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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> |
7c0f6ba6 | 18 | #include <linux/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 | ||
eeca7ea1 | 156 | inode->i_ctime = inode_bl->i_ctime = current_time(inode); |
393d1d1d DTB |
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 | ||
ba679017 | 194 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
9bd8212f MH |
195 | static int uuid_is_zero(__u8 u[16]) |
196 | { | |
197 | int i; | |
198 | ||
199 | for (i = 0; i < 16; i++) | |
200 | if (u[i]) | |
201 | return 0; | |
202 | return 1; | |
203 | } | |
ba679017 | 204 | #endif |
9bd8212f | 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)) { | |
acc94812 | 241 | if (!ns_capable(inode->i_sb->s_user_ns, CAP_SYS_RESOURCE)) |
9b7365fc LX |
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 | } | |
2c98eb5e TT |
253 | } else if (oldflags & EXT4_EOFBLOCKS_FL) { |
254 | err = ext4_truncate(inode); | |
255 | if (err) | |
256 | goto flags_out; | |
257 | } | |
9b7365fc LX |
258 | |
259 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); | |
260 | if (IS_ERR(handle)) { | |
261 | err = PTR_ERR(handle); | |
262 | goto flags_out; | |
263 | } | |
264 | if (IS_SYNC(inode)) | |
265 | ext4_handle_sync(handle); | |
266 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
267 | if (err) | |
268 | goto flags_err; | |
269 | ||
270 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { | |
271 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
272 | continue; | |
f8011d93 JK |
273 | /* These flags get special treatment later */ |
274 | if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL) | |
275 | continue; | |
9b7365fc LX |
276 | if (mask & flags) |
277 | ext4_set_inode_flag(inode, i); | |
278 | else | |
279 | ext4_clear_inode_flag(inode, i); | |
280 | } | |
281 | ||
282 | ext4_set_inode_flags(inode); | |
eeca7ea1 | 283 | inode->i_ctime = current_time(inode); |
9b7365fc LX |
284 | |
285 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
286 | flags_err: | |
287 | ext4_journal_stop(handle); | |
288 | if (err) | |
289 | goto flags_out; | |
290 | ||
291 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) | |
292 | err = ext4_change_inode_journal_flag(inode, jflag); | |
293 | if (err) | |
294 | goto flags_out; | |
295 | if (migrate) { | |
296 | if (flags & EXT4_EXTENTS_FL) | |
297 | err = ext4_ext_migrate(inode); | |
298 | else | |
299 | err = ext4_ind_migrate(inode); | |
300 | } | |
301 | ||
302 | flags_out: | |
303 | return err; | |
304 | } | |
305 | ||
306 | #ifdef CONFIG_QUOTA | |
307 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
308 | { | |
309 | struct inode *inode = file_inode(filp); | |
310 | struct super_block *sb = inode->i_sb; | |
311 | struct ext4_inode_info *ei = EXT4_I(inode); | |
312 | int err, rc; | |
313 | handle_t *handle; | |
314 | kprojid_t kprojid; | |
315 | struct ext4_iloc iloc; | |
316 | struct ext4_inode *raw_inode; | |
079788d0 | 317 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
9b7365fc | 318 | |
0b7b7779 | 319 | if (!ext4_has_feature_project(sb)) { |
9b7365fc LX |
320 | if (projid != EXT4_DEF_PROJID) |
321 | return -EOPNOTSUPP; | |
322 | else | |
323 | return 0; | |
324 | } | |
325 | ||
326 | if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) | |
327 | return -EOPNOTSUPP; | |
328 | ||
acc94812 | 329 | kprojid = make_kprojid(sb->s_user_ns, (projid_t)projid); |
9b7365fc | 330 | |
acc94812 SF |
331 | if (!projid_valid(kprojid)) |
332 | return -EOVERFLOW; | |
9b7365fc LX |
333 | if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) |
334 | return 0; | |
335 | ||
336 | err = mnt_want_write_file(filp); | |
337 | if (err) | |
338 | return err; | |
339 | ||
