git.oblomov.eu Git - linux-2.6/blob - 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
  44 #define MLOG_MASK_PREFIX ML_NAMEI
  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
  65 #include "buffer_head_io.h"
  66
  67 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
  68                               struct inode *dir,
  69                               struct inode *inode,
  70                               struct dentry *dentry,
  71                               dev_t dev,
  72                               struct buffer_head **new_fe_bh,
  73                               struct buffer_head *parent_fe_bh,
  74                               handle_t *handle,
  75                               struct ocfs2_alloc_context *inode_ac);
  76
  77 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
  78                                     struct inode **ret_orphan_dir,
  79                                     struct inode *inode,
  80                                     char *name,
  81                                     struct buffer_head **de_bh);
  82
  83 static int ocfs2_orphan_add(struct ocfs2_super *osb,
  84                             handle_t *handle,
  85                             struct inode *inode,
  86                             struct ocfs2_dinode *fe,
  87                             char *name,
  88                             struct buffer_head *de_bh,
  89                             struct inode *orphan_dir_inode);
  90
  91 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
  92                                      handle_t *handle,
  93                                      struct inode *inode,
  94                                      const char *symname);
  95
  96 /* An orphan dir name is an 8 byte value, printed as a hex string */
  97 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
  98
  99 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
 100                                    struct nameidata *nd)
 101 {
 102         int status;
 103         u64 blkno;
 104         struct inode *inode = NULL;
 105         struct dentry *ret;
 106         struct ocfs2_inode_info *oi;
 107
 108         mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
 109                    dentry->d_name.len, dentry->d_name.name);
 110
 111         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
 112                 ret = ERR_PTR(-ENAMETOOLONG);
 113                 goto bail;
 114         }
 115
 116         mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len,
 117              dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno);
 118
 119         status = ocfs2_inode_lock(dir, NULL, 0);
 120         if (status < 0) {
 121                 if (status != -ENOENT)
 122                         mlog_errno(status);
 123                 ret = ERR_PTR(status);
 124                 goto bail;
 125         }
 126
 127         status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
 128                                             dentry->d_name.len, &blkno);
 129         if (status < 0)
 130                 goto bail_add;
 131
 132         inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
 133         if (IS_ERR(inode)) {
 134                 ret = ERR_PTR(-EACCES);
 135                 goto bail_unlock;
 136         }
 137
 138         oi = OCFS2_I(inode);
 139         /* Clear any orphaned state... If we were able to look up the
 140          * inode from a directory, it certainly can't be orphaned. We
 141          * might have the bad state from a node which intended to
 142          * orphan this inode but crashed before it could commit the
 143          * unlink. */
 144         spin_lock(&oi->ip_lock);
 145         oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
 146         spin_unlock(&oi->ip_lock);
 147
 148 bail_add:
 149         dentry->d_op = &ocfs2_dentry_ops;
 150         ret = d_splice_alias(inode, dentry);
 151
 152         if (inode) {
 153                 /*
 154                  * If d_splice_alias() finds a DCACHE_DISCONNECTED
 155                  * dentry, it will d_move() it on top of ourse. The
 156                  * return value will indicate this however, so in
 157                  * those cases, we switch them around for the locking
 158                  * code.
 159                  *
 160                  * NOTE: This dentry already has ->d_op set from
 161                  * ocfs2_get_parent() and ocfs2_get_dentry()
 162                  */
 163                 if (ret)
 164                         dentry = ret;
 165
 166                 status = ocfs2_dentry_attach_lock(dentry, inode,
 167                                                   OCFS2_I(dir)->ip_blkno);
 168                 if (status) {
 169                         mlog_errno(status);
 170                         ret = ERR_PTR(status);
 171                         goto bail_unlock;
 172                 }
 173         }
 174
 175 bail_unlock:
 176         /* Don't drop the cluster lock until *after* the d_add --
 177          * unlink on another node will message us to remove that
 178          * dentry under this lock so otherwise we can race this with
 179          * the downconvert thread and have a stale dentry. */
 180         ocfs2_inode_unlock(dir, 0);
 181
 182 bail:
 183
 184         mlog_exit_ptr(ret);
 185
 186         return ret;
 187 }
 188
 189 static struct inode *ocfs2_get_init_inode(struct inode *dir, int mode)
 190 {
 191         struct inode *inode;
 192
 193         inode = new_inode(dir->i_sb);
 194         if (!inode) {
 195                 mlog(ML_ERROR, "new_inode failed!\n");
 196                 return NULL;
 197         }
 198
 199         /* populate as many fields early on as possible - many of
 200          * these are used by the support functions here and in
 201          * callers. */
 202         if (S_ISDIR(mode))
 203                 inode->i_nlink = 2;
 204         else
 205                 inode->i_nlink = 1;
 206         inode->i_uid = current_fsuid();
 207         if (dir->i_mode & S_ISGID) {
 208                 inode->i_gid = dir->i_gid;
 209                 if (S_ISDIR(mode))
 210                         mode |= S_ISGID;
 211         } else
 212                 inode->i_gid = current_fsgid();
 213         inode->i_mode = mode;
 214         return inode;
 215 }
 216
 217 static int ocfs2_mknod(struct inode *dir,
 218                        struct dentry *dentry,
 219                        int mode,
 220                        dev_t dev)
 221 {
 222         int status = 0;
 223         struct buffer_head *parent_fe_bh = NULL;
 224         handle_t *handle = NULL;
 225         struct ocfs2_super *osb;
 226         struct ocfs2_dinode *dirfe;
 227         struct buffer_head *new_fe_bh = NULL;
 228         struct buffer_head *de_bh = NULL;
 229         struct inode *inode = NULL;
 230         struct ocfs2_alloc_context *inode_ac = NULL;
 231         struct ocfs2_alloc_context *data_ac = NULL;
 232         struct ocfs2_alloc_context *xattr_ac = NULL;
 233         int want_clusters = 0;
 234         int xattr_credits = 0;
 235         struct ocfs2_security_xattr_info si = {
 236                 .enable = 1,
 237         };
 238
 239         mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
 240                    (unsigned long)dev, dentry->d_name.len,
 241                    dentry->d_name.name);
 242
 243         /* get our super block */
 244         osb = OCFS2_SB(dir->i_sb);
 245
 246         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
 247         if (status < 0) {
 248                 if (status != -ENOENT)
 249                         mlog_errno(status);
 250                 return status;
 251         }
 252
 253         if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) {
 254                 status = -EMLINK;
 255                 goto leave;
 256         }
 257
 258         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
 259         if (!dirfe->i_links_count) {
 260                 /* can't make a file in a deleted directory. */
 261                 status = -ENOENT;
 262                 goto leave;
 263         }
 264
 265         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 266                                            dentry->d_name.len);
 267         if (status)
 268                 goto leave;
 269
 270         /* get a spot inside the dir. */
 271         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 272                                               dentry->d_name.name,
 273                                               dentry->d_name.len, &de_bh);
 274         if (status < 0) {
 275                 mlog_errno(status);
 276                 goto leave;
 277         }
 278
 279         /* reserve an inode spot */
