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, EXT4_IGET_SPECIAL);
 125         if (IS_ERR(inode_bl))
 126                 return PTR_ERR(inode_bl);
 127         ei_bl = EXT4_I(inode_bl);
 128
 129         /* Protect orig inodes against a truncate and make sure,
 130          * that only 1 swap_inode_boot_loader is running. */
 131         lock_two_nondirectories(inode, inode_bl);
 132
 133         if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
 134             IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
 135             (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
 136             ext4_has_inline_data(inode)) {
 137                 err = -EINVAL;
 138                 goto journal_err_out;
 139         }
 140
 141         if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
 142             !inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) {
 143                 err = -EPERM;
 144                 goto journal_err_out;
 145         }
 146
 147         down_write(&EXT4_I(inode)->i_mmap_sem);
 148         err = filemap_write_and_wait(inode->i_mapping);
 149         if (err)
 150                 goto err_out;
 151
 152         err = filemap_write_and_wait(inode_bl->i_mapping);
 153         if (err)
 154                 goto err_out;
 155
 156         /* Wait for all existing dio workers */
 157         inode_dio_wait(inode);
 158         inode_dio_wait(inode_bl);
 159
 160         truncate_inode_pages(&inode->i_data, 0);
 161         truncate_inode_pages(&inode_bl->i_data, 0);
 162
 163         handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
 164         if (IS_ERR(handle)) {
 165                 err = -EINVAL;
 166                 goto err_out;
 167         }
 168
 169         /* Protect extent tree against block allocations via delalloc */
 170         ext4_double_down_write_data_sem(inode, inode_bl);
 171
 172         if (inode_bl->i_nlink == 0) {
 173                 /* this inode has never been used as a BOOT_LOADER */
 174                 set_nlink(inode_bl, 1);
 175                 i_uid_write(inode_bl, 0);
 176                 i_gid_write(inode_bl, 0);
 177                 inode_bl->i_flags = 0;
 178                 ei_bl->i_flags = 0;
 179                 inode_set_iversion(inode_bl, 1);
 180                 i_size_write(inode_bl, 0);
 181                 inode_bl->i_mode = S_IFREG;
 182                 if (ext4_has_feature_extents(sb)) {
 183                         ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
 184                         ext4_ext_tree_init(handle, inode_bl);
 185                 } else
 186                         memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
 187         }
 188
 189         err = dquot_initialize(inode);
 190         if (err)
 191                 goto err_out1;
 192
 193         size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
 194         size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
 195         diff = size - size_bl;
 196         swap_inode_data(inode, inode_bl);
 197
 198         inode->i_ctime = inode_bl->i_ctime = current_time(inode);
 199
 200         inode->i_generation = prandom_u32();
 201         inode_bl->i_generation = prandom_u32();
 202         reset_inode_seed(inode);
 203         reset_inode_seed(inode_bl);
 204
 205         ext4_discard_preallocations(inode);
 206
 207         err = ext4_mark_inode_dirty(handle, inode);
 208         if (err < 0) {
 209                 /* No need to update quota information. */
 210                 ext4_warning(inode->i_sb,
 211                         "couldn't mark inode #%lu dirty (err %d)",
 212                         inode->i_ino, err);
 213                 /* Revert all changes: */
 214                 swap_inode_data(inode, inode_bl);
 215                 ext4_mark_inode_dirty(handle, inode);
 216                 goto err_out1;
 217         }
 218
 219         blocks = inode_bl->i_blocks;
 220         bytes = inode_bl->i_bytes;
 221         inode_bl->i_blocks = inode->i_blocks;
 222         inode_bl->i_bytes = inode->i_bytes;
 223         err = ext4_mark_inode_dirty(handle, inode_bl);
 224         if (err < 0) {
 225                 /* No need to update quota information. */
 226                 ext4_warning(inode_bl->i_sb,
 227                         "couldn't mark inode #%lu dirty (err %d)",
 228                         inode_bl->i_ino, err);
 229                 goto revert;
 230         }
 231
 232         /* Bootloader inode should not be counted into quota information. */
 233         if (diff > 0)
 234                 dquot_free_space(inode, diff);
 235         else
 236                 err = dquot_alloc_space(inode, -1 * diff);
 237
 238         if (err < 0) {
 239 revert:
 240                 /* Revert all changes: */
 241                 inode_bl->i_blocks = blocks;
 242                 inode_bl->i_bytes = bytes;
 243                 swap_inode_data(inode, inode_bl);
 244                 ext4_mark_inode_dirty(handle, inode);
 245                 ext4_mark_inode_dirty(handle, inode_bl);
 246         }
 247
 248 err_out1:
 249         ext4_journal_stop(handle);
 250         ext4_double_up_write_data_sem(inode, inode_bl);
 251
 252 err_out:
 253         up_write(&EXT4_I(inode)->i_mmap_sem);
 254 journal_err_out:
 255         unlock_two_nondirectories(inode, inode_bl);
 256         iput(inode_bl);
 257         return err;
 258 }
 259
 260 #ifdef CONFIG_FS_ENCRYPTION
 261 static int uuid_is_zero(__u8 u[16])
 262 {
 263         int     i;
 264
 265         for (i = 0; i < 16; i++)
 266                 if (u[i])
 267                         return 0;
 268         return 1;
 269 }
 270 #endif
 271
 272 /*
 273  * If immutable is set and we are not clearing it, we're not allowed to change
 274  * anything else in the inode.  Don't error out if we're only trying to set
 275  * immutable on an immutable file.