340 | err = -EPERM; | |
5955102c | 341 | inode_lock(inode); |
9b7365fc LX |
342 | /* Is it quota file? Do not allow user to mess with it */ |
343 | if (IS_NOQUOTA(inode)) | |
344 | goto out_unlock; | |
345 | ||
346 | err = ext4_get_inode_loc(inode, &iloc); | |
347 | if (err) | |
348 | goto out_unlock; | |
349 | ||
350 | raw_inode = ext4_raw_inode(&iloc); | |
351 | if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { | |
352 | err = -EOVERFLOW; | |
353 | brelse(iloc.bh); | |
354 | goto out_unlock; | |
355 | } | |
356 | brelse(iloc.bh); | |
357 | ||
358 | dquot_initialize(inode); | |
359 | ||
360 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, | |
361 | EXT4_QUOTA_INIT_BLOCKS(sb) + | |
362 | EXT4_QUOTA_DEL_BLOCKS(sb) + 3); | |
363 | if (IS_ERR(handle)) { | |
364 | err = PTR_ERR(handle); | |
365 | goto out_unlock; | |
366 | } | |
367 | ||
368 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
369 | if (err) | |
370 | goto out_stop; | |
371 | ||
079788d0 WS |
372 | transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); |
373 | if (!IS_ERR(transfer_to[PRJQUOTA])) { | |
374 | err = __dquot_transfer(inode, transfer_to); | |
375 | dqput(transfer_to[PRJQUOTA]); | |
376 | if (err) | |
377 | goto out_dirty; | |
9b7365fc | 378 | } |
079788d0 | 379 | |
9b7365fc | 380 | EXT4_I(inode)->i_projid = kprojid; |
eeca7ea1 | 381 | inode->i_ctime = current_time(inode); |
9b7365fc LX |
382 | out_dirty: |
383 | rc = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
384 | if (!err) | |
385 | err = rc; | |
386 | out_stop: | |
387 | ext4_journal_stop(handle); | |
388 | out_unlock: | |
5955102c | 389 | inode_unlock(inode); |
9b7365fc LX |
390 | mnt_drop_write_file(filp); |
391 | return err; | |
392 | } | |
393 | #else | |
394 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
395 | { | |
396 | if (projid != EXT4_DEF_PROJID) | |
397 | return -EOPNOTSUPP; | |
398 | return 0; | |
399 | } | |
400 | #endif | |
401 | ||
402 | /* Transfer internal flags to xflags */ | |
403 | static inline __u32 ext4_iflags_to_xflags(unsigned long iflags) | |
404 | { | |
405 | __u32 xflags = 0; | |
406 | ||
407 | if (iflags & EXT4_SYNC_FL) | |
408 | xflags |= FS_XFLAG_SYNC; | |
409 | if (iflags & EXT4_IMMUTABLE_FL) | |
410 | xflags |= FS_XFLAG_IMMUTABLE; | |
411 | if (iflags & EXT4_APPEND_FL) | |
412 | xflags |= FS_XFLAG_APPEND; | |
413 | if (iflags & EXT4_NODUMP_FL) | |
414 | xflags |= FS_XFLAG_NODUMP; | |
415 | if (iflags & EXT4_NOATIME_FL) | |
416 | xflags |= FS_XFLAG_NOATIME; | |
417 | if (iflags & EXT4_PROJINHERIT_FL) | |
418 | xflags |= FS_XFLAG_PROJINHERIT; | |
419 | return xflags; | |
420 | } | |
421 | ||
d14e7683 JK |
422 | #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \ |
423 | FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \ | |
424 | FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT) | |
425 | ||
9b7365fc LX |
426 | /* Transfer xflags flags to internal */ |
427 | static inline unsigned long ext4_xflags_to_iflags(__u32 xflags) | |
428 | { | |
429 | unsigned long iflags = 0; | |
430 | ||
431 | if (xflags & FS_XFLAG_SYNC) | |
432 | iflags |= EXT4_SYNC_FL; | |
433 | if (xflags & FS_XFLAG_IMMUTABLE) | |
434 | iflags |= EXT4_IMMUTABLE_FL; | |
435 | if (xflags & FS_XFLAG_APPEND) | |
436 | iflags |= EXT4_APPEND_FL; | |
437 | if (xflags & FS_XFLAG_NODUMP) | |
438 | iflags |= EXT4_NODUMP_FL; | |
439 | if (xflags & FS_XFLAG_NOATIME) | |
440 | iflags |= EXT4_NOATIME_FL; | |
441 | if (xflags & FS_XFLAG_PROJINHERIT) | |
442 | iflags |= EXT4_PROJINHERIT_FL; | |
443 | ||
444 | return iflags; | |
445 | } | |
446 | ||
5cdd7b2d | 447 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 448 | { |
496ad9aa | 449 | struct inode *inode = file_inode(filp); |
