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
 520         *new_fe_bh = NULL;
 521
 522         /* populate as many fields early on as possible - many of
 523          * these are used by the support functions here and in
 524          * callers. */
 525         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
 526         OCFS2_I(inode)->ip_blkno = fe_blkno;
 527         spin_lock(&osb->osb_lock);
 528         inode->i_generation = osb->s_next_generation++;
 529         spin_unlock(&osb->osb_lock);
 530
 531         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
 532         if (!*new_fe_bh) {
 533                 status = -ENOMEM;
 534                 mlog_errno(status);
 535                 goto leave;
 536         }
 537         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
 538
 539         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
 540                                          *new_fe_bh,
 541                                          OCFS2_JOURNAL_ACCESS_CREATE);
 542         if (status < 0) {
 543                 mlog_errno(status);
 544                 goto leave;
 545         }
 546
 547         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
 548         memset(fe, 0, osb->sb->s_blocksize);
 549
 550         fe->i_generation = cpu_to_le32(inode->i_generation);
 551         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
 552         fe->i_blkno = cpu_to_le64(fe_blkno);
 553         fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
 554         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
 555         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
 556         fe->i_uid = cpu_to_le32(i_uid_read(inode));
 557         fe->i_gid = cpu_to_le32(i_gid_read(inode));
 558         fe->i_mode = cpu_to_le16(inode->i_mode);
 559         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 560                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
 561
 562         ocfs2_set_links_count(fe, inode->i_nlink);
 563
 564         fe->i_last_eb_blk = 0;
 565         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 566         fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
 567         fe->i_atime = fe->i_ctime = fe->i_mtime =
 568                 cpu_to_le64(CURRENT_TIME.tv_sec);
 569         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
 570                 cpu_to_le32(CURRENT_TIME.tv_nsec);
 571         fe->i_dtime = 0;
 572
 573         /*
 574          * If supported, directories start with inline data. If inline
 575          * isn't supported, but indexing is, we start them as indexed.
 576          */
 577         feat = le16_to_cpu(fe->i_dyn_features);
 578         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
 579                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
 580
 581                 fe->id2.i_data.id_count = cpu_to_le16(
 582                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
 583         } else {
 584                 fel = &fe->id2.i_list;
 585                 fel->l_tree_depth = 0;
 586                 fel->l_next_free_rec = 0;
 587                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
 588         }
 589
 590         ocfs2_journal_dirty(handle, *new_fe_bh);
 591
 592         ocfs2_populate_inode(inode, fe, 1);
 593         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
 594         if (!ocfs2_mount_local(osb)) {
 595                 status = ocfs2_create_new_inode_locks(inode);
 596                 if (status < 0)
 597                         mlog_errno(status);
 598         }
 599
 600         oi->i_sync_tid = handle->h_transaction->t_tid;
 601         oi->i_datasync_tid = handle->h_transaction->t_tid;
 602
 603 leave:
 604         if (status < 0) {
 605                 if (*new_fe_bh) {
 606                         brelse(*new_fe_bh);
 607                         *new_fe_bh = NULL;
 608                 }
 609         }
 610
 611         if (status)
 612                 mlog_errno(status);
 613         return status;
 614 }
 615
 616 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 617                               struct inode *dir,
 618                               struct inode *inode,
 619                               dev_t dev,
 620                               struct buffer_head **new_fe_bh,
 621                               struct buffer_head *parent_fe_bh,
 622                               handle_t *handle,
 623                               struct ocfs2_alloc_context *inode_ac)
 624 {
 625         int status = 0;
 626         u64 suballoc_loc, fe_blkno = 0;
 627         u16 suballoc_bit;
 628
 629         *new_fe_bh = NULL;
 630
 631         status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
 632                                        inode_ac, &suballoc_loc,
 633                                        &suballoc_bit, &fe_blkno);
 634         if (status < 0) {
 635                 mlog_errno(status);
 636                 return status;
 637         }
 638
 639         status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
 640                                     parent_fe_bh, handle, inode_ac,
 641                                     fe_blkno, suballoc_loc, suballoc_bit);
 642         if (status < 0) {
 643                 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit);
 644                 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode,
 645                                 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1);
 646                 if (tmp)
 647                         mlog_errno(tmp);
 648         }
 649
 650         return status;
 651 }
 652
 653 static int ocfs2_mkdir(struct inode *dir,
 654                        struct dentry *dentry,
 655                        umode_t mode)
 656 {
 657         int ret;
 658
 659         trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 660                           OCFS2_I(dir)->ip_blkno, mode);
 661         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
 662         if (ret)
 663                 mlog_errno(ret);
 664
 665         return ret;
 666 }
 667
 668 static int ocfs2_create(struct inode *dir,
 669                         struct dentry *dentry,
 670                         umode_t mode,
 671                         bool excl)
 672 {
 673         int ret;
 674
 675         trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 676                            (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
 677         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
 678         if (ret)
 679                 mlog_errno(ret);
 680
 681         return ret;
 682 }
 683
 684 static int ocfs2_link(struct dentry *old_dentry,
 685                       struct inode *dir,
 686                       struct dentry *dentry)
 687 {
 688         handle_t *handle;
 689         struct inode *inode = d_inode(old_dentry);
 690         struct inode *old_dir = d_inode(old_dentry->d_parent);
 691         int err;
 692         struct buffer_head *fe_bh = NULL;
 693         struct buffer_head *old_dir_bh = NULL;
 694         struct buffer_head *parent_fe_bh = NULL;
 695         struct ocfs2_dinode *fe = NULL;
 696         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 697         struct ocfs2_dir_lookup_result lookup = { NULL, };
 698         sigset_t oldset;
 699         u64 old_de_ino;
 700
 701         trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
 702                          old_dentry->d_name.len, old_dentry->d_name.name,
 703                          dentry->d_name.len, dentry->d_name.name);
 704
 705         if (S_ISDIR(inode->i_mode))
 706                 return -EPERM;
 707
 708         err = dquot_initialize(dir);
 709         if (err) {
 710                 mlog_errno(err);
 711                 return err;
 712         }
 713
 714         err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
 715                         &parent_fe_bh, dir, 0);
 716         if (err < 0) {
 717                 if (err != -ENOENT)
 718                         mlog_errno(err);
 719                 return err;
 720         }
 721
 722         /* make sure both dirs have bhs
 723          * get an extra ref on old_dir_bh if old==new */
 724         if (!parent_fe_bh) {
 725                 if (old_dir_bh) {
 726                         parent_fe_bh = old_dir_bh;
 727                         get_bh(parent_fe_bh);
 728                 } else {
 729                         mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
 730                         err = -EIO;
 731                         goto out;
 732                 }
 733         }
 734
 735         if (!dir->i_nlink) {
 736                 err = -ENOENT;
 737                 goto out;
 738         }
 739
 740         err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
 741                         old_dentry->d_name.len, &old_de_ino);
 742         if (err) {
 743                 err = -ENOENT;
 744                 goto out;
 745         }
 746
 747         /*
 748          * Check whether another node removed the source inode while we
 749          * were in the vfs.
 750          */
 751         if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
 752                 err = -ENOENT;
 753                 goto out;
 754         }
 755
 756         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 757                                         dentry->d_name.len);
 758         if (err)
 759                 goto out;
 760
 761         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 762                                            dentry->d_name.name,
 763                                            dentry->d_name.len, &lookup);
 764         if (err < 0) {
 765                 mlog_errno(err);
 766                 goto out;
 767         }
 768
 769         err = ocfs2_inode_lock(inode, &fe_bh, 1);
 770         if (err < 0) {
 771                 if (err != -ENOENT)
 772                         mlog_errno(err);
 773                 goto out;
 774         }
 775
 776         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 777         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
 778                 err = -EMLINK;
 779                 goto out_unlock_inode;
 780         }
 781
 782         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
 783         if (IS_ERR(handle)) {
 784                 err = PTR_ERR(handle);
 785                 handle = NULL;
 786                 mlog_errno(err);
 787                 goto out_unlock_inode;
 788         }
 789
 790         /* Starting to change things, restart is no longer possible. */
 791         ocfs2_block_signals(&oldset);
 792
 793         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 794                                       OCFS2_JOURNAL_ACCESS_WRITE);
 795         if (err < 0) {
 796                 mlog_errno(err);
 797                 goto out_commit;
 798         }
 799
 800         inc_nlink(inode);
 801         inode->i_ctime = CURRENT_TIME;
 802         ocfs2_set_links_count(fe, inode->i_nlink);
 803         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 804         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 805         ocfs2_journal_dirty(handle, fe_bh);
 806
 807         err = ocfs2_add_entry(handle, dentry, inode,
 808                               OCFS2_I(inode)->ip_blkno,
 809                               parent_fe_bh, &lookup);
 810         if (err) {
 811                 ocfs2_add_links_count(fe, -1);
 812                 drop_nlink(inode);
 813                 mlog_errno(err);
 814                 goto out_commit;
 815         }
 816
 817         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
 818         if (err) {
 819                 mlog_errno(err);
 820                 goto out_commit;
 821         }
 822
 823         ihold(inode);
 824         d_instantiate(dentry, inode);
 825
 826 out_commit:
 827         ocfs2_commit_trans(osb, handle);
 828         ocfs2_unblock_signals(&oldset);
 829 out_unlock_inode:
 830         ocfs2_inode_unlock(inode, 1);
 831
 832 out:
 833         ocfs2_double_unlock(old_dir, dir);
 834
 835         brelse(fe_bh);
 836         brelse(parent_fe_bh);
 837         brelse(old_dir_bh);
 838
 839         ocfs2_free_dir_lookup_result(&lookup);
 840
 841         if (err)
 842                 mlog_errno(err);
 843
 844         return err;
 845 }
 846
 847 /*
 848  * Takes and drops an exclusive lock on the given dentry. This will
 849  * force other nodes to drop it.
