;;
*) AC_MSG_RESULT(no) ;;
esac
-AC_MSG_CHECKING(where to find a working nbd.h)
-AC_TRY_COMPILE([#define u32 int
-#define u64 int
-#define __be32 int
-#define __be64 int
-#include "nbd.h"
-#ifdef __GNUC__
-#define UNUSED __attribute__((__unused__))
-#else
-#define UNUSED
-#endif
-],
-[int UNUSED foo=NBD_CMD_DISC],
- [AC_DEFINE(NBD_H_LOCAL, 1, Set to 1 if a (2.6) nbd.h can be found in the current directory)
- NBD_H='"nbd.h"'],
- AC_TRY_COMPILE([#define u32 int
-#define u64 int
-#define __be32 int
-#define __be64 int
-#include <linux/nbd.h>
-#ifdef __GNUC__
-#define UNUSED __attribute__((__unused__))
-#else
-#define UNUSED
-#endif
- ],
-[int UNUSED foo=NBD_CMD_DISC],
- [AC_DEFINE(NBD_H_LINUX, 1, Set to 1 if a (2.6) nbd.h can be found in the linux directory in the search path)
- NBD_H='<linux/nbd.h>'],
- AC_TRY_COMPILE([#include <linux/nbd.h>
-#ifdef __GNUC__
-#define UNUSED __attribute__((__unused__))
-#else
-#define UNUSED
-#endif
- ],
- [int UNUSED foo=NBD_CMD_DISC],
- [AC_DEFINE(NBD_H_LINUX, 1, Set to 1 if a (2.6) nbd.h can be found in the linux directory in the search path)
- NBD_H='<linux/nbd.h>'],
- AC_MSG_ERROR(Could not find an nbd.h from 2.6 or above.)
- )
- )
-)
-if test -f nbd.h
-then
- if test "$NBD_H" = '<linux/nbd.h>'
- then
- AC_MSG_WARN([there is a local nbd.h, but it is from the 2.4-series of kernels. Using the system-provided, working, nbd.h])
- fi
-fi
-AC_MSG_RESULT($NBD_H)
AC_SEARCH_LIBS(bind, socket,, AC_MSG_ERROR([Could not find an implementation of the bind() system call]))
AC_SEARCH_LIBS(inet_ntoa, nsl,, AC_MSG_ERROR([Could not find an implementation of the inet_ntoa() system call]))
AC_SEARCH_LIBS(daemon, resolv,, AC_MSG_ERROR([Could not find an implementation of the daemon() system call]))
--- /dev/null
+/*
+ * 1999 Copyright (C) Pavel Machek, pavel@ucw.cz. This code is GPL.
+ * 1999/11/04 Copyright (C) 1999 VMware, Inc. (Regis "HPReg" Duchesne)
+ * Made nbd_end_request() use the io_request_lock
+ * 2001 Copyright (C) Steven Whitehouse
+ * New nbd_end_request() for compatibility with new linux block
+ * layer code.
+ * 2003/06/24 Louis D. Langholtz <ldl@aros.net>
+ * Removed unneeded blksize_bits field from nbd_device struct.
+ * Cleanup PARANOIA usage & code.
+ * 2004/02/19 Paul Clements
+ * Removed PARANOIA, plus various cleanup and comments
+ */
+
+#ifndef LINUX_NBD_H
+#define LINUX_NBD_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 )
+#define NBD_SET_SIZE_BLOCKS _IO( 0xab, 7 )
+#define NBD_DISCONNECT _IO( 0xab, 8 )
+
+enum {
+ NBD_CMD_READ = 0,
+ NBD_CMD_WRITE = 1,
+ NBD_CMD_DISC = 2
+};
+
+#define nbd_cmd(req) ((req)->cmd[0])
+#define MAX_NBD 128
+
+/* userspace doesn't need the nbd_device structure */
+#ifdef __KERNEL__
+
+/* values for flags field */
+#define NBD_READ_ONLY 0x0001
+#define NBD_WRITE_NOCHK 0x0002
+
+struct nbd_device {
+ int flags;
+ int harderror; /* Code of hard error */
+ struct socket * sock;
+ struct file * file; /* If == NULL, device is not ready, yet */
+ int magic;
+ spinlock_t queue_lock;
+ struct list_head queue_head;/* Requests are added here... */
+ struct semaphore tx_lock;
+ struct gendisk *disk;
+ int blksize;
+ u64 bytesize;
+};
+
+#endif
+
+/* These are sent over the network in the request/reply magic fields */
+
+#define NBD_REQUEST_MAGIC 0x25609513
+#define NBD_REPLY_MAGIC 0x67446698
+/* Do *not* use magics: 0x12560953 0x96744668. */
+
+/*
+ * This is the packet used for communication between client and
+ * server. All data are in network byte order.
