1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/fs/ext4/ioctl.c 4 * 5 * Copyright (C) 1993, 1994, 1995 6 * Remy Card (card@masi.ibp.fr) 7 * Laboratoire MASI - Institut Blaise Pascal 8 * Universite Pierre et Marie Curie (Paris VI) 9 */ 10 11 #include <linux/fs.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 <linux/quotaops.h> 18 #include <linux/random.h> 19 #include <linux/uaccess.h> 20 #include <linux/delay.h> 21 #include <linux/iversion.h> 22 #include <linux/fileattr.h> 23 #include <linux/uuid.h> 24 #include "ext4_jbd2.h" 25 #include "ext4.h" 26 #include <linux/fsmap.h> 27 #include "fsmap.h" 28 #include <trace/events/ext4.h> 29 30 typedef void ext4_update_sb_callback(struct ext4_sb_info *sbi, 31 struct ext4_super_block *es, 32 const void *arg); 33 34 /* 35 * Superblock modification callback function for changing file system 36 * label 37 */ 38 static void ext4_sb_setlabel(struct ext4_sb_info *sbi, 39 struct ext4_super_block *es, const void *arg) 40 { 41 /* Sanity check, this should never happen */ 42 BUILD_BUG_ON(sizeof(es->s_volume_name) < EXT4_LABEL_MAX); 43 44 memcpy(es->s_volume_name, (char *)arg, EXT4_LABEL_MAX); 45 } 46 47 /* 48 * Superblock modification callback function for changing file system 49 * UUID. 50 */ 51 static void ext4_sb_setuuid(struct ext4_sb_info *sbi, 52 struct ext4_super_block *es, const void *arg) 53 { 54 memcpy(es->s_uuid, (__u8 *)arg, UUID_SIZE); 55 } 56 57 static 58 int ext4_update_primary_sb(struct super_block *sb, handle_t *handle, 59 ext4_update_sb_callback func, 60 const void *arg) 61 { 62 int err = 0; 63 struct ext4_sb_info *sbi = EXT4_SB(sb); 64 struct buffer_head *bh = sbi->s_sbh; 65 struct ext4_super_block *es = sbi->s_es; 66 67 trace_ext4_update_sb(sb, bh->b_blocknr, 1); 68 69 BUFFER_TRACE(bh, "get_write_access"); 70 err = ext4_journal_get_write_access(handle, sb, 71 bh, 72 EXT4_JTR_NONE); 73 if (err) 74 goto out_err; 75 76 lock_buffer(bh); 77 func(sbi, es, arg); 78 ext4_superblock_csum_set(sb); 79 unlock_buffer(bh); 80 81 if (buffer_write_io_error(bh) || !buffer_uptodate(bh)) { 82 ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 83 "superblock detected"); 84 clear_buffer_write_io_error(bh); 85 set_buffer_uptodate(bh); 86 } 87 88 err = ext4_handle_dirty_metadata(handle, NULL, bh); 89 if (err) 90 goto out_err; 91 err = sync_dirty_buffer(bh); 92 out_err: 93 ext4_std_error(sb, err); 94 return err; 95 } 96 97 /* 98 * Update one backup superblock in the group 'grp' using the callback 99 * function 'func' and argument 'arg'. If the handle is NULL the 100 * modification is not journalled. 101 * 102 * Returns: 0 when no modification was done (no superblock in the group) 103 * 1 when the modification was successful 104 * <0 on error 105 */ 106 static int ext4_update_backup_sb(struct super_block *sb, 107 handle_t *handle, ext4_group_t grp, 108 ext4_update_sb_callback func, const void *arg) 109 { 110 int err = 0; 111 ext4_fsblk_t sb_block; 112 struct buffer_head *bh; 113 unsigned long offset = 0; 114 struct ext4_super_block *es; 115 116 if (!ext4_bg_has_super(sb, grp)) 117 return 0; 118 119 /* 120 * For the group 0 there is always 1k padding, so we have 121 * either adjust offset, or sb_block depending on blocksize 122 */ 123 if (grp == 0) { 124 sb_block = 1 * EXT4_MIN_BLOCK_SIZE; 125 offset = do_div(sb_block, sb->s_blocksize); 126 } else { 127 sb_block = ext4_group_first_block_no(sb, grp); 128 offset = 0; 129 } 130 131 trace_ext4_update_sb(sb, sb_block, handle ? 1 : 0); 132 133 bh = ext4_sb_bread(sb, sb_block, 0); 134 if (IS_ERR(bh)) 135 return PTR_ERR(bh); 136 137 if (handle) { 138 BUFFER_TRACE(bh, "get_write_access"); 139 err = ext4_journal_get_write_access(handle, sb, 140 bh, 141 EXT4_JTR_NONE); 142 if (err) 143 goto out_bh; 144 } 145 146 es = (struct ext4_super_block *) (bh->b_data + offset); 147 lock_buffer(bh); 148 if (ext4_has_feature_metadata_csum(sb) && 149 es->s_checksum != ext4_superblock_csum(es)) { 150 ext4_msg(sb, KERN_ERR, "Invalid checksum for backup " 151 "superblock %llu", sb_block); 152 unlock_buffer(bh); 153 goto out_bh; 154 } 155 func(EXT4_SB(sb), es, arg); 156 if (ext4_has_feature_metadata_csum(sb)) 157 es->s_checksum = ext4_superblock_csum(es); 158 set_buffer_uptodate(bh); 159 unlock_buffer(bh); 160 161 if (handle) { 162 err = ext4_handle_dirty_metadata(handle, NULL, bh); 163 if (err) 164 goto out_bh; 165 } else { 166 BUFFER_TRACE(bh, "marking dirty"); 167 mark_buffer_dirty(bh); 168 } 169 err = sync_dirty_buffer(bh); 170 171 out_bh: 172 brelse(bh); 173 ext4_std_error(sb, err); 174 return (err) ? err : 1; 175 } 176 177 /* 178 * Update primary and backup superblocks using the provided function 179 * func and argument arg. 180 * 181 * Only the primary superblock and at most two backup superblock 182 * modifications are journalled; the rest is modified without journal. 183 * This is safe because e2fsck will re-write them if there is a problem, 184 * and we're very unlikely to ever need more than two backups. 185 */ 186 static 187 int ext4_update_superblocks_fn(struct super_block *sb, 188 ext4_update_sb_callback func, 189 const void *arg) 190 { 191 handle_t *handle; 192 ext4_group_t ngroups; 193 unsigned int three = 1; 194 unsigned int five = 5; 195 unsigned int seven = 7; 196 int err = 0, ret, i; 197 ext4_group_t grp, primary_grp; 198 struct ext4_sb_info *sbi = EXT4_SB(sb); 199 200 /* 201 * We can't update superblocks while the online resize is running 202 */ 203 if (test_and_set_bit_lock(EXT4_FLAGS_RESIZING, 204 &sbi->s_ext4_flags)) { 205 ext4_msg(sb, KERN_ERR, "Can't modify superblock while" 206 "performing online resize"); 207 return -EBUSY; 208 } 209 210 /* 211 * We're only going to update primary superblock and two 212 * backup superblocks in this transaction. 213 */ 214 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 3); 215 if (IS_ERR(handle)) { 216 err = PTR_ERR(handle); 217 goto out; 218 } 219 220 /* Update primary superblock */ 221 err = ext4_update_primary_sb(sb, handle, func, arg); 222 if (err) { 223 ext4_msg(sb, KERN_ERR, "Failed to update primary " 224 "superblock"); 225 goto out_journal; 226 } 227 228 primary_grp = ext4_get_group_number(sb, sbi->s_sbh->b_blocknr); 229 ngroups = ext4_get_groups_count(sb); 230 231 /* 232 * Update backup superblocks. We have to start from group 0 233 * because it might not be where the primary superblock is 234 * if the fs is mounted with -o sb=<backup_sb_block> 235 */ 236 i = 0; 237 grp = 0; 238 while (grp < ngroups) { 239 /* Skip primary superblock */ 240 if (grp == primary_grp) 241 goto next_grp; 242 243 ret = ext4_update_backup_sb(sb, handle, grp, func, arg); 244 if (ret < 0) { 245 /* Ignore bad checksum; try to update next sb */ 246 if (ret == -EFSBADCRC) 247 goto next_grp; 248 err = ret; 249 goto out_journal; 250 } 251 252 i += ret; 253 if (handle && i > 1) { 254 /* 255 * We're only journalling primary superblock and 256 * two backup superblocks; the rest is not 257 * journalled. 258 */ 259 err = ext4_journal_stop(handle); 260 if (err) 261 goto out; 262 handle = NULL; 263 } 264 next_grp: 265 grp = ext4_list_backups(sb, &three, &five, &seven); 266 } 267 268 out_journal: 269 if (handle) { 270 ret = ext4_journal_stop(handle); 271 if (ret && !err) 272 err = ret; 273 } 274 out: 275 clear_bit_unlock(EXT4_FLAGS_RESIZING, &sbi->s_ext4_flags); 276 smp_mb__after_atomic(); 277 return err ? err : 0; 278 } 279 280 /* 281 * Swap memory between @a and @b for @len bytes. 