 276  */
 277 static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
 278                                       unsigned int flags)
 279 {
 280         struct ext4_inode_info *ei = EXT4_I(inode);
 281         unsigned int oldflags = ei->i_flags;
 282
 283         if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
 284                 return 0;
 285
 286         if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
 287                 return -EPERM;
 288         if (ext4_has_feature_project(inode->i_sb) &&
 289             __kprojid_val(ei->i_projid) != new_projid)
 290                 return -EPERM;
 291
 292         return 0;
 293 }
 294
 295 static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
 296 {
 297         struct ext4_inode_info *ei = EXT4_I(inode);
 298
 299         if (S_ISDIR(inode->i_mode))
 300                 return;
 301
 302         if (test_opt2(inode->i_sb, DAX_NEVER) ||
 303             test_opt(inode->i_sb, DAX_ALWAYS))
 304                 return;
 305
 306         if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
 307                 d_mark_dontcache(inode);
 308 }
 309
 310 static bool dax_compatible(struct inode *inode, unsigned int oldflags,
 311                            unsigned int flags)
 312 {
 313         if (flags & EXT4_DAX_FL) {
 314                 if ((oldflags & EXT4_DAX_MUT_EXCL) ||
 315                      ext4_test_inode_state(inode,
 316                                           EXT4_STATE_VERITY_IN_PROGRESS)) {
 317                         return false;
 318                 }
 319         }
 320
 321         if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
 322                         return false;
 323
 324         return true;
 325 }
 326
 327 static int ext4_ioctl_setflags(struct inode *inode,
 328                                unsigned int flags)
 329 {
 330         struct ext4_inode_info *ei = EXT4_I(inode);
 331         handle_t *handle = NULL;
 332         int err = -EPERM, migrate = 0;
 333         struct ext4_iloc iloc;
 334         unsigned int oldflags, mask, i;
 335         struct super_block *sb = inode->i_sb;
 336
 337         /* Is it quota file? Do not allow user to mess with it */
 338         if (ext4_is_quota_file(inode))
 339                 goto flags_out;
 340
 341         oldflags = ei->i_flags;
 342
 343         err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
 344         if (err)
 345                 goto flags_out;
 346
 347         /*
 348          * The JOURNAL_DATA flag can only be changed by
 349          * the relevant capability.
 350          */
 351         if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
 352                 if (!capable(CAP_SYS_RESOURCE))
 353                         goto flags_out;
 354         }
 355
 356         if (!dax_compatible(inode, oldflags, flags)) {
 357                 err = -EOPNOTSUPP;
 358                 goto flags_out;
 359         }
 360
 361         if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
 362                 migrate = 1;
 363
 364         if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
 365                 if (!ext4_has_feature_casefold(sb)) {
 366                         err = -EOPNOTSUPP;
 367                         goto flags_out;
 368                 }
 369
 370                 if (!S_ISDIR(inode->i_mode)) {
 371                         err = -ENOTDIR;
 372                         goto flags_out;
 373                 }
 374
 375                 if (!ext4_empty_dir(inode)) {
 376                         err = -ENOTEMPTY;
 377                         goto flags_out;
 378                 }
 379         }
 380
 381         /*
 382          * Wait for all pending directio and then flush all the dirty pages
 383          * for this file.  The flush marks all the pages readonly, so any
 384          * subsequent attempt to write to the file (particularly mmap pages)
 385          * will come through the filesystem and fail.
 386          */
 387         if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
 388             (flags & EXT4_IMMUTABLE_FL)) {
 389                 inode_dio_wait(inode);
 390                 err = filemap_write_and_wait(inode->i_mapping);
 391                 if (err)
 392                         goto flags_out;
 393         }
 394
 395         handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
 396         if (IS_ERR(handle)) {
 397                 err = PTR_ERR(handle);
 398                 goto flags_out;
 399         }
 400         if (IS_SYNC(inode))
 401                 ext4_handle_sync(handle);
 402         err = ext4_reserve_inode_write(handle, inode, &iloc);
 403         if (err)
 404                 goto flags_err;
 405
 406         ext4_dax_dontcache(inode, flags);
 407
 408         for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
 409                 if (!(mask & EXT4_FL_USER_MODIFIABLE))
 410                         continue;
 411                 /* These flags get special treatment later */
 412                 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
 413                         continue;
 414                 if (mask & flags)
 415                         ext4_set_inode_flag(inode, i);
 416                 else
 417                         ext4_clear_inode_flag(inode, i);
 418         }
 419
 420         ext4_set_inode_flags(inode, false);
 421
 422         inode->i_ctime = current_time(inode);
 423
 424         err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 425 flags_err:
 426         ext4_journal_stop(handle);
 427         if (err)
 428                 goto flags_out;
 429
 430         if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
 431                 /*
 432                  * Changes to the journaling mode can cause unsafe changes to
 433                  * S_DAX if the inode is DAX
 434                  */
 435                 if (IS_DAX(inode)) {
 436                         err = -EBUSY;
 437                         goto flags_out;
 438                 }
 439
 440                 err = ext4_change_inode_journal_flag(inode,
 441                                                      flags & EXT4_JOURNAL_DATA_FL);
 442                 if (err)
 443                         goto flags_out;
 444         }
 445         if (migrate) {
 446                 if (flags & EXT4_EXTENTS_FL)
 447                         err = ext4_ext_migrate(inode);
 448                 else
 449                         err = ext4_ind_migrate(inode);
