linux-kernel - [PATCHv2 10/11] staging: usbip: Separate protocol/program version

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Message-Id: <1379066161-8278-11-git-send-email-dominik.paulus@fau.de>
Date:	Fri, 13 Sep 2013 11:56:00 +0200
From:	Dominik Paulus <dominik.paulus@....de>
To:	linux-kernel@...r.kernel.org
Cc:	Dominik Paulus <dominik.paulus@....de>,
	Tobias Polzer <tobias.polzer@....de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Ilija Hadzic <ihadzic@...earch.bell-labs.com>,
	Anthony Foiani <anthony.foiani@...il.com>,
	Masanari Iida <standby24x7@...il.com>,
	linux-kernel@...cs.fau.de, devel@...verdev.osuosl.org
Subject: [PATCHv2 10/11] staging: usbip: Separate protocol/program version

Not all new program versions necessarily introduce
non-backwards-compatible protocol changes. We thus move the definition
of the protocol version from configure.ac to usbip_network.h, where it
logically belongs to.

Signed-off-by: Dominik Paulus <dominik.paulus@....de>
Signed-off-by: Tobias Polzer <tobias.polzer@....de>
---
 drivers/staging/usbip/userspace/configure.ac        | 1 -
 drivers/staging/usbip/userspace/src/usbip_network.c | 6 +++---
 drivers/staging/usbip/userspace/src/usbip_network.h | 6 ++++++
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/usbip/userspace/configure.ac b/drivers/staging/usbip/userspace/configure.ac
index 7bba496..099d24b 100644
--- a/drivers/staging/usbip/userspace/configure.ac
+++ b/drivers/staging/usbip/userspace/configure.ac
@@ -2,7 +2,6 @@ dnl Process this file with autoconf to produce a configure script.
 
 AC_PREREQ(2.59)
 AC_INIT([usbip-utils], [1.1.1], [linux-usb@...r.kernel.org])
-AC_DEFINE([USBIP_VERSION], [0x00000111], [binary-coded decimal version number])
 
 CURRENT=0
 REVISION=1
diff --git a/drivers/staging/usbip/userspace/src/usbip_network.c b/drivers/staging/usbip/userspace/src/usbip_network.c
index 61cd8db..f5955c2 100644
--- a/drivers/staging/usbip/userspace/src/usbip_network.c
+++ b/drivers/staging/usbip/userspace/src/usbip_network.c
@@ -153,7 +153,7 @@ int usbip_net_send_op_common(int sockfd, uint32_t code, uint32_t status)
 
 	memset(&op_common, 0, sizeof(op_common));
 
-	op_common.version = USBIP_VERSION;
+	op_common.version = PROTOCOL_VERSION;
 	op_common.code    = code;
 	op_common.status  = status;
 
@@ -183,9 +183,9 @@ int usbip_net_recv_op_common(int sockfd, uint16_t *code)
 
 	PACK_OP_COMMON(0, &op_common);
 
-	if (op_common.version != USBIP_VERSION) {
+	if (op_common.version != PROTOCOL_VERSION) {
 		dbg("version mismatch: %d %d", op_common.version,
-		    USBIP_VERSION);
+		    PROTOCOL_VERSION);
 		return -ERR_MISMATCH;
 	}
 
diff --git a/drivers/staging/usbip/userspace/src/usbip_network.h b/drivers/staging/usbip/userspace/src/usbip_network.h
index d3c1b71..6a41fd8 100644
--- a/drivers/staging/usbip/userspace/src/usbip_network.h
+++ b/drivers/staging/usbip/userspace/src/usbip_network.h
@@ -14,6 +14,12 @@
 
 #include <stdint.h>
 
+/*
+ * Protocol version. Incremented only on non-backwards-compatible
+ * changes.
+ */
+#define PROTOCOL_VERSION 0x111
+
 extern int usbip_port;
 extern char *usbip_port_string;
 extern char *usbip_srp_password;
-- 
1.8.4

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