[linux-2.6-block.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/time.h>
#include <linux/compat.h>
#include <linux/mount.h>
#include <linux/file.h>
#include <asm/uaccess.h>
#include "ext4_jbd2.h"
#include "ext4.h"

long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
	struct inode *inode = filp->f_dentry->d_inode;
	struct super_block *sb = inode->i_sb;
	struct ext4_inode_info *ei = EXT4_I(inode);
	unsigned int flags;

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

	switch (cmd) {
	case EXT4_IOC_GETFLAGS:
		ext4_get_inode_flags(ei);
		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, migrate = 0;
		struct ext4_iloc iloc;
		unsigned int oldflags;
		unsigned int jflag;

		if (!inode_owner_or_capable(inode))
			return -EACCES;

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

		err = mnt_want_write(filp->f_path.mnt);
		if (err)
			return err;

		flags = ext4_mask_flags(inode->i_mode, flags);

		err = -EPERM;
		mutex_lock(&inode->i_mutex);
		/* Is it quota file? Do not allow user to mess with it */
		if (IS_NOQUOTA(inode))
			goto flags_out;

		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))
				goto flags_out;
		}

		/*
		 * The JOURNAL_DATA flag can only be changed by
		 * the relevant capability.
		 */
		if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
			if (!capable(CAP_SYS_RESOURCE))
				goto flags_out;
		}
		if (oldflags & EXT4_EXTENTS_FL) {
			/* We don't support clearning extent flags */
			if (!(flags & EXT4_EXTENTS_FL)) {
				err = -EOPNOTSUPP;
				goto flags_out;
			}
		} else if (flags & EXT4_EXTENTS_FL) {
			/* migrate the file */
			migrate = 1;
			flags &= ~EXT4_EXTENTS_FL;
		}

		if (flags & EXT4_EOFBLOCKS_FL) {
			/* we don't support adding EOFBLOCKS flag */
			if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
				err = -EOPNOTSUPP;
				goto flags_out;
			}
		} else if (oldflags & EXT4_EOFBLOCKS_FL)
			ext4_truncate(inode);

		handle = ext4_journal_start(inode, 1);
		if (IS_ERR(handle)) {
			err = PTR_ERR(handle);
			goto flags_out;
		}
		if (IS_SYNC(inode))
			ext4_handle_sync(handle);
		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 = ext4_current_time(inode);

		err = ext4_mark_iloc_dirty(handle, inode, &iloc);
flags_err:
		ext4_journal_stop(handle);
		if (err)
			goto flags_out;

		if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
			err = ext4_change_inode_journal_flag(inode, jflag);
		if (err)
			goto flags_out;
		if (migrate)
			err = ext4_ext_migrate(inode);
flags_out:
		mutex_unlock(&inode->i_mutex);
		mnt_drop_write(filp->f_path.mnt);
		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 (!inode_owner_or_capable(inode))
			return -EPERM;

		err = mnt_want_write(filp->f_path.mnt);
		if (err)
			return err;
		if (get_user(generation, (int __user *) arg)) {
			err = -EFAULT;
			goto setversion_out;
		}

		handle = ext4_journal_start(inode, 1);
		if (IS_ERR(handle)) {
			err = PTR_ERR(handle);
			goto setversion_out;
		}
		err = ext4_reserve_inode_write(handle, inode, &iloc);
		if (err == 0) {
			inode->i_ctime = ext4_current_time(inode);
			inode->i_generation = generation;
			err = ext4_mark_iloc_dirty(handle, inode, &iloc);
		}
		ext4_journal_stop(handle);
setversion_out:
		mnt_drop_write(filp->f_path.mnt);
		return err;
	}
	case EXT4_IOC_GROUP_EXTEND: {
		ext4_fsblk_t n_blocks_count;
		int err, err2=0;

		err = ext4_resize_begin(sb);
		if (err)
			return err;

