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 #define OCFS2_DIO_ORPHAN_PREFIX "dio-"
 110 #define OCFS2_DIO_ORPHAN_PREFIX_LEN 4
 111
 112 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
 113                                    unsigned int flags)
 114 {
 115         int status;
 116         u64 blkno;
 117         struct inode *inode = NULL;
 118         struct dentry *ret;
 119         struct ocfs2_inode_info *oi;
 120
 121         trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
 122                            dentry->d_name.name,
 123                            (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
 124
 125         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
 126                 ret = ERR_PTR(-ENAMETOOLONG);
 127                 goto bail;
 128         }
 129
 130         status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
 131         if (status < 0) {
 132                 if (status != -ENOENT)
 133                         mlog_errno(status);
 134                 ret = ERR_PTR(status);
 135                 goto bail;
 136         }
 137
 138         status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
 139                                             dentry->d_name.len, &blkno);
 140         if (status < 0)
 141                 goto bail_add;
 142
 143         inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
 144         if (IS_ERR(inode)) {
 145                 ret = ERR_PTR(-EACCES);
 146                 goto bail_unlock;
 147         }
 148
 149         oi = OCFS2_I(inode);
 150         /* Clear any orphaned state... If we were able to look up the
 151          * inode from a directory, it certainly can't be orphaned. We
 152          * might have the bad state from a node which intended to
 153          * orphan this inode but crashed before it could commit the
 154          * unlink. */
 155         spin_lock(&oi->ip_lock);
 156         oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
 157         spin_unlock(&oi->ip_lock);
 158
 159 bail_add:
 160         ret = d_splice_alias(inode, dentry);
 161
 162         if (inode) {
 163                 /*
 164                  * If d_splice_alias() finds a DCACHE_DISCONNECTED
 165                  * dentry, it will d_move() it on top of ourse. The
 166                  * return value will indicate this however, so in
 167                  * those cases, we switch them around for the locking
 168                  * code.
 169                  *
 170                  * NOTE: This dentry already has ->d_op set from
 171                  * ocfs2_get_parent() and ocfs2_get_dentry()
 172                  */
 173                 if (!IS_ERR_OR_NULL(ret))
 174                         dentry = ret;
 175
 176                 status = ocfs2_dentry_attach_lock(dentry, inode,
 177                                                   OCFS2_I(dir)->ip_blkno);
 178                 if (status) {
 179                         mlog_errno(status);
 180                         ret = ERR_PTR(status);
 181                         goto bail_unlock;
 182                 }
 183         } else
 184                 ocfs2_dentry_attach_gen(dentry);
 185
 186 bail_unlock:
 187         /* Don't drop the cluster lock until *after* the d_add --
 188          * unlink on another node will message us to remove that
 189          * dentry under this lock so otherwise we can race this with
 190          * the downconvert thread and have a stale dentry. */
 191         ocfs2_inode_unlock(dir, 0);
 192
 193 bail:
 194
 195         trace_ocfs2_lookup_ret(ret);
 196
 197         return ret;
 198 }
 199
 200 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
 201 {
 202         struct inode *inode;
 203         int status;
 204
 205         inode = new_inode(dir->i_sb);
 206         if (!inode) {
 207                 mlog(ML_ERROR, "new_inode failed!\n");
 208                 return ERR_PTR(-ENOMEM);
 209         }
 210
 211         /* populate as many fields early on as possible - many of
 212          * these are used by the support functions here and in
 213          * callers. */
 214         if (S_ISDIR(mode))
 215                 set_nlink(inode, 2);
 216         inode_init_owner(inode, dir, mode);
 217         status = dquot_initialize(inode);
 218         if (status)
 219                 return ERR_PTR(status);
 220
 221         return inode;
 222 }
 223
 224 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
 225                 struct dentry *dentry, struct inode *inode)
 226 {
 227         struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
 228
 229         ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
 230         ocfs2_lock_res_free(&dl->dl_lockres);
 231         BUG_ON(dl->dl_count != 1);
 232         spin_lock(&dentry_attach_lock);
 233         dentry->d_fsdata = NULL;
 234         spin_unlock(&dentry_attach_lock);
 235         kfree(dl);
 236         iput(inode);
 237 }
 238
 239 static int ocfs2_mknod(struct inode *dir,
 240                        struct dentry *dentry,
 241                        umode_t mode,
 242                        dev_t dev)
 243 {
 244         int status = 0;
 245         struct buffer_head *parent_fe_bh = NULL;
 246         handle_t *handle = NULL;
 247         struct ocfs2_super *osb;
 248         struct ocfs2_dinode *dirfe;
 249         struct buffer_head *new_fe_bh = NULL;
 250         struct inode *inode = NULL;
 251         struct ocfs2_alloc_context *inode_ac = NULL;
 252         struct ocfs2_alloc_context *data_ac = NULL;
 253         struct ocfs2_alloc_context *meta_ac = NULL;
 254         int want_clusters = 0;
 255         int want_meta = 0;
 256         int xattr_credits = 0;
 257         struct ocfs2_security_xattr_info si = {
 258                 .enable = 1,
 259         };
 260         int did_quota_inode = 0;
 261         struct ocfs2_dir_lookup_result lookup = { NULL, };
 262         sigset_t oldset;
 263         int did_block_signals = 0;
 264         struct posix_acl *default_acl = NULL, *acl = NULL;
 265         struct ocfs2_dentry_lock *dl = NULL;
 266
 267         trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 268                           (unsigned long long)OCFS2_I(dir)->ip_blkno,
 269                           (unsigned long)dev, mode);
 270
 271         status = dquot_initialize(dir);
 272         if (status) {
 273                 mlog_errno(status);
 274                 return status;
 275         }
 276
 277         /* get our super block */
 278         osb = OCFS2_SB(dir->i_sb);
 279
 280         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
 281         if (status < 0) {
 282                 if (status != -ENOENT)
 283                         mlog_errno(status);
 284                 return status;
 285         }
 286
 287         if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
 288                 status = -EMLINK;
 289                 goto leave;
 290         }
 291
 292         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
 293         if (!ocfs2_read_links_count(dirfe)) {
 294                 /* can't make a file in a deleted directory. */
 295                 status = -ENOENT;
 296                 goto leave;
 297         }
 298
 299         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 300                                            dentry->d_name.len);
 301         if (status)
 302                 goto leave;
 303
 304         /* get a spot inside the dir. */
 305         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 306                                               dentry->d_name.name,
 307                                               dentry->d_name.len, &lookup);
 308         if (status < 0) {
 309                 mlog_errno(status);
 310                 goto leave;
 311         }
 312
 313         /* reserve an inode spot */
 314         status = ocfs2_reserve_new_inode(osb, &inode_ac);
 315         if (status < 0) {
 316                 if (status != -ENOSPC)
 317                         mlog_errno(status);
 318                 goto leave;
 319         }
 320
 321         inode = ocfs2_get_init_inode(dir, mode);
 322         if (IS_ERR(inode)) {
 323                 status = PTR_ERR(inode);
 324                 inode = NULL;
 325                 mlog_errno(status);
 326                 goto leave;
 327         }
 328
 329         /* get security xattr */
 330         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
 331         if (status) {
 332                 if (status == -EOPNOTSUPP)
 333                         si.enable = 0;
 334                 else {
 335                         mlog_errno(status);
 336                         goto leave;
 337                 }
 338         }
 339
 340         /* calculate meta data/clusters for setting security and acl xattr */
 341         status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
 342                                        &si, &want_clusters,
 343                                        &xattr_credits, &want_meta);
 344         if (status < 0) {
 345                 mlog_errno(status);
 346                 goto leave;
 347         }
 348
 349         /* Reserve a cluster if creating an extent based directory. */
 350         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
 351                 want_clusters += 1;
 352
 353                 /* Dir indexing requires extra space as well */
 354                 if (ocfs2_supports_indexed_dirs(osb))
 355                         want_meta++;
 356         }
 357
 358         status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
 359         if (status < 0) {
 360                 if (status != -ENOSPC)
 361                         mlog_errno(status);
 362                 goto leave;
 363         }
 364
 365         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
 366         if (status < 0) {
 367                 if (status != -ENOSPC)
 368                         mlog_errno(status);
 369                 goto leave;
 370         }
 371
 372         status = posix_acl_create(dir, &mode, &default_acl, &acl);
 373         if (status) {
 374                 mlog_errno(status);
 375                 goto leave;
 376         }
 377
 378         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
 379                                                             S_ISDIR(mode),
 380                                                             xattr_credits));
 381         if (IS_ERR(handle)) {
 382                 status = PTR_ERR(handle);
 383                 handle = NULL;
 384                 mlog_errno(status);
 385                 goto leave;
 386         }
 387
 388         /* Starting to change things, restart is no longer possible. */
 389         ocfs2_block_signals(&oldset);
 390         did_block_signals = 1;
 391
 392         status = dquot_alloc_inode(inode);
 393         if (status)
 394                 goto leave;
 395         did_quota_inode = 1;
 396
 397         /* do the real work now. */
 398         status = ocfs2_mknod_locked(osb, dir, inode, dev,
 399                                     &new_fe_bh, parent_fe_bh, handle,
 400                                     inode_ac);
 401         if (status < 0) {
 402                 mlog_errno(status);
 403                 goto leave;
 404         }
 405
 406         if (S_ISDIR(mode)) {
 407                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
 408                                             new_fe_bh, data_ac, meta_ac);
 409                 if (status < 0) {
 410                         mlog_errno(status);
 411                         goto leave;
 412                 }
 413
 414                 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
 415                                                  parent_fe_bh,
 416                                                  OCFS2_JOURNAL_ACCESS_WRITE);
 417                 if (status < 0) {
 418                         mlog_errno(status);
 419                         goto leave;
 420                 }
 421                 ocfs2_add_links_count(dirfe, 1);
 422                 ocfs2_journal_dirty(handle, parent_fe_bh);
 423                 inc_nlink(dir);
 424         }
 425
 426         if (default_acl) {
 427                 status = ocfs2_set_acl(handle, inode, new_fe_bh,
 428                                        ACL_TYPE_DEFAULT, default_acl,
 429                                        meta_ac, data_ac);
 430         }
 431         if (!status && acl) {
 432                 status = ocfs2_set_acl(handle, inode, new_fe_bh,
 433                                        ACL_TYPE_ACCESS, acl,
 434                                        meta_ac, data_ac);
 435         }
 436
 437         if (status < 0) {
 438                 mlog_errno(status);
 439                 goto leave;
 440         }
 441
 442         if (si.enable) {
 443                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
 444                                                  meta_ac, data_ac);
 445                 if (status < 0) {
 446                         mlog_errno(status);
 447                         goto leave;
 448                 }
 449         }
 450
 451         /*
 452          * Do this before adding the entry to the directory. We add
 453          * also set d_op after success so that ->d_iput() will cleanup
 454          * the dentry lock even if ocfs2_add_entry() fails below.
