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net/sched: cls_flower: Add hash info to flow classification

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Adding new cls flower keys for hash value and hash
mask and dissect the hash info from the skb into
the flow key towards flow classication.

Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ariel Levkovich 2020-07-23 01:03:01 +03:00 committed by David S. Miller
parent 0cb09aff9d
commit 5923b8f7fa
2 changed files with 19 additions and 0 deletions
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3
include/uapi/linux/pkt_cls.h
View File

@ -578,6 +578,9 @@ enum {
TCA_FLOWER_KEY_MPLS_OPTS,
TCA_FLOWER_KEY_HASH, /* u32 */
TCA_FLOWER_KEY_HASH_MASK, /* u32 */
__TCA_FLOWER_MAX,
};

16
net/sched/cls_flower.c
View File

@ -64,6 +64,7 @@ struct fl_flow_key {
};
} tp_range;
struct flow_dissector_key_ct ct;
struct flow_dissector_key_hash hash;
} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
struct fl_flow_mask_range {
@ -318,6 +319,7 @@ static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
skb_flow_dissect_ct(skb, &mask->dissector, &skb_key,
fl_ct_info_to_flower_map,
ARRAY_SIZE(fl_ct_info_to_flower_map));
skb_flow_dissect_hash(skb, &mask->dissector, &skb_key);
skb_flow_dissect(skb, &mask->dissector, &skb_key, 0);
f = fl_mask_lookup(mask, &skb_key);
@ -695,6 +697,9 @@ static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
[TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY,
.len = 128 / BITS_PER_BYTE },
[TCA_FLOWER_FLAGS] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_HASH] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_HASH_MASK] = { .type = NLA_U32 },
};
static const struct nla_policy
@ -1626,6 +1631,10 @@ static int fl_set_key(struct net *net, struct nlattr **tb,
fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip);
fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH,
&mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK,
sizeof(key->hash.hash));
if (tb[TCA_FLOWER_KEY_ENC_OPTS]) {
ret = fl_set_enc_opt(tb, key, mask, extack);
if (ret)
@ -1740,6 +1749,8 @@ static void fl_init_dissector(struct flow_dissector *dissector,
FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_CT, ct);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_HASH, hash);
skb_flow_dissector_init(dissector, keys, cnt);
}
@ -2960,6 +2971,11 @@ static int fl_dump_key(struct sk_buff *skb, struct net *net,
if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
goto nla_put_failure;
if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH,
&mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK,
sizeof(key->hash.hash)))
goto nla_put_failure;
return 0;
nla_put_failure: