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1/*
2 * linux/fs/ext4/ioctl.c
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>
11#include <linux/jbd2.h>
12#include <linux/capability.h>
13#include <linux/time.h>
14#include <linux/compat.h>
15#include <linux/mount.h>
16#include <linux/file.h>
17#include <asm/uaccess.h>
18#include "ext4_jbd2.h"
19#include "ext4.h"
20
21long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
22{
23 struct inode *inode = filp->f_dentry->d_inode;
24 struct ext4_inode_info *ei = EXT4_I(inode);
25 unsigned int flags;
26
27 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
28
29 switch (cmd) {
30 case EXT4_IOC_GETFLAGS:
31 ext4_get_inode_flags(ei);
32 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
33 return put_user(flags, (int __user *) arg);
34 case EXT4_IOC_SETFLAGS: {
35 handle_t *handle = NULL;
36 int err, migrate = 0;
37 struct ext4_iloc iloc;
38 unsigned int oldflags;
39 unsigned int jflag;
40
41 if (!inode_owner_or_capable(inode))
42 return -EACCES;
43
44 if (get_user(flags, (int __user *) arg))
45 return -EFAULT;
46
47 err = mnt_want_write(filp->f_path.mnt);
48 if (err)
49 return err;
50
51 flags = ext4_mask_flags(inode->i_mode, flags);
52
53 err = -EPERM;
54 mutex_lock(&inode->i_mutex);
55 /* Is it quota file? Do not allow user to mess with it */
56 if (IS_NOQUOTA(inode))
57 goto flags_out;
58
59 oldflags = ei->i_flags;
60
61 /* The JOURNAL_DATA flag is modifiable only by root */
62 jflag = flags & EXT4_JOURNAL_DATA_FL;
63
64 /*
65 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
66 * the relevant capability.
67 *
68 * This test looks nicer. Thanks to Pauline Middelink
69 */
70 if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
71 if (!capable(CAP_LINUX_IMMUTABLE))
72 goto flags_out;
73 }
74
75 /*
76 * The JOURNAL_DATA flag can only be changed by
77 * the relevant capability.
78 */
79 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
80 if (!capable(CAP_SYS_RESOURCE))
81 goto flags_out;
82 }
83 if (oldflags & EXT4_EXTENTS_FL) {
84 /* We don't support clearning extent flags */
85 if (!(flags & EXT4_EXTENTS_FL)) {
86 err = -EOPNOTSUPP;
87 goto flags_out;
88 }
89 } else if (flags & EXT4_EXTENTS_FL) {
90 /* migrate the file */
91 migrate = 1;
92 flags &= ~EXT4_EXTENTS_FL;
93 }
94
95 if (flags & EXT4_EOFBLOCKS_FL) {
96 /* we don't support adding EOFBLOCKS flag */
97 if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
98 err = -EOPNOTSUPP;
99 goto flags_out;
100 }
101 } else if (oldflags & EXT4_EOFBLOCKS_FL)
102 ext4_truncate(inode);
103
104 handle = ext4_journal_start(inode, 1);
105 if (IS_ERR(handle)) {
106 err = PTR_ERR(handle);
107 goto flags_out;
108 }
109 if (IS_SYNC(inode))
110 ext4_handle_sync(handle);
111 err = ext4_reserve_inode_write(handle, inode, &iloc);
112 if (err)
113 goto flags_err;
114
115 flags = flags & EXT4_FL_USER_MODIFIABLE;
116 flags |= oldflags & ~EXT4_FL_USER_MODIFIABLE;
117 ei->i_flags = flags;
118
119 ext4_set_inode_flags(inode);
120 inode->i_ctime = ext4_current_time(inode);
121
122 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
123flags_err:
124 ext4_journal_stop(handle);
125 if (err)
126 goto flags_out;
127
128 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
129 err = ext4_change_inode_journal_flag(inode, jflag);
130 if (err)
131 goto flags_out;
132 if (migrate)
133 err = ext4_ext_migrate(inode);
134flags_out:
135 mutex_unlock(&inode->i_mutex);
136 mnt_drop_write(filp->f_path.mnt);
137 return err;
138 }
139 case EXT4_IOC_GETVERSION:
140 case EXT4_IOC_GETVERSION_OLD:
141 return put_user(inode->i_generation, (int __user *) arg);
142 case EXT4_IOC_SETVERSION:
143 case EXT4_IOC_SETVERSION_OLD: {
144 handle_t *handle;
145 struct ext4_iloc iloc;
146 __u32 generation;
147 int err;
148
149 if (!inode_owner_or_capable(inode))
150 return -EPERM;
151
152 err = mnt_want_write(filp->f_path.mnt);
153 if (err)
154 return err;
155 if (get_user(generation, (int __user *) arg)) {
156 err = -EFAULT;
157 goto setversion_out;
158 }
159
160 handle = ext4_journal_start(inode, 1);
161 if (IS_ERR(handle)) {
162 err = PTR_ERR(handle);
163 goto setversion_out;
164 }
165 err = ext4_reserve_inode_write(handle, inode, &iloc);
166 if (err == 0) {
167 inode->i_ctime = ext4_current_time(inode);
168 inode->i_generation = generation;
169 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
170 }
171 ext4_journal_stop(handle);
172setversion_out:
173 mnt_drop_write(filp->f_path.mnt);
174 return err;
175 }
176#ifdef CONFIG_JBD2_DEBUG
177 case EXT4_IOC_WAIT_FOR_READONLY:
178 /*
179 * This is racy - by the time we're woken up and running,
180 * the superblock could be released. And the module could
181 * have been unloaded. So sue me.
182 *
183 * Returns 1 if it slept, else zero.
184 */
185 {
186 struct super_block *sb = inode->i_sb;
187 DECLARE_WAITQUEUE(wait, current);
188 int ret = 0;
189
190 set_current_state(TASK_INTERRUPTIBLE);
191 add_wait_queue(&EXT4_SB(sb)->ro_wait_queue, &wait);
192 if (timer_pending(&EXT4_SB(sb)->turn_ro_timer)) {
193 schedule();
194 ret = 1;
195 }
196 remove_wait_queue(&EXT4_SB(sb)->ro_wait_queue, &wait);
197 return ret;
198 }
199#endif
200 case EXT4_IOC_GROUP_EXTEND: {
201 ext4_fsblk_t n_blocks_count;
202 struct super_block *sb = inode->i_sb;
203 int err, err2=0;
204
205 err = ext4_resize_begin(sb);
206 if (err)
207 return err;
208
209 if (get_user(n_blocks_count, (__u32 __user *)arg))
210 return -EFAULT;
211
212 err = mnt_want_write(filp->f_path.mnt);
213 if (err)
214 return err;
215
216 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
217 if (EXT4_SB(sb)->s_journal) {
218 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
219 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
220 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
221 }
222 if (err == 0)
223 err = err2;
224 mnt_drop_write(filp->f_path.mnt);
225 ext4_resize_end(sb);
226
227 return err;
228 }
229
230 case EXT4_IOC_MOVE_EXT: {
231 struct move_extent me;
232 struct file *donor_filp;
233 int err;
234
235 if (!(filp->f_mode & FMODE_READ) ||
236 !(filp->f_mode & FMODE_WRITE))
237 return -EBADF;
238
239 if (copy_from_user(&me,
240 (struct move_extent __user *)arg, sizeof(me)))
241 return -EFAULT;
242 me.moved_len = 0;
243
244 donor_filp = fget(me.donor_fd);
245 if (!donor_filp)
246 return -EBADF;
247
248 if (!(donor_filp->f_mode & FMODE_WRITE)) {
249 err = -EBADF;
250 goto mext_out;
251 }
252
253 err = mnt_want_write(filp->f_path.mnt);
254 if (err)
255 goto mext_out;
256
257 err = ext4_move_extents(filp, donor_filp, me.orig_start,
258 me.donor_start, me.len, &me.moved_len);
259 mnt_drop_write(filp->f_path.mnt);
260 if (me.moved_len > 0)
261 file_remove_suid(donor_filp);
262
263 if (copy_to_user((struct move_extent __user *)arg,
264 &me, sizeof(me)))
265 err = -EFAULT;
266mext_out:
267 fput(donor_filp);
268 return err;
269 }
270
271 case EXT4_IOC_GROUP_ADD: {
272 struct ext4_new_group_data input;
273 struct super_block *sb = inode->i_sb;
274 int err, err2=0;
275
276 err = ext4_resize_begin(sb);
277 if (err)
278 return err;
279
280 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
281 sizeof(input)))
282 return -EFAULT;
283
284 err = mnt_want_write(filp->f_path.mnt);
285 if (err)
286 return err;
287
288 err = ext4_group_add(sb, &input);
289 if (EXT4_SB(sb)->s_journal) {
290 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
291 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
292 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
293 }
294 if (err == 0)
295 err = err2;
296 mnt_drop_write(filp->f_path.mnt);
297 ext4_resize_end(sb);
298
299 return err;
300 }
301
302 case EXT4_IOC_MIGRATE:
303 {
304 int err;
305 if (!inode_owner_or_capable(inode))
306 return -EACCES;
307
308 err = mnt_want_write(filp->f_path.mnt);
309 if (err)
310 return err;
311 /*
312 * inode_mutex prevent write and truncate on the file.
313 * Read still goes through. We take i_data_sem in
314 * ext4_ext_swap_inode_data before we switch the
315 * inode format to prevent read.
