fs/ext4/ioctl.c

   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/uuid.h>
  20 #include <linux/uaccess.h>
  21 #include <linux/delay.h>
  22 #include <linux/iversion.h>
  23 #include <linux/fileattr.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 /**
  31  * Swap memory between @a and @b for @len bytes.
  32  *
  33  * @a:          pointer to first memory area
  34  * @b:          pointer to second memory area
  35  * @len:        number of bytes to swap
  36  *
  37  */
  38 static void memswap(void *a, void *b, size_t len)
  39 {
  40         unsigned char *ap, *bp;
  41
  42         ap = (unsigned char *)a;
  43         bp = (unsigned char *)b;
  44         while (len-- > 0) {
  45                 swap(*ap, *bp);
  46                 ap++;
  47                 bp++;
  48         }
  49 }
  50
  51 /**
  52  * Swap i_data and associated attributes between @inode1 and @inode2.
  53  * This function is used for the primary swap between inode1 and inode2
  54  * and also to revert this primary swap in case of errors.
  55  *
  56  * Therefore you have to make sure, that calling this method twice
  57  * will revert all changes.
  58  *
  59  * @inode1:     pointer to first inode
  60  * @inode2:     pointer to second inode
  61  */
  62 static void swap_inode_data(struct inode *inode1, struct inode *inode2)
  63 {
  64         loff_t isize;
  65         struct ext4_inode_info *ei1;
  66         struct ext4_inode_info *ei2;
  67         unsigned long tmp;
  68
  69         ei1 = EXT4_I(inode1);
  70         ei2 = EXT4_I(inode2);
  71
  72         swap(inode1->i_version, inode2->i_version);
  73         swap(inode1->i_atime, inode2->i_atime);
  74         swap(inode1->i_mtime, inode2->i_mtime);
  75
  76         memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
  77         tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP;
  78         ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) |
  79                 (ei1->i_flags & ~EXT4_FL_SHOULD_SWAP);
  80         ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP);
  81         swap(ei1->i_disksize, ei2->i_disksize);
  82         ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
  83         ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
  84
  85         isize = i_size_read(inode1);
  86         i_size_write(inode1, i_size_read(inode2));
  87         i_size_write(inode2, isize);
  88 }
  89
  90 void ext4_reset_inode_seed(struct inode *inode)
  91 {
  92         struct ext4_inode_info *ei = EXT4_I(inode);
  93         struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
  94         __le32 inum = cpu_to_le32(inode->i_ino);
  95         __le32 gen = cpu_to_le32(inode->i_generation);
  96         __u32 csum;
  97
  98         if (!ext4_has_metadata_csum(inode->i_sb))
  99                 return;
 100
 101         csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum));
 102         ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen));
 103 }
 104
 105 /**
 106  * Swap the information from the given @inode and the inode
 107  * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
 108  * important fields of the inodes.
 109  *
 110  * @sb:         the super block of the filesystem
 111  * @mnt_userns: user namespace of the mount the inode was found from
 112  * @inode:      the inode to swap with EXT4_BOOT_LOADER_INO
 113  *
 114  */
 115 static long swap_inode_boot_loader(struct super_block *sb,
 116                                 struct user_namespace *mnt_userns,
 117                                 struct inode *inode)
 118 {
 119         handle_t *handle;
 120         int err;
 121         struct inode *inode_bl;
 122         struct ext4_inode_info *ei_bl;
 123         qsize_t size, size_bl, diff;
 124         blkcnt_t blocks;
 125         unsigned short bytes;
 126
 127         inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO, EXT4_IGET_SPECIAL);
 128         if (IS_ERR(inode_bl))
 129                 return PTR_ERR(inode_bl);
 130         ei_bl = EXT4_I(inode_bl);
 131
 132         /* Protect orig inodes against a truncate and make sure,
 133          * that only 1 swap_inode_boot_loader is running. */
 134         lock_two_nondirectories(inode, inode_bl);
 135
 136         if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
 137             IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
 138             (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
 139             ext4_has_inline_data(inode)) {
 140                 err = -EINVAL;
 141                 goto journal_err_out;
 142         }
 143
 144         if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
 145             !inode_owner_or_capable(mnt_userns, inode) ||
 146             !capable(CAP_SYS_ADMIN)) {
 147                 err = -EPERM;
 148                 goto journal_err_out;
 149         }
 150
 151         filemap_invalidate_lock(inode->i_mapping);
 152         err = filemap_write_and_wait(inode->i_mapping);
 153         if (err)
 154                 goto err_out;
 155
 156         err = filemap_write_and_wait(inode_bl->i_mapping);
 157         if (err)
 158                 goto err_out;
 159
 160         /* Wait for all existing dio workers */
 161         inode_dio_wait(inode);
 162         inode_dio_wait(inode_bl);
 163
 164         truncate_inode_pages(&inode->i_data, 0);
 165         truncate_inode_pages(&inode_bl->i_data, 0);
 166
 167         handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
 168         if (IS_ERR(handle)) {
 169                 err = -EINVAL;
 170                 goto err_out;
 171         }
 172         ext4_fc_start_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT);
 173
 174         /* Protect extent tree against block allocations via delalloc */
 175         ext4_double_down_write_data_sem(inode, inode_bl);
 176
 177         if (inode_bl->i_nlink == 0) {
 178                 /* this inode has never been used as a BOOT_LOADER */
 179                 set_nlink(inode_bl, 1);
 180                 i_uid_write(inode_bl, 0);
 181                 i_gid_write(inode_bl, 0);
 182                 inode_bl->i_flags = 0;
 183                 ei_bl->i_flags = 0;
 184                 inode_set_iversion(inode_bl, 1);
 185                 i_size_write(inode_bl, 0);
