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net/sched: cls_flower: Support matching on ip tos and ttl for tunnels

Browse source 
Allow users to set rules matching on ipv4 tos and ttl or
ipv6 traffic-class and hoplimit of tunnel headers.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Or Gerlitz 2018-07-17 19:27:18 +03:00 committed by David S. Miller
parent 5544adb970
commit 0e2c17b64d
2 changed files with 33 additions and 15 deletions
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5
include/uapi/linux/pkt_cls.h
View file

@ -473,6 +473,11 @@ enum {
TCA_FLOWER_KEY_CVLAN_PRIO, /* u8 */
TCA_FLOWER_KEY_CVLAN_ETH_TYPE, /* be16 */
TCA_FLOWER_KEY_ENC_IP_TOS, /* u8 */
TCA_FLOWER_KEY_ENC_IP_TOS_MASK, /* u8 */
TCA_FLOWER_KEY_ENC_IP_TTL, /* u8 */
TCA_FLOWER_KEY_ENC_IP_TTL_MASK, /* u8 */
__TCA_FLOWER_MAX,
};

43
net/sched/cls_flower.c
View file

@ -52,6 +52,7 @@ struct fl_flow_key {
struct flow_dissector_key_mpls mpls;
struct flow_dissector_key_tcp tcp;
struct flow_dissector_key_ip ip;
struct flow_dissector_key_ip enc_ip;
} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
struct fl_flow_mask_range {
@ -453,6 +454,10 @@ static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
[TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 },
};
static void fl_set_key_val(struct nlattr **tb,
@ -561,17 +566,17 @@ static int fl_set_key_flags(struct nlattr **tb,
return 0;
}
static void fl_set_key_ip(struct nlattr **tb,
static void fl_set_key_ip(struct nlattr **tb, bool encap,
struct flow_dissector_key_ip *key,
struct flow_dissector_key_ip *mask)
{
fl_set_key_val(tb, &key->tos, TCA_FLOWER_KEY_IP_TOS,
&mask->tos, TCA_FLOWER_KEY_IP_TOS_MASK,
sizeof(key->tos));
int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
fl_set_key_val(tb, &key->ttl, TCA_FLOWER_KEY_IP_TTL,
&mask->ttl, TCA_FLOWER_KEY_IP_TTL_MASK,
sizeof(key->ttl));
fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos));
fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl));
}
static int fl_set_key(struct net *net, struct nlattr **tb,
@ -633,7 +638,7 @@ static int fl_set_key(struct net *net, struct nlattr **tb,
fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
&mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
sizeof(key->basic.ip_proto));
fl_set_key_ip(tb, &key->ip, &mask->ip);
fl_set_key_ip(tb, false, &key->ip, &mask->ip);
}
if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
@ -768,6 +773,8 @@ static int fl_set_key(struct net *net, struct nlattr **tb,
&mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
sizeof(key->enc_tp.dst));
fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip);
if (tb[TCA_FLOWER_KEY_FLAGS])
ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
@ -860,6 +867,8 @@ static void fl_init_dissector(struct fl_flow_mask *mask)
enc_control);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_ENC_IP, enc_ip);
skb_flow_dissector_init(&mask->dissector, keys, cnt);
}
@ -1208,14 +1217,17 @@ static int fl_dump_key_mpls(struct sk_buff *skb,
return 0;
}
static int fl_dump_key_ip(struct sk_buff *skb,
static int fl_dump_key_ip(struct sk_buff *skb, bool encap,
struct flow_dissector_key_ip *key,
struct flow_dissector_key_ip *mask)
{
if (fl_dump_key_val(skb, &key->tos, TCA_FLOWER_KEY_IP_TOS, &mask->tos,
TCA_FLOWER_KEY_IP_TOS_MASK, sizeof(key->tos)) ||
fl_dump_key_val(skb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, &mask->ttl,
TCA_FLOWER_KEY_IP_TTL_MASK, sizeof(key->ttl)))
int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) ||
fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)))
return -1;
return 0;
@ -1361,7 +1373,7 @@ static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
(fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
&mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
sizeof(key->basic.ip_proto)) ||
fl_dump_key_ip(skb, &key->ip, &mask->ip)))
fl_dump_key_ip(skb, false, &key->ip, &mask->ip)))
goto nla_put_failure;
if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
@ -1486,7 +1498,8 @@ static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
&mask->enc_tp.dst,
TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
sizeof(key->enc_tp.dst)))
sizeof(key->enc_tp.dst)) ||
fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip))
goto nla_put_failure;
if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))