bab08ab9 | 450 | struct super_block *sb = inode->i_sb; |
617ba13b | 451 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 452 | unsigned int flags; |
ac27a0ec | 453 | |
af5bc92d | 454 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
455 | |
456 | switch (cmd) { | |
617ba13b | 457 | case EXT4_IOC_GETFLAGS: |
ff9ddf7e | 458 | ext4_get_inode_flags(ei); |
617ba13b | 459 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
ac27a0ec | 460 | return put_user(flags, (int __user *) arg); |
617ba13b | 461 | case EXT4_IOC_SETFLAGS: { |
9b7365fc | 462 | int err; |
ac27a0ec | 463 | |
2e149670 | 464 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
465 | return -EACCES; |
466 | ||
467 | if (get_user(flags, (int __user *) arg)) | |
468 | return -EFAULT; | |
469 | ||
d14e7683 JK |
470 | if (flags & ~EXT4_FL_USER_VISIBLE) |
471 | return -EOPNOTSUPP; | |
472 | /* | |
473 | * chattr(1) grabs flags via GETFLAGS, modifies the result and | |
474 | * passes that to SETFLAGS. So we cannot easily make SETFLAGS | |
475 | * more restrictive than just silently masking off visible but | |
476 | * not settable flags as we always did. | |
477 | */ | |
478 | flags &= EXT4_FL_USER_MODIFIABLE; | |
479 | if (ext4_mask_flags(inode->i_mode, flags) != flags) | |
480 | return -EOPNOTSUPP; | |
481 | ||
a561be71 | 482 | err = mnt_want_write_file(filp); |
42a74f20 DH |
483 | if (err) |
484 | return err; | |
485 | ||
5955102c | 486 | inode_lock(inode); |
9b7365fc | 487 | err = ext4_ioctl_setflags(inode, flags); |
5955102c | 488 | inode_unlock(inode); |
2a79f17e | 489 | mnt_drop_write_file(filp); |
ac27a0ec DK |
490 | return err; |
491 | } | |
617ba13b MC |
492 | case EXT4_IOC_GETVERSION: |
493 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 494 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
495 | case EXT4_IOC_SETVERSION: |
496 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 497 | handle_t *handle; |
617ba13b | 498 | struct ext4_iloc iloc; |
ac27a0ec DK |
499 | __u32 generation; |
500 | int err; | |
501 | ||
2e149670 | 502 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 503 | return -EPERM; |
42a74f20 | 504 | |
9aa5d32b | 505 | if (ext4_has_metadata_csum(inode->i_sb)) { |
814525f4 DW |
506 | ext4_warning(sb, "Setting inode version is not " |
507 | "supported with metadata_csum enabled."); | |
508 | return -ENOTTY; | |
509 | } | |
510 | ||
a561be71 | 511 | err = mnt_want_write_file(filp); |
42a74f20 DH |
512 | if (err) |
513 | return err; | |
514 | if (get_user(generation, (int __user *) arg)) { | |
515 | err = -EFAULT; | |
516 | goto setversion_out; | |
517 | } | |
ac27a0ec | 518 | |
5955102c | 519 | inode_lock(inode); |
9924a92a | 520 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
521 | if (IS_ERR(handle)) { |
522 | err = PTR_ERR(handle); | |
6c2155b9 | 523 | goto unlock_out; |
42a74f20 | 524 | } |
617ba13b | 525 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 526 | if (err == 0) { |
eeca7ea1 | 527 | inode->i_ctime = current_time(inode); |
ac27a0ec | 528 | inode->i_generation = generation; |
617ba13b | 529 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 530 | } |
617ba13b | 531 | ext4_journal_stop(handle); |
6c2155b9 DH |
532 | |
533 | unlock_out: | |
5955102c | 534 | inode_unlock(inode); |
42a74f20 | 535 | setversion_out: |
2a79f17e | 536 | mnt_drop_write_file(filp); |
ac27a0ec DK |
537 | return err; |
538 | } | |
617ba13b MC |
539 | case EXT4_IOC_GROUP_EXTEND: { |
540 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 541 | int err, err2=0; |
ac27a0ec | 542 | |
8f82f840 YY |
543 | err = ext4_resize_begin(sb); |
544 | if (err) | |
545 | return err; | |
ac27a0ec | 546 | |
014a1770 DH |
547 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
548 | err = -EFAULT; | |
