Commit | Line | Data |
---|---|---|
ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/ioctl.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | */ | |
9 | ||
10 | #include <linux/fs.h> | |
ac27a0ec | 11 | #include <linux/capability.h> |
ac27a0ec DK |
12 | #include <linux/time.h> |
13 | #include <linux/compat.h> | |
42a74f20 | 14 | #include <linux/mount.h> |
748de673 | 15 | #include <linux/file.h> |
9bd8212f | 16 | #include <linux/random.h> |
9b7365fc | 17 | #include <linux/quotaops.h> |
ac27a0ec | 18 | #include <asm/uaccess.h> |
3dcf5451 CH |
19 | #include "ext4_jbd2.h" |
20 | #include "ext4.h" | |
ac27a0ec | 21 | |
19c5246d YY |
22 | #define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1) |
23 | ||
393d1d1d DTB |
24 | /** |
25 | * Swap memory between @a and @b for @len bytes. | |
26 | * | |
27 | * @a: pointer to first memory area | |
28 | * @b: pointer to second memory area | |
29 | * @len: number of bytes to swap | |
30 | * | |
31 | */ | |
32 | static void memswap(void *a, void *b, size_t len) | |
33 | { | |
34 | unsigned char *ap, *bp; | |
393d1d1d DTB |
35 | |
36 | ap = (unsigned char *)a; | |
37 | bp = (unsigned char *)b; | |
38 | while (len-- > 0) { | |
4b7e2db5 | 39 | swap(*ap, *bp); |
393d1d1d DTB |
40 | ap++; |
41 | bp++; | |
42 | } | |
43 | } | |
44 | ||
45 | /** | |
46 | * Swap i_data and associated attributes between @inode1 and @inode2. | |
47 | * This function is used for the primary swap between inode1 and inode2 | |
48 | * and also to revert this primary swap in case of errors. | |
49 | * | |
50 | * Therefore you have to make sure, that calling this method twice | |
51 | * will revert all changes. | |
52 | * | |
53 | * @inode1: pointer to first inode | |
54 | * @inode2: pointer to second inode | |
55 | */ | |
56 | static void swap_inode_data(struct inode *inode1, struct inode *inode2) | |
57 | { | |
58 | loff_t isize; | |
59 | struct ext4_inode_info *ei1; | |
60 | struct ext4_inode_info *ei2; | |
61 | ||
62 | ei1 = EXT4_I(inode1); | |
63 | ei2 = EXT4_I(inode2); | |
64 | ||
65 | memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags)); | |
66 | memswap(&inode1->i_version, &inode2->i_version, | |
67 | sizeof(inode1->i_version)); | |
68 | memswap(&inode1->i_blocks, &inode2->i_blocks, | |
69 | sizeof(inode1->i_blocks)); | |
70 | memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes)); | |
71 | memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime)); | |
72 | memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime)); | |
73 | ||
74 | memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); | |
75 | memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags)); | |
76 | memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize)); | |
cde2d7a7 TT |
77 | ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); |
78 | ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); | |
393d1d1d DTB |
79 | |
80 | isize = i_size_read(inode1); | |
81 | i_size_write(inode1, i_size_read(inode2)); | |
82 | i_size_write(inode2, isize); | |
83 | } | |
84 | ||
85 | /** | |
86 | * Swap the information from the given @inode and the inode | |
87 | * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other | |
88 | * important fields of the inodes. | |
89 | * | |
90 | * @sb: the super block of the filesystem | |
91 | * @inode: the inode to swap with EXT4_BOOT_LOADER_INO | |
92 | * | |
93 | */ | |
94 | static long swap_inode_boot_loader(struct super_block *sb, | |
95 | struct inode *inode) | |
96 | { | |
97 | handle_t *handle; | |
98 | int err; | |
99 | struct inode *inode_bl; | |
393d1d1d | 100 | struct ext4_inode_info *ei_bl; |
d7092ae2 | 101 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
393d1d1d | 102 | |
d8558a29 TT |
103 | if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) |
104 | return -EINVAL; | |
393d1d1d | 105 | |
d8558a29 TT |
106 | if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) |
107 | return -EPERM; | |
393d1d1d | 108 | |
393d1d1d | 109 | inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); |
d8558a29 TT |
110 | if (IS_ERR(inode_bl)) |
111 | return PTR_ERR(inode_bl); | |