 850  */
 851 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 852 {
 853         int ret;
 854
 855         ret = ocfs2_dentry_lock(dentry, 1);
 856         if (ret)
 857                 mlog_errno(ret);
 858         else
 859                 ocfs2_dentry_unlock(dentry, 1);
 860
 861         return ret;
 862 }
 863
 864 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
 865 {
 866         if (S_ISDIR(inode->i_mode)) {
 867                 if (inode->i_nlink == 2)
 868                         return 1;
 869                 return 0;
 870         }
 871
 872         if (inode->i_nlink == 1)
 873                 return 1;
 874         return 0;
 875 }
 876
 877 static int ocfs2_unlink(struct inode *dir,
 878                         struct dentry *dentry)
 879 {
 880         int status;
 881         int child_locked = 0;
 882         bool is_unlinkable = false;
 883         struct inode *inode = d_inode(dentry);
 884         struct inode *orphan_dir = NULL;
 885         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 886         u64 blkno;
 887         struct ocfs2_dinode *fe = NULL;
 888         struct buffer_head *fe_bh = NULL;
 889         struct buffer_head *parent_node_bh = NULL;
 890         handle_t *handle = NULL;
 891         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 892         struct ocfs2_dir_lookup_result lookup = { NULL, };
 893         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
 894
 895         trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
 896                            dentry->d_name.name,
 897                            (unsigned long long)OCFS2_I(dir)->ip_blkno,
 898                            (unsigned long long)OCFS2_I(inode)->ip_blkno);
 899
 900         status = dquot_initialize(dir);
 901         if (status) {
 902                 mlog_errno(status);
 903                 return status;
 904         }
 905
 906         BUG_ON(d_inode(dentry->d_parent) != dir);
 907
 908         if (inode == osb->root_inode)
 909                 return -EPERM;
 910
 911         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
 912                                          OI_LS_PARENT);
 913         if (status < 0) {
 914                 if (status != -ENOENT)
 915                         mlog_errno(status);
 916                 return status;
 917         }
 918
 919         status = ocfs2_find_files_on_disk(dentry->d_name.name,
 920                                           dentry->d_name.len, &blkno, dir,
 921                                           &lookup);
 922         if (status < 0) {
 923                 if (status != -ENOENT)
 924                         mlog_errno(status);
 925                 goto leave;
 926         }
 927
 928         if (OCFS2_I(inode)->ip_blkno != blkno) {
 929                 status = -ENOENT;
 930
 931                 trace_ocfs2_unlink_noent(
 932                                 (unsigned long long)OCFS2_I(inode)->ip_blkno,
 933                                 (unsigned long long)blkno,
 934                                 OCFS2_I(inode)->ip_flags);
 935                 goto leave;
 936         }
 937
 938         status = ocfs2_inode_lock(inode, &fe_bh, 1);
 939         if (status < 0) {
 940                 if (status != -ENOENT)
 941                         mlog_errno(status);
 942                 goto leave;
 943         }
 944         child_locked = 1;
 945
 946         if (S_ISDIR(inode->i_mode)) {
 947                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
 948                         status = -ENOTEMPTY;
 949                         goto leave;
 950                 }
 951         }
 952
 953         status = ocfs2_remote_dentry_delete(dentry);
 954         if (status < 0) {
 955                 /* This remote delete should succeed under all normal
 956                  * circumstances. */
 957                 mlog_errno(status);
 958                 goto leave;
 959         }
 960
 961         if (ocfs2_inode_is_unlinkable(inode)) {
 962                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
 963                                                   OCFS2_I(inode)->ip_blkno,
 964                                                   orphan_name, &orphan_insert,
 965                                                   false);
 966                 if (status < 0) {
 967                         mlog_errno(status);
 968                         goto leave;
 969                 }
 970                 is_unlinkable = true;
 971         }
 972
 973         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
 974         if (IS_ERR(handle)) {
 975                 status = PTR_ERR(handle);
 976                 handle = NULL;
 977                 mlog_errno(status);
 978                 goto leave;
 979         }
 980
 981         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 982                                          OCFS2_JOURNAL_ACCESS_WRITE);
 983         if (status < 0) {
 984                 mlog_errno(status);
 985                 goto leave;
 986         }
 987
 988         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 989
 990         /* delete the name from the parent dir */
 991         status = ocfs2_delete_entry(handle, dir, &lookup);
 992         if (status < 0) {
 993                 mlog_errno(status);
 994                 goto leave;
 995         }
 996
 997         if (S_ISDIR(inode->i_mode))
 998                 drop_nlink(inode);
 999         drop_nlink(inode);
1000         ocfs2_set_links_count(fe, inode->i_nlink);
1001         ocfs2_journal_dirty(handle, fe_bh);
1002
1003         dir->i_ctime = dir->i_mtime = CURRENT_TIME;
1004         if (S_ISDIR(inode->i_mode))
1005                 drop_nlink(dir);
1006
1007         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1008         if (status < 0) {
1009                 mlog_errno(status);
1010                 if (S_ISDIR(inode->i_mode))
1011                         inc_nlink(dir);
1012                 goto leave;
1013         }
1014
1015         if (is_unlinkable) {
1016                 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1017                                 orphan_name, &orphan_insert, orphan_dir, false);
1018                 if (status < 0)
1019                         mlog_errno(status);
1020         }
1021
1022 leave:
1023         if (handle)
1024                 ocfs2_commit_trans(osb, handle);
1025
1026         if (orphan_dir) {
1027                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1028                 ocfs2_inode_unlock(orphan_dir, 1);
1029                 inode_unlock(orphan_dir);
1030                 iput(orphan_dir);
1031         }
1032
1033         if (child_locked)
1034                 ocfs2_inode_unlock(inode, 1);
1035
1036         ocfs2_inode_unlock(dir, 1);
1037
1038         brelse(fe_bh);
1039         brelse(parent_node_bh);
1040
1041         ocfs2_free_dir_lookup_result(&orphan_insert);
1042         ocfs2_free_dir_lookup_result(&lookup);
1043
1044         if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1045                 mlog_errno(status);
1046
1047         return status;
1048 }
1049
1050 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1051                 u64 src_inode_no, u64 dest_inode_no)
1052 {
1053         int ret = 0, i = 0;
1054         u64 parent_inode_no = 0;
1055         u64 child_inode_no = src_inode_no;
1056         struct inode *child_inode;
1057
1058 #define MAX_LOOKUP_TIMES 32
1059         while (1) {
1060                 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1061                 if (IS_ERR(child_inode)) {
1062                         ret = PTR_ERR(child_inode);
1063                         break;
1064                 }
1065
1066                 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1067                 if (ret < 0) {
1068                         iput(child_inode);
1069                         if (ret != -ENOENT)
1070                                 mlog_errno(ret);
1071                         break;
1072                 }
1073
1074                 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1075                                 &parent_inode_no);
1076                 ocfs2_inode_unlock(child_inode, 0);
1077                 iput(child_inode);
1078                 if (ret < 0) {
1079                         ret = -ENOENT;
1080                         break;
1081                 }
1082
1083                 if (parent_inode_no == dest_inode_no) {
1084                         ret = 1;
1085                         break;
1086                 }
1087
1088                 if (parent_inode_no == osb->root_inode->i_ino) {
1089                         ret = 0;
1090                         break;
1091                 }
1092
1093                 child_inode_no = parent_inode_no;
1094
1095                 if (++i >= MAX_LOOKUP_TIMES) {
1096                         mlog(ML_NOTICE, "max lookup times reached, filesystem "
1097                                         "may have nested directories, "
1098                                         "src inode: %llu, dest inode: %llu.\n",
1099                                         (unsigned long long)src_inode_no,
1100                                         (unsigned long long)dest_inode_no);
1101                         ret = 0;
1102                         break;
1103                 }
1104         }
1105
1106         return ret;
1107 }
1108
1109 /*
1110  * The only place this should be used is rename and link!
1111  * if they have the same id, then the 1st one is the only one locked.
1112  */
1113 static int ocfs2_double_lock(struct ocfs2_super *osb,
1114                              struct buffer_head **bh1,
1115                              struct inode *inode1,
1116                              struct buffer_head **bh2,
1117                              struct inode *inode2,
1118                              int rename)
1119 {
1120         int status;
1121         int inode1_is_ancestor, inode2_is_ancestor;
1122         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1123         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1124
1125         trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1126                                 (unsigned long long)oi2->ip_blkno);
1127
1128         if (*bh1)
1129                 *bh1 = NULL;
1130         if (*bh2)
1131                 *bh2 = NULL;
1132
1133         /* we always want to lock the one with the lower lockid first.
