fs/ocfs2/namei.c

   1 /* -*- mode: c; c-basic-offset: 8; -*-
   2  * vim: noexpandtab sw=8 ts=8 sts=0:
   3  *
   4  * namei.c
   5  *
   6  * Create and rename file, directory, symlinks
   7  *
   8  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
   9  *
  10  *  Portions of this code from linux/fs/ext3/dir.c
  11  *
  12  *  Copyright (C) 1992, 1993, 1994, 1995
  13  *  Remy Card (card@masi.ibp.fr)
  14  *  Laboratoire MASI - Institut Blaise pascal
  15  *  Universite Pierre et Marie Curie (Paris VI)
  16  *
  17  *   from
  18  *
  19  *   linux/fs/minix/dir.c
  20  *
  21  *   Copyright (C) 1991, 1992 Linux Torvalds
  22  *
  23  * This program is free software; you can redistribute it and/or
  24  * modify it under the terms of the GNU General Public
  25  * License as published by the Free Software Foundation; either
  26  * version 2 of the License, or (at your option) any later version.
  27  *
  28  * This program is distributed in the hope that it will be useful,
  29  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  30  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  31  * General Public License for more details.
  32  *
  33  * You should have received a copy of the GNU General Public
  34  * License along with this program; if not, write to the
  35  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  36  * Boston, MA 021110-1307, USA.
  37  */
  38
  39 #include <linux/fs.h>
  40 #include <linux/types.h>
  41 #include <linux/slab.h>
  42 #include <linux/highmem.h>
  43 #include <linux/quotaops.h>
  44
  45 #include <cluster/masklog.h>
  46
  47 #include "ocfs2.h"
  48
  49 #include "alloc.h"
  50 #include "dcache.h"
  51 #include "dir.h"
  52 #include "dlmglue.h"
  53 #include "extent_map.h"
  54 #include "file.h"
  55 #include "inode.h"
  56 #include "journal.h"
  57 #include "namei.h"
  58 #include "suballoc.h"
  59 #include "super.h"
  60 #include "symlink.h"
  61 #include "sysfile.h"
  62 #include "uptodate.h"
  63 #include "xattr.h"
  64 #include "acl.h"
  65 #include "ocfs2_trace.h"
  66
  67 #include "buffer_head_io.h"
  68
  69 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
  70                               struct inode *dir,
  71                               struct inode *inode,
  72                               dev_t dev,
  73                               struct buffer_head **new_fe_bh,
  74                               struct buffer_head *parent_fe_bh,
  75                               handle_t *handle,
  76                               struct ocfs2_alloc_context *inode_ac);
  77
  78 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
  79                                     struct inode **ret_orphan_dir,
  80                                     u64 blkno,
  81                                     char *name,
  82                                     struct ocfs2_dir_lookup_result *lookup,
  83                                     bool dio);
  84
  85 static int ocfs2_orphan_add(struct ocfs2_super *osb,
  86                             handle_t *handle,
  87                             struct inode *inode,
  88                             struct buffer_head *fe_bh,
  89                             char *name,
  90                             struct ocfs2_dir_lookup_result *lookup,
  91                             struct inode *orphan_dir_inode,
  92                             bool dio);
  93
  94 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
  95                                      handle_t *handle,
  96                                      struct inode *inode,
  97                                      const char *symname);
  98
  99 static int ocfs2_double_lock(struct ocfs2_super *osb,
 100                              struct buffer_head **bh1,
 101                              struct inode *inode1,
 102                              struct buffer_head **bh2,
 103                              struct inode *inode2,
 104                              int rename);
 105
 106 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
 107 /* An orphan dir name is an 8 byte value, printed as a hex string */
 108 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
 109
 110 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
 111                                    unsigned int flags)
 112 {
 113         int status;
 114         u64 blkno;
 115         struct inode *inode = NULL;
 116         struct dentry *ret;
 117         struct ocfs2_inode_info *oi;
 118
 119         trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
 120                            dentry->d_name.name,
 121                            (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
 122
 123         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
 124                 ret = ERR_PTR(-ENAMETOOLONG);
 125                 goto bail;
 126         }
 127
 128         status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
 129         if (status < 0) {
 130                 if (status != -ENOENT)
 131                         mlog_errno(status);
 132                 ret = ERR_PTR(status);
 133                 goto bail;
 134         }
 135
 136         status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
 137                                             dentry->d_name.len, &blkno);
 138         if (status < 0)
 139                 goto bail_add;
 140
 141         inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
 142         if (IS_ERR(inode)) {
 143                 ret = ERR_PTR(-EACCES);
 144                 goto bail_unlock;
 145         }
 146
 147         oi = OCFS2_I(inode);
 148         /* Clear any orphaned state... If we were able to look up the
 149          * inode from a directory, it certainly can't be orphaned. We
 150          * might have the bad state from a node which intended to
 151          * orphan this inode but crashed before it could commit the
 152          * unlink. */
 153         spin_lock(&oi->ip_lock);
 154         oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
 155         spin_unlock(&oi->ip_lock);
 156
 157 bail_add:
 158         ret = d_splice_alias(inode, dentry);
 159
 160         if (inode) {
 161                 /*
 162                  * If d_splice_alias() finds a DCACHE_DISCONNECTED
 163                  * dentry, it will d_move() it on top of ourse. The
 164                  * return value will indicate this however, so in
 165                  * those cases, we switch them around for the locking
 166                  * code.
 167                  *
 168                  * NOTE: This dentry already has ->d_op set from
 169                  * ocfs2_get_parent() and ocfs2_get_dentry()
 170                  */
 171                 if (!IS_ERR_OR_NULL(ret))
 172                         dentry = ret;
 173
 174                 status = ocfs2_dentry_attach_lock(dentry, inode,
 175                                                   OCFS2_I(dir)->ip_blkno);
 176                 if (status) {
 177                         mlog_errno(status);
 178                         ret = ERR_PTR(status);
 179                         goto bail_unlock;
 180                 }
 181         } else
 182                 ocfs2_dentry_attach_gen(dentry);
 183
 184 bail_unlock:
 185         /* Don't drop the cluster lock until *after* the d_add --
 186          * unlink on another node will message us to remove that
 187          * dentry under this lock so otherwise we can race this with
 188          * the downconvert thread and have a stale dentry. */
 189         ocfs2_inode_unlock(dir, 0);
 190
 191 bail:
 192
 193         trace_ocfs2_lookup_ret(ret);
 194
 195         return ret;
 196 }
 197
 198 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
 199 {
 200         struct inode *inode;
 201         int status;
 202
 203         inode = new_inode(dir->i_sb);
 204         if (!inode) {
 205                 mlog(ML_ERROR, "new_inode failed!\n");
 206                 return ERR_PTR(-ENOMEM);
 207         }
 208
 209         /* populate as many fields early on as possible - many of
 210          * these are used by the support functions here and in
 211          * callers. */
 212         if (S_ISDIR(mode))
 213                 set_nlink(inode, 2);
 214         inode_init_owner(inode, dir, mode);
 215         status = dquot_initialize(inode);
 216         if (status)
 217                 return ERR_PTR(status);
 218
 219         return inode;
 220 }
 221
 222 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
 223                 struct dentry *dentry, struct inode *inode)
 224 {
 225         struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
 226
 227         ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
 228         ocfs2_lock_res_free(&dl->dl_lockres);
 229         BUG_ON(dl->dl_count != 1);
 230         spin_lock(&dentry_attach_lock);
 231         dentry->d_fsdata = NULL;
 232         spin_unlock(&dentry_attach_lock);
 233         kfree(dl);
 234         iput(inode);
 235 }
 236
 237 static int ocfs2_mknod(struct inode *dir,
 238                        struct dentry *dentry,
 239                        umode_t mode,
 240                        dev_t dev)
 241 {
 242         int status = 0;
 243         struct buffer_head *parent_fe_bh = NULL;
 244         handle_t *handle = NULL;
 245         struct ocfs2_super *osb;
 246         struct ocfs2_dinode *dirfe;
 247         struct ocfs2_dinode *fe = NULL;
 248         struct buffer_head *new_fe_bh = NULL;
 249         struct inode *inode = NULL;
 250         struct ocfs2_alloc_context *inode_ac = NULL;
 251         struct ocfs2_alloc_context *data_ac = NULL;
 252         struct ocfs2_alloc_context *meta_ac = NULL;
 253         int want_clusters = 0;
 254         int want_meta = 0;
 255         int xattr_credits = 0;
 256         struct ocfs2_security_xattr_info si = {
 257                 .enable = 1,
 258         };
 259         int did_quota_inode = 0;
 260         struct ocfs2_dir_lookup_result lookup = { NULL, };
 261         sigset_t oldset;
 262         int did_block_signals = 0;
 263         struct ocfs2_dentry_lock *dl = NULL;
 264
 265         trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 266                           (unsigned long long)OCFS2_I(dir)->ip_blkno,
 267                           (unsigned long)dev, mode);
 268
 269         status = dquot_initialize(dir);
 270         if (status) {
 271                 mlog_errno(status);
 272                 return status;
 273         }
 274
 275         /* get our super block */
 276         osb = OCFS2_SB(dir->i_sb);
 277
 278         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
 279         if (status < 0) {
 280                 if (status != -ENOENT)
 281                         mlog_errno(status);
 282                 return status;
 283         }
 284
 285         if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
 286                 status = -EMLINK;
 287                 goto leave;
 288         }
 289
 290         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
 291         if (!ocfs2_read_links_count(dirfe)) {
 292                 /* can't make a file in a deleted directory. */
 293                 status = -ENOENT;
 294                 goto leave;
 295         }
 296
 297         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 298                                            dentry->d_name.len);
 299         if (status)
 300                 goto leave;
 301
 302         /* get a spot inside the dir. */
 303         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 304                                               dentry->d_name.name,
 305                                               dentry->d_name.len, &lookup);
 306         if (status < 0) {
 307                 mlog_errno(status);
 308                 goto leave;
 309         }
 310
 311         /* reserve an inode spot */
 312         status = ocfs2_reserve_new_inode(osb, &inode_ac);
 313         if (status < 0) {
 314                 if (status != -ENOSPC)
 315                         mlog_errno(status);
 316                 goto leave;
 317         }
 318
 319         inode = ocfs2_get_init_inode(dir, mode);
 320         if (IS_ERR(inode)) {
 321                 status = PTR_ERR(inode);
 322                 inode = NULL;
 323                 mlog_errno(status);
 324                 goto leave;
 325         }
 326
 327         /* get security xattr */
 328         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
 329         if (status) {
 330                 if (status == -EOPNOTSUPP)
 331                         si.enable = 0;
 332                 else {
 333                         mlog_errno(status);
 334                         goto leave;
 335                 }
 336         }
 337
 338         /* calculate meta data/clusters for setting security and acl xattr */
 339         status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
 340                                        &si, &want_clusters,
 341                                        &xattr_credits, &want_meta);
 342         if (status < 0) {
 343                 mlog_errno(status);
 344                 goto leave;
 345         }
 346
 347         /* Reserve a cluster if creating an extent based directory. */
 348         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
 349                 want_clusters += 1;
 350
 351                 /* Dir indexing requires extra space as well */
 352                 if (ocfs2_supports_indexed_dirs(osb))
 353                         want_meta++;
 354         }
 355
 356         status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
 357         if (status < 0) {
 358                 if (status != -ENOSPC)
 359                         mlog_errno(status);
 360                 goto leave;
 361         }
 362
 363         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
 364         if (status < 0) {
 365                 if (status != -ENOSPC)
 366                         mlog_errno(status);
 367                 goto leave;
 368         }
 369
 370         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
 371                                                             S_ISDIR(mode),
 372                                                             xattr_credits));
 373         if (IS_ERR(handle)) {
 374                 status = PTR_ERR(handle);
 375                 handle = NULL;
 376                 mlog_errno(status);
 377                 goto leave;
 378         }
 379
 380         /* Starting to change things, restart is no longer possible. */
 381         ocfs2_block_signals(&oldset);
 382         did_block_signals = 1;
 383
 384         status = dquot_alloc_inode(inode);
 385         if (status)
 386                 goto leave;
 387         did_quota_inode = 1;
 388
 389         /* do the real work now. */
 390         status = ocfs2_mknod_locked(osb, dir, inode, dev,
 391                                     &new_fe_bh, parent_fe_bh, handle,
 392                                     inode_ac);
 393         if (status < 0) {
 394                 mlog_errno(status);
 395                 goto leave;
 396         }
 397
 398         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
 399         if (S_ISDIR(mode)) {
 400                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
 401                                             new_fe_bh, data_ac, meta_ac);
 402                 if (status < 0) {
 403                         mlog_errno(status);
 404                         goto leave;
 405                 }
 406
 407                 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
 408                                                  parent_fe_bh,
 409                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 410                 if (status < 0) {
 411                         mlog_errno(status);
 412                         goto leave;
 413                 }
 414                 ocfs2_add_links_count(dirfe, 1);
 415                 ocfs2_journal_dirty(handle, parent_fe_bh);
 416                 inc_nlink(dir);
 417         }
 418
 419         status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
 420                          meta_ac, data_ac);
 421
 422         if (status < 0) {
 423                 mlog_errno(status);
 424                 goto leave;
 425         }
 426
 427         if (si.enable) {
 428                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
 429                                                  meta_ac, data_ac);
 430                 if (status < 0) {
 431                         mlog_errno(status);
 432                         goto leave;
 433                 }
 434         }
 435
 436         /*
 437          * Do this before adding the entry to the directory. We add
 438          * also set d_op after success so that ->d_iput() will cleanup
 439          * the dentry lock even if ocfs2_add_entry() fails below.
