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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" | |
393d1d1d | 20 | #include "ext4_extents.h" |
ac27a0ec | 21 | |
19c5246d YY |
22 | #define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1) |
23 | ||
393d1d1d DTB |
24 | /** |
25 | * Swap memory between @a and @b for @len bytes. | |
26 | * | |
27 | * @a: pointer to first memory area | |
28 | * @b: pointer to second memory area | |
29 | * @len: number of bytes to swap | |
30 | * | |
31 | */ | |
32 | static void memswap(void *a, void *b, size_t len) | |
33 | { | |
34 | unsigned char *ap, *bp; | |
35 | unsigned char tmp; | |
36 | ||
37 | ap = (unsigned char *)a; | |
38 | bp = (unsigned char *)b; | |
39 | while (len-- > 0) { | |
40 | tmp = *ap; | |
41 | *ap = *bp; | |
42 | *bp = tmp; | |
43 | ap++; | |
44 | bp++; | |
45 | } | |
46 | } | |
47 | ||
48 | /** | |
49 | * Swap i_data and associated attributes between @inode1 and @inode2. | |
50 | * This function is used for the primary swap between inode1 and inode2 | |
51 | * and also to revert this primary swap in case of errors. | |
52 | * | |
53 | * Therefore you have to make sure, that calling this method twice | |
54 | * will revert all changes. | |
55 | * | |
56 | * @inode1: pointer to first inode | |
57 | * @inode2: pointer to second inode | |
58 | */ | |
59 | static void swap_inode_data(struct inode *inode1, struct inode *inode2) | |
60 | { | |
61 | loff_t isize; | |
62 | struct ext4_inode_info *ei1; | |
63 | struct ext4_inode_info *ei2; | |
64 | ||
65 | ei1 = EXT4_I(inode1); | |
66 | ei2 = EXT4_I(inode2); | |
67 | ||
68 | memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags)); | |
69 | memswap(&inode1->i_version, &inode2->i_version, | |
70 | sizeof(inode1->i_version)); | |
71 | memswap(&inode1->i_blocks, &inode2->i_blocks, | |
72 | sizeof(inode1->i_blocks)); | |
73 | memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes)); | |
74 | memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime)); | |
75 | memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime)); | |
76 | ||
77 | memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); | |
78 | memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags)); | |
79 | memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize)); | |
80 | memswap(&ei1->i_es_tree, &ei2->i_es_tree, sizeof(ei1->i_es_tree)); | |
81 | memswap(&ei1->i_es_lru_nr, &ei2->i_es_lru_nr, sizeof(ei1->i_es_lru_nr)); | |
82 | ||
83 | isize = i_size_read(inode1); | |
84 | i_size_write(inode1, i_size_read(inode2)); | |
85 | i_size_write(inode2, isize); | |
86 | } | |
87 | ||
88 | /** | |
89 | * Swap the information from the given @inode and the inode | |
90 | * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other | |
91 | * important fields of the inodes. | |
92 | * | |
93 | * @sb: the super block of the filesystem | |
94 | * @inode: the inode to swap with EXT4_BOOT_LOADER_INO | |
95 | * | |
96 | */ | |
97 | static long swap_inode_boot_loader(struct super_block *sb, | |
98 | struct inode *inode) | |
99 | { | |
100 | handle_t *handle; | |
101 | int err; | |
102 | struct inode *inode_bl; | |
103 | struct ext4_inode_info *ei; | |
104 | struct ext4_inode_info *ei_bl; | |
105 | struct ext4_sb_info *sbi; | |
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 | ||
117 | sbi = EXT4_SB(sb); | |
118 | ei = EXT4_I(inode); | |
119 | ||
120 | inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); | |
121 | if (IS_ERR(inode_bl)) { | |
122 | err = PTR_ERR(inode_bl); | |
123 | goto swap_boot_out; | |
124 | } | |
125 | ei_bl = EXT4_I(inode_bl); | |
126 | ||
