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> |
ac27a0ec | 17 | #include <asm/uaccess.h> |
3dcf5451 CH |
18 | #include "ext4_jbd2.h" |
19 | #include "ext4.h" | |
ac27a0ec | 20 | |
19c5246d YY |
21 | #define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1) |
22 | ||
393d1d1d DTB |
23 | /** |
24 | * Swap memory between @a and @b for @len bytes. | |
25 | * | |
26 | * @a: pointer to first memory area | |
27 | * @b: pointer to second memory area | |
28 | * @len: number of bytes to swap | |
29 | * | |
30 | */ | |
31 | static void memswap(void *a, void *b, size_t len) | |
32 | { | |
33 | unsigned char *ap, *bp; | |
393d1d1d DTB |
34 | |
35 | ap = (unsigned char *)a; | |
36 | bp = (unsigned char *)b; | |
37 | while (len-- > 0) { | |
4b7e2db5 | 38 | swap(*ap, *bp); |
393d1d1d DTB |
39 | ap++; |
40 | bp++; | |
41 | } | |
42 | } | |
43 | ||
44 | /** | |
45 | * Swap i_data and associated attributes between @inode1 and @inode2. | |
46 | * This function is used for the primary swap between inode1 and inode2 | |
47 | * and also to revert this primary swap in case of errors. | |
48 | * | |
49 | * Therefore you have to make sure, that calling this method twice | |
50 | * will revert all changes. | |
51 | * | |
52 | * @inode1: pointer to first inode | |
53 | * @inode2: pointer to second inode | |
54 | */ | |
55 | static void swap_inode_data(struct inode *inode1, struct inode *inode2) | |
56 | { | |
57 | loff_t isize; | |
58 | struct ext4_inode_info *ei1; | |
59 | struct ext4_inode_info *ei2; | |
60 | ||
61 | ei1 = EXT4_I(inode1); | |
62 | ei2 = EXT4_I(inode2); | |
63 | ||
64 | memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags)); | |
65 | memswap(&inode1->i_version, &inode2->i_version, | |
66 | sizeof(inode1->i_version)); | |
67 | memswap(&inode1->i_blocks, &inode2->i_blocks, | |
68 | sizeof(inode1->i_blocks)); | |
69 | memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes)); | |
70 | memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime)); | |
71 | memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime)); | |
72 | ||
73 | memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); | |
74 | memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags)); | |
75 | memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize)); | |
cde2d7a7 TT |
76 | ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); |
77 | ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); | |
393d1d1d DTB |
78 | |
79 | isize = i_size_read(inode1); | |
80 | i_size_write(inode1, i_size_read(inode2)); | |
81 | i_size_write(inode2, isize); | |
82 | } | |
83 | ||
84 | /** | |
85 | * Swap the information from the given @inode and the inode | |
86 | * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other | |
87 | * important fields of the inodes. | |
88 | * | |
89 | * @sb: the super block of the filesystem | |
90 | * @inode: the inode to swap with EXT4_BOOT_LOADER_INO | |
91 | * | |
92 | */ | |
93 | static long swap_inode_boot_loader(struct super_block *sb, | |
94 | struct inode *inode) | |
95 | { | |
96 | handle_t *handle; | |
97 | int err; | |
98 | struct inode *inode_bl; | |
393d1d1d | 99 | struct ext4_inode_info *ei_bl; |
d7092ae2 | 100 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
393d1d1d | 101 | |
d8558a29 TT |
102 | if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) |
103 | return -EINVAL; | |
393d1d1d | 104 | |
d8558a29 TT |
105 | if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) |
106 | return -EPERM; | |
393d1d1d | 107 | |
393d1d1d | 108 | inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); |
d8558a29 TT |
109 | if (IS_ERR(inode_bl)) |
110 | return PTR_ERR(inode_bl); | |
393d1d1d DTB |
111 | ei_bl = EXT4_I(inode_bl); |
112 | ||
113 | filemap_flush(inode->i_mapping); | |
114 | filemap_flush(inode_bl->i_mapping); | |
115 | ||
116 | /* Protect orig inodes against a truncate and make sure, | |
117 | * that only 1 swap_inode_boot_loader is running. */ | |
375e289e | 118 | lock_two_nondirectories(inode, inode_bl); |
393d1d1d DTB |
119 | |
120 | truncate_inode_pages(&inode->i_data, 0); | |
121 | truncate_inode_pages(&inode_bl->i_data, 0); | |
122 | ||
123 | /* Wait for all existing dio workers */ | |
124 | ext4_inode_block_unlocked_dio(inode); | |
125 | ext4_inode_block_unlocked_dio(inode_bl); | |
126 | inode_dio_wait(inode); | |
127 | inode_dio_wait(inode_bl); | |
128 | ||
129 | handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); | |
130 | if (IS_ERR(handle)) { | |
131 | err = -EINVAL; | |
30d29b11 | 132 | goto journal_err_out; |
393d1d1d DTB |
133 | } |
134 | ||
135 | /* Protect extent tree against block allocations via delalloc */ | |
136 | ext4_double_down_write_data_sem(inode, inode_bl); | |
137 | ||
138 | if (inode_bl->i_nlink == 0) { | |
139 | /* this inode has never been used as a BOOT_LOADER */ | |
140 | set_nlink(inode_bl, 1); | |
141 | i_uid_write(inode_bl, 0); | |
142 | i_gid_write(inode_bl, 0); | |
143 | inode_bl->i_flags = 0; | |
144 | ei_bl->i_flags = 0; | |
145 | inode_bl->i_version = 1; | |
146 | i_size_write(inode_bl, 0); | |
147 | inode_bl->i_mode = S_IFREG; | |
e2b911c5 | 148 | if (ext4_has_feature_extents(sb)) { |
393d1d1d DTB |
149 | ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); |
150 | ext4_ext_tree_init(handle, inode_bl); | |
151 | } else | |
152 | memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); | |
153 | } | |
154 | ||
155 | swap_inode_data(inode, inode_bl); | |
156 | ||
157 | inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode); | |
158 | ||
159 | spin_lock(&sbi->s_next_gen_lock); | |
160 | inode->i_generation = sbi->s_next_generation++; | |
161 | inode_bl->i_generation = sbi->s_next_generation++; | |
162 | spin_unlock(&sbi->s_next_gen_lock); | |
163 | ||
164 | ext4_discard_preallocations(inode); | |
165 | ||
166 | err = ext4_mark_inode_dirty(handle, inode); | |
167 | if (err < 0) { | |
168 | ext4_warning(inode->i_sb, | |
169 | "couldn't mark inode #%lu dirty (err %d)", | |
170 | inode->i_ino, err); | |
171 | /* Revert all changes: */ | |
172 | swap_inode_data(inode, inode_bl); | |
173 | } else { | |
174 | err = ext4_mark_inode_dirty(handle, inode_bl); | |
175 | if (err < 0) { | |
176 | ext4_warning(inode_bl->i_sb, | |
177 | "couldn't mark inode #%lu dirty (err %d)", | |
178 | inode_bl->i_ino, err); | |
179 | /* Revert all changes: */ | |
180 | swap_inode_data(inode, inode_bl); | |
181 | ext4_mark_inode_dirty(handle, inode); | |
182 | } | |
183 | } | |
393d1d1d | 184 | ext4_journal_stop(handle); |
393d1d1d DTB |
185 | ext4_double_up_write_data_sem(inode, inode_bl); |
186 | ||
30d29b11 | 187 | journal_err_out: |
393d1d1d DTB |
188 | ext4_inode_resume_unlocked_dio(inode); |
189 | ext4_inode_resume_unlocked_dio(inode_bl); | |