 186                 inode_bl->i_mode = S_IFREG;
 187                 if (ext4_has_feature_extents(sb)) {
 188                         ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
 189                         ext4_ext_tree_init(handle, inode_bl);
 190                 } else
 191                         memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
 192         }
 193
 194         err = dquot_initialize(inode);
 195         if (err)
 196                 goto err_out1;
 197
 198         size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
 199         size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
 200         diff = size - size_bl;
 201         swap_inode_data(inode, inode_bl);
 202
 203         inode->i_ctime = inode_bl->i_ctime = current_time(inode);
 204
 205         inode->i_generation = prandom_u32();
 206         inode_bl->i_generation = prandom_u32();
 207         ext4_reset_inode_seed(inode);
 208         ext4_reset_inode_seed(inode_bl);
 209
 210         ext4_discard_preallocations(inode, 0);
 211
 212         err = ext4_mark_inode_dirty(handle, inode);
 213         if (err < 0) {
 214                 /* No need to update quota information. */
 215                 ext4_warning(inode->i_sb,
 216                         "couldn't mark inode #%lu dirty (err %d)",
 217                         inode->i_ino, err);
 218                 /* Revert all changes: */
 219                 swap_inode_data(inode, inode_bl);
 220                 ext4_mark_inode_dirty(handle, inode);
 221                 goto err_out1;
 222         }
 223
 224         blocks = inode_bl->i_blocks;
 225         bytes = inode_bl->i_bytes;
 226         inode_bl->i_blocks = inode->i_blocks;
 227         inode_bl->i_bytes = inode->i_bytes;
 228         err = ext4_mark_inode_dirty(handle, inode_bl);
 229         if (err < 0) {
 230                 /* No need to update quota information. */
 231                 ext4_warning(inode_bl->i_sb,
 232                         "couldn't mark inode #%lu dirty (err %d)",
 233                         inode_bl->i_ino, err);
 234                 goto revert;
 235         }
 236
 237         /* Bootloader inode should not be counted into quota information. */
 238         if (diff > 0)
 239                 dquot_free_space(inode, diff);
 240         else
 241                 err = dquot_alloc_space(inode, -1 * diff);
 242
 243         if (err < 0) {
 244 revert:
 245                 /* Revert all changes: */
 246                 inode_bl->i_blocks = blocks;
 247                 inode_bl->i_bytes = bytes;
 248                 swap_inode_data(inode, inode_bl);
 249                 ext4_mark_inode_dirty(handle, inode);
 250                 ext4_mark_inode_dirty(handle, inode_bl);
 251         }
 252
 253 err_out1:
 254         ext4_journal_stop(handle);
 255         ext4_fc_stop_ineligible(sb);
 256         ext4_double_up_write_data_sem(inode, inode_bl);
 257
 258 err_out:
 259         filemap_invalidate_unlock(inode->i_mapping);
 260 journal_err_out:
 261         unlock_two_nondirectories(inode, inode_bl);
 262         iput(inode_bl);
 263         return err;
 264 }
 265
 266 #ifdef CONFIG_FS_ENCRYPTION
 267 static int uuid_is_zero(__u8 u[16])
 268 {
 269         int     i;
 270
 271         for (i = 0; i < 16; i++)
 272                 if (u[i])
 273                         return 0;
 274         return 1;
 275 }
 276 #endif
 277
 278 /*
 279  * If immutable is set and we are not clearing it, we're not allowed to change
 280  * anything else in the inode.  Don't error out if we're only trying to set
 281  * immutable on an immutable file.
 282  */
 283 static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
 284                                       unsigned int flags)
 285 {
 286         struct ext4_inode_info *ei = EXT4_I(inode);
 287         unsigned int oldflags = ei->i_flags;
 288
 289         if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
 290                 return 0;
 291
 292         if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
 293                 return -EPERM;
 294         if (ext4_has_feature_project(inode->i_sb) &&
 295             __kprojid_val(ei->i_projid) != new_projid)
 296                 return -EPERM;
 297
 298         return 0;
 299 }
 300
 301 static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
 302 {
 303         struct ext4_inode_info *ei = EXT4_I(inode);
 304
 305         if (S_ISDIR(inode->i_mode))
 306                 return;
 307
 308         if (test_opt2(inode->i_sb, DAX_NEVER) ||
 309             test_opt(inode->i_sb, DAX_ALWAYS))
 310                 return;
 311
 312         if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
 313                 d_mark_dontcache(inode);
 314 }
 315
 316 static bool dax_compatible(struct inode *inode, unsigned int oldflags,
 317                            unsigned int flags)
 318 {
 319         /* Allow the DAX flag to be changed on inline directories */
 320         if (S_ISDIR(inode->i_mode)) {
 321                 flags &= ~EXT4_INLINE_DATA_FL;
 322                 oldflags &= ~EXT4_INLINE_DATA_FL;
 323         }
 324
 325         if (flags & EXT4_DAX_FL) {
 326                 if ((oldflags & EXT4_DAX_MUT_EXCL) ||
 327                      ext4_test_inode_state(inode,
 328                                           EXT4_STATE_VERITY_IN_PROGRESS)) {
 329                         return false;
 330                 }
 331         }
 332
 333         if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
 334                         return false;
 335
 336         return true;
 337 }
 338
 339 static int ext4_ioctl_setflags(struct inode *inode,
 340                                unsigned int flags)
 341 {
 342         struct ext4_inode_info *ei = EXT4_I(inode);
 343         handle_t *handle = NULL;
 344         int err = -EPERM, migrate = 0;
 345         struct ext4_iloc iloc;
 346         unsigned int oldflags, mask, i;
 347         struct super_block *sb = inode->i_sb;
 348
 349         /* Is it quota file? Do not allow user to mess with it */
 350         if (ext4_is_quota_file(inode))
 351                 goto flags_out;
 352
 353         oldflags = ei->i_flags;
 354         /*
 355          * The JOURNAL_DATA flag can only be changed by
 356          * the relevant capability.
