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; | |
104 | struct ext4_inode_info *ei; | |
105 | struct ext4_inode_info *ei_bl; | |
106 | struct ext4_sb_info *sbi; | |
107 | ||
108 | if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) { | |
109 | err = -EINVAL; | |
110 | goto swap_boot_out; | |
111 | } | |
112 | ||
113 | if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) { | |
114 | err = -EPERM; | |
115 | goto swap_boot_out; | |
116 | } | |
117 | ||
118 | sbi = EXT4_SB(sb); | |
119 | ei = EXT4_I(inode); | |
120 | ||
121 | inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); | |
122 | if (IS_ERR(inode_bl)) { | |
123 | err = PTR_ERR(inode_bl); | |
124 | goto swap_boot_out; | |
125 | } | |
126 | ei_bl = EXT4_I(inode_bl); | |
127 | ||
128 | filemap_flush(inode->i_mapping); | |
129 | filemap_flush(inode_bl->i_mapping); | |
130 | ||
131 | /* Protect orig inodes against a truncate and make sure, | |
132 | * that only 1 swap_inode_boot_loader is running. */ | |
133 | ext4_inode_double_lock(inode, inode_bl); | |
134 | ||
135 | truncate_inode_pages(&inode->i_data, 0); | |
136 | truncate_inode_pages(&inode_bl->i_data, 0); | |
137 | ||
138 | /* Wait for all existing dio workers */ | |
139 | ext4_inode_block_unlocked_dio(inode); | |
140 | ext4_inode_block_unlocked_dio(inode_bl); | |
141 | inode_dio_wait(inode); | |
142 | inode_dio_wait(inode_bl); | |
143 | ||
144 | handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); | |
145 | if (IS_ERR(handle)) { | |
146 | err = -EINVAL; | |
147 | goto swap_boot_out; | |
148 | } | |
149 | ||
150 | /* Protect extent tree against block allocations via delalloc */ | |
151 | ext4_double_down_write_data_sem(inode, inode_bl); | |
152 | ||
153 | if (inode_bl->i_nlink == 0) { | |
154 | /* this inode has never been used as a BOOT_LOADER */ | |
155 | set_nlink(inode_bl, 1); | |
156 | i_uid_write(inode_bl, 0); | |
157 | i_gid_write(inode_bl, 0); | |
158 | inode_bl->i_flags = 0; | |
159 | ei_bl->i_flags = 0; | |
160 | inode_bl->i_version = 1; | |
161 | i_size_write(inode_bl, 0); | |
162 | inode_bl->i_mode = S_IFREG; | |
163 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, | |
164 | EXT4_FEATURE_INCOMPAT_EXTENTS)) { | |
165 | ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); | |
166 | ext4_ext_tree_init(handle, inode_bl); | |
167 | } else | |
168 | memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); | |
169 | } | |
170 | ||
171 | swap_inode_data(inode, inode_bl); | |
172 | ||
173 | inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode); | |
174 | ||
175 | spin_lock(&sbi->s_next_gen_lock); | |
176 | inode->i_generation = sbi->s_next_generation++; | |
177 | inode_bl->i_generation = sbi->s_next_generation++; | |
178 | spin_unlock(&sbi->s_next_gen_lock); | |
179 | ||
180 | ext4_discard_preallocations(inode); | |
181 | ||
182 | err = ext4_mark_inode_dirty(handle, inode); | |
183 | if (err < 0) { | |
184 | ext4_warning(inode->i_sb, | |
185 | "couldn't mark inode #%lu dirty (err %d)", | |
186 | inode->i_ino, err); | |
187 | /* Revert all changes: */ | |
188 | swap_inode_data(inode, inode_bl); | |
189 | } else { | |
190 | err = ext4_mark_inode_dirty(handle, inode_bl); | |
191 | if (err < 0) { | |
192 | ext4_warning(inode_bl->i_sb, | |
193 | "couldn't mark inode #%lu dirty (err %d)", | |
194 | inode_bl->i_ino, err); | |
195 | /* Revert all changes: */ | |
196 | swap_inode_data(inode, inode_bl); | |
197 | ext4_mark_inode_dirty(handle, inode); | |
198 | } | |
199 | } | |
200 | ||
201 | ext4_journal_stop(handle); | |
202 | ||
203 | ext4_double_up_write_data_sem(inode, inode_bl); | |
204 | ||
205 | ext4_inode_resume_unlocked_dio(inode); | |
206 | ext4_inode_resume_unlocked_dio(inode_bl); | |
207 | ||
208 | ext4_inode_double_unlock(inode, inode_bl); | |
209 | ||
210 | iput(inode_bl); | |
211 | ||
212 | swap_boot_out: | |
213 | return err; | |
214 | } | |
215 | ||
5cdd7b2d | 216 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 217 | { |
496ad9aa | 218 | struct inode *inode = file_inode(filp); |
bab08ab9 | 219 | struct super_block *sb = inode->i_sb; |
617ba13b | 220 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 221 | unsigned int flags; |
ac27a0ec | 222 | |
af5bc92d | 223 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
224 | |
225 | switch (cmd) { | |
617ba13b | 226 | case EXT4_IOC_GETFLAGS: |
ff9ddf7e | 227 | ext4_get_inode_flags(ei); |
617ba13b | 228 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
ac27a0ec | 229 | return put_user(flags, (int __user *) arg); |
617ba13b | 230 | case EXT4_IOC_SETFLAGS: { |
ac27a0ec | 231 | handle_t *handle = NULL; |
4db46fc2 | 232 | int err, migrate = 0; |
617ba13b | 233 | struct ext4_iloc iloc; |
79906964 | 234 | unsigned int oldflags, mask, i; |
ac27a0ec DK |
235 | unsigned int jflag; |
236 | ||
2e149670 | 237 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
238 | return -EACCES; |
239 | ||
240 | if (get_user(flags, (int __user *) arg)) | |
241 | return -EFAULT; | |
242 | ||
a561be71 | 243 | err = mnt_want_write_file(filp); |
42a74f20 DH |
244 | if (err) |
245 | return err; | |
246 | ||
2dc6b0d4 | 247 | flags = ext4_mask_flags(inode->i_mode, flags); |
ac27a0ec | 248 | |
42a74f20 | 249 | err = -EPERM; |
ac27a0ec | 250 | mutex_lock(&inode->i_mutex); |
e47776a0 | 251 | /* Is it quota file? Do not allow user to mess with it */ |
42a74f20 DH |
252 | if (IS_NOQUOTA(inode)) |
253 | goto flags_out; | |
254 | ||
ac27a0ec DK |
255 | oldflags = ei->i_flags; |
256 | ||
257 | /* The JOURNAL_DATA flag is modifiable only by root */ | |
617ba13b | 258 | jflag = flags & EXT4_JOURNAL_DATA_FL; |
ac27a0ec DK |
259 | |
260 | /* | |
261 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
262 | * the relevant capability. | |
263 | * | |
264 | * This test looks nicer. Thanks to Pauline Middelink | |
265 | */ | |
617ba13b | 266 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { |
42a74f20 DH |
267 | if (!capable(CAP_LINUX_IMMUTABLE)) |
268 | goto flags_out; | |
ac27a0ec DK |
269 | } |
270 | ||
271 | /* | |
272 | * The JOURNAL_DATA flag can only be changed by | |
273 | * the relevant capability. | |
274 | */ | |
617ba13b | 275 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { |
42a74f20 DH |
276 | if (!capable(CAP_SYS_RESOURCE)) |
277 | goto flags_out; | |
ac27a0ec | 278 | } |
996bb9fd | 279 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) |
4db46fc2 | 280 | migrate = 1; |
ac27a0ec | 281 | |
c8d46e41 JZ |
282 | if (flags & EXT4_EOFBLOCKS_FL) { |
283 | /* we don't support adding EOFBLOCKS flag */ | |
284 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { | |
285 | err = -EOPNOTSUPP; | |
286 | goto flags_out; | |
287 | } | |
288 | } else if (oldflags & EXT4_EOFBLOCKS_FL) | |
289 | ext4_truncate(inode); | |
290 | ||
9924a92a | 291 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
ac27a0ec | 292 | if (IS_ERR(handle)) { |
42a74f20 DH |
293 | err = PTR_ERR(handle); |
294 | goto flags_out; | |
ac27a0ec DK |
295 | } |
296 | if (IS_SYNC(inode)) | |
0390131b | 297 | ext4_handle_sync(handle); |
617ba13b | 298 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec DK |
299 | if (err) |
