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 <linux/fileattr.h>
24 #include "ext4_jbd2.h"
25 #include "ext4.h"
26 #include <linux/fsmap.h>
27 #include "fsmap.h"
28 #include <trace/events/ext4.h>
29
30 /**
31 * Swap memory between @a and @b for @len bytes.
32 *
33 * @a: pointer to first memory area
34 * @b: pointer to second memory area
35 * @len: number of bytes to swap
36 *
37 */
memswap(void * a,void * b,size_t len)38 static void memswap(void *a, void *b, size_t len)
39 {
40 unsigned char *ap, *bp;
41
42 ap = (unsigned char *)a;
43 bp = (unsigned char *)b;
44 while (len-- > 0) {
45 swap(*ap, *bp);
46 ap++;
47 bp++;
48 }
49 }
50
51 /**
52 * Swap i_data and associated attributes between @inode1 and @inode2.
53 * This function is used for the primary swap between inode1 and inode2
54 * and also to revert this primary swap in case of errors.
55 *
56 * Therefore you have to make sure, that calling this method twice
57 * will revert all changes.
58 *
59 * @inode1: pointer to first inode
60 * @inode2: pointer to second inode
61 */
swap_inode_data(struct inode * inode1,struct inode * inode2)62 static void swap_inode_data(struct inode *inode1, struct inode *inode2)
63 {
64 loff_t isize;
65 struct ext4_inode_info *ei1;
66 struct ext4_inode_info *ei2;
67 unsigned long tmp;
68
69 ei1 = EXT4_I(inode1);
70 ei2 = EXT4_I(inode2);
71
72 swap(inode1->i_version, inode2->i_version);
73 swap(inode1->i_atime, inode2->i_atime);
74 swap(inode1->i_mtime, inode2->i_mtime);
75
76 memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
77 tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP;
78 ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) |
79 (ei1->i_flags & ~EXT4_FL_SHOULD_SWAP);
80 ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP);
81 swap(ei1->i_disksize, ei2->i_disksize);
82 ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
83 ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
84
85 isize = i_size_read(inode1);
86 i_size_write(inode1, i_size_read(inode2));
87 i_size_write(inode2, isize);
88 }
89
ext4_reset_inode_seed(struct inode * inode)90 void ext4_reset_inode_seed(struct inode *inode)
91 {
92 struct ext4_inode_info *ei = EXT4_I(inode);
93 struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
94 __le32 inum = cpu_to_le32(inode->i_ino);
95 __le32 gen = cpu_to_le32(inode->i_generation);
96 __u32 csum;
97
98 if (!ext4_has_metadata_csum(inode->i_sb))
99 return;
100
101 csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum));
102 ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen));
103 }
104
105 /**
106 * Swap the information from the given @inode and the inode
107 * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
108 * important fields of the inodes.
109 *
110 * @sb: the super block of the filesystem
111 * @mnt_userns: user namespace of the mount the inode was found from
112 * @inode: the inode to swap with EXT4_BOOT_LOADER_INO
113 *
114 */
swap_inode_boot_loader(struct super_block * sb,struct user_namespace * mnt_userns,struct inode * inode)115 static long swap_inode_boot_loader(struct super_block *sb,
116 struct user_namespace *mnt_userns,
117 struct inode *inode)
118 {
119 handle_t *handle;
120 int err;
121 struct inode *inode_bl;
122 struct ext4_inode_info *ei_bl;
123 qsize_t size, size_bl, diff;
124 blkcnt_t blocks;
125 unsigned short bytes;
126
127 inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO, EXT4_IGET_SPECIAL);
128 if (IS_ERR(inode_bl))
129 return PTR_ERR(inode_bl);
130 ei_bl = EXT4_I(inode_bl);
131
132 /* Protect orig inodes against a truncate and make sure,
133 * that only 1 swap_inode_boot_loader is running. */
134 lock_two_nondirectories(inode, inode_bl);
135
136 if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
137 IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
138 (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
139 ext4_has_inline_data(inode)) {
140 err = -EINVAL;
141 goto journal_err_out;
142 }
143
144 if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
145 !inode_owner_or_capable(mnt_userns, inode) ||
146 !capable(CAP_SYS_ADMIN)) {
147 err = -EPERM;
148 goto journal_err_out;
149 }
150
151 filemap_invalidate_lock(inode->i_mapping);
152 err = filemap_write_and_wait(inode->i_mapping);
153 if (err)
154 goto err_out;
155
156 err = filemap_write_and_wait(inode_bl->i_mapping);
157 if (err)
158 goto err_out;
159
160 /* Wait for all existing dio workers */
161 inode_dio_wait(inode);
162 inode_dio_wait(inode_bl);
163
164 truncate_inode_pages(&inode->i_data, 0);
165 truncate_inode_pages(&inode_bl->i_data, 0);
166
167 handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
168 if (IS_ERR(handle)) {
169 err = -EINVAL;
170 goto err_out;
171 }
172 ext4_fc_start_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT);
173
174 /* Protect extent tree against block allocations via delalloc */
175 ext4_double_down_write_data_sem(inode, inode_bl);
176
177 if (inode_bl->i_nlink == 0) {
178 /* this inode has never been used as a BOOT_LOADER */
179 set_nlink(inode_bl, 1);
180 i_uid_write(inode_bl, 0);
181 i_gid_write(inode_bl, 0);
