Merge tag 'for-linus-5.15b-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6-microblaze.git] / fs / ext4 / ioctl.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * linux/fs/ext4/ioctl.c
4  *
5  * Copyright (C) 1993, 1994, 1995
6  * Remy Card (card@masi.ibp.fr)
7  * Laboratoire MASI - Institut Blaise Pascal
8  * Universite Pierre et Marie Curie (Paris VI)
9  */
10
11 #include <linux/fs.h>
12 #include <linux/capability.h>
13 #include <linux/time.h>
14 #include <linux/compat.h>
15 #include <linux/mount.h>
16 #include <linux/file.h>
17 #include <linux/quotaops.h>
18 #include <linux/random.h>
19 #include <linux/uuid.h>
20 #include <linux/uaccess.h>
21 #include <linux/delay.h>
22 #include <linux/iversion.h>
23 #include <linux/fileattr.h>
24 #include "ext4_jbd2.h"
25 #include "ext4.h"
26 #include <linux/fsmap.h>
27 #include "fsmap.h"
28 #include <trace/events/ext4.h>
29
30 /**
31  * Swap memory between @a and @b for @len bytes.
32  *
33  * @a:          pointer to first memory area
34  * @b:          pointer to second memory area
35  * @len:        number of bytes to swap
36  *
37  */
38 static void memswap(void *a, void *b, size_t len)
39 {
40         unsigned char *ap, *bp;
41
42         ap = (unsigned char *)a;
43         bp = (unsigned char *)b;
44         while (len-- > 0) {
45                 swap(*ap, *bp);
46                 ap++;
47                 bp++;
48         }
49 }
50
51 /**
52  * Swap i_data and associated attributes between @inode1 and @inode2.
53  * This function is used for the primary swap between inode1 and inode2
54  * and also to revert this primary swap in case of errors.
55  *
56  * Therefore you have to make sure, that calling this method twice
57  * will revert all changes.
58  *
59  * @inode1:     pointer to first inode
60  * @inode2:     pointer to second inode
61  */
62 static void swap_inode_data(struct inode *inode1, struct inode *inode2)
63 {
64         loff_t isize;
65         struct ext4_inode_info *ei1;
66         struct ext4_inode_info *ei2;
67         unsigned long tmp;
68
69         ei1 = EXT4_I(inode1);
70         ei2 = EXT4_I(inode2);
71
72         swap(inode1->i_version, inode2->i_version);
73         swap(inode1->i_atime, inode2->i_atime);
74         swap(inode1->i_mtime, inode2->i_mtime);
75
76         memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
77         tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP;
78         ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) |
79                 (ei1->i_flags & ~EXT4_FL_SHOULD_SWAP);
80         ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP);
81         swap(ei1->i_disksize, ei2->i_disksize);
82         ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
83         ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
84
85         isize = i_size_read(inode1);
86         i_size_write(inode1, i_size_read(inode2));
87         i_size_write(inode2, isize);
88 }
89
90 void ext4_reset_inode_seed(struct inode *inode)
91 {
92         struct ext4_inode_info *ei = EXT4_I(inode);
93         struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
94         __le32 inum = cpu_to_le32(inode->i_ino);
95         __le32 gen = cpu_to_le32(inode->i_generation);
96         __u32 csum;
97
98         if (!ext4_has_metadata_csum(inode->i_sb))
99                 return;
100
101         csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum));
102         ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen));
103 }
104
105 /**
106  * Swap the information from the given @inode and the inode
107  * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
108  * important fields of the inodes.
109  *
110  * @sb:         the super block of the filesystem
111  * @mnt_userns: user namespace of the mount the inode was found from
112  * @inode:      the inode to swap with EXT4_BOOT_LOADER_INO
113  *
114  */
115 static long swap_inode_boot_loader(struct super_block *sb,
116                                 struct user_namespace *mnt_userns,
117                                 struct inode *inode)
118 {
119         handle_t *handle;
120         int err;
121         struct inode *inode_bl;
122         struct ext4_inode_info *ei_bl;
123         qsize_t size, size_bl, diff;
124         blkcnt_t blocks;
125         unsigned short bytes;
126
127         inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO, EXT4_IGET_SPECIAL);
128         if (IS_ERR(inode_bl))
129                 return PTR_ERR(inode_bl);
130         ei_bl = EXT4_I(inode_bl);
131
132         /* Protect orig inodes against a truncate and make sure,
133          * that only 1 swap_inode_boot_loader is running. */
134         lock_two_nondirectories(inode, inode_bl);
135
136         if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
137             IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
138             (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
139             ext4_has_inline_data(inode)) {
140                 err = -EINVAL;
141                 goto journal_err_out;
142         }
143
144         if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
145             !inode_owner_or_capable(mnt_userns, inode) ||
146             !capable(CAP_SYS_ADMIN)) {
147                 err = -EPERM;
148                 goto journal_err_out;
149         }
150
151         filemap_invalidate_lock(inode->i_mapping);
152         err = filemap_write_and_wait(inode->i_mapping);
153         if (err)
154                 goto err_out;
155
156         err = filemap_write_and_wait(inode_bl->i_mapping);
157         if (err)
158                 goto err_out;
159
160         /* Wait for all existing dio workers */
161         inode_dio_wait(inode);
162         inode_dio_wait(inode_bl);
163
164         truncate_inode_pages(&inode->i_data, 0);
165         truncate_inode_pages(&inode_bl->i_data, 0);
166
167         handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
168         if (IS_ERR(handle)) {
169                 err = -EINVAL;
170                 goto err_out;
171         }
172         ext4_fc_start_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT);
173
174         /* Protect extent tree against block allocations via delalloc */
175         ext4_double_down_write_data_sem(inode, inode_bl);
176
177         if (inode_bl->i_nlink == 0) {
178                 /* this inode has never been used as a BOOT_LOADER */
179                 set_nlink(inode_bl, 1);