 455          */
 456         status = ocfs2_dentry_attach_lock(dentry, inode,
 457                                           OCFS2_I(dir)->ip_blkno);
 458         if (status) {
 459                 mlog_errno(status);
 460                 goto leave;
 461         }
 462
 463         dl = dentry->d_fsdata;
 464
 465         status = ocfs2_add_entry(handle, dentry, inode,
 466                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
 467                                  &lookup);
 468         if (status < 0) {
 469                 mlog_errno(status);
 470                 goto leave;
 471         }
 472
 473         insert_inode_hash(inode);
 474         d_instantiate(dentry, inode);
 475         status = 0;
 476 leave:
 477         if (default_acl)
 478                 posix_acl_release(default_acl);
 479         if (acl)
 480                 posix_acl_release(acl);
 481         if (status < 0 && did_quota_inode)
 482                 dquot_free_inode(inode);
 483         if (handle)
 484                 ocfs2_commit_trans(osb, handle);
 485
 486         ocfs2_inode_unlock(dir, 1);
 487         if (did_block_signals)
 488                 ocfs2_unblock_signals(&oldset);
 489
 490         brelse(new_fe_bh);
 491         brelse(parent_fe_bh);
 492         kfree(si.value);
 493
 494         ocfs2_free_dir_lookup_result(&lookup);
 495
 496         if (inode_ac)
 497                 ocfs2_free_alloc_context(inode_ac);
 498
 499         if (data_ac)
 500                 ocfs2_free_alloc_context(data_ac);
 501
 502         if (meta_ac)
 503                 ocfs2_free_alloc_context(meta_ac);
 504
 505         /*
 506          * We should call iput after the i_mutex of the bitmap been
 507          * unlocked in ocfs2_free_alloc_context, or the
 508          * ocfs2_delete_inode will mutex_lock again.
 509          */
 510         if ((status < 0) && inode) {
 511                 if (dl)
 512                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
 513
 514                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
 515                 clear_nlink(inode);
 516                 iput(inode);
 517         }
 518
 519         if (status)
 520                 mlog_errno(status);
 521
 522         return status;
 523 }
 524
 525 static int __ocfs2_mknod_locked(struct inode *dir,
 526                                 struct inode *inode,
 527                                 dev_t dev,
 528                                 struct buffer_head **new_fe_bh,
 529                                 struct buffer_head *parent_fe_bh,
 530                                 handle_t *handle,
 531                                 struct ocfs2_alloc_context *inode_ac,
 532                                 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
 533 {
 534         int status = 0;
 535         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 536         struct ocfs2_dinode *fe = NULL;
 537         struct ocfs2_extent_list *fel;
 538         u16 feat;
 539         struct ocfs2_inode_info *oi = OCFS2_I(inode);
 540
 541         *new_fe_bh = NULL;
 542
 543         /* populate as many fields early on as possible - many of
 544          * these are used by the support functions here and in
 545          * callers. */
 546         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
 547         OCFS2_I(inode)->ip_blkno = fe_blkno;
 548         spin_lock(&osb->osb_lock);
 549         inode->i_generation = osb->s_next_generation++;
 550         spin_unlock(&osb->osb_lock);
 551
 552         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
 553         if (!*new_fe_bh) {
 554                 status = -ENOMEM;
 555                 mlog_errno(status);
 556                 goto leave;
 557         }
 558         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
 559
 560         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
 561                                          *new_fe_bh,
 562                                          OCFS2_JOURNAL_ACCESS_CREATE);
 563         if (status < 0) {
 564                 mlog_errno(status);
 565                 goto leave;
 566         }
 567
 568         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
 569         memset(fe, 0, osb->sb->s_blocksize);
 570
 571         fe->i_generation = cpu_to_le32(inode->i_generation);
 572         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
 573         fe->i_blkno = cpu_to_le64(fe_blkno);
 574         fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
 575         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
 576         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
 577         fe->i_uid = cpu_to_le32(i_uid_read(inode));
 578         fe->i_gid = cpu_to_le32(i_gid_read(inode));
 579         fe->i_mode = cpu_to_le16(inode->i_mode);
 580         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 581                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
 582
 583         ocfs2_set_links_count(fe, inode->i_nlink);
 584
 585         fe->i_last_eb_blk = 0;
 586         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 587         fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
 588         fe->i_atime = fe->i_ctime = fe->i_mtime =
 589                 cpu_to_le64(CURRENT_TIME.tv_sec);
 590         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
 591                 cpu_to_le32(CURRENT_TIME.tv_nsec);
 592         fe->i_dtime = 0;
 593
 594         /*
 595          * If supported, directories start with inline data. If inline
 596          * isn't supported, but indexing is, we start them as indexed.
 597          */
 598         feat = le16_to_cpu(fe->i_dyn_features);
 599         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
 600                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
 601
 602                 fe->id2.i_data.id_count = cpu_to_le16(
 603                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
 604         } else {
 605                 fel = &fe->id2.i_list;
 606                 fel->l_tree_depth = 0;
 607                 fel->l_next_free_rec = 0;
 608                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
 609         }
 610
 611         ocfs2_journal_dirty(handle, *new_fe_bh);
 612
 613         ocfs2_populate_inode(inode, fe, 1);
 614         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
 615         if (!ocfs2_mount_local(osb)) {
 616                 status = ocfs2_create_new_inode_locks(inode);
 617                 if (status < 0)
 618                         mlog_errno(status);
 619         }
 620
 621         oi->i_sync_tid = handle->h_transaction->t_tid;
 622         oi->i_datasync_tid = handle->h_transaction->t_tid;
 623
 624 leave:
 625         if (status < 0) {
 626                 if (*new_fe_bh) {
 627                         brelse(*new_fe_bh);
 628                         *new_fe_bh = NULL;
 629                 }
 630         }
 631
 632         if (status)
 633                 mlog_errno(status);
 634         return status;
 635 }
 636
 637 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 638                               struct inode *dir,
 639                               struct inode *inode,
 640                               dev_t dev,
 641                               struct buffer_head **new_fe_bh,
 642                               struct buffer_head *parent_fe_bh,
 643                               handle_t *handle,
 644                               struct ocfs2_alloc_context *inode_ac)
 645 {
 646         int status = 0;
 647         u64 suballoc_loc, fe_blkno = 0;
 648         u16 suballoc_bit;
 649
 650         *new_fe_bh = NULL;
 651
 652         status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
 653                                        inode_ac, &suballoc_loc,
 654                                        &suballoc_bit, &fe_blkno);
 655         if (status < 0) {
 656                 mlog_errno(status);
 657                 return status;
 658         }
 659
 660         return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
 661                                     parent_fe_bh, handle, inode_ac,
 662                                     fe_blkno, suballoc_loc, suballoc_bit);
 663 }
 664
 665 static int ocfs2_mkdir(struct inode *dir,
 666                        struct dentry *dentry,
 667                        umode_t mode)
 668 {
 669         int ret;
 670
 671         trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 672                           OCFS2_I(dir)->ip_blkno, mode);
 673         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
 674         if (ret)
 675                 mlog_errno(ret);
 676
 677         return ret;
 678 }
 679
 680 static int ocfs2_create(struct inode *dir,
 681                         struct dentry *dentry,
 682                         umode_t mode,
 683                         bool excl)
 684 {
 685         int ret;
 686
 687         trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 688                            (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
 689         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
 690         if (ret)
 691                 mlog_errno(ret);
 692
 693         return ret;
 694 }
 695
 696 static int ocfs2_link(struct dentry *old_dentry,
 697                       struct inode *dir,
 698                       struct dentry *dentry)
 699 {
 700         handle_t *handle;
 701         struct inode *inode = d_inode(old_dentry);
 702         struct inode *old_dir = d_inode(old_dentry->d_parent);
 703         int err;
 704         struct buffer_head *fe_bh = NULL;
 705         struct buffer_head *old_dir_bh = NULL;
 706         struct buffer_head *parent_fe_bh = NULL;
 707         struct ocfs2_dinode *fe = NULL;
 708         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 709         struct ocfs2_dir_lookup_result lookup = { NULL, };
 710         sigset_t oldset;
 711         u64 old_de_ino;
 712
 713         trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
 714                          old_dentry->d_name.len, old_dentry->d_name.name,
 715                          dentry->d_name.len, dentry->d_name.name);
 716
 717         if (S_ISDIR(inode->i_mode))
 718                 return -EPERM;
 719
 720         err = dquot_initialize(dir);
 721         if (err) {
 722                 mlog_errno(err);
 723                 return err;
 724         }
 725
 726         err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
 727                         &parent_fe_bh, dir, 0);
 728         if (err < 0) {
 729                 if (err != -ENOENT)
 730                         mlog_errno(err);
 731                 return err;
 732         }
 733
 734         /* make sure both dirs have bhs
 735          * get an extra ref on old_dir_bh if old==new */
 736         if (!parent_fe_bh) {
 737                 if (old_dir_bh) {
 738                         parent_fe_bh = old_dir_bh;
 739                         get_bh(parent_fe_bh);
 740                 } else {
 741                         mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
 742                         err = -EIO;
 743                         goto out;
 744                 }
 745         }
 746
 747         if (!dir->i_nlink) {
 748                 err = -ENOENT;
 749                 goto out;
 750         }
 751
 752         err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
 753                         old_dentry->d_name.len, &old_de_ino);
 754         if (err) {
 755                 err = -ENOENT;
 756                 goto out;
 757         }
 758
 759         /*
 760          * Check whether another node removed the source inode while we
 761          * were in the vfs.
