Commit | Line | Data |
---|---|---|
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> |
23253068 | 18 | #include <linux/random.h> |
8da4b8c4 | 19 | #include <linux/uuid.h> |
7c0f6ba6 | 20 | #include <linux/uaccess.h> |
783d9485 | 21 | #include <linux/delay.h> |
ee73f9a5 | 22 | #include <linux/iversion.h> |
3dcf5451 CH |
23 | #include "ext4_jbd2.h" |
24 | #include "ext4.h" | |
0c9ec4be DW |
25 | #include <linux/fsmap.h> |
26 | #include "fsmap.h" | |
27 | #include <trace/events/ext4.h> | |
ac27a0ec | 28 | |
393d1d1d DTB |
29 | /** |
30 | * Swap memory between @a and @b for @len bytes. | |
31 | * | |
32 | * @a: pointer to first memory area | |
33 | * @b: pointer to second memory area | |
34 | * @len: number of bytes to swap | |
35 | * | |
36 | */ | |
37 | static void memswap(void *a, void *b, size_t len) | |
38 | { | |
39 | unsigned char *ap, *bp; | |
393d1d1d DTB |
40 | |
41 | ap = (unsigned char *)a; | |
42 | bp = (unsigned char *)b; | |
43 | while (len-- > 0) { | |
4b7e2db5 | 44 | swap(*ap, *bp); |
393d1d1d DTB |
45 | ap++; |
46 | bp++; | |
47 | } | |
48 | } | |
49 | ||
50 | /** | |
51 | * Swap i_data and associated attributes between @inode1 and @inode2. | |
52 | * This function is used for the primary swap between inode1 and inode2 | |
53 | * and also to revert this primary swap in case of errors. | |
54 | * | |
55 | * Therefore you have to make sure, that calling this method twice | |
56 | * will revert all changes. | |
57 | * | |
58 | * @inode1: pointer to first inode | |
59 | * @inode2: pointer to second inode | |
60 | */ | |
61 | static void swap_inode_data(struct inode *inode1, struct inode *inode2) | |
62 | { | |
63 | loff_t isize; | |
64 | struct ext4_inode_info *ei1; | |
65 | struct ext4_inode_info *ei2; | |
66 | ||
67 | ei1 = EXT4_I(inode1); | |
68 | ei2 = EXT4_I(inode2); | |
69 | ||
9c5d58fb JL |
70 | swap(inode1->i_flags, inode2->i_flags); |
71 | swap(inode1->i_version, inode2->i_version); | |
72 | swap(inode1->i_blocks, inode2->i_blocks); | |
73 | swap(inode1->i_bytes, inode2->i_bytes); | |
74 | swap(inode1->i_atime, inode2->i_atime); | |
75 | swap(inode1->i_mtime, inode2->i_mtime); | |
393d1d1d DTB |
76 | |
77 | memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); | |
9c5d58fb JL |
78 | swap(ei1->i_flags, ei2->i_flags); |
79 | swap(ei1->i_disksize, ei2->i_disksize); | |
cde2d7a7 TT |
80 | ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); |
81 | ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); | |
393d1d1d DTB |
82 | |
83 | isize = i_size_read(inode1); | |
84 | i_size_write(inode1, i_size_read(inode2)); | |
85 | i_size_write(inode2, isize); | |
86 | } | |
87 | ||
88 | /** | |
89 | * Swap the information from the given @inode and the inode | |
90 | * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other | |
91 | * important fields of the inodes. | |
92 | * | |
93 | * @sb: the super block of the filesystem | |
94 | * @inode: the inode to swap with EXT4_BOOT_LOADER_INO | |
95 | * | |
96 | */ | |
97 | static long swap_inode_boot_loader(struct super_block *sb, | |
98 | struct inode *inode) | |
99 | { | |
100 | handle_t *handle; | |
101 | int err; | |
102 | struct inode *inode_bl; | |
393d1d1d | 103 | struct ext4_inode_info *ei_bl; |
393d1d1d | 104 | |
d8558a29 TT |
105 | if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) |
106 | return -EINVAL; | |
393d1d1d | 107 | |
d8558a29 TT |
108 | if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) |
109 | return -EPERM; | |
393d1d1d | 110 | |
393d1d1d | 111 | inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); |
d8558a29 TT |
112 | if (IS_ERR(inode_bl)) |
113 | return PTR_ERR(inode_bl); | |
393d1d1d DTB |
114 | ei_bl = EXT4_I(inode_bl); |
115 | ||
116 | filemap_flush(inode->i_mapping); | |
117 | filemap_flush(inode_bl->i_mapping); | |
118 | ||
119 | /* Protect orig inodes against a truncate and make sure, | |
120 | * that only 1 swap_inode_boot_loader is running. */ | |
375e289e | 121 | lock_two_nondirectories(inode, inode_bl); |
393d1d1d DTB |
122 | |
123 | truncate_inode_pages(&inode->i_data, 0); | |
124 | truncate_inode_pages(&inode_bl->i_data, 0); | |
125 | ||
126 | /* Wait for all existing dio workers */ | |
393d1d1d DTB |
127 | inode_dio_wait(inode); |
128 | inode_dio_wait(inode_bl); | |
129 | ||
130 | handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); | |
131 | if (IS_ERR(handle)) { | |
132 | err = -EINVAL; | |
30d29b11 | 133 | goto journal_err_out; |