282 * 283 * @a: pointer to first memory area 284 * @b: pointer to second memory area 285 * @len: number of bytes to swap 286 * 287 */ 288 static void memswap(void *a, void *b, size_t len) 289 { 290 unsigned char *ap, *bp; 291 292 ap = (unsigned char *)a; 293 bp = (unsigned char *)b; 294 while (len-- > 0) { 295 swap(*ap, *bp); 296 ap++; 297 bp++; 298 } 299 } 300 301 /* 302 * Swap i_data and associated attributes between @inode1 and @inode2. 303 * This function is used for the primary swap between inode1 and inode2 304 * and also to revert this primary swap in case of errors. 305 * 306 * Therefore you have to make sure, that calling this method twice 307 * will revert all changes. 308 * 309 * @inode1: pointer to first inode 310 * @inode2: pointer to second inode 311 */ 312 static void swap_inode_data(struct inode *inode1, struct inode *inode2) 313 { 314 loff_t isize; 315 struct ext4_inode_info *ei1; 316 struct ext4_inode_info *ei2; 317 unsigned long tmp; 318 struct timespec64 ts1, ts2; 319 320 ei1 = EXT4_I(inode1); 321 ei2 = EXT4_I(inode2); 322 323 swap(inode1->i_version, inode2->i_version); 324 325 ts1 = inode_get_atime(inode1); 326 ts2 = inode_get_atime(inode2); 327 inode_set_atime_to_ts(inode1, ts2); 328 inode_set_atime_to_ts(inode2, ts1); 329 330 ts1 = inode_get_mtime(inode1); 331 ts2 = inode_get_mtime(inode2); 332 inode_set_mtime_to_ts(inode1, ts2); 333 inode_set_mtime_to_ts(inode2, ts1); 334 335 memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); 336 tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP; 337 ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) | 338 (ei1->i_flags & ~EXT4_FL_SHOULD_SWAP); 339 ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP); 340 swap(ei1->i_disksize, ei2->i_disksize); 341 ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); 342 ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); 343 344 isize = i_size_read(inode1); 345 i_size_write(inode1, i_size_read(inode2)); 346 i_size_write(inode2, isize); 347 } 348 349 void ext4_reset_inode_seed(struct inode *inode) 350 { 351 struct ext4_inode_info *ei = EXT4_I(inode); 352 struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); 353 __le32 inum = cpu_to_le32(inode->i_ino); 354 __le32 gen = cpu_to_le32(inode->i_generation); 355 __u32 csum; 356 357 if (!ext4_has_feature_metadata_csum(inode->i_sb)) 358 return; 359 360 csum = ext4_chksum(sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum)); 361 ei->i_csum_seed = ext4_chksum(csum, (__u8 *)&gen, sizeof(gen)); 362 } 363 364 /* 365 * Swap the information from the given @inode and the inode 366 * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other 367 * important fields of the inodes. 368 * 369 * @sb: the super block of the filesystem 370 * @idmap: idmap of the mount the inode was found from 371 * @inode: the inode to swap with EXT4_BOOT_LOADER_INO 372 * 373 */ 374 static long swap_inode_boot_loader(struct super_block *sb, 375 struct mnt_idmap *idmap, 376 struct inode *inode) 377 { 378 handle_t *handle; 379 int err; 380 struct inode *inode_bl; 381 struct ext4_inode_info *ei_bl; 382 qsize_t size, size_bl, diff; 383 blkcnt_t blocks; 384 unsigned short bytes; 385 386 inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO, 387 EXT4_IGET_SPECIAL | EXT4_IGET_BAD); 388 if (IS_ERR(inode_bl)) 389 return PTR_ERR(inode_bl); 390 ei_bl = EXT4_I(inode_bl); 391 392 /* Protect orig inodes against a truncate and make sure, 393 * that only 1 swap_inode_boot_loader is running. */ 394 lock_two_nondirectories(inode, inode_bl); 395 396 if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) || 397 IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) || 398 (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) || 399 ext4_has_inline_data(inode)) { 400 err = -EINVAL; 401 goto journal_err_out; 402 } 403 404 if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) || 405 !inode_owner_or_capable(idmap, inode) || 406 !capable(CAP_SYS_ADMIN)) { 407 err = -EPERM; 408 goto journal_err_out; 409 } 410 411 filemap_invalidate_lock(inode->i_mapping); 412 err = filemap_write_and_wait(inode->i_mapping); 413 if (err) 414 goto err_out; 415 416 err = filemap_write_and_wait(inode_bl->i_mapping); 417 if (err) 418 goto err_out; 419 420 /* Wait for all existing dio workers */ 421 inode_dio_wait(inode); 422 inode_dio_wait(inode_bl); 423 424 truncate_inode_pages(&inode->i_data, 0); 425 truncate_inode_pages(&inode_bl->i_data, 0); 426 427 handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); 428 if (IS_ERR(handle)) { 429 err = -EINVAL; 430 goto err_out; 431 } 432 ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT, handle); 433 434 /* Protect extent tree against block allocations via delalloc */ 435 ext4_double_down_write_data_sem(inode, inode_bl); 436 437 if (is_bad_inode(inode_bl) || !S_ISREG(inode_bl->i_mode)) { 438 /* this inode has never been used as a BOOT_LOADER */ 439 set_nlink(inode_bl, 1); 440 i_uid_write(inode_bl, 0); 441 i_gid_write(inode_bl, 0); 442 inode_bl->i_flags = 0; 443 ei_bl->i_flags = 0; 444 inode_set_iversion(inode_bl, 1); 445 i_size_write(inode_bl, 0); 446 EXT4_I(inode_bl)->i_disksize = inode_bl->i_size; 447 inode_bl->i_mode = S_IFREG; 448 if (ext4_has_feature_extents(sb)) { 449 ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); 450 ext4_ext_tree_init(handle, inode_bl); 451 } else 452 memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); 453 } 454 455 err = dquot_initialize(inode); 456 if (err) 457 goto err_out1; 458 459 size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes; 460 size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes; 461 diff = size - size_bl; 462 swap_inode_data(inode, inode_bl); 463 464 inode_set_ctime_current(inode); 465 inode_set_ctime_current(inode_bl); 466 inode_inc_iversion(inode); 467 468 inode->i_generation = get_random_u32(); 469 inode_bl->i_generation = get_random_u32(); 470 ext4_reset_inode_seed(inode); 471 ext4_reset_inode_seed(inode_bl); 472 473 ext4_discard_preallocations(inode); 474 475 err = ext4_mark_inode_dirty(handle, inode); 476 if (err < 0) { 477 /* No need to update quota information. */ 478 ext4_warning(inode->i_sb, 479 "couldn't mark inode #%lu dirty (err %d)", 480 inode->i_ino, err); 481 /* Revert all changes: */ 482 swap_inode_data(inode, inode_bl); 483 ext4_mark_inode_dirty(handle, inode); 484 goto err_out1; 485 } 486 487 blocks = inode_bl->i_blocks; 488 bytes = inode_bl->i_bytes; 489 inode_bl->i_blocks = inode->i_blocks; 490 inode_bl->i_bytes = inode->i_bytes; 491 err = ext4_mark_inode_dirty(handle, inode_bl); 492 if (err < 0) { 493 /* No need to update quota information. */ 494 ext4_warning(inode_bl->i_sb, 495 "couldn't mark inode #%lu dirty (err %d)", 496 inode_bl->i_ino, err); 497 goto revert; 498 } 499 500 /* Bootloader inode should not be counted into quota information. */ 501 if (diff > 0) 502 dquot_free_space(inode, diff); 503 else 504 err = dquot_alloc_space(inode, -1 * diff); 505 506 if (err < 0) { 507 revert: 508 /* Revert all changes: */ 509 inode_bl->i_blocks = blocks; 510 inode_bl->i_bytes = bytes; 511 swap_inode_data(inode, inode_bl); 512 ext4_mark_inode_dirty(handle, inode); 513 ext4_mark_inode_dirty(handle, inode_bl); 514 } 515 516 err_out1: 517 ext4_journal_stop(handle); 518 ext4_double_up_write_data_sem(inode, inode_bl); 519 520 err_out: 521 filemap_invalidate_unlock(inode->i_mapping); 522 journal_err_out: 523 unlock_two_nondirectories(inode, inode_bl); 524 iput(inode_bl); 525 return err; 526 } 527 528 /* 529 * If immutable is set and we are not clearing it, we're not allowed to change 530 * anything else in the inode. Don't error out if we're only trying to set 531 * immutable on an immutable file. 532 */ 533 static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid, 534 unsigned int flags) 535 { 536 struct ext4_inode_info *ei = EXT4_I(inode); 537 unsigned int oldflags = ei->i_flags; 538 539 if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL)) 540 return 0; 541 542 if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL)) 543 return -EPERM; 544 if (ext4_has_feature_project(inode->i_sb) && 545 __kprojid_val(ei->i_projid) != new_projid) 546 return -EPERM; 547 548 return 0; 549 } 550 551 static void ext4_dax_dontcache(struct inode *inode, unsigned int flags) 552 { 553 struct ext4_inode_info *ei = EXT4_I(inode); 554 555 if (S_ISDIR(inode->i_mode)) 556 return; 557 558 if (test_opt2(inode->i_sb, DAX_NEVER) || 559 test_opt(inode->i_sb, DAX_ALWAYS)) 560 return; 561 562 if ((ei->i_flags ^ flags) & EXT4_DAX_FL) 563 d_mark_dontcache(inode); 564 } 565 566 static bool dax_compatible(struct inode *inode, unsigned int oldflags, 567 unsigned int flags) 568 { 569 /* Allow the DAX flag to be changed on inline directories */ 570 if (S_ISDIR(inode->i_mode)) { 571 flags &= ~EXT4_INLINE_DATA_FL; 572 oldflags &= ~EXT4_INLINE_DATA_FL; 573 } 574 575 if (flags & EXT4_DAX_FL) { 576 if ((oldflags & EXT4_DAX_MUT_EXCL) || 577 ext4_test_inode_state(inode, 578 EXT4_STATE_VERITY_IN_PROGRESS)) { 579 return false; 580 } 581 } 582 583 if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL)) 584 return false; 585 586 return true; 587 } 588 589 static int ext4_ioctl_setflags(struct inode *inode, 590 unsigned int flags) 591 { 592 struct ext4_inode_info *ei = EXT4_I(inode); 593 handle_t *handle = NULL; 594 int err = -EPERM, migrate = 0; 595 struct ext4_iloc iloc; 596 unsigned int oldflags, mask, i; 597 struct super_block *sb = inode->i_sb; 598 599 /* Is it quota file? Do not allow user to mess with it */ 600 if (ext4_is_quota_file(inode)) 601 goto flags_out; 602 603 oldflags = ei->i_flags; 604 /* 605 * The JOURNAL_DATA flag can only be changed by 606 * the relevant capability. 607 */ 608 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 609 if (!capable(CAP_SYS_RESOURCE)) 610 goto flags_out; 611 } 612 613 if (!dax_compatible(inode, oldflags, flags)) { 614 err = -EOPNOTSUPP; 615 goto flags_out; 616 } 617 618 if ((flags ^ oldflags) & EXT4_EXTENTS_FL) 619 migrate = 1; 620 621 if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) { 622 if (!ext4_has_feature_casefold(sb)) { 623 err = -EOPNOTSUPP; 624 goto flags_out; 625 } 626 627 if (!S_ISDIR(inode->i_mode)) { 628 err = -ENOTDIR; 629 goto flags_out; 630 } 631 632 if (!ext4_empty_dir(inode)) { 633 err = -ENOTEMPTY; 634 goto flags_out; 635 } 636 } 637 638 /* 639 * Wait for all pending directio and then flush all the dirty pages 640 * for this file. The flush marks all the pages readonly, so any 641 * subsequent attempt to write to the file (particularly mmap pages) 642 * will come through the filesystem and fail. 643 */ 644 if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) && 645 (flags & EXT4_IMMUTABLE_FL)) { 646 inode_dio_wait(inode); 647 err = filemap_write_and_wait(inode->i_mapping); 648 if (err) 649 goto flags_out; 650 } 651 652 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 653 if (IS_ERR(handle)) { 654 err = PTR_ERR(handle); 655 goto flags_out; 656 } 657 if (IS_SYNC(inode)) 658 ext4_handle_sync(handle); 659 err = ext4_reserve_inode_write(handle, inode, &iloc); 660 if (err) 661 goto flags_err; 662 663 ext4_dax_dontcache(inode, flags); 664 665 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { 666 if (!(mask & EXT4_FL_USER_MODIFIABLE)) 667 continue; 668 /* These flags get special treatment later */ 669 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL) 670 continue; 671 if (mask & flags) 672 ext4_set_inode_flag(inode, i); 673 else 674 ext4_clear_inode_flag(inode, i); 675 } 676 677 ext4_set_inode_flags(inode, false); 678 679 inode_set_ctime_current(inode); 680 inode_inc_iversion(inode); 681 682 err = ext4_mark_iloc_dirty(handle, inode, &iloc); 683 flags_err: 684 ext4_journal_stop(handle); 685 if (err) 686 goto flags_out; 687 688 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 689 /* 690 * Changes to the journaling mode can cause unsafe changes to 691 * S_DAX if the inode is DAX 692 */ 693 if (IS_DAX(inode)) { 694 err = -EBUSY; 695 goto flags_out; 696 } 697 698 err = ext4_change_inode_journal_flag(inode, 699 flags & EXT4_JOURNAL_DATA_FL); 700 if (err) 701 goto flags_out; 702 } 703 if (migrate) { 704 if (flags & EXT4_EXTENTS_FL) 705 err = ext4_ext_migrate(inode); 706 else 707 err = ext4_ind_migrate(inode); 708 } 709 710 flags_out: 711 return err; 712 } 713 714 #ifdef CONFIG_QUOTA 715 static int ext4_ioctl_setproject(struct inode *inode, __u32 projid) 716 { 717 struct super_block *sb = inode->i_sb; 718 struct ext4_inode_info *ei = EXT4_I(inode); 719 int err, rc; 720 handle_t *handle; 721 kprojid_t kprojid; 722 struct ext4_iloc iloc; 723 struct ext4_inode *raw_inode; 724 struct dquot *transfer_to[MAXQUOTAS] = { }; 725 726 if (!ext4_has_feature_project(sb)) { 727 if (projid != EXT4_DEF_PROJID) 728 return -EOPNOTSUPP; 729 else 730 return 0; 731 } 732 733 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) 734 return -EOPNOTSUPP; 735 736 kprojid = make_kprojid(&init_user_ns, (projid_t)projid); 737 738 if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) 739 return 0; 740 741 err = -EPERM; 742 /* Is it quota file? Do not allow user to mess with it */ 743 if (ext4_is_quota_file(inode)) 744 return err; 745 746 err = dquot_initialize(inode); 747 if (err) 748 return err; 749 750 err = ext4_get_inode_loc(inode, &iloc); 751 if (err) 752 return err; 753 754 raw_inode = ext4_raw_inode(&iloc); 755 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { 756 err = ext4_expand_extra_isize(inode, 757 EXT4_SB(sb)->s_want_extra_isize, 758 &iloc); 759 if (err) 760 return err; 761 } else { 762 brelse(iloc.bh); 763 } 764 765 handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 766 EXT4_QUOTA_INIT_BLOCKS(sb) + 767 EXT4_QUOTA_DEL_BLOCKS(sb) + 3); 768 if (IS_ERR(handle)) 769 return PTR_ERR(handle); 770 771 err = ext4_reserve_inode_write(handle, inode, &iloc); 772 if (err) 773 goto out_stop; 774 775 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); 776 if (!IS_ERR(transfer_to[PRJQUOTA])) { 777 778 /* __dquot_transfer() calls back ext4_get_inode_usage() which 779 * counts xattr inode references. 780 */ 781 down_read(&EXT4_I(inode)->xattr_sem); 782 err = __dquot_transfer(inode, transfer_to); 783 up_read(&EXT4_I(inode)->xattr_sem); 784 dqput(transfer_to[PRJQUOTA]); 785 if (err) 786 goto out_dirty; 787 } 788 789 EXT4_I(inode)->i_projid = kprojid; 790 inode_set_ctime_current(inode); 791 inode_inc_iversion(inode); 792 out_dirty: 793 rc = ext4_mark_iloc_dirty(handle, inode, &iloc); 794 if (!err) 795 err = rc; 796 out_stop: 797 ext4_journal_stop(handle); 798 return err; 799 } 800 #else 801 static int ext4_ioctl_setproject(struct inode *inode, __u32 projid) 802 { 803 if (projid != EXT4_DEF_PROJID) 804 return -EOPNOTSUPP; 805 return 0; 806 } 807 #endif 808 809 int ext4_force_shutdown(struct super_block *sb, u32 flags) 810 { 811 struct ext4_sb_info *sbi = EXT4_SB(sb); 812 int ret; 813 814 if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH) 815 return -EINVAL; 816 817 if (ext4_forced_shutdown(sb)) 818 return 0; 819 820 ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags); 821 trace_ext4_shutdown(sb, flags); 822 823 switch (flags) { 824 case EXT4_GOING_FLAGS_DEFAULT: 825 ret = bdev_freeze(sb->s_bdev); 826 if (ret) 827 return ret; 828 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 829 bdev_thaw(sb->s_bdev); 830 break; 831 case EXT4_GOING_FLAGS_LOGFLUSH: 832 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 833 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) { 834 (void) ext4_force_commit(sb); 835 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); 836 } 837 break; 838 case EXT4_GOING_FLAGS_NOLOGFLUSH: 839 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 840 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) 841 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); 842 break; 843 default: 844 return -EINVAL; 845 } 846 clear_opt(sb, DISCARD); 847 return 0; 848 } 849 850 static int ext4_ioctl_shutdown(struct super_block *sb, unsigned long arg) 851 { 852 u32 flags; 853 854 if (!capable(CAP_SYS_ADMIN)) 855 return -EPERM; 856 857 if (get_user(flags, (__u32 __user *)arg)) 858 return -EFAULT; 859 860 return ext4_force_shutdown(sb, flags); 861 } 862 863 struct getfsmap_info { 864 struct super_block *gi_sb; 865 struct fsmap_head __user *gi_data; 866 unsigned int gi_idx; 867 __u32 gi_last_flags; 868 }; 869 870 static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv) 871 { 872 struct getfsmap_info *info = priv; 873 struct fsmap fm; 874 875 trace_ext4_getfsmap_mapping(info->gi_sb, xfm); 876 877 info->gi_last_flags = xfm->fmr_flags; 878 ext4_fsmap_from_internal(info->gi_sb, &fm, xfm); 879 if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm, 880 sizeof(struct fsmap))) 881 return -EFAULT; 882 883 return 0; 884 } 885 886 static int ext4_ioc_getfsmap(struct super_block *sb, 887 struct fsmap_head __user *arg) 888 { 889 struct getfsmap_info info = { NULL }; 890 struct ext4_fsmap_head xhead = {0}; 891 struct fsmap_head head; 892 bool aborted = false; 893 int error; 894 895 if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 896 return -EFAULT; 897 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 898 memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 899 sizeof(head.fmh_keys[0].fmr_reserved)) || 900 memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 901 sizeof(head.fmh_keys[1].fmr_reserved))) 902 return -EINVAL; 903 /* 904 * ext4 doesn't report file extents at all, so the only valid 905 * file offsets are the magic ones (all zeroes or all ones). 906 */ 907 if (head.fmh_keys[0].fmr_offset || 908 (head.fmh_keys[1].fmr_offset != 0 && 909 head.fmh_keys[1].fmr_offset != -1ULL)) 910 return -EINVAL; 911 912 xhead.fmh_iflags = head.fmh_iflags; 913 xhead.fmh_count = head.fmh_count; 914 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]); 915 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]); 916 917 trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]); 918 trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]); 919 920 info.gi_sb = sb; 921 info.gi_data = arg; 922 error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info); 923 if (error == EXT4_QUERY_RANGE_ABORT) 924 aborted = true; 925 else if (error) 926 return error; 927 928 /* If we didn't abort, set the "last" flag in the last fmx */ 929 if (!aborted && info.gi_idx) { 930 info.gi_last_flags |= FMR_OF_LAST; 931 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags, 932 &info.gi_last_flags, 933 sizeof(info.gi_last_flags))) 934 return -EFAULT; 935 } 936 937 /* copy back header */ 938 head.fmh_entries = xhead.fmh_entries; 939 head.fmh_oflags = xhead.fmh_oflags; 940 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) 941 return -EFAULT; 942 943 return 0; 944 } 945 946 static long ext4_ioctl_group_add(struct file *file, 947 struct ext4_new_group_data *input) 948 { 949 struct super_block *sb = file_inode(file)->i_sb; 950 int err, err2=0; 951 952 err = ext4_resize_begin(sb); 953 if (err) 954 return err; 955 956 if (ext4_has_feature_bigalloc(sb)) { 957 ext4_msg(sb, KERN_ERR, 958 "Online resizing not supported with bigalloc"); 959 err = -EOPNOTSUPP; 960 goto group_add_out; 961 } 962 963 err = mnt_want_write_file(file); 964 if (err) 965 goto group_add_out; 966 967 err = ext4_group_add(sb, input); 968 if (EXT4_SB(sb)->s_journal) { 969 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 970 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 971 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 972 } 973 if (err == 0) 974 err = err2; 975 mnt_drop_write_file(file); 976 if (!err && ext4_has_group_desc_csum(sb) && 977 test_opt(sb, INIT_INODE_TABLE)) 978 err = ext4_register_li_request(sb, input->group); 979 group_add_out: 980 err2 = ext4_resize_end(sb, false); 981 if (err == 0) 982 err = err2; 983 return err; 984 } 985 986 int ext4_fileattr_get(struct dentry *dentry, struct file_kattr *fa) 987 { 988 struct inode *inode = d_inode(dentry); 989 struct ext4_inode_info *ei = EXT4_I(inode); 990 u32 flags = ei->i_flags & EXT4_FL_USER_VISIBLE; 991 992 if (S_ISREG(inode->i_mode)) 993 flags &= ~FS_PROJINHERIT_FL; 994 995 fileattr_fill_flags(fa, flags); 996 if (ext4_has_feature_project(inode->i_sb)) 997 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid); 998 999 return 0; 1000 } 1001 1002 int ext4_fileattr_set(struct mnt_idmap *idmap, 1003 struct dentry *dentry, struct file_kattr *fa) 1004 { 1005 struct inode *inode = d_inode(dentry); 1006 u32 flags = fa->flags; 1007 int err = -EOPNOTSUPP; 1008 1009 if (flags & ~EXT4_FL_USER_VISIBLE) 1010 goto out; 1011 1012 /* 1013 * chattr(1) grabs flags via GETFLAGS, modifies the result and 1014 * passes that to SETFLAGS. So we cannot easily make SETFLAGS 1015 * more restrictive than just silently masking off visible but 1016 * not settable flags as we always did. 1017 */ 1018 flags &= EXT4_FL_USER_MODIFIABLE; 1019 if (ext4_mask_flags(inode->i_mode, flags) != flags) 1020 goto out; 1021 err = ext4_ioctl_check_immutable(inode, fa->fsx_projid, flags); 1022 if (err) 1023 goto out; 1024 err = ext4_ioctl_setflags(inode, flags); 1025 if (err) 1026 goto out; 1027 err = ext4_ioctl_setproject(inode, fa->fsx_projid); 1028 out: 1029 return err; 1030 } 1031 1032 /* So that the fiemap access checks can't overflow on 32 bit machines. */ 1033 #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent)) 1034 1035 static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg) 1036 { 1037 struct fiemap fiemap; 1038 struct fiemap __user *ufiemap = (struct fiemap __user *) arg; 1039 struct fiemap_extent_info fieinfo = { 0, }; 1040 struct inode *inode = file_inode(filp); 1041 int error; 1042 1043 if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap))) 1044 return -EFAULT; 1045 1046 if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS) 1047 return -EINVAL; 1048 1049 fieinfo.fi_flags = fiemap.fm_flags; 1050 fieinfo.fi_extents_max = fiemap.fm_extent_count; 1051 fieinfo.fi_extents_start = ufiemap->fm_extents; 1052 1053 error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start, 1054 fiemap.fm_length); 1055 fiemap.fm_flags = fieinfo.fi_flags; 1056 fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped; 1057 if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap))) 1058 error = -EFAULT; 1059 1060 return error; 1061 } 1062 1063 static int ext4_ioctl_checkpoint(struct file *filp, unsigned long arg) 1064 { 1065 int err = 0; 1066 __u32 flags = 0; 1067 unsigned int flush_flags = 0; 1068 struct super_block *sb = file_inode(filp)->i_sb; 1069 1070 if (copy_from_user(&flags, (__u32 __user *)arg, 1071 sizeof(__u32))) 1072 return -EFAULT; 1073 1074 if (!capable(CAP_SYS_ADMIN)) 1075 return -EPERM; 1076 1077 /* check for invalid bits set */ 1078 if ((flags & ~EXT4_IOC_CHECKPOINT_FLAG_VALID) || 