[deliverable/linux.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 = file_inode(filp);
	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, mask, i;
		unsigned int jflag;

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

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

		err = mnt_want_write_file(filp);
		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 ((flags ^ oldflags) & EXT4_EXTENTS_FL)
			migrate = 1;

		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, EXT4_HT_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;

		for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
			if (!(mask & EXT4_FL_USER_MODIFIABLE))
				continue;
			if (mask & flags)
				ext4_set_inode_flag(inode, i);
			else
				ext4_clear_inode_flag(inode, i);
		}

		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) {
			if (flags & EXT4_EXTENTS_FL)
				err = ext4_ext_migrate(inode);
			else
				err = ext4_ind_migrate(inode);
		}

flags_out:
		mutex_unlock(&inode->i_mutex);
		mnt_drop_write_file(filp);
		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;

		if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
				EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
			ext4_warning(sb, "Setting inode version is not "
				     "supported with metadata_csum enabled.");
			return -ENOTTY;
		}

		err = mnt_want_write_file(filp);
		if (err)
			return err;
		if (get_user(generation, (int __user *) arg)) {
			err = -EFAULT;
			goto setversion_out;
		}

		mutex_lock(&inode->i_mutex);
		handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
		if (IS_ERR(handle)) {
			err = PTR_ERR(handle);
			goto unlock_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);

unlock_out:
		mutex_unlock(&inode->i_mutex);
setversion_out:
		mnt_drop_write_file(filp);
		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)) {
			err = -EFAULT;
			goto group_extend_out;
		}

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

		err = mnt_want_write_file(filp);
		if (err)
			goto group_extend_out;

		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_file(filp);
group_extend_out:
		ext4_resize_end(sb);
		return err;
	}

	case EXT4_IOC_MOVE_EXT: {
		struct move_extent me;
		struct fd donor;
		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 = fdget(me.donor_fd);
		if (!donor.file)
			return -EBADF;

		if (!(donor.file->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");
			err = -EOPNOTSUPP;
			goto mext_out;
		}

		err = mnt_want_write_file(filp);
		if (err)
			goto mext_out;

		err = ext4_move_extents(filp, donor.file, me.orig_start,
					me.donor_start, me.len, &me.moved_len);
		mnt_drop_write_file(filp);

		if (copy_to_user((struct move_extent __user *)arg,
				 &me, sizeof(me)))
			err = -EFAULT;
mext_out:
		fdput(donor);
		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))) {
			err = -EFAULT;
			goto group_add_out;
		}

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

		err = mnt_want_write_file(filp);
		if (err)
			goto group_add_out;

		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_file(filp);
		if (!err && ext4_has_group_desc_csum(sb) &&
		    test_opt(sb, INIT_INODE_TABLE))
			err = ext4_register_li_request(sb, input.group);
group_add_out:
		ext4_resize_end(sb);
		return err;
	}

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

		err = mnt_want_write_file(filp);
		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_file(filp);
		return err;
	}

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

		err = mnt_want_write_file(filp);
		if (err)
			return err;
		err = ext4_alloc_da_blocks(inode);
		mnt_drop_write_file(filp);
		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;
		ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;

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

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

		err = mnt_want_write_file(filp);
		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_file(filp);
		if (!err && (o_group > EXT4_SB(sb)->s_groups_count) &&
		    ext4_has_group_desc_csum(sb) &&
		    test_opt(sb, INIT_INODE_TABLE))
			err = ext4_register_li_request(sb, o_group);