 450         }
 451
 452 flags_out:
 453         return err;
 454 }
 455
 456 #ifdef CONFIG_QUOTA
 457 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
 458 {
 459         struct inode *inode = file_inode(filp);
 460         struct super_block *sb = inode->i_sb;
 461         struct ext4_inode_info *ei = EXT4_I(inode);
 462         int err, rc;
 463         handle_t *handle;
 464         kprojid_t kprojid;
 465         struct ext4_iloc iloc;
 466         struct ext4_inode *raw_inode;
 467         struct dquot *transfer_to[MAXQUOTAS] = { };
 468
 469         if (!ext4_has_feature_project(sb)) {
 470                 if (projid != EXT4_DEF_PROJID)
 471                         return -EOPNOTSUPP;
 472                 else
 473                         return 0;
 474         }
 475
 476         if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
 477                 return -EOPNOTSUPP;
 478
 479         kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
 480
 481         if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
 482                 return 0;
 483
 484         err = -EPERM;
 485         /* Is it quota file? Do not allow user to mess with it */
 486         if (ext4_is_quota_file(inode))
 487                 return err;
 488
 489         err = ext4_get_inode_loc(inode, &iloc);
 490         if (err)
 491                 return err;
 492
 493         raw_inode = ext4_raw_inode(&iloc);
 494         if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
 495                 err = ext4_expand_extra_isize(inode,
 496                                               EXT4_SB(sb)->s_want_extra_isize,
 497                                               &iloc);
 498                 if (err)
 499                         return err;
 500         } else {
 501                 brelse(iloc.bh);
 502         }
 503
 504         err = dquot_initialize(inode);
 505         if (err)
 506                 return err;
 507
 508         handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
 509                 EXT4_QUOTA_INIT_BLOCKS(sb) +
 510                 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
 511         if (IS_ERR(handle))
 512                 return PTR_ERR(handle);
 513
 514         err = ext4_reserve_inode_write(handle, inode, &iloc);
 515         if (err)
 516                 goto out_stop;
 517
 518         transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
 519         if (!IS_ERR(transfer_to[PRJQUOTA])) {
 520
 521                 /* __dquot_transfer() calls back ext4_get_inode_usage() which
 522                  * counts xattr inode references.
 523                  */
 524                 down_read(&EXT4_I(inode)->xattr_sem);
 525                 err = __dquot_transfer(inode, transfer_to);
 526                 up_read(&EXT4_I(inode)->xattr_sem);
 527                 dqput(transfer_to[PRJQUOTA]);
 528                 if (err)
 529                         goto out_dirty;
 530         }
 531
 532         EXT4_I(inode)->i_projid = kprojid;
 533         inode->i_ctime = current_time(inode);
 534 out_dirty:
 535         rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
 536         if (!err)
 537                 err = rc;
 538 out_stop:
 539         ext4_journal_stop(handle);
 540         return err;
 541 }
 542 #else
 543 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
 544 {
 545         if (projid != EXT4_DEF_PROJID)
 546                 return -EOPNOTSUPP;
 547         return 0;
 548 }
 549 #endif
 550
 551 /* Transfer internal flags to xflags */
 552 static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
 553 {
 554         __u32 xflags = 0;
 555
 556         if (iflags & EXT4_SYNC_FL)
 557                 xflags |= FS_XFLAG_SYNC;
 558         if (iflags & EXT4_IMMUTABLE_FL)
 559                 xflags |= FS_XFLAG_IMMUTABLE;
 560         if (iflags & EXT4_APPEND_FL)
 561                 xflags |= FS_XFLAG_APPEND;
 562         if (iflags & EXT4_NODUMP_FL)
 563                 xflags |= FS_XFLAG_NODUMP;
 564         if (iflags & EXT4_NOATIME_FL)
 565                 xflags |= FS_XFLAG_NOATIME;
 566         if (iflags & EXT4_PROJINHERIT_FL)
 567                 xflags |= FS_XFLAG_PROJINHERIT;
 568         if (iflags & EXT4_DAX_FL)
 569                 xflags |= FS_XFLAG_DAX;
 570         return xflags;
 571 }
 572
 573 #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
 574                                   FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
 575                                   FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT | \
 576                                   FS_XFLAG_DAX)
 577
 578 /* Transfer xflags flags to internal */
 579 static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
 580 {
 581         unsigned long iflags = 0;
 582
 583         if (xflags & FS_XFLAG_SYNC)
 584                 iflags |= EXT4_SYNC_FL;
 585         if (xflags & FS_XFLAG_IMMUTABLE)
 586                 iflags |= EXT4_IMMUTABLE_FL;
 587         if (xflags & FS_XFLAG_APPEND)
 588                 iflags |= EXT4_APPEND_FL;
 589         if (xflags & FS_XFLAG_NODUMP)
 590                 iflags |= EXT4_NODUMP_FL;
 591         if (xflags & FS_XFLAG_NOATIME)
 592                 iflags |= EXT4_NOATIME_FL;
 593         if (xflags & FS_XFLAG_PROJINHERIT)
 594                 iflags |= EXT4_PROJINHERIT_FL;
 595         if (xflags & FS_XFLAG_DAX)
 596                 iflags |= EXT4_DAX_FL;
 597
 598         return iflags;
 599 }
 600
 601 static int ext4_shutdown(struct super_block *sb, unsigned long arg)
 602 {
 603         struct ext4_sb_info *sbi = EXT4_SB(sb);
 604         __u32 flags;
 605
 606         if (!capable(CAP_SYS_ADMIN))
 607                 return -EPERM;
 608
 609         if (get_user(flags, (__u32 __user *)arg))
 610                 return -EFAULT;
 611
 612         if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
 613                 return -EINVAL;
 614
 615         if (ext4_forced_shutdown(sbi))
 616                 return 0;
 617
 618         ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
 619         trace_ext4_shutdown(sb, flags);
 620
 621         switch (flags) {
 622         case EXT4_GOING_FLAGS_DEFAULT:
 623                 freeze_bdev(sb->s_bdev);
 624                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 625                 thaw_bdev(sb->s_bdev, sb);
 626                 break;
 627         case EXT4_GOING_FLAGS_LOGFLUSH:
 628                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 629                 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
 630                         (void) ext4_force_commit(sb);
 631                         jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
 632                 }
 633                 break;
 634         case EXT4_GOING_FLAGS_NOLOGFLUSH:
 635                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 636                 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
 637                         jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
 638                 break;
 639         default:
 640                 return -EINVAL;
 641         }
 642         clear_opt(sb, DISCARD);
 643         return 0;
 644 }
 645
 646 struct getfsmap_info {
 647         struct super_block      *gi_sb;
 648         struct fsmap_head __user *gi_data;
 649         unsigned int            gi_idx;
 650         __u32                   gi_last_flags;
 651 };
 652
 653 static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
 654 {
 655         struct getfsmap_info *info = priv;
 656         struct fsmap fm;
 657
 658         trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
 659
 660         info->gi_last_flags = xfm->fmr_flags;
 661         ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
 662         if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
 663                         sizeof(struct fsmap)))
 664                 return -EFAULT;
 665
 666         return 0;
 667 }
 668
 669 static int ext4_ioc_getfsmap(struct super_block *sb,
 670                              struct fsmap_head __user *arg)
 671 {
 672         struct getfsmap_info info = { NULL };
 673         struct ext4_fsmap_head xhead = {0};
 674         struct fsmap_head head;
 675         bool aborted = false;
 676         int error;
 677
 678         if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
 679                 return -EFAULT;
 680         if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
 681             memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
 682                        sizeof(head.fmh_keys[0].fmr_reserved)) ||
 683             memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
 684                        sizeof(head.fmh_keys[1].fmr_reserved)))
 685                 return -EINVAL;
 686         /*
 687          * ext4 doesn't report file extents at all, so the only valid
 688          * file offsets are the magic ones (all zeroes or all ones).
 689          */
 690         if (head.fmh_keys[0].fmr_offset ||
 691             (head.fmh_keys[1].fmr_offset != 0 &&
 692              head.fmh_keys[1].fmr_offset != -1ULL))
 693                 return -EINVAL;
 694
 695         xhead.fmh_iflags = head.fmh_iflags;
 696         xhead.fmh_count = head.fmh_count;
 697         ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
 698         ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
 699
 700         trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
 701         trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
 702
 703         info.gi_sb = sb;
 704         info.gi_data = arg;
 705         error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
 706         if (error == EXT4_QUERY_RANGE_ABORT) {
 707                 error = 0;
 708                 aborted = true;
 709         } else if (error)
 710                 return error;
 711
 712         /* If we didn't abort, set the "last" flag in the last fmx */
 713         if (!aborted && info.gi_idx) {
 714                 info.gi_last_flags |= FMR_OF_LAST;
 715                 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
 716                                  &info.gi_last_flags,
 717                                  sizeof(info.gi_last_flags)))
 718                         return -EFAULT;
 719         }
 720
 721         /* copy back header */
 722         head.fmh_entries = xhead.fmh_entries;
 723         head.fmh_oflags = xhead.fmh_oflags;
 724         if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
 725                 return -EFAULT;
 726
 727         return 0;
 728 }
 729
 730 static long ext4_ioctl_group_add(struct file *file,
 731                                  struct ext4_new_group_data *input)
 732 {
 733         struct super_block *sb = file_inode(file)->i_sb;
 734         int err, err2=0;
 735
 736         err = ext4_resize_begin(sb);
 737         if (err)
 738                 return err;
 739
 740         if (ext4_has_feature_bigalloc(sb)) {
 741                 ext4_msg(sb, KERN_ERR,
 742                          "Online resizing not supported with bigalloc");
 743                 err = -EOPNOTSUPP;
 744                 goto group_add_out;
 745         }
 746
 747         err = mnt_want_write_file(file);
 748         if (err)
 749                 goto group_add_out;
 750
 751         err = ext4_group_add(sb, input);
 752         if (EXT4_SB(sb)->s_journal) {
 753                 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
 754                 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
 755                 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
 756         }
 757         if (err == 0)
 758                 err = err2;
 759         mnt_drop_write_file(file);
 760         if (!err && ext4_has_group_desc_csum(sb) &&
 761             test_opt(sb, INIT_INODE_TABLE))
 762                 err = ext4_register_li_request(sb, input->group);
 763 group_add_out:
 764         ext4_resize_end(sb);
 765         return err;
 766 }
 767
 768 static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
 769 {
 770         struct ext4_inode_info *ei = EXT4_I(inode);
 771
 772         simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags &
 773                                                       EXT4_FL_USER_VISIBLE));
 774
 775         if (ext4_has_feature_project(inode->i_sb))
 776                 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
 777 }
 778
 779 /* So that the fiemap access checks can't overflow on 32 bit machines. */
 780 #define FIEMAP_MAX_EXTENTS      (UINT_MAX / sizeof(struct fiemap_extent))
 781
 782 static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
 783 {
 784         struct fiemap fiemap;
 785         struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
 786         struct fiemap_extent_info fieinfo = { 0, };
 787         struct inode *inode = file_inode(filp);
 788         int error;
 789
 790         if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
 791                 return -EFAULT;
 792
 793         if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
 794                 return -EINVAL;
 795
 796         fieinfo.fi_flags = fiemap.fm_flags;
 797         fieinfo.fi_extents_max = fiemap.fm_extent_count;
 798         fieinfo.fi_extents_start = ufiemap->fm_extents;
 799
 800         error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
 801                         fiemap.fm_length);
 802         fiemap.fm_flags = fieinfo.fi_flags;
 803         fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
 804         if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
 805                 error = -EFAULT;
 806
 807         return error;
 808 }
 809
 810 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 811 {
 812         struct inode *inode = file_inode(filp);
 813         struct super_block *sb = inode->i_sb;
 814         struct ext4_inode_info *ei = EXT4_I(inode);
 815         unsigned int flags;
 816
 817         ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
 818
 819         switch (cmd) {
 820         case FS_IOC_GETFSMAP:
 821                 return ext4_ioc_getfsmap(sb, (void __user *)arg);
 822         case EXT4_IOC_GETFLAGS:
 823                 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
 824                 if (S_ISREG(inode->i_mode))
 825                         flags &= ~EXT4_PROJINHERIT_FL;
 826                 return put_user(flags, (int __user *) arg);
 827         case EXT4_IOC_SETFLAGS: {
 828                 int err;
 829
 830                 if (!inode_owner_or_capable(inode))
 831                         return -EACCES;
 832
 833                 if (get_user(flags, (int __user *) arg))
 834                         return -EFAULT;
 835
 836                 if (flags & ~EXT4_FL_USER_VISIBLE)
 837                         return -EOPNOTSUPP;
 838                 /*
 839                  * chattr(1) grabs flags via GETFLAGS, modifies the result and
 840                  * passes that to SETFLAGS. So we cannot easily make SETFLAGS
 841                  * more restrictive than just silently masking off visible but
 842                  * not settable flags as we always did.
 843                  */
 844                 flags &= EXT4_FL_USER_MODIFIABLE;
 845                 if (ext4_mask_flags(inode->i_mode, flags) != flags)
 846                         return -EOPNOTSUPP;
 847
 848                 err = mnt_want_write_file(filp);
 849                 if (err)
 850                         return err;
 851
 852                 inode_lock(inode);
 853                 err = ext4_ioctl_check_immutable(inode,
 854                                 from_kprojid(&init_user_ns, ei->i_projid),
 855                                 flags);
 856                 if (!err)
 857                         err = ext4_ioctl_setflags(inode, flags);
 858                 inode_unlock(inode);
 859                 mnt_drop_write_file(filp);
 860                 return err;
 861         }
 862         case EXT4_IOC_GETVERSION:
 863         case EXT4_IOC_GETVERSION_OLD:
 864                 return put_user(inode->i_generation, (int __user *) arg);
 865         case EXT4_IOC_SETVERSION:
 866         case EXT4_IOC_SETVERSION_OLD: {
 867                 handle_t *handle;
 868                 struct ext4_iloc iloc;
 869                 __u32 generation;
 870                 int err;
 871
 872                 if (!inode_owner_or_capable(inode))
 873                         return -EPERM;
 874
 875                 if (ext4_has_metadata_csum(inode->i_sb)) {
 876                         ext4_warning(sb, "Setting inode version is not "
 877                                      "supported with metadata_csum enabled.");
 878                         return -ENOTTY;
 879                 }
 880
 881                 err = mnt_want_write_file(filp);
 882                 if (err)
 883                         return err;
 884                 if (get_user(generation, (int __user *) arg)) {
 885                         err = -EFAULT;
 886                         goto setversion_out;
 887                 }
 888
 889                 inode_lock(inode);
 890                 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
 891                 if (IS_ERR(handle)) {
 892                         err = PTR_ERR(handle);
 893                         goto unlock_out;
 894                 }
 895                 err = ext4_reserve_inode_write(handle, inode, &iloc);
 896                 if (err == 0) {
 897                         inode->i_ctime = current_time(inode);
 898                         inode->i_generation = generation;
 899                         err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 900                 }
 901                 ext4_journal_stop(handle);
 902
 903 unlock_out:
 904                 inode_unlock(inode);
 905 setversion_out:
 906                 mnt_drop_write_file(filp);
 907                 return err;
 908         }
 909         case EXT4_IOC_GROUP_EXTEND: {
 910                 ext4_fsblk_t n_blocks_count;
 911                 int err, err2=0;
 912
 913                 err = ext4_resize_begin(sb);
 914                 if (err)
 915                         return err;
 916
 917                 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
 918                         err = -EFAULT;
 919                         goto group_extend_out;
 920                 }
 921
 922                 if (ext4_has_feature_bigalloc(sb)) {
 923                         ext4_msg(sb, KERN_ERR,
 924                                  "Online resizing not supported with bigalloc");
 925                         err = -EOPNOTSUPP;
 926                         goto group_extend_out;
 927                 }
 928
 929                 err = mnt_want_write_file(filp);
 930                 if (err)
 931                         goto group_extend_out;
 932
 933                 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
 934                 if (EXT4_SB(sb)->s_journal) {
 935                         jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
 936                         err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
 937                         jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
 938                 }
 939                 if (err == 0)
 940                         err = err2;
 941                 mnt_drop_write_file(filp);
