1
2
3
4
5
6
7
8
9
10#include <linux/fs.h>
11#include <linux/capability.h>
12#include <linux/time.h>
13#include <linux/compat.h>
14#include <linux/mount.h>
15#include <linux/file.h>
16#include <linux/quotaops.h>
17#include <linux/uuid.h>
18#include <linux/uaccess.h>
19#include <linux/delay.h>
20#include "ext4_jbd2.h"
21#include "ext4.h"
22#include <linux/fsmap.h>
23#include "fsmap.h"
24#include <trace/events/ext4.h>
25
26
27
28
29
30
31
32
33
34static void memswap(void *a, void *b, size_t len)
35{
36 unsigned char *ap, *bp;
37
38 ap = (unsigned char *)a;
39 bp = (unsigned char *)b;
40 while (len-- > 0) {
41 swap(*ap, *bp);
42 ap++;
43 bp++;
44 }
45}
46
47
48
49
50
51
52
53
54
55
56
57
58static void swap_inode_data(struct inode *inode1, struct inode *inode2)
59{
60 loff_t isize;
61 struct ext4_inode_info *ei1;
62 struct ext4_inode_info *ei2;
63
64 ei1 = EXT4_I(inode1);
65 ei2 = EXT4_I(inode2);
66
67 swap(inode1->i_flags, inode2->i_flags);
68 swap(inode1->i_version, inode2->i_version);
69 swap(inode1->i_blocks, inode2->i_blocks);
70 swap(inode1->i_bytes, inode2->i_bytes);
71 swap(inode1->i_atime, inode2->i_atime);
72 swap(inode1->i_mtime, inode2->i_mtime);
73
74 memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
75 swap(ei1->i_flags, ei2->i_flags);
76 swap(ei1->i_disksize, ei2->i_disksize);
77 ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
78 ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
79
80 isize = i_size_read(inode1);
81 i_size_write(inode1, i_size_read(inode2));
82 i_size_write(inode2, isize);
83}
84
85
86
87
88
89
90
91
92
93
94static long swap_inode_boot_loader(struct super_block *sb,
95 struct inode *inode)
96{
97 handle_t *handle;
98 int err;
99 struct inode *inode_bl;
100 struct ext4_inode_info *ei_bl;
101 struct ext4_sb_info *sbi = EXT4_SB(sb);
102
103 if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode))
104 return -EINVAL;
105
106 if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN))
107 return -EPERM;
108
109 inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO);
110 if (IS_ERR(inode_bl))
111 return PTR_ERR(inode_bl);
112 ei_bl = EXT4_I(inode_bl);
113
114 filemap_flush(inode->i_mapping);
115 filemap_flush(inode_bl->i_mapping);
116
117
118
119 lock_two_nondirectories(inode, inode_bl);
120
121 truncate_inode_pages(&inode->i_data, 0);
122 truncate_inode_pages(&inode_bl->i_data, 0);
123
124
125 ext4_inode_block_unlocked_dio(inode);
126 ext4_inode_block_unlocked_dio(inode_bl);
127 inode_dio_wait(inode);
128 inode_dio_wait(inode_bl);
129
130 handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
131 if (IS_ERR(handle)) {
132 err = -EINVAL;
133 goto journal_err_out;
134 }
135
136
137 ext4_double_down_write_data_sem(inode, inode_bl);
138
139 if (inode_bl->i_nlink == 0) {
140
141 set_nlink(inode_bl, 1);
142 i_uid_write(inode_bl, 0);
143 i_gid_write(inode_bl, 0);
144 inode_bl->i_flags = 0;
145 ei_bl->i_flags = 0;
146 inode_bl->i_version = 1;
147 i_size_write(inode_bl, 0);
148 inode_bl->i_mode = S_IFREG;
149 if (ext4_has_feature_extents(sb)) {
150 ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
151 ext4_ext_tree_init(handle, inode_bl);
152 } else
153 memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
154 }
155
156 swap_inode_data(inode, inode_bl);
157
158 inode->i_ctime = inode_bl->i_ctime = current_time(inode);
159
160 spin_lock(&sbi->s_next_gen_lock);
161 inode->i_generation = sbi->s_next_generation++;