1134          * and if they are nested, we lock ancestor first */
1135         if (oi1->ip_blkno != oi2->ip_blkno) {
1136                 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1137                                 oi1->ip_blkno);
1138                 if (inode1_is_ancestor < 0) {
1139                         status = inode1_is_ancestor;
1140                         goto bail;
1141                 }
1142
1143                 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1144                                 oi2->ip_blkno);
1145                 if (inode2_is_ancestor < 0) {
1146                         status = inode2_is_ancestor;
1147                         goto bail;
1148                 }
1149
1150                 if ((inode1_is_ancestor == 1) ||
1151                                 (oi1->ip_blkno < oi2->ip_blkno &&
1152                                 inode2_is_ancestor == 0)) {
1153                         /* switch id1 and id2 around */
1154                         swap(bh2, bh1);
1155                         swap(inode2, inode1);
1156                 }
1157                 /* lock id2 */
1158                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1159                                 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1160                 if (status < 0) {
1161                         if (status != -ENOENT)
1162                                 mlog_errno(status);
1163                         goto bail;
1164                 }
1165         }
1166
1167         /* lock id1 */
1168         status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1169                         rename == 1 ?  OI_LS_RENAME2 : OI_LS_PARENT);
1170         if (status < 0) {
1171                 /*
1172                  * An error return must mean that no cluster locks
1173                  * were held on function exit.
1174                  */
1175                 if (oi1->ip_blkno != oi2->ip_blkno) {
1176                         ocfs2_inode_unlock(inode2, 1);
1177                         brelse(*bh2);
1178                         *bh2 = NULL;
1179                 }
1180
1181                 if (status != -ENOENT)
1182                         mlog_errno(status);
1183         }
1184
1185         trace_ocfs2_double_lock_end(
1186                         (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1187                         (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1188
1189 bail:
1190         if (status)
1191                 mlog_errno(status);
1192         return status;
1193 }
1194
1195 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1196 {
1197         ocfs2_inode_unlock(inode1, 1);
1198
1199         if (inode1 != inode2)
1200                 ocfs2_inode_unlock(inode2, 1);
1201 }
1202
1203 static int ocfs2_rename(struct inode *old_dir,
1204                         struct dentry *old_dentry,
1205                         struct inode *new_dir,
1206                         struct dentry *new_dentry)
1207 {
1208         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1209         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1210         struct inode *old_inode = d_inode(old_dentry);
1211         struct inode *new_inode = d_inode(new_dentry);
1212         struct inode *orphan_dir = NULL;
1213         struct ocfs2_dinode *newfe = NULL;
1214         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1215         struct buffer_head *newfe_bh = NULL;
1216         struct buffer_head *old_inode_bh = NULL;
1217         struct ocfs2_super *osb = NULL;
1218         u64 newfe_blkno, old_de_ino;
1219         handle_t *handle = NULL;
1220         struct buffer_head *old_dir_bh = NULL;
1221         struct buffer_head *new_dir_bh = NULL;
1222         u32 old_dir_nlink = old_dir->i_nlink;
1223         struct ocfs2_dinode *old_di;
1224         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1225         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1226         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1227         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1228         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1229         bool should_add_orphan = false;
1230
1231         /* At some point it might be nice to break this function up a
1232          * bit. */
1233
1234         trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1235                            old_dentry->d_name.len, old_dentry->d_name.name,
1236                            new_dentry->d_name.len, new_dentry->d_name.name);
1237
1238         status = dquot_initialize(old_dir);
1239         if (status) {
1240                 mlog_errno(status);
1241                 goto bail;
1242         }
1243         status = dquot_initialize(new_dir);
1244         if (status) {
1245                 mlog_errno(status);
1246                 goto bail;
1247         }
1248
1249         osb = OCFS2_SB(old_dir->i_sb);
1250
1251         if (new_inode) {
1252                 if (!igrab(new_inode))
1253                         BUG();
1254         }
1255
1256         /* Assume a directory hierarchy thusly:
1257          * a/b/c
1258          * a/d
1259          * a,b,c, and d are all directories.
1260          *
1261          * from cwd of 'a' on both nodes:
1262          * node1: mv b/c d
1263          * node2: mv d   b/c
1264          *
1265          * And that's why, just like the VFS, we need a file system
1266          * rename lock. */
1267         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1268                 status = ocfs2_rename_lock(osb);
1269                 if (status < 0) {
1270                         mlog_errno(status);
1271                         goto bail;
1272                 }
1273                 rename_lock = 1;
1274
1275                 /* here we cannot guarantee the inodes haven't just been
1276                  * changed, so check if they are nested again */
1277                 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1278                                 old_inode->i_ino);
1279                 if (status < 0) {
1280                         mlog_errno(status);
1281                         goto bail;
1282                 } else if (status == 1) {
1283                         status = -EPERM;
1284                         trace_ocfs2_rename_not_permitted(
1285                                         (unsigned long long)old_inode->i_ino,
1286                                         (unsigned long long)new_dir->i_ino);
1287                         goto bail;
1288                 }
1289         }
1290
1291         /* if old and new are the same, this'll just do one lock. */
1292         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1293                                    &new_dir_bh, new_dir, 1);
1294         if (status < 0) {
1295                 mlog_errno(status);
1296                 goto bail;
1297         }
1298         parents_locked = 1;
1299
1300         if (!new_dir->i_nlink) {
1301                 status = -EACCES;
1302                 goto bail;
1303         }
1304
1305         /* make sure both dirs have bhs
1306          * get an extra ref on old_dir_bh if old==new */
1307         if (!new_dir_bh) {
1308                 if (old_dir_bh) {
1309                         new_dir_bh = old_dir_bh;
1310                         get_bh(new_dir_bh);
1311                 } else {
1312                         mlog(ML_ERROR, "no old_dir_bh!\n");
1313                         status = -EIO;
1314                         goto bail;
1315                 }
1316         }
1317
1318         /*
1319          * Aside from allowing a meta data update, the locking here
1320          * also ensures that the downconvert thread on other nodes
1321          * won't have to concurrently downconvert the inode and the
1322          * dentry locks.
1323          */
1324         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1325                                          OI_LS_PARENT);
1326         if (status < 0) {
1327                 if (status != -ENOENT)
1328                         mlog_errno(status);
1329                 goto bail;
1330         }
1331         old_child_locked = 1;
1332
1333         status = ocfs2_remote_dentry_delete(old_dentry);
1334         if (status < 0) {
1335                 mlog_errno(status);
1336                 goto bail;
1337         }
1338
1339         if (S_ISDIR(old_inode->i_mode)) {
1340                 u64 old_inode_parent;
1341
1342                 update_dot_dot = 1;
1343                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1344                                                   old_inode,
1345                                                   &old_inode_dot_dot_res);
1346                 if (status) {
1347                         status = -EIO;
1348                         goto bail;
1349                 }
1350
1351                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1352                         status = -EIO;
1353                         goto bail;
1354                 }
1355
1356                 if (!new_inode && new_dir != old_dir &&
1357                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1358                         status = -EMLINK;
1359                         goto bail;
1360                 }
1361         }
1362
1363         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1364                                             old_dentry->d_name.len,
1365                                             &old_de_ino);
1366         if (status) {
1367                 status = -ENOENT;
1368                 goto bail;
1369         }
1370
1371         /*
1372          *  Check for inode number is _not_ due to possible IO errors.
1373          *  We might rmdir the source, keep it as pwd of some process
1374          *  and merrily kill the link to whatever was created under the
1375          *  same name. Goodbye sticky bit ;-<
1376          */
1377         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1378                 status = -ENOENT;
1379                 goto bail;
1380         }
1381
1382         /* check if the target already exists (in which case we need
1383          * to delete it */
1384         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1385                                           new_dentry->d_name.len,
1386                                           &newfe_blkno, new_dir,
1387                                           &target_lookup_res);
1388         /* The only error we allow here is -ENOENT because the new
1389          * file not existing is perfectly valid. */
1390         if ((status < 0) && (status != -ENOENT)) {
1391                 /* If we cannot find the file specified we should just */
1392                 /* return the error... */
1393                 mlog_errno(status);
1394                 goto bail;
1395         }
1396         if (status == 0)
1397                 target_exists = 1;
1398
1399         if (!target_exists && new_inode) {
1400                 /*
1401                  * Target was unlinked by another node while we were
1402                  * waiting to get to ocfs2_rename(). There isn't
1403                  * anything we can do here to help the situation, so
1404                  * bubble up the appropriate error.
