commit b3d936f3ea1c97c32680e0cd235474cf9dadb762
author Cong Wang <amwang@redhat.com> Mon Jan 07 20:52:41 2013 +0000
committer David S. Miller <davem@davemloft.net> Tue Jan 08 17:56:10 2013 -0800
tree 55231f53fa50114417709a1cc2623f124bcba1f0
parent acb3e04119fbf9145eb6d6bb707f6fb662ab4d3b

netpoll: add IPv6 support

Currently, netpoll only supports IPv4. This patch adds IPv6
support to netpoll so that we can run netconsole over IPv6 network.

Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/netconsole.c

diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index 998fa02..37add21 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -269,13 +269,17 @@
 
 static ssize_t show_local_ip(struct netconsole_target *nt, char *buf)
 {
-	if (!nt->np.ipv6)
+	if (nt->np.ipv6)
+		return snprintf(buf, PAGE_SIZE, "%pI6c\n", &nt->np.local_ip.in6);
+	else
 		return snprintf(buf, PAGE_SIZE, "%pI4\n", &nt->np.local_ip);
 }
 
 static ssize_t show_remote_ip(struct netconsole_target *nt, char *buf)
 {
-	if (!nt->np.ipv6)
+	if (nt->np.ipv6)
+		return snprintf(buf, PAGE_SIZE, "%pI6c\n", &nt->np.remote_ip.in6);
+	else
 		return snprintf(buf, PAGE_SIZE, "%pI4\n", &nt->np.remote_ip);
 }
 
@@ -412,8 +416,22 @@
 		return -EINVAL;
 	}
 
-	if (!strnchr(buf, count, ':'))
-		nt->np.local_ip.ip = in_aton(buf);
+	if (strnchr(buf, count, ':')) {
+		const char *end;
+		if (in6_pton(buf, count, nt->np.local_ip.in6.s6_addr, -1, &end) > 0) {
+			if (*end && *end != '\n') {
+				printk(KERN_ERR "netconsole: invalid IPv6 address at: <%c>\n", *end);
+				return -EINVAL;
+			}
+			nt->np.ipv6 = true;
+		} else
+			return -EINVAL;
+	} else {
+		if (!nt->np.ipv6) {
+			nt->np.local_ip.ip = in_aton(buf);
+		} else
+			return -EINVAL;
+	}
 
 	return strnlen(buf, count);
 }
@@ -429,8 +447,22 @@
 		return -EINVAL;
 	}
 
-	if (!strnchr(buf, count, ':'))
-		nt->np.remote_ip.ip = in_aton(buf);
+	if (strnchr(buf, count, ':')) {
+		const char *end;
+		if (in6_pton(buf, count, nt->np.remote_ip.in6.s6_addr, -1, &end) > 0) {
+			if (*end && *end != '\n') {
+				printk(KERN_ERR "netconsole: invalid IPv6 address at: <%c>\n", *end);
+				return -EINVAL;
+			}
+			nt->np.ipv6 = true;
+		} else
+			return -EINVAL;
+	} else {
+		if (!nt->np.ipv6) {
+			nt->np.remote_ip.ip = in_aton(buf);
+		} else
+			return -EINVAL;
+	}
 
 	return strnlen(buf, count);
 }