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ALSA: hda - Fix pending unsol events at shutdown
[linux-2.6-block.git] / fs / ext4 / ioctl.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
ac27a0ec 2/*
617ba13b 3 * linux/fs/ext4/ioctl.c
ac27a0ec
DK		 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>
ac27a0ec 12#include <linux/capability.h>
ac27a0ec
DK		 13#include <linux/time.h>
14#include <linux/compat.h>
42a74f20 15#include <linux/mount.h>
748de673 16#include <linux/file.h>
9b7365fc 17#include <linux/quotaops.h>
23253068 18#include <linux/random.h>
8da4b8c4 19#include <linux/uuid.h>
7c0f6ba6 20#include <linux/uaccess.h>
783d9485 21#include <linux/delay.h>
ee73f9a5 22#include <linux/iversion.h>
3dcf5451
CH		 23#include "ext4_jbd2.h"
24#include "ext4.h"
0c9ec4be
DW		 25#include <linux/fsmap.h>
26#include "fsmap.h"
27#include <trace/events/ext4.h>
ac27a0ec 28
393d1d1d
DTB		 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 */
37static void memswap(void *a, void *b, size_t len)
38{
39 unsigned char *ap, *bp;
393d1d1d
DTB		 40
41 ap = (unsigned char *)a;
42 bp = (unsigned char *)b;
43 while (len-- > 0) {
4b7e2db5 44 swap(*ap, *bp);
393d1d1d
DTB		 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 */
61static 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;
abdc644e 66 unsigned long tmp;
393d1d1d
DTB		 67
68 ei1 = EXT4_I(inode1);
69 ei2 = EXT4_I(inode2);
70
9c5d58fb 71 swap(inode1->i_version, inode2->i_version);
9c5d58fb
JL		 72 swap(inode1->i_atime, inode2->i_atime);
73 swap(inode1->i_mtime, inode2->i_mtime);
393d1d1d
DTB		 74
75 memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
abdc644e 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);
9c5d58fb 80 swap(ei1->i_disksize, ei2->i_disksize);
cde2d7a7
TT		 81 ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
82 ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
393d1d1d
DTB		 83
84 isize = i_size_read(inode1);
85 i_size_write(inode1, i_size_read(inode2));
86 i_size_write(inode2, isize);
87}
88
18aded17
TT		 89static 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
393d1d1d
DTB		 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 */
113static 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;
393d1d1d 119 struct ext4_inode_info *ei_bl;
aa507b5f 120 qsize_t size, size_bl, diff;
121 blkcnt_t blocks;
122 unsigned short bytes;
393d1d1d 123
8a363970 124 inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO, EXT4_IGET_SPECIAL);
d8558a29
TT		 125 if (IS_ERR(inode_bl))
126 return PTR_ERR(inode_bl);
393d1d1d
DTB		 127 ei_bl = EXT4_I(inode_bl);
128
393d1d1d
DTB		 129 /* Protect orig inodes against a truncate and make sure,
130 * that only 1 swap_inode_boot_loader is running. */
375e289e 131 lock_two_nondirectories(inode, inode_bl);
393d1d1d 132
67a11611 133 if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
134 IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
6e589291 135 (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
67a11611 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
a46c68a3 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
393d1d1d 156 /* Wait for all existing dio workers */
393d1d1d
DTB		 157 inode_dio_wait(inode);
158 inode_dio_wait(inode_bl);
159
18aded17
TT		 160 truncate_inode_pages(&inode->i_data, 0);
161 truncate_inode_pages(&inode_bl->i_data, 0);
162
393d1d1d
DTB		 163 handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
164 if (IS_ERR(handle)) {
165 err = -EINVAL;
a46c68a3 166 goto err_out;
393d1d1d
DTB		 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;
ee73f9a5 179 inode_set_iversion(inode_bl, 1);
393d1d1d
DTB		 180 i_size_write(inode_bl, 0);
181 inode_bl->i_mode = S_IFREG;
e2b911c5 182 if (ext4_has_feature_extents(sb)) {
393d1d1d
DTB		 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
aa507b5f 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;
393d1d1d
DTB		 196 swap_inode_data(inode, inode_bl);
197
eeca7ea1 198 inode->i_ctime = inode_bl->i_ctime = current_time(inode);
393d1d1d 199
23253068
TT		 200 inode->i_generation = prandom_u32();
201 inode_bl->i_generation = prandom_u32();
18aded17
TT		 202 reset_inode_seed(inode);
203 reset_inode_seed(inode_bl);
393d1d1d
DTB		 204
205 ext4_discard_preallocations(inode);
206
207 err = ext4_mark_inode_dirty(handle, inode);
208 if (err < 0) {
aa507b5f 209 /* No need to update quota information. */
393d1d1d
DTB		 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);
18aded17 215 ext4_mark_inode_dirty(handle, inode);
aa507b5f 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) {
239revert:
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);
393d1d1d 246 }
aa507b5f 247
248err_out1:
393d1d1d 249 ext4_journal_stop(handle);
393d1d1d
DTB		 250 ext4_double_up_write_data_sem(inode, inode_bl);
251
a46c68a3 252err_out:
253 up_write(&EXT4_I(inode)->i_mmap_sem);
30d29b11 254journal_err_out:
375e289e 255 unlock_two_nondirectories(inode, inode_bl);
393d1d1d 256 iput(inode_bl);
393d1d1d
DTB		 257 return err;
258}
259
643fa961 260#ifdef CONFIG_FS_ENCRYPTION
9bd8212f
MH		 261static 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}
ba679017 270#endif
9bd8212f 271
2e538403
DW		 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 */
277static 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
9b7365fc
LX		 295static int ext4_ioctl_setflags(struct inode *inode,
296 unsigned int flags)
297{
298 struct ext4_inode_info *ei = EXT4_I(inode);
299 handle_t *handle = NULL;
fdde368e 300 int err = -EPERM, migrate = 0;
9b7365fc
LX		 301 struct ext4_iloc iloc;
302 unsigned int oldflags, mask, i;
303 unsigned int jflag;
b886ee3e 304 struct super_block *sb = inode->i_sb;
9b7365fc
LX		 305
306 /* Is it quota file? Do not allow user to mess with it */
02749a4c 307 if (ext4_is_quota_file(inode))
9b7365fc
LX		 308 goto flags_out;
309
310 oldflags = ei->i_flags;
311
312 /* The JOURNAL_DATA flag is modifiable only by root */
313 jflag = flags & EXT4_JOURNAL_DATA_FL;
314
5aca2842
DW		 315 err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
316 if (err)
317 goto flags_out;
9b7365fc
LX		 318
319 /*
320 * The JOURNAL_DATA flag can only be changed by
321 * the relevant capability.