 942 group_extend_out:
 943                 ext4_resize_end(sb);
 944                 return err;
 945         }
 946
 947         case EXT4_IOC_MOVE_EXT: {
 948                 struct move_extent me;
 949                 struct fd donor;
 950                 int err;
 951
 952                 if (!(filp->f_mode & FMODE_READ) ||
 953                     !(filp->f_mode & FMODE_WRITE))
 954                         return -EBADF;
 955
 956                 if (copy_from_user(&me,
 957                         (struct move_extent __user *)arg, sizeof(me)))
 958                         return -EFAULT;
 959                 me.moved_len = 0;
 960
 961                 donor = fdget(me.donor_fd);
 962                 if (!donor.file)
 963                         return -EBADF;
 964
 965                 if (!(donor.file->f_mode & FMODE_WRITE)) {
 966                         err = -EBADF;
 967                         goto mext_out;
 968                 }
 969
 970                 if (ext4_has_feature_bigalloc(sb)) {
 971                         ext4_msg(sb, KERN_ERR,
 972                                  "Online defrag not supported with bigalloc");
 973                         err = -EOPNOTSUPP;
 974                         goto mext_out;
 975                 } else if (IS_DAX(inode)) {
 976                         ext4_msg(sb, KERN_ERR,
 977                                  "Online defrag not supported with DAX");
 978                         err = -EOPNOTSUPP;
 979                         goto mext_out;
 980                 }
 981
 982                 err = mnt_want_write_file(filp);
 983                 if (err)
 984                         goto mext_out;
 985
 986                 err = ext4_move_extents(filp, donor.file, me.orig_start,
 987                                         me.donor_start, me.len, &me.moved_len);
 988                 mnt_drop_write_file(filp);
 989
 990                 if (copy_to_user((struct move_extent __user *)arg,
 991                                  &me, sizeof(me)))
 992                         err = -EFAULT;
 993 mext_out:
 994                 fdput(donor);
 995                 return err;
 996         }
 997
 998         case EXT4_IOC_GROUP_ADD: {
 999                 struct ext4_new_group_data input;
1000
1001                 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
1002                                 sizeof(input)))
1003                         return -EFAULT;
1004
1005                 return ext4_ioctl_group_add(filp, &input);
1006         }
1007
1008         case EXT4_IOC_MIGRATE:
1009         {
1010                 int err;
1011                 if (!inode_owner_or_capable(inode))
1012                         return -EACCES;
1013
1014                 err = mnt_want_write_file(filp);
1015                 if (err)
1016                         return err;
1017                 /*
1018                  * inode_mutex prevent write and truncate on the file.
1019                  * Read still goes through. We take i_data_sem in
1020                  * ext4_ext_swap_inode_data before we switch the
1021                  * inode format to prevent read.
1022                  */
1023                 inode_lock((inode));
1024                 err = ext4_ext_migrate(inode);
1025                 inode_unlock((inode));
1026                 mnt_drop_write_file(filp);
1027                 return err;
1028         }
1029
1030         case EXT4_IOC_ALLOC_DA_BLKS:
1031         {
1032                 int err;
1033                 if (!inode_owner_or_capable(inode))
1034                         return -EACCES;
1035
1036                 err = mnt_want_write_file(filp);
1037                 if (err)
1038                         return err;
1039                 err = ext4_alloc_da_blocks(inode);
1040                 mnt_drop_write_file(filp);
1041                 return err;
1042         }
1043
1044         case EXT4_IOC_SWAP_BOOT:
1045         {
1046                 int err;
1047                 if (!(filp->f_mode & FMODE_WRITE))
1048                         return -EBADF;
1049                 err = mnt_want_write_file(filp);
1050                 if (err)
1051                         return err;
1052                 err = swap_inode_boot_loader(sb, inode);
1053                 mnt_drop_write_file(filp);
1054                 return err;
1055         }
1056
1057         case EXT4_IOC_RESIZE_FS: {
1058                 ext4_fsblk_t n_blocks_count;
1059                 int err = 0, err2 = 0;
1060                 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
1061
1062                 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
1063                                    sizeof(__u64))) {
1064                         return -EFAULT;
1065                 }
1066
1067                 err = ext4_resize_begin(sb);
1068                 if (err)
1069                         return err;
1070
1071                 err = mnt_want_write_file(filp);
1072                 if (err)
1073                         goto resizefs_out;
1074
1075                 err = ext4_resize_fs(sb, n_blocks_count);
1076                 if (EXT4_SB(sb)->s_journal) {
1077                         jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1078                         err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
1079                         jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1080                 }
1081                 if (err == 0)
1082                         err = err2;
1083                 mnt_drop_write_file(filp);
1084                 if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
1085                     ext4_has_group_desc_csum(sb) &&
1086                     test_opt(sb, INIT_INODE_TABLE))
1087                         err = ext4_register_li_request(sb, o_group);
1088
1089 resizefs_out:
1090                 ext4_resize_end(sb);
1091                 return err;
1092         }
1093
1094         case FITRIM:
1095         {
1096                 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1097                 struct fstrim_range range;
1098                 int ret = 0;
1099
1100                 if (!capable(CAP_SYS_ADMIN))
1101                         return -EPERM;
1102
1103                 if (!blk_queue_discard(q))
1104                         return -EOPNOTSUPP;
1105
1106                 /*
1107                  * We haven't replayed the journal, so we cannot use our
1108                  * block-bitmap-guided storage zapping commands.
