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 */
memswap(void * a,void * b,size_t len)37 static void memswap(void *a, void *b, size_t len)
38 {
39 unsigned char *ap, *bp;
40
41 ap = (unsigned char *)a;
42 bp = (unsigned char *)b;
43 while (len-- > 0) {
44 swap(*ap, *bp);
45 ap++;
46 bp++;
47 }
48 }
49
50 /**
51 * Swap i_data and associated attributes between @inode1 and @inode2.
52 * This function is used for the primary swap between inode1 and inode2
53 * and also to revert this primary swap in case of errors.
54 *
55 * Therefore you have to make sure, that calling this method twice
56 * will revert all changes.
57 *
58 * @inode1: pointer to first inode
59 * @inode2: pointer to second inode
60 */
swap_inode_data(struct inode * inode1,struct inode * inode2)61 static void swap_inode_data(struct inode *inode1, struct inode *inode2)
62 {
63 loff_t isize;
64 struct ext4_inode_info *ei1;
65 struct ext4_inode_info *ei2;
66 unsigned long tmp;
67
68 ei1 = EXT4_I(inode1);
69 ei2 = EXT4_I(inode2);
70
71 swap(inode1->i_version, inode2->i_version);
72 swap(inode1->i_atime, inode2->i_atime);
73 swap(inode1->i_mtime, inode2->i_mtime);
74
75 memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
76 tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP;
77 ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) |
78 (ei1->i_flags & ~EXT4_FL_SHOULD_SWAP);
79 ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP);
80 swap(ei1->i_disksize, ei2->i_disksize);
81 ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
82 ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
83
84 isize = i_size_read(inode1);
85 i_size_write(inode1, i_size_read(inode2));
86 i_size_write(inode2, isize);
87 }
88
ext4_reset_inode_seed(struct inode * inode)89 void ext4_reset_inode_seed(struct inode *inode)
90 {
91 struct ext4_inode_info *ei = EXT4_I(inode);
92 struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
93 __le32 inum = cpu_to_le32(inode->i_ino);
94 __le32 gen = cpu_to_le32(inode->i_generation);
95 __u32 csum;
96
97 if (!ext4_has_metadata_csum(inode->i_sb))
98 return;
99
100 csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum));
101 ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen));
102 }
103
104 /**
105 * Swap the information from the given @inode and the inode
106 * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
107 * important fields of the inodes.
108 *
109 * @sb: the super block of the filesystem
110 * @inode: the inode to swap with EXT4_BOOT_LOADER_INO
111 *
112 */
swap_inode_boot_loader(struct super_block * sb,struct inode * inode)113 static long swap_inode_boot_loader(struct super_block *sb,
114 struct inode *inode)
115 {
116 handle_t *handle;
117 int err;
118 struct inode *inode_bl;
119 struct ext4_inode_info *ei_bl;
120 qsize_t size, size_bl, diff;
121 blkcnt_t blocks;
122 unsigned short bytes;
123
124 inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO,
125 EXT4_IGET_SPECIAL | EXT4_IGET_BAD);
126 if (IS_ERR(inode_bl))
127 return PTR_ERR(inode_bl);
128 ei_bl = EXT4_I(inode_bl);
129
130 /* Protect orig inodes against a truncate and make sure,
131 * that only 1 swap_inode_boot_loader is running. */
132 lock_two_nondirectories(inode, inode_bl);
133
134 if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
135 IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
136 (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
137 ext4_has_inline_data(inode)) {
138 err = -EINVAL;
139 goto journal_err_out;
140 }
141
142 if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
143 !inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) {
144 err = -EPERM;
145 goto journal_err_out;
146 }
147
148 down_write(&EXT4_I(inode)->i_mmap_sem);
149 err = filemap_write_and_wait(inode->i_mapping);
150 if (err)
151 goto err_out;
152
153 err = filemap_write_and_wait(inode_bl->i_mapping);
154 if (err)
155 goto err_out;
156
157 /* Wait for all existing dio workers */
158 inode_dio_wait(inode);
159 inode_dio_wait(inode_bl);
160
161 truncate_inode_pages(&inode->i_data, 0);
162 truncate_inode_pages(&inode_bl->i_data, 0);
163
164 handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
165 if (IS_ERR(handle)) {
166 err = -EINVAL;
167 goto err_out;
168 }
169 ext4_fc_start_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT);
170
171 /* Protect extent tree against block allocations via delalloc */
172 ext4_double_down_write_data_sem(inode, inode_bl);
173
174 if (is_bad_inode(inode_bl) || !S_ISREG(inode_bl->i_mode)) {
175 /* this inode has never been used as a BOOT_LOADER */
176 set_nlink(inode_bl, 1);
177 i_uid_write(inode_bl, 0);
178 i_gid_write(inode_bl, 0);
179 inode_bl->i_flags = 0;
180 ei_bl->i_flags = 0;
181 inode_set_iversion(inode_bl, 1);
182 i_size_write(inode_bl, 0);
183 EXT4_I(inode_bl)->i_disksize = inode_bl->i_size;
184 inode_bl->i_mode = S_IFREG;
185 if (ext4_has_feature_extents(sb)) {
186 ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