 440          */
 441         status = ocfs2_dentry_attach_lock(dentry, inode,
 442                                           OCFS2_I(dir)->ip_blkno);
 443         if (status) {
 444                 mlog_errno(status);
 445                 goto leave;
 446         }
 447
 448         dl = dentry->d_fsdata;
 449
 450         status = ocfs2_add_entry(handle, dentry, inode,
 451                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
 452                                  &lookup);
 453         if (status < 0) {
 454                 mlog_errno(status);
 455                 goto leave;
 456         }
 457
 458         insert_inode_hash(inode);
 459         d_instantiate(dentry, inode);
 460         status = 0;
 461 leave:
 462         if (status < 0 && did_quota_inode)
 463                 dquot_free_inode(inode);
 464         if (handle) {
 465                 if (status < 0 && fe)
 466                         ocfs2_set_links_count(fe, 0);
 467                 ocfs2_commit_trans(osb, handle);
 468         }
 469
 470         ocfs2_inode_unlock(dir, 1);
 471         if (did_block_signals)
 472                 ocfs2_unblock_signals(&oldset);
 473
 474         brelse(new_fe_bh);
 475         brelse(parent_fe_bh);
 476         kfree(si.value);
 477
 478         ocfs2_free_dir_lookup_result(&lookup);
 479
 480         if (inode_ac)
 481                 ocfs2_free_alloc_context(inode_ac);
 482
 483         if (data_ac)
 484                 ocfs2_free_alloc_context(data_ac);
 485
 486         if (meta_ac)
 487                 ocfs2_free_alloc_context(meta_ac);
 488
 489         /*
 490          * We should call iput after the i_mutex of the bitmap been
 491          * unlocked in ocfs2_free_alloc_context, or the
 492          * ocfs2_delete_inode will mutex_lock again.
 493          */
 494         if ((status < 0) && inode) {
 495                 if (dl)
 496                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
 497
 498                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
 499                 clear_nlink(inode);
 500                 iput(inode);
 501         }
 502
 503         if (status)
 504                 mlog_errno(status);
 505
 506         return status;
 507 }
 508
 509 static int __ocfs2_mknod_locked(struct inode *dir,
 510                                 struct inode *inode,
 511                                 dev_t dev,
 512                                 struct buffer_head **new_fe_bh,
 513                                 struct buffer_head *parent_fe_bh,
 514                                 handle_t *handle,
 515                                 struct ocfs2_alloc_context *inode_ac,
 516                                 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
 517 {
 518         int status = 0;
 519         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 520         struct ocfs2_dinode *fe = NULL;
 521         struct ocfs2_extent_list *fel;
 522         u16 feat;
 523         struct ocfs2_inode_info *oi = OCFS2_I(inode);
 524         struct timespec64 ts;
 525
 526         *new_fe_bh = NULL;
 527
 528         /* populate as many fields early on as possible - many of
 529          * these are used by the support functions here and in
 530          * callers. */
 531         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
 532         OCFS2_I(inode)->ip_blkno = fe_blkno;
 533         spin_lock(&osb->osb_lock);
 534         inode->i_generation = osb->s_next_generation++;
 535         spin_unlock(&osb->osb_lock);
 536
 537         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
 538         if (!*new_fe_bh) {
 539                 status = -ENOMEM;
 540                 mlog_errno(status);
 541                 goto leave;
 542         }
 543         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
 544
 545         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
 546                                          *new_fe_bh,
 547                                          OCFS2_JOURNAL_ACCESS_CREATE);
 548         if (status < 0) {
 549                 mlog_errno(status);
 550                 goto leave;
 551         }
 552
 553         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
 554         memset(fe, 0, osb->sb->s_blocksize);
 555
 556         fe->i_generation = cpu_to_le32(inode->i_generation);
 557         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
 558         fe->i_blkno = cpu_to_le64(fe_blkno);
 559         fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
 560         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
 561         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
 562         fe->i_uid = cpu_to_le32(i_uid_read(inode));
 563         fe->i_gid = cpu_to_le32(i_gid_read(inode));
 564         fe->i_mode = cpu_to_le16(inode->i_mode);
 565         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 566                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
 567
 568         ocfs2_set_links_count(fe, inode->i_nlink);
 569
 570         fe->i_last_eb_blk = 0;
 571         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 572         fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
 573         ktime_get_real_ts64(&ts);
 574         fe->i_atime = fe->i_ctime = fe->i_mtime =
 575                 cpu_to_le64(ts.tv_sec);
 576         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
 577                 cpu_to_le32(ts.tv_nsec);
 578         fe->i_dtime = 0;
 579
 580         /*
 581          * If supported, directories start with inline data. If inline
 582          * isn't supported, but indexing is, we start them as indexed.
 583          */
 584         feat = le16_to_cpu(fe->i_dyn_features);
 585         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
 586                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
 587
 588                 fe->id2.i_data.id_count = cpu_to_le16(
 589                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
 590         } else {
 591                 fel = &fe->id2.i_list;
 592                 fel->l_tree_depth = 0;
 593                 fel->l_next_free_rec = 0;
 594                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
 595         }
 596
 597         ocfs2_journal_dirty(handle, *new_fe_bh);
 598
 599         ocfs2_populate_inode(inode, fe, 1);
 600         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
 601         if (!ocfs2_mount_local(osb)) {
 602                 status = ocfs2_create_new_inode_locks(inode);
 603                 if (status < 0)
 604                         mlog_errno(status);
 605         }
 606
 607         oi->i_sync_tid = handle->h_transaction->t_tid;
 608         oi->i_datasync_tid = handle->h_transaction->t_tid;
 609
 610 leave:
 611         if (status < 0) {
 612                 if (*new_fe_bh) {
 613                         brelse(*new_fe_bh);
 614                         *new_fe_bh = NULL;
 615                 }
 616         }
 617
 618         if (status)
 619                 mlog_errno(status);
 620         return status;
 621 }
 622
 623 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 624                               struct inode *dir,
 625                               struct inode *inode,
 626                               dev_t dev,
 627                               struct buffer_head **new_fe_bh,
 628                               struct buffer_head *parent_fe_bh,
 629                               handle_t *handle,
 630                               struct ocfs2_alloc_context *inode_ac)
 631 {
 632         int status = 0;
 633         u64 suballoc_loc, fe_blkno = 0;
 634         u16 suballoc_bit;
 635
 636         *new_fe_bh = NULL;
 637
 638         status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
 639                                        inode_ac, &suballoc_loc,
 640                                        &suballoc_bit, &fe_blkno);
 641         if (status < 0) {
 642                 mlog_errno(status);
 643                 return status;
 644         }
 645
 646         return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
 647                                     parent_fe_bh, handle, inode_ac,
 648                                     fe_blkno, suballoc_loc, suballoc_bit);
 649 }
 650
 651 static int ocfs2_mkdir(struct inode *dir,
 652                        struct dentry *dentry,
 653                        umode_t mode)
 654 {
 655         int ret;
 656
 657         trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 658                           OCFS2_I(dir)->ip_blkno, mode);
 659         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
 660         if (ret)
 661                 mlog_errno(ret);
 662
 663         return ret;
 664 }
 665
 666 static int ocfs2_create(struct inode *dir,
 667                         struct dentry *dentry,
 668                         umode_t mode,
 669                         bool excl)
 670 {
 671         int ret;
 672
 673         trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 674                            (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
 675         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
 676         if (ret)
 677                 mlog_errno(ret);
 678
 679         return ret;
 680 }
 681
 682 static int ocfs2_link(struct dentry *old_dentry,
 683                       struct inode *dir,
 684                       struct dentry *dentry)
 685 {
 686         handle_t *handle;
 687         struct inode *inode = d_inode(old_dentry);
 688         struct inode *old_dir = d_inode(old_dentry->d_parent);
 689         int err;
 690         struct buffer_head *fe_bh = NULL;
 691         struct buffer_head *old_dir_bh = NULL;
 692         struct buffer_head *parent_fe_bh = NULL;
 693         struct ocfs2_dinode *fe = NULL;
 694         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 695         struct ocfs2_dir_lookup_result lookup = { NULL, };
 696         sigset_t oldset;
 697         u64 old_de_ino;
 698
 699         trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
 700                          old_dentry->d_name.len, old_dentry->d_name.name,
 701                          dentry->d_name.len, dentry->d_name.name);
 702
 703         if (S_ISDIR(inode->i_mode))
 704                 return -EPERM;
 705
 706         err = dquot_initialize(dir);
 707         if (err) {
 708                 mlog_errno(err);
 709                 return err;
 710         }
 711
 712         err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
 713                         &parent_fe_bh, dir, 0);
 714         if (err < 0) {
 715                 if (err != -ENOENT)
 716                         mlog_errno(err);
 717                 return err;
 718         }
 719
 720         /* make sure both dirs have bhs
 721          * get an extra ref on old_dir_bh if old==new */
 722         if (!parent_fe_bh) {
 723                 if (old_dir_bh) {
 724                         parent_fe_bh = old_dir_bh;
 725                         get_bh(parent_fe_bh);
 726                 } else {
 727                         mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
 728                         err = -EIO;
 729                         goto out;
 730                 }
 731         }
 732
 733         if (!dir->i_nlink) {
 734                 err = -ENOENT;
 735                 goto out;
 736         }
 737
 738         err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
 739                         old_dentry->d_name.len, &old_de_ino);
 740         if (err) {
 741                 err = -ENOENT;
 742                 goto out;
 743         }
 744
 745         /*
 746          * Check whether another node removed the source inode while we
 747          * were in the vfs.
