fs/ocfs2/namei.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * namei.c
   4  *
   5  * Create and rename file, directory, symlinks
   6  *
   7  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
   8  *
   9  *  Portions of this code from linux/fs/ext3/dir.c
  10  *
  11  *  Copyright (C) 1992, 1993, 1994, 1995
  12  *  Remy Card ([email protected])
  13  *  Laboratoire MASI - Institut Blaise pascal
  14  *  Universite Pierre et Marie Curie (Paris VI)
  15  *
  16  *   from
  17  *
  18  *   linux/fs/minix/dir.c
  19  *
  20  *   Copyright (C) 1991, 1992 Linux Torvalds
  21  */
  22
  23 #include <linux/fs.h>
  24 #include <linux/types.h>
  25 #include <linux/slab.h>
  26 #include <linux/highmem.h>
  27 #include <linux/quotaops.h>
  28 #include <linux/iversion.h>
  29
  30 #include <cluster/masklog.h>
  31
  32 #include "ocfs2.h"
  33
  34 #include "alloc.h"
  35 #include "dcache.h"
  36 #include "dir.h"
  37 #include "dlmglue.h"
  38 #include "extent_map.h"
  39 #include "file.h"
  40 #include "inode.h"
  41 #include "journal.h"
  42 #include "namei.h"
  43 #include "suballoc.h"
  44 #include "super.h"
  45 #include "symlink.h"
  46 #include "sysfile.h"
  47 #include "uptodate.h"
  48 #include "xattr.h"
  49 #include "acl.h"
  50 #include "ocfs2_trace.h"
  51 #include "ioctl.h"
  52
  53 #include "buffer_head_io.h"
  54
  55 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
  56                               struct inode *dir,
  57                               struct inode *inode,
  58                               dev_t dev,
  59                               struct buffer_head **new_fe_bh,
  60                               struct buffer_head *parent_fe_bh,
  61                               handle_t *handle,
  62                               struct ocfs2_alloc_context *inode_ac);
  63
  64 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
  65                                     struct inode **ret_orphan_dir,
  66                                     u64 blkno,
  67                                     char *name,
  68                                     struct ocfs2_dir_lookup_result *lookup,
  69                                     bool dio);
  70
  71 static int ocfs2_orphan_add(struct ocfs2_super *osb,
  72                             handle_t *handle,
  73                             struct inode *inode,
  74                             struct buffer_head *fe_bh,
  75                             char *name,
  76                             struct ocfs2_dir_lookup_result *lookup,
  77                             struct inode *orphan_dir_inode,
  78                             bool dio);
  79
  80 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
  81                                      handle_t *handle,
  82                                      struct inode *inode,
  83                                      const char *symname);
  84
  85 static int ocfs2_double_lock(struct ocfs2_super *osb,
  86                              struct buffer_head **bh1,
  87                              struct inode *inode1,
  88                              struct buffer_head **bh2,
  89                              struct inode *inode2,
  90                              int rename);
  91
  92 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
  93 /* An orphan dir name is an 8 byte value, printed as a hex string */
  94 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
  95
  96 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
  97                                    unsigned int flags)
  98 {
  99         int status;
 100         u64 blkno;
 101         struct inode *inode = NULL;
 102         struct dentry *ret;
 103         struct ocfs2_inode_info *oi;
 104
 105         trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
 106                            dentry->d_name.name,
 107                            (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
 108
 109         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
 110                 ret = ERR_PTR(-ENAMETOOLONG);
 111                 goto bail;
 112         }
 113
 114         status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
 115         if (status < 0) {
 116                 if (status != -ENOENT)
 117                         mlog_errno(status);
 118                 ret = ERR_PTR(status);
 119                 goto bail;
 120         }
 121
 122         status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
 123                                             dentry->d_name.len, &blkno);
 124         if (status < 0)
 125                 goto bail_add;
 126
 127         inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
 128         if (IS_ERR(inode)) {
 129                 ret = ERR_PTR(-EACCES);
 130                 goto bail_unlock;
 131         }
 132
 133         oi = OCFS2_I(inode);
 134         /* Clear any orphaned state... If we were able to look up the
 135          * inode from a directory, it certainly can't be orphaned. We
 136          * might have the bad state from a node which intended to
 137          * orphan this inode but crashed before it could commit the
 138          * unlink. */
 139         spin_lock(&oi->ip_lock);
 140         oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
 141         spin_unlock(&oi->ip_lock);
 142
 143 bail_add:
 144         ret = d_splice_alias(inode, dentry);
 145
 146         if (inode) {
 147                 /*
 148                  * If d_splice_alias() finds a DCACHE_DISCONNECTED
 149                  * dentry, it will d_move() it on top of ourse. The
 150                  * return value will indicate this however, so in
 151                  * those cases, we switch them around for the locking
 152                  * code.
 153                  *
 154                  * NOTE: This dentry already has ->d_op set from
 155                  * ocfs2_get_parent() and ocfs2_get_dentry()
 156                  */
 157                 if (!IS_ERR_OR_NULL(ret))
 158                         dentry = ret;
 159
 160                 status = ocfs2_dentry_attach_lock(dentry, inode,
 161                                                   OCFS2_I(dir)->ip_blkno);
 162                 if (status) {
 163                         mlog_errno(status);
 164                         ret = ERR_PTR(status);
 165                         goto bail_unlock;
 166                 }
 167         } else
 168                 ocfs2_dentry_attach_gen(dentry);
 169
 170 bail_unlock:
 171         /* Don't drop the cluster lock until *after* the d_add --
 172          * unlink on another node will message us to remove that
 173          * dentry under this lock so otherwise we can race this with
 174          * the downconvert thread and have a stale dentry. */
 175         ocfs2_inode_unlock(dir, 0);
 176
 177 bail:
 178
 179         trace_ocfs2_lookup_ret(ret);
 180
 181         return ret;
 182 }
 183
 184 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
 185 {
 186         struct inode *inode;
 187         int status;
 188
 189         inode = new_inode(dir->i_sb);
 190         if (!inode) {
 191                 mlog(ML_ERROR, "new_inode failed!\n");
 192                 return ERR_PTR(-ENOMEM);
 193         }
 194
 195         /* populate as many fields early on as possible - many of
 196          * these are used by the support functions here and in
 197          * callers. */
 198         if (S_ISDIR(mode))
 199                 set_nlink(inode, 2);
 200         mode = mode_strip_sgid(&nop_mnt_idmap, dir, mode);
 201         inode_init_owner(&nop_mnt_idmap, inode, dir, mode);
 202         status = dquot_initialize(inode);
 203         if (status) {
 204                 iput(inode);
 205                 return ERR_PTR(status);
 206         }
 207
 208         return inode;
 209 }
 210
 211 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
 212                 struct dentry *dentry, struct inode *inode)
 213 {
 214         struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
 215
 216         ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
 217         ocfs2_lock_res_free(&dl->dl_lockres);
 218         BUG_ON(dl->dl_count != 1);
 219         spin_lock(&dentry_attach_lock);
 220         dentry->d_fsdata = NULL;
 221         spin_unlock(&dentry_attach_lock);
 222         kfree(dl);
 223         iput(inode);
 224 }
 225
 226 static int ocfs2_mknod(struct mnt_idmap *idmap,
 227                        struct inode *dir,
 228                        struct dentry *dentry,
 229                        umode_t mode,
 230                        dev_t dev)
 231 {
 232         int status = 0;
 233         struct buffer_head *parent_fe_bh = NULL;
 234         handle_t *handle = NULL;
 235         struct ocfs2_super *osb;
 236         struct ocfs2_dinode *dirfe;
 237         struct ocfs2_dinode *fe = NULL;
 238         struct buffer_head *new_fe_bh = NULL;
 239         struct inode *inode = NULL;
 240         struct ocfs2_alloc_context *inode_ac = NULL;
 241         struct ocfs2_alloc_context *data_ac = NULL;
 242         struct ocfs2_alloc_context *meta_ac = NULL;
 243         int want_clusters = 0;
 244         int want_meta = 0;
 245         int xattr_credits = 0;
 246         struct ocfs2_security_xattr_info si = {
 247                 .name = NULL,
 248                 .enable = 1,
 249         };
 250         int did_quota_inode = 0;
 251         struct ocfs2_dir_lookup_result lookup = { NULL, };
 252         sigset_t oldset;
 253         int did_block_signals = 0;
 254         struct ocfs2_dentry_lock *dl = NULL;
 255
 256         trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 257                           (unsigned long long)OCFS2_I(dir)->ip_blkno,
 258                           (unsigned long)dev, mode);
 259
 260         status = dquot_initialize(dir);
 261         if (status) {
 262                 mlog_errno(status);
 263                 return status;
 264         }
 265
 266         /* get our super block */
 267         osb = OCFS2_SB(dir->i_sb);
 268
 269         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
 270         if (status < 0) {
 271                 if (status != -ENOENT)
 272                         mlog_errno(status);
 273                 return status;
 274         }
 275
 276         if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
 277                 status = -EMLINK;
 278                 goto leave;
 279         }
 280
 281         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
 282         if (!ocfs2_read_links_count(dirfe)) {
 283                 /* can't make a file in a deleted directory. */
 284                 status = -ENOENT;
 285                 goto leave;
 286         }
 287
 288         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 289                                            dentry->d_name.len);
 290         if (status)
 291                 goto leave;
 292
 293         /* get a spot inside the dir. */
 294         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 295                                               dentry->d_name.name,
 296                                               dentry->d_name.len, &lookup);
 297         if (status < 0) {
 298                 mlog_errno(status);
 299                 goto leave;
 300         }
 301
 302         /* reserve an inode spot */
 303         status = ocfs2_reserve_new_inode(osb, &inode_ac);
 304         if (status < 0) {
 305                 if (status != -ENOSPC)
 306                         mlog_errno(status);
 307                 goto leave;
 308         }
 309
 310         inode = ocfs2_get_init_inode(dir, mode);
 311         if (IS_ERR(inode)) {
 312                 status = PTR_ERR(inode);
 313                 inode = NULL;
 314                 mlog_errno(status);
 315                 goto leave;
 316         }
 317
 318         /* get security xattr */
 319         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
 320         if (status) {
 321                 if (status == -EOPNOTSUPP)
 322                         si.enable = 0;
 323                 else {
 324                         mlog_errno(status);
 325                         goto leave;
 326                 }
 327         }
 328
 329         /* calculate meta data/clusters for setting security and acl xattr */
 330         status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
 331                                        &si, &want_clusters,
 332                                        &xattr_credits, &want_meta);
 333         if (status < 0) {
 334                 mlog_errno(status);
 335                 goto leave;
 336         }
 337
 338         /* Reserve a cluster if creating an extent based directory. */
 339         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
 340                 want_clusters += 1;
 341
 342                 /* Dir indexing requires extra space as well */
 343                 if (ocfs2_supports_indexed_dirs(osb))
 344                         want_meta++;
 345         }
 346
 347         status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
 348         if (status < 0) {
 349                 if (status != -ENOSPC)
 350                         mlog_errno(status);
 351                 goto leave;
 352         }
 353
 354         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
 355         if (status < 0) {
 356                 if (status != -ENOSPC)
 357                         mlog_errno(status);
 358                 goto leave;
 359         }
 360
 361         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
 362                                                             S_ISDIR(mode),
 363                                                             xattr_credits));
 364         if (IS_ERR(handle)) {
 365                 status = PTR_ERR(handle);
 366                 handle = NULL;
 367                 mlog_errno(status);
 368                 goto leave;
 369         }
 370
 371         /* Starting to change things, restart is no longer possible. */
 372         ocfs2_block_signals(&oldset);
 373         did_block_signals = 1;
 374
 375         status = dquot_alloc_inode(inode);
 376         if (status)
 377                 goto leave;
 378         did_quota_inode = 1;
 379
 380         /* do the real work now. */
 381         status = ocfs2_mknod_locked(osb, dir, inode, dev,
 382                                     &new_fe_bh, parent_fe_bh, handle,
 383                                     inode_ac);
 384         if (status < 0) {
 385                 mlog_errno(status);
 386                 goto leave;
 387         }
 388
 389         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
 390         if (S_ISDIR(mode)) {
 391                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
 392                                             new_fe_bh, data_ac, meta_ac);
 393                 if (status < 0) {
 394                         mlog_errno(status);
 395                         goto leave;
 396                 }
 397
 398                 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
 399                                                  parent_fe_bh,
 400                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 401                 if (status < 0) {
 402                         mlog_errno(status);
 403                         goto leave;
 404                 }
 405                 ocfs2_add_links_count(dirfe, 1);
 406                 ocfs2_journal_dirty(handle, parent_fe_bh);
 407                 inc_nlink(dir);
 408         }
 409
 410         status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
 411                          meta_ac, data_ac);
 412
 413         if (status < 0) {
 414                 mlog_errno(status);
 415                 goto roll_back;
 416         }
 417
 418         if (si.enable) {
 419                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
 420                                                  meta_ac, data_ac);
 421                 if (status < 0) {
 422                         mlog_errno(status);
 423                         goto roll_back;
 424                 }
 425         }
 426
 427         /*
 428          * Do this before adding the entry to the directory. We add
 429          * also set d_op after success so that ->d_iput() will cleanup
 430          * the dentry lock even if ocfs2_add_entry() fails below.