187 ext4_ext_tree_init(handle, inode_bl);
188 } else
189 memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
190 }
191
192 err = dquot_initialize(inode);
193 if (err)
194 goto err_out1;
195
196 size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
197 size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
198 diff = size - size_bl;
199 swap_inode_data(inode, inode_bl);
200
201 inode->i_ctime = inode_bl->i_ctime = current_time(inode);
202
203 inode->i_generation = prandom_u32();
204 inode_bl->i_generation = prandom_u32();
205 ext4_reset_inode_seed(inode);
206 ext4_reset_inode_seed(inode_bl);
207
208 ext4_discard_preallocations(inode, 0);
209
210 err = ext4_mark_inode_dirty(handle, inode);
211 if (err < 0) {
212 /* No need to update quota information. */
213 ext4_warning(inode->i_sb,
214 "couldn't mark inode #%lu dirty (err %d)",
215 inode->i_ino, err);
216 /* Revert all changes: */
217 swap_inode_data(inode, inode_bl);
218 ext4_mark_inode_dirty(handle, inode);
219 goto err_out1;
220 }
221
222 blocks = inode_bl->i_blocks;
223 bytes = inode_bl->i_bytes;
224 inode_bl->i_blocks = inode->i_blocks;
225 inode_bl->i_bytes = inode->i_bytes;
226 err = ext4_mark_inode_dirty(handle, inode_bl);
227 if (err < 0) {
228 /* No need to update quota information. */
229 ext4_warning(inode_bl->i_sb,
230 "couldn't mark inode #%lu dirty (err %d)",
231 inode_bl->i_ino, err);
232 goto revert;
233 }
234
235 /* Bootloader inode should not be counted into quota information. */
236 if (diff > 0)
237 dquot_free_space(inode, diff);
238 else
239 err = dquot_alloc_space(inode, -1 * diff);
240
241 if (err < 0) {
242 revert:
243 /* Revert all changes: */
244 inode_bl->i_blocks = blocks;
245 inode_bl->i_bytes = bytes;
246 swap_inode_data(inode, inode_bl);
247 ext4_mark_inode_dirty(handle, inode);
248 ext4_mark_inode_dirty(handle, inode_bl);
249 }
250
251 err_out1:
252 ext4_journal_stop(handle);
253 ext4_fc_stop_ineligible(sb);
254 ext4_double_up_write_data_sem(inode, inode_bl);
255
256 err_out:
257 up_write(&EXT4_I(inode)->i_mmap_sem);
258 journal_err_out:
259 unlock_two_nondirectories(inode, inode_bl);
260 iput(inode_bl);
261 return err;
262 }
263
264 #ifdef CONFIG_FS_ENCRYPTION
uuid_is_zero(__u8 u[16])265 static int uuid_is_zero(__u8 u[16])
266 {
267 int i;
268
269 for (i = 0; i < 16; i++)
270 if (u[i])
271 return 0;
272 return 1;
273 }
274 #endif
275
276 /*
277 * If immutable is set and we are not clearing it, we're not allowed to change
278 * anything else in the inode. Don't error out if we're only trying to set
279 * immutable on an immutable file.
280 */
ext4_ioctl_check_immutable(struct inode * inode,__u32 new_projid,unsigned int flags)281 static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
282 unsigned int flags)
283 {
284 struct ext4_inode_info *ei = EXT4_I(inode);
285 unsigned int oldflags = ei->i_flags;
286
287 if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
288 return 0;
289
290 if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
291 return -EPERM;
292 if (ext4_has_feature_project(inode->i_sb) &&
293 __kprojid_val(ei->i_projid) != new_projid)
294 return -EPERM;
295
296 return 0;
297 }
298
ext4_dax_dontcache(struct inode * inode,unsigned int flags)299 static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
300 {
301 struct ext4_inode_info *ei = EXT4_I(inode);
302
303 if (S_ISDIR(inode->i_mode))
304 return;
305
306 if (test_opt2(inode->i_sb, DAX_NEVER) ||
307 test_opt(inode->i_sb, DAX_ALWAYS))
308 return;
309
310 if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
311 d_mark_dontcache(inode);
312 }
313
dax_compatible(struct inode * inode,unsigned int oldflags,unsigned int flags)314 static bool dax_compatible(struct inode *inode, unsigned int oldflags,
315 unsigned int flags)
316 {
317 /* Allow the DAX flag to be changed on inline directories */
318 if (S_ISDIR(inode->i_mode)) {
319 flags &= ~EXT4_INLINE_DATA_FL;
320 oldflags &= ~EXT4_INLINE_DATA_FL;
321 }
322
323 if (flags & EXT4_DAX_FL) {
324 if ((oldflags & EXT4_DAX_MUT_EXCL) ||
325 ext4_test_inode_state(inode,
326 EXT4_STATE_VERITY_IN_PROGRESS)) {
327 return false;
328 }
329 }
330
331 if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
332 return false;
333
334 return true;
335 }
336
ext4_ioctl_setflags(struct inode * inode,unsigned int flags)337 static int ext4_ioctl_setflags(struct inode *inode,
338 unsigned int flags)
339 {
340 struct ext4_inode_info *ei = EXT4_I(inode);
341 handle_t *handle = NULL;
342 int err = -EPERM, migrate = 0;
343 struct ext4_iloc iloc;
344 unsigned int oldflags, mask, i;
345 struct super_block *sb = inode->i_sb;
346
347 /* Is it quota file? Do not allow user to mess with it */
348 if (ext4_is_quota_file(inode))
349 goto flags_out;
350
351 oldflags = ei->i_flags;
352
353 err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
354 if (err)
355 goto flags_out;
356
357 /*
358 * The JOURNAL_DATA flag can only be changed by
359 * the relevant capability.