1405                  */
1406                 status = -ENOENT;
1407                 goto bail;
1408         }
1409
1410         /* In case we need to overwrite an existing file, we blow it
1411          * away first */
1412         if (target_exists) {
1413                 /* VFS didn't think there existed an inode here, but
1414                  * someone else in the cluster must have raced our
1415                  * rename to create one. Today we error cleanly, in
1416                  * the future we should consider calling iget to build
1417                  * a new struct inode for this entry. */
1418                 if (!new_inode) {
1419                         status = -EACCES;
1420
1421                         trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1422                                                 new_dentry->d_name.name);
1423                         goto bail;
1424                 }
1425
1426                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1427                         status = -EACCES;
1428
1429                         trace_ocfs2_rename_disagree(
1430                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1431                              (unsigned long long)newfe_blkno,
1432                              OCFS2_I(new_inode)->ip_flags);
1433                         goto bail;
1434                 }
1435
1436                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1437                 if (status < 0) {
1438                         if (status != -ENOENT)
1439                                 mlog_errno(status);
1440                         goto bail;
1441                 }
1442                 new_child_locked = 1;
1443
1444                 status = ocfs2_remote_dentry_delete(new_dentry);
1445                 if (status < 0) {
1446                         mlog_errno(status);
1447                         goto bail;
1448                 }
1449
1450                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1451
1452                 trace_ocfs2_rename_over_existing(
1453                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1454                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1455
1456                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1457                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1458                                                 OCFS2_I(new_inode)->ip_blkno,
1459                                                 orphan_name, &orphan_insert,
1460                                                 false);
1461                         if (status < 0) {
1462                                 mlog_errno(status);
1463                                 goto bail;
1464                         }
1465                         should_add_orphan = true;
1466                 }
1467         } else {
1468                 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1469
1470                 status = ocfs2_check_dir_for_entry(new_dir,
1471                                                    new_dentry->d_name.name,
1472                                                    new_dentry->d_name.len);
1473                 if (status)
1474                         goto bail;
1475
1476                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1477                                                       new_dentry->d_name.name,
1478                                                       new_dentry->d_name.len,
1479                                                       &target_insert);
1480                 if (status < 0) {
1481                         mlog_errno(status);
1482                         goto bail;
1483                 }
1484         }
1485
1486         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1487         if (IS_ERR(handle)) {
1488                 status = PTR_ERR(handle);
1489                 handle = NULL;
1490                 mlog_errno(status);
1491                 goto bail;
1492         }
1493
1494         if (target_exists) {
1495                 if (S_ISDIR(new_inode->i_mode)) {
1496                         if (new_inode->i_nlink != 2 ||
1497                             !ocfs2_empty_dir(new_inode)) {
1498                                 status = -ENOTEMPTY;
1499                                 goto bail;
1500                         }
1501                 }
1502                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1503                                                  newfe_bh,
1504                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1505                 if (status < 0) {
1506                         mlog_errno(status);
1507                         goto bail;
1508                 }
1509
1510                 /* change the dirent to point to the correct inode */
1511                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1512                                             old_inode);
1513                 if (status < 0) {
1514                         mlog_errno(status);
1515                         goto bail;
1516                 }
1517                 new_dir->i_version++;
1518
1519                 if (S_ISDIR(new_inode->i_mode))
1520                         ocfs2_set_links_count(newfe, 0);
1521                 else
1522                         ocfs2_add_links_count(newfe, -1);
1523                 ocfs2_journal_dirty(handle, newfe_bh);
1524                 if (should_add_orphan) {
1525                         status = ocfs2_orphan_add(osb, handle, new_inode,
1526                                         newfe_bh, orphan_name,
1527                                         &orphan_insert, orphan_dir, false);
1528                         if (status < 0) {
1529                                 mlog_errno(status);
1530                                 goto bail;
1531                         }
1532                 }
1533         } else {
1534                 /* if the name was not found in new_dir, add it now */
1535                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1536                                          OCFS2_I(old_inode)->ip_blkno,
1537                                          new_dir_bh, &target_insert);
1538         }
1539
1540         old_inode->i_ctime = CURRENT_TIME;
1541         mark_inode_dirty(old_inode);
1542
1543         status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1544                                          old_inode_bh,
1545                                          OCFS2_JOURNAL_ACCESS_WRITE);
1546         if (status >= 0) {
1547                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1548
1549                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1550                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1551                 ocfs2_journal_dirty(handle, old_inode_bh);
1552         } else
1553                 mlog_errno(status);
1554
1555         /*
1556          * Now that the name has been added to new_dir, remove the old name.
1557          *
1558          * We don't keep any directory entry context around until now
1559          * because the insert might have changed the type of directory
1560          * we're dealing with.
1561          */
1562         status = ocfs2_find_entry(old_dentry->d_name.name,
1563                                   old_dentry->d_name.len, old_dir,
1564                                   &old_entry_lookup);
1565         if (status) {
1566                 if (!is_journal_aborted(osb->journal->j_journal)) {
1567                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1568                                         "is not deleted.",
1569                                         new_dentry->d_name.len, new_dentry->d_name.name,
1570                                         old_dentry->d_name.len, old_dentry->d_name.name);
1571                 }
1572                 goto bail;
1573         }
1574
1575         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1576         if (status < 0) {
1577                 mlog_errno(status);
1578                 if (!is_journal_aborted(osb->journal->j_journal)) {
1579                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1580                                         "is not deleted.",
1581                                         new_dentry->d_name.len, new_dentry->d_name.name,
1582                                         old_dentry->d_name.len, old_dentry->d_name.name);
1583                 }
1584                 goto bail;
1585         }
1586
1587         if (new_inode) {
1588                 drop_nlink(new_inode);
1589                 new_inode->i_ctime = CURRENT_TIME;
1590         }
1591         old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1592
1593         if (update_dot_dot) {
1594                 status = ocfs2_update_entry(old_inode, handle,
1595                                             &old_inode_dot_dot_res, new_dir);
1596                 drop_nlink(old_dir);
1597                 if (new_inode) {
1598                         drop_nlink(new_inode);
1599                 } else {
1600                         inc_nlink(new_dir);
1601                         mark_inode_dirty(new_dir);
1602                 }
1603         }
1604         mark_inode_dirty(old_dir);
1605         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1606         if (new_inode) {
1607                 mark_inode_dirty(new_inode);
1608                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1609         }
1610
1611         if (old_dir != new_dir) {
1612                 /* Keep the same times on both directories.*/
1613                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1614
1615                 /*
1616                  * This will also pick up the i_nlink change from the
1617                  * block above.
1618                  */
1619                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1620         }
1621
1622         if (old_dir_nlink != old_dir->i_nlink) {
1623                 if (!old_dir_bh) {
1624                         mlog(ML_ERROR, "need to change nlink for old dir "
1625                              "%llu from %d to %d but bh is NULL!\n",
1626                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1627                              (int)old_dir_nlink, old_dir->i_nlink);
1628                 } else {
1629                         struct ocfs2_dinode *fe;
1630                         status = ocfs2_journal_access_di(handle,
1631                                                          INODE_CACHE(old_dir),
1632                                                          old_dir_bh,
1633                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1634                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1635                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1636                         ocfs2_journal_dirty(handle, old_dir_bh);
1637                 }
1638         }
1639         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1640         status = 0;
1641 bail:
1642         if (handle)
1643                 ocfs2_commit_trans(osb, handle);
1644
1645         if (orphan_dir) {
1646                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1647                 ocfs2_inode_unlock(orphan_dir, 1);
1648                 inode_unlock(orphan_dir);
1649                 iput(orphan_dir);
1650         }
1651
1652         if (new_child_locked)
1653                 ocfs2_inode_unlock(new_inode, 1);
1654
1655         if (old_child_locked)
1656                 ocfs2_inode_unlock(old_inode, 1);
1657
1658         if (parents_locked)
1659                 ocfs2_double_unlock(old_dir, new_dir);
1660
1661         if (rename_lock)
1662                 ocfs2_rename_unlock(osb);
1663
1664         if (new_inode)
1665                 sync_mapping_buffers(old_inode->i_mapping);
1666
1667         iput(new_inode);
1668
1669         ocfs2_free_dir_lookup_result(&target_lookup_res);
1670         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1671         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1672         ocfs2_free_dir_lookup_result(&orphan_insert);
1673         ocfs2_free_dir_lookup_result(&target_insert);
1674
1675         brelse(newfe_bh);
1676         brelse(old_inode_bh);
1677         brelse(old_dir_bh);
1678         brelse(new_dir_bh);
1679
1680         if (status)
1681                 mlog_errno(status);
1682
1683         return status;
1684 }
1685
1686 /*
1687  * we expect i_size = strlen(symname). Copy symname into the file
1688  * data, including the null terminator.