 280         status = ocfs2_reserve_new_inode(osb, &inode_ac);
 281         if (status < 0) {
 282                 if (status != -ENOSPC)
 283                         mlog_errno(status);
 284                 goto leave;
 285         }
 286
 287         inode = ocfs2_get_init_inode(dir, mode);
 288         if (!inode) {
 289                 status = -ENOMEM;
 290                 mlog_errno(status);
 291                 goto leave;
 292         }
 293
 294         /* get security xattr */
 295         status = ocfs2_init_security_get(inode, dir, &si);
 296         if (status) {
 297                 if (status == -EOPNOTSUPP)
 298                         si.enable = 0;
 299                 else {
 300                         mlog_errno(status);
 301                         goto leave;
 302                 }
 303         }
 304
 305         /* calculate meta data/clusters for setting security xattr */
 306         if (si.enable) {
 307                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
 308                                                   &xattr_credits, &xattr_ac);
 309                 if (status < 0) {
 310                         mlog_errno(status);
 311                         goto leave;
 312                 }
 313         }
 314
 315         /* Reserve a cluster if creating an extent based directory. */
 316         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb))
 317                 want_clusters += 1;
 318
 319         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
 320         if (status < 0) {
 321                 if (status != -ENOSPC)
 322                         mlog_errno(status);
 323                 goto leave;
 324         }
 325
 326         handle = ocfs2_start_trans(osb, OCFS2_MKNOD_CREDITS + xattr_credits);
 327         if (IS_ERR(handle)) {
 328                 status = PTR_ERR(handle);
 329                 handle = NULL;
 330                 mlog_errno(status);
 331                 goto leave;
 332         }
 333
 334         /* do the real work now. */
 335         status = ocfs2_mknod_locked(osb, dir, inode, dentry, dev,
 336                                     &new_fe_bh, parent_fe_bh, handle,
 337                                     inode_ac);
 338         if (status < 0) {
 339                 mlog_errno(status);
 340                 goto leave;
 341         }
 342
 343         if (S_ISDIR(mode)) {
 344                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
 345                                             new_fe_bh, data_ac);
 346                 if (status < 0) {
 347                         mlog_errno(status);
 348                         goto leave;
 349                 }
 350
 351                 status = ocfs2_journal_access(handle, dir, parent_fe_bh,
 352                                               OCFS2_JOURNAL_ACCESS_WRITE);
 353                 if (status < 0) {
 354                         mlog_errno(status);
 355                         goto leave;
 356                 }
 357                 le16_add_cpu(&dirfe->i_links_count, 1);
 358                 status = ocfs2_journal_dirty(handle, parent_fe_bh);
 359                 if (status < 0) {
 360                         mlog_errno(status);
 361                         goto leave;
 362                 }
 363                 inc_nlink(dir);
 364         }
 365
 366         if (si.enable) {
 367                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
 368                                                  xattr_ac, data_ac);
 369                 if (status < 0) {
 370                         mlog_errno(status);
 371                         goto leave;
 372                 }
 373         }
 374
 375         status = ocfs2_add_entry(handle, dentry, inode,
 376                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
 377                                  de_bh);
 378         if (status < 0) {
 379                 mlog_errno(status);
 380                 goto leave;
 381         }
 382
 383         status = ocfs2_dentry_attach_lock(dentry, inode,
 384                                           OCFS2_I(dir)->ip_blkno);
 385         if (status) {
 386                 mlog_errno(status);
 387                 goto leave;
 388         }
 389
 390         insert_inode_hash(inode);
 391         dentry->d_op = &ocfs2_dentry_ops;
 392         d_instantiate(dentry, inode);
 393         status = 0;
 394 leave:
 395         if (handle)
 396                 ocfs2_commit_trans(osb, handle);
 397
 398         ocfs2_inode_unlock(dir, 1);
 399
 400         if (status == -ENOSPC)
 401                 mlog(0, "Disk is full\n");
 402
 403         brelse(new_fe_bh);
 404         brelse(de_bh);
 405         brelse(parent_fe_bh);
 406         kfree(si.name);
 407         kfree(si.value);
 408
 409         if ((status < 0) && inode) {
 410                 clear_nlink(inode);
 411                 iput(inode);
 412         }
 413
 414         if (inode_ac)
 415                 ocfs2_free_alloc_context(inode_ac);
 416
 417         if (data_ac)
 418                 ocfs2_free_alloc_context(data_ac);
 419
 420         if (xattr_ac)
 421                 ocfs2_free_alloc_context(xattr_ac);
 422
 423         mlog_exit(status);
 424
 425         return status;
 426 }
 427
 428 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 429                               struct inode *dir,
 430                               struct inode *inode,
 431                               struct dentry *dentry,
 432                               dev_t dev,
 433                               struct buffer_head **new_fe_bh,
 434                               struct buffer_head *parent_fe_bh,
 435                               handle_t *handle,
 436                               struct ocfs2_alloc_context *inode_ac)
 437 {
 438         int status = 0;
 439         struct ocfs2_dinode *fe = NULL;
 440         struct ocfs2_extent_list *fel;
 441         u64 fe_blkno = 0;
 442         u16 suballoc_bit;
 443
 444         mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry,
 445                    inode->i_mode, (unsigned long)dev, dentry->d_name.len,
 446                    dentry->d_name.name);
 447
 448         *new_fe_bh = NULL;
 449
 450         status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit,
 451                                        &fe_blkno);
 452         if (status < 0) {
 453                 mlog_errno(status);
 454                 goto leave;
 455         }
 456
 457         /* populate as many fields early on as possible - many of
 458          * these are used by the support functions here and in
 459          * callers. */
 460         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
 461         OCFS2_I(inode)->ip_blkno = fe_blkno;
 462         spin_lock(&osb->osb_lock);
 463         inode->i_generation = osb->s_next_generation++;
 464         spin_unlock(&osb->osb_lock);
 465
 466         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
 467         if (!*new_fe_bh) {
 468                 status = -EIO;
 469                 mlog_errno(status);
 470                 goto leave;
 471         }
 472         ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh);
 473
 474         status = ocfs2_journal_access(handle, inode, *new_fe_bh,
 475                                       OCFS2_JOURNAL_ACCESS_CREATE);
 476         if (status < 0) {
 477                 mlog_errno(status);
 478                 goto leave;
 479         }
 480
 481         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
 482         memset(fe, 0, osb->sb->s_blocksize);
 483
 484         fe->i_generation = cpu_to_le32(inode->i_generation);
 485         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
 486         fe->i_blkno = cpu_to_le64(fe_blkno);
 487         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
 488         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
 489         fe->i_uid = cpu_to_le32(inode->i_uid);
 490         fe->i_gid = cpu_to_le32(inode->i_gid);
 491         fe->i_mode = cpu_to_le16(inode->i_mode);
 492         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 493                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
 494         fe->i_links_count = cpu_to_le16(inode->i_nlink);
 495
 496         fe->i_last_eb_blk = 0;
 497         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
 498         le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
 499         fe->i_atime = fe->i_ctime = fe->i_mtime =
 500                 cpu_to_le64(CURRENT_TIME.tv_sec);
 501         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
 502                 cpu_to_le32(CURRENT_TIME.tv_nsec);
 503         fe->i_dtime = 0;
 504
 505         /*
 506          * If supported, directories start with inline data.