127 | filemap_flush(inode->i_mapping); | |
128 | filemap_flush(inode_bl->i_mapping); | |
129 | ||
130 | /* Protect orig inodes against a truncate and make sure, | |
131 | * that only 1 swap_inode_boot_loader is running. */ | |
132 | ext4_inode_double_lock(inode, inode_bl); | |
133 | ||
134 | truncate_inode_pages(&inode->i_data, 0); | |
135 | truncate_inode_pages(&inode_bl->i_data, 0); | |
136 | ||
137 | /* Wait for all existing dio workers */ | |
138 | ext4_inode_block_unlocked_dio(inode); | |
139 | ext4_inode_block_unlocked_dio(inode_bl); | |
140 | inode_dio_wait(inode); | |
141 | inode_dio_wait(inode_bl); | |
142 | ||
143 | handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); | |
144 | if (IS_ERR(handle)) { | |
145 | err = -EINVAL; | |
146 | goto swap_boot_out; | |
147 | } | |
148 | ||
149 | /* Protect extent tree against block allocations via delalloc */ | |
150 | ext4_double_down_write_data_sem(inode, inode_bl); | |
151 | ||
152 | if (inode_bl->i_nlink == 0) { | |
153 | /* this inode has never been used as a BOOT_LOADER */ | |
154 | set_nlink(inode_bl, 1); | |
155 | i_uid_write(inode_bl, 0); | |
156 | i_gid_write(inode_bl, 0); | |
157 | inode_bl->i_flags = 0; | |
158 | ei_bl->i_flags = 0; | |
159 | inode_bl->i_version = 1; | |
160 | i_size_write(inode_bl, 0); | |
161 | inode_bl->i_mode = S_IFREG; | |
162 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, | |
163 | EXT4_FEATURE_INCOMPAT_EXTENTS)) { | |
164 | ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); | |
165 | ext4_ext_tree_init(handle, inode_bl); | |
166 | } else | |
167 | memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); | |
168 | } | |
169 | ||
170 | swap_inode_data(inode, inode_bl); | |
171 | ||
172 | inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode); | |
173 | ||
174 | spin_lock(&sbi->s_next_gen_lock); | |
175 | inode->i_generation = sbi->s_next_generation++; | |
176 | inode_bl->i_generation = sbi->s_next_generation++; | |
177 | spin_unlock(&sbi->s_next_gen_lock); | |
178 | ||
179 | ext4_discard_preallocations(inode); | |
180 | ||
181 | err = ext4_mark_inode_dirty(handle, inode); | |
182 | if (err < 0) { | |
183 | ext4_warning(inode->i_sb, | |
184 | "couldn't mark inode #%lu dirty (err %d)", | |
185 | inode->i_ino, err); | |
186 | /* Revert all changes: */ | |
187 | swap_inode_data(inode, inode_bl); | |
188 | } else { | |
189 | err = ext4_mark_inode_dirty(handle, inode_bl); | |
190 | if (err < 0) { | |
191 | ext4_warning(inode_bl->i_sb, | |
192 | "couldn't mark inode #%lu dirty (err %d)", | |
193 | inode_bl->i_ino, err); | |
194 | /* Revert all changes: */ | |
195 | swap_inode_data(inode, inode_bl); | |
196 | ext4_mark_inode_dirty(handle, inode); | |
197 | } | |
198 | } | |
199 | ||
200 | ext4_journal_stop(handle); | |
201 | ||
202 | ext4_double_up_write_data_sem(inode, inode_bl); | |
203 | ||
204 | ext4_inode_resume_unlocked_dio(inode); | |
205 | ext4_inode_resume_unlocked_dio(inode_bl); | |
206 | ||
207 | ext4_inode_double_unlock(inode, inode_bl); | |
208 | ||
209 | iput(inode_bl); | |
210 | ||
211 | swap_boot_out: | |
212 | return err; | |
213 | } | |
214 | ||
5cdd7b2d | 215 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 216 | { |
496ad9aa | 217 | struct inode *inode = file_inode(filp); |
bab08ab9 | 218 | struct super_block *sb = inode->i_sb; |
617ba13b | 219 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 220 | unsigned int flags; |
ac27a0ec | 221 | |
af5bc92d | 222 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
223 | |
224 | switch (cmd) { | |
617ba13b | 225 | case EXT4_IOC_GETFLAGS: |
ff9ddf7e | 226 | ext4_get_inode_flags(ei); |