393d1d1d DTB |
134 | } |
135 | ||
136 | /* Protect extent tree against block allocations via delalloc */ | |
137 | ext4_double_down_write_data_sem(inode, inode_bl); | |
138 | ||
139 | if (inode_bl->i_nlink == 0) { | |
140 | /* this inode has never been used as a BOOT_LOADER */ | |
141 | set_nlink(inode_bl, 1); | |
142 | i_uid_write(inode_bl, 0); | |
143 | i_gid_write(inode_bl, 0); | |
144 | inode_bl->i_flags = 0; | |
145 | ei_bl->i_flags = 0; | |
ee73f9a5 | 146 | inode_set_iversion(inode_bl, 1); |
393d1d1d DTB |
147 | i_size_write(inode_bl, 0); |
148 | inode_bl->i_mode = S_IFREG; | |
e2b911c5 | 149 | if (ext4_has_feature_extents(sb)) { |
393d1d1d DTB |
150 | ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); |
151 | ext4_ext_tree_init(handle, inode_bl); | |
152 | } else | |
153 | memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); | |
154 | } | |
155 | ||
156 | swap_inode_data(inode, inode_bl); | |
157 | ||
eeca7ea1 | 158 | inode->i_ctime = inode_bl->i_ctime = current_time(inode); |
393d1d1d | 159 | |
23253068 TT |
160 | inode->i_generation = prandom_u32(); |
161 | inode_bl->i_generation = prandom_u32(); | |
393d1d1d DTB |
162 | |
163 | ext4_discard_preallocations(inode); | |
164 | ||
165 | err = ext4_mark_inode_dirty(handle, inode); | |
166 | if (err < 0) { | |
167 | ext4_warning(inode->i_sb, | |
168 | "couldn't mark inode #%lu dirty (err %d)", | |
169 | inode->i_ino, err); | |
170 | /* Revert all changes: */ | |
171 | swap_inode_data(inode, inode_bl); | |
172 | } else { | |
173 | err = ext4_mark_inode_dirty(handle, inode_bl); | |
174 | if (err < 0) { | |
175 | ext4_warning(inode_bl->i_sb, | |
176 | "couldn't mark inode #%lu dirty (err %d)", | |
177 | inode_bl->i_ino, err); | |
178 | /* Revert all changes: */ | |
179 | swap_inode_data(inode, inode_bl); | |
180 | ext4_mark_inode_dirty(handle, inode); | |
181 | } | |
182 | } | |
393d1d1d | 183 | ext4_journal_stop(handle); |
393d1d1d DTB |
184 | ext4_double_up_write_data_sem(inode, inode_bl); |
185 | ||
30d29b11 | 186 | journal_err_out: |
375e289e | 187 | unlock_two_nondirectories(inode, inode_bl); |
393d1d1d | 188 | iput(inode_bl); |
393d1d1d DTB |
189 | return err; |
190 | } | |
191 | ||
ba679017 | 192 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
9bd8212f MH |
193 | static int uuid_is_zero(__u8 u[16]) |
194 | { | |
195 | int i; | |
196 | ||
197 | for (i = 0; i < 16; i++) | |
198 | if (u[i]) | |
199 | return 0; | |
200 | return 1; | |
201 | } | |
ba679017 | 202 | #endif |
9bd8212f | 203 | |
9b7365fc LX |
204 | static int ext4_ioctl_setflags(struct inode *inode, |
205 | unsigned int flags) | |
206 | { | |
207 | struct ext4_inode_info *ei = EXT4_I(inode); | |
208 | handle_t *handle = NULL; | |
fdde368e | 209 | int err = -EPERM, migrate = 0; |
9b7365fc LX |
210 | struct ext4_iloc iloc; |
211 | unsigned int oldflags, mask, i; | |
212 | unsigned int jflag; | |
213 | ||
214 | /* Is it quota file? Do not allow user to mess with it */ | |
02749a4c | 215 | if (ext4_is_quota_file(inode)) |
9b7365fc LX |
216 | goto flags_out; |
217 | ||
218 | oldflags = ei->i_flags; | |
219 | ||
220 | /* The JOURNAL_DATA flag is modifiable only by root */ | |
221 | jflag = flags & EXT4_JOURNAL_DATA_FL; | |
222 | ||
223 | /* | |
224 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
225 | * the relevant capability. | |
226 | * | |
227 | * This test looks nicer. Thanks to Pauline Middelink | |
228 | */ | |
229 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { | |
230 | if (!capable(CAP_LINUX_IMMUTABLE)) | |
231 | goto flags_out; | |
232 | } | |
233 | ||
234 | /* | |
235 | * The JOURNAL_DATA flag can only be changed by | |
236 | * the relevant capability. | |
237 | */ | |
238 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { | |
239 | if (!capable(CAP_SYS_RESOURCE)) | |
240 | goto flags_out; | |
241 | } | |
242 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) | |
243 | migrate = 1; | |
244 | ||
245 | if (flags & EXT4_EOFBLOCKS_FL) { | |
246 | /* we don't support adding EOFBLOCKS flag */ | |
247 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { | |
248 | err = -EOPNOTSUPP; | |
249 | goto flags_out; | |
250 | } | |
2c98eb5e TT |
251 | } else if (oldflags & EXT4_EOFBLOCKS_FL) { |
252 | err = ext4_truncate(inode); | |
253 | if (err) | |
254 | goto flags_out; | |
255 | } | |
9b7365fc LX |
256 | |
257 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); | |
258 | if (IS_ERR(handle)) { | |
