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 "ext4_jbd2.h"
  24 #include "ext4.h"
  25 #include <linux/fsmap.h>
  26 #include "fsmap.h"
  27 #include <trace/events/ext4.h>
  28
  29 /**
  30  * Swap memory between @a and @b for @len bytes.
  31  *
  32  * @a:          pointer to first memory area
  33  * @b:          pointer to second memory area
  34  * @len:        number of bytes to swap
  35  *
  36  */
  37 static void memswap(void *a, void *b, size_t len)
  38 {
  39         unsigned char *ap, *bp;
  40
  41         ap = (unsigned char *)a;
  42         bp = (unsigned char *)b;
  43         while (len-- > 0) {
  44                 swap(*ap, *bp);
  45                 ap++;
  46                 bp++;
  47         }
  48 }
  49
  50 /**
  51  * Swap i_data and associated attributes between @inode1 and @inode2.
  52  * This function is used for the primary swap between inode1 and inode2
  53  * and also to revert this primary swap in case of errors.
  54  *
  55  * Therefore you have to make sure, that calling this method twice
  56  * will revert all changes.
  57  *
  58  * @inode1:     pointer to first inode
  59  * @inode2:     pointer to second inode
  60  */
  61 static void swap_inode_data(struct inode *inode1, struct inode *inode2)
  62 {
  63         loff_t isize;
  64         struct ext4_inode_info *ei1;
  65         struct ext4_inode_info *ei2;
  66         unsigned long tmp;
  67
  68         ei1 = EXT4_I(inode1);
  69         ei2 = EXT4_I(inode2);
  70
  71         swap(inode1->i_version, inode2->i_version);
  72         swap(inode1->i_atime, inode2->i_atime);
  73         swap(inode1->i_mtime, inode2->i_mtime);
  74
  75         memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
  76         tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP;
  77         ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) |
  78                 (ei1->i_flags & ~EXT4_FL_SHOULD_SWAP);
  79         ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP);
  80         swap(ei1->i_disksize, ei2->i_disksize);
  81         ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
  82         ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
  83
  84         isize = i_size_read(inode1);
  85         i_size_write(inode1, i_size_read(inode2));
  86         i_size_write(inode2, isize);
  87 }
  88
  89 void ext4_reset_inode_seed(struct inode *inode)
  90 {
  91         struct ext4_inode_info *ei = EXT4_I(inode);
  92         struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
  93         __le32 inum = cpu_to_le32(inode->i_ino);
  94         __le32 gen = cpu_to_le32(inode->i_generation);
  95         __u32 csum;
  96
  97         if (!ext4_has_metadata_csum(inode->i_sb))
  98                 return;
  99
 100         csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum));
 101         ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen));
 102 }
 103
 104 /**
 105  * Swap the information from the given @inode and the inode
 106  * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
 107  * important fields of the inodes.
 108  *
 109  * @sb:         the super block of the filesystem
 110  * @inode:      the inode to swap with EXT4_BOOT_LOADER_INO
 111  *
 112  */
 113 static long swap_inode_boot_loader(struct super_block *sb,
 114                                 struct inode *inode)
 115 {
 116         handle_t *handle;
 117         int err;
 118         struct inode *inode_bl;
 119         struct ext4_inode_info *ei_bl;
 120         qsize_t size, size_bl, diff;
 121         blkcnt_t blocks;
 122         unsigned short bytes;
 123
 124         inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO, EXT4_IGET_SPECIAL);
 125         if (IS_ERR(inode_bl))
 126                 return PTR_ERR(inode_bl);
 127         ei_bl = EXT4_I(inode_bl);
 128
 129         /* Protect orig inodes against a truncate and make sure,
 130          * that only 1 swap_inode_boot_loader is running. */
 131         lock_two_nondirectories(inode, inode_bl);
 132
 133         if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
 134             IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
 135             (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
 136             ext4_has_inline_data(inode)) {
 137                 err = -EINVAL;
 138                 goto journal_err_out;
 139         }
 140
 141         if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
 142             !inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) {
 143                 err = -EPERM;
 144                 goto journal_err_out;
 145         }
 146
 147         down_write(&EXT4_I(inode)->i_mmap_sem);
 148         err = filemap_write_and_wait(inode->i_mapping);
 149         if (err)
 150                 goto err_out;
 151