1079 ((flags & JBD2_JOURNAL_FLUSH_DISCARD) && 1080 (flags & JBD2_JOURNAL_FLUSH_ZEROOUT))) 1081 return -EINVAL; 1082 1083 if (!EXT4_SB(sb)->s_journal) 1084 return -ENODEV; 1085 1086 if ((flags & JBD2_JOURNAL_FLUSH_DISCARD) && 1087 !bdev_max_discard_sectors(EXT4_SB(sb)->s_journal->j_dev)) 1088 return -EOPNOTSUPP; 1089 1090 if (flags & EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN) 1091 return 0; 1092 1093 if (flags & EXT4_IOC_CHECKPOINT_FLAG_DISCARD) 1094 flush_flags |= JBD2_JOURNAL_FLUSH_DISCARD; 1095 1096 if (flags & EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT) { 1097 flush_flags |= JBD2_JOURNAL_FLUSH_ZEROOUT; 1098 pr_info_ratelimited("warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow"); 1099 } 1100 1101 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 1102 err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, flush_flags); 1103 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 1104 1105 return err; 1106 } 1107 1108 static int ext4_ioctl_setlabel(struct file *filp, const char __user *user_label) 1109 { 1110 size_t len; 1111 int ret = 0; 1112 char new_label[EXT4_LABEL_MAX + 1]; 1113 struct super_block *sb = file_inode(filp)->i_sb; 1114 1115 if (!capable(CAP_SYS_ADMIN)) 1116 return -EPERM; 1117 1118 /* 1119 * Copy the maximum length allowed for ext4 label with one more to 1120 * find the required terminating null byte in order to test the 1121 * label length. The on disk label doesn't need to be null terminated. 1122 */ 1123 if (copy_from_user(new_label, user_label, EXT4_LABEL_MAX + 1)) 1124 return -EFAULT; 1125 1126 len = strnlen(new_label, EXT4_LABEL_MAX + 1); 1127 if (len > EXT4_LABEL_MAX) 1128 return -EINVAL; 1129 1130 /* 1131 * Clear the buffer after the new label 1132 */ 1133 memset(new_label + len, 0, EXT4_LABEL_MAX - len); 1134 1135 ret = mnt_want_write_file(filp); 1136 if (ret) 1137 return ret; 1138 1139 ret = ext4_update_superblocks_fn(sb, ext4_sb_setlabel, new_label); 1140 1141 mnt_drop_write_file(filp); 1142 return ret; 1143 } 1144 1145 static int ext4_ioctl_getlabel(struct ext4_sb_info *sbi, char __user *user_label) 1146 { 1147 char label[EXT4_LABEL_MAX + 1]; 1148 1149 /* 1150 * EXT4_LABEL_MAX must always be smaller than FSLABEL_MAX because 1151 * FSLABEL_MAX must include terminating null byte, while s_volume_name 1152 * does not have to. 1153 */ 1154 BUILD_BUG_ON(EXT4_LABEL_MAX >= FSLABEL_MAX); 1155 1156 lock_buffer(sbi->s_sbh); 1157 memtostr_pad(label, sbi->s_es->s_volume_name); 1158 unlock_buffer(sbi->s_sbh); 1159 1160 if (copy_to_user(user_label, label, sizeof(label))) 1161 return -EFAULT; 1162 return 0; 1163 } 1164 1165 static int ext4_ioctl_getuuid(struct ext4_sb_info *sbi, 1166 struct fsuuid __user *ufsuuid) 1167 { 1168 struct fsuuid fsuuid; 1169 __u8 uuid[UUID_SIZE]; 1170 1171 if (copy_from_user(&fsuuid, ufsuuid, sizeof(fsuuid))) 1172 return -EFAULT; 1173 1174 if (fsuuid.fsu_len == 0) { 1175 fsuuid.fsu_len = UUID_SIZE; 1176 if (copy_to_user(&ufsuuid->fsu_len, &fsuuid.fsu_len, 1177 sizeof(fsuuid.fsu_len))) 1178 return -EFAULT; 1179 return 0; 1180 } 1181 1182 if (fsuuid.fsu_len < UUID_SIZE || fsuuid.fsu_flags != 0) 1183 return -EINVAL; 1184 1185 lock_buffer(sbi->s_sbh); 1186 memcpy(uuid, sbi->s_es->s_uuid, UUID_SIZE); 1187 unlock_buffer(sbi->s_sbh); 1188 1189 fsuuid.fsu_len = UUID_SIZE; 1190 if (copy_to_user(ufsuuid, &fsuuid, sizeof(fsuuid)) || 1191 copy_to_user(&ufsuuid->fsu_uuid[0], uuid, UUID_SIZE)) 1192 return -EFAULT; 1193 return 0; 1194 } 1195 1196 static int ext4_ioctl_setuuid(struct file *filp, 1197 const struct fsuuid __user *ufsuuid) 1198 { 1199 int ret = 0; 1200 struct super_block *sb = file_inode(filp)->i_sb; 1201 struct fsuuid fsuuid; 1202 __u8 uuid[UUID_SIZE]; 1203 1204 if (!capable(CAP_SYS_ADMIN)) 1205 return -EPERM; 1206 1207 /* 1208 * If any checksums (group descriptors or metadata) are being used 1209 * then the checksum seed feature is required to change the UUID. 1210 */ 1211 if (((ext4_has_feature_gdt_csum(sb) || 1212 ext4_has_feature_metadata_csum(sb)) 1213 && !ext4_has_feature_csum_seed(sb)) 1214 || ext4_has_feature_stable_inodes(sb)) 1215 return -EOPNOTSUPP; 1216 1217 if (copy_from_user(&fsuuid, ufsuuid, sizeof(fsuuid))) 1218 return -EFAULT; 1219 1220 if (fsuuid.fsu_len != UUID_SIZE || fsuuid.fsu_flags != 0) 1221 return -EINVAL; 1222 1223 if (copy_from_user(uuid, &ufsuuid->fsu_uuid[0], UUID_SIZE)) 1224 return -EFAULT; 1225 1226 ret = mnt_want_write_file(filp); 1227 if (ret) 1228 return ret; 1229 1230 ret = ext4_update_superblocks_fn(sb, ext4_sb_setuuid, &uuid); 1231 mnt_drop_write_file(filp); 1232 1233 return ret; 1234 } 1235 1236 1237 #define TUNE_OPS_SUPPORTED (EXT4_TUNE_FL_ERRORS_BEHAVIOR | \ 1238 EXT4_TUNE_FL_MNT_COUNT | EXT4_TUNE_FL_MAX_MNT_COUNT | \ 1239 EXT4_TUNE_FL_CHECKINTRVAL | EXT4_TUNE_FL_LAST_CHECK_TIME | \ 1240 EXT4_TUNE_FL_RESERVED_BLOCKS | EXT4_TUNE_FL_RESERVED_UID | \ 1241 EXT4_TUNE_FL_RESERVED_GID | EXT4_TUNE_FL_DEFAULT_MNT_OPTS | \ 1242 EXT4_TUNE_FL_DEF_HASH_ALG | EXT4_TUNE_FL_RAID_STRIDE | \ 1243 EXT4_TUNE_FL_RAID_STRIPE_WIDTH | EXT4_TUNE_FL_MOUNT_OPTS | \ 1244 EXT4_TUNE_FL_FEATURES | EXT4_TUNE_FL_EDIT_FEATURES | \ 1245 EXT4_TUNE_FL_FORCE_FSCK | EXT4_TUNE_FL_ENCODING | \ 1246 EXT4_TUNE_FL_ENCODING_FLAGS) 1247 1248 #define EXT4_TUNE_SET_COMPAT_SUPP \ 1249 (EXT4_FEATURE_COMPAT_DIR_INDEX | \ 1250 EXT4_FEATURE_COMPAT_STABLE_INODES) 1251 #define EXT4_TUNE_SET_INCOMPAT_SUPP \ 1252 (EXT4_FEATURE_INCOMPAT_EXTENTS | \ 1253 EXT4_FEATURE_INCOMPAT_EA_INODE | \ 1254 EXT4_FEATURE_INCOMPAT_ENCRYPT | \ 1255 EXT4_FEATURE_INCOMPAT_CSUM_SEED | \ 1256 EXT4_FEATURE_INCOMPAT_LARGEDIR | \ 1257 EXT4_FEATURE_INCOMPAT_CASEFOLD) 1258 #define EXT4_TUNE_SET_RO_COMPAT_SUPP \ 1259 (EXT4_FEATURE_RO_COMPAT_LARGE_FILE | \ 1260 EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ 1261 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \ 1262 EXT4_FEATURE_RO_COMPAT_PROJECT | \ 1263 EXT4_FEATURE_RO_COMPAT_VERITY) 1264 1265 #define EXT4_TUNE_CLEAR_COMPAT_SUPP (0) 1266 #define EXT4_TUNE_CLEAR_INCOMPAT_SUPP (0) 1267 #define EXT4_TUNE_CLEAR_RO_COMPAT_SUPP (0) 1268 1269 #define SB_ENC_SUPP_MASK (SB_ENC_STRICT_MODE_FL | \ 1270 SB_ENC_NO_COMPAT_FALLBACK_FL) 1271 1272 static int ext4_ioctl_get_tune_sb(struct ext4_sb_info *sbi, 1273 struct ext4_tune_sb_params __user *params) 1274 { 1275 struct ext4_tune_sb_params ret; 1276 struct ext4_super_block *es = sbi->s_es; 1277 1278 memset(&ret, 0, sizeof(ret)); 1279 ret.set_flags = TUNE_OPS_SUPPORTED; 1280 ret.errors_behavior = le16_to_cpu(es->s_errors); 1281 ret.mnt_count = le16_to_cpu(es->s_mnt_count); 1282 ret.max_mnt_count = le16_to_cpu(es->s_max_mnt_count); 1283 ret.checkinterval = le32_to_cpu(es->s_checkinterval); 1284 ret.last_check_time = le32_to_cpu(es->s_lastcheck); 1285 ret.reserved_blocks = ext4_r_blocks_count(es); 1286 ret.blocks_count = ext4_blocks_count(es); 1287 ret.reserved_uid = ext4_get_resuid(es); 1288 ret.reserved_gid = ext4_get_resgid(es); 1289 ret.default_mnt_opts = le32_to_cpu(es->s_default_mount_opts); 1290 ret.def_hash_alg = es->s_def_hash_version; 1291 ret.raid_stride = le16_to_cpu(es->s_raid_stride); 1292 ret.raid_stripe_width = le32_to_cpu(es->s_raid_stripe_width); 1293 ret.encoding = le16_to_cpu(es->s_encoding); 1294 ret.encoding_flags = le16_to_cpu(es->s_encoding_flags); 1295 strscpy_pad(ret.mount_opts, es->s_mount_opts); 1296 ret.feature_compat = le32_to_cpu(es->s_feature_compat); 1297 ret.feature_incompat = le32_to_cpu(es->s_feature_incompat); 1298 ret.feature_ro_compat = le32_to_cpu(es->s_feature_ro_compat); 1299 ret.set_feature_compat_mask = EXT4_TUNE_SET_COMPAT_SUPP; 1300 ret.set_feature_incompat_mask = EXT4_TUNE_SET_INCOMPAT_SUPP; 1301 ret.set_feature_ro_compat_mask = EXT4_TUNE_SET_RO_COMPAT_SUPP; 1302 ret.clear_feature_compat_mask = EXT4_TUNE_CLEAR_COMPAT_SUPP; 1303 ret.clear_feature_incompat_mask = EXT4_TUNE_CLEAR_INCOMPAT_SUPP; 1304 ret.clear_feature_ro_compat_mask = EXT4_TUNE_CLEAR_RO_COMPAT_SUPP; 1305 if (copy_to_user(params, &ret, sizeof(ret))) 1306 return -EFAULT; 1307 return 0; 1308 } 1309 1310 static void ext4_sb_setparams(struct ext4_sb_info *sbi, 1311 struct ext4_super_block *es, const void *arg) 1312 { 1313 const struct ext4_tune_sb_params *params = arg; 1314 1315 if (params->set_flags & EXT4_TUNE_FL_ERRORS_BEHAVIOR) 1316 es->s_errors = cpu_to_le16(params->errors_behavior); 1317 if (params->set_flags & EXT4_TUNE_FL_MNT_COUNT) 1318 es->s_mnt_count = cpu_to_le16(params->mnt_count); 1319 if (params->set_flags & EXT4_TUNE_FL_MAX_MNT_COUNT) 1320 es->s_max_mnt_count = cpu_to_le16(params->max_mnt_count); 1321 if (params->set_flags & EXT4_TUNE_FL_CHECKINTRVAL) 1322 es->s_checkinterval = cpu_to_le32(params->checkinterval); 1323 if (params->set_flags & EXT4_TUNE_FL_LAST_CHECK_TIME) 1324 es->s_lastcheck = cpu_to_le32(params->last_check_time); 1325 if (params->set_flags & EXT4_TUNE_FL_RESERVED_BLOCKS) { 1326 ext4_fsblk_t blk = params->reserved_blocks; 1327 1328 es->s_r_blocks_count_lo = cpu_to_le32((u32)blk); 1329 es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); 1330 } 1331 if (params->set_flags & EXT4_TUNE_FL_RESERVED_UID) { 1332 int uid = params->reserved_uid; 1333 1334 es->s_def_resuid = cpu_to_le16(uid & 0xFFFF); 1335 es->s_def_resuid_hi = cpu_to_le16(uid >> 16); 1336 } 1337 if (params->set_flags & EXT4_TUNE_FL_RESERVED_GID) { 1338 int gid = params->reserved_gid; 1339 1340 es->s_def_resgid = cpu_to_le16(gid & 0xFFFF); 1341 es->s_def_resgid_hi = cpu_to_le16(gid >> 16); 1342 } 1343 if (params->set_flags & EXT4_TUNE_FL_DEFAULT_MNT_OPTS) 1344 es->s_default_mount_opts = cpu_to_le32(params->default_mnt_opts); 1345 if (params->set_flags & EXT4_TUNE_FL_DEF_HASH_ALG) 1346 es->s_def_hash_version = params->def_hash_alg; 1347 if (params->set_flags & EXT4_TUNE_FL_RAID_STRIDE) 1348 es->s_raid_stride = cpu_to_le16(params->raid_stride); 1349 if (params->set_flags & EXT4_TUNE_FL_RAID_STRIPE_WIDTH) 1350 es->s_raid_stripe_width = 1351 cpu_to_le32(params->raid_stripe_width); 1352 if (params->set_flags & EXT4_TUNE_FL_ENCODING) 1353 es->s_encoding = cpu_to_le16(params->encoding); 1354 if (params->set_flags & EXT4_TUNE_FL_ENCODING_FLAGS) 1355 es->s_encoding_flags = cpu_to_le16(params->encoding_flags); 1356 strscpy_pad(es->s_mount_opts, params->mount_opts); 1357 if (params->set_flags & EXT4_TUNE_FL_EDIT_FEATURES) { 1358 es->s_feature_compat |= 1359 cpu_to_le32(params->set_feature_compat_mask); 1360 es->s_feature_incompat |= 1361 cpu_to_le32(params->set_feature_incompat_mask); 1362 es->s_feature_ro_compat |= 1363 cpu_to_le32(params->set_feature_ro_compat_mask); 1364 es->s_feature_compat &= 1365 ~cpu_to_le32(params->clear_feature_compat_mask); 1366 es->s_feature_incompat &= 1367 ~cpu_to_le32(params->clear_feature_incompat_mask); 1368 es->s_feature_ro_compat &= 1369 ~cpu_to_le32(params->clear_feature_ro_compat_mask); 1370 if (params->set_feature_compat_mask & 1371 EXT4_FEATURE_COMPAT_DIR_INDEX) 1372 es->s_def_hash_version = sbi->s_def_hash_version; 1373 if (params->set_feature_incompat_mask & 1374 EXT4_FEATURE_INCOMPAT_CSUM_SEED) 1375 es->s_checksum_seed = cpu_to_le32(sbi->s_csum_seed); 1376 } 1377 if (params->set_flags & EXT4_TUNE_FL_FORCE_FSCK) 1378 es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 1379 } 1380 1381 static int ext4_ioctl_set_tune_sb(struct file *filp, 1382 struct ext4_tune_sb_params __user *in) 1383 { 1384 struct ext4_tune_sb_params params; 1385 struct super_block *sb = file_inode(filp)->i_sb; 1386 struct ext4_sb_info *sbi = EXT4_SB(sb); 1387 struct ext4_super_block *es = sbi->s_es; 1388 int enabling_casefold = 0; 1389 int ret; 1390 1391 if (!capable(CAP_SYS_ADMIN)) 1392 return -EPERM; 1393 1394 if (copy_from_user(¶ms, in, sizeof(params))) 1395 return -EFAULT; 1396 1397 if ((params.set_flags & ~TUNE_OPS_SUPPORTED) != 0) 1398 return -EOPNOTSUPP; 1399 1400 if ((params.set_flags & EXT4_TUNE_FL_ERRORS_BEHAVIOR) && 1401 (params.errors_behavior > EXT4_ERRORS_PANIC)) 1402 return -EINVAL; 1403 1404 if ((params.set_flags & EXT4_TUNE_FL_RESERVED_BLOCKS) && 1405 (params.reserved_blocks > ext4_blocks_count(sbi->s_es) / 2)) 1406 return -EINVAL; 1407 if ((params.set_flags & EXT4_TUNE_FL_DEF_HASH_ALG) && 1408 ((params.def_hash_alg > DX_HASH_LAST) || 1409 (params.def_hash_alg == DX_HASH_SIPHASH))) 1410 return -EINVAL; 1411 if ((params.set_flags & EXT4_TUNE_FL_FEATURES) && 1412 (params.set_flags & EXT4_TUNE_FL_EDIT_FEATURES)) 1413 return -EINVAL; 1414 1415 if (params.set_flags & EXT4_TUNE_FL_FEATURES) { 1416 params.set_feature_compat_mask = 1417 params.feature_compat & 1418 ~le32_to_cpu(es->s_feature_compat); 1419 params.set_feature_incompat_mask = 1420 params.feature_incompat & 1421 ~le32_to_cpu(es->s_feature_incompat); 1422 params.set_feature_ro_compat_mask = 1423 params.feature_ro_compat & 1424 ~le32_to_cpu(es->s_feature_ro_compat); 1425 params.clear_feature_compat_mask = 1426 ~params.feature_compat & 1427 le32_to_cpu(es->s_feature_compat); 1428 params.clear_feature_incompat_mask = 1429 ~params.feature_incompat & 1430 le32_to_cpu(es->s_feature_incompat); 1431 params.clear_feature_ro_compat_mask = 1432 ~params.feature_ro_compat & 1433 le32_to_cpu(es->s_feature_ro_compat); 1434 params.set_flags |= EXT4_TUNE_FL_EDIT_FEATURES; 1435 } 1436 if (params.set_flags & EXT4_TUNE_FL_EDIT_FEATURES) { 1437 if ((params.set_feature_compat_mask & 1438 ~EXT4_TUNE_SET_COMPAT_SUPP) || 1439 (params.set_feature_incompat_mask & 1440 ~EXT4_TUNE_SET_INCOMPAT_SUPP) || 1441 (params.set_feature_ro_compat_mask & 1442 ~EXT4_TUNE_SET_RO_COMPAT_SUPP) || 1443 (params.clear_feature_compat_mask & 1444 ~EXT4_TUNE_CLEAR_COMPAT_SUPP) || 1445 (params.clear_feature_incompat_mask & 1446 ~EXT4_TUNE_CLEAR_INCOMPAT_SUPP) || 1447 (params.clear_feature_ro_compat_mask & 1448 ~EXT4_TUNE_CLEAR_RO_COMPAT_SUPP)) 1449 return -EOPNOTSUPP; 1450 1451 /* 1452 * Filter out the features that are already set from 1453 * the set_mask. 1454 */ 1455 params.set_feature_compat_mask &= 1456 ~le32_to_cpu(es->s_feature_compat); 1457 params.set_feature_incompat_mask &= 1458 ~le32_to_cpu(es->s_feature_incompat); 1459 params.set_feature_ro_compat_mask &= 1460 ~le32_to_cpu(es->s_feature_ro_compat); 1461 if ((params.set_feature_incompat_mask & 1462 EXT4_FEATURE_INCOMPAT_CASEFOLD)) { 1463 enabling_casefold = 1; 1464 if (!(params.set_flags & EXT4_TUNE_FL_ENCODING)) { 1465 params.encoding = EXT4_ENC_UTF8_12_1; 1466 params.set_flags |= EXT4_TUNE_FL_ENCODING; 1467 } 1468 if (!(params.set_flags & EXT4_TUNE_FL_ENCODING_FLAGS)) { 1469 params.encoding_flags = 0; 1470 params.set_flags |= EXT4_TUNE_FL_ENCODING_FLAGS; 1471 } 1472 } 1473 if ((params.set_feature_compat_mask & 1474 EXT4_FEATURE_COMPAT_DIR_INDEX)) { 1475 uuid_t uu; 1476 1477 memcpy(&uu, sbi->s_hash_seed, UUID_SIZE); 1478 if (uuid_is_null(&uu)) 1479 generate_random_uuid((char *) 1480 &sbi->s_hash_seed); 1481 if (params.set_flags & EXT4_TUNE_FL_DEF_HASH_ALG) 1482 sbi->s_def_hash_version = params.def_hash_alg; 1483 else if (sbi->s_def_hash_version == 0) 1484 sbi->s_def_hash_version = DX_HASH_HALF_MD4; 1485 if (!(es->s_flags & 1486 cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH)) && 1487 !