259 | err = PTR_ERR(handle); | |
260 | goto flags_out; | |
261 | } | |
262 | if (IS_SYNC(inode)) | |
263 | ext4_handle_sync(handle); | |
264 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
265 | if (err) | |
266 | goto flags_err; | |
267 | ||
268 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { | |
269 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
270 | continue; | |
f8011d93 JK |
271 | /* These flags get special treatment later */ |
272 | if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL) | |
273 | continue; | |
9b7365fc LX |
274 | if (mask & flags) |
275 | ext4_set_inode_flag(inode, i); | |
276 | else | |
277 | ext4_clear_inode_flag(inode, i); | |
278 | } | |
279 | ||
280 | ext4_set_inode_flags(inode); | |
eeca7ea1 | 281 | inode->i_ctime = current_time(inode); |
9b7365fc LX |
282 | |
283 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
284 | flags_err: | |
285 | ext4_journal_stop(handle); | |
286 | if (err) | |
287 | goto flags_out; | |
288 | ||
e9072d85 RZ |
289 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { |
290 | /* | |
291 | * Changes to the journaling mode can cause unsafe changes to | |
292 | * S_DAX if we are using the DAX mount option. | |
293 | */ | |
294 | if (test_opt(inode->i_sb, DAX)) { | |
295 | err = -EBUSY; | |
296 | goto flags_out; | |
297 | } | |
298 | ||
9b7365fc | 299 | err = ext4_change_inode_journal_flag(inode, jflag); |
e9072d85 RZ |
300 | if (err) |
301 | goto flags_out; | |
302 | } | |
9b7365fc LX |
303 | if (migrate) { |
304 | if (flags & EXT4_EXTENTS_FL) | |
305 | err = ext4_ext_migrate(inode); | |
306 | else | |
307 | err = ext4_ind_migrate(inode); | |
308 | } | |
309 | ||
310 | flags_out: | |
311 | return err; | |
312 | } | |
313 | ||
314 | #ifdef CONFIG_QUOTA | |
315 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
316 | { | |
317 | struct inode *inode = file_inode(filp); | |
318 | struct super_block *sb = inode->i_sb; | |
319 | struct ext4_inode_info *ei = EXT4_I(inode); | |
320 | int err, rc; | |
321 | handle_t *handle; | |
322 | kprojid_t kprojid; | |
323 | struct ext4_iloc iloc; | |
324 | struct ext4_inode *raw_inode; | |
079788d0 | 325 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
9b7365fc | 326 | |
0b7b7779 | 327 | if (!ext4_has_feature_project(sb)) { |
9b7365fc LX |
328 | if (projid != EXT4_DEF_PROJID) |
329 | return -EOPNOTSUPP; | |
330 | else | |
331 | return 0; | |
332 | } | |
333 | ||
334 | if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) | |
335 | return -EOPNOTSUPP; | |
336 | ||
337 | kprojid = make_kprojid(&init_user_ns, (projid_t)projid); | |
338 | ||
339 | if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) | |
340 | return 0; | |
341 | ||
342 | err = mnt_want_write_file(filp); | |
343 | if (err) | |
344 | return err; | |
345 | ||
346 | err = -EPERM; | |
5955102c | 347 | inode_lock(inode); |
9b7365fc | 348 | /* Is it quota file? Do not allow user to mess with it */ |
02749a4c | 349 | if (ext4_is_quota_file(inode)) |
9b7365fc LX |
350 | goto out_unlock; |
351 | ||
352 | err = ext4_get_inode_loc(inode, &iloc); | |
353 | if (err) | |
354 | goto out_unlock; | |
355 | ||
356 | raw_inode = ext4_raw_inode(&iloc); | |
357 | if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { | |
c03b45b8 MX |
358 | err = ext4_expand_extra_isize(inode, |
359 | EXT4_SB(sb)->s_want_extra_isize, | |
360 | &iloc); | |
361 | if (err) | |
362 | goto out_unlock; | |
363 | } else { | |
9b7365fc | 364 | brelse(iloc.bh); |
9b7365fc | 365 | } |
9b7365fc LX |
366 | |
367 | dquot_initialize(inode); | |
368 | ||
369 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, | |
370 | EXT4_QUOTA_INIT_BLOCKS(sb) + | |
371 | EXT4_QUOTA_DEL_BLOCKS(sb) + 3); | |
372 | if (IS_ERR(handle)) { | |
373 | err = PTR_ERR(handle); | |
374 | goto out_unlock; | |
375 | } | |
376 | ||
377 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
378 | if (err) | |
379 | goto out_stop; | |
380 | ||
079788d0 WS |
381 | transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); |
382 | if (!IS_ERR(transfer_to[PRJQUOTA])) { | |
7a9ca53a TE |
383 | |
384 | /* __dquot_transfer() calls back ext4_get_inode_usage() which | |
385 | * counts xattr inode references. | |
386 | */ | |
387 | down_read(&EXT4_I(inode)->xattr_sem); | |
079788d0 | 388 | err = __dquot_transfer(inode, transfer_to); |
7a9ca53a | 389 | up_read(&EXT4_I(inode)->xattr_sem); |
079788d0 WS |
390 | dqput(transfer_to[PRJQUOTA]); |
