release/src-rt-6.x.4708/linux/linux-2.6.36/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 <linux/smp_lock.h>
  10 #include "hpfs_fn.h"
  11
  12 static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
  13 {
  14         const unsigned char *name = dentry->d_name.name;
  15         unsigned len = dentry->d_name.len;
  16         struct quad_buffer_head qbh0;
  17         struct buffer_head *bh;
  18         struct hpfs_dirent *de;
  19         struct fnode *fnode;
  20         struct dnode *dnode;
  21         struct inode *result;
  22         fnode_secno fno;
  23         dnode_secno dno;
  24         int r;
  25         struct hpfs_dirent dee;
  26         int err;
  27         if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
  28         lock_kernel();
  29         err = -ENOSPC;
  30         fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
  31         if (!fnode)
  32                 goto bail;
  33         dnode = hpfs_alloc_dnode(dir->i_sb, fno, &dno, &qbh0, 1);
  34         if (!dnode)
  35                 goto bail1;
  36         memset(&dee, 0, sizeof dee);
  37         dee.directory = 1;
  38         if (!(mode & 0222)) dee.read_only = 1;
  39         /*dee.archive = 0;*/
  40         dee.hidden = name[0] == '.';
  41         dee.fnode = fno;
  42         dee.creation_date = dee.write_date = dee.read_date = gmt_to_local(dir->i_sb, get_seconds());
  43         result = new_inode(dir->i_sb);
  44         if (!result)
  45                 goto bail2;
  46         hpfs_init_inode(result);
  47         result->i_ino = fno;
  48         hpfs_i(result)->i_parent_dir = dir->i_ino;
  49         hpfs_i(result)->i_dno = dno;
  50         result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, dee.creation_date);
  51         result->i_ctime.tv_nsec = 0;
  52         result->i_mtime.tv_nsec = 0;
  53         result->i_atime.tv_nsec = 0;
  54         hpfs_i(result)->i_ea_size = 0;
  55         result->i_mode |= S_IFDIR;
  56         result->i_op = &hpfs_dir_iops;
  57         result->i_fop = &hpfs_dir_ops;
  58         result->i_blocks = 4;
  59         result->i_size = 2048;
  60         result->i_nlink = 2;
  61         if (dee.read_only)
  62                 result->i_mode &= ~0222;
  63
  64         mutex_lock(&hpfs_i(dir)->i_mutex);
  65         r = hpfs_add_dirent(dir, name, len, &dee, 0);
  66         if (r == 1)
  67                 goto bail3;
  68         if (r == -1) {
  69                 err = -EEXIST;
  70                 goto bail3;
  71         }
  72         fnode->len = len;
  73         memcpy(fnode->name, name, len > 15 ? 15 : len);
  74         fnode->up = dir->i_ino;
  75         fnode->dirflag = 1;
  76         fnode->btree.n_free_nodes = 7;
  77         fnode->btree.n_used_nodes = 1;
  78         fnode->btree.first_free = 0x14;
  79         fnode->u.external[0].disk_secno = dno;
  80         fnode->u.external[0].file_secno = -1;
  81         dnode->root_dnode = 1;
  82         dnode->up = fno;
  83         de = hpfs_add_de(dir->i_sb, dnode, "\001\001", 2, 0);
  84         de->creation_date = de->write_date = de->read_date = gmt_to_local(dir->i_sb, get_seconds());
  85         if (!(mode & 0222)) de->read_only = 1;
  86         de->first = de->directory = 1;
  87         /*de->hidden = de->system = 0;*/
  88         de->fnode = fno;
  89         mark_buffer_dirty(bh);
  90         brelse(bh);
  91         hpfs_mark_4buffers_dirty(&qbh0);
  92         hpfs_brelse4(&qbh0);
  93         inc_nlink(dir);
  94         insert_inode_hash(result);
  95
  96         if (result->i_uid != current_fsuid() ||
  97             result->i_gid != current_fsgid() ||
  98             result->i_mode != (mode | S_IFDIR)) {
  99                 result->i_uid = current_fsuid();
 100                 result->i_gid = current_fsgid();
 101                 result->i_mode = mode | S_IFDIR;
 102                 hpfs_write_inode_nolock(result);
 103         }
 104         d_instantiate(dentry, result);
 105         mutex_unlock(&hpfs_i(dir)->i_mutex);
 106         unlock_kernel();
 107         return 0;
 108 bail3:
 109         mutex_unlock(&hpfs_i(dir)->i_mutex);
 110         iput(result);
 111 bail2:
 112         hpfs_brelse4(&qbh0);
