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,
 125                         EXT4_IGET_SPECIAL | EXT4_IGET_BAD);
 126         if (IS_ERR(inode_bl))
 127                 return PTR_ERR(inode_bl);
 128         ei_bl = EXT4_I(inode_bl);
 129
 130         /* Protect orig inodes against a truncate and make sure,
 131          * that only 1 swap_inode_boot_loader is running. */
 132         lock_two_nondirectories(inode, inode_bl);
 133
 134         if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
 135             IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
 136             (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
 137             ext4_has_inline_data(inode)) {
 138                 err = -EINVAL;
 139                 goto journal_err_out;
 140         }
 141
 142         if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
 143             !inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) {
 144                 err = -EPERM;
 145                 goto journal_err_out;
 146         }
 147
 148         down_write(&EXT4_I(inode)->i_mmap_sem);
 149         err = filemap_write_and_wait(inode->i_mapping);
 150         if (err)
 151                 goto err_out;
 152
 153         err = filemap_write_and_wait(inode_bl->i_mapping);
 154         if (err)
 155                 goto err_out;
 156
 157         /* Wait for all existing dio workers */
 158         inode_dio_wait(inode);
 159         inode_dio_wait(inode_bl);
 160
 161         truncate_inode_pages(&inode->i_data, 0);
 162         truncate_inode_pages(&inode_bl->i_data, 0);
 163
 164         handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
 165         if (IS_ERR(handle)) {
 166                 err = -EINVAL;
 167                 goto err_out;
 168         }
 169         ext4_fc_start_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT);
 170
 171         /* Protect extent tree against block allocations via delalloc */
 172         ext4_double_down_write_data_sem(inode, inode_bl);
 173
 174         if (is_bad_inode(inode_bl) || !S_ISREG(inode_bl->i_mode)) {
 175                 /* this inode has never been used as a BOOT_LOADER */
 176                 set_nlink(inode_bl, 1);
 177                 i_uid_write(inode_bl, 0);
 178                 i_gid_write(inode_bl, 0);
 179                 inode_bl->i_flags = 0;
 180                 ei_bl->i_flags = 0;
 181                 inode_set_iversion(inode_bl, 1);
 182                 i_size_write(inode_bl, 0);
 183                 EXT4_I(inode_bl)->i_disksize = inode_bl->i_size;
 184                 inode_bl->i_mode = S_IFREG;
 185                 if (ext4_has_feature_extents(sb)) {
 186                         ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
 187                         ext4_ext_tree_init(handle, inode_bl);
 188                 } else
 189                         memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
 190         }
 191
 192         err = dquot_initialize(inode);
 193         if (err)
 194                 goto err_out1;
 195
 196         size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
 197         size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
 198         diff = size - size_bl;
 199         swap_inode_data(inode, inode_bl);
 200
 201         inode->i_ctime = inode_bl->i_ctime = current_time(inode);
 202
 203         inode->i_generation = prandom_u32();
 204         inode_bl->i_generation = prandom_u32();
 205         ext4_reset_inode_seed(inode);
 206         ext4_reset_inode_seed(inode_bl);
 207
 208         ext4_discard_preallocations(inode, 0);
 209
 210         err = ext4_mark_inode_dirty(handle, inode);
 211         if (err < 0) {
 212                 /* No need to update quota information. */
 213                 ext4_warning(inode->i_sb,
 214                         "couldn't mark inode #%lu dirty (err %d)",
 215                         inode->i_ino, err);
 216                 /* Revert all changes: */
 217                 swap_inode_data(inode, inode_bl);
 218                 ext4_mark_inode_dirty(handle, inode);
 219                 goto err_out1;
 220         }
 221
 222         blocks = inode_bl->i_blocks;
 223         bytes = inode_bl->i_bytes;
 224         inode_bl->i_blocks = inode->i_blocks;
 225         inode_bl->i_bytes = inode->i_bytes;
 226         err = ext4_mark_inode_dirty(handle, inode_bl);
 227         if (err < 0) {
 228                 /* No need to update quota information. */
 229                 ext4_warning(inode_bl->i_sb,
 230                         "couldn't mark inode #%lu dirty (err %d)",
 231                         inode_bl->i_ino, err);
 232                 goto revert;
 233         }
 234
 235         /* Bootloader inode should not be counted into quota information. */
 236         if (diff > 0)
 237                 dquot_free_space(inode, diff);
 238         else
 239                 err = dquot_alloc_space(inode, -1 * diff);
 240
 241         if (err < 0) {
 242 revert:
 243                 /* Revert all changes: */
 244                 inode_bl->i_blocks = blocks;
 245                 inode_bl->i_bytes = bytes;
 246                 swap_inode_data(inode, inode_bl);
 247                 ext4_mark_inode_dirty(handle, inode);
 248                 ext4_mark_inode_dirty(handle, inode_bl);
 249         }
 250
 251 err_out1:
 252         ext4_journal_stop(handle);
 253         ext4_fc_stop_ineligible(sb);
 254         ext4_double_up_write_data_sem(inode, inode_bl);
 255
 256 err_out:
 257         up_write(&EXT4_I(inode)->i_mmap_sem);
 258 journal_err_out:
 259         unlock_two_nondirectories(inode, inode_bl);
 260         iput(inode_bl);
 261         return err;
 262 }
 263
 264 #ifdef CONFIG_FS_ENCRYPTION
 265 static int uuid_is_zero(__u8 u[16])
 266 {
 267         int     i;
 268
 269         for (i = 0; i < 16; i++)
 270                 if (u[i])
 271                         return 0;
 272         return 1;
 273 }
 274 #endif
 275
 276 /*
 277  * If immutable is set and we are not clearing it, we're not allowed to change
 278  * anything else in the inode.  Don't error out if we're only trying to set
 279  * immutable on an immutable file.
