Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
ac27a0ec | 2 | /* |
617ba13b | 3 | * linux/fs/ext4/ioctl.c |
ac27a0ec DK |
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> | |
ac27a0ec | 12 | #include <linux/capability.h> |
ac27a0ec DK |
13 | #include <linux/time.h> |
14 | #include <linux/compat.h> | |
42a74f20 | 15 | #include <linux/mount.h> |
748de673 | 16 | #include <linux/file.h> |
9b7365fc | 17 | #include <linux/quotaops.h> |
8da4b8c4 | 18 | #include <linux/uuid.h> |
7c0f6ba6 | 19 | #include <linux/uaccess.h> |
783d9485 | 20 | #include <linux/delay.h> |
3dcf5451 CH |
21 | #include "ext4_jbd2.h" |
22 | #include "ext4.h" | |
0c9ec4be DW |
23 | #include <linux/fsmap.h> |
24 | #include "fsmap.h" | |
25 | #include <trace/events/ext4.h> | |
ac27a0ec | 26 | |
393d1d1d DTB |
27 | /** |
28 | * Swap memory between @a and @b for @len bytes. | |
29 | * | |
30 | * @a: pointer to first memory area | |
31 | * @b: pointer to second memory area | |
32 | * @len: number of bytes to swap | |
33 | * | |
34 | */ | |
35 | static void memswap(void *a, void *b, size_t len) | |
36 | { | |
37 | unsigned char *ap, *bp; | |
393d1d1d DTB |
38 | |
39 | ap = (unsigned char *)a; | |
40 | bp = (unsigned char *)b; | |
41 | while (len-- > 0) { | |
4b7e2db5 | 42 | swap(*ap, *bp); |
393d1d1d DTB |
43 | ap++; |
44 | bp++; | |
45 | } | |
46 | } | |
47 | ||
48 | /** | |
49 | * Swap i_data and associated attributes between @inode1 and @inode2. | |
50 | * This function is used for the primary swap between inode1 and inode2 | |
51 | * and also to revert this primary swap in case of errors. | |
52 | * | |
53 | * Therefore you have to make sure, that calling this method twice | |
54 | * will revert all changes. | |
55 | * | |
56 | * @inode1: pointer to first inode | |
57 | * @inode2: pointer to second inode | |
58 | */ | |
59 | static void swap_inode_data(struct inode *inode1, struct inode *inode2) | |
60 | { | |
61 | loff_t isize; | |
62 | struct ext4_inode_info *ei1; | |
63 | struct ext4_inode_info *ei2; | |
80988933 | 64 | unsigned long tmp; |
393d1d1d DTB |
65 | |
66 | ei1 = EXT4_I(inode1); | |
67 | ei2 = EXT4_I(inode2); | |
68 | ||
9c5d58fb JL |
69 | swap(inode1->i_flags, inode2->i_flags); |
70 | swap(inode1->i_version, inode2->i_version); | |
71 | swap(inode1->i_blocks, inode2->i_blocks); | |
72 | swap(inode1->i_bytes, inode2->i_bytes); | |
73 | swap(inode1->i_atime, inode2->i_atime); | |
74 | swap(inode1->i_mtime, inode2->i_mtime); | |
393d1d1d DTB |
75 | |
76 | memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); | |
80988933 | 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); | |
9c5d58fb | 81 | swap(ei1->i_disksize, ei2->i_disksize); |
cde2d7a7 TT |
82 | ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); |
83 | ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); | |
393d1d1d DTB |
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 | /** | |
91 | * Swap the information from the given @inode and the inode | |
92 | * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other | |
93 | * important fields of the inodes. | |
94 | * | |
95 | * @sb: the super block of the filesystem | |
96 | * @inode: the inode to swap with EXT4_BOOT_LOADER_INO | |
97 | * | |
98 | */ | |
99 | static long swap_inode_boot_loader(struct super_block *sb, | |
100 | struct inode *inode) | |
101 | { | |
102 | handle_t *handle; | |
103 | int err; | |
104 | struct inode *inode_bl; | |
393d1d1d | 105 | struct ext4_inode_info *ei_bl; |
d7092ae2 | 106 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
393d1d1d | 107 | |
d8558a29 TT |
108 | if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) |
109 | return -EINVAL; | |
393d1d1d | 110 | |
d8558a29 TT |
111 | if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) |
112 | return -EPERM; | |
393d1d1d | 113 | |
393d1d1d | 114 | inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); |
d8558a29 TT |
115 | if (IS_ERR(inode_bl)) |
116 | return PTR_ERR(inode_bl); | |
393d1d1d DTB |
117 | ei_bl = EXT4_I(inode_bl); |
118 | ||
119 | filemap_flush(inode->i_mapping); | |
120 | filemap_flush(inode_bl->i_mapping); | |
121 | ||
122 | /* Protect orig inodes against a truncate and make sure, | |
123 | * that only 1 swap_inode_boot_loader is running. */ | |
375e289e | 124 | lock_two_nondirectories(inode, inode_bl); |
393d1d1d DTB |
125 | |
126 | truncate_inode_pages(&inode->i_data, 0); | |
127 | truncate_inode_pages(&inode_bl->i_data, 0); | |
128 | ||
129 | /* Wait for all existing dio workers */ | |
130 | ext4_inode_block_unlocked_dio(inode); | |
131 | ext4_inode_block_unlocked_dio(inode_bl); | |
132 | inode_dio_wait(inode); | |
133 | inode_dio_wait(inode_bl); | |
134 | ||
135 | handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); | |
136 | if (IS_ERR(handle)) { | |
137 | err = -EINVAL; | |
30d29b11 | 138 | goto journal_err_out; |
393d1d1d DTB |
139 | } |
140 | ||
141 | /* Protect extent tree against block allocations via delalloc */ | |
142 | ext4_double_down_write_data_sem(inode, inode_bl); | |
143 | ||
144 | if (inode_bl->i_nlink == 0) { | |
145 | /* this inode has never been used as a BOOT_LOADER */ | |
146 | set_nlink(inode_bl, 1); | |