549 | goto group_extend_out; | |
550 | } | |
ac27a0ec | 551 | |
e2b911c5 | 552 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
553 | ext4_msg(sb, KERN_ERR, |
554 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
555 | err = -EOPNOTSUPP; |
556 | goto group_extend_out; | |
bab08ab9 TT |
557 | } |
558 | ||
a561be71 | 559 | err = mnt_want_write_file(filp); |
42a74f20 | 560 | if (err) |
014a1770 | 561 | goto group_extend_out; |
42a74f20 | 562 | |
617ba13b | 563 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
564 | if (EXT4_SB(sb)->s_journal) { |
565 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
566 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
567 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
568 | } | |
7ffe1ea8 HK |
569 | if (err == 0) |
570 | err = err2; | |
2a79f17e | 571 | mnt_drop_write_file(filp); |
014a1770 | 572 | group_extend_out: |
8f82f840 | 573 | ext4_resize_end(sb); |
ac27a0ec DK |
574 | return err; |
575 | } | |
748de673 AF |
576 | |
577 | case EXT4_IOC_MOVE_EXT: { | |
578 | struct move_extent me; | |
2903ff01 AV |
579 | struct fd donor; |
580 | int err; | |
748de673 | 581 | |
4a58579b AF |
582 | if (!(filp->f_mode & FMODE_READ) || |
583 | !(filp->f_mode & FMODE_WRITE)) | |
584 | return -EBADF; | |
585 | ||
748de673 AF |
586 | if (copy_from_user(&me, |
587 | (struct move_extent __user *)arg, sizeof(me))) | |
588 | return -EFAULT; | |
4a58579b | 589 | me.moved_len = 0; |
748de673 | 590 | |
2903ff01 AV |
591 | donor = fdget(me.donor_fd); |
592 | if (!donor.file) | |
748de673 AF |
593 | return -EBADF; |
594 | ||
2903ff01 | 595 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
596 | err = -EBADF; |
597 | goto mext_out; | |
748de673 AF |
598 | } |
599 | ||
e2b911c5 | 600 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
601 | ext4_msg(sb, KERN_ERR, |
602 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
603 | err = -EOPNOTSUPP; |
604 | goto mext_out; | |
73f34a5e RZ |
605 | } else if (IS_DAX(inode)) { |
606 | ext4_msg(sb, KERN_ERR, | |
607 | "Online defrag not supported with DAX"); | |
608 | err = -EOPNOTSUPP; | |
609 | goto mext_out; | |
bab08ab9 TT |
610 | } |
611 | ||
a561be71 | 612 | err = mnt_want_write_file(filp); |
4a58579b AF |
613 | if (err) |
614 | goto mext_out; | |
615 | ||
2903ff01 | 616 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 617 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 618 | mnt_drop_write_file(filp); |
748de673 | 619 | |
60e6679e | 620 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 621 | &me, sizeof(me))) |
4a58579b AF |
622 | err = -EFAULT; |
623 | mext_out: | |
2903ff01 | 624 | fdput(donor); |
748de673 AF |
625 | return err; |
626 | } | |
627 | ||
617ba13b MC |
628 | case EXT4_IOC_GROUP_ADD: { |
629 | struct ext4_new_group_data input; | |
ac046f1d | 630 | int err, err2=0; |
ac27a0ec | 631 | |
8f82f840 YY |
632 | err = ext4_resize_begin(sb); |
633 | if (err) | |
634 | return err; | |
ac27a0ec | 635 | |
617ba13b | 636 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
014a1770 DH |
637 | sizeof(input))) { |
638 | err = -EFAULT; | |
639 | goto group_add_out; | |
640 | } | |
ac27a0ec | 641 | |
e2b911c5 | 642 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
643 | ext4_msg(sb, KERN_ERR, |
644 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
645 | err = -EOPNOTSUPP; |
646 | goto group_add_out; | |
bab08ab9 TT |
647 | } |
648 | ||
a561be71 | 649 | err = mnt_want_write_file(filp); |
42a74f20 | 650 | if (err) |
014a1770 | 651 | goto group_add_out; |
42a74f20 | 652 | |
617ba13b | 653 | err = ext4_group_add(sb, &input); |
ac046f1d PT |
654 | if (EXT4_SB(sb)->s_journal) { |
655 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
656 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
