[net-next-2.6.git] / fs / ext4 / ioctl.c

/*
 * linux/fs/ext4/ioctl.c
 *
 * Copyright (C) 1993, 1994, 1995
 * Remy Card (card@masi.ibp.fr)
 * Laboratoire MASI - Institut Blaise Pascal
 * Universite Pierre et Marie Curie (Paris VI)
 */

#include <linux/fs.h>
#include <linux/jbd2.h>
#include <linux/capability.h>
#include <linux/ext4_fs.h>
#include <linux/ext4_jbd2.h>
#include <linux/time.h>
#include <linux/compat.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>

int ext4_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
		unsigned long arg)
{
	struct ext4_inode_info *ei = EXT4_I(inode);
	unsigned int flags;
	unsigned short rsv_window_size;

	ext4_debug ("cmd = %u, arg = %lu\n", cmd, arg);

	switch (cmd) {
	case EXT4_IOC_GETFLAGS:
		flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
		return put_user(flags, (int __user *) arg);
	case EXT4_IOC_SETFLAGS: {
		handle_t *handle = NULL;
		int err;
		struct ext4_iloc iloc;
		unsigned int oldflags;
		unsigned int jflag;

		if (IS_RDONLY(inode))
			return -EROFS;

		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
			return -EACCES;

		if (get_user(flags, (int __user *) arg))
			return -EFAULT;

		if (!S_ISDIR(inode->i_mode))
			flags &= ~EXT4_DIRSYNC_FL;

		mutex_lock(&inode->i_mutex);
		oldflags = ei->i_flags;

		/* The JOURNAL_DATA flag is modifiable only by root */
		jflag = flags & EXT4_JOURNAL_DATA_FL;

		/*
		 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
		 * the relevant capability.
		 *
		 * This test looks nicer. Thanks to Pauline Middelink
		 */
		if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
			if (!capable(CAP_LINUX_IMMUTABLE)) {
				mutex_unlock(&inode->i_mutex);
				return -EPERM;
			}
		}

		/*
		 * The JOURNAL_DATA flag can only be changed by
		 * the relevant capability.
		 */
		if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
			if (!capable(CAP_SYS_RESOURCE)) {
				mutex_unlock(&inode->i_mutex);
				return -EPERM;
			}
		}


		handle = ext4_journal_start(inode, 1);
		if (IS_ERR(handle)) {
			mutex_unlock(&inode->i_mutex);
			return PTR_ERR(handle);
		}
		if (IS_SYNC(inode))
			handle->h_sync = 1;
		err = ext4_reserve_inode_write(handle, inode, &iloc);
		if (err)
			goto flags_err;

		flags = flags & EXT4_FL_USER_MODIFIABLE;
		flags |= oldflags & ~EXT4_FL_USER_MODIFIABLE;
		ei->i_flags = flags;

		ext4_set_inode_flags(inode);
		inode->i_ctime = CURRENT_TIME_SEC;

		err = ext4_mark_iloc_dirty(handle, inode, &iloc);
flags_err:
		ext4_journal_stop(handle);
		if (err) {
			mutex_unlock(&inode->i_mutex);
			return err;
		}

		if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
			err = ext4_change_inode_journal_flag(inode, jflag);
		mutex_unlock(&inode->i_mutex);
		return err;
	}
	case EXT4_IOC_GETVERSION:
	case EXT4_IOC_GETVERSION_OLD:
		return put_user(inode->i_generation, (int __user *) arg);
	case EXT4_IOC_SETVERSION:
	case EXT4_IOC_SETVERSION_OLD: {
		handle_t *handle;
		struct ext4_iloc iloc;
		__u32 generation;
		int err;

		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
			return -EPERM;
		if (IS_RDONLY(inode))
			return -EROFS;
		if (get_user(generation, (int __user *) arg))
			return -EFAULT;

		handle = ext4_journal_start(inode, 1);
		if (IS_ERR(handle))
			return PTR_ERR(handle);
		err = ext4_reserve_inode_write(handle, inode, &iloc);
		if (err == 0) {
			inode->i_ctime = CURRENT_TIME_SEC;
			inode->i_generation = generation;
			err = ext4_mark_iloc_dirty(handle, inode, &iloc);
		}
		ext4_journal_stop(handle);
		return err;
	}
#ifdef CONFIG_JBD_DEBUG
	case EXT4_IOC_WAIT_FOR_READONLY:
		/*
		 * This is racy - by the time we're woken up and running,
		 * the superblock could be released.  And the module could
		 * have been unloaded.  So sue me.
		 *
		 * Returns 1 if it slept, else zero.
		 */
		{
			struct super_block *sb = inode->i_sb;
			DECLARE_WAITQUEUE(wait, current);
			int ret = 0;

			set_current_state(TASK_INTERRUPTIBLE);
			add_wait_queue(&EXT4_SB(sb)->ro_wait_queue, &wait);
			if (timer_pending(&EXT4_SB(sb)->turn_ro_timer)) {
				schedule();
				ret = 1;
			}
			remove_wait_queue(&EXT4_SB(sb)->ro_wait_queue, &wait);
			return ret;
		}
#endif
	case EXT4_IOC_GETRSVSZ:
		if (test_opt(inode->i_sb, RESERVATION)
			&& S_ISREG(inode->i_mode)
			&& ei->i_block_alloc_info) {
			rsv_window_size = ei->i_block_alloc_info->rsv_window_node.rsv_goal_size;
			return put_user(rsv_window_size, (int __user *)arg);
		}
		return -ENOTTY;
	case EXT4_IOC_SETRSVSZ: {

		if (!test_opt(inode->i_sb, RESERVATION) ||!S_ISREG(inode->i_mode))
			return -ENOTTY;

		if (IS_RDONLY(inode))
			return -EROFS;

		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
			return -EACCES;

		if (get_user(rsv_window_size, (int __user *)arg))
			return -EFAULT;

		if (rsv_window_size > EXT4_MAX_RESERVE_BLOCKS)
			rsv_window_size = EXT4_MAX_RESERVE_BLOCKS;

		/*
		 * need to allocate reservation structure for this inode
		 * before set the window size
		 */
		mutex_lock(&ei->truncate_mutex);
		if (!ei->i_block_alloc_info)
			ext4_init_block_alloc_info(inode);

		if (ei->i_block_alloc_info){
			struct ext4_reserve_window_node *rsv = &ei->i_block_alloc_info->rsv_window_node;
			rsv->rsv_goal_size = rsv_window_size;
		}
		mutex_unlock(&ei->truncate_mutex);
		return 0;
	}
	case EXT4_IOC_GROUP_EXTEND: {
		ext4_fsblk_t n_blocks_count;
		struct super_block *sb = inode->i_sb;
		int err;

		if (!capable(CAP_SYS_RESOURCE))
			return -EPERM;

		if (IS_RDONLY(inode))
			return -EROFS;

		if (get_user(n_blocks_count, (__u32 __user *)arg))
			return -EFAULT;

		err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
		jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
		jbd2_journal_flush(EXT4_SB(sb)->s_journal);
		jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);

		return err;
	}
	case EXT4_IOC_GROUP_ADD: {
		struct ext4_new_group_data input;
		struct super_block *sb = inode->i_sb;
		int err;

		if (!capable(CAP_SYS_RESOURCE))
			return -EPERM;

		if (IS_RDONLY(inode))
			return -EROFS;

		if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
				sizeof(input)))
			return -EFAULT;

		err = ext4_group_add(sb, &input);
		jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
		jbd2_journal_flush(EXT4_SB(sb)->s_journal);
		jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);

		return err;
	}

	default:
		return -ENOTTY;
	}
}

#ifdef CONFIG_COMPAT
long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	struct inode *inode = file->f_path.dentry->d_inode;
	int ret;