 357          */
 358         if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
 359                 if (!capable(CAP_SYS_RESOURCE))
 360                         goto flags_out;
 361         }
 362
 363         if (!dax_compatible(inode, oldflags, flags)) {
 364                 err = -EOPNOTSUPP;
 365                 goto flags_out;
 366         }
 367
 368         if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
 369                 migrate = 1;
 370
 371         if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
 372                 if (!ext4_has_feature_casefold(sb)) {
 373                         err = -EOPNOTSUPP;
 374                         goto flags_out;
 375                 }
 376
 377                 if (!S_ISDIR(inode->i_mode)) {
 378                         err = -ENOTDIR;
 379                         goto flags_out;
 380                 }
 381
 382                 if (!ext4_empty_dir(inode)) {
 383                         err = -ENOTEMPTY;
 384                         goto flags_out;
 385                 }
 386         }
 387
 388         /*
 389          * Wait for all pending directio and then flush all the dirty pages
 390          * for this file.  The flush marks all the pages readonly, so any
 391          * subsequent attempt to write to the file (particularly mmap pages)
 392          * will come through the filesystem and fail.
 393          */
 394         if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
 395             (flags & EXT4_IMMUTABLE_FL)) {
 396                 inode_dio_wait(inode);
 397                 err = filemap_write_and_wait(inode->i_mapping);
 398                 if (err)
 399                         goto flags_out;
 400         }
 401
 402         handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
 403         if (IS_ERR(handle)) {
 404                 err = PTR_ERR(handle);
 405                 goto flags_out;
 406         }
 407         if (IS_SYNC(inode))
 408                 ext4_handle_sync(handle);
 409         err = ext4_reserve_inode_write(handle, inode, &iloc);
 410         if (err)
 411                 goto flags_err;
 412
 413         ext4_dax_dontcache(inode, flags);
 414
 415         for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
 416                 if (!(mask & EXT4_FL_USER_MODIFIABLE))
 417                         continue;
 418                 /* These flags get special treatment later */
 419                 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
 420                         continue;
 421                 if (mask & flags)
 422                         ext4_set_inode_flag(inode, i);
 423                 else
 424                         ext4_clear_inode_flag(inode, i);
 425         }
 426
 427         ext4_set_inode_flags(inode, false);
 428
 429         inode->i_ctime = current_time(inode);
 430
 431         err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 432 flags_err:
 433         ext4_journal_stop(handle);
 434         if (err)
 435                 goto flags_out;
 436
 437         if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
 438                 /*
 439                  * Changes to the journaling mode can cause unsafe changes to
 440                  * S_DAX if the inode is DAX
 441                  */
 442                 if (IS_DAX(inode)) {
 443                         err = -EBUSY;
 444                         goto flags_out;
 445                 }
 446
 447                 err = ext4_change_inode_journal_flag(inode,
 448                                                      flags & EXT4_JOURNAL_DATA_FL);
 449                 if (err)
 450                         goto flags_out;
 451         }
 452         if (migrate) {
 453                 if (flags & EXT4_EXTENTS_FL)
 454                         err = ext4_ext_migrate(inode);
 455                 else
 456                         err = ext4_ind_migrate(inode);
 457         }
 458
 459 flags_out:
 460         return err;
 461 }
 462
 463 #ifdef CONFIG_QUOTA
 464 static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
 465 {
 466         struct super_block *sb = inode->i_sb;
 467         struct ext4_inode_info *ei = EXT4_I(inode);
 468         int err, rc;
 469         handle_t *handle;
 470         kprojid_t kprojid;
 471         struct ext4_iloc iloc;
 472         struct ext4_inode *raw_inode;
 473         struct dquot *transfer_to[MAXQUOTAS] = { };
 474
 475         if (!ext4_has_feature_project(sb)) {
 476                 if (projid != EXT4_DEF_PROJID)
 477                         return -EOPNOTSUPP;
 478                 else
 479                         return 0;
 480         }
 481
 482         if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
 483                 return -EOPNOTSUPP;
 484
 485         kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
 486
 487         if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
 488                 return 0;
 489
 490         err = -EPERM;
 491         /* Is it quota file? Do not allow user to mess with it */
 492         if (ext4_is_quota_file(inode))
 493                 return err;
 494
 495         err = ext4_get_inode_loc(inode, &iloc);
 496         if (err)
 497                 return err;
 498
 499         raw_inode = ext4_raw_inode(&iloc);
 500         if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
 501                 err = ext4_expand_extra_isize(inode,
 502                                               EXT4_SB(sb)->s_want_extra_isize,
 503                                               &iloc);
 504                 if (err)
 505                         return err;
 506         } else {
 507                 brelse(iloc.bh);
 508         }
 509
 510         err = dquot_initialize(inode);
 511         if (err)
 512                 return err;
 513
 514         handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
 515                 EXT4_QUOTA_INIT_BLOCKS(sb) +
 516                 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
 517         if (IS_ERR(handle))
 518                 return PTR_ERR(handle);
 519
 520         err = ext4_reserve_inode_write(handle, inode, &iloc);
 521         if (err)
 522                 goto out_stop;
 523
 524         transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
 525         if (!IS_ERR(transfer_to[PRJQUOTA])) {
 526
 527                 /* __dquot_transfer() calls back ext4_get_inode_usage() which
 528                  * counts xattr inode references.