360 */
361 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
362 if (!capable(CAP_SYS_RESOURCE))
363 goto flags_out;
364 }
365
366 if (!dax_compatible(inode, oldflags, flags)) {
367 err = -EOPNOTSUPP;
368 goto flags_out;
369 }
370
371 if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
372 migrate = 1;
373
374 if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
375 if (!ext4_has_feature_casefold(sb)) {
376 err = -EOPNOTSUPP;
377 goto flags_out;
378 }
379
380 if (!S_ISDIR(inode->i_mode)) {
381 err = -ENOTDIR;
382 goto flags_out;
383 }
384
385 if (!ext4_empty_dir(inode)) {
386 err = -ENOTEMPTY;
387 goto flags_out;
388 }
389 }
390
391 /*
392 * Wait for all pending directio and then flush all the dirty pages
393 * for this file. The flush marks all the pages readonly, so any
394 * subsequent attempt to write to the file (particularly mmap pages)
395 * will come through the filesystem and fail.
396 */
397 if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
398 (flags & EXT4_IMMUTABLE_FL)) {
399 inode_dio_wait(inode);
400 err = filemap_write_and_wait(inode->i_mapping);
401 if (err)
402 goto flags_out;
403 }
404
405 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
406 if (IS_ERR(handle)) {
407 err = PTR_ERR(handle);
408 goto flags_out;
409 }
410 if (IS_SYNC(inode))
411 ext4_handle_sync(handle);
412 err = ext4_reserve_inode_write(handle, inode, &iloc);
413 if (err)
414 goto flags_err;
415
416 ext4_dax_dontcache(inode, flags);
417
418 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
419 if (!(mask & EXT4_FL_USER_MODIFIABLE))
420 continue;
421 /* These flags get special treatment later */
422 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
423 continue;
424 if (mask & flags)
425 ext4_set_inode_flag(inode, i);
426 else
427 ext4_clear_inode_flag(inode, i);
428 }
429
430 ext4_set_inode_flags(inode, false);
431
432 inode->i_ctime = current_time(inode);
433
434 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
435 flags_err:
436 ext4_journal_stop(handle);
437 if (err)
438 goto flags_out;
439
440 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
441 /*
442 * Changes to the journaling mode can cause unsafe changes to
443 * S_DAX if the inode is DAX
444 */
445 if (IS_DAX(inode)) {
446 err = -EBUSY;
447 goto flags_out;
448 }
449
450 err = ext4_change_inode_journal_flag(inode,
451 flags & EXT4_JOURNAL_DATA_FL);
452 if (err)
453 goto flags_out;
454 }
455 if (migrate) {
456 if (flags & EXT4_EXTENTS_FL)
457 err = ext4_ext_migrate(inode);
458 else
459 err = ext4_ind_migrate(inode);
460 }
461
462 flags_out:
463 return err;
464 }
465
466 #ifdef CONFIG_QUOTA
ext4_ioctl_setproject(struct file * filp,__u32 projid)467 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
468 {
469 struct inode *inode = file_inode(filp);
470 struct super_block *sb = inode->i_sb;
471 struct ext4_inode_info *ei = EXT4_I(inode);
472 int err, rc;
473 handle_t *handle;
474 kprojid_t kprojid;
475 struct ext4_iloc iloc;
476 struct ext4_inode *raw_inode;
477 struct dquot *transfer_to[MAXQUOTAS] = { };
478
479 if (!ext4_has_feature_project(sb)) {
480 if (projid != EXT4_DEF_PROJID)
481 return -EOPNOTSUPP;
482 else
483 return 0;
484 }
485
486 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
487 return -EOPNOTSUPP;
488
489 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
490
491 if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
492 return 0;
493
494 err = -EPERM;
495 /* Is it quota file? Do not allow user to mess with it */
496 if (ext4_is_quota_file(inode))
497 return err;
498
499 err = dquot_initialize(inode);
500 if (err)
501 return err;
502
503 err = ext4_get_inode_loc(inode, &iloc);
504 if (err)
505 return err;
506
507 raw_inode = ext4_raw_inode(&iloc);
508 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
509 err = ext4_expand_extra_isize(inode,
510 EXT4_SB(sb)->s_want_extra_isize,
511 &iloc);
512 if (err)
513 return err;
514 } else {
515 brelse(iloc.bh);
516 }
517
518 handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
519 EXT4_QUOTA_INIT_BLOCKS(sb) +
520 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
521 if (IS_ERR(handle))
522 return PTR_ERR(handle);
523
524 err = ext4_reserve_inode_write(handle, inode, &iloc);
525 if (err)
526 goto out_stop;
527
528 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
529 if (!IS_ERR(transfer_to[PRJQUOTA])) {
530
531 /* __dquot_transfer() calls back ext4_get_inode_usage() which
532 * counts xattr inode references.
