1 /* 2 * linux/fs/ext4/ioctl.c 3 * 4 * Copyright (C) 1993, 1994, 1995 5 * Remy Card (card@masi.ibp.fr) 6 * Laboratoire MASI - Institut Blaise Pascal 7 * Universite Pierre et Marie Curie (Paris VI) 8 */ 9 10 #include <linux/fs.h> 11 #include <linux/jbd2.h> 12 #include <linux/capability.h> 13 #include <linux/time.h> 14 #include <linux/compat.h> 15 #include <linux/mount.h> 16 #include <linux/file.h> 17 #include <asm/uaccess.h> 18 #include "ext4_jbd2.h" 19 #include "ext4.h" 20 21 #define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1) 22 23 /** 24 * Swap memory between @a and @b for @len bytes. 25 * 26 * @a: pointer to first memory area 27 * @b: pointer to second memory area 28 * @len: number of bytes to swap 29 * 30 */ 31 static void memswap(void *a, void *b, size_t len) 32 { 33 unsigned char *ap, *bp; 34 unsigned char tmp; 35 36 ap = (unsigned char *)a; 37 bp = (unsigned char *)b; 38 while (len-- > 0) { 39 tmp = *ap; 40 *ap = *bp; 41 *bp = tmp; 42 ap++; 43 bp++; 44 } 45 } 46 47 /** 48 * Swap i_data and associated attributes between @inode1 and @inode2. 49 * This function is used for the primary swap between inode1 and inode2 50 * and also to revert this primary swap in case of errors. 51 * 52 * Therefore you have to make sure, that calling this method twice 53 * will revert all changes. 54 * 55 * @inode1: pointer to first inode 56 * @inode2: pointer to second inode 57 */ 58 static void swap_inode_data(struct inode *inode1, struct inode *inode2) 59 { 60 loff_t isize; 61 struct ext4_inode_info *ei1; 62 struct ext4_inode_info *ei2; 63 64 ei1 = EXT4_I(inode1); 65 ei2 = EXT4_I(inode2); 66 67 memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags)); 68 memswap(&inode1->i_version, &inode2->i_version, 69 sizeof(inode1->i_version)); 70 memswap(&inode1->i_blocks, &inode2->i_blocks, 71 sizeof(inode1->i_blocks)); 72 memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes)); 73 memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime)); 74 memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime)); 75 76 memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); 77 memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags)); 78 memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize)); 79 ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); 80 ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); 81 ext4_es_lru_del(inode1); 82 ext4_es_lru_del(inode2); 83 84 isize = i_size_read(inode1); 85 i_size_write(inode1, i_size_read(inode2)); 86 i_size_write(inode2, isize); 87 } 88 89 /** 90 * Swap the information from the given @inode and the inode 91 * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other 92 * important fields of the inodes. 93 * 94 * @sb: the super block of the filesystem 95 * @inode: the inode to swap with EXT4_BOOT_LOADER_INO 96 * 97 */ 98 static long swap_inode_boot_loader(struct super_block *sb, 99 struct inode *inode) 100 { 101 handle_t *handle; 102 int err; 103 struct inode *inode_bl; 104 struct ext4_inode_info *ei_bl; 105 struct ext4_sb_info *sbi = EXT4_SB(sb); 106 107 if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) 108 return -EINVAL; 109 110 if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) 111 return -EPERM; 112 113 inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); 114 if (IS_ERR(inode_bl)) 115 return PTR_ERR(inode_bl); 116 ei_bl = EXT4_I(inode_bl); 117 118 filemap_flush(inode->i_mapping); 119 filemap_flush(inode_bl->i_mapping); 120 121 /* Protect orig inodes against a truncate and make sure, 122 * that only 1 swap_inode_boot_loader is running. */ 123 lock_two_nondirectories(inode, inode_bl); 124 125 truncate_inode_pages(&inode->i_data, 0); 126 truncate_inode_pages(&inode_bl->i_data, 0); 127 128 /* Wait for all existing dio workers */ 129 ext4_inode_block_unlocked_dio(inode); 130 ext4_inode_block_unlocked_dio(inode_bl); 131 inode_dio_wait(inode); 132 inode_dio_wait(inode_bl); 133 134 handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); 135 if (IS_ERR(handle)) { 136 err = -EINVAL; 137 goto journal_err_out; 138 } 139 140 /* Protect extent tree against block allocations via delalloc */ 141 ext4_double_down_write_data_sem(inode, inode_bl); 142 143 if (inode_bl->i_nlink == 0) { 144 /* this inode has never been used as a BOOT_LOADER */ 145 set_nlink(inode_bl, 1); 146 i_uid_write(inode_bl, 0); 147 i_gid_write(inode_bl, 0); 148 inode_bl->i_flags = 0; 149 ei_bl->i_flags = 0; 150 inode_bl->i_version = 1; 151 i_size_write(inode_bl, 0); 152 inode_bl->i_mode = S_IFREG; 153 if (EXT4_HAS_INCOMPAT_FEATURE(sb, 154 EXT4_FEATURE_INCOMPAT_EXTENTS)) { 155 ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); 156 ext4_ext_tree_init(handle, inode_bl); 157 } else 158 memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); 159 } 160 161 swap_inode_data(inode, inode_bl); 162 163 inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode); 164 165 spin_lock(&sbi->s_next_gen_lock); 166 inode->i_generation = sbi->s_next_generation++; 167 inode_bl->i_generation = sbi->s_next_generation++; 168 spin_unlock(&sbi->s_next_gen_lock); 169 170 ext4_discard_preallocations(inode); 171 172 err = ext4_mark_inode_dirty(handle, inode); 173 if (err < 0) { 174 ext4_warning(inode->i_sb, 175 "couldn't mark inode #%lu dirty (err %d)", 176 inode->i_ino, err); 177 /* Revert all changes: */ 178 swap_inode_data(inode, inode_bl); 179 } else { 180 err = ext4_mark_inode_dirty(handle, inode_bl); 181 if (err < 0) { 182 ext4_warning(inode_bl->i_sb, 183 "couldn't mark inode #%lu dirty (err %d)", 184 inode_bl->i_ino, err); 185 /* Revert all changes: */ 186 swap_inode_data(inode, inode_bl); 187 ext4_mark_inode_dirty(handle, inode); 188 } 189 } 190 ext4_journal_stop(handle); 191 ext4_double_up_write_data_sem(inode, inode_bl); 192 193 journal_err_out: 194 ext4_inode_resume_unlocked_dio(inode); 195 ext4_inode_resume_unlocked_dio(inode_bl); 196 unlock_two_nondirectories(inode, inode_bl); 197 iput(inode_bl); 198 return err; 199 } 200 201 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 202 { 203 struct inode *inode = file_inode(filp); 204 struct super_block *sb = inode->i_sb; 205 struct ext4_inode_info *ei = EXT4_I(inode); 206 unsigned int flags; 207 208 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); 209 210 switch (cmd) { 211 case EXT4_IOC_GETFLAGS: 212 ext4_get_inode_flags(ei); 213 flags = ei->i_flags & EXT4_FL_USER_VISIBLE; 214 return put_user(flags, (int __user *) arg); 215 case EXT4_IOC_SETFLAGS: { 216 handle_t *handle = NULL; 217 int err, migrate = 0; 218 struct ext4_iloc iloc; 219 unsigned int oldflags, mask, i; 220 unsigned int jflag; 221 222 if (!inode_owner_or_capable(inode)) 223 return -EACCES; 224 225 if (get_user(flags, (int __user *) arg)) 226 return -EFAULT; 227 228 err = mnt_want_write_file(filp); 229 if (err) 230 return err; 231 232 flags = ext4_mask_flags(inode->i_mode, flags); 233 234 err = -EPERM; 235 mutex_lock(&inode->i_mutex); 236 /* Is it quota file? Do not allow user to mess with it */ 237 if (IS_NOQUOTA(inode)) 238 goto flags_out; 239 240 oldflags = ei->i_flags; 241 242 /* The JOURNAL_DATA flag is modifiable only by root */ 243 jflag = flags & EXT4_JOURNAL_DATA_FL; 244 245 /* 246 * The IMMUTABLE and APPEND_ONLY flags can only be changed by 247 * the relevant capability. 248 * 249 * This test looks nicer. Thanks to Pauline Middelink 250 */ 251 if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { 252 if (!capable(CAP_LINUX_IMMUTABLE)) 253 goto flags_out; 254 } 255 256 /* 257 * The JOURNAL_DATA flag can only be changed by 258 * the relevant capability. 