 431          */
 432         status = ocfs2_dentry_attach_lock(dentry, inode,
 433                                           OCFS2_I(dir)->ip_blkno);
 434         if (status) {
 435                 mlog_errno(status);
 436                 goto roll_back;
 437         }
 438
 439         dl = dentry->d_fsdata;
 440
 441         status = ocfs2_add_entry(handle, dentry, inode,
 442                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
 443                                  &lookup);
 444         if (status < 0) {
 445                 mlog_errno(status);
 446                 goto roll_back;
 447         }
 448
 449         insert_inode_hash(inode);
 450         d_instantiate(dentry, inode);
 451         status = 0;
 452
 453 roll_back:
 454         if (status < 0 && S_ISDIR(mode)) {
 455                 ocfs2_add_links_count(dirfe, -1);
 456                 drop_nlink(dir);
 457         }
 458
 459 leave:
 460         if (status < 0 && did_quota_inode)
 461                 dquot_free_inode(inode);
 462         if (handle) {
 463                 if (status < 0 && fe)
 464                         ocfs2_set_links_count(fe, 0);
 465                 ocfs2_commit_trans(osb, handle);
 466         }
 467
 468         ocfs2_inode_unlock(dir, 1);
 469         if (did_block_signals)
 470                 ocfs2_unblock_signals(&oldset);
 471
 472         brelse(new_fe_bh);
 473         brelse(parent_fe_bh);
 474         kfree(si.value);
 475
 476         ocfs2_free_dir_lookup_result(&lookup);
 477
 478         if (inode_ac)
 479                 ocfs2_free_alloc_context(inode_ac);
 480
 481         if (data_ac)
 482                 ocfs2_free_alloc_context(data_ac);
 483
 484         if (meta_ac)
 485                 ocfs2_free_alloc_context(meta_ac);
 486
 487         /*
 488          * We should call iput after the i_rwsem of the bitmap been
 489          * unlocked in ocfs2_free_alloc_context, or the
 490          * ocfs2_delete_inode will mutex_lock again.
 491          */
 492         if ((status < 0) && inode) {
 493                 if (dl)
 494                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
 495
 496                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
 497                 clear_nlink(inode);
 498                 iput(inode);
 499         }
 500
 501         if (status)
 502                 mlog_errno(status);
 503
 504         return status;
 505 }
 506
 507 static int __ocfs2_mknod_locked(struct inode *dir,
 508                                 struct inode *inode,
 509                                 dev_t dev,
 510                                 struct buffer_head **new_fe_bh,
 511                                 struct buffer_head *parent_fe_bh,
 512                                 handle_t *handle,
 513                                 struct ocfs2_alloc_context *inode_ac,
 514                                 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
 515 {
 516         int status = 0;
 517         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 518         struct ocfs2_dinode *fe = NULL;
 519         struct ocfs2_extent_list *fel;
 520         u16 feat;
 521         struct ocfs2_inode_info *oi = OCFS2_I(inode);
 522         struct timespec64 ts;
 523
 524         *new_fe_bh = NULL;
 525
 526         /* populate as many fields early on as possible - many of
 527          * these are used by the support functions here and in
 528          * callers. */
 529         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
 530         oi->ip_blkno = fe_blkno;
 531         spin_lock(&osb->osb_lock);
 532         inode->i_generation = osb->s_next_generation++;
 533         spin_unlock(&osb->osb_lock);
 534
 535         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
 536         if (!*new_fe_bh) {
 537                 status = -ENOMEM;
 538                 mlog_errno(status);
 539                 goto leave;
 540         }
 541         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
 542
 543         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
 544                                          *new_fe_bh,
 545                                          OCFS2_JOURNAL_ACCESS_CREATE);
 546         if (status < 0) {
 547                 mlog_errno(status);
 548                 goto leave;
 549         }
 550
 551         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
 552         memset(fe, 0, osb->sb->s_blocksize);
 553
 554         fe->i_generation = cpu_to_le32(inode->i_generation);
 555         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
 556         fe->i_blkno = cpu_to_le64(fe_blkno);
 557         fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
 558         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
 559         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
 560         fe->i_uid = cpu_to_le32(i_uid_read(inode));
 561         fe->i_gid = cpu_to_le32(i_gid_read(inode));
 562         fe->i_mode = cpu_to_le16(inode->i_mode);
 563         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 564                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
 565
 566         ocfs2_set_links_count(fe, inode->i_nlink);
 567
 568         fe->i_last_eb_blk = 0;
 569         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 570         fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
 571         ktime_get_coarse_real_ts64(&ts);
 572         fe->i_atime = fe->i_ctime = fe->i_mtime =
 573                 cpu_to_le64(ts.tv_sec);
 574         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
 575                 cpu_to_le32(ts.tv_nsec);
 576         fe->i_dtime = 0;
 577
 578         /*
 579          * If supported, directories start with inline data. If inline
 580          * isn't supported, but indexing is, we start them as indexed.
 581          */
 582         feat = le16_to_cpu(fe->i_dyn_features);
 583         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
 584                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
 585
 586                 fe->id2.i_data.id_count = cpu_to_le16(
 587                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
 588         } else {
 589                 fel = &fe->id2.i_list;
 590                 fel->l_tree_depth = 0;
 591                 fel->l_next_free_rec = 0;
 592                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
 593         }
 594
 595         ocfs2_journal_dirty(handle, *new_fe_bh);
 596
 597         ocfs2_populate_inode(inode, fe, 1);
 598         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
 599         if (!ocfs2_mount_local(osb)) {
 600                 status = ocfs2_create_new_inode_locks(inode);
 601                 if (status < 0)
 602                         mlog_errno(status);
 603         }
 604
 605         ocfs2_update_inode_fsync_trans(handle, inode, 1);
 606
 607 leave:
 608         if (status < 0) {
 609                 if (*new_fe_bh) {
 610                         brelse(*new_fe_bh);
 611                         *new_fe_bh = NULL;
 612                 }
 613         }
 614
 615         if (status)
 616                 mlog_errno(status);
 617         return status;
 618 }
 619
 620 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 621                               struct inode *dir,
 622                               struct inode *inode,
 623                               dev_t dev,
 624                               struct buffer_head **new_fe_bh,
 625                               struct buffer_head *parent_fe_bh,
 626                               handle_t *handle,
 627                               struct ocfs2_alloc_context *inode_ac)
 628 {
 629         int status = 0;
 630         u64 suballoc_loc, fe_blkno = 0;
 631         u16 suballoc_bit;
 632
 633         *new_fe_bh = NULL;
 634
 635         status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
 636                                        inode_ac, &suballoc_loc,
 637                                        &suballoc_bit, &fe_blkno);
 638         if (status < 0) {
 639                 mlog_errno(status);
 640                 return status;
 641         }
 642
 643         return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
 644                                     parent_fe_bh, handle, inode_ac,
 645                                     fe_blkno, suballoc_loc, suballoc_bit);
 646 }
 647
 648 static int ocfs2_mkdir(struct mnt_idmap *idmap,
 649                        struct inode *dir,
 650                        struct dentry *dentry,
 651                        umode_t mode)
 652 {
 653         int ret;
 654
 655         trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 656                           OCFS2_I(dir)->ip_blkno, mode);
 657         ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFDIR, 0);
 658         if (ret)
 659                 mlog_errno(ret);
 660
 661         return ret;
 662 }
 663
 664 static int ocfs2_create(struct mnt_idmap *idmap,
 665                         struct inode *dir,
 666                         struct dentry *dentry,
 667                         umode_t mode,
 668                         bool excl)
 669 {
 670         int ret;
 671
 672         trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 673                            (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
 674         ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFREG, 0);
 675         if (ret)
 676                 mlog_errno(ret);
 677
 678         return ret;
 679 }
 680
 681 static int ocfs2_link(struct dentry *old_dentry,
 682                       struct inode *dir,
 683                       struct dentry *dentry)
 684 {
 685         handle_t *handle;
 686         struct inode *inode = d_inode(old_dentry);
 687         struct inode *old_dir = d_inode(old_dentry->d_parent);
 688         int err;
 689         struct buffer_head *fe_bh = NULL;
 690         struct buffer_head *old_dir_bh = NULL;
 691         struct buffer_head *parent_fe_bh = NULL;
 692         struct ocfs2_dinode *fe = NULL;
 693         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 694         struct ocfs2_dir_lookup_result lookup = { NULL, };
 695         sigset_t oldset;
 696         u64 old_de_ino;
 697
 698         trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
 699                          old_dentry->d_name.len, old_dentry->d_name.name,
 700                          dentry->d_name.len, dentry->d_name.name);
 701
 702         if (S_ISDIR(inode->i_mode))
 703                 return -EPERM;
 704
 705         err = dquot_initialize(dir);
 706         if (err) {
 707                 mlog_errno(err);
 708                 return err;
 709         }
 710
 711         err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
 712                         &parent_fe_bh, dir, 0);
 713         if (err < 0) {
 714                 if (err != -ENOENT)
 715                         mlog_errno(err);
 716                 return err;
 717         }
 718
 719         /* make sure both dirs have bhs
 720          * get an extra ref on old_dir_bh if old==new */
 721         if (!parent_fe_bh) {
 722                 if (old_dir_bh) {
 723                         parent_fe_bh = old_dir_bh;
 724                         get_bh(parent_fe_bh);
 725                 } else {
 726                         mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
 727                         err = -EIO;
 728                         goto out;
 729                 }
 730         }
 731
 732         if (!dir->i_nlink) {
 733                 err = -ENOENT;
 734                 goto out;
 735         }
 736
 737         err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
 738                         old_dentry->d_name.len, &old_de_ino);
 739         if (err) {
 740                 err = -ENOENT;
 741                 goto out;
 742         }
 743
 744         /*
 745          * Check whether another node removed the source inode while we
 746          * were in the vfs.
