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 static void 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
 170         /* Protect extent tree against block allocations via delalloc */
 171         ext4_double_down_write_data_sem(inode, inode_bl);
 172
 173         if (is_bad_inode(inode_bl) || !S_ISREG(inode_bl->i_mode)) {
 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                 EXT4_I(inode_bl)->i_disksize = inode_bl->i_size;
 183                 inode_bl->i_mode = S_IFREG;
 184                 if (ext4_has_feature_extents(sb)) {
 185                         ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
 186                         ext4_ext_tree_init(handle, inode_bl);
 187                 } else
 188                         memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
 189         }
 190
 191         err = dquot_initialize(inode);
 192         if (err)
 193                 goto err_out1;
 194
 195         size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
 196         size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
 197         diff = size - size_bl;
 198         swap_inode_data(inode, inode_bl);
 199
 200         inode->i_ctime = inode_bl->i_ctime = current_time(inode);
 201
 202         inode->i_generation = prandom_u32();
 203         inode_bl->i_generation = prandom_u32();
 204         reset_inode_seed(inode);
 205         reset_inode_seed(inode_bl);
 206
 207         ext4_discard_preallocations(inode);
 208
 209         err = ext4_mark_inode_dirty(handle, inode);
 210         if (err < 0) {
 211                 /* No need to update quota information. */
 212                 ext4_warning(inode->i_sb,
 213                         "couldn't mark inode #%lu dirty (err %d)",
 214                         inode->i_ino, err);
 215                 /* Revert all changes: */
 216                 swap_inode_data(inode, inode_bl);
 217                 ext4_mark_inode_dirty(handle, inode);
 218                 goto err_out1;
 219         }
 220
 221         blocks = inode_bl->i_blocks;
 222         bytes = inode_bl->i_bytes;
 223         inode_bl->i_blocks = inode->i_blocks;
 224         inode_bl->i_bytes = inode->i_bytes;
 225         err = ext4_mark_inode_dirty(handle, inode_bl);
 226         if (err < 0) {
 227                 /* No need to update quota information. */
 228                 ext4_warning(inode_bl->i_sb,
 229                         "couldn't mark inode #%lu dirty (err %d)",
 230                         inode_bl->i_ino, err);
 231                 goto revert;
 232         }
 233
 234         /* Bootloader inode should not be counted into quota information. */
 235         if (diff > 0)
 236                 dquot_free_space(inode, diff);
 237         else
 238                 err = dquot_alloc_space(inode, -1 * diff);
 239
 240         if (err < 0) {
 241 revert:
 242                 /* Revert all changes: */
 243                 inode_bl->i_blocks = blocks;
 244                 inode_bl->i_bytes = bytes;
 245                 swap_inode_data(inode, inode_bl);
 246                 ext4_mark_inode_dirty(handle, inode);
 247                 ext4_mark_inode_dirty(handle, inode_bl);
 248         }
 249
 250 err_out1:
 251         ext4_journal_stop(handle);
 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 int ext4_ioctl_setflags(struct inode *inode,
 298                                unsigned int flags)
 299 {
 300         struct ext4_inode_info *ei = EXT4_I(inode);
 301         handle_t *handle = NULL;
 302         int err = -EPERM, migrate = 0;
 303         struct ext4_iloc iloc;
 304         unsigned int oldflags, mask, i;
 305         unsigned int jflag;
 306         struct super_block *sb = inode->i_sb;
 307
 308         /* Is it quota file? Do not allow user to mess with it */
 309         if (ext4_is_quota_file(inode))
 310                 goto flags_out;
 311
 312         oldflags = ei->i_flags;
 313
 314         /* The JOURNAL_DATA flag is modifiable only by root */
 315         jflag = flags & EXT4_JOURNAL_DATA_FL;
 316
 317         err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
 318         if (err)
 319                 goto flags_out;
 320
 321         /*
 322          * The JOURNAL_DATA flag can only be changed by
 323          * the relevant capability.
 324          */
 325         if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
 326                 if (!capable(CAP_SYS_RESOURCE))
 327                         goto flags_out;
 328         }
 329         if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
 330                 migrate = 1;
 331
 332         if (flags & EXT4_EOFBLOCKS_FL) {
 333                 /* we don't support adding EOFBLOCKS flag */
 334                 if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
 335                         err = -EOPNOTSUPP;
 336                         goto flags_out;
 337                 }
 338         } else if (oldflags & EXT4_EOFBLOCKS_FL) {
 339                 err = ext4_truncate(inode);
 340                 if (err)
 341                         goto flags_out;
 342         }
 343
 344         if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
 345                 if (!ext4_has_feature_casefold(sb)) {
 346                         err = -EOPNOTSUPP;
 347                         goto flags_out;
 348                 }
 349
 350                 if (!S_ISDIR(inode->i_mode)) {
 351                         err = -ENOTDIR;
 352                         goto flags_out;
 353                 }
 354
 355                 if (!ext4_empty_dir(inode)) {
 356                         err = -ENOTEMPTY;
 357                         goto flags_out;
 358                 }
 359         }
 360
 361         /*
 362          * Wait for all pending directio and then flush all the dirty pages
 363          * for this file.  The flush marks all the pages readonly, so any
 364          * subsequent attempt to write to the file (particularly mmap pages)
 365          * will come through the filesystem and fail.
