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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 | 106 | |
d8558a29 TT |
107 | if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) |
108 | return -EINVAL; | |
393d1d1d | 109 | |
d8558a29 TT |
110 | if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) |
111 | return -EPERM; | |
393d1d1d | 112 | |
393d1d1d | 113 | inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); |
d8558a29 TT |
114 | if (IS_ERR(inode_bl)) |
115 | return PTR_ERR(inode_bl); | |
393d1d1d DTB |
116 | ei_bl = EXT4_I(inode_bl); |
117 | ||
118 | filemap_flush(inode->i_mapping); | |
119 | filemap_flush(inode_bl->i_mapping); | |
120 | ||
121 | /* Protect orig inodes against a truncate and make sure, | |
122 | * that only 1 swap_inode_boot_loader is running. */ | |
375e289e | 123 | lock_two_nondirectories(inode, inode_bl); |
393d1d1d DTB |
124 | |
125 | truncate_inode_pages(&inode->i_data, 0); | |
126 | truncate_inode_pages(&inode_bl->i_data, 0); | |
127 | ||
128 | /* Wait for all existing dio workers */ | |
129 | ext4_inode_block_unlocked_dio(inode); | |
130 | ext4_inode_block_unlocked_dio(inode_bl); | |
131 | inode_dio_wait(inode); | |
132 | inode_dio_wait(inode_bl); | |
133 | ||
134 | handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); | |
135 | if (IS_ERR(handle)) { | |
136 | err = -EINVAL; | |
30d29b11 | 137 | goto journal_err_out; |
393d1d1d DTB |
138 | } |
139 | ||
140 | /* Protect extent tree against block allocations via delalloc */ | |
141 | ext4_double_down_write_data_sem(inode, inode_bl); | |
142 | ||
143 | if (inode_bl->i_nlink == 0) { | |
144 | /* this inode has never been used as a BOOT_LOADER */ | |
145 | set_nlink(inode_bl, 1); | |
146 | i_uid_write(inode_bl, 0); | |
147 | i_gid_write(inode_bl, 0); | |
148 | inode_bl->i_flags = 0; | |
149 | ei_bl->i_flags = 0; | |
150 | inode_bl->i_version = 1; | |
151 | i_size_write(inode_bl, 0); | |
152 | inode_bl->i_mode = S_IFREG; | |
153 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, | |
154 | EXT4_FEATURE_INCOMPAT_EXTENTS)) { | |
155 | ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); | |
156 | ext4_ext_tree_init(handle, inode_bl); | |
157 | } else | |
158 | memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); | |
159 | } | |
160 | ||
161 | swap_inode_data(inode, inode_bl); | |
162 | ||
163 | inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode); | |
164 | ||
165 | spin_lock(&sbi->s_next_gen_lock); | |
166 | inode->i_generation = sbi->s_next_generation++; | |
167 | inode_bl->i_generation = sbi->s_next_generation++; | |
168 | spin_unlock(&sbi->s_next_gen_lock); | |
169 | ||
170 | ext4_discard_preallocations(inode); | |
171 | ||
172 | err = ext4_mark_inode_dirty(handle, inode); | |
173 | if (err < 0) { | |
174 | ext4_warning(inode->i_sb, | |
175 | "couldn't mark inode #%lu dirty (err %d)", | |
176 | inode->i_ino, err); | |
177 | /* Revert all changes: */ | |
178 | swap_inode_data(inode, inode_bl); | |
179 | } else { | |
180 | err = ext4_mark_inode_dirty(handle, inode_bl); | |
181 | if (err < 0) { | |
182 | ext4_warning(inode_bl->i_sb, | |
183 | "couldn't mark inode #%lu dirty (err %d)", | |
184 | inode_bl->i_ino, err); | |
185 | /* Revert all changes: */ | |
186 | swap_inode_data(inode, inode_bl); | |
187 | ext4_mark_inode_dirty(handle, inode); | |
188 | } | |
189 | } | |
393d1d1d | 190 | ext4_journal_stop(handle); |
393d1d1d DTB |
191 | ext4_double_up_write_data_sem(inode, inode_bl); |
192 | ||
30d29b11 | 193 | journal_err_out: |
393d1d1d DTB |
194 | ext4_inode_resume_unlocked_dio(inode); |
195 | ext4_inode_resume_unlocked_dio(inode_bl); | |
375e289e | 196 | unlock_two_nondirectories(inode, inode_bl); |
393d1d1d | 197 | iput(inode_bl); |
393d1d1d DTB |
198 | return err; |
199 | } | |
200 | ||
5cdd7b2d | 201 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 202 | { |
496ad9aa | 203 | struct inode *inode = file_inode(filp); |
bab08ab9 | 204 | struct super_block *sb = inode->i_sb; |
617ba13b | 205 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 206 | unsigned int flags; |
ac27a0ec | 207 | |
af5bc92d | 208 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
209 | |
210 | switch (cmd) { | |
617ba13b | 211 | case EXT4_IOC_GETFLAGS: |
ff9ddf7e | 212 | ext4_get_inode_flags(ei); |
617ba13b | 213 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
ac27a0ec | 214 | return put_user(flags, (int __user *) arg); |
617ba13b | 215 | case EXT4_IOC_SETFLAGS: { |
ac27a0ec | 216 | handle_t *handle = NULL; |
4db46fc2 | 217 | int err, migrate = 0; |
617ba13b | 218 | struct ext4_iloc iloc; |
79906964 | 219 | unsigned int oldflags, mask, i; |
ac27a0ec DK |
220 | unsigned int jflag; |
221 | ||
2e149670 | 222 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
223 | return -EACCES; |
224 | ||
225 | if (get_user(flags, (int __user *) arg)) | |
226 | return -EFAULT; | |
227 | ||
a561be71 | 228 | err = mnt_want_write_file(filp); |
42a74f20 DH |
229 | if (err) |
230 | return err; | |
231 | ||
2dc6b0d4 | 232 | flags = ext4_mask_flags(inode->i_mode, flags); |
ac27a0ec | 233 | |
42a74f20 | 234 | err = -EPERM; |
ac27a0ec | 235 | mutex_lock(&inode->i_mutex); |
e47776a0 | 236 | /* Is it quota file? Do not allow user to mess with it */ |
42a74f20 DH |
237 | if (IS_NOQUOTA(inode)) |
238 | goto flags_out; | |
239 | ||
ac27a0ec DK |
240 | oldflags = ei->i_flags; |
241 | ||
242 | /* The JOURNAL_DATA flag is modifiable only by root */ | |
617ba13b | 243 | jflag = flags & EXT4_JOURNAL_DATA_FL; |
ac27a0ec DK |
244 | |
245 | /* | |
246 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
247 | * the relevant capability. | |
248 | * | |
249 | * This test looks nicer. Thanks to Pauline Middelink | |
250 | */ | |
617ba13b | 251 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { |
42a74f20 DH |
252 | if (!capable(CAP_LINUX_IMMUTABLE)) |
253 | goto flags_out; | |
ac27a0ec DK |
254 | } |
255 | ||
256 | /* | |
257 | * The JOURNAL_DATA flag can only be changed by | |
258 | * the relevant capability. | |
259 | */ | |
617ba13b | 260 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { |
42a74f20 DH |
261 | if (!capable(CAP_SYS_RESOURCE)) |
262 | goto flags_out; | |
ac27a0ec | 263 | } |
996bb9fd | 264 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) |
4db46fc2 | 265 | migrate = 1; |
ac27a0ec | 266 | |
c8d46e41 JZ |
267 | if (flags & EXT4_EOFBLOCKS_FL) { |
268 | /* we don't support adding EOFBLOCKS flag */ | |
269 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { | |
270 | err = -EOPNOTSUPP; | |
271 | goto flags_out; | |
272 | } | |
273 | } else if (oldflags & EXT4_EOFBLOCKS_FL) | |
274 | ext4_truncate(inode); | |
275 | ||
9924a92a | 276 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
ac27a0ec | 277 | if (IS_ERR(handle)) { |
42a74f20 DH |
278 | err = PTR_ERR(handle); |
279 | goto flags_out; | |
ac27a0ec DK |
280 | } |
281 | if (IS_SYNC(inode)) | |
0390131b | 282 | ext4_handle_sync(handle); |
617ba13b | 283 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec DK |
284 | if (err) |
285 | goto flags_err; | |
286 | ||
79906964 TT |
287 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { |
288 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
289 | continue; | |
290 | if (mask & flags) | |
291 | ext4_set_inode_flag(inode, i); | |
292 | else | |
293 | ext4_clear_inode_flag(inode, i); | |
294 | } | |
ac27a0ec | 295 | |
617ba13b | 296 | ext4_set_inode_flags(inode); |
ef7f3835 | 297 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 298 | |
617ba13b | 299 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 300 | flags_err: |
617ba13b | 301 | ext4_journal_stop(handle); |
42a74f20 DH |
302 | if (err) |
303 | goto flags_out; | |
ac27a0ec | 304 | |
617ba13b MC |
305 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) |
306 | err = ext4_change_inode_journal_flag(inode, jflag); | |
4db46fc2 AK |
307 | if (err) |
308 | goto flags_out; | |
996bb9fd TT |
309 | if (migrate) { |
310 | if (flags & EXT4_EXTENTS_FL) | |
311 | err = ext4_ext_migrate(inode); | |
312 | else | |
313 | err = ext4_ind_migrate(inode); | |
314 | } | |
315 | ||
42a74f20 | 316 | flags_out: |
ac27a0ec | 317 | mutex_unlock(&inode->i_mutex); |
2a79f17e | 318 | mnt_drop_write_file(filp); |
ac27a0ec DK |
319 | return err; |
320 | } | |
617ba13b MC |
321 | case EXT4_IOC_GETVERSION: |
322 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 323 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
324 | case EXT4_IOC_SETVERSION: |
325 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 326 | handle_t *handle; |
617ba13b | 327 | struct ext4_iloc iloc; |
ac27a0ec DK |
328 | __u32 generation; |
329 | int err; | |
330 | ||
2e149670 | 331 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 332 | return -EPERM; |
42a74f20 | 333 | |
814525f4 DW |
334 | if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, |
335 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { | |
336 | ext4_warning(sb, "Setting inode version is not " | |
337 | "supported with metadata_csum enabled."); | |
338 | return -ENOTTY; | |
339 | } | |
340 | ||
a561be71 | 341 | err = mnt_want_write_file(filp); |
42a74f20 DH |
342 | if (err) |
343 | return err; | |
344 | if (get_user(generation, (int __user *) arg)) { | |
345 | err = -EFAULT; | |
346 | goto setversion_out; | |
347 | } | |
ac27a0ec | 348 | |
6c2155b9 | 349 | mutex_lock(&inode->i_mutex); |
9924a92a | 350 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
351 | if (IS_ERR(handle)) { |
352 | err = PTR_ERR(handle); | |
6c2155b9 | 353 | goto unlock_out; |
42a74f20 | 354 | } |
617ba13b | 355 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 356 | if (err == 0) { |
ef7f3835 | 357 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 358 | inode->i_generation = generation; |
617ba13b | 359 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 360 | } |
617ba13b | 361 | ext4_journal_stop(handle); |
6c2155b9 DH |
362 | |
363 | unlock_out: | |
364 | mutex_unlock(&inode->i_mutex); | |
42a74f20 | 365 | setversion_out: |
2a79f17e | 366 | mnt_drop_write_file(filp); |
ac27a0ec DK |
367 | return err; |
368 | } | |
617ba13b MC |
369 | case EXT4_IOC_GROUP_EXTEND: { |
370 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 371 | int err, err2=0; |
ac27a0ec | 372 | |
8f82f840 YY |
373 | err = ext4_resize_begin(sb); |
374 | if (err) | |
375 | return err; | |
ac27a0ec | 376 | |
014a1770 DH |
377 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
378 | err = -EFAULT; | |
379 | goto group_extend_out; | |
380 | } | |
ac27a0ec | 381 | |
bab08ab9 TT |
382 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
383 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
