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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> |
9b7365fc | 16 | #include <linux/quotaops.h> |
8da4b8c4 | 17 | #include <linux/uuid.h> |
ac27a0ec | 18 | #include <asm/uaccess.h> |
3dcf5451 CH |
19 | #include "ext4_jbd2.h" |
20 | #include "ext4.h" | |
ac27a0ec | 21 | |
393d1d1d DTB |
22 | /** |
23 | * Swap memory between @a and @b for @len bytes. | |
24 | * | |
25 | * @a: pointer to first memory area | |
26 | * @b: pointer to second memory area | |
27 | * @len: number of bytes to swap | |
28 | * | |
29 | */ | |
30 | static void memswap(void *a, void *b, size_t len) | |
31 | { | |
32 | unsigned char *ap, *bp; | |
393d1d1d DTB |
33 | |
34 | ap = (unsigned char *)a; | |
35 | bp = (unsigned char *)b; | |
36 | while (len-- > 0) { | |
4b7e2db5 | 37 | swap(*ap, *bp); |
393d1d1d DTB |
38 | ap++; |
39 | bp++; | |
40 | } | |
41 | } | |
42 | ||
43 | /** | |
44 | * Swap i_data and associated attributes between @inode1 and @inode2. | |
45 | * This function is used for the primary swap between inode1 and inode2 | |
46 | * and also to revert this primary swap in case of errors. | |
47 | * | |
48 | * Therefore you have to make sure, that calling this method twice | |
49 | * will revert all changes. | |
50 | * | |
51 | * @inode1: pointer to first inode | |
52 | * @inode2: pointer to second inode | |
53 | */ | |
54 | static void swap_inode_data(struct inode *inode1, struct inode *inode2) | |
55 | { | |
56 | loff_t isize; | |
57 | struct ext4_inode_info *ei1; | |
58 | struct ext4_inode_info *ei2; | |
59 | ||
60 | ei1 = EXT4_I(inode1); | |
61 | ei2 = EXT4_I(inode2); | |
62 | ||
63 | memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags)); | |
64 | memswap(&inode1->i_version, &inode2->i_version, | |
65 | sizeof(inode1->i_version)); | |
66 | memswap(&inode1->i_blocks, &inode2->i_blocks, | |
67 | sizeof(inode1->i_blocks)); | |
68 | memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes)); | |
69 | memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime)); | |
70 | memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime)); | |
71 | ||
72 | memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); | |
73 | memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags)); | |
74 | memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize)); | |
cde2d7a7 TT |
75 | ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); |
76 | ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); | |
393d1d1d DTB |
77 | |
78 | isize = i_size_read(inode1); | |
79 | i_size_write(inode1, i_size_read(inode2)); | |
80 | i_size_write(inode2, isize); | |
81 | } | |
82 | ||
83 | /** | |
84 | * Swap the information from the given @inode and the inode | |
85 | * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other | |
86 | * important fields of the inodes. | |
87 | * | |
88 | * @sb: the super block of the filesystem | |
89 | * @inode: the inode to swap with EXT4_BOOT_LOADER_INO | |
90 | * | |
91 | */ | |
92 | static long swap_inode_boot_loader(struct super_block *sb, | |
93 | struct inode *inode) | |
94 | { | |
95 | handle_t *handle; | |
96 | int err; | |
97 | struct inode *inode_bl; | |
393d1d1d | 98 | struct ext4_inode_info *ei_bl; |
d7092ae2 | 99 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
393d1d1d | 100 | |
d8558a29 TT |
101 | if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) |
102 | return -EINVAL; | |
393d1d1d | 103 | |
d8558a29 TT |
104 | if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) |
105 | return -EPERM; | |
393d1d1d | 106 | |
393d1d1d | 107 | inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); |
d8558a29 TT |
108 | if (IS_ERR(inode_bl)) |
109 | return PTR_ERR(inode_bl); | |
393d1d1d DTB |
110 | ei_bl = EXT4_I(inode_bl); |
111 | ||
112 | filemap_flush(inode->i_mapping); | |
113 | filemap_flush(inode_bl->i_mapping); | |
114 | ||
115 | /* Protect orig inodes against a truncate and make sure, | |
116 | * that only 1 swap_inode_boot_loader is running. */ | |
375e289e | 117 | lock_two_nondirectories(inode, inode_bl); |
393d1d1d DTB |
118 | |
119 | truncate_inode_pages(&inode->i_data, 0); | |
120 | truncate_inode_pages(&inode_bl->i_data, 0); | |
121 | ||
122 | /* Wait for all existing dio workers */ | |
123 | ext4_inode_block_unlocked_dio(inode); | |
124 | ext4_inode_block_unlocked_dio(inode_bl); | |
125 | inode_dio_wait(inode); | |
126 | inode_dio_wait(inode_bl); | |
127 | ||
128 | handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); | |
129 | if (IS_ERR(handle)) { | |
130 | err = -EINVAL; | |
30d29b11 | 131 | goto journal_err_out; |
393d1d1d DTB |
132 | } |
133 | ||
134 | /* Protect extent tree against block allocations via delalloc */ | |
135 | ext4_double_down_write_data_sem(inode, inode_bl); | |
136 | ||
137 | if (inode_bl->i_nlink == 0) { | |
138 | /* this inode has never been used as a BOOT_LOADER */ | |
139 | set_nlink(inode_bl, 1); | |
140 | i_uid_write(inode_bl, 0); | |
141 | i_gid_write(inode_bl, 0); | |
142 | inode_bl->i_flags = 0; | |
143 | ei_bl->i_flags = 0; | |
144 | inode_bl->i_version = 1; | |
145 | i_size_write(inode_bl, 0); | |
146 | inode_bl->i_mode = S_IFREG; | |
e2b911c5 | 147 | if (ext4_has_feature_extents(sb)) { |
393d1d1d DTB |
148 | ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); |
149 | ext4_ext_tree_init(handle, inode_bl); | |
150 | } else | |
151 | memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); | |
152 | } | |
153 | ||
154 | swap_inode_data(inode, inode_bl); | |
155 | ||
156 | inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode); | |
157 | ||
158 | spin_lock(&sbi->s_next_gen_lock); | |
159 | inode->i_generation = sbi->s_next_generation++; | |
160 | inode_bl->i_generation = sbi->s_next_generation++; | |
161 | spin_unlock(&sbi->s_next_gen_lock); | |
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: |
393d1d1d DTB |
187 | ext4_inode_resume_unlocked_dio(inode); |
188 | ext4_inode_resume_unlocked_dio(inode_bl); | |
375e289e | 189 | unlock_two_nondirectories(inode, inode_bl); |
393d1d1d | 190 | iput(inode_bl); |
393d1d1d DTB |
191 | return err; |
192 | } | |
193 | ||
9bd8212f MH |
194 | static int uuid_is_zero(__u8 u[16]) |
195 | { | |
196 | int i; | |
197 | ||
198 | for (i = 0; i < 16; i++) | |
199 | if (u[i]) | |
200 | return 0; | |
201 | return 1; | |
202 | } | |
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 */ | |
215 | if (IS_NOQUOTA(inode)) | |
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 | } | |
251 | } else if (oldflags & EXT4_EOFBLOCKS_FL) | |
252 | ext4_truncate(inode); | |
253 | ||
254 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); | |
255 | if (IS_ERR(handle)) { | |
256 | err = PTR_ERR(handle); | |
257 | goto flags_out; | |
258 | } | |
259 | if (IS_SYNC(inode)) | |
260 | ext4_handle_sync(handle); | |
261 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
262 | if (err) | |
263 | goto flags_err; | |
264 | ||
265 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { | |
266 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
267 | continue; | |
268 | if (mask & flags) | |
269 | ext4_set_inode_flag(inode, i); | |
270 | else | |
271 | ext4_clear_inode_flag(inode, i); | |
272 | } | |
273 | ||
274 | ext4_set_inode_flags(inode); | |
275 | inode->i_ctime = ext4_current_time(inode); | |
276 | ||
277 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
278 | flags_err: | |
279 | ext4_journal_stop(handle); | |
280 | if (err) | |
281 | goto flags_out; | |
282 | ||
283 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) | |
284 | err = ext4_change_inode_journal_flag(inode, jflag); | |
285 | if (err) | |
286 | goto flags_out; | |
287 | if (migrate) { | |
288 | if (flags & EXT4_EXTENTS_FL) | |
289 | err = ext4_ext_migrate(inode); | |
290 | else | |
291 | err = ext4_ind_migrate(inode); | |
292 | } | |
293 | ||
294 | flags_out: | |
295 | return err; | |
296 | } | |
297 | ||
298 | #ifdef CONFIG_QUOTA | |
299 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
300 | { | |
301 | struct inode *inode = file_inode(filp); | |
302 | struct super_block *sb = inode->i_sb; | |
303 | struct ext4_inode_info *ei = EXT4_I(inode); | |
304 | int err, rc; | |
305 | handle_t *handle; | |
306 | kprojid_t kprojid; | |
307 | struct ext4_iloc iloc; | |
308 | struct ext4_inode *raw_inode; | |
079788d0 | 309 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
9b7365fc | 310 | |
0b7b7779 | 311 | if (!ext4_has_feature_project(sb)) { |
9b7365fc LX |
312 | if (projid != EXT4_DEF_PROJID) |
313 | return -EOPNOTSUPP; | |
314 | else | |
315 | return 0; | |
316 | } | |
317 | ||
318 | if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) | |
319 | return -EOPNOTSUPP; | |
320 | ||
321 | kprojid = make_kprojid(&init_user_ns, (projid_t)projid); | |
322 | ||
323 | if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) | |
324 | return 0; | |
325 | ||
326 | err = mnt_want_write_file(filp); | |
327 | if (err) | |
328 | return err; | |
329 | ||
330 | err = -EPERM; | |
5955102c | 331 | inode_lock(inode); |
9b7365fc LX |
332 | /* Is it quota file? Do not allow user to mess with it */ |
333 | if (IS_NOQUOTA(inode)) | |
334 | goto out_unlock; | |
335 | ||
336 | err = ext4_get_inode_loc(inode, &iloc); | |
337 | if (err) | |
338 | goto out_unlock; | |
339 | ||
340 | raw_inode = ext4_raw_inode(&iloc); | |
341 | if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { | |
342 | err = -EOVERFLOW; | |
343 | brelse(iloc.bh); | |
344 | goto out_unlock; | |
345 | } | |
346 | brelse(iloc.bh); | |
347 | ||
348 | dquot_initialize(inode); | |
349 | ||
350 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, | |
351 | EXT4_QUOTA_INIT_BLOCKS(sb) + | |
352 | EXT4_QUOTA_DEL_BLOCKS(sb) + 3); | |
353 | if (IS_ERR(handle)) { | |
354 | err = PTR_ERR(handle); | |
355 | goto out_unlock; | |
356 | } | |
357 | ||
358 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
359 | if (err) | |
360 | goto out_stop; | |
361 | ||
079788d0 WS |
362 | transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); |
363 | if (!IS_ERR(transfer_to[PRJQUOTA])) { | |
364 | err = __dquot_transfer(inode, transfer_to); | |
365 | dqput(transfer_to[PRJQUOTA]); | |
366 | if (err) | |
367 | goto out_dirty; | |
9b7365fc | 368 | } |
079788d0 | 369 | |
9b7365fc LX |
370 | EXT4_I(inode)->i_projid = kprojid; |
371 | inode->i_ctime = ext4_current_time(inode); | |
372 | out_dirty: | |
373 | rc = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
374 | if (!err) | |
375 | err = rc; | |
376 | out_stop: | |
377 | ext4_journal_stop(handle); | |
378 | out_unlock: | |
5955102c | 379 | inode_unlock(inode); |
9b7365fc LX |
380 | mnt_drop_write_file(filp); |
381 | return err; | |
382 | } | |
383 | #else | |
384 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
385 | { | |
386 | if (projid != EXT4_DEF_PROJID) | |
387 | return -EOPNOTSUPP; | |
388 | return 0; | |
389 | } | |
390 | #endif | |
391 | ||
392 | /* Transfer internal flags to xflags */ | |
393 | static inline __u32 ext4_iflags_to_xflags(unsigned long iflags) | |
394 | { | |
395 | __u32 xflags = 0; | |
396 | ||
397 | if (iflags & EXT4_SYNC_FL) | |
398 | xflags |= FS_XFLAG_SYNC; | |
399 | if (iflags & EXT4_IMMUTABLE_FL) | |
400 | xflags |= FS_XFLAG_IMMUTABLE; | |
401 | if (iflags & EXT4_APPEND_FL) | |
402 | xflags |= FS_XFLAG_APPEND; | |
403 | if (iflags & EXT4_NODUMP_FL) | |
404 | xflags |= FS_XFLAG_NODUMP; | |
405 | if (iflags & EXT4_NOATIME_FL) | |
406 | xflags |= FS_XFLAG_NOATIME; | |
407 | if (iflags & EXT4_PROJINHERIT_FL) | |
408 | xflags |= FS_XFLAG_PROJINHERIT; | |
409 | return xflags; | |
410 | } | |
411 | ||
412 | /* Transfer xflags flags to internal */ | |