 152         err = filemap_write_and_wait(inode_bl->i_mapping);
 153         if (err)
 154                 goto err_out;
 155
 156         /* Wait for all existing dio workers */
 157         inode_dio_wait(inode);
 158         inode_dio_wait(inode_bl);
 159
 160         truncate_inode_pages(&inode->i_data, 0);
 161         truncate_inode_pages(&inode_bl->i_data, 0);
 162
 163         handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
 164         if (IS_ERR(handle)) {
 165                 err = -EINVAL;
 166                 goto err_out;
 167         }
 168         ext4_fc_start_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT);
 169
 170         /* Protect extent tree against block allocations via delalloc */
 171         ext4_double_down_write_data_sem(inode, inode_bl);
 172
 173         if (inode_bl->i_nlink == 0) {
 174                 /* this inode has never been used as a BOOT_LOADER */
 175                 set_nlink(inode_bl, 1);
 176                 i_uid_write(inode_bl, 0);
 177                 i_gid_write(inode_bl, 0);
 178                 inode_bl->i_flags = 0;
 179                 ei_bl->i_flags = 0;
 180                 inode_set_iversion(inode_bl, 1);
 181                 i_size_write(inode_bl, 0);
 182                 inode_bl->i_mode = S_IFREG;
 183                 if (ext4_has_feature_extents(sb)) {
 184                         ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
 185                         ext4_ext_tree_init(handle, inode_bl);
 186                 } else
 187                         memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
 188         }
 189
 190         err = dquot_initialize(inode);
 191         if (err)
 192                 goto err_out1;
 193
 194         size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
 195         size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
 196         diff = size - size_bl;
 197         swap_inode_data(inode, inode_bl);
 198
 199         inode->i_ctime = inode_bl->i_ctime = current_time(inode);
 200
 201         inode->i_generation = prandom_u32();
 202         inode_bl->i_generation = prandom_u32();
 203         ext4_reset_inode_seed(inode);
 204         ext4_reset_inode_seed(inode_bl);
 205
 206         ext4_discard_preallocations(inode, 0);
 207
 208         err = ext4_mark_inode_dirty(handle, inode);
 209         if (err < 0) {
 210                 /* No need to update quota information. */
 211                 ext4_warning(inode->i_sb,
 212                         "couldn't mark inode #%lu dirty (err %d)",
 213                         inode->i_ino, err);
 214                 /* Revert all changes: */
 215                 swap_inode_data(inode, inode_bl);
 216                 ext4_mark_inode_dirty(handle, inode);
 217                 goto err_out1;
 218         }
 219
 220         blocks = inode_bl->i_blocks;
 221         bytes = inode_bl->i_bytes;
 222         inode_bl->i_blocks = inode->i_blocks;
 223         inode_bl->i_bytes = inode->i_bytes;
 224         err = ext4_mark_inode_dirty(handle, inode_bl);
 225         if (err < 0) {
 226                 /* No need to update quota information. */
 227                 ext4_warning(inode_bl->i_sb,
 228                         "couldn't mark inode #%lu dirty (err %d)",
 229                         inode_bl->i_ino, err);
 230                 goto revert;
 231         }
 232
 233         /* Bootloader inode should not be counted into quota information. */
 234         if (diff > 0)
 235                 dquot_free_space(inode, diff);
 236         else
 237                 err = dquot_alloc_space(inode, -1 * diff);
 238
 239         if (err < 0) {
 240 revert:
 241                 /* Revert all changes: */
 242                 inode_bl->i_blocks = blocks;
 243                 inode_bl->i_bytes = bytes;
 244                 swap_inode_data(inode, inode_bl);
 245                 ext4_mark_inode_dirty(handle, inode);
 246                 ext4_mark_inode_dirty(handle, inode_bl);
 247         }
 248
 249 err_out1:
 250         ext4_journal_stop(handle);
 251         ext4_fc_stop_ineligible(sb);
 252         ext4_double_up_write_data_sem(inode, inode_bl);
 253
 254 err_out:
 255         up_write(&EXT4_I(inode)->i_mmap_sem);
 256 journal_err_out:
 257         unlock_two_nondirectories(inode, inode_bl);
 258         iput(inode_bl);
 259         return err;
 260 }
 261
 262 #ifdef CONFIG_FS_ENCRYPTION
 263 static int uuid_is_zero(__u8 u[16])
 264 {
 265         int     i;
 266
 267         for (i = 0; i < 16; i++)
 268                 if (u[i])
 269                         return 0;
 270         return 1;
 271 }
 272 #endif
 273
 274 /*
 275  * If immutable is set and we are not clearing it, we're not allowed to change
 276  * anything else in the inode.  Don't error out if we're only trying to set
 277  * immutable on an immutable file.
