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; | |
148 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, | |
149 | EXT4_FEATURE_INCOMPAT_EXTENTS)) { | |
150 | ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); | |
151 | ext4_ext_tree_init(handle, inode_bl); | |
152 | } else | |
153 | memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); | |
154 | } | |
155 | ||
156 | swap_inode_data(inode, inode_bl); | |
157 | ||
158 | inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode); | |
159 | ||
160 | spin_lock(&sbi->s_next_gen_lock); | |
161 | inode->i_generation = sbi->s_next_generation++; | |
162 | inode_bl->i_generation = sbi->s_next_generation++; | |
163 | spin_unlock(&sbi->s_next_gen_lock); | |
164 | ||
165 | ext4_discard_preallocations(inode); | |
166 | ||
167 | err = ext4_mark_inode_dirty(handle, inode); | |
168 | if (err < 0) { | |
169 | ext4_warning(inode->i_sb, | |
170 | "couldn't mark inode #%lu dirty (err %d)", | |
171 | inode->i_ino, err); | |
172 | /* Revert all changes: */ | |
173 | swap_inode_data(inode, inode_bl); | |
174 | } else { | |
175 | err = ext4_mark_inode_dirty(handle, inode_bl); | |
176 | if (err < 0) { | |
177 | ext4_warning(inode_bl->i_sb, | |
178 | "couldn't mark inode #%lu dirty (err %d)", | |
179 | inode_bl->i_ino, err); | |
180 | /* Revert all changes: */ | |
181 | swap_inode_data(inode, inode_bl); | |
182 | ext4_mark_inode_dirty(handle, inode); | |
183 | } | |
184 | } | |
393d1d1d | 185 | ext4_journal_stop(handle); |
393d1d1d DTB |
186 | ext4_double_up_write_data_sem(inode, inode_bl); |
187 | ||
30d29b11 | 188 | journal_err_out: |
393d1d1d DTB |
189 | ext4_inode_resume_unlocked_dio(inode); |
190 | ext4_inode_resume_unlocked_dio(inode_bl); | |
375e289e | 191 | unlock_two_nondirectories(inode, inode_bl); |
393d1d1d | 192 | iput(inode_bl); |
393d1d1d DTB |
193 | return err; |
194 | } | |
195 | ||
9bd8212f MH |
196 | static int uuid_is_zero(__u8 u[16]) |
197 | { | |
198 | int i; | |
199 | ||
200 | for (i = 0; i < 16; i++) | |
201 | if (u[i]) | |
202 | return 0; | |
203 | return 1; | |
204 | } | |
205 | ||
5cdd7b2d | 206 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 207 | { |
496ad9aa | 208 | struct inode *inode = file_inode(filp); |
bab08ab9 | 209 | struct super_block *sb = inode->i_sb; |
617ba13b | 210 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 211 | unsigned int flags; |
ac27a0ec | 212 | |
af5bc92d | 213 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
214 | |
215 | switch (cmd) { | |
617ba13b | 216 | case EXT4_IOC_GETFLAGS: |
ff9ddf7e | 217 | ext4_get_inode_flags(ei); |
617ba13b | 218 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
ac27a0ec | 219 | return put_user(flags, (int __user *) arg); |
617ba13b | 220 | case EXT4_IOC_SETFLAGS: { |
ac27a0ec | 221 | handle_t *handle = NULL; |
4db46fc2 | 222 | int err, migrate = 0; |
617ba13b | 223 | struct ext4_iloc iloc; |
79906964 | 224 | unsigned int oldflags, mask, i; |
ac27a0ec DK |
225 | unsigned int jflag; |
226 | ||
2e149670 | 227 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
228 | return -EACCES; |
229 | ||
230 | if (get_user(flags, (int __user *) arg)) | |
231 | return -EFAULT; | |
232 | ||
a561be71 | 233 | err = mnt_want_write_file(filp); |
42a74f20 DH |
234 | if (err) |
235 | return err; | |
236 | ||
2dc6b0d4 | 237 | flags = ext4_mask_flags(inode->i_mode, flags); |
ac27a0ec | 238 | |
42a74f20 | 239 | err = -EPERM; |
ac27a0ec | 240 | mutex_lock(&inode->i_mutex); |
e47776a0 | 241 | /* Is it quota file? Do not allow user to mess with it */ |
42a74f20 DH |
242 | if (IS_NOQUOTA(inode)) |
243 | goto flags_out; | |
244 | ||
ac27a0ec DK |
245 | oldflags = ei->i_flags; |
246 | ||
247 | /* The JOURNAL_DATA flag is modifiable only by root */ | |
