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1/*
2 * linux/fs/ext4/ioctl.c
3 *
4 * Copyright (C) 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
8 */
9
10#include <linux/fs.h>
11#include <linux/capability.h>
12#include <linux/time.h>
13#include <linux/compat.h>
14#include <linux/mount.h>
15#include <linux/file.h>
16#include <linux/random.h>
17#include <linux/quotaops.h>
18#include <asm/uaccess.h>
19#include "ext4_jbd2.h"
20#include "ext4.h"
21
22#define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1)
23
24/**
25 * Swap memory between @a and @b for @len bytes.
26 *
27 * @a: pointer to first memory area
28 * @b: pointer to second memory area
29 * @len: number of bytes to swap
30 *
31 */
32static void memswap(void *a, void *b, size_t len)
33{
34 unsigned char *ap, *bp;
35
36 ap = (unsigned char *)a;
37 bp = (unsigned char *)b;
38 while (len-- > 0) {
39 swap(*ap, *bp);
40 ap++;
41 bp++;
42 }
43}
44
45/**
46 * Swap i_data and associated attributes between @inode1 and @inode2.
47 * This function is used for the primary swap between inode1 and inode2
48 * and also to revert this primary swap in case of errors.
49 *
50 * Therefore you have to make sure, that calling this method twice
51 * will revert all changes.
52 *
53 * @inode1: pointer to first inode
54 * @inode2: pointer to second inode
55 */
56static void swap_inode_data(struct inode *inode1, struct inode *inode2)
57{
58 loff_t isize;
59 struct ext4_inode_info *ei1;
60 struct ext4_inode_info *ei2;
61
62 ei1 = EXT4_I(inode1);
63 ei2 = EXT4_I(inode2);
64
65 memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags));
66 memswap(&inode1->i_version, &inode2->i_version,
67 sizeof(inode1->i_version));
68 memswap(&inode1->i_blocks, &inode2->i_blocks,
69 sizeof(inode1->i_blocks));
70 memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes));
71 memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime));
72 memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime));
73
74 memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
75 memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags));
76 memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize));
77 ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
78 ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
79
80 isize = i_size_read(inode1);
81 i_size_write(inode1, i_size_read(inode2));
82 i_size_write(inode2, isize);
83}
84
85/**
86 * Swap the information from the given @inode and the inode
87 * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
88 * important fields of the inodes.
89 *
90 * @sb: the super block of the filesystem
91 * @inode: the inode to swap with EXT4_BOOT_LOADER_INO
92 *
93 */
94static long swap_inode_boot_loader(struct super_block *sb,
95 struct inode *inode)
96{
97 handle_t *handle;
98 int err;
99 struct inode *inode_bl;
100 struct ext4_inode_info *ei_bl;
101 struct ext4_sb_info *sbi = EXT4_SB(sb);
102
103 if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode))
104 return -EINVAL;
105
106 if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN))
107 return -EPERM;
108
109 inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO);
110 if (IS_ERR(inode_bl))
111 return PTR_ERR(inode_bl);
112 ei_bl = EXT4_I(inode_bl);
113
114 filemap_flush(inode->i_mapping);
115 filemap_flush(inode_bl->i_mapping);
116
117 /* Protect orig inodes against a truncate and make sure,
118 * that only 1 swap_inode_boot_loader is running. */
119 lock_two_nondirectories(inode, inode_bl);
120
121 truncate_inode_pages(&inode->i_data, 0);
122 truncate_inode_pages(&inode_bl->i_data, 0);
123
124 /* Wait for all existing dio workers */
125 ext4_inode_block_unlocked_dio(inode);
126 ext4_inode_block_unlocked_dio(inode_bl);
127 inode_dio_wait(inode);
128 inode_dio_wait(inode_bl);
129
130 handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
131 if (IS_ERR(handle)) {
132 err = -EINVAL;
133 goto journal_err_out;
134 }
135
136 /* Protect extent tree against block allocations via delalloc */
137 ext4_double_down_write_data_sem(inode, inode_bl);
138
139 if (inode_bl->i_nlink == 0) {
140 /* this inode has never been used as a BOOT_LOADER */
141 set_nlink(inode_bl, 1);
142 i_uid_write(inode_bl, 0);
143 i_gid_write(inode_bl, 0);
144 inode_bl->i_flags = 0;
145 ei_bl->i_flags = 0;
146 inode_bl->i_version = 1;
147 i_size_write(inode_bl, 0);
148 inode_bl->i_mode = S_IFREG;
149 if (ext4_has_feature_extents(sb)) {
150 ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
151 ext4_ext_tree_init(handle, inode_bl);
152 } else
153 memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
154 }
155
156 swap_inode_data(inode, inode_bl);
157
158 inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode);
159
160 spin_lock(&sbi->s_next_gen_lock);
161 inode->i_generation = sbi->s_next_generation++;
162 inode_bl->i_generation = sbi->s_next_generation++;
163 spin_unlock(&sbi->s_next_gen_lock);
164
165 ext4_discard_preallocations(inode);
166
167 err = ext4_mark_inode_dirty(handle, inode);
168 if (err < 0) {
169 ext4_warning(inode->i_sb,
170 "couldn't mark inode #%lu dirty (err %d)",
171 inode->i_ino, err);
172 /* Revert all changes: */
173 swap_inode_data(inode, inode_bl);
174 } else {
175 err = ext4_mark_inode_dirty(handle, inode_bl);
176 if (err < 0) {
177 ext4_warning(inode_bl->i_sb,
178 "couldn't mark inode #%lu dirty (err %d)",
179 inode_bl->i_ino, err);
180 /* Revert all changes: */
181 swap_inode_data(inode, inode_bl);
182 ext4_mark_inode_dirty(handle, inode);
183 }
184 }
185 ext4_journal_stop(handle);
186 ext4_double_up_write_data_sem(inode, inode_bl);
187
188journal_err_out:
189 ext4_inode_resume_unlocked_dio(inode);
190 ext4_inode_resume_unlocked_dio(inode_bl);
191 unlock_two_nondirectories(inode, inode_bl);
192 iput(inode_bl);
193 return err;
194}
195
196static int uuid_is_zero(__u8 u[16])
197{
198 int i;
199
200 for (i = 0; i < 16; i++)
201 if (u[i])
202 return 0;
203 return 1;
204}
205
206static int ext4_ioctl_setflags(struct inode *inode,
207 unsigned int flags)
208{
209 struct ext4_inode_info *ei = EXT4_I(inode);
210 handle_t *handle = NULL;
211 int err = -EPERM, migrate = 0;
212 struct ext4_iloc iloc;
213 unsigned int oldflags, mask, i;
214 unsigned int jflag;
215
216 /* Is it quota file? Do not allow user to mess with it */
217 if (IS_NOQUOTA(inode))
218 goto flags_out;
219
220 oldflags = ei->i_flags;
221
222 /* The JOURNAL_DATA flag is modifiable only by root */
223 jflag = flags & EXT4_JOURNAL_DATA_FL;
224
225 /*
226 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
227 * the relevant capability.
228 *
229 * This test looks nicer. Thanks to Pauline Middelink
230 */
231 if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
232 if (!capable(CAP_LINUX_IMMUTABLE))
233 goto flags_out;
234 }
235
236 /*
237 * The JOURNAL_DATA flag can only be changed by
238 * the relevant capability.