 529                  */
 530                 down_read(&EXT4_I(inode)->xattr_sem);
 531                 err = __dquot_transfer(inode, transfer_to);
 532                 up_read(&EXT4_I(inode)->xattr_sem);
 533                 dqput(transfer_to[PRJQUOTA]);
 534                 if (err)
 535                         goto out_dirty;
 536         }
 537
 538         EXT4_I(inode)->i_projid = kprojid;
 539         inode->i_ctime = current_time(inode);
 540 out_dirty:
 541         rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
 542         if (!err)
 543                 err = rc;
 544 out_stop:
 545         ext4_journal_stop(handle);
 546         return err;
 547 }
 548 #else
 549 static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
 550 {
 551         if (projid != EXT4_DEF_PROJID)
 552                 return -EOPNOTSUPP;
 553         return 0;
 554 }
 555 #endif
 556
 557 static int ext4_shutdown(struct super_block *sb, unsigned long arg)
 558 {
 559         struct ext4_sb_info *sbi = EXT4_SB(sb);
 560         __u32 flags;
 561
 562         if (!capable(CAP_SYS_ADMIN))
 563                 return -EPERM;
 564
 565         if (get_user(flags, (__u32 __user *)arg))
 566                 return -EFAULT;
 567
 568         if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
 569                 return -EINVAL;
 570
 571         if (ext4_forced_shutdown(sbi))
 572                 return 0;
 573
 574         ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
 575         trace_ext4_shutdown(sb, flags);
 576
 577         switch (flags) {
 578         case EXT4_GOING_FLAGS_DEFAULT:
 579                 freeze_bdev(sb->s_bdev);
 580                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 581                 thaw_bdev(sb->s_bdev);
 582                 break;
 583         case EXT4_GOING_FLAGS_LOGFLUSH:
 584                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 585                 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
 586                         (void) ext4_force_commit(sb);
 587                         jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
 588                 }
 589                 break;
 590         case EXT4_GOING_FLAGS_NOLOGFLUSH:
 591                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 592                 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
 593                         jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
 594                 break;
 595         default:
 596                 return -EINVAL;
 597         }
 598         clear_opt(sb, DISCARD);
 599         return 0;
 600 }
 601
 602 struct getfsmap_info {
 603         struct super_block      *gi_sb;
 604         struct fsmap_head __user *gi_data;
 605         unsigned int            gi_idx;
 606         __u32                   gi_last_flags;
 607 };
 608
 609 static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
 610 {
 611         struct getfsmap_info *info = priv;
 612         struct fsmap fm;
 613
 614         trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
 615
 616         info->gi_last_flags = xfm->fmr_flags;
 617         ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
 618         if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
 619                         sizeof(struct fsmap)))
 620                 return -EFAULT;
 621
 622         return 0;
 623 }
 624
 625 static int ext4_ioc_getfsmap(struct super_block *sb,
 626                              struct fsmap_head __user *arg)
 627 {
 628         struct getfsmap_info info = { NULL };
 629         struct ext4_fsmap_head xhead = {0};
 630         struct fsmap_head head;
 631         bool aborted = false;
 632         int error;
 633
 634         if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
 635                 return -EFAULT;
 636         if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
 637             memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
 638                        sizeof(head.fmh_keys[0].fmr_reserved)) ||
 639             memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
 640                        sizeof(head.fmh_keys[1].fmr_reserved)))
 641                 return -EINVAL;
 642         /*
 643          * ext4 doesn't report file extents at all, so the only valid
 644          * file offsets are the magic ones (all zeroes or all ones).
 645          */
 646         if (head.fmh_keys[0].fmr_offset ||
 647             (head.fmh_keys[1].fmr_offset != 0 &&
 648              head.fmh_keys[1].fmr_offset != -1ULL))
 649                 return -EINVAL;
 650
 651         xhead.fmh_iflags = head.fmh_iflags;
 652         xhead.fmh_count = head.fmh_count;
 653         ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
 654         ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
 655
 656         trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
 657         trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
 658
 659         info.gi_sb = sb;
 660         info.gi_data = arg;
 661         error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
 662         if (error == EXT4_QUERY_RANGE_ABORT)
 663                 aborted = true;
 664         else if (error)
 665                 return error;
 666
 667         /* If we didn't abort, set the "last" flag in the last fmx */
 668         if (!aborted && info.gi_idx) {
 669                 info.gi_last_flags |= FMR_OF_LAST;
 670                 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
 671                                  &info.gi_last_flags,
 672                                  sizeof(info.gi_last_flags)))
 673                         return -EFAULT;
 674         }
 675
 676         /* copy back header */
 677         head.fmh_entries = xhead.fmh_entries;
 678         head.fmh_oflags = xhead.fmh_oflags;
 679         if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
 680                 return -EFAULT;
 681
 682         return 0;
 683 }
 684
 685 static long ext4_ioctl_group_add(struct file *file,
 686                                  struct ext4_new_group_data *input)
 687 {
 688         struct super_block *sb = file_inode(file)->i_sb;
 689         int err, err2=0;
 690
 691         err = ext4_resize_begin(sb);
 692         if (err)
 693                 return err;
 694
 695         if (ext4_has_feature_bigalloc(sb)) {
 696                 ext4_msg(sb, KERN_ERR,
 697                          "Online resizing not supported with bigalloc");
 698                 err = -EOPNOTSUPP;
 699                 goto group_add_out;
 700         }
 701
 702         err = mnt_want_write_file(file);
 703         if (err)
 704                 goto group_add_out;
 705
 706         err = ext4_group_add(sb, input);
 707         if (EXT4_SB(sb)->s_journal) {
 708                 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
 709                 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
 710                 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
 711         }
 712         if (err == 0)
 713                 err = err2;
 714         mnt_drop_write_file(file);
 715         if (!err && ext4_has_group_desc_csum(sb) &&
 716             test_opt(sb, INIT_INODE_TABLE))
 717                 err = ext4_register_li_request(sb, input->group);
 718 group_add_out:
 719         ext4_resize_end(sb);
 720         return err;
 721 }
 722
 723 int ext4_fileattr_get(struct dentry *dentry, struct fileattr *fa)
 724 {
 725         struct inode *inode = d_inode(dentry);
 726         struct ext4_inode_info *ei = EXT4_I(inode);
 727         u32 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
 728
 729         if (S_ISREG(inode->i_mode))
 730                 flags &= ~FS_PROJINHERIT_FL;
 731
 732         fileattr_fill_flags(fa, flags);
 733         if (ext4_has_feature_project(inode->i_sb))
 734                 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
 735
 736         return 0;
 737 }
 738
 739 int ext4_fileattr_set(struct user_namespace *mnt_userns,
 740                       struct dentry *dentry, struct fileattr *fa)
 741 {
 742         struct inode *inode = d_inode(dentry);
 743         u32 flags = fa->flags;
 744         int err = -EOPNOTSUPP;
 745
 746         ext4_fc_start_update(inode);
 747         if (flags & ~EXT4_FL_USER_VISIBLE)
 748                 goto out;
 749
 750         /*
 751          * chattr(1) grabs flags via GETFLAGS, modifies the result and
 752          * passes that to SETFLAGS. So we cannot easily make SETFLAGS
 753          * more restrictive than just silently masking off visible but
 754          * not settable flags as we always did.