182 inode_bl->i_flags = 0;
183 ei_bl->i_flags = 0;
184 inode_set_iversion(inode_bl, 1);
185 i_size_write(inode_bl, 0);
186 inode_bl->i_mode = S_IFREG;
187 if (ext4_has_feature_extents(sb)) {
188 ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
189 ext4_ext_tree_init(handle, inode_bl);
190 } else
191 memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
192 }
193
194 err = dquot_initialize(inode);
195 if (err)
196 goto err_out1;
197
198 size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
199 size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
200 diff = size - size_bl;
201 swap_inode_data(inode, inode_bl);
202
203 inode->i_ctime = inode_bl->i_ctime = current_time(inode);
204
205 inode->i_generation = prandom_u32();
206 inode_bl->i_generation = prandom_u32();
207 ext4_reset_inode_seed(inode);
208 ext4_reset_inode_seed(inode_bl);
209
210 ext4_discard_preallocations(inode, 0);
211
212 err = ext4_mark_inode_dirty(handle, inode);
213 if (err < 0) {
214 /* No need to update quota information. */
215 ext4_warning(inode->i_sb,
216 "couldn't mark inode #%lu dirty (err %d)",
217 inode->i_ino, err);
218 /* Revert all changes: */
219 swap_inode_data(inode, inode_bl);
220 ext4_mark_inode_dirty(handle, inode);
221 goto err_out1;
222 }
223
224 blocks = inode_bl->i_blocks;
225 bytes = inode_bl->i_bytes;
226 inode_bl->i_blocks = inode->i_blocks;
227 inode_bl->i_bytes = inode->i_bytes;
228 err = ext4_mark_inode_dirty(handle, inode_bl);
229 if (err < 0) {
230 /* No need to update quota information. */
231 ext4_warning(inode_bl->i_sb,
232 "couldn't mark inode #%lu dirty (err %d)",
233 inode_bl->i_ino, err);
234 goto revert;
235 }
236
237 /* Bootloader inode should not be counted into quota information. */
238 if (diff > 0)
239 dquot_free_space(inode, diff);
240 else
241 err = dquot_alloc_space(inode, -1 * diff);
242
243 if (err < 0) {
244 revert:
245 /* Revert all changes: */
246 inode_bl->i_blocks = blocks;
247 inode_bl->i_bytes = bytes;
248 swap_inode_data(inode, inode_bl);
249 ext4_mark_inode_dirty(handle, inode);
250 ext4_mark_inode_dirty(handle, inode_bl);
251 }
252
253 err_out1:
254 ext4_journal_stop(handle);
255 ext4_fc_stop_ineligible(sb);
256 ext4_double_up_write_data_sem(inode, inode_bl);
257
258 err_out:
259 filemap_invalidate_unlock(inode->i_mapping);
260 journal_err_out:
261 unlock_two_nondirectories(inode, inode_bl);
262 iput(inode_bl);
263 return err;
264 }
265
266 #ifdef CONFIG_FS_ENCRYPTION
uuid_is_zero(__u8 u[16])267 static int uuid_is_zero(__u8 u[16])
268 {
269 int i;
270
271 for (i = 0; i < 16; i++)
272 if (u[i])
273 return 0;
274 return 1;
275 }
276 #endif
277
278 /*
279 * If immutable is set and we are not clearing it, we're not allowed to change
280 * anything else in the inode. Don't error out if we're only trying to set
281 * immutable on an immutable file.
282 */
ext4_ioctl_check_immutable(struct inode * inode,__u32 new_projid,unsigned int flags)283 static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
284 unsigned int flags)
285 {
286 struct ext4_inode_info *ei = EXT4_I(inode);
287 unsigned int oldflags = ei->i_flags;
288
289 if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
290 return 0;
291
292 if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
293 return -EPERM;
294 if (ext4_has_feature_project(inode->i_sb) &&
295 __kprojid_val(ei->i_projid) != new_projid)
296 return -EPERM;
297
298 return 0;
299 }
300
ext4_dax_dontcache(struct inode * inode,unsigned int flags)301 static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
302 {
303 struct ext4_inode_info *ei = EXT4_I(inode);
304
305 if (S_ISDIR(inode->i_mode))
306 return;
307
308 if (test_opt2(inode->i_sb, DAX_NEVER) ||
309 test_opt(inode->i_sb, DAX_ALWAYS))
310 return;
311
312 if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
313 d_mark_dontcache(inode);
314 }
315
dax_compatible(struct inode * inode,unsigned int oldflags,unsigned int flags)316 static bool dax_compatible(struct inode *inode, unsigned int oldflags,
317 unsigned int flags)
318 {
319 /* Allow the DAX flag to be changed on inline directories */
320 if (S_ISDIR(inode->i_mode)) {
321 flags &= ~EXT4_INLINE_DATA_FL;
322 oldflags &= ~EXT4_INLINE_DATA_FL;
323 }
324
325 if (flags & EXT4_DAX_FL) {
326 if ((oldflags & EXT4_DAX_MUT_EXCL) ||
327 ext4_test_inode_state(inode,
328 EXT4_STATE_VERITY_IN_PROGRESS)) {
329 return false;
330 }
331 }
332
333 if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
334 return false;
335
336 return true;
337 }
338
ext4_ioctl_setflags(struct inode * inode,unsigned int flags)339 static int ext4_ioctl_setflags(struct inode *inode,
340 unsigned int flags)
341 {
342 struct ext4_inode_info *ei = EXT4_I(inode);
343 handle_t *handle = NULL;
344 int err = -EPERM, migrate = 0;
345 struct ext4_iloc iloc;
346 unsigned int oldflags, mask, i;
347 struct super_block *sb = inode->i_sb;
348
349 /* Is it quota file? Do not allow user to mess with it */
350 if (ext4_is_quota_file(inode))
351 goto flags_out;
352
353 oldflags = ei->i_flags;
354 /*
355 * The JOURNAL_DATA flag can only be changed by
356 * the relevant capability.