322 */
323 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
324 if (!capable(CAP_SYS_RESOURCE))
325 goto flags_out;
326 }
327 if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
328 migrate = 1;
329
330 if (flags & EXT4_EOFBLOCKS_FL) {
331 /* we don't support adding EOFBLOCKS flag */
332 if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
333 err = -EOPNOTSUPP;
334 goto flags_out;
335 }
2c98eb5e
TT		 336 } else if (oldflags & EXT4_EOFBLOCKS_FL) {
337 err = ext4_truncate(inode);
338 if (err)
339 goto flags_out;
340 }
9b7365fc 341
b886ee3e
GKB		 342 if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
343 if (!ext4_has_feature_casefold(sb)) {
344 err = -EOPNOTSUPP;
345 goto flags_out;
346 }
347
348 if (!S_ISDIR(inode->i_mode)) {
349 err = -ENOTDIR;
350 goto flags_out;
351 }
352
353 if (!ext4_empty_dir(inode)) {
354 err = -ENOTEMPTY;
355 goto flags_out;
356 }
357 }
358
2e538403
DW		 359 /*
360 * Wait for all pending directio and then flush all the dirty pages
361 * for this file. The flush marks all the pages readonly, so any
362 * subsequent attempt to write to the file (particularly mmap pages)
363 * will come through the filesystem and fail.
364 */
365 if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
366 (flags & EXT4_IMMUTABLE_FL)) {
367 inode_dio_wait(inode);
368 err = filemap_write_and_wait(inode->i_mapping);
369 if (err)
370 goto flags_out;
371 }
372
9b7365fc
LX		 373 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
374 if (IS_ERR(handle)) {
375 err = PTR_ERR(handle);
376 goto flags_out;
377 }
378 if (IS_SYNC(inode))
379 ext4_handle_sync(handle);
380 err = ext4_reserve_inode_write(handle, inode, &iloc);
381 if (err)
382 goto flags_err;
383
384 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
385 if (!(mask & EXT4_FL_USER_MODIFIABLE))
386 continue;
f8011d93
JK		 387 /* These flags get special treatment later */
388 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
389 continue;
9b7365fc
LX		 390 if (mask & flags)
391 ext4_set_inode_flag(inode, i);
392 else
393 ext4_clear_inode_flag(inode, i);
394 }
395
396 ext4_set_inode_flags(inode);
eeca7ea1 397 inode->i_ctime = current_time(inode);
9b7365fc
LX		 398
399 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
400flags_err:
401 ext4_journal_stop(handle);
402 if (err)
403 goto flags_out;
404
e9072d85
RZ		 405 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
406 /*
407 * Changes to the journaling mode can cause unsafe changes to
408 * S_DAX if we are using the DAX mount option.
409 */
410 if (test_opt(inode->i_sb, DAX)) {
411 err = -EBUSY;
412 goto flags_out;
413 }
414
9b7365fc 415 err = ext4_change_inode_journal_flag(inode, jflag);
e9072d85
RZ		 416 if (err)
417 goto flags_out;
418 }
9b7365fc
LX		 419 if (migrate) {
420 if (flags & EXT4_EXTENTS_FL)
421 err = ext4_ext_migrate(inode);
422 else
423 err = ext4_ind_migrate(inode);
424 }
425
426flags_out:
427 return err;
428}
429
430#ifdef CONFIG_QUOTA
431static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
432{
433 struct inode *inode = file_inode(filp);
434 struct super_block *sb = inode->i_sb;
435 struct ext4_inode_info *ei = EXT4_I(inode);
436 int err, rc;
437 handle_t *handle;
438 kprojid_t kprojid;
439 struct ext4_iloc iloc;
440 struct ext4_inode *raw_inode;
079788d0 441 struct dquot *transfer_to[MAXQUOTAS] = { };
9b7365fc 442
0b7b7779 443 if (!ext4_has_feature_project(sb)) {
9b7365fc
LX		 444 if (projid != EXT4_DEF_PROJID)
445 return -EOPNOTSUPP;
446 else
447 return 0;
448 }
449
450 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
451 return -EOPNOTSUPP;
452
453 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
454
455 if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
456 return 0;
457
9b7365fc 458 err = -EPERM;
9b7365fc 459 /* Is it quota file? Do not allow user to mess with it */
02749a4c 460 if (ext4_is_quota_file(inode))
dc7ac6c4 461 return err;
9b7365fc
LX		 462
463 err = ext4_get_inode_loc(inode, &iloc);
464 if (err)
dc7ac6c4 465 return err;
9b7365fc
LX		 466
467 raw_inode = ext4_raw_inode(&iloc);
468 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
c03b45b8
MX		 469 err = ext4_expand_extra_isize(inode,
470 EXT4_SB(sb)->s_want_extra_isize,
471 &iloc);
472 if (err)
dc7ac6c4 473 return err;
c03b45b8 474 } else {
9b7365fc 475 brelse(iloc.bh);
9b7365fc 476 }
9b7365fc 477
182a79e0
WS		 478 err = dquot_initialize(inode);
479 if (err)
480 return err;
9b7365fc
LX		 481
482 handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
483 EXT4_QUOTA_INIT_BLOCKS(sb) +
484 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
dc7ac6c4
WS		 485 if (IS_ERR(handle))
486 return PTR_ERR(handle);
9b7365fc
LX		 487
488 err = ext4_reserve_inode_write(handle, inode, &iloc);
489 if (err)
490 goto out_stop;
491
079788d0
WS		 492 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
493 if (!IS_ERR(transfer_to[PRJQUOTA])) {
7a9ca53a
TE		 494
495 /* __dquot_transfer() calls back ext4_get_inode_usage() which
496 * counts xattr inode references.
