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

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: