[mirror_ubuntu-zesty-kernel.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"

#define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1)

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 (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 EXT4_IOC_RESIZE_FS: {
		ext4_fsblk_t n_blocks_count;
		struct super_block *sb = inode->i_sb;
		int err = 0, err2 = 0;

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

		if (EXT4_HAS_INCOMPAT_FEATURE(sb,
			       EXT4_FEATURE_INCOMPAT_META_BG)) {
			ext4_msg(sb, KERN_ERR,
				 "Online resizing not (yet) supported with meta_bg");
			return -EOPNOTSUPP;
		}

		if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
				   sizeof(__u64))) {
			return -EFAULT;
		}

		if (n_blocks_count > MAX_32_NUM &&
		    !EXT4_HAS_INCOMPAT_FEATURE(sb,
					       EXT4_FEATURE_INCOMPAT_64BIT)) {
			ext4_msg(sb, KERN_ERR,
				 "File system only supports 32-bit block numbers");
			return -EOPNOTSUPP;
		}

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

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

		err = ext4_resize_fs(sb, 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);
resizefs_out:
		ext4_resize_end(sb);
		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 __user *)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 __user *)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:
	case EXT4_IOC_RESIZE_FS:
		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
19c5246d YY	21	#define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1)
19c5246d YY	22
5cdd7b2d	23	long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
ac27a0ec	24	{
5cdd7b2d	25	struct inode *inode = filp->f_dentry->d_inode;
bab08ab9	26	struct super_block *sb = inode->i_sb;
617ba13b	27	struct ext4_inode_info *ei = EXT4_I(inode);
ac27a0ec	28	unsigned int flags;
ac27a0ec	29
af5bc92d	30	ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
ac27a0ec DK	31
ac27a0ec DK	32	switch (cmd) {
617ba13b	33	case EXT4_IOC_GETFLAGS:
ff9ddf7e	34	ext4_get_inode_flags(ei);
617ba13b	35	flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
ac27a0ec	36	return put_user(flags, (int __user *) arg);
617ba13b	37	case EXT4_IOC_SETFLAGS: {
ac27a0ec	38	handle_t *handle = NULL;
4db46fc2	39	int err, migrate = 0;
617ba13b	40	struct ext4_iloc iloc;
ac27a0ec DK	41	unsigned int oldflags;
	42	unsigned int jflag;
	43
2e149670	44	if (!inode_owner_or_capable(inode))
ac27a0ec DK	45	return -EACCES;
	46
	47	if (get_user(flags, (int __user *) arg))
	48	return -EFAULT;
	49
42a74f20 DH	50	err = mnt_want_write(filp->f_path.mnt);
	51	if (err)
	52	return err;
	53
2dc6b0d4	54	flags = ext4_mask_flags(inode->i_mode, flags);
ac27a0ec	55
42a74f20	56	err = -EPERM;
ac27a0ec	57	mutex_lock(&inode->i_mutex);
e47776a0	58	/* Is it quota file? Do not allow user to mess with it */
42a74f20 DH	59	if (IS_NOQUOTA(inode))
	60	goto flags_out;
	61
ac27a0ec DK	62	oldflags = ei->i_flags;
	63
	64	/* The JOURNAL_DATA flag is modifiable only by root */
617ba13b	65	jflag = flags & EXT4_JOURNAL_DATA_FL;
ac27a0ec DK	66
	67	/*
	68	* The IMMUTABLE and APPEND_ONLY flags can only be changed by
	69	* the relevant capability.
	70	*
	71	* This test looks nicer. Thanks to Pauline Middelink
	72	*/
617ba13b	73	if ((flags ^ oldflags) & (EXT4_APPEND_FL \| EXT4_IMMUTABLE_FL)) {
42a74f20 DH	74	if (!capable(CAP_LINUX_IMMUTABLE))
42a74f20 DH	75	goto flags_out;
ac27a0ec DK	76	}
	77
	78	/*
	79	* The JOURNAL_DATA flag can only be changed by
	80	* the relevant capability.
	81	*/