657 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
658 | } | |
7ffe1ea8 HK |
659 | if (err == 0) |
660 | err = err2; | |
2a79f17e | 661 | mnt_drop_write_file(filp); |
7f511862 TT |
662 | if (!err && ext4_has_group_desc_csum(sb) && |
663 | test_opt(sb, INIT_INODE_TABLE)) | |
664 | err = ext4_register_li_request(sb, input.group); | |
014a1770 | 665 | group_add_out: |
8f82f840 | 666 | ext4_resize_end(sb); |
ac27a0ec DK |
667 | return err; |
668 | } | |
669 | ||
c14c6fd5 | 670 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
671 | { |
672 | int err; | |
2e149670 | 673 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
674 | return -EACCES; |
675 | ||
a561be71 | 676 | err = mnt_want_write_file(filp); |
2a43a878 AK |
677 | if (err) |
678 | return err; | |
679 | /* | |
680 | * inode_mutex prevent write and truncate on the file. | |
681 | * Read still goes through. We take i_data_sem in | |
682 | * ext4_ext_swap_inode_data before we switch the | |
683 | * inode format to prevent read. | |
684 | */ | |
5955102c | 685 | inode_lock((inode)); |
2a43a878 | 686 | err = ext4_ext_migrate(inode); |
5955102c | 687 | inode_unlock((inode)); |
2a79f17e | 688 | mnt_drop_write_file(filp); |
2a43a878 AK |
689 | return err; |
690 | } | |
c14c6fd5 | 691 | |
ccd2506b TT |
692 | case EXT4_IOC_ALLOC_DA_BLKS: |
693 | { | |
694 | int err; | |
2e149670 | 695 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
696 | return -EACCES; |
697 | ||
a561be71 | 698 | err = mnt_want_write_file(filp); |
ccd2506b TT |
699 | if (err) |
700 | return err; | |
701 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 702 | mnt_drop_write_file(filp); |
ccd2506b TT |
703 | return err; |
704 | } | |
705 | ||
393d1d1d | 706 | case EXT4_IOC_SWAP_BOOT: |
3e67cfad DM |
707 | { |
708 | int err; | |
393d1d1d DTB |
709 | if (!(filp->f_mode & FMODE_WRITE)) |
710 | return -EBADF; | |
3e67cfad DM |
711 | err = mnt_want_write_file(filp); |
712 | if (err) | |
713 | return err; | |
714 | err = swap_inode_boot_loader(sb, inode); | |
715 | mnt_drop_write_file(filp); | |
716 | return err; | |
717 | } | |
393d1d1d | 718 | |
19c5246d YY |
719 | case EXT4_IOC_RESIZE_FS: { |
720 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 721 | int err = 0, err2 = 0; |
7f511862 | 722 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d | 723 | |
e2b911c5 | 724 | if (ext4_has_feature_bigalloc(sb)) { |
19c5246d YY |
725 | ext4_msg(sb, KERN_ERR, |
726 | "Online resizing not (yet) supported with bigalloc"); | |
727 | return -EOPNOTSUPP; | |
728 | } | |
729 | ||
19c5246d YY |
730 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
731 | sizeof(__u64))) { | |
732 | return -EFAULT; | |
733 | } | |
734 | ||
19c5246d YY |
735 | err = ext4_resize_begin(sb); |
736 | if (err) | |
737 | return err; | |
738 | ||
8cae6f71 | 739 | err = mnt_want_write_file(filp); |
19c5246d YY |
740 | if (err) |
741 | goto resizefs_out; | |
742 | ||
743 | err = ext4_resize_fs(sb, n_blocks_count); | |
744 | if (EXT4_SB(sb)->s_journal) { | |
745 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
746 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
747 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
748 | } | |
749 | if (err == 0) | |
750 | err = err2; | |
8cae6f71 | 751 | mnt_drop_write_file(filp); |
7f511862 TT |
752 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
753 | ext4_has_group_desc_csum(sb) && | |
754 | test_opt(sb, INIT_INODE_TABLE)) | |
755 | err = ext4_register_li_request(sb, o_group); | |
756 | ||
19c5246d YY |
757 | resizefs_out: |
758 | ext4_resize_end(sb); | |
759 | return err; | |
760 | } | |
761 | ||
e681c047 LC |
762 | case FITRIM: |
763 | { | |
41431792 | 764 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