162 inode_bl->i_generation = sbi->s_next_generation++;
163 spin_unlock(&sbi->s_next_gen_lock);
164
165 ext4_discard_preallocations(inode);
166
167 err = ext4_mark_inode_dirty(handle, inode);
168 if (err < 0) {
169 ext4_warning(inode->i_sb,
170 "couldn't mark inode #%lu dirty (err %d)",
171 inode->i_ino, err);
172
173 swap_inode_data(inode, inode_bl);
174 } else {
175 err = ext4_mark_inode_dirty(handle, inode_bl);
176 if (err < 0) {
177 ext4_warning(inode_bl->i_sb,
178 "couldn't mark inode #%lu dirty (err %d)",
179 inode_bl->i_ino, err);
180
181 swap_inode_data(inode, inode_bl);
182 ext4_mark_inode_dirty(handle, inode);
183 }
184 }
185 ext4_journal_stop(handle);
186 ext4_double_up_write_data_sem(inode, inode_bl);
187
188journal_err_out:
189 ext4_inode_resume_unlocked_dio(inode);
190 ext4_inode_resume_unlocked_dio(inode_bl);
191 unlock_two_nondirectories(inode, inode_bl);
192 iput(inode_bl);
193 return err;
194}
195
196#ifdef CONFIG_EXT4_FS_ENCRYPTION
197static int uuid_is_zero(__u8 u[16])
198{
199 int i;
200
201 for (i = 0; i < 16; i++)
202 if (u[i])
203 return 0;
204 return 1;
205}
206#endif
207
208static int ext4_ioctl_setflags(struct inode *inode,
209 unsigned int flags)
210{
211 struct ext4_inode_info *ei = EXT4_I(inode);
212 handle_t *handle = NULL;
213 int err = -EPERM, migrate = 0;
214 struct ext4_iloc iloc;
215 unsigned int oldflags, mask, i;
216 unsigned int jflag;
217
218
219 if (ext4_is_quota_file(inode))
220 goto flags_out;
221
222 oldflags = ei->i_flags;
223
224
225 jflag = flags & EXT4_JOURNAL_DATA_FL;
226
227
228
229
230
231
232
233 if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
234 if (!capable(CAP_LINUX_IMMUTABLE))
235 goto flags_out;
236 }
237
238
239
240
241
242 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
243 if (!capable(CAP_SYS_RESOURCE))
244 goto flags_out;
245 }
246 if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
247 migrate = 1;
248
249 if (flags & EXT4_EOFBLOCKS_FL) {
250
251 if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
252 err = -EOPNOTSUPP;
253 goto flags_out;
254 }
255 } else if (oldflags & EXT4_EOFBLOCKS_FL) {
256 err = ext4_truncate(inode);
257 if (err)
258 goto flags_out;
259 }
260
261 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
262 if (IS_ERR(handle)) {
263 err = PTR_ERR(handle);
264 goto flags_out;
265 }
266 if (IS_SYNC(inode))
267 ext4_handle_sync(handle);
268 err = ext4_reserve_inode_write(handle, inode, &iloc);
269 if (err)
270 goto flags_err;
271
272 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
273 if (!(mask & EXT4_FL_USER_MODIFIABLE))
274 continue;
275
276 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
277 continue;
278 if (mask & flags)
279 ext4_set_inode_flag(inode, i);
280 else
281 ext4_clear_inode_flag(inode, i);
282 }
283
284 ext4_set_inode_flags(inode);
285 inode->i_ctime = current_time(inode);
286
287 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
288flags_err:
289 ext4_journal_stop(handle);
290 if (err)
291 goto flags_out;
292
293 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
294 err = ext4_change_inode_journal_flag(inode, jflag);
295 if (err)
296 goto flags_out;
297 if (migrate) {
298 if (flags & EXT4_EXTENTS_FL)
299 err = ext4_ext_migrate(inode);
300 else
301 err = ext4_ind_migrate(inode);
302 }
303
304flags_out:
305 return err;
306}
307
308#ifdef CONFIG_QUOTA