393d1d1d DTB |
112 | ei_bl = EXT4_I(inode_bl); |
113 | ||
114 | filemap_flush(inode->i_mapping); | |
115 | filemap_flush(inode_bl->i_mapping); | |
116 | ||
117 | /* Protect orig inodes against a truncate and make sure, | |
118 | * that only 1 swap_inode_boot_loader is running. */ | |
375e289e | 119 | lock_two_nondirectories(inode, inode_bl); |
393d1d1d DTB |
120 | |
121 | truncate_inode_pages(&inode->i_data, 0); | |
122 | truncate_inode_pages(&inode_bl->i_data, 0); | |
123 | ||
124 | /* Wait for all existing dio workers */ | |
125 | ext4_inode_block_unlocked_dio(inode); | |
126 | ext4_inode_block_unlocked_dio(inode_bl); | |
127 | inode_dio_wait(inode); | |
128 | inode_dio_wait(inode_bl); | |
129 | ||
130 | handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); | |
131 | if (IS_ERR(handle)) { | |
132 | err = -EINVAL; | |
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; | |
146 | inode_bl->i_version = 1; | |
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 | ||
158 | inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode); | |
159 | ||
160 | spin_lock(&sbi->s_next_gen_lock); | |
161 | inode->i_generation = sbi->s_next_generation++; | |
162 | inode_bl->i_generation = sbi->s_next_generation++; | |
163 | spin_unlock(&sbi->s_next_gen_lock); | |
164 | ||
165 | ext4_discard_preallocations(inode); | |
166 | ||
167 | err = ext4_mark_inode_dirty(handle, inode); | |
168 | if (err < 0) { | |
169 | ext4_warning(inode->i_sb, | |
170 | "couldn't mark inode #%lu dirty (err %d)", | |
171 | inode->i_ino, err); | |
172 | /* Revert all changes: */ | |
173 | swap_inode_data(inode, inode_bl); | |
174 | } else { | |
175 | err = ext4_mark_inode_dirty(handle, inode_bl); | |
176 | if (err < 0) { | |
177 | ext4_warning(inode_bl->i_sb, | |
178 | "couldn't mark inode #%lu dirty (err %d)", | |
179 | inode_bl->i_ino, err); | |
180 | /* Revert all changes: */ | |
181 | swap_inode_data(inode, inode_bl); | |
182 | ext4_mark_inode_dirty(handle, inode); | |
183 | } | |
184 | } | |
393d1d1d | 185 | ext4_journal_stop(handle); |
393d1d1d DTB |
186 | ext4_double_up_write_data_sem(inode, inode_bl); |
187 | ||
30d29b11 | 188 | journal_err_out: |
393d1d1d DTB |
189 | ext4_inode_resume_unlocked_dio(inode); |
190 | ext4_inode_resume_unlocked_dio(inode_bl); | |
375e289e | 191 | unlock_two_nondirectories(inode, inode_bl); |
393d1d1d | 192 | iput(inode_bl); |
393d1d1d DTB |
193 | return err; |
194 | } | |
195 | ||
9bd8212f MH |
196 | static int uuid_is_zero(__u8 u[16]) |
197 | { | |
198 | int i; | |
199 | ||
200 | for (i = 0; i < 16; i++) | |
201 | if (u[i]) | |
202 | return 0; | |
203 | return 1; | |
204 | } | |
205 | ||
9b7365fc LX |
206 | static int ext4_ioctl_setflags(struct inode *inode, |
207 | unsigned int flags) | |
208 | { | |
209 | struct ext4_inode_info *ei = EXT4_I(inode); | |
210 | handle_t *handle = NULL; | |
fdde368e | 211 | int err = -EPERM, migrate = 0; |
9b7365fc LX |
212 | struct ext4_iloc iloc; |
213 | unsigned int oldflags, mask, i; | |
214 | unsigned int jflag; | |
215 | ||
216 | /* Is it quota file? Do not allow user to mess with it */ | |
217 | if (IS_NOQUOTA(inode)) | |
218 | goto flags_out; | |
219 | ||
220 | oldflags = ei->i_flags; | |
221 | ||
222 | /* The JOURNAL_DATA flag is modifiable only by root */ | |
223 | jflag = flags & EXT4_JOURNAL_DATA_FL; | |
224 | ||
225 | /* | |
226 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
227 | * the relevant capability. | |
228 | * | |
229 | * This test looks nicer. Thanks to Pauline Middelink | |
230 | */ | |
231 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { | |
232 | if (!capable(CAP_LINUX_IMMUTABLE)) | |
233 | goto flags_out; | |
234 | } | |
235 | ||
236 | /* | |
237 | * The JOURNAL_DATA flag can only be changed by | |
238 | * the relevant capability. | |
239 | */ | |
240 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { | |
241 | if (!capable(CAP_SYS_RESOURCE)) | |
242 | goto flags_out; | |
243 | } | |
244 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) | |
245 | migrate = 1; | |
246 | ||
247 | if (flags & EXT4_EOFBLOCKS_FL) { | |
248 | /* we don't support adding EOFBLOCKS flag */ | |
