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> | |
dab291af | 11 | #include <linux/jbd2.h> |
ac27a0ec | 12 | #include <linux/capability.h> |
ac27a0ec DK |
13 | #include <linux/time.h> |
14 | #include <linux/compat.h> | |
42a74f20 | 15 | #include <linux/mount.h> |
748de673 | 16 | #include <linux/file.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; | |
34 | unsigned char tmp; | |
35 | ||
36 | ap = (unsigned char *)a; | |
37 | bp = (unsigned char *)b; | |
38 | while (len-- > 0) { | |
39 | tmp = *ap; | |
40 | *ap = *bp; | |
41 | *bp = tmp; | |
42 | ap++; | |
43 | bp++; | |
44 | } | |
45 | } | |
46 | ||
47 | /** | |
48 | * Swap i_data and associated attributes between @inode1 and @inode2. | |
49 | * This function is used for the primary swap between inode1 and inode2 | |
50 | * and also to revert this primary swap in case of errors. | |
51 | * | |
52 | * Therefore you have to make sure, that calling this method twice | |
53 | * will revert all changes. | |
54 | * | |
55 | * @inode1: pointer to first inode | |
56 | * @inode2: pointer to second inode | |
57 | */ | |
58 | static void swap_inode_data(struct inode *inode1, struct inode *inode2) | |
59 | { | |
60 | loff_t isize; | |
61 | struct ext4_inode_info *ei1; | |
62 | struct ext4_inode_info *ei2; | |
63 | ||
64 | ei1 = EXT4_I(inode1); | |
65 | ei2 = EXT4_I(inode2); | |
66 | ||
67 | memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags)); | |
68 | memswap(&inode1->i_version, &inode2->i_version, | |
69 | sizeof(inode1->i_version)); | |
70 | memswap(&inode1->i_blocks, &inode2->i_blocks, | |
71 | sizeof(inode1->i_blocks)); | |
72 | memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes)); | |
73 | memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime)); | |
74 | memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime)); | |
75 | ||
76 | memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); | |
77 | memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags)); | |
78 | memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize)); | |
cde2d7a7 TT |
79 | ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); |
80 | ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); | |
81 | ext4_es_lru_del(inode1); | |
82 | ext4_es_lru_del(inode2); | |
393d1d1d DTB |
83 | |
84 | isize = i_size_read(inode1); | |
85 | i_size_write(inode1, i_size_read(inode2)); | |
86 | i_size_write(inode2, isize); | |
87 | } | |
88 | ||
89 | /** | |
90 | * Swap the information from the given @inode and the inode | |
91 | * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other | |
92 | * important fields of the inodes. | |
93 | * | |
94 | * @sb: the super block of the filesystem | |
95 | * @inode: the inode to swap with EXT4_BOOT_LOADER_INO | |
96 | * | |
97 | */ | |
98 | static long swap_inode_boot_loader(struct super_block *sb, | |
99 | struct inode *inode) | |
100 | { | |
101 | handle_t *handle; | |
102 | int err; | |
103 | struct inode *inode_bl; | |
393d1d1d | 104 | struct ext4_inode_info *ei_bl; |
d7092ae2 | 105 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
393d1d1d DTB |
106 | |
107 | if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) { | |
108 | err = -EINVAL; | |
109 | goto swap_boot_out; | |
110 | } | |
111 | ||
112 | if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) { | |
113 | err = -EPERM; | |
114 | goto swap_boot_out; | |
115 | } | |
116 | ||
393d1d1d DTB |
117 | inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); |