309static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
310{
311 struct inode *inode = file_inode(filp);
312 struct super_block *sb = inode->i_sb;
313 struct ext4_inode_info *ei = EXT4_I(inode);
314 int err, rc;
315 handle_t *handle;
316 kprojid_t kprojid;
317 struct ext4_iloc iloc;
318 struct ext4_inode *raw_inode;
319 struct dquot *transfer_to[MAXQUOTAS] = { };
320
321 if (!ext4_has_feature_project(sb)) {
322 if (projid != EXT4_DEF_PROJID)
323 return -EOPNOTSUPP;
324 else
325 return 0;
326 }
327
328 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
329 return -EOPNOTSUPP;
330
331 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
332
333 if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
334 return 0;
335
336 err = mnt_want_write_file(filp);
337 if (err)
338 return err;
339
340 err = -EPERM;
341 inode_lock(inode);
342
343 if (ext4_is_quota_file(inode))
344 goto out_unlock;
345
346 err = ext4_get_inode_loc(inode, &iloc);
347 if (err)
348 goto out_unlock;
349
350 raw_inode = ext4_raw_inode(&iloc);
351 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
352 err = ext4_expand_extra_isize(inode,
353 EXT4_SB(sb)->s_want_extra_isize,
354 &iloc);
355 if (err)
356 goto out_unlock;
357 } else {
358 brelse(iloc.bh);
359 }
360
361 dquot_initialize(inode);
362
363 handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
364 EXT4_QUOTA_INIT_BLOCKS(sb) +
365 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
366 if (IS_ERR(handle)) {
367 err = PTR_ERR(handle);
368 goto out_unlock;
369 }
370
371 err = ext4_reserve_inode_write(handle, inode, &iloc);
372 if (err)
373 goto out_stop;
374
375 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
376 if (!IS_ERR(transfer_to[PRJQUOTA])) {
377
378
379
380
381 down_read(&EXT4_I(inode)->xattr_sem);
382 err = __dquot_transfer(inode, transfer_to);
383 up_read(&EXT4_I(inode)->xattr_sem);
384 dqput(transfer_to[PRJQUOTA]);
385 if (err)
386 goto out_dirty;
387 }
388
389 EXT4_I(inode)->i_projid = kprojid;
390 inode->i_ctime = current_time(inode);
391out_dirty:
392 rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
393 if (!err)
394 err = rc;
395out_stop:
396 ext4_journal_stop(handle);
397out_unlock:
398 inode_unlock(inode);
399 mnt_drop_write_file(filp);
400 return err;
401}
402#else
403static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
404{
405 if (projid != EXT4_DEF_PROJID)
406 return -EOPNOTSUPP;
407 return 0;
408}
409#endif
410
411
412static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
413{
414 __u32 xflags = 0;
415
416 if (iflags & EXT4_SYNC_FL)
417 xflags |= FS_XFLAG_SYNC;
418 if (iflags & EXT4_IMMUTABLE_FL)
419 xflags |= FS_XFLAG_IMMUTABLE;
420 if (iflags & EXT4_APPEND_FL)
421 xflags |= FS_XFLAG_APPEND;
422 if (iflags & EXT4_NODUMP_FL)
423 xflags |= FS_XFLAG_NODUMP;
424 if (iflags & EXT4_NOATIME_FL)
425 xflags |= FS_XFLAG_NOATIME;
426 if (iflags & EXT4_PROJINHERIT_FL)
427 xflags |= FS_XFLAG_PROJINHERIT;
428 return xflags;
429}
430
431#define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
432 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
433 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
434
435
436static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
437{
438 unsigned long iflags = 0;
439
440 if (xflags & FS_XFLAG_SYNC)
441 iflags |= EXT4_SYNC_FL;
442 if (xflags & FS_XFLAG_IMMUTABLE)
443 iflags |= EXT4_IMMUTABLE_FL;
444 if (xflags & FS_XFLAG_APPEND)