 366          */
 367         if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
 368             (flags & EXT4_IMMUTABLE_FL)) {
 369                 inode_dio_wait(inode);
 370                 err = filemap_write_and_wait(inode->i_mapping);
 371                 if (err)
 372                         goto flags_out;
 373         }
 374
 375         handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
 376         if (IS_ERR(handle)) {
 377                 err = PTR_ERR(handle);
 378                 goto flags_out;
 379         }
 380         if (IS_SYNC(inode))
 381                 ext4_handle_sync(handle);
 382         err = ext4_reserve_inode_write(handle, inode, &iloc);
 383         if (err)
 384                 goto flags_err;
 385
 386         for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
 387                 if (!(mask & EXT4_FL_USER_MODIFIABLE))
 388                         continue;
 389                 /* These flags get special treatment later */
 390                 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
 391                         continue;
 392                 if (mask & flags)
 393                         ext4_set_inode_flag(inode, i);
 394                 else
 395                         ext4_clear_inode_flag(inode, i);
 396         }
 397
 398         ext4_set_inode_flags(inode);
 399         inode->i_ctime = current_time(inode);
 400
 401         err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 402 flags_err:
 403         ext4_journal_stop(handle);
 404         if (err)
 405                 goto flags_out;
 406
 407         if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
 408                 /*
 409                  * Changes to the journaling mode can cause unsafe changes to
 410                  * S_DAX if we are using the DAX mount option.
 411                  */
 412                 if (test_opt(inode->i_sb, DAX)) {
 413                         err = -EBUSY;
 414                         goto flags_out;
 415                 }
 416
 417                 err = ext4_change_inode_journal_flag(inode, jflag);
 418                 if (err)
 419                         goto flags_out;
 420         }
 421         if (migrate) {
 422                 if (flags & EXT4_EXTENTS_FL)
 423                         err = ext4_ext_migrate(inode);
 424                 else
 425                         err = ext4_ind_migrate(inode);
 426         }
 427
 428 flags_out:
 429         return err;
 430 }
 431
 432 #ifdef CONFIG_QUOTA
 433 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
 434 {
 435         struct inode *inode = file_inode(filp);
 436         struct super_block *sb = inode->i_sb;
 437         struct ext4_inode_info *ei = EXT4_I(inode);
 438         int err, rc;
 439         handle_t *handle;
 440         kprojid_t kprojid;
 441         struct ext4_iloc iloc;
 442         struct ext4_inode *raw_inode;
 443         struct dquot *transfer_to[MAXQUOTAS] = { };
 444
 445         if (!ext4_has_feature_project(sb)) {
 446                 if (projid != EXT4_DEF_PROJID)
 447                         return -EOPNOTSUPP;
 448                 else
 449                         return 0;
 450         }
 451
 452         if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
 453                 return -EOPNOTSUPP;
 454
 455         kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
 456
 457         if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
 458                 return 0;
 459
 460         err = -EPERM;
 461         /* Is it quota file? Do not allow user to mess with it */
 462         if (ext4_is_quota_file(inode))
 463                 return err;
 464
 465         err = dquot_initialize(inode);
 466         if (err)
 467                 return err;
 468
 469         err = ext4_get_inode_loc(inode, &iloc);
 470         if (err)
 471                 return err;
 472
 473         raw_inode = ext4_raw_inode(&iloc);
 474         if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
 475                 err = ext4_expand_extra_isize(inode,
 476                                               EXT4_SB(sb)->s_want_extra_isize,
 477                                               &iloc);
 478                 if (err)
 479                         return err;
 480         } else {
 481                 brelse(iloc.bh);
 482         }
 483
 484         handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
 485                 EXT4_QUOTA_INIT_BLOCKS(sb) +
 486                 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
 487         if (IS_ERR(handle))
 488                 return PTR_ERR(handle);
 489
 490         err = ext4_reserve_inode_write(handle, inode, &iloc);
 491         if (err)
 492                 goto out_stop;
 493
 494         transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
 495         if (!IS_ERR(transfer_to[PRJQUOTA])) {
 496
 497                 /* __dquot_transfer() calls back ext4_get_inode_usage() which
 498                  * counts xattr inode references.
