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 buffer_head *new_fe_bh = NULL;
 248         struct inode *inode = NULL;
 249         struct ocfs2_alloc_context *inode_ac = NULL;
 250         struct ocfs2_alloc_context *data_ac = NULL;
 251         struct ocfs2_alloc_context *meta_ac = NULL;
 252         int want_clusters = 0;
 253         int want_meta = 0;
 254         int xattr_credits = 0;
 255         struct ocfs2_security_xattr_info si = {
 256                 .enable = 1,
 257         };
 258         int did_quota_inode = 0;
 259         struct ocfs2_dir_lookup_result lookup = { NULL, };
 260         sigset_t oldset;
 261         int did_block_signals = 0;
 262         struct ocfs2_dentry_lock *dl = NULL;
 263
 264         trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 265                           (unsigned long long)OCFS2_I(dir)->ip_blkno,
 266                           (unsigned long)dev, mode);
 267
 268         status = dquot_initialize(dir);
 269         if (status) {
 270                 mlog_errno(status);
 271                 return status;
 272         }
 273
 274         /* get our super block */
 275         osb = OCFS2_SB(dir->i_sb);
 276
 277         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
 278         if (status < 0) {
 279                 if (status != -ENOENT)
 280                         mlog_errno(status);
 281                 return status;
 282         }
 283
 284         if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
 285                 status = -EMLINK;
 286                 goto leave;
 287         }
 288
 289         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
 290         if (!ocfs2_read_links_count(dirfe)) {
 291                 /* can't make a file in a deleted directory. */
 292                 status = -ENOENT;
 293                 goto leave;
 294         }
 295
 296         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 297                                            dentry->d_name.len);
 298         if (status)
 299                 goto leave;
 300
 301         /* get a spot inside the dir. */
 302         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 303                                               dentry->d_name.name,
 304                                               dentry->d_name.len, &lookup);
 305         if (status < 0) {
 306                 mlog_errno(status);
 307                 goto leave;
 308         }
 309
 310         /* reserve an inode spot */
 311         status = ocfs2_reserve_new_inode(osb, &inode_ac);
 312         if (status < 0) {
 313                 if (status != -ENOSPC)
 314                         mlog_errno(status);
 315                 goto leave;
 316         }
 317
 318         inode = ocfs2_get_init_inode(dir, mode);
 319         if (IS_ERR(inode)) {
 320                 status = PTR_ERR(inode);
 321                 inode = NULL;
 322                 mlog_errno(status);
 323                 goto leave;
 324         }
 325
 326         /* get security xattr */
 327         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
 328         if (status) {
 329                 if (status == -EOPNOTSUPP)
 330                         si.enable = 0;
 331                 else {
 332                         mlog_errno(status);
 333                         goto leave;
 334                 }
 335         }
 336
 337         /* calculate meta data/clusters for setting security and acl xattr */
 338         status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
 339                                        &si, &want_clusters,
 340                                        &xattr_credits, &want_meta);
 341         if (status < 0) {
 342                 mlog_errno(status);
 343                 goto leave;
 344         }
 345
 346         /* Reserve a cluster if creating an extent based directory. */
 347         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
 348                 want_clusters += 1;
 349
 350                 /* Dir indexing requires extra space as well */
 351                 if (ocfs2_supports_indexed_dirs(osb))
 352                         want_meta++;
 353         }
 354
 355         status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
 356         if (status < 0) {
 357                 if (status != -ENOSPC)
 358                         mlog_errno(status);
 359                 goto leave;
 360         }
 361
 362         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
 363         if (status < 0) {
 364                 if (status != -ENOSPC)
 365                         mlog_errno(status);
 366                 goto leave;
 367         }
 368
 369         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
 370                                                             S_ISDIR(mode),
 371                                                             xattr_credits));
 372         if (IS_ERR(handle)) {
 373                 status = PTR_ERR(handle);
 374                 handle = NULL;
 375                 mlog_errno(status);
 376                 goto leave;
 377         }
 378
 379         /* Starting to change things, restart is no longer possible. */
 380         ocfs2_block_signals(&oldset);
 381         did_block_signals = 1;
 382
 383         status = dquot_alloc_inode(inode);
 384         if (status)
 385                 goto leave;
 386         did_quota_inode = 1;
 387
 388         /* do the real work now. */
 389         status = ocfs2_mknod_locked(osb, dir, inode, dev,
 390                                     &new_fe_bh, parent_fe_bh, handle,
 391                                     inode_ac);
 392         if (status < 0) {
 393                 mlog_errno(status);
 394                 goto leave;
 395         }
 396
 397         if (S_ISDIR(mode)) {
 398                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
 399                                             new_fe_bh, data_ac, meta_ac);
 400                 if (status < 0) {
 401                         mlog_errno(status);
 402                         goto leave;
 403                 }
 404
 405                 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
 406                                                  parent_fe_bh,
 407                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 408                 if (status < 0) {
 409                         mlog_errno(status);
 410                         goto leave;
 411                 }
 412                 ocfs2_add_links_count(dirfe, 1);
 413                 ocfs2_journal_dirty(handle, parent_fe_bh);
 414                 inc_nlink(dir);
 415         }
 416
 417         status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
 418                          meta_ac, data_ac);
 419
 420         if (status < 0) {
 421                 mlog_errno(status);
 422                 goto leave;
 423         }
 424
 425         if (si.enable) {
 426                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
 427                                                  meta_ac, data_ac);
 428                 if (status < 0) {
 429                         mlog_errno(status);
 430                         goto leave;
 431                 }
 432         }
 433
 434         /*
 435          * Do this before adding the entry to the directory. We add
 436          * also set d_op after success so that ->d_iput() will cleanup
 437          * the dentry lock even if ocfs2_add_entry() fails below.
 438          */
 439         status = ocfs2_dentry_attach_lock(dentry, inode,
 440                                           OCFS2_I(dir)->ip_blkno);
 441         if (status) {
 442                 mlog_errno(status);
 443                 goto leave;
 444         }
 445
 446         dl = dentry->d_fsdata;
 447
 448         status = ocfs2_add_entry(handle, dentry, inode,
 449                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
 450                                  &lookup);
 451         if (status < 0) {
 452                 mlog_errno(status);
 453                 goto leave;
 454         }
 455
 456         insert_inode_hash(inode);
 457         d_instantiate(dentry, inode);
 458         status = 0;
 459 leave:
 460         if (status < 0 && did_quota_inode)
 461                 dquot_free_inode(inode);
 462         if (handle)
 463                 ocfs2_commit_trans(osb, handle);
 464
 465         ocfs2_inode_unlock(dir, 1);
 466         if (did_block_signals)
 467                 ocfs2_unblock_signals(&oldset);
 468
 469         brelse(new_fe_bh);
 470         brelse(parent_fe_bh);
 471         kfree(si.value);
 472
 473         ocfs2_free_dir_lookup_result(&lookup);
 474
 475         if (inode_ac)
 476                 ocfs2_free_alloc_context(inode_ac);
 477
 478         if (data_ac)
 479                 ocfs2_free_alloc_context(data_ac);
 480
 481         if (meta_ac)
 482                 ocfs2_free_alloc_context(meta_ac);
 483
 484         /*
 485          * We should call iput after the i_mutex of the bitmap been
 486          * unlocked in ocfs2_free_alloc_context, or the
 487          * ocfs2_delete_inode will mutex_lock again.