 747          */
 748         if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
 749                 err = -ENOENT;
 750                 goto out;
 751         }
 752
 753         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 754                                         dentry->d_name.len);
 755         if (err)
 756                 goto out;
 757
 758         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 759                                            dentry->d_name.name,
 760                                            dentry->d_name.len, &lookup);
 761         if (err < 0) {
 762                 mlog_errno(err);
 763                 goto out;
 764         }
 765
 766         err = ocfs2_inode_lock(inode, &fe_bh, 1);
 767         if (err < 0) {
 768                 if (err != -ENOENT)
 769                         mlog_errno(err);
 770                 goto out;
 771         }
 772
 773         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 774         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
 775                 err = -EMLINK;
 776                 goto out_unlock_inode;
 777         }
 778
 779         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
 780         if (IS_ERR(handle)) {
 781                 err = PTR_ERR(handle);
 782                 handle = NULL;
 783                 mlog_errno(err);
 784                 goto out_unlock_inode;
 785         }
 786
 787         /* Starting to change things, restart is no longer possible. */
 788         ocfs2_block_signals(&oldset);
 789
 790         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 791                                       OCFS2_JOURNAL_ACCESS_WRITE);
 792         if (err < 0) {
 793                 mlog_errno(err);
 794                 goto out_commit;
 795         }
 796
 797         inc_nlink(inode);
 798         inode_set_ctime_current(inode);
 799         ocfs2_set_links_count(fe, inode->i_nlink);
 800         fe->i_ctime = cpu_to_le64(inode_get_ctime_sec(inode));
 801         fe->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(inode));
 802         ocfs2_update_inode_fsync_trans(handle, inode, 0);
 803         ocfs2_journal_dirty(handle, fe_bh);
 804
 805         err = ocfs2_add_entry(handle, dentry, inode,
 806                               OCFS2_I(inode)->ip_blkno,
 807                               parent_fe_bh, &lookup);
 808         if (err) {
 809                 ocfs2_add_links_count(fe, -1);
 810                 drop_nlink(inode);
 811                 mlog_errno(err);
 812                 goto out_commit;
 813         }
 814
 815         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
 816         if (err) {
 817                 mlog_errno(err);
 818                 goto out_commit;
 819         }
 820
 821         ihold(inode);
 822         d_instantiate(dentry, inode);
 823
 824 out_commit:
 825         ocfs2_commit_trans(osb, handle);
 826         ocfs2_unblock_signals(&oldset);
 827 out_unlock_inode:
 828         ocfs2_inode_unlock(inode, 1);
 829
 830 out:
 831         ocfs2_double_unlock(old_dir, dir);
 832
 833         brelse(fe_bh);
 834         brelse(parent_fe_bh);
 835         brelse(old_dir_bh);
 836
 837         ocfs2_free_dir_lookup_result(&lookup);
 838
 839         if (err)
 840                 mlog_errno(err);
 841
 842         return err;
 843 }
 844
 845 /*
 846  * Takes and drops an exclusive lock on the given dentry. This will
 847  * force other nodes to drop it.
 848  */
 849 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 850 {
 851         int ret;
 852
 853         ret = ocfs2_dentry_lock(dentry, 1);
 854         if (ret)
 855                 mlog_errno(ret);
 856         else
 857                 ocfs2_dentry_unlock(dentry, 1);
 858
 859         return ret;
 860 }
 861
 862 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
 863 {
 864         if (S_ISDIR(inode->i_mode)) {
 865                 if (inode->i_nlink == 2)
 866                         return 1;
 867                 return 0;
 868         }
 869
 870         if (inode->i_nlink == 1)
 871                 return 1;
 872         return 0;
 873 }
 874
 875 static int ocfs2_unlink(struct inode *dir,
 876                         struct dentry *dentry)
 877 {
 878         int status;
 879         int child_locked = 0;
 880         bool is_unlinkable = false;
 881         struct inode *inode = d_inode(dentry);
 882         struct inode *orphan_dir = NULL;
 883         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 884         u64 blkno;
 885         struct ocfs2_dinode *fe = NULL;
 886         struct buffer_head *fe_bh = NULL;
 887         struct buffer_head *parent_node_bh = NULL;
 888         handle_t *handle = NULL;
 889         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 890         struct ocfs2_dir_lookup_result lookup = { NULL, };
 891         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
 892
 893         trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
 894                            dentry->d_name.name,
 895                            (unsigned long long)OCFS2_I(dir)->ip_blkno,
 896                            (unsigned long long)OCFS2_I(inode)->ip_blkno);
 897
 898         status = dquot_initialize(dir);
 899         if (status) {
 900                 mlog_errno(status);
 901                 return status;
 902         }
 903
 904         BUG_ON(d_inode(dentry->d_parent) != dir);
 905
 906         if (inode == osb->root_inode)
 907                 return -EPERM;
 908
 909         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
 910                                          OI_LS_PARENT);
 911         if (status < 0) {
 912                 if (status != -ENOENT)
 913                         mlog_errno(status);
 914                 return status;
 915         }
 916
 917         status = ocfs2_find_files_on_disk(dentry->d_name.name,
 918                                           dentry->d_name.len, &blkno, dir,
 919                                           &lookup);
 920         if (status < 0) {
 921                 if (status != -ENOENT)
 922                         mlog_errno(status);
 923                 goto leave;
 924         }
 925
 926         if (OCFS2_I(inode)->ip_blkno != blkno) {
 927                 status = -ENOENT;
 928
 929                 trace_ocfs2_unlink_noent(
 930                                 (unsigned long long)OCFS2_I(inode)->ip_blkno,
 931                                 (unsigned long long)blkno,
 932                                 OCFS2_I(inode)->ip_flags);
 933                 goto leave;
 934         }
 935
 936         status = ocfs2_inode_lock(inode, &fe_bh, 1);
 937         if (status < 0) {
 938                 if (status != -ENOENT)
 939                         mlog_errno(status);
 940                 goto leave;
 941         }
 942         child_locked = 1;
 943
 944         if (S_ISDIR(inode->i_mode)) {
 945                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
 946                         status = -ENOTEMPTY;
 947                         goto leave;
 948                 }
 949         }
 950
 951         status = ocfs2_remote_dentry_delete(dentry);
 952         if (status < 0) {
 953                 /* This remote delete should succeed under all normal
 954                  * circumstances. */
 955                 mlog_errno(status);
 956                 goto leave;
 957         }
 958
 959         if (ocfs2_inode_is_unlinkable(inode)) {
 960                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
 961                                                   OCFS2_I(inode)->ip_blkno,
 962                                                   orphan_name, &orphan_insert,
 963                                                   false);
 964                 if (status < 0) {
 965                         mlog_errno(status);
 966                         goto leave;
 967                 }
 968                 is_unlinkable = true;
 969         }
 970
 971         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
 972         if (IS_ERR(handle)) {
 973                 status = PTR_ERR(handle);
 974                 handle = NULL;
 975                 mlog_errno(status);
 976                 goto leave;
 977         }
 978
 979         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 980                                          OCFS2_JOURNAL_ACCESS_WRITE);
 981         if (status < 0) {
 982                 mlog_errno(status);
 983                 goto leave;
 984         }
 985
 986         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 987
 988         /* delete the name from the parent dir */
 989         status = ocfs2_delete_entry(handle, dir, &lookup);
 990         if (status < 0) {
 991                 mlog_errno(status);
 992                 goto leave;
 993         }
 994
 995         if (S_ISDIR(inode->i_mode))
 996                 drop_nlink(inode);
 997         drop_nlink(inode);
 998         ocfs2_set_links_count(fe, inode->i_nlink);
 999         ocfs2_update_inode_fsync_trans(handle, inode, 0);
1000         ocfs2_journal_dirty(handle, fe_bh);
1001
1002         inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
1003         if (S_ISDIR(inode->i_mode))
1004                 drop_nlink(dir);
1005
1006         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1007         if (status < 0) {
1008                 mlog_errno(status);
1009                 if (S_ISDIR(inode->i_mode))
1010                         inc_nlink(dir);
1011                 goto leave;
1012         }
1013
1014         if (is_unlinkable) {
1015                 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1016                                 orphan_name, &orphan_insert, orphan_dir, false);
1017                 if (status < 0)
1018                         mlog_errno(status);
1019         }
1020
1021 leave:
1022         if (handle)
1023                 ocfs2_commit_trans(osb, handle);
1024
1025         if (orphan_dir) {
1026                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1027                 ocfs2_inode_unlock(orphan_dir, 1);
1028                 inode_unlock(orphan_dir);
1029                 iput(orphan_dir);
1030         }
1031
1032         if (child_locked)
1033                 ocfs2_inode_unlock(inode, 1);
1034
1035         ocfs2_inode_unlock(dir, 1);
1036
1037         brelse(fe_bh);
1038         brelse(parent_node_bh);
1039
1040         ocfs2_free_dir_lookup_result(&orphan_insert);
1041         ocfs2_free_dir_lookup_result(&lookup);
1042
1043         if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1044                 mlog_errno(status);
1045
1046         return status;
1047 }
1048
1049 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1050                 u64 src_inode_no, u64 dest_inode_no)
1051 {
1052         int ret = 0, i = 0;
1053         u64 parent_inode_no = 0;
1054         u64 child_inode_no = src_inode_no;
1055         struct inode *child_inode;
1056
1057 #define MAX_LOOKUP_TIMES 32
1058         while (1) {
1059                 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1060                 if (IS_ERR(child_inode)) {
1061                         ret = PTR_ERR(child_inode);
1062                         break;
1063                 }
1064
1065                 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1066                 if (ret < 0) {
1067                         iput(child_inode);
1068                         if (ret != -ENOENT)
1069                                 mlog_errno(ret);
1070                         break;
1071                 }
1072
1073                 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1074                                 &parent_inode_no);
1075                 ocfs2_inode_unlock(child_inode, 0);
1076                 iput(child_inode);
1077                 if (ret < 0) {
1078                         ret = -ENOENT;
1079                         break;
1080                 }
1081
1082                 if (parent_inode_no == dest_inode_no) {
1083                         ret = 1;
1084                         break;
1085                 }
1086
1087                 if (parent_inode_no == osb->root_inode->i_ino) {
1088                         ret = 0;
1089                         break;
1090                 }
1091
1092                 child_inode_no = parent_inode_no;
1093
1094                 if (++i >= MAX_LOOKUP_TIMES) {
1095                         mlog_ratelimited(ML_NOTICE, "max lookup times reached, "
1096                                         "filesystem may have nested directories, "
1097                                         "src inode: %llu, dest inode: %llu.\n",
1098                                         (unsigned long long)src_inode_no,
1099                                         (unsigned long long)dest_inode_no);
1100                         ret = 0;
1101                         break;
1102                 }
1103         }
1104
1105         return ret;
1106 }
1107
1108 /*
1109  * The only place this should be used is rename and link!