533 */
534 down_read(&EXT4_I(inode)->xattr_sem);
535 err = __dquot_transfer(inode, transfer_to);
536 up_read(&EXT4_I(inode)->xattr_sem);
537 dqput(transfer_to[PRJQUOTA]);
538 if (err)
539 goto out_dirty;
540 }
541
542 EXT4_I(inode)->i_projid = kprojid;
543 inode->i_ctime = current_time(inode);
544 out_dirty:
545 rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
546 if (!err)
547 err = rc;
548 out_stop:
549 ext4_journal_stop(handle);
550 return err;
551 }
552 #else
ext4_ioctl_setproject(struct file * filp,__u32 projid)553 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
554 {
555 if (projid != EXT4_DEF_PROJID)
556 return -EOPNOTSUPP;
557 return 0;
558 }
559 #endif
560
561 /* Transfer internal flags to xflags */
ext4_iflags_to_xflags(unsigned long iflags)562 static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
563 {
564 __u32 xflags = 0;
565
566 if (iflags & EXT4_SYNC_FL)
567 xflags |= FS_XFLAG_SYNC;
568 if (iflags & EXT4_IMMUTABLE_FL)
569 xflags |= FS_XFLAG_IMMUTABLE;
570 if (iflags & EXT4_APPEND_FL)
571 xflags |= FS_XFLAG_APPEND;
572 if (iflags & EXT4_NODUMP_FL)
573 xflags |= FS_XFLAG_NODUMP;
574 if (iflags & EXT4_NOATIME_FL)
575 xflags |= FS_XFLAG_NOATIME;
576 if (iflags & EXT4_PROJINHERIT_FL)
577 xflags |= FS_XFLAG_PROJINHERIT;
578 if (iflags & EXT4_DAX_FL)
579 xflags |= FS_XFLAG_DAX;
580 return xflags;
581 }
582
583 #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
584 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
585 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT | \
586 FS_XFLAG_DAX)
587
588 /* Transfer xflags flags to internal */
ext4_xflags_to_iflags(__u32 xflags)589 static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
590 {
591 unsigned long iflags = 0;
592
593 if (xflags & FS_XFLAG_SYNC)
594 iflags |= EXT4_SYNC_FL;
595 if (xflags & FS_XFLAG_IMMUTABLE)
596 iflags |= EXT4_IMMUTABLE_FL;
597 if (xflags & FS_XFLAG_APPEND)
598 iflags |= EXT4_APPEND_FL;
599 if (xflags & FS_XFLAG_NODUMP)
600 iflags |= EXT4_NODUMP_FL;
601 if (xflags & FS_XFLAG_NOATIME)
602 iflags |= EXT4_NOATIME_FL;
603 if (xflags & FS_XFLAG_PROJINHERIT)
604 iflags |= EXT4_PROJINHERIT_FL;
605 if (xflags & FS_XFLAG_DAX)
606 iflags |= EXT4_DAX_FL;
607
608 return iflags;
609 }
610
ext4_shutdown(struct super_block * sb,unsigned long arg)611 static int ext4_shutdown(struct super_block *sb, unsigned long arg)
612 {
613 struct ext4_sb_info *sbi = EXT4_SB(sb);
614 __u32 flags;
615 int ret;
616
617 if (!capable(CAP_SYS_ADMIN))
618 return -EPERM;
619
620 if (get_user(flags, (__u32 __user *)arg))
621 return -EFAULT;
622
623 if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
624 return -EINVAL;
625
626 if (ext4_forced_shutdown(sbi))
627 return 0;
628
629 ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
630 trace_ext4_shutdown(sb, flags);
631
632 switch (flags) {
633 case EXT4_GOING_FLAGS_DEFAULT:
634 ret = freeze_bdev(sb->s_bdev);
635 if (ret)
636 return ret;
637 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
638 thaw_bdev(sb->s_bdev);
639 break;
640 case EXT4_GOING_FLAGS_LOGFLUSH:
641 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
642 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
643 (void) ext4_force_commit(sb);
644 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
645 }
646 break;
647 case EXT4_GOING_FLAGS_NOLOGFLUSH:
648 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
649 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
650 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
651 break;
652 default:
653 return -EINVAL;
654 }
655 clear_opt(sb, DISCARD);
656 return 0;
657 }
658
659 struct getfsmap_info {
660 struct super_block *gi_sb;
661 struct fsmap_head __user *gi_data;
662 unsigned int gi_idx;
663 __u32 gi_last_flags;
664 };
665
ext4_getfsmap_format(struct ext4_fsmap * xfm,void * priv)666 static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
667 {
668 struct getfsmap_info *info = priv;
669 struct fsmap fm;
670
671 trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
672
673 info->gi_last_flags = xfm->fmr_flags;
674 ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
675 if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
676 sizeof(struct fsmap)))
677 return -EFAULT;
678
679 return 0;
680 }
681
ext4_ioc_getfsmap(struct super_block * sb,struct fsmap_head __user * arg)682 static int ext4_ioc_getfsmap(struct super_block *sb,
683 struct fsmap_head __user *arg)
684 {
685 struct getfsmap_info info = { NULL };
686 struct ext4_fsmap_head xhead = {0};
687 struct fsmap_head head;
688 bool aborted = false;
689 int error;
690
691 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
692 return -EFAULT;
693 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
694 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
695 sizeof(head.fmh_keys[0].fmr_reserved)) ||
696 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
697 sizeof(head.fmh_keys[1].fmr_reserved)))
698 return -EINVAL;
699 /*
700 * ext4 doesn't report file extents at all, so the only valid
701 * file offsets are the magic ones (all zeroes or all ones).
