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Message-Id: <1428692430-14465-6-git-send-email-xiyou.wangcong@gmail.com>
Date: Fri, 10 Apr 2015 12:00:30 -0700
From: Cong Wang <xiyou.wangcong@...il.com>
To: netdev@...r.kernel.org
Cc: Tom Herbert <tom@...bertland.com>,
Cong Wang <xiyou.wangcong@...il.com>
Subject: [Patch net-next v2 5/5] fou: implement FOU_CMD_GET
Cc: Tom Herbert <tom@...bertland.com>
Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>
---
include/uapi/linux/fou.h | 1 +
net/ipv4/fou.c | 109 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 110 insertions(+)
diff --git a/include/uapi/linux/fou.h b/include/uapi/linux/fou.h
index c303588..d2947c5 100644
--- a/include/uapi/linux/fou.h
+++ b/include/uapi/linux/fou.h
@@ -25,6 +25,7 @@ enum {
FOU_CMD_UNSPEC,
FOU_CMD_ADD,
FOU_CMD_DEL,
+ FOU_CMD_GET,
__FOU_CMD_MAX,
};
diff --git a/net/ipv4/fou.c b/net/ipv4/fou.c
index c244b1a..2637102 100644
--- a/net/ipv4/fou.c
+++ b/net/ipv4/fou.c
@@ -21,6 +21,7 @@ struct fou {
u8 protocol;
u8 flags;
__be16 port;
+ u16 type;
struct udp_offload udp_offloads;
struct list_head list;
};
@@ -487,6 +488,8 @@ static int fou_create(struct net *net, struct fou_cfg *cfg,
goto error;
}
+ fou->type = cfg->type;
+
udp_sk(sk)->encap_type = 1;
udp_encap_enable();
@@ -617,6 +620,106 @@ static int fou_nl_cmd_rm_port(struct sk_buff *skb, struct genl_info *info)
return fou_destroy(net, &cfg);
}
+static int fou_fill_info(struct fou *fou, struct sk_buff *msg)
+{
+ if (nla_put_u8(msg, FOU_ATTR_AF, fou->sock->sk->sk_family) ||
+ nla_put_be16(msg, FOU_ATTR_PORT, fou->port) ||
+ nla_put_u8(msg, FOU_ATTR_IPPROTO, fou->protocol) ||
+ nla_put_u8(msg, FOU_ATTR_TYPE, fou->type))
+ return -1;
+
+ if (fou->flags & FOU_F_REMCSUM_NOPARTIAL)
+ if (nla_put_flag(msg, FOU_ATTR_REMCSUM_NOPARTIAL))
+ return -1;
+ return 0;
+}
+
+static int fou_dump_info(struct fou *fou, u32 portid, u32 seq,
+ u32 flags, struct sk_buff *skb, u8 cmd)
+{
+ void *hdr;
+
+ hdr = genlmsg_put(skb, portid, seq, &fou_nl_family, flags, cmd);
+ if (!hdr)
+ return -ENOMEM;
+
+ if (fou_fill_info(fou, skb) < 0)
+ goto nla_put_failure;
+
+ genlmsg_end(skb, hdr);
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(skb, hdr);
+ return -EMSGSIZE;
+}
+
+static int fou_nl_cmd_get_port(struct sk_buff *skb, struct genl_info *info)
+{
+ struct net *net = genl_info_net(info);
+ struct fou_net *fn = net_generic(net, fou_net_id);
+ struct sk_buff *msg;
+ struct fou_cfg cfg;
+ struct fou *fout;
+ __be16 port;
+ int ret;
+
+ ret = parse_nl_config(info, &cfg);
+ if (ret)
+ return ret;
+ port = cfg.udp_config.local_udp_port;
+ if (port == 0)
+ return -EINVAL;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ ret = -ESRCH;
+ mutex_lock(&fn->fou_lock);
+ list_for_each_entry(fout, &fn->fou_list, list) {
+ if (port == fout->port) {
+ ret = fou_dump_info(fout, info->snd_portid,
+ info->snd_seq, 0, msg,
+ info->genlhdr->cmd);
+ break;
+ }
+ }
+ mutex_unlock(&fn->fou_lock);
+ if (ret < 0)
+ goto out_free;
+
+ return genlmsg_reply(msg, info);
+
+out_free:
+ nlmsg_free(msg);
+ return ret;
+}
+
+static int fou_nl_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct net *net = sock_net(skb->sk);
+ struct fou_net *fn = net_generic(net, fou_net_id);
+ struct fou *fout;
+ int idx = 0, ret;
+
+ mutex_lock(&fn->fou_lock);
+ list_for_each_entry(fout, &fn->fou_list, list) {
+ if (idx++ < cb->args[0])
+ continue;
+ ret = fou_dump_info(fout, NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, NLM_F_MULTI,
+ skb, FOU_CMD_GET);
+ if (ret)
+ goto done;
+ }
+ mutex_unlock(&fn->fou_lock);
+
+done:
+ cb->args[0] = idx;
+ return skb->len;
+}
+
static const struct genl_ops fou_nl_ops[] = {
{
.cmd = FOU_CMD_ADD,
@@ -630,6 +733,12 @@ static const struct genl_ops fou_nl_ops[] = {
.policy = fou_nl_policy,
.flags = GENL_ADMIN_PERM,
},
+ {
+ .cmd = FOU_CMD_GET,
+ .doit = fou_nl_cmd_get_port,
+ .dumpit = fou_nl_dump,
+ .policy = fou_nl_policy,
+ },
};
size_t fou_encap_hlen(struct ip_tunnel_encap *e)
--
1.8.3.1
--
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