1110  * if they have the same id, then the 1st one is the only one locked.
1111  */
1112 static int ocfs2_double_lock(struct ocfs2_super *osb,
1113                              struct buffer_head **bh1,
1114                              struct inode *inode1,
1115                              struct buffer_head **bh2,
1116                              struct inode *inode2,
1117                              int rename)
1118 {
1119         int status;
1120         int inode1_is_ancestor, inode2_is_ancestor;
1121         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1122         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1123
1124         trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1125                                 (unsigned long long)oi2->ip_blkno);
1126
1127         if (*bh1)
1128                 *bh1 = NULL;
1129         if (*bh2)
1130                 *bh2 = NULL;
1131
1132         /* we always want to lock the one with the lower lockid first.
1133          * and if they are nested, we lock ancestor first */
1134         if (oi1->ip_blkno != oi2->ip_blkno) {
1135                 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1136                                 oi1->ip_blkno);
1137                 if (inode1_is_ancestor < 0) {
1138                         status = inode1_is_ancestor;
1139                         goto bail;
1140                 }
1141
1142                 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1143                                 oi2->ip_blkno);
1144                 if (inode2_is_ancestor < 0) {
1145                         status = inode2_is_ancestor;
1146                         goto bail;
1147                 }
1148
1149                 if ((inode1_is_ancestor == 1) ||
1150                                 (oi1->ip_blkno < oi2->ip_blkno &&
1151                                 inode2_is_ancestor == 0)) {
1152                         /* switch id1 and id2 around */
1153                         swap(bh2, bh1);
1154                         swap(inode2, inode1);
1155                 }
1156                 /* lock id2 */
1157                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1158                                 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1159                 if (status < 0) {
1160                         if (status != -ENOENT)
1161                                 mlog_errno(status);
1162                         goto bail;
1163                 }
1164         }
1165
1166         /* lock id1 */
1167         status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1168                         rename == 1 ?  OI_LS_RENAME2 : OI_LS_PARENT);
1169         if (status < 0) {
1170                 /*
1171                  * An error return must mean that no cluster locks
1172                  * were held on function exit.
1173                  */
1174                 if (oi1->ip_blkno != oi2->ip_blkno) {
1175                         ocfs2_inode_unlock(inode2, 1);
1176                         brelse(*bh2);
1177                         *bh2 = NULL;
1178                 }
1179
1180                 if (status != -ENOENT)
1181                         mlog_errno(status);
1182         }
1183
1184         trace_ocfs2_double_lock_end(
1185                         (unsigned long long)oi1->ip_blkno,
1186                         (unsigned long long)oi2->ip_blkno);
1187
1188 bail:
1189         if (status)
1190                 mlog_errno(status);
1191         return status;
1192 }
1193
1194 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1195 {
1196         ocfs2_inode_unlock(inode1, 1);
1197
1198         if (inode1 != inode2)
1199                 ocfs2_inode_unlock(inode2, 1);
1200 }
1201
1202 static int ocfs2_rename(struct mnt_idmap *idmap,
1203                         struct inode *old_dir,
1204                         struct dentry *old_dentry,
1205                         struct inode *new_dir,
1206                         struct dentry *new_dentry,
1207                         unsigned int flags)
1208 {
1209         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1210         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1211         struct inode *old_inode = d_inode(old_dentry);
1212         struct inode *new_inode = d_inode(new_dentry);
1213         struct inode *orphan_dir = NULL;
1214         struct ocfs2_dinode *newfe = NULL;
1215         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1216         struct buffer_head *newfe_bh = NULL;
1217         struct buffer_head *old_inode_bh = NULL;
1218         struct ocfs2_super *osb = NULL;
1219         u64 newfe_blkno, old_de_ino;
1220         handle_t *handle = NULL;
1221         struct buffer_head *old_dir_bh = NULL;
1222         struct buffer_head *new_dir_bh = NULL;
1223         u32 old_dir_nlink = old_dir->i_nlink;
1224         struct ocfs2_dinode *old_di;
1225         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1226         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1227         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1228         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1229         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1230         bool should_add_orphan = false;
1231
1232         if (flags)
1233                 return -EINVAL;
1234
1235         /* At some point it might be nice to break this function up a
1236          * bit. */
1237
1238         trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1239                            old_dentry->d_name.len, old_dentry->d_name.name,
1240                            new_dentry->d_name.len, new_dentry->d_name.name);
1241
1242         status = dquot_initialize(old_dir);
1243         if (status) {
1244                 mlog_errno(status);
1245                 goto bail;
1246         }
1247         status = dquot_initialize(new_dir);
1248         if (status) {
1249                 mlog_errno(status);
1250                 goto bail;
1251         }
1252
1253         osb = OCFS2_SB(old_dir->i_sb);
1254
1255         if (new_inode) {
1256                 if (!igrab(new_inode))
1257                         BUG();
1258         }
1259
1260         /* Assume a directory hierarchy thusly:
1261          * a/b/c
1262          * a/d
1263          * a,b,c, and d are all directories.
1264          *
1265          * from cwd of 'a' on both nodes:
1266          * node1: mv b/c d
1267          * node2: mv d   b/c
1268          *
1269          * And that's why, just like the VFS, we need a file system
1270          * rename lock. */
1271         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1272                 status = ocfs2_rename_lock(osb);
1273                 if (status < 0) {
1274                         mlog_errno(status);
1275                         goto bail;
1276                 }
1277                 rename_lock = 1;
1278
1279                 /* here we cannot guarantee the inodes haven't just been
1280                  * changed, so check if they are nested again */
1281                 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1282                                 old_inode->i_ino);
1283                 if (status < 0) {
1284                         mlog_errno(status);
1285                         goto bail;
1286                 } else if (status == 1) {
1287                         status = -EPERM;
1288                         trace_ocfs2_rename_not_permitted(
1289                                         (unsigned long long)old_inode->i_ino,
1290                                         (unsigned long long)new_dir->i_ino);
1291                         goto bail;
1292                 }
1293         }
1294
1295         /* if old and new are the same, this'll just do one lock. */
1296         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1297                                    &new_dir_bh, new_dir, 1);
1298         if (status < 0) {
1299                 mlog_errno(status);
1300                 goto bail;
1301         }
1302         parents_locked = 1;
1303
1304         if (!new_dir->i_nlink) {
1305                 status = -EACCES;
1306                 goto bail;
1307         }
1308
1309         /* make sure both dirs have bhs
1310          * get an extra ref on old_dir_bh if old==new */
1311         if (!new_dir_bh) {
1312                 if (old_dir_bh) {
1313                         new_dir_bh = old_dir_bh;
1314                         get_bh(new_dir_bh);
1315                 } else {
1316                         mlog(ML_ERROR, "no old_dir_bh!\n");
1317                         status = -EIO;
1318                         goto bail;
1319                 }
1320         }
1321
1322         /*
1323          * Aside from allowing a meta data update, the locking here
1324          * also ensures that the downconvert thread on other nodes
1325          * won't have to concurrently downconvert the inode and the
1326          * dentry locks.
1327          */
1328         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1329                                          OI_LS_PARENT);
1330         if (status < 0) {
1331                 if (status != -ENOENT)
1332                         mlog_errno(status);
1333                 goto bail;
1334         }
1335         old_child_locked = 1;
1336
1337         status = ocfs2_remote_dentry_delete(old_dentry);
1338         if (status < 0) {
1339                 mlog_errno(status);
1340                 goto bail;
1341         }
1342
1343         if (S_ISDIR(old_inode->i_mode) && new_dir != old_dir) {
1344                 u64 old_inode_parent;
1345
1346                 update_dot_dot = 1;
1347                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1348                                                   old_inode,
1349                                                   &old_inode_dot_dot_res);
1350                 if (status) {
1351                         status = -EIO;
1352                         goto bail;
1353                 }
1354
1355                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1356                         status = -EIO;
1357                         goto bail;
1358                 }
1359
1360                 if (!new_inode && new_dir->i_nlink >= ocfs2_link_max(osb)) {
1361                         status = -EMLINK;
1362                         goto bail;
1363                 }
1364         }
1365
1366         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1367                                             old_dentry->d_name.len,
1368                                             &old_de_ino);
1369         if (status) {
1370                 status = -ENOENT;
1371                 goto bail;
1372         }
1373
1374         /*
1375          *  Check for inode number is _not_ due to possible IO errors.
1376          *  We might rmdir the source, keep it as pwd of some process
1377          *  and merrily kill the link to whatever was created under the
1378          *  same name. Goodbye sticky bit ;-<
1379          */
1380         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1381                 status = -ENOENT;
1382                 goto bail;
1383         }
1384
1385         /* check if the target already exists (in which case we need
1386          * to delete it */
1387         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1388                                           new_dentry->d_name.len,
1389                                           &newfe_blkno, new_dir,
1390                                           &target_lookup_res);
1391         /* The only error we allow here is -ENOENT because the new
1392          * file not existing is perfectly valid. */
1393         if ((status < 0) && (status != -ENOENT)) {
1394                 /* If we cannot find the file specified we should just */
1395                 /* return the error... */
1396                 mlog_errno(status);
1397                 goto bail;
1398         }
1399         if (status == 0)
1400                 target_exists = 1;
1401
1402         if (!target_exists && new_inode) {
1403                 /*
1404                  * Target was unlinked by another node while we were
1405                  * waiting to get to ocfs2_rename(). There isn't
1406                  * anything we can do here to help the situation, so
1407                  * bubble up the appropriate error.