617ba13b | 248 | jflag = flags & EXT4_JOURNAL_DATA_FL; |
ac27a0ec DK |
249 | |
250 | /* | |
251 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
252 | * the relevant capability. | |
253 | * | |
254 | * This test looks nicer. Thanks to Pauline Middelink | |
255 | */ | |
617ba13b | 256 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { |
42a74f20 DH |
257 | if (!capable(CAP_LINUX_IMMUTABLE)) |
258 | goto flags_out; | |
ac27a0ec DK |
259 | } |
260 | ||
261 | /* | |
262 | * The JOURNAL_DATA flag can only be changed by | |
263 | * the relevant capability. | |
264 | */ | |
617ba13b | 265 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { |
42a74f20 DH |
266 | if (!capable(CAP_SYS_RESOURCE)) |
267 | goto flags_out; | |
ac27a0ec | 268 | } |
996bb9fd | 269 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) |
4db46fc2 | 270 | migrate = 1; |
ac27a0ec | 271 | |
c8d46e41 JZ |
272 | if (flags & EXT4_EOFBLOCKS_FL) { |
273 | /* we don't support adding EOFBLOCKS flag */ | |
274 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { | |
275 | err = -EOPNOTSUPP; | |
276 | goto flags_out; | |
277 | } | |
278 | } else if (oldflags & EXT4_EOFBLOCKS_FL) | |
279 | ext4_truncate(inode); | |
280 | ||
9924a92a | 281 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
ac27a0ec | 282 | if (IS_ERR(handle)) { |
42a74f20 DH |
283 | err = PTR_ERR(handle); |
284 | goto flags_out; | |
ac27a0ec DK |
285 | } |
286 | if (IS_SYNC(inode)) | |
0390131b | 287 | ext4_handle_sync(handle); |
617ba13b | 288 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec DK |
289 | if (err) |
290 | goto flags_err; | |
291 | ||
79906964 TT |
292 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { |
293 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
294 | continue; | |
295 | if (mask & flags) | |
296 | ext4_set_inode_flag(inode, i); | |
297 | else | |
298 | ext4_clear_inode_flag(inode, i); | |
299 | } | |
ac27a0ec | 300 | |
617ba13b | 301 | ext4_set_inode_flags(inode); |
ef7f3835 | 302 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 303 | |
617ba13b | 304 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 305 | flags_err: |
617ba13b | 306 | ext4_journal_stop(handle); |
42a74f20 DH |
307 | if (err) |
308 | goto flags_out; | |
ac27a0ec | 309 | |
617ba13b MC |
310 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) |
311 | err = ext4_change_inode_journal_flag(inode, jflag); | |
4db46fc2 AK |
312 | if (err) |
313 | goto flags_out; | |
996bb9fd TT |
314 | if (migrate) { |
315 | if (flags & EXT4_EXTENTS_FL) | |
316 | err = ext4_ext_migrate(inode); | |
317 | else | |
318 | err = ext4_ind_migrate(inode); | |
319 | } | |
320 | ||
42a74f20 | 321 | flags_out: |
ac27a0ec | 322 | mutex_unlock(&inode->i_mutex); |
2a79f17e | 323 | mnt_drop_write_file(filp); |
ac27a0ec DK |
324 | return err; |
325 | } | |
617ba13b MC |
326 | case EXT4_IOC_GETVERSION: |
327 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 328 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
329 | case EXT4_IOC_SETVERSION: |
330 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 331 | handle_t *handle; |
617ba13b | 332 | struct ext4_iloc iloc; |
ac27a0ec DK |
333 | __u32 generation; |
334 | int err; | |
335 | ||
2e149670 | 336 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 337 | return -EPERM; |
42a74f20 | 338 | |
9aa5d32b | 339 | if (ext4_has_metadata_csum(inode->i_sb)) { |
814525f4 DW |
340 | ext4_warning(sb, "Setting inode version is not " |
341 | "supported with metadata_csum enabled."); | |
342 | return -ENOTTY; | |
343 | } | |
344 | ||
a561be71 | 345 | err = mnt_want_write_file(filp); |
42a74f20 DH |
346 | if (err) |
347 | return err; | |