1689  */
1690 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1691                                      handle_t *handle,
1692                                      struct inode *inode,
1693                                      const char *symname)
1694 {
1695         struct buffer_head **bhs = NULL;
1696         const char *c;
1697         struct super_block *sb = osb->sb;
1698         u64 p_blkno, p_blocks;
1699         int virtual, blocks, status, i, bytes_left;
1700
1701         bytes_left = i_size_read(inode) + 1;
1702         /* we can't trust i_blocks because we're actually going to
1703          * write i_size + 1 bytes. */
1704         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1705
1706         trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1707                                         i_size_read(inode), blocks);
1708
1709         /* Sanity check -- make sure we're going to fit. */
1710         if (bytes_left >
1711             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1712                 status = -EIO;
1713                 mlog_errno(status);
1714                 goto bail;
1715         }
1716
1717         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1718         if (!bhs) {
1719                 status = -ENOMEM;
1720                 mlog_errno(status);
1721                 goto bail;
1722         }
1723
1724         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1725                                              NULL);
1726         if (status < 0) {
1727                 mlog_errno(status);
1728                 goto bail;
1729         }
1730
1731         /* links can never be larger than one cluster so we know this
1732          * is all going to be contiguous, but do a sanity check
1733          * anyway. */
1734         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1735                 status = -EIO;
1736                 mlog_errno(status);
1737                 goto bail;
1738         }
1739
1740         virtual = 0;
1741         while(bytes_left > 0) {
1742                 c = &symname[virtual * sb->s_blocksize];
1743
1744                 bhs[virtual] = sb_getblk(sb, p_blkno);
1745                 if (!bhs[virtual]) {
1746                         status = -ENOMEM;
1747                         mlog_errno(status);
1748                         goto bail;
1749                 }
1750                 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1751                                               bhs[virtual]);
1752
1753                 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1754                                               bhs[virtual],
1755                                               OCFS2_JOURNAL_ACCESS_CREATE);
1756                 if (status < 0) {
1757                         mlog_errno(status);
1758                         goto bail;
1759                 }
1760
1761                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1762
1763                 memcpy(bhs[virtual]->b_data, c,
1764                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1765                        bytes_left);
1766
1767                 ocfs2_journal_dirty(handle, bhs[virtual]);
1768
1769                 virtual++;
1770                 p_blkno++;
1771                 bytes_left -= sb->s_blocksize;
1772         }
1773
1774         status = 0;
1775 bail:
1776
1777         if (bhs) {
1778                 for(i = 0; i < blocks; i++)
1779                         brelse(bhs[i]);
1780                 kfree(bhs);
1781         }
1782
1783         if (status)
1784                 mlog_errno(status);
1785         return status;
1786 }
1787
1788 static int ocfs2_symlink(struct inode *dir,
1789                          struct dentry *dentry,
1790                          const char *symname)
1791 {
1792         int status, l, credits;
1793         u64 newsize;
1794         struct ocfs2_super *osb = NULL;
1795         struct inode *inode = NULL;
1796         struct super_block *sb;
1797         struct buffer_head *new_fe_bh = NULL;
1798         struct buffer_head *parent_fe_bh = NULL;
1799         struct ocfs2_dinode *fe = NULL;
1800         struct ocfs2_dinode *dirfe;
1801         handle_t *handle = NULL;
1802         struct ocfs2_alloc_context *inode_ac = NULL;
1803         struct ocfs2_alloc_context *data_ac = NULL;
1804         struct ocfs2_alloc_context *xattr_ac = NULL;
1805         int want_clusters = 0;
1806         int xattr_credits = 0;
1807         struct ocfs2_security_xattr_info si = {
1808                 .enable = 1,
1809         };
1810         int did_quota = 0, did_quota_inode = 0;
1811         struct ocfs2_dir_lookup_result lookup = { NULL, };
1812         sigset_t oldset;
1813         int did_block_signals = 0;
1814         struct ocfs2_dentry_lock *dl = NULL;
1815
1816         trace_ocfs2_symlink_begin(dir, dentry, symname,
1817                                   dentry->d_name.len, dentry->d_name.name);
1818
1819         status = dquot_initialize(dir);
1820         if (status) {
1821                 mlog_errno(status);
1822                 goto bail;
1823         }
1824
1825         sb = dir->i_sb;
1826         osb = OCFS2_SB(sb);
1827
1828         l = strlen(symname) + 1;
1829
1830         credits = ocfs2_calc_symlink_credits(sb);
1831
1832         /* lock the parent directory */
1833         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1834         if (status < 0) {
1835                 if (status != -ENOENT)
1836                         mlog_errno(status);
1837                 return status;
1838         }
1839
1840         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1841         if (!ocfs2_read_links_count(dirfe)) {
1842                 /* can't make a file in a deleted directory. */
1843                 status = -ENOENT;
1844                 goto bail;
1845         }
1846
1847         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1848                                            dentry->d_name.len);
1849         if (status)
1850                 goto bail;
1851
1852         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1853                                               dentry->d_name.name,
1854                                               dentry->d_name.len, &lookup);
1855         if (status < 0) {
1856                 mlog_errno(status);
1857                 goto bail;
1858         }
1859
1860         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1861         if (status < 0) {
1862                 if (status != -ENOSPC)
1863                         mlog_errno(status);
1864                 goto bail;
1865         }
1866
1867         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1868         if (IS_ERR(inode)) {
1869                 status = PTR_ERR(inode);
1870                 inode = NULL;
1871                 mlog_errno(status);
1872                 goto bail;
1873         }
1874
1875         /* get security xattr */
1876         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1877         if (status) {
1878                 if (status == -EOPNOTSUPP)
1879                         si.enable = 0;
1880                 else {
1881                         mlog_errno(status);
1882                         goto bail;
1883                 }
1884         }
1885
1886         /* calculate meta data/clusters for setting security xattr */
1887         if (si.enable) {
1888                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1889                                                   &xattr_credits, &xattr_ac);
1890                 if (status < 0) {
1891                         mlog_errno(status);
1892                         goto bail;
1893                 }
1894         }
1895
1896         /* don't reserve bitmap space for fast symlinks. */
1897         if (l > ocfs2_fast_symlink_chars(sb))
1898                 want_clusters += 1;
1899
1900         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1901         if (status < 0) {
1902                 if (status != -ENOSPC)
1903                         mlog_errno(status);
1904                 goto bail;
1905         }
1906
1907         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1908         if (IS_ERR(handle)) {
1909                 status = PTR_ERR(handle);
1910                 handle = NULL;
1911                 mlog_errno(status);
1912                 goto bail;
1913         }
1914
1915         /* Starting to change things, restart is no longer possible. */
1916         ocfs2_block_signals(&oldset);
1917         did_block_signals = 1;
1918
1919         status = dquot_alloc_inode(inode);
1920         if (status)
1921                 goto bail;
1922         did_quota_inode = 1;
1923
1924         trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1925                                    dentry->d_name.name,
1926                                    (unsigned long long)OCFS2_I(dir)->ip_blkno,
1927                                    inode->i_mode);
1928
1929         status = ocfs2_mknod_locked(osb, dir, inode,
1930                                     0, &new_fe_bh, parent_fe_bh, handle,
1931                                     inode_ac);
1932         if (status < 0) {
1933                 mlog_errno(status);
1934                 goto bail;
1935         }
1936
1937         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1938         inode->i_rdev = 0;
1939         newsize = l - 1;
1940         inode->i_op = &ocfs2_symlink_inode_operations;
1941         inode_nohighmem(inode);
1942         if (l > ocfs2_fast_symlink_chars(sb)) {
1943                 u32 offset = 0;
1944
1945                 status = dquot_alloc_space_nodirty(inode,
1946                     ocfs2_clusters_to_bytes(osb->sb, 1));
1947                 if (status)
1948                         goto bail;
1949                 did_quota = 1;
1950                 inode->i_mapping->a_ops = &ocfs2_aops;
1951                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1952                                               new_fe_bh,
1953                                               handle, data_ac, NULL,
1954                                               NULL);
1955                 if (status < 0) {
1956                         if (status != -ENOSPC && status != -EINTR) {
1957                                 mlog(ML_ERROR,
1958                                      "Failed to extend file to %llu\n",
1959                                      (unsigned long long)newsize);
1960                                 mlog_errno(status);
1961                                 status = -ENOSPC;
1962                         }
1963                         goto bail;
1964                 }
1965                 i_size_write(inode, newsize);
1966                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1967         } else {
1968                 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1969                 memcpy((char *) fe->id2.i_symlink, symname, l);
1970                 i_size_write(inode, newsize);
1971                 inode->i_blocks = 0;
1972         }
1973
1974         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1975         if (status < 0) {
1976                 mlog_errno(status);
1977                 goto bail;
1978         }
1979
1980         if (!ocfs2_inode_is_fast_symlink(inode)) {
1981                 status = ocfs2_create_symlink_data(osb, handle, inode,
1982                                                    symname);
1983                 if (status < 0) {
1984                         mlog_errno(status);
1985                         goto bail;
1986                 }
1987         }
1988
1989         if (si.enable) {
1990                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1991                                                  xattr_ac, data_ac);
1992                 if (status < 0) {
1993                         mlog_errno(status);
1994                         goto bail;
1995                 }
1996         }
1997
1998         /*
1999          * Do this before adding the entry to the directory. We add
2000          * also set d_op after success so that ->d_iput() will cleanup
2001          * the dentry lock even if ocfs2_add_entry() fails below.
