Adds a small ndo_checkpoint() handler for loopback devices to write the
name and addresses like other interfaces.
Changes in v2:
- Add CONFIG_CHECKPOINT around the handler
Signed-off-by: Dan Smith <danms@xxxxxxxxxx>
---
drivers/net/loopback.c | 44 +++++++++++++++++++++++++++++++++++++++++---
1 files changed, 41 insertions(+), 3 deletions(-)
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index b9fcc98..77023a7 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 +155,46 @@ static void loopback_dev_free(struct net_device *dev)
free_netdev(dev);
}
+#ifdef CONFIG_CHECKPOINT
+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;
+}
+#endif
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,
+#ifdef CONFIG_CHECKPOINT
+ .ndo_checkpoint = loopback_checkpoint,
+#endif
};
/*
--
1.6.2.5
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