180                 i_uid_write(inode_bl, 0);
181                 i_gid_write(inode_bl, 0);
182                 inode_bl->i_flags = 0;
183                 ei_bl->i_flags = 0;
184                 inode_set_iversion(inode_bl, 1);
185                 i_size_write(inode_bl, 0);
186                 inode_bl->i_mode = S_IFREG;
187                 if (ext4_has_feature_extents(sb)) {
188                         ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
189                         ext4_ext_tree_init(handle, inode_bl);
190                 } else
191                         memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
192         }
193
194         err = dquot_initialize(inode);
195         if (err)
196                 goto err_out1;
197
198         size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
199         size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
200         diff = size - size_bl;
201         swap_inode_data(inode, inode_bl);
202
203         inode->i_ctime = inode_bl->i_ctime = current_time(inode);
204
205         inode->i_generation = prandom_u32();
206         inode_bl->i_generation = prandom_u32();
207         ext4_reset_inode_seed(inode);
208         ext4_reset_inode_seed(inode_bl);
209
210         ext4_discard_preallocations(inode, 0);
211
212         err = ext4_mark_inode_dirty(handle, inode);
213         if (err < 0) {
214                 /* No need to update quota information. */
215                 ext4_warning(inode->i_sb,
216                         "couldn't mark inode #%lu dirty (err %d)",
217                         inode->i_ino, err);
218                 /* Revert all changes: */
219                 swap_inode_data(inode, inode_bl);
220                 ext4_mark_inode_dirty(handle, inode);
221                 goto err_out1;
222         }
223
224         blocks = inode_bl->i_blocks;
225         bytes = inode_bl->i_bytes;
226         inode_bl->i_blocks = inode->i_blocks;
227         inode_bl->i_bytes = inode->i_bytes;
228         err = ext4_mark_inode_dirty(handle, inode_bl);
229         if (err < 0) {
230                 /* No need to update quota information. */
231                 ext4_warning(inode_bl->i_sb,
232                         "couldn't mark inode #%lu dirty (err %d)",
233                         inode_bl->i_ino, err);
234                 goto revert;
235         }
236
237         /* Bootloader inode should not be counted into quota information. */
238         if (diff > 0)
239                 dquot_free_space(inode, diff);
240         else
241                 err = dquot_alloc_space(inode, -1 * diff);
242
243         if (err < 0) {
244 revert:
245                 /* Revert all changes: */
246                 inode_bl->i_blocks = blocks;
247                 inode_bl->i_bytes = bytes;
248                 swap_inode_data(inode, inode_bl);
249                 ext4_mark_inode_dirty(handle, inode);
250                 ext4_mark_inode_dirty(handle, inode_bl);
251         }
252
253 err_out1:
254         ext4_journal_stop(handle);
255         ext4_fc_stop_ineligible(sb);
256         ext4_double_up_write_data_sem(inode, inode_bl);
257
258 err_out:
259         filemap_invalidate_unlock(inode->i_mapping);
260 journal_err_out:
261         unlock_two_nondirectories(inode, inode_bl);
262         iput(inode_bl);
263         return err;
264 }
265
266 #ifdef CONFIG_FS_ENCRYPTION
267 static int uuid_is_zero(__u8 u[16])
268 {
269         int     i;
270
271         for (i = 0; i < 16; i++)
272                 if (u[i])
273                         return 0;
274         return 1;
275 }
276 #endif
277
278 /*
279  * If immutable is set and we are not clearing it, we're not allowed to change
280  * anything else in the inode.  Don't error out if we're only trying to set
281  * immutable on an immutable file.
282  */
283 static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
284                                       unsigned int flags)
285 {
286         struct ext4_inode_info *ei = EXT4_I(inode);
287         unsigned int oldflags = ei->i_flags;
288
289         if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
290                 return 0;
291
292         if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
293                 return -EPERM;
294         if (ext4_has_feature_project(inode->i_sb) &&
295             __kprojid_val(ei->i_projid) != new_projid)
296                 return -EPERM;
297
298         return 0;
299 }
300
301 static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
302 {
303         struct ext4_inode_info *ei = EXT4_I(inode);
304
305         if (S_ISDIR(inode->i_mode))
306                 return;
307
308         if (test_opt2(inode->i_sb, DAX_NEVER) ||
309             test_opt(inode->i_sb, DAX_ALWAYS))
310                 return;
311
312         if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
313                 d_mark_dontcache(inode);
314 }
315
316 static bool dax_compatible(struct inode *inode, unsigned int oldflags,
317                            unsigned int flags)
318 {
319         /* Allow the DAX flag to be changed on inline directories */
320         if (S_ISDIR(inode->i_mode)) {
321                 flags &= ~EXT4_INLINE_DATA_FL;
322                 oldflags &= ~EXT4_INLINE_DATA_FL;
323         }
324
325         if (flags & EXT4_DAX_FL) {
326                 if ((oldflags & EXT4_DAX_MUT_EXCL) ||
327                      ext4_test_inode_state(inode,
328                                           EXT4_STATE_VERITY_IN_PROGRESS)) {
329                         return false;
330                 }
331         }
332
333         if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
334                         return false;
335
336         return true;
337 }
338
339 static int ext4_ioctl_setflags(struct inode *inode,
340                                unsigned int flags)
341 {
342         struct ext4_inode_info *ei = EXT4_I(inode);
343         handle_t *handle = NULL;
344         int err = -EPERM, migrate = 0;
345         struct ext4_iloc iloc;
346         unsigned int oldflags, mask, i;
347         struct super_block *sb = inode->i_sb;
348
349         /* Is it quota file? Do not allow user to mess with it */
350         if (ext4_is_quota_file(inode))
351                 goto flags_out;
352
353         oldflags = ei->i_flags;
354         /*
355          * The JOURNAL_DATA flag can only be changed by
356          * the relevant capability.
