diff options
Diffstat (limited to 'uapi/linux')
| -rw-r--r-- | uapi/linux/loop.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/uapi/linux/loop.h b/uapi/linux/loop.h new file mode 100644 index 0000000..f93f6ad --- /dev/null +++ b/uapi/linux/loop.h @@ -0,0 +1,125 @@ +/* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */ +/* + * include/linux/loop.h + * + * Written by Theodore Ts'o, 3/29/93. + * + * Copyright 1993 by Theodore Ts'o. Redistribution of this file is + * permitted under the GNU General Public License. + */ +#ifndef _UAPI_LINUX_XLOOP_H +#define _UAPI_LINUX_XLOOP_H + + +#define XLO_NAME_SIZE 64 +#define XLO_KEY_SIZE 32 + + +/* + * xloop flags + */ +enum { + XLO_FLAGS_READ_ONLY = 1, + XLO_FLAGS_AUTOCLEAR = 4, + XLO_FLAGS_PARTSCAN = 8, + XLO_FLAGS_DIRECT_IO = 16, +}; + +/* XLO_FLAGS that can be set using XLOOP_SET_STATUS(64) */ +#define XLOOP_SET_STATUS_SETTABLE_FLAGS (XLO_FLAGS_AUTOCLEAR | XLO_FLAGS_PARTSCAN) + +/* XLO_FLAGS that can be cleared using XLOOP_SET_STATUS(64) */ +#define XLOOP_SET_STATUS_CLEARABLE_FLAGS (XLO_FLAGS_AUTOCLEAR) + +/* XLO_FLAGS that can be set using XLOOP_CONFIGURE */ +#define XLOOP_CONFIGURE_SETTABLE_FLAGS (XLO_FLAGS_READ_ONLY | XLO_FLAGS_AUTOCLEAR \ + | XLO_FLAGS_PARTSCAN | XLO_FLAGS_DIRECT_IO) + +#include <asm/posix_types.h> /* for __kernel_old_dev_t */ +#include <linux/types.h> /* for __u64 */ + +/* Backwards compatibility version */ +struct xloop_info { + int xlo_number; /* ioctl r/o */ + __kernel_old_dev_t xlo_device; /* ioctl r/o */ + unsigned long xlo_inode; /* ioctl r/o */ + __kernel_old_dev_t xlo_rdevice; /* ioctl r/o */ + int xlo_offset; + int xlo_encrypt_type; + int xlo_encrypt_key_size; /* ioctl w/o */ + int xlo_flags; + char xlo_name[XLO_NAME_SIZE]; + unsigned char xlo_encrypt_key[XLO_KEY_SIZE]; /* ioctl w/o */ + unsigned long xlo_init[2]; + char reserved[4]; + int xlo_file_fmt_type; +}; + +struct xloop_info64 { + __u64 xlo_device; /* ioctl r/o */ + __u64 xlo_inode; /* ioctl r/o */ + __u64 xlo_rdevice; /* ioctl r/o */ + __u64 xlo_offset; + __u64 xlo_sizelimit; /* bytes, 0 == max available */ + __u32 xlo_number; /* ioctl r/o */ + __u32 xlo_encrypt_type; + __u32 xlo_encrypt_key_size; /* ioctl w/o */ + __u32 xlo_flags; + __u8 xlo_file_name[XLO_NAME_SIZE]; + __u8 xlo_crypt_name[XLO_NAME_SIZE]; + __u8 xlo_encrypt_key[XLO_KEY_SIZE]; /* ioctl w/o */ + __u64 xlo_init[2]; + __u32 xlo_file_fmt_type; +}; + +/** + * struct xloop_config - Complete configuration for a xloop device. + * @fd: fd of the file to be used as a backing file for the xloop device. + * @block_size: block size to use; ignored if 0. + * @info: struct xloop_info64 to configure the xloop device with. + * + * This structure is used with the XLOOP_CONFIGURE ioctl, and can be used to + * atomically setup and configure all xloop device parameters at once. + */ +struct xloop_config { + __u32 fd; + __u32 block_size; + struct xloop_info64 info; + __u64 __reserved[8]; +}; + +/* + * xloop filter types + */ +#define XLO_CRYPT_NONE 0 +#define XLO_CRYPT_XOR 1 +#define XLO_CRYPT_DES 2 +#define XLO_CRYPT_FISH2 3 /* Twofish encryption */ +#define XLO_CRYPT_BLOW 4 +#define XLO_CRYPT_CAST128 5 +#define XLO_CRYPT_IDEA 6 +#define XLO_CRYPT_DUMMY 9 +#define XLO_CRYPT_SKIPJACK 10 +#define XLO_CRYPT_CRYPTOAPI 18 +#define MAX_XLO_CRYPT 20 + +/* + * IOCTL commands --- we will commandeer 0x4C ('L') + */ +#define XLOOP_SET_FD 0x4C00 +#define XLOOP_CLR_FD 0x4C01 +#define XLOOP_SET_STATUS 0x4C02 +#define XLOOP_GET_STATUS 0x4C03 +#define XLOOP_SET_STATUS64 0x4C04 +#define XLOOP_GET_STATUS64 0x4C05 +#define XLOOP_CHANGE_FD 0x4C06 +#define XLOOP_SET_CAPACITY 0x4C07 +#define XLOOP_SET_DIRECT_IO 0x4C08 +#define XLOOP_SET_BLOCK_SIZE 0x4C09 +#define XLOOP_CONFIGURE 0x4C0A + +/* /dev/xloop-control interface */ +#define XLOOP_CTL_ADD 0x4C80 +#define XLOOP_CTL_REMOVE 0x4C81 +#define XLOOP_CTL_GET_FREE 0x4C82 +#endif /* _UAPI_LINUX_XLOOP_H */ |