497 */
498 down_read(&EXT4_I(inode)->xattr_sem);
079788d0 499 err = __dquot_transfer(inode, transfer_to);
7a9ca53a 500 up_read(&EXT4_I(inode)->xattr_sem);
079788d0
WS		 501 dqput(transfer_to[PRJQUOTA]);
502 if (err)
503 goto out_dirty;
9b7365fc 504 }
079788d0 505
9b7365fc 506 EXT4_I(inode)->i_projid = kprojid;
eeca7ea1 507 inode->i_ctime = current_time(inode);
9b7365fc
LX		 508out_dirty:
509 rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
510 if (!err)
511 err = rc;
512out_stop:
513 ext4_journal_stop(handle);
9b7365fc
LX		 514 return err;
515}
516#else
517static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
518{
519 if (projid != EXT4_DEF_PROJID)
520 return -EOPNOTSUPP;
521 return 0;
522}
523#endif
524
525/* Transfer internal flags to xflags */
526static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
527{
528 __u32 xflags = 0;
529
530 if (iflags & EXT4_SYNC_FL)
531 xflags |= FS_XFLAG_SYNC;
532 if (iflags & EXT4_IMMUTABLE_FL)
533 xflags |= FS_XFLAG_IMMUTABLE;
534 if (iflags & EXT4_APPEND_FL)
535 xflags |= FS_XFLAG_APPEND;
536 if (iflags & EXT4_NODUMP_FL)
537 xflags |= FS_XFLAG_NODUMP;
538 if (iflags & EXT4_NOATIME_FL)
539 xflags |= FS_XFLAG_NOATIME;
540 if (iflags & EXT4_PROJINHERIT_FL)
541 xflags |= FS_XFLAG_PROJINHERIT;
542 return xflags;
543}
544
d14e7683
JK		 545#define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
546 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
547 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
548
9b7365fc
LX		 549/* Transfer xflags flags to internal */
550static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
551{
552 unsigned long iflags = 0;
553
554 if (xflags & FS_XFLAG_SYNC)
555 iflags |= EXT4_SYNC_FL;
556 if (xflags & FS_XFLAG_IMMUTABLE)
557 iflags |= EXT4_IMMUTABLE_FL;
558 if (xflags & FS_XFLAG_APPEND)
559 iflags |= EXT4_APPEND_FL;
560 if (xflags & FS_XFLAG_NODUMP)
561 iflags |= EXT4_NODUMP_FL;
562 if (xflags & FS_XFLAG_NOATIME)
563 iflags |= EXT4_NOATIME_FL;
564 if (xflags & FS_XFLAG_PROJINHERIT)
565 iflags |= EXT4_PROJINHERIT_FL;
566
567 return iflags;
568}
569
1a20a630 570static int ext4_shutdown(struct super_block *sb, unsigned long arg)
783d9485
TT		 571{
572 struct ext4_sb_info *sbi = EXT4_SB(sb);
573 __u32 flags;
574
575 if (!capable(CAP_SYS_ADMIN))
576 return -EPERM;
577
578 if (get_user(flags, (__u32 __user *)arg))
579 return -EFAULT;
580
581 if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
582 return -EINVAL;
583
584 if (ext4_forced_shutdown(sbi))
585 return 0;
586
587 ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
ccf0f32a 588 trace_ext4_shutdown(sb, flags);
783d9485
TT		 589
590 switch (flags) {
591 case EXT4_GOING_FLAGS_DEFAULT:
592 freeze_bdev(sb->s_bdev);
593 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
594 thaw_bdev(sb->s_bdev, sb);
595 break;
596 case EXT4_GOING_FLAGS_LOGFLUSH:
597 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
598 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
599 (void) ext4_force_commit(sb);
fb7c0244 600 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
783d9485
TT		 601 }
602 break;
603 case EXT4_GOING_FLAGS_NOLOGFLUSH:
604 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
a6d9946b 605 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
fb7c0244 606 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
783d9485
TT		 607 break;
608 default:
609 return -EINVAL;
610 }
611 clear_opt(sb, DISCARD);
612 return 0;
613}
614
0c9ec4be
DW		 615struct getfsmap_info {
616 struct super_block *gi_sb;
617 struct fsmap_head __user *gi_data;
618 unsigned int gi_idx;
619 __u32 gi_last_flags;
620};
621
622static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
623{
624 struct getfsmap_info *info = priv;
625 struct fsmap fm;
626
627 trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
628
629 info->gi_last_flags = xfm->fmr_flags;
630 ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
631 if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
632 sizeof(struct fsmap)))
633 return -EFAULT;
634
635 return 0;
636}
637
638static int ext4_ioc_getfsmap(struct super_block *sb,
639 struct fsmap_head __user *arg)
640{
0ba33fac 641 struct getfsmap_info info = { NULL };
0c9ec4be
DW		 642 struct ext4_fsmap_head xhead = {0};
643 struct fsmap_head head;
644 bool aborted = false;
645 int error;
646
647 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
648 return -EFAULT;
649 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
650 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
651 sizeof(head.fmh_keys[0].fmr_reserved)) ||
652 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
653 sizeof(head.fmh_keys[1].fmr_reserved)))
654 return -EINVAL;
655 /*
656 * ext4 doesn't report file extents at all, so the only valid
657 * file offsets are the magic ones (all zeroes or all ones).