375e289e | 190 | unlock_two_nondirectories(inode, inode_bl); |
393d1d1d | 191 | iput(inode_bl); |
393d1d1d DTB |
192 | return err; |
193 | } | |
194 | ||
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 | } | |
204 | ||
5cdd7b2d | 205 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 206 | { |
496ad9aa | 207 | struct inode *inode = file_inode(filp); |
bab08ab9 | 208 | struct super_block *sb = inode->i_sb; |
617ba13b | 209 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 210 | unsigned int flags; |
ac27a0ec | 211 | |
af5bc92d | 212 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
213 | |
214 | switch (cmd) { | |
617ba13b | 215 | case EXT4_IOC_GETFLAGS: |
ff9ddf7e | 216 | ext4_get_inode_flags(ei); |
617ba13b | 217 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
ac27a0ec | 218 | return put_user(flags, (int __user *) arg); |
617ba13b | 219 | case EXT4_IOC_SETFLAGS: { |
ac27a0ec | 220 | handle_t *handle = NULL; |
4db46fc2 | 221 | int err, migrate = 0; |
617ba13b | 222 | struct ext4_iloc iloc; |
79906964 | 223 | unsigned int oldflags, mask, i; |
ac27a0ec DK |
224 | unsigned int jflag; |
225 | ||
2e149670 | 226 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
227 | return -EACCES; |
228 | ||
229 | if (get_user(flags, (int __user *) arg)) | |
230 | return -EFAULT; | |
231 | ||
a561be71 | 232 | err = mnt_want_write_file(filp); |
42a74f20 DH |
233 | if (err) |
234 | return err; | |
235 | ||
2dc6b0d4 | 236 | flags = ext4_mask_flags(inode->i_mode, flags); |
ac27a0ec | 237 | |
42a74f20 | 238 | err = -EPERM; |
ac27a0ec | 239 | mutex_lock(&inode->i_mutex); |
e47776a0 | 240 | /* Is it quota file? Do not allow user to mess with it */ |
42a74f20 DH |
241 | if (IS_NOQUOTA(inode)) |
242 | goto flags_out; | |
243 | ||
ac27a0ec DK |
244 | oldflags = ei->i_flags; |
245 | ||
246 | /* The JOURNAL_DATA flag is modifiable only by root */ | |
617ba13b | 247 | jflag = flags & EXT4_JOURNAL_DATA_FL; |
ac27a0ec DK |
248 | |
249 | /* | |
250 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
251 | * the relevant capability. | |
252 | * | |
253 | * This test looks nicer. Thanks to Pauline Middelink | |
254 | */ | |
617ba13b | 255 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { |
42a74f20 DH |
256 | if (!capable(CAP_LINUX_IMMUTABLE)) |
257 | goto flags_out; | |
ac27a0ec DK |
258 | } |
259 | ||
260 | /* | |
261 | * The JOURNAL_DATA flag can only be changed by | |
262 | * the relevant capability. | |
263 | */ | |
617ba13b | 264 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { |
42a74f20 DH |
265 | if (!capable(CAP_SYS_RESOURCE)) |
266 | goto flags_out; | |
ac27a0ec | 267 | } |
996bb9fd | 268 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) |
4db46fc2 | 269 | migrate = 1; |
ac27a0ec | 270 | |
c8d46e41 JZ |
271 | if (flags & EXT4_EOFBLOCKS_FL) { |
272 | /* we don't support adding EOFBLOCKS flag */ | |
273 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { | |
274 | err = -EOPNOTSUPP; | |
275 | goto flags_out; | |
276 | } | |
277 | } else if (oldflags & EXT4_EOFBLOCKS_FL) | |
278 | ext4_truncate(inode); | |
279 | ||
9924a92a | 280 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
ac27a0ec | 281 | if (IS_ERR(handle)) { |
42a74f20 DH |
282 | err = PTR_ERR(handle); |
283 | goto flags_out; | |
ac27a0ec DK |
284 | } |
285 | if (IS_SYNC(inode)) | |
0390131b | 286 | ext4_handle_sync(handle); |
617ba13b | 287 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec DK |
288 | if (err) |
289 | goto flags_err; | |
290 | ||
79906964 TT |
291 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { |
292 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
293 | continue; | |
294 | if (mask & flags) | |
295 | ext4_set_inode_flag(inode, i); | |
296 | else | |
297 | ext4_clear_inode_flag(inode, i); | |
298 | } | |
ac27a0ec | 299 | |
617ba13b | 300 | ext4_set_inode_flags(inode); |
ef7f3835 | 301 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 302 | |
617ba13b | 303 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 304 | flags_err: |
617ba13b | 305 | ext4_journal_stop(handle); |
42a74f20 DH |
306 | if (err) |
307 | goto flags_out; | |
ac27a0ec | 308 | |
617ba13b MC |
309 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) |
310 | err = ext4_change_inode_journal_flag(inode, jflag); | |
4db46fc2 AK |
311 | if (err) |
312 | goto flags_out; | |
996bb9fd TT |
313 | if (migrate) { |
314 | if (flags & EXT4_EXTENTS_FL) | |
315 | err = ext4_ext_migrate(inode); | |
316 | else | |
317 | err = ext4_ind_migrate(inode); | |
318 | } | |
319 | ||
42a74f20 | 320 | flags_out: |
ac27a0ec | 321 | mutex_unlock(&inode->i_mutex); |
2a79f17e | 322 | mnt_drop_write_file(filp); |
ac27a0ec DK |
323 | return err; |
324 | } | |
617ba13b MC |
325 | case EXT4_IOC_GETVERSION: |
326 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 327 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
328 | case EXT4_IOC_SETVERSION: |
329 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 330 | handle_t *handle; |
617ba13b | 331 | struct ext4_iloc iloc; |
ac27a0ec DK |
332 | __u32 generation; |
333 | int err; | |
334 | ||
2e149670 | 335 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 336 | return -EPERM; |
42a74f20 | 337 | |
9aa5d32b | 338 | if (ext4_has_metadata_csum(inode->i_sb)) { |
814525f4 DW |
339 | ext4_warning(sb, "Setting inode version is not " |
340 | "supported with metadata_csum enabled."); | |
341 | return -ENOTTY; | |
342 | } | |
343 | ||
a561be71 | 344 | err = mnt_want_write_file(filp); |
42a74f20 DH |
345 | if (err) |
346 | return err; | |
347 | if (get_user(generation, (int __user *) arg)) { | |
348 | err = -EFAULT; | |
349 | goto setversion_out; | |
350 | } | |
ac27a0ec | 351 | |
6c2155b9 | 352 | mutex_lock(&inode->i_mutex); |
9924a92a | 353 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
354 | if (IS_ERR(handle)) { |
355 | err = PTR_ERR(handle); | |
6c2155b9 | 356 | goto unlock_out; |
42a74f20 | 357 | } |
617ba13b | 358 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 359 | if (err == 0) { |
ef7f3835 | 360 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 361 | inode->i_generation = generation; |
617ba13b | 362 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 363 | } |
617ba13b | 364 | ext4_journal_stop(handle); |
6c2155b9 DH |
365 | |
366 | unlock_out: | |
367 | mutex_unlock(&inode->i_mutex); | |
42a74f20 | 368 | setversion_out: |
2a79f17e | 369 | mnt_drop_write_file(filp); |
ac27a0ec DK |
370 | return err; |
371 | } | |
617ba13b MC |
372 | case EXT4_IOC_GROUP_EXTEND: { |
373 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 374 | int err, err2=0; |
ac27a0ec | 375 | |
8f82f840 YY |
376 | err = ext4_resize_begin(sb); |
377 | if (err) | |
378 | return err; | |
ac27a0ec | 379 | |
014a1770 DH |
380 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
381 | err = -EFAULT; | |
382 | goto group_extend_out; | |
383 | } | |
ac27a0ec | 384 | |
e2b911c5 | 385 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
386 | ext4_msg(sb, KERN_ERR, |
387 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
388 | err = -EOPNOTSUPP; |
389 | goto group_extend_out; | |
bab08ab9 TT |
390 | } |
391 | ||
a561be71 | 392 | err = mnt_want_write_file(filp); |
42a74f20 | 393 | if (err) |
014a1770 | 394 | goto group_extend_out; |
42a74f20 | 395 | |
617ba13b | 396 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
397 | if (EXT4_SB(sb)->s_journal) { |
398 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
399 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
400 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
401 | } | |
7ffe1ea8 HK |
402 | if (err == 0) |
403 | err = err2; | |
2a79f17e | 404 | mnt_drop_write_file(filp); |
014a1770 | 405 | group_extend_out: |
8f82f840 | 406 | ext4_resize_end(sb); |
ac27a0ec DK |
407 | return err; |
408 | } | |
748de673 AF |
409 | |
410 | case EXT4_IOC_MOVE_EXT: { | |
411 | struct move_extent me; | |
2903ff01 AV |
412 | struct fd donor; |
413 | int err; | |
748de673 | 414 | |
4a58579b AF |
415 | if (!(filp->f_mode & FMODE_READ) || |
416 | !(filp->f_mode & FMODE_WRITE)) | |
417 | return -EBADF; | |
418 | ||
748de673 AF |
419 | if (copy_from_user(&me, |
420 | (struct move_extent __user *)arg, sizeof(me))) | |
421 | return -EFAULT; | |
4a58579b | 422 | me.moved_len = 0; |
748de673 | 423 | |
2903ff01 AV |
424 | donor = fdget(me.donor_fd); |
425 | if (!donor.file) | |
748de673 AF |
426 | return -EBADF; |
427 | ||
2903ff01 | 428 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
429 | err = -EBADF; |
430 | goto mext_out; | |
748de673 AF |
431 | } |
432 | ||
e2b911c5 | 433 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
434 | ext4_msg(sb, KERN_ERR, |
435 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
436 | err = -EOPNOTSUPP; |
437 | goto mext_out; | |
bab08ab9 TT |
438 | } |
439 | ||
a561be71 | 440 | err = mnt_want_write_file(filp); |
4a58579b AF |
441 | if (err) |
442 | goto mext_out; | |
443 | ||
2903ff01 | 444 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 445 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 446 | mnt_drop_write_file(filp); |
748de673 | 447 | |
60e6679e | 448 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 449 | &me, sizeof(me))) |
4a58579b AF |
450 | err = -EFAULT; |
451 | mext_out: | |
2903ff01 | 452 | fdput(donor); |
748de673 AF |
453 | return err; |
454 | } | |
455 | ||
617ba13b MC |
456 | case EXT4_IOC_GROUP_ADD: { |
457 | struct ext4_new_group_data input; | |
ac046f1d | 458 | int err, err2=0; |
ac27a0ec | 459 | |
8f82f840 YY |
460 | err = ext4_resize_begin(sb); |
461 | if (err) | |
462 | return err; | |
ac27a0ec | 463 | |
617ba13b | 464 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
014a1770 DH |
465 | sizeof(input))) { |
466 | err = -EFAULT; | |
467 | goto group_add_out; | |
468 | } | |
ac27a0ec | 469 | |
e2b911c5 | 470 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
471 | ext4_msg(sb, KERN_ERR, |
472 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
473 | err = -EOPNOTSUPP; |
474 | goto group_add_out; | |
bab08ab9 TT |
475 | } |
476 | ||
a561be71 | 477 | err = mnt_want_write_file(filp); |
42a74f20 | 478 | if (err) |
014a1770 | 479 | goto group_add_out; |
42a74f20 | 480 | |
617ba13b | 481 | err = ext4_group_add(sb, &input); |
ac046f1d PT |
482 | if (EXT4_SB(sb)->s_journal) { |
483 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
484 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
485 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
486 | } | |
7ffe1ea8 HK |
487 | if (err == 0) |
488 | err = err2; | |
2a79f17e | 489 | mnt_drop_write_file(filp); |
7f511862 TT |
490 | if (!err && ext4_has_group_desc_csum(sb) && |
491 | test_opt(sb, INIT_INODE_TABLE)) | |
492 | err = ext4_register_li_request(sb, input.group); | |
014a1770 | 493 | group_add_out: |
8f82f840 | 494 | ext4_resize_end(sb); |
ac27a0ec DK |
495 | return err; |
496 | } | |
497 | ||
c14c6fd5 | 498 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
499 | { |
500 | int err; | |
2e149670 | 501 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
502 | return -EACCES; |
503 | ||
a561be71 | 504 | err = mnt_want_write_file(filp); |
2a43a878 AK |
505 | if (err) |
506 | return err; | |
507 | /* | |
508 | * inode_mutex prevent write and truncate on the file. | |
509 | * Read still goes through. We take i_data_sem in | |
510 | * ext4_ext_swap_inode_data before we switch the | |
511 | * inode format to prevent read. | |
512 | */ | |
513 | mutex_lock(&(inode->i_mutex)); | |
514 | err = ext4_ext_migrate(inode); | |
515 | mutex_unlock(&(inode->i_mutex)); | |
2a79f17e | 516 | mnt_drop_write_file(filp); |
2a43a878 AK |
517 | return err; |
518 | } | |
c14c6fd5 | 519 | |
ccd2506b TT |
520 | case EXT4_IOC_ALLOC_DA_BLKS: |
521 | { | |
522 | int err; | |
2e149670 | 523 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
524 | return -EACCES; |
525 | ||
a561be71 | 526 | err = mnt_want_write_file(filp); |
ccd2506b TT |
527 | if (err) |
528 | return err; | |
529 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 530 | mnt_drop_write_file(filp); |
ccd2506b TT |
531 | return err; |
532 | } | |
533 | ||
393d1d1d | 534 | case EXT4_IOC_SWAP_BOOT: |
3e67cfad DM |
535 | { |
536 | int err; | |
393d1d1d DTB |
537 | if (!(filp->f_mode & FMODE_WRITE)) |
538 | return -EBADF; | |
3e67cfad DM |
539 | err = mnt_want_write_file(filp); |
540 | if (err) | |
541 | return err; | |
542 | err = swap_inode_boot_loader(sb, inode); | |
543 | mnt_drop_write_file(filp); | |
544 | return err; | |
545 | } | |
393d1d1d | 546 | |
19c5246d YY |
547 | case EXT4_IOC_RESIZE_FS: { |
548 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 549 | int err = 0, err2 = 0; |
7f511862 | 550 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d | 551 | |
e2b911c5 | 552 | if (ext4_has_feature_bigalloc(sb)) { |
19c5246d YY |
553 | ext4_msg(sb, KERN_ERR, |
554 | "Online resizing not (yet) supported with bigalloc"); | |
555 | return -EOPNOTSUPP; | |
556 | } | |
557 | ||
19c5246d YY |
558 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
559 | sizeof(__u64))) { | |
560 | return -EFAULT; | |
561 | } | |
562 | ||
19c5246d YY |
563 | err = ext4_resize_begin(sb); |
564 | if (err) | |
565 | return err; | |
566 | ||
8cae6f71 | 567 | err = mnt_want_write_file(filp); |
19c5246d YY |
568 | if (err) |
569 | goto resizefs_out; | |
570 | ||
571 | err = ext4_resize_fs(sb, n_blocks_count); | |
572 | if (EXT4_SB(sb)->s_journal) { | |
573 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