348 | if (get_user(generation, (int __user *) arg)) { | |
349 | err = -EFAULT; | |
350 | goto setversion_out; | |
351 | } | |
ac27a0ec | 352 | |
6c2155b9 | 353 | mutex_lock(&inode->i_mutex); |
9924a92a | 354 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
355 | if (IS_ERR(handle)) { |
356 | err = PTR_ERR(handle); | |
6c2155b9 | 357 | goto unlock_out; |
42a74f20 | 358 | } |
617ba13b | 359 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 360 | if (err == 0) { |
ef7f3835 | 361 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 362 | inode->i_generation = generation; |
617ba13b | 363 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 364 | } |
617ba13b | 365 | ext4_journal_stop(handle); |
6c2155b9 DH |
366 | |
367 | unlock_out: | |
368 | mutex_unlock(&inode->i_mutex); | |
42a74f20 | 369 | setversion_out: |
2a79f17e | 370 | mnt_drop_write_file(filp); |
ac27a0ec DK |
371 | return err; |
372 | } | |
617ba13b MC |
373 | case EXT4_IOC_GROUP_EXTEND: { |
374 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 375 | int err, err2=0; |
ac27a0ec | 376 | |
8f82f840 YY |
377 | err = ext4_resize_begin(sb); |
378 | if (err) | |
379 | return err; | |
ac27a0ec | 380 | |
014a1770 DH |
381 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
382 | err = -EFAULT; | |
383 | goto group_extend_out; | |
384 | } | |
ac27a0ec | 385 | |
bab08ab9 TT |
386 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
387 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
388 | ext4_msg(sb, KERN_ERR, | |
389 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
390 | err = -EOPNOTSUPP; |
391 | goto group_extend_out; | |
bab08ab9 TT |
392 | } |
393 | ||
a561be71 | 394 | err = mnt_want_write_file(filp); |
42a74f20 | 395 | if (err) |
014a1770 | 396 | goto group_extend_out; |
42a74f20 | 397 | |
617ba13b | 398 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
399 | if (EXT4_SB(sb)->s_journal) { |
400 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
401 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
402 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
403 | } | |
7ffe1ea8 HK |
404 | if (err == 0) |
405 | err = err2; | |
2a79f17e | 406 | mnt_drop_write_file(filp); |
014a1770 | 407 | group_extend_out: |
8f82f840 | 408 | ext4_resize_end(sb); |
ac27a0ec DK |
409 | return err; |
410 | } | |
748de673 AF |
411 | |
412 | case EXT4_IOC_MOVE_EXT: { | |
413 | struct move_extent me; | |
2903ff01 AV |
414 | struct fd donor; |
415 | int err; | |
748de673 | 416 | |
4a58579b AF |
417 | if (!(filp->f_mode & FMODE_READ) || |
418 | !(filp->f_mode & FMODE_WRITE)) | |
419 | return -EBADF; | |
420 | ||
748de673 AF |
421 | if (copy_from_user(&me, |
422 | (struct move_extent __user *)arg, sizeof(me))) | |
423 | return -EFAULT; | |
4a58579b | 424 | me.moved_len = 0; |
748de673 | 425 | |
2903ff01 AV |
426 | donor = fdget(me.donor_fd); |
427 | if (!donor.file) | |
748de673 AF |
428 | return -EBADF; |
429 | ||
2903ff01 | 430 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
431 | err = -EBADF; |
432 | goto mext_out; | |
748de673 AF |
433 | } |
434 | ||
bab08ab9 TT |
435 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
436 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
437 | ext4_msg(sb, KERN_ERR, | |
438 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
439 | err = -EOPNOTSUPP; |
440 | goto mext_out; | |
bab08ab9 TT |
441 | } |
442 | ||
a561be71 | 443 | err = mnt_want_write_file(filp); |
4a58579b AF |
444 | if (err) |
445 | goto mext_out; | |
446 | ||
2903ff01 | 447 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 448 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 449 | mnt_drop_write_file(filp); |
748de673 | 450 | |
60e6679e | 451 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 452 | &me, sizeof(me))) |