249 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { | |
250 | err = -EOPNOTSUPP; | |
251 | goto flags_out; | |
252 | } | |
253 | } else if (oldflags & EXT4_EOFBLOCKS_FL) | |
254 | ext4_truncate(inode); | |
255 | ||
256 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); | |
257 | if (IS_ERR(handle)) { | |
258 | err = PTR_ERR(handle); | |
259 | goto flags_out; | |
260 | } | |
261 | if (IS_SYNC(inode)) | |
262 | ext4_handle_sync(handle); | |
263 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
264 | if (err) | |
265 | goto flags_err; | |
266 | ||
267 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { | |
268 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
269 | continue; | |
270 | if (mask & flags) | |
271 | ext4_set_inode_flag(inode, i); | |
272 | else | |
273 | ext4_clear_inode_flag(inode, i); | |
274 | } | |
275 | ||
276 | ext4_set_inode_flags(inode); | |
277 | inode->i_ctime = ext4_current_time(inode); | |
278 | ||
279 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
280 | flags_err: | |
281 | ext4_journal_stop(handle); | |
282 | if (err) | |
283 | goto flags_out; | |
284 | ||
285 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) | |
286 | err = ext4_change_inode_journal_flag(inode, jflag); | |
287 | if (err) | |
288 | goto flags_out; | |
289 | if (migrate) { | |
290 | if (flags & EXT4_EXTENTS_FL) | |
291 | err = ext4_ext_migrate(inode); | |
292 | else | |
293 | err = ext4_ind_migrate(inode); | |
294 | } | |
295 | ||
296 | flags_out: | |
297 | return err; | |
298 | } | |
299 | ||
300 | #ifdef CONFIG_QUOTA | |
301 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
302 | { | |
303 | struct inode *inode = file_inode(filp); | |
304 | struct super_block *sb = inode->i_sb; | |
305 | struct ext4_inode_info *ei = EXT4_I(inode); | |
306 | int err, rc; | |
307 | handle_t *handle; | |
308 | kprojid_t kprojid; | |
309 | struct ext4_iloc iloc; | |
310 | struct ext4_inode *raw_inode; | |
311 | ||
312 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
313 | EXT4_FEATURE_RO_COMPAT_PROJECT)) { | |
314 | if (projid != EXT4_DEF_PROJID) | |
315 | return -EOPNOTSUPP; | |
316 | else | |
317 | return 0; | |
318 | } | |
319 | ||
320 | if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) | |
321 | return -EOPNOTSUPP; | |
322 | ||
323 | kprojid = make_kprojid(&init_user_ns, (projid_t)projid); | |
324 | ||
325 | if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) | |
326 | return 0; | |
327 | ||
328 | err = mnt_want_write_file(filp); | |
329 | if (err) | |
330 | return err; | |
331 | ||
332 | err = -EPERM; | |
5955102c | 333 | inode_lock(inode); |
9b7365fc LX |
334 | /* Is it quota file? Do not allow user to mess with it */ |
335 | if (IS_NOQUOTA(inode)) | |
336 | goto out_unlock; | |
337 | ||
338 | err = ext4_get_inode_loc(inode, &iloc); | |
339 | if (err) | |
340 | goto out_unlock; | |
341 | ||
342 | raw_inode = ext4_raw_inode(&iloc); | |
343 | if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { | |
344 | err = -EOVERFLOW; | |
345 | brelse(iloc.bh); | |
346 | goto out_unlock; | |
347 | } | |
348 | brelse(iloc.bh); | |
349 | ||
350 | dquot_initialize(inode); | |
351 | ||
352 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, | |
353 | EXT4_QUOTA_INIT_BLOCKS(sb) + | |
354 | EXT4_QUOTA_DEL_BLOCKS(sb) + 3); | |
355 | if (IS_ERR(handle)) { | |
356 | err = PTR_ERR(handle); | |
357 | goto out_unlock; | |
358 | } | |
359 | ||
360 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
361 | if (err) | |
362 | goto out_stop; | |
363 | ||
364 | if (sb_has_quota_limits_enabled(sb, PRJQUOTA)) { | |
365 | struct dquot *transfer_to[MAXQUOTAS] = { }; | |
366 | ||
367 | transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); | |
368 | if (transfer_to[PRJQUOTA]) { | |
369 | err = __dquot_transfer(inode, transfer_to); | |
370 | dqput(transfer_to[PRJQUOTA]); | |
371 | if (err) | |
372 | goto out_dirty; | |
373 | } | |
374 | } | |
375 | EXT4_I(inode)->i_projid = kprojid; | |
376 | inode->i_ctime = ext4_current_time(inode); | |
377 | out_dirty: | |
378 | rc = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