 113         hpfs_free_dnode(dir->i_sb, dno);
 114 bail1:
 115         brelse(bh);
 116         hpfs_free_sectors(dir->i_sb, fno, 1);
 117 bail:
 118         unlock_kernel();
 119         return err;
 120 }
 121
 122 static int hpfs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd)
 123 {
 124         const unsigned char *name = dentry->d_name.name;
 125         unsigned len = dentry->d_name.len;
 126         struct inode *result = NULL;
 127         struct buffer_head *bh;
 128         struct fnode *fnode;
 129         fnode_secno fno;
 130         int r;
 131         struct hpfs_dirent dee;
 132         int err;
 133         if ((err = hpfs_chk_name(name, &len)))
 134                 return err==-ENOENT ? -EINVAL : err;
 135         lock_kernel();
 136         err = -ENOSPC;
 137         fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
 138         if (!fnode)
 139                 goto bail;
 140         memset(&dee, 0, sizeof dee);
 141         if (!(mode & 0222)) dee.read_only = 1;
 142         dee.archive = 1;
 143         dee.hidden = name[0] == '.';
 144         dee.fnode = fno;
 145         dee.creation_date = dee.write_date = dee.read_date = gmt_to_local(dir->i_sb, get_seconds());
 146
 147         result = new_inode(dir->i_sb);
 148         if (!result)
 149                 goto bail1;
 150
 151         hpfs_init_inode(result);
 152         result->i_ino = fno;
 153         result->i_mode |= S_IFREG;
 154         result->i_mode &= ~0111;
 155         result->i_op = &hpfs_file_iops;
 156         result->i_fop = &hpfs_file_ops;
 157         result->i_nlink = 1;
 158         hpfs_decide_conv(result, name, len);
 159         hpfs_i(result)->i_parent_dir = dir->i_ino;
 160         result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, dee.creation_date);
 161         result->i_ctime.tv_nsec = 0;
 162         result->i_mtime.tv_nsec = 0;
 163         result->i_atime.tv_nsec = 0;
 164         hpfs_i(result)->i_ea_size = 0;
 165         if (dee.read_only)
 166                 result->i_mode &= ~0222;
 167         result->i_blocks = 1;
 168         result->i_size = 0;
 169         result->i_data.a_ops = &hpfs_aops;
 170         hpfs_i(result)->mmu_private = 0;
 171
 172         mutex_lock(&hpfs_i(dir)->i_mutex);
 173         r = hpfs_add_dirent(dir, name, len, &dee, 0);
 174         if (r == 1)
 175                 goto bail2;
 176         if (r == -1) {
 177                 err = -EEXIST;
 178                 goto bail2;
 179         }
 180         fnode->len = len;
 181         memcpy(fnode->name, name, len > 15 ? 15 : len);
 182         fnode->up = dir->i_ino;
 183         mark_buffer_dirty(bh);
 184         brelse(bh);
 185
 186         insert_inode_hash(result);
 187
 188         if (result->i_uid != current_fsuid() ||
 189             result->i_gid != current_fsgid() ||
 190             result->i_mode != (mode | S_IFREG)) {
 191                 result->i_uid = current_fsuid();
 192                 result->i_gid = current_fsgid();
 193                 result->i_mode = mode | S_IFREG;
 194                 hpfs_write_inode_nolock(result);
 195         }
 196         d_instantiate(dentry, result);
 197         mutex_unlock(&hpfs_i(dir)->i_mutex);
 198         unlock_kernel();
 199         return 0;
 200
 201 bail2:
 202         mutex_unlock(&hpfs_i(dir)->i_mutex);
 203         iput(result);
 204 bail1:
 205         brelse(bh);
 206         hpfs_free_sectors(dir->i_sb, fno, 1);
 207 bail:
 208         unlock_kernel();
 209         return err;
 210 }
 211
 212 static int hpfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
 213 {
 214         const unsigned char *name = dentry->d_name.name;
 215         unsigned len = dentry->d_name.len;
 216         struct buffer_head *bh;
 217         struct fnode *fnode;
 218         fnode_secno fno;
 219         int r;
 220         struct hpfs_dirent dee;
 221         struct inode *result = NULL;
 222         int err;
 223         if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
 224         if (hpfs_sb(dir->i_sb)->sb_eas < 2) return -EPERM;
 225         if (!new_valid_dev(rdev))
 226                 return -EINVAL;
 227         lock_kernel();
 228         err = -ENOSPC;