300 | goto flags_err; | |
301 | ||
79906964 TT |
302 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { |
303 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
304 | continue; | |
305 | if (mask & flags) | |
306 | ext4_set_inode_flag(inode, i); | |
307 | else | |
308 | ext4_clear_inode_flag(inode, i); | |
309 | } | |
ac27a0ec | 310 | |
617ba13b | 311 | ext4_set_inode_flags(inode); |
ef7f3835 | 312 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 313 | |
617ba13b | 314 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 315 | flags_err: |
617ba13b | 316 | ext4_journal_stop(handle); |
42a74f20 DH |
317 | if (err) |
318 | goto flags_out; | |
ac27a0ec | 319 | |
617ba13b MC |
320 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) |
321 | err = ext4_change_inode_journal_flag(inode, jflag); | |
4db46fc2 AK |
322 | if (err) |
323 | goto flags_out; | |
996bb9fd TT |
324 | if (migrate) { |
325 | if (flags & EXT4_EXTENTS_FL) | |
326 | err = ext4_ext_migrate(inode); | |
327 | else | |
328 | err = ext4_ind_migrate(inode); | |
329 | } | |
330 | ||
42a74f20 | 331 | flags_out: |
ac27a0ec | 332 | mutex_unlock(&inode->i_mutex); |
2a79f17e | 333 | mnt_drop_write_file(filp); |
ac27a0ec DK |
334 | return err; |
335 | } | |
617ba13b MC |
336 | case EXT4_IOC_GETVERSION: |
337 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 338 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
339 | case EXT4_IOC_SETVERSION: |
340 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 341 | handle_t *handle; |
617ba13b | 342 | struct ext4_iloc iloc; |
ac27a0ec DK |
343 | __u32 generation; |
344 | int err; | |
345 | ||
2e149670 | 346 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 347 | return -EPERM; |
42a74f20 | 348 | |
814525f4 DW |
349 | if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, |
350 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { | |
351 | ext4_warning(sb, "Setting inode version is not " | |
352 | "supported with metadata_csum enabled."); | |
353 | return -ENOTTY; | |
354 | } | |
355 | ||
a561be71 | 356 | err = mnt_want_write_file(filp); |
42a74f20 DH |
357 | if (err) |
358 | return err; | |
359 | if (get_user(generation, (int __user *) arg)) { | |
360 | err = -EFAULT; | |
361 | goto setversion_out; | |
362 | } | |
ac27a0ec | 363 | |
6c2155b9 | 364 | mutex_lock(&inode->i_mutex); |
9924a92a | 365 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
366 | if (IS_ERR(handle)) { |
367 | err = PTR_ERR(handle); | |
6c2155b9 | 368 | goto unlock_out; |
42a74f20 | 369 | } |
617ba13b | 370 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 371 | if (err == 0) { |
ef7f3835 | 372 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 373 | inode->i_generation = generation; |
617ba13b | 374 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 375 | } |
617ba13b | 376 | ext4_journal_stop(handle); |
6c2155b9 DH |
377 | |
378 | unlock_out: | |
379 | mutex_unlock(&inode->i_mutex); | |
42a74f20 | 380 | setversion_out: |
2a79f17e | 381 | mnt_drop_write_file(filp); |
ac27a0ec DK |
382 | return err; |
383 | } | |
617ba13b MC |
384 | case EXT4_IOC_GROUP_EXTEND: { |
385 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 386 | int err, err2=0; |
ac27a0ec | 387 | |
8f82f840 YY |
388 | err = ext4_resize_begin(sb); |
389 | if (err) | |
390 | return err; | |
ac27a0ec | 391 | |
014a1770 DH |
392 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
393 | err = -EFAULT; | |
394 | goto group_extend_out; | |
395 | } | |
ac27a0ec | 396 | |
bab08ab9 TT |
397 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