445 iflags |= EXT4_APPEND_FL;
446 if (xflags & FS_XFLAG_NODUMP)
447 iflags |= EXT4_NODUMP_FL;
448 if (xflags & FS_XFLAG_NOATIME)
449 iflags |= EXT4_NOATIME_FL;
450 if (xflags & FS_XFLAG_PROJINHERIT)
451 iflags |= EXT4_PROJINHERIT_FL;
452
453 return iflags;
454}
455
456static int ext4_shutdown(struct super_block *sb, unsigned long arg)
457{
458 struct ext4_sb_info *sbi = EXT4_SB(sb);
459 __u32 flags;
460
461 if (!capable(CAP_SYS_ADMIN))
462 return -EPERM;
463
464 if (get_user(flags, (__u32 __user *)arg))
465 return -EFAULT;
466
467 if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
468 return -EINVAL;
469
470 if (ext4_forced_shutdown(sbi))
471 return 0;
472
473 ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
474
475 switch (flags) {
476 case EXT4_GOING_FLAGS_DEFAULT:
477 freeze_bdev(sb->s_bdev);
478 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
479 thaw_bdev(sb->s_bdev, sb);
480 break;
481 case EXT4_GOING_FLAGS_LOGFLUSH:
482 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
483 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
484 (void) ext4_force_commit(sb);
485 jbd2_journal_abort(sbi->s_journal, 0);
486 }
487 break;
488 case EXT4_GOING_FLAGS_NOLOGFLUSH:
489 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
490 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
491 msleep(100);
492 jbd2_journal_abort(sbi->s_journal, 0);
493 }
494 break;
495 default:
496 return -EINVAL;
497 }
498 clear_opt(sb, DISCARD);
499 return 0;
500}
501
502struct getfsmap_info {
503 struct super_block *gi_sb;
504 struct fsmap_head __user *gi_data;
505 unsigned int gi_idx;
506 __u32 gi_last_flags;
507};
508
509static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
510{
511 struct getfsmap_info *info = priv;
512 struct fsmap fm;
513
514 trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
515
516 info->gi_last_flags = xfm->fmr_flags;
517 ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
518 if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
519 sizeof(struct fsmap)))
520 return -EFAULT;
521
522 return 0;
523}
524
525static int ext4_ioc_getfsmap(struct super_block *sb,
526 struct fsmap_head __user *arg)
527{
528 struct getfsmap_info info = {0};
529 struct ext4_fsmap_head xhead = {0};
530 struct fsmap_head head;
531 bool aborted = false;
532 int error;
533
534 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
535 return -EFAULT;
536 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
537 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
538 sizeof(head.fmh_keys[0].fmr_reserved)) ||
539 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
540 sizeof(head.fmh_keys[1].fmr_reserved)))
541 return -EINVAL;
542
543
544
545
546 if (head.fmh_keys[0].fmr_offset ||
547 (head.fmh_keys[1].fmr_offset != 0 &&
548 head.fmh_keys[1].fmr_offset != -1ULL))
549 return -EINVAL;
550
551 xhead.fmh_iflags = head.fmh_iflags;
552 xhead.fmh_count = head.fmh_count;
553 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
554 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
555
556 trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
557 trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
558
559 info.gi_sb = sb;
560 info.gi_data = arg;
561 error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
562 if (error == EXT4_QUERY_RANGE_ABORT) {
563 error = 0;
564 aborted = true;
565 } else if (error)
566 return error;
567
568