 278  */
 279 static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
 280                                       unsigned int flags)
 281 {
 282         struct ext4_inode_info *ei = EXT4_I(inode);
 283         unsigned int oldflags = ei->i_flags;
 284
 285         if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
 286                 return 0;
 287
 288         if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
 289                 return -EPERM;
 290         if (ext4_has_feature_project(inode->i_sb) &&
 291             __kprojid_val(ei->i_projid) != new_projid)
 292                 return -EPERM;
 293
 294         return 0;
 295 }
 296
 297 static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
 298 {
 299         struct ext4_inode_info *ei = EXT4_I(inode);
 300
 301         if (S_ISDIR(inode->i_mode))
 302                 return;
 303
 304         if (test_opt2(inode->i_sb, DAX_NEVER) ||
 305             test_opt(inode->i_sb, DAX_ALWAYS))
 306                 return;
 307
 308         if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
 309                 d_mark_dontcache(inode);
 310 }
 311
 312 static bool dax_compatible(struct inode *inode, unsigned int oldflags,
 313                            unsigned int flags)
 314 {
 315         if (flags & EXT4_DAX_FL) {
 316                 if ((oldflags & EXT4_DAX_MUT_EXCL) ||
 317                      ext4_test_inode_state(inode,
 318                                           EXT4_STATE_VERITY_IN_PROGRESS)) {
 319                         return false;
 320                 }
 321         }
 322
 323         if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
 324                         return false;
 325
 326         return true;
 327 }
 328
 329 static int ext4_ioctl_setflags(struct inode *inode,
 330                                unsigned int flags)
 331 {
 332         struct ext4_inode_info *ei = EXT4_I(inode);
 333         handle_t *handle = NULL;
 334         int err = -EPERM, migrate = 0;
 335         struct ext4_iloc iloc;
 336         unsigned int oldflags, mask, i;
 337         struct super_block *sb = inode->i_sb;
 338
 339         /* Is it quota file? Do not allow user to mess with it */
 340         if (ext4_is_quota_file(inode))
 341                 goto flags_out;
 342
 343         oldflags = ei->i_flags;
 344
 345         err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
 346         if (err)
 347                 goto flags_out;
 348
 349         /*
 350          * The JOURNAL_DATA flag can only be changed by
 351          * the relevant capability.
 352          */
 353         if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
 354                 if (!capable(CAP_SYS_RESOURCE))
 355                         goto flags_out;
 356         }
 357
 358         if (!dax_compatible(inode, oldflags, flags)) {
 359                 err = -EOPNOTSUPP;
 360                 goto flags_out;
 361         }
 362
 363         if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
 364                 migrate = 1;
 365
 366         if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
 367                 if (!ext4_has_feature_casefold(sb)) {
 368                         err = -EOPNOTSUPP;
 369                         goto flags_out;
 370                 }
 371
 372                 if (!S_ISDIR(inode->i_mode)) {
 373                         err = -ENOTDIR;
 374                         goto flags_out;
 375                 }
 376
 377                 if (!ext4_empty_dir(inode)) {
 378                         err = -ENOTEMPTY;
 379                         goto flags_out;
 380                 }
 381         }
 382
 383         /*
 384          * Wait for all pending directio and then flush all the dirty pages
 385          * for this file.  The flush marks all the pages readonly, so any
 386          * subsequent attempt to write to the file (particularly mmap pages)
 387          * will come through the filesystem and fail.
 388          */
 389         if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
 390             (flags & EXT4_IMMUTABLE_FL)) {
 391                 inode_dio_wait(inode);
 392                 err = filemap_write_and_wait(inode->i_mapping);
 393                 if (err)
 394                         goto flags_out;
 395         }
 396
 397         handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
 398         if (IS_ERR(handle)) {
 399                 err = PTR_ERR(handle);
 400                 goto flags_out;
 401         }
 402         if (IS_SYNC(inode))
 403                 ext4_handle_sync(handle);
 404         err = ext4_reserve_inode_write(handle, inode, &iloc);
 405         if (err)
 406                 goto flags_err;
 407
 408         ext4_dax_dontcache(inode, flags);
 409
 410         for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
 411                 if (!(mask & EXT4_FL_USER_MODIFIABLE))
 412                         continue;
 413                 /* These flags get special treatment later */
 414                 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
 415                         continue;
 416                 if (mask & flags)
