rumpdisk: Add userspace disk support via librump

1 files changed, 82 insertions, 0 deletions

diff --git a/rumpdisk/ioccom-rump.h b/rumpdisk/ioccom-rump.h
new file mode 100644
index 00000000..6f41b05b
--- /dev/null
+++ b/rumpdisk/ioccom-rump.h
@@ -0,0 +1,82 @@
+/*	$NetBSD: ioccom.h,v 1.12 2014/12/10 00:16:05 christos Exp $	*/
+
+/*-
+ * Copyright (c) 1982, 1986, 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)ioccom.h	8.3 (Berkeley) 1/9/95
+ */
+
+#ifndef	_SYS_IOCCOM_H_
+#define	_SYS_IOCCOM_H_
+
+/*
+ * Ioctl's have the command encoded in the lower word, and the size of
+ * any in or out parameters in the upper word.  The high 3 bits of the
+ * upper word are used to encode the in/out status of the parameter.
+ *
+ *	 31 29 28                     16 15            8 7             0
+ *	+---------------------------------------------------------------+
+ *	| I/O | Parameter Length        | Command Group | Command       |
+ *	+---------------------------------------------------------------+
+ */
+#define	IOCPARM_MASK	0x1fff		/* parameter length, at most 13 bits */
+#define	IOCPARM_SHIFT	16
+#define	IOCGROUP_SHIFT	8
+#define	IOCPARM_LEN(x)	(((x) >> IOCPARM_SHIFT) & IOCPARM_MASK)
+#define	IOCBASECMD(x)	((x) & ~(IOCPARM_MASK << IOCPARM_SHIFT))
+#define	IOCGROUP(x)	(((x) >> IOCGROUP_SHIFT) & 0xff)
+
+#define	IOCPARM_MAX	NBPG	/* max size of ioctl args, mult. of NBPG */
+				/* no parameters */
+#define	IOC_VOID	(unsigned long)0x20000000
+				/* copy parameters out */
+#define	IOC_OUT		(unsigned long)0x40000000
+				/* copy parameters in */
+#define	IOC_IN		(unsigned long)0x80000000
+				/* copy parameters in and out */
+#define	IOC_INOUT	(IOC_IN|IOC_OUT)
+				/* mask for IN/OUT/VOID */
+#define	IOC_DIRMASK	(unsigned long)0xe0000000
+
+#define	_IOC(inout, group, num, len) \
+    ((inout) | (((len) & IOCPARM_MASK) << IOCPARM_SHIFT) | \
+    ((group) << IOCGROUP_SHIFT) | (num))
+#define	_IO(g,n)	_IOC(IOC_VOID,	(g), (n), 0)
+#define	_IOR(g,n,t)	_IOC(IOC_OUT,	(g), (n), sizeof(t))
+#define	_IOW(g,n,t)	_IOC(IOC_IN,	(g), (n), sizeof(t))
+/* this should be _IORW, but stdio got there first */
+#define	_IOWR(g,n,t)	_IOC(IOC_INOUT,	(g), (n), sizeof(t))
+
+#define IOCSNPRINTF(buf, len, cmd) \
+    snprintf((buf), (len), "_IO%s%s('%c', %hhu)", \
+	(((cmd) >> 30) & 1) ? "W" : "", \
+	(((cmd) >> 30) & 2) ? "R" : "", \
+	(char)IOCGROUP(cmd), (unsigned char)(cmd))
+		
+
+#endif /* !_SYS_IOCCOM_H_ */