/* * Copyright (c) 2009-2017 Nicira, Inc. * Copyright (c) 2016 Mellanox Technologies, Ltd. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include #include "tc.h" #include #include #include #include #include #include #include #include #include #include #include #include #include "byte-order.h" #include "netlink-socket.h" #include "netlink.h" #include "openvswitch/ofpbuf.h" #include "openvswitch/util.h" #include "openvswitch/vlog.h" #include "packets.h" #include "timeval.h" #include "unaligned.h" #define MAX_PEDIT_OFFSETS 32 VLOG_DEFINE_THIS_MODULE(tc); static struct vlog_rate_limit error_rl = VLOG_RATE_LIMIT_INIT(60, 5); enum tc_offload_policy { TC_POLICY_NONE, TC_POLICY_SKIP_SW, TC_POLICY_SKIP_HW }; static enum tc_offload_policy tc_policy = TC_POLICY_NONE; struct tc_pedit_key_ex { enum pedit_header_type htype; enum pedit_cmd cmd; }; struct flower_key_to_pedit { enum pedit_header_type htype; int offset; int flower_offset; int size; }; static struct flower_key_to_pedit flower_pedit_map[] = { { TCA_PEDIT_KEY_EX_HDR_TYPE_IP4, 12, offsetof(struct tc_flower_key, ipv4.ipv4_src), MEMBER_SIZEOF(struct tc_flower_key, ipv4.ipv4_src) }, { TCA_PEDIT_KEY_EX_HDR_TYPE_IP4, 16, offsetof(struct tc_flower_key, ipv4.ipv4_dst), MEMBER_SIZEOF(struct tc_flower_key, ipv4.ipv4_dst) }, { TCA_PEDIT_KEY_EX_HDR_TYPE_IP4, 8, offsetof(struct tc_flower_key, ipv4.rewrite_ttl), MEMBER_SIZEOF(struct tc_flower_key, ipv4.rewrite_ttl) }, { TCA_PEDIT_KEY_EX_HDR_TYPE_IP6, 8, offsetof(struct tc_flower_key, ipv6.ipv6_src), MEMBER_SIZEOF(struct tc_flower_key, ipv6.ipv6_src) }, { TCA_PEDIT_KEY_EX_HDR_TYPE_IP6, 24, offsetof(struct tc_flower_key, ipv6.ipv6_dst), MEMBER_SIZEOF(struct tc_flower_key, ipv6.ipv6_dst) }, { TCA_PEDIT_KEY_EX_HDR_TYPE_ETH, 6, offsetof(struct tc_flower_key, src_mac), MEMBER_SIZEOF(struct tc_flower_key, src_mac) }, { TCA_PEDIT_KEY_EX_HDR_TYPE_ETH, 0, offsetof(struct tc_flower_key, dst_mac), MEMBER_SIZEOF(struct tc_flower_key, dst_mac) }, { TCA_PEDIT_KEY_EX_HDR_TYPE_ETH, 12, offsetof(struct tc_flower_key, eth_type), MEMBER_SIZEOF(struct tc_flower_key, eth_type) }, { TCA_PEDIT_KEY_EX_HDR_TYPE_TCP, 0, offsetof(struct tc_flower_key, tcp_src), MEMBER_SIZEOF(struct tc_flower_key, tcp_src) }, { TCA_PEDIT_KEY_EX_HDR_TYPE_TCP, 2, offsetof(struct tc_flower_key, tcp_dst), MEMBER_SIZEOF(struct tc_flower_key, tcp_dst) }, { TCA_PEDIT_KEY_EX_HDR_TYPE_UDP, 0, offsetof(struct tc_flower_key, udp_src), MEMBER_SIZEOF(struct tc_flower_key, udp_src) }, { TCA_PEDIT_KEY_EX_HDR_TYPE_UDP, 2, offsetof(struct tc_flower_key, udp_dst), MEMBER_SIZEOF(struct tc_flower_key, udp_dst) }, }; static inline int csum_update_flag(struct tc_flower *flower, enum pedit_header_type htype); struct tcmsg * tc_make_request(int ifindex, int type, unsigned int flags, struct ofpbuf *request) { struct tcmsg *tcmsg; ofpbuf_init(request, 512); nl_msg_put_nlmsghdr(request, sizeof *tcmsg, type, NLM_F_REQUEST | flags); tcmsg = ofpbuf_put_zeros(request, sizeof *tcmsg); tcmsg->tcm_family = AF_UNSPEC; tcmsg->tcm_ifindex = ifindex; /* Caller should fill in tcmsg->tcm_handle. */ /* Caller should fill in tcmsg->tcm_parent. */ return tcmsg; } int tc_transact(struct ofpbuf *request, struct ofpbuf **replyp) { int error = nl_transact(NETLINK_ROUTE, request, replyp); ofpbuf_uninit(request); return error; } /* Adds or deletes a root ingress qdisc on device with specified ifindex. * * This function is equivalent to running the following when 'add' is true: * /sbin/tc qdisc add dev handle ffff: ingress * * This function is equivalent to running the following when 'add' is false: * /sbin/tc qdisc del dev handle ffff: ingress * * Where dev is the device with specified ifindex name. * * The configuration and stats may be seen with the following command: * /sbin/tc -s qdisc show dev * * Returns 0 if successful, otherwise a positive errno value. */ int tc_add_del_ingress_qdisc(int ifindex, bool add) { struct ofpbuf request; struct tcmsg *tcmsg; int error; int type = add ? RTM_NEWQDISC : RTM_DELQDISC; int flags = add ? NLM_F_EXCL | NLM_F_CREATE : 0; tcmsg = tc_make_request(ifindex, type, flags, &request); tcmsg->tcm_handle = TC_H_MAKE(TC_H_INGRESS, 0); tcmsg->tcm_parent = TC_H_INGRESS; nl_msg_put_string(&request, TCA_KIND, "ingress"); nl_msg_put_unspec(&request, TCA_OPTIONS, NULL, 0); error = tc_transact(&request, NULL); if (error) { /* If we're deleting the qdisc, don't worry about some of the * error conditions. */ if (!add && (error == ENOENT || error == EINVAL)) { return 0; } return error; } return 0; } static const struct nl_policy tca_policy[] = { [TCA_KIND] = { .type = NL_A_STRING, .optional = false, }, [TCA_OPTIONS] = { .type = NL_A_NESTED, .optional = false, }, [TCA_STATS] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct tc_stats), .optional = true, }, [TCA_STATS2] = { .type = NL_A_NESTED, .optional = true, }, }; static const struct nl_policy tca_flower_policy[] = { [TCA_FLOWER_CLASSID] = { .type = NL_A_U32, .optional = true, }, [TCA_FLOWER_INDEV] = { .type = NL_A_STRING, .max_len = IFNAMSIZ, .optional = true, }, [TCA_FLOWER_KEY_ETH_SRC] = { .type = NL_A_UNSPEC, .min_len = ETH_ALEN, .optional = true, }, [TCA_FLOWER_KEY_ETH_DST] = { .type = NL_A_UNSPEC, .min_len = ETH_ALEN, .optional = true, }, [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .type = NL_A_UNSPEC, .min_len = ETH_ALEN, .optional = true, }, [TCA_FLOWER_KEY_ETH_DST_MASK] = { .type = NL_A_UNSPEC, .min_len = ETH_ALEN, .optional = true, }, [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NL_A_U16, .optional = false, }, [TCA_FLOWER_FLAGS] = { .type = NL_A_U32, .optional = false, }, [TCA_FLOWER_ACT] = { .type = NL_A_NESTED, .optional = false, }, [TCA_FLOWER_KEY_IP_PROTO] = { .type = NL_A_U8, .optional = true, }, [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NL_A_U32, .optional = true, }, [TCA_FLOWER_KEY_IPV4_DST] = {.type = NL_A_U32, .optional = true, }, [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NL_A_U32, .optional = true, }, [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NL_A_U32, .optional = true, }, [TCA_FLOWER_KEY_IPV6_SRC] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct in6_addr), .optional = true, }, [TCA_FLOWER_KEY_IPV6_DST] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct in6_addr), .optional = true, }, [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct in6_addr), .optional = true, }, [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct in6_addr), .optional = true, }, [TCA_FLOWER_KEY_TCP_SRC] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_TCP_DST] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_UDP_SRC] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_UDP_DST] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_SCTP_DST] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_VLAN_ID] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NL_A_U8, .optional = true, }, [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NL_A_U32, .optional = true, }, [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NL_A_U32, .optional = true, }, [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NL_A_U32, .optional = true, }, [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NL_A_U32, .optional = true, }, [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NL_A_U32, .optional = true, }, [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct in6_addr), .optional = true, }, [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct in6_addr), .optional = true, }, [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct in6_addr), .optional = true, }, [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct in6_addr), .optional = true, }, [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_FLAGS] = { .type = NL_A_BE32, .optional = true, }, [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NL_A_BE32, .optional = true, }, [TCA_FLOWER_KEY_IP_TTL] = { .type = NL_A_U8, .optional = true, }, [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NL_A_U8, .optional = true, }, [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NL_A_U16, .optional = true, }, [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NL_A_U16, .optional = true, }, }; static void nl_parse_flower_eth(struct nlattr **attrs, struct tc_flower *flower) { const struct eth_addr *eth; if (attrs[TCA_FLOWER_KEY_ETH_SRC_MASK]) { eth = nl_attr_get_unspec(attrs[TCA_FLOWER_KEY_ETH_SRC], ETH_ALEN); memcpy(&flower->key.src_mac, eth, sizeof flower->key.src_mac); eth = nl_attr_get_unspec(attrs[TCA_FLOWER_KEY_ETH_SRC_MASK], ETH_ALEN); memcpy(&flower->mask.src_mac, eth, sizeof flower->mask.src_mac); } if (attrs[TCA_FLOWER_KEY_ETH_DST_MASK]) { eth = nl_attr_get_unspec(attrs[TCA_FLOWER_KEY_ETH_DST], ETH_ALEN); memcpy(&flower->key.dst_mac, eth, sizeof flower->key.dst_mac); eth = nl_attr_get_unspec(attrs[TCA_FLOWER_KEY_ETH_DST_MASK], ETH_ALEN); memcpy(&flower->mask.dst_mac, eth, sizeof flower->mask.dst_mac); } } static void nl_parse_flower_vlan(struct nlattr **attrs, struct tc_flower *flower) { if (flower->key.eth_type != htons(ETH_TYPE_VLAN)) { return; } flower->key.encap_eth_type = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_ETH_TYPE]); if (attrs[TCA_FLOWER_KEY_VLAN_ID]) { flower->key.vlan_id = nl_attr_get_u16(attrs[TCA_FLOWER_KEY_VLAN_ID]); } if (attrs[TCA_FLOWER_KEY_VLAN_PRIO]) { flower->key.vlan_prio = nl_attr_get_u8(attrs[TCA_FLOWER_KEY_VLAN_PRIO]); } } static void nl_parse_flower_tunnel(struct nlattr **attrs, struct tc_flower *flower) { if (attrs[TCA_FLOWER_KEY_ENC_KEY_ID]) { ovs_be32 id = nl_attr_get_be32(attrs[TCA_FLOWER_KEY_ENC_KEY_ID]); flower->tunnel.id = be32_to_be64(id); } if (attrs[TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK]) { flower->tunnel.ipv4.ipv4_src = nl_attr_get_be32(attrs[TCA_FLOWER_KEY_ENC_IPV4_SRC]); } if (attrs[TCA_FLOWER_KEY_ENC_IPV4_DST_MASK]) { flower->tunnel.ipv4.ipv4_dst = nl_attr_get_be32(attrs[TCA_FLOWER_KEY_ENC_IPV4_DST]); } if (attrs[TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK]) { flower->tunnel.ipv6.ipv6_src = nl_attr_get_in6_addr(attrs[TCA_FLOWER_KEY_ENC_IPV6_SRC]); } if (attrs[TCA_FLOWER_KEY_ENC_IPV6_DST_MASK]) { flower->tunnel.ipv6.ipv6_dst = nl_attr_get_in6_addr(attrs[TCA_FLOWER_KEY_ENC_IPV6_DST]); } if (attrs[TCA_FLOWER_KEY_ENC_UDP_DST_PORT]) { flower->tunnel.tp_dst = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_ENC_UDP_DST_PORT]); } } static void nl_parse_flower_ip(struct nlattr **attrs, struct tc_flower *flower) { uint8_t ip_proto = 0; struct tc_flower_key *key = &flower->key; struct tc_flower_key *mask = &flower->mask; if (attrs[TCA_FLOWER_KEY_IP_PROTO]) { ip_proto = nl_attr_get_u8(attrs[TCA_FLOWER_KEY_IP_PROTO]); key->ip_proto = ip_proto; mask->ip_proto = UINT8_MAX; } if (attrs[TCA_FLOWER_KEY_FLAGS_MASK]) { key->flags = ntohl(nl_attr_get_be32(attrs[TCA_FLOWER_KEY_FLAGS])); mask->flags = ntohl(nl_attr_get_be32(attrs[TCA_FLOWER_KEY_FLAGS_MASK])); } if (attrs[TCA_FLOWER_KEY_IPV4_SRC_MASK]) { key->ipv4.ipv4_src = nl_attr_get_be32(attrs[TCA_FLOWER_KEY_IPV4_SRC]); mask->ipv4.ipv4_src = nl_attr_get_be32(attrs[TCA_FLOWER_KEY_IPV4_SRC_MASK]); } if (attrs[TCA_FLOWER_KEY_IPV4_DST_MASK]) { key->ipv4.ipv4_dst = nl_attr_get_be32(attrs[TCA_FLOWER_KEY_IPV4_DST]); mask->ipv4.ipv4_dst = nl_attr_get_be32(attrs[TCA_FLOWER_KEY_IPV4_DST_MASK]); } if (attrs[TCA_FLOWER_KEY_IPV6_SRC_MASK]) { struct nlattr *attr = attrs[TCA_FLOWER_KEY_IPV6_SRC]; struct nlattr *attr_mask = attrs[TCA_FLOWER_KEY_IPV6_SRC_MASK]; key->ipv6.ipv6_src = nl_attr_get_in6_addr(attr); mask->ipv6.ipv6_src = nl_attr_get_in6_addr(attr_mask); } if (attrs[TCA_FLOWER_KEY_IPV6_DST_MASK]) { struct nlattr *attr = attrs[TCA_FLOWER_KEY_IPV6_DST]; struct nlattr *attr_mask = attrs[TCA_FLOWER_KEY_IPV6_DST_MASK]; key->ipv6.ipv6_dst = nl_attr_get_in6_addr(attr); mask->ipv6.ipv6_dst = nl_attr_get_in6_addr(attr_mask); } if (ip_proto == IPPROTO_TCP) { if (attrs[TCA_FLOWER_KEY_TCP_SRC_MASK]) { key->tcp_src = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_TCP_SRC]); mask->tcp_src = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_TCP_SRC_MASK]); } if (attrs[TCA_FLOWER_KEY_TCP_DST_MASK]) { key->tcp_dst = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_TCP_DST]); mask->tcp_dst = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_TCP_DST_MASK]); } if (attrs[TCA_FLOWER_KEY_TCP_FLAGS_MASK]) { key->tcp_flags = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_TCP_FLAGS]); mask->tcp_flags = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_TCP_FLAGS_MASK]); } } else if (ip_proto == IPPROTO_UDP) { if (attrs[TCA_FLOWER_KEY_UDP_SRC_MASK]) { key->udp_src = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_UDP_SRC]); mask->udp_src = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_UDP_SRC_MASK]); } if (attrs[TCA_FLOWER_KEY_UDP_DST_MASK]) { key->udp_dst = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_UDP_DST]); mask->udp_dst = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_UDP_DST_MASK]); } } else if (ip_proto == IPPROTO_SCTP) { if (attrs[TCA_FLOWER_KEY_SCTP_SRC_MASK]) { key->sctp_src = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_SCTP_SRC]); mask->sctp_src = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_SCTP_SRC_MASK]); } if (attrs[TCA_FLOWER_KEY_SCTP_DST_MASK]) { key->sctp_dst = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_SCTP_DST]); mask->sctp_dst = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_SCTP_DST_MASK]); } } if (attrs[TCA_FLOWER_KEY_IP_TTL_MASK]) { key->ip_ttl = nl_attr_get_u8(attrs[TCA_FLOWER_KEY_IP_TTL]); mask->ip_ttl = nl_attr_get_u8(attrs[TCA_FLOWER_KEY_IP_TTL_MASK]); } } static const struct nl_policy pedit_policy[] = { [TCA_PEDIT_PARMS_EX] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct tc_pedit), .optional = false, }, [TCA_PEDIT_KEYS_EX] = { .type = NL_A_NESTED, .optional = false, }, }; static int nl_parse_act_pedit(struct nlattr *options, struct tc_flower *flower) { struct tc_action *action; struct nlattr *pe_attrs[ARRAY_SIZE(pedit_policy)]; const struct tc_pedit *pe; const struct tc_pedit_key *keys; const struct nlattr *nla, *keys_ex, *ex_type; const void *keys_attr; char *rewrite_key = (void *) &flower->rewrite.key; char *rewrite_mask = (void *) &flower->rewrite.mask; size_t keys_ex_size, left; int type, i = 0, err; if (!nl_parse_nested(options, pedit_policy, pe_attrs, ARRAY_SIZE(pedit_policy))) { VLOG_ERR_RL(&error_rl, "failed to parse pedit action options"); return EPROTO; } pe = nl_attr_get_unspec(pe_attrs[TCA_PEDIT_PARMS_EX], sizeof *pe); keys = pe->keys; keys_attr = pe_attrs[TCA_PEDIT_KEYS_EX]; keys_ex = nl_attr_get(keys_attr); keys_ex_size = nl_attr_get_size(keys_attr); NL_ATTR_FOR_EACH (nla, left, keys_ex, keys_ex_size) { if (i >= pe->nkeys) { break; } if (nl_attr_type(nla) != TCA_PEDIT_KEY_EX) { VLOG_ERR_RL(&error_rl, "unable to parse legacy pedit type: %d", nl_attr_type(nla)); return EOPNOTSUPP; } ex_type = nl_attr_find_nested(nla, TCA_PEDIT_KEY_EX_HTYPE); type = nl_attr_get_u16(ex_type); err = csum_update_flag(flower, type); if (err) { return err; } for (int j = 0; j < ARRAY_SIZE(flower_pedit_map); j++) { struct flower_key_to_pedit *m = &flower_pedit_map[j]; int flower_off = m->flower_offset; int sz = m->size; int mf = m->offset; if (m->htype != type) { continue; } /* check overlap between current pedit key, which is always * 4 bytes (range [off, off + 3]), and a map entry in * flower_pedit_map (range [mf, mf + sz - 1]) */ if ((keys->off >= mf && keys->off < mf + sz) || (keys->off + 3 >= mf && keys->off + 3 < mf + sz)) { int diff = flower_off + (keys->off - mf); uint32_t *dst = (void *) (rewrite_key + diff); uint32_t *dst_m = (void *) (rewrite_mask + diff); uint32_t mask = ~(keys->mask); uint32_t zero_bits; if (keys->off < mf) { zero_bits = 8 * (mf - keys->off); mask &= UINT32_MAX << zero_bits; } else if (keys->off + 4 > mf + m->size) { zero_bits = 8 * (keys->off + 4 - mf - m->size); mask &= UINT32_MAX >> zero_bits; } *dst_m |= mask; *dst |= keys->val & mask; } } keys++; i++; } action = &flower->actions[flower->action_count++]; action->type = TC_ACT_PEDIT; return 0; } static const struct nl_policy tunnel_key_policy[] = { [TCA_TUNNEL_KEY_PARMS] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct tc_tunnel_key), .optional = false, }, [TCA_TUNNEL_KEY_ENC_IPV4_SRC] = { .type = NL_A_U32, .optional = true, }, [TCA_TUNNEL_KEY_ENC_IPV4_DST] = { .type = NL_A_U32, .optional = true, }, [TCA_TUNNEL_KEY_ENC_IPV6_SRC] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct in6_addr), .optional = true, }, [TCA_TUNNEL_KEY_ENC_IPV6_DST] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct in6_addr), .optional = true, }, [TCA_TUNNEL_KEY_ENC_KEY_ID] = { .type = NL_A_U32, .optional = true, }, [TCA_TUNNEL_KEY_ENC_DST_PORT] = { .type = NL_A_U16, .optional = true, }, }; static int nl_parse_act_tunnel_key(struct nlattr *options, struct tc_flower *flower) { struct nlattr *tun_attrs[ARRAY_SIZE(tunnel_key_policy)]; const struct nlattr *tun_parms; const struct tc_tunnel_key *tun; struct tc_action *action; if (!nl_parse_nested(options, tunnel_key_policy, tun_attrs, ARRAY_SIZE(tunnel_key_policy))) { VLOG_ERR_RL(&error_rl, "failed to parse tunnel_key action options"); return EPROTO; } tun_parms = tun_attrs[TCA_TUNNEL_KEY_PARMS]; tun = nl_attr_get_unspec(tun_parms, sizeof *tun); if (tun->t_action == TCA_TUNNEL_KEY_ACT_SET) { struct nlattr *id = tun_attrs[TCA_TUNNEL_KEY_ENC_KEY_ID]; struct nlattr *dst_port = tun_attrs[TCA_TUNNEL_KEY_ENC_DST_PORT]; struct nlattr *ipv4_src = tun_attrs[TCA_TUNNEL_KEY_ENC_IPV4_SRC]; struct nlattr *ipv4_dst = tun_attrs[TCA_TUNNEL_KEY_ENC_IPV4_DST]; struct nlattr *ipv6_src = tun_attrs[TCA_TUNNEL_KEY_ENC_IPV6_SRC]; struct nlattr *ipv6_dst = tun_attrs[TCA_TUNNEL_KEY_ENC_IPV6_DST]; action = &flower->actions[flower->action_count++]; action->type = TC_ACT_ENCAP; action->encap.ipv4.ipv4_src = ipv4_src ? nl_attr_get_be32(ipv4_src) : 0; action->encap.ipv4.ipv4_dst = ipv4_dst ? nl_attr_get_be32(ipv4_dst) : 0; if (ipv6_src) { action->encap.ipv6.ipv6_src = nl_attr_get_in6_addr(ipv6_src); } if (ipv6_dst) { action->encap.ipv6.ipv6_dst = nl_attr_get_in6_addr(ipv6_dst); } action->encap.id = id ? be32_to_be64(nl_attr_get_be32(id)) : 0; action->encap.tp_dst = dst_port ? nl_attr_get_be16(dst_port) : 0; } else if (tun->t_action == TCA_TUNNEL_KEY_ACT_RELEASE) { flower->tunnel.tunnel = true; } else { VLOG_ERR_RL(&error_rl, "unknown tunnel actions: %d, %d", tun->action, tun->t_action); return EINVAL; } return 0; } static const struct nl_policy gact_policy[] = { [TCA_GACT_PARMS] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct tc_gact), .optional = false, }, [TCA_GACT_TM] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct tcf_t), .optional = false, }, }; static int get_user_hz(void) { static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; static int user_hz = 100; if (ovsthread_once_start(&once)) { user_hz = sysconf(_SC_CLK_TCK); ovsthread_once_done(&once); } return user_hz; } static void nl_parse_tcf(const struct tcf_t *tm, struct tc_flower *flower) { flower->lastused = time_msec() - (tm->lastuse * 1000 / get_user_hz()); } static int nl_parse_act_drop(struct nlattr *options, struct tc_flower *flower) { struct nlattr *gact_attrs[ARRAY_SIZE(gact_policy)]; const struct tc_gact *p; struct nlattr *gact_parms; const struct tcf_t *tm; if (!nl_parse_nested(options, gact_policy, gact_attrs, ARRAY_SIZE(gact_policy))) { VLOG_ERR_RL(&error_rl, "failed to parse gact action options"); return EPROTO; } gact_parms = gact_attrs[TCA_GACT_PARMS]; p = nl_attr_get_unspec(gact_parms, sizeof *p); if (p->action != TC_ACT_SHOT) { VLOG_ERR_RL(&error_rl, "unknown gact action: %d", p->action); return EINVAL; } tm = nl_attr_get_unspec(gact_attrs[TCA_GACT_TM], sizeof *tm); nl_parse_tcf(tm, flower); return 0; } static const struct nl_policy mirred_policy[] = { [TCA_MIRRED_PARMS] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct tc_mirred), .optional = false, }, [TCA_MIRRED_TM] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct tcf_t), .optional = false, }, }; static int nl_parse_act_mirred(struct nlattr *options, struct tc_flower *flower) { struct nlattr *mirred_attrs[ARRAY_SIZE(mirred_policy)]; const struct tc_mirred *m; const struct nlattr *mirred_parms; const struct tcf_t *tm; struct nlattr *mirred_tm; struct tc_action *action; if (!nl_parse_nested(options, mirred_policy, mirred_attrs, ARRAY_SIZE(mirred_policy))) { VLOG_ERR_RL(&error_rl, "failed to parse mirred action options"); return EPROTO; } mirred_parms = mirred_attrs[TCA_MIRRED_PARMS]; m = nl_attr_get_unspec(mirred_parms, sizeof *m); if (m->eaction != TCA_EGRESS_REDIR && m->eaction != TCA_EGRESS_MIRROR) { VLOG_ERR_RL(&error_rl, "unknown mirred action: %d, %d, %d", m->action, m->eaction, m->ifindex); return EINVAL; } action = &flower->actions[flower->action_count++]; action->ifindex_out = m->ifindex; action->type = TC_ACT_OUTPUT; mirred_tm = mirred_attrs[TCA_MIRRED_TM]; tm = nl_attr_get_unspec(mirred_tm, sizeof *tm); nl_parse_tcf(tm, flower); return 0; } static const struct nl_policy vlan_policy[] = { [TCA_VLAN_PARMS] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct tc_vlan), .optional = false, }, [TCA_VLAN_PUSH_VLAN_ID] = { .type = NL_A_U16, .optional = true, }, [TCA_VLAN_PUSH_VLAN_PROTOCOL] = { .type = NL_A_U16, .optional = true, }, [TCA_VLAN_PUSH_VLAN_PRIORITY] = { .type = NL_A_U8, .optional = true, }, }; static int nl_parse_act_vlan(struct nlattr *options, struct tc_flower *flower) { struct nlattr *vlan_attrs[ARRAY_SIZE(vlan_policy)]; const struct tc_vlan *v; const struct nlattr *vlan_parms; struct tc_action *action; if (!nl_parse_nested(options, vlan_policy, vlan_attrs, ARRAY_SIZE(vlan_policy))) { VLOG_ERR_RL(&error_rl, "failed to parse vlan action options"); return EPROTO; } action = &flower->actions[flower->action_count++]; vlan_parms = vlan_attrs[TCA_VLAN_PARMS]; v = nl_attr_get_unspec(vlan_parms, sizeof *v); if (v->v_action == TCA_VLAN_ACT_PUSH) { struct nlattr *vlan_id = vlan_attrs[TCA_VLAN_PUSH_VLAN_ID]; struct nlattr *vlan_prio = vlan_attrs[TCA_VLAN_PUSH_VLAN_PRIORITY]; action->vlan.vlan_push_id = nl_attr_get_u16(vlan_id); action->vlan.vlan_push_prio = vlan_prio ? nl_attr_get_u8(vlan_prio) : 0; action->type = TC_ACT_VLAN_PUSH; } else if (v->v_action == TCA_VLAN_ACT_POP) { action->type = TC_ACT_VLAN_POP; } else { VLOG_ERR_RL(&error_rl, "unknown vlan action: %d, %d", v->action, v->v_action); return EINVAL; } return 0; } static const struct nl_policy csum_policy[] = { [TCA_CSUM_PARMS] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct tc_csum), .optional = false, }, }; static int nl_parse_act_csum(struct nlattr *options, struct tc_flower *flower) { struct nlattr *csum_attrs[ARRAY_SIZE(csum_policy)]; const struct tc_csum *c; const struct nlattr *csum_parms; if (!nl_parse_nested(options, csum_policy, csum_attrs, ARRAY_SIZE(csum_policy))) { VLOG_ERR_RL(&error_rl, "failed to parse csum action options"); return EPROTO; } csum_parms = csum_attrs[TCA_CSUM_PARMS]; c = nl_attr_get_unspec(csum_parms, sizeof *c); /* sanity checks */ if (c->update_flags != flower->csum_update_flags) { VLOG_WARN_RL(&error_rl, "expected different act csum flags: 0x%x != 0x%x", flower->csum_update_flags, c->update_flags); return EINVAL; } flower->csum_update_flags = 0; /* so we know csum was handled */ if (flower->needs_full_ip_proto_mask && flower->mask.ip_proto != UINT8_MAX) { VLOG_WARN_RL(&error_rl, "expected