574 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
575 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
576 | } | |
577 | if (err == 0) | |
578 | err = err2; | |
8cae6f71 | 579 | mnt_drop_write_file(filp); |
7f511862 TT |
580 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
581 | ext4_has_group_desc_csum(sb) && | |
582 | test_opt(sb, INIT_INODE_TABLE)) | |
583 | err = ext4_register_li_request(sb, o_group); | |
584 | ||
19c5246d YY |
585 | resizefs_out: |
586 | ext4_resize_end(sb); | |
587 | return err; | |
588 | } | |
589 | ||
e681c047 LC |
590 | case FITRIM: |
591 | { | |
41431792 | 592 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
e681c047 LC |
593 | struct fstrim_range range; |
594 | int ret = 0; | |
595 | ||
596 | if (!capable(CAP_SYS_ADMIN)) | |
597 | return -EPERM; | |
598 | ||
41431792 LC |
599 | if (!blk_queue_discard(q)) |
600 | return -EOPNOTSUPP; | |
601 | ||
e6705f7c | 602 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
603 | sizeof(range))) |
604 | return -EFAULT; | |
605 | ||
5c2ed62f LC |
606 | range.minlen = max((unsigned int)range.minlen, |
607 | q->limits.discard_granularity); | |
e681c047 LC |
608 | ret = ext4_trim_fs(sb, &range); |
609 | if (ret < 0) | |
610 | return ret; | |
611 | ||
e6705f7c | 612 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
613 | sizeof(range))) |
614 | return -EFAULT; | |
615 | ||
616 | return 0; | |
617 | } | |
7869a4a6 TT |
618 | case EXT4_IOC_PRECACHE_EXTENTS: |
619 | return ext4_ext_precache(inode); | |
9bd8212f MH |
620 | case EXT4_IOC_SET_ENCRYPTION_POLICY: { |
621 | #ifdef CONFIG_EXT4_FS_ENCRYPTION | |
622 | struct ext4_encryption_policy policy; | |
623 | int err = 0; | |
624 | ||
625 | if (copy_from_user(&policy, | |
626 | (struct ext4_encryption_policy __user *)arg, | |
627 | sizeof(policy))) { | |
628 | err = -EFAULT; | |
629 | goto encryption_policy_out; | |
630 | } | |
e681c047 | 631 | |
9bd8212f MH |
632 | err = ext4_process_policy(&policy, inode); |
633 | encryption_policy_out: | |
634 | return err; | |
635 | #else | |
636 | return -EOPNOTSUPP; | |
637 | #endif | |
638 | } | |
639 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: { | |
640 | int err, err2; | |
641 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
642 | handle_t *handle; | |
643 | ||
644 | if (!ext4_sb_has_crypto(sb)) | |
645 | return -EOPNOTSUPP; | |
646 | if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { | |
647 | err = mnt_want_write_file(filp); | |
648 | if (err) | |
649 | return err; | |
650 | handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); | |
651 | if (IS_ERR(handle)) { | |
652 | err = PTR_ERR(handle); | |
653 | goto pwsalt_err_exit; | |
654 | } | |
655 | err = ext4_journal_get_write_access(handle, sbi->s_sbh); | |
656 | if (err) | |
657 | goto pwsalt_err_journal; | |
658 | generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); | |
659 | err = ext4_handle_dirty_metadata(handle, NULL, | |
660 | sbi->s_sbh); | |
661 | pwsalt_err_journal: | |
662 | err2 = ext4_journal_stop(handle); | |
663 | if (err2 && !err) | |
664 | err = err2; | |
665 | pwsalt_err_exit: | |
666 | mnt_drop_write_file(filp); | |
667 | if (err) | |
668 | return err; | |
669 | } | |
b4ab9e29 FF |
670 | if (copy_to_user((void __user *) arg, |
671 | sbi->s_es->s_encrypt_pw_salt, 16)) | |
9bd8212f MH |
672 | return -EFAULT; |
673 | return 0; | |
674 | } | |
