Commit 439dfb10 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: introduce F2FS_IOC_GET_COMPRESS_BLOCKS 



With this newly introduced interface, user can get block
number compression saved in target inode.

Signed-off-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 0683728a

fs/f2fs/f2fs.h

+1 −0
Original line number Diff line number Diff line
@@ -426,6 +426,7 @@ static inline bool __has_cursum_space(struct f2fs_journal *journal, 
#define F2FS_IOC_GET_PIN_FILE		_IOR(F2FS_IOCTL_MAGIC, 14, __u32)

#define F2FS_IOC_PRECACHE_EXTENTS	_IO(F2FS_IOCTL_MAGIC, 15)

#define F2FS_IOC_RESIZE_FS		_IOW(F2FS_IOCTL_MAGIC, 16, __u64)

#define F2FS_IOC_GET_COMPRESS_BLOCKS	_IOR(F2FS_IOCTL_MAGIC, 17, __u64)



#define F2FS_IOC_GET_VOLUME_NAME	FS_IOC_GETFSLABEL

#define F2FS_IOC_SET_VOLUME_NAME	FS_IOC_SETFSLABEL

fs/f2fs/file.c

+18 −0
Original line number Diff line number Diff line
@@ -3398,6 +3398,21 @@ static int f2fs_set_volume_name(struct file *filp, unsigned long arg) 
	return err;

}



static int f2fs_get_compress_blocks(struct file *filp, unsigned long arg)

{

	struct inode *inode = file_inode(filp);

	__u64 blocks;



	if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))

		return -EOPNOTSUPP;



	if (!f2fs_compressed_file(inode))

		return -EINVAL;



	blocks = F2FS_I(inode)->i_compr_blocks;

	return put_user(blocks, (u64 __user *)arg);

}



long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)

{

	if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
@@ -3476,6 +3491,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 
		return f2fs_get_volume_name(filp, arg);

	case F2FS_IOC_SET_VOLUME_NAME:

		return f2fs_set_volume_name(filp, arg);

	case F2FS_IOC_GET_COMPRESS_BLOCKS:

		return f2fs_get_compress_blocks(filp, arg);

	default:

		return -ENOTTY;

	}
@@ -3633,6 +3650,7 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 
	case FS_IOC_MEASURE_VERITY:

	case F2FS_IOC_GET_VOLUME_NAME:

	case F2FS_IOC_SET_VOLUME_NAME:

	case F2FS_IOC_GET_COMPRESS_BLOCKS:

		break;

	default:

		return -ENOIOCTLCMD;