617ba13b | 227 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
ac27a0ec | 228 | return put_user(flags, (int __user *) arg); |
617ba13b | 229 | case EXT4_IOC_SETFLAGS: { |
ac27a0ec | 230 | handle_t *handle = NULL; |
4db46fc2 | 231 | int err, migrate = 0; |
617ba13b | 232 | struct ext4_iloc iloc; |
79906964 | 233 | unsigned int oldflags, mask, i; |
ac27a0ec DK |
234 | unsigned int jflag; |
235 | ||
2e149670 | 236 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
237 | return -EACCES; |
238 | ||
239 | if (get_user(flags, (int __user *) arg)) | |
240 | return -EFAULT; | |
241 | ||
a561be71 | 242 | err = mnt_want_write_file(filp); |
42a74f20 DH |
243 | if (err) |
244 | return err; | |
245 | ||
2dc6b0d4 | 246 | flags = ext4_mask_flags(inode->i_mode, flags); |
ac27a0ec | 247 | |
42a74f20 | 248 | err = -EPERM; |
ac27a0ec | 249 | mutex_lock(&inode->i_mutex); |
e47776a0 | 250 | /* Is it quota file? Do not allow user to mess with it */ |
42a74f20 DH |
251 | if (IS_NOQUOTA(inode)) |
252 | goto flags_out; | |
253 | ||
ac27a0ec DK |
254 | oldflags = ei->i_flags; |
255 | ||
256 | /* The JOURNAL_DATA flag is modifiable only by root */ | |
617ba13b | 257 | jflag = flags & EXT4_JOURNAL_DATA_FL; |
ac27a0ec DK |
258 | |
259 | /* | |
260 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
261 | * the relevant capability. | |
262 | * | |
263 | * This test looks nicer. Thanks to Pauline Middelink | |
264 | */ | |
617ba13b | 265 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { |
42a74f20 DH |
266 | if (!capable(CAP_LINUX_IMMUTABLE)) |
267 | goto flags_out; | |
ac27a0ec DK |
268 | } |
269 | ||
270 | /* | |
271 | * The JOURNAL_DATA flag can only be changed by | |
272 | * the relevant capability. | |
273 | */ | |
617ba13b | 274 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { |
42a74f20 DH |
275 | if (!capable(CAP_SYS_RESOURCE)) |
276 | goto flags_out; | |
ac27a0ec | 277 | } |
996bb9fd | 278 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) |
4db46fc2 | 279 | migrate = 1; |
ac27a0ec | 280 | |
c8d46e41 JZ |
281 | if (flags & EXT4_EOFBLOCKS_FL) { |
282 | /* we don't support adding EOFBLOCKS flag */ | |
283 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { | |
284 | err = -EOPNOTSUPP; | |
285 | goto flags_out; | |
286 | } | |
287 | } else if (oldflags & EXT4_EOFBLOCKS_FL) | |
288 | ext4_truncate(inode); | |
289 | ||
9924a92a | 290 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
ac27a0ec | 291 | if (IS_ERR(handle)) { |
42a74f20 DH |
292 | err = PTR_ERR(handle); |
293 | goto flags_out; | |
ac27a0ec DK |
294 | } |
295 | if (IS_SYNC(inode)) | |
0390131b | 296 | ext4_handle_sync(handle); |
617ba13b | 297 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec DK |
298 | if (err) |
299 | goto flags_err; | |
300 | ||
79906964 TT |
301 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { |
302 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
303 | continue; | |
304 | if (mask & flags) | |
305 | ext4_set_inode_flag(inode, i); | |
306 | else | |
307 | ext4_clear_inode_flag(inode, i); | |
308 | } | |
ac27a0ec | 309 | |
617ba13b | 310 | ext4_set_inode_flags(inode); |
ef7f3835 | 311 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 312 | |
617ba13b | 313 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 314 | flags_err: |
617ba13b | 315 | ext4_journal_stop(handle); |
42a74f20 DH |
316 | if (err) |
317 | goto flags_out; | |
ac27a0ec | 318 | |
617ba13b MC |
319 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) |
320 | err = ext4_change_inode_journal_flag(inode, jflag); | |
4db46fc2 AK |
321 | if (err) |
322 | goto flags_out; | |
996bb9fd TT |