 280  */
 281 static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
 282                                       unsigned int flags)
 283 {
 284         struct ext4_inode_info *ei = EXT4_I(inode);
 285         unsigned int oldflags = ei->i_flags;
 286
 287         if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
 288                 return 0;
 289
 290         if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
 291                 return -EPERM;
 292         if (ext4_has_feature_project(inode->i_sb) &&
 293             __kprojid_val(ei->i_projid) != new_projid)
 294                 return -EPERM;
 295
 296         return 0;
 297 }
 298
 299 static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
 300 {
 301         struct ext4_inode_info *ei = EXT4_I(inode);
 302
 303         if (S_ISDIR(inode->i_mode))
 304                 return;
 305
 306         if (test_opt2(inode->i_sb, DAX_NEVER) ||
 307             test_opt(inode->i_sb, DAX_ALWAYS))
 308                 return;
 309
 310         if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
 311                 d_mark_dontcache(inode);
 312 }
 313
 314 static bool dax_compatible(struct inode *inode, unsigned int oldflags,
 315                            unsigned int flags)
 316 {
 317         /* Allow the DAX flag to be changed on inline directories */
 318         if (S_ISDIR(inode->i_mode)) {
 319                 flags &= ~EXT4_INLINE_DATA_FL;
 320                 oldflags &= ~EXT4_INLINE_DATA_FL;
 321         }
 322
 323         if (flags & EXT4_DAX_FL) {
 324                 if ((oldflags & EXT4_DAX_MUT_EXCL) ||
 325                      ext4_test_inode_state(inode,
 326                                           EXT4_STATE_VERITY_IN_PROGRESS)) {
 327                         return false;
 328                 }
 329         }
 330
 331         if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
 332                         return false;
 333
 334         return true;
 335 }
 336
 337 static int ext4_ioctl_setflags(struct inode *inode,
 338                                unsigned int flags)
 339 {
 340         struct ext4_inode_info *ei = EXT4_I(inode);
 341         handle_t *handle = NULL;
 342         int err = -EPERM, migrate = 0;
 343         struct ext4_iloc iloc;
 344         unsigned int oldflags, mask, i;
 345         struct super_block *sb = inode->i_sb;
 346
 347         /* Is it quota file? Do not allow user to mess with it */
 348         if (ext4_is_quota_file(inode))
 349                 goto flags_out;
 350
 351         oldflags = ei->i_flags;
 352
 353         err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
 354         if (err)
 355                 goto flags_out;
 356
 357         /*
 358          * The JOURNAL_DATA flag can only be changed by
 359          * the relevant capability.
 360          */
 361         if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
 362                 if (!capable(CAP_SYS_RESOURCE))
 363                         goto flags_out;
 364         }
 365
 366         if (!dax_compatible(inode, oldflags, flags)) {
 367                 err = -EOPNOTSUPP;
 368                 goto flags_out;
 369         }
 370
 371         if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
 372                 migrate = 1;
 373
 374         if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
 375                 if (!ext4_has_feature_casefold(sb)) {
 376                         err = -EOPNOTSUPP;
 377                         goto flags_out;
 378                 }
 379
 380                 if (!S_ISDIR(inode->i_mode)) {
 381                         err = -ENOTDIR;
 382                         goto flags_out;
 383                 }
 384
 385                 if (!ext4_empty_dir(inode)) {
 386                         err = -ENOTEMPTY;
 387                         goto flags_out;
 388                 }
 389         }
 390
 391         /*
 392          * Wait for all pending directio and then flush all the dirty pages
 393          * for this file.  The flush marks all the pages readonly, so any
 394          * subsequent attempt to write to the file (particularly mmap pages)
 395          * will come through the filesystem and fail.