 229         fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
 230         if (!fnode)
 231                 goto bail;
 232         memset(&dee, 0, sizeof dee);
 233         if (!(mode & 0222)) dee.read_only = 1;
 234         dee.archive = 1;
 235         dee.hidden = name[0] == '.';
 236         dee.fnode = fno;
 237         dee.creation_date = dee.write_date = dee.read_date = gmt_to_local(dir->i_sb, get_seconds());
 238
 239         result = new_inode(dir->i_sb);
 240         if (!result)
 241                 goto bail1;
 242
 243         hpfs_init_inode(result);
 244         result->i_ino = fno;
 245         hpfs_i(result)->i_parent_dir = dir->i_ino;
 246         result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, dee.creation_date);
 247         result->i_ctime.tv_nsec = 0;
 248         result->i_mtime.tv_nsec = 0;
 249         result->i_atime.tv_nsec = 0;
 250         hpfs_i(result)->i_ea_size = 0;
 251         result->i_uid = current_fsuid();
 252         result->i_gid = current_fsgid();
 253         result->i_nlink = 1;
 254         result->i_size = 0;
 255         result->i_blocks = 1;
 256         init_special_inode(result, mode, rdev);
 257
 258         mutex_lock(&hpfs_i(dir)->i_mutex);
 259         r = hpfs_add_dirent(dir, name, len, &dee, 0);
 260         if (r == 1)
 261                 goto bail2;
 262         if (r == -1) {
 263                 err = -EEXIST;
 264                 goto bail2;
 265         }
 266         fnode->len = len;
 267         memcpy(fnode->name, name, len > 15 ? 15 : len);
 268         fnode->up = dir->i_ino;
 269         mark_buffer_dirty(bh);
 270
 271         insert_inode_hash(result);
 272
 273         hpfs_write_inode_nolock(result);
 274         d_instantiate(dentry, result);
 275         mutex_unlock(&hpfs_i(dir)->i_mutex);
 276         brelse(bh);
 277         unlock_kernel();
 278         return 0;
 279 bail2:
 280         mutex_unlock(&hpfs_i(dir)->i_mutex);
 281         iput(result);
 282 bail1:
 283         brelse(bh);
 284         hpfs_free_sectors(dir->i_sb, fno, 1);
 285 bail:
 286         unlock_kernel();
 287         return err;
 288 }
 289
 290 static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *symlink)
 291 {
 292         const unsigned char *name = dentry->d_name.name;
 293         unsigned len = dentry->d_name.len;
 294         struct buffer_head *bh;
 295         struct fnode *fnode;
 296         fnode_secno fno;
 297         int r;
 298         struct hpfs_dirent dee;
 299         struct inode *result;
 300         int err;
 301         if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
 302         lock_kernel();
 303         if (hpfs_sb(dir->i_sb)->sb_eas < 2) {
 304                 unlock_kernel();
 305                 return -EPERM;
 306         }
 307         err = -ENOSPC;
 308         fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
 309         if (!fnode)
 310                 goto bail;
 311         memset(&dee, 0, sizeof dee);
 312         dee.archive = 1;
 313         dee.hidden = name[0] == '.';
 314         dee.fnode = fno;
 315         dee.creation_date = dee.write_date = dee.read_date = gmt_to_local(dir->i_sb, get_seconds());
 316
 317         result = new_inode(dir->i_sb);
 318         if (!result)
 319                 goto bail1;
 320         result->i_ino = fno;
 321         hpfs_init_inode(result);
 322         hpfs_i(result)->i_parent_dir = dir->i_ino;
 323         result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, dee.creation_date);
 324         result->i_ctime.tv_nsec = 0;
 325         result->i_mtime.tv_nsec = 0;
 326         result->i_atime.tv_nsec = 0;
 327         hpfs_i(result)->i_ea_size = 0;
 328         result->i_mode = S_IFLNK | 0777;
 329         result->i_uid = current_fsuid();
 330         result->i_gid = current_fsgid();
 331         result->i_blocks = 1;
 332         result->i_nlink = 1;
 333         result->i_size = strlen(symlink);
 334         result->i_op = &page_symlink_inode_operations;
 335         result->i_data.a_ops = &hpfs_symlink_aops;
 336
 337         mutex_lock(&hpfs_i(dir)->i_mutex);
 338         r = hpfs_add_dirent(dir, name, len, &dee, 0);
 339         if (r == 1)
 340                 goto bail2;