384 | ext4_msg(sb, KERN_ERR, | |
385 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
386 | err = -EOPNOTSUPP; |
387 | goto group_extend_out; | |
bab08ab9 TT |
388 | } |
389 | ||
a561be71 | 390 | err = mnt_want_write_file(filp); |
42a74f20 | 391 | if (err) |
014a1770 | 392 | goto group_extend_out; |
42a74f20 | 393 | |
617ba13b | 394 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
395 | if (EXT4_SB(sb)->s_journal) { |
396 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
397 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
398 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
399 | } | |
7ffe1ea8 HK |
400 | if (err == 0) |
401 | err = err2; | |
2a79f17e | 402 | mnt_drop_write_file(filp); |
014a1770 | 403 | group_extend_out: |
8f82f840 | 404 | ext4_resize_end(sb); |
ac27a0ec DK |
405 | return err; |
406 | } | |
748de673 AF |
407 | |
408 | case EXT4_IOC_MOVE_EXT: { | |
409 | struct move_extent me; | |
2903ff01 AV |
410 | struct fd donor; |
411 | int err; | |
748de673 | 412 | |
4a58579b AF |
413 | if (!(filp->f_mode & FMODE_READ) || |
414 | !(filp->f_mode & FMODE_WRITE)) | |
415 | return -EBADF; | |
416 | ||
748de673 AF |
417 | if (copy_from_user(&me, |
418 | (struct move_extent __user *)arg, sizeof(me))) | |
419 | return -EFAULT; | |
4a58579b | 420 | me.moved_len = 0; |
748de673 | 421 | |
2903ff01 AV |
422 | donor = fdget(me.donor_fd); |
423 | if (!donor.file) | |
748de673 AF |
424 | return -EBADF; |
425 | ||
2903ff01 | 426 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
427 | err = -EBADF; |
428 | goto mext_out; | |
748de673 AF |
429 | } |
430 | ||
bab08ab9 TT |
431 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
432 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
433 | ext4_msg(sb, KERN_ERR, | |
434 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
435 | err = -EOPNOTSUPP; |
436 | goto mext_out; | |
bab08ab9 TT |
437 | } |
438 | ||
a561be71 | 439 | err = mnt_want_write_file(filp); |
4a58579b AF |
440 | if (err) |
441 | goto mext_out; | |
442 | ||
2903ff01 | 443 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 444 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 445 | mnt_drop_write_file(filp); |
748de673 | 446 | |
60e6679e | 447 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 448 | &me, sizeof(me))) |
4a58579b AF |
449 | err = -EFAULT; |
450 | mext_out: | |
2903ff01 | 451 | fdput(donor); |
748de673 AF |
452 | return err; |
453 | } | |
454 | ||
617ba13b MC |
455 | case EXT4_IOC_GROUP_ADD: { |
456 | struct ext4_new_group_data input; | |
ac046f1d | 457 | int err, err2=0; |
ac27a0ec | 458 | |
8f82f840 YY |
459 | err = ext4_resize_begin(sb); |
460 | if (err) | |
461 | return err; | |
ac27a0ec | 462 | |
617ba13b | 463 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
014a1770 DH |
464 | sizeof(input))) { |
465 | err = -EFAULT; | |
466 | goto group_add_out; | |
467 | } | |
ac27a0ec | 468 | |
bab08ab9 TT |
469 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
470 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
471 | ext4_msg(sb, KERN_ERR, | |
472 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
473 | err = -EOPNOTSUPP; |
474 | goto group_add_out; | |
bab08ab9 TT |
475 | } |
476 | ||
a561be71 | 477 | err = mnt_want_write_file(filp); |
42a74f20 | 478 | if (err) |
014a1770 | 479 | goto group_add_out; |
42a74f20 | 480 | |
617ba13b | 481 | err = ext4_group_add(sb, &input); |
ac046f1d PT |
482 | if (EXT4_SB(sb)->s_journal) { |
483 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
484 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