 762          */
 763         if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
 764                 err = -ENOENT;
 765                 goto out;
 766         }
 767
 768         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 769                                         dentry->d_name.len);
 770         if (err)
 771                 goto out;
 772
 773         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 774                                            dentry->d_name.name,
 775                                            dentry->d_name.len, &lookup);
 776         if (err < 0) {
 777                 mlog_errno(err);
 778                 goto out;
 779         }
 780
 781         err = ocfs2_inode_lock(inode, &fe_bh, 1);
 782         if (err < 0) {
 783                 if (err != -ENOENT)
 784                         mlog_errno(err);
 785                 goto out;
 786         }
 787
 788         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 789         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
 790                 err = -EMLINK;
 791                 goto out_unlock_inode;
 792         }
 793
 794         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
 795         if (IS_ERR(handle)) {
 796                 err = PTR_ERR(handle);
 797                 handle = NULL;
 798                 mlog_errno(err);
 799                 goto out_unlock_inode;
 800         }
 801
 802         /* Starting to change things, restart is no longer possible. */
 803         ocfs2_block_signals(&oldset);
 804
 805         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 806                                       OCFS2_JOURNAL_ACCESS_WRITE);
 807         if (err < 0) {
 808                 mlog_errno(err);
 809                 goto out_commit;
 810         }
 811
 812         inc_nlink(inode);
 813         inode->i_ctime = CURRENT_TIME;
 814         ocfs2_set_links_count(fe, inode->i_nlink);
 815         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 816         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 817         ocfs2_journal_dirty(handle, fe_bh);
 818
 819         err = ocfs2_add_entry(handle, dentry, inode,
 820                               OCFS2_I(inode)->ip_blkno,
 821                               parent_fe_bh, &lookup);
 822         if (err) {
 823                 ocfs2_add_links_count(fe, -1);
 824                 drop_nlink(inode);
 825                 mlog_errno(err);
 826                 goto out_commit;
 827         }
 828
 829         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
 830         if (err) {
 831                 mlog_errno(err);
 832                 goto out_commit;
 833         }
 834
 835         ihold(inode);
 836         d_instantiate(dentry, inode);
 837
 838 out_commit:
 839         ocfs2_commit_trans(osb, handle);
 840         ocfs2_unblock_signals(&oldset);
 841 out_unlock_inode:
 842         ocfs2_inode_unlock(inode, 1);
 843
 844 out:
 845         ocfs2_double_unlock(old_dir, dir);
 846
 847         brelse(fe_bh);
 848         brelse(parent_fe_bh);
 849         brelse(old_dir_bh);
 850
 851         ocfs2_free_dir_lookup_result(&lookup);
 852
 853         if (err)
 854                 mlog_errno(err);
 855
 856         return err;
 857 }
 858
 859 /*
 860  * Takes and drops an exclusive lock on the given dentry. This will
 861  * force other nodes to drop it.
 862  */
 863 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 864 {
 865         int ret;
 866
 867         ret = ocfs2_dentry_lock(dentry, 1);
 868         if (ret)
 869                 mlog_errno(ret);
 870         else
 871                 ocfs2_dentry_unlock(dentry, 1);
 872
 873         return ret;
 874 }
 875
 876 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
 877 {
 878         if (S_ISDIR(inode->i_mode)) {
 879                 if (inode->i_nlink == 2)
 880                         return 1;
 881                 return 0;
 882         }
 883
 884         if (inode->i_nlink == 1)
 885                 return 1;
 886         return 0;
 887 }
 888
 889 static int ocfs2_unlink(struct inode *dir,
 890                         struct dentry *dentry)
 891 {
 892         int status;
 893         int child_locked = 0;
 894         bool is_unlinkable = false;
 895         struct inode *inode = d_inode(dentry);
 896         struct inode *orphan_dir = NULL;
 897         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 898         u64 blkno;
 899         struct ocfs2_dinode *fe = NULL;
 900         struct buffer_head *fe_bh = NULL;
 901         struct buffer_head *parent_node_bh = NULL;
 902         handle_t *handle = NULL;
 903         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 904         struct ocfs2_dir_lookup_result lookup = { NULL, };
 905         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
 906
 907         trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
 908                            dentry->d_name.name,
 909                            (unsigned long long)OCFS2_I(dir)->ip_blkno,
 910                            (unsigned long long)OCFS2_I(inode)->ip_blkno);
 911
 912         status = dquot_initialize(dir);
 913         if (status) {
 914                 mlog_errno(status);
 915                 return status;
 916         }
 917
 918         BUG_ON(d_inode(dentry->d_parent) != dir);
 919
 920         if (inode == osb->root_inode)
 921                 return -EPERM;
 922
 923         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
 924                                          OI_LS_PARENT);
 925         if (status < 0) {
 926                 if (status != -ENOENT)
 927                         mlog_errno(status);
 928                 return status;
 929         }
 930
 931         status = ocfs2_find_files_on_disk(dentry->d_name.name,
 932                                           dentry->d_name.len, &blkno, dir,
 933                                           &lookup);
 934         if (status < 0) {
 935                 if (status != -ENOENT)
 936                         mlog_errno(status);
 937                 goto leave;
 938         }
 939
 940         if (OCFS2_I(inode)->ip_blkno != blkno) {
 941                 status = -ENOENT;
 942
 943                 trace_ocfs2_unlink_noent(
 944                                 (unsigned long long)OCFS2_I(inode)->ip_blkno,
 945                                 (unsigned long long)blkno,
 946                                 OCFS2_I(inode)->ip_flags);
 947                 goto leave;
 948         }
 949
 950         status = ocfs2_inode_lock(inode, &fe_bh, 1);
 951         if (status < 0) {
 952                 if (status != -ENOENT)
 953                         mlog_errno(status);
 954                 goto leave;
 955         }
 956         child_locked = 1;
 957
 958         if (S_ISDIR(inode->i_mode)) {
 959                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
 960                         status = -ENOTEMPTY;
 961                         goto leave;
 962                 }
 963         }
 964
 965         status = ocfs2_remote_dentry_delete(dentry);
 966         if (status < 0) {
 967                 /* This remote delete should succeed under all normal
 968                  * circumstances. */
 969                 mlog_errno(status);
 970                 goto leave;
 971         }
 972
 973         if (ocfs2_inode_is_unlinkable(inode)) {
 974                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
 975                                                   OCFS2_I(inode)->ip_blkno,
 976                                                   orphan_name, &orphan_insert,
 977                                                   false);
 978                 if (status < 0) {
 979                         mlog_errno(status);
 980                         goto leave;
 981                 }
 982                 is_unlinkable = true;
 983         }
 984
 985         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
 986         if (IS_ERR(handle)) {
 987                 status = PTR_ERR(handle);
 988                 handle = NULL;
 989                 mlog_errno(status);
 990                 goto leave;
 991         }
 992
 993         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
 994                                          OCFS2_JOURNAL_ACCESS_WRITE);
 995         if (status < 0) {
 996                 mlog_errno(status);
 997                 goto leave;
 998         }
 999
1000         fe = (struct ocfs2_dinode *) fe_bh->b_data;
1001
1002         /* delete the name from the parent dir */
1003         status = ocfs2_delete_entry(handle, dir, &lookup);
1004         if (status < 0) {
1005                 mlog_errno(status);
1006                 goto leave;
1007         }
1008
1009         if (S_ISDIR(inode->i_mode))
1010                 drop_nlink(inode);
1011         drop_nlink(inode);
1012         ocfs2_set_links_count(fe, inode->i_nlink);
1013         ocfs2_journal_dirty(handle, fe_bh);
1014
1015         dir->i_ctime = dir->i_mtime = CURRENT_TIME;
1016         if (S_ISDIR(inode->i_mode))
1017                 drop_nlink(dir);
1018
1019         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1020         if (status < 0) {
1021                 mlog_errno(status);
1022                 if (S_ISDIR(inode->i_mode))
1023                         inc_nlink(dir);
1024                 goto leave;
1025         }
1026
1027         if (is_unlinkable) {
1028                 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1029                                 orphan_name, &orphan_insert, orphan_dir, false);
1030                 if (status < 0)
1031                         mlog_errno(status);
1032         }
1033
1034 leave:
1035         if (handle)
1036                 ocfs2_commit_trans(osb, handle);
1037
1038         if (orphan_dir) {
1039                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1040                 ocfs2_inode_unlock(orphan_dir, 1);
1041                 mutex_unlock(&orphan_dir->i_mutex);
1042                 iput(orphan_dir);
1043         }
1044
1045         if (child_locked)
1046                 ocfs2_inode_unlock(inode, 1);
1047
1048         ocfs2_inode_unlock(dir, 1);
1049
1050         brelse(fe_bh);
1051         brelse(parent_node_bh);
1052
1053         ocfs2_free_dir_lookup_result(&orphan_insert);
1054         ocfs2_free_dir_lookup_result(&lookup);
1055
1056         if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1057                 mlog_errno(status);
1058
1059         return status;
1060 }
1061
1062 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1063                 u64 src_inode_no, u64 dest_inode_no)
1064 {
1065         int ret = 0, i = 0;
1066         u64 parent_inode_no = 0;
1067         u64 child_inode_no = src_inode_no;
1068         struct inode *child_inode;
1069
1070 #define MAX_LOOKUP_TIMES 32
1071         while (1) {
1072                 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1073                 if (IS_ERR(child_inode)) {
1074                         ret = PTR_ERR(child_inode);
1075                         break;
1076                 }
1077
1078                 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1079                 if (ret < 0) {
1080                         iput(child_inode);
1081                         if (ret != -ENOENT)
1082                                 mlog_errno(ret);
1083                         break;
1084                 }
1085
1086                 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1087                                 &parent_inode_no);
1088                 ocfs2_inode_unlock(child_inode, 0);
1089                 iput(child_inode);
1090                 if (ret < 0) {
1091                         ret = -ENOENT;
1092                         break;
1093                 }
1094
1095                 if (parent_inode_no == dest_inode_no) {
1096                         ret = 1;
1097                         break;
1098                 }
1099
1100                 if (parent_inode_no == osb->root_inode->i_ino) {
1101                         ret = 0;
1102                         break;
1103                 }
1104
1105                 child_inode_no = parent_inode_no;
1106
1107                 if (++i >= MAX_LOOKUP_TIMES) {
1108                         mlog(ML_NOTICE, "max lookup times reached, filesystem "
1109                                         "may have nested directories, "
1110                                         "src inode: %llu, dest inode: %llu.\n",
1111                                         (unsigned long long)src_inode_no,
1112                                         (unsigned long long)dest_inode_no);
1113                         ret = 0;
1114                         break;
1115                 }
1116         }
1117
1118         return ret;
1119 }
1120
1121 /*
1122  * The only place this should be used is rename and link!
1123  * if they have the same id, then the 1st one is the only one locked.
1124  */
1125 static int ocfs2_double_lock(struct ocfs2_super *osb,
1126                              struct buffer_head **bh1,
1127                              struct inode *inode1,
1128                              struct buffer_head **bh2,
1129                              struct inode *inode2,
1130                              int rename)
1131 {
1132         int status;
1133         int inode1_is_ancestor, inode2_is_ancestor;
1134         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1135         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1136
1137         trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1138                                 (unsigned long long)oi2->ip_blkno);
1139
1140         if (*bh1)
1141                 *bh1 = NULL;
1142         if (*bh2)
1143                 *bh2 = NULL;
1144
1145         /* we always want to lock the one with the lower lockid first.