 755          */
 756         flags &= EXT4_FL_USER_MODIFIABLE;
 757         if (ext4_mask_flags(inode->i_mode, flags) != flags)
 758                 goto out;
 759         err = ext4_ioctl_check_immutable(inode, fa->fsx_projid, flags);
 760         if (err)
 761                 goto out;
 762         err = ext4_ioctl_setflags(inode, flags);
 763         if (err)
 764                 goto out;
 765         err = ext4_ioctl_setproject(inode, fa->fsx_projid);
 766 out:
 767         ext4_fc_stop_update(inode);
 768         return err;
 769 }
 770
 771 /* So that the fiemap access checks can't overflow on 32 bit machines. */
 772 #define FIEMAP_MAX_EXTENTS      (UINT_MAX / sizeof(struct fiemap_extent))
 773
 774 static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
 775 {
 776         struct fiemap fiemap;
 777         struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
 778         struct fiemap_extent_info fieinfo = { 0, };
 779         struct inode *inode = file_inode(filp);
 780         int error;
 781
 782         if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
 783                 return -EFAULT;
 784
 785         if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
 786                 return -EINVAL;
 787
 788         fieinfo.fi_flags = fiemap.fm_flags;
 789         fieinfo.fi_extents_max = fiemap.fm_extent_count;
 790         fieinfo.fi_extents_start = ufiemap->fm_extents;
 791
 792         error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
 793                         fiemap.fm_length);
 794         fiemap.fm_flags = fieinfo.fi_flags;
 795         fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
 796         if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
 797                 error = -EFAULT;
 798
 799         return error;
 800 }
 801
 802 static int ext4_ioctl_checkpoint(struct file *filp, unsigned long arg)
 803 {
 804         int err = 0;
 805         __u32 flags = 0;
 806         unsigned int flush_flags = 0;
 807         struct super_block *sb = file_inode(filp)->i_sb;
 808         struct request_queue *q;
 809
 810         if (copy_from_user(&flags, (__u32 __user *)arg,
 811                                 sizeof(__u32)))
 812                 return -EFAULT;
 813
 814         if (!capable(CAP_SYS_ADMIN))
 815                 return -EPERM;
 816
 817         /* check for invalid bits set */
 818         if ((flags & ~EXT4_IOC_CHECKPOINT_FLAG_VALID) ||
 819                                 ((flags & JBD2_JOURNAL_FLUSH_DISCARD) &&
 820                                 (flags & JBD2_JOURNAL_FLUSH_ZEROOUT)))
 821                 return -EINVAL;
 822
 823         if (!EXT4_SB(sb)->s_journal)
 824                 return -ENODEV;
 825
 826         if (flags & ~EXT4_IOC_CHECKPOINT_FLAG_VALID)
 827                 return -EINVAL;
 828
 829         q = bdev_get_queue(EXT4_SB(sb)->s_journal->j_dev);
 830         if (!q)
 831                 return -ENXIO;
 832         if ((flags & JBD2_JOURNAL_FLUSH_DISCARD) && !blk_queue_discard(q))
 833                 return -EOPNOTSUPP;
 834
 835         if (flags & EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN)
 836                 return 0;
 837
 838         if (flags & EXT4_IOC_CHECKPOINT_FLAG_DISCARD)
 839                 flush_flags |= JBD2_JOURNAL_FLUSH_DISCARD;
 840
 841         if (flags & EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT) {
 842                 flush_flags |= JBD2_JOURNAL_FLUSH_ZEROOUT;
 843                 pr_info_ratelimited("warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow");
 844         }
 845
 846         jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
 847         err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, flush_flags);
 848         jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
 849
 850         return err;
 851 }
 852
 853 static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 854 {
 855         struct inode *inode = file_inode(filp);
 856         struct super_block *sb = inode->i_sb;
 857         struct user_namespace *mnt_userns = file_mnt_user_ns(filp);
 858
 859         ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
 860
 861         switch (cmd) {
 862         case FS_IOC_GETFSMAP:
 863                 return ext4_ioc_getfsmap(sb, (void __user *)arg);
 864         case EXT4_IOC_GETVERSION:
 865         case EXT4_IOC_GETVERSION_OLD:
 866                 return put_user(inode->i_generation, (int __user *) arg);
 867         case EXT4_IOC_SETVERSION:
 868         case EXT4_IOC_SETVERSION_OLD: {
 869                 handle_t *handle;
 870                 struct ext4_iloc iloc;
 871                 __u32 generation;
 872                 int err;
 873
 874                 if (!inode_owner_or_capable(mnt_userns, inode))
 875                         return -EPERM;
 876
 877                 if (ext4_has_metadata_csum(inode->i_sb)) {
 878                         ext4_warning(sb, "Setting inode version is not "
 879                                      "supported with metadata_csum enabled.");
 880                         return -ENOTTY;
 881                 }
 882
 883                 err = mnt_want_write_file(filp);
 884                 if (err)
 885                         return err;
 886                 if (get_user(generation, (int __user *) arg)) {
 887                         err = -EFAULT;
 888                         goto setversion_out;
 889                 }
 890