316 */
317 mutex_lock(&(inode->i_mutex));
318 err = ext4_ext_migrate(inode);
319 mutex_unlock(&(inode->i_mutex));
320 mnt_drop_write(filp->f_path.mnt);
321 return err;
322 }
323
324 case EXT4_IOC_ALLOC_DA_BLKS:
325 {
326 int err;
327 if (!inode_owner_or_capable(inode))
328 return -EACCES;
329
330 err = mnt_want_write(filp->f_path.mnt);
331 if (err)
332 return err;
333 err = ext4_alloc_da_blocks(inode);
334 mnt_drop_write(filp->f_path.mnt);
335 return err;
336 }
337
338 case FITRIM:
339 {
340 struct super_block *sb = inode->i_sb;
341 struct request_queue *q = bdev_get_queue(sb->s_bdev);
342 struct fstrim_range range;
343 int ret = 0;
344
345 if (!capable(CAP_SYS_ADMIN))
346 return -EPERM;
347
348 if (!blk_queue_discard(q))
349 return -EOPNOTSUPP;
350
351 if (copy_from_user(&range, (struct fstrim_range *)arg,
352 sizeof(range)))
353 return -EFAULT;
354
355 range.minlen = max((unsigned int)range.minlen,
356 q->limits.discard_granularity);
357 ret = ext4_trim_fs(sb, &range);
358 if (ret < 0)
359 return ret;
360
361 if (copy_to_user((struct fstrim_range *)arg, &range,
362 sizeof(range)))
363 return -EFAULT;
364
365 return 0;
366 }
367
368 default:
369 return -ENOTTY;
370 }
371}
372
373#ifdef CONFIG_COMPAT
374long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
375{
376 /* These are just misnamed, they actually get/put from/to user an int */
377 switch (cmd) {
378 case EXT4_IOC32_GETFLAGS:
379 cmd = EXT4_IOC_GETFLAGS;
380 break;
381 case EXT4_IOC32_SETFLAGS:
382 cmd = EXT4_IOC_SETFLAGS;
383 break;
384 case EXT4_IOC32_GETVERSION:
385 cmd = EXT4_IOC_GETVERSION;
386 break;
387 case EXT4_IOC32_SETVERSION:
388 cmd = EXT4_IOC_SETVERSION;
389 break;
390 case EXT4_IOC32_GROUP_EXTEND:
391 cmd = EXT4_IOC_GROUP_EXTEND;
392 break;
393 case EXT4_IOC32_GETVERSION_OLD:
394 cmd = EXT4_IOC_GETVERSION_OLD;
395 break;
396 case EXT4_IOC32_SETVERSION_OLD:
397 cmd = EXT4_IOC_SETVERSION_OLD;
398 break;
399#ifdef CONFIG_JBD2_DEBUG
400 case EXT4_IOC32_WAIT_FOR_READONLY:
401 cmd = EXT4_IOC_WAIT_FOR_READONLY;
402 break;
403#endif
404 case EXT4_IOC32_GETRSVSZ:
405 cmd = EXT4_IOC_GETRSVSZ;
406 break;
407 case EXT4_IOC32_SETRSVSZ:
408 cmd = EXT4_IOC_SETRSVSZ;
409 break;
410 case EXT4_IOC32_GROUP_ADD: {
411 struct compat_ext4_new_group_input __user *uinput;
412 struct ext4_new_group_input input;
413 mm_segment_t old_fs;
414 int err;
415
416 uinput = compat_ptr(arg);
417 err = get_user(input.group, &uinput->group);
418 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
419 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
420 err |= get_user(input.inode_table, &uinput->inode_table);
421 err |= get_user(input.blocks_count, &uinput->blocks_count);
422 err |= get_user(input.reserved_blocks,
423 &uinput->reserved_blocks);
424 if (err)
425 return -EFAULT;
426 old_fs = get_fs();
427 set_fs(KERNEL_DS);
428 err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD,
429 (unsigned long) &input);
430 set_fs(old_fs);
431 return err;
432 }
433 case EXT4_IOC_MOVE_EXT:
434 case FITRIM:
435 break;
436 default:
437 return -ENOIOCTLCMD;
438 }
439 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
440}
441#endif
1/*
2 * linux/fs/ext4/ioctl.c
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>
11#include <linux/capability.h>
12#include <linux/time.h>
13#include <linux/compat.h>
14#include <linux/mount.h>
15#include <linux/file.h>
16#include <linux/quotaops.h>
17#include <linux/uuid.h>
18#include <linux/uaccess.h>
19#include "ext4_jbd2.h"
20#include "ext4.h"
21
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 */
30static void memswap(void *a, void *b, size_t len)
31{
32 unsigned char *ap, *bp;
33
34 ap = (unsigned char *)a;
35 bp = (unsigned char *)b;
36 while (len-- > 0) {
37 swap(*ap, *bp);
38 ap++;
39 bp++;
40 }
41}
42
43/**
44 * Swap i_data and associated attributes between @inode1 and @inode2.
45 * This function is used for the primary swap between inode1 and inode2
46 * and also to revert this primary swap in case of errors.
47 *
48 * Therefore you have to make sure, that calling this method twice
49 * will revert all changes.
50 *
51 * @inode1: pointer to first inode
52 * @inode2: pointer to second inode
53 */
54static void swap_inode_data(struct inode *inode1, struct inode *inode2)
55{
56 loff_t isize;
57 struct ext4_inode_info *ei1;
58 struct ext4_inode_info *ei2;
59
60 ei1 = EXT4_I(inode1);
61 ei2 = EXT4_I(inode2);
62
63 memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags));
64 memswap(&inode1->i_version, &inode2->i_version,
65 sizeof(inode1->i_version));
66 memswap(&inode1->i_blocks, &inode2->i_blocks,
67 sizeof(inode1->i_blocks));
68 memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes));
69 memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime));
70 memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime));
71
72 memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
73 memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags));
74 memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize));
75 ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
76 ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
77
78 isize = i_size_read(inode1);
79 i_size_write(inode1, i_size_read(inode2));
80 i_size_write(inode2, isize);
81}
82
83/**
84 * Swap the information from the given @inode and the inode
85 * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
86 * important fields of the inodes.