2002          */
2003         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2004         if (status) {
2005                 mlog_errno(status);
2006                 goto bail;
2007         }
2008
2009         dl = dentry->d_fsdata;
2010
2011         status = ocfs2_add_entry(handle, dentry, inode,
2012                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
2013                                  &lookup);
2014         if (status < 0) {
2015                 mlog_errno(status);
2016                 goto bail;
2017         }
2018
2019         insert_inode_hash(inode);
2020         d_instantiate(dentry, inode);
2021 bail:
2022         if (status < 0 && did_quota)
2023                 dquot_free_space_nodirty(inode,
2024                                         ocfs2_clusters_to_bytes(osb->sb, 1));
2025         if (status < 0 && did_quota_inode)
2026                 dquot_free_inode(inode);
2027         if (handle)
2028                 ocfs2_commit_trans(osb, handle);
2029
2030         ocfs2_inode_unlock(dir, 1);
2031         if (did_block_signals)
2032                 ocfs2_unblock_signals(&oldset);
2033
2034         brelse(new_fe_bh);
2035         brelse(parent_fe_bh);
2036         kfree(si.value);
2037         ocfs2_free_dir_lookup_result(&lookup);
2038         if (inode_ac)
2039                 ocfs2_free_alloc_context(inode_ac);
2040         if (data_ac)
2041                 ocfs2_free_alloc_context(data_ac);
2042         if (xattr_ac)
2043                 ocfs2_free_alloc_context(xattr_ac);
2044         if ((status < 0) && inode) {
2045                 if (dl)
2046                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2047
2048                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2049                 clear_nlink(inode);
2050                 iput(inode);
2051         }
2052
2053         if (status)
2054                 mlog_errno(status);
2055
2056         return status;
2057 }
2058
2059 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2060 {
2061         int status, namelen;
2062
2063         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2064                            (long long)blkno);
2065         if (namelen <= 0) {
2066                 if (namelen)
2067                         status = namelen;
2068                 else
2069                         status = -EINVAL;
2070                 mlog_errno(status);
2071                 goto bail;
2072         }
2073         if (namelen != OCFS2_ORPHAN_NAMELEN) {
2074                 status = -EINVAL;
2075                 mlog_errno(status);
2076                 goto bail;
2077         }
2078
2079         trace_ocfs2_blkno_stringify(blkno, name, namelen);
2080
2081         status = 0;
2082 bail:
2083         if (status < 0)
2084                 mlog_errno(status);
2085         return status;
2086 }
2087
2088 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2089                                         struct inode **ret_orphan_dir,
2090                                         struct buffer_head **ret_orphan_dir_bh)
2091 {
2092         struct inode *orphan_dir_inode;
2093         struct buffer_head *orphan_dir_bh = NULL;
2094         int ret = 0;
2095
2096         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2097                                                        ORPHAN_DIR_SYSTEM_INODE,
2098                                                        osb->slot_num);
2099         if (!orphan_dir_inode) {
2100                 ret = -ENOENT;
2101                 mlog_errno(ret);
2102                 return ret;
2103         }
2104
2105         inode_lock(orphan_dir_inode);
2106
2107         ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2108         if (ret < 0) {
2109                 inode_unlock(orphan_dir_inode);
2110                 iput(orphan_dir_inode);
2111
2112                 mlog_errno(ret);
2113                 return ret;
2114         }
2115
2116         *ret_orphan_dir = orphan_dir_inode;
2117         *ret_orphan_dir_bh = orphan_dir_bh;
2118
2119         return 0;
2120 }
2121
2122 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2123                                       struct buffer_head *orphan_dir_bh,
2124                                       u64 blkno,
2125                                       char *name,
2126                                       struct ocfs2_dir_lookup_result *lookup,
2127                                       bool dio)
2128 {
2129         int ret;
2130         struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2131         int namelen = dio ?
2132                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2133                         OCFS2_ORPHAN_NAMELEN;
2134
2135         if (dio) {
2136                 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2137                                 OCFS2_DIO_ORPHAN_PREFIX);
2138                 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2139                         ret = -EINVAL;
2140                         mlog_errno(ret);
2141                         return ret;
2142                 }
2143
2144                 ret = ocfs2_blkno_stringify(blkno,
2145                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2146         } else
2147                 ret = ocfs2_blkno_stringify(blkno, name);
2148         if (ret < 0) {
2149                 mlog_errno(ret);
2150                 return ret;
2151         }
2152
2153         ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2154                                            orphan_dir_bh, name,
2155                                            namelen, lookup);
2156         if (ret < 0) {
2157                 mlog_errno(ret);
2158                 return ret;
2159         }
2160
2161         return 0;
2162 }
2163
2164 /**
2165  * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2166  * insertion of an orphan.
2167  * @osb: ocfs2 file system
2168  * @ret_orphan_dir: Orphan dir inode - returned locked!
2169  * @blkno: Actual block number of the inode to be inserted into orphan dir.
2170  * @lookup: dir lookup result, to be passed back into functions like
2171  *          ocfs2_orphan_add
2172  *
2173  * Returns zero on success and the ret_orphan_dir, name and lookup
2174  * fields will be populated.
2175  *
2176  * Returns non-zero on failure.
2177  */
2178 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2179                                     struct inode **ret_orphan_dir,
2180                                     u64 blkno,
2181                                     char *name,
2182                                     struct ocfs2_dir_lookup_result *lookup,
2183                                     bool dio)
2184 {
2185         struct inode *orphan_dir_inode = NULL;
2186         struct buffer_head *orphan_dir_bh = NULL;
2187         int ret = 0;
2188
2189         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2190                                            &orphan_dir_bh);
2191         if (ret < 0) {
2192                 mlog_errno(ret);
2193                 return ret;
2194         }
2195
2196         ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2197                                          blkno, name, lookup, dio);
2198         if (ret < 0) {
2199                 mlog_errno(ret);
2200                 goto out;
2201         }
2202
2203         *ret_orphan_dir = orphan_dir_inode;
2204
2205 out:
2206         brelse(orphan_dir_bh);
2207
2208         if (ret) {
2209                 ocfs2_inode_unlock(orphan_dir_inode, 1);
2210                 inode_unlock(orphan_dir_inode);
2211                 iput(orphan_dir_inode);
2212         }
2213
2214         if (ret)
2215                 mlog_errno(ret);
2216         return ret;
2217 }
2218
2219 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2220                             handle_t *handle,
2221                             struct inode *inode,
2222                             struct buffer_head *fe_bh,
2223                             char *name,
2224                             struct ocfs2_dir_lookup_result *lookup,
2225                             struct inode *orphan_dir_inode,
2226                             bool dio)
2227 {
2228         struct buffer_head *orphan_dir_bh = NULL;
2229         int status = 0;
2230         struct ocfs2_dinode *orphan_fe;
2231         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2232         int namelen = dio ?
2233                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2234                         OCFS2_ORPHAN_NAMELEN;
2235
2236         trace_ocfs2_orphan_add_begin(
2237                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2238
2239         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2240         if (status < 0) {
2241                 mlog_errno(status);
2242                 goto leave;
2243         }
2244
2245         status = ocfs2_journal_access_di(handle,
2246                                          INODE_CACHE(orphan_dir_inode),
2247                                          orphan_dir_bh,
2248                                          OCFS2_JOURNAL_ACCESS_WRITE);
2249         if (status < 0) {
2250                 mlog_errno(status);
2251                 goto leave;
2252         }
2253
2254         /*
2255          * We're going to journal the change of i_flags and i_orphaned_slot.
2256          * It's safe anyway, though some callers may duplicate the journaling.
2257          * Journaling within the func just make the logic look more
2258          * straightforward.
2259          */
2260         status = ocfs2_journal_access_di(handle,
2261                                          INODE_CACHE(inode),
2262                                          fe_bh,
2263                                          OCFS2_JOURNAL_ACCESS_WRITE);
2264         if (status < 0) {
2265                 mlog_errno(status);
2266                 goto leave;
2267         }
2268
2269         /* we're a cluster, and nlink can change on disk from
2270          * underneath us... */
2271         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2272         if (S_ISDIR(inode->i_mode))
2273                 ocfs2_add_links_count(orphan_fe, 1);
2274         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2275         ocfs2_journal_dirty(handle, orphan_dir_bh);
2276
2277         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2278                                    namelen, inode,
2279                                    OCFS2_I(inode)->ip_blkno,
2280                                    orphan_dir_bh, lookup);
2281         if (status < 0) {
2282                 mlog_errno(status);
2283                 goto rollback;
2284         }
2285
2286         if (dio) {
2287                 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2288                  * slot.
2289                  */
2290                 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2291                 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2292         } else {
2293                 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2294                 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2295
2296                 /* Record which orphan dir our inode now resides
2297                  * in. delete_inode will use this to determine which orphan
2298                  * dir to lock. */
2299                 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2300         }
2301
2302         ocfs2_journal_dirty(handle, fe_bh);
2303
2304         trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2305                                    osb->slot_num);
2306
2307 rollback:
2308         if (status < 0) {
2309                 if (S_ISDIR(inode->i_mode))
2310                         ocfs2_add_links_count(orphan_fe, -1);
2311                 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2312         }
2313
2314 leave:
2315         brelse(orphan_dir_bh);
2316
2317         return status;
2318 }
2319
2320 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2321 int ocfs2_orphan_del(struct ocfs2_super *osb,
2322                      handle_t *handle,
2323                      struct inode *orphan_dir_inode,
2324                      struct inode *inode,
2325                      struct buffer_head *orphan_dir_bh,
2326                      bool dio)
2327 {
2328         const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN;
2329         char name[namelen + 1];
2330         struct ocfs2_dinode *orphan_fe;
2331         int status = 0;
2332         struct ocfs2_dir_lookup_result lookup = { NULL, };
2333
2334         if (dio) {
2335                 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2336                                 OCFS2_DIO_ORPHAN_PREFIX);
2337                 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2338                         status = -EINVAL;
2339                         mlog_errno(status);
2340                         return status;
2341                 }
2342
2343                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2344                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2345         } else
2346                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2347         if (status < 0) {
2348                 mlog_errno(status);
2349                 goto leave;
2350         }
2351
2352         trace_ocfs2_orphan_del(
2353              (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2354              name, strlen(name));
2355
2356         status = ocfs2_journal_access_di(handle,
2357                                          INODE_CACHE(orphan_dir_inode),
2358                                          orphan_dir_bh,
2359                                          OCFS2_JOURNAL_ACCESS_WRITE);
2360         if (status < 0) {
2361                 mlog_errno(status);
2362                 goto leave;
2363         }
2364
2365         /* find it's spot in the orphan directory */
2366         status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2367                                   &lookup);
2368         if (status) {
2369                 mlog_errno(status);
2370                 goto leave;
2371         }
2372
2373         /* remove it from the orphan directory */
2374         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2375         if (status < 0) {
2376                 mlog_errno(status);
2377                 goto leave;
2378         }
2379
2380         /* do the i_nlink dance! :) */
2381         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2382         if (S_ISDIR(inode->i_mode))
2383                 ocfs2_add_links_count(orphan_fe, -1);
2384         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2385         ocfs2_journal_dirty(handle, orphan_dir_bh);
2386
2387 leave:
2388         ocfs2_free_dir_lookup_result(&lookup);
2389
2390         if (status)
2391                 mlog_errno(status);
2392         return status;
2393 }
2394
2395 /**
2396  * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2397  * allocated file. This is different from the typical 'add to orphan dir'
2398  * operation in that the inode does not yet exist. This is a problem because
2399  * the orphan dir stringifies the inode block number to come up with it's
2400  * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2401  * problem. This function works around it by calling deeper into the orphan
2402  * and suballoc code than other callers. Use this only by necessity.
2403  * @dir: The directory which this inode will ultimately wind up under - not the
2404  * orphan dir!
2405  * @dir_bh: buffer_head the @dir inode block
2406  * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2407  * with the string to be used for orphan dirent. Pass back to the orphan dir
2408  * code.
2409  * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2410  * dir code.
2411  * @ret_di_blkno: block number where the new inode will be allocated.
2412  * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2413  * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2414  *
2415  * Returns zero on success and the ret_orphan_dir, name and lookup
2416  * fields will be populated.
2417  *
2418  * Returns non-zero on failure.
2419  */
2420 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2421                                         struct buffer_head *dir_bh,
2422                                         char *orphan_name,
2423                                         struct inode **ret_orphan_dir,
2424                                         u64 *ret_di_blkno,
2425                                         struct ocfs2_dir_lookup_result *orphan_insert,
2426                                         struct ocfs2_alloc_context **ret_inode_ac)
2427 {
2428         int ret;
2429         u64 di_blkno;
2430         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2431         struct inode *orphan_dir = NULL;
2432         struct buffer_head *orphan_dir_bh = NULL;
2433         struct ocfs2_alloc_context *inode_ac = NULL;
2434
2435         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2436         if (ret < 0) {
2437                 mlog_errno(ret);
2438                 return ret;
2439         }
2440
2441         /* reserve an inode spot */
2442         ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2443         if (ret < 0) {
2444                 if (ret != -ENOSPC)
2445                         mlog_errno(ret);
2446                 goto out;
2447         }
2448
2449         ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2450                                        &di_blkno);
2451         if (ret) {
2452                 mlog_errno(ret);
2453                 goto out;
2454         }
2455
2456         ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2457                                          di_blkno, orphan_name, orphan_insert,
2458                                          false);
2459         if (ret < 0) {
2460                 mlog_errno(ret);
2461                 goto out;
2462         }
2463
2464 out:
2465         if (ret == 0) {
2466                 *ret_orphan_dir = orphan_dir;
2467                 *ret_di_blkno = di_blkno;
2468                 *ret_inode_ac = inode_ac;
2469                 /*
2470                  * orphan_name and orphan_insert are already up to
2471                  * date via prepare_orphan_dir
2472                  */
2473         } else {
2474                 /* Unroll reserve_new_inode* */
2475                 if (inode_ac)
2476                         ocfs2_free_alloc_context(inode_ac);
2477
2478                 /* Unroll orphan dir locking */
2479                 inode_unlock(orphan_dir);
2480                 ocfs2_inode_unlock(orphan_dir, 1);
2481                 iput(orphan_dir);
2482         }
2483
2484         brelse(orphan_dir_bh);
2485
2486         return ret;
2487 }
2488
2489 int ocfs2_create_inode_in_orphan(struct inode *dir,
2490                                  int mode,
2491                                  struct inode **new_inode)
2492 {
2493         int status, did_quota_inode = 0;
2494         struct inode *inode = NULL;
2495         struct inode *orphan_dir = NULL;
2496         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2497         struct ocfs2_dinode *di = NULL;
2498         handle_t *handle = NULL;
2499         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2500         struct buffer_head *parent_di_bh = NULL;
2501         struct buffer_head *new_di_bh = NULL;
2502         struct ocfs2_alloc_context *inode_ac = NULL;
2503         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2504         u64 uninitialized_var(di_blkno), suballoc_loc;
2505         u16 suballoc_bit;
2506
2507         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2508         if (status < 0) {
2509                 if (status != -ENOENT)
2510                         mlog_errno(status);
2511                 return status;
2512         }
2513
2514         status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2515                                               orphan_name, &orphan_dir,
2516                                               &di_blkno, &orphan_insert, &inode_ac);
2517         if (status < 0) {
2518                 if (status != -ENOSPC)
2519                         mlog_errno(status);
2520                 goto leave;
2521         }
2522
2523         inode = ocfs2_get_init_inode(dir, mode);
2524         if (IS_ERR(inode)) {
2525                 status = PTR_ERR(inode);
2526                 inode = NULL;
2527                 mlog_errno(status);
2528                 goto leave;
2529         }
2530
2531         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2532         if (IS_ERR(handle)) {
2533                 status = PTR_ERR(handle);
2534                 handle = NULL;
2535                 mlog_errno(status);
2536                 goto leave;
2537         }
2538
2539         status = dquot_alloc_inode(inode);
2540         if (status)
2541                 goto leave;
2542         did_quota_inode = 1;
2543
2544         status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2545                                               &suballoc_loc,
2546                                               &suballoc_bit, di_blkno);
2547         if (status < 0) {
2548                 mlog_errno(status);
2549                 goto leave;
2550         }
2551
2552         clear_nlink(inode);
2553         /* do the real work now. */
2554         status = __ocfs2_mknod_locked(dir, inode,
2555                                       0, &new_di_bh, parent_di_bh, handle,
2556                                       inode_ac, di_blkno, suballoc_loc,
2557                                       suballoc_bit);
2558         if (status < 0) {
2559                 mlog_errno(status);
2560                 goto leave;
2561         }
2562
2563         di = (struct ocfs2_dinode *)new_di_bh->b_data;
2564         status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2565                                   &orphan_insert, orphan_dir, false);
2566         if (status < 0) {
2567                 mlog_errno(status);
2568                 goto leave;
2569         }
2570
2571         /* get open lock so that only nodes can't remove it from orphan dir. */
2572         status = ocfs2_open_lock(inode);
2573         if (status < 0)
2574                 mlog_errno(status);
2575
2576         insert_inode_hash(inode);
2577 leave:
2578         if (status < 0 && did_quota_inode)
2579                 dquot_free_inode(inode);
2580         if (handle)
2581                 ocfs2_commit_trans(osb, handle);
2582
2583         if (orphan_dir) {
2584                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2585                 ocfs2_inode_unlock(orphan_dir, 1);
2586                 inode_unlock(orphan_dir);
2587                 iput(orphan_dir);
2588         }
2589
2590         if ((status < 0) && inode) {
2591                 clear_nlink(inode);
2592                 iput(inode);
2593         }
2594
2595         if (inode_ac)
2596                 ocfs2_free_alloc_context(inode_ac);
2597
2598         brelse(new_di_bh);
2599
2600         if (!status)
2601                 *new_inode = inode;
2602
2603         ocfs2_free_dir_lookup_result(&orphan_insert);
2604
2605         ocfs2_inode_unlock(dir, 1);
2606         brelse(parent_di_bh);
2607         return status;
2608 }
2609
2610 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2611         struct inode *inode)
2612 {
2613         char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2614         struct inode *orphan_dir_inode = NULL;
2615         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2616         struct buffer_head *di_bh = NULL;
2617         int status = 0;
2618         handle_t *handle = NULL;
2619         struct ocfs2_dinode *di = NULL;
2620
2621         status = ocfs2_inode_lock(inode, &di_bh, 1);
2622         if (status < 0) {
2623                 mlog_errno(status);
2624                 goto bail;
2625         }
2626
2627         di = (struct ocfs2_dinode *) di_bh->b_data;
2628         /*
2629          * Another append dio crashed?