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

		if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
			       EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
			ext4_msg(sb, KERN_ERR,
				 "Online resizing not supported with bigalloc");
			return -EOPNOTSUPP;
		}

		err = mnt_want_write(filp->f_path.mnt);
		if (err)
			return err;

		err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
		if (EXT4_SB(sb)->s_journal) {
			jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
			err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
			jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
		}
		if (err == 0)
			err = err2;
		mnt_drop_write(filp->f_path.mnt);
		ext4_resize_end(sb);

		return err;
	}

	case EXT4_IOC_MOVE_EXT: {
		struct move_extent me;
		struct file *donor_filp;
		int err;

		if (!(filp->f_mode & FMODE_READ) ||
		    !(filp->f_mode & FMODE_WRITE))
			return -EBADF;

		if (copy_from_user(&me,
			(struct move_extent __user *)arg, sizeof(me)))
			return -EFAULT;
		me.moved_len = 0;

		donor_filp = fget(me.donor_fd);
		if (!donor_filp)
			return -EBADF;

		if (!(donor_filp->f_mode & FMODE_WRITE)) {
			err = -EBADF;
			goto mext_out;
		}

		if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
			       EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
			ext4_msg(sb, KERN_ERR,
				 "Online defrag not supported with bigalloc");
			return -EOPNOTSUPP;
		}

		err = mnt_want_write(filp->f_path.mnt);
		if (err)
			goto mext_out;

		err = ext4_move_extents(filp, donor_filp, me.orig_start,
					me.donor_start, me.len, &me.moved_len);
		mnt_drop_write(filp->f_path.mnt);
		if (me.moved_len > 0)
			file_remove_suid(donor_filp);

		if (copy_to_user((struct move_extent __user *)arg,
				 &me, sizeof(me)))
			err = -EFAULT;
mext_out:
		fput(donor_filp);
		return err;
	}

	case EXT4_IOC_GROUP_ADD: {
		struct ext4_new_group_data input;
		int err, err2=0;

		err = ext4_resize_begin(sb);
		if (err)
			return err;

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

		if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
			       EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
			ext4_msg(sb, KERN_ERR,
				 "Online resizing not supported with bigalloc");
			return -EOPNOTSUPP;
		}

		err = mnt_want_write(filp->f_path.mnt);
		if (err)
			return err;

		err = ext4_group_add(sb, &input);
		if (EXT4_SB(sb)->s_journal) {
			jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
			err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
			jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
		}
		if (err == 0)
			err = err2;
		mnt_drop_write(filp->f_path.mnt);
		ext4_resize_end(sb);

		return err;
	}

	case EXT4_IOC_MIGRATE:
	{
		int err;
		if (!inode_owner_or_capable(inode))
			return -EACCES;

		err = mnt_want_write(filp->f_path.mnt);
		if (err)
			return err;
		/*
		 * inode_mutex prevent write and truncate on the file.
		 * Read still goes through. We take i_data_sem in
		 * ext4_ext_swap_inode_data before we switch the
		 * inode format to prevent read.
		 */
		mutex_lock(&(inode->i_mutex));
		err = ext4_ext_migrate(inode);
		mutex_unlock(&(inode->i_mutex));
		mnt_drop_write(filp->f_path.mnt);
		return err;
	}

	case EXT4_IOC_ALLOC_DA_BLKS:
	{
		int err;
		if (!inode_owner_or_capable(inode))
			return -EACCES;

		err = mnt_want_write(filp->f_path.mnt);
		if (err)
			return err;
		err = ext4_alloc_da_blocks(inode);
		mnt_drop_write(filp->f_path.mnt);
		return err;
	}

	case FITRIM:
	{
		struct request_queue *q = bdev_get_queue(sb->s_bdev);
		struct fstrim_range range;
		int ret = 0;