e681c047 LC |
765 | struct fstrim_range range; |
766 | int ret = 0; | |
767 | ||
acc94812 | 768 | if (!ns_capable(sb->s_user_ns, CAP_SYS_ADMIN)) |
e681c047 LC |
769 | return -EPERM; |
770 | ||
41431792 LC |
771 | if (!blk_queue_discard(q)) |
772 | return -EOPNOTSUPP; | |
773 | ||
e6705f7c | 774 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
775 | sizeof(range))) |
776 | return -EFAULT; | |
777 | ||
5c2ed62f LC |
778 | range.minlen = max((unsigned int)range.minlen, |
779 | q->limits.discard_granularity); | |
e681c047 LC |
780 | ret = ext4_trim_fs(sb, &range); |
781 | if (ret < 0) | |
782 | return ret; | |
783 | ||
e6705f7c | 784 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
785 | sizeof(range))) |
786 | return -EFAULT; | |
787 | ||
788 | return 0; | |
789 | } | |
7869a4a6 TT |
790 | case EXT4_IOC_PRECACHE_EXTENTS: |
791 | return ext4_ext_precache(inode); | |
9bd8212f | 792 | |
db717d8e | 793 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
9a200d07 RW |
794 | if (!ext4_has_feature_encrypt(sb)) |
795 | return -EOPNOTSUPP; | |
db717d8e | 796 | return fscrypt_ioctl_set_policy(filp, (const void __user *)arg); |
9a200d07 | 797 | |
9bd8212f | 798 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: { |
ba679017 | 799 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
9bd8212f MH |
800 | int err, err2; |
801 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
802 | handle_t *handle; | |
803 | ||
35997d1c | 804 | if (!ext4_has_feature_encrypt(sb)) |
9bd8212f MH |
805 | return -EOPNOTSUPP; |
806 | if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { | |
807 | err = mnt_want_write_file(filp); | |
808 | if (err) | |
809 | return err; | |
810 | handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); | |
811 | if (IS_ERR(handle)) { | |
812 | err = PTR_ERR(handle); | |
813 | goto pwsalt_err_exit; | |
814 | } | |
815 | err = ext4_journal_get_write_access(handle, sbi->s_sbh); | |
816 | if (err) | |
817 | goto pwsalt_err_journal; | |
818 | generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); | |
819 | err = ext4_handle_dirty_metadata(handle, NULL, | |
820 | sbi->s_sbh); | |
821 | pwsalt_err_journal: | |
822 | err2 = ext4_journal_stop(handle); | |
823 | if (err2 && !err) | |
824 | err = err2; | |
825 | pwsalt_err_exit: | |
826 | mnt_drop_write_file(filp); | |
827 | if (err) | |
828 | return err; | |
829 | } | |
b4ab9e29 FF |
830 | if (copy_to_user((void __user *) arg, |
831 | sbi->s_es->s_encrypt_pw_salt, 16)) | |
9bd8212f MH |
832 | return -EFAULT; |
833 | return 0; | |
ba679017 EB |
834 | #else |
835 | return -EOPNOTSUPP; | |
836 | #endif | |
9bd8212f | 837 | } |
db717d8e EB |
838 | case EXT4_IOC_GET_ENCRYPTION_POLICY: |
839 | return fscrypt_ioctl_get_policy(filp, (void __user *)arg); | |
9bd8212f | 840 | |
9b7365fc LX |
841 | case EXT4_IOC_FSGETXATTR: |
842 | { | |
843 | struct fsxattr fa; | |
844 | ||
845 | memset(&fa, 0, sizeof(struct fsxattr)); | |
846 | ext4_get_inode_flags(ei); | |
847 | fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE); | |
848 | ||
0b7b7779 | 849 | if (ext4_has_feature_project(inode->i_sb)) { |
acc94812 | 850 | fa.fsx_projid = (__u32)from_kprojid_munged(sb->s_user_ns, |
9b7365fc LX |
851 | EXT4_I(inode)->i_projid); |
852 | } | |
853 | ||
854 | if (copy_to_user((struct fsxattr __user *)arg, | |
855 | &fa, sizeof(fa))) | |
856 | return -EFAULT; | |
857 | return 0; | |
858 | } | |
859 | case EXT4_IOC_FSSETXATTR: | |
860 | { | |
861 | struct fsxattr fa; | |
862 | int err; | |
863 | ||
864 | if (copy_from_user(&fa, (struct fsxattr __user *)arg, | |
865 | sizeof(fa))) | |
866 | return -EFAULT; | |
867 | ||
868 | /* Make sure caller has proper permission */ | |
869 | if (!inode_owner_or_capable(inode)) | |