658 */
659 if (head.fmh_keys[0].fmr_offset ||
660 (head.fmh_keys[1].fmr_offset != 0 &&
661 head.fmh_keys[1].fmr_offset != -1ULL))
662 return -EINVAL;
663
664 xhead.fmh_iflags = head.fmh_iflags;
665 xhead.fmh_count = head.fmh_count;
666 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
667 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
668
669 trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
670 trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
671
672 info.gi_sb = sb;
673 info.gi_data = arg;
674 error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
675 if (error == EXT4_QUERY_RANGE_ABORT) {
676 error = 0;
677 aborted = true;
678 } else if (error)
679 return error;
680
681 /* If we didn't abort, set the "last" flag in the last fmx */
682 if (!aborted && info.gi_idx) {
683 info.gi_last_flags |= FMR_OF_LAST;
684 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
685 &info.gi_last_flags,
686 sizeof(info.gi_last_flags)))
687 return -EFAULT;
688 }
689
690 /* copy back header */
691 head.fmh_entries = xhead.fmh_entries;
692 head.fmh_oflags = xhead.fmh_oflags;
693 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
694 return -EFAULT;
695
696 return 0;
697}
698
e145b35b
AV		 699static long ext4_ioctl_group_add(struct file *file,
700 struct ext4_new_group_data *input)
701{
702 struct super_block *sb = file_inode(file)->i_sb;
703 int err, err2=0;
704
705 err = ext4_resize_begin(sb);
706 if (err)
707 return err;
708
709 if (ext4_has_feature_bigalloc(sb)) {
710 ext4_msg(sb, KERN_ERR,
711 "Online resizing not supported with bigalloc");
712 err = -EOPNOTSUPP;
713 goto group_add_out;
714 }
715
716 err = mnt_want_write_file(file);
717 if (err)
718 goto group_add_out;
719
720 err = ext4_group_add(sb, input);
721 if (EXT4_SB(sb)->s_journal) {
722 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
723 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
724 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
725 }
726 if (err == 0)
727 err = err2;
728 mnt_drop_write_file(file);
729 if (!err && ext4_has_group_desc_csum(sb) &&
730 test_opt(sb, INIT_INODE_TABLE))
731 err = ext4_register_li_request(sb, input->group);
732group_add_out:
733 ext4_resize_end(sb);
734 return err;
735}
736
7b0e492e 737static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
dc7ac6c4 738{
7b0e492e 739 struct ext4_inode_info *ei = EXT4_I(inode);
dc7ac6c4 740
7b0e492e
DW		 741 simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags &
742 EXT4_FL_USER_VISIBLE));
dc7ac6c4 743
7b0e492e
DW		 744 if (ext4_has_feature_project(inode->i_sb))
745 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
dc7ac6c4
WS		 746}
747
bb5835ed
TT		 748/* copied from fs/ioctl.c */
749static int fiemap_check_ranges(struct super_block *sb,
750 u64 start, u64 len, u64 *new_len)
751{
752 u64 maxbytes = (u64) sb->s_maxbytes;
753
754 *new_len = len;
755
756 if (len == 0)
757 return -EINVAL;
758
759 if (start > maxbytes)
760 return -EFBIG;
761
762 /*
763 * Shrink request scope to what the fs can actually handle.
764 */
765 if (len > maxbytes || (maxbytes - len) < start)
766 *new_len = maxbytes - start;
767
768 return 0;
769}
770
771/* So that the fiemap access checks can't overflow on 32 bit machines. */
772#define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
773
774static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
775{
776 struct fiemap fiemap;
777 struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
778 struct fiemap_extent_info fieinfo = { 0, };
779 struct inode *inode = file_inode(filp);
780 struct super_block *sb = inode->i_sb;
781 u64 len;
782 int error;
783
784 if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
785 return -EFAULT;
786
787 if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
788 return -EINVAL;
789
790 error = fiemap_check_ranges(sb, fiemap.fm_start, fiemap.fm_length,
791 &len);
792 if (error)
793 return error;
794
795 fieinfo.fi_flags = fiemap.fm_flags;
796 fieinfo.fi_extents_max = fiemap.fm_extent_count;
797 fieinfo.fi_extents_start = ufiemap->fm_extents;
798
799 if (fiemap.fm_extent_count != 0 &&
800 !access_ok(fieinfo.fi_extents_start,
801 fieinfo.fi_extents_max * sizeof(struct fiemap_extent)))
802 return -EFAULT;
803
804 if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC)
805 filemap_write_and_wait(inode->i_mapping);
806
807 error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start, len);
808 fiemap.fm_flags = fieinfo.fi_flags;
809 fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
810 if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
811 error = -EFAULT;
812
813 return error;
814}
815
5cdd7b2d 816long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
ac27a0ec 817{
496ad9aa 818 struct inode *inode = file_inode(filp);
bab08ab9 819 struct super_block *sb = inode->i_sb;
617ba13b 820 struct ext4_inode_info *ei = EXT4_I(inode);
ac27a0ec 821 unsigned int flags;
ac27a0ec 822
af5bc92d 823 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
ac27a0ec
DK		 824
825 switch (cmd) {
0c9ec4be
DW		 826 case FS_IOC_GETFSMAP:
827 return ext4_ioc_getfsmap(sb, (void __user *)arg);
617ba13b
MC		 828 case EXT4_IOC_GETFLAGS:
829 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
7ddf79a1
WS		 830 if (S_ISREG(inode->i_mode))
831 flags &= ~EXT4_PROJINHERIT_FL;
ac27a0ec 832 return put_user(flags, (int __user *) arg);
617ba13b 833 case EXT4_IOC_SETFLAGS: {
9b7365fc 834 int err;
ac27a0ec 835
2e149670 836 if (!inode_owner_or_capable(inode))
ac27a0ec
DK		 837 return -EACCES;
838
839 if (get_user(flags, (int __user *) arg))
840 return -EFAULT;
841
d14e7683
JK		 842 if (flags & ~EXT4_FL_USER_VISIBLE)
843 return -EOPNOTSUPP;
844 /*
845 * chattr(1) grabs flags via GETFLAGS, modifies the result and
846 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
847 * more restrictive than just silently masking off visible but
848 * not settable flags as we always did.
