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, EXT4_IGET_SPECIAL);
125 if (IS_ERR(inode_bl))
126 return PTR_ERR(inode_bl);
127 ei_bl = EXT4_I(inode_bl);
128
129 /* Protect orig inodes against a truncate and make sure,
130 * that only 1 swap_inode_boot_loader is running. */
131 lock_two_nondirectories(inode, inode_bl);
132
133 if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
134 IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
135 (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
136 ext4_has_inline_data(inode)) {
137 err = -EINVAL;
138 goto journal_err_out;
139 }
140
141 if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
142 !inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) {
143 err = -EPERM;
144 goto journal_err_out;
145 }
146
147 down_write(&EXT4_I(inode)->i_mmap_sem);
148 err = filemap_write_and_wait(inode->i_mapping);
149 if (err)
150 goto err_out;
151
152 err = filemap_write_and_wait(inode_bl->i_mapping);
153 if (err)
154 goto err_out;
155
156 /* Wait for all existing dio workers */
157 inode_dio_wait(inode);
158 inode_dio_wait(inode_bl);
159
160 truncate_inode_pages(&inode->i_data, 0);
161 truncate_inode_pages(&inode_bl->i_data, 0);
162
163 handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
164 if (IS_ERR(handle)) {
165 err = -EINVAL;
166 goto err_out;
167 }
168 ext4_fc_start_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT);
169
170 /* Protect extent tree against block allocations via delalloc */
171 ext4_double_down_write_data_sem(inode, inode_bl);
172
173 if (inode_bl->i_nlink == 0) {
174 /* this inode has never been used as a BOOT_LOADER */
175 set_nlink(inode_bl, 1);
176 i_uid_write(inode_bl, 0);
177 i_gid_write(inode_bl, 0);
178 inode_bl->i_flags = 0;
179 ei_bl->i_flags = 0;
180 inode_set_iversion(inode_bl, 1);
181 i_size_write(inode_bl, 0);
182 inode_bl->i_mode = S_IFREG;
183 if (ext4_has_feature_extents(sb)) {
184 ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
185 ext4_ext_tree_init(handle, inode_bl);
186 } else
187 memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
188 }
189
190 err = dquot_initialize(inode);
191 if (err)
192 goto err_out1;
193
194 size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
195 size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
196 diff = size - size_bl;
197 swap_inode_data(inode, inode_bl);
198
199 inode->i_ctime = inode_bl->i_ctime = current_time(inode);
200
201 inode->i_generation = prandom_u32();
202 inode_bl->i_generation = prandom_u32();
203 ext4_reset_inode_seed(inode);
204 ext4_reset_inode_seed(inode_bl);
205
206 ext4_discard_preallocations(inode, 0);
207
208 err = ext4_mark_inode_dirty(handle, inode);
209 if (err < 0) {
210 /* No need to update quota information. */
211 ext4_warning(inode->i_sb,
212 "couldn't mark inode #%lu dirty (err %d)",
213 inode->i_ino, err);
214 /* Revert all changes: */
215 swap_inode_data(inode, inode_bl);
216 ext4_mark_inode_dirty(handle, inode);
217 goto err_out1;
218 }
219
220 blocks = inode_bl->i_blocks;
221 bytes = inode_bl->i_bytes;
222 inode_bl->i_blocks = inode->i_blocks;
223 inode_bl->i_bytes = inode->i_bytes;
224 err = ext4_mark_inode_dirty(handle, inode_bl);
225 if (err < 0) {
226 /* No need to update quota information. */
227 ext4_warning(inode_bl->i_sb,
228 "couldn't mark inode #%lu dirty (err %d)",
229 inode_bl->i_ino, err);
230 goto revert;
231 }
232
233 /* Bootloader inode should not be counted into quota information. */
234 if (diff > 0)
235 dquot_free_space(inode, diff);
236 else
237 err = dquot_alloc_space(inode, -1 * diff);
238
239 if (err < 0) {
240 revert:
241 /* Revert all changes: */
242 inode_bl->i_blocks = blocks;
243 inode_bl->i_bytes = bytes;
244 swap_inode_data(inode, inode_bl);
245 ext4_mark_inode_dirty(handle, inode);
246 ext4_mark_inode_dirty(handle, inode_bl);
247 }
248
249 err_out1:
250 ext4_journal_stop(handle);
251 ext4_fc_stop_ineligible(sb);
252 ext4_double_up_write_data_sem(inode, inode_bl);
253
254 err_out:
255 up_write(&EXT4_I(inode)->i_mmap_sem);
256 journal_err_out:
257 unlock_two_nondirectories(inode, inode_bl);
258 iput(inode_bl);
259 return err;
260 }
261
262 #ifdef CONFIG_FS_ENCRYPTION
uuid_is_zero(__u8 u[16])263 static int uuid_is_zero(__u8 u[16])
264 {
265 int i;
266
267 for (i = 0; i < 16; i++)
268 if (u[i])
269 return 0;
270 return 1;
271 }
272 #endif
273
274 /*
275 * If immutable is set and we are not clearing it, we're not allowed to change
276 * anything else in the inode. Don't error out if we're only trying to set
277 * immutable on an immutable file.