323 | if (migrate) { |
324 | if (flags & EXT4_EXTENTS_FL) | |
325 | err = ext4_ext_migrate(inode); | |
326 | else | |
327 | err = ext4_ind_migrate(inode); | |
328 | } | |
329 | ||
42a74f20 | 330 | flags_out: |
ac27a0ec | 331 | mutex_unlock(&inode->i_mutex); |
2a79f17e | 332 | mnt_drop_write_file(filp); |
ac27a0ec DK |
333 | return err; |
334 | } | |
617ba13b MC |
335 | case EXT4_IOC_GETVERSION: |
336 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 337 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
338 | case EXT4_IOC_SETVERSION: |
339 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 340 | handle_t *handle; |
617ba13b | 341 | struct ext4_iloc iloc; |
ac27a0ec DK |
342 | __u32 generation; |
343 | int err; | |
344 | ||
2e149670 | 345 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 346 | return -EPERM; |
42a74f20 | 347 | |
814525f4 DW |
348 | if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, |
349 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { | |
350 | ext4_warning(sb, "Setting inode version is not " | |
351 | "supported with metadata_csum enabled."); | |
352 | return -ENOTTY; | |
353 | } | |
354 | ||
a561be71 | 355 | err = mnt_want_write_file(filp); |
42a74f20 DH |
356 | if (err) |
357 | return err; | |
358 | if (get_user(generation, (int __user *) arg)) { | |
359 | err = -EFAULT; | |
360 | goto setversion_out; | |
361 | } | |
ac27a0ec | 362 | |
6c2155b9 | 363 | mutex_lock(&inode->i_mutex); |
9924a92a | 364 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
365 | if (IS_ERR(handle)) { |
366 | err = PTR_ERR(handle); | |
6c2155b9 | 367 | goto unlock_out; |
42a74f20 | 368 | } |
617ba13b | 369 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 370 | if (err == 0) { |
ef7f3835 | 371 | inode->i_ctime = ext4_current_time(inode); |
ac27a0ec | 372 | inode->i_generation = generation; |
617ba13b | 373 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 374 | } |
617ba13b | 375 | ext4_journal_stop(handle); |
6c2155b9 DH |
376 | |
377 | unlock_out: | |
378 | mutex_unlock(&inode->i_mutex); | |
42a74f20 | 379 | setversion_out: |
2a79f17e | 380 | mnt_drop_write_file(filp); |
ac27a0ec DK |
381 | return err; |
382 | } | |
617ba13b MC |
383 | case EXT4_IOC_GROUP_EXTEND: { |
384 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 385 | int err, err2=0; |
ac27a0ec | 386 | |
8f82f840 YY |
387 | err = ext4_resize_begin(sb); |
388 | if (err) | |
389 | return err; | |
ac27a0ec | 390 | |
014a1770 DH |
391 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
392 | err = -EFAULT; | |
393 | goto group_extend_out; | |
394 | } | |
ac27a0ec | 395 | |
bab08ab9 TT |
396 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
397 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
398 | ext4_msg(sb, KERN_ERR, | |
399 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
400 | err = -EOPNOTSUPP; |
401 | goto group_extend_out; | |
bab08ab9 TT |
402 | } |
403 | ||
a561be71 | 404 | err = mnt_want_write_file(filp); |
42a74f20 | 405 | if (err) |
014a1770 | 406 | goto group_extend_out; |
42a74f20 | 407 | |
617ba13b | 408 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
409 | if (EXT4_SB(sb)->s_journal) { |
410 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
411 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
412 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
413 | } | |
7ffe1ea8 HK |
414 | if (err == 0) |
415 | err = err2; | |
2a79f17e | 416 | mnt_drop_write_file(filp); |
014a1770 | 417 | group_extend_out: |
8f82f840 | 418 | ext4_resize_end(sb); |
ac27a0ec DK |
419 | return err; |
420 | } | |
748de673 AF |
421 | |