569 if (!aborted && info.gi_idx) {
570 info.gi_last_flags |= FMR_OF_LAST;
571 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
572 &info.gi_last_flags,
573 sizeof(info.gi_last_flags)))
574 return -EFAULT;
575 }
576
577
578 head.fmh_entries = xhead.fmh_entries;
579 head.fmh_oflags = xhead.fmh_oflags;
580 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
581 return -EFAULT;
582
583 return 0;
584}
585
586long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
587{
588 struct inode *inode = file_inode(filp);
589 struct super_block *sb = inode->i_sb;
590 struct ext4_inode_info *ei = EXT4_I(inode);
591 unsigned int flags;
592
593 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
594
595 switch (cmd) {
596 case FS_IOC_GETFSMAP:
597 return ext4_ioc_getfsmap(sb, (void __user *)arg);
598 case EXT4_IOC_GETFLAGS:
599 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
600 return put_user(flags, (int __user *) arg);
601 case EXT4_IOC_SETFLAGS: {
602 int err;
603
604 if (!inode_owner_or_capable(inode))
605 return -EACCES;
606
607 if (get_user(flags, (int __user *) arg))
608 return -EFAULT;
609
610 if (flags & ~EXT4_FL_USER_VISIBLE)
611 return -EOPNOTSUPP;
612
613
614
615
616
617
618 flags &= EXT4_FL_USER_MODIFIABLE;
619 if (ext4_mask_flags(inode->i_mode, flags) != flags)
620 return -EOPNOTSUPP;
621
622 err = mnt_want_write_file(filp);
623 if (err)
624 return err;
625
626 inode_lock(inode);
627 err = ext4_ioctl_setflags(inode, flags);
628 inode_unlock(inode);
629 mnt_drop_write_file(filp);
630 return err;
631 }
632 case EXT4_IOC_GETVERSION:
633 case EXT4_IOC_GETVERSION_OLD:
634 return put_user(inode->i_generation, (int __user *) arg);
635 case EXT4_IOC_SETVERSION:
636 case EXT4_IOC_SETVERSION_OLD: {
637 handle_t *handle;
638 struct ext4_iloc iloc;
639 __u32 generation;
640 int err;
641
642 if (!inode_owner_or_capable(inode))
643 return -EPERM;
644
645 if (ext4_has_metadata_csum(inode->i_sb)) {
646 ext4_warning(sb, "Setting inode version is not "
647 "supported with metadata_csum enabled.");
648 return -ENOTTY;
649 }
650
651 err = mnt_want_write_file(filp);
652 if (err)
653 return err;
654 if (get_user(generation, (int __user *) arg)) {
655 err = -EFAULT;
656 goto setversion_out;
657 }
658
659 inode_lock(inode);
660 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
661 if (IS_ERR(handle)) {
662 err = PTR_ERR(handle);
663 goto unlock_out;
664 }
665 err = ext4_reserve_inode_write(handle, inode, &iloc);
666 if (err == 0) {
667 inode->i_ctime = current_time(inode);
668 inode->i_generation = generation;
669 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
670 }
671 ext4_journal_stop(handle);
672
673unlock_out:
674 inode_unlock(inode);
675setversion_out:
676 mnt_drop_write_file(filp);
677 return err;
678 }
679 case EXT4_IOC_GROUP_EXTEND: {
680 ext4_fsblk_t n_blocks_count;
681 int err, err2=0;
682
683 err = ext4_resize_begin(sb);
684 if (err)
685 return err;
686
687 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
688 err = -EFAULT;
689 goto group_extend_out;
690 }
691
692 if (ext4_has_feature_bigalloc(sb)) {
693 ext4_msg(sb, KERN_ERR,
694 "Online resizing not supported with bigalloc");
695 err = -EOPNOTSUPP;
696 goto group_extend_out;
697 }
698
699 err = mnt_want_write_file(filp);
700 if (err)
701 goto group_extend_out;
702
703 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
704 if (EXT4_SB(sb)->s_journal) {
705 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
706 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
707 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
708 }
709 if (err == 0)
710 err = err2;
711 mnt_drop_write_file(filp);
712group_extend_out:
713 ext4_resize_end(sb);
714 return err;
715 }
716
717 case EXT4_IOC_MOVE_EXT: {
718 struct move_extent me;
719 struct fd donor;
720 int err;
721
722 if (!(filp->f_mode & FMODE_READ) ||
723 !(filp->f_mode & FMODE_WRITE))
724 return -EBADF;
725
726 if (copy_from_user(&me,
727 (struct move_extent __user *)arg, sizeof(me)))
728 return -EFAULT;
729 me.moved_len = 0;
730
731 donor = fdget(me.donor_fd);
732 if (!donor.file)
733 return -EBADF;
734
735 if (!(donor.file->f_mode & FMODE_WRITE)) {
736 err = -EBADF;
737 goto mext_out;
738 }
739
740 if (ext4_has_feature_bigalloc(sb)) {
741 ext4_msg(sb, KERN_ERR,
742 "Online defrag not supported with bigalloc");
743 err = -EOPNOTSUPP;
744 goto mext_out;
745 } else if (IS_DAX(inode)) {
746 ext4_msg(sb, KERN_ERR,
747 "Online defrag not supported with DAX");
748 err = -EOPNOTSUPP;
749 goto mext_out;
750 }
751
752 err = mnt_want_write_file(filp);
753 if (err)
754 goto mext_out;
755
756 err = ext4_move_extents(filp, donor.file, me.orig_start,
757 me.donor_start, me.len, &me.moved_len);
758 mnt_drop_write_file(filp);
759
760 if (copy_to_user((struct move_extent __user *)arg,
761 &me, sizeof(me)))
762 err = -EFAULT;
763mext_out:
764 fdput(donor);
765 return err;
766 }
767
768 case EXT4_IOC_GROUP_ADD: {
769 struct ext4_new_group_data input;
770 int err, err2=0;
771
772 err = ext4_resize_begin(sb);
773 if (err)
774 return err;
775
776 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
777 sizeof(input))) {
778 err = -EFAULT;
779 goto group_add_out;
780 }
781
782 if (ext4_has_feature_bigalloc(sb)) {
783 ext4_msg(sb, KERN_ERR,
784 "Online resizing not supported with bigalloc");
785 err = -EOPNOTSUPP;
786 goto group_add_out;
787 }
788
789 err = mnt_want_write_file(filp);
790 if (err)
791 goto group_add_out;
792
793 err = ext4_group_add(sb, &input);
794 if (EXT4_SB(sb)->s_journal) {
795 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
796 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
797 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
798 }
799 if (err == 0)
800 err = err2;
801 mnt_drop_write_file(filp);
802 if (!err && ext4_has_group_desc_csum(sb) &&
803 test_opt(sb, INIT_INODE_TABLE))
804 err = ext4_register_li_request(sb, input.group);
805group_add_out:
806 ext4_resize_end(sb);
807 return err;
808 }
809
810 case EXT4_IOC_MIGRATE:
811 {
812 int err;
813 if (!inode_owner_or_capable(inode))
814 return -EACCES;
815
816 err = mnt_want_write_file(filp);
817 if (err)
818 return err;
819
820
821
822
823
824
825 inode_lock((inode));
826 err = ext4_ext_migrate(inode);
827 inode_unlock((inode));
828 mnt_drop_write_file(filp);
829 return err;
830 }
831
832 case EXT4_IOC_ALLOC_DA_BLKS:
833 {
834 int err;
835 if (!inode_owner_or_capable(inode))
836 return -EACCES;
837
838 err = mnt_want_write_file(filp);
839 if (err)
840 return err;
841 err = ext4_alloc_da_blocks(inode);
842 mnt_drop_write_file(filp);
843 return err;
844 }
845
846 case EXT4_IOC_SWAP_BOOT:
847 {
848 int err;
849 if (!(filp->f_mode & FMODE_WRITE))
850 return -EBADF;
851 err = mnt_want_write_file(filp);
852 if (err)
853 return err;
854 err = swap_inode_boot_loader(sb, inode);
855 mnt_drop_write_file(filp);