 396          */
 397         if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
 398             (flags & EXT4_IMMUTABLE_FL)) {
 399                 inode_dio_wait(inode);
 400                 err = filemap_write_and_wait(inode->i_mapping);
 401                 if (err)
 402                         goto flags_out;
 403         }
 404
 405         handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
 406         if (IS_ERR(handle)) {
 407                 err = PTR_ERR(handle);
 408                 goto flags_out;
 409         }
 410         if (IS_SYNC(inode))
 411                 ext4_handle_sync(handle);
 412         err = ext4_reserve_inode_write(handle, inode, &iloc);
 413         if (err)
 414                 goto flags_err;
 415
 416         ext4_dax_dontcache(inode, flags);
 417
 418         for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
 419                 if (!(mask & EXT4_FL_USER_MODIFIABLE))
 420                         continue;
 421                 /* These flags get special treatment later */
 422                 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
 423                         continue;
 424                 if (mask & flags)
 425                         ext4_set_inode_flag(inode, i);
 426                 else
 427                         ext4_clear_inode_flag(inode, i);
 428         }
 429
 430         ext4_set_inode_flags(inode, false);
 431
 432         inode->i_ctime = current_time(inode);
 433
 434         err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 435 flags_err:
 436         ext4_journal_stop(handle);
 437         if (err)
 438                 goto flags_out;
 439
 440         if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
 441                 /*
 442                  * Changes to the journaling mode can cause unsafe changes to
 443                  * S_DAX if the inode is DAX
 444                  */
 445                 if (IS_DAX(inode)) {
 446                         err = -EBUSY;
 447                         goto flags_out;
 448                 }
 449
 450                 err = ext4_change_inode_journal_flag(inode,
 451                                                      flags & EXT4_JOURNAL_DATA_FL);
 452                 if (err)
 453                         goto flags_out;
 454         }
 455         if (migrate) {
 456                 if (flags & EXT4_EXTENTS_FL)
 457                         err = ext4_ext_migrate(inode);
 458                 else
 459                         err = ext4_ind_migrate(inode);
 460         }
 461
 462 flags_out:
 463         return err;
 464 }
 465
 466 #ifdef CONFIG_QUOTA
 467 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
 468 {
 469         struct inode *inode = file_inode(filp);
 470         struct super_block *sb = inode->i_sb;
 471         struct ext4_inode_info *ei = EXT4_I(inode);
 472         int err, rc;
 473         handle_t *handle;
 474         kprojid_t kprojid;
 475         struct ext4_iloc iloc;
 476         struct ext4_inode *raw_inode;
 477         struct dquot *transfer_to[MAXQUOTAS] = { };
 478
 479         if (!ext4_has_feature_project(sb)) {
 480                 if (projid != EXT4_DEF_PROJID)
 481                         return -EOPNOTSUPP;
 482                 else
 483                         return 0;
 484         }
 485
 486         if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
 487                 return -EOPNOTSUPP;
 488
 489         kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
 490
 491         if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
 492                 return 0;
 493
 494         err = -EPERM;
 495         /* Is it quota file? Do not allow user to mess with it */
 496         if (ext4_is_quota_file(inode))
 497                 return err;
 498
 499         err = dquot_initialize(inode);
 500         if (err)
 501                 return err;
 502
 503         err = ext4_get_inode_loc(inode, &iloc);
 504         if (err)
 505                 return err;
 506
 507         raw_inode = ext4_raw_inode(&iloc);
 508         if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
 509                 err = ext4_expand_extra_isize(inode,
 510                                               EXT4_SB(sb)->s_want_extra_isize,
 511                                               &iloc);
 512                 if (err)
 513                         return err;
 514         } else {
 515                 brelse(iloc.bh);
 516         }
 517
 518         handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
 519                 EXT4_QUOTA_INIT_BLOCKS(sb) +
 520                 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
 521         if (IS_ERR(handle))
 522                 return PTR_ERR(handle);
 523
 524         err = ext4_reserve_inode_write(handle, inode, &iloc);
 525         if (err)
 526                 goto out_stop;
 527
 528         transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
 529         if (!IS_ERR(transfer_to[PRJQUOTA])) {
 530
 531                 /* __dquot_transfer() calls back ext4_get_inode_usage() which
 532                  * counts xattr inode references.
 533                  */
 534                 down_read(&EXT4_I(inode)->xattr_sem);
 535                 err = __dquot_transfer(inode, transfer_to);
 536                 up_read(&EXT4_I(inode)->xattr_sem);
 537                 dqput(transfer_to[PRJQUOTA]);
 538                 if (err)
 539                         goto out_dirty;
 540         }
 541
 542         EXT4_I(inode)->i_projid = kprojid;
 543         inode->i_ctime = current_time(inode);
 544 out_dirty:
 545         rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
 546         if (!err)
 547                 err = rc;
 548 out_stop:
 549         ext4_journal_stop(handle);
 550         return err;
 551 }
 552 #else
 553 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
 554 {
 555         if (projid != EXT4_DEF_PROJID)
 556                 return -EOPNOTSUPP;
 557         return 0;
 558 }
 559 #endif
 560
 561 /* Transfer internal flags to xflags */
 562 static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
 563 {
 564         __u32 xflags = 0;
 565
 566         if (iflags & EXT4_SYNC_FL)
 567                 xflags |= FS_XFLAG_SYNC;
 568         if (iflags & EXT4_IMMUTABLE_FL)
 569                 xflags |= FS_XFLAG_IMMUTABLE;
 570         if (iflags & EXT4_APPEND_FL)
 571                 xflags |= FS_XFLAG_APPEND;
 572         if (iflags & EXT4_NODUMP_FL)
 573                 xflags |= FS_XFLAG_NODUMP;
 574         if (iflags & EXT4_NOATIME_FL)
 575                 xflags |= FS_XFLAG_NOATIME;
 576         if (iflags & EXT4_PROJINHERIT_FL)
 577                 xflags |= FS_XFLAG_PROJINHERIT;
 578         if (iflags & EXT4_DAX_FL)
 579                 xflags |= FS_XFLAG_DAX;
 580         return xflags;
 581 }
 582
 583 #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
 584                                   FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
 585                                   FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT | \
 586                                   FS_XFLAG_DAX)
 587
