fs/ocfs2/namei.c

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