413 | static inline unsigned long ext4_xflags_to_iflags(__u32 xflags) | |
414 | { | |
415 | unsigned long iflags = 0; | |
416 | ||
417 | if (xflags & FS_XFLAG_SYNC) | |
418 | iflags |= EXT4_SYNC_FL; | |
419 | if (xflags & FS_XFLAG_IMMUTABLE) | |
420 | iflags |= EXT4_IMMUTABLE_FL; | |
421 | if (xflags & FS_XFLAG_APPEND) | |
422 | iflags |= EXT4_APPEND_FL; | |
423 | if (xflags & FS_XFLAG_NODUMP) | |
424 | iflags |= EXT4_NODUMP_FL; | |
425 | if (xflags & FS_XFLAG_NOATIME) | |
426 | iflags |= EXT4_NOATIME_FL; | |
427 | if (xflags & FS_XFLAG_PROJINHERIT) | |
428 | iflags |= EXT4_PROJINHERIT_FL; | |
429 | ||
430 | return iflags; | |
431 | } | |
432 | ||
5cdd7b2d | 433 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 434 | { |
496ad9aa | 435 | struct inode *inode = file_inode(filp); |
bab08ab9 | 436 | struct super_block *sb = inode->i_sb; |
617ba13b | 437 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 438 | unsigned int flags; |
ac27a0ec | 439 | |
af5bc92d | 440 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
441 | |
442 | switch (cmd) { | |
617ba13b | 443 | case EXT4_IOC_GETFLAGS: |
ff9ddf7e | 444 | ext4_get_inode_flags(ei); |
617ba13b | 445 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
ac27a0ec | 446 | return put_user(flags, (int __user *) arg); |
617ba13b | 447 | case EXT4_IOC_SETFLAGS: { |
9b7365fc | 448 | int err; |
ac27a0ec | 449 | |
2e149670 | 450 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
451 | return -EACCES; |
452 | ||
453 | if (get_user(flags, (int __user *) arg)) | |
454 | return -EFAULT; | |
455 | ||
a561be71 | 456 | err = mnt_want_write_file(filp); |
42a74f20 DH |
457 | if (err) |
458 | return err; | |
459 | ||
2dc6b0d4 | 460 | flags = ext4_mask_flags(inode->i_mode, flags); |
ac27a0ec | 461 | |
5955102c | 462 | inode_lock(inode); |
9b7365fc | 463 | err = ext4_ioctl_setflags(inode, flags); |
5955102c | 464 | inode_unlock(inode); |
2a79f17e | 465 | mnt_drop_write_file(filp); |
ac27a0ec DK |
466 | return err; |
467 | } | |
617ba13b MC |
468 | case EXT4_IOC_GETVERSION: |
469 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 470 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
471 | case EXT4_IOC_SETVERSION: |
472 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 473 | handle_t *handle; |
617ba13b | 474 | struct ext4_iloc iloc; |
ac27a0ec DK |
475 | __u32 generation; |
476 | int err; | |
477 | ||
2e149670 | 478 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 479 | return -EPERM; |
42a74f20 | 480 | |
9aa5d32b | 481 | if (ext4_has_metadata_csum(inode->i_sb)) { |
814525f4 DW |
482 | ext4_warning(sb, "Setting inode version is not " |
483 | "supported with metadata_csum enabled."); | |
484 | return -ENOTTY; | |
485 | } | |
486 | ||
a561be71 | 487 | err = mnt_want_write_file(filp); |
42a74f20 DH |
488 | if (err) |
489 | return err; | |
490 | if (get_user(generation, (int __user *) arg)) { | |
491 | err = -EFAULT; | |
492 | goto setversion_out; | |
493 | } | |
ac27a0ec | 494 | |
5955102c | 495 | inode_lock(inode); |
9924a92a | 496 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
497 | if (IS_ERR(handle)) { |
498 | err = PTR_ERR(handle); | |
6c2155b9 | 499 | goto unlock_out; |
42a74f20 | 500 | } |
617ba13b | 501 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 502 | if (err == 0) { |
ef7f3835 | 503 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 504 | inode->i_generation = generation; |
617ba13b | 505 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 506 | } |
617ba13b | 507 | ext4_journal_stop(handle); |
6c2155b9 DH |
508 | |
509 | unlock_out: | |
5955102c | 510 | inode_unlock(inode); |
42a74f20 | 511 | setversion_out: |
2a79f17e | 512 | mnt_drop_write_file(filp); |
ac27a0ec DK |
513 | return err; |
514 | } | |
617ba13b MC |
515 | case EXT4_IOC_GROUP_EXTEND: { |
516 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 517 | int err, err2=0; |