4a58579b AF |
453 | err = -EFAULT; |
454 | mext_out: | |
2903ff01 | 455 | fdput(donor); |
748de673 AF |
456 | return err; |
457 | } | |
458 | ||
617ba13b MC |
459 | case EXT4_IOC_GROUP_ADD: { |
460 | struct ext4_new_group_data input; | |
ac046f1d | 461 | int err, err2=0; |
ac27a0ec | 462 | |
8f82f840 YY |
463 | err = ext4_resize_begin(sb); |
464 | if (err) | |
465 | return err; | |
ac27a0ec | 466 | |
617ba13b | 467 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
014a1770 DH |
468 | sizeof(input))) { |
469 | err = -EFAULT; | |
470 | goto group_add_out; | |
471 | } | |
ac27a0ec | 472 | |
bab08ab9 TT |
473 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
474 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
475 | ext4_msg(sb, KERN_ERR, | |
476 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
477 | err = -EOPNOTSUPP; |
478 | goto group_add_out; | |
bab08ab9 TT |
479 | } |
480 | ||
a561be71 | 481 | err = mnt_want_write_file(filp); |
42a74f20 | 482 | if (err) |
014a1770 | 483 | goto group_add_out; |
42a74f20 | 484 | |
617ba13b | 485 | err = ext4_group_add(sb, &input); |
ac046f1d PT |
486 | if (EXT4_SB(sb)->s_journal) { |
487 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
488 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
489 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
490 | } | |
7ffe1ea8 HK |
491 | if (err == 0) |
492 | err = err2; | |
2a79f17e | 493 | mnt_drop_write_file(filp); |
7f511862 TT |
494 | if (!err && ext4_has_group_desc_csum(sb) && |
495 | test_opt(sb, INIT_INODE_TABLE)) | |
496 | err = ext4_register_li_request(sb, input.group); | |
014a1770 | 497 | group_add_out: |
8f82f840 | 498 | ext4_resize_end(sb); |
ac27a0ec DK |
499 | return err; |
500 | } | |
501 | ||
c14c6fd5 | 502 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
503 | { |
504 | int err; | |
2e149670 | 505 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
506 | return -EACCES; |
507 | ||
a561be71 | 508 | err = mnt_want_write_file(filp); |
2a43a878 AK |
509 | if (err) |
510 | return err; | |
511 | /* | |
512 | * inode_mutex prevent write and truncate on the file. | |
513 | * Read still goes through. We take i_data_sem in | |
514 | * ext4_ext_swap_inode_data before we switch the | |
515 | * inode format to prevent read. | |
516 | */ | |
517 | mutex_lock(&(inode->i_mutex)); | |
518 | err = ext4_ext_migrate(inode); | |
519 | mutex_unlock(&(inode->i_mutex)); | |
2a79f17e | 520 | mnt_drop_write_file(filp); |
2a43a878 AK |
521 | return err; |
522 | } | |
c14c6fd5 | 523 | |
ccd2506b TT |
524 | case EXT4_IOC_ALLOC_DA_BLKS: |
525 | { | |
526 | int err; | |
2e149670 | 527 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
528 | return -EACCES; |
529 | ||
a561be71 | 530 | err = mnt_want_write_file(filp); |
ccd2506b TT |
531 | if (err) |
532 | return err; | |
533 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 534 | mnt_drop_write_file(filp); |
ccd2506b TT |
535 | return err; |
536 | } | |
537 | ||
393d1d1d | 538 | case EXT4_IOC_SWAP_BOOT: |
3e67cfad DM |
539 | { |
540 | int err; | |
393d1d1d DTB |
541 | if (!(filp->f_mode & FMODE_WRITE)) |
542 | return -EBADF; | |
3e67cfad DM |
543 | err = mnt_want_write_file(filp); |
544 | if (err) | |
545 | return err; | |
546 | err = swap_inode_boot_loader(sb, inode); | |
547 | mnt_drop_write_file(filp); | |
548 | return err; | |
549 | } | |
393d1d1d | 550 | |
19c5246d YY |
551 | case EXT4_IOC_RESIZE_FS: { |
552 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 553 | int err = 0, err2 = 0; |
7f511862 | 554 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d YY |
555 | |
556 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
557 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