147 | i_uid_write(inode_bl, 0); | |
148 | i_gid_write(inode_bl, 0); | |
149 | inode_bl->i_flags = 0; | |
150 | ei_bl->i_flags = 0; | |
151 | inode_bl->i_version = 1; | |
152 | i_size_write(inode_bl, 0); | |
153 | inode_bl->i_mode = S_IFREG; | |
e2b911c5 | 154 | if (ext4_has_feature_extents(sb)) { |
393d1d1d DTB |
155 | ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); |
156 | ext4_ext_tree_init(handle, inode_bl); | |
157 | } else | |
158 | memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); | |
159 | } | |
160 | ||
161 | swap_inode_data(inode, inode_bl); | |
162 | ||
eeca7ea1 | 163 | inode->i_ctime = inode_bl->i_ctime = current_time(inode); |
393d1d1d DTB |
164 | |
165 | spin_lock(&sbi->s_next_gen_lock); | |
166 | inode->i_generation = sbi->s_next_generation++; | |
167 | inode_bl->i_generation = sbi->s_next_generation++; | |
168 | spin_unlock(&sbi->s_next_gen_lock); | |
169 | ||
170 | ext4_discard_preallocations(inode); | |
171 | ||
172 | err = ext4_mark_inode_dirty(handle, inode); | |
173 | if (err < 0) { | |
174 | ext4_warning(inode->i_sb, | |
175 | "couldn't mark inode #%lu dirty (err %d)", | |
176 | inode->i_ino, err); | |
177 | /* Revert all changes: */ | |
178 | swap_inode_data(inode, inode_bl); | |
179 | } else { | |
180 | err = ext4_mark_inode_dirty(handle, inode_bl); | |
181 | if (err < 0) { | |
182 | ext4_warning(inode_bl->i_sb, | |
183 | "couldn't mark inode #%lu dirty (err %d)", | |
184 | inode_bl->i_ino, err); | |
185 | /* Revert all changes: */ | |
186 | swap_inode_data(inode, inode_bl); | |
187 | ext4_mark_inode_dirty(handle, inode); | |
188 | } | |
189 | } | |
393d1d1d | 190 | ext4_journal_stop(handle); |
393d1d1d DTB |
191 | ext4_double_up_write_data_sem(inode, inode_bl); |
192 | ||
30d29b11 | 193 | journal_err_out: |
393d1d1d DTB |
194 | ext4_inode_resume_unlocked_dio(inode); |
195 | ext4_inode_resume_unlocked_dio(inode_bl); | |
375e289e | 196 | unlock_two_nondirectories(inode, inode_bl); |
393d1d1d | 197 | iput(inode_bl); |
393d1d1d DTB |
198 | return err; |
199 | } | |
200 | ||
ba679017 | 201 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
9bd8212f MH |
202 | static int uuid_is_zero(__u8 u[16]) |
203 | { | |
204 | int i; | |
205 | ||
206 | for (i = 0; i < 16; i++) | |
207 | if (u[i]) | |
208 | return 0; | |
209 | return 1; | |
210 | } | |
ba679017 | 211 | #endif |
9bd8212f | 212 | |
9b7365fc LX |
213 | static int ext4_ioctl_setflags(struct inode *inode, |
214 | unsigned int flags) | |
215 | { | |
216 | struct ext4_inode_info *ei = EXT4_I(inode); | |
217 | handle_t *handle = NULL; | |
fdde368e | 218 | int err = -EPERM, migrate = 0; |
9b7365fc LX |
219 | struct ext4_iloc iloc; |
220 | unsigned int oldflags, mask, i; | |
221 | unsigned int jflag; | |
222 | ||
223 | /* Is it quota file? Do not allow user to mess with it */ | |
02749a4c | 224 | if (ext4_is_quota_file(inode)) |
9b7365fc LX |
225 | goto flags_out; |
226 | ||
227 | oldflags = ei->i_flags; | |
228 | ||
229 | /* The JOURNAL_DATA flag is modifiable only by root */ | |
230 | jflag = flags & EXT4_JOURNAL_DATA_FL; | |
231 | ||
232 | /* | |
233 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
234 | * the relevant capability. | |
235 | * | |
236 | * This test looks nicer. Thanks to Pauline Middelink | |
237 | */ | |
238 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { | |
239 | if (!capable(CAP_LINUX_IMMUTABLE)) | |
240 | goto flags_out; | |
241 | } | |
242 | ||
243 | /* | |
244 | * The JOURNAL_DATA flag can only be changed by | |
245 | * the relevant capability. | |
246 | */ | |
247 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { | |
248 | if (!capable(CAP_SYS_RESOURCE)) | |
249 | goto flags_out; | |
250 | } | |
251 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) | |
252 | migrate = 1; | |
253 | ||
254 | if (flags & EXT4_EOFBLOCKS_FL) { | |
255 | /* we don't support adding EOFBLOCKS flag */ | |
256 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { | |
257 | err = -EOPNOTSUPP; | |
258 | goto flags_out; | |
259 | } | |
2c98eb5e TT |
260 | } else if (oldflags & EXT4_EOFBLOCKS_FL) { |
261 | err = ext4_truncate(inode); | |
262 | if (err) | |
263 | goto flags_out; | |
264 | } | |
9b7365fc LX |
265 | |
266 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); | |
267 | if (IS_ERR(handle)) { | |
268 | err = PTR_ERR(handle); | |
269 | goto flags_out; | |
270 | } | |
271 | if (IS_SYNC(inode)) | |
272 | ext4_handle_sync(handle); | |
273 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
274 | if (err) | |
275 | goto flags_err; | |
276 | ||
277 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { | |
278 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
279 | continue; | |
f8011d93 JK |
280 | /* These flags get special treatment later */ |
281 | if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL) | |
282 | continue; | |
9b7365fc LX |
283 | if (mask & flags) |
284 | ext4_set_inode_flag(inode, i); | |
285 | else | |
286 | ext4_clear_inode_flag(inode, i); | |
287 | } | |
288 | ||
289 | ext4_set_inode_flags(inode); | |
eeca7ea1 | 290 | inode->i_ctime = current_time(inode); |
9b7365fc LX |
291 | |