 488          */
 489         if ((status < 0) && inode) {
 490                 if (dl)
 491                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
 492
 493                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
 494                 clear_nlink(inode);
 495                 iput(inode);
 496         }
 497
 498         if (status)
 499                 mlog_errno(status);
 500
 501         return status;
 502 }
 503
 504 static int __ocfs2_mknod_locked(struct inode *dir,
 505                                 struct inode *inode,
 506                                 dev_t dev,
 507                                 struct buffer_head **new_fe_bh,
 508                                 struct buffer_head *parent_fe_bh,
 509                                 handle_t *handle,
 510                                 struct ocfs2_alloc_context *inode_ac,
 511                                 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
 512 {
 513         int status = 0;
 514         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 515         struct ocfs2_dinode *fe = NULL;
 516         struct ocfs2_extent_list *fel;
 517         u16 feat;
 518         struct ocfs2_inode_info *oi = OCFS2_I(inode);
 519         struct timespec64 ts;
 520
 521         *new_fe_bh = NULL;
 522
 523         /* populate as many fields early on as possible - many of
 524          * these are used by the support functions here and in
 525          * callers. */
 526         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
 527         OCFS2_I(inode)->ip_blkno = fe_blkno;
 528         spin_lock(&osb->osb_lock);
 529         inode->i_generation = osb->s_next_generation++;
 530         spin_unlock(&osb->osb_lock);
 531
 532         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
 533         if (!*new_fe_bh) {
 534                 status = -ENOMEM;
 535                 mlog_errno(status);
 536                 goto leave;
 537         }
 538         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
 539
 540         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
 541                                          *new_fe_bh,
 542                                          OCFS2_JOURNAL_ACCESS_CREATE);
 543         if (status < 0) {
 544                 mlog_errno(status);
 545                 goto leave;
 546         }
 547
 548         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
 549         memset(fe, 0, osb->sb->s_blocksize);
 550
 551         fe->i_generation = cpu_to_le32(inode->i_generation);
 552         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
 553         fe->i_blkno = cpu_to_le64(fe_blkno);
 554         fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
 555         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
 556         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
 557         fe->i_uid = cpu_to_le32(i_uid_read(inode));
 558         fe->i_gid = cpu_to_le32(i_gid_read(inode));
 559         fe->i_mode = cpu_to_le16(inode->i_mode);
 560         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 561                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
 562
 563         ocfs2_set_links_count(fe, inode->i_nlink);
 564
 565         fe->i_last_eb_blk = 0;
 566         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 567         fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
 568         ktime_get_real_ts64(&ts);
 569         fe->i_atime = fe->i_ctime = fe->i_mtime =
 570                 cpu_to_le64(ts.tv_sec);
 571         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
 572                 cpu_to_le32(ts.tv_nsec);
 573         fe->i_dtime = 0;
 574
 575         /*
 576          * If supported, directories start with inline data. If inline
 577          * isn't supported, but indexing is, we start them as indexed.
 578          */
 579         feat = le16_to_cpu(fe->i_dyn_features);
 580         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
 581                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
 582
 583                 fe->id2.i_data.id_count = cpu_to_le16(
 584                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
 585         } else {
 586                 fel = &fe->id2.i_list;
 587                 fel->l_tree_depth = 0;
 588                 fel->l_next_free_rec = 0;
 589                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
 590         }
 591
 592         ocfs2_journal_dirty(handle, *new_fe_bh);
 593
 594         ocfs2_populate_inode(inode, fe, 1);
 595         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
 596         if (!ocfs2_mount_local(osb)) {
 597                 status = ocfs2_create_new_inode_locks(inode);
 598                 if (status < 0)
 599                         mlog_errno(status);
 600         }
 601
 602         oi->i_sync_tid = handle->h_transaction->t_tid;
 603         oi->i_datasync_tid = handle->h_transaction->t_tid;
 604
 605 leave:
 606         if (status < 0) {
 607                 if (*new_fe_bh) {
 608                         brelse(*new_fe_bh);
 609                         *new_fe_bh = NULL;
 610                 }
 611         }
 612
 613         if (status)
 614                 mlog_errno(status);
 615         return status;
 616 }
 617
 618 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 619                               struct inode *dir,
 620                               struct inode *inode,
 621                               dev_t dev,
 622                               struct buffer_head **new_fe_bh,
 623                               struct buffer_head *parent_fe_bh,
 624                               handle_t *handle,
 625                               struct ocfs2_alloc_context *inode_ac)
 626 {
 627         int status = 0;
 628         u64 suballoc_loc, fe_blkno = 0;
 629         u16 suballoc_bit;
 630
 631         *new_fe_bh = NULL;
 632
 633         status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
 634                                        inode_ac, &suballoc_loc,
 635                                        &suballoc_bit, &fe_blkno);
 636         if (status < 0) {
 637                 mlog_errno(status);
 638                 return status;
 639         }
 640
 641         status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
 642                                     parent_fe_bh, handle, inode_ac,
 643                                     fe_blkno, suballoc_loc, suballoc_bit);
 644         if (status < 0) {
 645                 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit);
 646                 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode,
 647                                 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1);
 648                 if (tmp)
 649                         mlog_errno(tmp);
 650         }
 651
 652         return status;
 653 }
 654
 655 static int ocfs2_mkdir(struct inode *dir,
 656                        struct dentry *dentry,
 657                        umode_t mode)
 658 {
 659         int ret;
 660
 661         trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 662                           OCFS2_I(dir)->ip_blkno, mode);
 663         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
 664         if (ret)
 665                 mlog_errno(ret);
 666
 667         return ret;
 668 }
 669
 670 static int ocfs2_create(struct inode *dir,
 671                         struct dentry *dentry,
 672                         umode_t mode,
 673                         bool excl)
 674 {
 675         int ret;
 676
 677         trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 678                            (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
 679         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
 680         if (ret)
 681                 mlog_errno(ret);
 682
 683         return ret;
 684 }
 685
 686 static int ocfs2_link(struct dentry *old_dentry,
 687                       struct inode *dir,
 688                       struct dentry *dentry)
 689 {
 690         handle_t *handle;
 691         struct inode *inode = d_inode(old_dentry);
 692         struct inode *old_dir = d_inode(old_dentry->d_parent);
 693         int err;
 694         struct buffer_head *fe_bh = NULL;
 695         struct buffer_head *old_dir_bh = NULL;
 696         struct buffer_head *parent_fe_bh = NULL;
 697         struct ocfs2_dinode *fe = NULL;
 698         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 699         struct ocfs2_dir_lookup_result lookup = { NULL, };
 700         sigset_t oldset;
 701         u64 old_de_ino;
 702
 703         trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
 704                          old_dentry->d_name.len, old_dentry->d_name.name,
 705                          dentry->d_name.len, dentry->d_name.name);
 706
 707         if (S_ISDIR(inode->i_mode))
 708                 return -EPERM;
 709
 710         err = dquot_initialize(dir);
 711         if (err) {
 712                 mlog_errno(err);
 713                 return err;
 714         }
 715
 716         err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
 717                         &parent_fe_bh, dir, 0);
 718         if (err < 0) {
 719                 if (err != -ENOENT)
 720                         mlog_errno(err);
 721                 return err;
 722         }
 723
 724         /* make sure both dirs have bhs
 725          * get an extra ref on old_dir_bh if old==new */
 726         if (!parent_fe_bh) {
 727                 if (old_dir_bh) {
 728                         parent_fe_bh = old_dir_bh;
 729                         get_bh(parent_fe_bh);
 730                 } else {
 731                         mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
 732                         err = -EIO;
 733                         goto out;
 734                 }
 735         }
 736
 737         if (!dir->i_nlink) {
 738                 err = -ENOENT;
 739                 goto out;
 740         }
 741
 742         err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
 743                         old_dentry->d_name.len, &old_de_ino);
 744         if (err) {
 745                 err = -ENOENT;
 746                 goto out;
 747         }
 748
 749         /*
 750          * Check whether another node removed the source inode while we
 751          * were in the vfs.