702 */
703 if (head.fmh_keys[0].fmr_offset ||
704 (head.fmh_keys[1].fmr_offset != 0 &&
705 head.fmh_keys[1].fmr_offset != -1ULL))
706 return -EINVAL;
707
708 xhead.fmh_iflags = head.fmh_iflags;
709 xhead.fmh_count = head.fmh_count;
710 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
711 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
712
713 trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
714 trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
715
716 info.gi_sb = sb;
717 info.gi_data = arg;
718 error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
719 if (error == EXT4_QUERY_RANGE_ABORT) {
720 error = 0;
721 aborted = true;
722 } else if (error)
723 return error;
724
725 /* If we didn't abort, set the "last" flag in the last fmx */
726 if (!aborted && info.gi_idx) {
727 info.gi_last_flags |= FMR_OF_LAST;
728 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
729 &info.gi_last_flags,
730 sizeof(info.gi_last_flags)))
731 return -EFAULT;
732 }
733
734 /* copy back header */
735 head.fmh_entries = xhead.fmh_entries;
736 head.fmh_oflags = xhead.fmh_oflags;
737 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
738 return -EFAULT;
739
740 return 0;
741 }
742
ext4_ioctl_group_add(struct file * file,struct ext4_new_group_data * input)743 static long ext4_ioctl_group_add(struct file *file,
744 struct ext4_new_group_data *input)
745 {
746 struct super_block *sb = file_inode(file)->i_sb;
747 int err, err2=0;
748
749 err = ext4_resize_begin(sb);
750 if (err)
751 return err;
752
753 if (ext4_has_feature_bigalloc(sb)) {
754 ext4_msg(sb, KERN_ERR,
755 "Online resizing not supported with bigalloc");
756 err = -EOPNOTSUPP;
757 goto group_add_out;
758 }
759
760 err = mnt_want_write_file(file);
761 if (err)
762 goto group_add_out;
763
764 err = ext4_group_add(sb, input);
765 if (EXT4_SB(sb)->s_journal) {
766 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
767 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
768 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
769 }
770 if (err == 0)
771 err = err2;
772 mnt_drop_write_file(file);
773 if (!err && ext4_has_group_desc_csum(sb) &&
774 test_opt(sb, INIT_INODE_TABLE))
775 err = ext4_register_li_request(sb, input->group);
776 group_add_out:
777 ext4_resize_end(sb);
778 return err;
779 }
780
ext4_fill_fsxattr(struct inode * inode,struct fsxattr * fa)781 static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
782 {
783 struct ext4_inode_info *ei = EXT4_I(inode);
784
785 simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags &
786 EXT4_FL_USER_VISIBLE));
787
788 if (ext4_has_feature_project(inode->i_sb))
789 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
790 }
791
792 /* So that the fiemap access checks can't overflow on 32 bit machines. */
793 #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
794
ext4_ioctl_get_es_cache(struct file * filp,unsigned long arg)795 static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
796 {
797 struct fiemap fiemap;
798 struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
799 struct fiemap_extent_info fieinfo = { 0, };
800 struct inode *inode = file_inode(filp);
801 int error;
802
803 if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
804 return -EFAULT;
805
806 if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
807 return -EINVAL;
808
809 fieinfo.fi_flags = fiemap.fm_flags;
810 fieinfo.fi_extents_max = fiemap.fm_extent_count;
811 fieinfo.fi_extents_start = ufiemap->fm_extents;
812
813 error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
814 fiemap.fm_length);
815 fiemap.fm_flags = fieinfo.fi_flags;
816 fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
817 if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
818 error = -EFAULT;
819
820 return error;
821 }
822
__ext4_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)823 static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
824 {
825 struct inode *inode = file_inode(filp);
826 struct super_block *sb = inode->i_sb;
827 struct ext4_inode_info *ei = EXT4_I(inode);
828 unsigned int flags;
829
830 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
831
832 switch (cmd) {
833 case FS_IOC_GETFSMAP:
834 return ext4_ioc_getfsmap(sb, (void __user *)arg);
835 case FS_IOC_GETFLAGS:
836 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
837 if (S_ISREG(inode->i_mode))
838 flags &= ~EXT4_PROJINHERIT_FL;
839 return put_user(flags, (int __user *) arg);
840 case FS_IOC_SETFLAGS: {
841 int err;
842
843 if (!inode_owner_or_capable(inode))
844 return -EACCES;
845
846 if (get_user(flags, (int __user *) arg))
847 return -EFAULT;
848
849 if (flags & ~EXT4_FL_USER_VISIBLE)
850 return -EOPNOTSUPP;
851 /*
852 * chattr(1) grabs flags via GETFLAGS, modifies the result and
853 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
854 * more restrictive than just silently masking off visible but
855 * not settable flags as we always did.