 507          */
 508         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
 509                 u16 feat = le16_to_cpu(fe->i_dyn_features);
 510
 511                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
 512
 513                 fe->id2.i_data.id_count = cpu_to_le16(ocfs2_max_inline_data(osb->sb));
 514         } else {
 515                 fel = &fe->id2.i_list;
 516                 fel->l_tree_depth = 0;
 517                 fel->l_next_free_rec = 0;
 518                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
 519         }
 520
 521         status = ocfs2_journal_dirty(handle, *new_fe_bh);
 522         if (status < 0) {
 523                 mlog_errno(status);
 524                 goto leave;
 525         }
 526
 527         if (ocfs2_populate_inode(inode, fe, 1) < 0) {
 528                 mlog(ML_ERROR, "populate inode failed! bh->b_blocknr=%llu, "
 529                      "i_blkno=%llu, i_ino=%lu\n",
 530                      (unsigned long long)(*new_fe_bh)->b_blocknr,
 531                      (unsigned long long)le64_to_cpu(fe->i_blkno),
 532                      inode->i_ino);
 533                 BUG();
 534         }
 535
 536         ocfs2_inode_set_new(osb, inode);
 537         if (!ocfs2_mount_local(osb)) {
 538                 status = ocfs2_create_new_inode_locks(inode);
 539                 if (status < 0)
 540                         mlog_errno(status);
 541         }
 542
 543         status = 0; /* error in ocfs2_create_new_inode_locks is not
 544                      * critical */
 545
 546 leave:
 547         if (status < 0) {
 548                 if (*new_fe_bh) {
 549                         brelse(*new_fe_bh);
 550                         *new_fe_bh = NULL;
 551                 }
 552         }
 553
 554         mlog_exit(status);
 555         return status;
 556 }
 557
 558 static int ocfs2_mkdir(struct inode *dir,
 559                        struct dentry *dentry,
 560                        int mode)
 561 {
 562         int ret;
 563
 564         mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
 565                    dentry->d_name.len, dentry->d_name.name);
 566         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
 567         mlog_exit(ret);
 568
 569         return ret;
 570 }
 571
 572 static int ocfs2_create(struct inode *dir,
 573                         struct dentry *dentry,
 574                         int mode,
 575                         struct nameidata *nd)
 576 {
 577         int ret;
 578
 579         mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
 580                    dentry->d_name.len, dentry->d_name.name);
 581         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
 582         mlog_exit(ret);
 583
 584         return ret;
 585 }
 586
 587 static int ocfs2_link(struct dentry *old_dentry,
 588                       struct inode *dir,
 589                       struct dentry *dentry)
 590 {
 591         handle_t *handle;
 592         struct inode *inode = old_dentry->d_inode;
 593         int err;
 594         struct buffer_head *fe_bh = NULL;
 595         struct buffer_head *parent_fe_bh = NULL;
 596         struct buffer_head *de_bh = NULL;
 597         struct ocfs2_dinode *fe = NULL;
 598         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 599
 600         mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
 601                    old_dentry->d_name.len, old_dentry->d_name.name,
 602                    dentry->d_name.len, dentry->d_name.name);
 603
 604         if (S_ISDIR(inode->i_mode))
 605                 return -EPERM;
 606
 607         err = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
 608         if (err < 0) {
 609                 if (err != -ENOENT)
 610                         mlog_errno(err);
 611                 return err;
 612         }
 613
 614         if (!dir->i_nlink) {
 615                 err = -ENOENT;
 616                 goto out;
 617         }
 618
 619         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
 620                                         dentry->d_name.len);
 621         if (err)
 622                 goto out;
 623
 624         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
 625                                            dentry->d_name.name,
 626                                            dentry->d_name.len, &de_bh);
 627         if (err < 0) {
 628                 mlog_errno(err);
 629                 goto out;
 630         }
 631
 632         err = ocfs2_inode_lock(inode, &fe_bh, 1);
 633         if (err < 0) {
 634                 if (err != -ENOENT)
 635                         mlog_errno(err);
 636                 goto out;
 637         }
 638
 639         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 640         if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) {
 641                 err = -EMLINK;
 642                 goto out_unlock_inode;
 643         }
 644
 645         handle = ocfs2_start_trans(osb, OCFS2_LINK_CREDITS);
 646         if (IS_ERR(handle)) {
 647                 err = PTR_ERR(handle);
 648                 handle = NULL;
 649                 mlog_errno(err);
 650                 goto out_unlock_inode;
 651         }
 652
 653         err = ocfs2_journal_access(handle, inode, fe_bh,
 654                                    OCFS2_JOURNAL_ACCESS_WRITE);
 655         if (err < 0) {
 656                 mlog_errno(err);
 657                 goto out_commit;
 658         }
 659
 660         inc_nlink(inode);
 661         inode->i_ctime = CURRENT_TIME;
 662         fe->i_links_count = cpu_to_le16(inode->i_nlink);
 663         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 664         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 665
 666         err = ocfs2_journal_dirty(handle, fe_bh);
 667         if (err < 0) {
 668                 le16_add_cpu(&fe->i_links_count, -1);
 669                 drop_nlink(inode);
 670                 mlog_errno(err);
 671                 goto out_commit;
 672         }
 673
 674         err = ocfs2_add_entry(handle, dentry, inode,
 675                               OCFS2_I(inode)->ip_blkno,
 676                               parent_fe_bh, de_bh);
 677         if (err) {
 678                 le16_add_cpu(&fe->i_links_count, -1);
 679                 drop_nlink(inode);
 680                 mlog_errno(err);
 681                 goto out_commit;
 682         }
 683
 684         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
 685         if (err) {
 686                 mlog_errno(err);
 687                 goto out_commit;
 688         }
 689
 690         atomic_inc(&inode->i_count);
 691         dentry->d_op = &ocfs2_dentry_ops;
 692         d_instantiate(dentry, inode);
 693
 694 out_commit:
 695         ocfs2_commit_trans(osb, handle);
 696 out_unlock_inode:
 697         ocfs2_inode_unlock(inode, 1);
 698
 699 out:
 700         ocfs2_inode_unlock(dir, 1);
 701
 702         brelse(de_bh);
 703         brelse(fe_bh);
 704         brelse(parent_fe_bh);
 705
 706         mlog_exit(err);
 707
 708         return err;
 709 }
 710
 711 /*
 712  * Takes and drops an exclusive lock on the given dentry. This will
 713  * force other nodes to drop it.
 714  */
 715 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 716 {
 717         int ret;
 718
 719         ret = ocfs2_dentry_lock(dentry, 1);
 720         if (ret)
 721                 mlog_errno(ret);
 722         else
 723                 ocfs2_dentry_unlock(dentry, 1);
 724
 725         return ret;
 726 }
 727
 728 static inline int inode_is_unlinkable(struct inode *inode)
 729 {
 730         if (S_ISDIR(inode->i_mode)) {
 731                 if (inode->i_nlink == 2)
 732                         return 1;
 733                 return 0;
 734         }
 735
 736         if (inode->i_nlink == 1)
 737                 return 1;
 738         return 0;
 739 }
 740
 741 static int ocfs2_unlink(struct inode *dir,
 742                         struct dentry *dentry)
 743 {
 744         int status;
 745         int child_locked = 0;
 746         struct inode *inode = dentry->d_inode;
 747         struct inode *orphan_dir = NULL;
 748         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
 749         u64 blkno;
 750         struct ocfs2_dinode *fe = NULL;
 751         struct buffer_head *fe_bh = NULL;
 752         struct buffer_head *parent_node_bh = NULL;
 753         handle_t *handle = NULL;
 754         struct ocfs2_dir_entry *dirent = NULL;
 755         struct buffer_head *dirent_bh = NULL;
 756         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 757         struct buffer_head *orphan_entry_bh = NULL;
 758
 759         mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
 760                    dentry->d_name.len, dentry->d_name.name);
 761
 762         BUG_ON(dentry->d_parent->d_inode != dir);
 763
 764         mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);
 765
 766         if (inode == osb->root_inode) {
 767                 mlog(0, "Cannot delete the root directory\n");
 768                 return -EPERM;
 769         }
 770
 771         status = ocfs2_inode_lock(dir, &parent_node_bh, 1);
 772         if (status < 0) {
 773                 if (status != -ENOENT)
 774                         mlog_errno(status);
 775                 return status;
 776         }
 777
 778         status = ocfs2_find_files_on_disk(dentry->d_name.name,
 779                                           dentry->d_name.len, &blkno,
 780                                           dir, &dirent_bh, &dirent);
 781         if (status < 0) {
