diff options
Diffstat (limited to 'net/openvswitch/actions.c')
| -rw-r--r-- | net/openvswitch/actions.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c index 0811447..ac2defe 100644 --- a/net/openvswitch/actions.c +++ b/net/openvswitch/actions.c @@ -28,6 +28,7 @@ #include <linux/if_arp.h> #include <linux/if_vlan.h> #include <net/ip.h> +#include <net/ipv6.h> #include <net/checksum.h> #include <net/dsfield.h> @@ -162,6 +163,53 @@ static void set_ip_addr(struct sk_buff *skb, struct iphdr *nh, *addr = new_addr; } +static void update_ipv6_checksum(struct sk_buff *skb, u8 l4_proto, + __be32 addr[4], const __be32 new_addr[4]) +{ + int transport_len = skb->len - skb_transport_offset(skb); + + if (l4_proto == IPPROTO_TCP) { + if (likely(transport_len >= sizeof(struct tcphdr))) + inet_proto_csum_replace16(&tcp_hdr(skb)->check, skb, + addr, new_addr, 1); + } else if (l4_proto == IPPROTO_UDP) { + if (likely(transport_len >= sizeof(struct udphdr))) { + struct udphdr *uh = udp_hdr(skb); + + if (uh->check || skb->ip_summed == CHECKSUM_PARTIAL) { + inet_proto_csum_replace16(&uh->check, skb, + addr, new_addr, 1); + if (!uh->check) + uh->check = CSUM_MANGLED_0; + } + } + } +} + +static void set_ipv6_addr(struct sk_buff *skb, u8 l4_proto, + __be32 addr[4], const __be32 new_addr[4], + bool recalculate_csum) +{ + if (recalculate_csum) + update_ipv6_checksum(skb, l4_proto, addr, new_addr); + + skb->rxhash = 0; + memcpy(addr, new_addr, sizeof(__be32[4])); +} + +static void set_ipv6_tc(struct ipv6hdr *nh, u8 tc) +{ + nh->priority = tc >> 4; + nh->flow_lbl[0] = (nh->flow_lbl[0] & 0x0F) | ((tc & 0x0F) << 4); +} + +static void set_ipv6_fl(struct ipv6hdr *nh, u32 fl) +{ + nh->flow_lbl[0] = (nh->flow_lbl[0] & 0xF0) | (fl & 0x000F0000) >> 16; + nh->flow_lbl[1] = (fl & 0x0000FF00) >> 8; + nh->flow_lbl[2] = fl & 0x000000FF; +} + static void set_ip_ttl(struct sk_buff *skb, struct iphdr *nh, u8 new_ttl) { csum_replace2(&nh->check, htons(nh->ttl << 8), htons(new_ttl << 8)); @@ -195,6 +243,47 @@ static int set_ipv4(struct sk_buff *skb, const struct ovs_key_ipv4 *ipv4_key) return 0; } +static int set_ipv6(struct sk_buff *skb, const struct ovs_key_ipv6 *ipv6_key) +{ + struct ipv6hdr *nh; + int err; + __be32 *saddr; + __be32 *daddr; + + err = make_writable(skb, skb_network_offset(skb) + + sizeof(struct ipv6hdr)); + if (unlikely(err)) + return err; + + nh = ipv6_hdr(skb); + saddr = (__be32 *)&nh->saddr; + daddr = (__be32 *)&nh->daddr; + + if (memcmp(ipv6_key->ipv6_src, saddr, sizeof(ipv6_key->ipv6_src))) + set_ipv6_addr(skb, ipv6_key->ipv6_proto, saddr, + ipv6_key->ipv6_src, true); + + if (memcmp(ipv6_key->ipv6_dst, daddr, sizeof(ipv6_key->ipv6_dst))) { + unsigned int offset = 0; + int flags = IP6_FH_F_SKIP_RH; + bool recalc_csum = true; + + if (ipv6_ext_hdr(nh->nexthdr)) + recalc_csum = ipv6_find_hdr(skb, &offset, + NEXTHDR_ROUTING, NULL, + &flags) != NEXTHDR_ROUTING; + + set_ipv6_addr(skb, ipv6_key->ipv6_proto, daddr, + ipv6_key->ipv6_dst, recalc_csum); + } + + set_ipv6_tc(nh, ipv6_key->ipv6_tclass); + set_ipv6_fl(nh, ntohl(ipv6_key->ipv6_label)); + nh->hop_limit = ipv6_key->ipv6_hlimit; + + return 0; +} + /* Must follow make_writable() since that can move the skb data. */ static void set_tp_port(struct sk_buff *skb, __be16 *port, __be16 new_port, __sum16 *check) @@ -339,6 +428,10 @@ static int execute_set_action(struct sk_buff *skb, skb->priority = nla_get_u32(nested_attr); break; + case OVS_KEY_ATTR_SKB_MARK: + skb->mark = nla_get_u32(nested_attr); + break; + case OVS_KEY_ATTR_ETHERNET: err = set_eth_addr(skb, nla_data(nested_attr)); break; @@ -347,6 +440,10 @@ static int execute_set_action(struct sk_buff *skb, err = set_ipv4(skb, nla_data(nested_attr)); break; + case OVS_KEY_ATTR_IPV6: + err = set_ipv6(skb, nla_data(nested_attr)); + break; + case OVS_KEY_ATTR_TCP: err = set_tcp(skb, nla_data(nested_attr)); break; |