856 */
857 flags &= EXT4_FL_USER_MODIFIABLE;
858 if (ext4_mask_flags(inode->i_mode, flags) != flags)
859 return -EOPNOTSUPP;
860
861 err = mnt_want_write_file(filp);
862 if (err)
863 return err;
864
865 inode_lock(inode);
866 err = ext4_ioctl_check_immutable(inode,
867 from_kprojid(&init_user_ns, ei->i_projid),
868 flags);
869 if (!err)
870 err = ext4_ioctl_setflags(inode, flags);
871 inode_unlock(inode);
872 mnt_drop_write_file(filp);
873 return err;
874 }
875 case EXT4_IOC_GETVERSION:
876 case EXT4_IOC_GETVERSION_OLD:
877 return put_user(inode->i_generation, (int __user *) arg);
878 case EXT4_IOC_SETVERSION:
879 case EXT4_IOC_SETVERSION_OLD: {
880 handle_t *handle;
881 struct ext4_iloc iloc;
882 __u32 generation;
883 int err;
884
885 if (!inode_owner_or_capable(inode))
886 return -EPERM;
887
888 if (ext4_has_metadata_csum(inode->i_sb)) {
889 ext4_warning(sb, "Setting inode version is not "
890 "supported with metadata_csum enabled.");
891 return -ENOTTY;
892 }
893
894 err = mnt_want_write_file(filp);
895 if (err)
896 return err;
897 if (get_user(generation, (int __user *) arg)) {
898 err = -EFAULT;
899 goto setversion_out;
900 }
901
902 inode_lock(inode);
903 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
904 if (IS_ERR(handle)) {
905 err = PTR_ERR(handle);
906 goto unlock_out;
907 }
908 err = ext4_reserve_inode_write(handle, inode, &iloc);
909 if (err == 0) {
910 inode->i_ctime = current_time(inode);
911 inode->i_generation = generation;
912 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
913 }
914 ext4_journal_stop(handle);
915
916 unlock_out:
917 inode_unlock(inode);
918 setversion_out:
919 mnt_drop_write_file(filp);
920 return err;
921 }
922 case EXT4_IOC_GROUP_EXTEND: {
923 ext4_fsblk_t n_blocks_count;
924 int err, err2=0;
925
926 err = ext4_resize_begin(sb);
927 if (err)
928 return err;
929
930 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
931 err = -EFAULT;
932 goto group_extend_out;
933 }
934
935 if (ext4_has_feature_bigalloc(sb)) {
936 ext4_msg(sb, KERN_ERR,
937 "Online resizing not supported with bigalloc");
938 err = -EOPNOTSUPP;
939 goto group_extend_out;
940 }
941
942 err = mnt_want_write_file(filp);
943 if (err)
944 goto group_extend_out;
945
946 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
947 if (EXT4_SB(sb)->s_journal) {
948 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
949 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
950 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
951 }
952 if (err == 0)
953 err = err2;
954 mnt_drop_write_file(filp);
955 group_extend_out:
956 ext4_resize_end(sb);
957 return err;
958 }
959
960 case EXT4_IOC_MOVE_EXT: {
961 struct move_extent me;
962 struct fd donor;
963 int err;
964
965 if (!(filp->f_mode & FMODE_READ) ||
966 !(filp->f_mode & FMODE_WRITE))
967 return -EBADF;
968
969 if (copy_from_user(&me,
970 (struct move_extent __user *)arg, sizeof(me)))
971 return -EFAULT;
972 me.moved_len = 0;
973
974 donor = fdget(me.donor_fd);
975 if (!donor.file)
976 return -EBADF;
977
978 if (!(donor.file->f_mode & FMODE_WRITE)) {
979 err = -EBADF;
980 goto mext_out;
981 }
982
983 if (ext4_has_feature_bigalloc(sb)) {
984 ext4_msg(sb, KERN_ERR,
985 "Online defrag not supported with bigalloc");
986 err = -EOPNOTSUPP;
987 goto mext_out;
988 } else if (IS_DAX(inode)) {
989 ext4_msg(sb, KERN_ERR,
990 "Online defrag not supported with DAX");
991 err = -EOPNOTSUPP;
992 goto mext_out;
993 }
994
995 err = mnt_want_write_file(filp);
996 if (err)
997 goto mext_out;
998
999 err = ext4_move_extents(filp, donor.file, me.orig_start,
1000 me.donor_start, me.len, &me.moved_len);
1001 mnt_drop_write_file(filp);
1002
1003 if (copy_to_user((struct move_extent __user *)arg,
1004 &me, sizeof(me)))
1005 err = -EFAULT;
1006 mext_out:
1007 fdput(donor);
1008 return err;
1009 }
1010
1011 case EXT4_IOC_GROUP_ADD: {
1012 struct ext4_new_group_data input;
1013
1014 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
1015 sizeof(input)))
1016 return -EFAULT;
1017
1018 return ext4_ioctl_group_add(filp, &input);
1019 }
1020
1021 case EXT4_IOC_MIGRATE:
1022 {
1023 int err;
1024 if (!inode_owner_or_capable(inode))
1025 return -EACCES;
1026
1027 err = mnt_want_write_file(filp);
1028 if (err)
1029 return err;
1030 /*
1031 * inode_mutex prevent write and truncate on the file.
1032 * Read still goes through. We take i_data_sem in
1033 * ext4_ext_swap_inode_data before we switch the
1034 * inode format to prevent read.
1035 */
1036 inode_lock((inode));
1037 err = ext4_ext_migrate(inode);
1038 inode_unlock((inode));
1039 mnt_drop_write_file(filp);
1040 return err;
1041 }
1042
1043 case EXT4_IOC_ALLOC_DA_BLKS:
1044 {
1045 int err;
1046 if (!inode_owner_or_capable(inode))
1047 return -EACCES;
1048
1049 err = mnt_want_write_file(filp);
1050 if (err)
1051 return err;
1052 err = ext4_alloc_da_blocks(inode);
1053 mnt_drop_write_file(filp);
1054 return err;
1055 }
1056
1057 case EXT4_IOC_SWAP_BOOT:
1058 {
1059 int err;
1060 if (!(filp->f_mode & FMODE_WRITE))
1061 return -EBADF;
1062 err = mnt_want_write_file(filp);
1063 if (err)
1064 return err;
1065 err = swap_inode_boot_loader(sb, inode);
1066 mnt_drop_write_file(filp);
1067 return err;
1068 }
1069
1070 case EXT4_IOC_RESIZE_FS: {
1071 ext4_fsblk_t n_blocks_count;
1072 int err = 0, err2 = 0;
1073 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
1074
1075 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
1076 sizeof(__u64))) {
1077 return -EFAULT;
1078 }
1079
1080 err = ext4_resize_begin(sb);
1081 if (err)
1082 return err;
1083
1084 err = mnt_want_write_file(filp);
1085 if (err)
1086 goto resizefs_out;
1087
1088 err = ext4_resize_fs(sb, n_blocks_count);
1089 if (EXT4_SB(sb)->s_journal) {
1090 ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE);
1091 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1092 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
1093 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1094 }
1095 if (err == 0)
1096 err = err2;
1097 mnt_drop_write_file(filp);
1098 if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
1099 ext4_has_group_desc_csum(sb) &&
1100 test_opt(sb, INIT_INODE_TABLE))
1101 err = ext4_register_li_request(sb, o_group);
1102
1103 resizefs_out:
1104 ext4_resize_end(sb);
1105 return err;
1106 }
1107
1108 case FITRIM:
1109 {
1110 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1111 struct fstrim_range range;
1112 int ret = 0;
1113
1114 if (!capable(CAP_SYS_ADMIN))
1115 return -EPERM;
1116
1117 if (!blk_queue_discard(q))
1118 return -EOPNOTSUPP;
1119
1120 /*
1121 * We haven't replayed the journal, so we cannot use our
1122 * block-bitmap-guided storage zapping commands.