357 */
358 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
359 if (!capable(CAP_SYS_RESOURCE))
360 goto flags_out;
361 }
362
363 if (!dax_compatible(inode, oldflags, flags)) {
364 err = -EOPNOTSUPP;
365 goto flags_out;
366 }
367
368 if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
369 migrate = 1;
370
371 if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
372 if (!ext4_has_feature_casefold(sb)) {
373 err = -EOPNOTSUPP;
374 goto flags_out;
375 }
376
377 if (!S_ISDIR(inode->i_mode)) {
378 err = -ENOTDIR;
379 goto flags_out;
380 }
381
382 if (!ext4_empty_dir(inode)) {
383 err = -ENOTEMPTY;
384 goto flags_out;
385 }
386 }
387
388 /*
389 * Wait for all pending directio and then flush all the dirty pages
390 * for this file. The flush marks all the pages readonly, so any
391 * subsequent attempt to write to the file (particularly mmap pages)
392 * will come through the filesystem and fail.
393 */
394 if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
395 (flags & EXT4_IMMUTABLE_FL)) {
396 inode_dio_wait(inode);
397 err = filemap_write_and_wait(inode->i_mapping);
398 if (err)
399 goto flags_out;
400 }
401
402 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
403 if (IS_ERR(handle)) {
404 err = PTR_ERR(handle);
405 goto flags_out;
406 }
407 if (IS_SYNC(inode))
408 ext4_handle_sync(handle);
409 err = ext4_reserve_inode_write(handle, inode, &iloc);
410 if (err)
411 goto flags_err;
412
413 ext4_dax_dontcache(inode, flags);
414
415 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
416 if (!(mask & EXT4_FL_USER_MODIFIABLE))
417 continue;
418 /* These flags get special treatment later */
419 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
420 continue;
421 if (mask & flags)
422 ext4_set_inode_flag(inode, i);
423 else
424 ext4_clear_inode_flag(inode, i);
425 }
426
427 ext4_set_inode_flags(inode, false);
428
429 inode->i_ctime = current_time(inode);
430
431 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
432 flags_err:
433 ext4_journal_stop(handle);
434 if (err)
435 goto flags_out;
436
437 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
438 /*
439 * Changes to the journaling mode can cause unsafe changes to
440 * S_DAX if the inode is DAX
441 */
442 if (IS_DAX(inode)) {
443 err = -EBUSY;
444 goto flags_out;
445 }
446
447 err = ext4_change_inode_journal_flag(inode,
448 flags & EXT4_JOURNAL_DATA_FL);
449 if (err)
450 goto flags_out;
451 }
452 if (migrate) {
453 if (flags & EXT4_EXTENTS_FL)
454 err = ext4_ext_migrate(inode);
455 else
456 err = ext4_ind_migrate(inode);
457 }
458
459 flags_out:
460 return err;
461 }
462
463 #ifdef CONFIG_QUOTA
ext4_ioctl_setproject(struct inode * inode,__u32 projid)464 static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
465 {
466 struct super_block *sb = inode->i_sb;
467 struct ext4_inode_info *ei = EXT4_I(inode);
468 int err, rc;
469 handle_t *handle;
470 kprojid_t kprojid;
471 struct ext4_iloc iloc;
472 struct ext4_inode *raw_inode;
473 struct dquot *transfer_to[MAXQUOTAS] = { };
474
475 if (!ext4_has_feature_project(sb)) {
476 if (projid != EXT4_DEF_PROJID)
477 return -EOPNOTSUPP;
478 else
479 return 0;
480 }
481
482 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
483 return -EOPNOTSUPP;
484
485 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
486
487 if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
488 return 0;
489
490 err = -EPERM;
491 /* Is it quota file? Do not allow user to mess with it */
492 if (ext4_is_quota_file(inode))
493 return err;
494
495 err = ext4_get_inode_loc(inode, &iloc);
496 if (err)
497 return err;
498
499 raw_inode = ext4_raw_inode(&iloc);
500 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
501 err = ext4_expand_extra_isize(inode,
502 EXT4_SB(sb)->s_want_extra_isize,
503 &iloc);
504 if (err)
505 return err;
506 } else {
507 brelse(iloc.bh);
508 }
509
510 err = dquot_initialize(inode);
511 if (err)
512 return err;
513
514 handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
515 EXT4_QUOTA_INIT_BLOCKS(sb) +
516 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
517 if (IS_ERR(handle))
518 return PTR_ERR(handle);
519
520 err = ext4_reserve_inode_write(handle, inode, &iloc);
521 if (err)
522 goto out_stop;
523
524 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
525 if (!IS_ERR(transfer_to[PRJQUOTA])) {
526
527 /* __dquot_transfer() calls back ext4_get_inode_usage() which
528 * counts xattr inode references.