 891                 inode_lock(inode);
 892                 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
 893                 if (IS_ERR(handle)) {
 894                         err = PTR_ERR(handle);
 895                         goto unlock_out;
 896                 }
 897                 err = ext4_reserve_inode_write(handle, inode, &iloc);
 898                 if (err == 0) {
 899                         inode->i_ctime = current_time(inode);
 900                         inode->i_generation = generation;
 901                         err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 902                 }
 903                 ext4_journal_stop(handle);
 904
 905 unlock_out:
 906                 inode_unlock(inode);
 907 setversion_out:
 908                 mnt_drop_write_file(filp);
 909                 return err;
 910         }
 911         case EXT4_IOC_GROUP_EXTEND: {
 912                 ext4_fsblk_t n_blocks_count;
 913                 int err, err2=0;
 914
 915                 err = ext4_resize_begin(sb);
 916                 if (err)
 917                         return err;
 918
 919                 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
 920                         err = -EFAULT;
 921                         goto group_extend_out;
 922                 }
 923
 924                 if (ext4_has_feature_bigalloc(sb)) {
 925                         ext4_msg(sb, KERN_ERR,
 926                                  "Online resizing not supported with bigalloc");
 927                         err = -EOPNOTSUPP;
 928                         goto group_extend_out;
 929                 }
 930
 931                 err = mnt_want_write_file(filp);
 932                 if (err)
 933                         goto group_extend_out;
 934
 935                 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
 936                 if (EXT4_SB(sb)->s_journal) {
 937                         jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
 938                         err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
 939                         jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
 940                 }
 941                 if (err == 0)
 942                         err = err2;
 943                 mnt_drop_write_file(filp);
 944 group_extend_out:
 945                 ext4_resize_end(sb);
 946                 return err;
 947         }
 948
 949         case EXT4_IOC_MOVE_EXT: {
 950                 struct move_extent me;
 951                 struct fd donor;
 952                 int err;
 953
 954                 if (!(filp->f_mode & FMODE_READ) ||
 955                     !(filp->f_mode & FMODE_WRITE))
 956                         return -EBADF;
 957
 958                 if (copy_from_user(&me,
 959                         (struct move_extent __user *)arg, sizeof(me)))
 960                         return -EFAULT;
 961                 me.moved_len = 0;
 962
 963                 donor = fdget(me.donor_fd);
 964                 if (!donor.file)
 965                         return -EBADF;
 966
 967                 if (!(donor.file->f_mode & FMODE_WRITE)) {
 968                         err = -EBADF;
 969                         goto mext_out;
 970                 }
 971
 972                 if (ext4_has_feature_bigalloc(sb)) {
 973                         ext4_msg(sb, KERN_ERR,
 974                                  "Online defrag not supported with bigalloc");
 975                         err = -EOPNOTSUPP;
 976                         goto mext_out;
 977                 } else if (IS_DAX(inode)) {
 978                         ext4_msg(sb, KERN_ERR,
 979                                  "Online defrag not supported with DAX");
 980                         err = -EOPNOTSUPP;
 981                         goto mext_out;
 982                 }
 983
 984                 err = mnt_want_write_file(filp);
 985                 if (err)
 986                         goto mext_out;
 987
 988                 err = ext4_move_extents(filp, donor.file, me.orig_start,
 989                                         me.donor_start, me.len, &me.moved_len);
 990                 mnt_drop_write_file(filp);
 991
 992                 if (copy_to_user((struct move_extent __user *)arg,
 993                                  &me, sizeof(me)))
 994                         err = -EFAULT;
 995 mext_out:
 996                 fdput(donor);
 997                 return err;
 998         }
 999
1000         case EXT4_IOC_GROUP_ADD: {
1001                 struct ext4_new_group_data input;
1002
1003                 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
1004                                 sizeof(input)))
1005                         return -EFAULT;
1006
1007                 return ext4_ioctl_group_add(filp, &input);
1008         }
1009
1010         case EXT4_IOC_MIGRATE:
1011         {
1012                 int err;
1013                 if (!inode_owner_or_capable(mnt_userns, inode))
1014                         return -EACCES;
1015
1016                 err = mnt_want_write_file(filp);
1017                 if (err)
1018                         return err;
1019                 /*
1020                  * inode_mutex prevent write and truncate on the file.
1021                  * Read still goes through. We take i_data_sem in
1022                  * ext4_ext_swap_inode_data before we switch the
1023                  * inode format to prevent read.