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

		if (!blk_queue_discard(q))
			return -EOPNOTSUPP;

		if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
			       EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
			ext4_msg(sb, KERN_ERR,
				 "FITRIM not supported with bigalloc");
			return -EOPNOTSUPP;
		}

		if (copy_from_user(&range, (struct fstrim_range *)arg,
		    sizeof(range)))
			return -EFAULT;

		range.minlen = max((unsigned int)range.minlen,
				   q->limits.discard_granularity);
		ret = ext4_trim_fs(sb, &range);
		if (ret < 0)
			return ret;

		if (copy_to_user((struct fstrim_range *)arg, &range,
		    sizeof(range)))
			return -EFAULT;

		return 0;
	}

	default:
		return -ENOTTY;
	}
}

#ifdef CONFIG_COMPAT
long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	/* 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;
	case EXT4_IOC32_GETRSVSZ:
		cmd = EXT4_IOC_GETRSVSZ;
		break;
	case EXT4_IOC32_SETRSVSZ:
		cmd = EXT4_IOC_SETRSVSZ;
		break;
	case EXT4_IOC32_GROUP_ADD: {
		struct compat_ext4_new_group_input __user *uinput;
		struct ext4_new_group_input input;
		mm_segment_t old_fs;
		int err;

		uinput = compat_ptr(arg);
		err = get_user(input.group, &uinput->group);
		err |= get_user(input.block_bitmap, &uinput->block_bitmap);
		err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
		err |= get_user(input.inode_table, &uinput->inode_table);
		err |= get_user(input.blocks_count, &uinput->blocks_count);
		err |= get_user(input.reserved_blocks,
				&uinput->reserved_blocks);
		if (err)
			return -EFAULT;
		old_fs = get_fs();
		set_fs(KERNEL_DS);
		err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD,
				 (unsigned long) &input);
		set_fs(old_fs);
		return err;
	}
	case EXT4_IOC_MOVE_EXT:
	case FITRIM:
		break;
	default:
		return -ENOIOCTLCMD;
	}
	return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
}
#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>
ac27a0ec DK	13	#include <linux/time.h>
ac27a0ec DK	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"
3dcf5451 CH	19	#include "ext4.h"
ac27a0ec	20
5cdd7b2d	21	long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
ac27a0ec	22	{
5cdd7b2d	23	struct inode *inode = filp->f_dentry->d_inode;
bab08ab9	24	struct super_block *sb = inode->i_sb;
617ba13b	25	struct ext4_inode_info *ei = EXT4_I(inode);
ac27a0ec	26	unsigned int flags;
ac27a0ec	27
af5bc92d	28	ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
ac27a0ec DK	29
ac27a0ec DK	30	switch (cmd) {
617ba13b	31	case EXT4_IOC_GETFLAGS:
ff9ddf7e	32	ext4_get_inode_flags(ei);
617ba13b	33	flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
ac27a0ec	34	return put_user(flags, (int __user *) arg);
617ba13b	35	case EXT4_IOC_SETFLAGS: {
ac27a0ec	36	handle_t *handle = NULL;
4db46fc2	37	int err, migrate = 0;
617ba13b	38	struct ext4_iloc iloc;
ac27a0ec DK	39	unsigned int oldflags;
	40	unsigned int jflag;
	41
2e149670	42	if (!inode_owner_or_capable(inode))
ac27a0ec DK	43	return -EACCES;
	44
	45	if (get_user(flags, (int __user *) arg))
	46	return -EFAULT;
	47