1408                  */
1409                 status = -ENOENT;
1410                 goto bail;
1411         }
1412
1413         /* In case we need to overwrite an existing file, we blow it
1414          * away first */
1415         if (target_exists) {
1416                 /* VFS didn't think there existed an inode here, but
1417                  * someone else in the cluster must have raced our
1418                  * rename to create one. Today we error cleanly, in
1419                  * the future we should consider calling iget to build
1420                  * a new struct inode for this entry. */
1421                 if (!new_inode) {
1422                         status = -EACCES;
1423
1424                         trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1425                                                 new_dentry->d_name.name);
1426                         goto bail;
1427                 }
1428
1429                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1430                         status = -EACCES;
1431
1432                         trace_ocfs2_rename_disagree(
1433                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1434                              (unsigned long long)newfe_blkno,
1435                              OCFS2_I(new_inode)->ip_flags);
1436                         goto bail;
1437                 }
1438
1439                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1440                 if (status < 0) {
1441                         if (status != -ENOENT)
1442                                 mlog_errno(status);
1443                         goto bail;
1444                 }
1445                 new_child_locked = 1;
1446
1447                 status = ocfs2_remote_dentry_delete(new_dentry);
1448                 if (status < 0) {
1449                         mlog_errno(status);
1450                         goto bail;
1451                 }
1452
1453                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1454
1455                 trace_ocfs2_rename_over_existing(
1456                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1457                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1458
1459                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1460                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1461                                                 OCFS2_I(new_inode)->ip_blkno,
1462                                                 orphan_name, &orphan_insert,
1463                                                 false);
1464                         if (status < 0) {
1465                                 mlog_errno(status);
1466                                 goto bail;
1467                         }
1468                         should_add_orphan = true;
1469                 }
1470         } else {
1471                 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1472
1473                 status = ocfs2_check_dir_for_entry(new_dir,
1474                                                    new_dentry->d_name.name,
1475                                                    new_dentry->d_name.len);
1476                 if (status)
1477                         goto bail;
1478
1479                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1480                                                       new_dentry->d_name.name,
1481                                                       new_dentry->d_name.len,
1482                                                       &target_insert);
1483                 if (status < 0) {
1484                         mlog_errno(status);
1485                         goto bail;
1486                 }
1487         }
1488
1489         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1490         if (IS_ERR(handle)) {
1491                 status = PTR_ERR(handle);
1492                 handle = NULL;
1493                 mlog_errno(status);
1494                 goto bail;
1495         }
1496
1497         if (target_exists) {
1498                 if (S_ISDIR(new_inode->i_mode)) {
1499                         if (new_inode->i_nlink != 2 ||
1500                             !ocfs2_empty_dir(new_inode)) {
1501                                 status = -ENOTEMPTY;
1502                                 goto bail;
1503                         }
1504                 }
1505                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1506                                                  newfe_bh,
1507                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1508                 if (status < 0) {
1509                         mlog_errno(status);
1510                         goto bail;
1511                 }
1512
1513                 /* change the dirent to point to the correct inode */
1514                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1515                                             old_inode);
1516                 if (status < 0) {
1517                         mlog_errno(status);
1518                         goto bail;
1519                 }
1520                 inode_inc_iversion(new_dir);
1521
1522                 if (S_ISDIR(new_inode->i_mode))
1523                         ocfs2_set_links_count(newfe, 0);
1524                 else
1525                         ocfs2_add_links_count(newfe, -1);
1526                 ocfs2_journal_dirty(handle, newfe_bh);
1527                 if (should_add_orphan) {
1528                         status = ocfs2_orphan_add(osb, handle, new_inode,
1529                                         newfe_bh, orphan_name,
1530                                         &orphan_insert, orphan_dir, false);
1531                         if (status < 0) {
1532                                 mlog_errno(status);
1533                                 goto bail;
1534                         }
1535                 }
1536         } else {
1537                 /* if the name was not found in new_dir, add it now */
1538                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1539                                          OCFS2_I(old_inode)->ip_blkno,
1540                                          new_dir_bh, &target_insert);
1541                 if (status < 0) {
1542                         mlog_errno(status);
1543                         goto bail;
1544                 }
1545         }
1546
1547         inode_set_ctime_current(old_inode);
1548         mark_inode_dirty(old_inode);
1549
1550         status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1551                                          old_inode_bh,
1552                                          OCFS2_JOURNAL_ACCESS_WRITE);
1553         if (status >= 0) {
1554                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1555
1556                 old_di->i_ctime = cpu_to_le64(inode_get_ctime_sec(old_inode));
1557                 old_di->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(old_inode));
1558                 ocfs2_journal_dirty(handle, old_inode_bh);
1559         } else
1560                 mlog_errno(status);
1561
1562         /*
1563          * Now that the name has been added to new_dir, remove the old name.
1564          *
1565          * We don't keep any directory entry context around until now
1566          * because the insert might have changed the type of directory
1567          * we're dealing with.
1568          */
1569         status = ocfs2_find_entry(old_dentry->d_name.name,
1570                                   old_dentry->d_name.len, old_dir,
1571                                   &old_entry_lookup);
1572         if (status) {
1573                 if (!is_journal_aborted(osb->journal->j_journal)) {
1574                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1575                                         "is not deleted.",
1576                                         new_dentry->d_name.len, new_dentry->d_name.name,
1577                                         old_dentry->d_name.len, old_dentry->d_name.name);
1578                 }
1579                 goto bail;
1580         }
1581
1582         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1583         if (status < 0) {
1584                 mlog_errno(status);
1585                 if (!is_journal_aborted(osb->journal->j_journal)) {
1586                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1587                                         "is not deleted.",
1588                                         new_dentry->d_name.len, new_dentry->d_name.name,
1589                                         old_dentry->d_name.len, old_dentry->d_name.name);
1590                 }
1591                 goto bail;
1592         }
1593
1594         if (new_inode) {
1595                 drop_nlink(new_inode);
1596                 inode_set_ctime_current(new_inode);
1597         }
1598         inode_set_mtime_to_ts(old_dir, inode_set_ctime_current(old_dir));
1599
1600         if (update_dot_dot) {
1601                 status = ocfs2_update_entry(old_inode, handle,
1602                                             &old_inode_dot_dot_res, new_dir);
1603                 if (status < 0) {
1604                         mlog_errno(status);
1605                         goto bail;
1606                 }
1607         }
1608
1609         if (S_ISDIR(old_inode->i_mode)) {
1610                 drop_nlink(old_dir);
1611                 if (new_inode) {
1612                         drop_nlink(new_inode);
1613                 } else {
1614                         inc_nlink(new_dir);
1615                         mark_inode_dirty(new_dir);
1616                 }
1617         }
1618         mark_inode_dirty(old_dir);
1619         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1620         if (new_inode) {
1621                 mark_inode_dirty(new_inode);
1622                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1623         }
1624
1625         if (old_dir != new_dir) {
1626                 /* Keep the same times on both directories.*/
1627                 inode_set_mtime_to_ts(new_dir,
1628                                       inode_set_ctime_to_ts(new_dir, inode_get_ctime(old_dir)));
1629
1630                 /*
1631                  * This will also pick up the i_nlink change from the
1632                  * block above.
1633                  */
1634                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1635         }
1636
1637         if (old_dir_nlink != old_dir->i_nlink) {
1638                 if (!old_dir_bh) {
1639                         mlog(ML_ERROR, "need to change nlink for old dir "
1640                              "%llu from %d to %d but bh is NULL!\n",
1641                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1642                              (int)old_dir_nlink, old_dir->i_nlink);
1643                 } else {
1644                         struct ocfs2_dinode *fe;
1645                         status = ocfs2_journal_access_di(handle,
1646                                                          INODE_CACHE(old_dir),
1647                                                          old_dir_bh,
1648                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1649                         if (status < 0) {
1650                                 mlog_errno(status);
1651                                 goto bail;
1652                         }
1653                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1654                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1655                         ocfs2_journal_dirty(handle, old_dir_bh);
1656                 }
1657         }
1658         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1659         status = 0;
1660 bail:
1661         if (handle)
1662                 ocfs2_commit_trans(osb, handle);
1663
1664         if (orphan_dir) {
1665                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1666                 ocfs2_inode_unlock(orphan_dir, 1);
1667                 inode_unlock(orphan_dir);
1668                 iput(orphan_dir);
1669         }
1670
1671         if (new_child_locked)
1672                 ocfs2_inode_unlock(new_inode, 1);
1673
1674         if (old_child_locked)
1675                 ocfs2_inode_unlock(old_inode, 1);
1676
1677         if (parents_locked)
1678                 ocfs2_double_unlock(old_dir, new_dir);
1679
1680         if (rename_lock)
1681                 ocfs2_rename_unlock(osb);
1682
1683         if (new_inode)
1684                 sync_mapping_buffers(old_inode->i_mapping);
1685
1686         iput(new_inode);
1687
1688         ocfs2_free_dir_lookup_result(&target_lookup_res);
1689         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1690         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1691         ocfs2_free_dir_lookup_result(&orphan_insert);
1692         ocfs2_free_dir_lookup_result(&target_insert);
1693
1694         brelse(newfe_bh);
1695         brelse(old_inode_bh);
1696         brelse(old_dir_bh);
1697         brelse(new_dir_bh);
1698
1699         if (status)
1700                 mlog_errno(status);
1701
1702         return status;
1703 }
1704
1705 /*
1706  * we expect i_size = strlen(symname). Copy symname into the file
1707  * data, including the null terminator.
1708  */
1709 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1710                                      handle_t *handle,
1711                                      struct inode *inode,
1712                                      const char *symname)
1713 {
1714         struct buffer_head **bhs = NULL;
1715         const char *c;
1716         struct super_block *sb = osb->sb;
1717         u64 p_blkno, p_blocks;
1718         int virtual, blocks, status, i, bytes_left;
1719
1720         bytes_left = i_size_read(inode) + 1;
1721         /* we can't trust i_blocks because we're actually going to
1722          * write i_size + 1 bytes. */
1723         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1724
1725         trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1726                                         i_size_read(inode), blocks);
1727
1728         /* Sanity check -- make sure we're going to fit. */
1729         if (bytes_left >
1730             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1731                 status = -EIO;
1732                 mlog_errno(status);
1733                 goto bail;
1734         }
1735
1736         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1737         if (!bhs) {
1738                 status = -ENOMEM;
1739                 mlog_errno(status);
1740                 goto bail;
1741         }
1742
1743         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1744                                              NULL);
1745         if (status < 0) {
1746                 mlog_errno(status);
1747                 goto bail;
1748         }
1749
1750         /* links can never be larger than one cluster so we know this
1751          * is all going to be contiguous, but do a sanity check
1752          * anyway. */
1753         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1754                 status = -EIO;
1755                 mlog_errno(status);
1756                 goto bail;
1757         }
1758
1759         virtual = 0;
1760         while(bytes_left > 0) {
1761                 c = &symname[virtual * sb->s_blocksize];
1762
1763                 bhs[virtual] = sb_getblk(sb, p_blkno);
1764                 if (!bhs[virtual]) {
1765                         status = -ENOMEM;
1766                         mlog_errno(status);
1767                         goto bail;
1768                 }
1769                 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1770                                               bhs[virtual]);
1771
1772                 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1773                                               bhs[virtual],
1774                                               OCFS2_JOURNAL_ACCESS_CREATE);
1775                 if (status < 0) {