259 */ 260 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 261 if (!capable(CAP_SYS_RESOURCE)) 262 goto flags_out; 263 } 264 if ((flags ^ oldflags) & EXT4_EXTENTS_FL) 265 migrate = 1; 266 267 if (flags & EXT4_EOFBLOCKS_FL) { 268 /* we don't support adding EOFBLOCKS flag */ 269 if (!(oldflags & EXT4_EOFBLOCKS_FL)) { 270 err = -EOPNOTSUPP; 271 goto flags_out; 272 } 273 } else if (oldflags & EXT4_EOFBLOCKS_FL) 274 ext4_truncate(inode); 275 276 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 277 if (IS_ERR(handle)) { 278 err = PTR_ERR(handle); 279 goto flags_out; 280 } 281 if (IS_SYNC(inode)) 282 ext4_handle_sync(handle); 283 err = ext4_reserve_inode_write(handle, inode, &iloc); 284 if (err) 285 goto flags_err; 286 287 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { 288 if (!(mask & EXT4_FL_USER_MODIFIABLE)) 289 continue; 290 if (mask & flags) 291 ext4_set_inode_flag(inode, i); 292 else 293 ext4_clear_inode_flag(inode, i); 294 } 295 296 ext4_set_inode_flags(inode); 297 inode->i_ctime = ext4_current_time(inode); 298 299 err = ext4_mark_iloc_dirty(handle, inode, &iloc); 300 flags_err: 301 ext4_journal_stop(handle); 302 if (err) 303 goto flags_out; 304 305 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) 306 err = ext4_change_inode_journal_flag(inode, jflag); 307 if (err) 308 goto flags_out; 309 if (migrate) { 310 if (flags & EXT4_EXTENTS_FL) 311 err = ext4_ext_migrate(inode); 312 else 313 err = ext4_ind_migrate(inode); 314 } 315 316 flags_out: 317 mutex_unlock(&inode->i_mutex); 318 mnt_drop_write_file(filp); 319 return err; 320 } 321 case EXT4_IOC_GETVERSION: 322 case EXT4_IOC_GETVERSION_OLD: 323 return put_user(inode->i_generation, (int __user *) arg); 324 case EXT4_IOC_SETVERSION: 325 case EXT4_IOC_SETVERSION_OLD: { 326 handle_t *handle; 327 struct ext4_iloc iloc; 328 __u32 generation; 329 int err; 330 331 if (!inode_owner_or_capable(inode)) 332 return -EPERM; 333 334 if (ext4_has_metadata_csum(inode->i_sb)) { 335 ext4_warning(sb, "Setting inode version is not " 336 "supported with metadata_csum enabled."); 337 return -ENOTTY; 338 } 339 340 err = mnt_want_write_file(filp); 341 if (err) 342 return err; 343 if (get_user(generation, (int __user *) arg)) { 344 err = -EFAULT; 345 goto setversion_out; 346 } 347 348 mutex_lock(&inode->i_mutex); 349 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 350 if (IS_ERR(handle)) { 351 err = PTR_ERR(handle); 352 goto unlock_out; 353 } 354 err = ext4_reserve_inode_write(handle, inode, &iloc); 355 if (err == 0) { 356 inode->i_ctime = ext4_current_time(inode); 357 inode->i_generation = generation; 358 err = ext4_mark_iloc_dirty(handle, inode, &iloc); 359 } 360 ext4_journal_stop(handle); 361 362 unlock_out: 363 mutex_unlock(&inode->i_mutex); 364 setversion_out: 365 mnt_drop_write_file(filp); 366 return err; 367 } 368 case EXT4_IOC_GROUP_EXTEND: { 369 ext4_fsblk_t n_blocks_count; 370 int err, err2=0; 371 372 err = ext4_resize_begin(sb); 373 if (err) 374 return err; 375 376 if (get_user(n_blocks_count, (__u32 __user *)arg)) { 377 err = -EFAULT; 378 goto group_extend_out; 379 } 380 381 if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 382 EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 383 ext4_msg(sb, KERN_ERR, 384 "Online resizing not supported with bigalloc"); 385 err = -EOPNOTSUPP; 386 goto group_extend_out; 387 } 388 389 err = mnt_want_write_file(filp); 390 if (err) 391 goto group_extend_out; 392 393 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); 394 if (EXT4_SB(sb)->s_journal) { 395 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 396 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 397 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 398 } 399 if (err == 0) 400 err = err2; 401 mnt_drop_write_file(filp); 402 group_extend_out: 403 ext4_resize_end(sb); 404 return err; 405 } 406 407 case EXT4_IOC_MOVE_EXT: { 408 struct move_extent me; 409 struct fd donor; 410 int err; 411 412 if (!