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 (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	{
496ad9aa	25	struct inode *inode = file_inode(filp);
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;
79906964	41	unsigned int oldflags, mask, i;
ac27a0ec DK	42	unsigned int jflag;
ac27a0ec DK	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
a561be71	50	err = mnt_want_write_file(filp);
42a74f20 DH	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	}
996bb9fd	86	if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
4db46fc2	87	migrate = 1;
ac27a0ec	88
c8d46e41 JZ	89	if (flags & EXT4_EOFBLOCKS_FL) {
	90	/* we don't support adding EOFBLOCKS flag */
	91	if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
	92	err = -EOPNOTSUPP;
	93	goto flags_out;
	94	}
	95	} else if (oldflags & EXT4_EOFBLOCKS_FL)
	96	ext4_truncate(inode);
	97
9924a92a	98	handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
ac27a0ec	99	if (IS_ERR(handle)) {
42a74f20 DH	100	err = PTR_ERR(handle);
42a74f20 DH	101	goto flags_out;
ac27a0ec DK	102	}
ac27a0ec DK	103	if (IS_SYNC(inode))
0390131b	104	ext4_handle_sync(handle);
617ba13b	105	err = ext4_reserve_inode_write(handle, inode, &iloc);
ac27a0ec DK	106	if (err)
	107	goto flags_err;
	108
79906964 TT	109	for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
	110	if (!(mask & EXT4_FL_USER_MODIFIABLE))
	111	continue;
	112	if (mask & flags)
	113	ext4_set_inode_flag(inode, i);
	114	else
	115	ext4_clear_inode_flag(inode, i);
	116	}
ac27a0ec	117
617ba13b	118	ext4_set_inode_flags(inode);
ef7f3835	119	inode->i_ctime = ext4_current_time(inode);
ac27a0ec	120
617ba13b	121	err = ext4_mark_iloc_dirty(handle, inode, &iloc);
ac27a0ec	122	flags_err:
617ba13b	123	ext4_journal_stop(handle);
42a74f20 DH	124	if (err)
42a74f20 DH	125	goto flags_out;
ac27a0ec	126
617ba13b MC	127	if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
617ba13b MC	128	err = ext4_change_inode_journal_flag(inode, jflag);
4db46fc2 AK	129	if (err)
4db46fc2 AK	130	goto flags_out;
996bb9fd TT	131	if (migrate) {
	132	if (flags & EXT4_EXTENTS_FL)
	133	err = ext4_ext_migrate(inode);
	134	else
	135	err = ext4_ind_migrate(inode);
	136	}
	137
42a74f20	138	flags_out:
ac27a0ec	139	mutex_unlock(&inode->i_mutex);
2a79f17e	140	mnt_drop_write_file(filp);
ac27a0ec DK	141	return err;
ac27a0ec DK	142	}
617ba13b MC	143	case EXT4_IOC_GETVERSION:
617ba13b MC	144	case EXT4_IOC_GETVERSION_OLD:
ac27a0ec	145	return put_user(inode->i_generation, (int __user *) arg);
617ba13b MC	146	case EXT4_IOC_SETVERSION:
617ba13b MC	147	case EXT4_IOC_SETVERSION_OLD: {
ac27a0ec	148	handle_t *handle;
617ba13b	149	struct ext4_iloc iloc;
ac27a0ec DK	150	__u32 generation;
	151	int err;
	152
2e149670	153	if (!inode_owner_or_capable(inode))
ac27a0ec	154	return -EPERM;
42a74f20	155
814525f4 DW	156	if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
	157	EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
	158	ext4_warning(sb, "Setting inode version is not "
	159	"supported with metadata_csum enabled.");
	160	return -ENOTTY;
	161	}
	162
a561be71	163	err = mnt_want_write_file(filp);
42a74f20 DH	164	if (err)
	165	return err;
	166	if (get_user(generation, (int __user *) arg)) {
	167	err = -EFAULT;
	168	goto setversion_out;
	169	}
ac27a0ec	170
6c2155b9	171	mutex_lock(&inode->i_mutex);
9924a92a	172	handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
42a74f20 DH	173	if (IS_ERR(handle)) {
42a74f20 DH	174	err = PTR_ERR(handle);