1024                  */
1025                 inode_lock((inode));
1026                 err = ext4_ext_migrate(inode);
1027                 inode_unlock((inode));
1028                 mnt_drop_write_file(filp);
1029                 return err;
1030         }
1031
1032         case EXT4_IOC_ALLOC_DA_BLKS:
1033         {
1034                 int err;
1035                 if (!inode_owner_or_capable(mnt_userns, inode))
1036                         return -EACCES;
1037
1038                 err = mnt_want_write_file(filp);
1039                 if (err)
1040                         return err;
1041                 err = ext4_alloc_da_blocks(inode);
1042                 mnt_drop_write_file(filp);
1043                 return err;
1044         }
1045
1046         case EXT4_IOC_SWAP_BOOT:
1047         {
1048                 int err;
1049                 if (!(filp->f_mode & FMODE_WRITE))
1050                         return -EBADF;
1051                 err = mnt_want_write_file(filp);
1052                 if (err)
1053                         return err;
1054                 err = swap_inode_boot_loader(sb, mnt_userns, inode);
1055                 mnt_drop_write_file(filp);
1056                 return err;
1057         }
1058
1059         case EXT4_IOC_RESIZE_FS: {
1060                 ext4_fsblk_t n_blocks_count;
1061                 int err = 0, err2 = 0;
1062                 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
1063
1064                 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
1065                                    sizeof(__u64))) {
1066                         return -EFAULT;
1067                 }
1068
1069                 err = ext4_resize_begin(sb);
1070                 if (err)
1071                         return err;
1072
1073                 err = mnt_want_write_file(filp);
1074                 if (err)
1075                         goto resizefs_out;
1076
1077                 err = ext4_resize_fs(sb, n_blocks_count);
1078                 if (EXT4_SB(sb)->s_journal) {
1079                         ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE);
1080                         jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1081                         err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
1082                         jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1083                 }
1084                 if (err == 0)
1085                         err = err2;
1086                 mnt_drop_write_file(filp);
1087                 if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
1088                     ext4_has_group_desc_csum(sb) &&
1089                     test_opt(sb, INIT_INODE_TABLE))
1090                         err = ext4_register_li_request(sb, o_group);
1091
1092 resizefs_out:
1093                 ext4_resize_end(sb);
1094                 return err;
1095         }
1096
1097         case FITRIM:
1098         {
1099                 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1100                 struct fstrim_range range;
1101                 int ret = 0;
1102
1103                 if (!capable(CAP_SYS_ADMIN))
1104                         return -EPERM;
1105
1106                 if (!blk_queue_discard(q))
1107                         return -EOPNOTSUPP;
1108
1109                 /*
1110                  * We haven't replayed the journal, so we cannot use our
1111                  * block-bitmap-guided storage zapping commands.
1112                  */
1113                 if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
1114                         return -EROFS;
1115
1116                 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1117                     sizeof(range)))
1118                         return -EFAULT;
1119
1120                 range.minlen = max((unsigned int)range.minlen,
1121                                    q->limits.discard_granularity);
1122                 ret = ext4_trim_fs(sb, &range);
1123                 if (ret < 0)
1124                         return ret;
1125
1126                 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1127                     sizeof(range)))
1128                         return -EFAULT;
1129
1130                 return 0;
1131         }
1132         case EXT4_IOC_PRECACHE_EXTENTS:
1133                 return ext4_ext_precache(inode);
1134
1135         case FS_IOC_SET_ENCRYPTION_POLICY:
1136                 if (!ext4_has_feature_encrypt(sb))
1137                         return -EOPNOTSUPP;
1138                 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
1139
1140         case FS_IOC_GET_ENCRYPTION_PWSALT: {
1141 #ifdef CONFIG_FS_ENCRYPTION
1142                 int err, err2;
1143                 struct ext4_sb_info *sbi = EXT4_SB(sb);
1144                 handle_t *handle;
1145
1146                 if (!ext4_has_feature_encrypt(sb))
1147                         return -EOPNOTSUPP;
1148                 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
1149                         err = mnt_want_write_file(filp);
1150                         if (err)
1151                                 return err;
1152                         handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
1153                         if (IS_ERR(handle)) {
1154                                 err = PTR_ERR(handle);
1155                                 goto pwsalt_err_exit;
1156                         }
1157                         err = ext4_journal_get_write_access(handle, sb,
1158                                                             sbi->s_sbh,
1159                                                             EXT4_JTR_NONE);
1160                         if (err)
1161                                 goto pwsalt_err_journal;
1162                         lock_buffer(sbi->s_sbh);
1163                         generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
1164                         ext4_superblock_csum_set(sb);
1165                         unlock_buffer(sbi->s_sbh);
1166                         err = ext4_handle_dirty_metadata(handle, NULL,
1167                                                          sbi->s_sbh);
1168                 pwsalt_err_journal:
1169                         err2 = ext4_journal_stop(handle);
1170                         if (err2 && !err)
1171                                 err = err2;
1172                 pwsalt_err_exit:
1173                         mnt_drop_write_file(filp);
1174                         if (err)
1175                                 return err;
1176                 }
1177                 if (copy_to_user((void __user *) arg,
1178                                  sbi->s_es->s_encrypt_pw_salt, 16))
1179                         return -EFAULT;
1180                 return 0;
1181 #else
1182                 return -EOPNOTSUPP;
1183 #endif
1184         }
1185         case FS_IOC_GET_ENCRYPTION_POLICY:
1186                 if (!ext4_has_feature_encrypt(sb))
1187                         return -EOPNOTSUPP;
1188                 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1189