391 | if (err) | |
392 | goto out_dirty; | |
9b7365fc | 393 | } |
079788d0 | 394 | |
9b7365fc | 395 | EXT4_I(inode)->i_projid = kprojid; |
eeca7ea1 | 396 | inode->i_ctime = current_time(inode); |
9b7365fc LX |
397 | out_dirty: |
398 | rc = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
399 | if (!err) | |
400 | err = rc; | |
401 | out_stop: | |
402 | ext4_journal_stop(handle); | |
403 | out_unlock: | |
5955102c | 404 | inode_unlock(inode); |
9b7365fc LX |
405 | mnt_drop_write_file(filp); |
406 | return err; | |
407 | } | |
408 | #else | |
409 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
410 | { | |
411 | if (projid != EXT4_DEF_PROJID) | |
412 | return -EOPNOTSUPP; | |
413 | return 0; | |
414 | } | |
415 | #endif | |
416 | ||
417 | /* Transfer internal flags to xflags */ | |
418 | static inline __u32 ext4_iflags_to_xflags(unsigned long iflags) | |
419 | { | |
420 | __u32 xflags = 0; | |
421 | ||
422 | if (iflags & EXT4_SYNC_FL) | |
423 | xflags |= FS_XFLAG_SYNC; | |
424 | if (iflags & EXT4_IMMUTABLE_FL) | |
425 | xflags |= FS_XFLAG_IMMUTABLE; | |
426 | if (iflags & EXT4_APPEND_FL) | |
427 | xflags |= FS_XFLAG_APPEND; | |
428 | if (iflags & EXT4_NODUMP_FL) | |
429 | xflags |= FS_XFLAG_NODUMP; | |
430 | if (iflags & EXT4_NOATIME_FL) | |
431 | xflags |= FS_XFLAG_NOATIME; | |
432 | if (iflags & EXT4_PROJINHERIT_FL) | |
433 | xflags |= FS_XFLAG_PROJINHERIT; | |
434 | return xflags; | |
435 | } | |
436 | ||
d14e7683 JK |
437 | #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \ |
438 | FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \ | |
439 | FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT) | |
440 | ||
9b7365fc LX |
441 | /* Transfer xflags flags to internal */ |
442 | static inline unsigned long ext4_xflags_to_iflags(__u32 xflags) | |
443 | { | |
444 | unsigned long iflags = 0; | |
445 | ||
446 | if (xflags & FS_XFLAG_SYNC) | |
447 | iflags |= EXT4_SYNC_FL; | |
448 | if (xflags & FS_XFLAG_IMMUTABLE) | |
449 | iflags |= EXT4_IMMUTABLE_FL; | |
450 | if (xflags & FS_XFLAG_APPEND) | |
451 | iflags |= EXT4_APPEND_FL; | |
452 | if (xflags & FS_XFLAG_NODUMP) | |
453 | iflags |= EXT4_NODUMP_FL; | |
454 | if (xflags & FS_XFLAG_NOATIME) | |
455 | iflags |= EXT4_NOATIME_FL; | |
456 | if (xflags & FS_XFLAG_PROJINHERIT) | |
457 | iflags |= EXT4_PROJINHERIT_FL; | |
458 | ||
459 | return iflags; | |
460 | } | |
461 | ||
1a20a630 | 462 | static int ext4_shutdown(struct super_block *sb, unsigned long arg) |
783d9485 TT |
463 | { |
464 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
465 | __u32 flags; | |
466 | ||
467 | if (!capable(CAP_SYS_ADMIN)) | |
468 | return -EPERM; | |
469 | ||
470 | if (get_user(flags, (__u32 __user *)arg)) | |
471 | return -EFAULT; | |
472 | ||
473 | if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH) | |
474 | return -EINVAL; | |
475 | ||
476 | if (ext4_forced_shutdown(sbi)) | |
477 | return 0; | |
478 | ||
479 | ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags); | |
ccf0f32a | 480 | trace_ext4_shutdown(sb, flags); |
783d9485 TT |
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); | |
fb7c0244 | 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); | |
a6d9946b | 497 | if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) |
fb7c0244 | 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 | ||
e145b35b AV |
591 | static long ext4_ioctl_group_add(struct file *file, |
592 | struct ext4_new_group_data *input) | |
593 | { | |
594 | struct super_block *sb = file_inode(file)->i_sb; | |
595 | int err, err2=0; | |
596 | ||
597 | err = ext4_resize_begin(sb); | |
598 | if (err) | |
599 | return err; | |
600 | ||
601 | if (ext4_has_feature_bigalloc(sb)) { | |
602 | ext4_msg(sb, KERN_ERR, | |
603 | "Online resizing not supported with bigalloc"); | |
604 | err = -EOPNOTSUPP; | |
605 | goto group_add_out; | |
606 | } | |
607 | ||
608 | err = mnt_want_write_file(file); | |
609 | if (err) | |
610 | goto group_add_out; | |
611 | ||
612 | err = ext4_group_add(sb, input); | |
613 | if (EXT4_SB(sb)->s_journal) { | |
614 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
615 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
616 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
617 | } | |
618 | if (err == 0) | |
619 | err = err2; | |
620 | mnt_drop_write_file(file); | |
621 | if (!err && ext4_has_group_desc_csum(sb) && | |
622 | test_opt(sb, INIT_INODE_TABLE)) | |