278 */
ext4_ioctl_check_immutable(struct inode * inode,__u32 new_projid,unsigned int flags)279 static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
280 unsigned int flags)
281 {
282 struct ext4_inode_info *ei = EXT4_I(inode);
283 unsigned int oldflags = ei->i_flags;
284
285 if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
286 return 0;
287
288 if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
289 return -EPERM;
290 if (ext4_has_feature_project(inode->i_sb) &&
291 __kprojid_val(ei->i_projid) != new_projid)
292 return -EPERM;
293
294 return 0;
295 }
296
ext4_dax_dontcache(struct inode * inode,unsigned int flags)297 static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
298 {
299 struct ext4_inode_info *ei = EXT4_I(inode);
300
301 if (S_ISDIR(inode->i_mode))
302 return;
303
304 if (test_opt2(inode->i_sb, DAX_NEVER) ||
305 test_opt(inode->i_sb, DAX_ALWAYS))
306 return;
307
308 if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
309 d_mark_dontcache(inode);
310 }
311
dax_compatible(struct inode * inode,unsigned int oldflags,unsigned int flags)312 static bool dax_compatible(struct inode *inode, unsigned int oldflags,
313 unsigned int flags)
314 {
315 if (flags & EXT4_DAX_FL) {
316 if ((oldflags & EXT4_DAX_MUT_EXCL) ||
317 ext4_test_inode_state(inode,
318 EXT4_STATE_VERITY_IN_PROGRESS)) {
319 return false;
320 }
321 }
322
323 if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
324 return false;
325
326 return true;
327 }
328
ext4_ioctl_setflags(struct inode * inode,unsigned int flags)329 static int ext4_ioctl_setflags(struct inode *inode,
330 unsigned int flags)
331 {
332 struct ext4_inode_info *ei = EXT4_I(inode);
333 handle_t *handle = NULL;
334 int err = -EPERM, migrate = 0;
335 struct ext4_iloc iloc;
336 unsigned int oldflags, mask, i;
337 struct super_block *sb = inode->i_sb;
338
339 /* Is it quota file? Do not allow user to mess with it */
340 if (ext4_is_quota_file(inode))
341 goto flags_out;
342
343 oldflags = ei->i_flags;
344
345 err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
346 if (err)
347 goto flags_out;
348
349 /*
350 * The JOURNAL_DATA flag can only be changed by
351 * the relevant capability.