422 | case EXT4_IOC_MOVE_EXT: { | |
423 | struct move_extent me; | |
2903ff01 AV |
424 | struct fd donor; |
425 | int err; | |
748de673 | 426 | |
4a58579b AF |
427 | if (!(filp->f_mode & FMODE_READ) || |
428 | !(filp->f_mode & FMODE_WRITE)) | |
429 | return -EBADF; | |
430 | ||
748de673 AF |
431 | if (copy_from_user(&me, |
432 | (struct move_extent __user *)arg, sizeof(me))) | |
433 | return -EFAULT; | |
4a58579b | 434 | me.moved_len = 0; |
748de673 | 435 | |
2903ff01 AV |
436 | donor = fdget(me.donor_fd); |
437 | if (!donor.file) | |
748de673 AF |
438 | return -EBADF; |
439 | ||
2903ff01 | 440 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
441 | err = -EBADF; |
442 | goto mext_out; | |
748de673 AF |
443 | } |
444 | ||
bab08ab9 TT |
445 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
446 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
447 | ext4_msg(sb, KERN_ERR, | |
448 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
449 | err = -EOPNOTSUPP; |
450 | goto mext_out; | |
bab08ab9 TT |
451 | } |
452 | ||
a561be71 | 453 | err = mnt_want_write_file(filp); |
4a58579b AF |
454 | if (err) |
455 | goto mext_out; | |
456 | ||
2903ff01 | 457 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 458 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 459 | mnt_drop_write_file(filp); |
748de673 | 460 | |
60e6679e | 461 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 462 | &me, sizeof(me))) |
4a58579b AF |
463 | err = -EFAULT; |
464 | mext_out: | |
2903ff01 | 465 | fdput(donor); |
748de673 AF |
466 | return err; |
467 | } | |
468 | ||
617ba13b MC |
469 | case EXT4_IOC_GROUP_ADD: { |
470 | struct ext4_new_group_data input; | |
ac046f1d | 471 | int err, err2=0; |
ac27a0ec | 472 | |
8f82f840 YY |
473 | err = ext4_resize_begin(sb); |
474 | if (err) | |
475 | return err; | |
ac27a0ec | 476 | |
617ba13b | 477 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
014a1770 DH |
478 | sizeof(input))) { |
479 | err = -EFAULT; | |
480 | goto group_add_out; | |
481 | } | |
ac27a0ec | 482 | |
bab08ab9 TT |
483 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
484 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
485 | ext4_msg(sb, KERN_ERR, | |
486 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
487 | err = -EOPNOTSUPP; |
488 | goto group_add_out; | |
bab08ab9 TT |
489 | } |
490 | ||
a561be71 | 491 | err = mnt_want_write_file(filp); |
42a74f20 | 492 | if (err) |
014a1770 | 493 | goto group_add_out; |
42a74f20 | 494 | |
617ba13b | 495 | err = ext4_group_add(sb, &input); |
ac046f1d PT |
496 | if (EXT4_SB(sb)->s_journal) { |
497 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
498 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
499 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
500 | } | |
7ffe1ea8 HK |
501 | if (err == 0) |
502 | err = err2; | |
2a79f17e | 503 | mnt_drop_write_file(filp); |
7f511862 TT |
504 | if (!err && ext4_has_group_desc_csum(sb) && |
505 | test_opt(sb, INIT_INODE_TABLE)) | |
506 | err = ext4_register_li_request(sb, input.group); | |
014a1770 | 507 | group_add_out: |
8f82f840 | 508 | ext4_resize_end(sb); |
ac27a0ec DK |
509 | return err; |
510 | } | |
511 | ||
c14c6fd5 | 512 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
513 | { |
514 | int err; | |
2e149670 | 515 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
516 | return -EACCES; |
517 | ||
a561be71 | 518 | err = mnt_want_write_file(filp); |
2a43a878 AK |
519 | if (err) |
520 | return err; | |
521 | /* | |
522 | * inode_mutex prevent write and truncate on the file. | |
523 | * Read still goes through. We take i_data_sem in | |