1190         case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1191                 if (!ext4_has_feature_encrypt(sb))
1192                         return -EOPNOTSUPP;
1193                 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1194
1195         case FS_IOC_ADD_ENCRYPTION_KEY:
1196                 if (!ext4_has_feature_encrypt(sb))
1197                         return -EOPNOTSUPP;
1198                 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1199
1200         case FS_IOC_REMOVE_ENCRYPTION_KEY:
1201                 if (!ext4_has_feature_encrypt(sb))
1202                         return -EOPNOTSUPP;
1203                 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1204
1205         case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1206                 if (!ext4_has_feature_encrypt(sb))
1207                         return -EOPNOTSUPP;
1208                 return fscrypt_ioctl_remove_key_all_users(filp,
1209                                                           (void __user *)arg);
1210         case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1211                 if (!ext4_has_feature_encrypt(sb))
1212                         return -EOPNOTSUPP;
1213                 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1214
1215         case FS_IOC_GET_ENCRYPTION_NONCE:
1216                 if (!ext4_has_feature_encrypt(sb))
1217                         return -EOPNOTSUPP;
1218                 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
1219
1220         case EXT4_IOC_CLEAR_ES_CACHE:
1221         {
1222                 if (!inode_owner_or_capable(mnt_userns, inode))
1223                         return -EACCES;
1224                 ext4_clear_inode_es(inode);
1225                 return 0;
1226         }
1227
1228         case EXT4_IOC_GETSTATE:
1229         {
1230                 __u32   state = 0;
1231
1232                 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1233                         state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1234                 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1235                         state |= EXT4_STATE_FLAG_NEW;
1236                 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1237                         state |= EXT4_STATE_FLAG_NEWENTRY;
1238                 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1239                         state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1240
1241                 return put_user(state, (__u32 __user *) arg);
1242         }
1243
1244         case EXT4_IOC_GET_ES_CACHE:
1245                 return ext4_ioctl_get_es_cache(filp, arg);
1246
1247         case EXT4_IOC_SHUTDOWN:
1248                 return ext4_shutdown(sb, arg);
1249
1250         case FS_IOC_ENABLE_VERITY:
1251                 if (!ext4_has_feature_verity(sb))
1252                         return -EOPNOTSUPP;
1253                 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1254
1255         case FS_IOC_MEASURE_VERITY:
1256                 if (!ext4_has_feature_verity(sb))
1257                         return -EOPNOTSUPP;
1258                 return fsverity_ioctl_measure(filp, (void __user *)arg);
1259
1260         case FS_IOC_READ_VERITY_METADATA:
1261                 if (!ext4_has_feature_verity(sb))
1262                         return -EOPNOTSUPP;
1263                 return fsverity_ioctl_read_metadata(filp,
1264                                                     (const void __user *)arg);
1265
1266         case EXT4_IOC_CHECKPOINT:
1267                 return ext4_ioctl_checkpoint(filp, arg);
1268
1269         default:
1270                 return -ENOTTY;
1271         }
1272 }
1273
1274 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1275 {
1276         long ret;
1277
1278         ext4_fc_start_update(file_inode(filp));
1279         ret = __ext4_ioctl(filp, cmd, arg);
1280         ext4_fc_stop_update(file_inode(filp));
1281
1282         return ret;
1283 }
1284
1285 #ifdef CONFIG_COMPAT
1286 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1287 {
1288         /* These are just misnamed, they actually get/put from/to user an int */
1289         switch (cmd) {
1290         case EXT4_IOC32_GETVERSION:
1291                 cmd = EXT4_IOC_GETVERSION;
1292                 break;
1293         case EXT4_IOC32_SETVERSION:
1294                 cmd = EXT4_IOC_SETVERSION;
1295                 break;
1296         case EXT4_IOC32_GROUP_EXTEND:
1297                 cmd = EXT4_IOC_GROUP_EXTEND;
1298                 break;
1299         case EXT4_IOC32_GETVERSION_OLD:
1300                 cmd = EXT4_IOC_GETVERSION_OLD;
1301                 break;
1302         case EXT4_IOC32_SETVERSION_OLD:
1303                 cmd = EXT4_IOC_SETVERSION_OLD;
1304                 break;
1305         case EXT4_IOC32_GETRSVSZ:
1306                 cmd = EXT4_IOC_GETRSVSZ;
1307                 break;
1308         case EXT4_IOC32_SETRSVSZ:
1309                 cmd = EXT4_IOC_SETRSVSZ;
1310                 break;
1311         case EXT4_IOC32_GROUP_ADD: {
1312                 struct compat_ext4_new_group_input __user *uinput;
1313                 struct ext4_new_group_data input;
1314                 int err;
1315
1316                 uinput = compat_ptr(arg);
1317                 err = get_user(input.group, &uinput->group);
1318                 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1319                 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1320                 err |= get_user(input.inode_table, &uinput->inode_table);
1321                 err |= get_user(input.blocks_count, &uinput->blocks_count);
1322                 err |= get_user(input.reserved_blocks,
1323                                 &uinput->reserved_blocks);
1324                 if (err)
1325                         return -EFAULT;
1326                 return ext4_ioctl_group_add(file, &input);
1327         }
1328         case EXT4_IOC_MOVE_EXT:
1329         case EXT4_IOC_RESIZE_FS:
1330         case FITRIM:
1331         case EXT4_IOC_PRECACHE_EXTENTS:
1332         case FS_IOC_SET_ENCRYPTION_POLICY:
1333         case FS_IOC_GET_ENCRYPTION_PWSALT:
1334         case FS_IOC_GET_ENCRYPTION_POLICY:
1335         case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1336         case FS_IOC_ADD_ENCRYPTION_KEY:
1337         case FS_IOC_REMOVE_ENCRYPTION_KEY:
1338         case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1339         case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1340         case FS_IOC_GET_ENCRYPTION_NONCE:
1341         case EXT4_IOC_SHUTDOWN:
1342         case FS_IOC_GETFSMAP:
1343         case FS_IOC_ENABLE_VERITY:
1344         case FS_IOC_MEASURE_VERITY:
1345         case FS_IOC_READ_VERITY_METADATA:
1346         case EXT4_IOC_CLEAR_ES_CACHE:
1347         case EXT4_IOC_GETSTATE:
1348         case EXT4_IOC_GET_ES_CACHE:
1349         case EXT4_IOC_CHECKPOINT:
1350                 break;
1351         default:
1352                 return -ENOIOCTLCMD;
1353         }
1354         return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1355 }
1356 #endif