292 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
293 | flags_err: | |
294 | ext4_journal_stop(handle); | |
295 | if (err) | |
296 | goto flags_out; | |
297 | ||
22e51908 RZ |
298 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { |
299 | /* | |
300 | * Changes to the journaling mode can cause unsafe changes to | |
301 | * S_DAX if we are using the DAX mount option. | |
302 | */ | |
303 | if (test_opt(inode->i_sb, DAX)) { | |
304 | err = -EBUSY; | |
305 | goto flags_out; | |
306 | } | |
307 | ||
9b7365fc | 308 | err = ext4_change_inode_journal_flag(inode, jflag); |
22e51908 RZ |
309 | if (err) |
310 | goto flags_out; | |
311 | } | |
9b7365fc LX |
312 | if (migrate) { |
313 | if (flags & EXT4_EXTENTS_FL) | |
314 | err = ext4_ext_migrate(inode); | |
315 | else | |
316 | err = ext4_ind_migrate(inode); | |
317 | } | |
318 | ||
319 | flags_out: | |
320 | return err; | |
321 | } | |
322 | ||
323 | #ifdef CONFIG_QUOTA | |
324 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
325 | { | |
326 | struct inode *inode = file_inode(filp); | |
327 | struct super_block *sb = inode->i_sb; | |
328 | struct ext4_inode_info *ei = EXT4_I(inode); | |
329 | int err, rc; | |
330 | handle_t *handle; | |
331 | kprojid_t kprojid; | |
332 | struct ext4_iloc iloc; | |
333 | struct ext4_inode *raw_inode; | |
079788d0 | 334 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
9b7365fc | 335 | |
0b7b7779 | 336 | if (!ext4_has_feature_project(sb)) { |
9b7365fc LX |
337 | if (projid != EXT4_DEF_PROJID) |
338 | return -EOPNOTSUPP; | |
339 | else | |
340 | return 0; | |
341 | } | |
342 | ||
343 | if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) | |
344 | return -EOPNOTSUPP; | |
345 | ||
346 | kprojid = make_kprojid(&init_user_ns, (projid_t)projid); | |
347 | ||
348 | if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) | |
349 | return 0; | |
350 | ||
9b7365fc | 351 | err = -EPERM; |
9b7365fc | 352 | /* Is it quota file? Do not allow user to mess with it */ |
02749a4c | 353 | if (ext4_is_quota_file(inode)) |
65dc3dd8 | 354 | return err; |
9b7365fc LX |
355 | |
356 | err = ext4_get_inode_loc(inode, &iloc); | |
357 | if (err) | |
65dc3dd8 | 358 | return err; |
9b7365fc LX |
359 | |
360 | raw_inode = ext4_raw_inode(&iloc); | |
361 | if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { | |
c03b45b8 MX |
362 | err = ext4_expand_extra_isize(inode, |
363 | EXT4_SB(sb)->s_want_extra_isize, | |
364 | &iloc); | |
365 | if (err) | |
65dc3dd8 | 366 | return err; |
c03b45b8 | 367 | } else { |
9b7365fc | 368 | brelse(iloc.bh); |
9b7365fc | 369 | } |
9b7365fc | 370 | |
d197b725 WS |
371 | err = dquot_initialize(inode); |
372 | if (err) | |
373 | return err; | |
9b7365fc LX |
374 | |
375 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, | |
376 | EXT4_QUOTA_INIT_BLOCKS(sb) + | |
377 | EXT4_QUOTA_DEL_BLOCKS(sb) + 3); | |
65dc3dd8 WS |
378 | if (IS_ERR(handle)) |
379 | return PTR_ERR(handle); | |
9b7365fc LX |
380 | |
381 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
382 | if (err) | |
383 | goto out_stop; | |
384 | ||
079788d0 WS |
385 | transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); |
386 | if (!IS_ERR(transfer_to[PRJQUOTA])) { | |
7a9ca53a TE |
387 | |
388 | /* __dquot_transfer() calls back ext4_get_inode_usage() which | |
389 | * counts xattr inode references. | |
390 | */ | |
391 | down_read(&EXT4_I(inode)->xattr_sem); | |
079788d0 | 392 | err = __dquot_transfer(inode, transfer_to); |
7a9ca53a | 393 | up_read(&EXT4_I(inode)->xattr_sem); |
079788d0 WS |
394 | dqput(transfer_to[PRJQUOTA]); |
395 | if (err) | |
396 | goto out_dirty; | |
9b7365fc | 397 | } |
079788d0 | 398 | |
9b7365fc | 399 | EXT4_I(inode)->i_projid = kprojid; |
eeca7ea1 | 400 | inode->i_ctime = current_time(inode); |
9b7365fc LX |
401 | out_dirty: |
402 | rc = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
403 | if (!err) | |
404 | err = rc; | |
405 | out_stop: | |
406 | ext4_journal_stop(handle); | |
9b7365fc LX |
407 | return err; |
408 | } | |
409 | #else | |
410 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
411 | { | |
412 | if (projid != EXT4_DEF_PROJID) | |
413 | return -EOPNOTSUPP; | |
414 | return 0; | |
415 | } | |
416 | #endif | |
417 | ||
418 | /* Transfer internal flags to xflags */ | |
419 | static inline __u32 ext4_iflags_to_xflags(unsigned long iflags) | |
420 | { | |
421 | __u32 xflags = 0; | |
422 | ||
423 | if (iflags & EXT4_SYNC_FL) | |
424 | xflags |= FS_XFLAG_SYNC; | |
425 | if (iflags & EXT4_IMMUTABLE_FL) | |
426 | xflags |= FS_XFLAG_IMMUTABLE; | |
427 | if (iflags & EXT4_APPEND_FL) | |
428 | xflags |= FS_XFLAG_APPEND; | |
429 | if (iflags & EXT4_NODUMP_FL) | |
430 | xflags |= FS_XFLAG_NODUMP; | |
431 | if (iflags & EXT4_NOATIME_FL) | |
432 | xflags |= FS_XFLAG_NOATIME; | |
433 | if (iflags & EXT4_PROJINHERIT_FL) | |
434 | xflags |= FS_XFLAG_PROJINHERIT; | |
435 | return xflags; | |
436 | } | |
437 | ||
d14e7683 JK |
438 | #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \ |
439 | FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \ | |
440 | FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT) | |
441 | ||
9b7365fc LX |