42a74f20 DH	48	err = mnt_want_write(filp->f_path.mnt);
	49	if (err)
	50	return err;
	51
2dc6b0d4	52	flags = ext4_mask_flags(inode->i_mode, flags);
ac27a0ec	53
42a74f20	54	err = -EPERM;
ac27a0ec	55	mutex_lock(&inode->i_mutex);
e47776a0	56	/* Is it quota file? Do not allow user to mess with it */
42a74f20 DH	57	if (IS_NOQUOTA(inode))
	58	goto flags_out;
	59
ac27a0ec DK	60	oldflags = ei->i_flags;
	61
	62	/* The JOURNAL_DATA flag is modifiable only by root */
617ba13b	63	jflag = flags & EXT4_JOURNAL_DATA_FL;
ac27a0ec DK	64
	65	/*
	66	* The IMMUTABLE and APPEND_ONLY flags can only be changed by
	67	* the relevant capability.
	68	*
	69	* This test looks nicer. Thanks to Pauline Middelink
	70	*/
617ba13b	71	if ((flags ^ oldflags) & (EXT4_APPEND_FL \| EXT4_IMMUTABLE_FL)) {
42a74f20 DH	72	if (!capable(CAP_LINUX_IMMUTABLE))
42a74f20 DH	73	goto flags_out;
ac27a0ec DK	74	}
	75
	76	/*
	77	* The JOURNAL_DATA flag can only be changed by
	78	* the relevant capability.
	79	*/
617ba13b	80	if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
42a74f20 DH	81	if (!capable(CAP_SYS_RESOURCE))
42a74f20 DH	82	goto flags_out;
ac27a0ec	83	}
4db46fc2 AK	84	if (oldflags & EXT4_EXTENTS_FL) {
	85	/* We don't support clearning extent flags */
	86	if (!(flags & EXT4_EXTENTS_FL)) {
	87	err = -EOPNOTSUPP;
	88	goto flags_out;
	89	}
	90	} else if (flags & EXT4_EXTENTS_FL) {
	91	/* migrate the file */
	92	migrate = 1;
	93	flags &= ~EXT4_EXTENTS_FL;
	94	}
ac27a0ec	95
c8d46e41 JZ	96	if (flags & EXT4_EOFBLOCKS_FL) {
	97	/* we don't support adding EOFBLOCKS flag */
	98	if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
	99	err = -EOPNOTSUPP;
	100	goto flags_out;
	101	}
	102	} else if (oldflags & EXT4_EOFBLOCKS_FL)
	103	ext4_truncate(inode);
	104
617ba13b	105	handle = ext4_journal_start(inode, 1);
ac27a0ec	106	if (IS_ERR(handle)) {
42a74f20 DH	107	err = PTR_ERR(handle);
42a74f20 DH	108	goto flags_out;
ac27a0ec DK	109	}
ac27a0ec DK	110	if (IS_SYNC(inode))
0390131b	111	ext4_handle_sync(handle);
617ba13b	112	err = ext4_reserve_inode_write(handle, inode, &iloc);
ac27a0ec DK	113	if (err)
	114	goto flags_err;
	115
617ba13b MC	116	flags = flags & EXT4_FL_USER_MODIFIABLE;
617ba13b MC	117	flags \|= oldflags & ~EXT4_FL_USER_MODIFIABLE;
ac27a0ec DK	118	ei->i_flags = flags;
ac27a0ec DK	119
617ba13b	120	ext4_set_inode_flags(inode);
ef7f3835	121	inode->i_ctime = ext4_current_time(inode);
ac27a0ec	122
617ba13b	123	err = ext4_mark_iloc_dirty(handle, inode, &iloc);
ac27a0ec	124	flags_err:
617ba13b	125	ext4_journal_stop(handle);
42a74f20 DH	126	if (err)
42a74f20 DH	127	goto flags_out;
ac27a0ec	128
617ba13b MC	129	if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
617ba13b MC	130	err = ext4_change_inode_journal_flag(inode, jflag);
4db46fc2 AK	131	if (err)
	132	goto flags_out;
	133	if (migrate)
	134	err = ext4_ext_migrate(inode);
42a74f20	135	flags_out:
ac27a0ec	136	mutex_unlock(&inode->i_mutex);
42a74f20	137	mnt_drop_write(filp->f_path.mnt);
ac27a0ec DK	138	return err;
ac27a0ec DK	139	}
617ba13b MC	140	case EXT4_IOC_GETVERSION:
617ba13b MC	141	case EXT4_IOC_GETVERSION_OLD:
ac27a0ec	142	return put_user(inode->i_generation, (int __user *) arg);
617ba13b MC	143	case EXT4_IOC_SETVERSION:
617ba13b MC	144	case EXT4_IOC_SETVERSION_OLD: {
ac27a0ec	145	handle_t *handle;
617ba13b	146	struct ext4_iloc iloc;
ac27a0ec DK	147	__u32 generation;
	148	int err;
	149
2e149670	150	if (!inode_owner_or_capable(inode))
ac27a0ec	151	return -EPERM;
42a74f20 DH	152
	153	err = mnt_want_write(filp->f_path.mnt);
	154	if (err)
	155	return err;
	156	if (get_user(generation, (int __user *) arg)) {
	157	err = -EFAULT;
	158	goto setversion_out;
	159	}
ac27a0ec	160
617ba13b	161	handle = ext4_journal_start(inode, 1);
42a74f20 DH	162	if (IS_ERR(handle)) {
	163	err = PTR_ERR(handle);
	164	goto setversion_out;
	165	}
617ba13b	166	err = ext4_reserve_inode_write(handle, inode, &iloc);
ac27a0ec	167	if (err == 0) {
ef7f3835	168	inode->i_ctime = ext4_current_time(inode);
ac27a0ec	169	inode->i_generation = generation;
617ba13b	170	err = ext4_mark_iloc_dirty(handle, inode, &iloc);
ac27a0ec	171	}
617ba13b	172	ext4_journal_stop(handle);
42a74f20 DH	173	setversion_out:
42a74f20 DH	174	mnt_drop_write(filp->f_path.mnt);
ac27a0ec DK	175	return err;
ac27a0ec DK	176	}
617ba13b MC	177	case EXT4_IOC_GROUP_EXTEND: {
617ba13b MC	178	ext4_fsblk_t n_blocks_count;
ac046f1d	179	int err, err2=0;
ac27a0ec	180
8f82f840 YY	181	err = ext4_resize_begin(sb);
	182	if (err)
	183	return err;
ac27a0ec	184
ac27a0ec DK	185	if (get_user(n_blocks_count, (__u32 __user *)arg))
	186	return -EFAULT;
	187
bab08ab9 TT	188	if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
	189	EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
	190	ext4_msg(sb, KERN_ERR,
	191	"Online resizing not supported with bigalloc");
	192	return -EOPNOTSUPP;
	193	}
	194
42a74f20 DH	195	err = mnt_want_write(filp->f_path.mnt);
	196	if (err)
	197	return err;
	198
617ba13b	199	err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
ac046f1d PT	200	if (EXT4_SB(sb)->s_journal) {
	201	jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
	202	err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
	203	jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
	204	}
7ffe1ea8 HK	205	if (err == 0)
7ffe1ea8 HK	206	err = err2;
42a74f20	207	mnt_drop_write(filp->f_path.mnt);
8f82f840	208	ext4_resize_end(sb);
ac27a0ec DK	209
	210	return err;
	211	}
748de673 AF	212
	213	case EXT4_IOC_MOVE_EXT: {
	214	struct move_extent me;
	215	struct file *donor_filp;
	216	int err;
	217
4a58579b AF	218	if (!(filp->f_mode & FMODE_READ) \|\|
	219	!(filp->f_mode & FMODE_WRITE))
	220	return -EBADF;
	221
748de673 AF	222	if (copy_from_user(&me,
	223	(struct move_extent __user *)arg, sizeof(me)))
	224	return -EFAULT;
4a58579b	225	me.moved_len = 0;
748de673 AF	226
	227	donor_filp = fget(me.donor_fd);
	228	if (!donor_filp)
	229	return -EBADF;
	230
4a58579b AF	231	if (!(donor_filp->f_mode & FMODE_WRITE)) {
	232	err = -EBADF;
	233	goto mext_out;
748de673 AF	234	}
748de673 AF	235
bab08ab9 TT	236	if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
	237	EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
	238	ext4_msg(sb, KERN_ERR,