623 | err = ext4_register_li_request(sb, input->group); | |
624 | group_add_out: | |
625 | ext4_resize_end(sb); | |
626 | return err; | |
627 | } | |
628 | ||
5cdd7b2d | 629 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 630 | { |
496ad9aa | 631 | struct inode *inode = file_inode(filp); |
bab08ab9 | 632 | struct super_block *sb = inode->i_sb; |
617ba13b | 633 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 634 | unsigned int flags; |
ac27a0ec | 635 | |
af5bc92d | 636 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
637 | |
638 | switch (cmd) { | |
0c9ec4be DW |
639 | case FS_IOC_GETFSMAP: |
640 | return ext4_ioc_getfsmap(sb, (void __user *)arg); | |
617ba13b MC |
641 | case EXT4_IOC_GETFLAGS: |
642 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; | |
ac27a0ec | 643 | return put_user(flags, (int __user *) arg); |
617ba13b | 644 | case EXT4_IOC_SETFLAGS: { |
9b7365fc | 645 | int err; |
ac27a0ec | 646 | |
2e149670 | 647 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
648 | return -EACCES; |
649 | ||
650 | if (get_user(flags, (int __user *) arg)) | |
651 | return -EFAULT; | |
652 | ||
d14e7683 JK |
653 | if (flags & ~EXT4_FL_USER_VISIBLE) |
654 | return -EOPNOTSUPP; | |
655 | /* | |
656 | * chattr(1) grabs flags via GETFLAGS, modifies the result and | |
657 | * passes that to SETFLAGS. So we cannot easily make SETFLAGS | |
658 | * more restrictive than just silently masking off visible but | |
659 | * not settable flags as we always did. | |
660 | */ | |
661 | flags &= EXT4_FL_USER_MODIFIABLE; | |
662 | if (ext4_mask_flags(inode->i_mode, flags) != flags) | |
663 | return -EOPNOTSUPP; | |
664 | ||
a561be71 | 665 | err = mnt_want_write_file(filp); |
42a74f20 DH |
666 | if (err) |
667 | return err; | |
668 | ||
5955102c | 669 | inode_lock(inode); |
9b7365fc | 670 | err = ext4_ioctl_setflags(inode, flags); |
5955102c | 671 | inode_unlock(inode); |
2a79f17e | 672 | mnt_drop_write_file(filp); |
ac27a0ec DK |
673 | return err; |
674 | } | |
617ba13b MC |
675 | case EXT4_IOC_GETVERSION: |
676 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 677 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
678 | case EXT4_IOC_SETVERSION: |
679 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 680 | handle_t *handle; |
617ba13b | 681 | struct ext4_iloc iloc; |
ac27a0ec DK |
682 | __u32 generation; |
683 | int err; | |
684 | ||
2e149670 | 685 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 686 | return -EPERM; |
42a74f20 | 687 | |
9aa5d32b | 688 | if (ext4_has_metadata_csum(inode->i_sb)) { |
814525f4 DW |
689 | ext4_warning(sb, "Setting inode version is not " |
690 | "supported with metadata_csum enabled."); | |
691 | return -ENOTTY; | |
692 | } | |
693 | ||
a561be71 | 694 | err = mnt_want_write_file(filp); |
42a74f20 DH |
695 | if (err) |
696 | return err; | |
697 | if (get_user(generation, (int __user *) arg)) { | |
698 | err = -EFAULT; | |
699 | goto setversion_out; | |
700 | } | |
ac27a0ec | 701 | |
5955102c | 702 | inode_lock(inode); |
9924a92a | 703 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
704 | if (IS_ERR(handle)) { |
705 | err = PTR_ERR(handle); | |
6c2155b9 | 706 | goto unlock_out; |
42a74f20 | 707 | } |
617ba13b | 708 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 709 | if (err == 0) { |
eeca7ea1 | 710 | inode->i_ctime = current_time(inode); |
ac27a0ec | 711 | inode->i_generation = generation; |
617ba13b | 712 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 713 | } |
617ba13b | 714 | ext4_journal_stop(handle); |
6c2155b9 DH |
715 | |
716 | unlock_out: | |
5955102c | 717 | inode_unlock(inode); |
42a74f20 | 718 | setversion_out: |
2a79f17e | 719 | mnt_drop_write_file(filp); |
ac27a0ec DK |
720 | return err; |
721 | } | |
617ba13b MC |
722 | case EXT4_IOC_GROUP_EXTEND: { |
723 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 724 | int err, err2=0; |
ac27a0ec | 725 | |
8f82f840 YY |
726 | err = ext4_resize_begin(sb); |
727 | if (err) | |
728 | return err; | |
ac27a0ec | 729 | |
014a1770 DH |
730 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
731 | err = -EFAULT; | |
732 | goto group_extend_out; | |
733 | } | |
ac27a0ec | 734 | |
e2b911c5 | 735 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
736 | ext4_msg(sb, KERN_ERR, |
737 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
738 | err = -EOPNOTSUPP; |
739 | goto group_extend_out; | |
bab08ab9 TT |
740 | } |
741 | ||