379 | if (!err) | |
380 | err = rc; | |
381 | out_stop: | |
382 | ext4_journal_stop(handle); | |
383 | out_unlock: | |
5955102c | 384 | inode_unlock(inode); |
9b7365fc LX |
385 | mnt_drop_write_file(filp); |
386 | return err; | |
387 | } | |
388 | #else | |
389 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
390 | { | |
391 | if (projid != EXT4_DEF_PROJID) | |
392 | return -EOPNOTSUPP; | |
393 | return 0; | |
394 | } | |
395 | #endif | |
396 | ||
397 | /* Transfer internal flags to xflags */ | |
398 | static inline __u32 ext4_iflags_to_xflags(unsigned long iflags) | |
399 | { | |
400 | __u32 xflags = 0; | |
401 | ||
402 | if (iflags & EXT4_SYNC_FL) | |
403 | xflags |= FS_XFLAG_SYNC; | |
404 | if (iflags & EXT4_IMMUTABLE_FL) | |
405 | xflags |= FS_XFLAG_IMMUTABLE; | |
406 | if (iflags & EXT4_APPEND_FL) | |
407 | xflags |= FS_XFLAG_APPEND; | |
408 | if (iflags & EXT4_NODUMP_FL) | |
409 | xflags |= FS_XFLAG_NODUMP; | |
410 | if (iflags & EXT4_NOATIME_FL) | |
411 | xflags |= FS_XFLAG_NOATIME; | |
412 | if (iflags & EXT4_PROJINHERIT_FL) | |
413 | xflags |= FS_XFLAG_PROJINHERIT; | |
414 | return xflags; | |
415 | } | |
416 | ||
417 | /* Transfer xflags flags to internal */ | |
418 | static inline unsigned long ext4_xflags_to_iflags(__u32 xflags) | |
419 | { | |
420 | unsigned long iflags = 0; | |
421 | ||
422 | if (xflags & FS_XFLAG_SYNC) | |
423 | iflags |= EXT4_SYNC_FL; | |
424 | if (xflags & FS_XFLAG_IMMUTABLE) | |
425 | iflags |= EXT4_IMMUTABLE_FL; | |
426 | if (xflags & FS_XFLAG_APPEND) | |
427 | iflags |= EXT4_APPEND_FL; | |
428 | if (xflags & FS_XFLAG_NODUMP) | |
429 | iflags |= EXT4_NODUMP_FL; | |
430 | if (xflags & FS_XFLAG_NOATIME) | |
431 | iflags |= EXT4_NOATIME_FL; | |
432 | if (xflags & FS_XFLAG_PROJINHERIT) | |
433 | iflags |= EXT4_PROJINHERIT_FL; | |
434 | ||
435 | return iflags; | |
436 | } | |
437 | ||
5cdd7b2d | 438 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 439 | { |
496ad9aa | 440 | struct inode *inode = file_inode(filp); |
bab08ab9 | 441 | struct super_block *sb = inode->i_sb; |
617ba13b | 442 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 443 | unsigned int flags; |
ac27a0ec | 444 | |
af5bc92d | 445 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
446 | |
447 | switch (cmd) { | |
617ba13b | 448 | case EXT4_IOC_GETFLAGS: |
ff9ddf7e | 449 | ext4_get_inode_flags(ei); |
617ba13b | 450 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
ac27a0ec | 451 | return put_user(flags, (int __user *) arg); |
617ba13b | 452 | case EXT4_IOC_SETFLAGS: { |
9b7365fc | 453 | int err; |
ac27a0ec | 454 | |
2e149670 | 455 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
456 | return -EACCES; |
457 | ||
458 | if (get_user(flags, (int __user *) arg)) | |
459 | return -EFAULT; | |
460 | ||
a561be71 | 461 | err = mnt_want_write_file(filp); |
42a74f20 DH |
462 | if (err) |
463 | return err; | |
464 | ||
2dc6b0d4 | 465 | flags = ext4_mask_flags(inode->i_mode, flags); |
ac27a0ec | 466 | |
5955102c | 467 | inode_lock(inode); |
9b7365fc | 468 | err = ext4_ioctl_setflags(inode, flags); |
5955102c | 469 | inode_unlock(inode); |
2a79f17e | 470 | mnt_drop_write_file(filp); |
ac27a0ec DK |
471 | return err; |
472 | } | |
617ba13b MC |
473 | case EXT4_IOC_GETVERSION: |
474 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 475 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
476 | case EXT4_IOC_SETVERSION: |
477 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 478 | handle_t *handle; |
617ba13b | 479 | struct ext4_iloc iloc; |
ac27a0ec DK |
480 | __u32 generation; |
481 | int err; | |
482 | ||
2e149670 | 483 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 484 | return -EPERM; |
42a74f20 | 485 | |
9aa5d32b | 486 | if (ext4_has_metadata_csum(inode->i_sb)) { |
814525f4 DW |
487 | ext4_warning(sb, "Setting inode version is not " |
488 | "supported with metadata_csum enabled."); | |
489 | return -ENOTTY; | |
490 | } | |
491 | ||
a561be71 | 492 | err = mnt_want_write_file(filp); |
42a74f20 DH |
493 | if (err) |
494 | return err; | |
495 | if (get_user(generation, (int __user *) arg)) { | |
496 | err = -EFAULT; | |
