fs/hpfs/namei.c

   1 /*
   2  *  linux/fs/hpfs/namei.c
   3  *
   4  *  Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
   5  *
   6  *  adding & removing files & directories
   7  */
   8 #include <linux/sched.h>
   9 #include "hpfs_fn.h"
  10
  11 static void hpfs_update_directory_times(struct inode *dir)
  12 {
  13         time_t t = get_seconds();
  14         if (t == dir->i_mtime.tv_sec &&
  15             t == dir->i_ctime.tv_sec)
  16                 return;
  17         dir->i_mtime.tv_sec = dir->i_ctime.tv_sec = t;
  18         dir->i_mtime.tv_nsec = dir->i_ctime.tv_nsec = 0;
  19         hpfs_write_inode_nolock(dir);
  20 }
  21
  22 static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
  23 {
  24         const unsigned char *name = dentry->d_name.name;
  25         unsigned len = dentry->d_name.len;
  26         struct quad_buffer_head qbh0;
  27         struct buffer_head *bh;
  28         struct hpfs_dirent *de;
  29         struct fnode *fnode;
  30         struct dnode *dnode;
  31         struct inode *result;
  32         fnode_secno fno;
  33         dnode_secno dno;
  34         int r;
  35         struct hpfs_dirent dee;
  36         int err;
  37         if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
  38         hpfs_lock(dir->i_sb);
  39         err = -ENOSPC;
  40         fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
  41         if (!fnode)
  42                 goto bail;
  43         dnode = hpfs_alloc_dnode(dir->i_sb, fno, &dno, &qbh0);
  44         if (!dnode)
  45                 goto bail1;
  46         memset(&dee, 0, sizeof dee);
  47         dee.directory = 1;
  48         if (!(mode & 0222)) dee.read_only = 1;
  49         /*dee.archive = 0;*/
  50         dee.hidden = name[0] == '.';
  51         dee.fnode = cpu_to_le32(fno);
  52         dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
  53         result = new_inode(dir->i_sb);
  54         if (!result)
  55                 goto bail2;
  56         hpfs_init_inode(result);
  57         result->i_ino = fno;
  58         hpfs_i(result)->i_parent_dir = dir->i_ino;
  59         hpfs_i(result)->i_dno = dno;
  60         result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
  61         result->i_ctime.tv_nsec = 0;
  62         result->i_mtime.tv_nsec = 0;
  63         result->i_atime.tv_nsec = 0;
  64         hpfs_i(result)->i_ea_size = 0;
  65         result->i_mode |= S_IFDIR;
  66         result->i_op = &hpfs_dir_iops;
  67         result->i_fop = &hpfs_dir_ops;
  68         result->i_blocks = 4;
  69         result->i_size = 2048;
  70         set_nlink(result, 2);
  71         if (dee.read_only)
  72                 result->i_mode &= ~0222;
  73
  74         r = hpfs_add_dirent(dir, name, len, &dee);
  75         if (r == 1)
  76                 goto bail3;
  77         if (r == -1) {
  78                 err = -EEXIST;
  79                 goto bail3;
  80         }
  81         fnode->len = len;
  82         memcpy(fnode->name, name, len > 15 ? 15 : len);
  83         fnode->up = cpu_to_le32(dir->i_ino);
  84         fnode->flags |= FNODE_dir;
  85         fnode->btree.n_free_nodes = 7;
  86         fnode->btree.n_used_nodes = 1;
  87         fnode->btree.first_free = cpu_to_le16(0x14);
  88         fnode->u.external[0].disk_secno = cpu_to_le32(dno);
  89         fnode->u.external[0].file_secno = cpu_to_le32(-1);
  90         dnode->root_dnode = 1;
  91         dnode->up = cpu_to_le32(fno);
  92         de = hpfs_add_de(dir->i_sb, dnode, "\001\001", 2, 0);
  93         de->creation_date = de->write_date = de->read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
  94         if (!(mode & 0222)) de->read_only = 1;
  95         de->first = de->directory = 1;
  96         /*de->hidden = de->system = 0;*/
  97         de->fnode = cpu_to_le32(fno);
  98         mark_buffer_dirty(bh);
  99         brelse(bh);
 100         hpfs_mark_4buffers_dirty(&qbh0);
 101         hpfs_brelse4(&qbh0);
 102         inc_nlink(dir);
