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Commit | Line | Data |
---|---|---|
ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/ioctl.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | */ | |
9 | ||
10 | #include <linux/fs.h> | |
ac27a0ec | 11 | #include <linux/capability.h> |
ac27a0ec DK |
12 | #include <linux/time.h> |
13 | #include <linux/compat.h> | |
42a74f20 | 14 | #include <linux/mount.h> |
748de673 | 15 | #include <linux/file.h> |
ac27a0ec | 16 | #include <asm/uaccess.h> |
3dcf5451 CH |
17 | #include "ext4_jbd2.h" |
18 | #include "ext4.h" | |
ac27a0ec | 19 | |
19c5246d YY |
20 | #define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1) |
21 | ||
393d1d1d DTB |
22 | /** |
23 | * Swap memory between @a and @b for @len bytes. | |
24 | * | |
25 | * @a: pointer to first memory area | |
26 | * @b: pointer to second memory area | |
27 | * @len: number of bytes to swap | |
28 | * | |
29 | */ | |
30 | static void memswap(void *a, void *b, size_t len) | |
31 | { | |
32 | unsigned char *ap, *bp; | |
33 | unsigned char tmp; | |
34 | ||
35 | ap = (unsigned char *)a; | |
36 | bp = (unsigned char *)b; | |
37 | while (len-- > 0) { | |
38 | tmp = *ap; | |
39 | *ap = *bp; | |
40 | *bp = tmp; | |
41 | ap++; | |
42 | bp++; | |
43 | } | |
44 | } | |
45 | ||
46 | /** | |
47 | * Swap i_data and associated attributes between @inode1 and @inode2. | |
48 | * This function is used for the primary swap between inode1 and inode2 | |
49 | * and also to revert this primary swap in case of errors. | |
50 | * | |
51 | * Therefore you have to make sure, that calling this method twice | |
52 | * will revert all changes. | |
53 | * | |
54 | * @inode1: pointer to first inode | |
55 | * @inode2: pointer to second inode | |
56 | */ | |
57 | static void swap_inode_data(struct inode *inode1, struct inode *inode2) | |
58 | { | |
59 | loff_t isize; | |
60 | struct ext4_inode_info *ei1; | |
61 | struct ext4_inode_info *ei2; | |
62 | ||
63 | ei1 = EXT4_I(inode1); | |
64 | ei2 = EXT4_I(inode2); | |
65 | ||
66 | memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags)); | |
67 | memswap(&inode1->i_version, &inode2->i_version, | |
68 | sizeof(inode1->i_version)); | |
69 | memswap(&inode1->i_blocks, &inode2->i_blocks, | |
70 | sizeof(inode1->i_blocks)); | |
71 | memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes)); | |
72 | memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime)); | |
73 | memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime)); | |
74 | ||
75 | memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); | |
76 | memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags)); | |
77 | memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize)); | |
cde2d7a7 TT |
78 | ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); |
79 | ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); | |
393d1d1d DTB |
80 | |
81 | isize = i_size_read(inode1); | |
82 | i_size_write(inode1, i_size_read(inode2)); | |
83 | i_size_write(inode2, isize); | |
84 | } | |
85 | ||
86 | /** | |
87 | * Swap the information from the given @inode and the inode | |
88 | * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other | |
89 | * important fields of the inodes. | |
90 | * | |
91 | * @sb: the super block of the filesystem | |
92 | * @inode: the inode to swap with EXT4_BOOT_LOADER_INO | |
93 | * | |
94 | */ | |
95 | static long swap_inode_boot_loader(struct super_block *sb, | |
96 | struct inode *inode) | |
97 | { | |
98 | handle_t *handle; | |
99 | int err; | |
100 | struct inode *inode_bl; | |
393d1d1d | 101 | struct ext4_inode_info *ei_bl; |
d7092ae2 | 102 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
393d1d1d | 103 | |
d8558a29 TT |
104 | if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) |
105 | return -EINVAL; | |
393d1d1d | 106 | |
d8558a29 TT |
107 | if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) |
108 | return -EPERM; | |
393d1d1d | 109 | |
393d1d1d | 110 | inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); |
d8558a29 TT |
111 | if (IS_ERR(inode_bl)) |
112 | return PTR_ERR(inode_bl); | |
393d1d1d DTB |
113 | ei_bl = EXT4_I(inode_bl); |
114 | ||
115 | filemap_flush(inode->i_mapping); | |
116 | filemap_flush(inode_bl->i_mapping); | |
117 | ||
118 | /* Protect orig inodes against a truncate and make sure, | |
119 | * that only 1 swap_inode_boot_loader is running. */ | |
375e289e | 120 | lock_two_nondirectories(inode, inode_bl); |
393d1d1d DTB |
121 | |
122 | truncate_inode_pages(&inode->i_data, 0); | |
123 | truncate_inode_pages(&inode_bl->i_data, 0); | |
124 | ||
125 | /* Wait for all existing dio workers */ | |
126 | ext4_inode_block_unlocked_dio(inode); | |
127 | ext4_inode_block_unlocked_dio(inode_bl); | |
128 | inode_dio_wait(inode); | |
129 | inode_dio_wait(inode_bl); | |
130 | ||
131 | handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); | |
132 | if (IS_ERR(handle)) { | |
133 | err = -EINVAL; | |
30d29b11 | 134 | goto journal_err_out; |
393d1d1d DTB |
135 | } |
136 | ||
137 | /* Protect extent tree against block allocations via delalloc */ | |
138 | ext4_double_down_write_data_sem(inode, inode_bl); | |
139 | ||
140 | if (inode_bl->i_nlink == 0) { | |
141 | /* this inode has never been used as a BOOT_LOADER */ | |
142 | set_nlink(inode_bl, 1); | |
143 | i_uid_write(inode_bl, 0); | |
144 | i_gid_write(inode_bl, 0); | |
145 | inode_bl->i_flags = 0; | |
146 | ei_bl->i_flags = 0; | |
147 | inode_bl->i_version = 1; | |
148 | i_size_write(inode_bl, 0); | |
149 | inode_bl->i_mode = S_IFREG; | |
150 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, | |
151 | EXT4_FEATURE_INCOMPAT_EXTENTS)) { | |
152 | ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); | |
153 | ext4_ext_tree_init(handle, inode_bl); | |
154 | } else | |
155 | memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); | |
156 | } | |
157 | ||
158 | swap_inode_data(inode, inode_bl); | |
159 | ||
160 | inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode); | |
161 | ||
162 | spin_lock(&sbi->s_next_gen_lock); | |
163 | inode->i_generation = sbi->s_next_generation++; | |
164 | inode_bl->i_generation = sbi->s_next_generation++; | |
165 | spin_unlock(&sbi->s_next_gen_lock); | |
166 | ||
167 | ext4_discard_preallocations(inode); | |
168 | ||
169 | err = ext4_mark_inode_dirty(handle, inode); | |
170 | if (err < 0) { | |
171 | ext4_warning(inode->i_sb, | |
172 | "couldn't mark inode #%lu dirty (err %d)", | |
173 | inode->i_ino, err); | |
174 | /* Revert all changes: */ | |
175 | swap_inode_data(inode, inode_bl); | |
176 | } else { | |
177 | err = ext4_mark_inode_dirty(handle, inode_bl); | |
178 | if (err < 0) { | |
179 | ext4_warning(inode_bl->i_sb, | |
180 | "couldn't mark inode #%lu dirty (err %d)", | |
181 | inode_bl->i_ino, err); | |
182 | /* Revert all changes: */ | |
183 | swap_inode_data(inode, inode_bl); | |
184 | ext4_mark_inode_dirty(handle, inode); | |
185 | } | |
186 | } | |
393d1d1d | 187 | ext4_journal_stop(handle); |
393d1d1d DTB |
188 | ext4_double_up_write_data_sem(inode, inode_bl); |
189 | ||
30d29b11 | 190 | journal_err_out: |
393d1d1d DTB |
191 | ext4_inode_resume_unlocked_dio(inode); |