	/* These are just misnamed, they actually get/put from/to user an int */
	switch (cmd) {
	case EXT4_IOC32_GETFLAGS:
		cmd = EXT4_IOC_GETFLAGS;
		break;
	case EXT4_IOC32_SETFLAGS:
		cmd = EXT4_IOC_SETFLAGS;
		break;
	case EXT4_IOC32_GETVERSION:
		cmd = EXT4_IOC_GETVERSION;
		break;
	case EXT4_IOC32_SETVERSION:
		cmd = EXT4_IOC_SETVERSION;
		break;
	case EXT4_IOC32_GROUP_EXTEND:
		cmd = EXT4_IOC_GROUP_EXTEND;
		break;
	case EXT4_IOC32_GETVERSION_OLD:
		cmd = EXT4_IOC_GETVERSION_OLD;
		break;
	case EXT4_IOC32_SETVERSION_OLD:
		cmd = EXT4_IOC_SETVERSION_OLD;
		break;
#ifdef CONFIG_JBD_DEBUG
	case EXT4_IOC32_WAIT_FOR_READONLY:
		cmd = EXT4_IOC_WAIT_FOR_READONLY;
		break;
#endif
	case EXT4_IOC32_GETRSVSZ:
		cmd = EXT4_IOC_GETRSVSZ;
		break;
	case EXT4_IOC32_SETRSVSZ:
		cmd = EXT4_IOC_SETRSVSZ;
		break;
	case EXT4_IOC_GROUP_ADD:
		break;
	default:
		return -ENOIOCTLCMD;
	}
	lock_kernel();
	ret = ext4_ioctl(inode, file, cmd, (unsigned long) compat_ptr(arg));
	unlock_kernel();
	return ret;
}
#endif
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>
617ba13b	13	#include <linux/ext4_fs.h>
dab291af	14	#include <linux/ext4_jbd2.h>
ac27a0ec DK	15	#include <linux/time.h>
	16	#include <linux/compat.h>
	17	#include <linux/smp_lock.h>
	18	#include <asm/uaccess.h>
	19
617ba13b	20	int ext4_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
ac27a0ec DK	21	unsigned long arg)
ac27a0ec DK	22	{
617ba13b	23	struct ext4_inode_info *ei = EXT4_I(inode);
ac27a0ec DK	24	unsigned int flags;
	25	unsigned short rsv_window_size;
	26
617ba13b	27	ext4_debug ("cmd = %u, arg = %lu\n", cmd, arg);
ac27a0ec DK	28
ac27a0ec DK	29	switch (cmd) {
617ba13b MC	30	case EXT4_IOC_GETFLAGS:
617ba13b MC	31	flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
ac27a0ec	32	return put_user(flags, (int __user *) arg);
617ba13b	33	case EXT4_IOC_SETFLAGS: {
ac27a0ec DK	34	handle_t *handle = NULL;
ac27a0ec DK	35	int err;
617ba13b	36	struct ext4_iloc iloc;
ac27a0ec DK	37	unsigned int oldflags;
	38	unsigned int jflag;
	39
	40	if (IS_RDONLY(inode))
	41	return -EROFS;
	42
	43	if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
	44	return -EACCES;
	45
	46	if (get_user(flags, (int __user *) arg))
	47	return -EFAULT;
	48
	49	if (!S_ISDIR(inode->i_mode))
617ba13b	50	flags &= ~EXT4_DIRSYNC_FL;
ac27a0ec DK	51
	52	mutex_lock(&inode->i_mutex);
	53	oldflags = ei->i_flags;
	54
	55	/* The JOURNAL_DATA flag is modifiable only by root */
617ba13b	56	jflag = flags & EXT4_JOURNAL_DATA_FL;
ac27a0ec DK	57
	58	/*
	59	* The IMMUTABLE and APPEND_ONLY flags can only be changed by
	60	* the relevant capability.
	61	*
	62	* This test looks nicer. Thanks to Pauline Middelink
	63	*/
617ba13b	64	if ((flags ^ oldflags) & (EXT4_APPEND_FL \| EXT4_IMMUTABLE_FL)) {
ac27a0ec DK	65	if (!capable(CAP_LINUX_IMMUTABLE)) {
	66	mutex_unlock(&inode->i_mutex);
	67	return -EPERM;
	68	}
	69	}
	70
	71	/*
	72	* The JOURNAL_DATA flag can only be changed by
	73	* the relevant capability.
	74	*/
617ba13b	75	if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
ac27a0ec DK	76	if (!capable(CAP_SYS_RESOURCE)) {
	77	mutex_unlock(&inode->i_mutex);
	78	return -EPERM;
	79	}
	80	}
	81
	82
617ba13b	83	handle = ext4_journal_start(inode, 1);
ac27a0ec DK	84	if (IS_ERR(handle)) {
	85	mutex_unlock(&inode->i_mutex);
	86	return PTR_ERR(handle);
	87	}
	88	if (IS_SYNC(inode))
	89	handle->h_sync = 1;
617ba13b	90	err = ext4_reserve_inode_write(handle, inode, &iloc);
ac27a0ec DK	91	if (err)
	92	goto flags_err;
	93