485 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
486 | } | |
7ffe1ea8 HK |
487 | if (err == 0) |
488 | err = err2; | |
2a79f17e | 489 | mnt_drop_write_file(filp); |
7f511862 TT |
490 | if (!err && ext4_has_group_desc_csum(sb) && |
491 | test_opt(sb, INIT_INODE_TABLE)) | |
492 | err = ext4_register_li_request(sb, input.group); | |
014a1770 | 493 | group_add_out: |
8f82f840 | 494 | ext4_resize_end(sb); |
ac27a0ec DK |
495 | return err; |
496 | } | |
497 | ||
c14c6fd5 | 498 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
499 | { |
500 | int err; | |
2e149670 | 501 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
502 | return -EACCES; |
503 | ||
a561be71 | 504 | err = mnt_want_write_file(filp); |
2a43a878 AK |
505 | if (err) |
506 | return err; | |
507 | /* | |
508 | * inode_mutex prevent write and truncate on the file. | |
509 | * Read still goes through. We take i_data_sem in | |
510 | * ext4_ext_swap_inode_data before we switch the | |
511 | * inode format to prevent read. | |
512 | */ | |
513 | mutex_lock(&(inode->i_mutex)); | |
514 | err = ext4_ext_migrate(inode); | |
515 | mutex_unlock(&(inode->i_mutex)); | |
2a79f17e | 516 | mnt_drop_write_file(filp); |
2a43a878 AK |
517 | return err; |
518 | } | |
c14c6fd5 | 519 | |
ccd2506b TT |
520 | case EXT4_IOC_ALLOC_DA_BLKS: |
521 | { | |
522 | int err; | |
2e149670 | 523 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
524 | return -EACCES; |
525 | ||
a561be71 | 526 | err = mnt_want_write_file(filp); |
ccd2506b TT |
527 | if (err) |
528 | return err; | |
529 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 530 | mnt_drop_write_file(filp); |
ccd2506b TT |
531 | return err; |
532 | } | |
533 | ||
393d1d1d DTB |
534 | case EXT4_IOC_SWAP_BOOT: |
535 | if (!(filp->f_mode & FMODE_WRITE)) | |
536 | return -EBADF; | |
537 | return swap_inode_boot_loader(sb, inode); | |
538 | ||
19c5246d YY |
539 | case EXT4_IOC_RESIZE_FS: { |
540 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 541 | int err = 0, err2 = 0; |
7f511862 | 542 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d YY |
543 | |
544 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
545 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
546 | ext4_msg(sb, KERN_ERR, | |
547 | "Online resizing not (yet) supported with bigalloc"); | |
548 | return -EOPNOTSUPP; | |
549 | } | |
550 | ||
19c5246d YY |
551 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
552 | sizeof(__u64))) { | |
553 | return -EFAULT; | |
554 | } | |
555 | ||
19c5246d YY |
556 | err = ext4_resize_begin(sb); |
557 | if (err) | |
558 | return err; | |
559 | ||
8cae6f71 | 560 | err = mnt_want_write_file(filp); |
19c5246d YY |
561 | if (err) |
562 | goto resizefs_out; | |
563 | ||
564 | err = ext4_resize_fs(sb, n_blocks_count); | |
565 | if (EXT4_SB(sb)->s_journal) { | |
566 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
567 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
568 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
569 | } | |
570 | if (err == 0) | |
571 | err = err2; | |
8cae6f71 | 572 | mnt_drop_write_file(filp); |
7f511862 TT |
573 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
574 | ext4_has_group_desc_csum(sb) && | |
575 | test_opt(sb, INIT_INODE_TABLE)) | |
576 | err = ext4_register_li_request(sb, o_group); | |
577 | ||
19c5246d YY |
578 | resizefs_out: |
579 | ext4_resize_end(sb); | |
580 | return err; | |
581 | } | |
582 | ||
e681c047 LC |
583 | case FITRIM: |
584 | { | |
41431792 | 585 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