497 | goto setversion_out; | |
498 | } | |
ac27a0ec | 499 | |
5955102c | 500 | inode_lock(inode); |
9924a92a | 501 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
502 | if (IS_ERR(handle)) { |
503 | err = PTR_ERR(handle); | |
6c2155b9 | 504 | goto unlock_out; |
42a74f20 | 505 | } |
617ba13b | 506 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 507 | if (err == 0) { |
ef7f3835 | 508 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 509 | inode->i_generation = generation; |
617ba13b | 510 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 511 | } |
617ba13b | 512 | ext4_journal_stop(handle); |
6c2155b9 DH |
513 | |
514 | unlock_out: | |
5955102c | 515 | inode_unlock(inode); |
42a74f20 | 516 | setversion_out: |
2a79f17e | 517 | mnt_drop_write_file(filp); |
ac27a0ec DK |
518 | return err; |
519 | } | |
617ba13b MC |
520 | case EXT4_IOC_GROUP_EXTEND: { |
521 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 522 | int err, err2=0; |
ac27a0ec | 523 | |
8f82f840 YY |
524 | err = ext4_resize_begin(sb); |
525 | if (err) | |
526 | return err; | |
ac27a0ec | 527 | |
014a1770 DH |
528 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
529 | err = -EFAULT; | |
530 | goto group_extend_out; | |
531 | } | |
ac27a0ec | 532 | |
e2b911c5 | 533 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
534 | ext4_msg(sb, KERN_ERR, |
535 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
536 | err = -EOPNOTSUPP; |
537 | goto group_extend_out; | |
bab08ab9 TT |
538 | } |
539 | ||
a561be71 | 540 | err = mnt_want_write_file(filp); |
42a74f20 | 541 | if (err) |
014a1770 | 542 | goto group_extend_out; |
42a74f20 | 543 | |
617ba13b | 544 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
545 | if (EXT4_SB(sb)->s_journal) { |
546 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
547 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
548 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
549 | } | |
7ffe1ea8 HK |
550 | if (err == 0) |
551 | err = err2; | |
2a79f17e | 552 | mnt_drop_write_file(filp); |
014a1770 | 553 | group_extend_out: |
8f82f840 | 554 | ext4_resize_end(sb); |
ac27a0ec DK |
555 | return err; |
556 | } | |
748de673 AF |
557 | |
558 | case EXT4_IOC_MOVE_EXT: { | |
559 | struct move_extent me; | |
2903ff01 AV |
560 | struct fd donor; |
561 | int err; | |
748de673 | 562 | |
4a58579b AF |
563 | if (!(filp->f_mode & FMODE_READ) || |
564 | !(filp->f_mode & FMODE_WRITE)) | |
565 | return -EBADF; | |
566 | ||
748de673 AF |
567 | if (copy_from_user(&me, |
568 | (struct move_extent __user *)arg, sizeof(me))) | |
569 | return -EFAULT; | |
4a58579b | 570 | me.moved_len = 0; |
748de673 | 571 | |
2903ff01 AV |
572 | donor = fdget(me.donor_fd); |
573 | if (!donor.file) | |
748de673 AF |
574 | return -EBADF; |
575 | ||
2903ff01 | 576 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
577 | err = -EBADF; |
578 | goto mext_out; | |
748de673 AF |
579 | } |
580 | ||
e2b911c5 | 581 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
582 | ext4_msg(sb, KERN_ERR, |
583 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
584 | err = -EOPNOTSUPP; |
585 | goto mext_out; | |
73f34a5e RZ |
586 | } else if (IS_DAX(inode)) { |
587 | ext4_msg(sb, KERN_ERR, | |
588 | "Online defrag not supported with DAX"); | |
589 | err = -EOPNOTSUPP; | |
590 | goto mext_out; | |
bab08ab9 TT |
591 | } |
592 | ||
a561be71 | 593 | err = mnt_want_write_file(filp); |
4a58579b AF |
594 | if (err) |
595 | goto mext_out; | |
596 | ||
2903ff01 | 597 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 598 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 599 | mnt_drop_write_file(filp); |
748de673 | 600 | |
60e6679e | 601 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 602 | &me, sizeof(me))) |
4a58579b AF |
603 | err = -EFAULT; |
604 | mext_out: | |
2903ff01 | 605 | fdput(donor); |
748de673 AF |
606 | return err; |
607 | } | |
608 | ||
617ba13b MC |
609 | case EXT4_IOC_GROUP_ADD: { |
610 | struct ext4_new_group_data input; | |
ac046f1d | 611 | int err, err2=0; |
ac27a0ec | 612 | |
8f82f840 YY |
613 | err = ext4_resize_begin(sb); |
614 | if (err) | |