617ba13b	82	if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
42a74f20 DH	83	if (!capable(CAP_SYS_RESOURCE))
42a74f20 DH	84	goto flags_out;
ac27a0ec	85	}
4db46fc2 AK	86	if (oldflags & EXT4_EXTENTS_FL) {
	87	/* We don't support clearning extent flags */
	88	if (!(flags & EXT4_EXTENTS_FL)) {
	89	err = -EOPNOTSUPP;
	90	goto flags_out;
	91	}
	92	} else if (flags & EXT4_EXTENTS_FL) {
	93	/* migrate the file */
	94	migrate = 1;
	95	flags &= ~EXT4_EXTENTS_FL;
	96	}
ac27a0ec	97
c8d46e41 JZ	98	if (flags & EXT4_EOFBLOCKS_FL) {
	99	/* we don't support adding EOFBLOCKS flag */
	100	if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
	101	err = -EOPNOTSUPP;
	102	goto flags_out;
	103	}
	104	} else if (oldflags & EXT4_EOFBLOCKS_FL)
	105	ext4_truncate(inode);
	106
617ba13b	107	handle = ext4_journal_start(inode, 1);
ac27a0ec	108	if (IS_ERR(handle)) {
42a74f20 DH	109	err = PTR_ERR(handle);
42a74f20 DH	110	goto flags_out;
ac27a0ec DK	111	}
ac27a0ec DK	112	if (IS_SYNC(inode))
0390131b	113	ext4_handle_sync(handle);
617ba13b	114	err = ext4_reserve_inode_write(handle, inode, &iloc);
ac27a0ec DK	115	if (err)
	116	goto flags_err;
	117
617ba13b MC	118	flags = flags & EXT4_FL_USER_MODIFIABLE;
617ba13b MC	119	flags \|= oldflags & ~EXT4_FL_USER_MODIFIABLE;
ac27a0ec DK	120	ei->i_flags = flags;
ac27a0ec DK	121
617ba13b	122	ext4_set_inode_flags(inode);
ef7f3835	123	inode->i_ctime = ext4_current_time(inode);
ac27a0ec	124
617ba13b	125	err = ext4_mark_iloc_dirty(handle, inode, &iloc);
ac27a0ec	126	flags_err:
617ba13b	127	ext4_journal_stop(handle);
42a74f20 DH	128	if (err)
42a74f20 DH	129	goto flags_out;
ac27a0ec	130
617ba13b MC	131	if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
617ba13b MC	132	err = ext4_change_inode_journal_flag(inode, jflag);
4db46fc2 AK	133	if (err)
	134	goto flags_out;
	135	if (migrate)
	136	err = ext4_ext_migrate(inode);
42a74f20	137	flags_out:
ac27a0ec	138	mutex_unlock(&inode->i_mutex);
42a74f20	139	mnt_drop_write(filp->f_path.mnt);
ac27a0ec DK	140	return err;
ac27a0ec DK	141	}
617ba13b MC	142	case EXT4_IOC_GETVERSION:
617ba13b MC	143	case EXT4_IOC_GETVERSION_OLD:
ac27a0ec	144	return put_user(inode->i_generation, (int __user *) arg);
617ba13b MC	145	case EXT4_IOC_SETVERSION:
617ba13b MC	146	case EXT4_IOC_SETVERSION_OLD: {
ac27a0ec	147	handle_t *handle;
617ba13b	148	struct ext4_iloc iloc;
ac27a0ec DK	149	__u32 generation;
	150	int err;
	151
2e149670	152	if (!inode_owner_or_capable(inode))
ac27a0ec	153	return -EPERM;
42a74f20 DH	154
	155	err = mnt_want_write(filp->f_path.mnt);
	156	if (err)
	157	return err;
	158	if (get_user(generation, (int __user *) arg)) {
	159	err = -EFAULT;
	160	goto setversion_out;
	161	}
ac27a0ec	162
617ba13b	163	handle = ext4_journal_start(inode, 1);
42a74f20 DH	164	if (IS_ERR(handle)) {
	165	err = PTR_ERR(handle);
	166	goto setversion_out;
	167	}
617ba13b	168	err = ext4_reserve_inode_write(handle, inode, &iloc);
ac27a0ec	169	if (err == 0) {
ef7f3835	170	inode->i_ctime = ext4_current_time(inode);
ac27a0ec	171	inode->i_generation = generation;
617ba13b	172	err = ext4_mark_iloc_dirty(handle, inode, &iloc);
ac27a0ec	173	}
617ba13b	174	ext4_journal_stop(handle);
42a74f20 DH	175	setversion_out:
42a74f20 DH	176	mnt_drop_write(filp->f_path.mnt);
ac27a0ec DK	177	return err;
ac27a0ec DK	178	}
617ba13b MC	179	case EXT4_IOC_GROUP_EXTEND: {
617ba13b MC	180	ext4_fsblk_t n_blocks_count;
ac046f1d	181	int err, err2=0;
ac27a0ec	182
8f82f840 YY	183	err = ext4_resize_begin(sb);
	184	if (err)
	185	return err;
ac27a0ec	186
ac27a0ec DK	187	if (get_user(n_blocks_count, (__u32 __user *)arg))