+ */
+struct nbd_request {
+ u32 magic;
+ u32 type; /* == READ || == WRITE */
+ char handle[8];
+ u64 from;
+ u32 len;
+}
+#ifdef __GNUC__
+ __attribute__ ((packed))
+#endif
+;
+
+/*
+ * This is the reply packet that nbd-server sends back to the client after
+ * it has completed an I/O request (or an error occurs).
+ */
+struct nbd_reply {
+ u32 magic;
+ u32 error; /* 0 = ok, else error */
+ char handle[8]; /* handle you got from request */
+};
+#endif
+/*
+ * 1999 Copyright (C) Pavel Machek, pavel@ucw.cz. This code is GPL.
+ * 1999/11/04 Copyright (C) 1999 VMware, Inc. (Regis "HPReg" Duchesne)
+ * Made nbd_end_request() use the io_request_lock
+ * 2001 Copyright (C) Steven Whitehouse
+ * New nbd_end_request() for compatibility with new linux block
+ * layer code.
+ * 2003/06/24 Louis D. Langholtz <ldl@aros.net>
+ * Removed unneeded blksize_bits field from nbd_device struct.
+ * Cleanup PARANOIA usage & code.
+ * 2004/02/19 Paul Clements
+ * Removed PARANOIA, plus various cleanup and comments
+ */
+
+#ifndef LINUX_NBD_H
+#define LINUX_NBD_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 )
+#define NBD_SET_SIZE_BLOCKS _IO( 0xab, 7 )
+#define NBD_DISCONNECT _IO( 0xab, 8 )
+
+enum {
+ NBD_CMD_READ = 0,
+ NBD_CMD_WRITE = 1,
+ NBD_CMD_DISC = 2
+};
+
+#define nbd_cmd(req) ((req)->cmd[0])
+#define MAX_NBD 128
+
+/* userspace doesn't need the nbd_device structure */
+#ifdef __KERNEL__
+
+/* values for flags field */
+#define NBD_READ_ONLY 0x0001
+#define NBD_WRITE_NOCHK 0x0002
+
+struct nbd_device {
+ int flags;
+ int harderror; /* Code of hard error */
+ struct socket * sock;
+ struct file * file; /* If == NULL, device is not ready, yet */
+ int magic;
+ spinlock_t queue_lock;
+ struct list_head queue_head;/* Requests are added here... */
+ struct semaphore tx_lock;
+ struct gendisk *disk;
+ int blksize;
+ u64 bytesize;
+};
+
+#endif
+
+/* These are sent over the network in the request/reply magic fields */
+
+#define NBD_REQUEST_MAGIC 0x25609513
+#define NBD_REPLY_MAGIC 0x67446698
+/* Do *not* use magics: 0x12560953 0x96744668. */
+
+/*
+ * This is the packet used for communication between client and
+ * server. All data are in network byte order.
+ */
+struct nbd_request {
+ u32 magic;
+ u32 type; /* == READ || == WRITE */
+ char handle[8];
+ u64 from;
+ u32 len;
+}
+#ifdef __GNUC__
+ __attribute__ ((packed))
+#endif
+;
+
+/*
+ * This is the reply packet that nbd-server sends back to the client after
+ * it has completed an I/O request (or an error occurs).
+ */
+struct nbd_reply {
+ u32 magic;
+ u32 error; /* 0 = ok, else error */
+ char handle[8]; /* handle you got from request */
+};
+#endif
projects / nbd.git / commitdiff