1146          * and if they are nested, we lock ancestor first */
1147         if (oi1->ip_blkno != oi2->ip_blkno) {
1148                 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1149                                 oi1->ip_blkno);
1150                 if (inode1_is_ancestor < 0) {
1151                         status = inode1_is_ancestor;
1152                         goto bail;
1153                 }
1154
1155                 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1156                                 oi2->ip_blkno);
1157                 if (inode2_is_ancestor < 0) {
1158                         status = inode2_is_ancestor;
1159                         goto bail;
1160                 }
1161
1162                 if ((inode1_is_ancestor == 1) ||
1163                                 (oi1->ip_blkno < oi2->ip_blkno &&
1164                                 inode2_is_ancestor == 0)) {
1165                         /* switch id1 and id2 around */
1166                         swap(bh2, bh1);
1167                         swap(inode2, inode1);
1168                 }
1169                 /* lock id2 */
1170                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1171                                 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1172                 if (status < 0) {
1173                         if (status != -ENOENT)
1174                                 mlog_errno(status);
1175                         goto bail;
1176                 }
1177         }
1178
1179         /* lock id1 */
1180         status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1181                         rename == 1 ?  OI_LS_RENAME2 : OI_LS_PARENT);
1182         if (status < 0) {
1183                 /*
1184                  * An error return must mean that no cluster locks
1185                  * were held on function exit.
1186                  */
1187                 if (oi1->ip_blkno != oi2->ip_blkno) {
1188                         ocfs2_inode_unlock(inode2, 1);
1189                         brelse(*bh2);
1190                         *bh2 = NULL;
1191                 }
1192
1193                 if (status != -ENOENT)
1194                         mlog_errno(status);
1195         }
1196
1197         trace_ocfs2_double_lock_end(
1198                         (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1199                         (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1200
1201 bail:
1202         if (status)
1203                 mlog_errno(status);
1204         return status;
1205 }
1206
1207 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1208 {
1209         ocfs2_inode_unlock(inode1, 1);
1210
1211         if (inode1 != inode2)
1212                 ocfs2_inode_unlock(inode2, 1);
1213 }
1214
1215 static int ocfs2_rename(struct inode *old_dir,
1216                         struct dentry *old_dentry,
1217                         struct inode *new_dir,
1218                         struct dentry *new_dentry)
1219 {
1220         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1221         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1222         struct inode *old_inode = d_inode(old_dentry);
1223         struct inode *new_inode = d_inode(new_dentry);
1224         struct inode *orphan_dir = NULL;
1225         struct ocfs2_dinode *newfe = NULL;
1226         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1227         struct buffer_head *newfe_bh = NULL;
1228         struct buffer_head *old_inode_bh = NULL;
1229         struct ocfs2_super *osb = NULL;
1230         u64 newfe_blkno, old_de_ino;
1231         handle_t *handle = NULL;
1232         struct buffer_head *old_dir_bh = NULL;
1233         struct buffer_head *new_dir_bh = NULL;
1234         u32 old_dir_nlink = old_dir->i_nlink;
1235         struct ocfs2_dinode *old_di;
1236         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1237         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1238         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1239         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1240         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1241         bool should_add_orphan = false;
1242
1243         /* At some point it might be nice to break this function up a
1244          * bit. */
1245
1246         trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1247                            old_dentry->d_name.len, old_dentry->d_name.name,
1248                            new_dentry->d_name.len, new_dentry->d_name.name);
1249
1250         status = dquot_initialize(old_dir);
1251         if (status) {
1252                 mlog_errno(status);
1253                 goto bail;
1254         }
1255         status = dquot_initialize(new_dir);
1256         if (status) {
1257                 mlog_errno(status);
1258                 goto bail;
1259         }
1260
1261         osb = OCFS2_SB(old_dir->i_sb);
1262
1263         if (new_inode) {
1264                 if (!igrab(new_inode))
1265                         BUG();
1266         }
1267
1268         /* Assume a directory hierarchy thusly:
1269          * a/b/c
1270          * a/d
1271          * a,b,c, and d are all directories.
1272          *
1273          * from cwd of 'a' on both nodes:
1274          * node1: mv b/c d
1275          * node2: mv d   b/c
1276          *
1277          * And that's why, just like the VFS, we need a file system
1278          * rename lock. */
1279         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1280                 status = ocfs2_rename_lock(osb);
1281                 if (status < 0) {
1282                         mlog_errno(status);
1283                         goto bail;
1284                 }
1285                 rename_lock = 1;
1286
1287                 /* here we cannot guarantee the inodes haven't just been
1288                  * changed, so check if they are nested again */
1289                 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1290                                 old_inode->i_ino);
1291                 if (status < 0) {
1292                         mlog_errno(status);
1293                         goto bail;
1294                 } else if (status == 1) {
1295                         status = -EPERM;
1296                         trace_ocfs2_rename_not_permitted(
1297                                         (unsigned long long)old_inode->i_ino,
1298                                         (unsigned long long)new_dir->i_ino);
1299                         goto bail;
1300                 }
1301         }
1302
1303         /* if old and new are the same, this'll just do one lock. */
1304         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1305                                    &new_dir_bh, new_dir, 1);
1306         if (status < 0) {
1307                 mlog_errno(status);
1308                 goto bail;
1309         }
1310         parents_locked = 1;
1311
1312         if (!new_dir->i_nlink) {
1313                 status = -EACCES;
1314                 goto bail;
1315         }
1316
1317         /* make sure both dirs have bhs
1318          * get an extra ref on old_dir_bh if old==new */
1319         if (!new_dir_bh) {
1320                 if (old_dir_bh) {
1321                         new_dir_bh = old_dir_bh;
1322                         get_bh(new_dir_bh);
1323                 } else {
1324                         mlog(ML_ERROR, "no old_dir_bh!\n");
1325                         status = -EIO;
1326                         goto bail;
1327                 }
1328         }
1329
1330         /*
1331          * Aside from allowing a meta data update, the locking here
1332          * also ensures that the downconvert thread on other nodes
1333          * won't have to concurrently downconvert the inode and the
1334          * dentry locks.
1335          */
1336         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1337                                          OI_LS_PARENT);
1338         if (status < 0) {
1339                 if (status != -ENOENT)
1340                         mlog_errno(status);
1341                 goto bail;
1342         }
1343         old_child_locked = 1;
1344
1345         status = ocfs2_remote_dentry_delete(old_dentry);
1346         if (status < 0) {
1347                 mlog_errno(status);
1348                 goto bail;
1349         }
1350
1351         if (S_ISDIR(old_inode->i_mode)) {
1352                 u64 old_inode_parent;
1353
1354                 update_dot_dot = 1;
1355                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1356                                                   old_inode,
1357                                                   &old_inode_dot_dot_res);
1358                 if (status) {
1359                         status = -EIO;
1360                         goto bail;
1361                 }
1362
1363                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1364                         status = -EIO;
1365                         goto bail;
1366                 }
1367
1368                 if (!new_inode && new_dir != old_dir &&
1369                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1370                         status = -EMLINK;
1371                         goto bail;
1372                 }
1373         }
1374
1375         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1376                                             old_dentry->d_name.len,
1377                                             &old_de_ino);
1378         if (status) {
1379                 status = -ENOENT;
1380                 goto bail;
1381         }
1382
1383         /*
1384          *  Check for inode number is _not_ due to possible IO errors.
1385          *  We might rmdir the source, keep it as pwd of some process
1386          *  and merrily kill the link to whatever was created under the
1387          *  same name. Goodbye sticky bit ;-<
1388          */
1389         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1390                 status = -ENOENT;
1391                 goto bail;
1392         }
1393
1394         /* check if the target already exists (in which case we need
1395          * to delete it */
1396         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1397                                           new_dentry->d_name.len,
1398                                           &newfe_blkno, new_dir,
1399                                           &target_lookup_res);
1400         /* The only error we allow here is -ENOENT because the new
1401          * file not existing is perfectly valid. */
1402         if ((status < 0) && (status != -ENOENT)) {
1403                 /* If we cannot find the file specified we should just */
1404                 /* return the error... */
1405                 mlog_errno(status);
1406                 goto bail;
1407         }
1408         if (status == 0)
1409                 target_exists = 1;
1410
1411         if (!target_exists && new_inode) {
1412                 /*
1413                  * Target was unlinked by another node while we were
1414                  * waiting to get to ocfs2_rename(). There isn't
1415                  * anything we can do here to help the situation, so
1416                  * bubble up the appropriate error.
1417                  */
1418                 status = -ENOENT;
1419                 goto bail;
1420         }
1421
1422         /* In case we need to overwrite an existing file, we blow it
1423          * away first */
1424         if (target_exists) {
1425                 /* VFS didn't think there existed an inode here, but
1426                  * someone else in the cluster must have raced our
1427                  * rename to create one. Today we error cleanly, in
1428                  * the future we should consider calling iget to build
1429                  * a new struct inode for this entry. */
1430                 if (!new_inode) {
1431                         status = -EACCES;
1432
1433                         trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1434                                                 new_dentry->d_name.name);
1435                         goto bail;
1436                 }
1437
1438                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1439                         status = -EACCES;
1440
1441                         trace_ocfs2_rename_disagree(
1442                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1443                              (unsigned long long)newfe_blkno,
1444                              OCFS2_I(new_inode)->ip_flags);
1445                         goto bail;
1446                 }
1447
1448                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1449                 if (status < 0) {
1450                         if (status != -ENOENT)
1451                                 mlog_errno(status);
1452                         goto bail;
1453                 }
1454                 new_child_locked = 1;
1455
1456                 status = ocfs2_remote_dentry_delete(new_dentry);
1457                 if (status < 0) {
1458                         mlog_errno(status);
1459                         goto bail;
1460                 }
1461
1462                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1463
1464                 trace_ocfs2_rename_over_existing(
1465                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1466                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1467
1468                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1469                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1470                                                 OCFS2_I(new_inode)->ip_blkno,
1471                                                 orphan_name, &orphan_insert,
1472                                                 false);
1473                         if (status < 0) {
1474                                 mlog_errno(status);
1475                                 goto bail;
1476                         }
1477                         should_add_orphan = true;
1478                 }
1479         } else {
1480                 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1481
1482                 status = ocfs2_check_dir_for_entry(new_dir,
1483                                                    new_dentry->d_name.name,
1484                                                    new_dentry->d_name.len);
1485                 if (status)
1486                         goto bail;
1487
1488                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1489                                                       new_dentry->d_name.name,
1490                                                       new_dentry->d_name.len,
1491                                                       &target_insert);
1492                 if (status < 0) {
1493                         mlog_errno(status);
1494                         goto bail;
1495                 }
1496         }
1497
1498         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1499         if (IS_ERR(handle)) {
1500                 status = PTR_ERR(handle);
1501                 handle = NULL;
1502                 mlog_errno(status);
1503                 goto bail;
1504         }
1505
1506         if (target_exists) {
1507                 if (S_ISDIR(new_inode->i_mode)) {
1508                         if (new_inode->i_nlink != 2 ||
1509                             !ocfs2_empty_dir(new_inode)) {
1510                                 status = -ENOTEMPTY;
1511                                 goto bail;
1512                         }
1513                 }
1514                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1515                                                  newfe_bh,
1516                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1517                 if (status < 0) {
1518                         mlog_errno(status);
1519                         goto bail;
1520                 }
1521
1522                 /* change the dirent to point to the correct inode */
1523                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1524                                             old_inode);
1525                 if (status < 0) {
1526                         mlog_errno(status);
1527                         goto bail;
1528                 }
1529                 new_dir->i_version++;
1530
1531                 if (S_ISDIR(new_inode->i_mode))
1532                         ocfs2_set_links_count(newfe, 0);
1533                 else
1534                         ocfs2_add_links_count(newfe, -1);
1535                 ocfs2_journal_dirty(handle, newfe_bh);
1536                 if (should_add_orphan) {
1537                         status = ocfs2_orphan_add(osb, handle, new_inode,
1538                                         newfe_bh, orphan_name,
1539                                         &orphan_insert, orphan_dir, false);
1540                         if (status < 0) {
1541                                 mlog_errno(status);
1542                                 goto bail;
1543                         }
1544                 }
1545         } else {
1546                 /* if the name was not found in new_dir, add it now */
1547                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1548                                          OCFS2_I(old_inode)->ip_blkno,
1549                                          new_dir_bh, &target_insert);
1550         }
1551
1552         old_inode->i_ctime = CURRENT_TIME;
1553         mark_inode_dirty(old_inode);
1554
1555         status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1556                                          old_inode_bh,
1557                                          OCFS2_JOURNAL_ACCESS_WRITE);
1558         if (status >= 0) {
1559                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1560
1561                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1562                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1563                 ocfs2_journal_dirty(handle, old_inode_bh);
1564         } else
1565                 mlog_errno(status);
1566
1567         /*
1568          * Now that the name has been added to new_dir, remove the old name.