 588 /* Transfer xflags flags to internal */
 589 static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
 590 {
 591         unsigned long iflags = 0;
 592
 593         if (xflags & FS_XFLAG_SYNC)
 594                 iflags |= EXT4_SYNC_FL;
 595         if (xflags & FS_XFLAG_IMMUTABLE)
 596                 iflags |= EXT4_IMMUTABLE_FL;
 597         if (xflags & FS_XFLAG_APPEND)
 598                 iflags |= EXT4_APPEND_FL;
 599         if (xflags & FS_XFLAG_NODUMP)
 600                 iflags |= EXT4_NODUMP_FL;
 601         if (xflags & FS_XFLAG_NOATIME)
 602                 iflags |= EXT4_NOATIME_FL;
 603         if (xflags & FS_XFLAG_PROJINHERIT)
 604                 iflags |= EXT4_PROJINHERIT_FL;
 605         if (xflags & FS_XFLAG_DAX)
 606                 iflags |= EXT4_DAX_FL;
 607
 608         return iflags;
 609 }
 610
 611 static int ext4_shutdown(struct super_block *sb, unsigned long arg)
 612 {
 613         struct ext4_sb_info *sbi = EXT4_SB(sb);
 614         __u32 flags;
 615         struct super_block *ret;
 616
 617         if (!capable(CAP_SYS_ADMIN))
 618                 return -EPERM;
 619
 620         if (get_user(flags, (__u32 __user *)arg))
 621                 return -EFAULT;
 622
 623         if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
 624                 return -EINVAL;
 625
 626         if (ext4_forced_shutdown(sbi))
 627                 return 0;
 628
 629         ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
 630         trace_ext4_shutdown(sb, flags);
 631
 632         switch (flags) {
 633         case EXT4_GOING_FLAGS_DEFAULT:
 634                 ret = freeze_bdev(sb->s_bdev);
 635                 if (IS_ERR(ret))
 636                         return PTR_ERR(ret);
 637                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 638                 thaw_bdev(sb->s_bdev, sb);
 639                 break;
 640         case EXT4_GOING_FLAGS_LOGFLUSH:
 641                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 642                 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
 643                         (void) ext4_force_commit(sb);
 644                         jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
 645                 }
 646                 break;
 647         case EXT4_GOING_FLAGS_NOLOGFLUSH:
 648                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 649                 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
 650                         jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
 651                 break;
 652         default:
 653                 return -EINVAL;
 654         }
 655         clear_opt(sb, DISCARD);
 656         return 0;
 657 }
 658
 659 struct getfsmap_info {
 660         struct super_block      *gi_sb;
 661         struct fsmap_head __user *gi_data;
 662         unsigned int            gi_idx;
 663         __u32                   gi_last_flags;
 664 };
 665
 666 static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
 667 {
 668         struct getfsmap_info *info = priv;
 669         struct fsmap fm;
 670
 671         trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
 672
 673         info->gi_last_flags = xfm->fmr_flags;
 674         ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
 675         if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
 676                         sizeof(struct fsmap)))
 677                 return -EFAULT;
 678
 679         return 0;
 680 }
 681
 682 static int ext4_ioc_getfsmap(struct super_block *sb,
 683                              struct fsmap_head __user *arg)
 684 {
 685         struct getfsmap_info info = { NULL };
 686         struct ext4_fsmap_head xhead = {0};
 687         struct fsmap_head head;
 688         bool aborted = false;
 689         int error;
 690
 691         if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
 692                 return -EFAULT;
 693         if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
 694             memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
 695                        sizeof(head.fmh_keys[0].fmr_reserved)) ||
 696             memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
 697                        sizeof(head.fmh_keys[1].fmr_reserved)))
 698                 return -EINVAL;
 699         /*
 700          * ext4 doesn't report file extents at all, so the only valid
 701          * file offsets are the magic ones (all zeroes or all ones).
 702          */
 703         if (head.fmh_keys[0].fmr_offset ||
 704             (head.fmh_keys[1].fmr_offset != 0 &&
 705              head.fmh_keys[1].fmr_offset != -1ULL))
 706                 return -EINVAL;
 707
 708         xhead.fmh_iflags = head.fmh_iflags;
 709         xhead.fmh_count = head.fmh_count;
 710         ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
 711         ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
 712
 713         trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
 714         trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
 715
 716         info.gi_sb = sb;
 717         info.gi_data = arg;
 718         error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
 719         if (error == EXT4_QUERY_RANGE_ABORT) {
 720                 error = 0;
 721                 aborted = true;
 722         } else if (error)
 723                 return error;
 724
 725         /* If we didn't abort, set the "last" flag in the last fmx */
 726         if (!aborted && info.gi_idx) {
 727                 info.gi_last_flags |= FMR_OF_LAST;
 728                 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
 729                                  &info.gi_last_flags,
 730                                  sizeof(info.gi_last_flags)))
 731                         return -EFAULT;
 732         }
 733
 734         /* copy back header */
 735         head.fmh_entries = xhead.fmh_entries;
 736         head.fmh_oflags = xhead.fmh_oflags;
 737         if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
 738                 return -EFAULT;
 739
 740         return 0;
 741 }
 742
 743 static long ext4_ioctl_group_add(struct file *file,
 744                                  struct ext4_new_group_data *input)
 745 {
 746         struct super_block *sb = file_inode(file)->i_sb;
 747         int err, err2=0;
 748
 749         err = ext4_resize_begin(sb);
 750         if (err)
 751                 return err;
 752
 753         if (ext4_has_feature_bigalloc(sb)) {
 754                 ext4_msg(sb, KERN_ERR,
 755                          "Online resizing not supported with bigalloc");
 756                 err = -EOPNOTSUPP;
 757                 goto group_add_out;
 758         }
 759
 760         err = mnt_want_write_file(file);
 761         if (err)
 762                 goto group_add_out;
 763
 764         err = ext4_group_add(sb, input);
 765         if (EXT4_SB(sb)->s_journal) {
 766                 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
 767                 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
 768                 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
 769         }