849 */
850 flags &= EXT4_FL_USER_MODIFIABLE;
851 if (ext4_mask_flags(inode->i_mode, flags) != flags)
852 return -EOPNOTSUPP;
853
a561be71 854 err = mnt_want_write_file(filp);
42a74f20
DH		 855 if (err)
856 return err;
857
5955102c 858 inode_lock(inode);
2e538403
DW		 859 err = ext4_ioctl_check_immutable(inode,
860 from_kprojid(&init_user_ns, ei->i_projid),
861 flags);
862 if (!err)
863 err = ext4_ioctl_setflags(inode, flags);
5955102c 864 inode_unlock(inode);
2a79f17e 865 mnt_drop_write_file(filp);
ac27a0ec
DK		 866 return err;
867 }
617ba13b
MC		 868 case EXT4_IOC_GETVERSION:
869 case EXT4_IOC_GETVERSION_OLD:
ac27a0ec 870 return put_user(inode->i_generation, (int __user *) arg);
617ba13b
MC		 871 case EXT4_IOC_SETVERSION:
872 case EXT4_IOC_SETVERSION_OLD: {
ac27a0ec 873 handle_t *handle;
617ba13b 874 struct ext4_iloc iloc;
ac27a0ec
DK		 875 __u32 generation;
876 int err;
877
2e149670 878 if (!inode_owner_or_capable(inode))
ac27a0ec 879 return -EPERM;
42a74f20 880
9aa5d32b 881 if (ext4_has_metadata_csum(inode->i_sb)) {
814525f4
DW		 882 ext4_warning(sb, "Setting inode version is not "
883 "supported with metadata_csum enabled.");
884 return -ENOTTY;
885 }
886
a561be71 887 err = mnt_want_write_file(filp);
42a74f20
DH		 888 if (err)
889 return err;
890 if (get_user(generation, (int __user *) arg)) {
891 err = -EFAULT;
892 goto setversion_out;
893 }
ac27a0ec 894
5955102c 895 inode_lock(inode);
9924a92a 896 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
42a74f20
DH		 897 if (IS_ERR(handle)) {
898 err = PTR_ERR(handle);
6c2155b9 899 goto unlock_out;
42a74f20 900 }
617ba13b 901 err = ext4_reserve_inode_write(handle, inode, &iloc);
ac27a0ec 902 if (err == 0) {
eeca7ea1 903 inode->i_ctime = current_time(inode);
ac27a0ec 904 inode->i_generation = generation;
617ba13b 905 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
ac27a0ec 906 }
617ba13b 907 ext4_journal_stop(handle);
6c2155b9
DH		 908
909unlock_out:
5955102c 910 inode_unlock(inode);
42a74f20 911setversion_out:
2a79f17e 912 mnt_drop_write_file(filp);
ac27a0ec
DK		 913 return err;
914 }
617ba13b
MC		 915 case EXT4_IOC_GROUP_EXTEND: {
916 ext4_fsblk_t n_blocks_count;
ac046f1d 917 int err, err2=0;
ac27a0ec 918
8f82f840
YY		 919 err = ext4_resize_begin(sb);
920 if (err)
921 return err;
ac27a0ec 922
014a1770
DH		 923 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
924 err = -EFAULT;
925 goto group_extend_out;
926 }
ac27a0ec 927
e2b911c5 928 if (ext4_has_feature_bigalloc(sb)) {
bab08ab9
TT		 929 ext4_msg(sb, KERN_ERR,
930 "Online resizing not supported with bigalloc");
014a1770
DH		 931 err = -EOPNOTSUPP;
932 goto group_extend_out;
bab08ab9
TT		 933 }
934
a561be71 935 err = mnt_want_write_file(filp);
42a74f20 936 if (err)
014a1770 937 goto group_extend_out;
42a74f20 938
617ba13b 939 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
ac046f1d
PT		 940 if (EXT4_SB(sb)->s_journal) {
941 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
942 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
943 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
944 }
7ffe1ea8
HK		 945 if (err == 0)
946 err = err2;
2a79f17e 947 mnt_drop_write_file(filp);
014a1770 948group_extend_out:
8f82f840 949 ext4_resize_end(sb);
ac27a0ec
DK		 950 return err;
951 }
748de673
AF		 952
953 case EXT4_IOC_MOVE_EXT: {
954 struct move_extent me;
2903ff01
AV		 955 struct fd donor;
956 int err;
748de673 957
4a58579b
AF		 958 if (!(filp->f_mode & FMODE_READ) ||
959 !(filp->f_mode & FMODE_WRITE))
960 return -EBADF;
961
748de673
AF		 962 if (copy_from_user(&me,
963 (struct move_extent __user *)arg, sizeof(me)))
964 return -EFAULT;
4a58579b 965 me.moved_len = 0;
748de673 966
2903ff01
AV		 967 donor = fdget(me.donor_fd);
968 if (!donor.file)
748de673
AF		 969 return -EBADF;
970
2903ff01 971 if (!(donor.file->f_mode & FMODE_WRITE)) {
4a58579b
AF		 972 err = -EBADF;
973 goto mext_out;
748de673
AF		 974 }
975
e2b911c5 976 if (ext4_has_feature_bigalloc(sb)) {
bab08ab9
TT		 977 ext4_msg(sb, KERN_ERR,
978 "Online defrag not supported with bigalloc");
399c9b86