357          */
358         if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
359                 if (!capable(CAP_SYS_RESOURCE))
360                         goto flags_out;
361         }
362
363         if (!dax_compatible(inode, oldflags, flags)) {
364                 err = -EOPNOTSUPP;
365                 goto flags_out;
366         }
367
368         if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
369                 migrate = 1;
370
371         if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
372                 if (!ext4_has_feature_casefold(sb)) {
373                         err = -EOPNOTSUPP;
374                         goto flags_out;
375                 }
376
377                 if (!S_ISDIR(inode->i_mode)) {
378                         err = -ENOTDIR;
379                         goto flags_out;
380                 }
381
382                 if (!ext4_empty_dir(inode)) {
383                         err = -ENOTEMPTY;
384                         goto flags_out;
385                 }
386         }
387
388         /*
389          * Wait for all pending directio and then flush all the dirty pages
390          * for this file.  The flush marks all the pages readonly, so any
391          * subsequent attempt to write to the file (particularly mmap pages)
392          * will come through the filesystem and fail.
393          */
394         if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
395             (flags & EXT4_IMMUTABLE_FL)) {
396                 inode_dio_wait(inode);
397                 err = filemap_write_and_wait(inode->i_mapping);
398                 if (err)
399                         goto flags_out;
400         }
401
402         handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
403         if (IS_ERR(handle)) {
404                 err = PTR_ERR(handle);
405                 goto flags_out;
406         }
407         if (IS_SYNC(inode))
408                 ext4_handle_sync(handle);
409         err = ext4_reserve_inode_write(handle, inode, &iloc);
410         if (err)
411                 goto flags_err;
412
413         ext4_dax_dontcache(inode, flags);
414
415         for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
416                 if (!(mask & EXT4_FL_USER_MODIFIABLE))
417                         continue;
418                 /* These flags get special treatment later */
419                 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
420                         continue;
421                 if (mask & flags)
422                         ext4_set_inode_flag(inode, i);
423                 else
424                         ext4_clear_inode_flag(inode, i);
425         }
426
427         ext4_set_inode_flags(inode, false);
428
429         inode->i_ctime = current_time(inode);
430
431         err = ext4_mark_iloc_dirty(handle, inode, &iloc);
432 flags_err:
433         ext4_journal_stop(handle);
434         if (err)
435                 goto flags_out;
436
437         if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
438                 /*
439                  * Changes to the journaling mode can cause unsafe changes to
440                  * S_DAX if the inode is DAX
441                  */
442                 if (IS_DAX(inode)) {
443                         err = -EBUSY;
444                         goto flags_out;
445                 }
446
447                 err = ext4_change_inode_journal_flag(inode,
448                                                      flags & EXT4_JOURNAL_DATA_FL);
449                 if (err)
450                         goto flags_out;
451         }
452         if (migrate) {
453                 if (flags & EXT4_EXTENTS_FL)
454                         err = ext4_ext_migrate(inode);
455                 else
456                         err = ext4_ind_migrate(inode);
457         }
458
459 flags_out:
460         return err;
461 }
462
463 #ifdef CONFIG_QUOTA
464 static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
465 {
466         struct super_block *sb = inode->i_sb;
467         struct ext4_inode_info *ei = EXT4_I(inode);
468         int err, rc;
469         handle_t *handle;
470         kprojid_t kprojid;
471         struct ext4_iloc iloc;
472         struct ext4_inode *raw_inode;
473         struct dquot *transfer_to[MAXQUOTAS] = { };
474
475         if (!ext4_has_feature_project(sb)) {
476                 if (projid != EXT4_DEF_PROJID)
477                         return -EOPNOTSUPP;
478                 else
479                         return 0;
480         }
481
482         if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
483                 return -EOPNOTSUPP;
484
485         kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
486
487         if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
488                 return 0;
489
490         err = -EPERM;
491         /* Is it quota file? Do not allow user to mess with it */
492         if (ext4_is_quota_file(inode))
493                 return err;
494
495         err = ext4_get_inode_loc(inode, &iloc);
496         if (err)
497                 return err;
498
499         raw_inode = ext4_raw_inode(&iloc);
500         if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
501                 err = ext4_expand_extra_isize(inode,
502                                               EXT4_SB(sb)->s_want_extra_isize,
503                                               &iloc);
504                 if (err)
505                         return err;
506         } else {
507                 brelse(iloc.bh);
508         }
509
510         err = dquot_initialize(inode);
511         if (err)
512                 return err;
513
514         handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
515                 EXT4_QUOTA_INIT_BLOCKS(sb) +
516                 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
517         if (IS_ERR(handle))
518                 return PTR_ERR(handle);
519
520         err = ext4_reserve_inode_write(handle, inode, &iloc);
521         if (err)
522                 goto out_stop;
523
524         transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
525         if (!IS_ERR(transfer_to[PRJQUOTA])) {
526
527                 /* __dquot_transfer() calls back ext4_get_inode_usage() which
528                  * counts xattr inode references.