 752          */
 753         if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
 754                 err = -ENOENT;
 755                 goto out;
 756         }
 757
 758         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 759                                         dentry->d_name.len);
 760         if (err)
 761                 goto out;
 762
 763         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 764                                            dentry->d_name.name,
 765                                            dentry->d_name.len, &lookup);
 766         if (err < 0) {
 767                 mlog_errno(err);
 768                 goto out;
 769         }
 770
 771         err = ocfs2_inode_lock(inode, &fe_bh, 1);
 772         if (err < 0) {
 773                 if (err != -ENOENT)
 774                         mlog_errno(err);
 775                 goto out;
 776         }
 777
 778         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 779         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
 780                 err = -EMLINK;
 781                 goto out_unlock_inode;
 782         }
 783
 784         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
 785         if (IS_ERR(handle)) {
 786                 err = PTR_ERR(handle);
 787                 handle = NULL;
 788                 mlog_errno(err);
 789                 goto out_unlock_inode;
 790         }
 791
 792         /* Starting to change things, restart is no longer possible. */
 793         ocfs2_block_signals(&oldset);
 794
 795         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 796                                       OCFS2_JOURNAL_ACCESS_WRITE);
 797         if (err < 0) {
 798                 mlog_errno(err);
 799                 goto out_commit;
 800         }
 801
 802         inc_nlink(inode);
 803         inode->i_ctime = current_time(inode);
 804         ocfs2_set_links_count(fe, inode->i_nlink);
 805         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 806         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 807         ocfs2_journal_dirty(handle, fe_bh);
 808
 809         err = ocfs2_add_entry(handle, dentry, inode,
 810                               OCFS2_I(inode)->ip_blkno,
 811                               parent_fe_bh, &lookup);
 812         if (err) {
 813                 ocfs2_add_links_count(fe, -1);
 814                 drop_nlink(inode);
 815                 mlog_errno(err);
 816                 goto out_commit;
 817         }
 818
 819         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
 820         if (err) {
 821                 mlog_errno(err);
 822                 goto out_commit;
 823         }
 824
 825         ihold(inode);
 826         d_instantiate(dentry, inode);
 827
 828 out_commit:
 829         ocfs2_commit_trans(osb, handle);
 830         ocfs2_unblock_signals(&oldset);
 831 out_unlock_inode:
 832         ocfs2_inode_unlock(inode, 1);
 833
 834 out:
 835         ocfs2_double_unlock(old_dir, dir);
 836
 837         brelse(fe_bh);
 838         brelse(parent_fe_bh);
 839         brelse(old_dir_bh);
 840
 841         ocfs2_free_dir_lookup_result(&lookup);
 842
 843         if (err)
 844                 mlog_errno(err);
 845
 846         return err;
 847 }
 848
 849 /*
 850  * Takes and drops an exclusive lock on the given dentry. This will
 851  * force other nodes to drop it.
 852  */
 853 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 854 {
 855         int ret;
 856
 857         ret = ocfs2_dentry_lock(dentry, 1);
 858         if (ret)
 859                 mlog_errno(ret);
 860         else
 861                 ocfs2_dentry_unlock(dentry, 1);
 862
 863         return ret;
 864 }
 865
 866 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
 867 {
 868         if (S_ISDIR(inode->i_mode)) {
 869                 if (inode->i_nlink == 2)
 870                         return 1;
 871                 return 0;
 872         }
 873
 874         if (inode->i_nlink == 1)
 875                 return 1;
 876         return 0;
 877 }
 878
 879 static int ocfs2_unlink(struct inode *dir,
 880                         struct dentry *dentry)
 881 {
 882         int status;
 883         int child_locked = 0;
 884         bool is_unlinkable = false;
 885         struct inode *inode = d_inode(dentry);
 886         struct inode *orphan_dir = NULL;
 887         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 888         u64 blkno;
 889         struct ocfs2_dinode *fe = NULL;
 890         struct buffer_head *fe_bh = NULL;
 891         struct buffer_head *parent_node_bh = NULL;
 892         handle_t *handle = NULL;
 893         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 894         struct ocfs2_dir_lookup_result lookup = { NULL, };
 895         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
 896
 897         trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
 898                            dentry->d_name.name,
 899                            (unsigned long long)OCFS2_I(dir)->ip_blkno,
 900                            (unsigned long long)OCFS2_I(inode)->ip_blkno);
 901
 902         status = dquot_initialize(dir);
 903         if (status) {
 904                 mlog_errno(status);
 905                 return status;
 906         }
 907
 908         BUG_ON(d_inode(dentry->d_parent) != dir);
 909
 910         if (inode == osb->root_inode)
 911                 return -EPERM;
 912
 913         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
 914                                          OI_LS_PARENT);
 915         if (status < 0) {
 916                 if (status != -ENOENT)
 917                         mlog_errno(status);
 918                 return status;
 919         }
 920
 921         status = ocfs2_find_files_on_disk(dentry->d_name.name,
 922                                           dentry->d_name.len, &blkno, dir,
 923                                           &lookup);
 924         if (status < 0) {
 925                 if (status != -ENOENT)
 926                         mlog_errno(status);
 927                 goto leave;
 928         }
 929
 930         if (OCFS2_I(inode)->ip_blkno != blkno) {
 931                 status = -ENOENT;
 932
 933                 trace_ocfs2_unlink_noent(
 934                                 (unsigned long long)OCFS2_I(inode)->ip_blkno,
 935                                 (unsigned long long)blkno,
 936                                 OCFS2_I(inode)->ip_flags);
 937                 goto leave;
 938         }
 939
 940         status = ocfs2_inode_lock(inode, &fe_bh, 1);
 941         if (status < 0) {
 942                 if (status != -ENOENT)
 943                         mlog_errno(status);
 944                 goto leave;
 945         }
 946         child_locked = 1;
 947
 948         if (S_ISDIR(inode->i_mode)) {
 949                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
 950                         status = -ENOTEMPTY;
 951                         goto leave;
 952                 }
 953         }
 954
 955         status = ocfs2_remote_dentry_delete(dentry);
 956         if (status < 0) {
 957                 /* This remote delete should succeed under all normal
 958                  * circumstances. */
 959                 mlog_errno(status);
 960                 goto leave;
 961         }
 962
 963         if (ocfs2_inode_is_unlinkable(inode)) {
 964                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
 965                                                   OCFS2_I(inode)->ip_blkno,
 966                                                   orphan_name, &orphan_insert,
 967                                                   false);
 968                 if (status < 0) {
 969                         mlog_errno(status);
 970                         goto leave;
 971                 }
 972                 is_unlinkable = true;
 973         }
 974
 975         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
 976         if (IS_ERR(handle)) {
 977                 status = PTR_ERR(handle);
 978                 handle = NULL;
 979                 mlog_errno(status);
 980                 goto leave;
 981         }
 982
 983         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 984                                          OCFS2_JOURNAL_ACCESS_WRITE);
 985         if (status < 0) {
 986                 mlog_errno(status);
 987                 goto leave;
 988         }
 989
 990         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 991
 992         /* delete the name from the parent dir */
 993         status = ocfs2_delete_entry(handle, dir, &lookup);
 994         if (status < 0) {
 995                 mlog_errno(status);
 996                 goto leave;
 997         }
 998
 999         if (S_ISDIR(inode->i_mode))
1000                 drop_nlink(inode);
1001         drop_nlink(inode);
1002         ocfs2_set_links_count(fe, inode->i_nlink);
1003         ocfs2_journal_dirty(handle, fe_bh);
1004
1005         dir->i_ctime = dir->i_mtime = current_time(dir);
1006         if (S_ISDIR(inode->i_mode))
1007                 drop_nlink(dir);
1008
1009         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1010         if (status < 0) {
1011                 mlog_errno(status);
1012                 if (S_ISDIR(inode->i_mode))
1013                         inc_nlink(dir);
1014                 goto leave;
1015         }
1016
1017         if (is_unlinkable) {
1018                 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1019                                 orphan_name, &orphan_insert, orphan_dir, false);
1020                 if (status < 0)
1021                         mlog_errno(status);
1022         }
1023
1024 leave:
1025         if (handle)
1026                 ocfs2_commit_trans(osb, handle);
1027
1028         if (orphan_dir) {
1029                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1030                 ocfs2_inode_unlock(orphan_dir, 1);
1031                 inode_unlock(orphan_dir);
1032                 iput(orphan_dir);
1033         }
1034
1035         if (child_locked)
1036                 ocfs2_inode_unlock(inode, 1);
1037
1038         ocfs2_inode_unlock(dir, 1);
1039
1040         brelse(fe_bh);
1041         brelse(parent_node_bh);
1042
1043         ocfs2_free_dir_lookup_result(&orphan_insert);
1044         ocfs2_free_dir_lookup_result(&lookup);
1045
1046         if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1047                 mlog_errno(status);
1048
1049         return status;
1050 }
1051
1052 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1053                 u64 src_inode_no, u64 dest_inode_no)
1054 {
1055         int ret = 0, i = 0;
1056         u64 parent_inode_no = 0;
1057         u64 child_inode_no = src_inode_no;
1058         struct inode *child_inode;
1059
1060 #define MAX_LOOKUP_TIMES 32
1061         while (1) {
1062                 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1063                 if (IS_ERR(child_inode)) {
1064                         ret = PTR_ERR(child_inode);
1065                         break;
1066                 }
1067
1068                 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1069                 if (ret < 0) {
1070                         iput(child_inode);
1071                         if (ret != -ENOENT)
1072                                 mlog_errno(ret);
1073                         break;
1074                 }
1075
1076                 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1077                                 &parent_inode_no);
1078                 ocfs2_inode_unlock(child_inode, 0);
1079                 iput(child_inode);
1080                 if (ret < 0) {
1081                         ret = -ENOENT;
1082                         break;
1083                 }
1084
1085                 if (parent_inode_no == dest_inode_no) {
1086                         ret = 1;
1087                         break;
1088                 }
1089
1090                 if (parent_inode_no == osb->root_inode->i_ino) {
1091                         ret = 0;
1092                         break;
1093                 }
1094
1095                 child_inode_no = parent_inode_no;
1096
1097                 if (++i >= MAX_LOOKUP_TIMES) {
1098                         mlog(ML_NOTICE, "max lookup times reached, filesystem "
1099                                         "may have nested directories, "
1100                                         "src inode: %llu, dest inode: %llu.\n",
1101                                         (unsigned long long)src_inode_no,
1102                                         (unsigned long long)dest_inode_no);
1103                         ret = 0;
1104                         break;
1105                 }
1106         }
1107
1108         return ret;
1109 }
1110
1111 /*
1112  * The only place this should be used is rename and link!