AV		 979 err = -EOPNOTSUPP;
980 goto mext_out;
73f34a5e
RZ		 981 } else if (IS_DAX(inode)) {
982 ext4_msg(sb, KERN_ERR,
983 "Online defrag not supported with DAX");
984 err = -EOPNOTSUPP;
985 goto mext_out;
bab08ab9
TT		 986 }
987
a561be71 988 err = mnt_want_write_file(filp);
4a58579b
AF		 989 if (err)
990 goto mext_out;
991
2903ff01 992 err = ext4_move_extents(filp, donor.file, me.orig_start,
748de673 993 me.donor_start, me.len, &me.moved_len);
2a79f17e 994 mnt_drop_write_file(filp);
748de673 995
60e6679e 996 if (copy_to_user((struct move_extent __user *)arg,
c437b273 997 &me, sizeof(me)))
4a58579b
AF		 998 err = -EFAULT;
999mext_out:
2903ff01 1000 fdput(donor);
748de673
AF		 1001 return err;
1002 }
1003
617ba13b
MC		 1004 case EXT4_IOC_GROUP_ADD: {
1005 struct ext4_new_group_data input;
ac27a0ec 1006
617ba13b 1007 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
e145b35b
AV		 1008 sizeof(input)))
1009 return -EFAULT;
42a74f20 1010
e145b35b 1011 return ext4_ioctl_group_add(filp, &input);
ac27a0ec
DK		 1012 }
1013
c14c6fd5 1014 case EXT4_IOC_MIGRATE:
2a43a878
AK		 1015 {
1016 int err;
2e149670 1017 if (!inode_owner_or_capable(inode))
2a43a878
AK		 1018 return -EACCES;
1019
a561be71 1020 err = mnt_want_write_file(filp);
2a43a878
AK		 1021 if (err)
1022 return err;
1023 /*
1024 * inode_mutex prevent write and truncate on the file.
1025 * Read still goes through. We take i_data_sem in
1026 * ext4_ext_swap_inode_data before we switch the
1027 * inode format to prevent read.
1028 */
5955102c 1029 inode_lock((inode));
2a43a878 1030 err = ext4_ext_migrate(inode);
5955102c 1031 inode_unlock((inode));
2a79f17e 1032 mnt_drop_write_file(filp);
2a43a878
AK		 1033 return err;
1034 }
c14c6fd5 1035
ccd2506b
TT		 1036 case EXT4_IOC_ALLOC_DA_BLKS:
1037 {
1038 int err;
2e149670 1039 if (!inode_owner_or_capable(inode))
ccd2506b
TT		 1040 return -EACCES;
1041
a561be71 1042 err = mnt_want_write_file(filp);
ccd2506b
TT		 1043 if (err)
1044 return err;
1045 err = ext4_alloc_da_blocks(inode);
2a79f17e 1046 mnt_drop_write_file(filp);
ccd2506b
TT		 1047 return err;
1048 }
1049
393d1d1d 1050 case EXT4_IOC_SWAP_BOOT:
3e67cfad
DM		 1051 {
1052 int err;
393d1d1d
DTB		 1053 if (!(filp->f_mode & FMODE_WRITE))
1054 return -EBADF;
3e67cfad
DM		 1055 err = mnt_want_write_file(filp);
1056 if (err)
1057 return err;
1058 err = swap_inode_boot_loader(sb, inode);
1059 mnt_drop_write_file(filp);
1060 return err;
1061 }
393d1d1d 1062
19c5246d
YY		 1063 case EXT4_IOC_RESIZE_FS: {
1064 ext4_fsblk_t n_blocks_count;
19c5246d 1065 int err = 0, err2 = 0;
7f511862 1066 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
19c5246d 1067
19c5246d
YY		 1068 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
1069 sizeof(__u64))) {
1070 return -EFAULT;
1071 }
1072
19c5246d
YY		 1073 err = ext4_resize_begin(sb);
1074 if (err)
1075 return err;
1076
8cae6f71 1077 err = mnt_want_write_file(filp);
19c5246d
YY		 1078 if (err)
1079 goto resizefs_out;
1080
1081 err = ext4_resize_fs(sb, n_blocks_count);
1082 if (EXT4_SB(sb)->s_journal) {
1083 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1084 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
1085 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1086 }
1087 if (err == 0)
1088 err = err2;
8cae6f71 1089 mnt_drop_write_file(filp);
310a997f 1090 if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
7f511862
TT		 1091 ext4_has_group_desc_csum(sb) &&
1092 test_opt(sb, INIT_INODE_TABLE))
1093 err = ext4_register_li_request(sb, o_group);
1094
19c5246d
YY		 1095resizefs_out:
1096 ext4_resize_end(sb);
1097 return err;
1098 }
1099
e681c047
LC		 1100 case FITRIM:
1101 {
41431792 1102 struct request_queue *q = bdev_get_queue(sb->s_bdev);
e681c047
LC		 1103 struct fstrim_range range;
1104 int ret = 0;
1105
1106 if (!capable(CAP_SYS_ADMIN))
1107 return -EPERM;
1108
41431792
LC		 1109 if (!blk_queue_discard(q))
1110 return -EOPNOTSUPP;
1111
18915b58
DW		 1112 /*
1113 * We haven't replayed the journal, so we cannot use our
1114 * block-bitmap-guided storage zapping commands.