6c2155b9	175	goto unlock_out;
42a74f20	176	}
617ba13b	177	err = ext4_reserve_inode_write(handle, inode, &iloc);
ac27a0ec	178	if (err == 0) {
ef7f3835	179	inode->i_ctime = ext4_current_time(inode);
ac27a0ec	180	inode->i_generation = generation;
617ba13b	181	err = ext4_mark_iloc_dirty(handle, inode, &iloc);
ac27a0ec	182	}
617ba13b	183	ext4_journal_stop(handle);
6c2155b9 DH	184
	185	unlock_out:
	186	mutex_unlock(&inode->i_mutex);
42a74f20	187	setversion_out:
2a79f17e	188	mnt_drop_write_file(filp);
ac27a0ec DK	189	return err;
ac27a0ec DK	190	}
617ba13b MC	191	case EXT4_IOC_GROUP_EXTEND: {
617ba13b MC	192	ext4_fsblk_t n_blocks_count;
ac046f1d	193	int err, err2=0;
ac27a0ec	194
8f82f840 YY	195	err = ext4_resize_begin(sb);
	196	if (err)
	197	return err;
ac27a0ec	198
014a1770 DH	199	if (get_user(n_blocks_count, (__u32 __user *)arg)) {
	200	err = -EFAULT;
	201	goto group_extend_out;
	202	}
ac27a0ec	203
bab08ab9 TT	204	if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
	205	EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
	206	ext4_msg(sb, KERN_ERR,
	207	"Online resizing not supported with bigalloc");
014a1770 DH	208	err = -EOPNOTSUPP;
014a1770 DH	209	goto group_extend_out;
bab08ab9 TT	210	}
bab08ab9 TT	211
a561be71	212	err = mnt_want_write_file(filp);
42a74f20	213	if (err)
014a1770	214	goto group_extend_out;
42a74f20	215
617ba13b	216	err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
ac046f1d PT	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	}
7ffe1ea8 HK	222	if (err == 0)
7ffe1ea8 HK	223	err = err2;
2a79f17e	224	mnt_drop_write_file(filp);
014a1770	225	group_extend_out:
8f82f840	226	ext4_resize_end(sb);
ac27a0ec DK	227	return err;
ac27a0ec DK	228	}
748de673 AF	229
	230	case EXT4_IOC_MOVE_EXT: {
	231	struct move_extent me;
2903ff01 AV	232	struct fd donor;
2903ff01 AV	233	int err;
748de673	234
4a58579b AF	235	if (!(filp->f_mode & FMODE_READ) \|\|
	236	!(filp->f_mode & FMODE_WRITE))
	237	return -EBADF;
	238
748de673 AF	239	if (copy_from_user(&me,
	240	(struct move_extent __user *)arg, sizeof(me)))
	241	return -EFAULT;
4a58579b	242	me.moved_len = 0;
748de673	243
2903ff01 AV	244	donor = fdget(me.donor_fd);
2903ff01 AV	245	if (!donor.file)
748de673 AF	246	return -EBADF;
748de673 AF	247
2903ff01	248	if (!(donor.file->f_mode & FMODE_WRITE)) {
4a58579b AF	249	err = -EBADF;
4a58579b AF	250	goto mext_out;
748de673 AF	251	}
748de673 AF	252
bab08ab9 TT	253	if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
	254	EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
	255	ext4_msg(sb, KERN_ERR,
	256	"Online defrag not supported with bigalloc");
399c9b86 AV	257	err = -EOPNOTSUPP;
399c9b86 AV	258	goto mext_out;
bab08ab9 TT	259	}
bab08ab9 TT	260
a561be71	261	err = mnt_want_write_file(filp);
4a58579b AF	262	if (err)
	263	goto mext_out;
	264
2903ff01	265	err = ext4_move_extents(filp, donor.file, me.orig_start,
748de673	266	me.donor_start, me.len, &me.moved_len);
2a79f17e	267	mnt_drop_write_file(filp);
748de673	268
60e6679e	269	if (copy_to_user((struct move_extent __user *)arg,
c437b273	270	&me, sizeof(me)))
4a58579b AF	271	err = -EFAULT;
4a58579b AF	272	mext_out:
2903ff01	273	fdput(donor);
748de673 AF	274	return err;
	275	}
	276
617ba13b MC	277	case EXT4_IOC_GROUP_ADD: {
617ba13b MC	278	struct ext4_new_group_data input;
ac046f1d	279	int err, err2=0;
ac27a0ec	280
8f82f840 YY	281	err = ext4_resize_begin(sb);
	282	if (err)
	283	return err;
ac27a0ec	284