1776                         mlog_errno(status);
1777                         goto bail;
1778                 }
1779
1780                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1781
1782                 memcpy(bhs[virtual]->b_data, c,
1783                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1784                        bytes_left);
1785
1786                 ocfs2_journal_dirty(handle, bhs[virtual]);
1787
1788                 virtual++;
1789                 p_blkno++;
1790                 bytes_left -= sb->s_blocksize;
1791         }
1792
1793         status = 0;
1794 bail:
1795
1796         if (bhs) {
1797                 for(i = 0; i < blocks; i++)
1798                         brelse(bhs[i]);
1799                 kfree(bhs);
1800         }
1801
1802         if (status)
1803                 mlog_errno(status);
1804         return status;
1805 }
1806
1807 static int ocfs2_symlink(struct mnt_idmap *idmap,
1808                          struct inode *dir,
1809                          struct dentry *dentry,
1810                          const char *symname)
1811 {
1812         int status, l, credits;
1813         u64 newsize;
1814         struct ocfs2_super *osb = NULL;
1815         struct inode *inode = NULL;
1816         struct super_block *sb;
1817         struct buffer_head *new_fe_bh = NULL;
1818         struct buffer_head *parent_fe_bh = NULL;
1819         struct ocfs2_dinode *fe = NULL;
1820         struct ocfs2_dinode *dirfe;
1821         handle_t *handle = NULL;
1822         struct ocfs2_alloc_context *inode_ac = NULL;
1823         struct ocfs2_alloc_context *data_ac = NULL;
1824         struct ocfs2_alloc_context *xattr_ac = NULL;
1825         int want_clusters = 0;
1826         int xattr_credits = 0;
1827         struct ocfs2_security_xattr_info si = {
1828                 .name = NULL,
1829                 .enable = 1,
1830         };
1831         int did_quota = 0, did_quota_inode = 0;
1832         struct ocfs2_dir_lookup_result lookup = { NULL, };
1833         sigset_t oldset;
1834         int did_block_signals = 0;
1835         struct ocfs2_dentry_lock *dl = NULL;
1836
1837         trace_ocfs2_symlink_begin(dir, dentry, symname,
1838                                   dentry->d_name.len, dentry->d_name.name);
1839
1840         status = dquot_initialize(dir);
1841         if (status) {
1842                 mlog_errno(status);
1843                 goto bail;
1844         }
1845
1846         sb = dir->i_sb;
1847         osb = OCFS2_SB(sb);
1848
1849         l = strlen(symname) + 1;
1850
1851         credits = ocfs2_calc_symlink_credits(sb);
1852
1853         /* lock the parent directory */
1854         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1855         if (status < 0) {
1856                 if (status != -ENOENT)
1857                         mlog_errno(status);
1858                 return status;
1859         }
1860
1861         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1862         if (!ocfs2_read_links_count(dirfe)) {
1863                 /* can't make a file in a deleted directory. */
1864                 status = -ENOENT;
1865                 goto bail;
1866         }
1867
1868         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1869                                            dentry->d_name.len);
1870         if (status)
1871                 goto bail;
1872
1873         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1874                                               dentry->d_name.name,
1875                                               dentry->d_name.len, &lookup);
1876         if (status < 0) {
1877                 mlog_errno(status);
1878                 goto bail;
1879         }
1880
1881         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1882         if (status < 0) {
1883                 if (status != -ENOSPC)
1884                         mlog_errno(status);
1885                 goto bail;
1886         }
1887
1888         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1889         if (IS_ERR(inode)) {
1890                 status = PTR_ERR(inode);
1891                 inode = NULL;
1892                 mlog_errno(status);
1893                 goto bail;
1894         }
1895
1896         /* get security xattr */
1897         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1898         if (status) {
1899                 if (status == -EOPNOTSUPP)
1900                         si.enable = 0;
1901                 else {
1902                         mlog_errno(status);
1903                         goto bail;
1904                 }
1905         }
1906
1907         /* calculate meta data/clusters for setting security xattr */
1908         if (si.enable) {
1909                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1910                                                   &xattr_credits, &xattr_ac);
1911                 if (status < 0) {
1912                         mlog_errno(status);
1913                         goto bail;
1914                 }
1915         }
1916
1917         /* don't reserve bitmap space for fast symlinks. */
1918         if (l > ocfs2_fast_symlink_chars(sb))
1919                 want_clusters += 1;
1920
1921         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1922         if (status < 0) {
1923                 if (status != -ENOSPC)
1924                         mlog_errno(status);
1925                 goto bail;
1926         }
1927
1928         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1929         if (IS_ERR(handle)) {
1930                 status = PTR_ERR(handle);
1931                 handle = NULL;
1932                 mlog_errno(status);
1933                 goto bail;
1934         }
1935
1936         /* Starting to change things, restart is no longer possible. */
1937         ocfs2_block_signals(&oldset);
1938         did_block_signals = 1;
1939
1940         status = dquot_alloc_inode(inode);
1941         if (status)
1942                 goto bail;
1943         did_quota_inode = 1;
1944
1945         trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1946                                    dentry->d_name.name,
1947                                    (unsigned long long)OCFS2_I(dir)->ip_blkno,
1948                                    inode->i_mode);
1949
1950         status = ocfs2_mknod_locked(osb, dir, inode,
1951                                     0, &new_fe_bh, parent_fe_bh, handle,
1952                                     inode_ac);
1953         if (status < 0) {
1954                 mlog_errno(status);
1955                 goto bail;
1956         }
1957
1958         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1959         inode->i_rdev = 0;
1960         newsize = l - 1;
1961         inode->i_op = &ocfs2_symlink_inode_operations;
1962         inode_nohighmem(inode);
1963         if (l > ocfs2_fast_symlink_chars(sb)) {
1964                 u32 offset = 0;
1965
1966                 status = dquot_alloc_space_nodirty(inode,
1967                     ocfs2_clusters_to_bytes(osb->sb, 1));
1968                 if (status)
1969                         goto bail;
1970                 did_quota = 1;
1971                 inode->i_mapping->a_ops = &ocfs2_aops;
1972                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1973                                               new_fe_bh,
1974                                               handle, data_ac, NULL,
1975                                               NULL);
1976                 if (status < 0) {
1977                         if (status != -ENOSPC && status != -EINTR) {
1978                                 mlog(ML_ERROR,
1979                                      "Failed to extend file to %llu\n",
1980                                      (unsigned long long)newsize);
1981                                 mlog_errno(status);
1982                                 status = -ENOSPC;
1983                         }
1984                         goto bail;
1985                 }
1986                 i_size_write(inode, newsize);
1987                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1988         } else {
1989                 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1990                 memcpy((char *) fe->id2.i_symlink, symname, l);
1991                 i_size_write(inode, newsize);
1992                 inode->i_blocks = 0;
1993         }
1994
1995         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1996         if (status < 0) {
1997                 mlog_errno(status);
1998                 goto bail;
1999         }
2000
2001         if (!ocfs2_inode_is_fast_symlink(inode)) {
2002                 status = ocfs2_create_symlink_data(osb, handle, inode,
2003                                                    symname);
2004                 if (status < 0) {
2005                         mlog_errno(status);
2006                         goto bail;
2007                 }
2008         }
2009
2010         if (si.enable) {
2011                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
2012                                                  xattr_ac, data_ac);
2013                 if (status < 0) {
2014                         mlog_errno(status);
2015                         goto bail;
2016                 }
2017         }
2018
2019         /*
2020          * Do this before adding the entry to the directory. We add
2021          * also set d_op after success so that ->d_iput() will cleanup
2022          * the dentry lock even if ocfs2_add_entry() fails below.
2023          */
2024         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2025         if (status) {
2026                 mlog_errno(status);
2027                 goto bail;
2028         }
2029
2030         dl = dentry->d_fsdata;
2031
2032         status = ocfs2_add_entry(handle, dentry, inode,
2033                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
2034                                  &lookup);
2035         if (status < 0) {
2036                 mlog_errno(status);
2037                 goto bail;
2038         }
2039
2040         insert_inode_hash(inode);
2041         d_instantiate(dentry, inode);
2042 bail:
2043         if (status < 0 && did_quota)
2044                 dquot_free_space_nodirty(inode,
2045                                         ocfs2_clusters_to_bytes(osb->sb, 1));
2046         if (status < 0 && did_quota_inode)
2047                 dquot_free_inode(inode);
2048         if (handle) {
2049                 if (status < 0 && fe)
2050                         ocfs2_set_links_count(fe, 0);
2051                 ocfs2_commit_trans(osb, handle);
2052         }
2053
2054         ocfs2_inode_unlock(dir, 1);
2055         if (did_block_signals)
2056                 ocfs2_unblock_signals(&oldset);
2057
2058         brelse(new_fe_bh);
2059         brelse(parent_fe_bh);
2060         kfree(si.value);
2061         ocfs2_free_dir_lookup_result(&lookup);
2062         if (inode_ac)
2063                 ocfs2_free_alloc_context(inode_ac);
2064         if (data_ac)
2065                 ocfs2_free_alloc_context(data_ac);
2066         if (xattr_ac)
2067                 ocfs2_free_alloc_context(xattr_ac);
2068         if ((status < 0) && inode) {
2069                 if (dl)
2070                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2071
2072                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2073                 clear_nlink(inode);
2074                 iput(inode);
2075         }
2076
2077         if (status)
2078                 mlog_errno(status);
2079
2080         return status;
2081 }
2082
2083 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2084 {
2085         int status, namelen;
2086
2087         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2088                            (long long)blkno);
2089         if (namelen <= 0) {
2090                 if (namelen)
2091                         status = namelen;
2092                 else
2093                         status = -EINVAL;
2094                 mlog_errno(status);
2095                 goto bail;
2096         }
2097         if (namelen != OCFS2_ORPHAN_NAMELEN) {
2098                 status = -EINVAL;
2099                 mlog_errno(status);
2100                 goto bail;
2101         }
2102
2103         trace_ocfs2_blkno_stringify(blkno, name, namelen);
2104
2105         status = 0;
2106 bail:
2107         if (status < 0)
2108                 mlog_errno(status);
2109         return status;
2110 }
2111
2112 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2113                                         struct inode **ret_orphan_dir,
2114                                         struct buffer_head **ret_orphan_dir_bh)
2115 {
2116         struct inode *orphan_dir_inode;
2117         struct buffer_head *orphan_dir_bh = NULL;
2118         int ret = 0;
2119
2120         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2121                                                        ORPHAN_DIR_SYSTEM_INODE,
2122                                                        osb->slot_num);
2123         if (!orphan_dir_inode) {
2124                 ret = -ENOENT;
2125                 mlog_errno(ret);
2126                 return ret;
2127         }
2128
2129         inode_lock(orphan_dir_inode);
2130
2131         ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2132         if (ret < 0) {
2133                 inode_unlock(orphan_dir_inode);
2134                 iput(orphan_dir_inode);
2135
2136                 mlog_errno(ret);
2137                 return ret;
2138         }
2139
2140         *ret_orphan_dir = orphan_dir_inode;
2141         *ret_orphan_dir_bh = orphan_dir_bh;
2142
2143         return 0;
2144 }
2145
2146 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2147                                       struct buffer_head *orphan_dir_bh,
2148                                       u64 blkno,
2149                                       char *name,
2150                                       struct ocfs2_dir_lookup_result *lookup,
2151                                       bool dio)
2152 {
2153         int ret;
2154         struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2155         int namelen = dio ?
2156                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2157                         OCFS2_ORPHAN_NAMELEN;
2158
2159         if (dio) {
2160                 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2161                                 OCFS2_DIO_ORPHAN_PREFIX);
2162                 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2163                         ret = -EINVAL;
2164                         mlog_errno(ret);
2165                         return ret;
2166                 }
2167
2168                 ret = ocfs2_blkno_stringify(blkno,
2169                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2170         } else
2171                 ret = ocfs2_blkno_stringify(blkno, name);
2172         if (ret < 0) {
2173                 mlog_errno(ret);
2174                 return ret;
2175         }
2176
2177         ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2178                                            orphan_dir_bh, name,
2179                                            namelen, lookup);
2180         if (ret < 0) {
2181                 mlog_errno(ret);
2182                 return ret;
2183         }
2184
2185         return 0;
2186 }
2187
2188 /**
2189  * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2190  * insertion of an orphan.
2191  * @osb: ocfs2 file system
2192  * @ret_orphan_dir: Orphan dir inode - returned locked!
2193  * @blkno: Actual block number of the inode to be inserted into orphan dir.
2194  * @name: Buffer to store the name of the orphan.
2195  * @lookup: dir lookup result, to be passed back into functions like
2196  *          ocfs2_orphan_add
2197  * @dio: Flag indicating if direct IO is being used or not.
2198  *
2199  * Returns zero on success and the ret_orphan_dir, name and lookup
2200  * fields will be populated.
2201  *
2202  * Returns non-zero on failure.