1115 */
1116 if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
1117 return -EROFS;
1118
e6705f7c 1119 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
e681c047
LC		 1120 sizeof(range)))
1121 return -EFAULT;
1122
5c2ed62f
LC		 1123 range.minlen = max((unsigned int)range.minlen,
1124 q->limits.discard_granularity);
e681c047
LC		 1125 ret = ext4_trim_fs(sb, &range);
1126 if (ret < 0)
1127 return ret;
1128
e6705f7c 1129 if (copy_to_user((struct fstrim_range __user *)arg, &range,
e681c047
LC		 1130 sizeof(range)))
1131 return -EFAULT;
1132
1133 return 0;
1134 }
7869a4a6
TT		 1135 case EXT4_IOC_PRECACHE_EXTENTS:
1136 return ext4_ext_precache(inode);
9bd8212f 1137
db717d8e 1138 case EXT4_IOC_SET_ENCRYPTION_POLICY:
9a200d07
RW		 1139 if (!ext4_has_feature_encrypt(sb))
1140 return -EOPNOTSUPP;
db717d8e 1141 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
9a200d07 1142
9bd8212f 1143 case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
643fa961 1144#ifdef CONFIG_FS_ENCRYPTION
9bd8212f
MH		 1145 int err, err2;
1146 struct ext4_sb_info *sbi = EXT4_SB(sb);
1147 handle_t *handle;
1148
35997d1c 1149 if (!ext4_has_feature_encrypt(sb))
9bd8212f
MH		 1150 return -EOPNOTSUPP;
1151 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
1152 err = mnt_want_write_file(filp);
1153 if (err)
1154 return err;
1155 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
1156 if (IS_ERR(handle)) {
1157 err = PTR_ERR(handle);
1158 goto pwsalt_err_exit;
1159 }
1160 err = ext4_journal_get_write_access(handle, sbi->s_sbh);
1161 if (err)
1162 goto pwsalt_err_journal;
1163 generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
1164 err = ext4_handle_dirty_metadata(handle, NULL,
1165 sbi->s_sbh);
1166 pwsalt_err_journal:
1167 err2 = ext4_journal_stop(handle);
1168 if (err2 && !err)
1169 err = err2;
1170 pwsalt_err_exit:
1171 mnt_drop_write_file(filp);
1172 if (err)
1173 return err;
1174 }
b4ab9e29
FF		 1175 if (copy_to_user((void __user *) arg,
1176 sbi->s_es->s_encrypt_pw_salt, 16))
9bd8212f
MH		 1177 return -EFAULT;
1178 return 0;
ba679017
EB		 1179#else
1180 return -EOPNOTSUPP;
1181#endif
9bd8212f 1182 }
db717d8e 1183 case EXT4_IOC_GET_ENCRYPTION_POLICY:
0642ea24
CY		 1184 if (!ext4_has_feature_encrypt(sb))
1185 return -EOPNOTSUPP;
db717d8e 1186 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
9bd8212f 1187
29b3692e
EB		 1188 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1189 if (!ext4_has_feature_encrypt(sb))
1190 return -EOPNOTSUPP;
1191 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1192
1193 case FS_IOC_ADD_ENCRYPTION_KEY:
1194 if (!ext4_has_feature_encrypt(sb))
1195 return -EOPNOTSUPP;
1196 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1197
1198 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1199 if (!ext4_has_feature_encrypt(sb))
1200 return -EOPNOTSUPP;
1201 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1202
1203 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1204 if (!ext4_has_feature_encrypt(sb))
1205 return -EOPNOTSUPP;
1206 return fscrypt_ioctl_remove_key_all_users(filp,
1207 (void __user *)arg);
1208 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1209 if (!ext4_has_feature_encrypt(sb))
1210 return -EOPNOTSUPP;
1211 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1212
b0c013e2
TT		 1213 case EXT4_IOC_CLEAR_ES_CACHE:
1214 {
1215 if (!inode_owner_or_capable(inode))
1216 return -EACCES;
1217 ext4_clear_inode_es(inode);
1218 return 0;
1219 }
1220
1ad3ea6e
TT		 1221 case EXT4_IOC_GETSTATE:
1222 {
1223 __u32 state = 0;
1224
1225 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1226 state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1227 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1228 state |= EXT4_STATE_FLAG_NEW;
1229 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1230 state |= EXT4_STATE_FLAG_NEWENTRY;
1231 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1232 state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1233
1234 return put_user(state, (__u32 __user *) arg);
1235 }
1236
bb5835ed
TT		 1237 case EXT4_IOC_GET_ES_CACHE:
1238 return ext4_ioctl_get_es_cache(filp, arg);
1239
9b7365fc
LX		 1240 case EXT4_IOC_FSGETXATTR:
1241 {
1242 struct fsxattr fa;
1243
7b0e492e 1244 ext4_fill_fsxattr(inode, &fa);
9b7365fc
LX		 1245
1246 if (copy_to_user((struct fsxattr __user *)arg,
1247 &fa, sizeof(fa)))
1248 return -EFAULT;
1249 return 0;
1250 }
1251 case EXT4_IOC_FSSETXATTR:
1252 {