529 */
530 down_read(&EXT4_I(inode)->xattr_sem);
531 err = __dquot_transfer(inode, transfer_to);
532 up_read(&EXT4_I(inode)->xattr_sem);
533 dqput(transfer_to[PRJQUOTA]);
534 if (err)
535 goto out_dirty;
536 }
537
538 EXT4_I(inode)->i_projid = kprojid;
539 inode->i_ctime = current_time(inode);
540 out_dirty:
541 rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
542 if (!err)
543 err = rc;
544 out_stop:
545 ext4_journal_stop(handle);
546 return err;
547 }
548 #else
ext4_ioctl_setproject(struct inode * inode,__u32 projid)549 static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
550 {
551 if (projid != EXT4_DEF_PROJID)
552 return -EOPNOTSUPP;
553 return 0;
554 }
555 #endif
556
ext4_shutdown(struct super_block * sb,unsigned long arg)557 static int ext4_shutdown(struct super_block *sb, unsigned long arg)
558 {
559 struct ext4_sb_info *sbi = EXT4_SB(sb);
560 __u32 flags;
561
562 if (!capable(CAP_SYS_ADMIN))
563 return -EPERM;
564
565 if (get_user(flags, (__u32 __user *)arg))
566 return -EFAULT;
567
568 if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
569 return -EINVAL;
570
571 if (ext4_forced_shutdown(sbi))
572 return 0;
573
574 ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
575 trace_ext4_shutdown(sb, flags);
576
577 switch (flags) {
578 case EXT4_GOING_FLAGS_DEFAULT:
579 freeze_bdev(sb->s_bdev);
580 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
581 thaw_bdev(sb->s_bdev);
582 break;
583 case EXT4_GOING_FLAGS_LOGFLUSH:
584 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
585 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
586 (void) ext4_force_commit(sb);
587 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
588 }
589 break;
590 case EXT4_GOING_FLAGS_NOLOGFLUSH:
591 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
592 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
593 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
594 break;
595 default:
596 return -EINVAL;
597 }
598 clear_opt(sb, DISCARD);
599 return 0;
600 }
601
602 struct getfsmap_info {
603 struct super_block *gi_sb;
604 struct fsmap_head __user *gi_data;
605 unsigned int gi_idx;
606 __u32 gi_last_flags;
607 };
608
ext4_getfsmap_format(struct ext4_fsmap * xfm,void * priv)609 static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
610 {
611 struct getfsmap_info *info = priv;
612 struct fsmap fm;
613
614 trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
615
616 info->gi_last_flags = xfm->fmr_flags;
617 ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
618 if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
619 sizeof(struct fsmap)))
620 return -EFAULT;
621
622 return 0;
623 }
624
ext4_ioc_getfsmap(struct super_block * sb,struct fsmap_head __user * arg)625 static int ext4_ioc_getfsmap(struct super_block *sb,
626 struct fsmap_head __user *arg)
627 {
628 struct getfsmap_info info = { NULL };
629 struct ext4_fsmap_head xhead = {0};
630 struct fsmap_head head;
631 bool aborted = false;
632 int error;
633
634 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
635 return -EFAULT;
636 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
637 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
638 sizeof(head.fmh_keys[0].fmr_reserved)) ||
639 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
640 sizeof(head.fmh_keys[1].fmr_reserved)))
641 return -EINVAL;
642 /*
643 * ext4 doesn't report file extents at all, so the only valid
644 * file offsets are the magic ones (all zeroes or all ones).
645 */
646 if (head.fmh_keys[0].fmr_offset ||
647 (head.fmh_keys[1].fmr_offset != 0 &&
648 head.fmh_keys[1].fmr_offset != -1ULL))
649 return -EINVAL;
650
651 xhead.fmh_iflags = head.fmh_iflags;
652 xhead.fmh_count = head.fmh_count;
653 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
654 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
655
656 trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
657 trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
658
659 info.gi_sb = sb;
660 info.gi_data = arg;
661 error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
662 if (error == EXT4_QUERY_RANGE_ABORT)
663 aborted = true;
664 else if (error)
665 return error;
666
667 /* If we didn't abort, set the "last" flag in the last fmx */
668 if (!aborted && info.gi_idx) {
669 info.gi_last_flags |= FMR_OF_LAST;
670 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
671 &info.gi_last_flags,
672 sizeof(info.gi_last_flags)))
673 return -EFAULT;
674 }
675
676 /* copy back header */
677 head.fmh_entries = xhead.fmh_entries;
678 head.fmh_oflags = xhead.fmh_oflags;
679 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
680 return -EFAULT;
681
682 return 0;
683 }
684