1113  * if they have the same id, then the 1st one is the only one locked.
1114  */
1115 static int ocfs2_double_lock(struct ocfs2_super *osb,
1116                              struct buffer_head **bh1,
1117                              struct inode *inode1,
1118                              struct buffer_head **bh2,
1119                              struct inode *inode2,
1120                              int rename)
1121 {
1122         int status;
1123         int inode1_is_ancestor, inode2_is_ancestor;
1124         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1125         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1126
1127         trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1128                                 (unsigned long long)oi2->ip_blkno);
1129
1130         if (*bh1)
1131                 *bh1 = NULL;
1132         if (*bh2)
1133                 *bh2 = NULL;
1134
1135         /* we always want to lock the one with the lower lockid first.
1136          * and if they are nested, we lock ancestor first */
1137         if (oi1->ip_blkno != oi2->ip_blkno) {
1138                 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1139                                 oi1->ip_blkno);
1140                 if (inode1_is_ancestor < 0) {
1141                         status = inode1_is_ancestor;
1142                         goto bail;
1143                 }
1144
1145                 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1146                                 oi2->ip_blkno);
1147                 if (inode2_is_ancestor < 0) {
1148                         status = inode2_is_ancestor;
1149                         goto bail;
1150                 }
1151
1152                 if ((inode1_is_ancestor == 1) ||
1153                                 (oi1->ip_blkno < oi2->ip_blkno &&
1154                                 inode2_is_ancestor == 0)) {
1155                         /* switch id1 and id2 around */
1156                         swap(bh2, bh1);
1157                         swap(inode2, inode1);
1158                 }
1159                 /* lock id2 */
1160                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1161                                 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1162                 if (status < 0) {
1163                         if (status != -ENOENT)
1164                                 mlog_errno(status);
1165                         goto bail;
1166                 }
1167         }
1168
1169         /* lock id1 */
1170         status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1171                         rename == 1 ?  OI_LS_RENAME2 : OI_LS_PARENT);
1172         if (status < 0) {
1173                 /*
1174                  * An error return must mean that no cluster locks
1175                  * were held on function exit.
1176                  */
1177                 if (oi1->ip_blkno != oi2->ip_blkno) {
1178                         ocfs2_inode_unlock(inode2, 1);
1179                         brelse(*bh2);
1180                         *bh2 = NULL;
1181                 }
1182
1183                 if (status != -ENOENT)
1184                         mlog_errno(status);
1185         }
1186
1187         trace_ocfs2_double_lock_end(
1188                         (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1189                         (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1190
1191 bail:
1192         if (status)
1193                 mlog_errno(status);
1194         return status;
1195 }
1196
1197 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1198 {
1199         ocfs2_inode_unlock(inode1, 1);
1200
1201         if (inode1 != inode2)
1202                 ocfs2_inode_unlock(inode2, 1);
1203 }
1204
1205 static int ocfs2_rename(struct inode *old_dir,
1206                         struct dentry *old_dentry,
1207                         struct inode *new_dir,
1208                         struct dentry *new_dentry,
1209                         unsigned int flags)
1210 {
1211         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1212         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1213         struct inode *old_inode = d_inode(old_dentry);
1214         struct inode *new_inode = d_inode(new_dentry);
1215         struct inode *orphan_dir = NULL;
1216         struct ocfs2_dinode *newfe = NULL;
1217         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1218         struct buffer_head *newfe_bh = NULL;
1219         struct buffer_head *old_inode_bh = NULL;
1220         struct ocfs2_super *osb = NULL;
1221         u64 newfe_blkno, old_de_ino;
1222         handle_t *handle = NULL;
1223         struct buffer_head *old_dir_bh = NULL;
1224         struct buffer_head *new_dir_bh = NULL;
1225         u32 old_dir_nlink = old_dir->i_nlink;
1226         struct ocfs2_dinode *old_di;
1227         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1228         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1229         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1230         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1231         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1232         bool should_add_orphan = false;
1233
1234         if (flags)
1235                 return -EINVAL;
1236
1237         /* At some point it might be nice to break this function up a
1238          * bit. */
1239
1240         trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1241                            old_dentry->d_name.len, old_dentry->d_name.name,
1242                            new_dentry->d_name.len, new_dentry->d_name.name);
1243
1244         status = dquot_initialize(old_dir);
1245         if (status) {
1246                 mlog_errno(status);
1247                 goto bail;
1248         }
1249         status = dquot_initialize(new_dir);
1250         if (status) {
1251                 mlog_errno(status);
1252                 goto bail;
1253         }
1254
1255         osb = OCFS2_SB(old_dir->i_sb);
1256
1257         if (new_inode) {
1258                 if (!igrab(new_inode))
1259                         BUG();
1260         }
1261
1262         /* Assume a directory hierarchy thusly:
1263          * a/b/c
1264          * a/d
1265          * a,b,c, and d are all directories.
1266          *
1267          * from cwd of 'a' on both nodes:
1268          * node1: mv b/c d
1269          * node2: mv d   b/c
1270          *
1271          * And that's why, just like the VFS, we need a file system
1272          * rename lock. */
1273         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1274                 status = ocfs2_rename_lock(osb);
1275                 if (status < 0) {
1276                         mlog_errno(status);
1277                         goto bail;
1278                 }
1279                 rename_lock = 1;
1280
1281                 /* here we cannot guarantee the inodes haven't just been
1282                  * changed, so check if they are nested again */
1283                 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1284                                 old_inode->i_ino);
1285                 if (status < 0) {
1286                         mlog_errno(status);
1287                         goto bail;
1288                 } else if (status == 1) {
1289                         status = -EPERM;
1290                         trace_ocfs2_rename_not_permitted(
1291                                         (unsigned long long)old_inode->i_ino,
1292                                         (unsigned long long)new_dir->i_ino);
1293                         goto bail;
1294                 }
1295         }
1296
1297         /* if old and new are the same, this'll just do one lock. */
1298         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1299                                    &new_dir_bh, new_dir, 1);
1300         if (status < 0) {
1301                 mlog_errno(status);
1302                 goto bail;
1303         }
1304         parents_locked = 1;
1305
1306         if (!new_dir->i_nlink) {
1307                 status = -EACCES;
1308                 goto bail;
1309         }
1310
1311         /* make sure both dirs have bhs
1312          * get an extra ref on old_dir_bh if old==new */
1313         if (!new_dir_bh) {
1314                 if (old_dir_bh) {
1315                         new_dir_bh = old_dir_bh;
1316                         get_bh(new_dir_bh);
1317                 } else {
1318                         mlog(ML_ERROR, "no old_dir_bh!\n");
1319                         status = -EIO;
1320                         goto bail;
1321                 }
1322         }
1323
1324         /*
1325          * Aside from allowing a meta data update, the locking here
1326          * also ensures that the downconvert thread on other nodes
1327          * won't have to concurrently downconvert the inode and the
1328          * dentry locks.
