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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> | |
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; | |
30d29b11 | 143 | goto journal_err_out; |
393d1d1d DTB |
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 | ||
30d29b11 | 201 | journal_err_out: |
393d1d1d DTB |
202 | ext4_inode_resume_unlocked_dio(inode); |
203 | ext4_inode_resume_unlocked_dio(inode_bl); | |
204 | ||
375e289e | 205 | unlock_two_nondirectories(inode, inode_bl); |
393d1d1d DTB |
206 | |
207 | iput(inode_bl); | |
208 | ||
209 | swap_boot_out: | |
210 | return err; | |
211 | } | |
212 | ||
5cdd7b2d | 213 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 214 | { |
496ad9aa | 215 | struct inode *inode = file_inode(filp); |
bab08ab9 | 216 | struct super_block *sb = inode->i_sb; |
617ba13b | 217 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 218 | unsigned int flags; |
ac27a0ec | 219 | |
af5bc92d | 220 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
221 | |
222 | switch (cmd) { | |
617ba13b | 223 | case EXT4_IOC_GETFLAGS: |
ff9ddf7e | 224 | ext4_get_inode_flags(ei); |
617ba13b | 225 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
ac27a0ec | 226 | return put_user(flags, (int __user *) arg); |
617ba13b | 227 | case EXT4_IOC_SETFLAGS: { |
ac27a0ec | 228 | handle_t *handle = NULL; |
4db46fc2 | 229 | int err, migrate = 0; |
617ba13b | 230 | struct ext4_iloc iloc; |
79906964 | 231 | unsigned int oldflags, mask, i; |
ac27a0ec DK |
232 | unsigned int jflag; |
233 | ||
2e149670 | 234 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
235 | return -EACCES; |
236 | ||
237 | if (get_user(flags, (int __user *) arg)) | |
238 | return -EFAULT; | |
239 | ||
a561be71 | 240 | err = mnt_want_write_file(filp); |
42a74f20 DH |
241 | if (err) |
242 | return err; | |
243 | ||
2dc6b0d4 | 244 | flags = ext4_mask_flags(inode->i_mode, flags); |
ac27a0ec | 245 | |
42a74f20 | 246 | err = -EPERM; |
ac27a0ec | 247 | mutex_lock(&inode->i_mutex); |
e47776a0 | 248 | /* Is it quota file? Do not allow user to mess with it */ |
42a74f20 DH |
249 | if (IS_NOQUOTA(inode)) |
250 | goto flags_out; | |
251 | ||
ac27a0ec DK |
252 | oldflags = ei->i_flags; |
253 | ||
254 | /* The JOURNAL_DATA flag is modifiable only by root */ | |
617ba13b | 255 | jflag = flags & EXT4_JOURNAL_DATA_FL; |
ac27a0ec DK |
256 | |
257 | /* | |
258 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
259 | * the relevant capability. | |
260 | * | |
261 | * This test looks nicer. Thanks to Pauline Middelink | |
262 | */ | |
617ba13b | 263 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { |
42a74f20 DH |
264 | if (!capable(CAP_LINUX_IMMUTABLE)) |
265 | goto flags_out; | |
ac27a0ec DK |
266 | } |
267 | ||
268 | /* | |
269 | * The JOURNAL_DATA flag can only be changed by | |
270 | * the relevant capability. | |
271 | */ | |
617ba13b | 272 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { |
42a74f20 DH |
273 | if (!capable(CAP_SYS_RESOURCE)) |
274 | goto flags_out; | |
ac27a0ec | 275 | } |
996bb9fd | 276 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) |
4db46fc2 | 277 | migrate = 1; |
ac27a0ec | 278 | |
c8d46e41 JZ |
279 | if (flags & EXT4_EOFBLOCKS_FL) { |
280 | /* we don't support adding EOFBLOCKS flag */ | |
281 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { | |
282 | err = -EOPNOTSUPP; | |
283 | goto flags_out; | |
284 | } | |
285 | } else if (oldflags & EXT4_EOFBLOCKS_FL) | |
286 | ext4_truncate(inode); | |
287 | ||
9924a92a | 288 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
ac27a0ec | 289 | if (IS_ERR(handle)) { |
42a74f20 DH |
290 | err = PTR_ERR(handle); |
291 | goto flags_out; | |
ac27a0ec DK |
292 | } |
293 | if (IS_SYNC(inode)) | |
0390131b | 294 | ext4_handle_sync(handle); |
617ba13b | 295 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec DK |
296 | if (err) |
297 | goto flags_err; | |
298 | ||
79906964 TT |