615 | return err; | |
ac27a0ec | 616 | |
617ba13b | 617 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
014a1770 DH |
618 | sizeof(input))) { |
619 | err = -EFAULT; | |
620 | goto group_add_out; | |
621 | } | |
ac27a0ec | 622 | |
e2b911c5 | 623 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
624 | ext4_msg(sb, KERN_ERR, |
625 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
626 | err = -EOPNOTSUPP; |
627 | goto group_add_out; | |
bab08ab9 TT |
628 | } |
629 | ||
a561be71 | 630 | err = mnt_want_write_file(filp); |
42a74f20 | 631 | if (err) |
014a1770 | 632 | goto group_add_out; |
42a74f20 | 633 | |
617ba13b | 634 | err = ext4_group_add(sb, &input); |
ac046f1d PT |
635 | if (EXT4_SB(sb)->s_journal) { |
636 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
637 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
638 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
639 | } | |
7ffe1ea8 HK |
640 | if (err == 0) |
641 | err = err2; | |
2a79f17e | 642 | mnt_drop_write_file(filp); |
7f511862 TT |
643 | if (!err && ext4_has_group_desc_csum(sb) && |
644 | test_opt(sb, INIT_INODE_TABLE)) | |
645 | err = ext4_register_li_request(sb, input.group); | |
014a1770 | 646 | group_add_out: |
8f82f840 | 647 | ext4_resize_end(sb); |
ac27a0ec DK |
648 | return err; |
649 | } | |
650 | ||
c14c6fd5 | 651 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
652 | { |
653 | int err; | |
2e149670 | 654 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
655 | return -EACCES; |
656 | ||
a561be71 | 657 | err = mnt_want_write_file(filp); |
2a43a878 AK |
658 | if (err) |
659 | return err; | |
660 | /* | |
661 | * inode_mutex prevent write and truncate on the file. | |
662 | * Read still goes through. We take i_data_sem in | |
663 | * ext4_ext_swap_inode_data before we switch the | |
664 | * inode format to prevent read. | |
665 | */ | |
5955102c | 666 | inode_lock((inode)); |
2a43a878 | 667 | err = ext4_ext_migrate(inode); |
5955102c | 668 | inode_unlock((inode)); |
2a79f17e | 669 | mnt_drop_write_file(filp); |
2a43a878 AK |
670 | return err; |
671 | } | |
c14c6fd5 | 672 | |
ccd2506b TT |
673 | case EXT4_IOC_ALLOC_DA_BLKS: |
674 | { | |
675 | int err; | |
2e149670 | 676 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
677 | return -EACCES; |
678 | ||
a561be71 | 679 | err = mnt_want_write_file(filp); |
ccd2506b TT |
680 | if (err) |
681 | return err; | |
682 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 683 | mnt_drop_write_file(filp); |
ccd2506b TT |
684 | return err; |
685 | } | |
686 | ||
393d1d1d | 687 | case EXT4_IOC_SWAP_BOOT: |
3e67cfad DM |
688 | { |
689 | int err; | |
393d1d1d DTB |
690 | if (!(filp->f_mode & FMODE_WRITE)) |
691 | return -EBADF; | |
3e67cfad DM |
692 | err = mnt_want_write_file(filp); |
693 | if (err) | |
694 | return err; | |
695 | err = swap_inode_boot_loader(sb, inode); | |
696 | mnt_drop_write_file(filp); | |
697 | return err; | |
698 | } | |
393d1d1d | 699 | |
19c5246d YY |
700 | case EXT4_IOC_RESIZE_FS: { |
701 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 702 | int err = 0, err2 = 0; |
7f511862 | 703 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d | 704 | |
e2b911c5 | 705 | if (ext4_has_feature_bigalloc(sb)) { |
19c5246d YY |
706 | ext4_msg(sb, KERN_ERR, |
707 | "Online resizing not (yet) supported with bigalloc"); | |
708 | return -EOPNOTSUPP; | |
709 | } | |
710 | ||
19c5246d YY |
711 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
712 | sizeof(__u64))) { | |
713 | return -EFAULT; | |
714 | } | |
715 | ||
19c5246d YY |
716 | err = ext4_resize_begin(sb); |
717 | if (err) | |
718 | return err; | |
719 | ||
8cae6f71 | 720 | err = mnt_want_write_file(filp); |
19c5246d YY |
721 | if (err) |
722 | goto resizefs_out; | |
723 | ||
724 | err = ext4_resize_fs(sb, n_blocks_count); | |
725 | if (EXT4_SB(sb)->s_journal) { | |
726 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
727 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
728 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
729 | } | |
730 | if (err == 0) | |
731 | err = err2; | |
8cae6f71 | 732 | mnt_drop_write_file(filp); |