 417                         ext4_set_inode_flag(inode, i);
 418                 else
 419                         ext4_clear_inode_flag(inode, i);
 420         }
 421
 422         ext4_set_inode_flags(inode, false);
 423
 424         inode->i_ctime = current_time(inode);
 425
 426         err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 427 flags_err:
 428         ext4_journal_stop(handle);
 429         if (err)
 430                 goto flags_out;
 431
 432         if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
 433                 /*
 434                  * Changes to the journaling mode can cause unsafe changes to
 435                  * S_DAX if the inode is DAX
 436                  */
 437                 if (IS_DAX(inode)) {
 438                         err = -EBUSY;
 439                         goto flags_out;
 440                 }
 441
 442                 err = ext4_change_inode_journal_flag(inode,
 443                                                      flags & EXT4_JOURNAL_DATA_FL);
 444                 if (err)
 445                         goto flags_out;
 446         }
 447         if (migrate) {
 448                 if (flags & EXT4_EXTENTS_FL)
 449                         err = ext4_ext_migrate(inode);
 450                 else
 451                         err = ext4_ind_migrate(inode);
 452         }
 453
 454 flags_out:
 455         return err;
 456 }
 457
 458 #ifdef CONFIG_QUOTA
 459 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
 460 {
 461         struct inode *inode = file_inode(filp);
 462         struct super_block *sb = inode->i_sb;
 463         struct ext4_inode_info *ei = EXT4_I(inode);
 464         int err, rc;
 465         handle_t *handle;
 466         kprojid_t kprojid;
 467         struct ext4_iloc iloc;
 468         struct ext4_inode *raw_inode;
 469         struct dquot *transfer_to[MAXQUOTAS] = { };
 470
 471         if (!ext4_has_feature_project(sb)) {
 472                 if (projid != EXT4_DEF_PROJID)
 473                         return -EOPNOTSUPP;
 474                 else
 475                         return 0;
 476         }
 477
 478         if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
 479                 return -EOPNOTSUPP;
 480
 481         kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
 482
 483         if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
 484                 return 0;
 485
 486         err = -EPERM;
 487         /* Is it quota file? Do not allow user to mess with it */
 488         if (ext4_is_quota_file(inode))
 489                 return err;
 490
 491         err = ext4_get_inode_loc(inode, &iloc);
 492         if (err)
 493                 return err;
 494
 495         raw_inode = ext4_raw_inode(&iloc);
 496         if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
 497                 err = ext4_expand_extra_isize(inode,
 498                                               EXT4_SB(sb)->s_want_extra_isize,
 499                                               &iloc);
 500                 if (err)
 501                         return err;
 502         } else {
 503                 brelse(iloc.bh);
 504         }
 505
 506         err = dquot_initialize(inode);
 507         if (err)
 508                 return err;
 509
 510         handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
 511                 EXT4_QUOTA_INIT_BLOCKS(sb) +
 512                 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
 513         if (IS_ERR(handle))
 514                 return PTR_ERR(handle);
 515
 516         err = ext4_reserve_inode_write(handle, inode, &iloc);
 517         if (err)
 518                 goto out_stop;
 519
 520         transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
 521         if (!IS_ERR(transfer_to[PRJQUOTA])) {
 522
 523                 /* __dquot_transfer() calls back ext4_get_inode_usage() which
 524                  * counts xattr inode references.
 525                  */
 526                 down_read(&EXT4_I(inode)->xattr_sem);
 527                 err = __dquot_transfer(inode, transfer_to);
 528                 up_read(&EXT4_I(inode)->xattr_sem);
 529                 dqput(transfer_to[PRJQUOTA]);
 530                 if (err)
 531                         goto out_dirty;
 532         }
 533
 534         EXT4_I(inode)->i_projid = kprojid;
 535         inode->i_ctime = current_time(inode);
 536 out_dirty:
 537         rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
 538         if (!err)
 539                 err = rc;
 540 out_stop:
 541         ext4_journal_stop(handle);
 542         return err;
 543 }
 544 #else
 545 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
 546 {
 547         if (projid != EXT4_DEF_PROJID)
 548                 return -EOPNOTSUPP;
 549         return 0;
 550 }
 551 #endif
 552
 553 /* Transfer internal flags to xflags */
 554 static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
 555 {
 556         __u32 xflags = 0;
 557
 558         if (iflags & EXT4_SYNC_FL)
 559                 xflags |= FS_XFLAG_SYNC;
 560         if (iflags & EXT4_IMMUTABLE_FL)
 561                 xflags |= FS_XFLAG_IMMUTABLE;