 748          */
 749         if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
 750                 err = -ENOENT;
 751                 goto out;
 752         }
 753
 754         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 755                                         dentry->d_name.len);
 756         if (err)
 757                 goto out;
 758
 759         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 760                                            dentry->d_name.name,
 761                                            dentry->d_name.len, &lookup);
 762         if (err < 0) {
 763                 mlog_errno(err);
 764                 goto out;
 765         }
 766
 767         err = ocfs2_inode_lock(inode, &fe_bh, 1);
 768         if (err < 0) {
 769                 if (err != -ENOENT)
 770                         mlog_errno(err);
 771                 goto out;
 772         }
 773
 774         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 775         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
 776                 err = -EMLINK;
 777                 goto out_unlock_inode;
 778         }
 779
 780         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
 781         if (IS_ERR(handle)) {
 782                 err = PTR_ERR(handle);
 783                 handle = NULL;
 784                 mlog_errno(err);
 785                 goto out_unlock_inode;
 786         }
 787
 788         /* Starting to change things, restart is no longer possible. */
 789         ocfs2_block_signals(&oldset);
 790
 791         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 792                                       OCFS2_JOURNAL_ACCESS_WRITE);
 793         if (err < 0) {
 794                 mlog_errno(err);
 795                 goto out_commit;
 796         }
 797
 798         inc_nlink(inode);
 799         inode->i_ctime = current_time(inode);
 800         ocfs2_set_links_count(fe, inode->i_nlink);
 801         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 802         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 803         ocfs2_journal_dirty(handle, fe_bh);
 804
 805         err = ocfs2_add_entry(handle, dentry, inode,
 806                               OCFS2_I(inode)->ip_blkno,
 807                               parent_fe_bh, &lookup);
 808         if (err) {
 809                 ocfs2_add_links_count(fe, -1);
 810                 drop_nlink(inode);
 811                 mlog_errno(err);
 812                 goto out_commit;
 813         }
 814
 815         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
 816         if (err) {
 817                 mlog_errno(err);
 818                 goto out_commit;
 819         }
 820
 821         ihold(inode);
 822         d_instantiate(dentry, inode);
 823
 824 out_commit:
 825         ocfs2_commit_trans(osb, handle);
 826         ocfs2_unblock_signals(&oldset);
 827 out_unlock_inode:
 828         ocfs2_inode_unlock(inode, 1);
 829
 830 out:
 831         ocfs2_double_unlock(old_dir, dir);
 832
 833         brelse(fe_bh);
 834         brelse(parent_fe_bh);
 835         brelse(old_dir_bh);
 836
 837         ocfs2_free_dir_lookup_result(&lookup);
 838
 839         if (err)
 840                 mlog_errno(err);
 841
 842         return err;
 843 }
 844
 845 /*
 846  * Takes and drops an exclusive lock on the given dentry. This will
 847  * force other nodes to drop it.
 848  */
 849 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 850 {
 851         int ret;
 852
 853         ret = ocfs2_dentry_lock(dentry, 1);
 854         if (ret)
 855                 mlog_errno(ret);
 856         else
 857                 ocfs2_dentry_unlock(dentry, 1);
 858
 859         return ret;
 860 }
 861
 862 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
 863 {
 864         if (S_ISDIR(inode->i_mode)) {
 865                 if (inode->i_nlink == 2)
 866                         return 1;
 867                 return 0;
 868         }
 869
 870         if (inode->i_nlink == 1)
 871                 return 1;
 872         return 0;
 873 }
 874
 875 static int ocfs2_unlink(struct inode *dir,
 876                         struct dentry *dentry)
 877 {
 878         int status;
 879         int child_locked = 0;
 880         bool is_unlinkable = false;
 881         struct inode *inode = d_inode(dentry);
 882         struct inode *orphan_dir = NULL;
 883         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 884         u64 blkno;
 885         struct ocfs2_dinode *fe = NULL;
 886         struct buffer_head *fe_bh = NULL;
 887         struct buffer_head *parent_node_bh = NULL;
 888         handle_t *handle = NULL;
 889         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 890         struct ocfs2_dir_lookup_result lookup = { NULL, };
 891         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
 892
 893         trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
 894                            dentry->d_name.name,
 895                            (unsigned long long)OCFS2_I(dir)->ip_blkno,
 896                            (unsigned long long)OCFS2_I(inode)->ip_blkno);
 897
 898         status = dquot_initialize(dir);
 899         if (status) {
 900                 mlog_errno(status);
 901                 return status;
 902         }
 903
 904         BUG_ON(d_inode(dentry->d_parent) != dir);
 905
 906         if (inode == osb->root_inode)
 907                 return -EPERM;
 908
 909         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
 910                                          OI_LS_PARENT);
 911         if (status < 0) {
 912                 if (status != -ENOENT)
 913                         mlog_errno(status);
 914                 return status;
 915         }
 916
 917         status = ocfs2_find_files_on_disk(dentry->d_name.name,
 918                                           dentry->d_name.len, &blkno, dir,
 919                                           &lookup);
 920         if (status < 0) {
 921                 if (status != -ENOENT)
 922                         mlog_errno(status);
 923                 goto leave;
 924         }
 925
 926         if (OCFS2_I(inode)->ip_blkno != blkno) {
 927                 status = -ENOENT;
 928
 929                 trace_ocfs2_unlink_noent(
 930                                 (unsigned long long)OCFS2_I(inode)->ip_blkno,
 931                                 (unsigned long long)blkno,
 932                                 OCFS2_I(inode)->ip_flags);
 933                 goto leave;
 934         }
 935
 936         status = ocfs2_inode_lock(inode, &fe_bh, 1);
 937         if (status < 0) {
 938                 if (status != -ENOENT)
 939                         mlog_errno(status);
 940                 goto leave;
 941         }
 942         child_locked = 1;
 943
 944         if (S_ISDIR(inode->i_mode)) {
 945                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
 946                         status = -ENOTEMPTY;
 947                         goto leave;
 948                 }
 949         }
 950
 951         status = ocfs2_remote_dentry_delete(dentry);
 952         if (status < 0) {
 953                 /* This remote delete should succeed under all normal
 954                  * circumstances. */
 955                 mlog_errno(status);
 956                 goto leave;
 957         }
 958
 959         if (ocfs2_inode_is_unlinkable(inode)) {
 960                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
 961                                                   OCFS2_I(inode)->ip_blkno,
 962                                                   orphan_name, &orphan_insert,
 963                                                   false);
 964                 if (status < 0) {
 965                         mlog_errno(status);
 966                         goto leave;
 967                 }
 968                 is_unlinkable = true;
 969         }
 970
 971         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
 972         if (IS_ERR(handle)) {
 973                 status = PTR_ERR(handle);
 974                 handle = NULL;
 975                 mlog_errno(status);
 976                 goto leave;
 977         }
 978
 979         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 980                                          OCFS2_JOURNAL_ACCESS_WRITE);
 981         if (status < 0) {
 982                 mlog_errno(status);
 983                 goto leave;
 984         }
 985
 986         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 987
 988         /* delete the name from the parent dir */
 989         status = ocfs2_delete_entry(handle, dir, &lookup);
 990         if (status < 0) {
 991                 mlog_errno(status);
 992                 goto leave;
 993         }
 994
 995         if (S_ISDIR(inode->i_mode))
 996                 drop_nlink(inode);
 997         drop_nlink(inode);
 998         ocfs2_set_links_count(fe, inode->i_nlink);
 999         ocfs2_journal_dirty(handle, fe_bh);
1000
1001         dir->i_ctime = dir->i_mtime = current_time(dir);
1002         if (S_ISDIR(inode->i_mode))
1003                 drop_nlink(dir);
1004
1005         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1006         if (status < 0) {
1007                 mlog_errno(status);
1008                 if (S_ISDIR(inode->i_mode))
1009                         inc_nlink(dir);
1010                 goto leave;
1011         }
1012
1013         if (is_unlinkable) {
1014                 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1015                                 orphan_name, &orphan_insert, orphan_dir, false);
1016                 if (status < 0)
1017                         mlog_errno(status);
1018         }
1019
1020 leave:
1021         if (handle)
1022                 ocfs2_commit_trans(osb, handle);
1023
1024         if (orphan_dir) {
1025                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1026                 ocfs2_inode_unlock(orphan_dir, 1);
1027                 inode_unlock(orphan_dir);
1028                 iput(orphan_dir);
1029         }
1030
1031         if (child_locked)
1032                 ocfs2_inode_unlock(inode, 1);
1033
1034         ocfs2_inode_unlock(dir, 1);
1035
1036         brelse(fe_bh);
1037         brelse(parent_node_bh);
1038
1039         ocfs2_free_dir_lookup_result(&orphan_insert);
1040         ocfs2_free_dir_lookup_result(&lookup);
1041
1042         if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1043                 mlog_errno(status);
1044
1045         return status;
1046 }
1047
1048 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1049                 u64 src_inode_no, u64 dest_inode_no)
1050 {
1051         int ret = 0, i = 0;
1052         u64 parent_inode_no = 0;
1053         u64 child_inode_no = src_inode_no;
1054         struct inode *child_inode;
1055
1056 #define MAX_LOOKUP_TIMES 32
1057         while (1) {
1058                 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1059                 if (IS_ERR(child_inode)) {
1060                         ret = PTR_ERR(child_inode);
1061                         break;
1062                 }
1063
1064                 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1065                 if (ret < 0) {
1066                         iput(child_inode);
1067                         if (ret != -ENOENT)
1068                                 mlog_errno(ret);
1069                         break;
1070                 }
1071
1072                 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1073                                 &parent_inode_no);
1074                 ocfs2_inode_unlock(child_inode, 0);
1075                 iput(child_inode);
1076                 if (ret < 0) {
1077                         ret = -ENOENT;
1078                         break;
1079                 }
1080
1081                 if (parent_inode_no == dest_inode_no) {
1082                         ret = 1;
1083                         break;
1084                 }
1085
1086                 if (parent_inode_no == osb->root_inode->i_ino) {
1087                         ret = 0;
1088                         break;
1089                 }
1090
1091                 child_inode_no = parent_inode_no;
1092
1093                 if (++i >= MAX_LOOKUP_TIMES) {
1094                         mlog(ML_NOTICE, "max lookup times reached, filesystem "
1095                                         "may have nested directories, "
1096                                         "src inode: %llu, dest inode: %llu.\n",
1097                                         (unsigned long long)src_inode_no,
1098                                         (unsigned long long)dest_inode_no);
1099                         ret = 0;
1100                         break;
1101                 }
1102         }
1103
1104         return ret;
1105 }
1106
1107 /*
1108  * The only place this should be used is rename and link!