352 */
353 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
354 if (!capable(CAP_SYS_RESOURCE))
355 goto flags_out;
356 }
357
358 if (!dax_compatible(inode, oldflags, flags)) {
359 err = -EOPNOTSUPP;
360 goto flags_out;
361 }
362
363 if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
364 migrate = 1;
365
366 if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
367 if (!ext4_has_feature_casefold(sb)) {
368 err = -EOPNOTSUPP;
369 goto flags_out;
370 }
371
372 if (!S_ISDIR(inode->i_mode)) {
373 err = -ENOTDIR;
374 goto flags_out;
375 }
376
377 if (!ext4_empty_dir(inode)) {
378 err = -ENOTEMPTY;
379 goto flags_out;
380 }
381 }
382
383 /*
384 * Wait for all pending directio and then flush all the dirty pages
385 * for this file. The flush marks all the pages readonly, so any
386 * subsequent attempt to write to the file (particularly mmap pages)
387 * will come through the filesystem and fail.
388 */
389 if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
390 (flags & EXT4_IMMUTABLE_FL)) {
391 inode_dio_wait(inode);
392 err = filemap_write_and_wait(inode->i_mapping);
393 if (err)
394 goto flags_out;
395 }
396
397 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
398 if (IS_ERR(handle)) {
399 err = PTR_ERR(handle);
400 goto flags_out;
401 }
402 if (IS_SYNC(inode))
403 ext4_handle_sync(handle);
404 err = ext4_reserve_inode_write(handle, inode, &iloc);
405 if (err)
406 goto flags_err;
407
408 ext4_dax_dontcache(inode, flags);
409
410 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
411 if (!(mask & EXT4_FL_USER_MODIFIABLE))
412 continue;
413 /* These flags get special treatment later */
414 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
415 continue;
416 if (mask & flags)
417 ext4_set_inode_flag(inode, i);
418 else
419 ext4_clear_inode_flag(inode, i);
420 }
421
422 ext4_set_inode_flags(inode, false);
423
424 inode->i_ctime = current_time(inode);
425
426 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
427 flags_err:
428 ext4_journal_stop(handle);
429 if (err)
430 goto flags_out;
431
432 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
433 /*
434 * Changes to the journaling mode can cause unsafe changes to
435 * S_DAX if the inode is DAX
436 */
437 if (IS_DAX(inode)) {
438 err = -EBUSY;
439 goto flags_out;
440 }
441
442 err = ext4_change_inode_journal_flag(inode,
443 flags & EXT4_JOURNAL_DATA_FL);
444 if (err)
445 goto flags_out;
446 }
447 if (migrate) {
448 if (flags & EXT4_EXTENTS_FL)
449 err = ext4_ext_migrate(inode);
450 else
451 err = ext4_ind_migrate(inode);
452 }
453
454 flags_out:
455 return err;
456 }
457
458 #ifdef CONFIG_QUOTA
ext4_ioctl_setproject(struct file * filp,__u32 projid)459 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
460 {
461 struct inode *inode = file_inode(filp);
462 struct super_block *sb = inode->i_sb;
463 struct ext4_inode_info *ei = EXT4_I(inode);
464 int err, rc;
465 handle_t *handle;
466 kprojid_t kprojid;
467 struct ext4_iloc iloc;
468 struct ext4_inode *raw_inode;
469 struct dquot *transfer_to[MAXQUOTAS] = { };
470
471 if (!ext4_has_feature_project(sb)) {
472 if (projid != EXT4_DEF_PROJID)
473 return -EOPNOTSUPP;
474 else
475 return 0;
476 }
477
478 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
479 return -EOPNOTSUPP;
480
481 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
482
483 if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
484 return 0;
485
486 err = -EPERM;
487 /* Is it quota file? Do not allow user to mess with it */
488 if (ext4_is_quota_file(inode))
489 return err;
490
491 err = ext4_get_inode_loc(inode, &iloc);
492 if (err)
493 return err;
494
495 raw_inode = ext4_raw_inode(&iloc);
496 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
497 err = ext4_expand_extra_isize(inode,
498 EXT4_SB(sb)->s_want_extra_isize,
499 &iloc);
500 if (err)
501 return err;
502 } else {
503 brelse(iloc.bh);
504 }
505
506 err = dquot_initialize(inode);
507 if (err)
508 return err;
509
510 handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
511 EXT4_QUOTA_INIT_BLOCKS(sb) +
512 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
513 if (IS_ERR(handle))
514 return PTR_ERR(handle);
515
516 err = ext4_reserve_inode_write(handle, inode, &iloc);
517 if (err)
518 goto out_stop;
519
520 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
521 if (!IS_ERR(transfer_to[PRJQUOTA])) {
522
523 /* __dquot_transfer() calls back ext4_get_inode_usage() which
524 * counts xattr inode references.
525 */
526 down_read(&EXT4_I(inode)->xattr_sem);
527 err = __dquot_transfer(inode, transfer_to);
528 up_read(&EXT4_I(inode)->xattr_sem);
529 dqput(transfer_to[PRJQUOTA]);
530 if (err)
531 goto out_dirty;
532 }
533
534 EXT4_I(inode)->i_projid = kprojid;
535 inode->i_ctime = current_time(inode);
536 out_dirty:
537 rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
538 if (!err)
539 err = rc;
540 out_stop:
541 ext4_journal_stop(handle);
542 return err;
543 }
544 #else
ext4_ioctl_setproject(struct file * filp,__u32 projid)545 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
546 {
547 if (projid != EXT4_DEF_PROJID)
548 return -EOPNOTSUPP;
549 return 0;
550 }
551 #endif
552
553 /* Transfer internal flags to xflags */
ext4_iflags_to_xflags(unsigned long iflags)554 static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
555 {
556 __u32 xflags = 0;
557
558 if (iflags & EXT4_SYNC_FL)
559 xflags |= FS_XFLAG_SYNC;
560 if (iflags & EXT4_IMMUTABLE_FL)
561 xflags |= FS_XFLAG_IMMUTABLE;
562 if (iflags & EXT4_APPEND_FL)
563 xflags |= FS_XFLAG_APPEND;
564 if (iflags & EXT4_NODUMP_FL)
565 xflags |= FS_XFLAG_NODUMP;
566 if (iflags & EXT4_NOATIME_FL)
567 xflags |= FS_XFLAG_NOATIME;
568 if (iflags & EXT4_PROJINHERIT_FL)
569 xflags |= FS_XFLAG_PROJINHERIT;
570 if (iflags & EXT4_DAX_FL)
571 xflags |= FS_XFLAG_DAX;
572 return xflags;
573 }
574
575 #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
576 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
577 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT | \
578 FS_XFLAG_DAX)
579
580 /* Transfer xflags flags to internal */
ext4_xflags_to_iflags(__u32 xflags)581 static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
582 {
583 unsigned long iflags = 0;
584
585 if (xflags & FS_XFLAG_SYNC)
586 iflags |= EXT4_SYNC_FL;
587 if (xflags & FS_XFLAG_IMMUTABLE)
588 iflags |= EXT4_IMMUTABLE_FL;
589 if (xflags & FS_XFLAG_APPEND)
590 iflags |= EXT4_APPEND_FL;
591 if (xflags & FS_XFLAG_NODUMP)
592 iflags |= EXT4_NODUMP_FL;
593 if (xflags & FS_XFLAG_NOATIME)
594 iflags |= EXT4_NOATIME_FL;
595 if (xflags & FS_XFLAG_PROJINHERIT)
596 iflags |= EXT4_PROJINHERIT_FL;
597 if (xflags & FS_XFLAG_DAX)
598 iflags |= EXT4_DAX_FL;
599
600 return iflags;
601 }
602
ext4_shutdown(struct super_block * sb,unsigned long arg)603 static int ext4_shutdown(struct super_block *sb, unsigned long arg)
604 {
605 struct ext4_sb_info *sbi = EXT4_SB(sb);
606 __u32 flags;
607
608 if (!capable(CAP_SYS_ADMIN))
609 return -EPERM;
610
611 if (get_user(flags, (__u32 __user *)arg))
612 return -EFAULT;
613
614 if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
615 return -EINVAL;
616
617 if (ext4_forced_shutdown(sbi))
618 return 0;
619
620 ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
621 trace_ext4_shutdown(sb, flags);
622
623 switch (flags) {
624 case EXT4_GOING_FLAGS_DEFAULT:
625 freeze_bdev(sb->s_bdev);
626 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
627 thaw_bdev(sb->s_bdev, sb);
628 break;
629 case EXT4_GOING_FLAGS_LOGFLUSH:
630 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
631 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
632 (void) ext4_force_commit(sb);
633 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
634 }
635 break;
636 case EXT4_GOING_FLAGS_NOLOGFLUSH:
637 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
638 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
639 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
640 break;
641 default:
642 return -EINVAL;
643 }
644 clear_opt(sb, DISCARD);
645 return 0;
646 }
647
648 struct getfsmap_info {
649 struct super_block *gi_sb;
650 struct fsmap_head __user *gi_data;
651 unsigned int gi_idx;
652 __u32 gi_last_flags;
653 };
654
ext4_getfsmap_format(struct ext4_fsmap * xfm,void * priv)655 static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
656 {
657 struct getfsmap_info *info = priv;
658 struct fsmap fm;
659
660 trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
661
662 info->gi_last_flags = xfm->fmr_flags;
663 ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
664 if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
665 sizeof(struct fsmap)))
666 return -EFAULT;
667
668 return 0;
669 }
670
ext4_ioc_getfsmap(struct super_block * sb,struct fsmap_head __user * arg)671 static int ext4_ioc_getfsmap(struct super_block *sb,
672 struct fsmap_head __user *arg)
673 {
674 struct getfsmap_info info = { NULL };
675 struct ext4_fsmap_head xhead = {0};
676 struct fsmap_head head;
677 bool aborted = false;
678 int error;
679
680 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
681 return -EFAULT;
682 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
683 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
684 sizeof(head.fmh_keys[0].fmr_reserved)) ||
685 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
686 sizeof(head.fmh_keys[1].fmr_reserved)))
687 return -EINVAL;
688 /*
689 * ext4 doesn't report file extents at all, so the only valid
690 * file offsets are the magic ones (all zeroes or all ones).
691 */
692 if (head.fmh_keys[0].fmr_offset ||
693 (head.fmh_keys[1].fmr_offset != 0 &&
694 head.fmh_keys[1].fmr_offset != -1ULL))
695 return -EINVAL;
696
697 xhead.fmh_iflags = head.fmh_iflags;
698 xhead.fmh_count = head.fmh_count;
699 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
700 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
701
702 trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
703 trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
704
705 info.gi_sb = sb;
706 info.gi_data = arg;
707 error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
708 if (error == EXT4_QUERY_RANGE_ABORT) {
709 error = 0;
710 aborted = true;
711 } else if (error)
712 return error;
713
714 /* If we didn't abort, set the "last" flag in the last fmx */
715 if (!aborted && info.gi_idx) {
716 info.gi_last_flags |= FMR_OF_LAST;
717 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
718 &info.gi_last_flags,
719 sizeof(info.gi_last_flags)))
720 return -EFAULT;
721 }
722
723 /* copy back header */
724 head.fmh_entries = xhead.fmh_entries;
725 head.fmh_oflags = xhead.fmh_oflags;
726 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
727 return -EFAULT;
728
729 return 0;
730 }
731
ext4_ioctl_group_add(struct file * file,struct ext4_new_group_data * input)732 static long ext4_ioctl_group_add(struct file *file,
733 struct ext4_new_group_data *input)
734 {
735 struct super_block *sb = file_inode(file)->i_sb;
736 int err, err2=0;
737
738 err = ext4_resize_begin(sb);
739 if (err)
740 return err;
741
742 if (ext4_has_feature_bigalloc(sb)) {
743 ext4_msg(sb, KERN_ERR,
744 "Online resizing not supported with bigalloc");
745 err = -EOPNOTSUPP;
746 goto group_add_out;
747 }
748
749 err = mnt_want_write_file(file);
750 if (err)
751 goto group_add_out;
752
753 err = ext4_group_add(sb, input);
754 if (EXT4_SB(sb)->s_journal) {
755 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
756 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
757 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
758 }
759 if (err == 0)
760 err = err2;
761 mnt_drop_write_file(file);
762 if (!err && ext4_has_group_desc_csum(sb) &&
763 test_opt(sb, INIT_INODE_TABLE))
764 err = ext4_register_li_request(sb, input->group);
765 group_add_out:
766 ext4_resize_end(sb);
767 return err;
768 }
769
ext4_fill_fsxattr(struct inode * inode,struct fsxattr * fa)770 static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
771 {
772 struct ext4_inode_info *ei = EXT4_I(inode);
773
774 simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags &
775 EXT4_FL_USER_VISIBLE));
776
777 if (ext4_has_feature_project(inode->i_sb))
778 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
779 }
780
781 /* So that the fiemap access checks can't overflow on 32 bit machines. */
782 #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
783
ext4_ioctl_get_es_cache(struct file * filp,unsigned long arg)784 static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
785 {
786 struct fiemap fiemap;
787 struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
788 struct fiemap_extent_info fieinfo = { 0, };
789 struct inode *inode = file_inode(filp);
790 int error;
791
792 if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
793 return -EFAULT;
794
795 if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
796 return -EINVAL;
797
798 fieinfo.fi_flags = fiemap.fm_flags;
799 fieinfo.fi_extents_max = fiemap.fm_extent_count;
800 fieinfo.fi_extents_start = ufiemap->fm_extents;
801
802 error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
803 fiemap.fm_length);
804 fiemap.fm_flags = fieinfo.fi_flags;
805 fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
806 if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
807 error = -EFAULT;
808
809 return error;
810 }
811
__ext4_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)812 static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
813 {
814 struct inode *inode = file_inode(filp);
815 struct super_block *sb = inode->i_sb;
816 struct ext4_inode_info *ei = EXT4_I(inode);
817 unsigned int flags;
818
819 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
820
821 switch (cmd) {
822 case FS_IOC_GETFSMAP:
823 return ext4_ioc_getfsmap(sb, (void __user *)arg);
824 case FS_IOC_GETFLAGS:
825 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
826 if (S_ISREG(inode->i_mode))
827 flags &= ~EXT4_PROJINHERIT_FL;
828 return put_user(flags, (int __user *) arg);
829 case FS_IOC_SETFLAGS: {
830 int err;
831
832 if (!inode_owner_or_capable(inode))
833 return -EACCES;
834
835 if (get_user(flags, (int __user *) arg))
836 return -EFAULT;
837
838 if (flags & ~EXT4_FL_USER_VISIBLE)
839 return -EOPNOTSUPP;
840 /*
841 * chattr(1) grabs flags via GETFLAGS, modifies the result and
842 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
843 * more restrictive than just silently masking off visible but
844 * not settable flags as we always did.
845 */
846 flags &= EXT4_FL_USER_MODIFIABLE;
847 if (ext4_mask_flags(inode->i_mode, flags) != flags)
848 return -EOPNOTSUPP;
849
850 err = mnt_want_write_file(filp);
851 if (err)
852 return err;
853
854 inode_lock(inode);
855 err = ext4_ioctl_check_immutable(inode,
856 from_kprojid(&init_user_ns, ei->i_projid),
857 flags);
858 if (!err)
859 err = ext4_ioctl_setflags(inode, flags);
860 inode_unlock(inode);
861 mnt_drop_write_file(filp);
862 return err;
863 }
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(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);
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(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(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, 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);
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, sbi->s_sbh);
1158 if (err)
1159 goto pwsalt_err_journal;
1160 generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
