netdev - [PATCH 5/6] C/R: Add a checkpoint handler to the 'sit' device

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1267130595-23637-6-git-send-email-danms@us.ibm.com>
Date:	Thu, 25 Feb 2010 12:43:14 -0800
From:	Dan Smith <danms@...ibm.com>
To:	containers@...ts.osdl.org
Cc:	benjamin.thery@...l.net, den@...nvz.org, ebiederm@...ssion.com,
	davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 5/6] C/R: Add a checkpoint handler to the 'sit' device

This handler doesn't really do much to checkpoint the device, other
than the minimum required to support the restart process.  When we
add IPv6 support to this, then we can fill this out.

This allows us to avoid skipping unsupported interfaces on a normal
system.

Signed-off-by: Dan Smith <danms@...ibm.com>
---
 net/ipv6/sit.c |   34 ++++++++++++++++++++++++++++++++++
 1 files changed, 34 insertions(+), 0 deletions(-)

diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 976e682..cf9fcb8 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -32,6 +32,8 @@
 #include <linux/init.h>
 #include <linux/netfilter_ipv4.h>
 #include <linux/if_ether.h>
+#include <linux/checkpoint.h>
+#include <linux/checkpoint_hdr.h>
 
 #include <net/sock.h>
 #include <net/snmp.h>
@@ -1085,11 +1087,43 @@ static int ipip6_tunnel_change_mtu(struct net_device *dev, int new_mtu)
 	return 0;
 }
 
+#ifdef CONFIG_CHECKPOINT
+static int ipip6_checkpoint(struct ckpt_ctx *ctx, struct net_device *dev)
+{
+	struct ckpt_hdr_netdev *h;
+	struct ckpt_netdev_addr *addrs;
+	int ret;
+
+	h = ckpt_netdev_base(ctx, dev, &addrs);
+	if (IS_ERR(h))
+		return PTR_ERR(h);
+
+	h->type = CKPT_NETDEV_SIT;
+
+	ret = ckpt_write_obj(ctx, (struct ckpt_hdr *) h);
+	if (ret < 0)
+		goto out;
+
+	if (h->inet_addrs > 0) {
+		int len = (sizeof(struct ckpt_netdev_addr) * h->inet_addrs);
+		ret = ckpt_write_buffer(ctx, addrs, len);
+	}
+ out:
+	ckpt_hdr_put(ctx, h);
+	kfree(addrs);
+
+	return ret;
+}
+#endif
+
 static const struct net_device_ops ipip6_netdev_ops = {
 	.ndo_uninit	= ipip6_tunnel_uninit,
 	.ndo_start_xmit	= ipip6_tunnel_xmit,
 	.ndo_do_ioctl	= ipip6_tunnel_ioctl,
 	.ndo_change_mtu	= ipip6_tunnel_change_mtu,
+#ifdef CONFIG_CHECKPOINT
+	.ndo_checkpoint	= ipip6_checkpoint,
+#endif
 };
 
 static void ipip6_tunnel_setup(struct net_device *dev)
-- 
1.6.2.5

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html