ext4_ioctl_group_add(struct file * file,struct ext4_new_group_data * input)685 static long ext4_ioctl_group_add(struct file *file,
686 struct ext4_new_group_data *input)
687 {
688 struct super_block *sb = file_inode(file)->i_sb;
689 int err, err2=0;
690
691 err = ext4_resize_begin(sb);
692 if (err)
693 return err;
694
695 if (ext4_has_feature_bigalloc(sb)) {
696 ext4_msg(sb, KERN_ERR,
697 "Online resizing not supported with bigalloc");
698 err = -EOPNOTSUPP;
699 goto group_add_out;
700 }
701
702 err = mnt_want_write_file(file);
703 if (err)
704 goto group_add_out;
705
706 err = ext4_group_add(sb, input);
707 if (EXT4_SB(sb)->s_journal) {
708 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
709 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
710 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
711 }
712 if (err == 0)
713 err = err2;
714 mnt_drop_write_file(file);
715 if (!err && ext4_has_group_desc_csum(sb) &&
716 test_opt(sb, INIT_INODE_TABLE))
717 err = ext4_register_li_request(sb, input->group);
718 group_add_out:
719 ext4_resize_end(sb);
720 return err;
721 }
722
ext4_fileattr_get(struct dentry * dentry,struct fileattr * fa)723 int ext4_fileattr_get(struct dentry *dentry, struct fileattr *fa)
724 {
725 struct inode *inode = d_inode(dentry);
726 struct ext4_inode_info *ei = EXT4_I(inode);
727 u32 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
728
729 if (S_ISREG(inode->i_mode))
730 flags &= ~FS_PROJINHERIT_FL;
731
732 fileattr_fill_flags(fa, flags);
733 if (ext4_has_feature_project(inode->i_sb))
734 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
735
736 return 0;
737 }
738
ext4_fileattr_set(struct user_namespace * mnt_userns,struct dentry * dentry,struct fileattr * fa)739 int ext4_fileattr_set(struct user_namespace *mnt_userns,
740 struct dentry *dentry, struct fileattr *fa)
741 {
742 struct inode *inode = d_inode(dentry);
743 u32 flags = fa->flags;
744 int err = -EOPNOTSUPP;
745
746 ext4_fc_start_update(inode);
747 if (flags & ~EXT4_FL_USER_VISIBLE)
748 goto out;
749
750 /*
751 * chattr(1) grabs flags via GETFLAGS, modifies the result and
752 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
753 * more restrictive than just silently masking off visible but
754 * not settable flags as we always did.
755 */
756 flags &= EXT4_FL_USER_MODIFIABLE;
757 if (ext4_mask_flags(inode->i_mode, flags) != flags)
758 goto out;
759 err = ext4_ioctl_check_immutable(inode, fa->fsx_projid, flags);
760 if (err)
761 goto out;
762 err = ext4_ioctl_setflags(inode, flags);
763 if (err)
764 goto out;
765 err = ext4_ioctl_setproject(inode, fa->fsx_projid);
766 out:
767 ext4_fc_stop_update(inode);
768 return err;
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
ext4_ioctl_get_es_cache(struct file * filp,unsigned long arg)774 static 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 int error;
781
782 if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
783 return -EFAULT;
784
785 if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
786 return -EINVAL;
787
788 fieinfo.fi_flags = fiemap.fm_flags;
789 fieinfo.fi_extents_max = fiemap.fm_extent_count;
790 fieinfo.fi_extents_start = ufiemap->fm_extents;
791
792 error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
793 fiemap.fm_length);
794 fiemap.fm_flags = fieinfo.fi_flags;
795 fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
796 if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
797 error = -EFAULT;
798
799 return error;
800 }
801
ext4_ioctl_checkpoint(struct file * filp,unsigned long arg)802 static int ext4_ioctl_checkpoint(struct file *filp, unsigned long arg)
803 {
804 int err = 0;
805 __u32 flags = 0;
806 unsigned int flush_flags = 0;
807 struct super_block *sb = file_inode(filp)->i_sb;
808 struct request_queue *q;
809
810 if (copy_from_user(&flags, (__u32 __user *)arg,
811 sizeof(__u32)))
812 return -EFAULT;
813
814 if (!capable(CAP_SYS_ADMIN))
815 return -EPERM;
816
817 /* check for invalid bits set */
818 if ((flags & ~EXT4_IOC_CHECKPOINT_FLAG_VALID) ||
819 ((flags & JBD2_JOURNAL_FLUSH_DISCARD) &&
820 (flags & JBD2_JOURNAL_FLUSH_ZEROOUT)))
821 return -EINVAL;
822
823 if (!EXT4_SB(sb)->s_journal)
824 return -ENODEV;
825
826 if (flags & ~EXT4_IOC_CHECKPOINT_FLAG_VALID)
827 return -EINVAL;
828
829 q = bdev_get_queue(EXT4_SB(sb)->s_journal->j_dev);
830 if (!q)
831 return -ENXIO;
832 if ((flags & JBD2_JOURNAL_FLUSH_DISCARD) && !blk_queue_discard(q))
833 return -EOPNOTSUPP;
834
835 if (flags & EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN)
836 return 0;
837
838 if (flags & EXT4_IOC_CHECKPOINT_FLAG_DISCARD)
839 flush_flags |= JBD2_JOURNAL_FLUSH_DISCARD;
840
841 if (flags & EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT) {
842 flush_flags |= JBD2_JOURNAL_FLUSH_ZEROOUT;