ac27a0ec | 518 | |
8f82f840 YY |
519 | err = ext4_resize_begin(sb); |
520 | if (err) | |
521 | return err; | |
ac27a0ec | 522 | |
014a1770 DH |
523 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
524 | err = -EFAULT; | |
525 | goto group_extend_out; | |
526 | } | |
ac27a0ec | 527 | |
e2b911c5 | 528 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
529 | ext4_msg(sb, KERN_ERR, |
530 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
531 | err = -EOPNOTSUPP; |
532 | goto group_extend_out; | |
bab08ab9 TT |
533 | } |
534 | ||
a561be71 | 535 | err = mnt_want_write_file(filp); |
42a74f20 | 536 | if (err) |
014a1770 | 537 | goto group_extend_out; |
42a74f20 | 538 | |
617ba13b | 539 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
540 | if (EXT4_SB(sb)->s_journal) { |
541 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
542 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
543 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
544 | } | |
7ffe1ea8 HK |
545 | if (err == 0) |
546 | err = err2; | |
2a79f17e | 547 | mnt_drop_write_file(filp); |
014a1770 | 548 | group_extend_out: |
8f82f840 | 549 | ext4_resize_end(sb); |
ac27a0ec DK |
550 | return err; |
551 | } | |
748de673 AF |
552 | |
553 | case EXT4_IOC_MOVE_EXT: { | |
554 | struct move_extent me; | |
2903ff01 AV |
555 | struct fd donor; |
556 | int err; | |
748de673 | 557 | |
4a58579b AF |
558 | if (!(filp->f_mode & FMODE_READ) || |
559 | !(filp->f_mode & FMODE_WRITE)) | |
560 | return -EBADF; | |
561 | ||
748de673 AF |
562 | if (copy_from_user(&me, |
563 | (struct move_extent __user *)arg, sizeof(me))) | |
564 | return -EFAULT; | |
4a58579b | 565 | me.moved_len = 0; |
748de673 | 566 | |
2903ff01 AV |
567 | donor = fdget(me.donor_fd); |
568 | if (!donor.file) | |
748de673 AF |
569 | return -EBADF; |
570 | ||
2903ff01 | 571 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
572 | err = -EBADF; |
573 | goto mext_out; | |
748de673 AF |
574 | } |
575 | ||
e2b911c5 | 576 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
577 | ext4_msg(sb, KERN_ERR, |
578 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
579 | err = -EOPNOTSUPP; |
580 | goto mext_out; | |
73f34a5e RZ |
581 | } else if (IS_DAX(inode)) { |
582 | ext4_msg(sb, KERN_ERR, | |
583 | "Online defrag not supported with DAX"); | |
584 | err = -EOPNOTSUPP; | |
585 | goto mext_out; | |
bab08ab9 TT |
586 | } |
587 | ||
a561be71 | 588 | err = mnt_want_write_file(filp); |
4a58579b AF |
589 | if (err) |
590 | goto mext_out; | |
591 | ||
2903ff01 | 592 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 593 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 594 | mnt_drop_write_file(filp); |
748de673 | 595 | |
60e6679e | 596 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 597 | &me, sizeof(me))) |
4a58579b AF |
598 | err = -EFAULT; |
599 | mext_out: | |
2903ff01 | 600 | fdput(donor); |
748de673 AF |
601 | return err; |
602 | } | |
603 | ||
617ba13b MC |
604 | case EXT4_IOC_GROUP_ADD: { |
605 | struct ext4_new_group_data input; | |
ac046f1d | 606 | int err, err2=0; |
ac27a0ec | 607 | |
8f82f840 YY |
608 | err = ext4_resize_begin(sb); |
609 | if (err) | |
610 | return err; | |
ac27a0ec | 611 | |
617ba13b | 612 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
014a1770 DH |
613 | sizeof(input))) { |
614 | err = -EFAULT; | |
615 | goto group_add_out; | |
616 | } | |
ac27a0ec | 617 | |
e2b911c5 | 618 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
619 | ext4_msg(sb, KERN_ERR, |
620 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
621 | err = -EOPNOTSUPP; |
622 | goto group_add_out; | |
bab08ab9 TT |
623 | } |
624 | ||
a561be71 | 625 | err = mnt_want_write_file(filp); |
42a74f20 | 626 | if (err) |
014a1770 | 627 | goto group_add_out; |
42a74f20 | 628 | |
617ba13b | 629 | err = ext4_group_add(sb, &input); |
ac046f1d PT |
630 | if (EXT4_SB(sb)->s_journal) { |