1569          *
1570          * We don't keep any directory entry context around until now
1571          * because the insert might have changed the type of directory
1572          * we're dealing with.
1573          */
1574         status = ocfs2_find_entry(old_dentry->d_name.name,
1575                                   old_dentry->d_name.len, old_dir,
1576                                   &old_entry_lookup);
1577         if (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         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1588         if (status < 0) {
1589                 mlog_errno(status);
1590                 if (!is_journal_aborted(osb->journal->j_journal)) {
1591                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1592                                         "is not deleted.",
1593                                         new_dentry->d_name.len, new_dentry->d_name.name,
1594                                         old_dentry->d_name.len, old_dentry->d_name.name);
1595                 }
1596                 goto bail;
1597         }
1598
1599         if (new_inode) {
1600                 drop_nlink(new_inode);
1601                 new_inode->i_ctime = CURRENT_TIME;
1602         }
1603         old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1604
1605         if (update_dot_dot) {
1606                 status = ocfs2_update_entry(old_inode, handle,
1607                                             &old_inode_dot_dot_res, new_dir);
1608                 drop_nlink(old_dir);
1609                 if (new_inode) {
1610                         drop_nlink(new_inode);
1611                 } else {
1612                         inc_nlink(new_dir);
1613                         mark_inode_dirty(new_dir);
1614                 }
1615         }
1616         mark_inode_dirty(old_dir);
1617         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1618         if (new_inode) {
1619                 mark_inode_dirty(new_inode);
1620                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1621         }
1622
1623         if (old_dir != new_dir) {
1624                 /* Keep the same times on both directories.*/
1625                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1626
1627                 /*
1628                  * This will also pick up the i_nlink change from the
1629                  * block above.
1630                  */
1631                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1632         }
1633
1634         if (old_dir_nlink != old_dir->i_nlink) {
1635                 if (!old_dir_bh) {
1636                         mlog(ML_ERROR, "need to change nlink for old dir "
1637                              "%llu from %d to %d but bh is NULL!\n",
1638                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1639                              (int)old_dir_nlink, old_dir->i_nlink);
1640                 } else {
1641                         struct ocfs2_dinode *fe;
1642                         status = ocfs2_journal_access_di(handle,
1643                                                          INODE_CACHE(old_dir),
1644                                                          old_dir_bh,
1645                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1646                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1647                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1648                         ocfs2_journal_dirty(handle, old_dir_bh);
1649                 }
1650         }
1651         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1652         status = 0;
1653 bail:
1654         if (handle)
1655                 ocfs2_commit_trans(osb, handle);
1656
1657         if (orphan_dir) {
1658                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1659                 ocfs2_inode_unlock(orphan_dir, 1);
1660                 mutex_unlock(&orphan_dir->i_mutex);
1661                 iput(orphan_dir);
1662         }
1663
1664         if (new_child_locked)
1665                 ocfs2_inode_unlock(new_inode, 1);
1666
1667         if (old_child_locked)
1668                 ocfs2_inode_unlock(old_inode, 1);
1669
1670         if (parents_locked)
1671                 ocfs2_double_unlock(old_dir, new_dir);
1672
1673         if (rename_lock)
1674                 ocfs2_rename_unlock(osb);
1675
1676         if (new_inode)
1677                 sync_mapping_buffers(old_inode->i_mapping);
1678
1679         if (new_inode)
1680                 iput(new_inode);
1681
1682         ocfs2_free_dir_lookup_result(&target_lookup_res);
1683         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1684         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1685         ocfs2_free_dir_lookup_result(&orphan_insert);
1686         ocfs2_free_dir_lookup_result(&target_insert);
1687
1688         brelse(newfe_bh);
1689         brelse(old_inode_bh);
1690         brelse(old_dir_bh);
1691         brelse(new_dir_bh);
1692
1693         if (status)
1694                 mlog_errno(status);
1695
1696         return status;
1697 }
1698
1699 /*
1700  * we expect i_size = strlen(symname). Copy symname into the file
1701  * data, including the null terminator.
1702  */
1703 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1704                                      handle_t *handle,
1705                                      struct inode *inode,
1706                                      const char *symname)
1707 {
1708         struct buffer_head **bhs = NULL;
1709         const char *c;
1710         struct super_block *sb = osb->sb;
1711         u64 p_blkno, p_blocks;
1712         int virtual, blocks, status, i, bytes_left;
1713
1714         bytes_left = i_size_read(inode) + 1;
1715         /* we can't trust i_blocks because we're actually going to
1716          * write i_size + 1 bytes. */
1717         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1718
1719         trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1720                                         i_size_read(inode), blocks);
1721
1722         /* Sanity check -- make sure we're going to fit. */
1723         if (bytes_left >
1724             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1725                 status = -EIO;
1726                 mlog_errno(status);
1727                 goto bail;
1728         }
1729
1730         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1731         if (!bhs) {
1732                 status = -ENOMEM;
1733                 mlog_errno(status);
1734                 goto bail;
1735         }
1736
1737         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1738                                              NULL);
1739         if (status < 0) {
1740                 mlog_errno(status);
1741                 goto bail;
1742         }
1743
1744         /* links can never be larger than one cluster so we know this
1745          * is all going to be contiguous, but do a sanity check
1746          * anyway. */
1747         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1748                 status = -EIO;
1749                 mlog_errno(status);
1750                 goto bail;
1751         }
1752
1753         virtual = 0;
1754         while(bytes_left > 0) {
1755                 c = &symname[virtual * sb->s_blocksize];
1756
1757                 bhs[virtual] = sb_getblk(sb, p_blkno);
1758                 if (!bhs[virtual]) {
1759                         status = -ENOMEM;
1760                         mlog_errno(status);
1761                         goto bail;
1762                 }
1763                 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1764                                               bhs[virtual]);
1765
1766                 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1767                                               bhs[virtual],
1768                                               OCFS2_JOURNAL_ACCESS_CREATE);
1769                 if (status < 0) {
1770                         mlog_errno(status);
1771                         goto bail;
1772                 }
1773
1774                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1775
1776                 memcpy(bhs[virtual]->b_data, c,
1777                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1778                        bytes_left);
1779
1780                 ocfs2_journal_dirty(handle, bhs[virtual]);
1781
1782                 virtual++;
1783                 p_blkno++;
1784                 bytes_left -= sb->s_blocksize;
1785         }
1786
1787         status = 0;
1788 bail:
1789
1790         if (bhs) {
1791                 for(i = 0; i < blocks; i++)
1792                         brelse(bhs[i]);
1793                 kfree(bhs);
1794         }
1795
1796         if (status)
1797                 mlog_errno(status);
1798         return status;
1799 }
1800
1801 static int ocfs2_symlink(struct inode *dir,
1802                          struct dentry *dentry,
1803                          const char *symname)
1804 {
1805         int status, l, credits;
1806         u64 newsize;
1807         struct ocfs2_super *osb = NULL;
1808         struct inode *inode = NULL;
1809         struct super_block *sb;
1810         struct buffer_head *new_fe_bh = NULL;
1811         struct buffer_head *parent_fe_bh = NULL;
1812         struct ocfs2_dinode *fe = NULL;
1813         struct ocfs2_dinode *dirfe;
1814         handle_t *handle = NULL;
1815         struct ocfs2_alloc_context *inode_ac = NULL;
1816         struct ocfs2_alloc_context *data_ac = NULL;
1817         struct ocfs2_alloc_context *xattr_ac = NULL;
1818         int want_clusters = 0;
1819         int xattr_credits = 0;
1820         struct ocfs2_security_xattr_info si = {
1821                 .enable = 1,
1822         };
1823         int did_quota = 0, did_quota_inode = 0;
1824         struct ocfs2_dir_lookup_result lookup = { NULL, };
1825         sigset_t oldset;
1826         int did_block_signals = 0;
1827         struct ocfs2_dentry_lock *dl = NULL;
1828
1829         trace_ocfs2_symlink_begin(dir, dentry, symname,
1830                                   dentry->d_name.len, dentry->d_name.name);
1831
1832         status = dquot_initialize(dir);
1833         if (status) {
1834                 mlog_errno(status);
1835                 goto bail;
1836         }
1837
1838         sb = dir->i_sb;
1839         osb = OCFS2_SB(sb);
1840
1841         l = strlen(symname) + 1;
1842
1843         credits = ocfs2_calc_symlink_credits(sb);
1844
1845         /* lock the parent directory */
1846         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1847         if (status < 0) {
1848                 if (status != -ENOENT)
1849                         mlog_errno(status);
1850                 return status;
1851         }
1852
1853         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1854         if (!ocfs2_read_links_count(dirfe)) {
1855                 /* can't make a file in a deleted directory. */
1856                 status = -ENOENT;
1857                 goto bail;
1858         }
1859
1860         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1861                                            dentry->d_name.len);
1862         if (status)
1863                 goto bail;
1864
1865         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1866                                               dentry->d_name.name,
1867                                               dentry->d_name.len, &lookup);
1868         if (status < 0) {
1869                 mlog_errno(status);
1870                 goto bail;
1871         }
1872
1873         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1874         if (status < 0) {
1875                 if (status != -ENOSPC)
1876                         mlog_errno(status);
1877                 goto bail;
1878         }
1879
1880         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1881         if (IS_ERR(inode)) {
1882                 status = PTR_ERR(inode);
1883                 inode = NULL;
1884                 mlog_errno(status);
1885                 goto bail;
1886         }
1887
1888         /* get security xattr */
1889         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1890         if (status) {
1891                 if (status == -EOPNOTSUPP)
1892                         si.enable = 0;
1893                 else {
1894                         mlog_errno(status);
1895                         goto bail;
1896                 }
1897         }
1898
1899         /* calculate meta data/clusters for setting security xattr */
1900         if (si.enable) {
1901                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1902                                                   &xattr_credits, &xattr_ac);
1903                 if (status < 0) {
1904                         mlog_errno(status);
1905                         goto bail;
1906                 }