 782                 if (status != -ENOENT)
 783                         mlog_errno(status);
 784                 goto leave;
 785         }
 786
 787         if (OCFS2_I(inode)->ip_blkno != blkno) {
 788                 status = -ENOENT;
 789
 790                 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
 791                      (unsigned long long)OCFS2_I(inode)->ip_blkno,
 792                      (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
 793                 goto leave;
 794         }
 795
 796         status = ocfs2_inode_lock(inode, &fe_bh, 1);
 797         if (status < 0) {
 798                 if (status != -ENOENT)
 799                         mlog_errno(status);
 800                 goto leave;
 801         }
 802         child_locked = 1;
 803
 804         if (S_ISDIR(inode->i_mode)) {
 805                 if (!ocfs2_empty_dir(inode)) {
 806                         status = -ENOTEMPTY;
 807                         goto leave;
 808                 } else if (inode->i_nlink != 2) {
 809                         status = -ENOTEMPTY;
 810                         goto leave;
 811                 }
 812         }
 813
 814         status = ocfs2_remote_dentry_delete(dentry);
 815         if (status < 0) {
 816                 /* This remote delete should succeed under all normal
 817                  * circumstances. */
 818                 mlog_errno(status);
 819                 goto leave;
 820         }
 821
 822         if (inode_is_unlinkable(inode)) {
 823                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, inode,
 824                                                   orphan_name,
 825                                                   &orphan_entry_bh);
 826                 if (status < 0) {
 827                         mlog_errno(status);
 828                         goto leave;
 829                 }
 830         }
 831
 832         handle = ocfs2_start_trans(osb, OCFS2_UNLINK_CREDITS);
 833         if (IS_ERR(handle)) {
 834                 status = PTR_ERR(handle);
 835                 handle = NULL;
 836                 mlog_errno(status);
 837                 goto leave;
 838         }
 839
 840         status = ocfs2_journal_access(handle, inode, fe_bh,
 841                                       OCFS2_JOURNAL_ACCESS_WRITE);
 842         if (status < 0) {
 843                 mlog_errno(status);
 844                 goto leave;
 845         }
 846
 847         fe = (struct ocfs2_dinode *) fe_bh->b_data;
 848
 849         if (inode_is_unlinkable(inode)) {
 850                 status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name,
 851                                           orphan_entry_bh, orphan_dir);
 852                 if (status < 0) {
 853                         mlog_errno(status);
 854                         goto leave;
 855                 }
 856         }
 857
 858         /* delete the name from the parent dir */
 859         status = ocfs2_delete_entry(handle, dir, dirent, dirent_bh);
 860         if (status < 0) {
 861                 mlog_errno(status);
 862                 goto leave;
 863         }
 864
 865         if (S_ISDIR(inode->i_mode))
 866                 drop_nlink(inode);
 867         drop_nlink(inode);
 868         fe->i_links_count = cpu_to_le16(inode->i_nlink);
 869
 870         status = ocfs2_journal_dirty(handle, fe_bh);
 871         if (status < 0) {
 872                 mlog_errno(status);
 873                 goto leave;
 874         }
 875
 876         dir->i_ctime = dir->i_mtime = CURRENT_TIME;
 877         if (S_ISDIR(inode->i_mode))
 878                 drop_nlink(dir);
 879
 880         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
 881         if (status < 0) {
 882                 mlog_errno(status);
 883                 if (S_ISDIR(inode->i_mode))
 884                         inc_nlink(dir);
 885         }
 886
 887 leave:
 888         if (handle)
 889                 ocfs2_commit_trans(osb, handle);
 890
 891         if (child_locked)
 892                 ocfs2_inode_unlock(inode, 1);
 893
 894         ocfs2_inode_unlock(dir, 1);
 895
 896         if (orphan_dir) {
 897                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
 898                 ocfs2_inode_unlock(orphan_dir, 1);
 899                 mutex_unlock(&orphan_dir->i_mutex);
 900                 iput(orphan_dir);
 901         }
 902
 903         brelse(fe_bh);
 904         brelse(dirent_bh);
 905         brelse(parent_node_bh);
 906         brelse(orphan_entry_bh);
 907
 908         mlog_exit(status);
 909
 910         return status;
 911 }
 912
 913 /*
 914  * The only place this should be used is rename!
 915  * if they have the same id, then the 1st one is the only one locked.
 916  */
 917 static int ocfs2_double_lock(struct ocfs2_super *osb,
 918                              struct buffer_head **bh1,
 919                              struct inode *inode1,
 920                              struct buffer_head **bh2,
 921                              struct inode *inode2)
 922 {
 923         int status;
 924         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
 925         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
 926         struct buffer_head **tmpbh;
 927         struct inode *tmpinode;
 928
 929         mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
 930                    (unsigned long long)oi1->ip_blkno,
 931                    (unsigned long long)oi2->ip_blkno);
 932
 933         if (*bh1)
 934                 *bh1 = NULL;
 935         if (*bh2)
 936                 *bh2 = NULL;
 937
 938         /* we always want to lock the one with the lower lockid first. */
 939         if (oi1->ip_blkno != oi2->ip_blkno) {
 940                 if (oi1->ip_blkno < oi2->ip_blkno) {
 941                         /* switch id1 and id2 around */
 942                         mlog(0, "switching them around...\n");
 943                         tmpbh = bh2;
 944                         bh2 = bh1;
 945                         bh1 = tmpbh;
 946
 947                         tmpinode = inode2;
 948                         inode2 = inode1;
 949                         inode1 = tmpinode;
 950                 }
 951                 /* lock id2 */
 952                 status = ocfs2_inode_lock(inode2, bh2, 1);
 953                 if (status < 0) {
 954                         if (status != -ENOENT)
 955                                 mlog_errno(status);
 956                         goto bail;
 957                 }
 958         }
 959
 960         /* lock id1 */
 961         status = ocfs2_inode_lock(inode1, bh1, 1);
 962         if (status < 0) {
 963                 /*
 964                  * An error return must mean that no cluster locks
 965                  * were held on function exit.
 966                  */
 967                 if (oi1->ip_blkno != oi2->ip_blkno)
 968                         ocfs2_inode_unlock(inode2, 1);
 969
 970                 if (status != -ENOENT)
 971                         mlog_errno(status);
 972         }
 973
 974 bail:
 975         mlog_exit(status);
 976         return status;
 977 }
 978
 979 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
 980 {
 981         ocfs2_inode_unlock(inode1, 1);
 982
 983         if (inode1 != inode2)
 984                 ocfs2_inode_unlock(inode2, 1);
 985 }
 986
 987 static int ocfs2_rename(struct inode *old_dir,
 988                         struct dentry *old_dentry,
 989                         struct inode *new_dir,
 990                         struct dentry *new_dentry)
 991 {
 992         int status = 0, rename_lock = 0, parents_locked = 0;
 993         int old_child_locked = 0, new_child_locked = 0;
 994         struct inode *old_inode = old_dentry->d_inode;
 995         struct inode *new_inode = new_dentry->d_inode;
 996         struct inode *orphan_dir = NULL;
 997         struct ocfs2_dinode *newfe = NULL;
 998         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
 999         struct buffer_head *orphan_entry_bh = NULL;
1000         struct buffer_head *newfe_bh = NULL;
1001         struct buffer_head *old_inode_bh = NULL;
1002         struct buffer_head *insert_entry_bh = NULL;
1003         struct ocfs2_super *osb = NULL;
1004         u64 newfe_blkno, old_de_ino;
1005         handle_t *handle = NULL;
1006         struct buffer_head *old_dir_bh = NULL;
1007         struct buffer_head *new_dir_bh = NULL;
1008         struct ocfs2_dir_entry *old_inode_dot_dot_de = NULL, *old_de = NULL,
1009                 *new_de = NULL;
1010         struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above
1011         struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir,
1012                                                     // this is the 1st dirent bh
1013         nlink_t old_dir_nlink = old_dir->i_nlink;
1014         struct ocfs2_dinode *old_di;
1015
1016         /* At some point it might be nice to break this function up a
1017          * bit. */
1018
1019         mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
1020                    old_dir, old_dentry, new_dir, new_dentry,
1021                    old_dentry->d_name.len, old_dentry->d_name.name,
1022                    new_dentry->d_name.len, new_dentry->d_name.name);
1023
1024         osb = OCFS2_SB(old_dir->i_sb);
1025
1026         if (new_inode) {
1027                 if (!igrab(new_inode))
1028                         BUG();
1029         }
1030
1031         /* Assume a directory hierarchy thusly:
1032          * a/b/c
1033          * a/d
1034          * a,b,c, and d are all directories.
