diff options
Diffstat (limited to 'mount/loop.h')
| -rw-r--r-- | mount/loop.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/mount/loop.h b/mount/loop.h new file mode 100644 index 000000000..81ee7611e --- /dev/null +++ b/mount/loop.h @@ -0,0 +1,77 @@ +#ifndef _LINUX_LOOP_H +#define _LINUX_LOOP_H + +/* + * 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 Public License. + */ + +#define LO_NAME_SIZE 64 +#define LO_KEY_SIZE 32 + +struct loop_device { + int lo_number; + struct inode *lo_inode; + int lo_refcnt; + dev_t lo_device; + int lo_offset; + int lo_encrypt_type; + int lo_encrypt_key_size; + int lo_flags; + int (*transfer)(struct loop_device *, int cmd, + char *raw_buf, char *loop_buf, int size); + char lo_name[LO_NAME_SIZE]; + char lo_encrypt_key[LO_KEY_SIZE]; +#ifdef DES_AVAILABLE + des_key_schedule lo_des_key; + unsigned long lo_des_init[2]; +#endif +}; + +typedef int (* transfer_proc_t)(struct loop_device *, int cmd, + char *raw_buf, char *loop_buf, int size); + +/* + * Loop flags + */ +#define LO_FLAGS_DO_BMAP 0x00000001 + +struct loop_info { + int lo_number; /* ioctl r/o */ + dev_t lo_device; /* ioctl r/o */ + unsigned long lo_inode; /* ioctl r/o */ + dev_t lo_rdevice; /* ioctl r/o */ + int lo_offset; + int lo_encrypt_type; + int lo_encrypt_key_size; /* ioctl w/o */ + int lo_flags; /* ioctl r/o */ + char lo_name[LO_NAME_SIZE]; + unsigned char lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */ + unsigned long lo_init[2]; + char reserved[4]; +}; + +/* + * Loop encryption types --- LO_CRYPT_IDEA isn't supported yet + */ + +#define LO_CRYPT_NONE 0 +#define LO_CRYPT_XOR 1 +#define LO_CRYPT_DES 2 +#define LO_CRYPT_IDEA 4 +#define MAX_LO_CRYPT 3 + +/* + * IOCTL commands --- we will commandeer 0x4C ('L') + */ + +#define LOOP_SET_FD 0x4C00 +#define LOOP_CLR_FD 0x4C01 +#define LOOP_SET_STATUS 0x4C02 +#define LOOP_GET_STATUS 0x4C03 + +#endif |