442 | /* Transfer xflags flags to internal */ |
443 | static inline unsigned long ext4_xflags_to_iflags(__u32 xflags) | |
444 | { | |
445 | unsigned long iflags = 0; | |
446 | ||
447 | if (xflags & FS_XFLAG_SYNC) | |
448 | iflags |= EXT4_SYNC_FL; | |
449 | if (xflags & FS_XFLAG_IMMUTABLE) | |
450 | iflags |= EXT4_IMMUTABLE_FL; | |
451 | if (xflags & FS_XFLAG_APPEND) | |
452 | iflags |= EXT4_APPEND_FL; | |
453 | if (xflags & FS_XFLAG_NODUMP) | |
454 | iflags |= EXT4_NODUMP_FL; | |
455 | if (xflags & FS_XFLAG_NOATIME) | |
456 | iflags |= EXT4_NOATIME_FL; | |
457 | if (xflags & FS_XFLAG_PROJINHERIT) | |
458 | iflags |= EXT4_PROJINHERIT_FL; | |
459 | ||
460 | return iflags; | |
461 | } | |
462 | ||
1a20a630 | 463 | static int ext4_shutdown(struct super_block *sb, unsigned long arg) |
783d9485 TT |
464 | { |
465 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
466 | __u32 flags; | |
467 | ||
468 | if (!capable(CAP_SYS_ADMIN)) | |
469 | return -EPERM; | |
470 | ||
471 | if (get_user(flags, (__u32 __user *)arg)) | |
472 | return -EFAULT; | |
473 | ||
474 | if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH) | |
475 | return -EINVAL; | |
476 | ||
477 | if (ext4_forced_shutdown(sbi)) | |
478 | return 0; | |
479 | ||
480 | ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags); | |
481 | ||
482 | switch (flags) { | |
483 | case EXT4_GOING_FLAGS_DEFAULT: | |
484 | freeze_bdev(sb->s_bdev); | |
485 | set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
486 | thaw_bdev(sb->s_bdev, sb); | |
487 | break; | |
488 | case EXT4_GOING_FLAGS_LOGFLUSH: | |
489 | set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
490 | if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) { | |
491 | (void) ext4_force_commit(sb); | |
73297f13 | 492 | jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); |
783d9485 TT |
493 | } |
494 | break; | |
495 | case EXT4_GOING_FLAGS_NOLOGFLUSH: | |
496 | set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
09439481 | 497 | if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) |
73297f13 | 498 | jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); |
783d9485 TT |
499 | break; |
500 | default: | |
501 | return -EINVAL; | |
502 | } | |
503 | clear_opt(sb, DISCARD); | |
504 | return 0; | |
505 | } | |
506 | ||
0c9ec4be DW |
507 | struct getfsmap_info { |
508 | struct super_block *gi_sb; | |
509 | struct fsmap_head __user *gi_data; | |
510 | unsigned int gi_idx; | |
511 | __u32 gi_last_flags; | |
512 | }; | |
513 | ||
514 | static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv) | |
515 | { | |
516 | struct getfsmap_info *info = priv; | |
517 | struct fsmap fm; | |
518 | ||
519 | trace_ext4_getfsmap_mapping(info->gi_sb, xfm); | |
520 | ||
521 | info->gi_last_flags = xfm->fmr_flags; | |
522 | ext4_fsmap_from_internal(info->gi_sb, &fm, xfm); | |
523 | if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm, | |
524 | sizeof(struct fsmap))) | |
525 | return -EFAULT; | |
526 | ||
527 | return 0; | |
528 | } | |
529 | ||
530 | static int ext4_ioc_getfsmap(struct super_block *sb, | |
531 | struct fsmap_head __user *arg) | |
532 | { | |
533 | struct getfsmap_info info = {0}; | |
534 | struct ext4_fsmap_head xhead = {0}; | |
535 | struct fsmap_head head; | |
536 | bool aborted = false; | |
537 | int error; | |
538 | ||
539 | if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) | |
540 | return -EFAULT; | |
541 | if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || | |
542 | memchr_inv(head.fmh_keys[0].fmr_reserved, 0, | |
543 | sizeof(head.fmh_keys[0].fmr_reserved)) || | |
544 | memchr_inv(head.fmh_keys[1].fmr_reserved, 0, | |
545 | sizeof(head.fmh_keys[1].fmr_reserved))) | |
546 | return -EINVAL; | |
547 | /* | |
548 | * ext4 doesn't report file extents at all, so the only valid | |
549 | * file offsets are the magic ones (all zeroes or all ones). | |
550 | */ | |
551 | if (head.fmh_keys[0].fmr_offset || | |
552 | (head.fmh_keys[1].fmr_offset != 0 && | |
553 | head.fmh_keys[1].fmr_offset != -1ULL)) | |
554 | return -EINVAL; | |
555 | ||
556 | xhead.fmh_iflags = head.fmh_iflags; | |
557 | xhead.fmh_count = head.fmh_count; | |
558 | ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]); | |
559 | ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]); | |
560 | ||
561 | trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]); | |
562 | trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]); | |
563 | ||
564 | info.gi_sb = sb; | |
565 | info.gi_data = arg; | |
566 | error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info); | |
567 | if (error == EXT4_QUERY_RANGE_ABORT) { | |
568 | error = 0; | |
569 | aborted = true; | |
570 | } else if (error) | |
571 | return error; | |
572 | ||
573 | /* If we didn't abort, set the "last" flag in the last fmx */ | |
574 | if (!aborted && info.gi_idx) { | |
575 | info.gi_last_flags |= FMR_OF_LAST; | |
576 | if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags, | |
577 | &info.gi_last_flags, | |
578 | sizeof(info.gi_last_flags))) | |
579 | return -EFAULT; | |
580 | } | |
581 | ||
582 | /* copy back header */ | |
583 | head.fmh_entries = xhead.fmh_entries; | |