a561be71 | 742 | err = mnt_want_write_file(filp); |
42a74f20 | 743 | if (err) |
014a1770 | 744 | goto group_extend_out; |
42a74f20 | 745 | |
617ba13b | 746 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
747 | if (EXT4_SB(sb)->s_journal) { |
748 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
749 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
750 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
751 | } | |
7ffe1ea8 HK |
752 | if (err == 0) |
753 | err = err2; | |
2a79f17e | 754 | mnt_drop_write_file(filp); |
014a1770 | 755 | group_extend_out: |
8f82f840 | 756 | ext4_resize_end(sb); |
ac27a0ec DK |
757 | return err; |
758 | } | |
748de673 AF |
759 | |
760 | case EXT4_IOC_MOVE_EXT: { | |
761 | struct move_extent me; | |
2903ff01 AV |
762 | struct fd donor; |
763 | int err; | |
748de673 | 764 | |
4a58579b AF |
765 | if (!(filp->f_mode & FMODE_READ) || |
766 | !(filp->f_mode & FMODE_WRITE)) | |
767 | return -EBADF; | |
768 | ||
748de673 AF |
769 | if (copy_from_user(&me, |
770 | (struct move_extent __user *)arg, sizeof(me))) | |
771 | return -EFAULT; | |
4a58579b | 772 | me.moved_len = 0; |
748de673 | 773 | |
2903ff01 AV |
774 | donor = fdget(me.donor_fd); |
775 | if (!donor.file) | |
748de673 AF |
776 | return -EBADF; |
777 | ||
2903ff01 | 778 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
779 | err = -EBADF; |
780 | goto mext_out; | |
748de673 AF |
781 | } |
782 | ||
e2b911c5 | 783 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
784 | ext4_msg(sb, KERN_ERR, |
785 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
786 | err = -EOPNOTSUPP; |
787 | goto mext_out; | |
73f34a5e RZ |
788 | } else if (IS_DAX(inode)) { |
789 | ext4_msg(sb, KERN_ERR, | |
790 | "Online defrag not supported with DAX"); | |
791 | err = -EOPNOTSUPP; | |
792 | goto mext_out; | |
bab08ab9 TT |
793 | } |
794 | ||
a561be71 | 795 | err = mnt_want_write_file(filp); |
4a58579b AF |
796 | if (err) |
797 | goto mext_out; | |
798 | ||
2903ff01 | 799 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 800 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 801 | mnt_drop_write_file(filp); |
748de673 | 802 | |
60e6679e | 803 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 804 | &me, sizeof(me))) |
4a58579b AF |
805 | err = -EFAULT; |
806 | mext_out: | |
2903ff01 | 807 | fdput(donor); |
748de673 AF |
808 | return err; |
809 | } | |
810 | ||
617ba13b MC |
811 | case EXT4_IOC_GROUP_ADD: { |
812 | struct ext4_new_group_data input; | |
ac27a0ec | 813 | |
617ba13b | 814 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
e145b35b AV |
815 | sizeof(input))) |
816 | return -EFAULT; | |
42a74f20 | 817 | |
e145b35b | 818 | return ext4_ioctl_group_add(filp, &input); |
ac27a0ec DK |
819 | } |
820 | ||
c14c6fd5 | 821 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
822 | { |
823 | int err; | |
2e149670 | 824 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
825 | return -EACCES; |
826 | ||
a561be71 | 827 | err = mnt_want_write_file(filp); |
2a43a878 AK |
828 | if (err) |
829 | return err; | |
830 | /* | |
831 | * inode_mutex prevent write and truncate on the file. | |
832 | * Read still goes through. We take i_data_sem in | |
833 | * ext4_ext_swap_inode_data before we switch the | |
834 | * inode format to prevent read. | |
835 | */ | |
5955102c | 836 | inode_lock((inode)); |
2a43a878 | 837 | err = ext4_ext_migrate(inode); |
5955102c | 838 | inode_unlock((inode)); |
2a79f17e | 839 | mnt_drop_write_file(filp); |
2a43a878 AK |
840 | return err; |
841 | } | |
c14c6fd5 | 842 | |
ccd2506b TT |
843 | case EXT4_IOC_ALLOC_DA_BLKS: |
844 | { | |
845 | int err; | |
2e149670 | 846 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
847 | return -EACCES; |
848 | ||
a561be71 | 849 | err = mnt_want_write_file(filp); |
ccd2506b TT |
850 | if (err) |
851 | return err; | |
852 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 853 | mnt_drop_write_file(filp); |
ccd2506b TT |
854 | return err; |
855 | } | |
856 | ||
393d1d1d | 857 | case EXT4_IOC_SWAP_BOOT: |
3e67cfad DM |
858 | { |
859 | int err; | |
393d1d1d DTB |
860 | if (!(filp->f_mode & FMODE_WRITE)) |
861 | return -EBADF; | |
3e67cfad DM |
862 | err = mnt_want_write_file(filp); |
863 | if (err) | |
864 | return err; | |
865 | err = swap_inode_boot_loader(sb, inode); | |
866 | mnt_drop_write_file(filp); | |
867 | return err; | |
868 | } | |
393d1d1d | 869 | |
19c5246d YY |
870 | case EXT4_IOC_RESIZE_FS: { |