87 *
88 * @sb: the super block of the filesystem
89 * @inode: the inode to swap with EXT4_BOOT_LOADER_INO
90 *
91 */
92static long swap_inode_boot_loader(struct super_block *sb,
93 struct inode *inode)
94{
95 handle_t *handle;
96 int err;
97 struct inode *inode_bl;
98 struct ext4_inode_info *ei_bl;
99 struct ext4_sb_info *sbi = EXT4_SB(sb);
100
101 if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode))
102 return -EINVAL;
103
104 if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN))
105 return -EPERM;
106
107 inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO);
108 if (IS_ERR(inode_bl))
109 return PTR_ERR(inode_bl);
110 ei_bl = EXT4_I(inode_bl);
111
112 filemap_flush(inode->i_mapping);
113 filemap_flush(inode_bl->i_mapping);
114
115 /* Protect orig inodes against a truncate and make sure,
116 * that only 1 swap_inode_boot_loader is running. */
117 lock_two_nondirectories(inode, inode_bl);
118
119 truncate_inode_pages(&inode->i_data, 0);
120 truncate_inode_pages(&inode_bl->i_data, 0);
121
122 /* Wait for all existing dio workers */
123 ext4_inode_block_unlocked_dio(inode);
124 ext4_inode_block_unlocked_dio(inode_bl);
125 inode_dio_wait(inode);
126 inode_dio_wait(inode_bl);
127
128 handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
129 if (IS_ERR(handle)) {
130 err = -EINVAL;
131 goto journal_err_out;
132 }
133
134 /* Protect extent tree against block allocations via delalloc */
135 ext4_double_down_write_data_sem(inode, inode_bl);
136
137 if (inode_bl->i_nlink == 0) {
138 /* this inode has never been used as a BOOT_LOADER */
139 set_nlink(inode_bl, 1);
140 i_uid_write(inode_bl, 0);
141 i_gid_write(inode_bl, 0);
142 inode_bl->i_flags = 0;
143 ei_bl->i_flags = 0;
144 inode_bl->i_version = 1;
145 i_size_write(inode_bl, 0);
146 inode_bl->i_mode = S_IFREG;
147 if (ext4_has_feature_extents(sb)) {
148 ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
149 ext4_ext_tree_init(handle, inode_bl);
150 } else
151 memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
152 }
153
154 swap_inode_data(inode, inode_bl);
155
156 inode->i_ctime = inode_bl->i_ctime = current_time(inode);
157
158 spin_lock(&sbi->s_next_gen_lock);
159 inode->i_generation = sbi->s_next_generation++;
160 inode_bl->i_generation = sbi->s_next_generation++;
161 spin_unlock(&sbi->s_next_gen_lock);
162
163 ext4_discard_preallocations(inode);
164
165 err = ext4_mark_inode_dirty(handle, inode);
166 if (err < 0) {
167 ext4_warning(inode->i_sb,
168 "couldn't mark inode #%lu dirty (err %d)",
169 inode->i_ino, err);
170 /* Revert all changes: */
171 swap_inode_data(inode, inode_bl);
172 } else {
173 err = ext4_mark_inode_dirty(handle, inode_bl);
174 if (err < 0) {
175 ext4_warning(inode_bl->i_sb,
176 "couldn't mark inode #%lu dirty (err %d)",
177 inode_bl->i_ino, err);
178 /* Revert all changes: */
179 swap_inode_data(inode, inode_bl);
180 ext4_mark_inode_dirty(handle, inode);
181 }
182 }
183 ext4_journal_stop(handle);
184 ext4_double_up_write_data_sem(inode, inode_bl);
185
186journal_err_out:
187 ext4_inode_resume_unlocked_dio(inode);
188 ext4_inode_resume_unlocked_dio(inode_bl);
189 unlock_two_nondirectories(inode, inode_bl);
190 iput(inode_bl);
191 return err;
192}
193
194#ifdef CONFIG_EXT4_FS_ENCRYPTION
195static int uuid_is_zero(__u8 u[16])
196{
197 int i;
198
199 for (i = 0; i < 16; i++)
200 if (u[i])
201 return 0;
202 return 1;
203}
204#endif
205
206static int ext4_ioctl_setflags(struct inode *inode,
207 unsigned int flags)
208{
209 struct ext4_inode_info *ei = EXT4_I(inode);
210 handle_t *handle = NULL;
211 int err = -EPERM, migrate = 0;
212 struct ext4_iloc iloc;
213 unsigned int oldflags, mask, i;
214 unsigned int jflag;
215
216 /* Is it quota file? Do not allow user to mess with it */
217 if (IS_NOQUOTA(inode))
218 goto flags_out;
219
220 oldflags = ei->i_flags;
221
222 /* The JOURNAL_DATA flag is modifiable only by root */
223 jflag = flags & EXT4_JOURNAL_DATA_FL;
224
225 /*
226 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
227 * the relevant capability.
228 *
229 * This test looks nicer. Thanks to Pauline Middelink
230 */
231 if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
232 if (!capable(CAP_LINUX_IMMUTABLE))
233 goto flags_out;
234 }
235
236 /*
237 * The JOURNAL_DATA flag can only be changed by
238 * the relevant capability.