 103         insert_inode_hash(result);
 104
 105         if (!uid_eq(result->i_uid, current_fsuid()) ||
 106             !gid_eq(result->i_gid, current_fsgid()) ||
 107             result->i_mode != (mode | S_IFDIR)) {
 108                 result->i_uid = current_fsuid();
 109                 result->i_gid = current_fsgid();
 110                 result->i_mode = mode | S_IFDIR;
 111                 hpfs_write_inode_nolock(result);
 112         }
 113         hpfs_update_directory_times(dir);
 114         d_instantiate(dentry, result);
 115         hpfs_unlock(dir->i_sb);
 116         return 0;
 117 bail3:
 118         iput(result);
 119 bail2:
 120         hpfs_brelse4(&qbh0);
 121         hpfs_free_dnode(dir->i_sb, dno);
 122 bail1:
 123         brelse(bh);
 124         hpfs_free_sectors(dir->i_sb, fno, 1);
 125 bail:
 126         hpfs_unlock(dir->i_sb);
 127         return err;
 128 }
 129
 130 static int hpfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl)
 131 {
 132         const unsigned char *name = dentry->d_name.name;
 133         unsigned len = dentry->d_name.len;
 134         struct inode *result = NULL;
 135         struct buffer_head *bh;
 136         struct fnode *fnode;
 137         fnode_secno fno;
 138         int r;
 139         struct hpfs_dirent dee;
 140         int err;
 141         if ((err = hpfs_chk_name(name, &len)))
 142                 return err==-ENOENT ? -EINVAL : err;
 143         hpfs_lock(dir->i_sb);
 144         err = -ENOSPC;
 145         fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
 146         if (!fnode)
 147                 goto bail;
 148         memset(&dee, 0, sizeof dee);
 149         if (!(mode & 0222)) dee.read_only = 1;
 150         dee.archive = 1;
 151         dee.hidden = name[0] == '.';
 152         dee.fnode = cpu_to_le32(fno);
 153         dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
 154
 155         result = new_inode(dir->i_sb);
 156         if (!result)
 157                 goto bail1;
 158
 159         hpfs_init_inode(result);
 160         result->i_ino = fno;
 161         result->i_mode |= S_IFREG;
 162         result->i_mode &= ~0111;
 163         result->i_op = &hpfs_file_iops;
 164         result->i_fop = &hpfs_file_ops;
 165         set_nlink(result, 1);
 166         hpfs_i(result)->i_parent_dir = dir->i_ino;
 167         result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
 168         result->i_ctime.tv_nsec = 0;
 169         result->i_mtime.tv_nsec = 0;
 170         result->i_atime.tv_nsec = 0;
 171         hpfs_i(result)->i_ea_size = 0;
 172         if (dee.read_only)
 173                 result->i_mode &= ~0222;
 174         result->i_blocks = 1;
 175         result->i_size = 0;
 176         result->i_data.a_ops = &hpfs_aops;
 177         hpfs_i(result)->mmu_private = 0;
 178
 179         r = hpfs_add_dirent(dir, name, len, &dee);
 180         if (r == 1)
 181                 goto bail2;
 182         if (r == -1) {
 183                 err = -EEXIST;
 184                 goto bail2;
 185         }
 186         fnode->len = len;
 187         memcpy(fnode->name, name, len > 15 ? 15 : len);
 188         fnode->up = cpu_to_le32(dir->i_ino);
 189         mark_buffer_dirty(bh);
 190         brelse(bh);
 191
 192         insert_inode_hash(result);
 193
 194         if (!uid_eq(result->i_uid, current_fsuid()) ||
 195             !gid_eq(result->i_gid, current_fsgid()) ||
 196             result->i_mode != (mode | S_IFREG)) {
 197                 result->i_uid = current_fsuid();
 198                 result->i_gid = current_fsgid();
 199                 result->i_mode = mode | S_IFREG;
 200                 hpfs_write_inode_nolock(result);
 201         }
 202         hpfs_update_directory_times(dir);
 203         d_instantiate(dentry, result);
 204         hpfs_unlock(dir->i_sb);
 205         return 0;
 206
 207 bail2:
 208         iput(result);
 209 bail1:
 210         brelse(bh);
 211         hpfs_free_sectors(dir->i_sb, fno, 1);
 212 bail:
 213         hpfs_unlock(dir->i_sb);
 214         return err;
 215 }
 216
 217 static int hpfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
 218 {
 219         const unsigned char *name = dentry->d_name.name;
 220         unsigned len = dentry->d_name.len;
 221         struct buffer_head *bh;
 222         struct fnode *fnode;
 223         fnode_secno fno;
 224         int r;
 225         struct hpfs_dirent dee;
 226         struct inode *result = NULL;
 227         int err;
 228         if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
 229         if (hpfs_sb(dir->i_sb)->sb_eas < 2) return -EPERM;
 230         if (!new_valid_dev(rdev))
 231                 return -EINVAL;
 232         hpfs_lock(dir->i_sb);
 233         err = -ENOSPC;
 234         fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
 235         if (!fnode)
 236                 goto bail;
 237         memset(&dee, 0, sizeof dee);
 238         if (!(mode & 0222)) dee.read_only = 1;
 239         dee.archive = 1;
 240         dee.hidden = name[0] == '.';
 241         dee.fnode = cpu_to_le32(fno);
 242         dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
 243
 244         result = new_inode(dir->i_sb);
 245         if (!result)
 246                 goto bail1;
 247
 248         hpfs_init_inode(result);
 249         result->i_ino = fno;
 250         hpfs_i(result)->i_parent_dir = dir->i_ino;
 251         result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
 252         result->i_ctime.tv_nsec = 0;
 253         result->i_mtime.tv_nsec = 0;
 254         result->i_atime.tv_nsec = 0;
 255         hpfs_i(result)->i_ea_size = 0;
 256         result->i_uid = current_fsuid();
 257         result->i_gid = current_fsgid();
 258         set_nlink(result, 1);
 259         result->i_size = 0;
 260         result->i_blocks = 1;
 261         init_special_inode(result, mode, rdev);
 262
 263         r = hpfs_add_dirent(dir, name, len, &dee);
 264         if (r == 1)
 265                 goto bail2;
 266         if (r == -1) {
 267                 err = -EEXIST;
 268                 goto bail2;
 269         }
 270         fnode->len = len;
 271         memcpy(fnode->name, name, len > 15 ? 15 : len);
 272         fnode->up = cpu_to_le32(dir->i_ino);
 273         mark_buffer_dirty(bh);
 274
 275         insert_inode_hash(result);
 276
 277         hpfs_write_inode_nolock(result);
 278         hpfs_update_directory_times(dir);
 279         d_instantiate(dentry, result);
 280         brelse(bh);
 281         hpfs_unlock(dir->i_sb);
 282         return 0;
 283 bail2:
 284         iput(result);
 285 bail1:
 286         brelse(bh);
 287         hpfs_free_sectors(dir->i_sb, fno, 1);
 288 bail:
 289         hpfs_unlock(dir->i_sb);
 290         return err;
 291 }
 292
 293 static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *symlink)
 294 {
 295         const unsigned char *name = dentry->d_name.name;
 296         unsigned len = dentry->d_name.len;
 297         struct buffer_head *bh;
 298         struct fnode *fnode;
 299         fnode_secno fno;
 300         int r;
 301         struct hpfs_dirent dee;
 302         struct inode *result;
 303         int err;
 304         if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
 305         hpfs_lock(dir->i_sb);
 306         if (hpfs_sb(dir->i_sb)->sb_eas < 2) {
 307                 hpfs_unlock(dir->i_sb);
 308                 return -EPERM;
 309         }
 310         err = -ENOSPC;
 311         fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
 312         if (!fnode)
 313                 goto bail;
 314         memset(&dee, 0, sizeof dee);
 315         dee.archive = 1;
 316         dee.hidden = name[0] == '.';
 317         dee.fnode = cpu_to_le32(fno);
 318         dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
 319
 320         result = new_inode(dir->i_sb);
 321         if (!result)
 322                 goto bail1;
 323         result->i_ino = fno;
 324         hpfs_init_inode(result);