1329          */
1330         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1331                                          OI_LS_PARENT);
1332         if (status < 0) {
1333                 if (status != -ENOENT)
1334                         mlog_errno(status);
1335                 goto bail;
1336         }
1337         old_child_locked = 1;
1338
1339         status = ocfs2_remote_dentry_delete(old_dentry);
1340         if (status < 0) {
1341                 mlog_errno(status);
1342                 goto bail;
1343         }
1344
1345         if (S_ISDIR(old_inode->i_mode)) {
1346                 u64 old_inode_parent;
1347
1348                 update_dot_dot = 1;
1349                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1350                                                   old_inode,
1351                                                   &old_inode_dot_dot_res);
1352                 if (status) {
1353                         status = -EIO;
1354                         goto bail;
1355                 }
1356
1357                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1358                         status = -EIO;
1359                         goto bail;
1360                 }
1361
1362                 if (!new_inode && new_dir != old_dir &&
1363                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1364                         status = -EMLINK;
1365                         goto bail;
1366                 }
1367         }
1368
1369         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1370                                             old_dentry->d_name.len,
1371                                             &old_de_ino);
1372         if (status) {
1373                 status = -ENOENT;
1374                 goto bail;
1375         }
1376
1377         /*
1378          *  Check for inode number is _not_ due to possible IO errors.
1379          *  We might rmdir the source, keep it as pwd of some process
1380          *  and merrily kill the link to whatever was created under the
1381          *  same name. Goodbye sticky bit ;-<
1382          */
1383         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1384                 status = -ENOENT;
1385                 goto bail;
1386         }
1387
1388         /* check if the target already exists (in which case we need
1389          * to delete it */
1390         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1391                                           new_dentry->d_name.len,
1392                                           &newfe_blkno, new_dir,
1393                                           &target_lookup_res);
1394         /* The only error we allow here is -ENOENT because the new
1395          * file not existing is perfectly valid. */
1396         if ((status < 0) && (status != -ENOENT)) {
1397                 /* If we cannot find the file specified we should just */
1398                 /* return the error... */
1399                 mlog_errno(status);
1400                 goto bail;
1401         }
1402         if (status == 0)
1403                 target_exists = 1;
1404
1405         if (!target_exists && new_inode) {
1406                 /*
1407                  * Target was unlinked by another node while we were
1408                  * waiting to get to ocfs2_rename(). There isn't
1409                  * anything we can do here to help the situation, so
1410                  * bubble up the appropriate error.
1411                  */
1412                 status = -ENOENT;
1413                 goto bail;
1414         }
1415
1416         /* In case we need to overwrite an existing file, we blow it
1417          * away first */
1418         if (target_exists) {
1419                 /* VFS didn't think there existed an inode here, but
1420                  * someone else in the cluster must have raced our
1421                  * rename to create one. Today we error cleanly, in
1422                  * the future we should consider calling iget to build
1423                  * a new struct inode for this entry. */
1424                 if (!new_inode) {
1425                         status = -EACCES;
1426
1427                         trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1428                                                 new_dentry->d_name.name);
1429                         goto bail;
1430                 }
1431
1432                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1433                         status = -EACCES;
1434
1435                         trace_ocfs2_rename_disagree(
1436                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1437                              (unsigned long long)newfe_blkno,
1438                              OCFS2_I(new_inode)->ip_flags);
1439                         goto bail;
1440                 }
1441
1442                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1443                 if (status < 0) {
1444                         if (status != -ENOENT)
1445                                 mlog_errno(status);
1446                         goto bail;
1447                 }
1448                 new_child_locked = 1;
1449
1450                 status = ocfs2_remote_dentry_delete(new_dentry);
1451                 if (status < 0) {
1452                         mlog_errno(status);
1453                         goto bail;
1454                 }
1455
1456                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1457
1458                 trace_ocfs2_rename_over_existing(
1459                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1460                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1461
1462                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1463                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1464                                                 OCFS2_I(new_inode)->ip_blkno,
1465                                                 orphan_name, &orphan_insert,
1466                                                 false);
1467                         if (status < 0) {
1468                                 mlog_errno(status);
1469                                 goto bail;
1470                         }
1471                         should_add_orphan = true;
1472                 }
1473         } else {
1474                 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1475
1476                 status = ocfs2_check_dir_for_entry(new_dir,
1477                                                    new_dentry->d_name.name,
1478                                                    new_dentry->d_name.len);
1479                 if (status)
1480                         goto bail;
1481
1482                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1483                                                       new_dentry->d_name.name,
1484                                                       new_dentry->d_name.len,
1485                                                       &target_insert);
1486                 if (status < 0) {
1487                         mlog_errno(status);
1488                         goto bail;
1489                 }
1490         }
1491
1492         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1493         if (IS_ERR(handle)) {
1494                 status = PTR_ERR(handle);
1495                 handle = NULL;
1496                 mlog_errno(status);
1497                 goto bail;
1498         }
1499
1500         if (target_exists) {
1501                 if (S_ISDIR(new_inode->i_mode)) {
1502                         if (new_inode->i_nlink != 2 ||
1503                             !ocfs2_empty_dir(new_inode)) {
1504                                 status = -ENOTEMPTY;
1505                                 goto bail;
1506                         }
1507                 }
1508                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1509                                                  newfe_bh,
1510                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1511                 if (status < 0) {
1512                         mlog_errno(status);
1513                         goto bail;
1514                 }
1515
1516                 /* change the dirent to point to the correct inode */
1517                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1518                                             old_inode);
1519                 if (status < 0) {
1520                         mlog_errno(status);
1521                         goto bail;
1522                 }
1523                 new_dir->i_version++;
1524
1525                 if (S_ISDIR(new_inode->i_mode))
1526                         ocfs2_set_links_count(newfe, 0);
1527                 else
1528                         ocfs2_add_links_count(newfe, -1);
1529                 ocfs2_journal_dirty(handle, newfe_bh);
1530                 if (should_add_orphan) {
1531                         status = ocfs2_orphan_add(osb, handle, new_inode,
1532                                         newfe_bh, orphan_name,
1533                                         &orphan_insert, orphan_dir, false);
1534                         if (status < 0) {
1535                                 mlog_errno(status);
1536                                 goto bail;
1537                         }
1538                 }
1539         } else {
1540                 /* if the name was not found in new_dir, add it now */
1541                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1542                                          OCFS2_I(old_inode)->ip_blkno,
1543                                          new_dir_bh, &target_insert);
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                 ocfs2_commit_trans(osb, handle);
2035
2036         ocfs2_inode_unlock(dir, 1);
2037         if (did_block_signals)
2038                 ocfs2_unblock_signals(&oldset);
2039
2040         brelse(new_fe_bh);
2041         brelse(parent_fe_bh);
2042         kfree(si.value);
2043         ocfs2_free_dir_lookup_result(&lookup);
2044         if (inode_ac)
2045                 ocfs2_free_alloc_context(inode_ac);
2046         if (data_ac)
2047                 ocfs2_free_alloc_context(data_ac);
2048         if (xattr_ac)
2049                 ocfs2_free_alloc_context(xattr_ac);
2050         if ((status < 0) && inode) {
2051                 if (dl)
2052                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2053
2054                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2055                 clear_nlink(inode);
2056                 iput(inode);
2057         }
2058
2059         if (status)
2060                 mlog_errno(status);
2061
2062         return status;
2063 }
2064
2065 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2066 {
2067         int status, namelen;
2068
2069         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2070                            (long long)blkno);
2071         if (namelen <= 0) {
2072                 if (namelen)
2073                         status = namelen;
2074                 else
2075                         status = -EINVAL;
2076                 mlog_errno(status);
2077                 goto bail;
2078         }
2079         if (namelen != OCFS2_ORPHAN_NAMELEN) {
2080                 status = -EINVAL;
2081                 mlog_errno(status);
2082                 goto bail;
2083         }
2084
2085         trace_ocfs2_blkno_stringify(blkno, name, namelen);
2086
2087         status = 0;
2088 bail:
2089         if (status < 0)
2090                 mlog_errno(status);
2091         return status;
2092 }
2093
2094 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2095                                         struct inode **ret_orphan_dir,
2096                                         struct buffer_head **ret_orphan_dir_bh)
2097 {
2098         struct inode *orphan_dir_inode;
2099         struct buffer_head *orphan_dir_bh = NULL;
2100         int ret = 0;
2101
2102         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2103                                                        ORPHAN_DIR_SYSTEM_INODE,
2104                                                        osb->slot_num);
2105         if (!orphan_dir_inode) {
2106                 ret = -ENOENT;
2107                 mlog_errno(ret);
2108                 return ret;
2109         }
2110
2111         inode_lock(orphan_dir_inode);
2112
2113         ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2114         if (ret < 0) {
2115                 inode_unlock(orphan_dir_inode);
2116                 iput(orphan_dir_inode);
2117
2118                 mlog_errno(ret);
2119                 return ret;
2120         }
2121
2122         *ret_orphan_dir = orphan_dir_inode;
2123         *ret_orphan_dir_bh = orphan_dir_bh;
2124
2125         return 0;
2126 }
2127
2128 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2129                                       struct buffer_head *orphan_dir_bh,
2130                                       u64 blkno,
2131                                       char *name,
2132                                       struct ocfs2_dir_lookup_result *lookup,
2133                                       bool dio)
2134 {
2135         int ret;
2136         struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2137         int namelen = dio ?