239 */
240 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
241 if (!capable(CAP_SYS_RESOURCE))
242 goto flags_out;
243 }
244 if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
245 migrate = 1;
246
247 if (flags & EXT4_EOFBLOCKS_FL) {
248 /* we don't support adding EOFBLOCKS flag */
249 if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
250 err = -EOPNOTSUPP;
251 goto flags_out;
252 }
253 } else if (oldflags & EXT4_EOFBLOCKS_FL) {
254 err = ext4_truncate(inode);
255 if (err)
256 goto flags_out;
257 }
258
259 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
260 if (IS_ERR(handle)) {
261 err = PTR_ERR(handle);
262 goto flags_out;
263 }
264 if (IS_SYNC(inode))
265 ext4_handle_sync(handle);
266 err = ext4_reserve_inode_write(handle, inode, &iloc);
267 if (err)
268 goto flags_err;
269
270 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
271 if (!(mask & EXT4_FL_USER_MODIFIABLE))
272 continue;
273 /* These flags get special treatment later */
274 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
275 continue;
276 if (mask & flags)
277 ext4_set_inode_flag(inode, i);
278 else
279 ext4_clear_inode_flag(inode, i);
280 }
281
282 ext4_set_inode_flags(inode);
283 inode->i_ctime = current_time(inode);
284
285 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
286flags_err:
287 ext4_journal_stop(handle);
288 if (err)
289 goto flags_out;
290
291 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
292 err = ext4_change_inode_journal_flag(inode, jflag);
293 if (err)
294 goto flags_out;
295 if (migrate) {
296 if (flags & EXT4_EXTENTS_FL)
297 err = ext4_ext_migrate(inode);
298 else
299 err = ext4_ind_migrate(inode);
300 }
301
302flags_out:
303 return err;
304}
305
306#ifdef CONFIG_QUOTA
307static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
308{
309 struct inode *inode = file_inode(filp);
310 struct super_block *sb = inode->i_sb;
311 struct ext4_inode_info *ei = EXT4_I(inode);
312 int err, rc;
313 handle_t *handle;
314 kprojid_t kprojid;
315 struct ext4_iloc iloc;
316 struct ext4_inode *raw_inode;
317 struct dquot *transfer_to[MAXQUOTAS] = { };
318
319 if (!ext4_has_feature_project(sb)) {
320 if (projid != EXT4_DEF_PROJID)
321 return -EOPNOTSUPP;
322 else
323 return 0;
324 }
325
326 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
327 return -EOPNOTSUPP;
328
329 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
330
331 if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
332 return 0;
333
334 err = mnt_want_write_file(filp);
335 if (err)
336 return err;
337
338 err = -EPERM;
339 inode_lock(inode);
340 /* Is it quota file? Do not allow user to mess with it */
341 if (IS_NOQUOTA(inode))
342 goto out_unlock;
343
344 err = ext4_get_inode_loc(inode, &iloc);
345 if (err)
346 goto out_unlock;
347
348 raw_inode = ext4_raw_inode(&iloc);
349 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
350 err = -EOVERFLOW;
351 brelse(iloc.bh);
352 goto out_unlock;
353 }
354 brelse(iloc.bh);
355
356 dquot_initialize(inode);
357
358 handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
359 EXT4_QUOTA_INIT_BLOCKS(sb) +
360 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
361 if (IS_ERR(handle)) {
362 err = PTR_ERR(handle);
363 goto out_unlock;
364 }
365
366 err = ext4_reserve_inode_write(handle, inode, &iloc);
367 if (err)
368 goto out_stop;
369
370 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
371 if (!IS_ERR(transfer_to[PRJQUOTA])) {
372 err = __dquot_transfer(inode, transfer_to);
373 dqput(transfer_to[PRJQUOTA]);
374 if (err)
375 goto out_dirty;
376 }
377
378 EXT4_I(inode)->i_projid = kprojid;
379 inode->i_ctime = current_time(inode);
380out_dirty:
381 rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
382 if (!err)
383 err = rc;
384out_stop:
385 ext4_journal_stop(handle);
386out_unlock:
387 inode_unlock(inode);
388 mnt_drop_write_file(filp);
389 return err;
390}
391#else
392static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
393{
394 if (projid != EXT4_DEF_PROJID)
395 return -EOPNOTSUPP;
396 return 0;
397}
398#endif
399
400/* Transfer internal flags to xflags */
401static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
402{
403 __u32 xflags = 0;
404
405 if (iflags & EXT4_SYNC_FL)
406 xflags |= FS_XFLAG_SYNC;
407 if (iflags & EXT4_IMMUTABLE_FL)
408 xflags |= FS_XFLAG_IMMUTABLE;
409 if (iflags & EXT4_APPEND_FL)
410 xflags |= FS_XFLAG_APPEND;
411 if (iflags & EXT4_NODUMP_FL)
412 xflags |= FS_XFLAG_NODUMP;
413 if (iflags & EXT4_NOATIME_FL)
414 xflags |= FS_XFLAG_NOATIME;
415 if (iflags & EXT4_PROJINHERIT_FL)
416 xflags |= FS_XFLAG_PROJINHERIT;
417 return xflags;
418}
419
420#define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
421 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
422 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
423
424/* Transfer xflags flags to internal */
425static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
426{
427 unsigned long iflags = 0;
428
429 if (xflags & FS_XFLAG_SYNC)
430 iflags |= EXT4_SYNC_FL;
431 if (xflags & FS_XFLAG_IMMUTABLE)
432 iflags |= EXT4_IMMUTABLE_FL;
433 if (xflags & FS_XFLAG_APPEND)
434 iflags |= EXT4_APPEND_FL;
435 if (xflags & FS_XFLAG_NODUMP)
436 iflags |= EXT4_NODUMP_FL;
437 if (xflags & FS_XFLAG_NOATIME)
438 iflags |= EXT4_NOATIME_FL;
439 if (xflags & FS_XFLAG_PROJINHERIT)
440 iflags |= EXT4_PROJINHERIT_FL;
441
442 return iflags;
443}
444
445long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
446{
447 struct inode *inode = file_inode(filp);
448 struct super_block *sb = inode->i_sb;
449 struct ext4_inode_info *ei = EXT4_I(inode);
450 unsigned int flags;
451
452 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
453
454 switch (cmd) {
455 case EXT4_IOC_GETFLAGS:
456 ext4_get_inode_flags(ei);
457 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
458 return put_user(flags, (int __user *) arg);
459 case EXT4_IOC_SETFLAGS: {
460 int err;
461
462 if (!inode_owner_or_capable(inode))
463 return -EACCES;
464
465 if (get_user(flags, (int __user *) arg))
466 return -EFAULT;
467
468 if (flags & ~EXT4_FL_USER_VISIBLE)
469 return -EOPNOTSUPP;
470 /*
471 * chattr(1) grabs flags via GETFLAGS, modifies the result and
472 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
473 * more restrictive than just silently masking off visible but
474 * not settable flags as we always did.