full matching on flower ip_proto"); return EINVAL; } return 0; } static const struct nl_policy act_policy[] = { [TCA_ACT_KIND] = { .type = NL_A_STRING, .optional = false, }, [TCA_ACT_COOKIE] = { .type = NL_A_UNSPEC, .optional = true, }, [TCA_ACT_OPTIONS] = { .type = NL_A_NESTED, .optional = false, }, [TCA_ACT_STATS] = { .type = NL_A_NESTED, .optional = false, }, }; static const struct nl_policy stats_policy[] = { [TCA_STATS_BASIC] = { .type = NL_A_UNSPEC, .min_len = sizeof(struct gnet_stats_basic), .optional = false, }, }; static int nl_parse_single_action(struct nlattr *action, struct tc_flower *flower) { struct nlattr *act_options; struct nlattr *act_stats; struct nlattr *act_cookie; const char *act_kind; struct nlattr *action_attrs[ARRAY_SIZE(act_policy)]; struct nlattr *stats_attrs[ARRAY_SIZE(stats_policy)]; struct ovs_flow_stats *stats = &flower->stats; const struct gnet_stats_basic *bs; int err = 0; if (!nl_parse_nested(action, act_policy, action_attrs, ARRAY_SIZE(act_policy))) { VLOG_ERR_RL(&error_rl, "failed to parse single action options"); return EPROTO; } act_kind = nl_attr_get_string(action_attrs[TCA_ACT_KIND]); act_options = action_attrs[TCA_ACT_OPTIONS]; act_cookie = action_attrs[TCA_ACT_COOKIE]; if (!strcmp(act_kind, "gact")) { err = nl_parse_act_drop(act_options, flower); } else if (!strcmp(act_kind, "mirred")) { err = nl_parse_act_mirred(act_options, flower); } else if (!strcmp(act_kind, "vlan")) { err = nl_parse_act_vlan(act_options, flower); } else if (!strcmp(act_kind, "tunnel_key")) { err = nl_parse_act_tunnel_key(act_options, flower); } else if (!strcmp(act_kind, "pedit")) { err = nl_parse_act_pedit(act_options, flower); } else if (!strcmp(act_kind, "csum")) { nl_parse_act_csum(act_options, flower); } else { VLOG_ERR_RL(&error_rl, "unknown tc action kind: %s", act_kind); err = EINVAL; } if (err) { return err; } if (act_cookie) { flower->act_cookie.data = nl_attr_get(act_cookie); flower->act_cookie.len = nl_attr_get_size(act_cookie); } act_stats = action_attrs[TCA_ACT_STATS]; if (!nl_parse_nested(act_stats, stats_policy, stats_attrs, ARRAY_SIZE(stats_policy))) { VLOG_ERR_RL(&error_rl, "failed to parse action stats policy"); return EPROTO; } bs = nl_attr_get_unspec(stats_attrs[TCA_STATS_BASIC], sizeof *bs); put_32aligned_u64(&stats->n_packets, bs->packets); put_32aligned_u64(&stats->n_bytes, bs->bytes); return 0; } #define TCA_ACT_MIN_PRIO 1 static int nl_parse_flower_actions(struct nlattr **attrs, struct tc_flower *flower) { const struct nlattr *actions = attrs[TCA_FLOWER_ACT]; static struct nl_policy actions_orders_policy[TCA_ACT_MAX_PRIO + 1] = {}; struct nlattr *actions_orders[ARRAY_SIZE(actions_orders_policy)]; const int max_size = ARRAY_SIZE(actions_orders_policy); for (int i = TCA_ACT_MIN_PRIO; i < max_size; i++) { actions_orders_policy[i].type = NL_A_NESTED; actions_orders_policy[i].optional = true; } if (!nl_parse_nested(actions, actions_orders_policy, actions_orders, ARRAY_SIZE(actions_orders_policy))) { VLOG_ERR_RL(&error_rl, "failed to parse flower order of actions"); return EPROTO; } for (int i = TCA_ACT_MIN_PRIO; i < max_size; i++) { if (actions_orders[i]) { int err; if (flower->action_count >= TCA_ACT_MAX_PRIO) { VLOG_DBG_RL(&error_rl, "Can only support %d actions", flower->action_count); return EOPNOTSUPP; } err = nl_parse_single_action(actions_orders[i], flower); if (err) { return err; } } } if (flower->csum_update_flags) { VLOG_WARN_RL(&error_rl, "expected act csum with flags: 0x%x", flower->csum_update_flags); return EINVAL; } return 0; } static int nl_parse_flower_options(struct nlattr *nl_options, struct tc_flower *flower) { struct nlattr *attrs[ARRAY_SIZE(tca_flower_policy)]; if (!nl_parse_nested(nl_options, tca_flower_policy, attrs, ARRAY_SIZE(tca_flower_policy))) { VLOG_ERR_RL(&error_rl, "failed to parse flower classifier options"); return EPROTO; } nl_parse_flower_eth(attrs, flower); nl_parse_flower_vlan(attrs, flower); nl_parse_flower_ip(attrs, flower); nl_parse_flower_tunnel(attrs, flower); return nl_parse_flower_actions(attrs, flower); } int parse_netlink_to_tc_flower(struct ofpbuf *reply, struct tc_flower *flower) { struct tcmsg *tc; struct nlattr *ta[ARRAY_SIZE(tca_policy)]; const char *kind; if (NLMSG_HDRLEN + sizeof *tc > reply->size) { return EPROTO; } memset(flower, 0, sizeof *flower); tc = ofpbuf_at_assert(reply, NLMSG_HDRLEN, sizeof *tc); flower->handle = tc->tcm_handle; flower->key.eth_type = (OVS_FORCE ovs_be16) tc_get_minor(tc->tcm_info); flower->mask.eth_type = OVS_BE16_MAX; flower->prio = tc_get_major(tc->tcm_info); if (!flower->handle) { return EAGAIN; } if (!nl_policy_parse(reply, NLMSG_HDRLEN + sizeof *tc, tca_policy, ta, ARRAY_SIZE(ta))) { VLOG_ERR_RL(&error_rl, "failed to parse tca policy"); return EPROTO; } kind = nl_attr_get_string(ta[TCA_KIND]); if (strcmp(kind, "flower")) { VLOG_DBG_ONCE("Unsupported filter: %s", kind); return EPROTO; } return nl_parse_flower_options(ta[TCA_OPTIONS], flower); } int tc_dump_flower_start(int ifindex, struct nl_dump *dump) { struct ofpbuf request; struct tcmsg *tcmsg; tcmsg = tc_make_request(ifindex, RTM_GETTFILTER, NLM_F_DUMP, &request); tcmsg->tcm_parent = TC_INGRESS_PARENT; tcmsg->tcm_info = TC_H_UNSPEC; tcmsg->tcm_handle = 0; nl_dump_start(dump, NETLINK_ROUTE, &request); ofpbuf_uninit(&request); return 0; } int tc_flush(int ifindex) { struct ofpbuf request; struct tcmsg *tcmsg; tcmsg = tc_make_request(ifindex, RTM_DELTFILTER, NLM_F_ACK, &request); tcmsg->tcm_parent = TC_INGRESS_PARENT; tcmsg->tcm_info = TC_H_UNSPEC; return tc_transact(&request, NULL); } int tc_del_filter(int ifindex, int prio, int handle) { struct ofpbuf request; struct tcmsg *tcmsg; struct ofpbuf *reply; int error; tcmsg = tc_make_request(ifindex, RTM_DELTFILTER, NLM_F_ECHO, &request); tcmsg->tcm_parent = TC_INGRESS_PARENT; tcmsg->tcm_info = tc_make_handle(prio, 0); tcmsg->tcm_handle = handle; error = tc_transact(&request, &reply); if (!error) { ofpbuf_delete(reply); } return error; } int tc_get_flower(int ifindex, int prio, int handle, struct tc_flower *flower) { struct ofpbuf request; struct tcmsg *tcmsg; struct ofpbuf *reply; int error; tcmsg = tc_make_request(ifindex, RTM_GETTFILTER, NLM_F_ECHO, &request); tcmsg->tcm_parent = TC_INGRESS_PARENT; tcmsg->tcm_info = tc_make_handle(prio, 0); tcmsg->tcm_handle = handle; error = tc_transact(&request, &reply); if (error) { return error; } error = parse_netlink_to_tc_flower(reply, flower); ofpbuf_delete(reply); return error; } static int tc_get_tc_cls_policy(enum tc_offload_policy policy) { if (policy == TC_POLICY_SKIP_HW) { return TCA_CLS_FLAGS_SKIP_HW; } else if (policy == TC_POLICY_SKIP_SW) { return TCA_CLS_FLAGS_SKIP_SW; } return 0; } static void nl_msg_put_act_csum(struct ofpbuf *request, uint32_t flags) { size_t offset; nl_msg_put_string(request, TCA_ACT_KIND, "csum"); offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS); { struct tc_csum parm = { .action = TC_ACT_PIPE, .update_flags = flags }; nl_msg_put_unspec(request, TCA_CSUM_PARMS, &parm, sizeof parm); } nl_msg_end_nested(request, offset); } static void nl_msg_put_act_pedit(struct ofpbuf *request, struct tc_pedit *parm, struct tc_pedit_key_ex *ex) { size_t ksize = sizeof *parm + parm->nkeys * sizeof(struct tc_pedit_key); size_t offset, offset_keys_ex, offset_key; int i; nl_msg_put_string(request, TCA_ACT_KIND, "pedit"); offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS); { parm->action = TC_ACT_PIPE; nl_msg_put_unspec(request, TCA_PEDIT_PARMS_EX, parm, ksize); offset_keys_ex = nl_msg_start_nested(request, TCA_PEDIT_KEYS_EX); for (i = 0; i < parm->nkeys; i++, ex++) { offset_key = nl_msg_start_nested(request, TCA_PEDIT_KEY_EX); nl_msg_put_u16(request, TCA_PEDIT_KEY_EX_HTYPE, ex->htype); nl_msg_put_u16(request, TCA_PEDIT_KEY_EX_CMD, ex->cmd); nl_msg_end_nested(request, offset_key); } nl_msg_end_nested(request, offset_keys_ex); } nl_msg_end_nested(request, offset); } static void nl_msg_put_act_push_vlan(struct ofpbuf *request, uint16_t vid, uint8_t prio) { size_t offset; nl_msg_put_string(request, TCA_ACT_KIND, "vlan"); offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS); { struct tc_vlan parm = { .action = TC_ACT_PIPE, .v_action = TCA_VLAN_ACT_PUSH }; nl_msg_put_unspec(request, TCA_VLAN_PARMS, &parm, sizeof parm); nl_msg_put_u16(request, TCA_VLAN_PUSH_VLAN_ID, vid); nl_msg_put_u8(request, TCA_VLAN_PUSH_VLAN_PRIORITY, prio); } nl_msg_end_nested(request, offset); } static void nl_msg_put_act_pop_vlan(struct ofpbuf *request) { size_t offset; nl_msg_put_string(request, TCA_ACT_KIND, "vlan"); offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS); { struct tc_vlan parm = { .action = TC_ACT_PIPE, .v_action = TCA_VLAN_ACT_POP }; nl_msg_put_unspec(request, TCA_VLAN_PARMS, &parm, sizeof parm); } nl_msg_end_nested(request, offset); } static void nl_msg_put_act_tunnel_key_release(struct ofpbuf *request) { size_t offset; nl_msg_put_string(request, TCA_ACT_KIND, "tunnel_key"); offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS); { struct tc_tunnel_key tun = { .action = TC_ACT_PIPE, .t_action = TCA_TUNNEL_KEY_ACT_RELEASE }; nl_msg_put_unspec(request, TCA_TUNNEL_KEY_PARMS, &tun, sizeof tun); } nl_msg_end_nested(request, offset); } static void nl_msg_put_act_tunnel_key_set(struct ofpbuf *request, ovs_be64 id, ovs_be32 ipv4_src, ovs_be32 ipv4_dst, struct in6_addr *ipv6_src, struct in6_addr *ipv6_dst, ovs_be16 tp_dst) { size_t offset; nl_msg_put_string(request, TCA_ACT_KIND, "tunnel_key"); offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS); { struct tc_tunnel_key tun = { .action = TC_ACT_PIPE, .t_action = TCA_TUNNEL_KEY_ACT_SET }; nl_msg_put_unspec(request, TCA_TUNNEL_KEY_PARMS, &tun, sizeof tun); ovs_be32 id32 = be64_to_be32(id); nl_msg_put_be32(request, TCA_TUNNEL_KEY_ENC_KEY_ID, id32); if (ipv4_dst) { nl_msg_put_be32(request, TCA_TUNNEL_KEY_ENC_IPV4_SRC, ipv4_src); nl_msg_put_be32(request, TCA_TUNNEL_KEY_ENC_IPV4_DST, ipv4_dst); } else if (!is_all_zeros(ipv6_dst, sizeof *ipv6_dst)) { nl_msg_put_in6_addr(request, TCA_TUNNEL_KEY_ENC_IPV6_DST, ipv6_dst); nl_msg_put_in6_addr(request, TCA_TUNNEL_KEY_ENC_IPV6_SRC, ipv6_src); } nl_msg_put_be16(request, TCA_TUNNEL_KEY_ENC_DST_PORT, tp_dst); } nl_msg_end_nested(request, offset); } static void nl_msg_put_act_drop(struct ofpbuf *request) { size_t offset; nl_msg_put_string(request, TCA_ACT_KIND, "gact"); offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS); { struct tc_gact p = { .action = TC_ACT_SHOT }; nl_msg_put_unspec(request, TCA_GACT_PARMS, &p, sizeof p); } nl_msg_end_nested(request, offset); } static void nl_msg_put_act_mirred(struct ofpbuf *request, int ifindex, int action, int eaction) { size_t offset; nl_msg_put_string(request, TCA_ACT_KIND, "mirred"); offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS); { struct tc_mirred m = { .action = action, .eaction = eaction, .ifindex = ifindex }; nl_msg_put_unspec(request, TCA_MIRRED_PARMS, &m, sizeof m); } nl_msg_end_nested(request, offset); } static inline void nl_msg_put_act_cookie(struct ofpbuf *request, struct tc_cookie *ck) { if (ck->len) { nl_msg_put_unspec(request, TCA_ACT_COOKIE, ck->data, ck->len); } } /* Given flower, a key_to_pedit map entry, calculates the rest, * where: * * mask, data - pointers of where read the first word of flower->key/mask. * current_offset - which offset to use for the first pedit action. * cnt - max pedits actions to use. * first_word_mask/last_word_mask - the mask to use for the first/last read * (as we read entire words). */ static void calc_offsets(struct tc_flower *flower, struct flower_key_to_pedit *m, int *cur_offset, int *cnt, uint32_t *last_word_mask, uint32_t *first_word_mask, uint32_t **mask, uint32_t **data) { int start_offset, max_offset, total_size; int diff, right_zero_bits, left_zero_bits; char *rewrite_key = (void *) &flower->rewrite.key; char *rewrite_mask = (void *) &flower->rewrite.mask; max_offset = m->offset + m->size; start_offset = ROUND_DOWN(m->offset, 4); diff = m->offset - start_offset; total_size = max_offset - start_offset; right_zero_bits = 8 * (4 - (max_offset % 4)); left_zero_bits = 8 * (m->offset - start_offset); *cur_offset = start_offset; *cnt = (total_size / 4) + (total_size % 4 ? 