1035          *
1036          * from cwd of 'a' on both nodes:
1037          * node1: mv b/c d
1038          * node2: mv d   b/c
1039          *
1040          * And that's why, just like the VFS, we need a file system
1041          * rename lock. */
1042         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1043                 status = ocfs2_rename_lock(osb);
1044                 if (status < 0) {
1045                         mlog_errno(status);
1046                         goto bail;
1047                 }
1048                 rename_lock = 1;
1049         }
1050
1051         /* if old and new are the same, this'll just do one lock. */
1052         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1053                                    &new_dir_bh, new_dir);
1054         if (status < 0) {
1055                 mlog_errno(status);
1056                 goto bail;
1057         }
1058         parents_locked = 1;
1059
1060         /* make sure both dirs have bhs
1061          * get an extra ref on old_dir_bh if old==new */
1062         if (!new_dir_bh) {
1063                 if (old_dir_bh) {
1064                         new_dir_bh = old_dir_bh;
1065                         get_bh(new_dir_bh);
1066                 } else {
1067                         mlog(ML_ERROR, "no old_dir_bh!\n");
1068                         status = -EIO;
1069                         goto bail;
1070                 }
1071         }
1072
1073         /*
1074          * Aside from allowing a meta data update, the locking here
1075          * also ensures that the downconvert thread on other nodes
1076          * won't have to concurrently downconvert the inode and the
1077          * dentry locks.
1078          */
1079         status = ocfs2_inode_lock(old_inode, &old_inode_bh, 1);
1080         if (status < 0) {
1081                 if (status != -ENOENT)
1082                         mlog_errno(status);
1083                 goto bail;
1084         }
1085         old_child_locked = 1;
1086
1087         status = ocfs2_remote_dentry_delete(old_dentry);
1088         if (status < 0) {
1089                 mlog_errno(status);
1090                 goto bail;
1091         }
1092
1093         if (S_ISDIR(old_inode->i_mode)) {
1094                 u64 old_inode_parent;
1095
1096                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1097                                                   old_inode, &old_inode_de_bh,
1098                                                   &old_inode_dot_dot_de);
1099                 if (status) {
1100                         status = -EIO;
1101                         goto bail;
1102                 }
1103
1104                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1105                         status = -EIO;
1106                         goto bail;
1107                 }
1108
1109                 if (!new_inode && new_dir != old_dir &&
1110                     new_dir->i_nlink >= OCFS2_LINK_MAX) {
1111                         status = -EMLINK;
1112                         goto bail;
1113                 }
1114         }
1115
1116         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1117                                             old_dentry->d_name.len,
1118                                             &old_de_ino);
1119         if (status) {
1120                 status = -ENOENT;
1121                 goto bail;
1122         }
1123
1124         /*
1125          *  Check for inode number is _not_ due to possible IO errors.
1126          *  We might rmdir the source, keep it as pwd of some process
1127          *  and merrily kill the link to whatever was created under the
1128          *  same name. Goodbye sticky bit ;-<
1129          */
1130         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1131                 status = -ENOENT;
1132                 goto bail;
1133         }
1134
1135         /* check if the target already exists (in which case we need
1136          * to delete it */
1137         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1138                                           new_dentry->d_name.len,
1139                                           &newfe_blkno, new_dir, &new_de_bh,
1140                                           &new_de);
1141         /* The only error we allow here is -ENOENT because the new
1142          * file not existing is perfectly valid. */
1143         if ((status < 0) && (status != -ENOENT)) {
1144                 /* If we cannot find the file specified we should just */
1145                 /* return the error... */
1146                 mlog_errno(status);
1147                 goto bail;
1148         }
1149
1150         if (!new_de && new_inode) {
1151                 /*
1152                  * Target was unlinked by another node while we were
1153                  * waiting to get to ocfs2_rename(). There isn't
1154                  * anything we can do here to help the situation, so
1155                  * bubble up the appropriate error.
1156                  */
1157                 status = -ENOENT;
1158                 goto bail;
1159         }
1160
1161         /* In case we need to overwrite an existing file, we blow it
1162          * away first */
1163         if (new_de) {
1164                 /* VFS didn't think there existed an inode here, but
1165                  * someone else in the cluster must have raced our
1166                  * rename to create one. Today we error cleanly, in
1167                  * the future we should consider calling iget to build
1168                  * a new struct inode for this entry. */
1169                 if (!new_inode) {
1170                         status = -EACCES;
1171
1172                         mlog(0, "We found an inode for name %.*s but VFS "
1173                              "didn't give us one.\n", new_dentry->d_name.len,
1174                              new_dentry->d_name.name);
1175                         goto bail;
1176                 }
1177
1178                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1179                         status = -EACCES;
1180
1181                         mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1182                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1183                              (unsigned long long)newfe_blkno,
1184                              OCFS2_I(new_inode)->ip_flags);
1185                         goto bail;
1186                 }
1187
1188                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1189                 if (status < 0) {
1190                         if (status != -ENOENT)
1191                                 mlog_errno(status);
1192                         goto bail;
1193                 }
1194                 new_child_locked = 1;
1195
1196                 status = ocfs2_remote_dentry_delete(new_dentry);
1197                 if (status < 0) {
1198                         mlog_errno(status);
1199                         goto bail;
1200                 }
1201
1202                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1203
1204                 mlog(0, "aha rename over existing... new_de=%p new_blkno=%llu "
1205                      "newfebh=%p bhblocknr=%llu\n", new_de,
1206                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1207                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1208
1209                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1210                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1211                                                           new_inode,
1212                                                           orphan_name,
1213                                                           &orphan_entry_bh);
1214                         if (status < 0) {
1215                                 mlog_errno(status);
1216                                 goto bail;
1217                         }
1218                 }
1219         } else {
1220                 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1221
1222                 status = ocfs2_check_dir_for_entry(new_dir,
1223                                                    new_dentry->d_name.name,
1224                                                    new_dentry->d_name.len);
1225                 if (status)
1226                         goto bail;
1227
1228                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1229                                                       new_dentry->d_name.name,
1230                                                       new_dentry->d_name.len,
1231                                                       &insert_entry_bh);
1232                 if (status < 0) {
1233                         mlog_errno(status);
1234                         goto bail;
1235                 }
1236         }
1237
1238         handle = ocfs2_start_trans(osb, OCFS2_RENAME_CREDITS);
1239         if (IS_ERR(handle)) {
1240                 status = PTR_ERR(handle);
1241                 handle = NULL;
1242                 mlog_errno(status);
1243                 goto bail;
1244         }
1245
1246         if (new_de) {
1247                 if (S_ISDIR(new_inode->i_mode)) {
1248                         if (!ocfs2_empty_dir(new_inode) ||
1249                             new_inode->i_nlink != 2) {
1250                                 status = -ENOTEMPTY;
1251                                 goto bail;
1252                         }
1253                 }
1254                 status = ocfs2_journal_access(handle, new_inode, newfe_bh,
1255                                               OCFS2_JOURNAL_ACCESS_WRITE);
1256                 if (status < 0) {
1257                         mlog_errno(status);
1258                         goto bail;
1259                 }
1260
1261                 if (S_ISDIR(new_inode->i_mode) ||
1262                     (newfe->i_links_count == cpu_to_le16(1))){
1263                         status = ocfs2_orphan_add(osb, handle, new_inode,
1264                                                   newfe, orphan_name,
1265                                                   orphan_entry_bh, orphan_dir);
1266                         if (status < 0) {
1267                                 mlog_errno(status);
1268                                 goto bail;
1269                         }
1270                 }
1271
1272                 /* change the dirent to point to the correct inode */
1273                 status = ocfs2_update_entry(new_dir, handle, new_de_bh,
1274                                             new_de, old_inode);
1275                 if (status < 0) {
1276                         mlog_errno(status);
1277                         goto bail;
1278                 }
1279                 new_dir->i_version++;
1280
1281                 if (S_ISDIR(new_inode->i_mode))
1282                         newfe->i_links_count = 0;
1283                 else
1284                         le16_add_cpu(&newfe->i_links_count, -1);
1285
1286                 status = ocfs2_journal_dirty(handle, newfe_bh);
1287                 if (status < 0) {
1288                         mlog_errno(status);
1289                         goto bail;
1290                 }
1291         } else {
1292                 /* if the name was not found in new_dir, add it now */
1293                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1294                                          OCFS2_I(old_inode)->ip_blkno,
1295                                          new_dir_bh, insert_entry_bh);
1296         }
1297
1298         old_inode->i_ctime = CURRENT_TIME;
1299         mark_inode_dirty(old_inode);
1300
1301         status = ocfs2_journal_access(handle, old_inode, old_inode_bh,
1302                                       OCFS2_JOURNAL_ACCESS_WRITE);
1303         if (status >= 0) {
1304                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1305
1306                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1307                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1308
1309                 status = ocfs2_journal_dirty(handle, old_inode_bh);
1310                 if (status < 0)
1311                         mlog_errno(status);
1312         } else
1313                 mlog_errno(status);
1314
1315         /*
1316          * Now that the name has been added to new_dir, remove the old name.