	188	return -EFAULT;
	189
bab08ab9 TT	190	if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
	191	EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
	192	ext4_msg(sb, KERN_ERR,
	193	"Online resizing not supported with bigalloc");
	194	return -EOPNOTSUPP;
	195	}
	196
42a74f20 DH	197	err = mnt_want_write(filp->f_path.mnt);
	198	if (err)
	199	return err;
	200
617ba13b	201	err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
ac046f1d PT	202	if (EXT4_SB(sb)->s_journal) {
	203	jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
	204	err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
	205	jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
	206	}
7ffe1ea8 HK	207	if (err == 0)
7ffe1ea8 HK	208	err = err2;
42a74f20	209	mnt_drop_write(filp->f_path.mnt);
8f82f840	210	ext4_resize_end(sb);
ac27a0ec DK	211
	212	return err;
	213	}
748de673 AF	214
	215	case EXT4_IOC_MOVE_EXT: {
	216	struct move_extent me;
	217	struct file *donor_filp;
	218	int err;
	219
4a58579b AF	220	if (!(filp->f_mode & FMODE_READ) \|\|
	221	!(filp->f_mode & FMODE_WRITE))
	222	return -EBADF;
	223
748de673 AF	224	if (copy_from_user(&me,
	225	(struct move_extent __user *)arg, sizeof(me)))
	226	return -EFAULT;
4a58579b	227	me.moved_len = 0;
748de673 AF	228
	229	donor_filp = fget(me.donor_fd);
	230	if (!donor_filp)
	231	return -EBADF;
	232
4a58579b AF	233	if (!(donor_filp->f_mode & FMODE_WRITE)) {
	234	err = -EBADF;
	235	goto mext_out;
748de673 AF	236	}
748de673 AF	237
bab08ab9 TT	238	if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
	239	EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
	240	ext4_msg(sb, KERN_ERR,
	241	"Online defrag not supported with bigalloc");
	242	return -EOPNOTSUPP;
	243	}
	244
4a58579b AF	245	err = mnt_want_write(filp->f_path.mnt);
	246	if (err)
	247	goto mext_out;
	248
748de673 AF	249	err = ext4_move_extents(filp, donor_filp, me.orig_start,
748de673 AF	250	me.donor_start, me.len, &me.moved_len);
4a58579b	251	mnt_drop_write(filp->f_path.mnt);
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
19c5246d YY	334	case EXT4_IOC_RESIZE_FS: {
	335	ext4_fsblk_t n_blocks_count;
	336	struct super_block *sb = inode->i_sb;
	337	int err = 0, err2 = 0;
	338
	339	if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
	340	EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
	341	ext4_msg(sb, KERN_ERR,
	342	"Online resizing not (yet) supported with bigalloc");
	343	return -EOPNOTSUPP;
	344	}
	345
	346	if (EXT4_HAS_INCOMPAT_FEATURE(sb,
	347	EXT4_FEATURE_INCOMPAT_META_BG)) {
	348	ext4_msg(sb, KERN_ERR,
	349	"Online resizing not (yet) supported with meta_bg");
	350	return -EOPNOTSUPP;
	351	}
	352
	353	if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
	354	sizeof(__u64))) {
	355	return -EFAULT;
	356	}
	357
	358	if (n_blocks_count > MAX_32_NUM &&
	359	!EXT4_HAS_INCOMPAT_FEATURE(sb,
	360	EXT4_FEATURE_INCOMPAT_64BIT)) {
	361	ext4_msg(sb, KERN_ERR,
	362	"File system only supports 32-bit block numbers");
	363	return -EOPNOTSUPP;
	364	}
	365
	366	err = ext4_resize_begin(sb);
	367	if (err)
	368	return err;
	369
	370	err = mnt_want_write(filp->f_path.mnt);
	371	if (err)
	372	goto resizefs_out;
	373
	374	err = ext4_resize_fs(sb, n_blocks_count);
	375	if (EXT4_SB(sb)->s_journal) {
	376	jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
	377	err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
	378	jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
	379	}
	380	if (err == 0)
	381	err = err2;
	382	mnt_drop_write(filp->f_path.mnt);