1109  * if they have the same id, then the 1st one is the only one locked.
1110  */
1111 static int ocfs2_double_lock(struct ocfs2_super *osb,
1112                              struct buffer_head **bh1,
1113                              struct inode *inode1,
1114                              struct buffer_head **bh2,
1115                              struct inode *inode2,
1116                              int rename)
1117 {
1118         int status;
1119         int inode1_is_ancestor, inode2_is_ancestor;
1120         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1121         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1122
1123         trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1124                                 (unsigned long long)oi2->ip_blkno);
1125
1126         if (*bh1)
1127                 *bh1 = NULL;
1128         if (*bh2)
1129                 *bh2 = NULL;
1130
1131         /* we always want to lock the one with the lower lockid first.
1132          * and if they are nested, we lock ancestor first */
1133         if (oi1->ip_blkno != oi2->ip_blkno) {
1134                 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1135                                 oi1->ip_blkno);
1136                 if (inode1_is_ancestor < 0) {
1137                         status = inode1_is_ancestor;
1138                         goto bail;
1139                 }
1140
1141                 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1142                                 oi2->ip_blkno);
1143                 if (inode2_is_ancestor < 0) {
1144                         status = inode2_is_ancestor;
1145                         goto bail;
1146                 }
1147
1148                 if ((inode1_is_ancestor == 1) ||
1149                                 (oi1->ip_blkno < oi2->ip_blkno &&
1150                                 inode2_is_ancestor == 0)) {
1151                         /* switch id1 and id2 around */
1152                         swap(bh2, bh1);
1153                         swap(inode2, inode1);
1154                 }
1155                 /* lock id2 */
1156                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1157                                 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1158                 if (status < 0) {
1159                         if (status != -ENOENT)
1160                                 mlog_errno(status);
1161                         goto bail;
1162                 }
1163         }
1164
1165         /* lock id1 */
1166         status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1167                         rename == 1 ?  OI_LS_RENAME2 : OI_LS_PARENT);
1168         if (status < 0) {
1169                 /*
1170                  * An error return must mean that no cluster locks
1171                  * were held on function exit.
1172                  */
1173                 if (oi1->ip_blkno != oi2->ip_blkno) {
1174                         ocfs2_inode_unlock(inode2, 1);
1175                         brelse(*bh2);
1176                         *bh2 = NULL;
1177                 }
1178
1179                 if (status != -ENOENT)
1180                         mlog_errno(status);
1181         }
1182
1183         trace_ocfs2_double_lock_end(
1184                         (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1185                         (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1186
1187 bail:
1188         if (status)
1189                 mlog_errno(status);
1190         return status;
1191 }
1192
1193 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1194 {
1195         ocfs2_inode_unlock(inode1, 1);
1196
1197         if (inode1 != inode2)
1198                 ocfs2_inode_unlock(inode2, 1);
1199 }
1200
1201 static int ocfs2_rename(struct inode *old_dir,
1202                         struct dentry *old_dentry,
1203                         struct inode *new_dir,
1204                         struct dentry *new_dentry,
1205                         unsigned int flags)
1206 {
1207         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1208         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1209         struct inode *old_inode = d_inode(old_dentry);
1210         struct inode *new_inode = d_inode(new_dentry);
1211         struct inode *orphan_dir = NULL;
1212         struct ocfs2_dinode *newfe = NULL;
1213         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1214         struct buffer_head *newfe_bh = NULL;
1215         struct buffer_head *old_inode_bh = NULL;
1216         struct ocfs2_super *osb = NULL;
1217         u64 newfe_blkno, old_de_ino;
1218         handle_t *handle = NULL;
1219         struct buffer_head *old_dir_bh = NULL;
1220         struct buffer_head *new_dir_bh = NULL;
1221         u32 old_dir_nlink = old_dir->i_nlink;
1222         struct ocfs2_dinode *old_di;
1223         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1224         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1225         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1226         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1227         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1228         bool should_add_orphan = false;
1229
1230         if (flags)
1231                 return -EINVAL;
1232
1233         /* At some point it might be nice to break this function up a
1234          * bit. */
1235
1236         trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1237                            old_dentry->d_name.len, old_dentry->d_name.name,
1238                            new_dentry->d_name.len, new_dentry->d_name.name);
1239
1240         status = dquot_initialize(old_dir);
1241         if (status) {
1242                 mlog_errno(status);
1243                 goto bail;
1244         }
1245         status = dquot_initialize(new_dir);
1246         if (status) {
1247                 mlog_errno(status);
1248                 goto bail;
1249         }
1250
1251         osb = OCFS2_SB(old_dir->i_sb);
1252
1253         if (new_inode) {
1254                 if (!igrab(new_inode))
1255                         BUG();
1256         }
1257
1258         /* Assume a directory hierarchy thusly:
1259          * a/b/c
1260          * a/d
1261          * a,b,c, and d are all directories.
1262          *
1263          * from cwd of 'a' on both nodes:
1264          * node1: mv b/c d
1265          * node2: mv d   b/c
1266          *
1267          * And that's why, just like the VFS, we need a file system
1268          * rename lock. */
1269         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1270                 status = ocfs2_rename_lock(osb);
1271                 if (status < 0) {
1272                         mlog_errno(status);
1273                         goto bail;
1274                 }
1275                 rename_lock = 1;
1276
1277                 /* here we cannot guarantee the inodes haven't just been
1278                  * changed, so check if they are nested again */
1279                 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1280                                 old_inode->i_ino);
1281                 if (status < 0) {
1282                         mlog_errno(status);
1283                         goto bail;
1284                 } else if (status == 1) {
1285                         status = -EPERM;
1286                         trace_ocfs2_rename_not_permitted(
1287                                         (unsigned long long)old_inode->i_ino,
1288                                         (unsigned long long)new_dir->i_ino);
1289                         goto bail;
1290                 }
1291         }
1292
1293         /* if old and new are the same, this'll just do one lock. */
1294         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1295                                    &new_dir_bh, new_dir, 1);
1296         if (status < 0) {
1297                 mlog_errno(status);
1298                 goto bail;
1299         }
1300         parents_locked = 1;
1301
1302         if (!new_dir->i_nlink) {
1303                 status = -EACCES;
1304                 goto bail;
1305         }
1306
1307         /* make sure both dirs have bhs
1308          * get an extra ref on old_dir_bh if old==new */
1309         if (!new_dir_bh) {
1310                 if (old_dir_bh) {
1311                         new_dir_bh = old_dir_bh;
1312                         get_bh(new_dir_bh);
1313                 } else {
1314                         mlog(ML_ERROR, "no old_dir_bh!\n");
1315                         status = -EIO;
1316                         goto bail;
1317                 }
1318         }
1319
1320         /*
1321          * Aside from allowing a meta data update, the locking here
1322          * also ensures that the downconvert thread on other nodes
1323          * won't have to concurrently downconvert the inode and the
1324          * dentry locks.
1325          */
1326         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1327                                          OI_LS_PARENT);
1328         if (status < 0) {
1329                 if (status != -ENOENT)
1330                         mlog_errno(status);
1331                 goto bail;
1332         }
1333         old_child_locked = 1;
1334
1335         status = ocfs2_remote_dentry_delete(old_dentry);
1336         if (status < 0) {
1337                 mlog_errno(status);
1338                 goto bail;
1339         }
1340
1341         if (S_ISDIR(old_inode->i_mode)) {
1342                 u64 old_inode_parent;
1343
1344                 update_dot_dot = 1;
1345                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1346                                                   old_inode,
1347                                                   &old_inode_dot_dot_res);
1348                 if (status) {
1349                         status = -EIO;
1350                         goto bail;
1351                 }
1352
1353                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1354                         status = -EIO;
1355                         goto bail;
1356                 }
1357
1358                 if (!new_inode && new_dir != old_dir &&
1359                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1360                         status = -EMLINK;
1361                         goto bail;
1362                 }
1363         }
1364
1365         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1366                                             old_dentry->d_name.len,
1367                                             &old_de_ino);
1368         if (status) {
1369                 status = -ENOENT;
1370                 goto bail;
1371         }
1372
1373         /*
1374          *  Check for inode number is _not_ due to possible IO errors.
1375          *  We might rmdir the source, keep it as pwd of some process
1376          *  and merrily kill the link to whatever was created under the
1377          *  same name. Goodbye sticky bit ;-<
1378          */
1379         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1380                 status = -ENOENT;
1381                 goto bail;
1382         }
1383
1384         /* check if the target already exists (in which case we need
1385          * to delete it */
1386         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1387                                           new_dentry->d_name.len,
1388                                           &newfe_blkno, new_dir,
1389                                           &target_lookup_res);
1390         /* The only error we allow here is -ENOENT because the new
1391          * file not existing is perfectly valid. */
1392         if ((status < 0) && (status != -ENOENT)) {
1393                 /* If we cannot find the file specified we should just */
1394                 /* return the error... */
1395                 mlog_errno(status);
1396                 goto bail;
1397         }
1398         if (status == 0)
1399                 target_exists = 1;
1400
1401         if (!target_exists && new_inode) {
1402                 /*
1403                  * Target was unlinked by another node while we were
1404                  * waiting to get to ocfs2_rename(). There isn't
1405                  * anything we can do here to help the situation, so
1406                  * bubble up the appropriate error.