398 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
399 | ext4_msg(sb, KERN_ERR, | |
400 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
401 | err = -EOPNOTSUPP; |
402 | goto group_extend_out; | |
bab08ab9 TT |
403 | } |
404 | ||
a561be71 | 405 | err = mnt_want_write_file(filp); |
42a74f20 | 406 | if (err) |
014a1770 | 407 | goto group_extend_out; |
42a74f20 | 408 | |
617ba13b | 409 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
410 | if (EXT4_SB(sb)->s_journal) { |
411 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
412 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
413 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
414 | } | |
7ffe1ea8 HK |
415 | if (err == 0) |
416 | err = err2; | |
2a79f17e | 417 | mnt_drop_write_file(filp); |
014a1770 | 418 | group_extend_out: |
8f82f840 | 419 | ext4_resize_end(sb); |
ac27a0ec DK |
420 | return err; |
421 | } | |
748de673 AF |
422 | |
423 | case EXT4_IOC_MOVE_EXT: { | |
424 | struct move_extent me; | |
2903ff01 AV |
425 | struct fd donor; |
426 | int err; | |
748de673 | 427 | |
4a58579b AF |
428 | if (!(filp->f_mode & FMODE_READ) || |
429 | !(filp->f_mode & FMODE_WRITE)) | |
430 | return -EBADF; | |
431 | ||
748de673 AF |
432 | if (copy_from_user(&me, |
433 | (struct move_extent __user *)arg, sizeof(me))) | |
434 | return -EFAULT; | |
4a58579b | 435 | me.moved_len = 0; |
748de673 | 436 | |
2903ff01 AV |
437 | donor = fdget(me.donor_fd); |
438 | if (!donor.file) | |
748de673 AF |
439 | return -EBADF; |
440 | ||
2903ff01 | 441 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
442 | err = -EBADF; |
443 | goto mext_out; | |
748de673 AF |
444 | } |
445 | ||
bab08ab9 TT |
446 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
447 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
448 | ext4_msg(sb, KERN_ERR, | |
449 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
450 | err = -EOPNOTSUPP; |
451 | goto mext_out; | |
bab08ab9 TT |
452 | } |
453 | ||
a561be71 | 454 | err = mnt_want_write_file(filp); |
4a58579b AF |
455 | if (err) |
456 | goto mext_out; | |
457 | ||
2903ff01 | 458 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 459 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 460 | mnt_drop_write_file(filp); |
748de673 | 461 | |
60e6679e | 462 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 463 | &me, sizeof(me))) |
4a58579b AF |
464 | err = -EFAULT; |
465 | mext_out: | |
2903ff01 | 466 | fdput(donor); |
748de673 AF |
467 | return err; |
468 | } | |
469 | ||
617ba13b MC |
470 | case EXT4_IOC_GROUP_ADD: { |
471 | struct ext4_new_group_data input; | |
ac046f1d | 472 | int err, err2=0; |
ac27a0ec | 473 | |
8f82f840 YY |
474 | err = ext4_resize_begin(sb); |
475 | if (err) | |
476 | return err; | |
ac27a0ec | 477 | |
617ba13b | 478 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
014a1770 DH |
479 | sizeof(input))) { |
480 | err = -EFAULT; | |
481 | goto group_add_out; | |
482 | } | |
ac27a0ec | 483 | |
bab08ab9 TT |
484 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
485 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
486 | ext4_msg(sb, KERN_ERR, | |
487 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
488 | err = -EOPNOTSUPP; |
489 | goto group_add_out; | |
bab08ab9 TT |
490 | } |
491 | ||
a561be71 | 492 | err = mnt_want_write_file(filp); |
42a74f20 | 493 | if (err) |
014a1770 | 494 | goto group_add_out; |
42a74f20 | 495 | |
617ba13b | 496 | err = ext4_group_add(sb, &input); |
ac046f1d PT |
497 | if (EXT4_SB(sb)->s_journal) { |
498 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