 562         if (iflags & EXT4_APPEND_FL)
 563                 xflags |= FS_XFLAG_APPEND;
 564         if (iflags & EXT4_NODUMP_FL)
 565                 xflags |= FS_XFLAG_NODUMP;
 566         if (iflags & EXT4_NOATIME_FL)
 567                 xflags |= FS_XFLAG_NOATIME;
 568         if (iflags & EXT4_PROJINHERIT_FL)
 569                 xflags |= FS_XFLAG_PROJINHERIT;
 570         if (iflags & EXT4_DAX_FL)
 571                 xflags |= FS_XFLAG_DAX;
 572         return xflags;
 573 }
 574
 575 #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
 576                                   FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
 577                                   FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT | \
 578                                   FS_XFLAG_DAX)
 579
 580 /* Transfer xflags flags to internal */
 581 static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
 582 {
 583         unsigned long iflags = 0;
 584
 585         if (xflags & FS_XFLAG_SYNC)
 586                 iflags |= EXT4_SYNC_FL;
 587         if (xflags & FS_XFLAG_IMMUTABLE)
 588                 iflags |= EXT4_IMMUTABLE_FL;
 589         if (xflags & FS_XFLAG_APPEND)
 590                 iflags |= EXT4_APPEND_FL;
 591         if (xflags & FS_XFLAG_NODUMP)
 592                 iflags |= EXT4_NODUMP_FL;
 593         if (xflags & FS_XFLAG_NOATIME)
 594                 iflags |= EXT4_NOATIME_FL;
 595         if (xflags & FS_XFLAG_PROJINHERIT)
 596                 iflags |= EXT4_PROJINHERIT_FL;
 597         if (xflags & FS_XFLAG_DAX)
 598                 iflags |= EXT4_DAX_FL;
 599
 600         return iflags;
 601 }
 602
 603 static int ext4_shutdown(struct super_block *sb, unsigned long arg)
 604 {
 605         struct ext4_sb_info *sbi = EXT4_SB(sb);
 606         __u32 flags;
 607
 608         if (!capable(CAP_SYS_ADMIN))
 609                 return -EPERM;
 610
 611         if (get_user(flags, (__u32 __user *)arg))
 612                 return -EFAULT;
 613
 614         if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
 615                 return -EINVAL;
 616
 617         if (ext4_forced_shutdown(sbi))
 618                 return 0;
 619
 620         ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
 621         trace_ext4_shutdown(sb, flags);
 622
 623         switch (flags) {
 624         case EXT4_GOING_FLAGS_DEFAULT:
 625                 freeze_bdev(sb->s_bdev);
 626                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 627                 thaw_bdev(sb->s_bdev);
 628                 break;
 629         case EXT4_GOING_FLAGS_LOGFLUSH:
 630                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 631                 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
 632                         (void) ext4_force_commit(sb);
 633                         jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
 634                 }
 635                 break;
 636         case EXT4_GOING_FLAGS_NOLOGFLUSH:
 637                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 638                 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
 639                         jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
 640                 break;
 641         default:
 642                 return -EINVAL;
 643         }
 644         clear_opt(sb, DISCARD);
 645         return 0;
 646 }
 647
 648 struct getfsmap_info {
 649         struct super_block      *gi_sb;
 650         struct fsmap_head __user *gi_data;
 651         unsigned int            gi_idx;
 652         __u32                   gi_last_flags;
 653 };
 654
 655 static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
 656 {
 657         struct getfsmap_info *info = priv;
 658         struct fsmap fm;
 659
 660         trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
 661
 662         info->gi_last_flags = xfm->fmr_flags;
 663         ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
 664         if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
 665                         sizeof(struct fsmap)))
 666                 return -EFAULT;
 667
 668         return 0;
 669 }
 670
 671 static int ext4_ioc_getfsmap(struct super_block *sb,
 672                              struct fsmap_head __user *arg)
 673 {
 674         struct getfsmap_info info = { NULL };
 675         struct ext4_fsmap_head xhead = {0};
 676         struct fsmap_head head;
 677         bool aborted = false;
 678         int error;
 679
 680         if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
 681                 return -EFAULT;
 682         if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
 683             memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
 684                        sizeof(head.fmh_keys[0].fmr_reserved)) ||
 685             memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
 686                        sizeof(head.fmh_keys[1].fmr_reserved)))
 687                 return -EINVAL;
 688         /*
 689          * ext4 doesn't report file extents at all, so the only valid
 690          * file offsets are the magic ones (all zeroes or all ones).