299 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { |
300 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
301 | continue; | |
302 | if (mask & flags) | |
303 | ext4_set_inode_flag(inode, i); | |
304 | else | |
305 | ext4_clear_inode_flag(inode, i); | |
306 | } | |
ac27a0ec | 307 | |
617ba13b | 308 | ext4_set_inode_flags(inode); |
ef7f3835 | 309 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 310 | |
617ba13b | 311 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 312 | flags_err: |
617ba13b | 313 | ext4_journal_stop(handle); |
42a74f20 DH |
314 | if (err) |
315 | goto flags_out; | |
ac27a0ec | 316 | |
617ba13b MC |
317 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) |
318 | err = ext4_change_inode_journal_flag(inode, jflag); | |
4db46fc2 AK |
319 | if (err) |
320 | goto flags_out; | |
996bb9fd TT |
321 | if (migrate) { |
322 | if (flags & EXT4_EXTENTS_FL) | |
323 | err = ext4_ext_migrate(inode); | |
324 | else | |
325 | err = ext4_ind_migrate(inode); | |
326 | } | |
327 | ||
42a74f20 | 328 | flags_out: |
ac27a0ec | 329 | mutex_unlock(&inode->i_mutex); |
2a79f17e | 330 | mnt_drop_write_file(filp); |
ac27a0ec DK |
331 | return err; |
332 | } | |
617ba13b MC |
333 | case EXT4_IOC_GETVERSION: |
334 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 335 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
336 | case EXT4_IOC_SETVERSION: |
337 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 338 | handle_t *handle; |
617ba13b | 339 | struct ext4_iloc iloc; |
ac27a0ec DK |
340 | __u32 generation; |
341 | int err; | |
342 | ||
2e149670 | 343 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 344 | return -EPERM; |
42a74f20 | 345 | |
814525f4 DW |
346 | if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, |
347 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { | |
348 | ext4_warning(sb, "Setting inode version is not " | |
349 | "supported with metadata_csum enabled."); | |
350 | return -ENOTTY; | |
351 | } | |
352 | ||
a561be71 | 353 | err = mnt_want_write_file(filp); |
42a74f20 DH |
354 | if (err) |
355 | return err; | |
356 | if (get_user(generation, (int __user *) arg)) { | |
357 | err = -EFAULT; | |
358 | goto setversion_out; | |
359 | } | |
ac27a0ec | 360 | |
6c2155b9 | 361 | mutex_lock(&inode->i_mutex); |
9924a92a | 362 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
363 | if (IS_ERR(handle)) { |
364 | err = PTR_ERR(handle); | |
6c2155b9 | 365 | goto unlock_out; |
42a74f20 | 366 | } |
617ba13b | 367 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 368 | if (err == 0) { |
ef7f3835 | 369 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 370 | inode->i_generation = generation; |
617ba13b | 371 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 372 | } |
617ba13b | 373 | ext4_journal_stop(handle); |
6c2155b9 DH |
374 | |
375 | unlock_out: | |
376 | mutex_unlock(&inode->i_mutex); | |
42a74f20 | 377 | setversion_out: |
2a79f17e | 378 | mnt_drop_write_file(filp); |
ac27a0ec DK |
379 | return err; |
380 | } | |
617ba13b MC |
381 | case EXT4_IOC_GROUP_EXTEND: { |
382 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 383 | int err, err2=0; |
ac27a0ec | 384 | |
8f82f840 YY |
385 | err = ext4_resize_begin(sb); |
386 | if (err) | |
387 | return err; | |
ac27a0ec | 388 | |
014a1770 DH |
389 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
390 | err = -EFAULT; | |
391 | goto group_extend_out; | |
392 | } | |
ac27a0ec | 393 | |
bab08ab9 TT |
394 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
395 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
396 | ext4_msg(sb, KERN_ERR, | |
397 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
398 | err = -EOPNOTSUPP; |
399 | goto group_extend_out; | |
bab08ab9 TT |
400 | } |
401 | ||
a561be71 | 402 | err = mnt_want_write_file(filp); |
42a74f20 | 403 | if (err) |
014a1770 | 404 | goto group_extend_out; |
42a74f20 | 405 | |