475 */
476 flags &= EXT4_FL_USER_MODIFIABLE;
477 if (ext4_mask_flags(inode->i_mode, flags) != flags)
478 return -EOPNOTSUPP;
479
480 err = mnt_want_write_file(filp);
481 if (err)
482 return err;
483
484 inode_lock(inode);
485 err = ext4_ioctl_setflags(inode, flags);
486 inode_unlock(inode);
487 mnt_drop_write_file(filp);
488 return err;
489 }
490 case EXT4_IOC_GETVERSION:
491 case EXT4_IOC_GETVERSION_OLD:
492 return put_user(inode->i_generation, (int __user *) arg);
493 case EXT4_IOC_SETVERSION:
494 case EXT4_IOC_SETVERSION_OLD: {
495 handle_t *handle;
496 struct ext4_iloc iloc;
497 __u32 generation;
498 int err;
499
500 if (!inode_owner_or_capable(inode))
501 return -EPERM;
502
503 if (ext4_has_metadata_csum(inode->i_sb)) {
504 ext4_warning(sb, "Setting inode version is not "
505 "supported with metadata_csum enabled.");
506 return -ENOTTY;
507 }
508
509 err = mnt_want_write_file(filp);
510 if (err)
511 return err;
512 if (get_user(generation, (int __user *) arg)) {
513 err = -EFAULT;
514 goto setversion_out;
515 }
516
517 inode_lock(inode);
518 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
519 if (IS_ERR(handle)) {
520 err = PTR_ERR(handle);
521 goto unlock_out;
522 }
523 err = ext4_reserve_inode_write(handle, inode, &iloc);
524 if (err == 0) {
525 inode->i_ctime = current_time(inode);
526 inode->i_generation = generation;
527 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
528 }
529 ext4_journal_stop(handle);
530
531unlock_out:
532 inode_unlock(inode);
533setversion_out:
534 mnt_drop_write_file(filp);
535 return err;
536 }
537 case EXT4_IOC_GROUP_EXTEND: {
538 ext4_fsblk_t n_blocks_count;
539 int err, err2=0;
540
541 err = ext4_resize_begin(sb);
542 if (err)
543 return err;
544
545 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
546 err = -EFAULT;
547 goto group_extend_out;
548 }
549
550 if (ext4_has_feature_bigalloc(sb)) {
551 ext4_msg(sb, KERN_ERR,
552 "Online resizing not supported with bigalloc");
553 err = -EOPNOTSUPP;
554 goto group_extend_out;
555 }
556
557 err = mnt_want_write_file(filp);
558 if (err)
559 goto group_extend_out;
560
561 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
562 if (EXT4_SB(sb)->s_journal) {
563 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
564 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
565 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
566 }
567 if (err == 0)
568 err = err2;
569 mnt_drop_write_file(filp);
570group_extend_out:
571 ext4_resize_end(sb);
572 return err;
573 }
574
575 case EXT4_IOC_MOVE_EXT: {
576 struct move_extent me;
577 struct fd donor;
578 int err;
579
580 if (!(filp->f_mode & FMODE_READ) ||
581 !(filp->f_mode & FMODE_WRITE))
582 return -EBADF;
583
584 if (copy_from_user(&me,
585 (struct move_extent __user *)arg, sizeof(me)))
586 return -EFAULT;
587 me.moved_len = 0;
588
589 donor = fdget(me.donor_fd);
590 if (!donor.file)
591 return -EBADF;
592
593 if (!(donor.file->f_mode & FMODE_WRITE)) {
594 err = -EBADF;
595 goto mext_out;
596 }
597
598 if (ext4_has_feature_bigalloc(sb)) {
599 ext4_msg(sb, KERN_ERR,
600 "Online defrag not supported with bigalloc");
601 err = -EOPNOTSUPP;
602 goto mext_out;
603 } else if (IS_DAX(inode)) {
604 ext4_msg(sb, KERN_ERR,
605 "Online defrag not supported with DAX");
606 err = -EOPNOTSUPP;
607 goto mext_out;
608 }
609
610 err = mnt_want_write_file(filp);
611 if (err)
612 goto mext_out;
613
614 err = ext4_move_extents(filp, donor.file, me.orig_start,
615 me.donor_start, me.len, &me.moved_len);
616 mnt_drop_write_file(filp);
617
618 if (copy_to_user((struct move_extent __user *)arg,
619 &me, sizeof(me)))
620 err = -EFAULT;
621mext_out:
622 fdput(donor);
623 return err;
624 }
625
626 case EXT4_IOC_GROUP_ADD: {
627 struct ext4_new_group_data input;
628 int err, err2=0;
629
630 err = ext4_resize_begin(sb);
631 if (err)
632 return err;
633
634 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
635 sizeof(input))) {
636 err = -EFAULT;
637 goto group_add_out;
638 }
639
640 if (ext4_has_feature_bigalloc(sb)) {
641 ext4_msg(sb, KERN_ERR,
642 "Online resizing not supported with bigalloc");
643 err = -EOPNOTSUPP;
644 goto group_add_out;
645 }
646
647 err = mnt_want_write_file(filp);
