Dan Smith wrote:

This patch adds AF_INET c/r support based on the framework established in
my AF_UNIX patch.  I've tested it by checkpointing a single app with a
pair of sockets connected over loopback.

+struct ckpt_hdr_socket_inet {
+	struct ckpt_hdr h;
+
+	__u32 daddr;
+	__u32 rcv_saddr;
+	__u32 saddr;
+	__u16 dport;
+	__u16 num;
+	__u16 sport;
+	__s16 uc_ttl;
+	__u16 cmsg_flags;
+	__u16 __pad;
+
+	struct {
+		__u64 timeout;
+		__u32 ato;
+		__u32 lrcvtime;
+		__u16 last_seg_size;
+		__u16 rcv_mss;
+		__u8 pending;
+		__u8 quick;
+		__u8 pingpong;
+		__u8 blocked;
+	} icsk_ack __attribute__ ((aligned(8)));
+
+	/* FIXME: Skipped opt, tos, multicast, cork settings */
+

<snip>

+
+	struct {
+		char saddr[16];
+		char rcv_saddr[16];
+		char daddr[16];
+	} inet6 __attribute__ ((aligned(8)));

These should be 'struct in6_addr'.

And just like in your IPv4 section you need a FIXME here for the things
you skipped :)

+static int sock_inet_cptrst(struct ckpt_ctx *ctx,
+			    struct sock *sock,
+			    struct ckpt_hdr_socket_inet *hh,
+			  int op)
+{

<snip>

+
+	if (sock->sk_family == AF_INET6) {
+		struct ipv6_pinfo *inet6 = inet6_sk(sock);
+		unsigned alen = sizeof(struct in6_addr);
+		if (op == CKPT_CPT) {
+			memcpy(hh->inet6.saddr, &inet6->saddr, alen);
+			memcpy(hh->inet6.rcv_saddr, &inet6->rcv_saddr, alen);
+			memcpy(hh->inet6.daddr, &inet6->daddr, alen);
+		} else {
+			memcpy(&inet6->saddr, hh->inet6.saddr, alen);
+			memcpy(&inet6->rcv_saddr, hh->inet6.rcv_saddr, alen);
+			memcpy(&inet6->daddr, hh->inet6.daddr, alen);
+		}
+	}

There's an inline called ipv6_addr_copy() that will do the same thing,
then you could drop the alen argument.

-Brian