631 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
632 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
633 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
634 | } | |
7ffe1ea8 HK |
635 | if (err == 0) |
636 | err = err2; | |
2a79f17e | 637 | mnt_drop_write_file(filp); |
7f511862 TT |
638 | if (!err && ext4_has_group_desc_csum(sb) && |
639 | test_opt(sb, INIT_INODE_TABLE)) | |
640 | err = ext4_register_li_request(sb, input.group); | |
014a1770 | 641 | group_add_out: |
8f82f840 | 642 | ext4_resize_end(sb); |
ac27a0ec DK |
643 | return err; |
644 | } | |
645 | ||
c14c6fd5 | 646 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
647 | { |
648 | int err; | |
2e149670 | 649 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
650 | return -EACCES; |
651 | ||
a561be71 | 652 | err = mnt_want_write_file(filp); |
2a43a878 AK |
653 | if (err) |
654 | return err; | |
655 | /* | |
656 | * inode_mutex prevent write and truncate on the file. | |
657 | * Read still goes through. We take i_data_sem in | |
658 | * ext4_ext_swap_inode_data before we switch the | |
659 | * inode format to prevent read. | |
660 | */ | |
5955102c | 661 | inode_lock((inode)); |
2a43a878 | 662 | err = ext4_ext_migrate(inode); |
5955102c | 663 | inode_unlock((inode)); |
2a79f17e | 664 | mnt_drop_write_file(filp); |
2a43a878 AK |
665 | return err; |
666 | } | |
c14c6fd5 | 667 | |
ccd2506b TT |
668 | case EXT4_IOC_ALLOC_DA_BLKS: |
669 | { | |
670 | int err; | |
2e149670 | 671 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
672 | return -EACCES; |
673 | ||
a561be71 | 674 | err = mnt_want_write_file(filp); |
ccd2506b TT |
675 | if (err) |
676 | return err; | |
677 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 678 | mnt_drop_write_file(filp); |
ccd2506b TT |
679 | return err; |
680 | } | |
681 | ||
393d1d1d | 682 | case EXT4_IOC_SWAP_BOOT: |
3e67cfad DM |
683 | { |
684 | int err; | |
393d1d1d DTB |
685 | if (!(filp->f_mode & FMODE_WRITE)) |
686 | return -EBADF; | |
3e67cfad DM |
687 | err = mnt_want_write_file(filp); |
688 | if (err) | |
689 | return err; | |
690 | err = swap_inode_boot_loader(sb, inode); | |
691 | mnt_drop_write_file(filp); | |
692 | return err; | |
693 | } | |
393d1d1d | 694 | |
19c5246d YY |
695 | case EXT4_IOC_RESIZE_FS: { |
696 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 697 | int err = 0, err2 = 0; |
7f511862 | 698 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d | 699 | |
e2b911c5 | 700 | if (ext4_has_feature_bigalloc(sb)) { |
19c5246d YY |
701 | ext4_msg(sb, KERN_ERR, |
702 | "Online resizing not (yet) supported with bigalloc"); | |
703 | return -EOPNOTSUPP; | |
704 | } | |
705 | ||
19c5246d YY |
706 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
707 | sizeof(__u64))) { | |
708 | return -EFAULT; | |
709 | } | |
710 | ||
19c5246d YY |
711 | err = ext4_resize_begin(sb); |
712 | if (err) | |
713 | return err; | |
714 | ||
8cae6f71 | 715 | err = mnt_want_write_file(filp); |
19c5246d YY |
716 | if (err) |
717 | goto resizefs_out; | |
718 | ||
719 | err = ext4_resize_fs(sb, n_blocks_count); | |
720 | if (EXT4_SB(sb)->s_journal) { | |
721 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
722 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
723 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
724 | } | |
725 | if (err == 0) | |
726 | err = err2; | |
8cae6f71 | 727 | mnt_drop_write_file(filp); |
7f511862 TT |
728 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
729 | ext4_has_group_desc_csum(sb) && | |
730 | test_opt(sb, INIT_INODE_TABLE)) | |
731 | err = ext4_register_li_request(sb, o_group); | |
732 | ||
19c5246d YY |
733 | resizefs_out: |
734 | ext4_resize_end(sb); | |
735 | return err; | |
736 | } | |
737 | ||
e681c047 LC |
738 | case FITRIM: |
739 | { | |
41431792 | 740 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
e681c047 LC |