648 if (err)
649 goto group_add_out;
650
651 err = ext4_group_add(sb, &input);
652 if (EXT4_SB(sb)->s_journal) {
653 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
654 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
655 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
656 }
657 if (err == 0)
658 err = err2;
659 mnt_drop_write_file(filp);
660 if (!err && ext4_has_group_desc_csum(sb) &&
661 test_opt(sb, INIT_INODE_TABLE))
662 err = ext4_register_li_request(sb, input.group);
663group_add_out:
664 ext4_resize_end(sb);
665 return err;
666 }
667
668 case EXT4_IOC_MIGRATE:
669 {
670 int err;
671 if (!inode_owner_or_capable(inode))
672 return -EACCES;
673
674 err = mnt_want_write_file(filp);
675 if (err)
676 return err;
677 /*
678 * inode_mutex prevent write and truncate on the file.
679 * Read still goes through. We take i_data_sem in
680 * ext4_ext_swap_inode_data before we switch the
681 * inode format to prevent read.
682 */
683 inode_lock((inode));
684 err = ext4_ext_migrate(inode);
685 inode_unlock((inode));
686 mnt_drop_write_file(filp);
687 return err;
688 }
689
690 case EXT4_IOC_ALLOC_DA_BLKS:
691 {
692 int err;
693 if (!inode_owner_or_capable(inode))
694 return -EACCES;
695
696 err = mnt_want_write_file(filp);
697 if (err)
698 return err;
699 err = ext4_alloc_da_blocks(inode);
700 mnt_drop_write_file(filp);
701 return err;
702 }
703
704 case EXT4_IOC_SWAP_BOOT:
705 {
706 int err;
707 if (!(filp->f_mode & FMODE_WRITE))
708 return -EBADF;
709 err = mnt_want_write_file(filp);
710 if (err)
711 return err;
712 err = swap_inode_boot_loader(sb, inode);
713 mnt_drop_write_file(filp);
714 return err;
715 }
716
717 case EXT4_IOC_RESIZE_FS: {
718 ext4_fsblk_t n_blocks_count;
719 int err = 0, err2 = 0;
720 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
721
722 if (ext4_has_feature_bigalloc(sb)) {
723 ext4_msg(sb, KERN_ERR,
724 "Online resizing not (yet) supported with bigalloc");
725 return -EOPNOTSUPP;
726 }
727
728 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
729 sizeof(__u64))) {
730 return -EFAULT;
731 }
732
733 err = ext4_resize_begin(sb);
734 if (err)
735 return err;
736
737 err = mnt_want_write_file(filp);
738 if (err)
739 goto resizefs_out;
740
741 err = ext4_resize_fs(sb, n_blocks_count);
742 if (EXT4_SB(sb)->s_journal) {
743 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
744 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
745 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
746 }
747 if (err == 0)
748 err = err2;
749 mnt_drop_write_file(filp);
750 if (!err && (o_group > EXT4_SB(sb)->s_groups_count) &&
751 ext4_has_group_desc_csum(sb) &&
752 test_opt(sb, INIT_INODE_TABLE))
753 err = ext4_register_li_request(sb, o_group);
754
755resizefs_out:
756 ext4_resize_end(sb);
757 return err;
758 }
759
760 case FITRIM:
761 {
762 struct request_queue *q = bdev_get_queue(sb->s_bdev);
763 struct fstrim_range range;
764 int ret = 0;
765
766 if (!capable(CAP_SYS_ADMIN))
767 return -EPERM;
768
769 if (!blk_queue_discard(q))
770 return -EOPNOTSUPP;
771
772 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
773 sizeof(range)))
774 return -EFAULT;
775
776 range.minlen = max((unsigned int)range.minlen,
777 q->limits.discard_granularity);
778 ret = ext4_trim_fs(sb, &range);
779 if (ret < 0)
780 return ret;
781
782 if (copy_to_user((struct fstrim_range __user *)arg, &range,
783 sizeof(range)))
784 return -EFAULT;
785
786 return 0;
787 }
788 case EXT4_IOC_PRECACHE_EXTENTS:
789 return ext4_ext_precache(inode);
790
791 case EXT4_IOC_SET_ENCRYPTION_POLICY:
792 if (!ext4_has_feature_encrypt(sb))
793 return -EOPNOTSUPP;
794 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
795
796 case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
797#ifdef CONFIG_EXT4_FS_ENCRYPTION
798 int err, err2;
799 struct ext4_sb_info *sbi = EXT4_SB(sb);
800 handle_t *handle;
801
802 if (!ext4_has_feature_encrypt(sb))
803 return -EOPNOTSUPP;
804 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
805 err = mnt_want_write_file(filp);
806 if (err)
807 return err;
808 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
809 if (IS_ERR(handle)) {
810 err = PTR_ERR(handle);