617ba13b	285	if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
014a1770 DH	286	sizeof(input))) {
	287	err = -EFAULT;
	288	goto group_add_out;
	289	}
ac27a0ec	290
bab08ab9 TT	291	if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
	292	EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
	293	ext4_msg(sb, KERN_ERR,
	294	"Online resizing not supported with bigalloc");
014a1770 DH	295	err = -EOPNOTSUPP;
014a1770 DH	296	goto group_add_out;
bab08ab9 TT	297	}
bab08ab9 TT	298
a561be71	299	err = mnt_want_write_file(filp);
42a74f20	300	if (err)
014a1770	301	goto group_add_out;
42a74f20	302
617ba13b	303	err = ext4_group_add(sb, &input);
ac046f1d PT	304	if (EXT4_SB(sb)->s_journal) {
	305	jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
	306	err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
	307	jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
	308	}
7ffe1ea8 HK	309	if (err == 0)
7ffe1ea8 HK	310	err = err2;
2a79f17e	311	mnt_drop_write_file(filp);
7f511862 TT	312	if (!err && ext4_has_group_desc_csum(sb) &&
	313	test_opt(sb, INIT_INODE_TABLE))
	314	err = ext4_register_li_request(sb, input.group);
014a1770	315	group_add_out:
8f82f840	316	ext4_resize_end(sb);
ac27a0ec DK	317	return err;
	318	}
	319
c14c6fd5	320	case EXT4_IOC_MIGRATE:
2a43a878 AK	321	{
2a43a878 AK	322	int err;
2e149670	323	if (!inode_owner_or_capable(inode))
2a43a878 AK	324	return -EACCES;
2a43a878 AK	325
a561be71	326	err = mnt_want_write_file(filp);
2a43a878 AK	327	if (err)
	328	return err;
	329	/*
	330	* inode_mutex prevent write and truncate on the file.
	331	* Read still goes through. We take i_data_sem in
	332	* ext4_ext_swap_inode_data before we switch the
	333	* inode format to prevent read.
	334	*/
	335	mutex_lock(&(inode->i_mutex));
	336	err = ext4_ext_migrate(inode);
	337	mutex_unlock(&(inode->i_mutex));
2a79f17e	338	mnt_drop_write_file(filp);
2a43a878 AK	339	return err;
2a43a878 AK	340	}
c14c6fd5	341
ccd2506b TT	342	case EXT4_IOC_ALLOC_DA_BLKS:
	343	{
	344	int err;
2e149670	345	if (!inode_owner_or_capable(inode))
ccd2506b TT	346	return -EACCES;
ccd2506b TT	347
a561be71	348	err = mnt_want_write_file(filp);
ccd2506b TT	349	if (err)
	350	return err;
	351	err = ext4_alloc_da_blocks(inode);
2a79f17e	352	mnt_drop_write_file(filp);
ccd2506b TT	353	return err;
	354	}
	355
19c5246d YY	356	case EXT4_IOC_RESIZE_FS: {
	357	ext4_fsblk_t n_blocks_count;
	358	struct super_block *sb = inode->i_sb;
	359	int err = 0, err2 = 0;
7f511862	360	ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
19c5246d YY	361
	362	if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
	363	EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
	364	ext4_msg(sb, KERN_ERR,
	365	"Online resizing not (yet) supported with bigalloc");
	366	return -EOPNOTSUPP;
	367	}
	368
19c5246d YY	369	if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
	370	sizeof(__u64))) {
	371	return -EFAULT;
	372	}
	373
19c5246d YY	374	err = ext4_resize_begin(sb);
	375	if (err)
	376	return err;
	377
8cae6f71	378	err = mnt_want_write_file(filp);
19c5246d YY	379	if (err)
	380	goto resizefs_out;
	381
	382	err = ext4_resize_fs(sb, n_blocks_count);
	383	if (EXT4_SB(sb)->s_journal) {
	384	jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
	385	err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
	386	jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
	387	}
	388	if (err == 0)
	389	err = err2;
8cae6f71	390	mnt_drop_write_file(filp);