239 */
240 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
241 if (!capable(CAP_SYS_RESOURCE))
242 goto flags_out;
243 }
244 if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
245 migrate = 1;
246
247 if (flags & EXT4_EOFBLOCKS_FL) {
248 /* we don't support adding EOFBLOCKS flag */
249 if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
250 err = -EOPNOTSUPP;
251 goto flags_out;
252 }
253 } else if (oldflags & EXT4_EOFBLOCKS_FL)
254 ext4_truncate(inode);
255
256 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
257 if (IS_ERR(handle)) {
258 err = PTR_ERR(handle);
259 goto flags_out;
260 }
261 if (IS_SYNC(inode))
262 ext4_handle_sync(handle);
263 err = ext4_reserve_inode_write(handle, inode, &iloc);
264 if (err)
265 goto flags_err;
266
267 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
268 if (!(mask & EXT4_FL_USER_MODIFIABLE))
269 continue;
270 if (mask & flags)
271 ext4_set_inode_flag(inode, i);
272 else
273 ext4_clear_inode_flag(inode, i);
274 }
275
276 ext4_set_inode_flags(inode);
277 inode->i_ctime = ext4_current_time(inode);
278
279 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
280flags_err:
281 ext4_journal_stop(handle);
282 if (err)
283 goto flags_out;
284
285 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
286 err = ext4_change_inode_journal_flag(inode, jflag);
287 if (err)
288 goto flags_out;
289 if (migrate) {
290 if (flags & EXT4_EXTENTS_FL)
291 err = ext4_ext_migrate(inode);
292 else
293 err = ext4_ind_migrate(inode);
294 }
295
296flags_out:
297 return err;
298}
299
300#ifdef CONFIG_QUOTA
301static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
302{
303 struct inode *inode = file_inode(filp);
304 struct super_block *sb = inode->i_sb;
305 struct ext4_inode_info *ei = EXT4_I(inode);
306 int err, rc;
307 handle_t *handle;
308 kprojid_t kprojid;
309 struct ext4_iloc iloc;
310 struct ext4_inode *raw_inode;
311
312 if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
313 EXT4_FEATURE_RO_COMPAT_PROJECT)) {
314 if (projid != EXT4_DEF_PROJID)
315 return -EOPNOTSUPP;
316 else
317 return 0;
318 }
319
320 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
321 return -EOPNOTSUPP;
322
323 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
324
325 if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
326 return 0;
327
328 err = mnt_want_write_file(filp);
329 if (err)
330 return err;
331
332 err = -EPERM;
333 inode_lock(inode);
334 /* Is it quota file? Do not allow user to mess with it */
335 if (IS_NOQUOTA(inode))
336 goto out_unlock;
337
338 err = ext4_get_inode_loc(inode, &iloc);
339 if (err)
340 goto out_unlock;
341
342 raw_inode = ext4_raw_inode(&iloc);
343 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
344 err = -EOVERFLOW;
345 brelse(iloc.bh);
346 goto out_unlock;
347 }
348 brelse(iloc.bh);
349
350 dquot_initialize(inode);
351
352 handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
353 EXT4_QUOTA_INIT_BLOCKS(sb) +
354 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
355 if (IS_ERR(handle)) {
356 err = PTR_ERR(handle);
357 goto out_unlock;
358 }
359
360 err = ext4_reserve_inode_write(handle, inode, &iloc);
361 if (err)
362 goto out_stop;
363
364 if (sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
365 struct dquot *transfer_to[MAXQUOTAS] = { };
366
367 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
368 if (transfer_to[PRJQUOTA]) {
369 err = __dquot_transfer(inode, transfer_to);
370 dqput(transfer_to[PRJQUOTA]);
371 if (err)
372 goto out_dirty;
373 }
374 }
375 EXT4_I(inode)->i_projid = kprojid;
376 inode->i_ctime = ext4_current_time(inode);
377out_dirty:
378 rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
379 if (!err)
380 err = rc;
381out_stop:
382 ext4_journal_stop(handle);
383out_unlock:
384 inode_unlock(inode);
385 mnt_drop_write_file(filp);
386 return err;
387}
388#else
389static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
390{
391 if (projid != EXT4_DEF_PROJID)
392 return -EOPNOTSUPP;
393 return 0;
394}
395#endif
396
397/* Transfer internal flags to xflags */
398static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
399{
400 __u32 xflags = 0;
401
402 if (iflags & EXT4_SYNC_FL)
403 xflags |= FS_XFLAG_SYNC;
404 if (iflags & EXT4_IMMUTABLE_FL)
405 xflags |= FS_XFLAG_IMMUTABLE;
406 if (iflags & EXT4_APPEND_FL)
407 xflags |= FS_XFLAG_APPEND;
408 if (iflags & EXT4_NODUMP_FL)
409 xflags |= FS_XFLAG_NODUMP;
410 if (iflags & EXT4_NOATIME_FL)
411 xflags |= FS_XFLAG_NOATIME;
412 if (iflags & EXT4_PROJINHERIT_FL)
413 xflags |= FS_XFLAG_PROJINHERIT;
414 return xflags;
415}
416
417/* Transfer xflags flags to internal */
418static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
419{
420 unsigned long iflags = 0;
421
422 if (xflags & FS_XFLAG_SYNC)
423 iflags |= EXT4_SYNC_FL;
424 if (xflags & FS_XFLAG_IMMUTABLE)
425 iflags |= EXT4_IMMUTABLE_FL;
426 if (xflags & FS_XFLAG_APPEND)
427 iflags |= EXT4_APPEND_FL;
428 if (xflags & FS_XFLAG_NODUMP)
429 iflags |= EXT4_NODUMP_FL;
430 if (xflags & FS_XFLAG_NOATIME)
431 iflags |= EXT4_NOATIME_FL;
432 if (xflags & FS_XFLAG_PROJINHERIT)
433 iflags |= EXT4_PROJINHERIT_FL;
434
435 return iflags;
436}
437
438long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
439{
440 struct inode *inode = file_inode(filp);
441 struct super_block *sb = inode->i_sb;
442 struct ext4_inode_info *ei = EXT4_I(inode);
443 unsigned int flags;
444
445 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
446
447 switch (cmd) {
448 case EXT4_IOC_GETFLAGS:
449 ext4_get_inode_flags(ei);
450 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
451 return put_user(flags, (int __user *) arg);
452 case EXT4_IOC_SETFLAGS: {
453 int err;
454
455 if (!inode_owner_or_capable(inode))
456 return -EACCES;
457
458 if (get_user(flags, (int __user *) arg))
459 return -EFAULT;
460
461 err = mnt_want_write_file(filp);
462 if (err)
463 return err;
464
465 flags = ext4_mask_flags(inode->i_mode, flags);
466
467 inode_lock(inode);
468 err = ext4_ioctl_setflags(inode, flags);
469 inode_unlock(inode);
470 mnt_drop_write_file(filp);
471 return err;
472 }
473 case EXT4_IOC_GETVERSION:
474 case EXT4_IOC_GETVERSION_OLD:
475 return put_user(inode->i_generation, (int __user *) arg);
476 case EXT4_IOC_SETVERSION:
477 case EXT4_IOC_SETVERSION_OLD: {
478 handle_t *handle;
479 struct ext4_iloc iloc;
480 __u32 generation;
481 int err;
482
483 if (!inode_owner_or_capable(inode))
484 return -EPERM;
485
486 if (ext4_has_metadata_csum(inode->i_sb)) {
487 ext4_warning(sb, "Setting inode version is not "
488 "supported with metadata_csum enabled.");
489 return -ENOTTY;
490 }
491
492 err = mnt_want_write_file(filp);
493 if (err)
494 return err;
495 if (get_user(generation, (int __user *) arg)) {
496 err = -EFAULT;
497 goto setversion_out;
498 }
499
500 inode_lock(inode);
501 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
502 if (IS_ERR(handle)) {
503 err = PTR_ERR(handle);
504 goto unlock_out;
505 }
506 err = ext4_reserve_inode_write(handle, inode, &iloc);
507 if (err == 0) {
508 inode->i_ctime = ext4_current_time(inode);
509 inode->i_generation = generation;
510 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
511 }
512 ext4_journal_stop(handle);
513
514unlock_out:
515 inode_unlock(inode);
516setversion_out:
517 mnt_drop_write_file(filp);
518 return err;
519 }
520 case EXT4_IOC_GROUP_EXTEND: {
521 ext4_fsblk_t n_blocks_count;
522 int err, err2=0;
523
524 err = ext4_resize_begin(sb);
525 if (err)
526 return err;
527
528 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
529 err = -EFAULT;
530 goto group_extend_out;
531 }
532
533 if (ext4_has_feature_bigalloc(sb)) {
534 ext4_msg(sb, KERN_ERR,
535 "Online resizing not supported with bigalloc");
536 err = -EOPNOTSUPP;
537 goto group_extend_out;
538 }
539
540 err = mnt_want_write_file(filp);
541 if (err)
542 goto group_extend_out;
543
544 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
545 if (EXT4_SB(sb)->s_journal) {
546 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
547 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
548 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
549 }
550 if (err == 0)
551 err = err2;
552 mnt_drop_write_file(filp);
553group_extend_out:
554 ext4_resize_end(sb);
555 return err;
556 }
557
558 case EXT4_IOC_MOVE_EXT: {
559 struct move_extent me;
560 struct fd donor;
561 int err;
562
563 if (!(filp->f_mode & FMODE_READ) ||
564 !(filp->f_mode & FMODE_WRITE))
565 return -EBADF;
566
567 if (copy_from_user(&me,
568 (struct move_extent __user *)arg, sizeof(me)))
569 return -EFAULT;
570 me.moved_len = 0;
571
572 donor = fdget(me.donor_fd);
573 if (!donor.file)
574 return -EBADF;
575
576 if (!(donor.file->f_mode & FMODE_WRITE)) {
577 err = -EBADF;
578 goto mext_out;
579 }
580
581 if (ext4_has_feature_bigalloc(sb)) {
582 ext4_msg(sb, KERN_ERR,
583 "Online defrag not supported with bigalloc");
584 err = -EOPNOTSUPP;
585 goto mext_out;
586 } else if (IS_DAX(inode)) {
587 ext4_msg(sb, KERN_ERR,
588 "Online defrag not supported with DAX");
589 err = -EOPNOTSUPP;
590 goto mext_out;
591 }
592
593 err = mnt_want_write_file(filp);
594 if (err)
595 goto mext_out;
596
597 err = ext4_move_extents(filp, donor.file, me.orig_start,
598 me.donor_start, me.len, &me.moved_len);
599 mnt_drop_write_file(filp);
600
601 if (copy_to_user((struct move_extent __user *)arg,
602 &me, sizeof(me)))
603 err = -EFAULT;
604mext_out:
605 fdput(donor);
606 return err;
607 }
608
609 case EXT4_IOC_GROUP_ADD: {
610 struct ext4_new_group_data input;
611 int err, err2=0;
612
613 err = ext4_resize_begin(sb);
614 if (err)
615 return err;
616
617 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
618 sizeof(input))) {
619 err = -EFAULT;
620 goto group_add_out;
621 }
622
623 if (ext4_has_feature_bigalloc(sb)) {
624 ext4_msg(sb, KERN_ERR,
625 "Online resizing not supported with bigalloc");
626 err = -EOPNOTSUPP;
627 goto group_add_out;
628 }
629
630 err = mnt_want_write_file(filp);
631 if (err)
632 goto group_add_out;
633
634 err = ext4_group_add(sb, &input);
635 if (EXT4_SB(sb)->s_journal) {
636 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
637 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
638 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
639 }
640 if (err == 0)
641 err = err2;
642 mnt_drop_write_file(filp);
643 if (!err && ext4_has_group_desc_csum(sb) &&
644 test_opt(sb, INIT_INODE_TABLE))
645 err = ext4_register_li_request(sb, input.group);
646group_add_out:
647 ext4_resize_end(sb);
648 return err;
649 }
650
651 case EXT4_IOC_MIGRATE:
652 {
653 int err;
654 if (!inode_owner_or_capable(inode))
655 return -EACCES;
656
657 err = mnt_want_write_file(filp);
658 if (err)
659 return err;
660 /*
661 * inode_mutex prevent write and truncate on the file.
662 * Read still goes through. We take i_data_sem in
663 * ext4_ext_swap_inode_data before we switch the
664 * inode format to prevent read.
665 */
666 inode_lock((inode));
667 err = ext4_ext_migrate(inode);
668 inode_unlock((inode));
669 mnt_drop_write_file(filp);
670 return err;
671 }
672
673 case EXT4_IOC_ALLOC_DA_BLKS:
674 {
675 int err;
676 if (!inode_owner_or_capable(inode))
677 return -EACCES;
678
679 err = mnt_want_write_file(filp);
680 if (err)
681 return err;
682 err = ext4_alloc_da_blocks(inode);
683 mnt_drop_write_file(filp);
684 return err;
685 }
686
687 case EXT4_IOC_SWAP_BOOT:
688 {
689 int err;
690 if (!(filp->f_mode & FMODE_WRITE))
691 return -EBADF;
692 err = mnt_want_write_file(filp);
693 if (err)
694 return err;
695 err = swap_inode_boot_loader(sb, inode);
696 mnt_drop_write_file(filp);
697 return err;
698 }
699
700 case EXT4_IOC_RESIZE_FS: {
701 ext4_fsblk_t n_blocks_count;
702 int err = 0, err2 = 0;
703 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
704
705 if (ext4_has_feature_bigalloc(sb)) {
706 ext4_msg(sb, KERN_ERR,
707 "Online resizing not (yet) supported with bigalloc");
708 return -EOPNOTSUPP;
709 }
710
711 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
712 sizeof(__u64))) {
713 return -EFAULT;
714 }
715
716 err = ext4_resize_begin(sb);
717 if (err)
718 return err;
719
720 err = mnt_want_write_file(filp);
721 if (err)
722 goto resizefs_out;
723
724 err = ext4_resize_fs(sb, n_blocks_count);
725 if (EXT4_SB(sb)->s_journal) {
726 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
727 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
728 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
729 }
730 if (err == 0)
731 err = err2;
732 mnt_drop_write_file(filp);
733 if (!err && (o_group > EXT4_SB(sb)->s_groups_count) &&
734 ext4_has_group_desc_csum(sb) &&
735 test_opt(sb, INIT_INODE_TABLE))
736 err = ext4_register_li_request(sb, o_group);
737
738resizefs_out:
739 ext4_resize_end(sb);
740 return err;
741 }
742
743 case FITRIM:
744 {
745 struct request_queue *q = bdev_get_queue(sb->s_bdev);
746 struct fstrim_range range;
747 int ret = 0;
748
749 if (!capable(CAP_SYS_ADMIN))
750 return -EPERM;
751
752 if (!blk_queue_discard(q))
753 return -EOPNOTSUPP;
754
755 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
756 sizeof(range)))
757 return -EFAULT;
758
759 range.minlen = max((unsigned int)range.minlen,
760 q->limits.discard_granularity);