1317          *
1318          * We don't keep any directory entry context around until now
1319          * because the insert might have changed the type of directory
1320          * we're dealing with.
1321          */
1322         old_de_bh = ocfs2_find_entry(old_dentry->d_name.name,
1323                                      old_dentry->d_name.len,
1324                                      old_dir, &old_de);
1325         if (!old_de_bh) {
1326                 status = -EIO;
1327                 goto bail;
1328         }
1329
1330         status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh);
1331         if (status < 0) {
1332                 mlog_errno(status);
1333                 goto bail;
1334         }
1335
1336         if (new_inode) {
1337                 new_inode->i_nlink--;
1338                 new_inode->i_ctime = CURRENT_TIME;
1339         }
1340         old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1341         if (old_inode_de_bh) {
1342                 status = ocfs2_update_entry(old_inode, handle, old_inode_de_bh,
1343                                             old_inode_dot_dot_de, new_dir);
1344                 old_dir->i_nlink--;
1345                 if (new_inode) {
1346                         new_inode->i_nlink--;
1347                 } else {
1348                         inc_nlink(new_dir);
1349                         mark_inode_dirty(new_dir);
1350                 }
1351         }
1352         mark_inode_dirty(old_dir);
1353         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1354         if (new_inode) {
1355                 mark_inode_dirty(new_inode);
1356                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1357         }
1358
1359         if (old_dir != new_dir) {
1360                 /* Keep the same times on both directories.*/
1361                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1362
1363                 /*
1364                  * This will also pick up the i_nlink change from the
1365                  * block above.
1366                  */
1367                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1368         }
1369
1370         if (old_dir_nlink != old_dir->i_nlink) {
1371                 if (!old_dir_bh) {
1372                         mlog(ML_ERROR, "need to change nlink for old dir "
1373                              "%llu from %d to %d but bh is NULL!\n",
1374                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1375                              (int)old_dir_nlink, old_dir->i_nlink);
1376                 } else {
1377                         struct ocfs2_dinode *fe;
1378                         status = ocfs2_journal_access(handle, old_dir,
1379                                                       old_dir_bh,
1380                                                       OCFS2_JOURNAL_ACCESS_WRITE);
1381                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1382                         fe->i_links_count = cpu_to_le16(old_dir->i_nlink);
1383                         status = ocfs2_journal_dirty(handle, old_dir_bh);
1384                 }
1385         }
1386
1387         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1388         status = 0;
1389 bail:
1390         if (rename_lock)
1391                 ocfs2_rename_unlock(osb);
1392
1393         if (handle)
1394                 ocfs2_commit_trans(osb, handle);
1395
1396         if (parents_locked)
1397                 ocfs2_double_unlock(old_dir, new_dir);
1398
1399         if (old_child_locked)
1400                 ocfs2_inode_unlock(old_inode, 1);
1401
1402         if (new_child_locked)
1403                 ocfs2_inode_unlock(new_inode, 1);
1404
1405         if (orphan_dir) {
1406                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1407                 ocfs2_inode_unlock(orphan_dir, 1);
1408                 mutex_unlock(&orphan_dir->i_mutex);
1409                 iput(orphan_dir);
1410         }
1411
1412         if (new_inode)
1413                 sync_mapping_buffers(old_inode->i_mapping);
1414
1415         if (new_inode)
1416                 iput(new_inode);
1417         brelse(newfe_bh);
1418         brelse(old_inode_bh);
1419         brelse(old_dir_bh);
1420         brelse(new_dir_bh);
1421         brelse(new_de_bh);
1422         brelse(old_de_bh);
1423         brelse(old_inode_de_bh);
1424         brelse(orphan_entry_bh);
1425         brelse(insert_entry_bh);
1426
1427         mlog_exit(status);
1428
1429         return status;
1430 }
1431
1432 /*
1433  * we expect i_size = strlen(symname). Copy symname into the file
1434  * data, including the null terminator.