1123 */
1124 if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
1125 return -EROFS;
1126
1127 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1128 sizeof(range)))
1129 return -EFAULT;
1130
1131 ret = ext4_trim_fs(sb, &range);
1132 if (ret < 0)
1133 return ret;
1134
1135 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1136 sizeof(range)))
1137 return -EFAULT;
1138
1139 return 0;
1140 }
1141 case EXT4_IOC_PRECACHE_EXTENTS:
1142 return ext4_ext_precache(inode);
1143
1144 case FS_IOC_SET_ENCRYPTION_POLICY:
1145 if (!ext4_has_feature_encrypt(sb))
1146 return -EOPNOTSUPP;
1147 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
1148
1149 case FS_IOC_GET_ENCRYPTION_PWSALT: {
1150 #ifdef CONFIG_FS_ENCRYPTION
1151 int err, err2;
1152 struct ext4_sb_info *sbi = EXT4_SB(sb);
1153 handle_t *handle;
1154
1155 if (!ext4_has_feature_encrypt(sb))
1156 return -EOPNOTSUPP;
1157 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
1158 err = mnt_want_write_file(filp);
1159 if (err)
1160 return err;
1161 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
1162 if (IS_ERR(handle)) {
1163 err = PTR_ERR(handle);
1164 goto pwsalt_err_exit;
1165 }
1166 err = ext4_journal_get_write_access(handle, sbi->s_sbh);
1167 if (err)
1168 goto pwsalt_err_journal;
1169 lock_buffer(sbi->s_sbh);
1170 generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
1171 ext4_superblock_csum_set(sb);
1172 unlock_buffer(sbi->s_sbh);
1173 err = ext4_handle_dirty_metadata(handle, NULL,
1174 sbi->s_sbh);
1175 pwsalt_err_journal:
1176 err2 = ext4_journal_stop(handle);
1177 if (err2 && !err)
1178 err = err2;
1179 pwsalt_err_exit:
1180 mnt_drop_write_file(filp);
1181 if (err)
1182 return err;
1183 }
1184 if (copy_to_user((void __user *) arg,
1185 sbi->s_es->s_encrypt_pw_salt, 16))
1186 return -EFAULT;
1187 return 0;
1188 #else
1189 return -EOPNOTSUPP;
1190 #endif
1191 }
1192 case FS_IOC_GET_ENCRYPTION_POLICY:
1193 if (!ext4_has_feature_encrypt(sb))
1194 return -EOPNOTSUPP;
1195 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1196
1197 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1198 if (!ext4_has_feature_encrypt(sb))
1199 return -EOPNOTSUPP;
1200 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1201
1202 case FS_IOC_ADD_ENCRYPTION_KEY:
1203 if (!ext4_has_feature_encrypt(sb))
1204 return -EOPNOTSUPP;
1205 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1206
1207 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1208 if (!ext4_has_feature_encrypt(sb))
1209 return -EOPNOTSUPP;
1210 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1211
1212 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1213 if (!ext4_has_feature_encrypt(sb))
1214 return -EOPNOTSUPP;
1215 return fscrypt_ioctl_remove_key_all_users(filp,
1216 (void __user *)arg);
1217 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1218 if (!ext4_has_feature_encrypt(sb))
1219 return -EOPNOTSUPP;
1220 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1221
1222 case FS_IOC_GET_ENCRYPTION_NONCE:
1223 if (!ext4_has_feature_encrypt(sb))
1224 return -EOPNOTSUPP;
1225 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
1226
1227 case EXT4_IOC_CLEAR_ES_CACHE:
1228 {
1229 if (!inode_owner_or_capable(inode))
1230 return -EACCES;
1231 ext4_clear_inode_es(inode);
1232 return 0;
1233 }
1234
1235 case EXT4_IOC_GETSTATE:
1236 {
1237 __u32 state = 0;
1238
1239 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1240 state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1241 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1242 state |= EXT4_STATE_FLAG_NEW;
1243 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1244 state |= EXT4_STATE_FLAG_NEWENTRY;
1245 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1246 state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1247
1248 return put_user(state, (__u32 __user *) arg);
1249 }
1250
1251 case EXT4_IOC_GET_ES_CACHE:
1252 return ext4_ioctl_get_es_cache(filp, arg);
1253
1254 case FS_IOC_FSGETXATTR:
1255 {
1256 struct fsxattr fa;
1257
1258 ext4_fill_fsxattr(inode, &fa);
1259
1260 if (copy_to_user((struct fsxattr __user *)arg,
1261 &fa, sizeof(fa)))
1262 return -EFAULT;
1263 return 0;
1264 }
1265 case FS_IOC_FSSETXATTR:
1266 {
1267 struct fsxattr fa, old_fa;
1268 int err;
1269
1270 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
1271 sizeof(fa)))
1272 return -EFAULT;
1273