1161 err = ext4_handle_dirty_metadata(handle, NULL,
1162 sbi->s_sbh);
1163 pwsalt_err_journal:
1164 err2 = ext4_journal_stop(handle);
1165 if (err2 && !err)
1166 err = err2;
1167 pwsalt_err_exit:
1168 mnt_drop_write_file(filp);
1169 if (err)
1170 return err;
1171 }
1172 if (copy_to_user((void __user *) arg,
1173 sbi->s_es->s_encrypt_pw_salt, 16))
1174 return -EFAULT;
1175 return 0;
1176 #else
1177 return -EOPNOTSUPP;
1178 #endif
1179 }
1180 case FS_IOC_GET_ENCRYPTION_POLICY:
1181 if (!ext4_has_feature_encrypt(sb))
1182 return -EOPNOTSUPP;
1183 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1184
1185 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1186 if (!ext4_has_feature_encrypt(sb))
1187 return -EOPNOTSUPP;
1188 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1189
1190 case FS_IOC_ADD_ENCRYPTION_KEY:
1191 if (!ext4_has_feature_encrypt(sb))
1192 return -EOPNOTSUPP;
1193 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1194
1195 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1196 if (!ext4_has_feature_encrypt(sb))
1197 return -EOPNOTSUPP;
1198 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1199
1200 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1201 if (!ext4_has_feature_encrypt(sb))
1202 return -EOPNOTSUPP;
1203 return fscrypt_ioctl_remove_key_all_users(filp,
1204 (void __user *)arg);
1205 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1206 if (!ext4_has_feature_encrypt(sb))
1207 return -EOPNOTSUPP;
1208 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1209
1210 case FS_IOC_GET_ENCRYPTION_NONCE:
1211 if (!ext4_has_feature_encrypt(sb))
1212 return -EOPNOTSUPP;
1213 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
1214
1215 case EXT4_IOC_CLEAR_ES_CACHE:
1216 {
1217 if (!inode_owner_or_capable(inode))
1218 return -EACCES;
1219 ext4_clear_inode_es(inode);
1220 return 0;
1221 }
1222
1223 case EXT4_IOC_GETSTATE:
1224 {
1225 __u32 state = 0;
1226
1227 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1228 state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1229 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1230 state |= EXT4_STATE_FLAG_NEW;
1231 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1232 state |= EXT4_STATE_FLAG_NEWENTRY;
1233 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1234 state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1235
1236 return put_user(state, (__u32 __user *) arg);
1237 }
1238
1239 case EXT4_IOC_GET_ES_CACHE:
1240 return ext4_ioctl_get_es_cache(filp, arg);
1241
1242 case FS_IOC_FSGETXATTR:
1243 {
1244 struct fsxattr fa;
1245
1246 ext4_fill_fsxattr(inode, &fa);
1247
1248 if (copy_to_user((struct fsxattr __user *)arg,
1249 &fa, sizeof(fa)))
1250 return -EFAULT;
1251 return 0;
1252 }
1253 case FS_IOC_FSSETXATTR:
1254 {
1255 struct fsxattr fa, old_fa;
1256 int err;
1257
1258 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
1259 sizeof(fa)))
1260 return -EFAULT;
1261
1262 /* Make sure caller has proper permission */
1263 if (!inode_owner_or_capable(inode))
1264 return -EACCES;
1265
1266 if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
1267 return -EOPNOTSUPP;
1268
1269 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
1270 if (ext4_mask_flags(inode->i_mode, flags) != flags)
1271 return -EOPNOTSUPP;
1272
1273 err = mnt_want_write_file(filp);
1274 if (err)
1275 return err;
1276
1277 inode_lock(inode);
1278 ext4_fill_fsxattr(inode, &old_fa);
1279 err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
1280 if (err)
1281 goto out;
1282 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
1283 (flags & EXT4_FL_XFLAG_VISIBLE);