529                  */
530                 down_read(&EXT4_I(inode)->xattr_sem);
531                 err = __dquot_transfer(inode, transfer_to);
532                 up_read(&EXT4_I(inode)->xattr_sem);
533                 dqput(transfer_to[PRJQUOTA]);
534                 if (err)
535                         goto out_dirty;
536         }
537
538         EXT4_I(inode)->i_projid = kprojid;
539         inode->i_ctime = current_time(inode);
540 out_dirty:
541         rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
542         if (!err)
543                 err = rc;
544 out_stop:
545         ext4_journal_stop(handle);
546         return err;
547 }
548 #else
549 static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
550 {
551         if (projid != EXT4_DEF_PROJID)
552                 return -EOPNOTSUPP;
553         return 0;
554 }
555 #endif
556
557 static int ext4_shutdown(struct super_block *sb, unsigned long arg)
558 {
559         struct ext4_sb_info *sbi = EXT4_SB(sb);
560         __u32 flags;
561
562         if (!capable(CAP_SYS_ADMIN))
563                 return -EPERM;
564
565         if (get_user(flags, (__u32 __user *)arg))
566                 return -EFAULT;
567
568         if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
569                 return -EINVAL;
570
571         if (ext4_forced_shutdown(sbi))
572                 return 0;
573
574         ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
575         trace_ext4_shutdown(sb, flags);
576
577         switch (flags) {
578         case EXT4_GOING_FLAGS_DEFAULT:
579                 freeze_bdev(sb->s_bdev);
580                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
581                 thaw_bdev(sb->s_bdev);
582                 break;
583         case EXT4_GOING_FLAGS_LOGFLUSH:
584                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
585                 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
586                         (void) ext4_force_commit(sb);
587                         jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
588                 }
589                 break;
590         case EXT4_GOING_FLAGS_NOLOGFLUSH:
591                 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
592                 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
593                         jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
594                 break;
595         default:
596                 return -EINVAL;
597         }
598         clear_opt(sb, DISCARD);
599         return 0;
600 }
601
602 struct getfsmap_info {
603         struct super_block      *gi_sb;
604         struct fsmap_head __user *gi_data;
605         unsigned int            gi_idx;
606         __u32                   gi_last_flags;
607 };
608
609 static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
610 {
611         struct getfsmap_info *info = priv;
612         struct fsmap fm;
613
614         trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
615
616         info->gi_last_flags = xfm->fmr_flags;
617         ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
618         if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
619                         sizeof(struct fsmap)))
620                 return -EFAULT;
621
622         return 0;
623 }
624
625 static int ext4_ioc_getfsmap(struct super_block *sb,
626                              struct fsmap_head __user *arg)
627 {
628         struct getfsmap_info info = { NULL };
629         struct ext4_fsmap_head xhead = {0};
630         struct fsmap_head head;
631         bool aborted = false;
632         int error;
633
634         if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
635                 return -EFAULT;
636         if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
637             memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
638                        sizeof(head.fmh_keys[0].fmr_reserved)) ||
639             memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
640                        sizeof(head.fmh_keys[1].fmr_reserved)))
641                 return -EINVAL;
642         /*
643          * ext4 doesn't report file extents at all, so the only valid
644          * file offsets are the magic ones (all zeroes or all ones).
645          */
646         if (head.fmh_keys[0].fmr_offset ||
647             (head.fmh_keys[1].fmr_offset != 0 &&
648              head.fmh_keys[1].fmr_offset != -1ULL))
649                 return -EINVAL;
650
651         xhead.fmh_iflags = head.fmh_iflags;
652         xhead.fmh_count = head.fmh_count;
653         ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
654         ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
655
656         trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
657         trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
658
659         info.gi_sb = sb;
660         info.gi_data = arg;
661         error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
662         if (error == EXT4_QUERY_RANGE_ABORT)
663                 aborted = true;
664         else if (error)
665                 return error;
666
667         /* If we didn't abort, set the "last" flag in the last fmx */
668         if (!aborted && info.gi_idx) {
669                 info.gi_last_flags |= FMR_OF_LAST;
670                 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
671                                  &info.gi_last_flags,
672                                  sizeof(info.gi_last_flags)))
673                         return -EFAULT;
674         }
675
676         /* copy back header */
677         head.fmh_entries = xhead.fmh_entries;
678         head.fmh_oflags = xhead.fmh_oflags;
679         if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
680                 return -EFAULT;
681
682         return 0;
683 }
684
685 static long ext4_ioctl_group_add(struct file *file,
686                                  struct ext4_new_group_data *input)
687 {
688         struct super_block *sb = file_inode(file)->i_sb;
689         int err, err2=0;
690
691         err = ext4_resize_begin(sb);
692         if (err)
693                 return err;
694
695         if (ext4_has_feature_bigalloc(sb)) {
696                 ext4_msg(sb, KERN_ERR,
697                          "Online resizing not supported with bigalloc");
698                 err = -EOPNOTSUPP;
699                 goto group_add_out;
700         }
701
702         err = mnt_want_write_file(file);
703         if (err)
704                 goto group_add_out;
705
706         err = ext4_group_add(sb, input);
707         if (EXT4_SB(sb)->s_journal) {
708                 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
709                 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
710                 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
711         }
712         if (err == 0)
713                 err = err2;
714         mnt_drop_write_file(file);
715         if (!err && ext4_has_group_desc_csum(sb) &&
716             test_opt(sb, INIT_INODE_TABLE))
717                 err = ext4_register_li_request(sb, input->group);
718 group_add_out:
719         ext4_resize_end(sb);
720         return err;
721 }
722
723 int ext4_fileattr_get(struct dentry *dentry, struct fileattr *fa)
724 {
725         struct inode *inode = d_inode(dentry);
726         struct ext4_inode_info *ei = EXT4_I(inode);
727         u32 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
728
729         if (S_ISREG(inode->i_mode))
730                 flags &= ~FS_PROJINHERIT_FL;
731
732         fileattr_fill_flags(fa, flags);
733         if (ext4_has_feature_project(inode->i_sb))
734                 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
735
736         return 0;
737 }
738
739 int ext4_fileattr_set(struct user_namespace *mnt_userns,
740                       struct dentry *dentry, struct fileattr *fa)
741 {
742         struct inode *inode = d_inode(dentry);
743         u32 flags = fa->flags;
744         int err = -EOPNOTSUPP;
745
746         ext4_fc_start_update(inode);
747         if (flags & ~EXT4_FL_USER_VISIBLE)
748                 goto out;
749
750         /*
751          * chattr(1) grabs flags via GETFLAGS, modifies the result and
752          * passes that to SETFLAGS. So we cannot easily make SETFLAGS
753          * more restrictive than just silently masking off visible but
754          * not settable flags as we always did.