499 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
500 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
501 | } | |
7ffe1ea8 HK |
502 | if (err == 0) |
503 | err = err2; | |
2a79f17e | 504 | mnt_drop_write_file(filp); |
7f511862 TT |
505 | if (!err && ext4_has_group_desc_csum(sb) && |
506 | test_opt(sb, INIT_INODE_TABLE)) | |
507 | err = ext4_register_li_request(sb, input.group); | |
014a1770 | 508 | group_add_out: |
8f82f840 | 509 | ext4_resize_end(sb); |
ac27a0ec DK |
510 | return err; |
511 | } | |
512 | ||
c14c6fd5 | 513 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
514 | { |
515 | int err; | |
2e149670 | 516 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
517 | return -EACCES; |
518 | ||
a561be71 | 519 | err = mnt_want_write_file(filp); |
2a43a878 AK |
520 | if (err) |
521 | return err; | |
522 | /* | |
523 | * inode_mutex prevent write and truncate on the file. | |
524 | * Read still goes through. We take i_data_sem in | |
525 | * ext4_ext_swap_inode_data before we switch the | |
526 | * inode format to prevent read. | |
527 | */ | |
528 | mutex_lock(&(inode->i_mutex)); | |
529 | err = ext4_ext_migrate(inode); | |
530 | mutex_unlock(&(inode->i_mutex)); | |
2a79f17e | 531 | mnt_drop_write_file(filp); |
2a43a878 AK |
532 | return err; |
533 | } | |
c14c6fd5 | 534 | |
ccd2506b TT |
535 | case EXT4_IOC_ALLOC_DA_BLKS: |
536 | { | |
537 | int err; | |
2e149670 | 538 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
539 | return -EACCES; |
540 | ||
a561be71 | 541 | err = mnt_want_write_file(filp); |
ccd2506b TT |
542 | if (err) |
543 | return err; | |
544 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 545 | mnt_drop_write_file(filp); |
ccd2506b TT |
546 | return err; |
547 | } | |
548 | ||
393d1d1d DTB |
549 | case EXT4_IOC_SWAP_BOOT: |
550 | if (!(filp->f_mode & FMODE_WRITE)) | |
551 | return -EBADF; | |
552 | return swap_inode_boot_loader(sb, inode); | |
553 | ||
19c5246d YY |
554 | case EXT4_IOC_RESIZE_FS: { |
555 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 556 | int err = 0, err2 = 0; |
7f511862 | 557 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d YY |
558 | |
559 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
560 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
561 | ext4_msg(sb, KERN_ERR, | |
562 | "Online resizing not (yet) supported with bigalloc"); | |
563 | return -EOPNOTSUPP; | |
564 | } | |
565 | ||
19c5246d YY |
566 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
567 | sizeof(__u64))) { | |
568 | return -EFAULT; | |
569 | } | |
570 | ||
19c5246d YY |
571 | err = ext4_resize_begin(sb); |
572 | if (err) | |
573 | return err; | |
574 | ||
8cae6f71 | 575 | err = mnt_want_write_file(filp); |
19c5246d YY |
576 | if (err) |
577 | goto resizefs_out; | |
578 | ||
579 | err = ext4_resize_fs(sb, n_blocks_count); | |
580 | if (EXT4_SB(sb)->s_journal) { | |
581 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
582 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
583 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
584 | } | |
585 | if (err == 0) | |
586 | err = err2; | |
8cae6f71 | 587 | mnt_drop_write_file(filp); |
7f511862 TT |
588 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
589 | ext4_has_group_desc_csum(sb) && | |
590 | test_opt(sb, INIT_INODE_TABLE)) | |
591 | err = ext4_register_li_request(sb, o_group); | |
592 | ||
19c5246d YY |
593 | resizefs_out: |
594 | ext4_resize_end(sb); | |
595 | return err; | |
596 | } | |
597 | ||
e681c047 LC |
598 | case FITRIM: |
599 | { | |