2630          * If so, manually recover it first.
2631          */
2632         if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2633                 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2634                 if (status < 0) {
2635                         if (status != -ENOSPC)
2636                                 mlog_errno(status);
2637                         goto bail_unlock_inode;
2638                 }
2639
2640                 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2641                 if (status < 0) {
2642                         mlog_errno(status);
2643                         goto bail_unlock_inode;
2644                 }
2645         }
2646
2647         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2648                         OCFS2_I(inode)->ip_blkno,
2649                         orphan_name,
2650                         &orphan_insert,
2651                         true);
2652         if (status < 0) {
2653                 mlog_errno(status);
2654                 goto bail_unlock_inode;
2655         }
2656
2657         handle = ocfs2_start_trans(osb,
2658                         OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2659         if (IS_ERR(handle)) {
2660                 status = PTR_ERR(handle);
2661                 goto bail_unlock_orphan;
2662         }
2663
2664         status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2665                         &orphan_insert, orphan_dir_inode, true);
2666         if (status)
2667                 mlog_errno(status);
2668
2669         ocfs2_commit_trans(osb, handle);
2670
2671 bail_unlock_orphan:
2672         ocfs2_inode_unlock(orphan_dir_inode, 1);
2673         inode_unlock(orphan_dir_inode);
2674         iput(orphan_dir_inode);
2675
2676         ocfs2_free_dir_lookup_result(&orphan_insert);
2677
2678 bail_unlock_inode:
2679         ocfs2_inode_unlock(inode, 1);
2680         brelse(di_bh);
2681
2682 bail:
2683         return status;
2684 }
2685
2686 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2687                 struct inode *inode, struct buffer_head *di_bh,
2688                 int update_isize, loff_t end)
2689 {
2690         struct inode *orphan_dir_inode = NULL;
2691         struct buffer_head *orphan_dir_bh = NULL;
2692         struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2693         handle_t *handle = NULL;
2694         int status = 0;
2695
2696         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2697                         ORPHAN_DIR_SYSTEM_INODE,
2698                         le16_to_cpu(di->i_dio_orphaned_slot));
2699         if (!orphan_dir_inode) {
2700                 status = -ENOENT;
2701                 mlog_errno(status);
2702                 goto bail;
2703         }
2704
2705         inode_lock(orphan_dir_inode);
2706         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2707         if (status < 0) {
2708                 inode_unlock(orphan_dir_inode);
2709                 iput(orphan_dir_inode);
2710                 mlog_errno(status);
2711                 goto bail;
2712         }
2713
2714         handle = ocfs2_start_trans(osb,
2715                         OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2716         if (IS_ERR(handle)) {
2717                 status = PTR_ERR(handle);
2718                 goto bail_unlock_orphan;
2719         }
2720
2721         BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2722
2723         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2724                                 inode, orphan_dir_bh, true);
2725         if (status < 0) {
2726                 mlog_errno(status);
2727                 goto bail_commit;
2728         }
2729
2730         status = ocfs2_journal_access_di(handle,
2731                         INODE_CACHE(inode),
2732                         di_bh,
2733                         OCFS2_JOURNAL_ACCESS_WRITE);
2734         if (status < 0) {
2735                 mlog_errno(status);
2736                 goto bail_commit;
2737         }
2738
2739         di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2740         di->i_dio_orphaned_slot = 0;
2741
2742         if (update_isize) {
2743                 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2744                 if (status)
2745                         mlog_errno(status);
2746         } else
2747                 ocfs2_journal_dirty(handle, di_bh);
2748
2749 bail_commit:
2750         ocfs2_commit_trans(osb, handle);
2751
2752 bail_unlock_orphan:
2753         ocfs2_inode_unlock(orphan_dir_inode, 1);
2754         inode_unlock(orphan_dir_inode);
2755         brelse(orphan_dir_bh);
2756         iput(orphan_dir_inode);
2757
2758 bail:
2759         return status;
2760 }
2761
2762 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2763                                    struct inode *inode,
2764                                    struct dentry *dentry)
2765 {
2766         int status = 0;
2767         struct buffer_head *parent_di_bh = NULL;
2768         handle_t *handle = NULL;
2769         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2770         struct ocfs2_dinode *dir_di, *di;
2771         struct inode *orphan_dir_inode = NULL;
2772         struct buffer_head *orphan_dir_bh = NULL;
2773         struct buffer_head *di_bh = NULL;
2774         struct ocfs2_dir_lookup_result lookup = { NULL, };
2775
2776         trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2777                                 dentry->d_name.len, dentry->d_name.name,
2778                                 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2779                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2780
2781         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2782         if (status < 0) {
2783                 if (status != -ENOENT)
2784                         mlog_errno(status);
2785                 return status;
2786         }
2787
2788         dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2789         if (!dir_di->i_links_count) {
2790                 /* can't make a file in a deleted directory. */
2791                 status = -ENOENT;
2792                 goto leave;
2793         }
2794
2795         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2796                                            dentry->d_name.len);
2797         if (status)
2798                 goto leave;
2799
2800         /* get a spot inside the dir. */
2801         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2802                                               dentry->d_name.name,
2803                                               dentry->d_name.len, &lookup);
2804         if (status < 0) {
2805                 mlog_errno(status);
2806                 goto leave;
2807         }
2808
2809         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2810                                                        ORPHAN_DIR_SYSTEM_INODE,
2811                                                        osb->slot_num);
2812         if (!orphan_dir_inode) {
2813                 status = -ENOENT;
2814                 mlog_errno(status);
2815                 goto leave;
2816         }
2817
2818         inode_lock(orphan_dir_inode);
2819
2820         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2821         if (status < 0) {
2822                 mlog_errno(status);
2823                 inode_unlock(orphan_dir_inode);
2824                 iput(orphan_dir_inode);
2825                 goto leave;
2826         }
2827
2828         status = ocfs2_read_inode_block(inode, &di_bh);
2829         if (status < 0) {
2830                 mlog_errno(status);
2831                 goto orphan_unlock;
2832         }
2833
2834         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2835         if (IS_ERR(handle)) {
2836                 status = PTR_ERR(handle);
2837                 handle = NULL;
2838                 mlog_errno(status);
2839                 goto orphan_unlock;
2840         }
2841
2842         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2843                                          di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2844         if (status < 0) {
2845                 mlog_errno(status);
2846                 goto out_commit;
2847         }
2848
2849         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2850                                   orphan_dir_bh, false);
2851         if (status < 0) {
2852                 mlog_errno(status);
2853                 goto out_commit;
2854         }
2855
2856         di = (struct ocfs2_dinode *)di_bh->b_data;
2857         di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2858         di->i_orphaned_slot = 0;
2859         set_nlink(inode, 1);
2860         ocfs2_set_links_count(di, inode->i_nlink);
2861         ocfs2_update_inode_fsync_trans(handle, inode, 1);
2862         ocfs2_journal_dirty(handle, di_bh);
2863
2864         status = ocfs2_add_entry(handle, dentry, inode,
2865                                  OCFS2_I(inode)->ip_blkno, parent_di_bh,
2866                                  &lookup);
2867         if (status < 0) {
2868                 mlog_errno(status);
2869                 goto out_commit;
2870         }
2871
2872         status = ocfs2_dentry_attach_lock(dentry, inode,
2873                                           OCFS2_I(dir)->ip_blkno);
2874         if (status) {
2875                 mlog_errno(status);
2876                 goto out_commit;
2877         }
2878
2879         d_instantiate(dentry, inode);
2880         status = 0;
2881 out_commit:
2882         ocfs2_commit_trans(osb, handle);
2883 orphan_unlock:
2884         ocfs2_inode_unlock(orphan_dir_inode, 1);
2885         inode_unlock(orphan_dir_inode);
2886         iput(orphan_dir_inode);
2887 leave:
2888
2889         ocfs2_inode_unlock(dir, 1);
2890
2891         brelse(di_bh);
2892         brelse(parent_di_bh);
2893         brelse(orphan_dir_bh);
2894
2895         ocfs2_free_dir_lookup_result(&lookup);
2896
2897         if (status)
2898                 mlog_errno(status);
2899
2900         return status;
2901 }
2902
2903 const struct inode_operations ocfs2_dir_iops = {
2904         .create         = ocfs2_create,
2905         .lookup         = ocfs2_lookup,
2906         .link           = ocfs2_link,
2907         .unlink         = ocfs2_unlink,
2908         .rmdir          = ocfs2_unlink,
2909         .symlink        = ocfs2_symlink,
2910         .mkdir          = ocfs2_mkdir,
2911         .mknod          = ocfs2_mknod,
2912         .rename         = ocfs2_rename,
2913         .setattr        = ocfs2_setattr,
2914         .getattr        = ocfs2_getattr,
2915         .permission     = ocfs2_permission,
2916         .setxattr       = generic_setxattr,
2917         .getxattr       = generic_getxattr,
2918         .listxattr      = ocfs2_listxattr,
2919         .removexattr    = generic_removexattr,
2920         .fiemap         = ocfs2_fiemap,
2921         .get_acl        = ocfs2_iop_get_acl,
2922         .set_acl        = ocfs2_iop_set_acl,
2923 };