584 | head.fmh_oflags = xhead.fmh_oflags; | |
585 | if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) | |
586 | return -EFAULT; | |
587 | ||
588 | return 0; | |
589 | } | |
590 | ||
65dc3dd8 WS |
591 | static int ext4_ioctl_check_project(struct inode *inode, struct fsxattr *fa) |
592 | { | |
593 | /* | |
594 | * Project Quota ID state is only allowed to change from within the init | |
595 | * namespace. Enforce that restriction only if we are trying to change | |
596 | * the quota ID state. Everything else is allowed in user namespaces. | |
597 | */ | |
598 | if (current_user_ns() == &init_user_ns) | |
599 | return 0; | |
600 | ||
601 | if (__kprojid_val(EXT4_I(inode)->i_projid) != fa->fsx_projid) | |
602 | return -EINVAL; | |
603 | ||
604 | if (ext4_test_inode_flag(inode, EXT4_INODE_PROJINHERIT)) { | |
605 | if (!(fa->fsx_xflags & FS_XFLAG_PROJINHERIT)) | |
606 | return -EINVAL; | |
607 | } else { | |
608 | if (fa->fsx_xflags & FS_XFLAG_PROJINHERIT) | |
609 | return -EINVAL; | |
610 | } | |
611 | ||
612 | return 0; | |
613 | } | |
614 | ||
5cdd7b2d | 615 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 616 | { |
496ad9aa | 617 | struct inode *inode = file_inode(filp); |
bab08ab9 | 618 | struct super_block *sb = inode->i_sb; |
617ba13b | 619 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 620 | unsigned int flags; |
ac27a0ec | 621 | |
af5bc92d | 622 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
623 | |
624 | switch (cmd) { | |
0c9ec4be DW |
625 | case FS_IOC_GETFSMAP: |
626 | return ext4_ioc_getfsmap(sb, (void __user *)arg); | |
617ba13b MC |
627 | case EXT4_IOC_GETFLAGS: |
628 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; | |
ac27a0ec | 629 | return put_user(flags, (int __user *) arg); |
617ba13b | 630 | case EXT4_IOC_SETFLAGS: { |
9b7365fc | 631 | int err; |
ac27a0ec | 632 | |
2e149670 | 633 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
634 | return -EACCES; |
635 | ||
636 | if (get_user(flags, (int __user *) arg)) | |
637 | return -EFAULT; | |
638 | ||
d14e7683 JK |
639 | if (flags & ~EXT4_FL_USER_VISIBLE) |
640 | return -EOPNOTSUPP; | |
641 | /* | |
642 | * chattr(1) grabs flags via GETFLAGS, modifies the result and | |
643 | * passes that to SETFLAGS. So we cannot easily make SETFLAGS | |
644 | * more restrictive than just silently masking off visible but | |
645 | * not settable flags as we always did. | |
646 | */ | |
647 | flags &= EXT4_FL_USER_MODIFIABLE; | |
648 | if (ext4_mask_flags(inode->i_mode, flags) != flags) | |
649 | return -EOPNOTSUPP; | |
650 | ||
a561be71 | 651 | err = mnt_want_write_file(filp); |
42a74f20 DH |
652 | if (err) |
653 | return err; | |
654 | ||
5955102c | 655 | inode_lock(inode); |
9b7365fc | 656 | err = ext4_ioctl_setflags(inode, flags); |
5955102c | 657 | inode_unlock(inode); |
2a79f17e | 658 | mnt_drop_write_file(filp); |
ac27a0ec DK |
659 | return err; |
660 | } | |
617ba13b MC |
661 | case EXT4_IOC_GETVERSION: |
662 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 663 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
664 | case EXT4_IOC_SETVERSION: |
665 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 666 | handle_t *handle; |
617ba13b | 667 | struct ext4_iloc iloc; |
ac27a0ec DK |
668 | __u32 generation; |
669 | int err; | |
670 | ||
2e149670 | 671 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 672 | return -EPERM; |
42a74f20 | 673 | |
9aa5d32b | 674 | if (ext4_has_metadata_csum(inode->i_sb)) { |
814525f4 DW |
675 | ext4_warning(sb, "Setting inode version is not " |
676 | "supported with metadata_csum enabled."); | |
677 | return -ENOTTY; | |
678 | } | |
679 | ||
a561be71 | 680 | err = mnt_want_write_file(filp); |
42a74f20 DH |
681 | if (err) |
682 | return err; | |
683 | if (get_user(generation, (int __user *) arg)) { | |
684 | err = -EFAULT; | |
685 | goto setversion_out; | |
686 | } | |
ac27a0ec | 687 | |
5955102c | 688 | inode_lock(inode); |
9924a92a | 689 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
690 | if (IS_ERR(handle)) { |
691 | err = PTR_ERR(handle); | |
6c2155b9 | 692 | goto unlock_out; |
42a74f20 | 693 | } |
617ba13b | 694 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 695 | if (err == 0) { |
eeca7ea1 | 696 | inode->i_ctime = current_time(inode); |
ac27a0ec | 697 | inode->i_generation = generation; |
617ba13b | 698 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 699 | } |
617ba13b | 700 | ext4_journal_stop(handle); |
6c2155b9 DH |
701 | |
702 | unlock_out: | |
5955102c | 703 | inode_unlock(inode); |
42a74f20 | 704 | setversion_out: |
2a79f17e | 705 | mnt_drop_write_file(filp); |
ac27a0ec DK |
706 | return err; |
707 | } | |
617ba13b MC |
708 | case EXT4_IOC_GROUP_EXTEND: { |
709 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 710 | int err, err2=0; |
ac27a0ec | 711 | |
8f82f840 YY |
712 | err = ext4_resize_begin(sb); |
713 | if (err) | |
714 | return err; | |
ac27a0ec | 715 | |
014a1770 DH |
716 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
717 | err = -EFAULT; | |
718 | goto group_extend_out; | |
719 | } | |
ac27a0ec | 720 | |
e2b911c5 | 721 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