2138                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2139                         OCFS2_ORPHAN_NAMELEN;
2140
2141         if (dio) {
2142                 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2143                                 OCFS2_DIO_ORPHAN_PREFIX);
2144                 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2145                         ret = -EINVAL;
2146                         mlog_errno(ret);
2147                         return ret;
2148                 }
2149
2150                 ret = ocfs2_blkno_stringify(blkno,
2151                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2152         } else
2153                 ret = ocfs2_blkno_stringify(blkno, name);
2154         if (ret < 0) {
2155                 mlog_errno(ret);
2156                 return ret;
2157         }
2158
2159         ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2160                                            orphan_dir_bh, name,
2161                                            namelen, lookup);
2162         if (ret < 0) {
2163                 mlog_errno(ret);
2164                 return ret;
2165         }
2166
2167         return 0;
2168 }
2169
2170 /**
2171  * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2172  * insertion of an orphan.
2173  * @osb: ocfs2 file system
2174  * @ret_orphan_dir: Orphan dir inode - returned locked!
2175  * @blkno: Actual block number of the inode to be inserted into orphan dir.
2176  * @lookup: dir lookup result, to be passed back into functions like
2177  *          ocfs2_orphan_add
2178  *
2179  * Returns zero on success and the ret_orphan_dir, name and lookup
2180  * fields will be populated.
2181  *
2182  * Returns non-zero on failure.
2183  */
2184 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2185                                     struct inode **ret_orphan_dir,
2186                                     u64 blkno,
2187                                     char *name,
2188                                     struct ocfs2_dir_lookup_result *lookup,
2189                                     bool dio)
2190 {
2191         struct inode *orphan_dir_inode = NULL;
2192         struct buffer_head *orphan_dir_bh = NULL;
2193         int ret = 0;
2194
2195         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2196                                            &orphan_dir_bh);
2197         if (ret < 0) {
2198                 mlog_errno(ret);
2199                 return ret;
2200         }
2201
2202         ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2203                                          blkno, name, lookup, dio);
2204         if (ret < 0) {
2205                 mlog_errno(ret);
2206                 goto out;
2207         }
2208
2209         *ret_orphan_dir = orphan_dir_inode;
2210
2211 out:
2212         brelse(orphan_dir_bh);
2213
2214         if (ret) {
2215                 ocfs2_inode_unlock(orphan_dir_inode, 1);
2216                 inode_unlock(orphan_dir_inode);
2217                 iput(orphan_dir_inode);
2218         }
2219
2220         if (ret)
2221                 mlog_errno(ret);
2222         return ret;
2223 }
2224
2225 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2226                             handle_t *handle,
2227                             struct inode *inode,
2228                             struct buffer_head *fe_bh,
2229                             char *name,
2230                             struct ocfs2_dir_lookup_result *lookup,
2231                             struct inode *orphan_dir_inode,
2232                             bool dio)
2233 {
2234         struct buffer_head *orphan_dir_bh = NULL;
2235         int status = 0;
2236         struct ocfs2_dinode *orphan_fe;
2237         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2238         int namelen = dio ?
2239                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2240                         OCFS2_ORPHAN_NAMELEN;
2241
2242         trace_ocfs2_orphan_add_begin(
2243                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2244
2245         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2246         if (status < 0) {
2247                 mlog_errno(status);
2248                 goto leave;
2249         }
2250
2251         status = ocfs2_journal_access_di(handle,
2252                                          INODE_CACHE(orphan_dir_inode),
2253                                          orphan_dir_bh,
2254                                          OCFS2_JOURNAL_ACCESS_WRITE);
2255         if (status < 0) {
2256                 mlog_errno(status);
2257                 goto leave;
2258         }
2259
2260         /*
2261          * We're going to journal the change of i_flags and i_orphaned_slot.
2262          * It's safe anyway, though some callers may duplicate the journaling.
2263          * Journaling within the func just make the logic look more
2264          * straightforward.
2265          */
2266         status = ocfs2_journal_access_di(handle,
2267                                          INODE_CACHE(inode),
2268                                          fe_bh,
2269                                          OCFS2_JOURNAL_ACCESS_WRITE);
2270         if (status < 0) {
2271                 mlog_errno(status);
2272                 goto leave;
2273         }
2274
2275         /* we're a cluster, and nlink can change on disk from
2276          * underneath us... */
2277         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2278         if (S_ISDIR(inode->i_mode))
2279                 ocfs2_add_links_count(orphan_fe, 1);
2280         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2281         ocfs2_journal_dirty(handle, orphan_dir_bh);
2282
2283         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2284                                    namelen, inode,
2285                                    OCFS2_I(inode)->ip_blkno,
2286                                    orphan_dir_bh, lookup);
2287         if (status < 0) {
2288                 mlog_errno(status);
2289                 goto rollback;
2290         }
2291
2292         if (dio) {
2293                 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2294                  * slot.
2295                  */
2296                 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2297                 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2298         } else {
2299                 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2300                 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2301
2302                 /* Record which orphan dir our inode now resides
2303                  * in. delete_inode will use this to determine which orphan
2304                  * dir to lock. */
2305                 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2306         }
2307
2308         ocfs2_journal_dirty(handle, fe_bh);
2309
2310         trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2311                                    osb->slot_num);
2312
2313 rollback:
2314         if (status < 0) {
2315                 if (S_ISDIR(inode->i_mode))
2316                         ocfs2_add_links_count(orphan_fe, -1);
2317                 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2318         }
2319
2320 leave:
2321         brelse(orphan_dir_bh);
2322
2323         return status;
2324 }
2325
2326 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2327 int ocfs2_orphan_del(struct ocfs2_super *osb,
2328                      handle_t *handle,
2329                      struct inode *orphan_dir_inode,
2330                      struct inode *inode,
2331                      struct buffer_head *orphan_dir_bh,
2332                      bool dio)
2333 {
2334         const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN;
2335         char name[namelen + 1];
2336         struct ocfs2_dinode *orphan_fe;
2337         int status = 0;
2338         struct ocfs2_dir_lookup_result lookup = { NULL, };
2339
2340         if (dio) {
2341                 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2342                                 OCFS2_DIO_ORPHAN_PREFIX);
2343                 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2344                         status = -EINVAL;
2345                         mlog_errno(status);
2346                         return status;
2347                 }
2348
2349                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2350                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2351         } else
2352                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2353         if (status < 0) {
2354                 mlog_errno(status);
2355                 goto leave;
2356         }
2357
2358         trace_ocfs2_orphan_del(
2359              (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2360              name, strlen(name));
2361
2362         status = ocfs2_journal_access_di(handle,
2363                                          INODE_CACHE(orphan_dir_inode),
2364                                          orphan_dir_bh,
2365                                          OCFS2_JOURNAL_ACCESS_WRITE);
2366         if (status < 0) {
2367                 mlog_errno(status);
2368                 goto leave;
2369         }
2370
2371         /* find it's spot in the orphan directory */
2372         status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2373                                   &lookup);
2374         if (status) {
2375                 mlog_errno(status);
2376                 goto leave;
2377         }
2378
2379         /* remove it from the orphan directory */
2380         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2381         if (status < 0) {
2382                 mlog_errno(status);
2383                 goto leave;
2384         }
2385
2386         /* do the i_nlink dance! :) */
2387         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2388         if (S_ISDIR(inode->i_mode))
2389                 ocfs2_add_links_count(orphan_fe, -1);
2390         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2391         ocfs2_journal_dirty(handle, orphan_dir_bh);
2392
2393 leave:
2394         ocfs2_free_dir_lookup_result(&lookup);
2395
2396         if (status)
2397                 mlog_errno(status);
2398         return status;
2399 }
2400
2401 /**
2402  * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2403  * allocated file. This is different from the typical 'add to orphan dir'
2404  * operation in that the inode does not yet exist. This is a problem because
2405  * the orphan dir stringifies the inode block number to come up with it's
2406  * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2407  * problem. This function works around it by calling deeper into the orphan
2408  * and suballoc code than other callers. Use this only by necessity.
