f2fs: add F2FS_IOC_GET_COMPRESS_OPTION ioctl (9e2a5f8c) · Commits · 戴 / test

fs/f2fs/file.c

+30 −0

Original line number	Diff line number	Diff line
		@@ -3945,6 +3945,33 @@ err:
		return ret;
		}

		static int f2fs_ioc_get_compress_option(struct file *filp, unsigned long arg)
		{
		struct inode *inode = file_inode(filp);
		struct f2fs_comp_option option;

		if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
		return -EOPNOTSUPP;

		inode_lock_shared(inode);

		if (!f2fs_compressed_file(inode)) {
		inode_unlock_shared(inode);
		return -ENODATA;
		}

		option.algorithm = F2FS_I(inode)->i_compress_algorithm;
		option.log_cluster_size = F2FS_I(inode)->i_log_cluster_size;

		inode_unlock_shared(inode);

		if (copy_to_user((struct f2fs_comp_option __user *)arg, &option,
		sizeof(option)))
		return -EFAULT;

		return 0;
		}

		long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
		{
		if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
		@@ -4033,6 +4060,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
		return f2fs_reserve_compress_blocks(filp, arg);
		case F2FS_IOC_SEC_TRIM_FILE:
		return f2fs_sec_trim_file(filp, arg);
		case F2FS_IOC_GET_COMPRESS_OPTION:
		return f2fs_ioc_get_compress_option(filp, arg);
		default:
		return -ENOTTY;
		}
		@@ -4203,6 +4232,7 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
		case F2FS_IOC_RELEASE_COMPRESS_BLOCKS:
		case F2FS_IOC_RESERVE_COMPRESS_BLOCKS:
		case F2FS_IOC_SEC_TRIM_FILE:
		case F2FS_IOC_GET_COMPRESS_OPTION:
		break;
		default:
		return -ENOIOCTLCMD;

+7 −0

Original line number	Diff line number	Diff line
		@@ -36,6 +36,8 @@
		_IOR(F2FS_IOCTL_MAGIC, 19, __u64)
		#define F2FS_IOC_SEC_TRIM_FILE _IOW(F2FS_IOCTL_MAGIC, 20, \
		struct f2fs_sectrim_range)
		#define F2FS_IOC_GET_COMPRESS_OPTION _IOR(F2FS_IOCTL_MAGIC, 21, \
		struct f2fs_comp_option)

		/*
		* should be same as XFS_IOC_GOINGDOWN.
		@@ -84,4 +86,9 @@ struct f2fs_sectrim_range {
		__u64 flags;
		};

		struct f2fs_comp_option {
		__u8 algorithm;
		__u8 log_cluster_size;
		};

		#endif /* _UAPI_LINUX_F2FS_H */