 770         if (err == 0)
 771                 err = err2;
 772         mnt_drop_write_file(file);
 773         if (!err && ext4_has_group_desc_csum(sb) &&
 774             test_opt(sb, INIT_INODE_TABLE))
 775                 err = ext4_register_li_request(sb, input->group);
 776 group_add_out:
 777         ext4_resize_end(sb);
 778         return err;
 779 }
 780
 781 static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
 782 {
 783         struct ext4_inode_info *ei = EXT4_I(inode);
 784
 785         simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags &
 786                                                       EXT4_FL_USER_VISIBLE));
 787
 788         if (ext4_has_feature_project(inode->i_sb))
 789                 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
 790 }
 791
 792 /* So that the fiemap access checks can't overflow on 32 bit machines. */
 793 #define FIEMAP_MAX_EXTENTS      (UINT_MAX / sizeof(struct fiemap_extent))
 794
 795 static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
 796 {
 797         struct fiemap fiemap;
 798         struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
 799         struct fiemap_extent_info fieinfo = { 0, };
 800         struct inode *inode = file_inode(filp);
 801         int error;
 802
 803         if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
 804                 return -EFAULT;
 805
 806         if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
 807                 return -EINVAL;
 808
 809         fieinfo.fi_flags = fiemap.fm_flags;
 810         fieinfo.fi_extents_max = fiemap.fm_extent_count;
 811         fieinfo.fi_extents_start = ufiemap->fm_extents;
 812
 813         error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
 814                         fiemap.fm_length);
 815         fiemap.fm_flags = fieinfo.fi_flags;
 816         fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
 817         if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
 818                 error = -EFAULT;
 819
 820         return error;
 821 }
 822
 823 static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 824 {
 825         struct inode *inode = file_inode(filp);
 826         struct super_block *sb = inode->i_sb;
 827         struct ext4_inode_info *ei = EXT4_I(inode);
 828         unsigned int flags;
 829
 830         ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
 831
 832         switch (cmd) {
 833         case FS_IOC_GETFSMAP:
 834                 return ext4_ioc_getfsmap(sb, (void __user *)arg);
 835         case FS_IOC_GETFLAGS:
 836                 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
 837                 if (S_ISREG(inode->i_mode))
 838                         flags &= ~EXT4_PROJINHERIT_FL;
 839                 return put_user(flags, (int __user *) arg);
 840         case FS_IOC_SETFLAGS: {
 841                 int err;
 842
 843                 if (!inode_owner_or_capable(inode))
 844                         return -EACCES;
 845
 846                 if (get_user(flags, (int __user *) arg))
 847                         return -EFAULT;
 848
 849                 if (flags & ~EXT4_FL_USER_VISIBLE)
 850                         return -EOPNOTSUPP;
 851                 /*
 852                  * chattr(1) grabs flags via GETFLAGS, modifies the result and
 853                  * passes that to SETFLAGS. So we cannot easily make SETFLAGS
 854                  * more restrictive than just silently masking off visible but
 855                  * not settable flags as we always did.
 856                  */
 857                 flags &= EXT4_FL_USER_MODIFIABLE;
 858                 if (ext4_mask_flags(inode->i_mode, flags) != flags)
 859                         return -EOPNOTSUPP;
 860
 861                 err = mnt_want_write_file(filp);
 862                 if (err)
 863                         return err;
 864
 865                 inode_lock(inode);
 866                 err = ext4_ioctl_check_immutable(inode,
 867                                 from_kprojid(&init_user_ns, ei->i_projid),
 868                                 flags);
 869                 if (!err)
 870                         err = ext4_ioctl_setflags(inode, flags);
 871                 inode_unlock(inode);
 872                 mnt_drop_write_file(filp);
 873                 return err;
 874         }
 875         case EXT4_IOC_GETVERSION:
 876         case EXT4_IOC_GETVERSION_OLD:
 877                 return put_user(inode->i_generation, (int __user *) arg);
 878         case EXT4_IOC_SETVERSION:
 879         case EXT4_IOC_SETVERSION_OLD: {
 880                 handle_t *handle;
 881                 struct ext4_iloc iloc;
 882                 __u32 generation;
 883                 int err;
 884
 885                 if (!inode_owner_or_capable(inode))
 886                         return -EPERM;
 887
 888                 if (ext4_has_metadata_csum(inode->i_sb)) {
 889                         ext4_warning(sb, "Setting inode version is not "
 890                                      "supported with metadata_csum enabled.");
 891                         return -ENOTTY;
 892                 }
 893
 894                 err = mnt_want_write_file(filp);
 895                 if (err)
 896                         return err;
 897                 if (get_user(generation, (int __user *) arg)) {
 898                         err = -EFAULT;
 899                         goto setversion_out;
 900                 }
 901
 902                 inode_lock(inode);
 903                 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
 904                 if (IS_ERR(handle)) {
 905                         err = PTR_ERR(handle);
 906                         goto unlock_out;
 907                 }
 908                 err = ext4_reserve_inode_write(handle, inode, &iloc);
 909                 if (err == 0) {
 910                         inode->i_ctime = current_time(inode);
 911                         inode->i_generation = generation;
 912                         err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 913                 }
 914                 ext4_journal_stop(handle);
 915
 916 unlock_out:
 917                 inode_unlock(inode);
 918 setversion_out:
 919                 mnt_drop_write_file(filp);
 920                 return err;
 921         }
 922         case EXT4_IOC_GROUP_EXTEND: {
 923                 ext4_fsblk_t n_blocks_count;
 924                 int err, err2=0;
 925
 926                 err = ext4_resize_begin(sb);
 927                 if (err)
 928                         return err;
 929
 930                 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
 931                         err = -EFAULT;
 932                         goto group_extend_out;
 933                 }
 934
 935                 if (ext4_has_feature_bigalloc(sb)) {
 936                         ext4_msg(sb, KERN_ERR,
 937                                  "Online resizing not supported with bigalloc");
 938                         err = -EOPNOTSUPP;
 939                         goto group_extend_out;
 940                 }
 941
 942                 err = mnt_want_write_file(filp);