675 | case EXT4_IOC_GET_ENCRYPTION_POLICY: { | |
676 | #ifdef CONFIG_EXT4_FS_ENCRYPTION | |
677 | struct ext4_encryption_policy policy; | |
678 | int err = 0; | |
679 | ||
680 | if (!ext4_encrypted_inode(inode)) | |
681 | return -ENOENT; | |
682 | err = ext4_get_policy(inode, &policy); | |
683 | if (err) | |
684 | return err; | |
b4ab9e29 | 685 | if (copy_to_user((void __user *)arg, &policy, sizeof(policy))) |
9bd8212f MH |
686 | return -EFAULT; |
687 | return 0; | |
688 | #else | |
689 | return -EOPNOTSUPP; | |
690 | #endif | |
691 | } | |
ac27a0ec DK |
692 | default: |
693 | return -ENOTTY; | |
694 | } | |
695 | } | |
696 | ||
697 | #ifdef CONFIG_COMPAT | |
617ba13b | 698 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 699 | { |
ac27a0ec DK |
700 | /* These are just misnamed, they actually get/put from/to user an int */ |
701 | switch (cmd) { | |
617ba13b MC |
702 | case EXT4_IOC32_GETFLAGS: |
703 | cmd = EXT4_IOC_GETFLAGS; | |
ac27a0ec | 704 | break; |
617ba13b MC |
705 | case EXT4_IOC32_SETFLAGS: |
706 | cmd = EXT4_IOC_SETFLAGS; | |
ac27a0ec | 707 | break; |
617ba13b MC |
708 | case EXT4_IOC32_GETVERSION: |
709 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 710 | break; |
617ba13b MC |
711 | case EXT4_IOC32_SETVERSION: |
712 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 713 | break; |
617ba13b MC |
714 | case EXT4_IOC32_GROUP_EXTEND: |
715 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 716 | break; |
617ba13b MC |
717 | case EXT4_IOC32_GETVERSION_OLD: |
718 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 719 | break; |
617ba13b MC |
720 | case EXT4_IOC32_SETVERSION_OLD: |
721 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 722 | break; |
617ba13b MC |
723 | case EXT4_IOC32_GETRSVSZ: |
724 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 725 | break; |
617ba13b MC |
726 | case EXT4_IOC32_SETRSVSZ: |
727 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 728 | break; |
4d92dc0f BH |
729 | case EXT4_IOC32_GROUP_ADD: { |
730 | struct compat_ext4_new_group_input __user *uinput; | |
731 | struct ext4_new_group_input input; | |
732 | mm_segment_t old_fs; | |
733 | int err; | |
734 | ||
735 | uinput = compat_ptr(arg); | |
736 | err = get_user(input.group, &uinput->group); | |
737 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
738 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
739 | err |= get_user(input.inode_table, &uinput->inode_table); | |
740 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
741 | err |= get_user(input.reserved_blocks, | |
742 | &uinput->reserved_blocks); | |
743 | if (err) | |
744 | return -EFAULT; | |
745 | old_fs = get_fs(); | |
746 | set_fs(KERNEL_DS); | |
747 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, | |
748 | (unsigned long) &input); | |
749 | set_fs(old_fs); | |
750 | return err; | |
751 | } | |
b684b2ee | 752 | case EXT4_IOC_MOVE_EXT: |
19c5246d | 753 | case EXT4_IOC_RESIZE_FS: |
7869a4a6 | 754 | case EXT4_IOC_PRECACHE_EXTENTS: |
9bd8212f MH |
755 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
756 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: | |
757 | case EXT4_IOC_GET_ENCRYPTION_POLICY: | |
b684b2ee | 758 | break; |
ac27a0ec DK |
759 | default: |
760 | return -ENOIOCTLCMD; | |
761 | } | |
5cdd7b2d | 762 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
763 | } |
764 | #endif |