(filp->f_mode & FMODE_READ) || 413 !(filp->f_mode & FMODE_WRITE)) 414 return -EBADF; 415 416 if (copy_from_user(&me, 417 (struct move_extent __user *)arg, sizeof(me))) 418 return -EFAULT; 419 me.moved_len = 0; 420 421 donor = fdget(me.donor_fd); 422 if (!donor.file) 423 return -EBADF; 424 425 if (!(donor.file->f_mode & FMODE_WRITE)) { 426 err = -EBADF; 427 goto mext_out; 428 } 429 430 if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 431 EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 432 ext4_msg(sb, KERN_ERR, 433 "Online defrag not supported with bigalloc"); 434 err = -EOPNOTSUPP; 435 goto mext_out; 436 } 437 438 err = mnt_want_write_file(filp); 439 if (err) 440 goto mext_out; 441 442 err = ext4_move_extents(filp, donor.file, me.orig_start, 443 me.donor_start, me.len, &me.moved_len); 444 mnt_drop_write_file(filp); 445 446 if (copy_to_user((struct move_extent __user *)arg, 447 &me, sizeof(me))) 448 err = -EFAULT; 449 mext_out: 450 fdput(donor); 451 return err; 452 } 453 454 case EXT4_IOC_GROUP_ADD: { 455 struct ext4_new_group_data input; 456 int err, err2=0; 457 458 err = ext4_resize_begin(sb); 459 if (err) 460 return err; 461 462 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, 463 sizeof(input))) { 464 err = -EFAULT; 465 goto group_add_out; 466 } 467 468 if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 469 EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 470 ext4_msg(sb, KERN_ERR, 471 "Online resizing not supported with bigalloc"); 472 err = -EOPNOTSUPP; 473 goto group_add_out; 474 } 475 476 err = mnt_want_write_file(filp); 477 if (err) 478 goto group_add_out; 479 480 err = ext4_group_add(sb, &input); 481 if (EXT4_SB(sb)->s_journal) { 482 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 483 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 484 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 485 } 486 if (err == 0) 487 err = err2; 488 mnt_drop_write_file(filp); 489 if (!err && ext4_has_group_desc_csum(sb) && 490 test_opt(sb, INIT_INODE_TABLE)) 491 err = ext4_register_li_request(sb, input.group); 492 group_add_out: 493 ext4_resize_end(sb); 494 return err; 495 } 496 497 case EXT4_IOC_MIGRATE: 498 { 499 int err; 500 if (!inode_owner_or_capable(inode)) 501 return -EACCES; 502 503 err = mnt_want_write_file(filp); 504 if (err) 505 return err; 506 /* 507 * inode_mutex prevent write and truncate on the file. 508 * Read still goes through. We take i_data_sem in 509 * ext4_ext_swap_inode_data before we switch the 510 * inode format to prevent read. 511 */ 512 mutex_lock(&(inode->i_mutex)); 513 err = ext4_ext_migrate(inode); 514 mutex_unlock(&(inode->i_mutex)); 515 mnt_drop_write_file(filp); 516 return err; 517 } 518 519 case EXT4_IOC_ALLOC_DA_BLKS: 520 { 521 int err; 522 if (!inode_owner_or_capable(inode)) 523 return -EACCES; 524 525 err = mnt_want_write_file(filp); 526 if (err) 527 return err; 528 err = ext4_alloc_da_blocks(inode); 529 mnt_drop_write_file(filp); 530 return err; 531 } 532 533 case EXT4_IOC_SWAP_BOOT: 534 { 535 int err; 536 if (!