558 | ext4_msg(sb, KERN_ERR, | |
559 | "Online resizing not (yet) supported with bigalloc"); | |
560 | return -EOPNOTSUPP; | |
561 | } | |
562 | ||
19c5246d YY |
563 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
564 | sizeof(__u64))) { | |
565 | return -EFAULT; | |
566 | } | |
567 | ||
19c5246d YY |
568 | err = ext4_resize_begin(sb); |
569 | if (err) | |
570 | return err; | |
571 | ||
8cae6f71 | 572 | err = mnt_want_write_file(filp); |
19c5246d YY |
573 | if (err) |
574 | goto resizefs_out; | |
575 | ||
576 | err = ext4_resize_fs(sb, n_blocks_count); | |
577 | if (EXT4_SB(sb)->s_journal) { | |
578 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
579 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
580 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
581 | } | |
582 | if (err == 0) | |
583 | err = err2; | |
8cae6f71 | 584 | mnt_drop_write_file(filp); |
7f511862 TT |
585 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
586 | ext4_has_group_desc_csum(sb) && | |
587 | test_opt(sb, INIT_INODE_TABLE)) | |
588 | err = ext4_register_li_request(sb, o_group); | |
589 | ||
19c5246d YY |
590 | resizefs_out: |
591 | ext4_resize_end(sb); | |
592 | return err; | |
593 | } | |
594 | ||
e681c047 LC |
595 | case FITRIM: |
596 | { | |
41431792 | 597 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
e681c047 LC |
598 | struct fstrim_range range; |
599 | int ret = 0; | |
600 | ||
601 | if (!capable(CAP_SYS_ADMIN)) | |
602 | return -EPERM; | |
603 | ||
41431792 LC |
604 | if (!blk_queue_discard(q)) |
605 | return -EOPNOTSUPP; | |
606 | ||
e6705f7c | 607 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
608 | sizeof(range))) |
609 | return -EFAULT; | |
610 | ||
5c2ed62f LC |
611 | range.minlen = max((unsigned int)range.minlen, |
612 | q->limits.discard_granularity); | |
e681c047 LC |
613 | ret = ext4_trim_fs(sb, &range); |
614 | if (ret < 0) | |
615 | return ret; | |
616 | ||
e6705f7c | 617 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
618 | sizeof(range))) |
619 | return -EFAULT; | |
620 | ||
621 | return 0; | |
622 | } | |
7869a4a6 TT |
623 | case EXT4_IOC_PRECACHE_EXTENTS: |
624 | return ext4_ext_precache(inode); | |
9bd8212f MH |
625 | case EXT4_IOC_SET_ENCRYPTION_POLICY: { |
626 | #ifdef CONFIG_EXT4_FS_ENCRYPTION | |
627 | struct ext4_encryption_policy policy; | |
628 | int err = 0; | |
629 | ||
630 | if (copy_from_user(&policy, | |
631 | (struct ext4_encryption_policy __user *)arg, | |
632 | sizeof(policy))) { | |
633 | err = -EFAULT; | |
634 | goto encryption_policy_out; | |
635 | } | |
e681c047 | 636 | |
9bd8212f MH |
637 | err = ext4_process_policy(&policy, inode); |
638 | encryption_policy_out: | |
639 | return err; | |
640 | #else | |
641 | return -EOPNOTSUPP; | |
642 | #endif | |
643 | } | |
644 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: { | |
645 | int err, err2; | |
646 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
647 | handle_t *handle; | |
648 | ||
649 | if (!ext4_sb_has_crypto(sb)) | |
650 | return -EOPNOTSUPP; | |
651 | if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { | |
652 | err = mnt_want_write_file(filp); | |
653 | if (err) | |
654 | return err; | |
655 | handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); | |
656 | if (IS_ERR(handle)) { | |
657 | err = PTR_ERR(handle); | |
658 | goto pwsalt_err_exit; | |
659 | } | |
660 | err = ext4_journal_get_write_access(handle, sbi->s_sbh); | |
661 | if (err) | |
662 | goto pwsalt_err_journal; | |
663 | generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); | |
664 | err = ext4_handle_dirty_metadata(handle, NULL, | |
665 | sbi->s_sbh); | |
666 | pwsalt_err_journal: | |
667 | err2 = ext4_journal_stop(handle); | |