856 return err;
857 }
858
859 case EXT4_IOC_RESIZE_FS: {
860 ext4_fsblk_t n_blocks_count;
861 int err = 0, err2 = 0;
862 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
863
864 if (ext4_has_feature_bigalloc(sb)) {
865 ext4_msg(sb, KERN_ERR,
866 "Online resizing not (yet) supported with bigalloc");
867 return -EOPNOTSUPP;
868 }
869
870 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
871 sizeof(__u64))) {
872 return -EFAULT;
873 }
874
875 err = ext4_resize_begin(sb);
876 if (err)
877 return err;
878
879 err = mnt_want_write_file(filp);
880 if (err)
881 goto resizefs_out;
882
883 err = ext4_resize_fs(sb, n_blocks_count);
884 if (EXT4_SB(sb)->s_journal) {
885 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
886 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
887 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
888 }
889 if (err == 0)
890 err = err2;
891 mnt_drop_write_file(filp);
892 if (!err && (o_group > EXT4_SB(sb)->s_groups_count) &&
893 ext4_has_group_desc_csum(sb) &&
894 test_opt(sb, INIT_INODE_TABLE))
895 err = ext4_register_li_request(sb, o_group);
896
897resizefs_out:
898 ext4_resize_end(sb);
899 return err;
900 }
901
902 case FITRIM:
903 {
904 struct request_queue *q = bdev_get_queue(sb->s_bdev);
905 struct fstrim_range range;
906 int ret = 0;
907
908 if (!capable(CAP_SYS_ADMIN))
909 return -EPERM;
910
911 if (!blk_queue_discard(q))
912 return -EOPNOTSUPP;
913
914 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
915 sizeof(range)))
916 return -EFAULT;
917
918 range.minlen = max((unsigned int)range.minlen,
919 q->limits.discard_granularity);
920 ret = ext4_trim_fs(sb, &range);
921 if (ret < 0)
922 return ret;
923
924 if (copy_to_user((struct fstrim_range __user *)arg, &range,
925 sizeof(range)))
926 return -EFAULT;
927
928 return 0;
929 }
930 case EXT4_IOC_PRECACHE_EXTENTS:
931 return ext4_ext_precache(inode);
932
933 case EXT4_IOC_SET_ENCRYPTION_POLICY:
934 if (!ext4_has_feature_encrypt(sb))
935 return -EOPNOTSUPP;
936 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
937
938 case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
939#ifdef CONFIG_EXT4_FS_ENCRYPTION
940 int err, err2;
941 struct ext4_sb_info *sbi = EXT4_SB(sb);
942 handle_t *handle;
943
944 if (!ext4_has_feature_encrypt(sb))
945 return -EOPNOTSUPP;
946 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
947 err = mnt_want_write_file(filp);
948 if (err)
949 return err;
950 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
951 if (IS_ERR(handle)) {
952 err = PTR_ERR(handle);
953 goto pwsalt_err_exit;
954 }
955 err = ext4_journal_get_write_access(handle, sbi->s_sbh);
956 if (err)
957 goto pwsalt_err_journal;
958 generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
959 err = ext4_handle_dirty_metadata(handle, NULL,
960 sbi->s_sbh);
961 pwsalt_err_journal:
962 err2 = ext4_journal_stop(handle);
963 if (err2 && !err)
964 err = err2;
965 pwsalt_err_exit:
966 mnt_drop_write_file(filp);
967 if (err)
968 return err;
969 }
970 if (copy_to_user((void __user *) arg,
971 sbi->s_es->s_encrypt_pw_salt, 16))
972 return -EFAULT;
973 return 0;
974#else
975 return -EOPNOTSUPP;
976#endif
977 }
978 case EXT4_IOC_GET_ENCRYPTION_POLICY:
979 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
980
981 case EXT4_IOC_FSGETXATTR:
982 {
983 struct fsxattr fa;
984
985 memset(&fa, 0, sizeof(struct fsxattr));