2409  * @dir: The directory which this inode will ultimately wind up under - not the
2410  * orphan dir!
2411  * @dir_bh: buffer_head the @dir inode block
2412  * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2413  * with the string to be used for orphan dirent. Pass back to the orphan dir
2414  * code.
2415  * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2416  * dir code.
2417  * @ret_di_blkno: block number where the new inode will be allocated.
2418  * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2419  * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2420  *
2421  * Returns zero on success and the ret_orphan_dir, name and lookup
2422  * fields will be populated.
2423  *
2424  * Returns non-zero on failure.
2425  */
2426 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2427                                         struct buffer_head *dir_bh,
2428                                         char *orphan_name,
2429                                         struct inode **ret_orphan_dir,
2430                                         u64 *ret_di_blkno,
2431                                         struct ocfs2_dir_lookup_result *orphan_insert,
2432                                         struct ocfs2_alloc_context **ret_inode_ac)
2433 {
2434         int ret;
2435         u64 di_blkno;
2436         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2437         struct inode *orphan_dir = NULL;
2438         struct buffer_head *orphan_dir_bh = NULL;
2439         struct ocfs2_alloc_context *inode_ac = NULL;
2440
2441         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2442         if (ret < 0) {
2443                 mlog_errno(ret);
2444                 return ret;
2445         }
2446
2447         /* reserve an inode spot */
2448         ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2449         if (ret < 0) {
2450                 if (ret != -ENOSPC)
2451                         mlog_errno(ret);
2452                 goto out;
2453         }
2454
2455         ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2456                                        &di_blkno);
2457         if (ret) {
2458                 mlog_errno(ret);
2459                 goto out;
2460         }
2461
2462         ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2463                                          di_blkno, orphan_name, orphan_insert,
2464                                          false);
2465         if (ret < 0) {
2466                 mlog_errno(ret);
2467                 goto out;
2468         }
2469
2470 out:
2471         if (ret == 0) {
2472                 *ret_orphan_dir = orphan_dir;
2473                 *ret_di_blkno = di_blkno;
2474                 *ret_inode_ac = inode_ac;
2475                 /*
2476                  * orphan_name and orphan_insert are already up to
2477                  * date via prepare_orphan_dir
2478                  */
2479         } else {
2480                 /* Unroll reserve_new_inode* */
2481                 if (inode_ac)
2482                         ocfs2_free_alloc_context(inode_ac);
2483
2484                 /* Unroll orphan dir locking */
2485                 inode_unlock(orphan_dir);
2486                 ocfs2_inode_unlock(orphan_dir, 1);
2487                 iput(orphan_dir);
2488         }
2489
2490         brelse(orphan_dir_bh);
2491
2492         return ret;
2493 }
2494
2495 int ocfs2_create_inode_in_orphan(struct inode *dir,
2496                                  int mode,
2497                                  struct inode **new_inode)
2498 {
2499         int status, did_quota_inode = 0;
2500         struct inode *inode = NULL;
2501         struct inode *orphan_dir = NULL;
2502         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2503         struct ocfs2_dinode *di = NULL;
2504         handle_t *handle = NULL;
2505         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2506         struct buffer_head *parent_di_bh = NULL;
2507         struct buffer_head *new_di_bh = NULL;
2508         struct ocfs2_alloc_context *inode_ac = NULL;
2509         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2510         u64 uninitialized_var(di_blkno), suballoc_loc;
2511         u16 suballoc_bit;
2512
2513         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2514         if (status < 0) {
2515                 if (status != -ENOENT)
2516                         mlog_errno(status);
2517                 return status;
2518         }
2519
2520         status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2521                                               orphan_name, &orphan_dir,
2522                                               &di_blkno, &orphan_insert, &inode_ac);
2523         if (status < 0) {
2524                 if (status != -ENOSPC)
2525                         mlog_errno(status);
2526                 goto leave;
2527         }
2528
2529         inode = ocfs2_get_init_inode(dir, mode);
2530         if (IS_ERR(inode)) {
2531                 status = PTR_ERR(inode);
2532                 inode = NULL;
2533                 mlog_errno(status);
2534                 goto leave;
2535         }
2536
2537         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2538         if (IS_ERR(handle)) {
2539                 status = PTR_ERR(handle);
2540                 handle = NULL;
2541                 mlog_errno(status);
2542                 goto leave;
2543         }
2544
2545         status = dquot_alloc_inode(inode);
2546         if (status)
2547                 goto leave;
2548         did_quota_inode = 1;
2549
2550         status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2551                                               &suballoc_loc,
2552                                               &suballoc_bit, di_blkno);
2553         if (status < 0) {
2554                 mlog_errno(status);
2555                 goto leave;
2556         }
2557
2558         clear_nlink(inode);
2559         /* do the real work now. */
2560         status = __ocfs2_mknod_locked(dir, inode,
2561                                       0, &new_di_bh, parent_di_bh, handle,
2562                                       inode_ac, di_blkno, suballoc_loc,
2563                                       suballoc_bit);
2564         if (status < 0) {
2565                 mlog_errno(status);
2566                 goto leave;
2567         }
2568
2569         di = (struct ocfs2_dinode *)new_di_bh->b_data;
2570         status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2571                                   &orphan_insert, orphan_dir, false);
2572         if (status < 0) {
2573                 mlog_errno(status);
2574                 goto leave;
2575         }
2576
2577         /* get open lock so that only nodes can't remove it from orphan dir. */
2578         status = ocfs2_open_lock(inode);
2579         if (status < 0)
2580                 mlog_errno(status);
2581
2582         insert_inode_hash(inode);
2583 leave:
2584         if (status < 0 && did_quota_inode)
2585                 dquot_free_inode(inode);
2586         if (handle)
2587                 ocfs2_commit_trans(osb, handle);
2588
2589         if (orphan_dir) {
2590                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2591                 ocfs2_inode_unlock(orphan_dir, 1);
2592                 inode_unlock(orphan_dir);
2593                 iput(orphan_dir);
2594         }
2595
2596         if ((status < 0) && inode) {
2597                 clear_nlink(inode);
2598                 iput(inode);
2599         }
2600
2601         if (inode_ac)
2602                 ocfs2_free_alloc_context(inode_ac);
2603
2604         brelse(new_di_bh);
2605
2606         if (!status)
2607                 *new_inode = inode;
2608
2609         ocfs2_free_dir_lookup_result(&orphan_insert);
2610
2611         ocfs2_inode_unlock(dir, 1);
2612         brelse(parent_di_bh);
2613         return status;
2614 }
2615
2616 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2617         struct inode *inode)
2618 {
2619         char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2620         struct inode *orphan_dir_inode = NULL;
2621         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2622         struct buffer_head *di_bh = NULL;
2623         int status = 0;
2624         handle_t *handle = NULL;
2625         struct ocfs2_dinode *di = NULL;
2626
2627         status = ocfs2_inode_lock(inode, &di_bh, 1);
2628         if (status < 0) {
2629                 mlog_errno(status);
2630                 goto bail;
2631         }
2632
2633         di = (struct ocfs2_dinode *) di_bh->b_data;
2634         /*
2635          * Another append dio crashed?
2636          * If so, manually recover it first.