1407                  */
1408                 status = -ENOENT;
1409                 goto bail;
1410         }
1411
1412         /* In case we need to overwrite an existing file, we blow it
1413          * away first */
1414         if (target_exists) {
1415                 /* VFS didn't think there existed an inode here, but
1416                  * someone else in the cluster must have raced our
1417                  * rename to create one. Today we error cleanly, in
1418                  * the future we should consider calling iget to build
1419                  * a new struct inode for this entry. */
1420                 if (!new_inode) {
1421                         status = -EACCES;
1422
1423                         trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1424                                                 new_dentry->d_name.name);
1425                         goto bail;
1426                 }
1427
1428                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1429                         status = -EACCES;
1430
1431                         trace_ocfs2_rename_disagree(
1432                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1433                              (unsigned long long)newfe_blkno,
1434                              OCFS2_I(new_inode)->ip_flags);
1435                         goto bail;
1436                 }
1437
1438                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1439                 if (status < 0) {
1440                         if (status != -ENOENT)
1441                                 mlog_errno(status);
1442                         goto bail;
1443                 }
1444                 new_child_locked = 1;
1445
1446                 status = ocfs2_remote_dentry_delete(new_dentry);
1447                 if (status < 0) {
1448                         mlog_errno(status);
1449                         goto bail;
1450                 }
1451
1452                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1453
1454                 trace_ocfs2_rename_over_existing(
1455                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1456                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1457
1458                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1459                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1460                                                 OCFS2_I(new_inode)->ip_blkno,
1461                                                 orphan_name, &orphan_insert,
1462                                                 false);
1463                         if (status < 0) {
1464                                 mlog_errno(status);
1465                                 goto bail;
1466                         }
1467                         should_add_orphan = true;
1468                 }
1469         } else {
1470                 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1471
1472                 status = ocfs2_check_dir_for_entry(new_dir,
1473                                                    new_dentry->d_name.name,
1474                                                    new_dentry->d_name.len);
1475                 if (status)
1476                         goto bail;
1477
1478                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1479                                                       new_dentry->d_name.name,
1480                                                       new_dentry->d_name.len,
1481                                                       &target_insert);
1482                 if (status < 0) {
1483                         mlog_errno(status);
1484                         goto bail;
1485                 }
1486         }
1487
1488         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1489         if (IS_ERR(handle)) {
1490                 status = PTR_ERR(handle);
1491                 handle = NULL;
1492                 mlog_errno(status);
1493                 goto bail;
1494         }
1495
1496         if (target_exists) {
1497                 if (S_ISDIR(new_inode->i_mode)) {
1498                         if (new_inode->i_nlink != 2 ||
1499                             !ocfs2_empty_dir(new_inode)) {
1500                                 status = -ENOTEMPTY;
1501                                 goto bail;
1502                         }
1503                 }
1504                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1505                                                  newfe_bh,
1506                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1507                 if (status < 0) {
1508                         mlog_errno(status);
1509                         goto bail;
1510                 }
1511
1512                 /* change the dirent to point to the correct inode */
1513                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1514                                             old_inode);
1515                 if (status < 0) {
1516                         mlog_errno(status);
1517                         goto bail;
1518                 }
1519                 new_dir->i_version++;
1520
1521                 if (S_ISDIR(new_inode->i_mode))
1522                         ocfs2_set_links_count(newfe, 0);
1523                 else
1524                         ocfs2_add_links_count(newfe, -1);
1525                 ocfs2_journal_dirty(handle, newfe_bh);
1526                 if (should_add_orphan) {
1527                         status = ocfs2_orphan_add(osb, handle, new_inode,
1528                                         newfe_bh, orphan_name,
1529                                         &orphan_insert, orphan_dir, false);
1530                         if (status < 0) {
1531                                 mlog_errno(status);
1532                                 goto bail;
1533                         }
1534                 }
1535         } else {
1536                 /* if the name was not found in new_dir, add it now */
1537                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1538                                          OCFS2_I(old_inode)->ip_blkno,
1539                                          new_dir_bh, &target_insert);
1540                 if (status < 0) {
1541                         mlog_errno(status);
1542                         goto bail;
1543                 }
1544         }
1545
1546         old_inode->i_ctime = current_time(old_inode);
1547         mark_inode_dirty(old_inode);
1548
1549         status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1550                                          old_inode_bh,
1551                                          OCFS2_JOURNAL_ACCESS_WRITE);
1552         if (status >= 0) {
1553                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1554
1555                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1556                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1557                 ocfs2_journal_dirty(handle, old_inode_bh);
1558         } else
1559                 mlog_errno(status);
1560
1561         /*
1562          * Now that the name has been added to new_dir, remove the old name.
1563          *
1564          * We don't keep any directory entry context around until now
1565          * because the insert might have changed the type of directory
1566          * we're dealing with.
1567          */
1568         status = ocfs2_find_entry(old_dentry->d_name.name,
1569                                   old_dentry->d_name.len, old_dir,
1570                                   &old_entry_lookup);
1571         if (status) {
1572                 if (!is_journal_aborted(osb->journal->j_journal)) {
1573                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1574                                         "is not deleted.",
1575                                         new_dentry->d_name.len, new_dentry->d_name.name,
1576                                         old_dentry->d_name.len, old_dentry->d_name.name);
1577                 }
1578                 goto bail;
1579         }
1580
1581         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1582         if (status < 0) {
1583                 mlog_errno(status);
1584                 if (!is_journal_aborted(osb->journal->j_journal)) {
1585                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1586                                         "is not deleted.",
1587                                         new_dentry->d_name.len, new_dentry->d_name.name,
1588                                         old_dentry->d_name.len, old_dentry->d_name.name);
1589                 }
1590                 goto bail;
1591         }
1592
1593         if (new_inode) {
1594                 drop_nlink(new_inode);
1595                 new_inode->i_ctime = current_time(new_inode);
1596         }
1597         old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
1598
1599         if (update_dot_dot) {
1600                 status = ocfs2_update_entry(old_inode, handle,
1601                                             &old_inode_dot_dot_res, new_dir);
1602                 drop_nlink(old_dir);
1603                 if (new_inode) {
1604                         drop_nlink(new_inode);
1605                 } else {
1606                         inc_nlink(new_dir);
1607                         mark_inode_dirty(new_dir);
1608                 }
1609         }
1610         mark_inode_dirty(old_dir);
1611         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1612         if (new_inode) {
1613                 mark_inode_dirty(new_inode);
1614                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1615         }
1616
1617         if (old_dir != new_dir) {
1618                 /* Keep the same times on both directories.*/
1619                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1620
1621                 /*
1622                  * This will also pick up the i_nlink change from the
1623                  * block above.
1624                  */
1625                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1626         }
1627
1628         if (old_dir_nlink != old_dir->i_nlink) {
1629                 if (!old_dir_bh) {
1630                         mlog(ML_ERROR, "need to change nlink for old dir "
1631                              "%llu from %d to %d but bh is NULL!\n",
1632                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1633                              (int)old_dir_nlink, old_dir->i_nlink);
1634                 } else {
1635                         struct ocfs2_dinode *fe;
1636                         status = ocfs2_journal_access_di(handle,
1637                                                          INODE_CACHE(old_dir),
1638                                                          old_dir_bh,
1639                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1640                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1641                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1642                         ocfs2_journal_dirty(handle, old_dir_bh);
1643                 }
1644         }
1645         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1646         status = 0;
1647 bail:
1648         if (handle)
1649                 ocfs2_commit_trans(osb, handle);
1650
1651         if (orphan_dir) {
1652                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1653                 ocfs2_inode_unlock(orphan_dir, 1);
1654                 inode_unlock(orphan_dir);
1655                 iput(orphan_dir);
1656         }
1657
1658         if (new_child_locked)
1659                 ocfs2_inode_unlock(new_inode, 1);
1660
1661         if (old_child_locked)
1662                 ocfs2_inode_unlock(old_inode, 1);
1663
1664         if (parents_locked)
1665                 ocfs2_double_unlock(old_dir, new_dir);
1666
1667         if (rename_lock)
1668                 ocfs2_rename_unlock(osb);
1669
1670         if (new_inode)
1671                 sync_mapping_buffers(old_inode->i_mapping);
1672
1673         iput(new_inode);
1674
1675         ocfs2_free_dir_lookup_result(&target_lookup_res);
1676         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1677         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1678         ocfs2_free_dir_lookup_result(&orphan_insert);
1679         ocfs2_free_dir_lookup_result(&target_insert);
1680
1681         brelse(newfe_bh);
1682         brelse(old_inode_bh);
1683         brelse(old_dir_bh);
1684         brelse(new_dir_bh);
1685
1686         if (status)
1687                 mlog_errno(status);
1688
1689         return status;
1690 }
1691
1692 /*
1693  * we expect i_size = strlen(symname). Copy symname into the file
1694  * data, including the null terminator.
1695  */
1696 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1697                                      handle_t *handle,
1698                                      struct inode *inode,
1699                                      const char *symname)
1700 {
1701         struct buffer_head **bhs = NULL;
1702         const char *c;
1703         struct super_block *sb = osb->sb;
1704         u64 p_blkno, p_blocks;
1705         int virtual, blocks, status, i, bytes_left;
1706
1707         bytes_left = i_size_read(inode) + 1;
1708         /* we can't trust i_blocks because we're actually going to
1709          * write i_size + 1 bytes. */
1710         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1711
1712         trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1713                                         i_size_read(inode), blocks);
1714
1715         /* Sanity check -- make sure we're going to fit. */
1716         if (bytes_left >
1717             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1718                 status = -EIO;
1719                 mlog_errno(status);
1720                 goto bail;
1721         }
1722
1723         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1724         if (!bhs) {
1725                 status = -ENOMEM;
1726                 mlog_errno(status);
1727                 goto bail;
1728         }
1729
1730         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1731                                              NULL);
1732         if (status < 0) {
1733                 mlog_errno(status);
1734                 goto bail;
1735         }
1736
1737         /* links can never be larger than one cluster so we know this
1738          * is all going to be contiguous, but do a sanity check
1739          * anyway. */
1740         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1741                 status = -EIO;
1742                 mlog_errno(status);
1743                 goto bail;
1744         }
1745
1746         virtual = 0;
1747         while(bytes_left > 0) {
1748                 c = &symname[virtual * sb->s_blocksize];
1749
1750                 bhs[virtual] = sb_getblk(sb, p_blkno);
1751                 if (!bhs[virtual]) {
1752                         status = -ENOMEM;
1753                         mlog_errno(status);
1754                         goto bail;
1755                 }
1756                 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1757                                               bhs[virtual]);
1758
1759                 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1760                                               bhs[virtual],
1761                                               OCFS2_JOURNAL_ACCESS_CREATE);
1762                 if (status < 0) {
1763                         mlog_errno(status);
1764                         goto bail;
1765                 }
1766