761 ret = ext4_trim_fs(sb, &range);
762 if (ret < 0)
763 return ret;
764
765 if (copy_to_user((struct fstrim_range __user *)arg, &range,
766 sizeof(range)))
767 return -EFAULT;
768
769 return 0;
770 }
771 case EXT4_IOC_PRECACHE_EXTENTS:
772 return ext4_ext_precache(inode);
773 case EXT4_IOC_SET_ENCRYPTION_POLICY: {
774#ifdef CONFIG_EXT4_FS_ENCRYPTION
775 struct ext4_encryption_policy policy;
776 int err = 0;
777
778 if (copy_from_user(&policy,
779 (struct ext4_encryption_policy __user *)arg,
780 sizeof(policy))) {
781 err = -EFAULT;
782 goto encryption_policy_out;
783 }
784
785 err = ext4_process_policy(&policy, inode);
786encryption_policy_out:
787 return err;
788#else
789 return -EOPNOTSUPP;
790#endif
791 }
792 case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
793 int err, err2;
794 struct ext4_sb_info *sbi = EXT4_SB(sb);
795 handle_t *handle;
796
797 if (!ext4_sb_has_crypto(sb))
798 return -EOPNOTSUPP;
799 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
800 err = mnt_want_write_file(filp);
801 if (err)
802 return err;
803 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
804 if (IS_ERR(handle)) {
805 err = PTR_ERR(handle);
806 goto pwsalt_err_exit;
807 }
808 err = ext4_journal_get_write_access(handle, sbi->s_sbh);
809 if (err)
810 goto pwsalt_err_journal;
811 generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
812 err = ext4_handle_dirty_metadata(handle, NULL,
813 sbi->s_sbh);
814 pwsalt_err_journal:
815 err2 = ext4_journal_stop(handle);
816 if (err2 && !err)
817 err = err2;
818 pwsalt_err_exit:
819 mnt_drop_write_file(filp);
820 if (err)
821 return err;
822 }
823 if (copy_to_user((void __user *) arg,
824 sbi->s_es->s_encrypt_pw_salt, 16))
825 return -EFAULT;
826 return 0;
827 }
828 case EXT4_IOC_GET_ENCRYPTION_POLICY: {
829#ifdef CONFIG_EXT4_FS_ENCRYPTION
830 struct ext4_encryption_policy policy;
831 int err = 0;
832
833 if (!ext4_encrypted_inode(inode))
834 return -ENOENT;
835 err = ext4_get_policy(inode, &policy);
836 if (err)
837 return err;
838 if (copy_to_user((void __user *)arg, &policy, sizeof(policy)))
839 return -EFAULT;
840 return 0;
841#else
842 return -EOPNOTSUPP;
843#endif
844 }
845 case EXT4_IOC_FSGETXATTR:
846 {
847 struct fsxattr fa;
848
849 memset(&fa, 0, sizeof(struct fsxattr));
850 ext4_get_inode_flags(ei);
851 fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE);
852
853 if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
854 EXT4_FEATURE_RO_COMPAT_PROJECT)) {
855 fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
856 EXT4_I(inode)->i_projid);
857 }
858
859 if (copy_to_user((struct fsxattr __user *)arg,
860 &fa, sizeof(fa)))
861 return -EFAULT;
862 return 0;
863 }
864 case EXT4_IOC_FSSETXATTR:
865 {
866 struct fsxattr fa;
867 int err;
868
869 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
870 sizeof(fa)))
871 return -EFAULT;
872
873 /* Make sure caller has proper permission */
874 if (!inode_owner_or_capable(inode))
875 return -EACCES;
876
877 err = mnt_want_write_file(filp);
878 if (err)
879 return err;
880
881 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
882 flags = ext4_mask_flags(inode->i_mode, flags);
883
884 inode_lock(inode);
885 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
886 (flags & EXT4_FL_XFLAG_VISIBLE);
887 err = ext4_ioctl_setflags(inode, flags);
888 inode_unlock(inode);
889 mnt_drop_write_file(filp);
890 if (err)
891 return err;
892
893 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
894 if (err)
895 return err;
896
897 return 0;
898 }
899 default:
900 return -ENOTTY;
901 }
902}
903
904#ifdef CONFIG_COMPAT
905long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
906{
907 /* These are just misnamed, they actually get/put from/to user an int */
908 switch (cmd) {
909 case EXT4_IOC32_GETFLAGS:
910 cmd = EXT4_IOC_GETFLAGS;
911 break;
912 case EXT4_IOC32_SETFLAGS:
913 cmd = EXT4_IOC_SETFLAGS;
914 break;
915 case EXT4_IOC32_GETVERSION:
916 cmd = EXT4_IOC_GETVERSION;
917 break;
918 case EXT4_IOC32_SETVERSION:
919 cmd = EXT4_IOC_SETVERSION;
920 break;
921 case EXT4_IOC32_GROUP_EXTEND:
922 cmd = EXT4_IOC_GROUP_EXTEND;
923 break;
924 case EXT4_IOC32_GETVERSION_OLD:
925 cmd = EXT4_IOC_GETVERSION_OLD;
926 break;
927 case EXT4_IOC32_SETVERSION_OLD:
928 cmd = EXT4_IOC_SETVERSION_OLD;
929 break;
930 case EXT4_IOC32_GETRSVSZ:
931 cmd = EXT4_IOC_GETRSVSZ;
932 break;
933 case EXT4_IOC32_SETRSVSZ:
934 cmd = EXT4_IOC_SETRSVSZ;
935 break;
936 case EXT4_IOC32_GROUP_ADD: {
937 struct compat_ext4_new_group_input __user *uinput;
938 struct ext4_new_group_input input;
939 mm_segment_t old_fs;
940 int err;
941
942 uinput = compat_ptr(arg);
943 err = get_user(input.group, &uinput->group);
944 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
945 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
946 err |= get_user(input.inode_table, &uinput->inode_table);
947 err |= get_user(input.blocks_count, &uinput->blocks_count);
948 err |= get_user(input.reserved_blocks,
949 &uinput->reserved_blocks);
950 if (err)
951 return -EFAULT;
952 old_fs = get_fs();
953 set_fs(KERNEL_DS);
954 err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD,
955 (unsigned long) &input);
956 set_fs(old_fs);
957 return err;
958 }
959 case EXT4_IOC_MOVE_EXT:
960 case EXT4_IOC_RESIZE_FS:
961 case EXT4_IOC_PRECACHE_EXTENTS:
962 case EXT4_IOC_SET_ENCRYPTION_POLICY:
963 case EXT4_IOC_GET_ENCRYPTION_PWSALT:
964 case EXT4_IOC_GET_ENCRYPTION_POLICY:
965 break;
966 default:
967 return -ENOIOCTLCMD;
968 }
969 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
970}
971#endif
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 */
37static 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 */
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;
66
67 ei1 = EXT4_I(inode1);
68 ei2 = EXT4_I(inode2);
69
70 swap(inode1->i_flags, inode2->i_flags);
71 swap(inode1->i_version, inode2->i_version);
72 swap(inode1->i_blocks, inode2->i_blocks);
73 swap(inode1->i_bytes, inode2->i_bytes);
74 swap(inode1->i_atime, inode2->i_atime);
75 swap(inode1->i_mtime, inode2->i_mtime);
76
77 memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
78 swap(ei1->i_flags, ei2->i_flags);
79 swap(ei1->i_disksize, ei2->i_disksize);
80 ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
81 ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
82
83 isize = i_size_read(inode1);
84 i_size_write(inode1, i_size_read(inode2));
85 i_size_write(inode2, isize);
86}
87
88/**
89 * Swap the information from the given @inode and the inode
90 * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
91 * important fields of the inodes.