2637          */
2638         if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2639                 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2640                 if (status < 0) {
2641                         if (status != -ENOSPC)
2642                                 mlog_errno(status);
2643                         goto bail_unlock_inode;
2644                 }
2645
2646                 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2647                 if (status < 0) {
2648                         mlog_errno(status);
2649                         goto bail_unlock_inode;
2650                 }
2651         }
2652
2653         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2654                         OCFS2_I(inode)->ip_blkno,
2655                         orphan_name,
2656                         &orphan_insert,
2657                         true);
2658         if (status < 0) {
2659                 mlog_errno(status);
2660                 goto bail_unlock_inode;
2661         }
2662
2663         handle = ocfs2_start_trans(osb,
2664                         OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2665         if (IS_ERR(handle)) {
2666                 status = PTR_ERR(handle);
2667                 goto bail_unlock_orphan;
2668         }
2669
2670         status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2671                         &orphan_insert, orphan_dir_inode, true);
2672         if (status)
2673                 mlog_errno(status);
2674
2675         ocfs2_commit_trans(osb, handle);
2676
2677 bail_unlock_orphan:
2678         ocfs2_inode_unlock(orphan_dir_inode, 1);
2679         inode_unlock(orphan_dir_inode);
2680         iput(orphan_dir_inode);
2681
2682         ocfs2_free_dir_lookup_result(&orphan_insert);
2683
2684 bail_unlock_inode:
2685         ocfs2_inode_unlock(inode, 1);
2686         brelse(di_bh);
2687
2688 bail:
2689         return status;
2690 }
2691
2692 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2693                 struct inode *inode, struct buffer_head *di_bh,
2694                 int update_isize, loff_t end)
2695 {
2696         struct inode *orphan_dir_inode = NULL;
2697         struct buffer_head *orphan_dir_bh = NULL;
2698         struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2699         handle_t *handle = NULL;
2700         int status = 0;
2701
2702         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2703                         ORPHAN_DIR_SYSTEM_INODE,
2704                         le16_to_cpu(di->i_dio_orphaned_slot));
2705         if (!orphan_dir_inode) {
2706                 status = -ENOENT;
2707                 mlog_errno(status);
2708                 goto bail;
2709         }
2710
2711         inode_lock(orphan_dir_inode);
2712         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2713         if (status < 0) {
2714                 inode_unlock(orphan_dir_inode);
2715                 iput(orphan_dir_inode);
2716                 mlog_errno(status);
2717                 goto bail;
2718         }
2719
2720         handle = ocfs2_start_trans(osb,
2721                         OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2722         if (IS_ERR(handle)) {
2723                 status = PTR_ERR(handle);
2724                 goto bail_unlock_orphan;
2725         }
2726
2727         BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2728
2729         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2730                                 inode, orphan_dir_bh, true);
2731         if (status < 0) {
2732                 mlog_errno(status);
2733                 goto bail_commit;
2734         }
2735
2736         status = ocfs2_journal_access_di(handle,
2737                         INODE_CACHE(inode),
2738                         di_bh,
2739                         OCFS2_JOURNAL_ACCESS_WRITE);
2740         if (status < 0) {
2741                 mlog_errno(status);
2742                 goto bail_commit;
2743         }
2744
2745         di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2746         di->i_dio_orphaned_slot = 0;
2747
2748         if (update_isize) {
2749                 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2750                 if (status)
2751                         mlog_errno(status);
2752         } else
2753                 ocfs2_journal_dirty(handle, di_bh);
2754
2755 bail_commit:
2756         ocfs2_commit_trans(osb, handle);
2757
2758 bail_unlock_orphan:
2759         ocfs2_inode_unlock(orphan_dir_inode, 1);
2760         inode_unlock(orphan_dir_inode);
2761         brelse(orphan_dir_bh);
2762         iput(orphan_dir_inode);
2763
2764 bail:
2765         return status;
2766 }
2767
2768 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2769                                    struct inode *inode,
2770                                    struct dentry *dentry)
2771 {
2772         int status = 0;
2773         struct buffer_head *parent_di_bh = NULL;
2774         handle_t *handle = NULL;
2775         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2776         struct ocfs2_dinode *dir_di, *di;
2777         struct inode *orphan_dir_inode = NULL;
2778         struct buffer_head *orphan_dir_bh = NULL;
2779         struct buffer_head *di_bh = NULL;
2780         struct ocfs2_dir_lookup_result lookup = { NULL, };
2781
2782         trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2783                                 dentry->d_name.len, dentry->d_name.name,
2784                                 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2785                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2786
2787         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2788         if (status < 0) {
2789                 if (status != -ENOENT)
2790                         mlog_errno(status);
2791                 return status;
2792         }
2793
2794         dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2795         if (!dir_di->i_links_count) {
2796                 /* can't make a file in a deleted directory. */
2797                 status = -ENOENT;
2798                 goto leave;
2799         }
2800
2801         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2802                                            dentry->d_name.len);
2803         if (status)
2804                 goto leave;
2805
2806         /* get a spot inside the dir. */
2807         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2808                                               dentry->d_name.name,
2809                                               dentry->d_name.len, &lookup);
2810         if (status < 0) {
2811                 mlog_errno(status);
2812                 goto leave;
2813         }
2814
2815         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2816                                                        ORPHAN_DIR_SYSTEM_INODE,
2817                                                        osb->slot_num);
2818         if (!orphan_dir_inode) {
2819                 status = -ENOENT;
2820                 mlog_errno(status);
2821                 goto leave;
2822         }
2823
2824         inode_lock(orphan_dir_inode);
2825
2826         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2827         if (status < 0) {
2828                 mlog_errno(status);
2829                 inode_unlock(orphan_dir_inode);
2830                 iput(orphan_dir_inode);
2831                 goto leave;
2832         }
2833
2834         status = ocfs2_read_inode_block(inode, &di_bh);
2835         if (status < 0) {
2836                 mlog_errno(status);
2837                 goto orphan_unlock;
2838         }
2839
2840         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2841         if (IS_ERR(handle)) {
2842                 status = PTR_ERR(handle);
2843                 handle = NULL;
2844                 mlog_errno(status);
2845                 goto orphan_unlock;
2846         }
2847
2848         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2849                                          di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2850         if (status < 0) {
2851                 mlog_errno(status);
2852                 goto out_commit;
2853         }
2854
2855         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2856                                   orphan_dir_bh, false);
2857         if (status < 0) {
2858                 mlog_errno(status);
2859                 goto out_commit;
2860         }
2861
2862         di = (struct ocfs2_dinode *)di_bh->b_data;
2863         di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2864         di->i_orphaned_slot = 0;
2865         set_nlink(inode, 1);
2866         ocfs2_set_links_count(di, inode->i_nlink);
2867         ocfs2_update_inode_fsync_trans(handle, inode, 1);
2868         ocfs2_journal_dirty(handle, di_bh);
2869
2870         status = ocfs2_add_entry(handle, dentry, inode,
2871                                  OCFS2_I(inode)->ip_blkno, parent_di_bh,
2872                                  &lookup);
2873         if (status < 0) {
2874                 mlog_errno(status);
2875                 goto out_commit;
2876         }
2877
2878         status = ocfs2_dentry_attach_lock(dentry, inode,
2879                                           OCFS2_I(dir)->ip_blkno);
2880         if (status) {
2881                 mlog_errno(status);
2882                 goto out_commit;
2883         }
2884
2885         d_instantiate(dentry, inode);
2886         status = 0;
2887 out_commit:
2888         ocfs2_commit_trans(osb, handle);
2889 orphan_unlock:
2890         ocfs2_inode_unlock(orphan_dir_inode, 1);
2891         inode_unlock(orphan_dir_inode);
2892         iput(orphan_dir_inode);
2893 leave:
2894
2895         ocfs2_inode_unlock(dir, 1);
2896
2897         brelse(di_bh);
2898         brelse(parent_di_bh);
2899         brelse(orphan_dir_bh);
2900
2901         ocfs2_free_dir_lookup_result(&lookup);
2902
2903         if (status)
2904                 mlog_errno(status);
2905
2906         return status;
2907 }
2908
2909 const struct inode_operations ocfs2_dir_iops = {
2910         .create         = ocfs2_create,
2911         .lookup         = ocfs2_lookup,
2912         .link           = ocfs2_link,
2913         .unlink         = ocfs2_unlink,
2914         .rmdir          = ocfs2_unlink,
2915         .symlink        = ocfs2_symlink,
2916         .mkdir          = ocfs2_mkdir,
2917         .mknod          = ocfs2_mknod,
2918         .rename         = ocfs2_rename,
2919         .setattr        = ocfs2_setattr,
2920         .getattr        = ocfs2_getattr,
2921         .permission     = ocfs2_permission,
2922         .listxattr      = ocfs2_listxattr,
2923         .fiemap         = ocfs2_fiemap,
2924         .get_acl        = ocfs2_iop_get_acl,
2925         .set_acl        = ocfs2_iop_set_acl,
2926 };