7f511862 TT |
733 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
734 | ext4_has_group_desc_csum(sb) && | |
735 | test_opt(sb, INIT_INODE_TABLE)) | |
736 | err = ext4_register_li_request(sb, o_group); | |
737 | ||
19c5246d YY |
738 | resizefs_out: |
739 | ext4_resize_end(sb); | |
740 | return err; | |
741 | } | |
742 | ||
e681c047 LC |
743 | case FITRIM: |
744 | { | |
41431792 | 745 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
e681c047 LC |
746 | struct fstrim_range range; |
747 | int ret = 0; | |
748 | ||
749 | if (!capable(CAP_SYS_ADMIN)) | |
750 | return -EPERM; | |
751 | ||
41431792 LC |
752 | if (!blk_queue_discard(q)) |
753 | return -EOPNOTSUPP; | |
754 | ||
e6705f7c | 755 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
756 | sizeof(range))) |
757 | return -EFAULT; | |
758 | ||
5c2ed62f LC |
759 | range.minlen = max((unsigned int)range.minlen, |
760 | q->limits.discard_granularity); | |
e681c047 LC |
761 | ret = ext4_trim_fs(sb, &range); |
762 | if (ret < 0) | |
763 | return ret; | |
764 | ||
e6705f7c | 765 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
766 | sizeof(range))) |
767 | return -EFAULT; | |
768 | ||
769 | return 0; | |
770 | } | |
7869a4a6 TT |
771 | case EXT4_IOC_PRECACHE_EXTENTS: |
772 | return ext4_ext_precache(inode); | |
9bd8212f MH |
773 | case EXT4_IOC_SET_ENCRYPTION_POLICY: { |
774 | #ifdef CONFIG_EXT4_FS_ENCRYPTION | |
775 | struct ext4_encryption_policy policy; | |
776 | int err = 0; | |
777 | ||
778 | if (copy_from_user(&policy, | |
779 | (struct ext4_encryption_policy __user *)arg, | |
780 | sizeof(policy))) { | |
781 | err = -EFAULT; | |
782 | goto encryption_policy_out; | |
783 | } | |
e681c047 | 784 | |
9bd8212f MH |
785 | err = ext4_process_policy(&policy, inode); |
786 | encryption_policy_out: | |
787 | return err; | |
788 | #else | |
789 | return -EOPNOTSUPP; | |
790 | #endif | |
791 | } | |
792 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: { | |
793 | int err, err2; | |
794 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
795 | handle_t *handle; | |
796 | ||
797 | if (!ext4_sb_has_crypto(sb)) | |
798 | return -EOPNOTSUPP; | |
799 | if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { | |
800 | err = mnt_want_write_file(filp); | |
801 | if (err) | |
802 | return err; | |
803 | handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); | |
804 | if (IS_ERR(handle)) { | |
805 | err = PTR_ERR(handle); | |
806 | goto pwsalt_err_exit; | |
807 | } | |
808 | err = ext4_journal_get_write_access(handle, sbi->s_sbh); | |
809 | if (err) | |
810 | goto pwsalt_err_journal; | |
811 | generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); | |
812 | err = ext4_handle_dirty_metadata(handle, NULL, | |
813 | sbi->s_sbh); | |
814 | pwsalt_err_journal: | |
815 | err2 = ext4_journal_stop(handle); | |
816 | if (err2 && !err) | |
817 | err = err2; | |
818 | pwsalt_err_exit: | |
819 | mnt_drop_write_file(filp); | |
820 | if (err) | |
821 | return err; | |
822 | } | |
b4ab9e29 FF |
823 | if (copy_to_user((void __user *) arg, |
824 | sbi->s_es->s_encrypt_pw_salt, 16)) | |
9bd8212f MH |
825 | return -EFAULT; |
826 | return 0; | |
827 | } | |
828 | case EXT4_IOC_GET_ENCRYPTION_POLICY: { | |
829 | #ifdef CONFIG_EXT4_FS_ENCRYPTION | |
830 | struct ext4_encryption_policy policy; | |
831 | int err = 0; | |
832 | ||
833 | if (!ext4_encrypted_inode(inode)) | |
834 | return -ENOENT; | |
835 | err = ext4_get_policy(inode, &policy); | |
836 | if (err) | |
837 | return err; | |
b4ab9e29 | 838 | if (copy_to_user((void __user *)arg, &policy, sizeof(policy))) |
9bd8212f MH |
839 | return -EFAULT; |
840 | return 0; | |
841 | #else | |
842 | return -EOPNOTSUPP; | |
843 | #endif | |
844 | } | |
9b7365fc LX |
845 | case EXT4_IOC_FSGETXATTR: |
846 | { | |
847 | struct fsxattr fa; | |
848 | ||
849 | memset(&fa, 0, sizeof(struct fsxattr)); | |
850 | ext4_get_inode_flags(ei); | |
851 | fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE); | |
852 | ||
853 | if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, | |
854 | EXT4_FEATURE_RO_COMPAT_PROJECT)) { | |
855 | fa.fsx_projid = (__u32)from_kprojid(&init_user_ns, | |