7b0e492e 1253 struct fsxattr fa, old_fa;
9b7365fc
LX		 1254 int err;
1255
1256 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
1257 sizeof(fa)))
1258 return -EFAULT;
1259
1260 /* Make sure caller has proper permission */
1261 if (!inode_owner_or_capable(inode))
1262 return -EACCES;
1263
d14e7683
JK		 1264 if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
1265 return -EOPNOTSUPP;
1266
1267 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
1268 if (ext4_mask_flags(inode->i_mode, flags) != flags)
1269 return -EOPNOTSUPP;
1270
9b7365fc
LX		 1271 err = mnt_want_write_file(filp);
1272 if (err)
1273 return err;
1274
5955102c 1275 inode_lock(inode);
7b0e492e 1276 ext4_fill_fsxattr(inode, &old_fa);
7b0e492e 1277 err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
dc7ac6c4
WS		 1278 if (err)
1279 goto out;
9b7365fc
LX		 1280 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
1281 (flags & EXT4_FL_XFLAG_VISIBLE);
2e538403
DW		 1282 err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags);
1283 if (err)
1284 goto out;
9b7365fc 1285 err = ext4_ioctl_setflags(inode, flags);
9b7365fc 1286 if (err)
dc7ac6c4 1287 goto out;
9b7365fc 1288 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
dc7ac6c4
WS		 1289out:
1290 inode_unlock(inode);
1291 mnt_drop_write_file(filp);
1292 return err;
9b7365fc 1293 }
e9be2ac7
TT		 1294 case EXT4_IOC_SHUTDOWN:
1295 return ext4_shutdown(sb, arg);
c93d8f88
EB		 1296
1297 case FS_IOC_ENABLE_VERITY:
1298 if (!ext4_has_feature_verity(sb))
1299 return -EOPNOTSUPP;
1300 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1301
1302 case FS_IOC_MEASURE_VERITY:
1303 if (!ext4_has_feature_verity(sb))
1304 return -EOPNOTSUPP;
1305 return fsverity_ioctl_measure(filp, (void __user *)arg);
1306
ac27a0ec
DK		 1307 default:
1308 return -ENOTTY;
1309 }
1310}
1311
1312#ifdef CONFIG_COMPAT
617ba13b 1313long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
ac27a0ec 1314{
ac27a0ec
DK		 1315 /* These are just misnamed, they actually get/put from/to user an int */
1316 switch (cmd) {
617ba13b
MC		 1317 case EXT4_IOC32_GETFLAGS:
1318 cmd = EXT4_IOC_GETFLAGS;
ac27a0ec 1319 break;
617ba13b
MC		 1320 case EXT4_IOC32_SETFLAGS:
1321 cmd = EXT4_IOC_SETFLAGS;
ac27a0ec 1322 break;
617ba13b
MC		 1323 case EXT4_IOC32_GETVERSION:
1324 cmd = EXT4_IOC_GETVERSION;
ac27a0ec 1325 break;
617ba13b
MC		 1326 case EXT4_IOC32_SETVERSION:
1327 cmd = EXT4_IOC_SETVERSION;
ac27a0ec 1328 break;
617ba13b
MC		 1329 case EXT4_IOC32_GROUP_EXTEND:
1330 cmd = EXT4_IOC_GROUP_EXTEND;
ac27a0ec 1331 break;
617ba13b
MC		 1332 case EXT4_IOC32_GETVERSION_OLD:
1333 cmd = EXT4_IOC_GETVERSION_OLD;
ac27a0ec 1334 break;
617ba13b
MC		 1335 case EXT4_IOC32_SETVERSION_OLD:
1336 cmd = EXT4_IOC_SETVERSION_OLD;
ac27a0ec 1337 break;
617ba13b
MC		 1338 case EXT4_IOC32_GETRSVSZ:
1339 cmd = EXT4_IOC_GETRSVSZ;
ac27a0ec 1340 break;
617ba13b
MC		 1341 case EXT4_IOC32_SETRSVSZ:
1342 cmd = EXT4_IOC_SETRSVSZ;
ac27a0ec 1343 break;
4d92dc0f
BH		 1344 case EXT4_IOC32_GROUP_ADD: {
1345 struct compat_ext4_new_group_input __user *uinput;
e145b35b 1346 struct ext4_new_group_data input;
4d92dc0f
BH		 1347 int err;
1348
1349 uinput = compat_ptr(arg);
1350 err = get_user(input.group, &uinput->group);
1351 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1352 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1353 err |= get_user(input.inode_table, &uinput->inode_table);
1354 err |= get_user(input.blocks_count, &uinput->blocks_count);
1355 err |= get_user(input.reserved_blocks,
1356 &uinput->reserved_blocks);
1357 if (err)
1358 return -EFAULT;
e145b35b 1359 return ext4_ioctl_group_add(file, &input);
4d92dc0f 1360 }
b684b2ee 1361 case EXT4_IOC_MOVE_EXT:
19c5246d 1362 case EXT4_IOC_RESIZE_FS:
7869a4a6 1363 case EXT4_IOC_PRECACHE_EXTENTS:
9bd8212f
MH		 1364 case EXT4_IOC_SET_ENCRYPTION_POLICY:
1365 case EXT4_IOC_GET_ENCRYPTION_PWSALT:
1366 case EXT4_IOC_GET_ENCRYPTION_POLICY:
29b3692e
EB		 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:
e9be2ac7 1372 case EXT4_IOC_SHUTDOWN:
0c9ec4be 1373 case FS_IOC_GETFSMAP:
c93d8f88
EB		 1374 case FS_IOC_ENABLE_VERITY:
1375 case FS_IOC_MEASURE_VERITY:
b0c013e2 1376 case EXT4_IOC_CLEAR_ES_CACHE:
1ad3ea6e 1377 case EXT4_IOC_GETSTATE:
bb5835ed 1378 case EXT4_IOC_GET_ES_CACHE:
b684b2ee 1379 break;
ac27a0ec
DK		 1380 default:
1381 return -ENOIOCTLCMD;
1382 }
5cdd7b2d 1383 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
ac27a0ec
DK		 1384}
1385#endif
Linux 6.x block layer and io_uring tree(s)