668 | if (err2 && !err) | |
669 | err = err2; | |
670 | pwsalt_err_exit: | |
671 | mnt_drop_write_file(filp); | |
672 | if (err) | |
673 | return err; | |
674 | } | |
b4ab9e29 FF |
675 | if (copy_to_user((void __user *) arg, |
676 | sbi->s_es->s_encrypt_pw_salt, 16)) | |
9bd8212f MH |
677 | return -EFAULT; |
678 | return 0; | |
679 | } | |
680 | case EXT4_IOC_GET_ENCRYPTION_POLICY: { | |
681 | #ifdef CONFIG_EXT4_FS_ENCRYPTION | |
682 | struct ext4_encryption_policy policy; | |
683 | int err = 0; | |
684 | ||
685 | if (!ext4_encrypted_inode(inode)) | |
686 | return -ENOENT; | |
687 | err = ext4_get_policy(inode, &policy); | |
688 | if (err) | |
689 | return err; | |
b4ab9e29 | 690 | if (copy_to_user((void __user *)arg, &policy, sizeof(policy))) |
9bd8212f MH |
691 | return -EFAULT; |
692 | return 0; | |
693 | #else | |
694 | return -EOPNOTSUPP; | |
695 | #endif | |
696 | } | |
ac27a0ec DK |
697 | default: |
698 | return -ENOTTY; | |
699 | } | |
700 | } | |
701 | ||
702 | #ifdef CONFIG_COMPAT | |
617ba13b | 703 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 704 | { |
ac27a0ec DK |
705 | /* These are just misnamed, they actually get/put from/to user an int */ |
706 | switch (cmd) { | |
617ba13b MC |
707 | case EXT4_IOC32_GETFLAGS: |
708 | cmd = EXT4_IOC_GETFLAGS; | |
ac27a0ec | 709 | break; |
617ba13b MC |
710 | case EXT4_IOC32_SETFLAGS: |
711 | cmd = EXT4_IOC_SETFLAGS; | |
ac27a0ec | 712 | break; |
617ba13b MC |
713 | case EXT4_IOC32_GETVERSION: |
714 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 715 | break; |
617ba13b MC |
716 | case EXT4_IOC32_SETVERSION: |
717 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 718 | break; |
617ba13b MC |
719 | case EXT4_IOC32_GROUP_EXTEND: |
720 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 721 | break; |
617ba13b MC |
722 | case EXT4_IOC32_GETVERSION_OLD: |
723 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 724 | break; |
617ba13b MC |
725 | case EXT4_IOC32_SETVERSION_OLD: |
726 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 727 | break; |
617ba13b MC |
728 | case EXT4_IOC32_GETRSVSZ: |
729 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 730 | break; |
617ba13b MC |
731 | case EXT4_IOC32_SETRSVSZ: |
732 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 733 | break; |
4d92dc0f BH |
734 | case EXT4_IOC32_GROUP_ADD: { |
735 | struct compat_ext4_new_group_input __user *uinput; | |
736 | struct ext4_new_group_input input; | |
737 | mm_segment_t old_fs; | |
738 | int err; | |
739 | ||
740 | uinput = compat_ptr(arg); | |
741 | err = get_user(input.group, &uinput->group); | |
742 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
743 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
744 | err |= get_user(input.inode_table, &uinput->inode_table); | |
745 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
746 | err |= get_user(input.reserved_blocks, | |
747 | &uinput->reserved_blocks); | |
748 | if (err) | |
749 | return -EFAULT; | |
750 | old_fs = get_fs(); | |
751 | set_fs(KERNEL_DS); | |
752 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, | |
753 | (unsigned long) &input); | |
754 | set_fs(old_fs); | |
755 | return err; | |
756 | } | |
b684b2ee | 757 | case EXT4_IOC_MOVE_EXT: |
19c5246d | 758 | case EXT4_IOC_RESIZE_FS: |
7869a4a6 | 759 | case EXT4_IOC_PRECACHE_EXTENTS: |
9bd8212f MH |
760 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
761 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: | |
762 | case EXT4_IOC_GET_ENCRYPTION_POLICY: | |
b684b2ee | 763 | break; |
ac27a0ec DK |
764 | default: |
765 | return -ENOIOCTLCMD; | |
766 | } | |
5cdd7b2d | 767 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
768 | } |
769 | #endif |