 499                  */
 500                 down_read(&EXT4_I(inode)->xattr_sem);
 501                 err = __dquot_transfer(inode, transfer_to);
 502                 up_read(&EXT4_I(inode)->xattr_sem);
 503                 dqput(transfer_to[PRJQUOTA]);
 504                 if (err)
 505                         goto out_dirty;
 506         }
 507
 508         EXT4_I(inode)->i_projid = kprojid;
 509         inode->i_ctime = current_time(inode);
 510 out_dirty:
 511         rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
 512         if (!err)
 513                 err = rc;
 514 out_stop:
 515         ext4_journal_stop(handle);
 516         return err;
 517 }
 518 #else
 519 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
 520 {
 521         if (projid != EXT4_DEF_PROJID)
 522                 return -EOPNOTSUPP;
 523         return 0;
 524 }
 525 #endif
 526
 527 /* Transfer internal flags to xflags */
 528 static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
 529 {
 530         __u32 xflags = 0;
 531
 532         if (iflags & EXT4_SYNC_FL)
 533                 xflags |= FS_XFLAG_SYNC;
 534         if (iflags & EXT4_IMMUTABLE_FL)
 535                 xflags |= FS_XFLAG_IMMUTABLE;
 536         if (iflags & EXT4_APPEND_FL)
 537                 xflags |= FS_XFLAG_APPEND;
 538         if (iflags & EXT4_NODUMP_FL)
 539                 xflags |= FS_XFLAG_NODUMP;
 540         if (iflags & EXT4_NOATIME_FL)
 541                 xflags |= FS_XFLAG_NOATIME;
 542         if (iflags & EXT4_PROJINHERIT_FL)
 543                 xflags |= FS_XFLAG_PROJINHERIT;
 544         return xflags;
 545 }
 546
 547 #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
 548                                   FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
 549                                   FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
 550
 551 /* Transfer xflags flags to internal */
 552 static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
 553 {
 554         unsigned long iflags = 0;
 555
 556         if (xflags & FS_XFLAG_SYNC)
 557                 iflags |= EXT4_SYNC_FL;
 558         if (xflags & FS_XFLAG_IMMUTABLE)
 559                 iflags |= EXT4_IMMUTABLE_FL;
 560         if (xflags & FS_XFLAG_APPEND)
 561                 iflags |= EXT4_APPEND_FL;
 562         if (xflags & FS_XFLAG_NODUMP)
 563                 iflags |= EXT4_NODUMP_FL;
 564         if (xflags & FS_XFLAG_NOATIME)
 565                 iflags |= EXT4_NOATIME_FL;
 566         if (xflags & FS_XFLAG_PROJINHERIT)
 567                 iflags |= EXT4_PROJINHERIT_FL;
 568
 569         return iflags;
 570 }
 571
 572 static int ext4_shutdown(struct super_block *sb, unsigned long arg)
 573 {
 574         struct ext4_sb_info *sbi = EXT4_SB(sb);
 575         __u32 flags;
 576         struct super_block *ret;
 577
 578         if (!capable(CAP_SYS_ADMIN))
 579                 return -EPERM;
 580
 581         if (get_user(flags, (__u32 __user *)arg))
 582                 return -EFAULT;
 583
 584         if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
 585                 return -EINVAL;
 586
 587         if (ext4_forced_shutdown(sbi))
 588                 return 0;
 589
 590         ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
 591         trace_ext4_shutdown(sb, flags);
 592
 593         switch (flags) {
 594         case EXT4_GOING_FLAGS_DEFAULT:
 595                 ret = freeze_bdev(sb->s_bdev);
 596                 if (IS_ERR(ret))
 597                         return PTR_ERR(ret);
 598                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 599                 thaw_bdev(sb->s_bdev, sb);
 600                 break;
 601         case EXT4_GOING_FLAGS_LOGFLUSH:
 602                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 603                 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
 604                         (void) ext4_force_commit(sb);
 605                         jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
 606                 }
 607                 break;
 608         case EXT4_GOING_FLAGS_NOLOGFLUSH:
 609                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 610                 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
 611                         jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
 612                 break;
 613         default:
 614                 return -EINVAL;
 615         }
 616         clear_opt(sb, DISCARD);
 617         return 0;
 618 }
 619
 620 struct getfsmap_info {
 621         struct super_block      *gi_sb;
 622         struct fsmap_head __user *gi_data;
 623         unsigned int            gi_idx;
 624         __u32                   gi_last_flags;
 625 };
 626
 627 static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
 628 {
 629         struct getfsmap_info *info = priv;
 630         struct fsmap fm;
 631
 632         trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
 633
 634         info->gi_last_flags = xfm->fmr_flags;
 635         ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
 636         if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
 637                         sizeof(struct fsmap)))
 638                 return -EFAULT;
 639
 640         return 0;
 641 }
 642
 643 static int ext4_ioc_getfsmap(struct super_block *sb,
 644                              struct fsmap_head __user *arg)
 645 {
 646         struct getfsmap_info info = { NULL };
 647         struct ext4_fsmap_head xhead = {0};
 648         struct fsmap_head head;
 649         bool aborted = false;
 650         int error;
 651
 652         if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
 653                 return -EFAULT;
 654         if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
 655             memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
 656                        sizeof(head.fmh_keys[0].fmr_reserved)) ||
 657             memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
 658                        sizeof(head.fmh_keys[1].fmr_reserved)))
 659                 return -EINVAL;
 660         /*
 661          * ext4 doesn't report file extents at all, so the only valid
 662          * file offsets are the magic ones (all zeroes or all ones).