617ba13b | 406 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
407 | if (EXT4_SB(sb)->s_journal) { |
408 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
409 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
410 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
411 | } | |
7ffe1ea8 HK |
412 | if (err == 0) |
413 | err = err2; | |
2a79f17e | 414 | mnt_drop_write_file(filp); |
014a1770 | 415 | group_extend_out: |
8f82f840 | 416 | ext4_resize_end(sb); |
ac27a0ec DK |
417 | return err; |
418 | } | |
748de673 AF |
419 | |
420 | case EXT4_IOC_MOVE_EXT: { | |
421 | struct move_extent me; | |
2903ff01 AV |
422 | struct fd donor; |
423 | int err; | |
748de673 | 424 | |
4a58579b AF |
425 | if (!(filp->f_mode & FMODE_READ) || |
426 | !(filp->f_mode & FMODE_WRITE)) | |
427 | return -EBADF; | |
428 | ||
748de673 AF |
429 | if (copy_from_user(&me, |
430 | (struct move_extent __user *)arg, sizeof(me))) | |
431 | return -EFAULT; | |
4a58579b | 432 | me.moved_len = 0; |
748de673 | 433 | |
2903ff01 AV |
434 | donor = fdget(me.donor_fd); |
435 | if (!donor.file) | |
748de673 AF |
436 | return -EBADF; |
437 | ||
2903ff01 | 438 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
439 | err = -EBADF; |
440 | goto mext_out; | |
748de673 AF |
441 | } |
442 | ||
bab08ab9 TT |
443 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
444 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
445 | ext4_msg(sb, KERN_ERR, | |
446 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
447 | err = -EOPNOTSUPP; |
448 | goto mext_out; | |
bab08ab9 TT |
449 | } |
450 | ||
a561be71 | 451 | err = mnt_want_write_file(filp); |
4a58579b AF |
452 | if (err) |
453 | goto mext_out; | |
454 | ||
2903ff01 | 455 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 456 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 457 | mnt_drop_write_file(filp); |
748de673 | 458 | |
60e6679e | 459 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 460 | &me, sizeof(me))) |
4a58579b AF |
461 | err = -EFAULT; |
462 | mext_out: | |
2903ff01 | 463 | fdput(donor); |
748de673 AF |
464 | return err; |
465 | } | |
466 | ||
617ba13b MC |
467 | case EXT4_IOC_GROUP_ADD: { |
468 | struct ext4_new_group_data input; | |
ac046f1d | 469 | int err, err2=0; |
ac27a0ec | 470 | |
8f82f840 YY |
471 | err = ext4_resize_begin(sb); |
472 | if (err) | |
473 | return err; | |
ac27a0ec | 474 | |
617ba13b | 475 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
014a1770 DH |
476 | sizeof(input))) { |
477 | err = -EFAULT; | |
478 | goto group_add_out; | |
479 | } | |
ac27a0ec | 480 | |
bab08ab9 TT |
481 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
482 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
483 | ext4_msg(sb, KERN_ERR, | |
484 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
485 | err = -EOPNOTSUPP; |
486 | goto group_add_out; | |
bab08ab9 TT |
487 | } |
488 | ||
a561be71 | 489 | err = mnt_want_write_file(filp); |
42a74f20 | 490 | if (err) |
014a1770 | 491 | goto group_add_out; |
42a74f20 | 492 | |
617ba13b | 493 | err = ext4_group_add(sb, &input); |
ac046f1d PT |
494 | if (EXT4_SB(sb)->s_journal) { |
495 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
496 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
497 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
498 | } | |
7ffe1ea8 HK |
499 | if (err == 0) |
500 | err = err2; | |
2a79f17e | 501 | mnt_drop_write_file(filp); |
7f511862 TT |
502 | if (!err && ext4_has_group_desc_csum(sb) && |
503 | test_opt(sb, INIT_INODE_TABLE)) | |
504 | err = ext4_register_li_request(sb, input.group); | |
014a1770 | 505 | group_add_out: |
8f82f840 | 506 | ext4_resize_end(sb); |
ac27a0ec DK |
507 | return err; |
508 | } | |
509 | ||
c14c6fd5 | 510 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
511 | { |
512 | int err; | |
2e149670 | 513 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
514 | return -EACCES; |
515 | ||