1 : 0); *last_word_mask = UINT32_MAX >> right_zero_bits; *first_word_mask = UINT32_MAX << left_zero_bits; *data = (void *) (rewrite_key + m->flower_offset - diff); *mask = (void *) (rewrite_mask + m->flower_offset - diff); } static inline int csum_update_flag(struct tc_flower *flower, enum pedit_header_type htype) { /* Explictily specifiy the csum flags so HW can return EOPNOTSUPP * if it doesn't support a checksum recalculation of some headers. * And since OVS allows a flow such as * eth(dst=),eth_type(0x0800) actions=set(ipv4(src=)) * we need to force a more specific flow as this can, for example, * need a recalculation of icmp checksum if the packet that passes * is ICMPv6 and tcp checksum if its tcp. */ switch (htype) { case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4: flower->csum_update_flags |= TCA_CSUM_UPDATE_FLAG_IPV4HDR; /* Fall through. */ case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6: case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP: case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP: if (flower->key.ip_proto == IPPROTO_TCP) { flower->needs_full_ip_proto_mask = true; flower->csum_update_flags |= TCA_CSUM_UPDATE_FLAG_TCP; } else if (flower->key.ip_proto == IPPROTO_UDP) { flower->needs_full_ip_proto_mask = true; flower->csum_update_flags |= TCA_CSUM_UPDATE_FLAG_UDP; } else if (flower->key.ip_proto == IPPROTO_ICMP) { flower->needs_full_ip_proto_mask = true; } else if (flower->key.ip_proto == IPPROTO_ICMPV6) { flower->needs_full_ip_proto_mask = true; flower->csum_update_flags |= TCA_CSUM_UPDATE_FLAG_ICMP; } else { VLOG_WARN_RL(&error_rl, "can't offload rewrite of IP/IPV6 with ip_proto: %d", flower->key.ip_proto); break; } /* Fall through. */ case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH: return 0; /* success */ case TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK: case __PEDIT_HDR_TYPE_MAX: default: break; } return EOPNOTSUPP; } static int nl_msg_put_flower_rewrite_pedits(struct ofpbuf *request, struct tc_flower *flower) { struct { struct tc_pedit sel; struct tc_pedit_key keys[MAX_PEDIT_OFFSETS]; struct tc_pedit_key_ex keys_ex[MAX_PEDIT_OFFSETS]; } sel = { .sel = { .nkeys = 0 } }; int i, j, err; for (i = 0; i < ARRAY_SIZE(flower_pedit_map); i++) { struct flower_key_to_pedit *m = &flower_pedit_map[i]; struct tc_pedit_key *pedit_key = NULL; struct tc_pedit_key_ex *pedit_key_ex = NULL; uint32_t *mask, *data, first_word_mask, last_word_mask; int cnt = 0, cur_offset = 0; if (!m->size) { continue; } calc_offsets(flower, m, &cur_offset, &cnt, &last_word_mask, &first_word_mask, &mask, &data); for (j = 0; j < cnt; j++, mask++, data++, cur_offset += 4) { uint32_t mask_word = *mask; if (j == 0) { mask_word &= first_word_mask; } if (j == cnt - 1) { mask_word &= last_word_mask; } if (!mask_word) { continue; } if (sel.sel.nkeys == MAX_PEDIT_OFFSETS) { VLOG_WARN_RL(&error_rl, "reached too many pedit offsets: %d", MAX_PEDIT_OFFSETS); return EOPNOTSUPP; } pedit_key = &sel.keys[sel.sel.nkeys]; pedit_key_ex = &sel.keys_ex[sel.sel.nkeys]; pedit_key_ex->cmd = TCA_PEDIT_KEY_EX_CMD_SET; pedit_key_ex->htype = m->htype; pedit_key->off = cur_offset; pedit_key->mask = ~mask_word; pedit_key->val = *data & mask_word; sel.sel.nkeys++; err = csum_update_flag(flower, m->htype); if (err) { return err; } if (flower->needs_full_ip_proto_mask) { flower->mask.ip_proto = UINT8_MAX; } } } nl_msg_put_act_pedit(request, &sel.sel, sel.keys_ex); return 0; } static int nl_msg_put_flower_acts(struct ofpbuf *request, struct tc_flower *flower) { size_t offset; size_t act_offset; uint16_t act_index = 1; struct tc_action *action; int i, ifindex = 0; offset = nl_msg_start_nested(request, TCA_FLOWER_ACT); { int error; if (flower->tunnel.tunnel) { act_offset = nl_msg_start_nested(request, act_index++); nl_msg_put_act_tunnel_key_release(request); nl_msg_end_nested(request, act_offset); } action = flower->actions; for (i = 0; i < flower->action_count; i++, action++) { switch (action->type) { case TC_ACT_PEDIT: { act_offset = nl_msg_start_nested(request, act_index++); error = nl_msg_put_flower_rewrite_pedits(request, flower); if (error) { return error; } nl_msg_end_nested(request, act_offset); if (flower->csum_update_flags) { act_offset = nl_msg_start_nested(request, act_index++); nl_msg_put_act_csum(request, flower->csum_update_flags); nl_msg_end_nested(request, act_offset); } } break; case TC_ACT_ENCAP: { act_offset = nl_msg_start_nested(request, act_index++); nl_msg_put_act_tunnel_key_set(request, action->encap.id, action->encap.ipv4.ipv4_src, action->encap.ipv4.ipv4_dst, &action->encap.ipv6.ipv6_src, &action->encap.ipv6.ipv6_dst, action->encap.tp_dst); nl_msg_end_nested(request, act_offset); } break; case TC_ACT_VLAN_POP: { act_offset = nl_msg_start_nested(request, act_index++); nl_msg_put_act_pop_vlan(request); nl_msg_end_nested(request, act_offset); } break; case TC_ACT_VLAN_PUSH: { act_offset = nl_msg_start_nested(request, act_index++); nl_msg_put_act_push_vlan(request, action->vlan.vlan_push_id, action->vlan.vlan_push_prio); nl_msg_end_nested(request, act_offset); } break; case TC_ACT_OUTPUT: { ifindex = action->ifindex_out; if (ifindex < 1) { VLOG_ERR_RL(&error_rl, "%s: invalid ifindex: %d, type: %d", __func__, ifindex, action->type); return