(filp->f_mode & FMODE_WRITE)) 537 return -EBADF; 538 err = mnt_want_write_file(filp); 539 if (err) 540 return err; 541 err = swap_inode_boot_loader(sb, inode); 542 mnt_drop_write_file(filp); 543 return err; 544 } 545 546 case EXT4_IOC_RESIZE_FS: { 547 ext4_fsblk_t n_blocks_count; 548 int err = 0, err2 = 0; 549 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; 550 551 if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 552 EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 553 ext4_msg(sb, KERN_ERR, 554 "Online resizing not (yet) supported with bigalloc"); 555 return -EOPNOTSUPP; 556 } 557 558 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, 559 sizeof(__u64))) { 560 return -EFAULT; 561 } 562 563 err = ext4_resize_begin(sb); 564 if (err) 565 return err; 566 567 err = mnt_want_write_file(filp); 568 if (err) 569 goto resizefs_out; 570 571 err = ext4_resize_fs(sb, n_blocks_count); 572 if (EXT4_SB(sb)->s_journal) { 573 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 574 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 575 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 576 } 577 if (err == 0) 578 err = err2; 579 mnt_drop_write_file(filp); 580 if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && 581 ext4_has_group_desc_csum(sb) && 582 test_opt(sb, INIT_INODE_TABLE)) 583 err = ext4_register_li_request(sb, o_group); 584 585 resizefs_out: 586 ext4_resize_end(sb); 587 return err; 588 } 589 590 case FITRIM: 591 { 592 struct request_queue *q = bdev_get_queue(sb->s_bdev); 593 struct fstrim_range range; 594 int ret = 0; 595 596 if (!capable(CAP_SYS_ADMIN)) 597 return -EPERM; 598 599 if (!blk_queue_discard(q)) 600 return -EOPNOTSUPP; 601 602 if (copy_from_user(&range, (struct fstrim_range __user *)arg, 603 sizeof(range))) 604 return -EFAULT; 605 606 range.minlen = max((unsigned int)range.minlen, 607 q->limits.discard_granularity); 608 ret = ext4_trim_fs(sb, &range); 609 if (ret < 0) 610 return ret; 611 612 if (copy_to_user((struct fstrim_range __user *)arg, &range, 613 sizeof(range))) 614 return -EFAULT; 615 616 return 0; 617 } 618 case EXT4_IOC_PRECACHE_EXTENTS: 619 return ext4_ext_precache(inode); 620 621 default: 622 return -ENOTTY; 623 } 624 } 625 626 #ifdef CONFIG_COMPAT 627 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 628 { 629 /* These are just misnamed, they actually get/put from/to user an int */ 630 switch (cmd) { 631 case EXT4_IOC32_GETFLAGS: 632 cmd = EXT4_IOC_GETFLAGS; 633 break; 634 case EXT4_IOC32_SETFLAGS: 635 cmd = EXT4_IOC_SETFLAGS; 636 break; 637 case EXT4_IOC32_GETVERSION: 638 cmd = EXT4_IOC_GETVERSION; 639 break; 640 case EXT4_IOC32_SETVERSION: 641 cmd = EXT4_IOC_SETVERSION; 642 break; 643 case EXT4_IOC32_GROUP_EXTEND: 644 cmd = EXT4_IOC_GROUP_EXTEND; 645 break; 646 case EXT4_IOC32_GETVERSION_OLD: 647 cmd = EXT4_IOC_GETVERSION_OLD; 648 break; 649 case EXT4_IOC32_SETVERSION_OLD: 650 cmd = EXT4_IOC_SETVERSION_OLD; 651 break; 652 case EXT4_IOC32_GETRSVSZ: 653 cmd = EXT4_IOC_GETRSVSZ; 654 break; 655 case EXT4_IOC32_SETRSVSZ: 656 cmd = EXT4_IOC_SETRSVSZ; 657 break; 658 case EXT4_IOC32_GROUP_ADD: { 659 struct compat_ext4_new_group_input __user *uinput; 660 struct ext4_new_group_input input; 661 mm_segment_t old_fs; 662 int err; 663 664 uinput = compat_ptr(arg); 665 err = get_user(input.group, &uinput->group); 666 err |= get_user(input.block_bitmap, &uinput->block_bitmap); 667 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); 668 err |= get_user(input.inode_table, &uinput->inode_table); 669 err |= get_user(input.blocks_count, &uinput->blocks_count); 670 err |= get_user(input.reserved_blocks, 671 &uinput->reserved_blocks); 672 if (err) 673 return -EFAULT; 674 old_fs = get_fs(); 675 set_fs(KERNEL_DS); 676 err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, 677 (unsigned long) &input); 678 set_fs(old_fs); 679 return err; 680 } 681 case EXT4_IOC_MOVE_EXT: 682 case FITRIM: 683 case EXT4_IOC_RESIZE_FS: 684 case EXT4_IOC_PRECACHE_EXTENTS: 685 break; 686 default: 687 return -ENOIOCTLCMD; 688 } 689 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); 690 } 691 #endif 692