986 fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE);
987
988 if (ext4_has_feature_project(inode->i_sb)) {
989 fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
990 EXT4_I(inode)->i_projid);
991 }
992
993 if (copy_to_user((struct fsxattr __user *)arg,
994 &fa, sizeof(fa)))
995 return -EFAULT;
996 return 0;
997 }
998 case EXT4_IOC_FSSETXATTR:
999 {
1000 struct fsxattr fa;
1001 int err;
1002
1003 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
1004 sizeof(fa)))
1005 return -EFAULT;
1006
1007
1008 if (!inode_owner_or_capable(inode))
1009 return -EACCES;
1010
1011 if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
1012 return -EOPNOTSUPP;
1013
1014 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
1015 if (ext4_mask_flags(inode->i_mode, flags) != flags)
1016 return -EOPNOTSUPP;
1017
1018 err = mnt_want_write_file(filp);
1019 if (err)
1020 return err;
1021
1022 inode_lock(inode);
1023 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
1024 (flags & EXT4_FL_XFLAG_VISIBLE);
1025 err = ext4_ioctl_setflags(inode, flags);
1026 inode_unlock(inode);
1027 mnt_drop_write_file(filp);
1028 if (err)
1029 return err;
1030
1031 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
1032 if (err)
1033 return err;
1034
1035 return 0;
1036 }
1037 case EXT4_IOC_SHUTDOWN:
1038 return ext4_shutdown(sb, arg);
1039 default:
1040 return -ENOTTY;
1041 }
1042}
1043
1044#ifdef CONFIG_COMPAT
1045long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1046{
1047
1048 switch (cmd) {
1049 case EXT4_IOC32_GETFLAGS:
1050 cmd = EXT4_IOC_GETFLAGS;
1051 break;
1052 case EXT4_IOC32_SETFLAGS:
1053 cmd = EXT4_IOC_SETFLAGS;
1054 break;
1055 case EXT4_IOC32_GETVERSION:
1056 cmd = EXT4_IOC_GETVERSION;
1057 break;
1058 case EXT4_IOC32_SETVERSION:
1059 cmd = EXT4_IOC_SETVERSION;
1060 break;
1061 case EXT4_IOC32_GROUP_EXTEND:
1062 cmd = EXT4_IOC_GROUP_EXTEND;
1063 break;
1064 case EXT4_IOC32_GETVERSION_OLD:
1065 cmd = EXT4_IOC_GETVERSION_OLD;
1066 break;
1067 case EXT4_IOC32_SETVERSION_OLD:
1068 cmd = EXT4_IOC_SETVERSION_OLD;
1069 break;
1070 case EXT4_IOC32_GETRSVSZ:
1071 cmd = EXT4_IOC_GETRSVSZ;
1072 break;
1073 case EXT4_IOC32_SETRSVSZ:
1074 cmd = EXT4_IOC_SETRSVSZ;
1075 break;
1076 case EXT4_IOC32_GROUP_ADD: {
1077 struct compat_ext4_new_group_input __user *uinput;
1078 struct ext4_new_group_input input;
1079 mm_segment_t old_fs;
1080 int err;
1081
1082 uinput = compat_ptr(arg);
1083 err = get_user(input.group, &uinput->group);
1084 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1085 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1086 err |= get_user(input.inode_table, &uinput->inode_table);
1087 err |= get_user(input.blocks_count, &uinput->blocks_count);
1088 err |= get_user(input.reserved_blocks,
1089 &uinput->reserved_blocks);
1090 if (err)
1091 return -EFAULT;
1092 old_fs = get_fs();
1093 set_fs(KERNEL_DS);
1094 err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD,
1095 (unsigned long) &input);
1096 set_fs(old_fs);
1097 return err;
1098 }
1099 case EXT4_IOC_MOVE_EXT:
1100 case EXT4_IOC_RESIZE_FS:
1101 case EXT4_IOC_PRECACHE_EXTENTS:
1102 case EXT4_IOC_SET_ENCRYPTION_POLICY:
1103 case EXT4_IOC_GET_ENCRYPTION_PWSALT:
1104 case EXT4_IOC_GET_ENCRYPTION_POLICY:
1105 case EXT4_IOC_SHUTDOWN:
1106 case FS_IOC_GETFSMAP:
1107 break;
1108 default:
1109 return -ENOIOCTLCMD;
1110 }
1111 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1112}
1113#endif
1114