2203  */
2204 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2205                                     struct inode **ret_orphan_dir,
2206                                     u64 blkno,
2207                                     char *name,
2208                                     struct ocfs2_dir_lookup_result *lookup,
2209                                     bool dio)
2210 {
2211         struct inode *orphan_dir_inode = NULL;
2212         struct buffer_head *orphan_dir_bh = NULL;
2213         int ret = 0;
2214
2215         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2216                                            &orphan_dir_bh);
2217         if (ret < 0) {
2218                 mlog_errno(ret);
2219                 return ret;
2220         }
2221
2222         ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2223                                          blkno, name, lookup, dio);
2224         if (ret < 0) {
2225                 mlog_errno(ret);
2226                 goto out;
2227         }
2228
2229         *ret_orphan_dir = orphan_dir_inode;
2230
2231 out:
2232         brelse(orphan_dir_bh);
2233
2234         if (ret) {
2235                 ocfs2_inode_unlock(orphan_dir_inode, 1);
2236                 inode_unlock(orphan_dir_inode);
2237                 iput(orphan_dir_inode);
2238         }
2239
2240         if (ret)
2241                 mlog_errno(ret);
2242         return ret;
2243 }
2244
2245 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2246                             handle_t *handle,
2247                             struct inode *inode,
2248                             struct buffer_head *fe_bh,
2249                             char *name,
2250                             struct ocfs2_dir_lookup_result *lookup,
2251                             struct inode *orphan_dir_inode,
2252                             bool dio)
2253 {
2254         struct buffer_head *orphan_dir_bh = NULL;
2255         int status = 0;
2256         struct ocfs2_dinode *orphan_fe;
2257         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2258         int namelen = dio ?
2259                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2260                         OCFS2_ORPHAN_NAMELEN;
2261
2262         trace_ocfs2_orphan_add_begin(
2263                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2264
2265         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2266         if (status < 0) {
2267                 mlog_errno(status);
2268                 goto leave;
2269         }
2270
2271         status = ocfs2_journal_access_di(handle,
2272                                          INODE_CACHE(orphan_dir_inode),
2273                                          orphan_dir_bh,
2274                                          OCFS2_JOURNAL_ACCESS_WRITE);
2275         if (status < 0) {
2276                 mlog_errno(status);
2277                 goto leave;
2278         }
2279
2280         /*
2281          * We're going to journal the change of i_flags and i_orphaned_slot.
2282          * It's safe anyway, though some callers may duplicate the journaling.
2283          * Journaling within the func just make the logic look more
2284          * straightforward.
2285          */
2286         status = ocfs2_journal_access_di(handle,
2287                                          INODE_CACHE(inode),
2288                                          fe_bh,
2289                                          OCFS2_JOURNAL_ACCESS_WRITE);
2290         if (status < 0) {
2291                 mlog_errno(status);
2292                 goto leave;
2293         }
2294
2295         /* we're a cluster, and nlink can change on disk from
2296          * underneath us... */
2297         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2298         if (S_ISDIR(inode->i_mode))
2299                 ocfs2_add_links_count(orphan_fe, 1);
2300         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2301         ocfs2_journal_dirty(handle, orphan_dir_bh);
2302
2303         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2304                                    namelen, inode,
2305                                    OCFS2_I(inode)->ip_blkno,
2306                                    orphan_dir_bh, lookup);
2307         if (status < 0) {
2308                 mlog_errno(status);
2309                 goto rollback;
2310         }
2311
2312         if (dio) {
2313                 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2314                  * slot.
2315                  */
2316                 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2317                 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2318         } else {
2319                 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2320                 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2321
2322                 /* Record which orphan dir our inode now resides
2323                  * in. delete_inode will use this to determine which orphan
2324                  * dir to lock. */
2325                 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2326         }
2327
2328         ocfs2_journal_dirty(handle, fe_bh);
2329
2330         trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2331                                    osb->slot_num);
2332
2333 rollback:
2334         if (status < 0) {
2335                 if (S_ISDIR(inode->i_mode))
2336                         ocfs2_add_links_count(orphan_fe, -1);
2337                 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2338         }
2339
2340 leave:
2341         brelse(orphan_dir_bh);
2342
2343         return status;
2344 }
2345
2346 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2347 int ocfs2_orphan_del(struct ocfs2_super *osb,
2348                      handle_t *handle,
2349                      struct inode *orphan_dir_inode,
2350                      struct inode *inode,
2351                      struct buffer_head *orphan_dir_bh,
2352                      bool dio)
2353 {
2354         char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2355         struct ocfs2_dinode *orphan_fe;
2356         int status = 0;
2357         struct ocfs2_dir_lookup_result lookup = { NULL, };
2358
2359         if (dio) {
2360                 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2361                                 OCFS2_DIO_ORPHAN_PREFIX);
2362                 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2363                         status = -EINVAL;
2364                         mlog_errno(status);
2365                         return status;
2366                 }
2367
2368                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2369                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2370         } else
2371                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2372         if (status < 0) {
2373                 mlog_errno(status);
2374                 goto leave;
2375         }
2376
2377         trace_ocfs2_orphan_del(
2378              (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2379              name, strlen(name));
2380
2381         status = ocfs2_journal_access_di(handle,
2382                                          INODE_CACHE(orphan_dir_inode),
2383                                          orphan_dir_bh,
2384                                          OCFS2_JOURNAL_ACCESS_WRITE);
2385         if (status < 0) {
2386                 mlog_errno(status);
2387                 goto leave;
2388         }
2389
2390         /* find it's spot in the orphan directory */
2391         status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2392                                   &lookup);
2393         if (status) {
2394                 mlog_errno(status);
2395                 goto leave;
2396         }
2397
2398         /* remove it from the orphan directory */
2399         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2400         if (status < 0) {
2401                 mlog_errno(status);
2402                 goto leave;
2403         }
2404
2405         /* do the i_nlink dance! :) */
2406         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2407         if (S_ISDIR(inode->i_mode))
2408                 ocfs2_add_links_count(orphan_fe, -1);
2409         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2410         ocfs2_journal_dirty(handle, orphan_dir_bh);
2411
2412 leave:
2413         ocfs2_free_dir_lookup_result(&lookup);
2414
2415         if (status)
2416                 mlog_errno(status);
2417         return status;
2418 }
2419
2420 /**
2421  * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2422  * allocated file. This is different from the typical 'add to orphan dir'
2423  * operation in that the inode does not yet exist. This is a problem because
2424  * the orphan dir stringifies the inode block number to come up with it's
2425  * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2426  * problem. This function works around it by calling deeper into the orphan
2427  * and suballoc code than other callers. Use this only by necessity.
2428  * @dir: The directory which this inode will ultimately wind up under - not the
2429  * orphan dir!
2430  * @dir_bh: buffer_head the @dir inode block
2431  * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2432  * with the string to be used for orphan dirent. Pass back to the orphan dir
2433  * code.
2434  * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2435  * dir code.
2436  * @ret_di_blkno: block number where the new inode will be allocated.
2437  * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2438  * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2439  *
2440  * Returns zero on success and the ret_orphan_dir, name and lookup
2441  * fields will be populated.
2442  *
2443  * Returns non-zero on failure.
2444  */
2445 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2446                                         struct buffer_head *dir_bh,
2447                                         char *orphan_name,
2448                                         struct inode **ret_orphan_dir,
2449                                         u64 *ret_di_blkno,
2450                                         struct ocfs2_dir_lookup_result *orphan_insert,
2451                                         struct ocfs2_alloc_context **ret_inode_ac)
2452 {
2453         int ret;
2454         u64 di_blkno;
2455         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2456         struct inode *orphan_dir = NULL;
2457         struct buffer_head *orphan_dir_bh = NULL;
2458         struct ocfs2_alloc_context *inode_ac = NULL;
2459
2460         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2461         if (ret < 0) {
2462                 mlog_errno(ret);
2463                 return ret;
2464         }
2465
2466         /* reserve an inode spot */
2467         ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2468         if (ret < 0) {
2469                 if (ret != -ENOSPC)
2470                         mlog_errno(ret);
2471                 goto out;
2472         }
2473
2474         ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2475                                        &di_blkno);
2476         if (ret) {
2477                 mlog_errno(ret);
2478                 goto out;
2479         }
2480
2481         ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2482                                          di_blkno, orphan_name, orphan_insert,
2483                                          false);
2484         if (ret < 0) {
2485                 mlog_errno(ret);
2486                 goto out;
2487         }
2488
2489 out:
2490         if (ret == 0) {
2491                 *ret_orphan_dir = orphan_dir;
2492                 *ret_di_blkno = di_blkno;
2493                 *ret_inode_ac = inode_ac;
2494                 /*
2495                  * orphan_name and orphan_insert are already up to
2496                  * date via prepare_orphan_dir
2497                  */
2498         } else {
2499                 /* Unroll reserve_new_inode* */
2500                 if (inode_ac)
2501                         ocfs2_free_alloc_context(inode_ac);
2502
2503                 /* Unroll orphan dir locking */
2504                 inode_unlock(orphan_dir);
2505                 ocfs2_inode_unlock(orphan_dir, 1);
2506                 iput(orphan_dir);
2507         }
2508
2509         brelse(orphan_dir_bh);
2510
2511         return ret;
2512 }
2513
2514 int ocfs2_create_inode_in_orphan(struct inode *dir,
2515                                  int mode,
2516                                  struct inode **new_inode)
2517 {
2518         int status, did_quota_inode = 0;
2519         struct inode *inode = NULL;
2520         struct inode *orphan_dir = NULL;
2521         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2522         handle_t *handle = NULL;
2523         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2524         struct buffer_head *parent_di_bh = NULL;
2525         struct buffer_head *new_di_bh = NULL;
2526         struct ocfs2_alloc_context *inode_ac = NULL;
2527         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2528         u64 di_blkno, suballoc_loc;
2529         u16 suballoc_bit;
2530
2531         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2532         if (status < 0) {
2533                 if (status != -ENOENT)
2534                         mlog_errno(status);
2535                 return status;
2536         }
2537
2538         status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2539                                               orphan_name, &orphan_dir,
2540                                               &di_blkno, &orphan_insert, &inode_ac);
2541         if (status < 0) {
2542                 if (status != -ENOSPC)
2543                         mlog_errno(status);
2544                 goto leave;
2545         }
2546
2547         inode = ocfs2_get_init_inode(dir, mode);
2548         if (IS_ERR(inode)) {
2549                 status = PTR_ERR(inode);
2550                 inode = NULL;
2551                 mlog_errno(status);
2552                 goto leave;
2553         }
2554
2555         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2556         if (IS_ERR(handle)) {
2557                 status = PTR_ERR(handle);
2558                 handle = NULL;
2559                 mlog_errno(status);
2560                 goto leave;
2561         }
2562
2563         status = dquot_alloc_inode(inode);
2564         if (status)
2565                 goto leave;
2566         did_quota_inode = 1;
2567
2568         status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2569                                               &suballoc_loc,
2570                                               &suballoc_bit, di_blkno);
2571         if (status < 0) {
2572                 mlog_errno(status);
2573                 goto leave;
2574         }
2575
2576         clear_nlink(inode);
2577         /* do the real work now. */
2578         status = __ocfs2_mknod_locked(dir, inode,
2579                                       0, &new_di_bh, parent_di_bh, handle,
2580                                       inode_ac, di_blkno, suballoc_loc,
2581                                       suballoc_bit);
2582         if (status < 0) {
2583                 mlog_errno(status);
2584                 goto leave;
2585         }
2586
2587         status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2588                                   &orphan_insert, orphan_dir, false);
2589         if (status < 0) {
2590                 mlog_errno(status);
2591                 goto leave;
2592         }
2593
2594         /* get open lock so that only nodes can't remove it from orphan dir. */
2595         status = ocfs2_open_lock(inode);
2596         if (status < 0)
2597                 mlog_errno(status);
2598
2599         insert_inode_hash(inode);
2600 leave:
2601         if (status < 0 && did_quota_inode)
2602                 dquot_free_inode(inode);
2603         if (handle)
2604                 ocfs2_commit_trans(osb, handle);
2605
2606         if (orphan_dir) {
2607                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2608                 ocfs2_inode_unlock(orphan_dir, 1);
2609                 inode_unlock(orphan_dir);
2610                 iput(orphan_dir);
2611         }
2612
2613         if ((status < 0) && inode) {
2614                 clear_nlink(inode);
2615                 iput(inode);
2616         }
2617
2618         if (inode_ac)
2619                 ocfs2_free_alloc_context(inode_ac);
2620
2621         brelse(new_di_bh);
2622
2623         if (!status)
2624                 *new_inode = inode;
2625
2626         ocfs2_free_dir_lookup_result(&orphan_insert);
2627
2628         ocfs2_inode_unlock(dir, 1);
2629         brelse(parent_di_bh);
2630         return status;
2631 }
2632
2633 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2634         struct inode *inode)
2635 {
2636         char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2637         struct inode *orphan_dir_inode = NULL;
2638         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2639         struct buffer_head *di_bh = NULL;
2640         int status = 0;
2641         handle_t *handle = NULL;
2642         struct ocfs2_dinode *di = NULL;
2643
2644         status = ocfs2_inode_lock(inode, &di_bh, 1);
2645         if (status < 0) {
2646                 mlog_errno(status);
2647                 goto bail;
2648         }
2649
2650         di = (struct ocfs2_dinode *) di_bh->b_data;
2651         /*
2652          * Another append dio crashed?
