Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / net / core / flow_dissector.c

diff --git a/kernel/net/core/flow_dissector.c b/kernel/net/core/flow_dissector.c
index 12e7003..ee90827 100644 (file)
--- a/kernel/net/core/flow_dissector.c
+++ b/kernel/net/core/flow_dissector.c
@@ -131,7 +131,7 @@ bool __skb_flow_dissect(const struct sk_buff *skb,
        struct flow_dissector_key_tags *key_tags;
        struct flow_dissector_key_keyid *key_keyid;
        u8 ip_proto = 0;
-       bool ret = false;
+       bool ret;
 
        if (!data) {
                data = skb->data;
@@ -492,12 +492,17 @@ ip_proto_again:
 out_good:
        ret = true;
 
-out_bad:
+       key_control->thoff = (u16)nhoff;
+out:
        key_basic->n_proto = proto;
        key_basic->ip_proto = ip_proto;
-       key_control->thoff = (u16)nhoff;
 
        return ret;
+
+out_bad:
+       ret = false;
+       key_control->thoff = min_t(u16, nhoff, skb ? skb->len : hlen);
+       goto out;
 }
 EXPORT_SYMBOL(__skb_flow_dissect);
 
@@ -662,6 +667,23 @@ void make_flow_keys_digest(struct flow_keys_digest *digest,
 }
 EXPORT_SYMBOL(make_flow_keys_digest);
 
+static struct flow_dissector flow_keys_dissector_symmetric __read_mostly;
+
+u32 __skb_get_hash_symmetric(struct sk_buff *skb)
+{
+       struct flow_keys keys;
+
+       __flow_hash_secret_init();
+
+       memset(&keys, 0, sizeof(keys));
+       __skb_flow_dissect(skb, &flow_keys_dissector_symmetric, &keys,
+                          NULL, 0, 0, 0,
+                          FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL);
+
+       return __flow_hash_from_keys(&keys, hashrnd);
+}
+EXPORT_SYMBOL_GPL(__skb_get_hash_symmetric);
+
 /**
  * __skb_get_hash: calculate a flow hash
  * @skb: sk_buff to calculate flow hash from
@@ -874,6 +896,29 @@ static const struct flow_dissector_key flow_keys_dissector_keys[] = {
        },
 };
 
+static const struct flow_dissector_key flow_keys_dissector_symmetric_keys[] = {
+       {
+               .key_id = FLOW_DISSECTOR_KEY_CONTROL,
+               .offset = offsetof(struct flow_keys, control),
+       },
+       {
+               .key_id = FLOW_DISSECTOR_KEY_BASIC,
+               .offset = offsetof(struct flow_keys, basic),
+       },
+       {
+               .key_id = FLOW_DISSECTOR_KEY_IPV4_ADDRS,
+               .offset = offsetof(struct flow_keys, addrs.v4addrs),
+       },
+       {
+               .key_id = FLOW_DISSECTOR_KEY_IPV6_ADDRS,
+               .offset = offsetof(struct flow_keys, addrs.v6addrs),
+       },
+       {
+               .key_id = FLOW_DISSECTOR_KEY_PORTS,
+               .offset = offsetof(struct flow_keys, ports),
+       },
+};
+
 static const struct flow_dissector_key flow_keys_buf_dissector_keys[] = {
        {
                .key_id = FLOW_DISSECTOR_KEY_CONTROL,
@@ -895,10 +940,13 @@ static int __init init_default_flow_dissectors(void)
        skb_flow_dissector_init(&flow_keys_dissector,
                                flow_keys_dissector_keys,
                                ARRAY_SIZE(flow_keys_dissector_keys));
+       skb_flow_dissector_init(&flow_keys_dissector_symmetric,
+                               flow_keys_dissector_symmetric_keys,
+                               ARRAY_SIZE(flow_keys_dissector_symmetric_keys));
        skb_flow_dissector_init(&flow_keys_buf_dissector,
                                flow_keys_buf_dissector_keys,
                                ARRAY_SIZE(flow_keys_buf_dissector_keys));
        return 0;
 }
 
-late_initcall_sync(init_default_flow_dissectors);
+core_initcall(init_default_flow_dissectors);