741 | struct fstrim_range range; |
742 | int ret = 0; | |
743 | ||
744 | if (!capable(CAP_SYS_ADMIN)) | |
745 | return -EPERM; | |
746 | ||
41431792 LC |
747 | if (!blk_queue_discard(q)) |
748 | return -EOPNOTSUPP; | |
749 | ||
e6705f7c | 750 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
751 | sizeof(range))) |
752 | return -EFAULT; | |
753 | ||
5c2ed62f LC |
754 | range.minlen = max((unsigned int)range.minlen, |
755 | q->limits.discard_granularity); | |
e681c047 LC |
756 | ret = ext4_trim_fs(sb, &range); |
757 | if (ret < 0) | |
758 | return ret; | |
759 | ||
e6705f7c | 760 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
761 | sizeof(range))) |
762 | return -EFAULT; | |
763 | ||
764 | return 0; | |
765 | } | |
7869a4a6 TT |
766 | case EXT4_IOC_PRECACHE_EXTENTS: |
767 | return ext4_ext_precache(inode); | |
9bd8212f MH |
768 | case EXT4_IOC_SET_ENCRYPTION_POLICY: { |
769 | #ifdef CONFIG_EXT4_FS_ENCRYPTION | |
a7550b30 | 770 | struct fscrypt_policy policy; |
9bd8212f | 771 | |
9a200d07 RW |
772 | if (!ext4_has_feature_encrypt(sb)) |
773 | return -EOPNOTSUPP; | |
774 | ||
9bd8212f | 775 | if (copy_from_user(&policy, |
a7550b30 JK |
776 | (struct fscrypt_policy __user *)arg, |
777 | sizeof(policy))) | |
778 | return -EFAULT; | |
ba63f23d | 779 | return fscrypt_process_policy(filp, &policy); |
9bd8212f MH |
780 | #else |
781 | return -EOPNOTSUPP; | |
782 | #endif | |
783 | } | |
784 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: { | |
785 | int err, err2; | |
786 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
787 | handle_t *handle; | |
788 | ||
789 | if (!ext4_sb_has_crypto(sb)) | |
790 | return -EOPNOTSUPP; | |
791 | if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { | |
792 | err = mnt_want_write_file(filp); | |
793 | if (err) | |
794 | return err; | |
795 | handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); | |
796 | if (IS_ERR(handle)) { | |
797 | err = PTR_ERR(handle); | |
798 | goto pwsalt_err_exit; | |
799 | } | |
800 | err = ext4_journal_get_write_access(handle, sbi->s_sbh); | |
801 | if (err) | |
802 | goto pwsalt_err_journal; | |
803 | generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); | |
804 | err = ext4_handle_dirty_metadata(handle, NULL, | |
805 | sbi->s_sbh); | |
806 | pwsalt_err_journal: | |
807 | err2 = ext4_journal_stop(handle); | |
808 | if (err2 && !err) | |
809 | err = err2; | |
810 | pwsalt_err_exit: | |
811 | mnt_drop_write_file(filp); | |
812 | if (err) | |
813 | return err; | |
814 | } | |
b4ab9e29 FF |
815 | if (copy_to_user((void __user *) arg, |
816 | sbi->s_es->s_encrypt_pw_salt, 16)) | |
9bd8212f MH |
817 | return -EFAULT; |
818 | return 0; | |
819 | } | |
820 | case EXT4_IOC_GET_ENCRYPTION_POLICY: { | |
821 | #ifdef CONFIG_EXT4_FS_ENCRYPTION | |
a7550b30 | 822 | struct fscrypt_policy policy; |
9bd8212f MH |
823 | int err = 0; |
824 | ||
825 | if (!ext4_encrypted_inode(inode)) | |
826 | return -ENOENT; | |
a7550b30 | 827 | err = fscrypt_get_policy(inode, &policy); |
9bd8212f MH |
828 | if (err) |
829 | return err; | |
b4ab9e29 | 830 | if (copy_to_user((void __user *)arg, &policy, sizeof(policy))) |
9bd8212f MH |
831 | return -EFAULT; |
832 | return 0; | |
833 | #else | |
834 | return -EOPNOTSUPP; | |
835 | #endif | |
836 | } | |
9b7365fc LX |
837 | case EXT4_IOC_FSGETXATTR: |
838 | { | |
839 | struct fsxattr fa; | |
840 | ||
841 | memset(&fa, 0, sizeof(struct fsxattr)); | |
842 | ext4_get_inode_flags(ei); | |
843 | fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE); | |
844 | ||
0b7b7779 | 845 | if (ext4_has_feature_project(inode->i_sb)) { |
9b7365fc LX |
846 | fa.fsx_projid = (__u32)from_kprojid(&init_user_ns, |
847 | EXT4_I(inode)->i_projid); | |
848 | } | |
849 | ||
850 | if (copy_to_user((struct fsxattr __user *)arg, | |
851 | &fa, sizeof(fa))) | |
852 | return -EFAULT; | |
853 | return 0; | |
854 | } | |