1907         }
1908
1909         /* don't reserve bitmap space for fast symlinks. */
1910         if (l > ocfs2_fast_symlink_chars(sb))
1911                 want_clusters += 1;
1912
1913         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1914         if (status < 0) {
1915                 if (status != -ENOSPC)
1916                         mlog_errno(status);
1917                 goto bail;
1918         }
1919
1920         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1921         if (IS_ERR(handle)) {
1922                 status = PTR_ERR(handle);
1923                 handle = NULL;
1924                 mlog_errno(status);
1925                 goto bail;
1926         }
1927
1928         /* Starting to change things, restart is no longer possible. */
1929         ocfs2_block_signals(&oldset);
1930         did_block_signals = 1;
1931
1932         status = dquot_alloc_inode(inode);
1933         if (status)
1934                 goto bail;
1935         did_quota_inode = 1;
1936
1937         trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1938                                    dentry->d_name.name,
1939                                    (unsigned long long)OCFS2_I(dir)->ip_blkno,
1940                                    inode->i_mode);
1941
1942         status = ocfs2_mknod_locked(osb, dir, inode,
1943                                     0, &new_fe_bh, parent_fe_bh, handle,
1944                                     inode_ac);
1945         if (status < 0) {
1946                 mlog_errno(status);
1947                 goto bail;
1948         }
1949
1950         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1951         inode->i_rdev = 0;
1952         newsize = l - 1;
1953         inode->i_op = &ocfs2_symlink_inode_operations;
1954         if (l > ocfs2_fast_symlink_chars(sb)) {
1955                 u32 offset = 0;
1956
1957                 status = dquot_alloc_space_nodirty(inode,
1958                     ocfs2_clusters_to_bytes(osb->sb, 1));
1959                 if (status)
1960                         goto bail;
1961                 did_quota = 1;
1962                 inode->i_mapping->a_ops = &ocfs2_aops;
1963                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1964                                               new_fe_bh,
1965                                               handle, data_ac, NULL,
1966                                               NULL);
1967                 if (status < 0) {
1968                         if (status != -ENOSPC && status != -EINTR) {
1969                                 mlog(ML_ERROR,
1970                                      "Failed to extend file to %llu\n",
1971                                      (unsigned long long)newsize);
1972                                 mlog_errno(status);
1973                                 status = -ENOSPC;
1974                         }
1975                         goto bail;
1976                 }
1977                 i_size_write(inode, newsize);
1978                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1979         } else {
1980                 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1981                 memcpy((char *) fe->id2.i_symlink, symname, l);
1982                 i_size_write(inode, newsize);
1983                 inode->i_blocks = 0;
1984         }
1985
1986         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1987         if (status < 0) {
1988                 mlog_errno(status);
1989                 goto bail;
1990         }
1991
1992         if (!ocfs2_inode_is_fast_symlink(inode)) {
1993                 status = ocfs2_create_symlink_data(osb, handle, inode,
1994                                                    symname);
1995                 if (status < 0) {
1996                         mlog_errno(status);
1997                         goto bail;
1998                 }
1999         }
2000
2001         if (si.enable) {
2002                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
2003                                                  xattr_ac, data_ac);
2004                 if (status < 0) {
2005                         mlog_errno(status);
2006                         goto bail;
2007                 }
2008         }
2009
2010         /*
2011          * Do this before adding the entry to the directory. We add
2012          * also set d_op after success so that ->d_iput() will cleanup
2013          * the dentry lock even if ocfs2_add_entry() fails below.
2014          */
2015         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2016         if (status) {
2017                 mlog_errno(status);
2018                 goto bail;
2019         }
2020
2021         dl = dentry->d_fsdata;
2022
2023         status = ocfs2_add_entry(handle, dentry, inode,
2024                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
2025                                  &lookup);
2026         if (status < 0) {
2027                 mlog_errno(status);
2028                 goto bail;
2029         }
2030
2031         insert_inode_hash(inode);
2032         d_instantiate(dentry, inode);
2033 bail:
2034         if (status < 0 && did_quota)
2035                 dquot_free_space_nodirty(inode,
2036                                         ocfs2_clusters_to_bytes(osb->sb, 1));
2037         if (status < 0 && did_quota_inode)
2038                 dquot_free_inode(inode);
2039         if (handle)
2040                 ocfs2_commit_trans(osb, handle);
2041
2042         ocfs2_inode_unlock(dir, 1);
2043         if (did_block_signals)
2044                 ocfs2_unblock_signals(&oldset);
2045
2046         brelse(new_fe_bh);
2047         brelse(parent_fe_bh);
2048         kfree(si.value);
2049         ocfs2_free_dir_lookup_result(&lookup);
2050         if (inode_ac)
2051                 ocfs2_free_alloc_context(inode_ac);
2052         if (data_ac)
2053                 ocfs2_free_alloc_context(data_ac);
2054         if (xattr_ac)
2055                 ocfs2_free_alloc_context(xattr_ac);
2056         if ((status < 0) && inode) {
2057                 if (dl)
2058                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2059
2060                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2061                 clear_nlink(inode);
2062                 iput(inode);
2063         }
2064
2065         if (status)
2066                 mlog_errno(status);
2067
2068         return status;
2069 }
2070
2071 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2072 {
2073         int status, namelen;
2074
2075         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2076                            (long long)blkno);
2077         if (namelen <= 0) {
2078                 if (namelen)
2079                         status = namelen;
2080                 else
2081                         status = -EINVAL;
2082                 mlog_errno(status);
2083                 goto bail;
2084         }
2085         if (namelen != OCFS2_ORPHAN_NAMELEN) {
2086                 status = -EINVAL;
2087                 mlog_errno(status);
2088                 goto bail;
2089         }
2090
2091         trace_ocfs2_blkno_stringify(blkno, name, namelen);
2092
2093         status = 0;
2094 bail:
2095         if (status < 0)
2096                 mlog_errno(status);
2097         return status;
2098 }
2099
2100 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2101                                         struct inode **ret_orphan_dir,
2102                                         struct buffer_head **ret_orphan_dir_bh)
2103 {
2104         struct inode *orphan_dir_inode;
2105         struct buffer_head *orphan_dir_bh = NULL;
2106         int ret = 0;
2107
2108         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2109                                                        ORPHAN_DIR_SYSTEM_INODE,
2110                                                        osb->slot_num);
2111         if (!orphan_dir_inode) {
2112                 ret = -ENOENT;
2113                 mlog_errno(ret);
2114                 return ret;
2115         }
2116
2117         mutex_lock(&orphan_dir_inode->i_mutex);
2118
2119         ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2120         if (ret < 0) {
2121                 mutex_unlock(&orphan_dir_inode->i_mutex);
2122                 iput(orphan_dir_inode);
2123
2124                 mlog_errno(ret);
2125                 return ret;
2126         }
2127
2128         *ret_orphan_dir = orphan_dir_inode;
2129         *ret_orphan_dir_bh = orphan_dir_bh;
2130
2131         return 0;
2132 }
2133
2134 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2135                                       struct buffer_head *orphan_dir_bh,
2136                                       u64 blkno,
2137                                       char *name,
2138                                       struct ocfs2_dir_lookup_result *lookup,
2139                                       bool dio)
2140 {
2141         int ret;
2142         struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2143         int namelen = dio ?
2144                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2145                         OCFS2_ORPHAN_NAMELEN;
2146
2147         if (dio) {
2148                 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2149                                 OCFS2_DIO_ORPHAN_PREFIX);
2150                 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2151                         ret = -EINVAL;
2152                         mlog_errno(ret);
2153                         return ret;
2154                 }
2155
2156                 ret = ocfs2_blkno_stringify(blkno,
2157                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2158         } else
2159                 ret = ocfs2_blkno_stringify(blkno, name);
2160         if (ret < 0) {
2161                 mlog_errno(ret);
2162                 return ret;
2163         }
2164
2165         ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2166                                            orphan_dir_bh, name,
2167                                            namelen, lookup);
2168         if (ret < 0) {
2169                 mlog_errno(ret);
2170                 return ret;
2171         }
2172
2173         return 0;
2174 }
2175
2176 /**
2177  * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2178  * insertion of an orphan.
2179  * @osb: ocfs2 file system
2180  * @ret_orphan_dir: Orphan dir inode - returned locked!
2181  * @blkno: Actual block number of the inode to be inserted into orphan dir.
2182  * @lookup: dir lookup result, to be passed back into functions like
2183  *          ocfs2_orphan_add
2184  *
2185  * Returns zero on success and the ret_orphan_dir, name and lookup
2186  * fields will be populated.
2187  *
2188  * Returns non-zero on failure.
2189  */
2190 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2191                                     struct inode **ret_orphan_dir,
2192                                     u64 blkno,
2193                                     char *name,
2194                                     struct ocfs2_dir_lookup_result *lookup,
2195                                     bool dio)
2196 {
2197         struct inode *orphan_dir_inode = NULL;
2198         struct buffer_head *orphan_dir_bh = NULL;
2199         int ret = 0;
2200
2201         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2202                                            &orphan_dir_bh);
2203         if (ret < 0) {
2204                 mlog_errno(ret);
2205                 return ret;
2206         }
2207
2208         ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2209                                          blkno, name, lookup, dio);
2210         if (ret < 0) {
2211                 mlog_errno(ret);
2212                 goto out;
2213         }
2214
2215         *ret_orphan_dir = orphan_dir_inode;
2216
2217 out:
2218         brelse(orphan_dir_bh);
2219
2220         if (ret) {
2221                 ocfs2_inode_unlock(orphan_dir_inode, 1);
2222                 mutex_unlock(&orphan_dir_inode->i_mutex);
2223                 iput(orphan_dir_inode);
2224         }
2225
2226         if (ret)
2227                 mlog_errno(ret);
2228         return ret;
2229 }
2230
2231 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2232                             handle_t *handle,
2233                             struct inode *inode,
2234                             struct buffer_head *fe_bh,
2235                             char *name,
2236                             struct ocfs2_dir_lookup_result *lookup,
2237                             struct inode *orphan_dir_inode,
2238                             bool dio)
2239 {
2240         struct buffer_head *orphan_dir_bh = NULL;
2241         int status = 0;
2242         struct ocfs2_dinode *orphan_fe;
2243         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2244         int namelen = dio ?