 341         if (r == -1) {
 342                 err = -EEXIST;
 343                 goto bail2;
 344         }
 345         fnode->len = len;
 346         memcpy(fnode->name, name, len > 15 ? 15 : len);
 347         fnode->up = dir->i_ino;
 348         hpfs_set_ea(result, fnode, "SYMLINK", symlink, strlen(symlink));
 349         mark_buffer_dirty(bh);
 350         brelse(bh);
 351
 352         insert_inode_hash(result);
 353
 354         hpfs_write_inode_nolock(result);
 355         d_instantiate(dentry, result);
 356         mutex_unlock(&hpfs_i(dir)->i_mutex);
 357         unlock_kernel();
 358         return 0;
 359 bail2:
 360         mutex_unlock(&hpfs_i(dir)->i_mutex);
 361         iput(result);
 362 bail1:
 363         brelse(bh);
 364         hpfs_free_sectors(dir->i_sb, fno, 1);
 365 bail:
 366         unlock_kernel();
 367         return err;
 368 }
 369
 370 static int hpfs_unlink(struct inode *dir, struct dentry *dentry)
 371 {
 372         const unsigned char *name = dentry->d_name.name;
 373         unsigned len = dentry->d_name.len;
 374         struct quad_buffer_head qbh;
 375         struct hpfs_dirent *de;
 376         struct inode *inode = dentry->d_inode;
 377         dnode_secno dno;
 378         fnode_secno fno;
 379         int r;
 380         int rep = 0;
 381         int err;
 382
 383         lock_kernel();
 384         hpfs_adjust_length(name, &len);
 385 again:
 386         mutex_lock(&hpfs_i(inode)->i_parent_mutex);
 387         mutex_lock(&hpfs_i(dir)->i_mutex);
 388         err = -ENOENT;
 389         de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
 390         if (!de)
 391                 goto out;
 392
 393         err = -EPERM;
 394         if (de->first)
 395                 goto out1;
 396
 397         err = -EISDIR;
 398         if (de->directory)
 399                 goto out1;
 400
 401         fno = de->fnode;
 402         r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
 403         switch (r) {
 404         case 1:
 405                 hpfs_error(dir->i_sb, "there was error when removing dirent");
 406                 err = -EFSERROR;
 407                 break;
 408         case 2:         /* no space for deleting, try to truncate file */
 409
 410                 err = -ENOSPC;
 411                 if (rep++)
 412                         break;
 413
 414                 mutex_unlock(&hpfs_i(dir)->i_mutex);
 415                 mutex_unlock(&hpfs_i(inode)->i_parent_mutex);
 416                 dentry_unhash(dentry);
 417                 if (!d_unhashed(dentry)) {
 418                         dput(dentry);
 419                         unlock_kernel();
 420                         return -ENOSPC;
 421                 }
 422                 if (generic_permission(inode, MAY_WRITE, NULL) ||
 423                     !S_ISREG(inode->i_mode) ||
 424                     get_write_access(inode)) {
 425                         d_rehash(dentry);
 426                         dput(dentry);
 427                 } else {
 428                         struct iattr newattrs;
 429                         /*printk("HPFS: truncating file before delete.\n");*/
 430                         newattrs.ia_size = 0;
 431                         newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
 432                         err = notify_change(dentry, &newattrs);
 433                         put_write_access(inode);
 434                         dput(dentry);
 435                         if (!err)
 436                                 goto again;
 437                 }
 438                 unlock_kernel();
 439                 return -ENOSPC;
 440         default:
 441                 drop_nlink(inode);
 442                 err = 0;
 443         }
 444         goto out;
 445
 446 out1:
 447         hpfs_brelse4(&qbh);
 448 out:
 449         mutex_unlock(&hpfs_i(dir)->i_mutex);
 450         mutex_unlock(&hpfs_i(inode)->i_parent_mutex);
 451         unlock_kernel();
 452         return err;
 453 }
 454
 455 static int hpfs_rmdir(struct inode *dir, struct dentry *dentry)
 456 {
 457         const unsigned char *name = dentry->d_name.name;
 458         unsigned len = dentry->d_name.len;
 459         struct quad_buffer_head qbh;