 691          */
 692         if (head.fmh_keys[0].fmr_offset ||
 693             (head.fmh_keys[1].fmr_offset != 0 &&
 694              head.fmh_keys[1].fmr_offset != -1ULL))
 695                 return -EINVAL;
 696
 697         xhead.fmh_iflags = head.fmh_iflags;
 698         xhead.fmh_count = head.fmh_count;
 699         ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
 700         ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
 701
 702         trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
 703         trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
 704
 705         info.gi_sb = sb;
 706         info.gi_data = arg;
 707         error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
 708         if (error == EXT4_QUERY_RANGE_ABORT) {
 709                 error = 0;
 710                 aborted = true;
 711         } else if (error)
 712                 return error;
 713
 714         /* If we didn't abort, set the "last" flag in the last fmx */
 715         if (!aborted && info.gi_idx) {
 716                 info.gi_last_flags |= FMR_OF_LAST;
 717                 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
 718                                  &info.gi_last_flags,
 719                                  sizeof(info.gi_last_flags)))
 720                         return -EFAULT;
 721         }
 722
 723         /* copy back header */
 724         head.fmh_entries = xhead.fmh_entries;
 725         head.fmh_oflags = xhead.fmh_oflags;
 726         if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
 727                 return -EFAULT;
 728
 729         return 0;
 730 }
 731
 732 static long ext4_ioctl_group_add(struct file *file,
 733                                  struct ext4_new_group_data *input)
 734 {
 735         struct super_block *sb = file_inode(file)->i_sb;
 736         int err, err2=0;
 737
 738         err = ext4_resize_begin(sb);
 739         if (err)
 740                 return err;
 741
 742         if (ext4_has_feature_bigalloc(sb)) {
 743                 ext4_msg(sb, KERN_ERR,
 744                          "Online resizing not supported with bigalloc");
 745                 err = -EOPNOTSUPP;
 746                 goto group_add_out;
 747         }
 748
 749         err = mnt_want_write_file(file);
 750         if (err)
 751                 goto group_add_out;
 752
 753         err = ext4_group_add(sb, input);
 754         if (EXT4_SB(sb)->s_journal) {
 755                 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
 756                 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
 757                 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
 758         }
 759         if (err == 0)
 760                 err = err2;
 761         mnt_drop_write_file(file);
 762         if (!err && ext4_has_group_desc_csum(sb) &&
 763             test_opt(sb, INIT_INODE_TABLE))
 764                 err = ext4_register_li_request(sb, input->group);
 765 group_add_out:
 766         ext4_resize_end(sb);
 767         return err;
 768 }
 769
 770 static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
 771 {
 772         struct ext4_inode_info *ei = EXT4_I(inode);
 773
 774         simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags &
 775                                                       EXT4_FL_USER_VISIBLE));
 776
 777         if (ext4_has_feature_project(inode->i_sb))
 778                 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
 779 }
 780
 781 /* So that the fiemap access checks can't overflow on 32 bit machines. */
 782 #define FIEMAP_MAX_EXTENTS      (UINT_MAX / sizeof(struct fiemap_extent))
 783
 784 static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
 785 {
 786         struct fiemap fiemap;
 787         struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
 788         struct fiemap_extent_info fieinfo = { 0, };
 789         struct inode *inode = file_inode(filp);
 790         int error;
 791
 792         if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
 793                 return -EFAULT;
 794
 795         if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
 796                 return -EINVAL;
 797
 798         fieinfo.fi_flags = fiemap.fm_flags;
 799         fieinfo.fi_extents_max = fiemap.fm_extent_count;
 800         fieinfo.fi_extents_start = ufiemap->fm_extents;
 801
 802         error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
 803                         fiemap.fm_length);
 804         fiemap.fm_flags = fieinfo.fi_flags;
 805         fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
 806         if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
 807                 error = -EFAULT;
 808
 809         return error;
 810 }
 811
 812 static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 813 {
 814         struct inode *inode = file_inode(filp);
 815         struct super_block *sb = inode->i_sb;
 816         struct ext4_inode_info *ei = EXT4_I(inode);
 817         unsigned int flags;
 818
 819         ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
 820
 821         switch (cmd) {
 822         case FS_IOC_GETFSMAP:
 823                 return ext4_ioc_getfsmap(sb, (void __user *)arg);
 824         case FS_IOC_GETFLAGS:
 825                 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
 826                 if (S_ISREG(inode->i_mode))
 827                         flags &= ~EXT4_PROJINHERIT_FL;
 828                 return put_user(flags, (int __user *) arg);
 829         case FS_IOC_SETFLAGS: {
 830                 int err;
 831
 832                 if (!inode_owner_or_capable(inode))
 833                         return -EACCES;
 834
 835                 if (get_user(flags, (int __user *) arg))
 836                         return -EFAULT;
 837
 838                 if (flags & ~EXT4_FL_USER_VISIBLE)
 839                         return -EOPNOTSUPP;
 840                 /*
 841                  * chattr(1) grabs flags via GETFLAGS, modifies the result and
 842                  * passes that to SETFLAGS. So we cannot easily make SETFLAGS
 843                  * more restrictive than just silently masking off visible but
 844                  * not settable flags as we always did.