192 | ext4_inode_resume_unlocked_dio(inode_bl); | |
375e289e | 193 | unlock_two_nondirectories(inode, inode_bl); |
393d1d1d | 194 | iput(inode_bl); |
393d1d1d DTB |
195 | return err; |
196 | } | |
197 | ||
5cdd7b2d | 198 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 199 | { |
496ad9aa | 200 | struct inode *inode = file_inode(filp); |
bab08ab9 | 201 | struct super_block *sb = inode->i_sb; |
617ba13b | 202 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 203 | unsigned int flags; |
ac27a0ec | 204 | |
af5bc92d | 205 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
206 | |
207 | switch (cmd) { | |
617ba13b | 208 | case EXT4_IOC_GETFLAGS: |
ff9ddf7e | 209 | ext4_get_inode_flags(ei); |
617ba13b | 210 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
ac27a0ec | 211 | return put_user(flags, (int __user *) arg); |
617ba13b | 212 | case EXT4_IOC_SETFLAGS: { |
ac27a0ec | 213 | handle_t *handle = NULL; |
4db46fc2 | 214 | int err, migrate = 0; |
617ba13b | 215 | struct ext4_iloc iloc; |
79906964 | 216 | unsigned int oldflags, mask, i; |
ac27a0ec DK |
217 | unsigned int jflag; |
218 | ||
2e149670 | 219 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
220 | return -EACCES; |
221 | ||
222 | if (get_user(flags, (int __user *) arg)) | |
223 | return -EFAULT; | |
224 | ||
a561be71 | 225 | err = mnt_want_write_file(filp); |
42a74f20 DH |
226 | if (err) |
227 | return err; | |
228 | ||
2dc6b0d4 | 229 | flags = ext4_mask_flags(inode->i_mode, flags); |
ac27a0ec | 230 | |
42a74f20 | 231 | err = -EPERM; |
ac27a0ec | 232 | mutex_lock(&inode->i_mutex); |
e47776a0 | 233 | /* Is it quota file? Do not allow user to mess with it */ |
42a74f20 DH |
234 | if (IS_NOQUOTA(inode)) |
235 | goto flags_out; | |
236 | ||
ac27a0ec DK |
237 | oldflags = ei->i_flags; |
238 | ||
239 | /* The JOURNAL_DATA flag is modifiable only by root */ | |
617ba13b | 240 | jflag = flags & EXT4_JOURNAL_DATA_FL; |
ac27a0ec DK |
241 | |
242 | /* | |
243 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
244 | * the relevant capability. | |
245 | * | |
246 | * This test looks nicer. Thanks to Pauline Middelink | |
247 | */ | |
617ba13b | 248 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { |
42a74f20 DH |
249 | if (!capable(CAP_LINUX_IMMUTABLE)) |
250 | goto flags_out; | |
ac27a0ec DK |
251 | } |
252 | ||
253 | /* | |
254 | * The JOURNAL_DATA flag can only be changed by | |
255 | * the relevant capability. | |
256 | */ | |
617ba13b | 257 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { |
42a74f20 DH |
258 | if (!capable(CAP_SYS_RESOURCE)) |
259 | goto flags_out; | |
ac27a0ec | 260 | } |
996bb9fd | 261 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) |
4db46fc2 | 262 | migrate = 1; |
ac27a0ec | 263 | |
c8d46e41 JZ |
264 | if (flags & EXT4_EOFBLOCKS_FL) { |
265 | /* we don't support adding EOFBLOCKS flag */ | |
266 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { | |
267 | err = -EOPNOTSUPP; | |
268 | goto flags_out; | |
269 | } | |
270 | } else if (oldflags & EXT4_EOFBLOCKS_FL) | |
271 | ext4_truncate(inode); | |
272 | ||
9924a92a | 273 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
ac27a0ec | 274 | if (IS_ERR(handle)) { |
42a74f20 DH |
275 | err = PTR_ERR(handle); |
276 | goto flags_out; | |
ac27a0ec DK |
277 | } |
278 | if (IS_SYNC(inode)) | |
0390131b | 279 | ext4_handle_sync(handle); |
617ba13b | 280 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec DK |
281 | if (err) |
282 | goto flags_err; | |
283 | ||
79906964 TT |
284 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { |
285 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
286 | continue; | |
287 | if (mask & flags) | |
288 | ext4_set_inode_flag(inode, i); | |
289 | else | |
290 | ext4_clear_inode_flag(inode, i); | |
291 | } | |
ac27a0ec | 292 | |
617ba13b | 293 | ext4_set_inode_flags(inode); |
ef7f3835 | 294 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 295 | |
617ba13b | 296 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 297 | flags_err: |
617ba13b | 298 | ext4_journal_stop(handle); |
42a74f20 DH |
299 | if (err) |
300 | goto flags_out; | |
ac27a0ec | 301 | |
617ba13b MC |
302 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) |
303 | err = ext4_change_inode_journal_flag(inode, jflag); | |
4db46fc2 AK |
304 | if (err) |
305 | goto flags_out; | |
996bb9fd TT |
306 | if (migrate) { |
307 | if (flags & EXT4_EXTENTS_FL) | |
308 | err = ext4_ext_migrate(inode); | |
309 | else | |
310 | err = ext4_ind_migrate(inode); | |
311 | } | |
312 | ||
42a74f20 | 313 | flags_out: |
ac27a0ec | 314 | mutex_unlock(&inode->i_mutex); |
2a79f17e | 315 | mnt_drop_write_file(filp); |
ac27a0ec DK |
316 | return err; |
317 | } | |
617ba13b MC |
318 | case EXT4_IOC_GETVERSION: |
319 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 320 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
321 | case EXT4_IOC_SETVERSION: |
322 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 323 | handle_t *handle; |
617ba13b | 324 | struct ext4_iloc iloc; |
ac27a0ec DK |
325 | __u32 generation; |
326 | int err; | |
327 | ||
2e149670 | 328 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 329 | return -EPERM; |
42a74f20 | 330 | |
9aa5d32b | 331 | if (ext4_has_metadata_csum(inode->i_sb)) { |
814525f4 DW |
332 | ext4_warning(sb, "Setting inode version is not " |
333 | "supported with metadata_csum enabled."); | |
334 | return -ENOTTY; | |
335 | } | |
336 | ||
a561be71 | 337 | err = mnt_want_write_file(filp); |
42a74f20 DH |
338 | if (err) |
339 | return err; | |
340 | if (get_user(generation, (int __user *) arg)) { | |
341 | err = -EFAULT; | |
342 | goto setversion_out; | |
343 | } | |
ac27a0ec | 344 | |
6c2155b9 | 345 | mutex_lock(&inode->i_mutex); |
9924a92a | 346 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
347 | if (IS_ERR(handle)) { |
348 | err = PTR_ERR(handle); | |
6c2155b9 | 349 | goto unlock_out; |
42a74f20 | 350 | } |
617ba13b | 351 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 352 | if (err == 0) { |
ef7f3835 | 353 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 354 | inode->i_generation = generation; |
617ba13b | 355 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 356 | } |
617ba13b | 357 | ext4_journal_stop(handle); |
6c2155b9 DH |
358 | |
359 | unlock_out: | |
360 | mutex_unlock(&inode->i_mutex); | |
42a74f20 | 361 | setversion_out: |
2a79f17e | 362 | mnt_drop_write_file(filp); |
ac27a0ec DK |
363 | return err; |
364 | } | |
617ba13b MC |
365 | case EXT4_IOC_GROUP_EXTEND: { |
366 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 367 | int err, err2=0; |
ac27a0ec | 368 | |
8f82f840 YY |
369 | err = ext4_resize_begin(sb); |
370 | if (err) | |
371 | return err; | |
ac27a0ec | 372 | |
014a1770 DH |
373 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
374 | err = -EFAULT; | |
375 | goto group_extend_out; | |
376 | } | |
ac27a0ec | 377 | |
bab08ab9 TT |
378 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
379 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
380 | ext4_msg(sb, KERN_ERR, | |
381 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
382 | err = -EOPNOTSUPP; |
383 | goto group_extend_out; | |
bab08ab9 TT |
384 | } |
385 | ||
a561be71 | 386 | err = mnt_want_write_file(filp); |
42a74f20 | 387 | if (err) |
014a1770 | 388 | goto group_extend_out; |
42a74f20 | 389 | |
617ba13b | 390 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
391 | if (EXT4_SB(sb)->s_journal) { |
392 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
393 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
394 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
395 | } | |
7ffe1ea8 HK |
396 | if (err == 0) |
397 | err = err2; | |
2a79f17e | 398 | mnt_drop_write_file(filp); |
014a1770 | 399 | group_extend_out: |
8f82f840 | 400 | ext4_resize_end(sb); |
ac27a0ec DK |
401 | return err; |
402 | } | |
748de673 AF |
403 | |
404 | case EXT4_IOC_MOVE_EXT: { | |
405 | struct move_extent me; | |
2903ff01 AV |
406 | struct fd donor; |
407 | int err; | |
748de673 | 408 | |
4a58579b AF |
409 | if (!(filp->f_mode & FMODE_READ) || |
410 | !(filp->f_mode & FMODE_WRITE)) | |
411 | return -EBADF; | |
412 | ||
748de673 AF |
413 | if (copy_from_user(&me, |
414 | (struct move_extent __user *)arg, sizeof(me))) | |
415 | return -EFAULT; | |
4a58579b | 416 | me.moved_len = 0; |
748de673 | 417 | |
2903ff01 AV |
418 | donor = fdget(me.donor_fd); |
419 | if (!donor.file) | |
748de673 AF |
420 | return -EBADF; |
421 | ||
2903ff01 | 422 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
423 | err = -EBADF; |
424 | goto mext_out; | |
748de673 AF |
425 | } |
426 | ||
bab08ab9 TT |
427 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
428 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
429 | ext4_msg(sb, KERN_ERR, | |
430 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
431 | err = -EOPNOTSUPP; |
432 | goto mext_out; | |
bab08ab9 TT |
433 | } |
434 | ||
a561be71 | 435 | err = mnt_want_write_file(filp); |
4a58579b AF |
436 | if (err) |
437 | goto mext_out; | |
438 | ||
2903ff01 | 439 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 440 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 441 | mnt_drop_write_file(filp); |
748de673 | 442 | |
60e6679e | 443 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 444 | &me, sizeof(me))) |
4a58579b AF |
445 | err = -EFAULT; |
446 | mext_out: | |
2903ff01 | 447 | fdput(donor); |
748de673 AF |
448 | return err; |
449 | } | |
450 | ||
617ba13b MC |
451 | case EXT4_IOC_GROUP_ADD: { |
452 | struct ext4_new_group_data input; | |
ac046f1d | 453 | int err, err2=0; |
ac27a0ec | 454 | |
8f82f840 YY |
455 | err = ext4_resize_begin(sb); |
456 | if (err) | |
457 | return err; | |
ac27a0ec | 458 | |
617ba13b | 459 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
014a1770 DH |
460 | sizeof(input))) { |
461 | err = -EFAULT; | |
462 | goto group_add_out; | |
463 | } | |
ac27a0ec | 464 | |
bab08ab9 TT |
465 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
466 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
467 | ext4_msg(sb, KERN_ERR, | |
468 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
469 | err = -EOPNOTSUPP; |
470 | goto group_add_out; | |
bab08ab9 TT |
471 | } |
472 | ||
a561be71 | 473 | err = mnt_want_write_file(filp); |
42a74f20 | 474 | if (err) |
014a1770 | 475 | goto group_add_out; |
42a74f20 | 476 | |
617ba13b | 477 | err = ext4_group_add(sb, &input); |
ac046f1d PT |
478 | if (EXT4_SB(sb)->s_journal) { |
479 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
480 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
481 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
482 | } | |
7ffe1ea8 HK |
483 | if (err == 0) |
484 | err = err2; | |
2a79f17e | 485 | mnt_drop_write_file(filp); |