 325         hpfs_i(result)->i_parent_dir = dir->i_ino;
 326         result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
 327         result->i_ctime.tv_nsec = 0;
 328         result->i_mtime.tv_nsec = 0;
 329         result->i_atime.tv_nsec = 0;
 330         hpfs_i(result)->i_ea_size = 0;
 331         result->i_mode = S_IFLNK | 0777;
 332         result->i_uid = current_fsuid();
 333         result->i_gid = current_fsgid();
 334         result->i_blocks = 1;
 335         set_nlink(result, 1);
 336         result->i_size = strlen(symlink);
 337         result->i_op = &page_symlink_inode_operations;
 338         result->i_data.a_ops = &hpfs_symlink_aops;
 339
 340         r = hpfs_add_dirent(dir, name, len, &dee);
 341         if (r == 1)
 342                 goto bail2;
 343         if (r == -1) {
 344                 err = -EEXIST;
 345                 goto bail2;
 346         }
 347         fnode->len = len;
 348         memcpy(fnode->name, name, len > 15 ? 15 : len);
 349         fnode->up = cpu_to_le32(dir->i_ino);
 350         hpfs_set_ea(result, fnode, "SYMLINK", symlink, strlen(symlink));
 351         mark_buffer_dirty(bh);
 352         brelse(bh);
 353
 354         insert_inode_hash(result);
 355
 356         hpfs_write_inode_nolock(result);
 357         hpfs_update_directory_times(dir);
 358         d_instantiate(dentry, result);
 359         hpfs_unlock(dir->i_sb);
 360         return 0;
 361 bail2:
 362         iput(result);
 363 bail1:
 364         brelse(bh);
 365         hpfs_free_sectors(dir->i_sb, fno, 1);
 366 bail:
 367         hpfs_unlock(dir->i_sb);
 368         return err;
 369 }
 370
 371 static int hpfs_unlink(struct inode *dir, struct dentry *dentry)
 372 {
 373         const unsigned char *name = dentry->d_name.name;
 374         unsigned len = dentry->d_name.len;
 375         struct quad_buffer_head qbh;
 376         struct hpfs_dirent *de;
 377         struct inode *inode = d_inode(dentry);
 378         dnode_secno dno;
 379         int r;
 380         int rep = 0;
 381         int err;
 382
 383         hpfs_lock(dir->i_sb);
 384         hpfs_adjust_length(name, &len);
 385 again:
 386         err = -ENOENT;
 387         de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
 388         if (!de)
 389                 goto out;
 390
 391         err = -EPERM;
 392         if (de->first)
 393                 goto out1;
 394
 395         err = -EISDIR;
 396         if (de->directory)
 397                 goto out1;
 398
 399         r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
 400         switch (r) {
 401         case 1:
 402                 hpfs_error(dir->i_sb, "there was error when removing dirent");
 403                 err = -EFSERROR;
 404                 break;
 405         case 2:         /* no space for deleting, try to truncate file */
 406
 407                 err = -ENOSPC;
 408                 if (rep++)
 409                         break;
 410
 411                 dentry_unhash(dentry);
 412                 if (!d_unhashed(dentry)) {
 413                         hpfs_unlock(dir->i_sb);
 414                         return -ENOSPC;
 415                 }
 416                 if (generic_permission(inode, MAY_WRITE) ||
 417                     !S_ISREG(inode->i_mode) ||
 418                     get_write_access(inode)) {
 419                         d_rehash(dentry);
 420                 } else {
 421                         struct iattr newattrs;
 422                         /*pr_info("truncating file before delete.\n");*/
 423                         newattrs.ia_size = 0;
 424                         newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
 425                         err = notify_change(dentry, &newattrs, NULL);
 426                         put_write_access(inode);
 427                         if (!err)
 428                                 goto again;
 429                 }
 430                 hpfs_unlock(dir->i_sb);
 431                 return -ENOSPC;
 432         default:
 433                 drop_nlink(inode);
 434                 err = 0;
 435         }
 436         goto out;
 437
 438 out1:
 439         hpfs_brelse4(&qbh);
 440 out:
 441         if (!err)
 442                 hpfs_update_directory_times(dir);
 443         hpfs_unlock(dir->i_sb);
 444         return err;
 445 }
 446
 447 static int hpfs_rmdir(struct inode *dir, struct dentry *dentry)
 448 {
 449         const unsigned char *name = dentry->d_name.name;
 450         unsigned len = dentry->d_name.len;
 451         struct quad_buffer_head qbh;
 452         struct hpfs_dirent *de;
 453         struct inode *inode = d_inode(dentry);
 454         dnode_secno dno;
 455         int n_items = 0;
 456         int err;
 457         int r;
 458
 459         hpfs_adjust_length(name, &len);
 460         hpfs_lock(dir->i_sb);
 461         err = -ENOENT;
 462         de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
 463         if (!de)
 464                 goto out;
 465
 466         err = -EPERM;
 467         if (de->first)
 468                 goto out1;
 469
 470         err = -ENOTDIR;
 471         if (!de->directory)
 472                 goto out1;
 473
 474         hpfs_count_dnodes(dir->i_sb, hpfs_i(inode)->i_dno, NULL, NULL, &n_items);
 475         err = -ENOTEMPTY;
 476         if (n_items)
 477                 goto out1;
 478
 479         r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
 480         switch (r) {
 481         case 1:
 482                 hpfs_error(dir->i_sb, "there was error when removing dirent");
 483                 err = -EFSERROR;
 484                 break;
 485         case 2:
 486                 err = -ENOSPC;
 487                 break;
 488         default:
 489                 drop_nlink(dir);
 490                 clear_nlink(inode);
 491                 err = 0;
 492         }
 493         goto out;
 494 out1:
 495         hpfs_brelse4(&qbh);
 496 out:
 497         if (!err)
 498                 hpfs_update_directory_times(dir);
 499         hpfs_unlock(dir->i_sb);
 500         return err;
 501 }
 502
 503 static int hpfs_symlink_readpage(struct file *file, struct page *page)
 504 {
 505         char *link = kmap(page);
 506         struct inode *i = page->mapping->host;
 507         struct fnode *fnode;
 508         struct buffer_head *bh;
 509         int err;
 510
 511         err = -EIO;
 512         hpfs_lock(i->i_sb);
 513         if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh)))
 514                 goto fail;
 515         err = hpfs_read_ea(i->i_sb, fnode, "SYMLINK", link, PAGE_SIZE);
 516         brelse(bh);
 517         if (err)
 518                 goto fail;
 519         hpfs_unlock(i->i_sb);
 520         SetPageUptodate(page);
 521         kunmap(page);
 522         unlock_page(page);
 523         return 0;
 524
 525 fail:
 526         hpfs_unlock(i->i_sb);
 527         SetPageError(page);
 528         kunmap(page);
 529         unlock_page(page);
 530         return err;
 531 }
 532
 533 const struct address_space_operations hpfs_symlink_aops = {
 534         .readpage       = hpfs_symlink_readpage
 535 };
 536
 537 static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 538                 struct inode *new_dir, struct dentry *new_dentry)
 539 {
 540         const unsigned char *old_name = old_dentry->d_name.name;
 541         unsigned old_len = old_dentry->d_name.len;
 542         const unsigned char *new_name = new_dentry->d_name.name;
 543         unsigned new_len = new_dentry->d_name.len;
 544         struct inode *i = d_inode(old_dentry);
 545         struct inode *new_inode = d_inode(new_dentry);
 546         struct quad_buffer_head qbh, qbh1;
 547         struct hpfs_dirent *dep, *nde;
 548         struct hpfs_dirent de;
 549         dnode_secno dno;
 550         int r;
 551         struct buffer_head *bh;
 552         struct fnode *fnode;
 553         int err;
 554
 555         if ((err = hpfs_chk_name(new_name, &new_len))) return err;
 556         err = 0;