755          */
756         flags &= EXT4_FL_USER_MODIFIABLE;
757         if (ext4_mask_flags(inode->i_mode, flags) != flags)
758                 goto out;
759         err = ext4_ioctl_check_immutable(inode, fa->fsx_projid, flags);
760         if (err)
761                 goto out;
762         err = ext4_ioctl_setflags(inode, flags);
763         if (err)
764                 goto out;
765         err = ext4_ioctl_setproject(inode, fa->fsx_projid);
766 out:
767         ext4_fc_stop_update(inode);
768         return err;
769 }
770
771 /* So that the fiemap access checks can't overflow on 32 bit machines. */
772 #define FIEMAP_MAX_EXTENTS      (UINT_MAX / sizeof(struct fiemap_extent))
773
774 static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
775 {
776         struct fiemap fiemap;
777         struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
778         struct fiemap_extent_info fieinfo = { 0, };
779         struct inode *inode = file_inode(filp);
780         int error;
781
782         if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
783                 return -EFAULT;
784
785         if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
786                 return -EINVAL;
787
788         fieinfo.fi_flags = fiemap.fm_flags;
789         fieinfo.fi_extents_max = fiemap.fm_extent_count;
790         fieinfo.fi_extents_start = ufiemap->fm_extents;
791
792         error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
793                         fiemap.fm_length);
794         fiemap.fm_flags = fieinfo.fi_flags;
795         fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
796         if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
797                 error = -EFAULT;
798
799         return error;
800 }
801
802 static int ext4_ioctl_checkpoint(struct file *filp, unsigned long arg)
803 {
804         int err = 0;
805         __u32 flags = 0;
806         unsigned int flush_flags = 0;
807         struct super_block *sb = file_inode(filp)->i_sb;
808         struct request_queue *q;
809
810         if (copy_from_user(&flags, (__u32 __user *)arg,
811                                 sizeof(__u32)))
812                 return -EFAULT;
813
814         if (!capable(CAP_SYS_ADMIN))
815                 return -EPERM;
816
817         /* check for invalid bits set */
818         if ((flags & ~EXT4_IOC_CHECKPOINT_FLAG_VALID) ||
819                                 ((flags & JBD2_JOURNAL_FLUSH_DISCARD) &&
820                                 (flags & JBD2_JOURNAL_FLUSH_ZEROOUT)))
821                 return -EINVAL;
822
823         if (!EXT4_SB(sb)->s_journal)
824                 return -ENODEV;
825
826         if (flags & ~EXT4_IOC_CHECKPOINT_FLAG_VALID)
827                 return -EINVAL;
828
829         q = bdev_get_queue(EXT4_SB(sb)->s_journal->j_dev);
830         if (!q)
831                 return -ENXIO;
832         if ((flags & JBD2_JOURNAL_FLUSH_DISCARD) && !blk_queue_discard(q))
833                 return -EOPNOTSUPP;
834
835         if (flags & EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN)
836                 return 0;
837
838         if (flags & EXT4_IOC_CHECKPOINT_FLAG_DISCARD)
839                 flush_flags |= JBD2_JOURNAL_FLUSH_DISCARD;
840
841         if (flags & EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT) {
842                 flush_flags |= JBD2_JOURNAL_FLUSH_ZEROOUT;
843                 pr_info_ratelimited("warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow");
844         }
845
846         jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
847         err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, flush_flags);
848         jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
849
850         return err;
851 }
852
853 static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
854 {
855         struct inode *inode = file_inode(filp);
856         struct super_block *sb = inode->i_sb;
857         struct user_namespace *mnt_userns = file_mnt_user_ns(filp);
858
859         ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
860
861         switch (cmd) {
862         case FS_IOC_GETFSMAP:
863                 return ext4_ioc_getfsmap(sb, (void __user *)arg);
864         case EXT4_IOC_GETVERSION:
865         case EXT4_IOC_GETVERSION_OLD:
866                 return put_user(inode->i_generation, (int __user *) arg);
867         case EXT4_IOC_SETVERSION:
868         case EXT4_IOC_SETVERSION_OLD: {
869                 handle_t *handle;
870                 struct ext4_iloc iloc;
871                 __u32 generation;
872                 int err;
873
874                 if (!inode_owner_or_capable(mnt_userns, inode))
875                         return -EPERM;
876
877                 if (ext4_has_metadata_csum(inode->i_sb)) {
878                         ext4_warning(sb, "Setting inode version is not "
879                                      "supported with metadata_csum enabled.");
880                         return -ENOTTY;
881                 }
882
883                 err = mnt_want_write_file(filp);
884                 if (err)
885                         return err;
886                 if (get_user(generation, (int __user *) arg)) {
887                         err = -EFAULT;
888                         goto setversion_out;
889                 }
890
