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From: Dan Smith <danms@us.ibm.com>
To: containers@lists.osdl.org
Cc: netdev@vger.kernel.org
Subject: [PATCH 4/4] Add loopback checkpoint support
Date: Tue,  9 Feb 2010 13:25:13 -0800	[thread overview]
Message-ID: <1265750713-15749-5-git-send-email-danms@us.ibm.com> (raw)
In-Reply-To: <1265750713-15749-1-git-send-email-danms@us.ibm.com>

Adds a small ndo_checkpoint() handler for loopback devices to write the
name and addresses like other interfaces.

Signed-off-by: Dan Smith <danms@us.ibm.com>
---
 drivers/net/loopback.c |   41 ++++++++++++++++++++++++++++++++++++++---
 1 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index b9fcc98..816a527 100644
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -57,6 +57,8 @@
 #include <linux/ip.h>
 #include <linux/tcp.h>
 #include <linux/percpu.h>
+#include <linux/checkpoint.h>
+#include <linux/checkpoint_hdr.h>
 #include <net/net_namespace.h>
 
 struct pcpu_lstats {
@@ -153,10 +155,43 @@ static void loopback_dev_free(struct net_device *dev)
 	free_netdev(dev);
 }
 
+static int loopback_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_LO;
+
+	ret = ckpt_write_obj(ctx, (struct ckpt_hdr *)h);
+	if (ret < 0)
+		goto out;
+
+	ret = ckpt_write_buffer(ctx, dev->name, IFNAMSIZ);
+	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;
+}
+
 static const struct net_device_ops loopback_ops = {
-	.ndo_init      = loopback_dev_init,
-	.ndo_start_xmit= loopback_xmit,
-	.ndo_get_stats = loopback_get_stats,
+	.ndo_init       = loopback_dev_init,
+	.ndo_start_xmit = loopback_xmit,
+	.ndo_get_stats  = loopback_get_stats,
+	.ndo_checkpoint = loopback_checkpoint,
 };
 
 /*
-- 
1.6.2.5


  parent reply	other threads:[~2010-02-09 21:27 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-02-09 21:25 Network device and namespace checkpoint/restart (v2) Dan Smith
2010-02-09 21:25 ` [PATCH 1/4] Add checkpoint and collect hooks to net_device_ops Dan Smith
2010-02-09 21:25 ` [PATCH 2/4] C/R: Basic support for network namespaces and devices (v3) Dan Smith
     [not found]   ` <1265750713-15749-3-git-send-email-danms-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2010-02-10 17:24     ` Serge E. Hallyn
2010-02-10 17:38       ` Dan Smith
     [not found]         ` <87pr4dgfdz.fsf-FLMGYpZoEPULwtHQx/6qkW3U47Q5hpJU@public.gmane.org>
2010-02-10 20:01           ` Oren Laadan
2010-02-10 20:30             ` Serge E. Hallyn
2010-02-10 17:55   ` Dan Smith
2010-02-10 19:20     ` Serge E. Hallyn
2010-02-10 19:30       ` Dan Smith
2010-02-10 20:25         ` Serge E. Hallyn
2010-02-10 20:31           ` Dan Smith
2010-02-10 20:34             ` Serge E. Hallyn
     [not found]     ` <87ljf1gemh.fsf-FLMGYpZoEPULwtHQx/6qkW3U47Q5hpJU@public.gmane.org>
2010-02-11 11:02       ` Louis Rilling
2010-02-11 15:59         ` Dan Smith
2010-02-11 17:20     ` Oren Laadan
2010-02-11 17:51   ` Oren Laadan
2010-02-09 21:25 ` [PATCH 3/4] Add checkpoint support for veth devices Dan Smith
2010-02-10 17:57   ` Serge E. Hallyn
2010-02-09 21:25 ` Dan Smith [this message]
2010-02-11 17:26 ` Network device and namespace checkpoint/restart (v2) Oren Laadan

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