856 | EXT4_I(inode)->i_projid); | |
857 | } | |
858 | ||
859 | if (copy_to_user((struct fsxattr __user *)arg, | |
860 | &fa, sizeof(fa))) | |
861 | return -EFAULT; | |
862 | return 0; | |
863 | } | |
864 | case EXT4_IOC_FSSETXATTR: | |
865 | { | |
866 | struct fsxattr fa; | |
867 | int err; | |
868 | ||
869 | if (copy_from_user(&fa, (struct fsxattr __user *)arg, | |
870 | sizeof(fa))) | |
871 | return -EFAULT; | |
872 | ||
873 | /* Make sure caller has proper permission */ | |
874 | if (!inode_owner_or_capable(inode)) | |
875 | return -EACCES; | |
876 | ||
877 | err = mnt_want_write_file(filp); | |
878 | if (err) | |
879 | return err; | |
880 | ||
881 | flags = ext4_xflags_to_iflags(fa.fsx_xflags); | |
882 | flags = ext4_mask_flags(inode->i_mode, flags); | |
883 | ||
5955102c | 884 | inode_lock(inode); |
9b7365fc LX |
885 | flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) | |
886 | (flags & EXT4_FL_XFLAG_VISIBLE); | |
887 | err = ext4_ioctl_setflags(inode, flags); | |
5955102c | 888 | inode_unlock(inode); |
9b7365fc LX |
889 | mnt_drop_write_file(filp); |
890 | if (err) | |
891 | return err; | |
892 | ||
893 | err = ext4_ioctl_setproject(filp, fa.fsx_projid); | |
894 | if (err) | |
895 | return err; | |
896 | ||
897 | return 0; | |
898 | } | |
ac27a0ec DK |
899 | default: |
900 | return -ENOTTY; | |
901 | } | |
902 | } | |
903 | ||
904 | #ifdef CONFIG_COMPAT | |
617ba13b | 905 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 906 | { |
ac27a0ec DK |
907 | /* These are just misnamed, they actually get/put from/to user an int */ |
908 | switch (cmd) { | |
617ba13b MC |
909 | case EXT4_IOC32_GETFLAGS: |
910 | cmd = EXT4_IOC_GETFLAGS; | |
ac27a0ec | 911 | break; |
617ba13b MC |
912 | case EXT4_IOC32_SETFLAGS: |
913 | cmd = EXT4_IOC_SETFLAGS; | |
ac27a0ec | 914 | break; |
617ba13b MC |
915 | case EXT4_IOC32_GETVERSION: |
916 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 917 | break; |
617ba13b MC |
918 | case EXT4_IOC32_SETVERSION: |
919 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 920 | break; |
617ba13b MC |
921 | case EXT4_IOC32_GROUP_EXTEND: |
922 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 923 | break; |
617ba13b MC |
924 | case EXT4_IOC32_GETVERSION_OLD: |
925 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 926 | break; |
617ba13b MC |
927 | case EXT4_IOC32_SETVERSION_OLD: |
928 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 929 | break; |
617ba13b MC |
930 | case EXT4_IOC32_GETRSVSZ: |
931 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 932 | break; |
617ba13b MC |
933 | case EXT4_IOC32_SETRSVSZ: |
934 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 935 | break; |
4d92dc0f BH |
936 | case EXT4_IOC32_GROUP_ADD: { |
937 | struct compat_ext4_new_group_input __user *uinput; | |
938 | struct ext4_new_group_input input; | |
939 | mm_segment_t old_fs; | |
940 | int err; | |
941 | ||
942 | uinput = compat_ptr(arg); | |
943 | err = get_user(input.group, &uinput->group); | |
944 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
945 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
946 | err |= get_user(input.inode_table, &uinput->inode_table); | |
947 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
948 | err |= get_user(input.reserved_blocks, | |
949 | &uinput->reserved_blocks); | |
950 | if (err) | |
951 | return -EFAULT; | |
952 | old_fs = get_fs(); | |
953 | set_fs(KERNEL_DS); | |
954 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, | |
955 | (unsigned long) &input); | |
956 | set_fs(old_fs); | |
957 | return err; | |
958 | } | |
b684b2ee | 959 | case EXT4_IOC_MOVE_EXT: |
19c5246d | 960 | case EXT4_IOC_RESIZE_FS: |
7869a4a6 | 961 | case EXT4_IOC_PRECACHE_EXTENTS: |
9bd8212f MH |
962 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
963 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: | |
964 | case EXT4_IOC_GET_ENCRYPTION_POLICY: | |
b684b2ee | 965 | break; |
ac27a0ec DK |
966 | default: |
967 | return -ENOIOCTLCMD; | |
968 | } | |
5cdd7b2d | 969 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
970 | } |
971 | #endif |