 663          */
 664         if (head.fmh_keys[0].fmr_offset ||
 665             (head.fmh_keys[1].fmr_offset != 0 &&
 666              head.fmh_keys[1].fmr_offset != -1ULL))
 667                 return -EINVAL;
 668
 669         xhead.fmh_iflags = head.fmh_iflags;
 670         xhead.fmh_count = head.fmh_count;
 671         ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
 672         ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
 673
 674         trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
 675         trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
 676
 677         info.gi_sb = sb;
 678         info.gi_data = arg;
 679         error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
 680         if (error == EXT4_QUERY_RANGE_ABORT) {
 681                 error = 0;
 682                 aborted = true;
 683         } else if (error)
 684                 return error;
 685
 686         /* If we didn't abort, set the "last" flag in the last fmx */
 687         if (!aborted && info.gi_idx) {
 688                 info.gi_last_flags |= FMR_OF_LAST;
 689                 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
 690                                  &info.gi_last_flags,
 691                                  sizeof(info.gi_last_flags)))
 692                         return -EFAULT;
 693         }
 694
 695         /* copy back header */
 696         head.fmh_entries = xhead.fmh_entries;
 697         head.fmh_oflags = xhead.fmh_oflags;
 698         if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
 699                 return -EFAULT;
 700
 701         return 0;
 702 }
 703
 704 static long ext4_ioctl_group_add(struct file *file,
 705                                  struct ext4_new_group_data *input)
 706 {
 707         struct super_block *sb = file_inode(file)->i_sb;
 708         int err, err2=0;
 709
 710         err = ext4_resize_begin(sb);
 711         if (err)
 712                 return err;
 713
 714         if (ext4_has_feature_bigalloc(sb)) {
 715                 ext4_msg(sb, KERN_ERR,
 716                          "Online resizing not supported with bigalloc");
 717                 err = -EOPNOTSUPP;
 718                 goto group_add_out;
 719         }
 720
 721         err = mnt_want_write_file(file);
 722         if (err)
 723                 goto group_add_out;
 724
 725         err = ext4_group_add(sb, input);
 726         if (EXT4_SB(sb)->s_journal) {
 727                 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
 728                 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
 729                 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
 730         }
 731         if (err == 0)
 732                 err = err2;
 733         mnt_drop_write_file(file);
 734         if (!err && ext4_has_group_desc_csum(sb) &&
 735             test_opt(sb, INIT_INODE_TABLE))
 736                 err = ext4_register_li_request(sb, input->group);
 737 group_add_out:
 738         ext4_resize_end(sb);
 739         return err;
 740 }
 741
 742 static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
 743 {
 744         struct ext4_inode_info *ei = EXT4_I(inode);
 745
 746         simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags &
 747                                                       EXT4_FL_USER_VISIBLE));
 748
 749         if (ext4_has_feature_project(inode->i_sb))
 750                 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
 751 }
 752
 753 /* copied from fs/ioctl.c */
 754 static int fiemap_check_ranges(struct super_block *sb,
 755                                u64 start, u64 len, u64 *new_len)
 756 {
 757         u64 maxbytes = (u64) sb->s_maxbytes;
 758
 759         *new_len = len;
 760
 761         if (len == 0)
 762                 return -EINVAL;
 763
 764         if (start > maxbytes)
 765                 return -EFBIG;
 766
 767         /*
 768          * Shrink request scope to what the fs can actually handle.
 769          */
 770         if (len > maxbytes || (maxbytes - len) < start)
 771                 *new_len = maxbytes - start;
 772
 773         return 0;
 774 }
 775
 776 /* So that the fiemap access checks can't overflow on 32 bit machines. */
 777 #define FIEMAP_MAX_EXTENTS      (UINT_MAX / sizeof(struct fiemap_extent))
 778
 779 static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
 780 {
 781         struct fiemap fiemap;
 782         struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
 783         struct fiemap_extent_info fieinfo = { 0, };
 784         struct inode *inode = file_inode(filp);
 785         struct super_block *sb = inode->i_sb;
 786         u64 len;
 787         int error;
 788
 789         if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
 790                 return -EFAULT;
 791
 792         if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
 793                 return -EINVAL;
 794
 795         error = fiemap_check_ranges(sb, fiemap.fm_start, fiemap.fm_length,
 796                                     &len);
 797         if (error)
 798                 return error;
 799
 800         fieinfo.fi_flags = fiemap.fm_flags;
 801         fieinfo.fi_extents_max = fiemap.fm_extent_count;
 802         fieinfo.fi_extents_start = ufiemap->fm_extents;
 803
 804         if (fiemap.fm_extent_count != 0 &&
 805             !access_ok(fieinfo.fi_extents_start,
 806                        fieinfo.fi_extents_max * sizeof(struct fiemap_extent)))
 807                 return -EFAULT;
 808
 809         if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC)
 810                 filemap_write_and_wait(inode->i_mapping);
 811
 812         error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start, len);
 813         fiemap.fm_flags = fieinfo.fi_flags;
 814         fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
 815         if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
 816                 error = -EFAULT;
 817
 818         return error;
 819 }
 820
 821 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 822 {
 823         struct inode *inode = file_inode(filp);
 824         struct super_block *sb = inode->i_sb;
 825         struct ext4_inode_info *ei = EXT4_I(inode);
 826         unsigned int flags;
 827
 828         ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
 829
 830         switch (cmd) {
 831         case FS_IOC_GETFSMAP:
 832                 return ext4_ioc_getfsmap(sb, (void __user *)arg);
 833         case EXT4_IOC_GETFLAGS:
 834                 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
 835                 if (S_ISREG(inode->i_mode))
 836                         flags &= ~EXT4_PROJINHERIT_FL;
 837                 return put_user(flags, (int __user *) arg);
 838         case EXT4_IOC_SETFLAGS: {
 839                 int err;
 840
 841                 if (!inode_owner_or_capable(inode))
 842                         return -EACCES;
 843
 844                 if (get_user(flags, (int __user *) arg))
 845                         return -EFAULT;
 846
 847                 if (flags & ~EXT4_FL_USER_VISIBLE)
 848                         return -EOPNOTSUPP;
 849                 /*
 850                  * chattr(1) grabs flags via GETFLAGS, modifies the result and
 851                  * passes that to SETFLAGS. So we cannot easily make SETFLAGS
 852                  * more restrictive than just silently masking off visible but
 853                  * not settable flags as we always did.