 557         hpfs_adjust_length(old_name, &old_len);
 558
 559         hpfs_lock(i->i_sb);
 560         /* order doesn't matter, due to VFS exclusion */
 561
 562         /* Erm? Moving over the empty non-busy directory is perfectly legal */
 563         if (new_inode && S_ISDIR(new_inode->i_mode)) {
 564                 err = -EINVAL;
 565                 goto end1;
 566         }
 567
 568         if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
 569                 hpfs_error(i->i_sb, "lookup succeeded but map dirent failed");
 570                 err = -ENOENT;
 571                 goto end1;
 572         }
 573         copy_de(&de, dep);
 574         de.hidden = new_name[0] == '.';
 575
 576         if (new_inode) {
 577                 int r;
 578                 if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 1)) != 2) {
 579                         if ((nde = map_dirent(new_dir, hpfs_i(new_dir)->i_dno, new_name, new_len, NULL, &qbh1))) {
 580                                 clear_nlink(new_inode);
 581                                 copy_de(nde, &de);
 582                                 memcpy(nde->name, new_name, new_len);
 583                                 hpfs_mark_4buffers_dirty(&qbh1);
 584                                 hpfs_brelse4(&qbh1);
 585                                 goto end;
 586                         }
 587                         hpfs_error(new_dir->i_sb, "hpfs_rename: could not find dirent");
 588                         err = -EFSERROR;
 589                         goto end1;
 590                 }
 591                 err = r == 2 ? -ENOSPC : r == 1 ? -EFSERROR : 0;
 592                 goto end1;
 593         }
 594
 595         if (new_dir == old_dir) hpfs_brelse4(&qbh);
 596
 597         if ((r = hpfs_add_dirent(new_dir, new_name, new_len, &de))) {
 598                 if (r == -1) hpfs_error(new_dir->i_sb, "hpfs_rename: dirent already exists!");
 599                 err = r == 1 ? -ENOSPC : -EFSERROR;
 600                 if (new_dir != old_dir) hpfs_brelse4(&qbh);
 601                 goto end1;
 602         }
 603
 604         if (new_dir == old_dir)
 605                 if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
 606                         hpfs_error(i->i_sb, "lookup succeeded but map dirent failed at #2");
 607                         err = -ENOENT;
 608                         goto end1;
 609                 }
 610
 611         if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 0))) {
 612                 hpfs_error(i->i_sb, "hpfs_rename: could not remove dirent");
 613                 err = r == 2 ? -ENOSPC : -EFSERROR;
 614                 goto end1;
 615         }
 616
 617 end:
 618         hpfs_i(i)->i_parent_dir = new_dir->i_ino;
 619         if (S_ISDIR(i->i_mode)) {
 620                 inc_nlink(new_dir);
 621                 drop_nlink(old_dir);
 622         }
 623         if ((fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) {
 624                 fnode->up = cpu_to_le32(new_dir->i_ino);
 625                 fnode->len = new_len;
 626                 memcpy(fnode->name, new_name, new_len>15?15:new_len);
 627                 if (new_len < 15) memset(&fnode->name[new_len], 0, 15 - new_len);
 628                 mark_buffer_dirty(bh);
 629                 brelse(bh);
 630         }
 631 end1:
 632         if (!err) {
 633                 hpfs_update_directory_times(old_dir);
 634                 hpfs_update_directory_times(new_dir);
 635         }
 636         hpfs_unlock(i->i_sb);
 637         return err;
 638 }
 639
 640 const struct inode_operations hpfs_dir_iops =
 641 {
 642         .create         = hpfs_create,
 643         .lookup         = hpfs_lookup,
 644         .unlink         = hpfs_unlink,
 645         .symlink        = hpfs_symlink,
 646         .mkdir          = hpfs_mkdir,
 647         .rmdir          = hpfs_rmdir,
 648         .mknod          = hpfs_mknod,
 649         .rename         = hpfs_rename,
 650         .setattr        = hpfs_setattr,
 651 };