 845                  */
 846                 flags &= EXT4_FL_USER_MODIFIABLE;
 847                 if (ext4_mask_flags(inode->i_mode, flags) != flags)
 848                         return -EOPNOTSUPP;
 849
 850                 err = mnt_want_write_file(filp);
 851                 if (err)
 852                         return err;
 853
 854                 inode_lock(inode);
 855                 err = ext4_ioctl_check_immutable(inode,
 856                                 from_kprojid(&init_user_ns, ei->i_projid),
 857                                 flags);
 858                 if (!err)
 859                         err = ext4_ioctl_setflags(inode, flags);
 860                 inode_unlock(inode);
 861                 mnt_drop_write_file(filp);
 862                 return err;
 863         }
 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(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);
 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(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(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, 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);
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, sbi->s_sbh);
1158                         if (err)
1159                                 goto pwsalt_err_journal;
1160                         lock_buffer(sbi->s_sbh);
1161                         generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
1162                         ext4_superblock_csum_set(sb);
1163                         unlock_buffer(sbi->s_sbh);
1164                         err = ext4_handle_dirty_metadata(handle, NULL,
1165                                                          sbi->s_sbh);
1166                 pwsalt_err_journal:
1167                         err2 = ext4_journal_stop(handle);
1168                         if (err2 && !err)
1169                                 err = err2;
1170                 pwsalt_err_exit:
1171                         mnt_drop_write_file(filp);
1172                         if (err)
1173                                 return err;
1174                 }
1175                 if (copy_to_user((void __user *) arg,
1176                                  sbi->s_es->s_encrypt_pw_salt, 16))
1177                         return -EFAULT;
1178                 return 0;
1179 #else
1180                 return -EOPNOTSUPP;
1181 #endif
1182         }
1183         case FS_IOC_GET_ENCRYPTION_POLICY:
1184                 if (!ext4_has_feature_encrypt(sb))
1185                         return -EOPNOTSUPP;
1186                 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1187
1188         case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1189                 if (!ext4_has_feature_encrypt(sb))
1190                         return -EOPNOTSUPP;
1191                 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1192
1193         case FS_IOC_ADD_ENCRYPTION_KEY:
1194                 if (!ext4_has_feature_encrypt(sb))
1195                         return -EOPNOTSUPP;
1196                 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1197
1198         case FS_IOC_REMOVE_ENCRYPTION_KEY:
1199                 if (!ext4_has_feature_encrypt(sb))
1200                         return -EOPNOTSUPP;
1201                 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1202
1203         case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1204                 if (!ext4_has_feature_encrypt(sb))
1205                         return -EOPNOTSUPP;
1206                 return fscrypt_ioctl_remove_key_all_users(filp,
1207                                                           (void __user *)arg);
1208         case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1209                 if (!ext4_has_feature_encrypt(sb))
1210                         return -EOPNOTSUPP;
1211                 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1212
1213         case FS_IOC_GET_ENCRYPTION_NONCE:
1214                 if (!ext4_has_feature_encrypt(sb))
1215                         return -EOPNOTSUPP;
1216                 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
1217
1218         case EXT4_IOC_CLEAR_ES_CACHE:
1219         {
1220                 if (!inode_owner_or_capable(inode))
1221                         return -EACCES;
1222                 ext4_clear_inode_es(inode);
1223                 return 0;
1224         }
1225
1226         case EXT4_IOC_GETSTATE:
1227         {
1228                 __u32   state = 0;
1229
1230                 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1231                         state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1232                 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1233                         state |= EXT4_STATE_FLAG_NEW;
1234                 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1235                         state |= EXT4_STATE_FLAG_NEWENTRY;
1236                 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1237                         state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1238
1239                 return put_user(state, (__u32 __user *) arg);
1240         }
1241
1242         case EXT4_IOC_GET_ES_CACHE:
1243                 return ext4_ioctl_get_es_cache(filp, arg);
1244
1245         case FS_IOC_FSGETXATTR:
1246         {
1247                 struct fsxattr fa;
1248
1249                 ext4_fill_fsxattr(inode, &fa);
1250
1251                 if (copy_to_user((struct fsxattr __user *)arg,
1252                                  &fa, sizeof(fa)))
1253                         return -EFAULT;
1254                 return 0;
1255         }
1256         case FS_IOC_FSSETXATTR:
1257         {
1258                 struct fsxattr fa, old_fa;
1259                 int err;
1260
1261                 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
1262                                    sizeof(fa)))
1263                         return -EFAULT;
1264
1265                 /* Make sure caller has proper permission */