92 *
93 * @sb: the super block of the filesystem
94 * @inode: the inode to swap with EXT4_BOOT_LOADER_INO
95 *
96 */
97static long swap_inode_boot_loader(struct super_block *sb,
98 struct inode *inode)
99{
100 handle_t *handle;
101 int err;
102 struct inode *inode_bl;
103 struct ext4_inode_info *ei_bl;
104
105 if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode))
106 return -EINVAL;
107
108 if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN))
109 return -EPERM;
110
111 inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO);
112 if (IS_ERR(inode_bl))
113 return PTR_ERR(inode_bl);
114 ei_bl = EXT4_I(inode_bl);
115
116 filemap_flush(inode->i_mapping);
117 filemap_flush(inode_bl->i_mapping);
118
119 /* Protect orig inodes against a truncate and make sure,
120 * that only 1 swap_inode_boot_loader is running. */
121 lock_two_nondirectories(inode, inode_bl);
122
123 truncate_inode_pages(&inode->i_data, 0);
124 truncate_inode_pages(&inode_bl->i_data, 0);
125
126 /* Wait for all existing dio workers */
127 inode_dio_wait(inode);
128 inode_dio_wait(inode_bl);
129
130 handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
131 if (IS_ERR(handle)) {
132 err = -EINVAL;
133 goto journal_err_out;
134 }
135
136 /* Protect extent tree against block allocations via delalloc */
137 ext4_double_down_write_data_sem(inode, inode_bl);
138
139 if (inode_bl->i_nlink == 0) {
140 /* this inode has never been used as a BOOT_LOADER */
141 set_nlink(inode_bl, 1);
142 i_uid_write(inode_bl, 0);
143 i_gid_write(inode_bl, 0);
144 inode_bl->i_flags = 0;
145 ei_bl->i_flags = 0;
146 inode_set_iversion(inode_bl, 1);
147 i_size_write(inode_bl, 0);
148 inode_bl->i_mode = S_IFREG;
149 if (ext4_has_feature_extents(sb)) {
150 ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
151 ext4_ext_tree_init(handle, inode_bl);
152 } else
153 memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
154 }
155
156 swap_inode_data(inode, inode_bl);
157
158 inode->i_ctime = inode_bl->i_ctime = current_time(inode);
159
160 inode->i_generation = prandom_u32();
161 inode_bl->i_generation = prandom_u32();
162
163 ext4_discard_preallocations(inode);
164
165 err = ext4_mark_inode_dirty(handle, inode);
166 if (err < 0) {
167 ext4_warning(inode->i_sb,
168 "couldn't mark inode #%lu dirty (err %d)",
169 inode->i_ino, err);
170 /* Revert all changes: */
171 swap_inode_data(inode, inode_bl);
172 } else {
173 err = ext4_mark_inode_dirty(handle, inode_bl);
174 if (err < 0) {
175 ext4_warning(inode_bl->i_sb,
176 "couldn't mark inode #%lu dirty (err %d)",
177 inode_bl->i_ino, err);
178 /* Revert all changes: */
179 swap_inode_data(inode, inode_bl);
180 ext4_mark_inode_dirty(handle, inode);
181 }
182 }
183 ext4_journal_stop(handle);
184 ext4_double_up_write_data_sem(inode, inode_bl);
185
186journal_err_out:
187 unlock_two_nondirectories(inode, inode_bl);
188 iput(inode_bl);
189 return err;
190}
191
192#ifdef CONFIG_EXT4_FS_ENCRYPTION
193static int uuid_is_zero(__u8 u[16])
194{
195 int i;
196
197 for (i = 0; i < 16; i++)
198 if (u[i])
199 return 0;
200 return 1;
201}
202#endif
203
204static int ext4_ioctl_setflags(struct inode *inode,
205 unsigned int flags)
206{
207 struct ext4_inode_info *ei = EXT4_I(inode);
208 handle_t *handle = NULL;
209 int err = -EPERM, migrate = 0;
210 struct ext4_iloc iloc;
211 unsigned int oldflags, mask, i;
212 unsigned int jflag;
213
214 /* Is it quota file? Do not allow user to mess with it */
215 if (ext4_is_quota_file(inode))
216 goto flags_out;
217
218 oldflags = ei->i_flags;
219
220 /* The JOURNAL_DATA flag is modifiable only by root */
221 jflag = flags & EXT4_JOURNAL_DATA_FL;
222
223 /*
224 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
225 * the relevant capability.
226 *
227 * This test looks nicer. Thanks to Pauline Middelink
228 */
229 if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
230 if (!capable(CAP_LINUX_IMMUTABLE))
231 goto flags_out;
232 }
233
234 /*
235 * The JOURNAL_DATA flag can only be changed by
236 * the relevant capability.
237 */
238 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
239 if (!capable(CAP_SYS_RESOURCE))
240 goto flags_out;
241 }
242 if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
243 migrate = 1;
244
245 if (flags & EXT4_EOFBLOCKS_FL) {
246 /* we don't support adding EOFBLOCKS flag */
247 if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
248 err = -EOPNOTSUPP;
249 goto flags_out;
250 }
251 } else if (oldflags & EXT4_EOFBLOCKS_FL) {
252 err = ext4_truncate(inode);
253 if (err)
254 goto flags_out;
255 }
256
257 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
258 if (IS_ERR(handle)) {
259 err = PTR_ERR(handle);
260 goto flags_out;
261 }
262 if (IS_SYNC(inode))
263 ext4_handle_sync(handle);
264 err = ext4_reserve_inode_write(handle, inode, &iloc);
265 if (err)
266 goto flags_err;
267
268 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
269 if (!(mask & EXT4_FL_USER_MODIFIABLE))
270 continue;
271 /* These flags get special treatment later */
272 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
273 continue;
274 if (mask & flags)
275 ext4_set_inode_flag(inode, i);
276 else
277 ext4_clear_inode_flag(inode, i);
278 }
279
280 ext4_set_inode_flags(inode);
281 inode->i_ctime = current_time(inode);
282
283 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
284flags_err:
285 ext4_journal_stop(handle);
286 if (err)
287 goto flags_out;
288
289 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
290 /*
291 * Changes to the journaling mode can cause unsafe changes to
292 * S_DAX if we are using the DAX mount option.
293 */
294 if (test_opt(inode->i_sb, DAX)) {
295 err = -EBUSY;
296 goto flags_out;
297 }
298
299 err = ext4_change_inode_journal_flag(inode, jflag);
300 if (err)
301 goto flags_out;
302 }
303 if (migrate) {
304 if (flags & EXT4_EXTENTS_FL)
305 err = ext4_ext_migrate(inode);
306 else
307 err = ext4_ind_migrate(inode);
308 }
309
310flags_out:
311 return err;
312}
313
314#ifdef CONFIG_QUOTA
315static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
316{
317 struct inode *inode = file_inode(filp);
318 struct super_block *sb = inode->i_sb;
319 struct ext4_inode_info *ei = EXT4_I(inode);
320 int err, rc;
321 handle_t *handle;
322 kprojid_t kprojid;
323 struct ext4_iloc iloc;
324 struct ext4_inode *raw_inode;
325 struct dquot *transfer_to[MAXQUOTAS] = { };
326
327 if (!ext4_has_feature_project(sb)) {
328 if (projid != EXT4_DEF_PROJID)
329 return -EOPNOTSUPP;
330 else
331 return 0;
332 }
333
334 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
335 return -EOPNOTSUPP;
336
337 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
338
339 if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
340 return 0;
341
342 err = mnt_want_write_file(filp);
343 if (err)
344 return err;
345
346 err = -EPERM;
347 inode_lock(inode);
348 /* Is it quota file? Do not allow user to mess with it */
349 if (ext4_is_quota_file(inode))
350 goto out_unlock;
351
352 err = ext4_get_inode_loc(inode, &iloc);
353 if (err)
354 goto out_unlock;
355
356 raw_inode = ext4_raw_inode(&iloc);
357 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
358 err = ext4_expand_extra_isize(inode,
359 EXT4_SB(sb)->s_want_extra_isize,
360 &iloc);
361 if (err)
362 goto out_unlock;
363 } else {
364 brelse(iloc.bh);
365 }
366
367 dquot_initialize(inode);
368
369 handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
370 EXT4_QUOTA_INIT_BLOCKS(sb) +
371 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
372 if (IS_ERR(handle)) {
373 err = PTR_ERR(handle);
374 goto out_unlock;
375 }
376
377 err = ext4_reserve_inode_write(handle, inode, &iloc);
378 if (err)
379 goto out_stop;
380
381 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
382 if (!IS_ERR(transfer_to[PRJQUOTA])) {
383
384 /* __dquot_transfer() calls back ext4_get_inode_usage() which
385 * counts xattr inode references.