891                 inode_lock(inode);
892                 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
893                 if (IS_ERR(handle)) {
894                         err = PTR_ERR(handle);
895                         goto unlock_out;
896                 }
897                 err = ext4_reserve_inode_write(handle, inode, &iloc);
898                 if (err == 0) {
899                         inode->i_ctime = current_time(inode);
900                         inode->i_generation = generation;
901                         err = ext4_mark_iloc_dirty(handle, inode, &iloc);
902                 }
903                 ext4_journal_stop(handle);
904
905 unlock_out:
906                 inode_unlock(inode);
907 setversion_out:
908                 mnt_drop_write_file(filp);
909                 return err;
910         }
911         case EXT4_IOC_GROUP_EXTEND: {
912                 ext4_fsblk_t n_blocks_count;
913                 int err, err2=0;
914
915                 err = ext4_resize_begin(sb);
916                 if (err)
917                         return err;
918
919                 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
920                         err = -EFAULT;
921                         goto group_extend_out;
922                 }
923
924                 if (ext4_has_feature_bigalloc(sb)) {
925                         ext4_msg(sb, KERN_ERR,
926                                  "Online resizing not supported with bigalloc");
927                         err = -EOPNOTSUPP;
928                         goto group_extend_out;
929                 }
930
931                 err = mnt_want_write_file(filp);
932                 if (err)
933                         goto group_extend_out;
934
935                 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
936                 if (EXT4_SB(sb)->s_journal) {
937                         jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
938                         err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
939                         jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
940                 }
941                 if (err == 0)
942                         err = err2;
943                 mnt_drop_write_file(filp);
944 group_extend_out:
945                 ext4_resize_end(sb);
946                 return err;
947         }
948
949         case EXT4_IOC_MOVE_EXT: {
950                 struct move_extent me;
951                 struct fd donor;
952                 int err;
953
954                 if (!(filp->f_mode & FMODE_READ) ||
955                     !(filp->f_mode & FMODE_WRITE))
956                         return -EBADF;
957
958                 if (copy_from_user(&me,
959                         (struct move_extent __user *)arg, sizeof(me)))
960                         return -EFAULT;
961                 me.moved_len = 0;
962
963                 donor = fdget(me.donor_fd);
964                 if (!donor.file)
965                         return -EBADF;
966
967                 if (!(donor.file->f_mode & FMODE_WRITE)) {
968                         err = -EBADF;
969                         goto mext_out;
970                 }
971
972                 if (ext4_has_feature_bigalloc(sb)) {
973                         ext4_msg(sb, KERN_ERR,
974                                  "Online defrag not supported with bigalloc");
975                         err = -EOPNOTSUPP;
976                         goto mext_out;
977                 } else if (IS_DAX(inode)) {
978                         ext4_msg(sb, KERN_ERR,
979                                  "Online defrag not supported with DAX");
980                         err = -EOPNOTSUPP;
981                         goto mext_out;
982                 }
983
984                 err = mnt_want_write_file(filp);
985                 if (err)
986                         goto mext_out;
987
988                 err = ext4_move_extents(filp, donor.file, me.orig_start,
989                                         me.donor_start, me.len, &me.moved_len);
990                 mnt_drop_write_file(filp);
991
992                 if (copy_to_user((struct move_extent __user *)arg,
993                                  &me, sizeof(me)))
994                         err = -EFAULT;
995 mext_out:
996                 fdput(donor);
997                 return err;
998         }
999
1000         case EXT4_IOC_GROUP_ADD: {
1001                 struct ext4_new_group_data input;
1002
1003                 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
1004                                 sizeof(input)))
1005                         return -EFAULT;
1006
1007                 return ext4_ioctl_group_add(filp, &input);
1008         }
1009
1010         case EXT4_IOC_MIGRATE:
1011         {
1012                 int err;
1013                 if (!inode_owner_or_capable(mnt_userns, inode))
1014                         return -EACCES;
1015
1016                 err = mnt_want_write_file(filp);
1017                 if (err)
1018                         return err;
1019                 /*
1020                  * inode_mutex prevent write and truncate on the file.
1021                  * Read still goes through. We take i_data_sem in
1022                  * ext4_ext_swap_inode_data before we switch the
1023                  * inode format to prevent read.