617ba13b MC	94	flags = flags & EXT4_FL_USER_MODIFIABLE;
617ba13b MC	95	flags \|= oldflags & ~EXT4_FL_USER_MODIFIABLE;
ac27a0ec DK	96	ei->i_flags = flags;
ac27a0ec DK	97
617ba13b	98	ext4_set_inode_flags(inode);
ac27a0ec DK	99	inode->i_ctime = CURRENT_TIME_SEC;
ac27a0ec DK	100
617ba13b	101	err = ext4_mark_iloc_dirty(handle, inode, &iloc);
ac27a0ec	102	flags_err:
617ba13b	103	ext4_journal_stop(handle);
ac27a0ec DK	104	if (err) {
	105	mutex_unlock(&inode->i_mutex);
	106	return err;
	107	}
	108
617ba13b MC	109	if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
617ba13b MC	110	err = ext4_change_inode_journal_flag(inode, jflag);
ac27a0ec DK	111	mutex_unlock(&inode->i_mutex);
	112	return err;
	113	}
617ba13b MC	114	case EXT4_IOC_GETVERSION:
617ba13b MC	115	case EXT4_IOC_GETVERSION_OLD:
ac27a0ec	116	return put_user(inode->i_generation, (int __user *) arg);
617ba13b MC	117	case EXT4_IOC_SETVERSION:
617ba13b MC	118	case EXT4_IOC_SETVERSION_OLD: {
ac27a0ec	119	handle_t *handle;
617ba13b	120	struct ext4_iloc iloc;
ac27a0ec DK	121	__u32 generation;
	122	int err;
	123
	124	if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
	125	return -EPERM;
	126	if (IS_RDONLY(inode))
	127	return -EROFS;
	128	if (get_user(generation, (int __user *) arg))
	129	return -EFAULT;
	130
617ba13b	131	handle = ext4_journal_start(inode, 1);
ac27a0ec DK	132	if (IS_ERR(handle))
ac27a0ec DK	133	return PTR_ERR(handle);
617ba13b	134	err = ext4_reserve_inode_write(handle, inode, &iloc);
ac27a0ec DK	135	if (err == 0) {
	136	inode->i_ctime = CURRENT_TIME_SEC;
	137	inode->i_generation = generation;
617ba13b	138	err = ext4_mark_iloc_dirty(handle, inode, &iloc);
ac27a0ec	139	}
617ba13b	140	ext4_journal_stop(handle);
ac27a0ec DK	141	return err;
	142	}
	143	#ifdef CONFIG_JBD_DEBUG
617ba13b	144	case EXT4_IOC_WAIT_FOR_READONLY:
ac27a0ec DK	145	/*
	146	* This is racy - by the time we're woken up and running,
	147	* the superblock could be released. And the module could
	148	* have been unloaded. So sue me.
	149	*
	150	* Returns 1 if it slept, else zero.
	151	*/
	152	{
	153	struct super_block *sb = inode->i_sb;
	154	DECLARE_WAITQUEUE(wait, current);
	155	int ret = 0;
	156
	157	set_current_state(TASK_INTERRUPTIBLE);
617ba13b MC	158	add_wait_queue(&EXT4_SB(sb)->ro_wait_queue, &wait);
617ba13b MC	159	if (timer_pending(&EXT4_SB(sb)->turn_ro_timer)) {
ac27a0ec DK	160	schedule();
	161	ret = 1;
	162	}
617ba13b	163	remove_wait_queue(&EXT4_SB(sb)->ro_wait_queue, &wait);
ac27a0ec DK	164	return ret;
	165	}
	166	#endif
617ba13b	167	case EXT4_IOC_GETRSVSZ:
ac27a0ec DK	168	if (test_opt(inode->i_sb, RESERVATION)
	169	&& S_ISREG(inode->i_mode)
	170	&& ei->i_block_alloc_info) {
	171	rsv_window_size = ei->i_block_alloc_info->rsv_window_node.rsv_goal_size;
	172	return put_user(rsv_window_size, (int __user *)arg);
	173	}
	174	return -ENOTTY;
617ba13b	175	case EXT4_IOC_SETRSVSZ: {
ac27a0ec DK	176
	177	if (!test_opt(inode->i_sb, RESERVATION) \|\|!S_ISREG(inode->i_mode))
	178	return -ENOTTY;
	179
	180	if (IS_RDONLY(inode))
	181	return -EROFS;
	182
	183	if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
	184	return -EACCES;
	185
	186	if (get_user(rsv_window_size, (int __user *)arg))
	187	return -EFAULT;
	188
617ba13b MC	189	if (rsv_window_size > EXT4_MAX_RESERVE_BLOCKS)
617ba13b MC	190	rsv_window_size = EXT4_MAX_RESERVE_BLOCKS;
ac27a0ec DK	191
	192	/*
	193	* need to allocate reservation structure for this inode
	194	* before set the window size
	195	*/
	196	mutex_lock(&ei->truncate_mutex);