41431792 | 600 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
e681c047 LC |
601 | struct fstrim_range range; |
602 | int ret = 0; | |
603 | ||
604 | if (!capable(CAP_SYS_ADMIN)) | |
605 | return -EPERM; | |
606 | ||
41431792 LC |
607 | if (!blk_queue_discard(q)) |
608 | return -EOPNOTSUPP; | |
609 | ||
e6705f7c | 610 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
611 | sizeof(range))) |
612 | return -EFAULT; | |
613 | ||
5c2ed62f LC |
614 | range.minlen = max((unsigned int)range.minlen, |
615 | q->limits.discard_granularity); | |
e681c047 LC |
616 | ret = ext4_trim_fs(sb, &range); |
617 | if (ret < 0) | |
618 | return ret; | |
619 | ||
e6705f7c | 620 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
621 | sizeof(range))) |
622 | return -EFAULT; | |
623 | ||
624 | return 0; | |
625 | } | |
7869a4a6 TT |
626 | case EXT4_IOC_PRECACHE_EXTENTS: |
627 | return ext4_ext_precache(inode); | |
e681c047 | 628 | |
ac27a0ec DK |
629 | default: |
630 | return -ENOTTY; | |
631 | } | |
632 | } | |
633 | ||
634 | #ifdef CONFIG_COMPAT | |
617ba13b | 635 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 636 | { |
ac27a0ec DK |
637 | /* These are just misnamed, they actually get/put from/to user an int */ |
638 | switch (cmd) { | |
617ba13b MC |
639 | case EXT4_IOC32_GETFLAGS: |
640 | cmd = EXT4_IOC_GETFLAGS; | |
ac27a0ec | 641 | break; |
617ba13b MC |
642 | case EXT4_IOC32_SETFLAGS: |
643 | cmd = EXT4_IOC_SETFLAGS; | |
ac27a0ec | 644 | break; |
617ba13b MC |
645 | case EXT4_IOC32_GETVERSION: |
646 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 647 | break; |
617ba13b MC |
648 | case EXT4_IOC32_SETVERSION: |
649 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 650 | break; |
617ba13b MC |
651 | case EXT4_IOC32_GROUP_EXTEND: |
652 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 653 | break; |
617ba13b MC |
654 | case EXT4_IOC32_GETVERSION_OLD: |
655 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 656 | break; |
617ba13b MC |
657 | case EXT4_IOC32_SETVERSION_OLD: |
658 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 659 | break; |
617ba13b MC |
660 | case EXT4_IOC32_GETRSVSZ: |
661 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 662 | break; |
617ba13b MC |
663 | case EXT4_IOC32_SETRSVSZ: |
664 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 665 | break; |
4d92dc0f BH |
666 | case EXT4_IOC32_GROUP_ADD: { |
667 | struct compat_ext4_new_group_input __user *uinput; | |
668 | struct ext4_new_group_input input; | |
669 | mm_segment_t old_fs; | |
670 | int err; | |
671 | ||
672 | uinput = compat_ptr(arg); | |
673 | err = get_user(input.group, &uinput->group); | |
674 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
675 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
676 | err |= get_user(input.inode_table, &uinput->inode_table); | |
677 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
678 | err |= get_user(input.reserved_blocks, | |
679 | &uinput->reserved_blocks); | |
680 | if (err) | |
681 | return -EFAULT; | |
682 | old_fs = get_fs(); | |
683 | set_fs(KERNEL_DS); | |
684 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, | |
685 | (unsigned long) &input); | |
686 | set_fs(old_fs); | |
687 | return err; | |
688 | } | |
b684b2ee | 689 | case EXT4_IOC_MOVE_EXT: |
a56e69c2 | 690 | case FITRIM: |
19c5246d | 691 | case EXT4_IOC_RESIZE_FS: |
7869a4a6 | 692 | case EXT4_IOC_PRECACHE_EXTENTS: |
b684b2ee | 693 | break; |
ac27a0ec DK |
694 | default: |
695 | return -ENOIOCTLCMD; | |
696 | } | |
5cdd7b2d | 697 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
698 | } |
699 | #endif |