e681c047 LC |
586 | struct fstrim_range range; |
587 | int ret = 0; | |
588 | ||
589 | if (!capable(CAP_SYS_ADMIN)) | |
590 | return -EPERM; | |
591 | ||
41431792 LC |
592 | if (!blk_queue_discard(q)) |
593 | return -EOPNOTSUPP; | |
594 | ||
e6705f7c | 595 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
596 | sizeof(range))) |
597 | return -EFAULT; | |
598 | ||
5c2ed62f LC |
599 | range.minlen = max((unsigned int)range.minlen, |
600 | q->limits.discard_granularity); | |
e681c047 LC |
601 | ret = ext4_trim_fs(sb, &range); |
602 | if (ret < 0) | |
603 | return ret; | |
604 | ||
e6705f7c | 605 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
606 | sizeof(range))) |
607 | return -EFAULT; | |
608 | ||
609 | return 0; | |
610 | } | |
7869a4a6 TT |
611 | case EXT4_IOC_PRECACHE_EXTENTS: |
612 | return ext4_ext_precache(inode); | |
e681c047 | 613 | |
ac27a0ec DK |
614 | default: |
615 | return -ENOTTY; | |
616 | } | |
617 | } | |
618 | ||
619 | #ifdef CONFIG_COMPAT | |
617ba13b | 620 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 621 | { |
ac27a0ec DK |
622 | /* These are just misnamed, they actually get/put from/to user an int */ |
623 | switch (cmd) { | |
617ba13b MC |
624 | case EXT4_IOC32_GETFLAGS: |
625 | cmd = EXT4_IOC_GETFLAGS; | |
ac27a0ec | 626 | break; |
617ba13b MC |
627 | case EXT4_IOC32_SETFLAGS: |
628 | cmd = EXT4_IOC_SETFLAGS; | |
ac27a0ec | 629 | break; |
617ba13b MC |
630 | case EXT4_IOC32_GETVERSION: |
631 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 632 | break; |
617ba13b MC |
633 | case EXT4_IOC32_SETVERSION: |
634 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 635 | break; |
617ba13b MC |
636 | case EXT4_IOC32_GROUP_EXTEND: |
637 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 638 | break; |
617ba13b MC |
639 | case EXT4_IOC32_GETVERSION_OLD: |
640 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 641 | break; |
617ba13b MC |
642 | case EXT4_IOC32_SETVERSION_OLD: |
643 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 644 | break; |
617ba13b MC |
645 | case EXT4_IOC32_GETRSVSZ: |
646 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 647 | break; |
617ba13b MC |
648 | case EXT4_IOC32_SETRSVSZ: |
649 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 650 | break; |
4d92dc0f BH |
651 | case EXT4_IOC32_GROUP_ADD: { |
652 | struct compat_ext4_new_group_input __user *uinput; | |
653 | struct ext4_new_group_input input; | |
654 | mm_segment_t old_fs; | |
655 | int err; | |
656 | ||
657 | uinput = compat_ptr(arg); | |
658 | err = get_user(input.group, &uinput->group); | |
659 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
660 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
661 | err |= get_user(input.inode_table, &uinput->inode_table); | |
662 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
663 | err |= get_user(input.reserved_blocks, | |
664 | &uinput->reserved_blocks); | |
665 | if (err) | |
666 | return -EFAULT; | |
667 | old_fs = get_fs(); | |
668 | set_fs(KERNEL_DS); | |
669 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, | |
670 | (unsigned long) &input); | |
671 | set_fs(old_fs); | |
672 | return err; | |
673 | } | |
b684b2ee | 674 | case EXT4_IOC_MOVE_EXT: |
a56e69c2 | 675 | case FITRIM: |
19c5246d | 676 | case EXT4_IOC_RESIZE_FS: |
7869a4a6 | 677 | case EXT4_IOC_PRECACHE_EXTENTS: |
b684b2ee | 678 | break; |
ac27a0ec DK |
679 | default: |
680 | return -ENOIOCTLCMD; | |
681 | } | |
5cdd7b2d | 682 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
683 | } |
684 | #endif |