(es->s_flags & 1488 cpu_to_le32(EXT2_FLAGS_SIGNED_HASH))) { 1489 #ifdef __CHAR_UNSIGNED__ 1490 sbi->s_hash_unsigned = 3; 1491 #else 1492 sbi->s_hash_unsigned = 0; 1493 #endif 1494 } 1495 } 1496 } 1497 if (params.set_flags & EXT4_TUNE_FL_ENCODING) { 1498 if (!enabling_casefold) 1499 return -EINVAL; 1500 if (params.encoding == 0) 1501 params.encoding = EXT4_ENC_UTF8_12_1; 1502 else if (params.encoding != EXT4_ENC_UTF8_12_1) 1503 return -EINVAL; 1504 } 1505 if (params.set_flags & EXT4_TUNE_FL_ENCODING_FLAGS) { 1506 if (!enabling_casefold) 1507 return -EINVAL; 1508 if (params.encoding_flags & ~SB_ENC_SUPP_MASK) 1509 return -EINVAL; 1510 } 1511 1512 ret = mnt_want_write_file(filp); 1513 if (ret) 1514 return ret; 1515 1516 ret = ext4_update_superblocks_fn(sb, ext4_sb_setparams, ¶ms); 1517 mnt_drop_write_file(filp); 1518 1519 if (params.set_flags & EXT4_TUNE_FL_DEF_HASH_ALG) 1520 sbi->s_def_hash_version = params.def_hash_alg; 1521 1522 return ret; 1523 } 1524 1525 static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1526 { 1527 struct inode *inode = file_inode(filp); 1528 struct super_block *sb = inode->i_sb; 1529 struct mnt_idmap *idmap = file_mnt_idmap(filp); 1530 1531 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); 1532 1533 switch (cmd) { 1534 case FS_IOC_GETFSMAP: 1535 return ext4_ioc_getfsmap(sb, (void __user *)arg); 1536 case EXT4_IOC_GETVERSION: 1537 case EXT4_IOC_GETVERSION_OLD: 1538 return put_user(inode->i_generation, (int __user *) arg); 1539 case EXT4_IOC_SETVERSION: 1540 case EXT4_IOC_SETVERSION_OLD: { 1541 handle_t *handle; 1542 struct ext4_iloc iloc; 1543 __u32 generation; 1544 int err; 1545 1546 if (!inode_owner_or_capable(idmap, inode)) 1547 return -EPERM; 1548 1549 if (ext4_has_feature_metadata_csum(inode->i_sb)) { 1550 ext4_warning(sb, "Setting inode version is not " 1551 "supported with metadata_csum enabled."); 1552 return -ENOTTY; 1553 } 1554 1555 err = mnt_want_write_file(filp); 1556 if (err) 1557 return err; 1558 if (get_user(generation, (int __user *) arg)) { 1559 err = -EFAULT; 1560 goto setversion_out; 1561 } 1562 1563 inode_lock(inode); 1564 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 1565 if (IS_ERR(handle)) { 1566 err = PTR_ERR(handle); 1567 goto unlock_out; 1568 } 1569 err = ext4_reserve_inode_write(handle, inode, &iloc); 1570 if (err == 0) { 1571 inode_set_ctime_current(inode); 1572 inode_inc_iversion(inode); 1573 inode->i_generation = generation; 1574 err = ext4_mark_iloc_dirty(handle, inode, &iloc); 1575 } 1576 ext4_journal_stop(handle); 1577 1578 unlock_out: 1579 inode_unlock(inode); 1580 setversion_out: 1581 mnt_drop_write_file(filp); 1582 return err; 1583 } 1584 case EXT4_IOC_GROUP_EXTEND: { 1585 ext4_fsblk_t n_blocks_count; 1586 int err, err2=0; 1587 1588 err = ext4_resize_begin(sb); 1589 if (err) 1590 return err; 1591 1592 if (get_user(n_blocks_count, (__u32 __user *)arg)) { 1593 err = -EFAULT; 1594 goto group_extend_out; 1595 } 1596 1597 if (ext4_has_feature_bigalloc(sb)) { 1598 ext4_msg(sb, KERN_ERR, 1599 "Online resizing not supported with bigalloc"); 1600 err = -EOPNOTSUPP; 1601 goto group_extend_out; 1602 } 1603 1604 err = mnt_want_write_file(filp); 1605 if (err) 1606 goto group_extend_out; 1607 1608 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); 1609 if (EXT4_SB(sb)->s_journal) { 1610 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 1611 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 1612 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 1613 } 1614 if (err == 0) 1615 err = err2; 1616 mnt_drop_write_file(filp); 1617 group_extend_out: 1618 err2 = ext4_resize_end(sb, false); 1619 if (err == 0) 1620 err = err2; 1621 return err; 1622 } 1623 1624 case EXT4_IOC_MOVE_EXT: { 1625 struct move_extent me; 1626 int err; 1627 1628 if (!(filp->f_mode & FMODE_READ) || 1629 !(filp->f_mode & FMODE_WRITE)) 1630 return -EBADF; 1631 1632 if (copy_from_user(&me, 1633 (struct move_extent __user *)arg, sizeof(me))) 1634 return -EFAULT; 1635 me.moved_len = 0; 1636 1637 CLASS(fd, donor)(me.donor_fd); 1638 if (fd_empty(donor)) 1639 return -EBADF; 1640 1641 if (!(fd_file(donor)->f_mode & FMODE_WRITE)) 1642 return -EBADF; 1643 1644 if (ext4_has_feature_bigalloc(sb)) { 1645 ext4_msg(sb, KERN_ERR, 1646 "Online defrag not supported with bigalloc"); 1647 return -EOPNOTSUPP; 1648 } else if (IS_DAX(inode)) { 1649 ext4_msg(sb, KERN_ERR, 1650 "Online defrag not supported with DAX"); 1651 return -EOPNOTSUPP; 1652 } 1653 1654 err = mnt_want_write_file(filp); 1655 if (err) 1656 return err; 1657 1658 err = ext4_move_extents(filp, fd_file(donor), me.orig_start, 1659 me.donor_start, me.len, &me.moved_len); 1660 mnt_drop_write_file(filp); 1661 1662 if (copy_to_user((struct move_extent __user *)arg, 1663 &me, sizeof(me))) 1664 err = -EFAULT; 1665 return err; 1666 } 1667 1668 case EXT4_IOC_GROUP_ADD: { 1669 struct ext4_new_group_data input; 1670 1671 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, 1672 sizeof(input))) 1673 return -EFAULT; 1674 1675 return ext4_ioctl_group_add(filp, &input); 1676 } 1677 1678 case EXT4_IOC_MIGRATE: 1679 { 1680 int err; 1681 if (!inode_owner_or_capable(idmap, inode)) 1682 return -EACCES; 1683 1684 err = mnt_want_write_file(filp); 1685 if (err) 1686 return err; 1687 /* 1688 * inode_mutex prevent write and truncate on the file. 1689 * Read still goes through. We take i_data_sem in 1690 * ext4_ext_swap_inode_data before we switch the 1691 * inode format to prevent read. 1692 */ 1693 inode_lock((inode)); 1694 err = ext4_ext_migrate(inode); 1695 inode_unlock((inode)); 1696 mnt_drop_write_file(filp); 1697 return err; 1698 } 1699 1700 case EXT4_IOC_ALLOC_DA_BLKS: 1701 { 1702 int err; 1703 if (!inode_owner_or_capable(idmap, inode)) 1704 return -EACCES; 1705 1706 err = mnt_want_write_file(filp); 1707 if (err) 1708 return err; 1709 err = ext4_alloc_da_blocks(inode); 1710 mnt_drop_write_file(filp); 1711 return err; 1712 } 1713 1714 case EXT4_IOC_SWAP_BOOT: 1715 { 1716 int err; 1717 if (!(filp->f_mode & FMODE_WRITE)) 1718 return -EBADF; 1719 err = mnt_want_write_file(filp); 1720 if (err) 1721 return err; 1722 err = swap_inode_boot_loader(sb, idmap, inode); 1723 mnt_drop_write_file(filp); 1724 return err; 1725 } 1726 1727 case EXT4_IOC_RESIZE_FS: { 1728 ext4_fsblk_t n_blocks_count; 1729 int err = 0, err2 = 0; 1730 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; 1731 1732 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, 1733 sizeof(__u64))) { 1734 return -EFAULT; 1735 } 1736 1737 err = ext4_resize_begin(sb); 1738 if (err) 1739 return err; 1740 1741 err = mnt_want_write_file(filp); 1742 if (err) 1743 goto resizefs_out; 1744 1745 err = ext4_resize_fs(sb, n_blocks_count); 1746 if (EXT4_SB(sb)->s_journal) { 1747 ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE, NULL); 1748 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 1749 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 1750 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 1751 } 1752 if (err == 0) 1753 err = err2; 1754 mnt_drop_write_file(filp); 1755 if (!err && (o_group < EXT4_SB(sb)->s_groups_count) && 1756 ext4_has_group_desc_csum(sb) && 1757 test_opt(sb, INIT_INODE_TABLE)) 1758 err = ext4_register_li_request(sb, o_group); 1759 1760 resizefs_out: 1761 err2 = ext4_resize_end(sb, true); 1762 if (err == 0) 1763 err = err2; 1764 return err; 1765 } 1766 1767 case FITRIM: 1768 { 1769 struct fstrim_range range; 1770 int ret = 0; 1771 1772 if (!capable(CAP_SYS_ADMIN)) 1773 return -EPERM; 1774 1775 if (!bdev_max_discard_sectors(sb->s_bdev)) 1776 return -EOPNOTSUPP; 1777 1778 /* 1779 * We haven't replayed the journal, so we cannot use our 1780 * block-bitmap-guided storage zapping commands. 