	239	"Online defrag not supported with bigalloc");
	240	return -EOPNOTSUPP;
	241	}
	242
4a58579b AF	243	err = mnt_want_write(filp->f_path.mnt);
	244	if (err)
	245	goto mext_out;
	246
748de673 AF	247	err = ext4_move_extents(filp, donor_filp, me.orig_start,
748de673 AF	248	me.donor_start, me.len, &me.moved_len);
4a58579b AF	249	mnt_drop_write(filp->f_path.mnt);
	250	if (me.moved_len > 0)
	251	file_remove_suid(donor_filp);
748de673	252
60e6679e	253	if (copy_to_user((struct move_extent __user *)arg,
c437b273	254	&me, sizeof(me)))
4a58579b AF	255	err = -EFAULT;
	256	mext_out:
	257	fput(donor_filp);
748de673 AF	258	return err;
	259	}
	260
617ba13b MC	261	case EXT4_IOC_GROUP_ADD: {
617ba13b MC	262	struct ext4_new_group_data input;
ac046f1d	263	int err, err2=0;
ac27a0ec	264
8f82f840 YY	265	err = ext4_resize_begin(sb);
	266	if (err)
	267	return err;
ac27a0ec	268
617ba13b	269	if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
ac27a0ec DK	270	sizeof(input)))
	271	return -EFAULT;
	272
bab08ab9 TT	273	if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
	274	EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
	275	ext4_msg(sb, KERN_ERR,
	276	"Online resizing not supported with bigalloc");
	277	return -EOPNOTSUPP;
	278	}
	279
42a74f20 DH	280	err = mnt_want_write(filp->f_path.mnt);
	281	if (err)
	282	return err;
	283
617ba13b	284	err = ext4_group_add(sb, &input);
ac046f1d PT	285	if (EXT4_SB(sb)->s_journal) {
	286	jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
	287	err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
	288	jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
	289	}
7ffe1ea8 HK	290	if (err == 0)
7ffe1ea8 HK	291	err = err2;
42a74f20	292	mnt_drop_write(filp->f_path.mnt);
8f82f840	293	ext4_resize_end(sb);
ac27a0ec DK	294
	295	return err;
	296	}
	297
c14c6fd5	298	case EXT4_IOC_MIGRATE:
2a43a878 AK	299	{
2a43a878 AK	300	int err;
2e149670	301	if (!inode_owner_or_capable(inode))
2a43a878 AK	302	return -EACCES;
	303
	304	err = mnt_want_write(filp->f_path.mnt);
	305	if (err)
	306	return err;
	307	/*
	308	* inode_mutex prevent write and truncate on the file.
	309	* Read still goes through. We take i_data_sem in
	310	* ext4_ext_swap_inode_data before we switch the
	311	* inode format to prevent read.
	312	*/
	313	mutex_lock(&(inode->i_mutex));
	314	err = ext4_ext_migrate(inode);
	315	mutex_unlock(&(inode->i_mutex));
	316	mnt_drop_write(filp->f_path.mnt);
	317	return err;
	318	}
c14c6fd5	319
ccd2506b TT	320	case EXT4_IOC_ALLOC_DA_BLKS:
	321	{
	322	int err;
2e149670	323	if (!inode_owner_or_capable(inode))
ccd2506b TT	324	return -EACCES;
	325
	326	err = mnt_want_write(filp->f_path.mnt);
	327	if (err)
	328	return err;
	329	err = ext4_alloc_da_blocks(inode);
	330	mnt_drop_write(filp->f_path.mnt);
	331	return err;
	332	}
	333
e681c047 LC	334	case FITRIM:
e681c047 LC	335	{
41431792	336	struct request_queue *q = bdev_get_queue(sb->s_bdev);
e681c047 LC	337	struct fstrim_range range;
	338	int ret = 0;
	339
	340	if (!capable(CAP_SYS_ADMIN))
	341	return -EPERM;
	342
41431792 LC	343	if (!blk_queue_discard(q))