1109                  */
1110                 if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
1111                         return -EROFS;
1112
1113                 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1114                     sizeof(range)))
1115                         return -EFAULT;
1116
1117                 range.minlen = max((unsigned int)range.minlen,
1118                                    q->limits.discard_granularity);
1119                 ret = ext4_trim_fs(sb, &range);
1120                 if (ret < 0)
1121                         return ret;
1122
1123                 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1124                     sizeof(range)))
1125                         return -EFAULT;
1126
1127                 return 0;
1128         }
1129         case EXT4_IOC_PRECACHE_EXTENTS:
1130                 return ext4_ext_precache(inode);
1131
1132         case EXT4_IOC_SET_ENCRYPTION_POLICY:
1133                 if (!ext4_has_feature_encrypt(sb))
1134                         return -EOPNOTSUPP;
1135                 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
1136
1137         case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
1138 #ifdef CONFIG_FS_ENCRYPTION
1139                 int err, err2;
1140                 struct ext4_sb_info *sbi = EXT4_SB(sb);
1141                 handle_t *handle;
1142
1143                 if (!ext4_has_feature_encrypt(sb))
1144                         return -EOPNOTSUPP;
1145                 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
1146                         err = mnt_want_write_file(filp);
1147                         if (err)
1148                                 return err;
1149                         handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
1150                         if (IS_ERR(handle)) {
1151                                 err = PTR_ERR(handle);
1152                                 goto pwsalt_err_exit;
1153                         }
1154                         err = ext4_journal_get_write_access(handle, sbi->s_sbh);
1155                         if (err)
1156                                 goto pwsalt_err_journal;
1157                         generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
1158                         err = ext4_handle_dirty_metadata(handle, NULL,
1159                                                          sbi->s_sbh);
1160                 pwsalt_err_journal:
1161                         err2 = ext4_journal_stop(handle);
1162                         if (err2 && !err)
1163                                 err = err2;
1164                 pwsalt_err_exit:
1165                         mnt_drop_write_file(filp);
1166                         if (err)
1167                                 return err;
1168                 }
1169                 if (copy_to_user((void __user *) arg,
1170                                  sbi->s_es->s_encrypt_pw_salt, 16))
1171                         return -EFAULT;
1172                 return 0;
1173 #else
1174                 return -EOPNOTSUPP;
1175 #endif
1176         }
1177         case EXT4_IOC_GET_ENCRYPTION_POLICY:
1178                 if (!ext4_has_feature_encrypt(sb))
1179                         return -EOPNOTSUPP;
1180                 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1181
1182         case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1183                 if (!ext4_has_feature_encrypt(sb))
1184                         return -EOPNOTSUPP;
1185                 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1186
1187         case FS_IOC_ADD_ENCRYPTION_KEY:
1188                 if (!ext4_has_feature_encrypt(sb))
1189                         return -EOPNOTSUPP;
1190                 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1191
1192         case FS_IOC_REMOVE_ENCRYPTION_KEY:
1193                 if (!ext4_has_feature_encrypt(sb))
1194                         return -EOPNOTSUPP;
1195                 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1196
1197         case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1198                 if (!ext4_has_feature_encrypt(sb))
1199                         return -EOPNOTSUPP;
1200                 return fscrypt_ioctl_remove_key_all_users(filp,
1201                                                           (void __user *)arg);
1202         case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1203                 if (!ext4_has_feature_encrypt(sb))
1204                         return -EOPNOTSUPP;
1205                 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1206
1207         case FS_IOC_GET_ENCRYPTION_NONCE:
1208                 if (!ext4_has_feature_encrypt(sb))
1209                         return -EOPNOTSUPP;
1210                 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
1211
1212         case EXT4_IOC_CLEAR_ES_CACHE:
1213         {
1214                 if (!inode_owner_or_capable(inode))
1215                         return -EACCES;
1216                 ext4_clear_inode_es(inode);
1217                 return 0;
1218         }
1219
1220         case EXT4_IOC_GETSTATE:
1221         {
1222                 __u32   state = 0;
1223
1224                 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1225                         state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1226                 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1227                         state |= EXT4_STATE_FLAG_NEW;
1228                 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1229                         state |= EXT4_STATE_FLAG_NEWENTRY;
1230                 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1231                         state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1232
1233                 return put_user(state, (__u32 __user *) arg);
1234         }
1235
1236         case EXT4_IOC_GET_ES_CACHE:
1237                 return ext4_ioctl_get_es_cache(filp, arg);
1238
1239         case EXT4_IOC_FSGETXATTR:
1240         {
1241                 struct fsxattr fa;