386 */
387 down_read(&EXT4_I(inode)->xattr_sem);
388 err = __dquot_transfer(inode, transfer_to);
389 up_read(&EXT4_I(inode)->xattr_sem);
390 dqput(transfer_to[PRJQUOTA]);
391 if (err)
392 goto out_dirty;
393 }
394
395 EXT4_I(inode)->i_projid = kprojid;
396 inode->i_ctime = current_time(inode);
397out_dirty:
398 rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
399 if (!err)
400 err = rc;
401out_stop:
402 ext4_journal_stop(handle);
403out_unlock:
404 inode_unlock(inode);
405 mnt_drop_write_file(filp);
406 return err;
407}
408#else
409static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
410{
411 if (projid != EXT4_DEF_PROJID)
412 return -EOPNOTSUPP;
413 return 0;
414}
415#endif
416
417/* Transfer internal flags to xflags */
418static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
419{
420 __u32 xflags = 0;
421
422 if (iflags & EXT4_SYNC_FL)
423 xflags |= FS_XFLAG_SYNC;
424 if (iflags & EXT4_IMMUTABLE_FL)
425 xflags |= FS_XFLAG_IMMUTABLE;
426 if (iflags & EXT4_APPEND_FL)
427 xflags |= FS_XFLAG_APPEND;
428 if (iflags & EXT4_NODUMP_FL)
429 xflags |= FS_XFLAG_NODUMP;
430 if (iflags & EXT4_NOATIME_FL)
431 xflags |= FS_XFLAG_NOATIME;
432 if (iflags & EXT4_PROJINHERIT_FL)
433 xflags |= FS_XFLAG_PROJINHERIT;
434 return xflags;
435}
436
437#define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
438 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
439 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
440
441/* Transfer xflags flags to internal */
442static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
443{
444 unsigned long iflags = 0;
445
446 if (xflags & FS_XFLAG_SYNC)
447 iflags |= EXT4_SYNC_FL;
448 if (xflags & FS_XFLAG_IMMUTABLE)
449 iflags |= EXT4_IMMUTABLE_FL;
450 if (xflags & FS_XFLAG_APPEND)
451 iflags |= EXT4_APPEND_FL;
452 if (xflags & FS_XFLAG_NODUMP)
453 iflags |= EXT4_NODUMP_FL;
454 if (xflags & FS_XFLAG_NOATIME)
455 iflags |= EXT4_NOATIME_FL;
456 if (xflags & FS_XFLAG_PROJINHERIT)
457 iflags |= EXT4_PROJINHERIT_FL;
458
459 return iflags;
460}
461
462static int ext4_shutdown(struct super_block *sb, unsigned long arg)
463{
464 struct ext4_sb_info *sbi = EXT4_SB(sb);
465 __u32 flags;
466
467 if (!capable(CAP_SYS_ADMIN))
468 return -EPERM;
469
470 if (get_user(flags, (__u32 __user *)arg))
471 return -EFAULT;
472
473 if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
474 return -EINVAL;
475
476 if (ext4_forced_shutdown(sbi))
477 return 0;
478
479 ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
480 trace_ext4_shutdown(sb, flags);
481
482 switch (flags) {
483 case EXT4_GOING_FLAGS_DEFAULT:
484 freeze_bdev(sb->s_bdev);
485 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
486 thaw_bdev(sb->s_bdev, sb);
487 break;
488 case EXT4_GOING_FLAGS_LOGFLUSH:
489 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
490 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
491 (void) ext4_force_commit(sb);
492 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
493 }
494 break;
495 case EXT4_GOING_FLAGS_NOLOGFLUSH:
496 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
497 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
498 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
499 break;
500 default:
501 return -EINVAL;
502 }
503 clear_opt(sb, DISCARD);
504 return 0;
505}
506
507struct getfsmap_info {
508 struct super_block *gi_sb;
509 struct fsmap_head __user *gi_data;
510 unsigned int gi_idx;
511 __u32 gi_last_flags;
512};
513
514static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
515{
516 struct getfsmap_info *info = priv;
517 struct fsmap fm;
518
519 trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
520
521 info->gi_last_flags = xfm->fmr_flags;
522 ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
523 if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
524 sizeof(struct fsmap)))
525 return -EFAULT;
526
527 return 0;
528}
529
530static int ext4_ioc_getfsmap(struct super_block *sb,
531 struct fsmap_head __user *arg)
532{
533 struct getfsmap_info info = {0};
534 struct ext4_fsmap_head xhead = {0};
535 struct fsmap_head head;
536 bool aborted = false;
537 int error;
538
539 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
540 return -EFAULT;
541 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
542 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
543 sizeof(head.fmh_keys[0].fmr_reserved)) ||
544 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
545 sizeof(head.fmh_keys[1].fmr_reserved)))
546 return -EINVAL;
547 /*
548 * ext4 doesn't report file extents at all, so the only valid
549 * file offsets are the magic ones (all zeroes or all ones).
550 */
551 if (head.fmh_keys[0].fmr_offset ||
552 (head.fmh_keys[1].fmr_offset != 0 &&
553 head.fmh_keys[1].fmr_offset != -1ULL))
554 return -EINVAL;
555
556 xhead.fmh_iflags = head.fmh_iflags;
557 xhead.fmh_count = head.fmh_count;
558 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
559 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
560
561 trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
562 trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
563
564 info.gi_sb = sb;
565 info.gi_data = arg;
566 error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
567 if (error == EXT4_QUERY_RANGE_ABORT) {
568 error = 0;
569 aborted = true;
570 } else if (error)
571 return error;
572
573 /* If we didn't abort, set the "last" flag in the last fmx */
574 if (!aborted && info.gi_idx) {
575 info.gi_last_flags |= FMR_OF_LAST;
576 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
577 &info.gi_last_flags,
578 sizeof(info.gi_last_flags)))
579 return -EFAULT;
580 }
581
582 /* copy back header */
583 head.fmh_entries = xhead.fmh_entries;
584 head.fmh_oflags = xhead.fmh_oflags;
585 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
586 return -EFAULT;
587
588 return 0;
589}
590
591static long ext4_ioctl_group_add(struct file *file,
592 struct ext4_new_group_data *input)
593{
594 struct super_block *sb = file_inode(file)->i_sb;
595 int err, err2=0;
596
597 err = ext4_resize_begin(sb);
598 if (err)
599 return err;
600
601 if (ext4_has_feature_bigalloc(sb)) {
602 ext4_msg(sb, KERN_ERR,
603 "Online resizing not supported with bigalloc");
604 err = -EOPNOTSUPP;
605 goto group_add_out;
606 }
607
608 err = mnt_want_write_file(file);
609 if (err)
610 goto group_add_out;
611
612 err = ext4_group_add(sb, input);
613 if (EXT4_SB(sb)->s_journal) {
614 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
615 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
616 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
617 }
618 if (err == 0)
619 err = err2;
620 mnt_drop_write_file(file);
621 if (!err && ext4_has_group_desc_csum(sb) &&
622 test_opt(sb, INIT_INODE_TABLE))
623 err = ext4_register_li_request(sb, input->group);
624group_add_out:
625 ext4_resize_end(sb);
626 return err;
627}
628
629long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
630{
631 struct inode *inode = file_inode(filp);
632 struct super_block *sb = inode->i_sb;
633 struct ext4_inode_info *ei = EXT4_I(inode);
634 unsigned int flags;
635
636 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
637
638 switch (cmd) {
639 case FS_IOC_GETFSMAP:
640 return ext4_ioc_getfsmap(sb, (void __user *)arg);
641 case EXT4_IOC_GETFLAGS:
642 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
643 return put_user(flags, (int __user *) arg);
644 case EXT4_IOC_SETFLAGS: {
645 int err;
646
647 if (!inode_owner_or_capable(inode))
648 return -EACCES;
649
650 if (get_user(flags, (int __user *) arg))
651 return -EFAULT;
652
653 if (flags & ~EXT4_FL_USER_VISIBLE)
654 return -EOPNOTSUPP;
655 /*
656 * chattr(1) grabs flags via GETFLAGS, modifies the result and
657 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
658 * more restrictive than just silently masking off visible but
659 * not settable flags as we always did.