a561be71 | 516 | err = mnt_want_write_file(filp); |
2a43a878 AK |
517 | if (err) |
518 | return err; | |
519 | /* | |
520 | * inode_mutex prevent write and truncate on the file. | |
521 | * Read still goes through. We take i_data_sem in | |
522 | * ext4_ext_swap_inode_data before we switch the | |
523 | * inode format to prevent read. | |
524 | */ | |
525 | mutex_lock(&(inode->i_mutex)); | |
526 | err = ext4_ext_migrate(inode); | |
527 | mutex_unlock(&(inode->i_mutex)); | |
2a79f17e | 528 | mnt_drop_write_file(filp); |
2a43a878 AK |
529 | return err; |
530 | } | |
c14c6fd5 | 531 | |
ccd2506b TT |
532 | case EXT4_IOC_ALLOC_DA_BLKS: |
533 | { | |
534 | int err; | |
2e149670 | 535 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
536 | return -EACCES; |
537 | ||
a561be71 | 538 | err = mnt_want_write_file(filp); |
ccd2506b TT |
539 | if (err) |
540 | return err; | |
541 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 542 | mnt_drop_write_file(filp); |
ccd2506b TT |
543 | return err; |
544 | } | |
545 | ||
393d1d1d DTB |
546 | case EXT4_IOC_SWAP_BOOT: |
547 | if (!(filp->f_mode & FMODE_WRITE)) | |
548 | return -EBADF; | |
549 | return swap_inode_boot_loader(sb, inode); | |
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); | |
e681c047 | 625 | |
ac27a0ec DK |
626 | default: |
627 | return -ENOTTY; | |
628 | } | |
629 | } | |
630 | ||
631 | #ifdef CONFIG_COMPAT | |
617ba13b | 632 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 633 | { |
ac27a0ec DK |
634 | /* These are just misnamed, they actually get/put from/to user an int */ |
635 | switch (cmd) { | |
617ba13b MC |
636 | case EXT4_IOC32_GETFLAGS: |
637 | cmd = EXT4_IOC_GETFLAGS; | |
ac27a0ec | 638 | break; |
617ba13b MC |
639 | case EXT4_IOC32_SETFLAGS: |
640 | cmd = EXT4_IOC_SETFLAGS; | |
ac27a0ec | 641 | break; |
617ba13b MC |
642 | case EXT4_IOC32_GETVERSION: |
643 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 644 | break; |
617ba13b MC |
645 | case EXT4_IOC32_SETVERSION: |
646 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 647 | break; |
617ba13b MC |
648 | case EXT4_IOC32_GROUP_EXTEND: |
649 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 650 | break; |
617ba13b MC |
651 | case EXT4_IOC32_GETVERSION_OLD: |
652 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 653 | break; |
617ba13b MC |
654 | case EXT4_IOC32_SETVERSION_OLD: |
655 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 656 | break; |
617ba13b MC |
657 | case EXT4_IOC32_GETRSVSZ: |
658 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 659 | break; |
617ba13b MC |
660 | case EXT4_IOC32_SETRSVSZ: |
661 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 662 | break; |
4d92dc0f BH |
663 | case EXT4_IOC32_GROUP_ADD: { |
664 | struct compat_ext4_new_group_input __user *uinput; | |
665 | struct ext4_new_group_input input; | |
666 | mm_segment_t old_fs; | |
667 | int err; | |
668 | ||
669 | uinput = compat_ptr(arg); | |
670 | err = get_user(input.group, &uinput->group); | |
671 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
672 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
673 | err |= get_user(input.inode_table, &uinput->inode_table); | |
674 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
675 | err |= get_user(input.reserved_blocks, | |
676 | &uinput->reserved_blocks); | |
677 | if (err) | |
678 | return -EFAULT; | |
679 | old_fs = get_fs(); | |
680 | set_fs(KERNEL_DS); | |
681 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, | |
682 | (unsigned long) &input); | |
683 | set_fs(old_fs); | |
684 | return err; | |
685 | } | |
b684b2ee | 686 | case EXT4_IOC_MOVE_EXT: |
a56e69c2 | 687 | case FITRIM: |
19c5246d | 688 | case EXT4_IOC_RESIZE_FS: |
7869a4a6 | 689 | case EXT4_IOC_PRECACHE_EXTENTS: |
b684b2ee | 690 | break; |
ac27a0ec DK |
691 | default: |
692 | return -ENOIOCTLCMD; | |
693 | } | |
5cdd7b2d | 694 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
695 | } |
696 | #endif |