7f511862 TT |
486 | if (!err && ext4_has_group_desc_csum(sb) && |
487 | test_opt(sb, INIT_INODE_TABLE)) | |
488 | err = ext4_register_li_request(sb, input.group); | |
014a1770 | 489 | group_add_out: |
8f82f840 | 490 | ext4_resize_end(sb); |
ac27a0ec DK |
491 | return err; |
492 | } | |
493 | ||
c14c6fd5 | 494 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
495 | { |
496 | int err; | |
2e149670 | 497 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
498 | return -EACCES; |
499 | ||
a561be71 | 500 | err = mnt_want_write_file(filp); |
2a43a878 AK |
501 | if (err) |
502 | return err; | |
503 | /* | |
504 | * inode_mutex prevent write and truncate on the file. | |
505 | * Read still goes through. We take i_data_sem in | |
506 | * ext4_ext_swap_inode_data before we switch the | |
507 | * inode format to prevent read. | |
508 | */ | |
509 | mutex_lock(&(inode->i_mutex)); | |
510 | err = ext4_ext_migrate(inode); | |
511 | mutex_unlock(&(inode->i_mutex)); | |
2a79f17e | 512 | mnt_drop_write_file(filp); |
2a43a878 AK |
513 | return err; |
514 | } | |
c14c6fd5 | 515 | |
ccd2506b TT |
516 | case EXT4_IOC_ALLOC_DA_BLKS: |
517 | { | |
518 | int err; | |
2e149670 | 519 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
520 | return -EACCES; |
521 | ||
a561be71 | 522 | err = mnt_want_write_file(filp); |
ccd2506b TT |
523 | if (err) |
524 | return err; | |
525 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 526 | mnt_drop_write_file(filp); |
ccd2506b TT |
527 | return err; |
528 | } | |
529 | ||
393d1d1d | 530 | case EXT4_IOC_SWAP_BOOT: |
3e67cfad DM |
531 | { |
532 | int err; | |
393d1d1d DTB |
533 | if (!(filp->f_mode & FMODE_WRITE)) |
534 | return -EBADF; | |
3e67cfad DM |
535 | err = mnt_want_write_file(filp); |
536 | if (err) | |
537 | return err; | |
538 | err = swap_inode_boot_loader(sb, inode); | |
539 | mnt_drop_write_file(filp); | |
540 | return err; | |
541 | } | |
393d1d1d | 542 | |
19c5246d YY |
543 | case EXT4_IOC_RESIZE_FS: { |
544 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 545 | int err = 0, err2 = 0; |
7f511862 | 546 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d YY |
547 | |
548 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
549 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
550 | ext4_msg(sb, KERN_ERR, | |
551 | "Online resizing not (yet) supported with bigalloc"); | |
552 | return -EOPNOTSUPP; | |
553 | } | |
554 | ||
19c5246d YY |
555 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
556 | sizeof(__u64))) { | |
557 | return -EFAULT; | |
558 | } | |
559 | ||
19c5246d YY |
560 | err = ext4_resize_begin(sb); |
561 | if (err) | |
562 | return err; | |
563 | ||
8cae6f71 | 564 | err = mnt_want_write_file(filp); |
19c5246d YY |
565 | if (err) |
566 | goto resizefs_out; | |
567 | ||
568 | err = ext4_resize_fs(sb, n_blocks_count); | |
569 | if (EXT4_SB(sb)->s_journal) { | |
570 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
571 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
572 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
573 | } | |
574 | if (err == 0) | |
575 | err = err2; | |
8cae6f71 | 576 | mnt_drop_write_file(filp); |
7f511862 TT |
577 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
578 | ext4_has_group_desc_csum(sb) && | |
579 | test_opt(sb, INIT_INODE_TABLE)) | |
580 | err = ext4_register_li_request(sb, o_group); | |
581 | ||
19c5246d YY |
582 | resizefs_out: |
583 | ext4_resize_end(sb); | |
584 | return err; | |
585 | } | |
586 | ||
e681c047 LC |
587 | case FITRIM: |
588 | { | |