7f511862 TT	391	if (!err && (o_group > EXT4_SB(sb)->s_groups_count) &&
	392	ext4_has_group_desc_csum(sb) &&
	393	test_opt(sb, INIT_INODE_TABLE))
	394	err = ext4_register_li_request(sb, o_group);
	395
19c5246d YY	396	resizefs_out:
	397	ext4_resize_end(sb);
	398	return err;
	399	}
	400
e681c047 LC	401	case FITRIM:
e681c047 LC	402	{
41431792	403	struct request_queue *q = bdev_get_queue(sb->s_bdev);
e681c047 LC	404	struct fstrim_range range;
	405	int ret = 0;
	406
	407	if (!capable(CAP_SYS_ADMIN))
	408	return -EPERM;
	409
41431792 LC	410	if (!blk_queue_discard(q))
	411	return -EOPNOTSUPP;
	412
e6705f7c	413	if (copy_from_user(&range, (struct fstrim_range __user *)arg,
e681c047 LC	414	sizeof(range)))
	415	return -EFAULT;
	416
5c2ed62f LC	417	range.minlen = max((unsigned int)range.minlen,
5c2ed62f LC	418	q->limits.discard_granularity);
e681c047 LC	419	ret = ext4_trim_fs(sb, &range);
	420	if (ret < 0)
	421	return ret;
	422
e6705f7c	423	if (copy_to_user((struct fstrim_range __user *)arg, &range,
e681c047 LC	424	sizeof(range)))
	425	return -EFAULT;
	426
	427	return 0;
	428	}
	429
ac27a0ec DK	430	default:
	431	return -ENOTTY;
	432	}
	433	}
	434
	435	#ifdef CONFIG_COMPAT
617ba13b	436	long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
ac27a0ec	437	{
ac27a0ec DK	438	/* These are just misnamed, they actually get/put from/to user an int */
ac27a0ec DK	439	switch (cmd) {
617ba13b MC	440	case EXT4_IOC32_GETFLAGS:
617ba13b MC	441	cmd = EXT4_IOC_GETFLAGS;
ac27a0ec	442	break;
617ba13b MC	443	case EXT4_IOC32_SETFLAGS:
617ba13b MC	444	cmd = EXT4_IOC_SETFLAGS;
ac27a0ec	445	break;
617ba13b MC	446	case EXT4_IOC32_GETVERSION:
617ba13b MC	447	cmd = EXT4_IOC_GETVERSION;
ac27a0ec	448	break;
617ba13b MC	449	case EXT4_IOC32_SETVERSION:
617ba13b MC	450	cmd = EXT4_IOC_SETVERSION;
ac27a0ec	451	break;
617ba13b MC	452	case EXT4_IOC32_GROUP_EXTEND:
617ba13b MC	453	cmd = EXT4_IOC_GROUP_EXTEND;
ac27a0ec	454	break;
617ba13b MC	455	case EXT4_IOC32_GETVERSION_OLD:
617ba13b MC	456	cmd = EXT4_IOC_GETVERSION_OLD;
ac27a0ec	457	break;
617ba13b MC	458	case EXT4_IOC32_SETVERSION_OLD:
617ba13b MC	459	cmd = EXT4_IOC_SETVERSION_OLD;
ac27a0ec	460	break;
617ba13b MC	461	case EXT4_IOC32_GETRSVSZ:
617ba13b MC	462	cmd = EXT4_IOC_GETRSVSZ;
ac27a0ec	463	break;
617ba13b MC	464	case EXT4_IOC32_SETRSVSZ:
617ba13b MC	465	cmd = EXT4_IOC_SETRSVSZ;
ac27a0ec	466	break;
4d92dc0f BH	467	case EXT4_IOC32_GROUP_ADD: {
	468	struct compat_ext4_new_group_input __user *uinput;
	469	struct ext4_new_group_input input;
	470	mm_segment_t old_fs;
	471	int err;
	472
	473	uinput = compat_ptr(arg);
	474	err = get_user(input.group, &uinput->group);
	475	err \|= get_user(input.block_bitmap, &uinput->block_bitmap);
	476	err \|= get_user(input.inode_bitmap, &uinput->inode_bitmap);
	477	err \|= get_user(input.inode_table, &uinput->inode_table);
	478	err \|= get_user(input.blocks_count, &uinput->blocks_count);
	479	err \|= get_user(input.reserved_blocks,
	480	&uinput->reserved_blocks);
	481	if (err)
	482	return -EFAULT;
	483	old_fs = get_fs();
	484	set_fs(KERNEL_DS);
	485	err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD,
	486	(unsigned long) &input);
	487	set_fs(old_fs);
	488	return err;
	489	}
b684b2ee	490	case EXT4_IOC_MOVE_EXT:
a56e69c2	491	case FITRIM:
19c5246d	492	case EXT4_IOC_RESIZE_FS:
b684b2ee	493	break;
ac27a0ec DK	494	default:
	495	return -ENOIOCTLCMD;
	496	}
5cdd7b2d	497	return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
ac27a0ec DK	498	}
ac27a0ec DK	499	#endif