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| author | Jarno Rajahalme <jrajahalme@nicira.com> | 2013-10-23 08:40:44 (GMT) |
|---|---|---|
| committer | Jesse Gross <jesse@nicira.com> | 2013-11-02 01:43:45 (GMT) |
| commit | df23e9f642830f10c505c8a3d57772ad1238c701 (patch) | |
| tree | 5b20e4e91e2a66381931bf1a35e3533274f91767 /net/openvswitch/flow.c | |
| parent | 3cdb35b074142c915a463c535839886ae08fdfd4 (diff) | |
| download | linux-df23e9f642830f10c505c8a3d57772ad1238c701.tar.xz | |
openvswitch: Widen TCP flags handling.
Widen TCP flags handling from 7 bits (uint8_t) to 12 bits (uint16_t).
The kernel interface remains at 8 bits, which makes no functional
difference now, as none of the higher bits is currently of interest
to the userspace.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
Diffstat (limited to 'net/openvswitch/flow.c')
| -rw-r--r-- | net/openvswitch/flow.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c index 617810f..b73c768 100644 --- a/net/openvswitch/flow.c +++ b/net/openvswitch/flow.c @@ -58,19 +58,17 @@ u64 ovs_flow_used_time(unsigned long flow_jiffies) return cur_ms - idle_ms; } -#define TCP_FLAGS_OFFSET 13 -#define TCP_FLAG_MASK 0x3f +#define TCP_FLAGS_BE16(tp) (*(__be16 *)&tcp_flag_word(tp) & htons(0x0FFF)) void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb) { - u8 tcp_flags = 0; + __be16 tcp_flags = 0; if ((flow->key.eth.type == htons(ETH_P_IP) || flow->key.eth.type == htons(ETH_P_IPV6)) && flow->key.ip.proto == IPPROTO_TCP && likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) { - u8 *tcp = (u8 *)tcp_hdr(skb); - tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK; + tcp_flags = TCP_FLAGS_BE16(tcp_hdr(skb)); } spin_lock(&flow->lock); |