811 goto pwsalt_err_exit;
812 }
813 err = ext4_journal_get_write_access(handle, sbi->s_sbh);
814 if (err)
815 goto pwsalt_err_journal;
816 generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
817 err = ext4_handle_dirty_metadata(handle, NULL,
818 sbi->s_sbh);
819 pwsalt_err_journal:
820 err2 = ext4_journal_stop(handle);
821 if (err2 && !err)
822 err = err2;
823 pwsalt_err_exit:
824 mnt_drop_write_file(filp);
825 if (err)
826 return err;
827 }
828 if (copy_to_user((void __user *) arg,
829 sbi->s_es->s_encrypt_pw_salt, 16))
830 return -EFAULT;
831 return 0;
832#else
833 return -EOPNOTSUPP;
834#endif
835 }
836 case EXT4_IOC_GET_ENCRYPTION_POLICY:
837 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
838
839 case EXT4_IOC_FSGETXATTR:
840 {
841 struct fsxattr fa;
842
843 memset(&fa, 0, sizeof(struct fsxattr));
844 ext4_get_inode_flags(ei);
845 fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE);
846
847 if (ext4_has_feature_project(inode->i_sb)) {
848 fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
849 EXT4_I(inode)->i_projid);
850 }
851
852 if (copy_to_user((struct fsxattr __user *)arg,
853 &fa, sizeof(fa)))
854 return -EFAULT;
855 return 0;
856 }
857 case EXT4_IOC_FSSETXATTR:
858 {
859 struct fsxattr fa;
860 int err;
861
862 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
863 sizeof(fa)))
864 return -EFAULT;
865
866 /* Make sure caller has proper permission */
867 if (!inode_owner_or_capable(inode))
868 return -EACCES;
869
870 if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
871 return -EOPNOTSUPP;
872
873 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
874 if (ext4_mask_flags(inode->i_mode, flags) != flags)
875 return -EOPNOTSUPP;
876
877 err = mnt_want_write_file(filp);
878 if (err)
879 return err;
880
881 inode_lock(inode);
882 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
883 (flags & EXT4_FL_XFLAG_VISIBLE);
884 err = ext4_ioctl_setflags(inode, flags);
885 inode_unlock(inode);
886 mnt_drop_write_file(filp);
887 if (err)
888 return err;
889
890 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
891 if (err)
892 return err;
893
894 return 0;
895 }
896 default:
897 return -ENOTTY;
898 }
899}
900
901#ifdef CONFIG_COMPAT
902long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
903{
904 /* These are just misnamed, they actually get/put from/to user an int */
905 switch (cmd) {
906 case EXT4_IOC32_GETFLAGS:
907 cmd = EXT4_IOC_GETFLAGS;
908 break;
909 case EXT4_IOC32_SETFLAGS:
910 cmd = EXT4_IOC_SETFLAGS;
911 break;
912 case EXT4_IOC32_GETVERSION:
913 cmd = EXT4_IOC_GETVERSION;
914 break;
915 case EXT4_IOC32_SETVERSION:
916 cmd = EXT4_IOC_SETVERSION;
917 break;
918 case EXT4_IOC32_GROUP_EXTEND:
919 cmd = EXT4_IOC_GROUP_EXTEND;
920 break;
921 case EXT4_IOC32_GETVERSION_OLD:
922 cmd = EXT4_IOC_GETVERSION_OLD;
923 break;
924 case EXT4_IOC32_SETVERSION_OLD:
925 cmd = EXT4_IOC_SETVERSION_OLD;
926 break;
927 case EXT4_IOC32_GETRSVSZ:
928 cmd = EXT4_IOC_GETRSVSZ;
929 break;
930 case EXT4_IOC32_SETRSVSZ:
931 cmd = EXT4_IOC_SETRSVSZ;
932 break;
933 case EXT4_IOC32_GROUP_ADD: {
934 struct compat_ext4_new_group_input __user *uinput;
935 struct ext4_new_group_input input;
936 mm_segment_t old_fs;
937 int err;
938
939 uinput = compat_ptr(arg);
940 err = get_user(input.group, &uinput->group);
941 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
942 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
943 err |= get_user(input.inode_table, &uinput->inode_table);
944 err |= get_user(input.blocks_count, &uinput->blocks_count);
945 err |= get_user(input.reserved_blocks,
946 &uinput->reserved_blocks);
947 if (err)
948 return -EFAULT;
949 old_fs = get_fs();
950 set_fs(KERNEL_DS);
951 err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD,
952 (unsigned long) &input);
953 set_fs(old_fs);
954 return err;
955 }
956 case EXT4_IOC_MOVE_EXT:
957 case EXT4_IOC_RESIZE_FS:
958 case EXT4_IOC_PRECACHE_EXTENTS:
959 case EXT4_IOC_SET_ENCRYPTION_POLICY:
960 case EXT4_IOC_GET_ENCRYPTION_PWSALT:
961 case EXT4_IOC_GET_ENCRYPTION_POLICY:
962 break;
963 default:
964 return -ENOIOCTLCMD;
965 }
966 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
967}
968#endif