1024                  */
1025                 inode_lock((inode));
1026                 err = ext4_ext_migrate(inode);
1027                 inode_unlock((inode));
1028                 mnt_drop_write_file(filp);
1029                 return err;
1030         }
1031
1032         case EXT4_IOC_ALLOC_DA_BLKS:
1033         {
1034                 int err;
1035                 if (!inode_owner_or_capable(mnt_userns, inode))
1036                         return -EACCES;
1037
1038                 err = mnt_want_write_file(filp);
1039                 if (err)
1040                         return err;
1041                 err = ext4_alloc_da_blocks(inode);
1042                 mnt_drop_write_file(filp);
1043                 return err;
1044         }
1045
1046         case EXT4_IOC_SWAP_BOOT:
1047         {
1048                 int err;
1049                 if (!(filp->f_mode & FMODE_WRITE))
1050                         return -EBADF;
1051                 err = mnt_want_write_file(filp);
1052                 if (err)
1053                         return err;
1054                 err = swap_inode_boot_loader(sb, mnt_userns, inode);
1055                 mnt_drop_write_file(filp);
1056                 return err;
1057         }
1058
1059         case EXT4_IOC_RESIZE_FS: {
1060                 ext4_fsblk_t n_blocks_count;
1061                 int err = 0, err2 = 0;
1062                 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
1063
1064                 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
1065                                    sizeof(__u64))) {
1066                         return -EFAULT;
1067                 }
1068
1069                 err = ext4_resize_begin(sb);
1070                 if (err)
1071                         return err;
1072
1073                 err = mnt_want_write_file(filp);
1074                 if (err)
1075                         goto resizefs_out;
1076
1077                 err = ext4_resize_fs(sb, n_blocks_count);
1078                 if (EXT4_SB(sb)->s_journal) {
1079                         ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE);
1080                         jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1081                         err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
1082                         jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1083                 }
1084                 if (err == 0)
1085                         err = err2;
1086                 mnt_drop_write_file(filp);
1087                 if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
1088                     ext4_has_group_desc_csum(sb) &&
1089                     test_opt(sb, INIT_INODE_TABLE))
1090                         err = ext4_register_li_request(sb, o_group);
1091
1092 resizefs_out:
1093                 ext4_resize_end(sb);
1094                 return err;
1095         }
1096
1097         case FITRIM:
1098         {
1099                 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1100                 struct fstrim_range range;
1101                 int ret = 0;
1102
1103                 if (!capable(CAP_SYS_ADMIN))
1104                         return -EPERM;
1105
1106                 if (!blk_queue_discard(q))
1107                         return -EOPNOTSUPP;
1108
1109                 /*
1110                  * We haven't replayed the journal, so we cannot use our
1111                  * block-bitmap-guided storage zapping commands.
1112                  */
1113                 if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
1114                         return -EROFS;
1115
1116                 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1117                     sizeof(range)))
1118                         return -EFAULT;
1119
1120                 range.minlen = max((unsigned int)range.minlen,
1121                                    q->limits.discard_granularity);
1122                 ret = ext4_trim_fs(sb, &range);
1123                 if (ret < 0)
1124                         return ret;
1125
1126                 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1127                     sizeof(range)))
1128                         return -EFAULT;
1129
1130                 return 0;
1131         }
1132         case EXT4_IOC_PRECACHE_EXTENTS:
1133                 return ext4_ext_precache(inode);
1134
1135         case FS_IOC_SET_ENCRYPTION_POLICY:
1136                 if (!ext4_has_feature_encrypt(sb))
1137                         return -EOPNOTSUPP;
1138                 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
1139
1140         case FS_IOC_GET_ENCRYPTION_PWSALT: {
1141 #ifdef CONFIG_FS_ENCRYPTION
1142                 int err, err2;
1143                 struct ext4_sb_info *sbi = EXT4_SB(sb);
1144                 handle_t *handle;
1145
1146                 if (!ext4_has_feature_encrypt(sb))
1147                         return -EOPNOTSUPP;
1148                 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
1149                         err = mnt_want_write_file(filp);
1150                         if (err)
1151                                 return err;
1152                         handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
1153                         if (IS_ERR(handle)) {
1154                                 err = PTR_ERR(handle);
1155                                 goto pwsalt_err_exit;
1156                         }
1157                         err = ext4_journal_get_write_access(handle, sb,
1158                                                             sbi->s_sbh,
1159                                                             EXT4_JTR_NONE);
1160                         if (err)
1161                                 goto pwsalt_err_journal;
1162                         lock_buffer(sbi->s_sbh);
1163                         generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
1164                         ext4_superblock_csum_set(sb);
1165                         unlock_buffer(sbi->s_sbh);
1166                         err = ext4_handle_dirty_metadata(handle, NULL,
1167                                                          sbi->s_sbh);
1168                 pwsalt_err_journal:
1169                         err2 = ext4_journal_stop(handle);
1170                         if (err2 && !err)
1171                                 err = err2;
1172                 pwsalt_err_exit:
1173                         mnt_drop_write_file(filp);
1174                         if (err)
1175                                 return err;
1176                 }
1177                 if (copy_to_user((void __user *) arg,
1178                                  sbi->s_es->s_encrypt_pw_salt, 16))
1179                         return -EFAULT;
1180                 return 0;
1181 #else
1182                 return -EOPNOTSUPP;
1183 #endif
1184         }
1185         case FS_IOC_GET_ENCRYPTION_POLICY:
1186                 if (!ext4_has_feature_encrypt(sb))
1187                         return -EOPNOTSUPP;
1188                 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1189