1274 /* Make sure caller has proper permission */
1275 if (!inode_owner_or_capable(inode))
1276 return -EACCES;
1277
1278 if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
1279 return -EOPNOTSUPP;
1280
1281 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
1282 if (ext4_mask_flags(inode->i_mode, flags) != flags)
1283 return -EOPNOTSUPP;
1284
1285 err = mnt_want_write_file(filp);
1286 if (err)
1287 return err;
1288
1289 inode_lock(inode);
1290 ext4_fill_fsxattr(inode, &old_fa);
1291 err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
1292 if (err)
1293 goto out;
1294 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
1295 (flags & EXT4_FL_XFLAG_VISIBLE);
1296 err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags);
1297 if (err)
1298 goto out;
1299 err = ext4_ioctl_setflags(inode, flags);
1300 if (err)
1301 goto out;
1302 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
1303 out:
1304 inode_unlock(inode);
1305 mnt_drop_write_file(filp);
1306 return err;
1307 }
1308 case EXT4_IOC_SHUTDOWN:
1309 return ext4_shutdown(sb, arg);
1310
1311 case FS_IOC_ENABLE_VERITY:
1312 if (!ext4_has_feature_verity(sb))
1313 return -EOPNOTSUPP;
1314 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1315
1316 case FS_IOC_MEASURE_VERITY:
1317 if (!ext4_has_feature_verity(sb))
1318 return -EOPNOTSUPP;
1319 return fsverity_ioctl_measure(filp, (void __user *)arg);
1320
1321 case FS_IOC_READ_VERITY_METADATA:
1322 if (!ext4_has_feature_verity(sb))
1323 return -EOPNOTSUPP;
1324 return fsverity_ioctl_read_metadata(filp,
1325 (const void __user *)arg);
1326
1327 default:
1328 return -ENOTTY;
1329 }
1330 }
1331
ext4_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1332 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1333 {
1334 return __ext4_ioctl(filp, cmd, arg);
1335 }
1336
1337 #ifdef CONFIG_COMPAT
ext4_compat_ioctl(struct file * file,unsigned int cmd,unsigned long arg)1338 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1339 {
1340 /* These are just misnamed, they actually get/put from/to user an int */
1341 switch (cmd) {
1342 case FS_IOC32_GETFLAGS:
1343 cmd = FS_IOC_GETFLAGS;
1344 break;
1345 case FS_IOC32_SETFLAGS:
1346 cmd = FS_IOC_SETFLAGS;
1347 break;
1348 case EXT4_IOC32_GETVERSION:
1349 cmd = EXT4_IOC_GETVERSION;
1350 break;
1351 case EXT4_IOC32_SETVERSION:
1352 cmd = EXT4_IOC_SETVERSION;
1353 break;
1354 case EXT4_IOC32_GROUP_EXTEND:
1355 cmd = EXT4_IOC_GROUP_EXTEND;
1356 break;
1357 case EXT4_IOC32_GETVERSION_OLD:
1358 cmd = EXT4_IOC_GETVERSION_OLD;
1359 break;
1360 case EXT4_IOC32_SETVERSION_OLD:
1361 cmd = EXT4_IOC_SETVERSION_OLD;
1362 break;
1363 case EXT4_IOC32_GETRSVSZ:
1364 cmd = EXT4_IOC_GETRSVSZ;
1365 break;
1366 case EXT4_IOC32_SETRSVSZ:
1367 cmd = EXT4_IOC_SETRSVSZ;
1368 break;
1369 case EXT4_IOC32_GROUP_ADD: {
1370 struct compat_ext4_new_group_input __user *uinput;
1371 struct ext4_new_group_data input;
1372 int err;
1373
1374 uinput = compat_ptr(arg);
1375 err = get_user(input.group, &uinput->group);
1376 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1377 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1378 err |= get_user(input.inode_table, &uinput->inode_table);
1379 err |= get_user(input.blocks_count, &uinput->blocks_count);
1380 err |= get_user(input.reserved_blocks,
1381 &uinput->reserved_blocks);
1382 if (err)
1383 return -EFAULT;
1384 return ext4_ioctl_group_add(file, &input);
1385 }
1386 case EXT4_IOC_MOVE_EXT:
1387 case EXT4_IOC_RESIZE_FS:
1388 case FITRIM:
1389 case EXT4_IOC_PRECACHE_EXTENTS:
1390 case FS_IOC_SET_ENCRYPTION_POLICY:
1391 case FS_IOC_GET_ENCRYPTION_PWSALT:
1392 case FS_IOC_GET_ENCRYPTION_POLICY:
1393 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1394 case FS_IOC_ADD_ENCRYPTION_KEY:
1395 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1396 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1397 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1398 case FS_IOC_GET_ENCRYPTION_NONCE:
1399 case EXT4_IOC_SHUTDOWN:
1400 case FS_IOC_GETFSMAP:
1401 case FS_IOC_ENABLE_VERITY:
1402 case FS_IOC_MEASURE_VERITY:
1403 case FS_IOC_READ_VERITY_METADATA:
1404 case EXT4_IOC_CLEAR_ES_CACHE:
1405 case EXT4_IOC_GETSTATE:
1406 case EXT4_IOC_GET_ES_CACHE:
1407 case FS_IOC_FSGETXATTR:
1408 case FS_IOC_FSSETXATTR:
1409 break;
1410 default:
1411 return -ENOIOCTLCMD;
1412 }
1413 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1414 }
1415 #endif
1416