871 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 872 | int err = 0, err2 = 0; |
7f511862 | 873 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d | 874 | |
19c5246d YY |
875 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
876 | sizeof(__u64))) { | |
877 | return -EFAULT; | |
878 | } | |
879 | ||
19c5246d YY |
880 | err = ext4_resize_begin(sb); |
881 | if (err) | |
882 | return err; | |
883 | ||
8cae6f71 | 884 | err = mnt_want_write_file(filp); |
19c5246d YY |
885 | if (err) |
886 | goto resizefs_out; | |
887 | ||
888 | err = ext4_resize_fs(sb, n_blocks_count); | |
889 | if (EXT4_SB(sb)->s_journal) { | |
890 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
891 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
892 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
893 | } | |
894 | if (err == 0) | |
895 | err = err2; | |
8cae6f71 | 896 | mnt_drop_write_file(filp); |
7f511862 TT |
897 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
898 | ext4_has_group_desc_csum(sb) && | |
899 | test_opt(sb, INIT_INODE_TABLE)) | |
900 | err = ext4_register_li_request(sb, o_group); | |
901 | ||
19c5246d YY |
902 | resizefs_out: |
903 | ext4_resize_end(sb); | |
904 | return err; | |
905 | } | |
906 | ||
e681c047 LC |
907 | case FITRIM: |
908 | { | |
41431792 | 909 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
e681c047 LC |
910 | struct fstrim_range range; |
911 | int ret = 0; | |
912 | ||
913 | if (!capable(CAP_SYS_ADMIN)) | |
914 | return -EPERM; | |
915 | ||
41431792 LC |
916 | if (!blk_queue_discard(q)) |
917 | return -EOPNOTSUPP; | |
918 | ||
e6705f7c | 919 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
920 | sizeof(range))) |
921 | return -EFAULT; | |
922 | ||
5c2ed62f LC |
923 | range.minlen = max((unsigned int)range.minlen, |
924 | q->limits.discard_granularity); | |
e681c047 LC |
925 | ret = ext4_trim_fs(sb, &range); |
926 | if (ret < 0) | |
927 | return ret; | |
928 | ||
e6705f7c | 929 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
930 | sizeof(range))) |
931 | return -EFAULT; | |
932 | ||
933 | return 0; | |
934 | } | |
7869a4a6 TT |
935 | case EXT4_IOC_PRECACHE_EXTENTS: |
936 | return ext4_ext_precache(inode); | |
9bd8212f | 937 | |
db717d8e | 938 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
9a200d07 RW |
939 | if (!ext4_has_feature_encrypt(sb)) |
940 | return -EOPNOTSUPP; | |
db717d8e | 941 | return fscrypt_ioctl_set_policy(filp, (const void __user *)arg); |
9a200d07 | 942 | |
9bd8212f | 943 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: { |
ba679017 | 944 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
9bd8212f MH |
945 | int err, err2; |
946 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
947 | handle_t *handle; | |
948 | ||
35997d1c | 949 | if (!ext4_has_feature_encrypt(sb)) |
9bd8212f MH |
950 | return -EOPNOTSUPP; |
951 | if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { | |
952 | err = mnt_want_write_file(filp); | |
953 | if (err) | |
954 | return err; | |
955 | handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); | |
956 | if (IS_ERR(handle)) { | |
957 | err = PTR_ERR(handle); | |
958 | goto pwsalt_err_exit; | |
959 | } | |
960 | err = ext4_journal_get_write_access(handle, sbi->s_sbh); | |
961 | if (err) | |
962 | goto pwsalt_err_journal; | |
963 | generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); | |
964 | err = ext4_handle_dirty_metadata(handle, NULL, | |
965 | sbi->s_sbh); | |
966 | pwsalt_err_journal: | |
967 | err2 = ext4_journal_stop(handle); | |
968 | if (err2 && !err) | |
969 | err = err2; | |
970 | pwsalt_err_exit: | |
971 | mnt_drop_write_file(filp); | |
972 | if (err) | |
973 | return err; | |
974 | } | |
b4ab9e29 FF |
975 | if (copy_to_user((void __user *) arg, |
976 | sbi->s_es->s_encrypt_pw_salt, 16)) | |
9bd8212f MH |
977 | return -EFAULT; |
978 | return 0; | |
ba679017 EB |
979 | #else |
980 | return -EOPNOTSUPP; | |
981 | #endif | |
9bd8212f | 982 | } |
db717d8e EB |
983 | case EXT4_IOC_GET_ENCRYPTION_POLICY: |
984 | return fscrypt_ioctl_get_policy(filp, (void __user *)arg); | |
9bd8212f | 985 | |
9b7365fc LX |
986 | case EXT4_IOC_FSGETXATTR: |
987 | { | |
988 | struct fsxattr fa; | |
989 | ||
990 | memset(&fa, 0, sizeof(struct fsxattr)); | |
9b7365fc LX |
991 | fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE); |
992 | ||
0b7b7779 | 993 | if (ext4_has_feature_project(inode->i_sb)) { |
9b7365fc LX |
994 | fa.fsx_projid = (__u32)from_kprojid(&init_user_ns, |