1190         case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1191                 if (!ext4_has_feature_encrypt(sb))
1192                         return -EOPNOTSUPP;
1193                 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1194
1195         case FS_IOC_ADD_ENCRYPTION_KEY:
1196                 if (!ext4_has_feature_encrypt(sb))
1197                         return -EOPNOTSUPP;
1198                 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1199
1200         case FS_IOC_REMOVE_ENCRYPTION_KEY:
1201                 if (!ext4_has_feature_encrypt(sb))
1202                         return -EOPNOTSUPP;
1203                 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1204
1205         case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1206                 if (!ext4_has_feature_encrypt(sb))
1207                         return -EOPNOTSUPP;
1208                 return fscrypt_ioctl_remove_key_all_users(filp,
1209                                                           (void __user *)arg);
1210         case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1211                 if (!ext4_has_feature_encrypt(sb))
1212                         return -EOPNOTSUPP;
1213                 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1214
1215         case FS_IOC_GET_ENCRYPTION_NONCE:
1216                 if (!ext4_has_feature_encrypt(sb))
1217                         return -EOPNOTSUPP;
1218                 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
1219
1220         case EXT4_IOC_CLEAR_ES_CACHE:
1221         {
1222                 if (!inode_owner_or_capable(mnt_userns, inode))
1223                         return -EACCES;
1224                 ext4_clear_inode_es(inode);
1225                 return 0;
1226         }
1227
1228         case EXT4_IOC_GETSTATE:
1229         {
1230                 __u32   state = 0;
1231
1232                 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1233                         state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1234                 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1235                         state |= EXT4_STATE_FLAG_NEW;
1236                 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1237                         state |= EXT4_STATE_FLAG_NEWENTRY;
1238                 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1239                         state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1240
1241                 return put_user(state, (__u32 __user *) arg);
1242         }
1243
1244         case EXT4_IOC_GET_ES_CACHE:
1245                 return ext4_ioctl_get_es_cache(filp, arg);
1246
1247         case EXT4_IOC_SHUTDOWN:
1248                 return ext4_shutdown(sb, arg);
1249
1250         case FS_IOC_ENABLE_VERITY:
1251                 if (!ext4_has_feature_verity(sb))
1252                         return -EOPNOTSUPP;
1253                 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1254
1255         case FS_IOC_MEASURE_VERITY:
1256                 if (!ext4_has_feature_verity(sb))
1257                         return -EOPNOTSUPP;
1258                 return fsverity_ioctl_measure(filp, (void __user *)arg);
1259
1260         case FS_IOC_READ_VERITY_METADATA:
1261                 if (!ext4_has_feature_verity(sb))
1262                         return -EOPNOTSUPP;
1263                 return fsverity_ioctl_read_metadata(filp,
1264                                                     (const void __user *)arg);
1265
1266         case EXT4_IOC_CHECKPOINT:
1267                 return ext4_ioctl_checkpoint(filp, arg);
1268
1269         default:
1270                 return -ENOTTY;
1271         }
1272 }
1273
1274 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1275 {
1276         long ret;
1277
1278         ext4_fc_start_update(file_inode(filp));
1279         ret = __ext4_ioctl(filp, cmd, arg);
1280         ext4_fc_stop_update(file_inode(filp));
1281
1282         return ret;
1283 }
1284
1285 #ifdef CONFIG_COMPAT
1286 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1287 {
1288         /* These are just misnamed, they actually get/put from/to user an int */
1289         switch (cmd) {
1290         case EXT4_IOC32_GETVERSION:
1291                 cmd = EXT4_IOC_GETVERSION;
1292                 break;
1293         case EXT4_IOC32_SETVERSION:
1294                 cmd = EXT4_IOC_SETVERSION;
1295                 break;
1296         case EXT4_IOC32_GROUP_EXTEND:
1297                 cmd = EXT4_IOC_GROUP_EXTEND;
1298                 break;
1299         case EXT4_IOC32_GETVERSION_OLD:
1300                 cmd = EXT4_IOC_GETVERSION_OLD;
1301                 break;
1302         case EXT4_IOC32_SETVERSION_OLD:
1303                 cmd = EXT4_IOC_SETVERSION_OLD;
1304                 break;
1305         case EXT4_IOC32_GETRSVSZ:
1306                 cmd = EXT4_IOC_GETRSVSZ;
1307                 break;
1308         case EXT4_IOC32_SETRSVSZ:
1309                 cmd = EXT4_IOC_SETRSVSZ;
1310                 break;
1311         case EXT4_IOC32_GROUP_ADD: {
1312                 struct compat_ext4_new_group_input __user *uinput;
1313                 struct ext4_new_group_data input;
1314                 int err;
1315
1316                 uinput = compat_ptr(arg);
1317                 err = get_user(input.group, &uinput->group);
1318                 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1319                 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1320                 err |= get_user(input.inode_table, &uinput->inode_table);
1321                 err |= get_user(input.blocks_count, &uinput->blocks_count);
1322                 err |= get_user(input.reserved_blocks,
1323                                 &uinput->reserved_blocks);
1324                 if (err)
1325                         return -EFAULT;
1326                 return ext4_ioctl_group_add(file, &input);
1327         }
1328         case EXT4_IOC_MOVE_EXT:
1329         case EXT4_IOC_RESIZE_FS:
1330         case FITRIM:
1331         case EXT4_IOC_PRECACHE_EXTENTS:
1332         case FS_IOC_SET_ENCRYPTION_POLICY:
1333         case FS_IOC_GET_ENCRYPTION_PWSALT:
1334         case FS_IOC_GET_ENCRYPTION_POLICY:
1335         case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1336         case FS_IOC_ADD_ENCRYPTION_KEY:
1337         case FS_IOC_REMOVE_ENCRYPTION_KEY:
1338         case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1339         case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1340         case FS_IOC_GET_ENCRYPTION_NONCE:
1341         case EXT4_IOC_SHUTDOWN:
1342         case FS_IOC_GETFSMAP:
1343         case FS_IOC_ENABLE_VERITY:
1344         case FS_IOC_MEASURE_VERITY:
1345         case FS_IOC_READ_VERITY_METADATA:
1346         case EXT4_IOC_CLEAR_ES_CACHE:
1347         case EXT4_IOC_GETSTATE:
1348         case EXT4_IOC_GET_ES_CACHE:
1349         case EXT4_IOC_CHECKPOINT:
1350                 break;
1351         default:
1352                 return -ENOIOCTLCMD;
1353         }
1354         return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1355 }
1356 #endif