1435  */
1436 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1437                                      handle_t *handle,
1438                                      struct inode *inode,
1439                                      const char *symname)
1440 {
1441         struct buffer_head **bhs = NULL;
1442         const char *c;
1443         struct super_block *sb = osb->sb;
1444         u64 p_blkno, p_blocks;
1445         int virtual, blocks, status, i, bytes_left;
1446
1447         bytes_left = i_size_read(inode) + 1;
1448         /* we can't trust i_blocks because we're actually going to
1449          * write i_size + 1 bytes. */
1450         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1451
1452         mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
1453                         (unsigned long long)inode->i_blocks,
1454                         i_size_read(inode), blocks);
1455
1456         /* Sanity check -- make sure we're going to fit. */
1457         if (bytes_left >
1458             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1459                 status = -EIO;
1460                 mlog_errno(status);
1461                 goto bail;
1462         }
1463
1464         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1465         if (!bhs) {
1466                 status = -ENOMEM;
1467                 mlog_errno(status);
1468                 goto bail;
1469         }
1470
1471         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1472                                              NULL);
1473         if (status < 0) {
1474                 mlog_errno(status);
1475                 goto bail;
1476         }
1477
1478         /* links can never be larger than one cluster so we know this
1479          * is all going to be contiguous, but do a sanity check
1480          * anyway. */
1481         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1482                 status = -EIO;
1483                 mlog_errno(status);
1484                 goto bail;
1485         }
1486
1487         virtual = 0;
1488         while(bytes_left > 0) {
1489                 c = &symname[virtual * sb->s_blocksize];
1490
1491                 bhs[virtual] = sb_getblk(sb, p_blkno);
1492                 if (!bhs[virtual]) {
1493                         status = -ENOMEM;
1494                         mlog_errno(status);
1495                         goto bail;
1496                 }
1497                 ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]);
1498
1499                 status = ocfs2_journal_access(handle, inode, bhs[virtual],
1500                                               OCFS2_JOURNAL_ACCESS_CREATE);
1501                 if (status < 0) {
1502                         mlog_errno(status);
1503                         goto bail;
1504                 }
1505
1506                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1507
1508                 memcpy(bhs[virtual]->b_data, c,
1509                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1510                        bytes_left);
1511
1512                 status = ocfs2_journal_dirty(handle, bhs[virtual]);
1513                 if (status < 0) {
1514                         mlog_errno(status);
1515                         goto bail;
1516                 }
1517
1518                 virtual++;
1519                 p_blkno++;
1520                 bytes_left -= sb->s_blocksize;
1521         }
1522
1523         status = 0;
1524 bail:
1525
1526         if (bhs) {
1527                 for(i = 0; i < blocks; i++)
1528                         brelse(bhs[i]);
1529                 kfree(bhs);
1530         }
1531
1532         mlog_exit(status);
1533         return status;
1534 }
1535
1536 static int ocfs2_symlink(struct inode *dir,
1537                          struct dentry *dentry,
1538                          const char *symname)
1539 {
1540         int status, l, credits;
1541         u64 newsize;
1542         struct ocfs2_super *osb = NULL;
1543         struct inode *inode = NULL;
1544         struct super_block *sb;
1545         struct buffer_head *new_fe_bh = NULL;
1546         struct buffer_head *de_bh = NULL;
1547         struct buffer_head *parent_fe_bh = NULL;
1548         struct ocfs2_dinode *fe = NULL;
1549         struct ocfs2_dinode *dirfe;
1550         handle_t *handle = NULL;
1551         struct ocfs2_alloc_context *inode_ac = NULL;
1552         struct ocfs2_alloc_context *data_ac = NULL;
1553         struct ocfs2_alloc_context *xattr_ac = NULL;
1554         int want_clusters = 0;
1555         int xattr_credits = 0;
1556         struct ocfs2_security_xattr_info si = {
1557                 .enable = 1,
1558         };
1559
1560         mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1561                    dentry, symname, dentry->d_name.len, dentry->d_name.name);
1562
1563         sb = dir->i_sb;
1564         osb = OCFS2_SB(sb);
1565
1566         l = strlen(symname) + 1;
1567
1568         credits = ocfs2_calc_symlink_credits(sb);
1569
1570         /* lock the parent directory */
1571         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1572         if (status < 0) {
1573                 if (status != -ENOENT)
1574                         mlog_errno(status);
1575                 return status;
1576         }
1577
1578         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1579         if (!dirfe->i_links_count) {
1580                 /* can't make a file in a deleted directory. */
1581                 status = -ENOENT;
1582                 goto bail;
1583         }
1584
1585         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1586                                            dentry->d_name.len);
1587         if (status)
1588                 goto bail;
1589
1590         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1591                                               dentry->d_name.name,
1592                                               dentry->d_name.len, &de_bh);
1593         if (status < 0) {
1594                 mlog_errno(status);
1595                 goto bail;
1596         }
1597
1598         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1599         if (status < 0) {
1600                 if (status != -ENOSPC)
1601                         mlog_errno(status);
1602                 goto bail;
1603         }
1604
1605         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1606         if (!inode) {
1607                 status = -ENOMEM;
1608                 mlog_errno(status);
1609                 goto bail;
1610         }
1611
1612         /* get security xattr */
1613         status = ocfs2_init_security_get(inode, dir, &si);
1614         if (status) {
1615                 if (status == -EOPNOTSUPP)
1616                         si.enable = 0;
1617                 else {
1618                         mlog_errno(status);
1619                         goto bail;
1620                 }
1621         }
1622
1623         /* calculate meta data/clusters for setting security xattr */
1624         if (si.enable) {
1625                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1626                                                   &xattr_credits, &xattr_ac);
1627                 if (status < 0) {
1628                         mlog_errno(status);
1629                         goto bail;
1630                 }
1631         }
1632
1633         /* don't reserve bitmap space for fast symlinks. */
1634         if (l > ocfs2_fast_symlink_chars(sb))
1635                 want_clusters += 1;
1636
1637         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1638         if (status < 0) {
1639                 if (status != -ENOSPC)
1640                         mlog_errno(status);
1641                 goto bail;
1642         }
1643
1644         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1645         if (IS_ERR(handle)) {
1646                 status = PTR_ERR(handle);
1647                 handle = NULL;
1648                 mlog_errno(status);
1649                 goto bail;
1650         }
1651
1652         status = ocfs2_mknod_locked(osb, dir, inode, dentry,
1653                                     0, &new_fe_bh, parent_fe_bh, handle,
1654                                     inode_ac);
1655         if (status < 0) {
1656                 mlog_errno(status);
1657                 goto bail;
1658         }
1659
1660         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1661         inode->i_rdev = 0;
1662         newsize = l - 1;
1663         if (l > ocfs2_fast_symlink_chars(sb)) {
1664                 u32 offset = 0;
1665
1666                 inode->i_op = &ocfs2_symlink_inode_operations;
1667                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1668                                               new_fe_bh,
1669                                               handle, data_ac, NULL,
1670                                               NULL);
1671                 if (status < 0) {
1672                         if (status != -ENOSPC && status != -EINTR) {
1673                                 mlog(ML_ERROR,
1674                                      "Failed to extend file to %llu\n",
1675                                      (unsigned long long)newsize);
1676                                 mlog_errno(status);
1677                                 status = -ENOSPC;
1678                         }
1679                         goto bail;
1680                 }
1681                 i_size_write(inode, newsize);
1682                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1683         } else {
1684                 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1685                 memcpy((char *) fe->id2.i_symlink, symname, l);
1686                 i_size_write(inode, newsize);
1687                 inode->i_blocks = 0;
1688         }
1689
1690         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1691         if (status < 0) {
1692                 mlog_errno(status);
1693                 goto bail;
1694         }
1695
1696         if (!ocfs2_inode_is_fast_symlink(inode)) {
1697                 status = ocfs2_create_symlink_data(osb, handle, inode,
1698                                                    symname);
1699                 if (status < 0) {
1700                         mlog_errno(status);
1701                         goto bail;
1702                 }
1703         }
1704
1705         if (si.enable) {
1706                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1707                                                  xattr_ac, data_ac);