 854                  */
 855                 flags &= EXT4_FL_USER_MODIFIABLE;
 856                 if (ext4_mask_flags(inode->i_mode, flags) != flags)
 857                         return -EOPNOTSUPP;
 858
 859                 err = mnt_want_write_file(filp);
 860                 if (err)
 861                         return err;
 862
 863                 inode_lock(inode);
 864                 err = ext4_ioctl_check_immutable(inode,
 865                                 from_kprojid(&init_user_ns, ei->i_projid),
 866                                 flags);
 867                 if (!err)
 868                         err = ext4_ioctl_setflags(inode, flags);
 869                 inode_unlock(inode);
 870                 mnt_drop_write_file(filp);
 871                 return err;
 872         }
 873         case EXT4_IOC_GETVERSION:
 874         case EXT4_IOC_GETVERSION_OLD:
 875                 return put_user(inode->i_generation, (int __user *) arg);
 876         case EXT4_IOC_SETVERSION:
 877         case EXT4_IOC_SETVERSION_OLD: {
 878                 handle_t *handle;
 879                 struct ext4_iloc iloc;
 880                 __u32 generation;
 881                 int err;
 882
 883                 if (!inode_owner_or_capable(inode))
 884                         return -EPERM;
 885
 886                 if (ext4_has_metadata_csum(inode->i_sb)) {
 887                         ext4_warning(sb, "Setting inode version is not "
 888                                      "supported with metadata_csum enabled.");
 889                         return -ENOTTY;
 890                 }
 891
 892                 err = mnt_want_write_file(filp);
 893                 if (err)
 894                         return err;
 895                 if (get_user(generation, (int __user *) arg)) {
 896                         err = -EFAULT;
 897                         goto setversion_out;
 898                 }
 899
 900                 inode_lock(inode);
 901                 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
 902                 if (IS_ERR(handle)) {
 903                         err = PTR_ERR(handle);
 904                         goto unlock_out;
 905                 }
 906                 err = ext4_reserve_inode_write(handle, inode, &iloc);
 907                 if (err == 0) {
 908                         inode->i_ctime = current_time(inode);
 909                         inode->i_generation = generation;
 910                         err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 911                 }
 912                 ext4_journal_stop(handle);
 913
 914 unlock_out:
 915                 inode_unlock(inode);
 916 setversion_out:
 917                 mnt_drop_write_file(filp);
 918                 return err;
 919         }
 920         case EXT4_IOC_GROUP_EXTEND: {
 921                 ext4_fsblk_t n_blocks_count;
 922                 int err, err2=0;
 923
 924                 err = ext4_resize_begin(sb);
 925                 if (err)
 926                         return err;
 927
 928                 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
 929                         err = -EFAULT;
 930                         goto group_extend_out;
 931                 }
 932
 933                 if (ext4_has_feature_bigalloc(sb)) {
 934                         ext4_msg(sb, KERN_ERR,
 935                                  "Online resizing not supported with bigalloc");
 936                         err = -EOPNOTSUPP;
 937                         goto group_extend_out;
 938                 }
 939
 940                 err = mnt_want_write_file(filp);
 941                 if (err)
 942                         goto group_extend_out;
 943
 944                 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
 945                 if (EXT4_SB(sb)->s_journal) {
 946                         jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
 947                         err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
 948                         jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
 949                 }
 950                 if (err == 0)
 951                         err = err2;
 952                 mnt_drop_write_file(filp);
 953 group_extend_out:
 954                 ext4_resize_end(sb);
 955                 return err;
 956         }
 957
 958         case EXT4_IOC_MOVE_EXT: {
 959                 struct move_extent me;
 960                 struct fd donor;
 961                 int err;
 962
 963                 if (!(filp->f_mode & FMODE_READ) ||
 964                     !(filp->f_mode & FMODE_WRITE))
 965                         return -EBADF;
 966
 967                 if (copy_from_user(&me,
 968                         (struct move_extent __user *)arg, sizeof(me)))
 969                         return -EFAULT;
 970                 me.moved_len = 0;
 971
 972                 donor = fdget(me.donor_fd);
 973                 if (!donor.file)
 974                         return -EBADF;
 975
 976                 if (!(donor.file->f_mode & FMODE_WRITE)) {
 977                         err = -EBADF;
 978                         goto mext_out;
 979                 }
 980
 981                 if (ext4_has_feature_bigalloc(sb)) {
 982                         ext4_msg(sb, KERN_ERR,
 983                                  "Online defrag not supported with bigalloc");
 984                         err = -EOPNOTSUPP;
 985                         goto mext_out;
 986                 } else if (IS_DAX(inode)) {
 987                         ext4_msg(sb, KERN_ERR,
 988                                  "Online defrag not supported with DAX");
 989                         err = -EOPNOTSUPP;
 990                         goto mext_out;
 991                 }
 992
 993                 err = mnt_want_write_file(filp);
 994                 if (err)
 995                         goto mext_out;
 996
 997                 err = ext4_move_extents(filp, donor.file, me.orig_start,
 998                                         me.donor_start, me.len, &me.moved_len);
 999                 mnt_drop_write_file(filp);
1000
1001                 if (copy_to_user((struct move_extent __user *)arg,
1002                                  &me, sizeof(me)))
1003                         err = -EFAULT;
1004 mext_out:
1005                 fdput(donor);
1006                 return err;
1007         }
1008
1009         case EXT4_IOC_GROUP_ADD: {
1010                 struct ext4_new_group_data input;
1011
1012                 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
1013                                 sizeof(input)))
1014                         return -EFAULT;
1015
1016                 return ext4_ioctl_group_add(filp, &input);
1017         }
1018
1019         case EXT4_IOC_MIGRATE:
1020         {
1021                 int err;
1022                 if (!inode_owner_or_capable(inode))
1023                         return -EACCES;
1024
1025                 err = mnt_want_write_file(filp);
1026                 if (err)
1027                         return err;
1028                 /*
1029                  * inode_mutex prevent write and truncate on the file.
1030                  * Read still goes through. We take i_data_sem in
1031                  * ext4_ext_swap_inode_data before we switch the
1032                  * inode format to prevent read.
1033                  */
1034                 inode_lock((inode));
1035                 err = ext4_ext_migrate(inode);
1036                 inode_unlock((inode));
1037                 mnt_drop_write_file(filp);
1038                 return err;
1039         }
1040
1041         case EXT4_IOC_ALLOC_DA_BLKS:
1042         {
1043                 int err;
1044                 if (!inode_owner_or_capable(inode))
1045                         return -EACCES;
1046
1047                 err = mnt_want_write_file(filp);
1048                 if (err)
1049                         return err;
1050                 err = ext4_alloc_da_blocks(inode);
1051                 mnt_drop_write_file(filp);
1052                 return err;
1053         }
1054
1055         case EXT4_IOC_SWAP_BOOT:
1056         {
1057                 int err;
1058                 if (!(filp->f_mode & FMODE_WRITE))
1059                         return -EBADF;
1060                 err = mnt_want_write_file(filp);
1061                 if (err)
1062                         return err;
1063                 err = swap_inode_boot_loader(sb, inode);
1064                 mnt_drop_write_file(filp);
1065                 return err;
1066         }
1067
1068         case EXT4_IOC_RESIZE_FS: {
1069                 ext4_fsblk_t n_blocks_count;
1070                 int err = 0, err2 = 0;
1071                 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
1072
1073                 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
1074                                    sizeof(__u64))) {
1075                         return -EFAULT;
1076                 }
1077
1078                 err = ext4_resize_begin(sb);
1079                 if (err)
1080                         return err;
1081
1082                 err = mnt_want_write_file(filp);
1083                 if (err)
1084                         goto resizefs_out;
1085
1086                 err = ext4_resize_fs(sb, n_blocks_count);
1087                 if (EXT4_SB(sb)->s_journal) {
1088                         jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1089                         err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
1090                         jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1091                 }
1092                 if (err == 0)
1093                         err = err2;
1094                 mnt_drop_write_file(filp);
1095                 if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
1096                     ext4_has_group_desc_csum(sb) &&
1097                     test_opt(sb, INIT_INODE_TABLE))
1098                         err = ext4_register_li_request(sb, o_group);
1099
1100 resizefs_out:
1101                 ext4_resize_end(sb);
1102                 return err;
1103         }
1104
1105         case FITRIM:
1106         {
1107                 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1108                 struct fstrim_range range;
1109                 int ret = 0;
1110
1111                 if (!capable(CAP_SYS_ADMIN))
1112                         return -EPERM;
1113
1114                 if (!blk_queue_discard(q))
1115                         return -EOPNOTSUPP;
1116
1117                 /*
1118                  * We haven't replayed the journal, so we cannot use our
1119                  * block-bitmap-guided storage zapping commands.