 460         struct hpfs_dirent *de;
 461         struct inode *inode = dentry->d_inode;
 462         dnode_secno dno;
 463         fnode_secno fno;
 464         int n_items = 0;
 465         int err;
 466         int r;
 467
 468         hpfs_adjust_length(name, &len);
 469         lock_kernel();
 470         mutex_lock(&hpfs_i(inode)->i_parent_mutex);
 471         mutex_lock(&hpfs_i(dir)->i_mutex);
 472         err = -ENOENT;
 473         de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
 474         if (!de)
 475                 goto out;
 476
 477         err = -EPERM;
 478         if (de->first)
 479                 goto out1;
 480
 481         err = -ENOTDIR;
 482         if (!de->directory)
 483                 goto out1;
 484
 485         hpfs_count_dnodes(dir->i_sb, hpfs_i(inode)->i_dno, NULL, NULL, &n_items);
 486         err = -ENOTEMPTY;
 487         if (n_items)
 488                 goto out1;
 489
 490         fno = de->fnode;
 491         r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
 492         switch (r) {
 493         case 1:
 494                 hpfs_error(dir->i_sb, "there was error when removing dirent");
 495                 err = -EFSERROR;
 496                 break;
 497         case 2:
 498                 err = -ENOSPC;
 499                 break;
 500         default:
 501                 drop_nlink(dir);
 502                 clear_nlink(inode);
 503                 err = 0;
 504         }
 505         goto out;
 506 out1:
 507         hpfs_brelse4(&qbh);
 508 out:
 509         mutex_unlock(&hpfs_i(dir)->i_mutex);
 510         mutex_unlock(&hpfs_i(inode)->i_parent_mutex);
 511         unlock_kernel();
 512         return err;
 513 }
 514
 515 static int hpfs_symlink_readpage(struct file *file, struct page *page)
 516 {
 517         char *link = kmap(page);
 518         struct inode *i = page->mapping->host;
 519         struct fnode *fnode;
 520         struct buffer_head *bh;
 521         int err;
 522
 523         err = -EIO;
 524         lock_kernel();
 525         if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh)))
 526                 goto fail;
 527         err = hpfs_read_ea(i->i_sb, fnode, "SYMLINK", link, PAGE_SIZE);
 528         brelse(bh);
 529         if (err)
 530                 goto fail;
 531         unlock_kernel();
 532         SetPageUptodate(page);
 533         kunmap(page);
 534         unlock_page(page);
 535         return 0;
 536
 537 fail:
 538         unlock_kernel();
 539         SetPageError(page);
 540         kunmap(page);
 541         unlock_page(page);
 542         return err;
 543 }
 544
 545 const struct address_space_operations hpfs_symlink_aops = {
 546         .readpage       = hpfs_symlink_readpage
 547 };
 548
 549 static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 550                 struct inode *new_dir, struct dentry *new_dentry)
 551 {
 552         const unsigned char *old_name = old_dentry->d_name.name;
 553         unsigned old_len = old_dentry->d_name.len;
 554         const unsigned char *new_name = new_dentry->d_name.name;
 555         unsigned new_len = new_dentry->d_name.len;
 556         struct inode *i = old_dentry->d_inode;
 557         struct inode *new_inode = new_dentry->d_inode;
 558         struct quad_buffer_head qbh, qbh1;
 559         struct hpfs_dirent *dep, *nde;
 560         struct hpfs_dirent de;
 561         dnode_secno dno;
 562         int r;
 563         struct buffer_head *bh;
 564         struct fnode *fnode;
 565         int err;
 566         if ((err = hpfs_chk_name(new_name, &new_len))) return err;
 567         err = 0;
 568         hpfs_adjust_length(old_name, &old_len);
 569
 570         lock_kernel();
 571         /* order doesn't matter, due to VFS exclusion */
 572         mutex_lock(&hpfs_i(i)->i_parent_mutex);
 573         if (new_inode)
 574                 mutex_lock(&hpfs_i(new_inode)->i_parent_mutex);
 575         mutex_lock(&hpfs_i(old_dir)->i_mutex);
 576         if (new_dir != old_dir)
 577                 mutex_lock(&hpfs_i(new_dir)->i_mutex);
 578
 579         /* Erm? Moving over the empty non-busy directory is perfectly legal */
 580         if (new_inode && S_ISDIR(new_inode->i_mode)) {