1242
1243                 ext4_fill_fsxattr(inode, &fa);
1244
1245                 if (copy_to_user((struct fsxattr __user *)arg,
1246                                  &fa, sizeof(fa)))
1247                         return -EFAULT;
1248                 return 0;
1249         }
1250         case EXT4_IOC_FSSETXATTR:
1251         {
1252                 struct fsxattr fa, old_fa;
1253                 int err;
1254
1255                 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
1256                                    sizeof(fa)))
1257                         return -EFAULT;
1258
1259                 /* Make sure caller has proper permission */
1260                 if (!inode_owner_or_capable(inode))
1261                         return -EACCES;
1262
1263                 if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
1264                         return -EOPNOTSUPP;
1265
1266                 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
1267                 if (ext4_mask_flags(inode->i_mode, flags) != flags)
1268                         return -EOPNOTSUPP;
1269
1270                 err = mnt_want_write_file(filp);
1271                 if (err)
1272                         return err;
1273
1274                 inode_lock(inode);
1275                 ext4_fill_fsxattr(inode, &old_fa);
1276                 err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
1277                 if (err)
1278                         goto out;
1279                 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
1280                          (flags & EXT4_FL_XFLAG_VISIBLE);
1281                 err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags);
1282                 if (err)
1283                         goto out;
1284                 err = ext4_ioctl_setflags(inode, flags);
1285                 if (err)
1286                         goto out;
1287                 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
1288 out:
1289                 inode_unlock(inode);
1290                 mnt_drop_write_file(filp);
1291                 return err;
1292         }
1293         case EXT4_IOC_SHUTDOWN:
1294                 return ext4_shutdown(sb, arg);
1295
1296         case FS_IOC_ENABLE_VERITY:
1297                 if (!ext4_has_feature_verity(sb))
1298                         return -EOPNOTSUPP;
1299                 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1300
1301         case FS_IOC_MEASURE_VERITY:
1302                 if (!ext4_has_feature_verity(sb))
1303                         return -EOPNOTSUPP;
1304                 return fsverity_ioctl_measure(filp, (void __user *)arg);
1305
1306         default:
1307                 return -ENOTTY;
1308         }
1309 }
1310
1311 #ifdef CONFIG_COMPAT
1312 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1313 {
1314         /* These are just misnamed, they actually get/put from/to user an int */
1315         switch (cmd) {
1316         case EXT4_IOC32_GETFLAGS:
1317                 cmd = EXT4_IOC_GETFLAGS;
1318                 break;
1319         case EXT4_IOC32_SETFLAGS:
1320                 cmd = EXT4_IOC_SETFLAGS;
1321                 break;
1322         case EXT4_IOC32_GETVERSION:
1323                 cmd = EXT4_IOC_GETVERSION;
1324                 break;
1325         case EXT4_IOC32_SETVERSION:
1326                 cmd = EXT4_IOC_SETVERSION;
1327                 break;
1328         case EXT4_IOC32_GROUP_EXTEND:
1329                 cmd = EXT4_IOC_GROUP_EXTEND;
1330                 break;
1331         case EXT4_IOC32_GETVERSION_OLD:
1332                 cmd = EXT4_IOC_GETVERSION_OLD;
1333                 break;
1334         case EXT4_IOC32_SETVERSION_OLD:
1335                 cmd = EXT4_IOC_SETVERSION_OLD;
1336                 break;
1337         case EXT4_IOC32_GETRSVSZ:
1338                 cmd = EXT4_IOC_GETRSVSZ;
1339                 break;
1340         case EXT4_IOC32_SETRSVSZ:
1341                 cmd = EXT4_IOC_SETRSVSZ;
1342                 break;
1343         case EXT4_IOC32_GROUP_ADD: {
1344                 struct compat_ext4_new_group_input __user *uinput;
1345                 struct ext4_new_group_data input;
1346                 int err;
1347
1348                 uinput = compat_ptr(arg);
1349                 err = get_user(input.group, &uinput->group);
1350                 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1351                 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1352                 err |= get_user(input.inode_table, &uinput->inode_table);
1353                 err |= get_user(input.blocks_count, &uinput->blocks_count);
1354                 err |= get_user(input.reserved_blocks,
1355                                 &uinput->reserved_blocks);
1356                 if (err)
1357                         return -EFAULT;
1358                 return ext4_ioctl_group_add(file, &input);
1359         }
1360         case EXT4_IOC_MOVE_EXT:
1361         case EXT4_IOC_RESIZE_FS:
1362         case FITRIM:
1363         case EXT4_IOC_PRECACHE_EXTENTS:
1364         case EXT4_IOC_SET_ENCRYPTION_POLICY:
1365         case EXT4_IOC_GET_ENCRYPTION_PWSALT:
1366         case EXT4_IOC_GET_ENCRYPTION_POLICY:
1367         case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1368         case FS_IOC_ADD_ENCRYPTION_KEY:
1369         case FS_IOC_REMOVE_ENCRYPTION_KEY:
1370         case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1371         case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1372         case FS_IOC_GET_ENCRYPTION_NONCE:
1373         case EXT4_IOC_SHUTDOWN:
1374         case FS_IOC_GETFSMAP:
1375         case FS_IOC_ENABLE_VERITY:
1376         case FS_IOC_MEASURE_VERITY:
1377         case EXT4_IOC_CLEAR_ES_CACHE:
1378         case EXT4_IOC_GETSTATE:
1379         case EXT4_IOC_GET_ES_CACHE:
1380         case EXT4_IOC_FSGETXATTR:
1381         case EXT4_IOC_FSSETXATTR:
1382                 break;
1383         default:
1384                 return -ENOIOCTLCMD;
1385         }
1386         return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1387 }
1388 #endif