1266                 if (!inode_owner_or_capable(inode))
1267                         return -EACCES;
1268
1269                 if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
1270                         return -EOPNOTSUPP;
1271
1272                 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
1273                 if (ext4_mask_flags(inode->i_mode, flags) != flags)
1274                         return -EOPNOTSUPP;
1275
1276                 err = mnt_want_write_file(filp);
1277                 if (err)
1278                         return err;
1279
1280                 inode_lock(inode);
1281                 ext4_fill_fsxattr(inode, &old_fa);
1282                 err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
1283                 if (err)
1284                         goto out;
1285                 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
1286                          (flags & EXT4_FL_XFLAG_VISIBLE);
1287                 err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags);
1288                 if (err)
1289                         goto out;
1290                 err = ext4_ioctl_setflags(inode, flags);
1291                 if (err)
1292                         goto out;
1293                 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
1294 out:
1295                 inode_unlock(inode);
1296                 mnt_drop_write_file(filp);
1297                 return err;
1298         }
1299         case EXT4_IOC_SHUTDOWN:
1300                 return ext4_shutdown(sb, arg);
1301
1302         case FS_IOC_ENABLE_VERITY:
1303                 if (!ext4_has_feature_verity(sb))
1304                         return -EOPNOTSUPP;
1305                 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1306
1307         case FS_IOC_MEASURE_VERITY:
1308                 if (!ext4_has_feature_verity(sb))
1309                         return -EOPNOTSUPP;
1310                 return fsverity_ioctl_measure(filp, (void __user *)arg);
1311
1312         case FS_IOC_READ_VERITY_METADATA:
1313                 if (!ext4_has_feature_verity(sb))
1314                         return -EOPNOTSUPP;
1315                 return fsverity_ioctl_read_metadata(filp,
1316                                                     (const void __user *)arg);
1317
1318         default:
1319                 return -ENOTTY;
1320         }
1321 }
1322
1323 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1324 {
1325         long ret;
1326
1327         ext4_fc_start_update(file_inode(filp));
1328         ret = __ext4_ioctl(filp, cmd, arg);
1329         ext4_fc_stop_update(file_inode(filp));
1330
1331         return ret;
1332 }
1333
1334 #ifdef CONFIG_COMPAT
1335 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1336 {
1337         /* These are just misnamed, they actually get/put from/to user an int */
1338         switch (cmd) {
1339         case FS_IOC32_GETFLAGS:
1340                 cmd = FS_IOC_GETFLAGS;
1341                 break;
1342         case FS_IOC32_SETFLAGS:
1343                 cmd = FS_IOC_SETFLAGS;
1344                 break;
1345         case EXT4_IOC32_GETVERSION:
1346                 cmd = EXT4_IOC_GETVERSION;
1347                 break;
1348         case EXT4_IOC32_SETVERSION:
1349                 cmd = EXT4_IOC_SETVERSION;
1350                 break;
1351         case EXT4_IOC32_GROUP_EXTEND:
1352                 cmd = EXT4_IOC_GROUP_EXTEND;
1353                 break;
1354         case EXT4_IOC32_GETVERSION_OLD:
1355                 cmd = EXT4_IOC_GETVERSION_OLD;
1356                 break;
1357         case EXT4_IOC32_SETVERSION_OLD:
1358                 cmd = EXT4_IOC_SETVERSION_OLD;
1359                 break;
1360         case EXT4_IOC32_GETRSVSZ:
1361                 cmd = EXT4_IOC_GETRSVSZ;
1362                 break;
1363         case EXT4_IOC32_SETRSVSZ:
1364                 cmd = EXT4_IOC_SETRSVSZ;
1365                 break;
1366         case EXT4_IOC32_GROUP_ADD: {
1367                 struct compat_ext4_new_group_input __user *uinput;
1368                 struct ext4_new_group_data input;
1369                 int err;
1370
1371                 uinput = compat_ptr(arg);
1372                 err = get_user(input.group, &uinput->group);
1373                 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1374                 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1375                 err |= get_user(input.inode_table, &uinput->inode_table);
1376                 err |= get_user(input.blocks_count, &uinput->blocks_count);
1377                 err |= get_user(input.reserved_blocks,
1378                                 &uinput->reserved_blocks);
1379                 if (err)
1380                         return -EFAULT;
1381                 return ext4_ioctl_group_add(file, &input);
1382         }
1383         case EXT4_IOC_MOVE_EXT:
1384         case EXT4_IOC_RESIZE_FS:
1385         case FITRIM:
1386         case EXT4_IOC_PRECACHE_EXTENTS:
1387         case FS_IOC_SET_ENCRYPTION_POLICY:
1388         case FS_IOC_GET_ENCRYPTION_PWSALT:
1389         case FS_IOC_GET_ENCRYPTION_POLICY:
1390         case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1391         case FS_IOC_ADD_ENCRYPTION_KEY:
1392         case FS_IOC_REMOVE_ENCRYPTION_KEY:
1393         case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1394         case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1395         case FS_IOC_GET_ENCRYPTION_NONCE:
1396         case EXT4_IOC_SHUTDOWN:
1397         case FS_IOC_GETFSMAP:
1398         case FS_IOC_ENABLE_VERITY:
1399         case FS_IOC_MEASURE_VERITY:
1400         case FS_IOC_READ_VERITY_METADATA:
1401         case EXT4_IOC_CLEAR_ES_CACHE:
1402         case EXT4_IOC_GETSTATE:
1403         case EXT4_IOC_GET_ES_CACHE:
1404         case FS_IOC_FSGETXATTR:
1405         case FS_IOC_FSSETXATTR:
1406                 break;
1407         default:
1408                 return -ENOIOCTLCMD;
1409         }
1410         return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1411 }
1412 #endif