	344	return -EOPNOTSUPP;
	345
bab08ab9 TT	346	if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
	347	EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
	348	ext4_msg(sb, KERN_ERR,
	349	"FITRIM not supported with bigalloc");
	350	return -EOPNOTSUPP;
	351	}
	352
e681c047 LC	353	if (copy_from_user(&range, (struct fstrim_range *)arg,
	354	sizeof(range)))
	355	return -EFAULT;
	356
5c2ed62f LC	357	range.minlen = max((unsigned int)range.minlen,
5c2ed62f LC	358	q->limits.discard_granularity);
e681c047 LC	359	ret = ext4_trim_fs(sb, &range);
	360	if (ret < 0)
	361	return ret;
	362
	363	if (copy_to_user((struct fstrim_range *)arg, &range,
	364	sizeof(range)))
	365	return -EFAULT;
	366
	367	return 0;
	368	}
	369
ac27a0ec DK	370	default:
	371	return -ENOTTY;
	372	}
	373	}
	374
	375	#ifdef CONFIG_COMPAT
617ba13b	376	long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
ac27a0ec	377	{
ac27a0ec DK	378	/* These are just misnamed, they actually get/put from/to user an int */
ac27a0ec DK	379	switch (cmd) {
617ba13b MC	380	case EXT4_IOC32_GETFLAGS:
617ba13b MC	381	cmd = EXT4_IOC_GETFLAGS;
ac27a0ec	382	break;
617ba13b MC	383	case EXT4_IOC32_SETFLAGS:
617ba13b MC	384	cmd = EXT4_IOC_SETFLAGS;
ac27a0ec	385	break;
617ba13b MC	386	case EXT4_IOC32_GETVERSION:
617ba13b MC	387	cmd = EXT4_IOC_GETVERSION;
ac27a0ec	388	break;
617ba13b MC	389	case EXT4_IOC32_SETVERSION:
617ba13b MC	390	cmd = EXT4_IOC_SETVERSION;
ac27a0ec	391	break;
617ba13b MC	392	case EXT4_IOC32_GROUP_EXTEND:
617ba13b MC	393	cmd = EXT4_IOC_GROUP_EXTEND;
ac27a0ec	394	break;
617ba13b MC	395	case EXT4_IOC32_GETVERSION_OLD:
617ba13b MC	396	cmd = EXT4_IOC_GETVERSION_OLD;
ac27a0ec	397	break;
617ba13b MC	398	case EXT4_IOC32_SETVERSION_OLD:
617ba13b MC	399	cmd = EXT4_IOC_SETVERSION_OLD;
ac27a0ec	400	break;
617ba13b MC	401	case EXT4_IOC32_GETRSVSZ:
617ba13b MC	402	cmd = EXT4_IOC_GETRSVSZ;
ac27a0ec	403	break;
617ba13b MC	404	case EXT4_IOC32_SETRSVSZ:
617ba13b MC	405	cmd = EXT4_IOC_SETRSVSZ;
ac27a0ec	406	break;
4d92dc0f BH	407	case EXT4_IOC32_GROUP_ADD: {
	408	struct compat_ext4_new_group_input __user *uinput;
	409	struct ext4_new_group_input input;
	410	mm_segment_t old_fs;
	411	int err;
	412
	413	uinput = compat_ptr(arg);
	414	err = get_user(input.group, &uinput->group);
	415	err \|= get_user(input.block_bitmap, &uinput->block_bitmap);
	416	err \|= get_user(input.inode_bitmap, &uinput->inode_bitmap);
	417	err \|= get_user(input.inode_table, &uinput->inode_table);
	418	err \|= get_user(input.blocks_count, &uinput->blocks_count);
	419	err \|= get_user(input.reserved_blocks,
	420	&uinput->reserved_blocks);
	421	if (err)
	422	return -EFAULT;
	423	old_fs = get_fs();
	424	set_fs(KERNEL_DS);
	425	err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD,
	426	(unsigned long) &input);
	427	set_fs(old_fs);
	428	return err;
	429	}
b684b2ee	430	case EXT4_IOC_MOVE_EXT:
a56e69c2	431	case FITRIM:
b684b2ee	432	break;
ac27a0ec DK	433	default:
	434	return -ENOIOCTLCMD;
	435	}
5cdd7b2d	436	return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
ac27a0ec DK	437	}
ac27a0ec DK	438	#endif