	383	resizefs_out:
	384	ext4_resize_end(sb);
	385	return err;
	386	}
	387
e681c047 LC	388	case FITRIM:
e681c047 LC	389	{
41431792	390	struct request_queue *q = bdev_get_queue(sb->s_bdev);
e681c047 LC	391	struct fstrim_range range;
	392	int ret = 0;
	393
	394	if (!capable(CAP_SYS_ADMIN))
	395	return -EPERM;
	396
41431792 LC	397	if (!blk_queue_discard(q))
	398	return -EOPNOTSUPP;
	399
bab08ab9 TT	400	if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
	401	EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
	402	ext4_msg(sb, KERN_ERR,
	403	"FITRIM not supported with bigalloc");
	404	return -EOPNOTSUPP;
	405	}
	406
e6705f7c	407	if (copy_from_user(&range, (struct fstrim_range __user *)arg,
e681c047 LC	408	sizeof(range)))
	409	return -EFAULT;
	410
5c2ed62f LC	411	range.minlen = max((unsigned int)range.minlen,
5c2ed62f LC	412	q->limits.discard_granularity);
e681c047 LC	413	ret = ext4_trim_fs(sb, &range);
	414	if (ret < 0)
	415	return ret;
	416
e6705f7c	417	if (copy_to_user((struct fstrim_range __user *)arg, &range,
e681c047 LC	418	sizeof(range)))
	419	return -EFAULT;
	420
	421	return 0;
	422	}
	423
ac27a0ec DK	424	default:
	425	return -ENOTTY;
	426	}
	427	}
	428
	429	#ifdef CONFIG_COMPAT
617ba13b	430	long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
ac27a0ec	431	{
ac27a0ec DK	432	/* These are just misnamed, they actually get/put from/to user an int */
ac27a0ec DK	433	switch (cmd) {
617ba13b MC	434	case EXT4_IOC32_GETFLAGS:
617ba13b MC	435	cmd = EXT4_IOC_GETFLAGS;
ac27a0ec	436	break;
617ba13b MC	437	case EXT4_IOC32_SETFLAGS:
617ba13b MC	438	cmd = EXT4_IOC_SETFLAGS;
ac27a0ec	439	break;
617ba13b MC	440	case EXT4_IOC32_GETVERSION:
617ba13b MC	441	cmd = EXT4_IOC_GETVERSION;
ac27a0ec	442	break;
617ba13b MC	443	case EXT4_IOC32_SETVERSION:
617ba13b MC	444	cmd = EXT4_IOC_SETVERSION;
ac27a0ec	445	break;
617ba13b MC	446	case EXT4_IOC32_GROUP_EXTEND:
617ba13b MC	447	cmd = EXT4_IOC_GROUP_EXTEND;
ac27a0ec	448	break;
617ba13b MC	449	case EXT4_IOC32_GETVERSION_OLD:
617ba13b MC	450	cmd = EXT4_IOC_GETVERSION_OLD;
ac27a0ec	451	break;
617ba13b MC	452	case EXT4_IOC32_SETVERSION_OLD:
617ba13b MC	453	cmd = EXT4_IOC_SETVERSION_OLD;
ac27a0ec	454	break;
617ba13b MC	455	case EXT4_IOC32_GETRSVSZ:
617ba13b MC	456	cmd = EXT4_IOC_GETRSVSZ;
ac27a0ec	457	break;
617ba13b MC	458	case EXT4_IOC32_SETRSVSZ:
617ba13b MC	459	cmd = EXT4_IOC_SETRSVSZ;
ac27a0ec	460	break;
4d92dc0f BH	461	case EXT4_IOC32_GROUP_ADD: {
	462	struct compat_ext4_new_group_input __user *uinput;
	463	struct ext4_new_group_input input;
	464	mm_segment_t old_fs;
	465	int err;
	466
	467	uinput = compat_ptr(arg);
	468	err = get_user(input.group, &uinput->group);
	469	err \|= get_user(input.block_bitmap, &uinput->block_bitmap);
	470	err \|= get_user(input.inode_bitmap, &uinput->inode_bitmap);
	471	err \|= get_user(input.inode_table, &uinput->inode_table);
	472	err \|= get_user(input.blocks_count, &uinput->blocks_count);
	473	err \|= get_user(input.reserved_blocks,
	474	&uinput->reserved_blocks);
	475	if (err)
	476	return -EFAULT;
	477	old_fs = get_fs();
	478	set_fs(KERNEL_DS);
	479	err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD,
	480	(unsigned long) &input);
	481	set_fs(old_fs);
	482	return err;
	483	}
b684b2ee	484	case EXT4_IOC_MOVE_EXT:
a56e69c2	485	case FITRIM:
19c5246d	486	case EXT4_IOC_RESIZE_FS:
b684b2ee	487	break;
ac27a0ec DK	488	default:
	489	return -ENOIOCTLCMD;
	490	}
5cdd7b2d	491	return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
ac27a0ec DK	492	}
ac27a0ec DK	493	#endif