1767                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1768
1769                 memcpy(bhs[virtual]->b_data, c,
1770                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1771                        bytes_left);
1772
1773                 ocfs2_journal_dirty(handle, bhs[virtual]);
1774
1775                 virtual++;
1776                 p_blkno++;
1777                 bytes_left -= sb->s_blocksize;
1778         }
1779
1780         status = 0;
1781 bail:
1782
1783         if (bhs) {
1784                 for(i = 0; i < blocks; i++)
1785                         brelse(bhs[i]);
1786                 kfree(bhs);
1787         }
1788
1789         if (status)
1790                 mlog_errno(status);
1791         return status;
1792 }
1793
1794 static int ocfs2_symlink(struct inode *dir,
1795                          struct dentry *dentry,
1796                          const char *symname)
1797 {
1798         int status, l, credits;
1799         u64 newsize;
1800         struct ocfs2_super *osb = NULL;
1801         struct inode *inode = NULL;
1802         struct super_block *sb;
1803         struct buffer_head *new_fe_bh = NULL;
1804         struct buffer_head *parent_fe_bh = NULL;
1805         struct ocfs2_dinode *fe = NULL;
1806         struct ocfs2_dinode *dirfe;
1807         handle_t *handle = NULL;
1808         struct ocfs2_alloc_context *inode_ac = NULL;
1809         struct ocfs2_alloc_context *data_ac = NULL;
1810         struct ocfs2_alloc_context *xattr_ac = NULL;
1811         int want_clusters = 0;
1812         int xattr_credits = 0;
1813         struct ocfs2_security_xattr_info si = {
1814                 .enable = 1,
1815         };
1816         int did_quota = 0, did_quota_inode = 0;
1817         struct ocfs2_dir_lookup_result lookup = { NULL, };
1818         sigset_t oldset;
1819         int did_block_signals = 0;
1820         struct ocfs2_dentry_lock *dl = NULL;
1821
1822         trace_ocfs2_symlink_begin(dir, dentry, symname,
1823                                   dentry->d_name.len, dentry->d_name.name);
1824
1825         status = dquot_initialize(dir);
1826         if (status) {
1827                 mlog_errno(status);
1828                 goto bail;
1829         }
1830
1831         sb = dir->i_sb;
1832         osb = OCFS2_SB(sb);
1833
1834         l = strlen(symname) + 1;
1835
1836         credits = ocfs2_calc_symlink_credits(sb);
1837
1838         /* lock the parent directory */
1839         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1840         if (status < 0) {
1841                 if (status != -ENOENT)
1842                         mlog_errno(status);
1843                 return status;
1844         }
1845
1846         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1847         if (!ocfs2_read_links_count(dirfe)) {
1848                 /* can't make a file in a deleted directory. */
1849                 status = -ENOENT;
1850                 goto bail;
1851         }
1852
1853         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1854                                            dentry->d_name.len);
1855         if (status)
1856                 goto bail;
1857
1858         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1859                                               dentry->d_name.name,
1860                                               dentry->d_name.len, &lookup);
1861         if (status < 0) {
1862                 mlog_errno(status);
1863                 goto bail;
1864         }
1865
1866         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1867         if (status < 0) {
1868                 if (status != -ENOSPC)
1869                         mlog_errno(status);
1870                 goto bail;
1871         }
1872
1873         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1874         if (IS_ERR(inode)) {
1875                 status = PTR_ERR(inode);
1876                 inode = NULL;
1877                 mlog_errno(status);
1878                 goto bail;
1879         }
1880
1881         /* get security xattr */
1882         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1883         if (status) {
1884                 if (status == -EOPNOTSUPP)
1885                         si.enable = 0;
1886                 else {
1887                         mlog_errno(status);
1888                         goto bail;
1889                 }
1890         }
1891
1892         /* calculate meta data/clusters for setting security xattr */
1893         if (si.enable) {
1894                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1895                                                   &xattr_credits, &xattr_ac);
1896                 if (status < 0) {
1897                         mlog_errno(status);
1898                         goto bail;
1899                 }
1900         }
1901
1902         /* don't reserve bitmap space for fast symlinks. */
1903         if (l > ocfs2_fast_symlink_chars(sb))
1904                 want_clusters += 1;
1905
1906         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1907         if (status < 0) {
1908                 if (status != -ENOSPC)
1909                         mlog_errno(status);
1910                 goto bail;
1911         }
1912
1913         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1914         if (IS_ERR(handle)) {
1915                 status = PTR_ERR(handle);
1916                 handle = NULL;
1917                 mlog_errno(status);
1918                 goto bail;
1919         }
1920
1921         /* Starting to change things, restart is no longer possible. */
1922         ocfs2_block_signals(&oldset);
1923         did_block_signals = 1;
1924
1925         status = dquot_alloc_inode(inode);
1926         if (status)
1927                 goto bail;
1928         did_quota_inode = 1;
1929
1930         trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1931                                    dentry->d_name.name,
1932                                    (unsigned long long)OCFS2_I(dir)->ip_blkno,
1933                                    inode->i_mode);
1934
1935         status = ocfs2_mknod_locked(osb, dir, inode,
1936                                     0, &new_fe_bh, parent_fe_bh, handle,
1937                                     inode_ac);
1938         if (status < 0) {
1939                 mlog_errno(status);
1940                 goto bail;
1941         }
1942
1943         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1944         inode->i_rdev = 0;
1945         newsize = l - 1;
1946         inode->i_op = &ocfs2_symlink_inode_operations;
1947         inode_nohighmem(inode);
1948         if (l > ocfs2_fast_symlink_chars(sb)) {
1949                 u32 offset = 0;
1950
1951                 status = dquot_alloc_space_nodirty(inode,
1952                     ocfs2_clusters_to_bytes(osb->sb, 1));
1953                 if (status)
1954                         goto bail;
1955                 did_quota = 1;
1956                 inode->i_mapping->a_ops = &ocfs2_aops;
1957                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1958                                               new_fe_bh,
1959                                               handle, data_ac, NULL,
1960                                               NULL);
1961                 if (status < 0) {
1962                         if (status != -ENOSPC && status != -EINTR) {
1963                                 mlog(ML_ERROR,
1964                                      "Failed to extend file to %llu\n",
1965                                      (unsigned long long)newsize);
1966                                 mlog_errno(status);
1967                                 status = -ENOSPC;
1968                         }
1969                         goto bail;
1970                 }
1971                 i_size_write(inode, newsize);
1972                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1973         } else {
1974                 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1975                 memcpy((char *) fe->id2.i_symlink, symname, l);
1976                 i_size_write(inode, newsize);
1977                 inode->i_blocks = 0;
1978         }
1979
1980         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1981         if (status < 0) {
1982                 mlog_errno(status);
1983                 goto bail;
1984         }
1985
1986         if (!ocfs2_inode_is_fast_symlink(inode)) {
1987                 status = ocfs2_create_symlink_data(osb, handle, inode,
1988                                                    symname);
1989                 if (status < 0) {
1990                         mlog_errno(status);
1991                         goto bail;
1992                 }
1993         }
1994
1995         if (si.enable) {
1996                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1997                                                  xattr_ac, data_ac);
1998                 if (status < 0) {
1999                         mlog_errno(status);
2000                         goto bail;
2001                 }
2002         }
2003
2004         /*
2005          * Do this before adding the entry to the directory. We add
2006          * also set d_op after success so that ->d_iput() will cleanup
2007          * the dentry lock even if ocfs2_add_entry() fails below.
2008          */
2009         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2010         if (status) {
2011                 mlog_errno(status);
2012                 goto bail;
2013         }
2014
2015         dl = dentry->d_fsdata;
2016
2017         status = ocfs2_add_entry(handle, dentry, inode,
2018                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
2019                                  &lookup);
2020         if (status < 0) {
2021                 mlog_errno(status);
2022                 goto bail;
2023         }
2024
2025         insert_inode_hash(inode);
2026         d_instantiate(dentry, inode);
2027 bail:
2028         if (status < 0 && did_quota)
2029                 dquot_free_space_nodirty(inode,
2030                                         ocfs2_clusters_to_bytes(osb->sb, 1));
2031         if (status < 0 && did_quota_inode)
2032                 dquot_free_inode(inode);
2033         if (handle) {
2034                 if (status < 0 && fe)
2035                         ocfs2_set_links_count(fe, 0);
2036                 ocfs2_commit_trans(osb, handle);
2037         }
2038
2039         ocfs2_inode_unlock(dir, 1);
2040         if (did_block_signals)
2041                 ocfs2_unblock_signals(&oldset);
2042
2043         brelse(new_fe_bh);
2044         brelse(parent_fe_bh);
2045         kfree(si.value);
2046         ocfs2_free_dir_lookup_result(&lookup);
2047         if (inode_ac)
2048                 ocfs2_free_alloc_context(inode_ac);
2049         if (data_ac)
2050                 ocfs2_free_alloc_context(data_ac);
2051         if (xattr_ac)
2052                 ocfs2_free_alloc_context(xattr_ac);
2053         if ((status < 0) && inode) {
2054                 if (dl)
2055                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2056
2057                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2058                 clear_nlink(inode);
2059                 iput(inode);
2060         }
2061
2062         if (status)
2063                 mlog_errno(status);
2064
2065         return status;
2066 }
2067
2068 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2069 {
2070         int status, namelen;
2071
2072         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2073                            (long long)blkno);
2074         if (namelen <= 0) {
2075                 if (namelen)
2076                         status = namelen;
2077                 else
2078                         status = -EINVAL;
2079                 mlog_errno(status);
2080                 goto bail;
2081         }
2082         if (namelen != OCFS2_ORPHAN_NAMELEN) {
2083                 status = -EINVAL;
2084                 mlog_errno(status);
2085                 goto bail;
2086         }
2087
2088         trace_ocfs2_blkno_stringify(blkno, name, namelen);
2089
2090         status = 0;
2091 bail:
2092         if (status < 0)
2093                 mlog_errno(status);
2094         return status;
2095 }
2096
2097 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2098                                         struct inode **ret_orphan_dir,
2099                                         struct buffer_head **ret_orphan_dir_bh)
2100 {
2101         struct inode *orphan_dir_inode;
2102         struct buffer_head *orphan_dir_bh = NULL;
2103         int ret = 0;
2104
2105         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2106                                                        ORPHAN_DIR_SYSTEM_INODE,
2107                                                        osb->slot_num);
2108         if (!orphan_dir_inode) {
2109                 ret = -ENOENT;
2110                 mlog_errno(ret);
2111                 return ret;
2112         }
2113
2114         inode_lock(orphan_dir_inode);
2115
2116         ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2117         if (ret < 0) {
2118                 inode_unlock(orphan_dir_inode);
2119                 iput(orphan_dir_inode);
2120
2121                 mlog_errno(ret);
2122                 return ret;
2123         }
2124
2125         *ret_orphan_dir = orphan_dir_inode;
2126         *ret_orphan_dir_bh = orphan_dir_bh;
2127
2128         return 0;
2129 }
2130
2131 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2132                                       struct buffer_head *orphan_dir_bh,
2133                                       u64 blkno,
2134                                       char *name,
2135                                       struct ocfs2_dir_lookup_result *lookup,
2136                                       bool dio)
2137 {
2138         int ret;
2139         struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2140         int namelen = dio ?
2141                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2142                         OCFS2_ORPHAN_NAMELEN;
2143
2144         if (dio) {
2145                 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2146                                 OCFS2_DIO_ORPHAN_PREFIX);
2147                 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2148                         ret = -EINVAL;
2149                         mlog_errno(ret);
2150                         return ret;
2151                 }
2152
2153                 ret = ocfs2_blkno_stringify(blkno,
2154                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2155         } else
2156                 ret = ocfs2_blkno_stringify(blkno, name);
2157         if (ret < 0) {
2158                 mlog_errno(ret);
2159                 return ret;
2160         }
2161
2162         ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2163                                            orphan_dir_bh, name,
2164                                            namelen, lookup);
2165         if (ret < 0) {
2166                 mlog_errno(ret);
2167                 return ret;
2168         }
2169
2170         return 0;
2171 }
2172
2173 /**
2174  * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2175  * insertion of an orphan.
2176  * @osb: ocfs2 file system
2177  * @ret_orphan_dir: Orphan dir inode - returned locked!
2178  * @blkno: Actual block number of the inode to be inserted into orphan dir.
2179  * @lookup: dir lookup result, to be passed back into functions like
2180  *          ocfs2_orphan_add
2181  *
2182  * Returns zero on success and the ret_orphan_dir, name and lookup
2183  * fields will be populated.
2184  *
2185  * Returns non-zero on failure.