722 | ext4_msg(sb, KERN_ERR, |
723 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
724 | err = -EOPNOTSUPP; |
725 | goto group_extend_out; | |
bab08ab9 TT |
726 | } |
727 | ||
a561be71 | 728 | err = mnt_want_write_file(filp); |
42a74f20 | 729 | if (err) |
014a1770 | 730 | goto group_extend_out; |
42a74f20 | 731 | |
617ba13b | 732 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
733 | if (EXT4_SB(sb)->s_journal) { |
734 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
735 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
736 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
737 | } | |
7ffe1ea8 HK |
738 | if (err == 0) |
739 | err = err2; | |
2a79f17e | 740 | mnt_drop_write_file(filp); |
014a1770 | 741 | group_extend_out: |
8f82f840 | 742 | ext4_resize_end(sb); |
ac27a0ec DK |
743 | return err; |
744 | } | |
748de673 AF |
745 | |
746 | case EXT4_IOC_MOVE_EXT: { | |
747 | struct move_extent me; | |
2903ff01 AV |
748 | struct fd donor; |
749 | int err; | |
748de673 | 750 | |
4a58579b AF |
751 | if (!(filp->f_mode & FMODE_READ) || |
752 | !(filp->f_mode & FMODE_WRITE)) | |
753 | return -EBADF; | |
754 | ||
748de673 AF |
755 | if (copy_from_user(&me, |
756 | (struct move_extent __user *)arg, sizeof(me))) | |
757 | return -EFAULT; | |
4a58579b | 758 | me.moved_len = 0; |
748de673 | 759 | |
2903ff01 AV |
760 | donor = fdget(me.donor_fd); |
761 | if (!donor.file) | |
748de673 AF |
762 | return -EBADF; |
763 | ||
2903ff01 | 764 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
765 | err = -EBADF; |
766 | goto mext_out; | |
748de673 AF |
767 | } |
768 | ||
e2b911c5 | 769 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
770 | ext4_msg(sb, KERN_ERR, |
771 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
772 | err = -EOPNOTSUPP; |
773 | goto mext_out; | |
73f34a5e RZ |
774 | } else if (IS_DAX(inode)) { |
775 | ext4_msg(sb, KERN_ERR, | |
776 | "Online defrag not supported with DAX"); | |
777 | err = -EOPNOTSUPP; | |
778 | goto mext_out; | |
bab08ab9 TT |
779 | } |
780 | ||
a561be71 | 781 | err = mnt_want_write_file(filp); |
4a58579b AF |
782 | if (err) |
783 | goto mext_out; | |
784 | ||
2903ff01 | 785 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 786 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 787 | mnt_drop_write_file(filp); |
748de673 | 788 | |
60e6679e | 789 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 790 | &me, sizeof(me))) |
4a58579b AF |
791 | err = -EFAULT; |
792 | mext_out: | |
2903ff01 | 793 | fdput(donor); |
748de673 AF |
794 | return err; |
795 | } | |
796 | ||
617ba13b MC |
797 | case EXT4_IOC_GROUP_ADD: { |
798 | struct ext4_new_group_data input; | |
ac046f1d | 799 | int err, err2=0; |
ac27a0ec | 800 | |
8f82f840 YY |
801 | err = ext4_resize_begin(sb); |
802 | if (err) | |
803 | return err; | |
ac27a0ec | 804 | |
617ba13b | 805 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
014a1770 DH |
806 | sizeof(input))) { |
807 | err = -EFAULT; | |
808 | goto group_add_out; | |
809 | } | |
ac27a0ec | 810 | |
e2b911c5 | 811 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
812 | ext4_msg(sb, KERN_ERR, |
813 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
814 | err = -EOPNOTSUPP; |
815 | goto group_add_out; | |
bab08ab9 TT |
816 | } |
817 | ||
a561be71 | 818 | err = mnt_want_write_file(filp); |
42a74f20 | 819 | if (err) |
014a1770 | 820 | goto group_add_out; |
42a74f20 | 821 | |
617ba13b | 822 | err = ext4_group_add(sb, &input); |
ac046f1d PT |
823 | if (EXT4_SB(sb)->s_journal) { |
824 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
825 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
826 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
827 | } | |
7ffe1ea8 HK |
828 | if (err == 0) |
829 | err = err2; | |
2a79f17e | 830 | mnt_drop_write_file(filp); |
7f511862 TT |
831 | if (!err && ext4_has_group_desc_csum(sb) && |
832 | test_opt(sb, INIT_INODE_TABLE)) | |
833 | err = ext4_register_li_request(sb, input.group); | |
014a1770 | 834 | group_add_out: |
8f82f840 | 835 | ext4_resize_end(sb); |
ac27a0ec DK |
836 | return err; |
837 | } | |
838 | ||
c14c6fd5 | 839 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
840 | { |
841 | int err; | |
2e149670 | 842 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
843 | return -EACCES; |
844 | ||
a561be71 | 845 | err = mnt_want_write_file(filp); |
2a43a878 AK |
846 | if (err) |
847 | return err; | |
848 | /* | |
849 | * inode_mutex prevent write and truncate on the file. | |
850 | * Read still goes through. We take i_data_sem in | |
851 | * ext4_ext_swap_inode_data before we switch the | |
852 | * inode format to prevent read. | |
853 | */ | |
5955102c | 854 | inode_lock((inode)); |
2a43a878 | 855 | err = ext4_ext_migrate(inode); |
5955102c | 856 | inode_unlock((inode)); |
2a79f17e | 857 | mnt_drop_write_file(filp); |
2a43a878 AK |
858 | return err; |
859 | } | |
c14c6fd5 | 860 | |
ccd2506b TT |
861 | case EXT4_IOC_ALLOC_DA_BLKS: |
862 | { | |
863 | int err; | |
2e149670 | 864 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
865 | return -EACCES; |
866 | ||
a561be71 | 867 | err = mnt_want_write_file(filp); |