 943                 if (err)
 944                         goto group_extend_out;
 945
 946                 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
 947                 if (EXT4_SB(sb)->s_journal) {
 948                         jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
 949                         err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
 950                         jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
 951                 }
 952                 if (err == 0)
 953                         err = err2;
 954                 mnt_drop_write_file(filp);
 955 group_extend_out:
 956                 ext4_resize_end(sb);
 957                 return err;
 958         }
 959
 960         case EXT4_IOC_MOVE_EXT: {
 961                 struct move_extent me;
 962                 struct fd donor;
 963                 int err;
 964
 965                 if (!(filp->f_mode & FMODE_READ) ||
 966                     !(filp->f_mode & FMODE_WRITE))
 967                         return -EBADF;
 968
 969                 if (copy_from_user(&me,
 970                         (struct move_extent __user *)arg, sizeof(me)))
 971                         return -EFAULT;
 972                 me.moved_len = 0;
 973
 974                 donor = fdget(me.donor_fd);
 975                 if (!donor.file)
 976                         return -EBADF;
 977
 978                 if (!(donor.file->f_mode & FMODE_WRITE)) {
 979                         err = -EBADF;
 980                         goto mext_out;
 981                 }
 982
 983                 if (ext4_has_feature_bigalloc(sb)) {
 984                         ext4_msg(sb, KERN_ERR,
 985                                  "Online defrag not supported with bigalloc");
 986                         err = -EOPNOTSUPP;
 987                         goto mext_out;
 988                 } else if (IS_DAX(inode)) {
 989                         ext4_msg(sb, KERN_ERR,
 990                                  "Online defrag not supported with DAX");
 991                         err = -EOPNOTSUPP;
 992                         goto mext_out;
 993                 }
 994
 995                 err = mnt_want_write_file(filp);
 996                 if (err)
 997                         goto mext_out;
 998
 999                 err = ext4_move_extents(filp, donor.file, me.orig_start,
1000                                         me.donor_start, me.len, &me.moved_len);
1001                 mnt_drop_write_file(filp);
1002
1003                 if (copy_to_user((struct move_extent __user *)arg,
1004                                  &me, sizeof(me)))
1005                         err = -EFAULT;
1006 mext_out:
1007                 fdput(donor);
1008                 return err;
1009         }
1010
1011         case EXT4_IOC_GROUP_ADD: {
1012                 struct ext4_new_group_data input;
1013
1014                 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
1015                                 sizeof(input)))
1016                         return -EFAULT;
1017
1018                 return ext4_ioctl_group_add(filp, &input);
1019         }
1020
1021         case EXT4_IOC_MIGRATE:
1022         {
1023                 int err;
1024                 if (!inode_owner_or_capable(inode))
1025                         return -EACCES;
1026
1027                 err = mnt_want_write_file(filp);
1028                 if (err)
1029                         return err;
1030                 /*
1031                  * inode_mutex prevent write and truncate on the file.
1032                  * Read still goes through. We take i_data_sem in
1033                  * ext4_ext_swap_inode_data before we switch the
1034                  * inode format to prevent read.
1035                  */
1036                 inode_lock((inode));
1037                 err = ext4_ext_migrate(inode);
1038                 inode_unlock((inode));
1039                 mnt_drop_write_file(filp);
1040                 return err;
1041         }
1042
1043         case EXT4_IOC_ALLOC_DA_BLKS:
1044         {
1045                 int err;
1046                 if (!inode_owner_or_capable(inode))
1047                         return -EACCES;
1048
1049                 err = mnt_want_write_file(filp);
1050                 if (err)
1051                         return err;
1052                 err = ext4_alloc_da_blocks(inode);
1053                 mnt_drop_write_file(filp);
1054                 return err;
1055         }
1056
1057         case EXT4_IOC_SWAP_BOOT:
1058         {
1059                 int err;
1060                 if (!(filp->f_mode & FMODE_WRITE))
1061                         return -EBADF;
1062                 err = mnt_want_write_file(filp);
1063                 if (err)
1064                         return err;
1065                 err = swap_inode_boot_loader(sb, inode);
1066                 mnt_drop_write_file(filp);
1067                 return err;
1068         }
1069
1070         case EXT4_IOC_RESIZE_FS: {
1071                 ext4_fsblk_t n_blocks_count;
1072                 int err = 0, err2 = 0;
1073                 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
1074
1075                 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
1076                                    sizeof(__u64))) {
1077                         return -EFAULT;
1078                 }
1079
1080                 err = ext4_resize_begin(sb);
1081                 if (err)
1082                         return err;
1083
1084                 err = mnt_want_write_file(filp);
1085                 if (err)
1086                         goto resizefs_out;
1087
1088                 err = ext4_resize_fs(sb, n_blocks_count);
1089                 if (EXT4_SB(sb)->s_journal) {
1090                         ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE);
1091                         jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1092                         err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
1093                         jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1094                 }
1095                 if (err == 0)
1096                         err = err2;
1097                 mnt_drop_write_file(filp);
1098                 if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
1099                     ext4_has_group_desc_csum(sb) &&
1100                     test_opt(sb, INIT_INODE_TABLE))
1101                         err = ext4_register_li_request(sb, o_group);
1102
1103 resizefs_out:
1104                 ext4_resize_end(sb);
1105                 return err;
1106         }
1107
1108         case FITRIM:
1109         {
1110                 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1111                 struct fstrim_range range;
1112                 int ret = 0;
1113
1114                 if (!capable(CAP_SYS_ADMIN))
1115                         return -EPERM;
1116
1117                 if (!blk_queue_discard(q))
1118                         return -EOPNOTSUPP;
1119
1120                 /*
1121                  * We haven't replayed the journal, so we cannot use our
1122                  * block-bitmap-guided storage zapping commands.