2653          * If so, manually recover it first.
2654          */
2655         if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2656                 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2657                 if (status < 0) {
2658                         if (status != -ENOSPC)
2659                                 mlog_errno(status);
2660                         goto bail_unlock_inode;
2661                 }
2662
2663                 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2664                 if (status < 0) {
2665                         mlog_errno(status);
2666                         goto bail_unlock_inode;
2667                 }
2668         }
2669
2670         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2671                         OCFS2_I(inode)->ip_blkno,
2672                         orphan_name,
2673                         &orphan_insert,
2674                         true);
2675         if (status < 0) {
2676                 mlog_errno(status);
2677                 goto bail_unlock_inode;
2678         }
2679
2680         handle = ocfs2_start_trans(osb,
2681                         OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2682         if (IS_ERR(handle)) {
2683                 status = PTR_ERR(handle);
2684                 goto bail_unlock_orphan;
2685         }
2686
2687         status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2688                         &orphan_insert, orphan_dir_inode, true);
2689         if (status)
2690                 mlog_errno(status);
2691
2692         ocfs2_commit_trans(osb, handle);
2693
2694 bail_unlock_orphan:
2695         ocfs2_inode_unlock(orphan_dir_inode, 1);
2696         inode_unlock(orphan_dir_inode);
2697         iput(orphan_dir_inode);
2698
2699         ocfs2_free_dir_lookup_result(&orphan_insert);
2700
2701 bail_unlock_inode:
2702         ocfs2_inode_unlock(inode, 1);
2703         brelse(di_bh);
2704
2705 bail:
2706         return status;
2707 }
2708
2709 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2710                 struct inode *inode, struct buffer_head *di_bh,
2711                 int update_isize, loff_t end)
2712 {
2713         struct inode *orphan_dir_inode = NULL;
2714         struct buffer_head *orphan_dir_bh = NULL;
2715         struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2716         handle_t *handle = NULL;
2717         int status = 0;
2718
2719         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2720                         ORPHAN_DIR_SYSTEM_INODE,
2721                         le16_to_cpu(di->i_dio_orphaned_slot));
2722         if (!orphan_dir_inode) {
2723                 status = -ENOENT;
2724                 mlog_errno(status);
2725                 goto bail;
2726         }
2727
2728         inode_lock(orphan_dir_inode);
2729         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2730         if (status < 0) {
2731                 inode_unlock(orphan_dir_inode);
2732                 iput(orphan_dir_inode);
2733                 mlog_errno(status);
2734                 goto bail;
2735         }
2736
2737         handle = ocfs2_start_trans(osb,
2738                         OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2739         if (IS_ERR(handle)) {
2740                 status = PTR_ERR(handle);
2741                 goto bail_unlock_orphan;
2742         }
2743
2744         BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2745
2746         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2747                                 inode, orphan_dir_bh, true);
2748         if (status < 0) {
2749                 mlog_errno(status);
2750                 goto bail_commit;
2751         }
2752
2753         status = ocfs2_journal_access_di(handle,
2754                         INODE_CACHE(inode),
2755                         di_bh,
2756                         OCFS2_JOURNAL_ACCESS_WRITE);
2757         if (status < 0) {
2758                 mlog_errno(status);
2759                 goto bail_commit;
2760         }
2761
2762         di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2763         di->i_dio_orphaned_slot = 0;
2764
2765         if (update_isize) {
2766                 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2767                 if (status)
2768                         mlog_errno(status);
2769         } else
2770                 ocfs2_journal_dirty(handle, di_bh);
2771
2772 bail_commit:
2773         ocfs2_commit_trans(osb, handle);
2774
2775 bail_unlock_orphan:
2776         ocfs2_inode_unlock(orphan_dir_inode, 1);
2777         inode_unlock(orphan_dir_inode);
2778         brelse(orphan_dir_bh);
2779         iput(orphan_dir_inode);
2780
2781 bail:
2782         return status;
2783 }
2784
2785 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2786                                    struct inode *inode,
2787                                    struct dentry *dentry)
2788 {
2789         int status = 0;
2790         struct buffer_head *parent_di_bh = NULL;
2791         handle_t *handle = NULL;
2792         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2793         struct ocfs2_dinode *dir_di, *di;
2794         struct inode *orphan_dir_inode = NULL;
2795         struct buffer_head *orphan_dir_bh = NULL;
2796         struct buffer_head *di_bh = NULL;
2797         struct ocfs2_dir_lookup_result lookup = { NULL, };
2798
2799         trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2800                                 dentry->d_name.len, dentry->d_name.name,
2801                                 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2802                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2803
2804         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2805         if (status < 0) {
2806                 if (status != -ENOENT)
2807                         mlog_errno(status);
2808                 return status;
2809         }
2810
2811         dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2812         if (!dir_di->i_links_count) {
2813                 /* can't make a file in a deleted directory. */
2814                 status = -ENOENT;
2815                 goto leave;
2816         }
2817
2818         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2819                                            dentry->d_name.len);
2820         if (status)
2821                 goto leave;
2822
2823         /* get a spot inside the dir. */
2824         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2825                                               dentry->d_name.name,
2826                                               dentry->d_name.len, &lookup);
2827         if (status < 0) {
2828                 mlog_errno(status);
2829                 goto leave;
2830         }
2831
2832         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2833                                                        ORPHAN_DIR_SYSTEM_INODE,
2834                                                        osb->slot_num);
2835         if (!orphan_dir_inode) {
2836                 status = -ENOENT;
2837                 mlog_errno(status);
2838                 goto leave;
2839         }
2840
2841         inode_lock(orphan_dir_inode);
2842
2843         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2844         if (status < 0) {
2845                 mlog_errno(status);
2846                 inode_unlock(orphan_dir_inode);
2847                 iput(orphan_dir_inode);
2848                 goto leave;
2849         }
2850
2851         status = ocfs2_read_inode_block(inode, &di_bh);
2852         if (status < 0) {
2853                 mlog_errno(status);
2854                 goto orphan_unlock;
2855         }
2856
2857         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2858         if (IS_ERR(handle)) {
2859                 status = PTR_ERR(handle);
2860                 handle = NULL;
2861                 mlog_errno(status);
2862                 goto orphan_unlock;
2863         }
2864
2865         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2866                                          di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2867         if (status < 0) {
2868                 mlog_errno(status);
2869                 goto out_commit;
2870         }
2871
2872         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2873                                   orphan_dir_bh, false);
2874         if (status < 0) {
2875                 mlog_errno(status);
2876                 goto out_commit;
2877         }
2878
2879         di = (struct ocfs2_dinode *)di_bh->b_data;
2880         di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2881         di->i_orphaned_slot = 0;
2882         set_nlink(inode, 1);
2883         ocfs2_set_links_count(di, inode->i_nlink);
2884         ocfs2_update_inode_fsync_trans(handle, inode, 1);
2885         ocfs2_journal_dirty(handle, di_bh);
2886
2887         status = ocfs2_add_entry(handle, dentry, inode,
2888                                  OCFS2_I(inode)->ip_blkno, parent_di_bh,
2889                                  &lookup);
2890         if (status < 0) {
2891                 mlog_errno(status);
2892                 goto out_commit;
2893         }
2894
2895         status = ocfs2_dentry_attach_lock(dentry, inode,
2896                                           OCFS2_I(dir)->ip_blkno);
2897         if (status) {
2898                 mlog_errno(status);
2899                 goto out_commit;
2900         }
2901
2902         d_instantiate(dentry, inode);
2903         status = 0;
2904 out_commit:
2905         ocfs2_commit_trans(osb, handle);
2906 orphan_unlock:
2907         ocfs2_inode_unlock(orphan_dir_inode, 1);
2908         inode_unlock(orphan_dir_inode);
2909         iput(orphan_dir_inode);
2910 leave:
2911
2912         ocfs2_inode_unlock(dir, 1);
2913
2914         brelse(di_bh);
2915         brelse(parent_di_bh);
2916         brelse(orphan_dir_bh);
2917
2918         ocfs2_free_dir_lookup_result(&lookup);
2919
2920         if (status)
2921                 mlog_errno(status);
2922
2923         return status;
2924 }
2925
2926 const struct inode_operations ocfs2_dir_iops = {
2927         .create         = ocfs2_create,
2928         .lookup         = ocfs2_lookup,
2929         .link           = ocfs2_link,
2930         .unlink         = ocfs2_unlink,
2931         .rmdir          = ocfs2_unlink,
2932         .symlink        = ocfs2_symlink,
2933         .mkdir          = ocfs2_mkdir,
2934         .mknod          = ocfs2_mknod,
2935         .rename         = ocfs2_rename,
2936         .setattr        = ocfs2_setattr,
2937         .getattr        = ocfs2_getattr,
2938         .permission     = ocfs2_permission,
2939         .listxattr      = ocfs2_listxattr,
2940         .fiemap         = ocfs2_fiemap,
2941         .get_inode_acl  = ocfs2_iop_get_acl,
2942         .set_acl        = ocfs2_iop_set_acl,
2943         .fileattr_get   = ocfs2_fileattr_get,
2944         .fileattr_set   = ocfs2_fileattr_set,
2945 };