ccd2506b TT |
868 | if (err) |
869 | return err; | |
870 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 871 | mnt_drop_write_file(filp); |
ccd2506b TT |
872 | return err; |
873 | } | |
874 | ||
393d1d1d | 875 | case EXT4_IOC_SWAP_BOOT: |
3e67cfad DM |
876 | { |
877 | int err; | |
393d1d1d DTB |
878 | if (!(filp->f_mode & FMODE_WRITE)) |
879 | return -EBADF; | |
3e67cfad DM |
880 | err = mnt_want_write_file(filp); |
881 | if (err) | |
882 | return err; | |
883 | err = swap_inode_boot_loader(sb, inode); | |
884 | mnt_drop_write_file(filp); | |
885 | return err; | |
886 | } | |
393d1d1d | 887 | |
19c5246d YY |
888 | case EXT4_IOC_RESIZE_FS: { |
889 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 890 | int err = 0, err2 = 0; |
7f511862 | 891 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d | 892 | |
e2b911c5 | 893 | if (ext4_has_feature_bigalloc(sb)) { |
19c5246d YY |
894 | ext4_msg(sb, KERN_ERR, |
895 | "Online resizing not (yet) supported with bigalloc"); | |
896 | return -EOPNOTSUPP; | |
897 | } | |
898 | ||
19c5246d YY |
899 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
900 | sizeof(__u64))) { | |
901 | return -EFAULT; | |
902 | } | |
903 | ||
19c5246d YY |
904 | err = ext4_resize_begin(sb); |
905 | if (err) | |
906 | return err; | |
907 | ||
8cae6f71 | 908 | err = mnt_want_write_file(filp); |
19c5246d YY |
909 | if (err) |
910 | goto resizefs_out; | |
911 | ||
912 | err = ext4_resize_fs(sb, n_blocks_count); | |
913 | if (EXT4_SB(sb)->s_journal) { | |
914 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
915 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
916 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
917 | } | |
918 | if (err == 0) | |
919 | err = err2; | |
8cae6f71 | 920 | mnt_drop_write_file(filp); |
7f511862 TT |
921 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
922 | ext4_has_group_desc_csum(sb) && | |
923 | test_opt(sb, INIT_INODE_TABLE)) | |
924 | err = ext4_register_li_request(sb, o_group); | |
925 | ||
19c5246d YY |
926 | resizefs_out: |
927 | ext4_resize_end(sb); | |
928 | return err; | |
929 | } | |
930 | ||
e681c047 LC |
931 | case FITRIM: |
932 | { | |
41431792 | 933 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
e681c047 LC |
934 | struct fstrim_range range; |
935 | int ret = 0; | |
936 | ||
937 | if (!capable(CAP_SYS_ADMIN)) | |
938 | return -EPERM; | |
939 | ||
41431792 LC |
940 | if (!blk_queue_discard(q)) |
941 | return -EOPNOTSUPP; | |
942 | ||
6fee657d DW |
943 | /* |
944 | * We haven't replayed the journal, so we cannot use our | |
945 | * block-bitmap-guided storage zapping commands. | |
946 | */ | |
947 | if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) | |
948 | return -EROFS; | |
949 | ||
e6705f7c | 950 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
951 | sizeof(range))) |
952 | return -EFAULT; | |
953 | ||
5c2ed62f LC |
954 | range.minlen = max((unsigned int)range.minlen, |
955 | q->limits.discard_granularity); | |
e681c047 LC |
956 | ret = ext4_trim_fs(sb, &range); |
957 | if (ret < 0) | |
958 | return ret; | |
959 | ||
e6705f7c | 960 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
961 | sizeof(range))) |
962 | return -EFAULT; | |
963 | ||
964 | return 0; | |
965 | } | |
7869a4a6 TT |
966 | case EXT4_IOC_PRECACHE_EXTENTS: |
967 | return ext4_ext_precache(inode); | |
9bd8212f | 968 | |
db717d8e | 969 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
9a200d07 RW |
970 | if (!ext4_has_feature_encrypt(sb)) |
971 | return -EOPNOTSUPP; | |
db717d8e | 972 | return fscrypt_ioctl_set_policy(filp, (const void __user *)arg); |
9a200d07 | 973 | |
9bd8212f | 974 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: { |
ba679017 | 975 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
9bd8212f MH |
976 | int err, err2; |
977 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
978 | handle_t *handle; | |
979 | ||
35997d1c | 980 | if (!ext4_has_feature_encrypt(sb)) |
9bd8212f MH |
981 | return -EOPNOTSUPP; |
982 | if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { | |
983 | err = mnt_want_write_file(filp); | |
984 | if (err) | |
985 | return err; | |
986 | handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); | |
987 | if (IS_ERR(handle)) { | |
988 | err = PTR_ERR(handle); | |
989 | goto pwsalt_err_exit; | |
990 | } | |
991 | err = ext4_journal_get_write_access(handle, sbi->s_sbh); | |
992 | if (err) | |
993 | goto pwsalt_err_journal; | |
994 | generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); | |
995 | err = ext4_handle_dirty_metadata(handle, NULL, | |
996 | sbi->s_sbh); | |
997 | pwsalt_err_journal: | |
998 | err2 = ext4_journal_stop(handle); | |
999 | if (err2 && !err) | |
1000 | err = err2; | |
1001 | pwsalt_err_exit: | |
1002 | mnt_drop_write_file(filp); | |
1003 | if (err) | |
1004 | return err; | |
1005 | } | |
b4ab9e29 FF |
1006 | if (copy_to_user((void __user *) arg, |
1007 | sbi->s_es->s_encrypt_pw_salt, 16)) | |
9bd8212f MH |
1008 | return -EFAULT; |
1009 | return 0; | |
ba679017 EB |
1010 | #else |
1011 | return -EOPNOTSUPP; | |
1012 | #endif | |
9bd8212f | 1013 | } |
db717d8e EB |