1123                  */
1124                 if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
1125                         return -EROFS;
1126
1127                 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1128                     sizeof(range)))
1129                         return -EFAULT;
1130
1131                 ret = ext4_trim_fs(sb, &range);
1132                 if (ret < 0)
1133                         return ret;
1134
1135                 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1136                     sizeof(range)))
1137                         return -EFAULT;
1138
1139                 return 0;
1140         }
1141         case EXT4_IOC_PRECACHE_EXTENTS:
1142                 return ext4_ext_precache(inode);
1143
1144         case FS_IOC_SET_ENCRYPTION_POLICY:
1145                 if (!ext4_has_feature_encrypt(sb))
1146                         return -EOPNOTSUPP;
1147                 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
1148
1149         case FS_IOC_GET_ENCRYPTION_PWSALT: {
1150 #ifdef CONFIG_FS_ENCRYPTION
1151                 int err, err2;
1152                 struct ext4_sb_info *sbi = EXT4_SB(sb);
1153                 handle_t *handle;
1154
1155                 if (!ext4_has_feature_encrypt(sb))
1156                         return -EOPNOTSUPP;
1157                 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
1158                         err = mnt_want_write_file(filp);
1159                         if (err)
1160                                 return err;
1161                         handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
1162                         if (IS_ERR(handle)) {
1163                                 err = PTR_ERR(handle);
1164                                 goto pwsalt_err_exit;
1165                         }
1166                         err = ext4_journal_get_write_access(handle, sbi->s_sbh);
1167                         if (err)
1168                                 goto pwsalt_err_journal;
1169                         lock_buffer(sbi->s_sbh);
1170                         generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
1171                         ext4_superblock_csum_set(sb);
1172                         unlock_buffer(sbi->s_sbh);
1173                         err = ext4_handle_dirty_metadata(handle, NULL,
1174                                                          sbi->s_sbh);
1175                 pwsalt_err_journal:
1176                         err2 = ext4_journal_stop(handle);
1177                         if (err2 && !err)
1178                                 err = err2;
1179                 pwsalt_err_exit:
1180                         mnt_drop_write_file(filp);
1181                         if (err)
1182                                 return err;
1183                 }
1184                 if (copy_to_user((void __user *) arg,
1185                                  sbi->s_es->s_encrypt_pw_salt, 16))
1186                         return -EFAULT;
1187                 return 0;
1188 #else
1189                 return -EOPNOTSUPP;
1190 #endif
1191         }
1192         case FS_IOC_GET_ENCRYPTION_POLICY:
1193                 if (!ext4_has_feature_encrypt(sb))
1194                         return -EOPNOTSUPP;
1195                 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1196
1197         case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1198                 if (!ext4_has_feature_encrypt(sb))
1199                         return -EOPNOTSUPP;
1200                 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1201
1202         case FS_IOC_ADD_ENCRYPTION_KEY:
1203                 if (!ext4_has_feature_encrypt(sb))
1204                         return -EOPNOTSUPP;
1205                 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1206
1207         case FS_IOC_REMOVE_ENCRYPTION_KEY:
1208                 if (!ext4_has_feature_encrypt(sb))
1209                         return -EOPNOTSUPP;
1210                 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1211
1212         case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1213                 if (!ext4_has_feature_encrypt(sb))
1214                         return -EOPNOTSUPP;
1215                 return fscrypt_ioctl_remove_key_all_users(filp,
1216                                                           (void __user *)arg);
1217         case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1218                 if (!ext4_has_feature_encrypt(sb))
1219                         return -EOPNOTSUPP;
1220                 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1221
1222         case FS_IOC_GET_ENCRYPTION_NONCE:
1223                 if (!ext4_has_feature_encrypt(sb))
1224                         return -EOPNOTSUPP;
1225                 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
1226
1227         case EXT4_IOC_CLEAR_ES_CACHE:
1228         {
1229                 if (!inode_owner_or_capable(inode))
1230                         return -EACCES;
1231                 ext4_clear_inode_es(inode);
1232                 return 0;
1233         }
1234
1235         case EXT4_IOC_GETSTATE:
1236         {
1237                 __u32   state = 0;
1238
1239                 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1240                         state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1241                 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1242                         state |= EXT4_STATE_FLAG_NEW;
1243                 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1244                         state |= EXT4_STATE_FLAG_NEWENTRY;
1245                 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1246                         state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1247
1248                 return put_user(state, (__u32 __user *) arg);
1249         }
1250
1251         case EXT4_IOC_GET_ES_CACHE:
1252                 return ext4_ioctl_get_es_cache(filp, arg);
1253
1254         case FS_IOC_FSGETXATTR:
1255         {
1256                 struct fsxattr fa;
1257
1258                 ext4_fill_fsxattr(inode, &fa);