	197	if (!ei->i_block_alloc_info)
617ba13b	198	ext4_init_block_alloc_info(inode);
ac27a0ec DK	199
ac27a0ec DK	200	if (ei->i_block_alloc_info){
617ba13b	201	struct ext4_reserve_window_node *rsv = &ei->i_block_alloc_info->rsv_window_node;
ac27a0ec DK	202	rsv->rsv_goal_size = rsv_window_size;
	203	}
	204	mutex_unlock(&ei->truncate_mutex);
	205	return 0;
	206	}
617ba13b MC	207	case EXT4_IOC_GROUP_EXTEND: {
617ba13b MC	208	ext4_fsblk_t n_blocks_count;
ac27a0ec DK	209	struct super_block *sb = inode->i_sb;
	210	int err;
	211
	212	if (!capable(CAP_SYS_RESOURCE))
	213	return -EPERM;
	214
	215	if (IS_RDONLY(inode))
	216	return -EROFS;
	217
	218	if (get_user(n_blocks_count, (__u32 __user *)arg))
	219	return -EFAULT;
	220
617ba13b	221	err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
dab291af MC	222	jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
	223	jbd2_journal_flush(EXT4_SB(sb)->s_journal);
	224	jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
ac27a0ec DK	225
	226	return err;
	227	}
617ba13b MC	228	case EXT4_IOC_GROUP_ADD: {
617ba13b MC	229	struct ext4_new_group_data input;
ac27a0ec DK	230	struct super_block *sb = inode->i_sb;
	231	int err;
	232
	233	if (!capable(CAP_SYS_RESOURCE))
	234	return -EPERM;
	235
	236	if (IS_RDONLY(inode))
	237	return -EROFS;
	238
617ba13b	239	if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
ac27a0ec DK	240	sizeof(input)))
	241	return -EFAULT;
	242
617ba13b	243	err = ext4_group_add(sb, &input);
dab291af MC	244	jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
	245	jbd2_journal_flush(EXT4_SB(sb)->s_journal);
	246	jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
ac27a0ec DK	247
	248	return err;
	249	}
	250
ac27a0ec DK	251	default:
	252	return -ENOTTY;
	253	}
	254	}
	255
	256	#ifdef CONFIG_COMPAT
617ba13b	257	long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
ac27a0ec	258	{
9d549890	259	struct inode *inode = file->f_path.dentry->d_inode;
ac27a0ec DK	260	int ret;
	261
	262	/* These are just misnamed, they actually get/put from/to user an int */
	263	switch (cmd) {
617ba13b MC	264	case EXT4_IOC32_GETFLAGS:
617ba13b MC	265	cmd = EXT4_IOC_GETFLAGS;
ac27a0ec	266	break;
617ba13b MC	267	case EXT4_IOC32_SETFLAGS:
617ba13b MC	268	cmd = EXT4_IOC_SETFLAGS;
ac27a0ec	269	break;
617ba13b MC	270	case EXT4_IOC32_GETVERSION:
617ba13b MC	271	cmd = EXT4_IOC_GETVERSION;
ac27a0ec	272	break;
617ba13b MC	273	case EXT4_IOC32_SETVERSION:
617ba13b MC	274	cmd = EXT4_IOC_SETVERSION;
ac27a0ec	275	break;
617ba13b MC	276	case EXT4_IOC32_GROUP_EXTEND:
617ba13b MC	277	cmd = EXT4_IOC_GROUP_EXTEND;
ac27a0ec	278	break;
617ba13b MC	279	case EXT4_IOC32_GETVERSION_OLD:
617ba13b MC	280	cmd = EXT4_IOC_GETVERSION_OLD;
ac27a0ec	281	break;
617ba13b MC	282	case EXT4_IOC32_SETVERSION_OLD:
617ba13b MC	283	cmd = EXT4_IOC_SETVERSION_OLD;
ac27a0ec DK	284	break;
ac27a0ec DK	285	#ifdef CONFIG_JBD_DEBUG
617ba13b MC	286	case EXT4_IOC32_WAIT_FOR_READONLY:
617ba13b MC	287	cmd = EXT4_IOC_WAIT_FOR_READONLY;
ac27a0ec DK	288	break;
ac27a0ec DK	289	#endif
617ba13b MC	290	case EXT4_IOC32_GETRSVSZ:
617ba13b MC	291	cmd = EXT4_IOC_GETRSVSZ;
ac27a0ec	292	break;
617ba13b MC	293	case EXT4_IOC32_SETRSVSZ:
617ba13b MC	294	cmd = EXT4_IOC_SETRSVSZ;
ac27a0ec	295	break;
617ba13b	296	case EXT4_IOC_GROUP_ADD:
ac27a0ec DK	297	break;
	298	default:
	299	return -ENOIOCTLCMD;
	300	}
	301	lock_kernel();
617ba13b	302	ret = ext4_ioctl(inode, file, cmd, (unsigned long) compat_ptr(arg));
ac27a0ec DK	303	unlock_kernel();
	304	return ret;
	305	}
	306	#endif