1014 | case EXT4_IOC_GET_ENCRYPTION_POLICY: |
1015 | return fscrypt_ioctl_get_policy(filp, (void __user *)arg); | |
9bd8212f | 1016 | |
9b7365fc LX |
1017 | case EXT4_IOC_FSGETXATTR: |
1018 | { | |
1019 | struct fsxattr fa; | |
1020 | ||
1021 | memset(&fa, 0, sizeof(struct fsxattr)); | |
9b7365fc LX |
1022 | fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE); |
1023 | ||
0b7b7779 | 1024 | if (ext4_has_feature_project(inode->i_sb)) { |
9b7365fc LX |
1025 | fa.fsx_projid = (__u32)from_kprojid(&init_user_ns, |
1026 | EXT4_I(inode)->i_projid); | |
1027 | } | |
1028 | ||
1029 | if (copy_to_user((struct fsxattr __user *)arg, | |
1030 | &fa, sizeof(fa))) | |
1031 | return -EFAULT; | |
1032 | return 0; | |
1033 | } | |
1034 | case EXT4_IOC_FSSETXATTR: | |
1035 | { | |
1036 | struct fsxattr fa; | |
1037 | int err; | |
1038 | ||
1039 | if (copy_from_user(&fa, (struct fsxattr __user *)arg, | |
1040 | sizeof(fa))) | |
1041 | return -EFAULT; | |
1042 | ||
1043 | /* Make sure caller has proper permission */ | |
1044 | if (!inode_owner_or_capable(inode)) | |
1045 | return -EACCES; | |
1046 | ||
d14e7683 JK |
1047 | if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS) |
1048 | return -EOPNOTSUPP; | |
1049 | ||
1050 | flags = ext4_xflags_to_iflags(fa.fsx_xflags); | |
1051 | if (ext4_mask_flags(inode->i_mode, flags) != flags) | |
1052 | return -EOPNOTSUPP; | |
1053 | ||
9b7365fc LX |
1054 | err = mnt_want_write_file(filp); |
1055 | if (err) | |
1056 | return err; | |
1057 | ||
5955102c | 1058 | inode_lock(inode); |
65dc3dd8 WS |
1059 | err = ext4_ioctl_check_project(inode, &fa); |
1060 | if (err) | |
1061 | goto out; | |
9b7365fc LX |
1062 | flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) | |
1063 | (flags & EXT4_FL_XFLAG_VISIBLE); | |
1064 | err = ext4_ioctl_setflags(inode, flags); | |
9b7365fc | 1065 | if (err) |
65dc3dd8 | 1066 | goto out; |
9b7365fc | 1067 | err = ext4_ioctl_setproject(filp, fa.fsx_projid); |
65dc3dd8 WS |
1068 | out: |
1069 | inode_unlock(inode); | |
1070 | mnt_drop_write_file(filp); | |
1071 | return err; | |
9b7365fc | 1072 | } |
e9be2ac7 TT |
1073 | case EXT4_IOC_SHUTDOWN: |
1074 | return ext4_shutdown(sb, arg); | |
ac27a0ec DK |
1075 | default: |
1076 | return -ENOTTY; | |
1077 | } | |
1078 | } | |
1079 | ||
1080 | #ifdef CONFIG_COMPAT | |
617ba13b | 1081 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 1082 | { |
ac27a0ec DK |
1083 | /* These are just misnamed, they actually get/put from/to user an int */ |
1084 | switch (cmd) { | |
617ba13b MC |
1085 | case EXT4_IOC32_GETFLAGS: |
1086 | cmd = EXT4_IOC_GETFLAGS; | |
ac27a0ec | 1087 | break; |
617ba13b MC |
1088 | case EXT4_IOC32_SETFLAGS: |
1089 | cmd = EXT4_IOC_SETFLAGS; | |
ac27a0ec | 1090 | break; |
617ba13b MC |
1091 | case EXT4_IOC32_GETVERSION: |
1092 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 1093 | break; |
617ba13b MC |
1094 | case EXT4_IOC32_SETVERSION: |
1095 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 1096 | break; |
617ba13b MC |
1097 | case EXT4_IOC32_GROUP_EXTEND: |
1098 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 1099 | break; |
617ba13b MC |
1100 | case EXT4_IOC32_GETVERSION_OLD: |
1101 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 1102 | break; |
617ba13b MC |
1103 | case EXT4_IOC32_SETVERSION_OLD: |
1104 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 1105 | break; |
617ba13b MC |
1106 | case EXT4_IOC32_GETRSVSZ: |
1107 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 1108 | break; |
617ba13b MC |
1109 | case EXT4_IOC32_SETRSVSZ: |
1110 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 1111 | break; |
4d92dc0f BH |
1112 | case EXT4_IOC32_GROUP_ADD: { |
1113 | struct compat_ext4_new_group_input __user *uinput; | |
1114 | struct ext4_new_group_input input; | |
1115 | mm_segment_t old_fs; | |
1116 | int err; | |
1117 | ||
1118 | uinput = compat_ptr(arg); | |
1119 | err = get_user(input.group, &uinput->group); | |
1120 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
1121 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
1122 | err |= get_user(input.inode_table, &uinput->inode_table); | |
1123 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
1124 | err |= get_user(input.reserved_blocks, | |
1125 | &uinput->reserved_blocks); | |
1126 | if (err) | |
1127 | return -EFAULT; | |
1128 | old_fs = get_fs(); | |
1129 | set_fs(KERNEL_DS); | |
1130 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, | |
1131 | (unsigned long) &input); | |
1132 | set_fs(old_fs); | |
1133 | return err; | |
1134 | } | |
b684b2ee | 1135 | case EXT4_IOC_MOVE_EXT: |
19c5246d | 1136 | case EXT4_IOC_RESIZE_FS: |
7869a4a6 | 1137 | case EXT4_IOC_PRECACHE_EXTENTS: |
9bd8212f MH |
1138 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
1139 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: | |
1140 | case EXT4_IOC_GET_ENCRYPTION_POLICY: | |
e9be2ac7 | 1141 | case EXT4_IOC_SHUTDOWN: |
0c9ec4be | 1142 | case FS_IOC_GETFSMAP: |
b684b2ee | 1143 | break; |
ac27a0ec DK |
1144 | default: |
1145 | return -ENOIOCTLCMD; | |
1146 | } | |
5cdd7b2d | 1147 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
1148 | } |
1149 | #endif |