995 | EXT4_I(inode)->i_projid); | |
996 | } | |
997 | ||
998 | if (copy_to_user((struct fsxattr __user *)arg, | |
999 | &fa, sizeof(fa))) | |
1000 | return -EFAULT; | |
1001 | return 0; | |
1002 | } | |
1003 | case EXT4_IOC_FSSETXATTR: | |
1004 | { | |
1005 | struct fsxattr fa; | |
1006 | int err; | |
1007 | ||
1008 | if (copy_from_user(&fa, (struct fsxattr __user *)arg, | |
1009 | sizeof(fa))) | |
1010 | return -EFAULT; | |
1011 | ||
1012 | /* Make sure caller has proper permission */ | |
1013 | if (!inode_owner_or_capable(inode)) | |
1014 | return -EACCES; | |
1015 | ||
d14e7683 JK |
1016 | if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS) |
1017 | return -EOPNOTSUPP; | |
1018 | ||
1019 | flags = ext4_xflags_to_iflags(fa.fsx_xflags); | |
1020 | if (ext4_mask_flags(inode->i_mode, flags) != flags) | |
1021 | return -EOPNOTSUPP; | |
1022 | ||
9b7365fc LX |
1023 | err = mnt_want_write_file(filp); |
1024 | if (err) | |
1025 | return err; | |
1026 | ||
5955102c | 1027 | inode_lock(inode); |
9b7365fc LX |
1028 | flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) | |
1029 | (flags & EXT4_FL_XFLAG_VISIBLE); | |
1030 | err = ext4_ioctl_setflags(inode, flags); | |
5955102c | 1031 | inode_unlock(inode); |
9b7365fc LX |
1032 | mnt_drop_write_file(filp); |
1033 | if (err) | |
1034 | return err; | |
1035 | ||
1036 | err = ext4_ioctl_setproject(filp, fa.fsx_projid); | |
1037 | if (err) | |
1038 | return err; | |
1039 | ||
1040 | return 0; | |
1041 | } | |
e9be2ac7 TT |
1042 | case EXT4_IOC_SHUTDOWN: |
1043 | return ext4_shutdown(sb, arg); | |
ac27a0ec DK |
1044 | default: |
1045 | return -ENOTTY; | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | #ifdef CONFIG_COMPAT | |
617ba13b | 1050 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 1051 | { |
ac27a0ec DK |
1052 | /* These are just misnamed, they actually get/put from/to user an int */ |
1053 | switch (cmd) { | |
617ba13b MC |
1054 | case EXT4_IOC32_GETFLAGS: |
1055 | cmd = EXT4_IOC_GETFLAGS; | |
ac27a0ec | 1056 | break; |
617ba13b MC |
1057 | case EXT4_IOC32_SETFLAGS: |
1058 | cmd = EXT4_IOC_SETFLAGS; | |
ac27a0ec | 1059 | break; |
617ba13b MC |
1060 | case EXT4_IOC32_GETVERSION: |
1061 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 1062 | break; |
617ba13b MC |
1063 | case EXT4_IOC32_SETVERSION: |
1064 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 1065 | break; |
617ba13b MC |
1066 | case EXT4_IOC32_GROUP_EXTEND: |
1067 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 1068 | break; |
617ba13b MC |
1069 | case EXT4_IOC32_GETVERSION_OLD: |
1070 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 1071 | break; |
617ba13b MC |
1072 | case EXT4_IOC32_SETVERSION_OLD: |
1073 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 1074 | break; |
617ba13b MC |
1075 | case EXT4_IOC32_GETRSVSZ: |
1076 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 1077 | break; |
617ba13b MC |
1078 | case EXT4_IOC32_SETRSVSZ: |
1079 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 1080 | break; |
4d92dc0f BH |
1081 | case EXT4_IOC32_GROUP_ADD: { |
1082 | struct compat_ext4_new_group_input __user *uinput; | |
e145b35b | 1083 | struct ext4_new_group_data input; |
4d92dc0f BH |
1084 | int err; |
1085 | ||
1086 | uinput = compat_ptr(arg); | |
1087 | err = get_user(input.group, &uinput->group); | |
1088 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
1089 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
1090 | err |= get_user(input.inode_table, &uinput->inode_table); | |
1091 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
1092 | err |= get_user(input.reserved_blocks, | |
1093 | &uinput->reserved_blocks); | |
1094 | if (err) | |
1095 | return -EFAULT; | |
e145b35b | 1096 | return ext4_ioctl_group_add(file, &input); |
4d92dc0f | 1097 | } |
b684b2ee | 1098 | case EXT4_IOC_MOVE_EXT: |
19c5246d | 1099 | case EXT4_IOC_RESIZE_FS: |
7869a4a6 | 1100 | case EXT4_IOC_PRECACHE_EXTENTS: |
9bd8212f MH |
1101 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
1102 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: | |
1103 | case EXT4_IOC_GET_ENCRYPTION_POLICY: | |
e9be2ac7 | 1104 | case EXT4_IOC_SHUTDOWN: |
0c9ec4be | 1105 | case FS_IOC_GETFSMAP: |
b684b2ee | 1106 | break; |
ac27a0ec DK |
1107 | default: |
1108 | return -ENOIOCTLCMD; | |
1109 | } | |
5cdd7b2d | 1110 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
1111 | } |
1112 | #endif |