patch-2.1.67 linux/include/linux/nbd.h

• Lines: 75
• Date: Sat Nov 29 10:33:21 1997
• Orig file: v2.1.66/linux/include/linux/nbd.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.66/linux/include/linux/nbd.h linux/include/linux/nbd.h
@@ -0,0 +1,74 @@
+#ifndef LINUX_NBD_H
+#define LINUX_NBD_H
+
+#include <linux/ioctl.h>
+#include <asm/types.h>
+
+#define NBD_SET_SOCK _IO( 0xab, 0 )
+#define NBD_SET_BLKSIZE _IO( 0xab, 1 )
+#define NBD_SET_SIZE _IO( 0xab, 2 )
+#define NBD_DO_IT _IO( 0xab, 3 )
+#define NBD_CLEAR_SOCK _IO( 0xab, 4 )
+#define NBD_CLEAR_QUE _IO( 0xab, 5 )
+#define NBD_PRINT_DEBUG _IO( 0xab, 6 )
+
+#ifdef MAJOR_NR
+
+#include <linux/locks.h>
+
+#define LOCAL_END_REQUEST
+
+#include <linux/blk.h>
+
+#ifdef PARANOIA
+extern int requests_in;
+extern int requests_out;
+#endif
+
+static void 
+nbd_end_request(struct request *req)
+{
+#ifdef PARANOIA
+	requests_out++;
+#endif
+	if (end_that_request_first( req, !req->errors, "nbd" ))
+		return;
+	end_that_request_last( req );
+}
+
+#define MAX_NBD 128
+#endif
+
+struct nbd_device {
+	int refcnt;	
+	int flags;
+	int harderror;		/* Code of hard error			*/
+#define NBD_READ_ONLY 0x0001
+#define NBD_WRITE_NOCHK 0x0002
+	struct socket * sock;
+	struct file * file; 		/* If == NULL, device is not ready, yet	*/
+	int magic;			/* FIXME: not if debugging is off	*/
+	struct request *head;	/* Requests are added here...			*/
+	struct request *tail;
+};
+
+/* This now IS in some kind of include file...	*/
+
+#define NBD_REQUEST_MAGIC 0x12560953
+#define NBD_REPLY_MAGIC 0x96744668
+#define LO_MAGIC 0x68797548
+
+struct nbd_request {
+	__u32 magic;
+	__u32 from;
+	__u32 len;
+	char handle[8];
+	__u32 type;	/* == READ || == WRITE 	*/
+};
+
+struct nbd_reply {
+	__u32 magic;
+	char handle[8];		/* handle you got from request	*/
+	__u32 error;		/* 0 = ok, else error	*/
+};
+#endif