1781 */ 1782 if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) 1783 return -EROFS; 1784 1785 if (copy_from_user(&range, (struct fstrim_range __user *)arg, 1786 sizeof(range))) 1787 return -EFAULT; 1788 1789 ret = ext4_trim_fs(sb, &range); 1790 if (ret < 0) 1791 return ret; 1792 1793 if (copy_to_user((struct fstrim_range __user *)arg, &range, 1794 sizeof(range))) 1795 return -EFAULT; 1796 1797 return 0; 1798 } 1799 case EXT4_IOC_PRECACHE_EXTENTS: 1800 { 1801 int ret; 1802 1803 inode_lock_shared(inode); 1804 ret = ext4_ext_precache(inode); 1805 inode_unlock_shared(inode); 1806 return ret; 1807 } 1808 case FS_IOC_SET_ENCRYPTION_POLICY: 1809 if (!ext4_has_feature_encrypt(sb)) 1810 return -EOPNOTSUPP; 1811 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg); 1812 1813 case FS_IOC_GET_ENCRYPTION_PWSALT: 1814 return ext4_ioctl_get_encryption_pwsalt(filp, (void __user *)arg); 1815 1816 case FS_IOC_GET_ENCRYPTION_POLICY: 1817 if (!ext4_has_feature_encrypt(sb)) 1818 return -EOPNOTSUPP; 1819 return fscrypt_ioctl_get_policy(filp, (void __user *)arg); 1820 1821 case FS_IOC_GET_ENCRYPTION_POLICY_EX: 1822 if (!ext4_has_feature_encrypt(sb)) 1823 return -EOPNOTSUPP; 1824 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg); 1825 1826 case FS_IOC_ADD_ENCRYPTION_KEY: 1827 if (!ext4_has_feature_encrypt(sb)) 1828 return -EOPNOTSUPP; 1829 return fscrypt_ioctl_add_key(filp, (void __user *)arg); 1830 1831 case FS_IOC_REMOVE_ENCRYPTION_KEY: 1832 if (!ext4_has_feature_encrypt(sb)) 1833 return -EOPNOTSUPP; 1834 return fscrypt_ioctl_remove_key(filp, (void __user *)arg); 1835 1836 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS: 1837 if (!ext4_has_feature_encrypt(sb)) 1838 return -EOPNOTSUPP; 1839 return fscrypt_ioctl_remove_key_all_users(filp, 1840 (void __user *)arg); 1841 case FS_IOC_GET_ENCRYPTION_KEY_STATUS: 1842 if (!ext4_has_feature_encrypt(sb)) 1843 return -EOPNOTSUPP; 1844 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg); 1845 1846 case FS_IOC_GET_ENCRYPTION_NONCE: 1847 if (!ext4_has_feature_encrypt(sb)) 1848 return -EOPNOTSUPP; 1849 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg); 1850 1851 case EXT4_IOC_CLEAR_ES_CACHE: 1852 { 1853 if (!inode_owner_or_capable(idmap, inode)) 1854 return -EACCES; 1855 ext4_clear_inode_es(inode); 1856 return 0; 1857 } 1858 1859 case EXT4_IOC_GETSTATE: 1860 { 1861 __u32 state = 0; 1862 1863 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED)) 1864 state |= EXT4_STATE_FLAG_EXT_PRECACHED; 1865 if (ext4_test_inode_state(inode, EXT4_STATE_NEW)) 1866 state |= EXT4_STATE_FLAG_NEW; 1867 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY)) 1868 state |= EXT4_STATE_FLAG_NEWENTRY; 1869 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE)) 1870 state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE; 1871 1872 return put_user(state, (__u32 __user *) arg); 1873 } 1874 1875 case EXT4_IOC_GET_ES_CACHE: 1876 return ext4_ioctl_get_es_cache(filp, arg); 1877 1878 case EXT4_IOC_SHUTDOWN: 1879 return ext4_ioctl_shutdown(sb, arg); 1880 1881 case FS_IOC_ENABLE_VERITY: 1882 if (!ext4_has_feature_verity(sb)) 1883 return -EOPNOTSUPP; 1884 return fsverity_ioctl_enable(filp, (const void __user *)arg); 1885 1886 case FS_IOC_MEASURE_VERITY: 1887 if (!ext4_has_feature_verity(sb)) 1888 return -EOPNOTSUPP; 1889 return fsverity_ioctl_measure(filp, (void __user *)arg); 1890 1891 case FS_IOC_READ_VERITY_METADATA: 1892 if (!ext4_has_feature_verity(sb)) 1893 return -EOPNOTSUPP; 1894 return fsverity_ioctl_read_metadata(filp, 1895 (const void __user *)arg); 1896 1897 case EXT4_IOC_CHECKPOINT: 1898 return ext4_ioctl_checkpoint(filp, arg); 1899 1900 case FS_IOC_GETFSLABEL: 1901 return ext4_ioctl_getlabel(EXT4_SB(sb), (void __user *)arg); 1902 1903 case FS_IOC_SETFSLABEL: 1904 return ext4_ioctl_setlabel(filp, 1905 (const void __user *)arg); 1906 1907 case EXT4_IOC_GETFSUUID: 1908 return ext4_ioctl_getuuid(EXT4_SB(sb), (void __user *)arg); 1909 case EXT4_IOC_SETFSUUID: 1910 return ext4_ioctl_setuuid(filp, (const void __user *)arg); 1911 case EXT4_IOC_GET_TUNE_SB_PARAM: 1912 return ext4_ioctl_get_tune_sb(EXT4_SB(sb), 1913 (void __user *)arg); 1914 case EXT4_IOC_SET_TUNE_SB_PARAM: 1915 return ext4_ioctl_set_tune_sb(filp, (void __user *)arg); 1916 default: 1917 return -ENOTTY; 1918 } 1919 } 1920 1921 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1922 { 1923 return __ext4_ioctl(filp, cmd, arg); 1924 } 1925 1926 #ifdef CONFIG_COMPAT 1927 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 1928 { 1929 /* These are just misnamed, they actually get/put from/to user an int */ 1930 switch (cmd) { 1931 case EXT4_IOC32_GETVERSION: 1932 cmd = EXT4_IOC_GETVERSION; 1933 break; 1934 case EXT4_IOC32_SETVERSION: 1935 cmd = EXT4_IOC_SETVERSION; 1936 break; 1937 case EXT4_IOC32_GROUP_EXTEND: 1938 cmd = EXT4_IOC_GROUP_EXTEND; 1939 break; 1940 case EXT4_IOC32_GETVERSION_OLD: 1941 cmd = EXT4_IOC_GETVERSION_OLD; 1942 break; 1943 case EXT4_IOC32_SETVERSION_OLD: 1944 cmd = EXT4_IOC_SETVERSION_OLD; 1945 break; 1946 case EXT4_IOC32_GETRSVSZ: 1947 cmd = EXT4_IOC_GETRSVSZ; 1948 break; 1949 case EXT4_IOC32_SETRSVSZ: 1950 cmd = EXT4_IOC_SETRSVSZ; 1951 break; 1952 case EXT4_IOC32_GROUP_ADD: { 1953 struct compat_ext4_new_group_input __user *uinput; 1954 struct ext4_new_group_data input; 1955 int err; 1956 1957 uinput = compat_ptr(arg); 1958 err = get_user(input.group, &uinput->group); 1959 err |= get_user(input.block_bitmap, &uinput->block_bitmap); 1960 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); 1961 err |= get_user(input.inode_table, &uinput->inode_table); 1962 err |= get_user(input.blocks_count, &uinput->blocks_count); 1963 err |= get_user(input.reserved_blocks, 1964 &uinput->reserved_blocks); 1965 if (err) 1966 return -EFAULT; 1967 return ext4_ioctl_group_add(file, &input); 1968 } 1969 case EXT4_IOC_MOVE_EXT: 1970 case EXT4_IOC_RESIZE_FS: 1971 case FITRIM: 1972 case EXT4_IOC_PRECACHE_EXTENTS: 1973 case FS_IOC_SET_ENCRYPTION_POLICY: 1974 case FS_IOC_GET_ENCRYPTION_PWSALT: 1975 case FS_IOC_GET_ENCRYPTION_POLICY: 1976 case FS_IOC_GET_ENCRYPTION_POLICY_EX: 1977 case FS_IOC_ADD_ENCRYPTION_KEY: 1978 case FS_IOC_REMOVE_ENCRYPTION_KEY: 1979 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS: 1980 case FS_IOC_GET_ENCRYPTION_KEY_STATUS: 1981 case FS_IOC_GET_ENCRYPTION_NONCE: 1982 case EXT4_IOC_SHUTDOWN: 1983 case FS_IOC_GETFSMAP: 1984 case FS_IOC_ENABLE_VERITY: 1985 case FS_IOC_MEASURE_VERITY: 1986 case FS_IOC_READ_VERITY_METADATA: 1987 case EXT4_IOC_CLEAR_ES_CACHE: 1988 case EXT4_IOC_GETSTATE: 1989 case EXT4_IOC_GET_ES_CACHE: 1990 case EXT4_IOC_CHECKPOINT: 1991 case FS_IOC_GETFSLABEL: 1992 case FS_IOC_SETFSLABEL: 1993 case EXT4_IOC_GETFSUUID: 1994 case EXT4_IOC_SETFSUUID: 1995 break; 1996 default: 1997 return -ENOIOCTLCMD; 1998 } 1999 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); 2000 } 2001 #endif 2002 2003 static void set_overhead(struct ext4_sb_info *sbi, 2004 struct ext4_super_block *es, const void *arg) 2005 { 2006 es->s_overhead_clusters = cpu_to_le32(*((unsigned long *) arg)); 2007 } 2008 2009 int ext4_update_overhead(struct super_block *sb, bool force) 2010 { 2011 struct ext4_sb_info *sbi = EXT4_SB(sb); 2012 2013 if (ext4_emergency_state(sb) || sb_rdonly(sb)) 2014 return 0; 2015 if (!force && 2016 (sbi->s_overhead == 0 || 2017 sbi->s_overhead == le32_to_cpu(sbi->s_es->s_overhead_clusters))) 2018 return 0; 2019 return ext4_update_superblocks_fn(sb, set_overhead, &sbi->s_overhead); 2020 } 2021