2186  */
2187 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2188                                     struct inode **ret_orphan_dir,
2189                                     u64 blkno,
2190                                     char *name,
2191                                     struct ocfs2_dir_lookup_result *lookup,
2192                                     bool dio)
2193 {
2194         struct inode *orphan_dir_inode = NULL;
2195         struct buffer_head *orphan_dir_bh = NULL;
2196         int ret = 0;
2197
2198         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2199                                            &orphan_dir_bh);
2200         if (ret < 0) {
2201                 mlog_errno(ret);
2202                 return ret;
2203         }
2204
2205         ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2206                                          blkno, name, lookup, dio);
2207         if (ret < 0) {
2208                 mlog_errno(ret);
2209                 goto out;
2210         }
2211
2212         *ret_orphan_dir = orphan_dir_inode;
2213
2214 out:
2215         brelse(orphan_dir_bh);
2216
2217         if (ret) {
2218                 ocfs2_inode_unlock(orphan_dir_inode, 1);
2219                 inode_unlock(orphan_dir_inode);
2220                 iput(orphan_dir_inode);
2221         }
2222
2223         if (ret)
2224                 mlog_errno(ret);
2225         return ret;
2226 }
2227
2228 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2229                             handle_t *handle,
2230                             struct inode *inode,
2231                             struct buffer_head *fe_bh,
2232                             char *name,
2233                             struct ocfs2_dir_lookup_result *lookup,
2234                             struct inode *orphan_dir_inode,
2235                             bool dio)
2236 {
2237         struct buffer_head *orphan_dir_bh = NULL;
2238         int status = 0;
2239         struct ocfs2_dinode *orphan_fe;
2240         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2241         int namelen = dio ?
2242                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2243                         OCFS2_ORPHAN_NAMELEN;
2244
2245         trace_ocfs2_orphan_add_begin(
2246                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2247
2248         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2249         if (status < 0) {
2250                 mlog_errno(status);
2251                 goto leave;
2252         }
2253
2254         status = ocfs2_journal_access_di(handle,
2255                                          INODE_CACHE(orphan_dir_inode),
2256                                          orphan_dir_bh,
2257                                          OCFS2_JOURNAL_ACCESS_WRITE);
2258         if (status < 0) {
2259                 mlog_errno(status);
2260                 goto leave;
2261         }
2262
2263         /*
2264          * We're going to journal the change of i_flags and i_orphaned_slot.
2265          * It's safe anyway, though some callers may duplicate the journaling.
2266          * Journaling within the func just make the logic look more
2267          * straightforward.
2268          */
2269         status = ocfs2_journal_access_di(handle,
2270                                          INODE_CACHE(inode),
2271                                          fe_bh,
2272                                          OCFS2_JOURNAL_ACCESS_WRITE);
2273         if (status < 0) {
2274                 mlog_errno(status);
2275                 goto leave;
2276         }
2277
2278         /* we're a cluster, and nlink can change on disk from
2279          * underneath us... */
2280         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2281         if (S_ISDIR(inode->i_mode))
2282                 ocfs2_add_links_count(orphan_fe, 1);
2283         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2284         ocfs2_journal_dirty(handle, orphan_dir_bh);
2285
2286         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2287                                    namelen, inode,
2288                                    OCFS2_I(inode)->ip_blkno,
2289                                    orphan_dir_bh, lookup);
2290         if (status < 0) {
2291                 mlog_errno(status);
2292                 goto rollback;
2293         }
2294
2295         if (dio) {
2296                 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2297                  * slot.
2298                  */
2299                 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2300                 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2301         } else {
2302                 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2303                 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2304
2305                 /* Record which orphan dir our inode now resides
2306                  * in. delete_inode will use this to determine which orphan
2307                  * dir to lock. */
2308                 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2309         }
2310
2311         ocfs2_journal_dirty(handle, fe_bh);
2312
2313         trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2314                                    osb->slot_num);
2315
2316 rollback:
2317         if (status < 0) {
2318                 if (S_ISDIR(inode->i_mode))
2319                         ocfs2_add_links_count(orphan_fe, -1);
2320                 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2321         }
2322
2323 leave:
2324         brelse(orphan_dir_bh);
2325
2326         return status;
2327 }
2328
2329 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2330 int ocfs2_orphan_del(struct ocfs2_super *osb,
2331                      handle_t *handle,
2332                      struct inode *orphan_dir_inode,
2333                      struct inode *inode,
2334                      struct buffer_head *orphan_dir_bh,
2335                      bool dio)
2336 {
2337         const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN;
2338         char name[namelen + 1];
2339         struct ocfs2_dinode *orphan_fe;
2340         int status = 0;
2341         struct ocfs2_dir_lookup_result lookup = { NULL, };
2342
2343         if (dio) {
2344                 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2345                                 OCFS2_DIO_ORPHAN_PREFIX);
2346                 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2347                         status = -EINVAL;
2348                         mlog_errno(status);
2349                         return status;
2350                 }
2351
2352                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2353                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2354         } else
2355                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2356         if (status < 0) {
2357                 mlog_errno(status);
2358                 goto leave;
2359         }
2360
2361         trace_ocfs2_orphan_del(
2362              (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2363              name, strlen(name));
2364
2365         status = ocfs2_journal_access_di(handle,
2366                                          INODE_CACHE(orphan_dir_inode),
2367                                          orphan_dir_bh,
2368                                          OCFS2_JOURNAL_ACCESS_WRITE);
2369         if (status < 0) {
2370                 mlog_errno(status);
2371                 goto leave;
2372         }
2373
2374         /* find it's spot in the orphan directory */
2375         status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2376                                   &lookup);
2377         if (status) {
2378                 mlog_errno(status);
2379                 goto leave;
2380         }
2381
2382         /* remove it from the orphan directory */
2383         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2384         if (status < 0) {
2385                 mlog_errno(status);
2386                 goto leave;
2387         }
2388
2389         /* do the i_nlink dance! :) */
2390         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2391         if (S_ISDIR(inode->i_mode))
2392                 ocfs2_add_links_count(orphan_fe, -1);
2393         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2394         ocfs2_journal_dirty(handle, orphan_dir_bh);
2395
2396 leave:
2397         ocfs2_free_dir_lookup_result(&lookup);
2398
2399         if (status)
2400                 mlog_errno(status);
2401         return status;
2402 }
2403
2404 /**
2405  * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2406  * allocated file. This is different from the typical 'add to orphan dir'
2407  * operation in that the inode does not yet exist. This is a problem because
2408  * the orphan dir stringifies the inode block number to come up with it's
2409  * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2410  * problem. This function works around it by calling deeper into the orphan
2411  * and suballoc code than other callers. Use this only by necessity.
2412  * @dir: The directory which this inode will ultimately wind up under - not the
2413  * orphan dir!
2414  * @dir_bh: buffer_head the @dir inode block
2415  * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2416  * with the string to be used for orphan dirent. Pass back to the orphan dir
2417  * code.
2418  * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2419  * dir code.
2420  * @ret_di_blkno: block number where the new inode will be allocated.
2421  * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2422  * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2423  *
2424  * Returns zero on success and the ret_orphan_dir, name and lookup
2425  * fields will be populated.
2426  *
2427  * Returns non-zero on failure.
2428  */
2429 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2430                                         struct buffer_head *dir_bh,
2431                                         char *orphan_name,
2432                                         struct inode **ret_orphan_dir,
2433                                         u64 *ret_di_blkno,
2434                                         struct ocfs2_dir_lookup_result *orphan_insert,
2435                                         struct ocfs2_alloc_context **ret_inode_ac)
2436 {
2437         int ret;
2438         u64 di_blkno;
2439         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2440         struct inode *orphan_dir = NULL;
2441         struct buffer_head *orphan_dir_bh = NULL;
2442         struct ocfs2_alloc_context *inode_ac = NULL;
2443
2444         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2445         if (ret < 0) {
2446                 mlog_errno(ret);
2447                 return ret;
2448         }
2449
2450         /* reserve an inode spot */
2451         ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2452         if (ret < 0) {
2453                 if (ret != -ENOSPC)
2454                         mlog_errno(ret);
2455                 goto out;
2456         }
2457
2458         ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2459                                        &di_blkno);
2460         if (ret) {
2461                 mlog_errno(ret);
2462                 goto out;
2463         }
2464
2465         ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2466                                          di_blkno, orphan_name, orphan_insert,
2467                                          false);
2468         if (ret < 0) {
2469                 mlog_errno(ret);
2470                 goto out;
2471         }
2472
2473 out:
2474         if (ret == 0) {
2475                 *ret_orphan_dir = orphan_dir;
2476                 *ret_di_blkno = di_blkno;
2477                 *ret_inode_ac = inode_ac;
2478                 /*
2479                  * orphan_name and orphan_insert are already up to
2480                  * date via prepare_orphan_dir
2481                  */
2482         } else {
2483                 /* Unroll reserve_new_inode* */
2484                 if (inode_ac)
2485                         ocfs2_free_alloc_context(inode_ac);
2486
2487                 /* Unroll orphan dir locking */
2488                 inode_unlock(orphan_dir);
2489                 ocfs2_inode_unlock(orphan_dir, 1);
2490                 iput(orphan_dir);
2491         }
2492
2493         brelse(orphan_dir_bh);
2494
2495         return ret;
2496 }
2497
2498 int ocfs2_create_inode_in_orphan(struct inode *dir,
2499                                  int mode,
2500                                  struct inode **new_inode)
2501 {
2502         int status, did_quota_inode = 0;
2503         struct inode *inode = NULL;
2504         struct inode *orphan_dir = NULL;
2505         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2506         struct ocfs2_dinode *di = NULL;
2507         handle_t *handle = NULL;
2508         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2509         struct buffer_head *parent_di_bh = NULL;
2510         struct buffer_head *new_di_bh = NULL;
2511         struct ocfs2_alloc_context *inode_ac = NULL;
2512         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2513         u64 di_blkno, suballoc_loc;
2514         u16 suballoc_bit;
2515
2516         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2517         if (status < 0) {
2518                 if (status != -ENOENT)
2519                         mlog_errno(status);
2520                 return status;
2521         }
2522
2523         status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2524                                               orphan_name, &orphan_dir,
2525                                               &di_blkno, &orphan_insert, &inode_ac);
2526         if (status < 0) {
2527                 if (status != -ENOSPC)
2528                         mlog_errno(status);
2529                 goto leave;
2530         }
2531
2532         inode = ocfs2_get_init_inode(dir, mode);
2533         if (IS_ERR(inode)) {
2534                 status = PTR_ERR(inode);
2535                 inode = NULL;
2536                 mlog_errno(status);
2537                 goto leave;
2538         }
2539
2540         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2541         if (IS_ERR(handle)) {
2542                 status = PTR_ERR(handle);
2543                 handle = NULL;
2544                 mlog_errno(status);
2545                 goto leave;
2546         }
2547
2548         status = dquot_alloc_inode(inode);
2549         if (status)
2550                 goto leave;
2551         did_quota_inode = 1;
2552
2553         status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2554                                               &suballoc_loc,
2555                                               &suballoc_bit, di_blkno);
2556         if (status < 0) {
2557                 mlog_errno(status);
2558                 goto leave;
2559         }
2560
2561         clear_nlink(inode);
2562         /* do the real work now. */
2563         status = __ocfs2_mknod_locked(dir, inode,
2564                                       0, &new_di_bh, parent_di_bh, handle,
2565                                       inode_ac, di_blkno, suballoc_loc,
2566                                       suballoc_bit);
2567         if (status < 0) {
2568                 mlog_errno(status);
2569                 goto leave;
2570         }
2571
2572         di = (struct ocfs2_dinode *)new_di_bh->b_data;
2573         status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2574                                   &orphan_insert, orphan_dir, false);
2575         if (status < 0) {
2576                 mlog_errno(status);
2577                 goto leave;
2578         }
2579
2580         /* get open lock so that only nodes can't remove it from orphan dir. */
2581         status = ocfs2_open_lock(inode);
2582         if (status < 0)
2583                 mlog_errno(status);
2584
2585         insert_inode_hash(inode);
2586 leave:
2587         if (status < 0 && did_quota_inode)
2588                 dquot_free_inode(inode);
2589         if (handle)
2590                 ocfs2_commit_trans(osb, handle);
2591
2592         if (orphan_dir) {
2593                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2594                 ocfs2_inode_unlock(orphan_dir, 1);
2595                 inode_unlock(orphan_dir);
2596                 iput(orphan_dir);
2597         }
2598
2599         if ((status < 0) && inode) {
2600                 clear_nlink(inode);
2601                 iput(inode);
2602         }
2603
2604         if (inode_ac)
2605                 ocfs2_free_alloc_context(inode_ac);
2606
2607         brelse(new_di_bh);
2608
2609         if (!status)
2610                 *new_inode = inode;
2611
2612         ocfs2_free_dir_lookup_result(&orphan_insert);
2613
2614         ocfs2_inode_unlock(dir, 1);
2615         brelse(parent_di_bh);
2616         return status;
2617 }
2618
2619 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2620         struct inode *inode)
2621 {
2622         char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2623         struct inode *orphan_dir_inode = NULL;
2624         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2625         struct buffer_head *di_bh = NULL;
2626         int status = 0;
2627         handle_t *handle = NULL;
2628         struct ocfs2_dinode *di = NULL;
2629
2630         status = ocfs2_inode_lock(inode, &di_bh, 1);
2631         if (status < 0) {
2632                 mlog_errno(status);
2633                 goto bail;
2634         }
2635
2636         di = (struct ocfs2_dinode *) di_bh->b_data;
2637         /*
2638          * Another append dio crashed?
