
2786                 /* can't make a file in a deleted directory. */
2787                 status = -ENOENT;
2788                 goto leave;
2789         }
2790
2791         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2792                                            dentry->d_name.len);
2793         if (status)
2794                 goto leave;
2795
2796         /* get a spot inside the dir. */
2797         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2798                                               dentry->d_name.name,
2799                                               dentry->d_name.len, &lookup);
2800         if (status < 0) {
2801                 mlog_errno(status);
2802                 goto leave;
2803         }
2804
2805         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2806                                                        ORPHAN_DIR_SYSTEM_INODE,
2807                                                        osb->slot_num);
2808         if (!orphan_dir_inode) {
2809                 status = -ENOENT;
2810                 mlog_errno(status);
2811                 goto leave;
2812         }
2813
2814         inode_lock(orphan_dir_inode);
2815
2816         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2817         if (status < 0) {
2818                 mlog_errno(status);
2819                 inode_unlock(orphan_dir_inode);
2820                 iput(orphan_dir_inode);
2821                 goto leave;
2822         }
2823
2824         status = ocfs2_read_inode_block(inode, &di_bh);
2825         if (status < 0) {
2826                 mlog_errno(status);
2827                 goto orphan_unlock;
2828         }
2829
2830         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2831         if (IS_ERR(handle)) {
2832                 status = PTR_ERR(handle);
2833                 handle = NULL;
2834                 mlog_errno(status);
2835                 goto orphan_unlock;
2836         }
2837
2838         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2839                                          di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2840         if (status < 0) {
2841                 mlog_errno(status);
2842                 goto out_commit;
2843         }
2844
2845         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2846                                   orphan_dir_bh, false);
2847         if (status < 0) {
2848                 mlog_errno(status);
2849                 goto out_commit;
2850         }
2851
2852         di = (struct ocfs2_dinode *)di_bh->b_data;
2853         di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2854         di->i_orphaned_slot = 0;
2855         set_nlink(inode, 1);
2856         ocfs2_set_links_count(di, inode->i_nlink);
2857         ocfs2_update_inode_fsync_trans(handle, inode, 1);
2858         ocfs2_journal_dirty(handle, di_bh);
2859
2860         status = ocfs2_add_entry(handle, dentry, inode,
2861                                  OCFS2_I(inode)->ip_blkno, parent_di_bh,
2862                                  &lookup);
2863         if (status < 0) {
2864                 mlog_errno(status);
2865                 goto out_commit;
2866         }
2867
2868         status = ocfs2_dentry_attach_lock(dentry, inode,
2869                                           OCFS2_I(dir)->ip_blkno);
2870         if (status) {
2871                 mlog_errno(status);
2872                 goto out_commit;
2873         }
2874
2875         d_instantiate(dentry, inode);
2876         status = 0;
2877 out_commit:
2878         ocfs2_commit_trans(osb, handle);
2879 orphan_unlock:
2880         ocfs2_inode_unlock(orphan_dir_inode, 1);
2881         inode_unlock(orphan_dir_inode);
2882         iput(orphan_dir_inode);
2883 leave:
2884
2885         ocfs2_inode_unlock(dir, 1);
2886
2887         brelse(di_bh);
2888         brelse(parent_di_bh);
2889         brelse(orphan_dir_bh);
2890
2891         ocfs2_free_dir_lookup_result(&lookup);
2892
2893         if (status)
2894                 mlog_errno(status);
2895
2896         return status;
2897 }
2898
2899 const struct inode_operations ocfs2_dir_iops = {
2900         .create         = ocfs2_create,
2901         .lookup         = ocfs2_lookup,
2902         .link           = ocfs2_link,
2903         .unlink         = ocfs2_unlink,
2904         .rmdir          = ocfs2_unlink,
2905         .symlink        = ocfs2_symlink,
2906         .mkdir          = ocfs2_mkdir,
2907         .mknod          = ocfs2_mknod,
2908         .rename         = ocfs2_rename,
2909         .setattr        = ocfs2_setattr,
2910         .getattr        = ocfs2_getattr,
2911         .permission     = ocfs2_permission,
2912         .listxattr      = ocfs2_listxattr,
2913         .fiemap         = ocfs2_fiemap,
2914         .get_acl        = ocfs2_iop_get_acl,
2915         .set_acl        = ocfs2_iop_set_acl,
2916 };