1120                  */
1121                 if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
1122                         return -EROFS;
1123
1124                 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1125                     sizeof(range)))
1126                         return -EFAULT;
1127
1128                 ret = ext4_trim_fs(sb, &range);
1129                 if (ret < 0)
1130                         return ret;
1131
1132                 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1133                     sizeof(range)))
1134                         return -EFAULT;
1135
1136                 return 0;
1137         }
1138         case EXT4_IOC_PRECACHE_EXTENTS:
1139                 return ext4_ext_precache(inode);
1140
1141         case EXT4_IOC_SET_ENCRYPTION_POLICY:
1142                 if (!ext4_has_feature_encrypt(sb))
1143                         return -EOPNOTSUPP;
1144                 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
1145
1146         case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
1147 #ifdef CONFIG_FS_ENCRYPTION
1148                 int err, err2;
1149                 struct ext4_sb_info *sbi = EXT4_SB(sb);
1150                 handle_t *handle;
1151
1152                 if (!ext4_has_feature_encrypt(sb))
1153                         return -EOPNOTSUPP;
1154                 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
1155                         err = mnt_want_write_file(filp);
1156                         if (err)
1157                                 return err;
1158                         handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
1159                         if (IS_ERR(handle)) {
1160                                 err = PTR_ERR(handle);
1161                                 goto pwsalt_err_exit;
1162                         }
1163                         err = ext4_journal_get_write_access(handle, sbi->s_sbh);
1164                         if (err)
1165                                 goto pwsalt_err_journal;
1166                         lock_buffer(sbi->s_sbh);
1167                         generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
1168                         ext4_superblock_csum_set(sb);
1169                         unlock_buffer(sbi->s_sbh);
1170                         err = ext4_handle_dirty_metadata(handle, NULL,
1171                                                          sbi->s_sbh);
1172                 pwsalt_err_journal:
1173                         err2 = ext4_journal_stop(handle);
1174                         if (err2 && !err)
1175                                 err = err2;
1176                 pwsalt_err_exit:
1177                         mnt_drop_write_file(filp);
1178                         if (err)
1179                                 return err;
1180                 }
1181                 if (copy_to_user((void __user *) arg,
1182                                  sbi->s_es->s_encrypt_pw_salt, 16))
1183                         return -EFAULT;
1184                 return 0;
1185 #else
1186                 return -EOPNOTSUPP;
1187 #endif
1188         }
1189         case EXT4_IOC_GET_ENCRYPTION_POLICY:
1190                 if (!ext4_has_feature_encrypt(sb))
1191                         return -EOPNOTSUPP;
1192                 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1193
1194         case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1195                 if (!ext4_has_feature_encrypt(sb))
1196                         return -EOPNOTSUPP;
1197                 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1198
1199         case FS_IOC_ADD_ENCRYPTION_KEY:
1200                 if (!ext4_has_feature_encrypt(sb))
1201                         return -EOPNOTSUPP;
1202                 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1203
1204         case FS_IOC_REMOVE_ENCRYPTION_KEY:
1205                 if (!ext4_has_feature_encrypt(sb))
1206                         return -EOPNOTSUPP;
1207                 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1208
1209         case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1210                 if (!ext4_has_feature_encrypt(sb))
1211                         return -EOPNOTSUPP;
1212                 return fscrypt_ioctl_remove_key_all_users(filp,
1213                                                           (void __user *)arg);
1214         case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1215                 if (!ext4_has_feature_encrypt(sb))
1216                         return -EOPNOTSUPP;
1217                 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1218
1219         case EXT4_IOC_CLEAR_ES_CACHE:
1220         {
1221                 if (!inode_owner_or_capable(inode))
1222                         return -EACCES;
1223                 ext4_clear_inode_es(inode);
1224                 return 0;
1225         }
1226
1227         case EXT4_IOC_GETSTATE:
1228         {
1229                 __u32   state = 0;
1230
1231                 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1232                         state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1233                 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1234                         state |= EXT4_STATE_FLAG_NEW;
1235                 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1236                         state |= EXT4_STATE_FLAG_NEWENTRY;
1237                 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1238                         state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1239
1240                 return put_user(state, (__u32 __user *) arg);
1241         }
1242
1243         case EXT4_IOC_GET_ES_CACHE:
1244                 return ext4_ioctl_get_es_cache(filp, arg);
1245
1246         case EXT4_IOC_FSGETXATTR:
1247         {
1248                 struct fsxattr fa;
1249