660 */
661 flags &= EXT4_FL_USER_MODIFIABLE;
662 if (ext4_mask_flags(inode->i_mode, flags) != flags)
663 return -EOPNOTSUPP;
664
665 err = mnt_want_write_file(filp);
666 if (err)
667 return err;
668
669 inode_lock(inode);
670 err = ext4_ioctl_setflags(inode, flags);
671 inode_unlock(inode);
672 mnt_drop_write_file(filp);
673 return err;
674 }
675 case EXT4_IOC_GETVERSION:
676 case EXT4_IOC_GETVERSION_OLD:
677 return put_user(inode->i_generation, (int __user *) arg);
678 case EXT4_IOC_SETVERSION:
679 case EXT4_IOC_SETVERSION_OLD: {
680 handle_t *handle;
681 struct ext4_iloc iloc;
682 __u32 generation;
683 int err;
684
685 if (!inode_owner_or_capable(inode))
686 return -EPERM;
687
688 if (ext4_has_metadata_csum(inode->i_sb)) {
689 ext4_warning(sb, "Setting inode version is not "
690 "supported with metadata_csum enabled.");
691 return -ENOTTY;
692 }
693
694 err = mnt_want_write_file(filp);
695 if (err)
696 return err;
697 if (get_user(generation, (int __user *) arg)) {
698 err = -EFAULT;
699 goto setversion_out;
700 }
701
702 inode_lock(inode);
703 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
704 if (IS_ERR(handle)) {
705 err = PTR_ERR(handle);
706 goto unlock_out;
707 }
708 err = ext4_reserve_inode_write(handle, inode, &iloc);
709 if (err == 0) {
710 inode->i_ctime = current_time(inode);
711 inode->i_generation = generation;
712 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
713 }
714 ext4_journal_stop(handle);
715
716unlock_out:
717 inode_unlock(inode);
718setversion_out:
719 mnt_drop_write_file(filp);
720 return err;
721 }
722 case EXT4_IOC_GROUP_EXTEND: {
723 ext4_fsblk_t n_blocks_count;
724 int err, err2=0;
725
726 err = ext4_resize_begin(sb);
727 if (err)
728 return err;
729
730 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
731 err = -EFAULT;
732 goto group_extend_out;
733 }
734
735 if (ext4_has_feature_bigalloc(sb)) {
736 ext4_msg(sb, KERN_ERR,
737 "Online resizing not supported with bigalloc");
738 err = -EOPNOTSUPP;
739 goto group_extend_out;
740 }
741
742 err = mnt_want_write_file(filp);
743 if (err)
744 goto group_extend_out;
745
746 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
747 if (EXT4_SB(sb)->s_journal) {
748 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
749 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
750 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
751 }
752 if (err == 0)
753 err = err2;
754 mnt_drop_write_file(filp);
755group_extend_out:
756 ext4_resize_end(sb);
757 return err;
758 }
759
760 case EXT4_IOC_MOVE_EXT: {
761 struct move_extent me;
762 struct fd donor;
763 int err;
764
765 if (!(filp->f_mode & FMODE_READ) ||
766 !(filp->f_mode & FMODE_WRITE))
767 return -EBADF;
768
769 if (copy_from_user(&me,
770 (struct move_extent __user *)arg, sizeof(me)))
771 return -EFAULT;
772 me.moved_len = 0;
773
774 donor = fdget(me.donor_fd);
775 if (!donor.file)
776 return -EBADF;
777
778 if (!(donor.file->f_mode & FMODE_WRITE)) {
779 err = -EBADF;
780 goto mext_out;
781 }
782
783 if (ext4_has_feature_bigalloc(sb)) {
784 ext4_msg(sb, KERN_ERR,
785 "Online defrag not supported with bigalloc");
786 err = -EOPNOTSUPP;
787 goto mext_out;
788 } else if (IS_DAX(inode)) {
789 ext4_msg(sb, KERN_ERR,
790 "Online defrag not supported with DAX");
791 err = -EOPNOTSUPP;
792 goto mext_out;
793 }
794
795 err = mnt_want_write_file(filp);
796 if (err)
797 goto mext_out;
798
799 err = ext4_move_extents(filp, donor.file, me.orig_start,
800 me.donor_start, me.len, &me.moved_len);
801 mnt_drop_write_file(filp);
802
803 if (copy_to_user((struct move_extent __user *)arg,
804 &me, sizeof(me)))
805 err = -EFAULT;
806mext_out:
807 fdput(donor);
808 return err;
809 }
810
811 case EXT4_IOC_GROUP_ADD: {
812 struct ext4_new_group_data input;
813
814 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
815 sizeof(input)))
816 return -EFAULT;
817
818 return ext4_ioctl_group_add(filp, &input);
819 }
820
821 case EXT4_IOC_MIGRATE:
822 {
823 int err;
824 if (!inode_owner_or_capable(inode))
825 return -EACCES;
826
827 err = mnt_want_write_file(filp);
828 if (err)
829 return err;
830 /*
831 * inode_mutex prevent write and truncate on the file.
832 * Read still goes through. We take i_data_sem in
833 * ext4_ext_swap_inode_data before we switch the
834 * inode format to prevent read.