870 | return -EACCES; | |
871 | ||
d14e7683 JK |
872 | if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS) |
873 | return -EOPNOTSUPP; | |
874 | ||
875 | flags = ext4_xflags_to_iflags(fa.fsx_xflags); | |
876 | if (ext4_mask_flags(inode->i_mode, flags) != flags) | |
877 | return -EOPNOTSUPP; | |
878 | ||
9b7365fc LX |
879 | err = mnt_want_write_file(filp); |
880 | if (err) | |
881 | return err; | |
882 | ||
5955102c | 883 | inode_lock(inode); |
9b7365fc LX |
884 | flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) | |
885 | (flags & EXT4_FL_XFLAG_VISIBLE); | |
886 | err = ext4_ioctl_setflags(inode, flags); | |
5955102c | 887 | inode_unlock(inode); |
9b7365fc LX |
888 | mnt_drop_write_file(filp); |
889 | if (err) | |
890 | return err; | |
891 | ||
892 | err = ext4_ioctl_setproject(filp, fa.fsx_projid); | |
893 | if (err) | |
894 | return err; | |
895 | ||
896 | return 0; | |
897 | } | |
ac27a0ec DK |
898 | default: |
899 | return -ENOTTY; | |
900 | } | |
901 | } | |
902 | ||
903 | #ifdef CONFIG_COMPAT | |
617ba13b | 904 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 905 | { |
ac27a0ec DK |
906 | /* These are just misnamed, they actually get/put from/to user an int */ |
907 | switch (cmd) { | |
617ba13b MC |
908 | case EXT4_IOC32_GETFLAGS: |
909 | cmd = EXT4_IOC_GETFLAGS; | |
ac27a0ec | 910 | break; |
617ba13b MC |
911 | case EXT4_IOC32_SETFLAGS: |
912 | cmd = EXT4_IOC_SETFLAGS; | |
ac27a0ec | 913 | break; |
617ba13b MC |
914 | case EXT4_IOC32_GETVERSION: |
915 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 916 | break; |
617ba13b MC |
917 | case EXT4_IOC32_SETVERSION: |
918 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 919 | break; |
617ba13b MC |
920 | case EXT4_IOC32_GROUP_EXTEND: |
921 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 922 | break; |
617ba13b MC |
923 | case EXT4_IOC32_GETVERSION_OLD: |
924 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 925 | break; |
617ba13b MC |
926 | case EXT4_IOC32_SETVERSION_OLD: |
927 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 928 | break; |
617ba13b MC |
929 | case EXT4_IOC32_GETRSVSZ: |
930 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 931 | break; |
617ba13b MC |
932 | case EXT4_IOC32_SETRSVSZ: |
933 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 934 | break; |
4d92dc0f BH |
935 | case EXT4_IOC32_GROUP_ADD: { |
936 | struct compat_ext4_new_group_input __user *uinput; | |
937 | struct ext4_new_group_input input; | |
938 | mm_segment_t old_fs; | |
939 | int err; | |
940 | ||
941 | uinput = compat_ptr(arg); | |
942 | err = get_user(input.group, &uinput->group); | |
943 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
944 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
945 | err |= get_user(input.inode_table, &uinput->inode_table); | |
946 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
947 | err |= get_user(input.reserved_blocks, | |
948 | &uinput->reserved_blocks); | |
949 | if (err) | |
950 | return -EFAULT; | |
951 | old_fs = get_fs(); | |
952 | set_fs(KERNEL_DS); | |
953 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, | |
954 | (unsigned long) &input); | |
955 | set_fs(old_fs); | |
956 | return err; | |
957 | } | |
b684b2ee | 958 | case EXT4_IOC_MOVE_EXT: |
19c5246d | 959 | case EXT4_IOC_RESIZE_FS: |
7869a4a6 | 960 | case EXT4_IOC_PRECACHE_EXTENTS: |
9bd8212f MH |
961 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
962 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: | |
963 | case EXT4_IOC_GET_ENCRYPTION_POLICY: | |
b684b2ee | 964 | break; |
ac27a0ec DK |
965 | default: |
966 | return -ENOIOCTLCMD; | |
967 | } | |
5cdd7b2d | 968 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
969 | } |
970 | #endif |