41431792 | 589 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
e681c047 LC |
590 | struct fstrim_range range; |
591 | int ret = 0; | |
592 | ||
593 | if (!capable(CAP_SYS_ADMIN)) | |
594 | return -EPERM; | |
595 | ||
41431792 LC |
596 | if (!blk_queue_discard(q)) |
597 | return -EOPNOTSUPP; | |
598 | ||
e6705f7c | 599 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
600 | sizeof(range))) |
601 | return -EFAULT; | |
602 | ||
5c2ed62f LC |
603 | range.minlen = max((unsigned int)range.minlen, |
604 | q->limits.discard_granularity); | |
e681c047 LC |
605 | ret = ext4_trim_fs(sb, &range); |
606 | if (ret < 0) | |
607 | return ret; | |
608 | ||
e6705f7c | 609 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
610 | sizeof(range))) |
611 | return -EFAULT; | |
612 | ||
613 | return 0; | |
614 | } | |
7869a4a6 TT |
615 | case EXT4_IOC_PRECACHE_EXTENTS: |
616 | return ext4_ext_precache(inode); | |
e681c047 | 617 | |
ac27a0ec DK |
618 | default: |
619 | return -ENOTTY; | |
620 | } | |
621 | } | |
622 | ||
623 | #ifdef CONFIG_COMPAT | |
617ba13b | 624 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 625 | { |
ac27a0ec DK |
626 | /* These are just misnamed, they actually get/put from/to user an int */ |
627 | switch (cmd) { | |
617ba13b MC |
628 | case EXT4_IOC32_GETFLAGS: |
629 | cmd = EXT4_IOC_GETFLAGS; | |
ac27a0ec | 630 | break; |
617ba13b MC |
631 | case EXT4_IOC32_SETFLAGS: |
632 | cmd = EXT4_IOC_SETFLAGS; | |
ac27a0ec | 633 | break; |
617ba13b MC |
634 | case EXT4_IOC32_GETVERSION: |
635 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 636 | break; |
617ba13b MC |
637 | case EXT4_IOC32_SETVERSION: |
638 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 639 | break; |
617ba13b MC |
640 | case EXT4_IOC32_GROUP_EXTEND: |
641 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 642 | break; |
617ba13b MC |
643 | case EXT4_IOC32_GETVERSION_OLD: |
644 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 645 | break; |
617ba13b MC |
646 | case EXT4_IOC32_SETVERSION_OLD: |
647 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 648 | break; |
617ba13b MC |
649 | case EXT4_IOC32_GETRSVSZ: |
650 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 651 | break; |
617ba13b MC |
652 | case EXT4_IOC32_SETRSVSZ: |
653 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 654 | break; |
4d92dc0f BH |
655 | case EXT4_IOC32_GROUP_ADD: { |
656 | struct compat_ext4_new_group_input __user *uinput; | |
657 | struct ext4_new_group_input input; | |
658 | mm_segment_t old_fs; | |
659 | int err; | |
660 | ||
661 | uinput = compat_ptr(arg); | |
662 | err = get_user(input.group, &uinput->group); | |
663 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
664 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
665 | err |= get_user(input.inode_table, &uinput->inode_table); | |
666 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
667 | err |= get_user(input.reserved_blocks, | |
668 | &uinput->reserved_blocks); | |
669 | if (err) | |
670 | return -EFAULT; | |
671 | old_fs = get_fs(); | |
672 | set_fs(KERNEL_DS); | |
673 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, | |
674 | (unsigned long) &input); | |
675 | set_fs(old_fs); | |
676 | return err; | |
677 | } | |
b684b2ee | 678 | case EXT4_IOC_MOVE_EXT: |
a56e69c2 | 679 | case FITRIM: |
19c5246d | 680 | case EXT4_IOC_RESIZE_FS: |
7869a4a6 | 681 | case EXT4_IOC_PRECACHE_EXTENTS: |
b684b2ee | 682 | break; |
ac27a0ec DK |
683 | default: |
684 | return -ENOIOCTLCMD; | |
685 | } | |
5cdd7b2d | 686 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
687 | } |
688 | #endif |