 581                 err = -EINVAL;
 582                 goto end1;
 583         }
 584
 585         if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
 586                 hpfs_error(i->i_sb, "lookup succeeded but map dirent failed");
 587                 err = -ENOENT;
 588                 goto end1;
 589         }
 590         copy_de(&de, dep);
 591         de.hidden = new_name[0] == '.';
 592
 593         if (new_inode) {
 594                 int r;
 595                 if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 1)) != 2) {
 596                         if ((nde = map_dirent(new_dir, hpfs_i(new_dir)->i_dno, new_name, new_len, NULL, &qbh1))) {
 597                                 clear_nlink(new_inode);
 598                                 copy_de(nde, &de);
 599                                 memcpy(nde->name, new_name, new_len);
 600                                 hpfs_mark_4buffers_dirty(&qbh1);
 601                                 hpfs_brelse4(&qbh1);
 602                                 goto end;
 603                         }
 604                         hpfs_error(new_dir->i_sb, "hpfs_rename: could not find dirent");
 605                         err = -EFSERROR;
 606                         goto end1;
 607                 }
 608                 err = r == 2 ? -ENOSPC : r == 1 ? -EFSERROR : 0;
 609                 goto end1;
 610         }
 611
 612         if (new_dir == old_dir) hpfs_brelse4(&qbh);
 613
 614         hpfs_lock_creation(i->i_sb);
 615         if ((r = hpfs_add_dirent(new_dir, new_name, new_len, &de, 1))) {
 616                 hpfs_unlock_creation(i->i_sb);
 617                 if (r == -1) hpfs_error(new_dir->i_sb, "hpfs_rename: dirent already exists!");
 618                 err = r == 1 ? -ENOSPC : -EFSERROR;
 619                 if (new_dir != old_dir) hpfs_brelse4(&qbh);
 620                 goto end1;
 621         }
 622
 623         if (new_dir == old_dir)
 624                 if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
 625                         hpfs_unlock_creation(i->i_sb);
 626                         hpfs_error(i->i_sb, "lookup succeeded but map dirent failed at #2");
 627                         err = -ENOENT;
 628                         goto end1;
 629                 }
 630
 631         if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 0))) {
 632                 hpfs_unlock_creation(i->i_sb);
 633                 hpfs_error(i->i_sb, "hpfs_rename: could not remove dirent");
 634                 err = r == 2 ? -ENOSPC : -EFSERROR;
 635                 goto end1;
 636         }
 637         hpfs_unlock_creation(i->i_sb);
 638
 639         end:
 640         hpfs_i(i)->i_parent_dir = new_dir->i_ino;
 641         if (S_ISDIR(i->i_mode)) {
 642                 inc_nlink(new_dir);
 643                 drop_nlink(old_dir);
 644         }
 645         if ((fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) {
 646                 fnode->up = new_dir->i_ino;
 647                 fnode->len = new_len;
 648                 memcpy(fnode->name, new_name, new_len>15?15:new_len);
 649                 if (new_len < 15) memset(&fnode->name[new_len], 0, 15 - new_len);
 650                 mark_buffer_dirty(bh);
 651                 brelse(bh);
 652         }
 653         hpfs_i(i)->i_conv = hpfs_sb(i->i_sb)->sb_conv;
 654         hpfs_decide_conv(i, new_name, new_len);
 655 end1:
 656         if (old_dir != new_dir)
 657                 mutex_unlock(&hpfs_i(new_dir)->i_mutex);
 658         mutex_unlock(&hpfs_i(old_dir)->i_mutex);
 659         mutex_unlock(&hpfs_i(i)->i_parent_mutex);
 660         if (new_inode)
 661                 mutex_unlock(&hpfs_i(new_inode)->i_parent_mutex);
 662         unlock_kernel();
 663         return err;
 664 }
 665
 666 const struct inode_operations hpfs_dir_iops =
 667 {
 668         .create         = hpfs_create,
 669         .lookup         = hpfs_lookup,
 670         .unlink         = hpfs_unlink,
 671         .symlink        = hpfs_symlink,
 672         .mkdir          = hpfs_mkdir,
 673         .rmdir          = hpfs_rmdir,
 674         .mknod          = hpfs_mknod,
 675         .rename         = hpfs_rename,
 676         .setattr        = hpfs_setattr,
 677 };