2639          * If so, manually recover it first.
2640          */
2641         if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2642                 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2643                 if (status < 0) {
2644                         if (status != -ENOSPC)
2645                                 mlog_errno(status);
2646                         goto bail_unlock_inode;
2647                 }
2648
2649                 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2650                 if (status < 0) {
2651                         mlog_errno(status);
2652                         goto bail_unlock_inode;
2653                 }
2654         }
2655
2656         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2657                         OCFS2_I(inode)->ip_blkno,
2658                         orphan_name,
2659                         &orphan_insert,
2660                         true);
2661         if (status < 0) {
2662                 mlog_errno(status);
2663                 goto bail_unlock_inode;
2664         }
2665
2666         handle = ocfs2_start_trans(osb,
2667                         OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2668         if (IS_ERR(handle)) {
2669                 status = PTR_ERR(handle);
2670                 goto bail_unlock_orphan;
2671         }
2672
2673         status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2674                         &orphan_insert, orphan_dir_inode, true);
2675         if (status)
2676                 mlog_errno(status);
2677
2678         ocfs2_commit_trans(osb, handle);
2679
2680 bail_unlock_orphan:
2681         ocfs2_inode_unlock(orphan_dir_inode, 1);
2682         inode_unlock(orphan_dir_inode);
2683         iput(orphan_dir_inode);
2684
2685         ocfs2_free_dir_lookup_result(&orphan_insert);
2686
2687 bail_unlock_inode:
2688         ocfs2_inode_unlock(inode, 1);
2689         brelse(di_bh);
2690
2691 bail:
2692         return status;
2693 }
2694
2695 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2696                 struct inode *inode, struct buffer_head *di_bh,
2697                 int update_isize, loff_t end)
2698 {
2699         struct inode *orphan_dir_inode = NULL;
2700         struct buffer_head *orphan_dir_bh = NULL;
2701         struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2702         handle_t *handle = NULL;
2703         int status = 0;
2704
2705         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2706                         ORPHAN_DIR_SYSTEM_INODE,
2707                         le16_to_cpu(di->i_dio_orphaned_slot));
2708         if (!orphan_dir_inode) {
2709                 status = -ENOENT;
2710                 mlog_errno(status);
2711                 goto bail;
2712         }
2713
2714         inode_lock(orphan_dir_inode);
2715         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2716         if (status < 0) {
2717                 inode_unlock(orphan_dir_inode);
2718                 iput(orphan_dir_inode);
2719                 mlog_errno(status);
2720                 goto bail;
2721         }
2722
2723         handle = ocfs2_start_trans(osb,
2724                         OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2725         if (IS_ERR(handle)) {
2726                 status = PTR_ERR(handle);
2727                 goto bail_unlock_orphan;
2728         }
2729
2730         BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2731
2732         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2733                                 inode, orphan_dir_bh, true);
2734         if (status < 0) {
2735                 mlog_errno(status);
2736                 goto bail_commit;
2737         }
2738
2739         status = ocfs2_journal_access_di(handle,
2740                         INODE_CACHE(inode),
2741                         di_bh,
2742                         OCFS2_JOURNAL_ACCESS_WRITE);
2743         if (status < 0) {
2744                 mlog_errno(status);
2745                 goto bail_commit;
2746         }
2747
2748         di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2749         di->i_dio_orphaned_slot = 0;
2750
2751         if (update_isize) {
2752                 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2753                 if (status)
2754                         mlog_errno(status);
2755         } else
2756                 ocfs2_journal_dirty(handle, di_bh);
2757
2758 bail_commit:
2759         ocfs2_commit_trans(osb, handle);
2760
2761 bail_unlock_orphan:
2762         ocfs2_inode_unlock(orphan_dir_inode, 1);
2763         inode_unlock(orphan_dir_inode);
2764         brelse(orphan_dir_bh);
2765         iput(orphan_dir_inode);
2766
2767 bail:
2768         return status;
2769 }
2770
2771 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2772                                    struct inode *inode,
2773                                    struct dentry *dentry)
2774 {
2775         int status = 0;
2776         struct buffer_head *parent_di_bh = NULL;
2777         handle_t *handle = NULL;
2778         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2779         struct ocfs2_dinode *dir_di, *di;
2780         struct inode *orphan_dir_inode = NULL;
2781         struct buffer_head *orphan_dir_bh = NULL;
2782         struct buffer_head *di_bh = NULL;
2783         struct ocfs2_dir_lookup_result lookup = { NULL, };
2784
2785         trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2786                                 dentry->d_name.len, dentry->d_name.name,
2787                                 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2788                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2789
2790         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2791         if (status < 0) {
2792                 if (status != -ENOENT)
2793                         mlog_errno(status);
2794                 return status;
2795         }
2796
2797         dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2798         if (!dir_di->i_links_count) {
2799                 /* can't make a file in a deleted directory. */
2800                 status = -ENOENT;
2801                 goto leave;
2802         }
2803
2804         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2805                                            dentry->d_name.len);
2806         if (status)
2807                 goto leave;
2808
2809         /* get a spot inside the dir. */
2810         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2811                                               dentry->d_name.name,
2812                                               dentry->d_name.len, &lookup);
2813         if (status < 0) {
2814                 mlog_errno(status);
2815                 goto leave;
2816         }
2817
2818         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2819                                                        ORPHAN_DIR_SYSTEM_INODE,
2820                                                        osb->slot_num);
2821         if (!orphan_dir_inode) {
2822                 status = -ENOENT;
2823                 mlog_errno(status);
2824                 goto leave;
2825         }
2826
2827         inode_lock(orphan_dir_inode);
2828
2829         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2830         if (status < 0) {
2831                 mlog_errno(status);
2832                 inode_unlock(orphan_dir_inode);
2833                 iput(orphan_dir_inode);
2834                 goto leave;
2835         }
2836
2837         status = ocfs2_read_inode_block(inode, &di_bh);
2838         if (status < 0) {
2839                 mlog_errno(status);
2840                 goto orphan_unlock;
2841         }
2842
2843         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2844         if (IS_ERR(handle)) {
2845                 status = PTR_ERR(handle);
2846                 handle = NULL;
2847                 mlog_errno(status);
2848                 goto orphan_unlock;
2849         }
2850
2851         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2852                                          di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2853         if (status < 0) {
2854                 mlog_errno(status);
2855                 goto out_commit;
2856         }
2857
2858         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2859                                   orphan_dir_bh, false);
2860         if (status < 0) {
2861                 mlog_errno(status);
2862                 goto out_commit;
2863         }
2864
2865         di = (struct ocfs2_dinode *)di_bh->b_data;
2866         di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2867         di->i_orphaned_slot = 0;
2868         set_nlink(inode, 1);
2869         ocfs2_set_links_count(di, inode->i_nlink);
2870         ocfs2_update_inode_fsync_trans(handle, inode, 1);
2871         ocfs2_journal_dirty(handle, di_bh);
2872
2873         status = ocfs2_add_entry(handle, dentry, inode,
2874                                  OCFS2_I(inode)->ip_blkno, parent_di_bh,
2875                                  &lookup);
2876         if (status < 0) {
2877                 mlog_errno(status);
2878                 goto out_commit;
2879         }
2880
2881         status = ocfs2_dentry_attach_lock(dentry, inode,
2882                                           OCFS2_I(dir)->ip_blkno);
2883         if (status) {
2884                 mlog_errno(status);
2885                 goto out_commit;
2886         }
2887
2888         d_instantiate(dentry, inode);
2889         status = 0;
2890 out_commit:
2891         ocfs2_commit_trans(osb, handle);
2892 orphan_unlock:
2893         ocfs2_inode_unlock(orphan_dir_inode, 1);
2894         inode_unlock(orphan_dir_inode);
2895         iput(orphan_dir_inode);
2896 leave:
2897
2898         ocfs2_inode_unlock(dir, 1);
2899
2900         brelse(di_bh);
2901         brelse(parent_di_bh);
2902         brelse(orphan_dir_bh);
2903
2904         ocfs2_free_dir_lookup_result(&lookup);
2905
2906         if (status)
2907                 mlog_errno(status);
2908
2909         return status;
2910 }
2911
2912 const struct inode_operations ocfs2_dir_iops = {
2913         .create         = ocfs2_create,
2914         .lookup         = ocfs2_lookup,
2915         .link           = ocfs2_link,
2916         .unlink         = ocfs2_unlink,
2917         .rmdir          = ocfs2_unlink,
2918         .symlink        = ocfs2_symlink,
2919         .mkdir          = ocfs2_mkdir,
2920         .mknod          = ocfs2_mknod,
2921         .rename         = ocfs2_rename,
2922         .setattr        = ocfs2_setattr,
2923         .getattr        = ocfs2_getattr,
2924         .permission     = ocfs2_permission,
2925         .listxattr      = ocfs2_listxattr,
2926         .fiemap         = ocfs2_fiemap,
2927         .get_acl        = ocfs2_iop_get_acl,
2928         .set_acl        = ocfs2_iop_set_acl,
2929 };