1250                 ext4_fill_fsxattr(inode, &fa);
1251
1252                 if (copy_to_user((struct fsxattr __user *)arg,
1253                                  &fa, sizeof(fa)))
1254                         return -EFAULT;
1255                 return 0;
1256         }
1257         case EXT4_IOC_FSSETXATTR:
1258         {
1259                 struct fsxattr fa, old_fa;
1260                 int err;
1261
1262                 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
1263                                    sizeof(fa)))
1264                         return -EFAULT;
1265
1266                 /* Make sure caller has proper permission */
1267                 if (!inode_owner_or_capable(inode))
1268                         return -EACCES;
1269
1270                 if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
1271                         return -EOPNOTSUPP;
1272
1273                 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
1274                 if (ext4_mask_flags(inode->i_mode, flags) != flags)
1275                         return -EOPNOTSUPP;
1276
1277                 err = mnt_want_write_file(filp);
1278                 if (err)
1279                         return err;
1280
1281                 inode_lock(inode);
1282                 ext4_fill_fsxattr(inode, &old_fa);
1283                 err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
1284                 if (err)
1285                         goto out;
1286                 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
1287                          (flags & EXT4_FL_XFLAG_VISIBLE);
1288                 err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags);
1289                 if (err)
1290                         goto out;
1291                 err = ext4_ioctl_setflags(inode, flags);
1292                 if (err)
1293                         goto out;
1294                 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
1295 out:
1296                 inode_unlock(inode);
1297                 mnt_drop_write_file(filp);
1298                 return err;
1299         }
1300         case EXT4_IOC_SHUTDOWN:
1301                 return ext4_shutdown(sb, arg);
1302
1303         case FS_IOC_ENABLE_VERITY:
1304                 if (!ext4_has_feature_verity(sb))
1305                         return -EOPNOTSUPP;
1306                 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1307
1308         case FS_IOC_MEASURE_VERITY:
1309                 if (!ext4_has_feature_verity(sb))
1310                         return -EOPNOTSUPP;
1311                 return fsverity_ioctl_measure(filp, (void __user *)arg);
1312
1313         default:
1314                 return -ENOTTY;
1315         }
1316 }
1317
1318 #ifdef CONFIG_COMPAT
1319 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1320 {
1321         /* These are just misnamed, they actually get/put from/to user an int */
1322         switch (cmd) {
1323         case EXT4_IOC32_GETFLAGS:
1324                 cmd = EXT4_IOC_GETFLAGS;
1325                 break;
1326         case EXT4_IOC32_SETFLAGS:
1327                 cmd = EXT4_IOC_SETFLAGS;
1328                 break;
1329         case EXT4_IOC32_GETVERSION:
1330                 cmd = EXT4_IOC_GETVERSION;
1331                 break;
1332         case EXT4_IOC32_SETVERSION:
1333                 cmd = EXT4_IOC_SETVERSION;
1334                 break;
1335         case EXT4_IOC32_GROUP_EXTEND:
1336                 cmd = EXT4_IOC_GROUP_EXTEND;
1337                 break;
1338         case EXT4_IOC32_GETVERSION_OLD:
1339                 cmd = EXT4_IOC_GETVERSION_OLD;
1340                 break;
1341         case EXT4_IOC32_SETVERSION_OLD:
1342                 cmd = EXT4_IOC_SETVERSION_OLD;
1343                 break;
1344         case EXT4_IOC32_GETRSVSZ:
1345                 cmd = EXT4_IOC_GETRSVSZ;
1346                 break;
1347         case EXT4_IOC32_SETRSVSZ:
1348                 cmd = EXT4_IOC_SETRSVSZ;
1349                 break;
1350         case EXT4_IOC32_GROUP_ADD: {
1351                 struct compat_ext4_new_group_input __user *uinput;
1352                 struct ext4_new_group_data input;
1353                 int err;
1354
1355                 uinput = compat_ptr(arg);
1356                 err = get_user(input.group, &uinput->group);
1357                 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1358                 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1359                 err |= get_user(input.inode_table, &uinput->inode_table);
1360                 err |= get_user(input.blocks_count, &uinput->blocks_count);
1361                 err |= get_user(input.reserved_blocks,
1362                                 &uinput->reserved_blocks);
1363                 if (err)
1364                         return -EFAULT;
1365                 return ext4_ioctl_group_add(file, &input);
1366         }
1367         case EXT4_IOC_MOVE_EXT:
1368         case EXT4_IOC_RESIZE_FS:
1369         case EXT4_IOC_PRECACHE_EXTENTS:
1370         case EXT4_IOC_SET_ENCRYPTION_POLICY:
1371         case EXT4_IOC_GET_ENCRYPTION_PWSALT:
1372         case EXT4_IOC_GET_ENCRYPTION_POLICY:
1373         case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1374         case FS_IOC_ADD_ENCRYPTION_KEY:
1375         case FS_IOC_REMOVE_ENCRYPTION_KEY:
1376         case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1377         case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1378         case EXT4_IOC_SHUTDOWN:
1379         case FS_IOC_GETFSMAP:
1380         case FS_IOC_ENABLE_VERITY:
1381         case FS_IOC_MEASURE_VERITY:
1382         case EXT4_IOC_CLEAR_ES_CACHE:
1383         case EXT4_IOC_GETSTATE:
1384         case EXT4_IOC_GET_ES_CACHE:
1385                 break;
1386         default:
1387                 return -ENOIOCTLCMD;
1388         }
1389         return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1390 }
1391 #endif