843 pr_info_ratelimited("warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow");
844 }
845
846 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
847 err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, flush_flags);
848 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
849
850 return err;
851 }
852
__ext4_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)853 static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
854 {
855 struct inode *inode = file_inode(filp);
856 struct super_block *sb = inode->i_sb;
857 struct user_namespace *mnt_userns = file_mnt_user_ns(filp);
858
859 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
860
861 switch (cmd) {
862 case FS_IOC_GETFSMAP:
863 return ext4_ioc_getfsmap(sb, (void __user *)arg);
864 case EXT4_IOC_GETVERSION:
865 case EXT4_IOC_GETVERSION_OLD:
866 return put_user(inode->i_generation, (int __user *) arg);
867 case EXT4_IOC_SETVERSION:
868 case EXT4_IOC_SETVERSION_OLD: {
869 handle_t *handle;
870 struct ext4_iloc iloc;
871 __u32 generation;
872 int err;
873
874 if (!inode_owner_or_capable(mnt_userns, inode))
875 return -EPERM;
876
877 if (ext4_has_metadata_csum(inode->i_sb)) {
878 ext4_warning(sb, "Setting inode version is not "
879 "supported with metadata_csum enabled.");
880 return -ENOTTY;
881 }
882
883 err = mnt_want_write_file(filp);
884 if (err)
885 return err;
886 if (get_user(generation, (int __user *) arg)) {
887 err = -EFAULT;
888 goto setversion_out;
889 }
890
891 inode_lock(inode);
892 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
893 if (IS_ERR(handle)) {
894 err = PTR_ERR(handle);
895 goto unlock_out;
896 }
897 err = ext4_reserve_inode_write(handle, inode, &iloc);
898 if (err == 0) {
899 inode->i_ctime = current_time(inode);
900 inode->i_generation = generation;
901 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
902 }
903 ext4_journal_stop(handle);
904
905 unlock_out:
906 inode_unlock(inode);
907 setversion_out:
908 mnt_drop_write_file(filp);
909 return err;
910 }
911 case EXT4_IOC_GROUP_EXTEND: {
912 ext4_fsblk_t n_blocks_count;
913 int err, err2=0;
914
915 err = ext4_resize_begin(sb);
916 if (err)
917 return err;
918
919 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
920 err = -EFAULT;
921 goto group_extend_out;
922 }
923
924 if (ext4_has_feature_bigalloc(sb)) {
925 ext4_msg(sb, KERN_ERR,
926 "Online resizing not supported with bigalloc");
927 err = -EOPNOTSUPP;
928 goto group_extend_out;
929 }
930
931 err = mnt_want_write_file(filp);
932 if (err)
933 goto group_extend_out;
934
935 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
936 if (EXT4_SB(sb)->s_journal) {
937 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
938 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
939 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
940 }
941 if (err == 0)
942 err = err2;
943 mnt_drop_write_file(filp);
944 group_extend_out:
945 ext4_resize_end(sb);
946 return err;
947 }
948
949 case EXT4_IOC_MOVE_EXT: {
950 struct move_extent me;
951 struct fd donor;
952 int err;
953
954 if (!(filp->f_mode & FMODE_READ) ||
955 !(filp->f_mode & FMODE_WRITE))
956 return -EBADF;
957
958 if (copy_from_user(&me,
959 (struct move_extent __user *)arg, sizeof(me)))
960 return -EFAULT;
961 me.moved_len = 0;
962
963 donor = fdget(me.donor_fd);
964 if (!donor.file)
965 return -EBADF;
966
967 if (!(donor.file->f_mode & FMODE_WRITE)) {
968 err = -EBADF;
969 goto mext_out;
970 }
971
972 if (ext4_has_feature_bigalloc(sb)) {
973 ext4_msg(sb, KERN_ERR,
974 "Online defrag not supported with bigalloc");
975 err = -EOPNOTSUPP;
976 goto mext_out;
977 } else if (IS_DAX(inode)) {
978 ext4_msg(sb, KERN_ERR,
979 "Online defrag not supported with DAX");
980 err = -EOPNOTSUPP;
981 goto mext_out;
982 }
983
984 err = mnt_want_write_file(filp);
985 if (err)
986 goto mext_out;
987
988 err = ext4_move_extents(filp, donor.file, me.orig_start,
989 me.donor_start, me.len, &me.moved_len);
990 mnt_drop_write_file(filp);
991
992 if (copy_to_user((struct move_extent __user *)arg,
993 &me, sizeof(me)))
994 err = -EFAULT;
995 mext_out:
996 fdput(donor);
997 return err;
998 }
999
1000 case EXT4_IOC_GROUP_ADD: {
1001 struct ext4_new_group_data input;
1002
1003 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
1004 sizeof(input)))
1005 return -EFAULT;
1006
1007 return ext4_ioctl_group_add(filp, &input);
1008 }
1009
1010 case EXT4_IOC_MIGRATE:
1011 {
1012 int err;
1013 if (!inode_owner_or_capable(mnt_userns, inode))
1014 return -EACCES;
1015
1016 err = mnt_want_write_file(filp);
1017 if (err)
1018 return err;
1019 /*
1020 * inode_mutex prevent write and truncate on the file.
1021 * Read still goes through. We take i_data_sem in
1022 * ext4_ext_swap_inode_data before we switch the
1023 * inode format to prevent read.