2245                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2246                         OCFS2_ORPHAN_NAMELEN;
2247
2248         trace_ocfs2_orphan_add_begin(
2249                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2250
2251         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2252         if (status < 0) {
2253                 mlog_errno(status);
2254                 goto leave;
2255         }
2256
2257         status = ocfs2_journal_access_di(handle,
2258                                          INODE_CACHE(orphan_dir_inode),
2259                                          orphan_dir_bh,
2260                                          OCFS2_JOURNAL_ACCESS_WRITE);
2261         if (status < 0) {
2262                 mlog_errno(status);
2263                 goto leave;
2264         }
2265
2266         /*
2267          * We're going to journal the change of i_flags and i_orphaned_slot.
2268          * It's safe anyway, though some callers may duplicate the journaling.
2269          * Journaling within the func just make the logic look more
2270          * straightforward.
2271          */
2272         status = ocfs2_journal_access_di(handle,
2273                                          INODE_CACHE(inode),
2274                                          fe_bh,
2275                                          OCFS2_JOURNAL_ACCESS_WRITE);
2276         if (status < 0) {
2277                 mlog_errno(status);
2278                 goto leave;
2279         }
2280
2281         /* we're a cluster, and nlink can change on disk from
2282          * underneath us... */
2283         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2284         if (S_ISDIR(inode->i_mode))
2285                 ocfs2_add_links_count(orphan_fe, 1);
2286         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2287         ocfs2_journal_dirty(handle, orphan_dir_bh);
2288
2289         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2290                                    namelen, inode,
2291                                    OCFS2_I(inode)->ip_blkno,
2292                                    orphan_dir_bh, lookup);
2293         if (status < 0) {
2294                 mlog_errno(status);
2295                 goto rollback;
2296         }
2297
2298         if (dio) {
2299                 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2300                  * slot.
2301                  */
2302                 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2303                 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2304         } else {
2305                 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2306                 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2307
2308                 /* Record which orphan dir our inode now resides
2309                  * in. delete_inode will use this to determine which orphan
2310                  * dir to lock. */
2311                 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2312         }
2313
2314         ocfs2_journal_dirty(handle, fe_bh);
2315
2316         trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2317                                    osb->slot_num);
2318
2319 rollback:
2320         if (status < 0) {
2321                 if (S_ISDIR(inode->i_mode))
2322                         ocfs2_add_links_count(orphan_fe, -1);
2323                 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2324         }
2325
2326 leave:
2327         brelse(orphan_dir_bh);
2328
2329         return status;
2330 }
2331
2332 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2333 int ocfs2_orphan_del(struct ocfs2_super *osb,
2334                      handle_t *handle,
2335                      struct inode *orphan_dir_inode,
2336                      struct inode *inode,
2337                      struct buffer_head *orphan_dir_bh,
2338                      bool dio)
2339 {
2340         const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN;
2341         char name[namelen + 1];
2342         struct ocfs2_dinode *orphan_fe;
2343         int status = 0;
2344         struct ocfs2_dir_lookup_result lookup = { NULL, };
2345
2346         if (dio) {
2347                 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2348                                 OCFS2_DIO_ORPHAN_PREFIX);
2349                 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2350                         status = -EINVAL;
2351                         mlog_errno(status);
2352                         return status;
2353                 }
2354
2355                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2356                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2357         } else
2358                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2359         if (status < 0) {
2360                 mlog_errno(status);
2361                 goto leave;
2362         }
2363
2364         trace_ocfs2_orphan_del(
2365              (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2366              name, strlen(name));
2367
2368         /* find it's spot in the orphan directory */
2369         status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2370                                   &lookup);
2371         if (status) {
2372                 mlog_errno(status);
2373                 goto leave;
2374         }
2375
2376         /* remove it from the orphan directory */
2377         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2378         if (status < 0) {
2379                 mlog_errno(status);
2380                 goto leave;
2381         }
2382
2383         status = ocfs2_journal_access_di(handle,
2384                                          INODE_CACHE(orphan_dir_inode),
2385                                          orphan_dir_bh,
2386                                          OCFS2_JOURNAL_ACCESS_WRITE);
2387         if (status < 0) {
2388                 mlog_errno(status);
2389                 goto leave;
2390         }
2391
2392         /* do the i_nlink dance! :) */
2393         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2394         if (S_ISDIR(inode->i_mode))
2395                 ocfs2_add_links_count(orphan_fe, -1);
2396         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2397         ocfs2_journal_dirty(handle, orphan_dir_bh);
2398
2399 leave:
2400         ocfs2_free_dir_lookup_result(&lookup);
2401
2402         if (status)
2403                 mlog_errno(status);
2404         return status;
2405 }
2406
2407 /**
2408  * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2409  * allocated file. This is different from the typical 'add to orphan dir'
2410  * operation in that the inode does not yet exist. This is a problem because
2411  * the orphan dir stringifies the inode block number to come up with it's
2412  * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2413  * problem. This function works around it by calling deeper into the orphan
2414  * and suballoc code than other callers. Use this only by necessity.
2415  * @dir: The directory which this inode will ultimately wind up under - not the
2416  * orphan dir!
2417  * @dir_bh: buffer_head the @dir inode block
2418  * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2419  * with the string to be used for orphan dirent. Pass back to the orphan dir
2420  * code.
2421  * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2422  * dir code.
2423  * @ret_di_blkno: block number where the new inode will be allocated.
2424  * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2425  * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2426  *
2427  * Returns zero on success and the ret_orphan_dir, name and lookup
2428  * fields will be populated.
2429  *
2430  * Returns non-zero on failure.
2431  */
2432 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2433                                         struct buffer_head *dir_bh,
2434                                         char *orphan_name,
2435                                         struct inode **ret_orphan_dir,
2436                                         u64 *ret_di_blkno,
2437                                         struct ocfs2_dir_lookup_result *orphan_insert,
2438                                         struct ocfs2_alloc_context **ret_inode_ac)
2439 {
2440         int ret;
2441         u64 di_blkno;
2442         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2443         struct inode *orphan_dir = NULL;
2444         struct buffer_head *orphan_dir_bh = NULL;
2445         struct ocfs2_alloc_context *inode_ac = NULL;
2446
2447         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2448         if (ret < 0) {
2449                 mlog_errno(ret);
2450                 return ret;
2451         }
2452
2453         /* reserve an inode spot */
2454         ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2455         if (ret < 0) {
2456                 if (ret != -ENOSPC)
2457                         mlog_errno(ret);
2458                 goto out;
2459         }
2460
2461         ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2462                                        &di_blkno);
2463         if (ret) {
2464                 mlog_errno(ret);
2465                 goto out;
2466         }
2467
2468         ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2469                                          di_blkno, orphan_name, orphan_insert,
2470                                          false);
2471         if (ret < 0) {
2472                 mlog_errno(ret);
2473                 goto out;
2474         }
2475
2476 out:
2477         if (ret == 0) {
2478                 *ret_orphan_dir = orphan_dir;
2479                 *ret_di_blkno = di_blkno;
2480                 *ret_inode_ac = inode_ac;
2481                 /*
2482                  * orphan_name and orphan_insert are already up to
2483                  * date via prepare_orphan_dir
2484                  */
2485         } else {
2486                 /* Unroll reserve_new_inode* */
2487                 if (inode_ac)
2488                         ocfs2_free_alloc_context(inode_ac);
2489
2490                 /* Unroll orphan dir locking */
2491                 mutex_unlock(&orphan_dir->i_mutex);
2492                 ocfs2_inode_unlock(orphan_dir, 1);
2493                 iput(orphan_dir);
2494         }
2495
2496         brelse(orphan_dir_bh);
2497
2498         return ret;
2499 }
2500
2501 int ocfs2_create_inode_in_orphan(struct inode *dir,
2502                                  int mode,
2503                                  struct inode **new_inode)
2504 {
2505         int status, did_quota_inode = 0;
2506         struct inode *inode = NULL;
2507         struct inode *orphan_dir = NULL;
2508         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2509         struct ocfs2_dinode *di = NULL;
2510         handle_t *handle = NULL;
2511         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2512         struct buffer_head *parent_di_bh = NULL;
2513         struct buffer_head *new_di_bh = NULL;
2514         struct ocfs2_alloc_context *inode_ac = NULL;
2515         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2516         u64 uninitialized_var(di_blkno), suballoc_loc;
2517         u16 suballoc_bit;
2518
2519         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2520         if (status < 0) {
2521                 if (status != -ENOENT)
2522                         mlog_errno(status);
2523                 return status;
2524         }
2525
2526         status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2527                                               orphan_name, &orphan_dir,
2528                                               &di_blkno, &orphan_insert, &inode_ac);
2529         if (status < 0) {
2530                 if (status != -ENOSPC)
2531                         mlog_errno(status);
2532                 goto leave;
2533         }
2534
2535         inode = ocfs2_get_init_inode(dir, mode);
2536         if (IS_ERR(inode)) {
2537                 status = PTR_ERR(inode);
2538                 inode = NULL;
2539                 mlog_errno(status);
2540                 goto leave;
2541         }
2542
2543         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2544         if (IS_ERR(handle)) {
2545                 status = PTR_ERR(handle);
2546                 handle = NULL;
2547                 mlog_errno(status);
2548                 goto leave;
2549         }
2550
2551         status = dquot_alloc_inode(inode);
2552         if (status)
2553                 goto leave;
2554         did_quota_inode = 1;
2555
2556         status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2557                                               &suballoc_loc,
2558                                               &suballoc_bit, di_blkno);
2559         if (status < 0) {
2560                 mlog_errno(status);
2561                 goto leave;
2562         }
2563
2564         clear_nlink(inode);
2565         /* do the real work now. */
2566         status = __ocfs2_mknod_locked(dir, inode,
2567                                       0, &new_di_bh, parent_di_bh, handle,
2568                                       inode_ac, di_blkno, suballoc_loc,
2569                                       suballoc_bit);
2570         if (status < 0) {
2571                 mlog_errno(status);
2572                 goto leave;
2573         }
2574
2575         di = (struct ocfs2_dinode *)new_di_bh->b_data;
2576         status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2577                                   &orphan_insert, orphan_dir, false);
2578         if (status < 0) {
2579                 mlog_errno(status);
2580                 goto leave;
2581         }
2582
2583         /* get open lock so that only nodes can't remove it from orphan dir. */
2584         status = ocfs2_open_lock(inode);
2585         if (status < 0)
2586                 mlog_errno(status);
2587
2588         insert_inode_hash(inode);
2589 leave:
2590         if (status < 0 && did_quota_inode)
2591                 dquot_free_inode(inode);
2592         if (handle)
2593                 ocfs2_commit_trans(osb, handle);
2594
2595         if (orphan_dir) {
2596                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2597                 ocfs2_inode_unlock(orphan_dir, 1);
2598                 mutex_unlock(&orphan_dir->i_mutex);
2599                 iput(orphan_dir);
2600         }
2601
2602         if ((status < 0) && inode) {
2603                 clear_nlink(inode);
2604                 iput(inode);
2605         }
2606
2607         if (inode_ac)
2608                 ocfs2_free_alloc_context(inode_ac);
2609
2610         brelse(new_di_bh);
2611
2612         if (!status)
2613                 *new_inode = inode;
2614
2615         ocfs2_free_dir_lookup_result(&orphan_insert);
2616
2617         ocfs2_inode_unlock(dir, 1);
2618         brelse(parent_di_bh);
2619         return status;
2620 }
2621
2622 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2623         struct inode *inode)
2624 {
2625         char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2626         struct inode *orphan_dir_inode = NULL;
2627         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2628         struct buffer_head *di_bh = NULL;
2629         int status = 0;
2630         handle_t *handle = NULL;
2631         struct ocfs2_dinode *di = NULL;
2632
2633         status = ocfs2_inode_lock(inode, &di_bh, 1);
2634         if (status < 0) {
2635                 mlog_errno(status);
2636                 goto bail;
2637         }
2638
2639         di = (struct ocfs2_dinode *) di_bh->b_data;
2640         /*
2641          * Another append dio crashed?