855 | case EXT4_IOC_FSSETXATTR: | |
856 | { | |
857 | struct fsxattr fa; | |
858 | int err; | |
859 | ||
860 | if (copy_from_user(&fa, (struct fsxattr __user *)arg, | |
861 | sizeof(fa))) | |
862 | return -EFAULT; | |
863 | ||
864 | /* Make sure caller has proper permission */ | |
865 | if (!inode_owner_or_capable(inode)) | |
866 | return -EACCES; | |
867 | ||
868 | err = mnt_want_write_file(filp); | |
869 | if (err) | |
870 | return err; | |
871 | ||
872 | flags = ext4_xflags_to_iflags(fa.fsx_xflags); | |
873 | flags = ext4_mask_flags(inode->i_mode, flags); | |
874 | ||
5955102c | 875 | inode_lock(inode); |
9b7365fc LX |
876 | flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) | |
877 | (flags & EXT4_FL_XFLAG_VISIBLE); | |
878 | err = ext4_ioctl_setflags(inode, flags); | |
5955102c | 879 | inode_unlock(inode); |
9b7365fc LX |
880 | mnt_drop_write_file(filp); |
881 | if (err) | |
882 | return err; | |
883 | ||
884 | err = ext4_ioctl_setproject(filp, fa.fsx_projid); | |
885 | if (err) | |
886 | return err; | |
887 | ||
888 | return 0; | |
889 | } | |
ac27a0ec DK |
890 | default: |
891 | return -ENOTTY; | |
892 | } | |
893 | } | |
894 | ||
895 | #ifdef CONFIG_COMPAT | |
617ba13b | 896 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 897 | { |
ac27a0ec DK |
898 | /* These are just misnamed, they actually get/put from/to user an int */ |
899 | switch (cmd) { | |
617ba13b MC |
900 | case EXT4_IOC32_GETFLAGS: |
901 | cmd = EXT4_IOC_GETFLAGS; | |
ac27a0ec | 902 | break; |
617ba13b MC |
903 | case EXT4_IOC32_SETFLAGS: |
904 | cmd = EXT4_IOC_SETFLAGS; | |
ac27a0ec | 905 | break; |
617ba13b MC |
906 | case EXT4_IOC32_GETVERSION: |
907 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 908 | break; |
617ba13b MC |
909 | case EXT4_IOC32_SETVERSION: |
910 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 911 | break; |
617ba13b MC |
912 | case EXT4_IOC32_GROUP_EXTEND: |
913 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 914 | break; |
617ba13b MC |
915 | case EXT4_IOC32_GETVERSION_OLD: |
916 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 917 | break; |
617ba13b MC |
918 | case EXT4_IOC32_SETVERSION_OLD: |
919 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 920 | break; |
617ba13b MC |
921 | case EXT4_IOC32_GETRSVSZ: |
922 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 923 | break; |
617ba13b MC |
924 | case EXT4_IOC32_SETRSVSZ: |
925 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 926 | break; |
4d92dc0f BH |
927 | case EXT4_IOC32_GROUP_ADD: { |
928 | struct compat_ext4_new_group_input __user *uinput; | |
929 | struct ext4_new_group_input input; | |
930 | mm_segment_t old_fs; | |
931 | int err; | |
932 | ||
933 | uinput = compat_ptr(arg); | |
934 | err = get_user(input.group, &uinput->group); | |
935 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
936 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
937 | err |= get_user(input.inode_table, &uinput->inode_table); | |
938 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
939 | err |= get_user(input.reserved_blocks, | |
940 | &uinput->reserved_blocks); | |
941 | if (err) | |
942 | return -EFAULT; | |
943 | old_fs = get_fs(); | |
944 | set_fs(KERNEL_DS); | |
945 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, | |
946 | (unsigned long) &input); | |
947 | set_fs(old_fs); | |
948 | return err; | |
949 | } | |
b684b2ee | 950 | case EXT4_IOC_MOVE_EXT: |
19c5246d | 951 | case EXT4_IOC_RESIZE_FS: |
7869a4a6 | 952 | case EXT4_IOC_PRECACHE_EXTENTS: |
9bd8212f MH |
953 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
954 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: | |
955 | case EXT4_IOC_GET_ENCRYPTION_POLICY: | |
b684b2ee | 956 | break; |
ac27a0ec DK |
957 | default: |
958 | return -ENOIOCTLCMD; | |
959 | } | |
5cdd7b2d | 960 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
961 | } |
962 | #endif |