EINVAL; } act_offset = nl_msg_start_nested(request, act_index++); if (i == flower->action_count - 1) { nl_msg_put_act_mirred(request, ifindex, TC_ACT_STOLEN, TCA_EGRESS_REDIR); } else { nl_msg_put_act_mirred(request, ifindex, TC_ACT_PIPE, TCA_EGRESS_MIRROR); } nl_msg_put_act_cookie(request, &flower->act_cookie); nl_msg_end_nested(request, act_offset); } break; } } } if (!ifindex) { act_offset = nl_msg_start_nested(request, act_index++); nl_msg_put_act_drop(request); nl_msg_put_act_cookie(request, &flower->act_cookie); nl_msg_end_nested(request, act_offset); } nl_msg_end_nested(request, offset); return 0; } static void nl_msg_put_masked_value(struct ofpbuf *request, uint16_t type, uint16_t mask_type, const void *data, const void *mask_data, size_t len) { if (mask_type != TCA_FLOWER_UNSPEC) { if (is_all_zeros(mask_data, len)) { return; } nl_msg_put_unspec(request, mask_type, mask_data, len); } nl_msg_put_unspec(request, type, data, len); } static void nl_msg_put_flower_tunnel(struct ofpbuf *request, struct tc_flower *flower) { ovs_be32 ipv4_src = flower->tunnel.ipv4.ipv4_src; ovs_be32 ipv4_dst = flower->tunnel.ipv4.ipv4_dst; struct in6_addr *ipv6_src = &flower->tunnel.ipv6.ipv6_src; struct in6_addr *ipv6_dst = &flower->tunnel.ipv6.ipv6_dst; ovs_be16 tp_dst = flower->tunnel.tp_dst; ovs_be32 id = be64_to_be32(flower->tunnel.id); nl_msg_put_be32(request, TCA_FLOWER_KEY_ENC_KEY_ID, id); if (ipv4_dst) { nl_msg_put_be32(request, TCA_FLOWER_KEY_ENC_IPV4_SRC, ipv4_src); nl_msg_put_be32(request, TCA_FLOWER_KEY_ENC_IPV4_DST, ipv4_dst); } else if (!is_all_zeros(ipv6_dst, sizeof *ipv6_dst)) { nl_msg_put_in6_addr(request, TCA_FLOWER_KEY_ENC_IPV6_SRC, ipv6_src); nl_msg_put_in6_addr(request, TCA_FLOWER_KEY_ENC_IPV6_DST, ipv6_dst); } nl_msg_put_be16(request, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, tp_dst); } #define FLOWER_PUT_MASKED_VALUE(member, type) \ nl_msg_put_masked_value(request, type, type##_MASK, &flower->key.member, \ &flower->mask.member, sizeof flower->key.member) static int nl_msg_put_flower_options(struct ofpbuf *request, struct tc_flower *flower) { uint16_t host_eth_type = ntohs(flower->key.eth_type); bool is_vlan = (host_eth_type == ETH_TYPE_VLAN); int err; /* need to parse acts first as some acts require changing the matching * see csum_update_flag() */ err = nl_msg_put_flower_acts(request, flower); if (err) { return err; } if (is_vlan) { host_eth_type = ntohs(flower->key.encap_eth_type); } FLOWER_PUT_MASKED_VALUE(dst_mac, TCA_FLOWER_KEY_ETH_DST); FLOWER_PUT_MASKED_VALUE(src_mac, TCA_FLOWER_KEY_ETH_SRC); if (host_eth_type == ETH_P_IP || host_eth_type == ETH_P_IPV6) { if (flower->mask.ip_proto && flower->key.ip_proto) { nl_msg_put_u8(request, TCA_FLOWER_KEY_IP_PROTO, flower->key.ip_proto); } if (flower->mask.flags) { nl_msg_put_be32(request, TCA_FLOWER_KEY_FLAGS, htonl(flower->key.flags)); nl_msg_put_be32(request, TCA_FLOWER_KEY_FLAGS_MASK, htonl(flower->mask.flags)); } if (flower->key.ip_proto == IPPROTO_UDP) { FLOWER_PUT_MASKED_VALUE(udp_src, TCA_FLOWER_KEY_UDP_SRC); FLOWER_PUT_MASKED_VALUE(udp_dst, TCA_FLOWER_KEY_UDP_DST); } else if (flower->key.ip_proto == IPPROTO_TCP) { FLOWER_PUT_MASKED_VALUE(tcp_src, TCA_FLOWER_KEY_TCP_SRC); FLOWER_PUT_MASKED_VALUE(tcp_dst, TCA_FLOWER_KEY_TCP_DST); FLOWER_PUT_MASKED_VALUE(tcp_flags, TCA_FLOWER_KEY_TCP_FLAGS); } else if (flower->key.ip_proto == IPPROTO_SCTP) { FLOWER_PUT_MASKED_VALUE(sctp_src, TCA_FLOWER_KEY_SCTP_SRC); FLOWER_PUT_MASKED_VALUE(sctp_dst, TCA_FLOWER_KEY_SCTP_DST); } } if (host_eth_type == ETH_P_IP) { FLOWER_PUT_MASKED_VALUE(ipv4.ipv4_src, TCA_FLOWER_KEY_IPV4_SRC); FLOWER_PUT_MASKED_VALUE(ipv4.ipv4_dst, TCA_FLOWER_KEY_IPV4_DST); FLOWER_PUT_MASKED_VALUE(ip_ttl, TCA_FLOWER_KEY_IP_TTL); } else if (host_eth_type == ETH_P_IPV6) { FLOWER_PUT_MASKED_VALUE(ipv6.ipv6_src, TCA_FLOWER_KEY_IPV6_SRC); FLOWER_PUT_MASKED_VALUE(ipv6.ipv6_dst, TCA_FLOWER_KEY_IPV6_DST); } nl_msg_put_be16(request, TCA_FLOWER_KEY_ETH_TYPE, flower->key.eth_type); if (is_vlan) { if (flower->key.vlan_id || flower->key.vlan_prio) { nl_msg_put_u16(request, TCA_FLOWER_KEY_VLAN_ID, flower->key.vlan_id); nl_msg_put_u8(request, TCA_FLOWER_KEY_VLAN_PRIO, flower->key.vlan_prio); } if (flower->key.encap_eth_type) { nl_msg_put_be16(request, TCA_FLOWER_KEY_VLAN_ETH_TYPE, flower->key.encap_eth_type); } } nl_msg_put_u32(request, TCA_FLOWER_FLAGS, tc_get_tc_cls_policy(tc_policy)); if (flower->tunnel.tunnel) { nl_msg_put_flower_tunnel(request, flower); } return 0; } int tc_replace_flower(int ifindex, uint16_t prio, uint32_t handle, struct tc_flower *flower) { struct ofpbuf request; struct tcmsg *tcmsg; struct ofpbuf *reply; int error = 0; size_t basic_offset; uint16_t eth_type = (OVS_FORCE uint16_t) flower->key.eth_type; tcmsg = tc_make_request(ifindex, RTM_NEWTFILTER, NLM_F_CREATE | NLM_F_ECHO, &request); tcmsg->tcm_parent = TC_INGRESS_PARENT; tcmsg->tcm_info = tc_make_handle(prio, eth_type); tcmsg->tcm_handle = handle; nl_msg_put_string(&request, TCA_KIND, "flower"); basic_offset = nl_msg_start_nested(&request, TCA_OPTIONS); { error = nl_msg_put_flower_options(&request, flower); if (error) { ofpbuf_uninit(&request); return error; } } nl_msg_end_nested(&request, basic_offset); error = tc_transact(&request, &reply); if (!error) { struct tcmsg *tc = ofpbuf_at_assert(reply, NLMSG_HDRLEN, sizeof *tc); flower->prio = tc_get_major(tc->tcm_info); flower->handle = tc->tcm_handle; ofpbuf_delete(reply); } return error; } void tc_set_policy(const char *policy) { if (!policy) { return; } if (!strcmp(policy, "skip_sw")) { tc_policy = TC_POLICY_SKIP_SW; } else if (!strcmp(policy, "skip_hw")) { tc_policy = TC_POLICY_SKIP_HW; } else if (!strcmp(policy, "none")) { tc_policy = TC_POLICY_NONE; } else { VLOG_WARN("tc: Invalid policy '%s'", policy); return; } VLOG_INFO("tc: Using policy '%s'", policy); }