118 | if (IS_ERR(inode_bl)) { | |
119 | err = PTR_ERR(inode_bl); | |
120 | goto swap_boot_out; | |
121 | } | |
122 | ei_bl = EXT4_I(inode_bl); | |
123 | ||
124 | filemap_flush(inode->i_mapping); | |
125 | filemap_flush(inode_bl->i_mapping); | |
126 | ||
127 | /* Protect orig inodes against a truncate and make sure, | |
128 | * that only 1 swap_inode_boot_loader is running. */ | |
375e289e | 129 | lock_two_nondirectories(inode, inode_bl); |
393d1d1d DTB |
130 | |
131 | truncate_inode_pages(&inode->i_data, 0); | |
132 | truncate_inode_pages(&inode_bl->i_data, 0); | |
133 | ||
134 | /* Wait for all existing dio workers */ | |
135 | ext4_inode_block_unlocked_dio(inode); | |
136 | ext4_inode_block_unlocked_dio(inode_bl); | |
137 | inode_dio_wait(inode); | |
138 | inode_dio_wait(inode_bl); | |
139 | ||
140 | handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); | |
141 | if (IS_ERR(handle)) { | |
142 | err = -EINVAL; | |
143 | goto swap_boot_out; | |
144 | } | |
145 | ||
146 | /* Protect extent tree against block allocations via delalloc */ | |
147 | ext4_double_down_write_data_sem(inode, inode_bl); | |
148 | ||
149 | if (inode_bl->i_nlink == 0) { | |
150 | /* this inode has never been used as a BOOT_LOADER */ | |
151 | set_nlink(inode_bl, 1); | |
152 | i_uid_write(inode_bl, 0); | |
153 | i_gid_write(inode_bl, 0); | |
154 | inode_bl->i_flags = 0; | |
155 | ei_bl->i_flags = 0; | |
156 | inode_bl->i_version = 1; | |
157 | i_size_write(inode_bl, 0); | |
158 | inode_bl->i_mode = S_IFREG; | |
159 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, | |
160 | EXT4_FEATURE_INCOMPAT_EXTENTS)) { | |
161 | ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); | |
162 | ext4_ext_tree_init(handle, inode_bl); | |
163 | } else | |
164 | memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); | |
165 | } | |
166 | ||
167 | swap_inode_data(inode, inode_bl); | |
168 | ||
169 | inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode); | |
170 | ||
171 | spin_lock(&sbi->s_next_gen_lock); | |
172 | inode->i_generation = sbi->s_next_generation++; | |
173 | inode_bl->i_generation = sbi->s_next_generation++; | |
174 | spin_unlock(&sbi->s_next_gen_lock); | |
175 | ||
176 | ext4_discard_preallocations(inode); | |
177 | ||
178 | err = ext4_mark_inode_dirty(handle, inode); | |
179 | if (err < 0) { | |
180 | ext4_warning(inode->i_sb, | |
181 | "couldn't mark inode #%lu dirty (err %d)", | |
182 | inode->i_ino, err); | |
183 | /* Revert all changes: */ | |
184 | swap_inode_data(inode, inode_bl); | |
185 | } else { | |
186 | err = ext4_mark_inode_dirty(handle, inode_bl); | |
187 | if (err < 0) { | |
188 | ext4_warning(inode_bl->i_sb, | |
189 | "couldn't mark inode #%lu dirty (err %d)", | |
190 | inode_bl->i_ino, err); | |
191 | /* Revert all changes: */ | |
192 | swap_inode_data(inode, inode_bl); | |
193 | ext4_mark_inode_dirty(handle, inode); | |
194 | } | |
195 | } | |
196 | ||
197 | ext4_journal_stop(handle); | |
198 | ||
199 | ext4_double_up_write_data_sem(inode, inode_bl); | |
200 | ||
201 | ext4_inode_resume_unlocked_dio(inode); | |
202 | ext4_inode_resume_unlocked_dio(inode_bl); | |
203 | ||
375e289e | 204 | unlock_two_nondirectories(inode, inode_bl); |
393d1d1d DTB |
205 | |
206 | iput(inode_bl); | |
207 | ||
208 | swap_boot_out: | |
209 | return err; | |
210 | } | |
211 | ||
5cdd7b2d | 212 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 213 | { |
496ad9aa | 214 | struct inode *inode = file_inode(filp); |
