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