835 */
836 inode_lock((inode));
837 err = ext4_ext_migrate(inode);
838 inode_unlock((inode));
839 mnt_drop_write_file(filp);
840 return err;
841 }
842
843 case EXT4_IOC_ALLOC_DA_BLKS:
844 {
845 int err;
846 if (!inode_owner_or_capable(inode))
847 return -EACCES;
848
849 err = mnt_want_write_file(filp);
850 if (err)
851 return err;
852 err = ext4_alloc_da_blocks(inode);
853 mnt_drop_write_file(filp);
854 return err;
855 }
856
857 case EXT4_IOC_SWAP_BOOT:
858 {
859 int err;
860 if (!(filp->f_mode & FMODE_WRITE))
861 return -EBADF;
862 err = mnt_want_write_file(filp);
863 if (err)
864 return err;
865 err = swap_inode_boot_loader(sb, inode);
866 mnt_drop_write_file(filp);
867 return err;
868 }
869
870 case EXT4_IOC_RESIZE_FS: {
871 ext4_fsblk_t n_blocks_count;
872 int err = 0, err2 = 0;
873 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
874
875 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
876 sizeof(__u64))) {
877 return -EFAULT;
878 }
879
880 err = ext4_resize_begin(sb);
881 if (err)
882 return err;
883
884 err = mnt_want_write_file(filp);
885 if (err)
886 goto resizefs_out;
887
888 err = ext4_resize_fs(sb, n_blocks_count);
889 if (EXT4_SB(sb)->s_journal) {
890 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
891 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
892 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
893 }
894 if (err == 0)
895 err = err2;
896 mnt_drop_write_file(filp);
897 if (!err && (o_group > EXT4_SB(sb)->s_groups_count) &&
898 ext4_has_group_desc_csum(sb) &&
899 test_opt(sb, INIT_INODE_TABLE))
900 err = ext4_register_li_request(sb, o_group);
901
902resizefs_out:
903 ext4_resize_end(sb);
904 return err;
905 }
906
907 case FITRIM:
908 {
909 struct request_queue *q = bdev_get_queue(sb->s_bdev);
910 struct fstrim_range range;
911 int ret = 0;
912
913 if (!capable(CAP_SYS_ADMIN))
914 return -EPERM;
915
916 if (!blk_queue_discard(q))
917 return -EOPNOTSUPP;
918
919 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
920 sizeof(range)))
921 return -EFAULT;
922
923 range.minlen = max((unsigned int)range.minlen,
924 q->limits.discard_granularity);
925 ret = ext4_trim_fs(sb, &range);
926 if (ret < 0)
927 return ret;
928
929 if (copy_to_user((struct fstrim_range __user *)arg, &range,
930 sizeof(range)))
931 return -EFAULT;
932
933 return 0;
934 }
935 case EXT4_IOC_PRECACHE_EXTENTS:
936 return ext4_ext_precache(inode);
937
938 case EXT4_IOC_SET_ENCRYPTION_POLICY:
939 if (!ext4_has_feature_encrypt(sb))
940 return -EOPNOTSUPP;
941 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
942
943 case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
944#ifdef CONFIG_EXT4_FS_ENCRYPTION
945 int err, err2;
946 struct ext4_sb_info *sbi = EXT4_SB(sb);
947 handle_t *handle;
948
949 if (!ext4_has_feature_encrypt(sb))
950 return -EOPNOTSUPP;
951 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
952 err = mnt_want_write_file(filp);
953 if (err)
954 return err;
955 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
956 if (IS_ERR(handle)) {
957 err = PTR_ERR(handle);
958 goto pwsalt_err_exit;
959 }
960 err = ext4_journal_get_write_access(handle, sbi->s_sbh);
961 if (err)
962 goto pwsalt_err_journal;
963 generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
964 err = ext4_handle_dirty_metadata(handle, NULL,
965 sbi->s_sbh);
966 pwsalt_err_journal:
967 err2 = ext4_journal_stop(handle);
968 if (err2 && !err)
969 err = err2;
970 pwsalt_err_exit:
971 mnt_drop_write_file(filp);
972 if (err)
973 return err;
974 }
975 if (copy_to_user((void __user *) arg,
976 sbi->s_es->s_encrypt_pw_salt, 16))
977 return -EFAULT;
978 return 0;
979#else
980 return -EOPNOTSUPP;
981#endif
982 }
983 case EXT4_IOC_GET_ENCRYPTION_POLICY:
984 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
985
986 case EXT4_IOC_FSGETXATTR:
987 {
988 struct fsxattr fa;
989
990 memset(&fa, 0, sizeof(struct fsxattr));
991 fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE);
992
993 if (ext4_has_feature_project(inode->i_sb)) {
994 fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
995 EXT4_I(inode)->i_projid);
996 }
997
998 if (copy_to_user((struct fsxattr __user *)arg,
999 &fa, sizeof(fa)))
1000 return -EFAULT;
1001 return 0;
1002 }
1003 case EXT4_IOC_FSSETXATTR:
1004 {
1005 struct fsxattr fa;
1006 int err;
1007
1008 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
1009 sizeof(fa)))
1010 return -EFAULT;
1011
1012 /* Make sure caller has proper permission */
1013 if (!inode_owner_or_capable(inode))
1014 return -EACCES;
1015
1016 if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
1017 return -EOPNOTSUPP;
1018
1019 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
1020 if (ext4_mask_flags(inode->i_mode, flags) != flags)
1021 return -EOPNOTSUPP;
1022
1023 err = mnt_want_write_file(filp);
1024 if (err)
1025 return err;
1026
1027 inode_lock(inode);
1028 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
1029 (flags & EXT4_FL_XFLAG_VISIBLE);
1030 err = ext4_ioctl_setflags(inode, flags);
1031 inode_unlock(inode);
1032 mnt_drop_write_file(filp);
1033 if (err)
1034 return err;
1035
1036 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
1037 if (err)
1038 return err;
1039
1040 return 0;
1041 }
1042 case EXT4_IOC_SHUTDOWN:
1043 return ext4_shutdown(sb, arg);
1044 default:
1045 return -ENOTTY;
1046 }
1047}
1048
1049#ifdef CONFIG_COMPAT
1050long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1051{
1052 /* These are just misnamed, they actually get/put from/to user an int */
1053 switch (cmd) {
1054 case EXT4_IOC32_GETFLAGS:
1055 cmd = EXT4_IOC_GETFLAGS;
1056 break;
1057 case EXT4_IOC32_SETFLAGS:
1058 cmd = EXT4_IOC_SETFLAGS;
1059 break;
1060 case EXT4_IOC32_GETVERSION:
1061 cmd = EXT4_IOC_GETVERSION;
1062 break;
1063 case EXT4_IOC32_SETVERSION:
1064 cmd = EXT4_IOC_SETVERSION;
1065 break;
1066 case EXT4_IOC32_GROUP_EXTEND:
1067 cmd = EXT4_IOC_GROUP_EXTEND;
1068 break;
1069 case EXT4_IOC32_GETVERSION_OLD:
1070 cmd = EXT4_IOC_GETVERSION_OLD;
1071 break;
1072 case EXT4_IOC32_SETVERSION_OLD:
1073 cmd = EXT4_IOC_SETVERSION_OLD;
1074 break;
1075 case EXT4_IOC32_GETRSVSZ:
1076 cmd = EXT4_IOC_GETRSVSZ;
1077 break;
1078 case EXT4_IOC32_SETRSVSZ:
1079 cmd = EXT4_IOC_SETRSVSZ;
1080 break;
1081 case EXT4_IOC32_GROUP_ADD: {
1082 struct compat_ext4_new_group_input __user *uinput;
1083 struct ext4_new_group_data input;
1084 int err;
1085
1086 uinput = compat_ptr(arg);
1087 err = get_user(input.group, &uinput->group);
1088 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1089 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1090 err |= get_user(input.inode_table, &uinput->inode_table);
1091 err |= get_user(input.blocks_count, &uinput->blocks_count);
1092 err |= get_user(input.reserved_blocks,
1093 &uinput->reserved_blocks);
1094 if (err)
1095 return -EFAULT;
1096 return ext4_ioctl_group_add(file, &input);
1097 }
1098 case EXT4_IOC_MOVE_EXT:
1099 case EXT4_IOC_RESIZE_FS:
1100 case EXT4_IOC_PRECACHE_EXTENTS:
1101 case EXT4_IOC_SET_ENCRYPTION_POLICY:
1102 case EXT4_IOC_GET_ENCRYPTION_PWSALT:
1103 case EXT4_IOC_GET_ENCRYPTION_POLICY:
1104 case EXT4_IOC_SHUTDOWN:
1105 case FS_IOC_GETFSMAP:
1106 break;
1107 default:
1108 return -ENOIOCTLCMD;
1109 }
1110 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1111}
1112#endif