bab08ab9 | 215 | struct super_block *sb = inode->i_sb; |
617ba13b | 216 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 217 | unsigned int flags; |
ac27a0ec | 218 | |
af5bc92d | 219 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
220 | |
221 | switch (cmd) { | |
617ba13b | 222 | case EXT4_IOC_GETFLAGS: |
ff9ddf7e | 223 | ext4_get_inode_flags(ei); |
617ba13b | 224 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
ac27a0ec | 225 | return put_user(flags, (int __user *) arg); |
617ba13b | 226 | case EXT4_IOC_SETFLAGS: { |
ac27a0ec | 227 | handle_t *handle = NULL; |
4db46fc2 | 228 | int err, migrate = 0; |
617ba13b | 229 | struct ext4_iloc iloc; |
79906964 | 230 | unsigned int oldflags, mask, i; |
ac27a0ec DK |
231 | unsigned int jflag; |
232 | ||
2e149670 | 233 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
234 | return -EACCES; |
235 | ||
236 | if (get_user(flags, (int __user *) arg)) | |
237 | return -EFAULT; | |
238 | ||
a561be71 | 239 | err = mnt_want_write_file(filp); |
42a74f20 DH |
240 | if (err) |
241 | return err; | |
242 | ||
2dc6b0d4 | 243 | flags = ext4_mask_flags(inode->i_mode, flags); |
ac27a0ec | 244 | |
42a74f20 | 245 | err = -EPERM; |
ac27a0ec | 246 | mutex_lock(&inode->i_mutex); |
e47776a0 | 247 | /* Is it quota file? Do not allow user to mess with it */ |
42a74f20 DH |
248 | if (IS_NOQUOTA(inode)) |
249 | goto flags_out; | |
250 | ||
ac27a0ec DK |
251 | oldflags = ei->i_flags; |
252 | ||
253 | /* The JOURNAL_DATA flag is modifiable only by root */ | |
617ba13b | 254 | jflag = flags & EXT4_JOURNAL_DATA_FL; |
ac27a0ec DK |
255 | |
256 | /* | |
257 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
258 | * the relevant capability. | |
259 | * | |
260 | * This test looks nicer. Thanks to Pauline Middelink | |
261 | */ | |
617ba13b | 262 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { |
42a74f20 DH |
263 | if (!capable(CAP_LINUX_IMMUTABLE)) |
264 | goto flags_out; | |
ac27a0ec DK |
265 | } |
266 | ||
267 | /* | |
268 | * The JOURNAL_DATA flag can only be changed by | |
269 | * the relevant capability. | |
270 | */ | |
617ba13b | 271 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { |
42a74f20 DH |
272 | if (!capable(CAP_SYS_RESOURCE)) |
273 | goto flags_out; | |
ac27a0ec | 274 | } |
996bb9fd | 275 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) |
4db46fc2 | 276 | migrate = 1; |
ac27a0ec | 277 | |
c8d46e41 JZ |
278 | if (flags & EXT4_EOFBLOCKS_FL) { |
279 | /* we don't support adding EOFBLOCKS flag */ | |
280 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { | |
281 | err = -EOPNOTSUPP; | |
282 | goto flags_out; | |
283 | } | |
284 | } else if (oldflags & EXT4_EOFBLOCKS_FL) | |
285 | ext4_truncate(inode); | |
286 | ||
9924a92a | 287 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
ac27a0ec | 288 | if (IS_ERR(handle)) { |
42a74f20 DH |
289 | err = PTR_ERR(handle); |
290 | goto flags_out; | |
ac27a0ec DK |
291 | } |
292 | if (IS_SYNC(inode)) | |
0390131b | 293 | ext4_handle_sync(handle); |
617ba13b | 294 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec DK |
295 | if (err) |
296 | goto flags_err; | |
297 | ||
79906964 TT |
298 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { |
299 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
300 | continue; | |
301 | if (mask & flags) | |
302 | ext4_set_inode_flag(inode, i); | |
303 | else | |
304 | ext4_clear_inode_flag(inode, i); | |
305 | } | |
ac27a0ec | 306 | |
617ba13b | 307 | ext4_set_inode_flags(inode); |
ef7f3835 | 308 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 309 | |
617ba13b | 310 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 311 | flags_err: |
617ba13b | 312 | ext4_journal_stop(handle); |
42a74f20 DH |
313 | if (err) |
314 | goto flags_out; | |
ac27a0ec | 315 | |
617ba13b MC |
316 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) |
317 | err = ext4_change_inode_journal_flag(inode, jflag); | |
4db46fc2 AK |
318 | if (err) |
319 | goto flags_out; | |
996bb9fd TT |
320 | if (migrate) { |
321 | if (flags & EXT4_EXTENTS_FL) | |
322 | err = ext4_ext_migrate(inode); | |
323 | else | |
324 | err = ext4_ind_migrate(inode); | |
325 | } | |
326 | ||
42a74f20 | 327 | flags_out: |
ac27a0ec | 328 | mutex_unlock(&inode->i_mutex); |
2a79f17e | 329 | mnt_drop_write_file(filp); |
ac27a0ec DK |
330 | return err; |
331 | } | |
617ba13b MC |
332 | case EXT4_IOC_GETVERSION: |
333 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 334 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
335 | case EXT4_IOC_SETVERSION: |
336 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 337 | handle_t *handle; |
617ba13b | 338 | struct ext4_iloc iloc; |
ac27a0ec DK |
339 | __u32 generation; |
340 | int err; | |
341 | ||
2e149670 | 342 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 343 | return -EPERM; |
42a74f20 | 344 | |
814525f4 DW |
345 | if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, |
346 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { | |
347 | ext4_warning(sb, "Setting inode version is not " | |
348 | "supported with metadata_csum enabled."); | |
349 | return -ENOTTY; | |
350 | } | |
351 | ||
a561be71 | 352 | err = mnt_want_write_file(filp); |
42a74f20 DH |
353 | if (err) |
354 | return err; | |
355 | if (get_user(generation, (int __user *) arg)) { | |
356 | err = -EFAULT; | |
357 | goto setversion_out; | |
358 | } | |
ac27a0ec | 359 | |
6c2155b9 | 360 | mutex_lock(&inode->i_mutex); |
9924a92a | 361 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
362 | if (IS_ERR(handle)) { |
363 | err = PTR_ERR(handle); | |
6c2155b9 | 364 | goto unlock_out; |
42a74f20 | 365 | } |
617ba13b | 366 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 367 | if (err == 0) { |
ef7f3835 | 368 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 369 | inode->i_generation = generation; |
617ba13b | 370 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 371 | } |
617ba13b | 372 | ext4_journal_stop(handle); |
6c2155b9 DH |
373 | |
374 | unlock_out: | |
375 | mutex_unlock(&inode->i_mutex); | |
42a74f20 | 376 | setversion_out: |
2a79f17e | 377 | mnt_drop_write_file(filp); |
ac27a0ec DK |
378 | return err; |
379 | } | |
617ba13b MC |
380 | case EXT4_IOC_GROUP_EXTEND: { |
381 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 382 | int err, err2=0; |
ac27a0ec | 383 | |
8f82f840 YY |
384 | err = ext4_resize_begin(sb); |
385 | if (err) | |
386 | return err; | |
ac27a0ec | 387 | |
014a1770 DH |
388 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
389 | err = -EFAULT; | |
390 | goto group_extend_out; | |
391 | } | |
ac27a0ec | 392 | |
bab08ab9 TT |
393 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
394 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
395 | ext4_msg(sb, KERN_ERR, | |
396 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
397 | err = -EOPNOTSUPP; |
398 | goto group_extend_out; | |
bab08ab9 TT |
399 | } |
400 | ||
a561be71 | 401 | err = mnt_want_write_file(filp); |
42a74f20 | 402 | if (err) |
014a1770 | 403 | goto group_extend_out; |
42a74f20 | 404 | |
617ba13b | 405 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
406 | if (EXT4_SB(sb)->s_journal) { |
407 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
408 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
409 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
410 | } | |
7ffe1ea8 HK |
411 | if (err == 0) |
412 | err = err2; | |
2a79f17e | 413 | mnt_drop_write_file(filp); |
014a1770 | 414 | group_extend_out: |
8f82f840 | 415 | ext4_resize_end(sb); |
ac27a0ec DK |
416 | return err; |
417 | } | |
748de673 AF |
418 | |
419 | case EXT4_IOC_MOVE_EXT: { | |
420 | struct move_extent me; | |
2903ff01 AV |
421 | struct fd donor; |
422 | int err; | |
748de673 | 423 | |
4a58579b AF |
424 | if (!(filp->f_mode & FMODE_READ) || |
425 | !(filp->f_mode & FMODE_WRITE)) | |
426 | return -EBADF; | |
427 | ||
748de673 AF |
428 | if (copy_from_user(&me, |
429 | (struct move_extent __user *)arg, sizeof(me))) | |
430 | return -EFAULT; | |
4a58579b | 431 | me.moved_len = 0; |
748de673 | 432 | |
2903ff01 AV |
433 | donor = fdget(me.donor_fd); |
434 | if (!donor.file) | |
748de673 AF |
435 | return -EBADF; |
436 | ||
2903ff01 | 437 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
438 | err = -EBADF; |
439 | goto mext_out; | |
748de673 AF |
440 | } |
441 | ||
bab08ab9 TT |
442 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
443 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
444 | ext4_msg(sb, KERN_ERR, | |
445 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
446 | err = -EOPNOTSUPP; |
447 | goto mext_out; | |
bab08ab9 TT |
448 | } |
449 | ||
a561be71 | 450 | err = mnt_want_write_file(filp); |
4a58579b AF |
451 | if (err) |
452 | goto mext_out; | |
453 | ||
2903ff01 | 454 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 455 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 456 | mnt_drop_write_file(filp); |
748de673 | 457 | |
60e6679e | 458 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 459 | &me, sizeof(me))) |
4a58579b AF |
460 | err = -EFAULT; |
461 | mext_out: | |
2903ff01 | 462 | fdput(donor); |
748de673 AF |
463 | return err; |
464 | } | |
465 | ||
617ba13b MC |
466 | case EXT4_IOC_GROUP_ADD: { |
467 | struct ext4_new_group_data input; | |
ac046f1d | 468 | int err, err2=0; |
ac27a0ec | 469 | |
8f82f840 YY |
470 | err = ext4_resize_begin(sb); |
471 | if (err) | |
472 | return err; | |
ac27a0ec | 473 | |
617ba13b | 474 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
014a1770 DH |
475 | sizeof(input))) { |
476 | err = -EFAULT; | |
477 | goto group_add_out; | |
478 | } | |
ac27a0ec | 479 | |
bab08ab9 TT |
480 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
481 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
482 | ext4_msg(sb, KERN_ERR, | |
483 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
484 | err = -EOPNOTSUPP; |
485 | goto group_add_out; | |
bab08ab9 TT |
486 | } |
487 | ||
a561be71 | 488 | err = mnt_want_write_file(filp); |
42a74f20 | 489 | if (err) |
014a1770 | 490 | goto group_add_out; |
42a74f20 | 491 | |
617ba13b | 492 | err = ext4_group_add(sb, &input); |
ac046f1d PT |
493 | if (EXT4_SB(sb)->s_journal) { |
494 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
495 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
496 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
497 | } | |
7ffe1ea8 HK |
498 | if (err == 0) |
499 | err = err2; | |
2a79f17e | 500 | mnt_drop_write_file(filp); |
7f511862 TT |
501 | if (!err && ext4_has_group_desc_csum(sb) && |
502 | test_opt(sb, INIT_INODE_TABLE)) | |
503 | err = ext4_register_li_request(sb, input.group); | |
014a1770 | 504 | group_add_out: |
8f82f840 | 505 | ext4_resize_end(sb); |
ac27a0ec DK |
506 | return err; |
507 | } | |
508 | ||
c14c6fd5 | 509 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
510 | { |
511 | int err; | |
2e149670 | 512 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
513 | return -EACCES; |
514 | ||
a561be71 | 515 | err = mnt_want_write_file(filp); |
2a43a878 AK |
516 | if (err) |
517 | return err; | |
518 | /* | |
519 | * inode_mutex prevent write and truncate on the file. | |
520 | * Read still goes through. We take i_data_sem in | |
521 | * ext4_ext_swap_inode_data before we switch the | |
522 | * inode format to prevent read. | |
523 | */ | |
524 | mutex_lock(&(inode->i_mutex)); | |
525 | err = ext4_ext_migrate(inode); | |
526 | mutex_unlock(&(inode->i_mutex)); | |
2a79f17e | 527 | mnt_drop_write_file(filp); |
2a43a878 AK |
528 | return err; |
529 | } | |
c14c6fd5 | 530 | |
ccd2506b TT |
531 | case EXT4_IOC_ALLOC_DA_BLKS: |
532 | { | |
533 | int err; | |
2e149670 | 534 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
535 | return -EACCES; |
536 | ||
a561be71 | 537 | err = mnt_want_write_file(filp); |
ccd2506b TT |
538 | if (err) |
539 | return err; | |
540 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 541 | mnt_drop_write_file(filp); |
ccd2506b TT |
542 | return err; |
543 | } | |
544 | ||
393d1d1d DTB |
545 | case EXT4_IOC_SWAP_BOOT: |
546 | if (!(filp->f_mode & FMODE_WRITE)) | |
547 | return -EBADF; | |
548 | return swap_inode_boot_loader(sb, inode); | |
549 | ||
19c5246d YY |
550 | case EXT4_IOC_RESIZE_FS: { |
551 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 552 | int err = 0, err2 = 0; |
7f511862 | 553 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d YY |
554 | |
555 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
556 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
557 | ext4_msg(sb, KERN_ERR, | |
558 | "Online resizing not (yet) supported with bigalloc"); | |
559 | return -EOPNOTSUPP; | |
560 | } | |
561 | ||
19c5246d YY |
562 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
563 | sizeof(__u64))) { | |
564 | return -EFAULT; | |
565 | } | |
566 | ||
19c5246d YY |
567 | err = ext4_resize_begin(sb); |
568 | if (err) | |
569 | return err; | |
570 | ||
8cae6f71 | 571 | err = mnt_want_write_file(filp); |
19c5246d YY |
572 | if (err) |
573 | goto resizefs_out; | |
574 | ||
575 | err = ext4_resize_fs(sb, n_blocks_count); | |
576 | if (EXT4_SB(sb)->s_journal) { | |
577 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
578 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
579 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
580 | } | |
581 | if (err == 0) | |
582 | err = err2; | |
8cae6f71 | 583 | mnt_drop_write_file(filp); |
7f511862 TT |
584 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
585 | ext4_has_group_desc_csum(sb) && | |
586 | test_opt(sb, INIT_INODE_TABLE)) | |
587 | err = ext4_register_li_request(sb, o_group); | |
588 | ||
19c5246d YY |
589 | resizefs_out: |
590 | ext4_resize_end(sb); | |
591 | return err; | |
592 | } | |
593 | ||
e681c047 LC |
594 | case FITRIM: |
595 | { | |
41431792 | 596 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
e681c047 LC |
597 | struct fstrim_range range; |
598 | int ret = 0; | |
599 | ||
600 | if (!capable(CAP_SYS_ADMIN)) | |
601 | return -EPERM; | |
602 | ||
41431792 LC |
603 | if (!blk_queue_discard(q)) |
604 | return -EOPNOTSUPP; | |
605 | ||
e6705f7c | 606 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
607 | sizeof(range))) |
608 | return -EFAULT; | |
609 | ||
5c2ed62f LC |
610 | range.minlen = max((unsigned int)range.minlen, |
611 | q->limits.discard_granularity); | |
e681c047 LC |
612 | ret = ext4_trim_fs(sb, &range); |
613 | if (ret < 0) | |
614 | return ret; | |
615 | ||
e6705f7c | 616 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
617 | sizeof(range))) |
618 | return -EFAULT; | |
619 | ||
620 | return 0; | |
621 | } | |
7869a4a6 TT |
622 | case EXT4_IOC_PRECACHE_EXTENTS: |
623 | return ext4_ext_precache(inode); | |
e681c047 | 624 | |
ac27a0ec DK |
625 | default: |
626 | return -ENOTTY; | |
627 | } | |
628 | } | |
629 | ||
630 | #ifdef CONFIG_COMPAT | |
617ba13b | 631 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 632 | { |
ac27a0ec DK |
633 | /* These are just misnamed, they actually get/put from/to user an int */ |
634 | switch (cmd) { | |
617ba13b MC |
635 | case EXT4_IOC32_GETFLAGS: |
636 | cmd = EXT4_IOC_GETFLAGS; | |
ac27a0ec | 637 | break; |
617ba13b MC |
638 | case EXT4_IOC32_SETFLAGS: |
639 | cmd = EXT4_IOC_SETFLAGS; | |
ac27a0ec | 640 | break; |
617ba13b MC |
641 | case EXT4_IOC32_GETVERSION: |
642 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 643 | break; |
617ba13b MC |
644 | case EXT4_IOC32_SETVERSION: |
645 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 646 | break; |
617ba13b MC |
647 | case EXT4_IOC32_GROUP_EXTEND: |
648 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 649 | break; |
617ba13b MC |
650 | case EXT4_IOC32_GETVERSION_OLD: |
651 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 652 | break; |
617ba13b MC |
653 | case EXT4_IOC32_SETVERSION_OLD: |
654 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 655 | break; |
617ba13b MC |
656 | case EXT4_IOC32_GETRSVSZ: |
657 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 658 | break; |
617ba13b MC |
659 | case EXT4_IOC32_SETRSVSZ: |
660 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 661 | break; |
4d92dc0f BH |
662 | case EXT4_IOC32_GROUP_ADD: { |
663 | struct compat_ext4_new_group_input __user *uinput; | |
664 | struct ext4_new_group_input input; | |
665 | mm_segment_t old_fs; | |
666 | int err; | |
667 | ||
668 | uinput = compat_ptr(arg); | |
669 | err = get_user(input.group, &uinput->group); | |
670 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
671 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
672 | err |= get_user(input.inode_table, &uinput->inode_table); | |
673 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
674 | err |= get_user(input.reserved_blocks, | |
675 | &uinput->reserved_blocks); | |
676 | if (err) | |
677 | return -EFAULT; | |
678 | old_fs = get_fs(); | |
679 | set_fs(KERNEL_DS); | |
680 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, | |
681 | (unsigned long) &input); | |
682 | set_fs(old_fs); | |
683 | return err; | |
684 | } | |
b684b2ee | 685 | case EXT4_IOC_MOVE_EXT: |
a56e69c2 | 686 | case FITRIM: |
19c5246d | 687 | case EXT4_IOC_RESIZE_FS: |
7869a4a6 | 688 | case EXT4_IOC_PRECACHE_EXTENTS: |
b684b2ee | 689 | break; |
ac27a0ec DK |
690 | default: |
691 | return -ENOIOCTLCMD; | |
692 | } | |
5cdd7b2d | 693 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
694 | } |
695 | #endif |