2642          * If so, manually recover it first.
2643          */
2644         if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2645                 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2646                 if (status < 0) {
2647                         if (status != -ENOSPC)
2648                                 mlog_errno(status);
2649                         goto bail_unlock_inode;
2650                 }
2651
2652                 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2653                 if (status < 0) {
2654                         mlog_errno(status);
2655                         goto bail_unlock_inode;
2656                 }
2657         }
2658
2659         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2660                         OCFS2_I(inode)->ip_blkno,
2661                         orphan_name,
2662                         &orphan_insert,
2663                         true);
2664         if (status < 0) {
2665                 mlog_errno(status);
2666                 goto bail_unlock_inode;
2667         }
2668
2669         handle = ocfs2_start_trans(osb,
2670                         OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2671         if (IS_ERR(handle)) {
2672                 status = PTR_ERR(handle);
2673                 goto bail_unlock_orphan;
2674         }
2675
2676         status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2677                         &orphan_insert, orphan_dir_inode, true);
2678         if (status)
2679                 mlog_errno(status);
2680
2681         ocfs2_commit_trans(osb, handle);
2682
2683 bail_unlock_orphan:
2684         ocfs2_inode_unlock(orphan_dir_inode, 1);
2685         mutex_unlock(&orphan_dir_inode->i_mutex);
2686         iput(orphan_dir_inode);
2687
2688         ocfs2_free_dir_lookup_result(&orphan_insert);
2689
2690 bail_unlock_inode:
2691         ocfs2_inode_unlock(inode, 1);
2692         brelse(di_bh);
2693
2694 bail:
2695         return status;
2696 }
2697
2698 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2699                 struct inode *inode, struct buffer_head *di_bh,
2700                 int update_isize, loff_t end)
2701 {
2702         struct inode *orphan_dir_inode = NULL;
2703         struct buffer_head *orphan_dir_bh = NULL;
2704         struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2705         handle_t *handle = NULL;
2706         int status = 0;
2707
2708         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2709                         ORPHAN_DIR_SYSTEM_INODE,
2710                         le16_to_cpu(di->i_dio_orphaned_slot));
2711         if (!orphan_dir_inode) {
2712                 status = -ENOENT;
2713                 mlog_errno(status);
2714                 goto bail;
2715         }
2716
2717         mutex_lock(&orphan_dir_inode->i_mutex);
2718         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2719         if (status < 0) {
2720                 mutex_unlock(&orphan_dir_inode->i_mutex);
2721                 iput(orphan_dir_inode);
2722                 mlog_errno(status);
2723                 goto bail;
2724         }
2725
2726         handle = ocfs2_start_trans(osb,
2727                         OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2728         if (IS_ERR(handle)) {
2729                 status = PTR_ERR(handle);
2730                 goto bail_unlock_orphan;
2731         }
2732
2733         BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2734
2735         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2736                                 inode, orphan_dir_bh, true);
2737         if (status < 0) {
2738                 mlog_errno(status);
2739                 goto bail_commit;
2740         }
2741
2742         status = ocfs2_journal_access_di(handle,
2743                         INODE_CACHE(inode),
2744                         di_bh,
2745                         OCFS2_JOURNAL_ACCESS_WRITE);
2746         if (status < 0) {
2747                 mlog_errno(status);
2748                 goto bail_commit;
2749         }
2750
2751         di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2752         di->i_dio_orphaned_slot = 0;
2753
2754         if (update_isize) {
2755                 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2756                 if (status)
2757                         mlog_errno(status);
2758         } else
2759                 ocfs2_journal_dirty(handle, di_bh);
2760
2761 bail_commit:
2762         ocfs2_commit_trans(osb, handle);
2763
2764 bail_unlock_orphan:
2765         ocfs2_inode_unlock(orphan_dir_inode, 1);
2766         mutex_unlock(&orphan_dir_inode->i_mutex);
2767         brelse(orphan_dir_bh);
2768         iput(orphan_dir_inode);
2769
2770 bail:
2771         return status;
2772 }
2773
2774 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2775                                    struct inode *inode,
2776                                    struct dentry *dentry)
2777 {
2778         int status = 0;
2779         struct buffer_head *parent_di_bh = NULL;
2780         handle_t *handle = NULL;
2781         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2782         struct ocfs2_dinode *dir_di, *di;
2783         struct inode *orphan_dir_inode = NULL;
2784         struct buffer_head *orphan_dir_bh = NULL;
2785         struct buffer_head *di_bh = NULL;
2786         struct ocfs2_dir_lookup_result lookup = { NULL, };
2787
2788         trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2789                                 dentry->d_name.len, dentry->d_name.name,
2790                                 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2791                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2792
2793         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2794         if (status < 0) {
2795                 if (status != -ENOENT)
2796                         mlog_errno(status);
2797                 return status;
2798         }
2799
2800         dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2801         if (!dir_di->i_links_count) {
2802                 /* can't make a file in a deleted directory. */
2803                 status = -ENOENT;
2804                 goto leave;
2805         }
2806
2807         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2808                                            dentry->d_name.len);
2809         if (status)
2810                 goto leave;
2811
2812         /* get a spot inside the dir. */
2813         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2814                                               dentry->d_name.name,
2815                                               dentry->d_name.len, &lookup);
2816         if (status < 0) {
2817                 mlog_errno(status);
2818                 goto leave;
2819         }
2820
2821         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2822                                                        ORPHAN_DIR_SYSTEM_INODE,
2823                                                        osb->slot_num);
2824         if (!orphan_dir_inode) {
2825                 status = -ENOENT;
2826                 mlog_errno(status);
2827                 goto leave;
2828         }
2829
2830         mutex_lock(&orphan_dir_inode->i_mutex);
2831
2832         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2833         if (status < 0) {
2834                 mlog_errno(status);
2835                 mutex_unlock(&orphan_dir_inode->i_mutex);
2836                 iput(orphan_dir_inode);
2837                 goto leave;
2838         }
2839
2840         status = ocfs2_read_inode_block(inode, &di_bh);
2841         if (status < 0) {
2842                 mlog_errno(status);
2843                 goto orphan_unlock;
2844         }
2845
2846         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2847         if (IS_ERR(handle)) {
2848                 status = PTR_ERR(handle);
2849                 handle = NULL;
2850                 mlog_errno(status);
2851                 goto orphan_unlock;
2852         }
2853
2854         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2855                                          di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2856         if (status < 0) {
2857                 mlog_errno(status);
2858                 goto out_commit;
2859         }
2860
2861         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2862                                   orphan_dir_bh, false);
2863         if (status < 0) {
2864                 mlog_errno(status);
2865                 goto out_commit;
2866         }
2867
2868         di = (struct ocfs2_dinode *)di_bh->b_data;
2869         di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2870         di->i_orphaned_slot = 0;
2871         set_nlink(inode, 1);
2872         ocfs2_set_links_count(di, inode->i_nlink);
2873         ocfs2_update_inode_fsync_trans(handle, inode, 1);
2874         ocfs2_journal_dirty(handle, di_bh);
2875
2876         status = ocfs2_add_entry(handle, dentry, inode,
2877                                  OCFS2_I(inode)->ip_blkno, parent_di_bh,
2878                                  &lookup);
2879         if (status < 0) {
2880                 mlog_errno(status);
2881                 goto out_commit;
2882         }
2883
2884         status = ocfs2_dentry_attach_lock(dentry, inode,
2885                                           OCFS2_I(dir)->ip_blkno);
2886         if (status) {
2887                 mlog_errno(status);
2888                 goto out_commit;
2889         }
2890
2891         d_instantiate(dentry, inode);
2892         status = 0;
2893 out_commit:
2894         ocfs2_commit_trans(osb, handle);
2895 orphan_unlock:
2896         ocfs2_inode_unlock(orphan_dir_inode, 1);
2897         mutex_unlock(&orphan_dir_inode->i_mutex);
2898         iput(orphan_dir_inode);
2899 leave:
2900
2901         ocfs2_inode_unlock(dir, 1);
2902
2903         brelse(di_bh);
2904         brelse(parent_di_bh);
2905         brelse(orphan_dir_bh);
2906
2907         ocfs2_free_dir_lookup_result(&lookup);
2908
2909         if (status)
2910                 mlog_errno(status);
2911
2912         return status;
2913 }
2914
2915 const struct inode_operations ocfs2_dir_iops = {
2916         .create         = ocfs2_create,
2917         .lookup         = ocfs2_lookup,
2918         .link           = ocfs2_link,
2919         .unlink         = ocfs2_unlink,
2920         .rmdir          = ocfs2_unlink,
2921         .symlink        = ocfs2_symlink,
2922         .mkdir          = ocfs2_mkdir,
2923         .mknod          = ocfs2_mknod,
2924         .rename         = ocfs2_rename,
2925         .setattr        = ocfs2_setattr,
2926         .getattr        = ocfs2_getattr,
2927         .permission     = ocfs2_permission,
2928         .setxattr       = generic_setxattr,
2929         .getxattr       = generic_getxattr,
2930         .listxattr      = ocfs2_listxattr,
2931         .removexattr    = generic_removexattr,
2932         .fiemap         = ocfs2_fiemap,
2933         .get_acl        = ocfs2_iop_get_acl,
2934         .set_acl        = ocfs2_iop_set_acl,
2935 };