diff options
author | Or Gerlitz <ogerlitz@mellanox.com> | 2016-12-07 15:03:10 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2016-12-08 19:32:50 +0300 |
commit | faa3ffce78298b2b782297765cffd05f52fed9d4 (patch) | |
tree | c15618f94b01a03f32192cfc5eb1743e28f55a84 /net/sched | |
parent | d26aac2d8783ab7ec94e07d412d785b3ac183606 (diff) | |
download | linux-faa3ffce78298b2b782297765cffd05f52fed9d4.tar.xz |
net/sched: cls_flower: Add support for matching on flags
Add UAPI to provide set of flags for matching, where the flags
provided from user-space are mapped to flow-dissector flags.
The 1st flag allows to match on whether the packet is an
IP fragment and corresponds to the FLOW_DIS_IS_FRAGMENT flag.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Paul Blakey <paulb@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
-rw-r--r-- | net/sched/cls_flower.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c index 29a9e6d9f274..6c7e1f5052c9 100644 --- a/net/sched/cls_flower.c +++ b/net/sched/cls_flower.c @@ -386,6 +386,8 @@ static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, }; static void fl_set_key_val(struct nlattr **tb, @@ -420,6 +422,39 @@ static void fl_set_key_vlan(struct nlattr **tb, } } +static void fl_set_key_flag(u32 flower_key, u32 flower_mask, + u32 *dissector_key, u32 *dissector_mask, + u32 flower_flag_bit, u32 dissector_flag_bit) +{ + if (flower_mask & flower_flag_bit) { + *dissector_mask |= dissector_flag_bit; + if (flower_key & flower_flag_bit) + *dissector_key |= dissector_flag_bit; + } +} + +static void fl_set_key_flags(struct nlattr **tb, + u32 *flags_key, u32 *flags_mask) +{ + u32 key, mask; + + if (!tb[TCA_FLOWER_KEY_FLAGS]) + return; + + key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); + + if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) + mask = ~0; + else + mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); + + *flags_key = 0; + *flags_mask = 0; + + fl_set_key_flag(key, mask, flags_key, flags_mask, + TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); +} + static int fl_set_key(struct net *net, struct nlattr **tb, struct fl_flow_key *key, struct fl_flow_key *mask) { @@ -546,6 +581,8 @@ 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_flags(tb, &key->control.flags, &mask->control.flags); + return 0; } @@ -880,6 +917,42 @@ static int fl_dump_key_vlan(struct sk_buff *skb, return 0; } +static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, + u32 *flower_key, u32 *flower_mask, + u32 flower_flag_bit, u32 dissector_flag_bit) +{ + if (dissector_mask & dissector_flag_bit) { + *flower_mask |= flower_flag_bit; + if (dissector_key & dissector_flag_bit) + *flower_key |= flower_flag_bit; + } +} + +static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) +{ + u32 key, mask; + __be32 _key, _mask; + int err; + + if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) + return 0; + + key = 0; + mask = 0; + + fl_get_key_flag(flags_key, flags_mask, &key, &mask, + TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); + + _key = cpu_to_be32(key); + _mask = cpu_to_be32(mask); + + err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); + if (err) + return err; + + return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); +} + static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, struct sk_buff *skb, struct tcmsg *t) { @@ -1015,6 +1088,9 @@ static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, sizeof(key->enc_tp.dst))) goto nla_put_failure; + if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) + goto nla_put_failure; + nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags); if (tcf_exts_dump(skb, &f->exts)) |