1259
1260                 if (copy_to_user((struct fsxattr __user *)arg,
1261                                  &fa, sizeof(fa)))
1262                         return -EFAULT;
1263                 return 0;
1264         }
1265         case FS_IOC_FSSETXATTR:
1266         {
1267                 struct fsxattr fa, old_fa;
1268                 int err;
1269
1270                 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
1271                                    sizeof(fa)))
1272                         return -EFAULT;
1273
1274                 /* Make sure caller has proper permission */
1275                 if (!inode_owner_or_capable(inode))
1276                         return -EACCES;
1277
1278                 if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
1279                         return -EOPNOTSUPP;
1280
1281                 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
1282                 if (ext4_mask_flags(inode->i_mode, flags) != flags)
1283                         return -EOPNOTSUPP;
1284
1285                 err = mnt_want_write_file(filp);
1286                 if (err)
1287                         return err;
1288
1289                 inode_lock(inode);
1290                 ext4_fill_fsxattr(inode, &old_fa);
1291                 err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
1292                 if (err)
1293                         goto out;
1294                 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
1295                          (flags & EXT4_FL_XFLAG_VISIBLE);
1296                 err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags);
1297                 if (err)
1298                         goto out;
1299                 err = ext4_ioctl_setflags(inode, flags);
1300                 if (err)
1301                         goto out;
1302                 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
1303 out:
1304                 inode_unlock(inode);
1305                 mnt_drop_write_file(filp);
1306                 return err;
1307         }
1308         case EXT4_IOC_SHUTDOWN:
1309                 return ext4_shutdown(sb, arg);
1310
1311         case FS_IOC_ENABLE_VERITY:
1312                 if (!ext4_has_feature_verity(sb))
1313                         return -EOPNOTSUPP;
1314                 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1315
1316         case FS_IOC_MEASURE_VERITY:
1317                 if (!ext4_has_feature_verity(sb))
1318                         return -EOPNOTSUPP;
1319                 return fsverity_ioctl_measure(filp, (void __user *)arg);
1320
1321         default:
1322                 return -ENOTTY;
1323         }
1324 }
1325
1326 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1327 {
1328         return __ext4_ioctl(filp, cmd, arg);
1329 }
1330
1331 #ifdef CONFIG_COMPAT
1332 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1333 {
1334         /* These are just misnamed, they actually get/put from/to user an int */
1335         switch (cmd) {
1336         case FS_IOC32_GETFLAGS:
1337                 cmd = FS_IOC_GETFLAGS;
1338                 break;
1339         case FS_IOC32_SETFLAGS:
1340                 cmd = FS_IOC_SETFLAGS;
1341                 break;
1342         case EXT4_IOC32_GETVERSION:
1343                 cmd = EXT4_IOC_GETVERSION;
1344                 break;
1345         case EXT4_IOC32_SETVERSION:
1346                 cmd = EXT4_IOC_SETVERSION;
1347                 break;
1348         case EXT4_IOC32_GROUP_EXTEND:
1349                 cmd = EXT4_IOC_GROUP_EXTEND;
1350                 break;
1351         case EXT4_IOC32_GETVERSION_OLD:
1352                 cmd = EXT4_IOC_GETVERSION_OLD;
1353                 break;
1354         case EXT4_IOC32_SETVERSION_OLD:
1355                 cmd = EXT4_IOC_SETVERSION_OLD;
1356                 break;
1357         case EXT4_IOC32_GETRSVSZ:
1358                 cmd = EXT4_IOC_GETRSVSZ;
1359                 break;
1360         case EXT4_IOC32_SETRSVSZ:
1361                 cmd = EXT4_IOC_SETRSVSZ;
1362                 break;
1363         case EXT4_IOC32_GROUP_ADD: {
1364                 struct compat_ext4_new_group_input __user *uinput;
1365                 struct ext4_new_group_data input;
1366                 int err;
1367
1368                 uinput = compat_ptr(arg);
1369                 err = get_user(input.group, &uinput->group);
1370                 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1371                 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1372                 err |= get_user(input.inode_table, &uinput->inode_table);
1373                 err |= get_user(input.blocks_count, &uinput->blocks_count);
1374                 err |= get_user(input.reserved_blocks,
1375                                 &uinput->reserved_blocks);
1376                 if (err)
1377                         return -EFAULT;
1378                 return ext4_ioctl_group_add(file, &input);
1379         }
1380         case EXT4_IOC_MOVE_EXT:
1381         case EXT4_IOC_RESIZE_FS:
1382         case FITRIM:
1383         case EXT4_IOC_PRECACHE_EXTENTS:
1384         case FS_IOC_SET_ENCRYPTION_POLICY:
1385         case FS_IOC_GET_ENCRYPTION_PWSALT:
1386         case FS_IOC_GET_ENCRYPTION_POLICY:
1387         case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1388         case FS_IOC_ADD_ENCRYPTION_KEY:
1389         case FS_IOC_REMOVE_ENCRYPTION_KEY:
1390         case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1391         case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1392         case FS_IOC_GET_ENCRYPTION_NONCE:
1393         case EXT4_IOC_SHUTDOWN:
1394         case FS_IOC_GETFSMAP:
1395         case FS_IOC_ENABLE_VERITY:
1396         case FS_IOC_MEASURE_VERITY:
1397         case EXT4_IOC_CLEAR_ES_CACHE:
1398         case EXT4_IOC_GETSTATE:
1399         case EXT4_IOC_GET_ES_CACHE:
1400         case FS_IOC_FSGETXATTR:
1401         case FS_IOC_FSSETXATTR:
1402                 break;
1403         default:
1404                 return -ENOIOCTLCMD;
1405         }
1406         return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1407 }
1408 #endif