1024 */
1025 inode_lock((inode));
1026 err = ext4_ext_migrate(inode);
1027 inode_unlock((inode));
1028 mnt_drop_write_file(filp);
1029 return err;
1030 }
1031
1032 case EXT4_IOC_ALLOC_DA_BLKS:
1033 {
1034 int err;
1035 if (!inode_owner_or_capable(mnt_userns, inode))
1036 return -EACCES;
1037
1038 err = mnt_want_write_file(filp);
1039 if (err)
1040 return err;
1041 err = ext4_alloc_da_blocks(inode);
1042 mnt_drop_write_file(filp);
1043 return err;
1044 }
1045
1046 case EXT4_IOC_SWAP_BOOT:
1047 {
1048 int err;
1049 if (!(filp->f_mode & FMODE_WRITE))
1050 return -EBADF;
1051 err = mnt_want_write_file(filp);
1052 if (err)
1053 return err;
1054 err = swap_inode_boot_loader(sb, mnt_userns, inode);
1055 mnt_drop_write_file(filp);
1056 return err;
1057 }
1058
1059 case EXT4_IOC_RESIZE_FS: {
1060 ext4_fsblk_t n_blocks_count;
1061 int err = 0, err2 = 0;
1062 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
1063
1064 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
1065 sizeof(__u64))) {
1066 return -EFAULT;
1067 }
1068
1069 err = ext4_resize_begin(sb);
1070 if (err)
1071 return err;
1072
1073 err = mnt_want_write_file(filp);
1074 if (err)
1075 goto resizefs_out;
1076
1077 err = ext4_resize_fs(sb, n_blocks_count);
1078 if (EXT4_SB(sb)->s_journal) {
1079 ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE);
1080 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1081 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
1082 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1083 }
1084 if (err == 0)
1085 err = err2;
1086 mnt_drop_write_file(filp);
1087 if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
1088 ext4_has_group_desc_csum(sb) &&
1089 test_opt(sb, INIT_INODE_TABLE))
1090 err = ext4_register_li_request(sb, o_group);
1091
1092 resizefs_out:
1093 ext4_resize_end(sb);
1094 return err;
1095 }
1096
1097 case FITRIM:
1098 {
1099 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1100 struct fstrim_range range;
1101 int ret = 0;
1102
1103 if (!capable(CAP_SYS_ADMIN))
1104 return -EPERM;
1105
1106 if (!blk_queue_discard(q))
1107 return -EOPNOTSUPP;
1108
1109 /*
1110 * We haven't replayed the journal, so we cannot use our
1111 * block-bitmap-guided storage zapping commands.
1112 */
1113 if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
1114 return -EROFS;
1115
1116 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1117 sizeof(range)))
1118 return -EFAULT;
1119
1120 range.minlen = max((unsigned int)range.minlen,
1121 q->limits.discard_granularity);
1122 ret = ext4_trim_fs(sb, &range);
1123 if (ret < 0)
1124 return ret;
1125
1126 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1127 sizeof(range)))
1128 return -EFAULT;
1129
1130 return 0;
1131 }
1132 case EXT4_IOC_PRECACHE_EXTENTS:
1133 return ext4_ext_precache(inode);
1134
1135 case FS_IOC_SET_ENCRYPTION_POLICY:
1136 if (!ext4_has_feature_encrypt(sb))
1137 return -EOPNOTSUPP;
1138 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
1139
1140 case FS_IOC_GET_ENCRYPTION_PWSALT: {
1141 #ifdef CONFIG_FS_ENCRYPTION
1142 int err, err2;
1143 struct ext4_sb_info *sbi = EXT4_SB(sb);
1144 handle_t *handle;
1145
1146 if (!ext4_has_feature_encrypt(sb))
1147 return -EOPNOTSUPP;
1148 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
1149 err = mnt_want_write_file(filp);
1150 if (err)
1151 return err;
1152 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
1153 if (IS_ERR(handle)) {
1154 err = PTR_ERR(handle);
1155 goto pwsalt_err_exit;
1156 }
1157 err = ext4_journal_get_write_access(handle, sb,
1158 sbi->s_sbh,
1159 EXT4_JTR_NONE);
1160 if (err)
1161 goto pwsalt_err_journal;
1162 lock_buffer(sbi->s_sbh);
1163 generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
1164 ext4_superblock_csum_set(sb);
1165 unlock_buffer(sbi->s_sbh);
1166 err = ext4_handle_dirty_metadata(handle, NULL,
1167 sbi->s_sbh);
1168 pwsalt_err_journal:
1169 err2 = ext4_journal_stop(handle);
1170 if (err2 && !err)
1171 err = err2;
1172 pwsalt_err_exit:
1173 mnt_drop_write_file(filp);
1174 if (err)
1175 return err;
1176 }
1177 if (copy_to_user((void __user *) arg,
1178 sbi->s_es->s_encrypt_pw_salt, 16))
1179 return -EFAULT;
1180 return 0;
1181 #else
1182 return -EOPNOTSUPP;
1183 #endif
1184 }
1185 case FS_IOC_GET_ENCRYPTION_POLICY:
1186 if (!ext4_has_feature_encrypt(sb))
1187 return -EOPNOTSUPP;
1188 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1189
1190 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1191 if (!ext4_has_feature_encrypt(sb))
1192 return -EOPNOTSUPP;
1193 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1194
1195 case FS_IOC_ADD_ENCRYPTION_KEY:
1196 if (!ext4_has_feature_encrypt(sb))
1197 return -EOPNOTSUPP;
1198 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1199
1200 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1201 if (!ext4_has_feature_encrypt(sb))
1202 return -EOPNOTSUPP;