1708                 if (status < 0) {
1709                         mlog_errno(status);
1710                         goto bail;
1711                 }
1712         }
1713
1714         status = ocfs2_add_entry(handle, dentry, inode,
1715                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
1716                                  de_bh);
1717         if (status < 0) {
1718                 mlog_errno(status);
1719                 goto bail;
1720         }
1721
1722         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1723         if (status) {
1724                 mlog_errno(status);
1725                 goto bail;
1726         }
1727
1728         insert_inode_hash(inode);
1729         dentry->d_op = &ocfs2_dentry_ops;
1730         d_instantiate(dentry, inode);
1731 bail:
1732         if (handle)
1733                 ocfs2_commit_trans(osb, handle);
1734
1735         ocfs2_inode_unlock(dir, 1);
1736
1737         brelse(new_fe_bh);
1738         brelse(parent_fe_bh);
1739         brelse(de_bh);
1740         kfree(si.name);
1741         kfree(si.value);
1742         if (inode_ac)
1743                 ocfs2_free_alloc_context(inode_ac);
1744         if (data_ac)
1745                 ocfs2_free_alloc_context(data_ac);
1746         if (xattr_ac)
1747                 ocfs2_free_alloc_context(xattr_ac);
1748         if ((status < 0) && inode) {
1749                 clear_nlink(inode);
1750                 iput(inode);
1751         }
1752
1753         mlog_exit(status);
1754
1755         return status;
1756 }
1757
1758 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1759 {
1760         int status, namelen;
1761
1762         mlog_entry_void();
1763
1764         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1765                            (long long)blkno);
1766         if (namelen <= 0) {
1767                 if (namelen)
1768                         status = namelen;
1769                 else
1770                         status = -EINVAL;
1771                 mlog_errno(status);
1772                 goto bail;
1773         }
1774         if (namelen != OCFS2_ORPHAN_NAMELEN) {
1775                 status = -EINVAL;
1776                 mlog_errno(status);
1777                 goto bail;
1778         }
1779
1780         mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
1781              namelen);
1782
1783         status = 0;
1784 bail:
1785         mlog_exit(status);
1786         return status;
1787 }
1788
1789 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1790                                     struct inode **ret_orphan_dir,
1791                                     struct inode *inode,
1792                                     char *name,
1793                                     struct buffer_head **de_bh)
1794 {
1795         struct inode *orphan_dir_inode;
1796         struct buffer_head *orphan_dir_bh = NULL;
1797         int status = 0;
1798
1799         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
1800         if (status < 0) {
1801                 mlog_errno(status);
1802                 return status;
1803         }
1804
1805         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1806                                                        ORPHAN_DIR_SYSTEM_INODE,
1807                                                        osb->slot_num);
1808         if (!orphan_dir_inode) {
1809                 status = -ENOENT;
1810                 mlog_errno(status);
1811                 return status;
1812         }
1813
1814         mutex_lock(&orphan_dir_inode->i_mutex);
1815
1816         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1817         if (status < 0) {
1818                 mlog_errno(status);
1819                 goto leave;
1820         }
1821
1822         status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1823                                               orphan_dir_bh, name,
1824                                               OCFS2_ORPHAN_NAMELEN, de_bh);
1825         if (status < 0) {
1826                 ocfs2_inode_unlock(orphan_dir_inode, 1);
1827
1828                 mlog_errno(status);
1829                 goto leave;
1830         }
1831
1832         *ret_orphan_dir = orphan_dir_inode;
1833
1834 leave:
1835         if (status) {
1836                 mutex_unlock(&orphan_dir_inode->i_mutex);
1837                 iput(orphan_dir_inode);
1838         }
1839
1840         brelse(orphan_dir_bh);
1841
1842         mlog_exit(status);
1843         return status;
1844 }
1845
1846 static int ocfs2_orphan_add(struct ocfs2_super *osb,
1847                             handle_t *handle,
1848                             struct inode *inode,
1849                             struct ocfs2_dinode *fe,
1850                             char *name,
1851                             struct buffer_head *de_bh,
1852                             struct inode *orphan_dir_inode)
1853 {
1854         struct buffer_head *orphan_dir_bh = NULL;
1855         int status = 0;
1856         struct ocfs2_dinode *orphan_fe;
1857
1858         mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
1859
1860         status = ocfs2_read_block(orphan_dir_inode,
1861                                   OCFS2_I(orphan_dir_inode)->ip_blkno,
1862                                   &orphan_dir_bh);
1863         if (status < 0) {
1864                 mlog_errno(status);
1865                 goto leave;
1866         }
1867
1868         status = ocfs2_journal_access(handle, orphan_dir_inode, orphan_dir_bh,
1869                                       OCFS2_JOURNAL_ACCESS_WRITE);
1870         if (status < 0) {
1871                 mlog_errno(status);
1872                 goto leave;
1873         }
1874
1875         /* we're a cluster, and nlink can change on disk from
1876          * underneath us... */
1877         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
1878         if (S_ISDIR(inode->i_mode))
1879                 le16_add_cpu(&orphan_fe->i_links_count, 1);
1880         orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count);
1881
1882         status = ocfs2_journal_dirty(handle, orphan_dir_bh);
1883         if (status < 0) {
1884                 mlog_errno(status);
1885                 goto leave;
1886         }
1887
1888         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
1889                                    OCFS2_ORPHAN_NAMELEN, inode,
1890                                    OCFS2_I(inode)->ip_blkno,
1891                                    orphan_dir_bh, de_bh);
1892         if (status < 0) {
1893                 mlog_errno(status);
1894                 goto leave;
1895         }
1896
1897         le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
1898
1899         /* Record which orphan dir our inode now resides
1900          * in. delete_inode will use this to determine which orphan
1901          * dir to lock. */
1902         fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
1903
1904         mlog(0, "Inode %llu orphaned in slot %d\n",
1905              (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);
1906
1907 leave:
1908         brelse(orphan_dir_bh);
1909
1910         mlog_exit(status);
1911         return status;
1912 }
1913
1914 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
1915 int ocfs2_orphan_del(struct ocfs2_super *osb,
1916                      handle_t *handle,
1917                      struct inode *orphan_dir_inode,
1918                      struct inode *inode,
1919                      struct buffer_head *orphan_dir_bh)
1920 {
1921         char name[OCFS2_ORPHAN_NAMELEN + 1];
1922         struct ocfs2_dinode *orphan_fe;
1923         int status = 0;
1924         struct buffer_head *target_de_bh = NULL;
1925         struct ocfs2_dir_entry *target_de = NULL;
1926
1927         mlog_entry_void();
1928
1929         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
1930         if (status < 0) {
1931                 mlog_errno(status);
1932                 goto leave;
1933         }
1934
1935         mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
1936              name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
1937              OCFS2_ORPHAN_NAMELEN);
1938
1939         /* find it's spot in the orphan directory */
1940         target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN,
1941                                         orphan_dir_inode, &target_de);
1942         if (!target_de_bh) {
1943                 status = -ENOENT;
1944                 mlog_errno(status);
1945                 goto leave;
1946         }
1947
1948         /* remove it from the orphan directory */
1949         status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de,
1950                                     target_de_bh);
1951         if (status < 0) {
1952                 mlog_errno(status);
1953                 goto leave;
1954         }
1955
1956         status = ocfs2_journal_access(handle,orphan_dir_inode,  orphan_dir_bh,
1957                                       OCFS2_JOURNAL_ACCESS_WRITE);
1958         if (status < 0) {
1959                 mlog_errno(status);
1960                 goto leave;
1961         }
1962
1963         /* do the i_nlink dance! :) */
1964         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
1965         if (S_ISDIR(inode->i_mode))
1966                 le16_add_cpu(&orphan_fe->i_links_count, -1);
1967         orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count);
1968
1969         status = ocfs2_journal_dirty(handle, orphan_dir_bh);
1970         if (status < 0) {
1971                 mlog_errno(status);
1972                 goto leave;
1973         }
1974
1975 leave:
1976         brelse(target_de_bh);
1977
1978         mlog_exit(status);
1979         return status;
1980 }
1981
1982 const struct inode_operations ocfs2_dir_iops = {
1983         .create         = ocfs2_create,
1984         .lookup         = ocfs2_lookup,
1985         .link           = ocfs2_link,
1986         .unlink         = ocfs2_unlink,
1987         .rmdir          = ocfs2_unlink,
1988         .symlink        = ocfs2_symlink,
1989         .mkdir          = ocfs2_mkdir,
1990         .mknod          = ocfs2_mknod,
1991         .rename         = ocfs2_rename,
1992         .setattr        = ocfs2_setattr,
1993         .getattr        = ocfs2_getattr,
1994         .permission     = ocfs2_permission,
1995         .setxattr       = generic_setxattr,
1996         .getxattr       = generic_getxattr,
1997         .listxattr      = ocfs2_listxattr,
1998         .removexattr    = generic_removexattr,
1999 };