patch-1.3.68 linux/drivers/block/loop.h

• Lines: 78
• Date: Thu Feb 22 14:40:01 1996
• Orig file: v1.3.67/linux/drivers/block/loop.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.67/linux/drivers/block/loop.h linux/drivers/block/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;
+	kdev_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	5
+#define MAX_LO_CRYPT	4
+
+/*
+ * 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