1284 err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags);
1285 if (err)
1286 goto out;
1287 err = ext4_ioctl_setflags(inode, flags);
1288 if (err)
1289 goto out;
1290 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
1291 out:
1292 inode_unlock(inode);
1293 mnt_drop_write_file(filp);
1294 return err;
1295 }
1296 case EXT4_IOC_SHUTDOWN:
1297 return ext4_shutdown(sb, arg);
1298
1299 case FS_IOC_ENABLE_VERITY:
1300 if (!ext4_has_feature_verity(sb))
1301 return -EOPNOTSUPP;
1302 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1303
1304 case FS_IOC_MEASURE_VERITY:
1305 if (!ext4_has_feature_verity(sb))
1306 return -EOPNOTSUPP;
1307 return fsverity_ioctl_measure(filp, (void __user *)arg);
1308
1309 default:
1310 return -ENOTTY;
1311 }
1312 }
1313
ext4_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1314 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1315 {
1316 long ret;
1317
1318 ext4_fc_start_update(file_inode(filp));
1319 ret = __ext4_ioctl(filp, cmd, arg);
1320 ext4_fc_stop_update(file_inode(filp));
1321
1322 return ret;
1323 }
1324
1325 #ifdef CONFIG_COMPAT
ext4_compat_ioctl(struct file * file,unsigned int cmd,unsigned long arg)1326 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1327 {
1328 /* These are just misnamed, they actually get/put from/to user an int */
1329 switch (cmd) {
1330 case FS_IOC32_GETFLAGS:
1331 cmd = FS_IOC_GETFLAGS;
1332 break;
1333 case FS_IOC32_SETFLAGS:
1334 cmd = FS_IOC_SETFLAGS;
1335 break;
1336 case EXT4_IOC32_GETVERSION:
1337 cmd = EXT4_IOC_GETVERSION;
1338 break;
1339 case EXT4_IOC32_SETVERSION:
1340 cmd = EXT4_IOC_SETVERSION;
1341 break;
1342 case EXT4_IOC32_GROUP_EXTEND:
1343 cmd = EXT4_IOC_GROUP_EXTEND;
1344 break;
1345 case EXT4_IOC32_GETVERSION_OLD:
1346 cmd = EXT4_IOC_GETVERSION_OLD;
1347 break;
1348 case EXT4_IOC32_SETVERSION_OLD:
1349 cmd = EXT4_IOC_SETVERSION_OLD;
1350 break;
1351 case EXT4_IOC32_GETRSVSZ:
1352 cmd = EXT4_IOC_GETRSVSZ;
1353 break;
1354 case EXT4_IOC32_SETRSVSZ:
1355 cmd = EXT4_IOC_SETRSVSZ;
1356 break;
1357 case EXT4_IOC32_GROUP_ADD: {
1358 struct compat_ext4_new_group_input __user *uinput;
1359 struct ext4_new_group_data input;
1360 int err;
1361
1362 uinput = compat_ptr(arg);
1363 err = get_user(input.group, &uinput->group);
1364 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1365 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1366 err |= get_user(input.inode_table, &uinput->inode_table);
1367 err |= get_user(input.blocks_count, &uinput->blocks_count);
1368 err |= get_user(input.reserved_blocks,
1369 &uinput->reserved_blocks);
1370 if (err)
1371 return -EFAULT;
1372 return ext4_ioctl_group_add(file, &input);
1373 }
1374 case EXT4_IOC_MOVE_EXT:
1375 case EXT4_IOC_RESIZE_FS:
1376 case FITRIM:
1377 case EXT4_IOC_PRECACHE_EXTENTS:
1378 case FS_IOC_SET_ENCRYPTION_POLICY:
1379 case FS_IOC_GET_ENCRYPTION_PWSALT:
1380 case FS_IOC_GET_ENCRYPTION_POLICY:
1381 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1382 case FS_IOC_ADD_ENCRYPTION_KEY:
1383 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1384 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1385 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1386 case FS_IOC_GET_ENCRYPTION_NONCE:
1387 case EXT4_IOC_SHUTDOWN:
1388 case FS_IOC_GETFSMAP:
1389 case FS_IOC_ENABLE_VERITY:
1390 case FS_IOC_MEASURE_VERITY:
1391 case EXT4_IOC_CLEAR_ES_CACHE:
1392 case EXT4_IOC_GETSTATE:
1393 case EXT4_IOC_GET_ES_CACHE:
1394 case FS_IOC_FSGETXATTR:
1395 case FS_IOC_FSSETXATTR:
1396 break;
1397 default:
1398 return -ENOIOCTLCMD;
1399 }
1400 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1401 }
1402 #endif
1403