524 | * ext4_ext_swap_inode_data before we switch the | |
525 | * inode format to prevent read. | |
526 | */ | |
527 | mutex_lock(&(inode->i_mutex)); | |
528 | err = ext4_ext_migrate(inode); | |
529 | mutex_unlock(&(inode->i_mutex)); | |
2a79f17e | 530 | mnt_drop_write_file(filp); |
2a43a878 AK |
531 | return err; |
532 | } | |
c14c6fd5 | 533 | |
ccd2506b TT |
534 | case EXT4_IOC_ALLOC_DA_BLKS: |
535 | { | |
536 | int err; | |
2e149670 | 537 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
538 | return -EACCES; |
539 | ||
a561be71 | 540 | err = mnt_want_write_file(filp); |
ccd2506b TT |
541 | if (err) |
542 | return err; | |
543 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 544 | mnt_drop_write_file(filp); |
ccd2506b TT |
545 | return err; |
546 | } | |
547 | ||
393d1d1d DTB |
548 | case EXT4_IOC_SWAP_BOOT: |
549 | if (!(filp->f_mode & FMODE_WRITE)) | |
550 | return -EBADF; | |
551 | return swap_inode_boot_loader(sb, inode); | |
552 | ||
19c5246d YY |
553 | case EXT4_IOC_RESIZE_FS: { |
554 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 555 | int err = 0, err2 = 0; |
7f511862 | 556 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d YY |
557 | |
558 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
559 | EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { | |
560 | ext4_msg(sb, KERN_ERR, | |
561 | "Online resizing not (yet) supported with bigalloc"); | |
562 | return -EOPNOTSUPP; | |
563 | } | |
564 | ||
19c5246d YY |
565 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
566 | sizeof(__u64))) { | |
567 | return -EFAULT; | |
568 | } | |
569 | ||
19c5246d YY |
570 | err = ext4_resize_begin(sb); |
571 | if (err) | |
572 | return err; | |
573 | ||
8cae6f71 | 574 | err = mnt_want_write_file(filp); |
19c5246d YY |
575 | if (err) |
576 | goto resizefs_out; | |
577 | ||
578 | err = ext4_resize_fs(sb, n_blocks_count); | |
579 | if (EXT4_SB(sb)->s_journal) { | |
580 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
581 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
582 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
583 | } | |
584 | if (err == 0) | |
585 | err = err2; | |
8cae6f71 | 586 | mnt_drop_write_file(filp); |
7f511862 TT |
587 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
588 | ext4_has_group_desc_csum(sb) && | |
589 | test_opt(sb, INIT_INODE_TABLE)) | |
590 | err = ext4_register_li_request(sb, o_group); | |
591 | ||
19c5246d YY |
592 | resizefs_out: |
593 | ext4_resize_end(sb); | |
594 | return err; | |
595 | } | |
596 | ||
e681c047 LC |
597 | case FITRIM: |
598 | { | |
41431792 | 599 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
e681c047 LC |
600 | struct fstrim_range range; |
601 | int ret = 0; | |
602 | ||
603 | if (!capable(CAP_SYS_ADMIN)) | |
604 | return -EPERM; | |
605 | ||
41431792 LC |
606 | if (!blk_queue_discard(q)) |
607 | return -EOPNOTSUPP; | |
608 | ||
e6705f7c | 609 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
610 | sizeof(range))) |
611 | return -EFAULT; | |
612 | ||
5c2ed62f LC |
613 | range.minlen = max((unsigned int)range.minlen, |
614 | q->limits.discard_granularity); | |
e681c047 LC |
615 | ret = ext4_trim_fs(sb, &range); |
616 | if (ret < 0) | |
617 | return ret; | |
618 | ||
e6705f7c | 619 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
620 | sizeof(range))) |
621 | return -EFAULT; | |
622 | ||
623 | return 0; | |
624 | } | |
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: |
b684b2ee | 689 | break; |
ac27a0ec DK |
690 | default: |
691 | return -ENOIOCTLCMD; | |
692 | } | |
5cdd7b2d | 693 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
694 | } |
695 | #endif |