1203 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1204
1205 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1206 if (!ext4_has_feature_encrypt(sb))
1207 return -EOPNOTSUPP;
1208 return fscrypt_ioctl_remove_key_all_users(filp,
1209 (void __user *)arg);
1210 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1211 if (!ext4_has_feature_encrypt(sb))
1212 return -EOPNOTSUPP;
1213 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1214
1215 case FS_IOC_GET_ENCRYPTION_NONCE:
1216 if (!ext4_has_feature_encrypt(sb))
1217 return -EOPNOTSUPP;
1218 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
1219
1220 case EXT4_IOC_CLEAR_ES_CACHE:
1221 {
1222 if (!inode_owner_or_capable(mnt_userns, inode))
1223 return -EACCES;
1224 ext4_clear_inode_es(inode);
1225 return 0;
1226 }
1227
1228 case EXT4_IOC_GETSTATE:
1229 {
1230 __u32 state = 0;
1231
1232 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1233 state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1234 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1235 state |= EXT4_STATE_FLAG_NEW;
1236 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1237 state |= EXT4_STATE_FLAG_NEWENTRY;
1238 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1239 state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1240
1241 return put_user(state, (__u32 __user *) arg);
1242 }
1243
1244 case EXT4_IOC_GET_ES_CACHE:
1245 return ext4_ioctl_get_es_cache(filp, arg);
1246
1247 case EXT4_IOC_SHUTDOWN:
1248 return ext4_shutdown(sb, arg);
1249
1250 case FS_IOC_ENABLE_VERITY:
1251 if (!ext4_has_feature_verity(sb))
1252 return -EOPNOTSUPP;
1253 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1254
1255 case FS_IOC_MEASURE_VERITY:
1256 if (!ext4_has_feature_verity(sb))
1257 return -EOPNOTSUPP;
1258 return fsverity_ioctl_measure(filp, (void __user *)arg);
1259
1260 case FS_IOC_READ_VERITY_METADATA:
1261 if (!ext4_has_feature_verity(sb))
1262 return -EOPNOTSUPP;
1263 return fsverity_ioctl_read_metadata(filp,
1264 (const void __user *)arg);
1265
1266 case EXT4_IOC_CHECKPOINT:
1267 return ext4_ioctl_checkpoint(filp, arg);
1268
1269 default:
1270 return -ENOTTY;
1271 }
1272 }
1273
ext4_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1274 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1275 {
1276 long ret;
1277
1278 ext4_fc_start_update(file_inode(filp));
1279 ret = __ext4_ioctl(filp, cmd, arg);
1280 ext4_fc_stop_update(file_inode(filp));
1281
1282 return ret;
1283 }
1284
1285 #ifdef CONFIG_COMPAT
ext4_compat_ioctl(struct file * file,unsigned int cmd,unsigned long arg)1286 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1287 {
1288 /* These are just misnamed, they actually get/put from/to user an int */
1289 switch (cmd) {
1290 case EXT4_IOC32_GETVERSION:
1291 cmd = EXT4_IOC_GETVERSION;
1292 break;
1293 case EXT4_IOC32_SETVERSION:
1294 cmd = EXT4_IOC_SETVERSION;
1295 break;
1296 case EXT4_IOC32_GROUP_EXTEND:
1297 cmd = EXT4_IOC_GROUP_EXTEND;
1298 break;
1299 case EXT4_IOC32_GETVERSION_OLD:
1300 cmd = EXT4_IOC_GETVERSION_OLD;
1301 break;
1302 case EXT4_IOC32_SETVERSION_OLD:
1303 cmd = EXT4_IOC_SETVERSION_OLD;
1304 break;
1305 case EXT4_IOC32_GETRSVSZ:
1306 cmd = EXT4_IOC_GETRSVSZ;
1307 break;
1308 case EXT4_IOC32_SETRSVSZ:
1309 cmd = EXT4_IOC_SETRSVSZ;
1310 break;
1311 case EXT4_IOC32_GROUP_ADD: {
1312 struct compat_ext4_new_group_input __user *uinput;
1313 struct ext4_new_group_data input;
1314 int err;
1315
1316 uinput = compat_ptr(arg);
1317 err = get_user(input.group, &uinput->group);
1318 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1319 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1320 err |= get_user(input.inode_table, &uinput->inode_table);
1321 err |= get_user(input.blocks_count, &uinput->blocks_count);
1322 err |= get_user(input.reserved_blocks,
1323 &uinput->reserved_blocks);
1324 if (err)
1325 return -EFAULT;
1326 return ext4_ioctl_group_add(file, &input);
1327 }
1328 case EXT4_IOC_MOVE_EXT:
1329 case EXT4_IOC_RESIZE_FS:
1330 case FITRIM:
1331 case EXT4_IOC_PRECACHE_EXTENTS:
1332 case FS_IOC_SET_ENCRYPTION_POLICY:
1333 case FS_IOC_GET_ENCRYPTION_PWSALT:
1334 case FS_IOC_GET_ENCRYPTION_POLICY:
1335 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1336 case FS_IOC_ADD_ENCRYPTION_KEY:
1337 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1338 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1339 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1340 case FS_IOC_GET_ENCRYPTION_NONCE:
1341 case EXT4_IOC_SHUTDOWN:
1342 case FS_IOC_GETFSMAP:
1343 case FS_IOC_ENABLE_VERITY:
1344 case FS_IOC_MEASURE_VERITY:
1345 case FS_IOC_READ_VERITY_METADATA:
1346 case EXT4_IOC_CLEAR_ES_CACHE:
1347 case EXT4_IOC_GETSTATE:
1348 case EXT4_IOC_GET_ES_CACHE:
1349 case EXT4_IOC_CHECKPOINT:
1350 break;
1351 default:
1352 return -ENOIOCTLCMD;
1353 }
1354 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1355 }
1356 #endif
1357
